WO2015109519A1 - Full duplex communication method and device - Google Patents

Abstract

Provided in an embodiment of the present invention are a full duplex communication method and device, for solving the problem in the prior art that signals transmitted by existing full duplex communication devices reduce the accuracy of demodulated information. The method comprises: transmitting a first signal; receiving a second signal comprising useful signals and interference signals generated after the first signal passes through an air interface; respectively simulating the interference signals generated after different frequency bands of the first signal pass through the air interface to obtain simulated interference signals corresponding to respective frequency bands; and removing the simulated interference signals corresponding to the respective frequency bands from the second signal. The embodiment of the present invention can simulate the interference signals generated after transmitted signals pass through an air interface. Due to the inclusion of useful signals and interference signals in received signals, the useful signals can be restored from the received signals based on the simulated interference signals, thus removing interference caused by transmitted signals and more accurately demodulating useful information.

Description

 Full-duplex communication method and device

 The present invention relates to the field of communications, and in particular, to a full duplex communication method and apparatus.

Background technique

 With the increasing scarcity of available spectrum resources for wireless communications, and the increasing efficiency of spectrum becomes more and more important, a full-duplex technology has been proposed in which a device transmits and receives signals at the same time and frequency. The full-duplex communication device shown in FIG. 1 includes a transmitting antenna and a receiving antenna, and the full-duplex device transmits a signal S through a transmitting antenna, and receives a signal through the receiving antenna. In addition to receiving the useful signal R, the receiving antenna also receives the interference signal S1 caused by the transmission signal S, and the intensity of the interference signal S1 is much greater than the strength of the useful signal R, so that it is difficult to separate from the received signal. A useful signal is produced to reduce the accuracy of the demodulated useful information.

 It can be seen that the signal transmitted by the full-duplex communication device itself reduces the accuracy of the demodulated useful information.

Summary of the invention

 The embodiment of the invention provides a full-duplex communication method and device, which aims to solve the problem that the signal transmitted by the existing full-duplex communication device reduces the accuracy of the demodulated useful information.

 In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

 According to a first aspect of the embodiments of the present invention, a full duplex communication method is provided, including: transmitting a first signal; receiving a second signal, wherein the second signal includes a useful signal and after the first signal passes through an air interface Forming an interference signal; respectively simulating an interference signal formed by the different frequency bands of the first signal after the air interface, to obtain an analog interference signal corresponding to each frequency band; and deleting analog interference corresponding to each frequency band from the second signal Signal to restore the useful signal.

 With reference to the first aspect, in a first possible implementation manner, the interference signals formed after the different frequency bands that respectively simulate the first signal pass through the air interface include: simulating according to the measured distortion variables of each frequency band, Interference signals formed by different frequency bands of the first signal after passing through the air interface.

In combination with the first possible implementation of the first aspect, in a second possible implementation manner, The method further includes: dividing the N resource block clusters occupied by the useful signal into M sets, and the difference between the center frequency points of the adjacent resource block clusters in each set is within a preset range, and each resource block cluster Included in the at least two resource blocks that are consecutive in frequency, the M is a positive integer, and M is less than or equal to N, and the M sets correspond to M different frequency bands; respectively, the first signal is measured before and after the air interface, in each set The distortion variable at the center frequency point, the distortion variable at the center frequency point of each set is the distortion variable corresponding to each measured frequency band.

 With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the foregoing aspect, the dividing the N resource block clusters into M sets comprises: Sorting the sizes to obtain a first sorting result; dividing the N resource block clusters into M sets according to the first sorting result.

 In conjunction with the first aspect, in a fourth possible implementation manner of the first aspect, before receiving the second signal, the method further includes:

 Transmitting the frequency resource configuration information to the user equipment, where the frequency resource configuration information includes the frequency resource information and the L, where the L is used by the user equipment to determine an interpretation manner of the frequency resource information, where the frequency resource information is used. And indicating a resource block cluster that is a transmission resource of uplink data allocated to the user equipment, where L is a positive integer.

 In combination with the first aspect to any one of the fourth possible implementation manners of the first aspect, in a fifth possible implementation manner of the first aspect, the value of the transmission parameter used in different frequency bands of the useful signal is different.

 In combination with the first aspect to any one of the fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, before the receiving the second signal, the method further includes: Transmitting the first configuration information, where the first configuration information is used to indicate a first transmission parameter value used on the first frequency band allocated to the user equipment; and sending, to the user equipment, second configuration information, the second configuration The information is used to indicate a second transmission parameter value used on the second frequency band allocated for the user equipment.

With reference to the fifth possible implementation manner of the first aspect or the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the first frequency band is composed of frequency points having the first feature The first feature includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is less than or equal to a preset value; and the second frequency band is composed of a frequency point having a second feature, The second feature includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value.

 With reference to the first aspect to any one of the seventh possible implementation manners of the first aspect, in the eighth possible implementation manner of the first aspect, the first signal is based on a predetermined precoding matrix indication and a user equipment The reported channel quality indicator determines that the channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal.

 With reference to the eighth possible implementation manner of the first aspect, in the ninth possible implementation, before the sending the first signal, the method further includes: sending the channel state information-reference signal and the predetermined precoding to the user equipment The matrix indicates; receiving the channel quality indication fed back by the user equipment.

 With reference to the eighth or the ninth possible implementation manner of the first aspect, in a tenth possible implementation manner, the process of pre-determining the precoding matrix indication includes: sequentially measuring, when sending signals by using each preset precoding matrix Interference caused by the received signal; determining a precoding matrix used by the transmission signal having the least interference to the received signal as an optimal precoding matrix used for transmitting the first signal; indicating a preamble using the optimal precoding matrix The coding matrix indicates as a predetermined precoding matrix indication.

 According to a second aspect of the embodiments of the present invention, a full duplex communication method is provided, including: transmitting a first signal; receiving a second signal, where the second signal includes a useful signal, and after the first signal passes through the air interface Forming an interference signal, the value of the transmission parameter used in different frequency bands of the useful signal is different; simulating the interference signal formed by the first signal after the air interface to obtain an analog interference signal; deleting the second signal The analog interference signal is used to restore the useful signal.

 With reference to the second aspect, in a first possible implementation, before the receiving the second signal, the method further includes: sending, to the user equipment, first configuration information, where the first configuration information is used to indicate that a first transmission parameter value used on the first frequency band allocated by the user equipment; sending, to the user equipment, second configuration information, where the second configuration information is used to indicate that the second frequency band is allocated for the user equipment Two transmission parameter values.

With reference to the first possible implementation manner of the second aspect, in a second possible implementation manner, the first frequency band is composed of a frequency point having a first feature, where the first feature includes: The difference between the center frequency points of the frequency resources occupied by the signals is less than or equal to a preset value; the second frequency band is composed of frequency points having the second feature, and the second characteristics include: a frequency occupied by the useful signal The difference between the center frequency points of the resources is greater than the preset value.

 With reference to any one of the second aspect to the second possible implementation manner of the second aspect, in a third possible implementation, the transmission parameter includes: a modulation coding scheme; or a power control parameter; or, reference Signal pattern.

 With reference to any one of the second aspect to the second possible implementation manner of the second aspect, in a fourth possible implementation, the first signal is in accordance with a predetermined precoding matrix indication and a channel reported by the user equipment. The quality indicator determines that the channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal.

 With reference to any one of the fourth possible implementation manners of the second aspect, in a fifth possible implementation, before the sending the first signal, the method further includes: sending a channel state information-reference signal to the user equipment, a predetermined precoding matrix indication; receiving the channel quality indication fed back by the user equipment.

 With reference to the fourth or fifth possible implementation manner of the second aspect, in a sixth possible implementation, the process of pre-determining the precoding matrix indication includes: sequentially measuring, when sending signals by using each preset precoding matrix Interference caused by the received signal; determining a precoding matrix used by the transmission signal having the least interference to the received signal as an optimal precoding matrix used for transmitting the first signal; indicating a preamble using the optimal precoding matrix The coding matrix indicates as a predetermined precoding matrix indication.

 According to a third aspect of the present invention, a full-duplex communication method is provided, including: transmitting a first signal, where the first signal is determined according to a predetermined precoding matrix indication and a channel quality indicator reported by a user equipment, where The channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal; receiving a second signal, where the second signal includes a useful signal and is passed by the first signal An interference signal formed after the air interface; simulating the interference signal formed by the first signal after the air interface to obtain an analog interference signal; and deleting the analog interference signal from the second signal to restore the useful signal.

With reference to the third aspect, in a first possible implementation, before the sending the first signal, the method further includes: sending, to the user equipment, channel state information-reference signal and predetermined precoding The matrix indicates; receiving the channel quality indication fed back by the user equipment.

 With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the process of pre-determining the precoding matrix indication includes: sequentially measuring, using each preset precoding matrix, to send a signal Interference caused by the received signal; a precoding matrix used by the transmission signal having the least interference to the received signal is determined as an optimal precoding matrix used for transmitting the first signal; indicating that the optimal precoding matrix is used The precoding matrix indication is indicated as a predetermined precoding matrix.

 According to a fourth aspect of the present invention, a full duplex communication method is provided, including: receiving a precoding matrix indication and a channel state information-reference signal sent by a network device; and indicating, according to the precoding matrix, the channel state The information-reference signal determines a channel quality indication, the channel quality indication being used by the network device to determine the transmitted signal.

 According to a fifth aspect of the present invention, a full duplex communication device is provided, including: a first sending module, configured to send a first signal; a first receiving module, configured to receive a second signal, the second signal The utility model includes a useful signal and an interference signal formed by the first signal passing through the air interface. The first analog module is configured to simulate an interference signal formed by different frequency bands of the first signal after the air interface, and obtain corresponding frequency bands. The first interference recovery module is configured to delete the analog interference signal corresponding to each frequency band from the second signal to restore the useful signal.

 With reference to the fifth aspect, in a first possible implementation, the first analog module includes: a first analog unit, configured to simulate different frequency bands of the first signal according to the measured distortion variables of each frequency band An interference signal formed after passing through the air interface.

With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation, the method further includes: a dividing module, configured to divide the N resource block clusters occupied by the useful signal into M sets, each The difference between the center frequency points of the adjacent resource block clusters in the set is within a preset range, each resource block cluster includes at least two resource blocks of consecutive frequencies, the M is a positive integer, and M is less than or equal to N, The M sets correspond to M different frequency bands; the first measurement module is configured to separately measure distortions of the first signal before and after the air interface at a center frequency point of each set, where each set The distortion at the center frequency is the distortion corresponding to each of the measured frequency bands. With reference to the second possible implementation manner of the fifth aspect, in a third possible implementation manner, the dividing module includes: a sorting subunit, configured to sort N resource block clusters according to a frequency, to obtain a first sorting a partitioning unit, configured to divide the N resource block clusters into M sets according to the first sorting result.

 With reference to the fifth aspect, in a fourth possible implementation, the method further includes: a second sending module, configured to send frequency resource configuration information to the user equipment, where the frequency resource configuration information includes the frequency resource information and the L, The L is used by the user equipment to determine an interpretation manner of the frequency resource information, where the frequency resource information is used to indicate a resource block cluster allocated as a transmission resource of uplink data allocated to the user equipment, where L is positive Integer.

 With reference to any one of the fifth aspect to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner, the value of the transmission parameter used on different frequency bands of the useful signal is different.

 With reference to any one of the fifth aspect to the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation, the method further includes: a third sending module, configured to: before receiving the second signal, The user equipment sends the first configuration information, where the first configuration information is used to indicate a first transmission parameter value used on the first frequency band allocated to the user equipment, and the first frequency band is a frequency point having a first characteristic The first feature includes: a difference between a center frequency of the frequency resource occupied by the useful signal is less than or equal to a preset value; a fourth sending module, configured to send second configuration information to the user equipment, The second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated to the user equipment, where the second frequency band is composed of frequency points having a second feature, and the second feature includes: The difference between the center frequency of the frequency resource occupied by the useful signal is greater than the preset value.

 With reference to any one of the fifth aspect to the fifth possible implementation manner of the fifth aspect, in a seventh possible implementation, the method further includes: a fifth sending module, configured, before the sending the first signal, Transmitting, by the user equipment, the channel quality information, the reference channel signal, and the predetermined precoding matrix indication, to the user equipment, The precoding matrix indication and the channel state information - reference signal determination.

In combination with any of the seventh possible implementations of the fifth aspect, in the eighth possible implementation In the current mode, the method further includes: a first measurement module, configured to sequentially measure interference caused by the received signal when using each preset precoding matrix; and a first determining module, configured to minimize interference to the received signal The precoding matrix used by the transmission signal is determined as an optimal precoding matrix used for transmitting the first signal; and the second determining module is configured to use the precoding matrix indication indicating the using the optimal precoding matrix as a predetermined precoding Matrix indication.

 According to a sixth aspect of the present invention, a full duplex communication device is provided, including: a sixth sending module, configured to send a first signal; and a second receiving module, configured to receive a second signal, the second signal Included in the useful signal and the interference signal formed by the first signal passing through the air interface, the values of the transmission parameters used in different frequency bands of the useful signal are different; the second analog module is configured to simulate the first signal passing through An interference signal formed after the air interface is obtained to obtain an analog interference signal; and a restoration module is configured to delete the analog interference signal from the second signal to restore the useful signal.

 With reference to the sixth aspect, in a first possible implementation, the method further includes: a seventh sending module, configured to send first configuration information to the user equipment, where the first configuration information is used, before receiving the second signal, The first transmission parameter value used on the first frequency band allocated for the user equipment, the first frequency band is composed of frequency points having a first feature, and the first characteristic includes: occupying with the useful signal The difference between the center frequency of the frequency resource is less than or equal to a preset value; the eighth sending module is configured to send second configuration information to the user equipment, where the second configuration information is used to indicate that the user equipment is allocated a second transmission parameter value used on the second frequency band, the second frequency band being composed of frequency points having a second characteristic, the second characteristic comprising: a difference from a center frequency point of a frequency resource occupied by the useful signal Greater than the preset value.

 With reference to the sixth aspect, in a second possible implementation, the method further includes: a ninth sending module, configured to send, to the user equipment, a channel state information-reference signal and a predetermined precoding matrix indication; and a fifth receiving module, Receiving, by the user equipment, a channel quality indicator that is fed back by the user equipment, where the channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal; the first signal is determined according to the predetermined The precoding matrix indication and the channel quality indicator determination.

With reference to the second possible implementation manner of the sixth aspect, in a third possible implementation manner, the method further includes: a second measurement module, configured to sequentially transmit a signal by using each preset precoding matrix The fourth determining module is configured to determine a precoding matrix used for transmitting the signal with the least interference to the received signal as an optimal precoding matrix used for transmitting the first signal; And a module, configured to indicate, as a predetermined precoding matrix indication, a precoding matrix indication indicating that the optimal precoding matrix is adopted.

 According to a seventh aspect of the present invention, a full-duplex communication device is provided, including: a tenth sending module, configured to send a first signal, where the first signal is reported according to a predetermined precoding matrix and reported by a user equipment The channel quality indicator determines that the channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal; and the third receiving module is configured to receive the second signal, where the The second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface; a third analog module, configured to simulate an interference signal formed by the first signal after the air interface, to obtain an analog interference signal; And a module, configured to delete the analog interference signal from the second signal to restore the useful signal.

 With reference to the seventh aspect, in a first possible implementation, the method further includes: an eleventh sending module, configured to send a channel state information-reference signal and a predetermined precoding matrix indication to the user equipment; And a channel quality indicator for receiving the user equipment feedback, where the channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal.

 With reference to the seventh aspect, or the first possible implementation manner of the seventh aspect, in a second possible implementation, the method further includes: a third measurement module, configured to sequentially measure, when the signal is sent by using each preset precoding matrix, a sixth determining module, configured to determine a precoding matrix used for transmitting the signal with minimal interference to the received signal as an optimal precoding matrix used for transmitting the first signal; The precoding matrix indication indicating the adoption of the optimal precoding matrix is used as a predetermined precoding matrix indication.

 According to an eighth aspect of the present invention, a full-duplex communication apparatus is provided, including: a fourth receiving module, configured to receive a precoding matrix indication and a channel state information-reference signal sent by a network device; and an eighth determining module, And configured to determine a channel quality indicator according to the precoding matrix indication and the channel state information-reference signal, where the channel quality indicator is used by the network device to determine a transmission signal.

According to a ninth aspect of the embodiments of the present invention, a full duplex communication device is provided, including: a transmitter, configured to send a first signal, a first receiver, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface; And simulating an interference signal formed by the different frequency bands of the first signal after the air interface, to obtain an analog interference signal corresponding to each frequency band, and deleting analog interference corresponding to each frequency band from the second signal Signal to restore the useful signal.

 With reference to the ninth aspect, in a first possible implementation, the first processor is further configured to: send frequency resource configuration information to a user equipment, where the frequency resource configuration information includes frequency resource information and the L, The L is used by the user equipment to determine an interpretation manner of the frequency resource information, where the frequency resource information is used to indicate a resource block cluster allocated as a transmission resource of uplink data allocated to the user equipment, where L is positive Integer.

 With reference to the ninth aspect, or the first possible implementation manner of the ninth aspect, in a second possible implementation, the first transmitter is further configured to: before the receiving the second signal, to the user equipment Sending the first configuration information, where the first configuration information is used to indicate a first transmission parameter value used on the first frequency band allocated by the user equipment, where the first frequency band is composed of frequency points having a first feature, The first feature includes: a difference between a center frequency point of the frequency resource occupied by the useful signal is less than or equal to a preset value; and sending second configuration information to the user equipment, where the second configuration information is used Indicates a second transmission parameter value used on the second frequency band allocated for the user equipment, the second frequency band is composed of frequency points having a second characteristic, and the second characteristic includes: a frequency occupied with the useful signal The difference between the center frequency points of the resources is greater than the preset value.

 With the second possible implementation of the ninth to ninth aspects, in a third possible implementation, the first transmitter is further configured to: send a channel to the user equipment before the sending the first signal State information - a reference signal and a predetermined precoding matrix indication, and receiving a channel quality indication fed back by the user equipment, the channel quality indication being indicated by the user equipment according to the precoding matrix and the channel state information - The reference signal is determined.

With reference to the third possible implementation manner of the ninth aspect, in a fourth possible implementation, the first processor is further configured to: when sequentially transmitting a signal by using each preset precoding matrix, causing a received signal Interference matrix determined by the transmission signal with the least interference to the received signal is determined as an optimal precoding matrix used for transmitting the first signal; and the precoding matrix indication indicating the use of the optimal precoding matrix is used as a pre- Determined precoding matrix indication. According to a tenth aspect of the embodiments of the present invention, a full duplex communication device is provided, including: a second transmitter, configured to send a first signal; and a second receiver, configured to receive a second signal, the second signal Included in the useful signal and the interference signal formed by the first signal passing through the air interface, the values of the transmission parameters used in different frequency bands of the useful signal are different; the second processor is configured to simulate the first signal passing through The interference signal formed after the air interface is obtained to obtain an analog interference signal, and the analog interference signal is deleted from the second signal to restore the useful signal.

 With reference to the tenth aspect, in a first possible implementation, the second processor is further configured to: before the receiving the second signal, send first configuration information to the user equipment, where the first configuration The information is used to indicate a first transmission parameter value used on the first frequency band allocated for the user equipment, where the first frequency band is composed of frequency points having a first feature, and the first feature includes: The difference between the center frequency of the occupied frequency resource is less than or equal to a preset value; and, sending, to the user equipment, second configuration information, where the second configuration information is used to indicate the second frequency band allocated to the user equipment a second transmission parameter value used, the second frequency band is composed of frequency points having a second characteristic, and the second characteristic includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the default value.

 With reference to the tenth aspect or the first possible implementation manner of the tenth aspect, in a second possible implementation, the second transmitter is further configured to: send a channel to the user equipment before the sending the first signal State information - a reference signal and a predetermined precoding matrix indication, and a channel quality indicator that is received by the user equipment; the channel quality indication is indicated by the user equipment according to the precoding matrix and the channel state information Determining a reference signal; the first signal being determined in accordance with the predetermined precoding matrix indication and the channel quality indicator.

 With reference to the second possible implementation manner of the tenth aspect, in a third possible implementation manner, the first processor is further configured to: when sequentially transmitting a signal by using each preset precoding matrix, causing a received signal Interference matrix determined by the transmission signal with the least interference to the received signal is determined as an optimal precoding matrix used for transmitting the first signal; and the precoding matrix indication indicating the use of the optimal precoding matrix is used as a pre- Determined precoding matrix indication.

According to an eleventh aspect of the present invention, a full-duplex communication device is provided, including: a third transmitter, configured to send a first signal, where the first signal is according to a predetermined precoding matrix indication and a user equipment The reported channel quality indicator is determined, and the channel quality indicator is used by the The user equipment is determined according to the received precoding matrix indication and the channel state information-reference signal; the third receiver is configured to receive the second signal, where the second signal includes the useful signal and is passed by the first signal An interference signal formed after the air interface; a third processor, configured to simulate an interference signal formed by the first signal after the air interface, to obtain an analog interference signal, and to delete the analog interference signal from the second signal To restore the useful signal.

 With reference to the eleventh aspect, in a first possible implementation, the third transmitter is further configured to: before the sending the first signal, send the channel state information-reference signal and the predetermined pre- The coding matrix indicates, and receives the channel quality indication fed back by the user equipment, where the channel quality indication is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal.

 With reference to the eleventh aspect or the first possible implementation manner of the eleventh aspect, in a second possible implementation manner, the third processor is further configured to: sequentially measure, use each preset precoding matrix to send a signal Interference caused by the received signal; a precoding matrix used by the transmission signal having the least interference to the received signal is determined as an optimal precoding matrix used for transmitting the first signal; indicating that the optimal precoding matrix is used The precoding matrix indication is indicated as a predetermined precoding matrix.

 According to a twelfth aspect of the embodiments of the present invention, a communication terminal is provided, including: a fourth receiver, configured to receive a precoding matrix indication and a channel state information-reference signal sent by a network device; and a fourth processor, configured to: Determining a channel quality indicator according to the precoding matrix indication and the channel state information-reference signal, where the channel quality indicator is used by the network device to determine a transmission signal.

 The full duplex communication method and device provided by the embodiments of the present invention can simulate the interference signal formed by the transmitted signal through the air interface, because the received signal includes the useful signal and the interference signal, so according to the simulated interference signal, The useful signal is recovered from the received signal, thereby removing the interference of the transmitted signal, and demodulating more accurate useful information.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those of ordinary skill in the art without departing from the drawings. Figure 1 is a schematic diagram of communication of a full duplex device;

 2a is a schematic diagram of full-duplex communication interference disclosed in an embodiment of the present invention;

 2b is another schematic diagram of full-duplex communication interference disclosed in an embodiment of the present invention;

 2c is a flowchart of a full duplex communication method according to an embodiment of the present invention;

 3 is a flowchart of still another full duplex communication method according to an embodiment of the present invention; FIG. 4 is an example diagram of a resource block cluster;

 5 is a schematic diagram of a beneficial effect of a full-duplex communication method according to an embodiment of the present invention; FIG. 6 is a schematic structural diagram of a circuit for implementing a full-duplex communication method according to an embodiment of the present invention; A flowchart of a full-duplex communication method; FIG. 8 is a flowchart of still another full-duplex communication method according to an embodiment of the present invention; FIG. 9 is still another full-duplex communication method according to an embodiment of the present invention; FIG. 10 is a schematic diagram of a method for allocating different RS patterns for different frequency bands according to a full duplex communication method according to an embodiment of the present invention; FIG.

 FIG. 11 is a flowchart of still another full-duplex communication method according to an embodiment of the present invention; FIG. 12 is a flowchart of still another full-duplex communication method according to an embodiment of the present invention; FIG. 14 is a schematic structural diagram of a full-duplex communication device according to an embodiment of the present invention; FIG. 15 is a schematic diagram of a full-duplex communication device according to an embodiment of the present invention; FIG. 16 is a schematic structural diagram of still another full-duplex communication device according to an embodiment of the present invention; FIG. 17 is a schematic structural diagram of another full-duplex communication device according to an embodiment of the present invention; A schematic structural diagram of still another full-duplex communication device disclosed in the embodiment of the invention. detailed description

The full duplex communication method disclosed in the embodiment of the present invention may be applied to the following scenario: The network device sends scheduling signaling to the user equipment, where the frequency resource information allocated for the user equipment is included, for example, in the LTE system, for the uplink transmission, The network device sends a scheduling signaling to the user equipment (UE) through a physical downlink control channel (PDCCH), where the scheduling signaling includes, for the UE, a physical uplink shared channel (Physical Uplink Shared Channel, PUSCH) transmitting resource block (RB) information allocated by the uplink signal, and indicating the RB information after receiving the UE The uplink data is sent by the PUSCH on the RB, and the network device receives the uplink data sent by the UE on the RBs.

 For the downlink transmission, the network device sends the scheduling signaling to the UE in the PDCCH, where the network device allocates the RB information allocated by the downlink signal to the UE, and sends the data to the UE through the Physical Downlink Shared Channel (PDSCH). The UE first acquires the content on the PDCCH, and then receives the data on the PDSCH on the corresponding RB according to the RB information included in the PDCCH. In an LTE system, one RB corresponds to 12 subcarriers, and the RB may be a Physical Resource Block (PRB) or a Virtual Resource Block (VRB) in an LTE system.

 In the embodiment of the present invention, the network device may be implemented as a base station (BS), an access point (AP), a remote radio equipment (RRE), and a remote radio port (Remote Radio). Head, RRH), Remote Radio Unit (RRU), Relay Node, etc. The relationship between the network device and the cell is not limited, and may be one network device corresponding to one or more cells, or one cell corresponding to one or more network devices. The sending or receiving operation of the network device may be a direct behavior of the network device, or the network device may control whether to send or receive between the device connected to the wired or wireless device.

 For example, Figure 2a shows a scenario for full-duplex communication:

 The network device (base station) transmits a signal S to UE2, and at the same time, receives a useful signal 1 transmitted by UE1. Then, the signal S1 formed by the signal S transmitted by the network device after passing through the air interface will cause interference to the useful signal R received by the signal.

 For another example, Figure 2b shows another scenario for full duplex communication:

 The UE receives the useful signal R transmitted by the network device 2, and at the same time, the UE transmits a signal S to the network device 1. The signal SI formed by the signal S sent by the UE after passing through the air interface may cause interference to the useful signal R received by the UE.

In order to obtain more useful information, a full-duplex communication method disclosed in the embodiment of the present invention is applied to a full-duplex device, which may be a network device or a user device, in the full double The equipment includes at least one transmitting antenna and one receiving antenna. As shown in FIG. 2c, the method described in this embodiment includes: S201: sending a first signal;

 Typically, the first signal is sent through the transmit antenna.

 Taking the scene shown in Fig. 2a or Fig. 2b as an example, the first signal is the signal S.

 S202: Receive a second signal.

 Typically, the second signal is received by the receiving antenna. Because of the characteristics of the receiving antenna, while receiving the useful signal, it also receives the signal formed by the first signal from the transmitting antenna after passing through the air interface, and the signal is an interference signal for the useful signal. Therefore, the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface.

 The air interface in the embodiment of the present invention may refer to an air interface experienced from the transmitting antenna to the receiving antenna.

 Taking the scene shown in Fig. 2a or Fig. 2b as an example, the second signal includes the signal R and the signal Sl.

S203: Simulate interference signals formed by different frequency bands of the first signal after the air interface respectively, to obtain analog interference signals corresponding to each frequency band.

 When a signal propagates in space (ie, an air interface), it will be distorted (eg, attenuated, phase shifted, etc.). Especially in a wideband system, the distortion of the signal at different frequencies or frequency bands is not the same. Therefore, the first signal is simulated separately. The analog interference signals obtained by the interference signals corresponding to different frequency bands are close to the real interference signals received by the receiving antenna and causing interference to the useful signals.

 S204. Delete an analog interference signal corresponding to each frequency band from the second signal, to restore the useful signal.

 Deleting the interfering signal from the second signal makes the demodulated useful information more accurate. In the method described in this embodiment, the interference signal formed by the first signal is simulated in a frequency band, and the analog interference signal corresponding to each frequency band is deleted from the second signal to restore the useful signal, so that the demodulation by the useful signal can be improved. The accuracy of useful information.

 Further, each of the above frequency bands may be specifically a frequency band corresponding to a frequency resource of a useful signal.

 Because the simulated interference signal is an interference signal formed on the frequency resource of the useful signal, it is closer to the real interference signal received by the receiving antenna and causing interference to the useful signal, so it can be more in the second signal. The interference signal is completely removed, thereby further improving the accuracy of demodulating useful information.

More specifically, the above “simulating the different frequency bands of the first signal respectively through the air port shape The resulting interference signal can include the following steps:

 The interference signals formed by the different frequency bands of the first signal after the air interface are simulated according to the measured distortion variables of the respective frequency bands.

 This article will describe how to measure the distortion corresponding to each frequency band. Another full-duplex communication method disclosed in the embodiment of the present invention can be applied to a full-duplex device. The full-duplex device can be a network device or a user device. As shown in FIG. 3, the method includes: S301: Sending First signal

 S302: Receive a second signal, where the second signal includes a useful signal and a dry signal formed by the first signal passing through the air interface;

 S303: divide the N resource block clusters occupied by the useful signal into M sets, and the difference between the center frequency points of the adjacent resource block clusters in each set is within a preset range; the N is a positive integer , M is a positive integer, and M is less than or equal to N.

 A Resource Block cluster (RB cluster ) is a collection of frequency-contiguous (at least two) RBs.

 For example, as shown in FIG. 4, the useful signal occupies four resource block clusters, which are respectively a first resource block cluster including RBs numbered 3, 4, and 5, including RBs numbered 9 and 10. A second resource block cluster, a third resource block cluster including RBs numbered 32, 33, 34, and 35, and a fourth resource block cluster numbered 40, 41, 42, 43, and 44.

 As described above, the network device sends scheduling signaling to the user equipment, including frequency resource information, such as Resource Block (RB) information, allocated for the user equipment. Therefore, both the network device and the user equipment already know the cluster of resource blocks occupied by the useful signal before the useful signal is transmitted.

 In some scenarios, a network device can act as a sender of a useful signal and a user device can act as a recipient of a useful signal. In some scenarios, the network device can act as a recipient of the useful signal and the user device can act as the sender of the useful signal.

Taking the scenario shown in FIG. 2a as an example, when the full-duplex device is the UE1, as a sender of the useful signal, the resource block cluster occupied by the useful signal can be obtained according to the notification of the network device. And when the full-duplex device is a network device (when the full-duplex device is the receiver of the useful signal), It is a resource block cluster allocated by the network device for UE1, so the network device can directly determine the resource block cluster occupied by the useful signal.

 Optionally, in this embodiment, the dividing the N resource block clusters into M sets may include the following process: Sorting the N resource block clusters according to a frequency, to obtain a first sorting result, where the N is The resource block clusters are divided into M sets according to the first sorting result (the M sets correspond to M different frequency bands), and the difference between the center frequency points of adjacent resource block clusters in each set or any two The difference between the center frequency points of the resource block clusters is within a preset range.

 In the present embodiment, the center frequency of the set refers to the center frequency of the range of frequency values included in the set, that is, the average of the maximum frequency value and the minimum frequency value included in the set.

 For example, the center frequency of the first set in FIG. 4 is the center frequency of the frequency value included in the RBs numbered 3 to 10, that is, the lower limit frequency value of the RB numbered 3 and the upper limit frequency of the RB numbered 10 The average of the values.

 The preset range may be determined in advance according to requirements. For example, the preset range is a bandwidth corresponding to 6 RBs, and N=4 and M=2 are assumed. Taking the four resource block clusters shown in FIG. 4 as an example, the result of sorting according to the frequency size is a first resource block cluster, a second resource block cluster, a third resource block cluster, and a fourth resource block cluster, where The difference between the center frequency of the first resource block cluster and the center frequency of the second resource block cluster is equivalent to the bandwidth of 5.5 RBs, and the first resource block cluster and the second resource block cluster are grouped into the same set. The difference between the center frequency of the second resource block cluster and the third resource block cluster is equal to the bandwidth of the 24 RBs, which is much larger than the preset range, and the second resource block cluster and the third resource block cluster are different. set.

 According to the above sequence, the four resource block clusters shown in FIG. 4 may be divided into two sets (the first set and the second set): the first set includes the first resource block cluster and the second resource block cluster, and the second The third resource block cluster and the fourth resource block cluster are included in the set.

 S304: respectively measure a distortion variable of the first signal before and after the air interface at a center frequency of each set;

 The distortions at the center frequency of each set are the distortions corresponding to the respective measured bands.

There are several ways to measure the distortion of the first signal before and after the air gap at the center frequency of each set. For example, the training sequence may be transmitted in advance by using a transmitting antenna, and the training sequence may occupy the foregoing N resource block clusters like the useful signal, or the training sequence occupies P resource block clusters, and the P resource block clusters include the foregoing N resource block clusters.

 The training sequence ', the received training sequence' is received by the receiving antenna and transmitted through the air interface. Comparing the training sequence 'and the training sequence, you can get the center frequency of each frequency band before and after the air interface

Distortion variables (that is, at the center frequency of each set).

 The obtained distortion can be used as the distortion of the first signal before and after the air interface at the center frequency of each set.

 To further improve the measurement accuracy of the distortion variable, other network devices may be notified or the UE may be notified to maintain a silent or low power transmission signal on the resource block cluster that transmits the training sequence.

 For another example, after the first signal (S) is transmitted, the influence of the useful signal (R) may be ignored, and the received second signal (R+S 1 ) may be regarded as a signal that has been distorted after being transmitted through the air interface ( S 1 ), comparing the second signal with the first signal, obtaining a distortion variable at a center frequency point of each frequency band (that is, at a center frequency point of each set) before and after the air interface. The resulting distortion variable can be used for the next simulated interference signal. That is, the distortion obtained by the nth full-duplex communication measurement is used for the analog interference signal in the n+1th full-duplex communication.

 S305: Simulate, according to the distortion variable corresponding to each frequency band, an interference signal formed by the different frequency bands of the first signal after the air interface, and obtain an analog interference signal corresponding to each frequency band.

 In this embodiment, the distortion of the first signal before and after the air interface at a central frequency point of a certain set (band) is approximated as a distortion of the first signal in the frequency band. Therefore, when dividing the set, the difference between the center frequency points of the adjacent resource block clusters in each set or the difference between the center frequency points of any two resource block clusters needs to be within a preset range, so that The error caused by using this approximation is guaranteed to be within acceptable limits.

 Alternatively, in other embodiments of the present invention, the distortion corresponding to each frequency band may be set to a fixed value without measurement, and the interference signal corresponding to each frequency band may be directly simulated by using the set distortion variable.

 In other embodiments of the present invention, the distortion amount in all of the above embodiments may include at least one of an attenuation amount and a phase shift amount.

Correspondingly, the above “simulating the different frequency bands of the first signal through the air interface The scramble signal "may further include attenuating the different frequency bands of the first signal by the attenuation amount and/or phase shifting the different frequency bands of the first signal by the phase shift amount, thereby obtaining an analog interference signal corresponding to each set.

 For example, the frequency band corresponding to the first set is referred to as the first frequency band, and the frequency band corresponding to the second set is referred to as the second frequency band. The first signal can be considered to contain two sub-signals, one of which is located in the first frequency band and the other sub-signal is in the second frequency band. Assume that the attenuation and phase shift measured at the center frequency of the first set are (XI, Y1), and the attenuation and phase shift measured at the center frequency of the second set are (X2, Y2). Transducing the sub-signal of the first signal in the first frequency band XI and shifting the phase Y1 to obtain the first interfering signal on the first set; and attenuating the sub-signal of the first signal in the second frequency band by Χ2 and shifting the phase Υ2, a second interference signal on the second set is obtained.

 It should be noted that this is not ruled out: The amount of attenuation has been measured before leaving the factory and the amount of attenuation is solidified in full-duplex equipment. Or, it is found that the attenuation is not large before being measured at the factory, and it is not necessary to measure the attenuation amount and subsequently attenuate the first signal. In this case, the distortion in steps S304, S305 may not include the amount of attenuation but includes the amount of phase shift.

 Conversely, if the phase shift amount has been measured before leaving the factory, the phase shift amount is solidified in the full duplex device. Or, the amount of phase shift measured before leaving the factory is not large, and the phase shift amount is not required to be measured and the phase shift processing is performed on the first signal. The distortion in steps S304 and S305 may not include the phase shift amount but includes attenuation. the amount.

 Furthermore, in other embodiments of the invention, the distortions in all of the above embodiments may also include a frequency shift amount.

 Correspondingly, the above “simulating the interference signal formed by the different frequency bands of the first signal after passing through the air interface” may further comprise performing frequency shift processing on different frequency bands of the first signal according to the frequency shift amount.

 S306: Delete the analog interference signal corresponding to each frequency band from the second signal, to restore the useful signal.

In a specific implementation, the analog interference signal corresponding to each frequency band may be directly deleted from the second signal. The second signal can also be divided into multiple frequency bands, and the analog interference signals corresponding to the frequency band are deleted by frequency band. That is, the simulated interference signals corresponding to the set may be deleted from the signals on the resource block clusters of the second signal in each set, respectively, to obtain a useful signal. For example, deleting the first interference signal on the first resource block cluster and the second resource block cluster, and deleting the second interference resource on the third resource block cluster and the fourth resource block cluster Interference signal.

 In one prior art, when simulating an interfering signal, the frequency band is not distinguished and the same distortion is used throughout the system band. For a wideband system, the received useful signal occupies more frequency bands, that is, the bandwidth of the useful signal is larger. Therefore, if a fixed distortion is used, the signal transmitted from the first antenna is processed and the receiving antenna is simulated. The received interference signal and then the interference cancellation processing on the interference signal may cause more residual interference signals on the edge frequency resources of the useful signal. As shown by the solid line in FIG. 5, the farther away from the center frequency point, the residual The more interference signals there are.

 However, according to the technical solution provided by all the foregoing embodiments of the present invention, the frequency resources of the useful signal can be divided into different sets (bands), and the interference signals are deleted on each set, and the experiment proves that the interference can be effectively reduced. The residual amount of the signal, as shown in FIG. 5, the dotted line portion respectively represents the interference residual after the interference deletion on the two sets shown in FIG. 4, and the solid line portion is the interference residual after the interference deletion using the fixed distortion variable, The arrows in the up and down direction indicate the amount of interference residual that can be reduced by the method described in this embodiment.

 It should be noted that, in practical applications, an attenuator and a phase shifter can be used to simulate an interference signal. As shown in FIG. 6, the signal to be transmitted (that is, the first signal) is divided into two paths by using a frequency divider, and respectively simulated. The interference signal on the first set and the interference signal on the second set.

 As mentioned above, M can be equal to N (that is, the interference signal on each resource block cluster is simulated) or less than N. When M is equal to N, the interference signal is deleted most thoroughly, but the complexity of the system is high. In practical applications, the residual amount of the interference signal and the complexity of the system can be comprehensively considered, and the most suitable M value is selected. Another full-duplex communication method disclosed in the embodiment of the present invention is applied to a network device, as shown in FIG. 7, and includes:

 S701: Send frequency resource configuration information to the user equipment, where the frequency resource configuration information includes frequency resource information and L;

 The L represents the number of sets into which the frequency resources to be allocated are divided. L also indicates the processing power of the network device, which indicates that the network device can process up to L resource block clusters.

The L is used by the user equipment to determine an interpretation manner of the frequency resource information, where the frequency is The rate resource information is used to indicate a resource block cluster allocated as a transmission resource of the uplink data allocated to the user equipment. The L is a positive integer.

 More specifically, the frequency resource information is 7 bits in length.

 The value of L is different, and the resource block cluster indicated by the frequency resource information is different.

 For example, assume that the frequency resource information is specifically 0101010, and L can be equal to 1, 2, 3, 4. When L=l, 0101010 represents resource block clusters RB0-RB3 and resource block clusters RB8-RB9; when L=2, 0101010 represents resource block clusters RB8-RB10 and resource block clusters RB22-RB25; when L=3, 0101010 characterization resource block clusters RB0-RB3 and resource block clusters RB16-RB18; when L=4, 0101010 represents resource block clusters RB12-RB15 and resource block clusters RB39-RB41.

 In the prior art, the value of the user equipment L is not notified. After receiving the frequency resource information, the UE will try one by one. For example, the UE will try to interpret 0101010 by L=l, after failure, try to interpret 0101010 by L=2, and so on.

 After the solution provided by this embodiment is used, since the value of L is notified, the UE can directly determine which way to interpret 0101010, without having to try one by one, which can reduce the complexity.

 Taking the scenario shown in FIG. 2a as an example, UE1 can obtain a useful signal (uplink data) on the resource block cluster after obtaining the resource block cluster as the transmission resource of the uplink data according to the L interpretation frequency resource information. The useful signal will be received by the network device in step S703 described below.

 S702: Send a first signal.

 S703: Receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 S704: Measure a distortion variable in each frequency band of the useful signal after the first signal passes through the air interface;

 Please refer to the above description for related content.

 S705: Simulate, according to the measured distortion variables of each frequency band, an interference signal formed by different frequency bands of the first signal after the air interface, and obtain an analog interference signal corresponding to each frequency band.

 S706: Deleting the analog interference signal corresponding to each frequency band from the second signal to restore the useful signal.

In other embodiments of the present invention, before transmitting the frequency resource configuration information including the L, all the foregoing embodiments may further include the following steps: The frequency resources to be allocated are sorted according to the frequency, and the second sorting result is obtained. The frequency resources to be allocated are divided into L sets according to the second sorting result, and the central frequency points of the L sets are respectively P1. ..PL.

 For example, there are 50 RBs to be assigned (numbered 1-50). The 50 frequency resources are divided into two sets, the first set includes RBs numbered 1 to 25, the second set includes RBs numbered 26 to 50, and the center frequency of the first set is the center of the RB numbered 13 The frequency point, the center frequency of the second set is the center frequency of the RB numbered 38.

 In allocating resource block clusters to the sender of the useful signal, at least one resource block cluster combination may be selected from each of the L sets to obtain the aforementioned N resource block clusters. For example, L=2, N=4, then two resource block clusters can be selected from the first set (the first set includes RBs numbered 1 to 25), and the second set includes the number Two resource block clusters are selected for the UE from 26 to 50 RBs.

 The aforementioned N resource block clusters occupied by the useful signal are divided into M sets, and the N resource block clusters may be divided into M sets according to the set to which each resource block cluster belongs.

 For example, assume that four resource block clusters are respectively a first resource block cluster including RBs numbered 3, 4, and 5, and a second resource block cluster including RBs numbered 9 and 10, including numbers 32, 33, and 34. And a third resource block cluster of RBs of 35 and, and including a fourth resource block cluster numbered 40, 41, 42, 43, and 44. The first resource block cluster and the second resource block cluster belong to the first set (including the RBs of numbers 1 to 25), and the first resource block cluster and the second resource block cluster are divided into the same set, and the third The resource block cluster and the fourth resource block cluster belong to the second set (including the RBs of numbers 26 to 50), and the third resource block cluster and the fourth resource block cluster are divided into the same set.

 In the case of N=M=L, the corresponding distortion variable at the center frequency point of each resource block cluster can be measured, thereby simulating the corresponding interference signal of the first signal on the resource block cluster.

Compared with the previous embodiment, the flexibility of allocating frequency resources to the user equipment is reduced in this embodiment, but the network device does not need to divide the resource block clusters of the useful signal every time when performing interference deletion, thereby enabling Reduce the complexity of network devices. In order to obtain useful information more accurately, in addition to designing the manner of interference deletion, in other embodiments of the present invention, the transmitted first signal may also be designed to enable the first signal to be sent. The interference caused by the useful signal becomes small.

 For example, the first signal may be: according to a predetermined precoding matrix indication

(Precoding Matrix Indicator, PMI) and the user equipment (such as the scenario shown in FIG. 2a, the user equipment in this embodiment specifically refers to the channel quality indicator (CQI) reported by the UE2). The channel quality indicator is determined by the user equipment according to the received PMI and Channel State Information-Reference Signal (CSI-RS).

 Optionally, in this embodiment, before the first signal is sent, the network device may sequentially measure interference caused by the received signal by using a preset precoding matrix (PM), and the interference will be caused to the received signal. The PM used for the transmission signal with the least received signal interference is determined as the optimal PM for transmitting the first signal, and the PMI indication indicating the optimal PM is used as the predetermined PMI and sent to the user equipment, so that the user equipment is based on the PMI. And the CSI-RS determines the CQI and reports it to the network device.

 It should be noted that in the existing communication process, the network device does not specify the optimal PM. In the existing communication process, the network device sends a CSI-RS to the UE, and the UE determines the precoding matrix and the CQI and feeds back to the network device.

 In this embodiment, the base station indicates the optimal precoding matrix to the UE, so that the UE does not need to determine the precoding matrix autonomously, and only needs to determine the CQI according to the optimal precoding matrix specified by the base station and feedback.

 After the UE feeds back the CQI, the network device may transmit the first signal according to the optimal PM and the CQI fed back by the UE.

 Of course, since the network device not only provides services for one UE, the network device may not necessarily transmit the first signal according to the optimal PM and the CQI fed back by the UE due to global considerations or other trade-offs.

The design of the transmitted first signal can be combined with the embodiment shown in FIG. 2c, FIG. 3 or FIG. 7 and the like, and can also be combined with the interference deletion method in the prior art to improve the demodulation of useful information. The accuracy. The foregoing describes the design of the method of interference cancellation, and the first signal transmitted. the design of. In addition, useful signals can be designed to enhance the anti-interference ability of useful signals, so that useful information can be obtained more accurately.

 Therefore, the embodiment of the present invention discloses a full-duplex communication method, which is applied to a full-duplex device. The full-duplex device may be a network device. As shown in FIG. 8, the method may include:

 S801: sending a first signal;

 S802: Receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface, where values of transmission parameters used in different frequency bands of the useful signal are different;

 In the prior art, the useful signal transmitted by the user equipment usually only uses the same transmission parameter value on the frequency resource. The interference signals of different frequency bands have different removal effects. Therefore, the interference signal residual at the edge frequency is large, that is, the edge frequency band is more susceptible to interference signals.

 In this embodiment, the values of the transmission parameters used in different frequency bands of the useful signal are different. Therefore, the parameter values with better anti-interference can be used in the frequency band susceptible to interference, so as to simulate a more accurate interference signal. , thereby improving the accuracy of the demodulated useful information.

 S803: Simulate an interference signal formed by the first signal passing through the air interface to obtain an analog interference signal.

 More specifically, the interference mode can be simulated by using the analog mode in the prior art, and the analog mode provided by any of the foregoing embodiments of the present invention can be used to obtain the corresponding analog interference signal of each frequency band. Do not repeat them.

 S804: The analog interference signal is deleted from the second signal to restore the useful signal.

 The design of the transmitted useful signal can be combined with any of the embodiments of the present invention, as well as with prior art interference removal methods. Another full-duplex communication method provided by the embodiment of the present invention can be applied to a network device. As shown in FIG. 9, the method includes:

S901: The network device sends the first configuration information to the user equipment, where the first configuration information is used to indicate a first transmission parameter value used on the first frequency band allocated by the user equipment; S902: the network device sends the The user equipment sends second configuration information, where the second configuration information is sent The information is used to indicate the second transmission parameter value used on the second frequency band allocated to the user equipment. In this embodiment, the first frequency band is composed of frequency points having the first feature, and the first feature includes: The difference between the center frequency points of the frequency resources occupied by the useful signal is less than or equal to a preset value; the second frequency band is composed of frequency points having the second feature, and the second characteristic includes: occupying with the useful signal The difference between the center frequency points of the frequency resources is greater than the preset value.

 That is to say, the first frequency band may be the intermediate frequency band of the frequency band resource occupied by the useful signal, and the second frequency band may be the edge frequency band of the frequency band resource occupied by the useful signal. In general, the edge band is more susceptible to interference from interfering signals than the intermediate band.

 The transmission parameters in the embodiment and the embodiment shown in FIG. 8 may include: a Modulation and Coding Scheme (MCS), or a Power Control (PC) parameter, or a reference signal (Reference Signal, RS). ) Pattern.

 In general, high-order MCSs have higher transmission efficiency, can reliably transmit more information when weakly interfered, and lower-order MCSs have higher reliability and reliable communication when subjected to strong interference. High transmission power has higher transmission reliability and can reliably transmit information when it is interfered. Therefore, when the interference is high, the corresponding higher transmission power can ensure reliable transmission. For the RS pattern, different RS patterns usually correspond to different RS densities; the lower the density of RS, the smaller the overhead of RS, the more resources are used to transmit useful information, the transmission efficiency is higher, and the density of RS is higher. The higher the overhead of RS, the stronger the anti-interference ability, which leads to higher reliability.

 In this embodiment, the first configuration information and the second configuration information may be sent according to the characteristics of the foregoing parameters, respectively indicating the transmission parameter value used by the intermediate frequency band and the transmission parameter value used by the edge frequency band, so that the transmission efficiency of the edge frequency band is lower than the middle. The transmission efficiency of the frequency band, or the anti-interference ability of the edge frequency band is higher than the anti-interference ability of the intermediate frequency band.

 For example, if the RBs numbered 21 to 30 are allocated to the user equipment, the first configuration information may be used to indicate that the intermediate frequency band (RBs of 24 to 27) allocated for the user equipment uses 16QAM, and the coding rate is 5/6. The second configuration information is used to indicate that the MCS used for the edge bands (21 to 23 and RBs of 28 to 30) allocated for the user equipment is QPSK, and the coding rate is 1/2.

For another example, the first configuration information is used to indicate that the power adjustment amount used for the intermediate frequency band allocated by the user equipment is 3 dB, and the second configuration information is used to indicate the edge allocated for the user equipment. The power adjustment used by the frequency band is OdB, that is, the transmission power of the edge frequency band is 3 dB higher than the transmission power of the intermediate frequency band.

 For another example, as shown in FIG. 10, the first configuration information is used to indicate that the intermediate frequency band allocated for the user equipment uses the first RS pattern, and the edge frequency band uses the second RS pattern, where the RS pattern represents the RE for transmitting the RS. Specific subcarriers and symbols, wherein a symbol corresponding to one subcarrier in time and a subcarrier on a frequency is called a resource element (Resource Element, RE), which may also be referred to as a time-frequency grid point; The RS is only present in a part of the subcarriers of the second symbol, and the intermediate frequency band is an RB numbered 24 to 27. In these RBs, the RE for transmitting the RS includes only the 4th, 9th on the second symbol. The sub-carriers are RBs numbered 21 to 23 and numbered 28 to 30. In these RBs, the RE used to transmit the RS includes only the 2nd, 5th, 8th, and 11th subcarriers on the second symbol. . Thus, as described above, the interference received when transmitting signals in the intermediate frequency band is low, so that even if the RE used for transmitting the RS is small, sufficient channel estimation accuracy can be ensured; when the signal is transmitted on the edge band, The interference is high, so more REs are used to transmit the RS to ensure a sufficiently good channel estimation accuracy. The accuracy of the channel estimation can be reflected by the error of the channel estimation. For example, the Mean Square Error (MSE) of the channel estimation below 0.1 indicates that the channel estimation accuracy is good enough.

 S903: The user equipment transmits uplink data, that is, a useful signal, according to the indication of the first configuration information and the second configuration information.

 When configuring the transmission parameters to the user equipment, different configuration values are used to configure different parameter values for different frequency resources, so that the useful signal sent by the user equipment can use weak anti-interference but transmission efficiency on the frequency resource that is easy to delete the interference signal. Higher transmission parameter values, and more interference-resistant transmission parameter values can be used on frequency resources with more residual residual residuals, so that the network device can receive more interference signals and useful signals sent by the user equipment. Accurately demodulate useful information.

 S904: The network device sends the first signal.

 S905: The network device receives the second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

The useful signal in step S905 is formed after the useful signal sent by the user equipment in step S903 is passed through the air interface. S906: The network device simulates an interference signal formed by the first signal after passing through the air interface. More specifically, the interference mode can be simulated by using the analog mode in the prior art, and the analog mode provided by any of the foregoing embodiments of the present invention can be used to obtain the corresponding analog interference signal of each frequency band. Do not repeat them.

 S907: The analog interference signal is deleted from the second signal to restore the useful signal.

 After the interference cancellation of the second signal results in a useful signal, since the useful signal uses different transmission parameter values in different frequency bands, the network device needs to divide the obtained useful signal to obtain two signals, one of which has a useful signal. Located in the first band and the other in the second band. The useful signal located in the first frequency band is demodulated using a demodulation method corresponding to the first transmission parameter value described above. The useful signal in the second frequency band is demodulated using a demodulation method corresponding to the second transmission parameter value described above.

 Taking MCS as an example, if the MCS used in the first frequency band is 16QAM and the MCS used in the second frequency band is QPSK, the useful signal in the first frequency band is demodulated by using a demodulation method corresponding to 16QAM, and the corresponding signal is used in accordance with QPSK. The demodulation method demodulates the useful signal located in the second frequency band.

 Optionally, in the foregoing embodiment shown in FIG. 8 or FIG. 9 , the first signal may be: a signal determined according to a predetermined PMI and a CQI reported by the user equipment, where the CQI is determined by the user equipment. The received PMI and CSI-RS are determined.

 Alternatively, in the embodiment shown in FIG. 8 or FIG. 9 above, before transmitting the first signal, the network device may further measure, when sequentially transmitting, a signal from the transmitting antenna using each preset PM, to the receiving antenna. Receiving the interference caused by the received signal, determining the PM used for the transmission signal with the least interference to the received signal as the optimal PM used for transmitting the first signal, and indicating the PMI using the optimal PM as the predetermined PMI And sending the user equipment to the user equipment, so that the user equipment determines the CQI according to the PMI and the CSI-RS and reports the CQI to the network device, and the network device sends the first signal according to the PMI and the CQI.

The design of the useful signal for transmission according to the embodiment shown in FIG. 9 can be combined with any of the embodiments of the present invention, and can also be combined with the interference deletion method of the prior art. Another full-duplex communication method disclosed in the embodiment of the present invention can be applied to a network device. As shown in FIG. 11, the method includes:

 S1101: Send a first signal, where the first signal is determined according to a predetermined Precoding Matrix Indicator (PMI) and a Channel Quality Indicator (CQI) on the user equipment, where the CQI is determined by The user equipment determines, according to the received precoding matrix indication PMI and a channel state information-reference signal (CSI-RS);

 S1102: Receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 S1103: Simulate an interference signal formed by the first signal after passing through the air interface.

 S1104: The analog interference signal is deleted from the second signal to restore the useful signal.

 In the prior art, the network device sends a CSI-RS to the user equipment, the user sets the CSI-RS, determines the PMI, and sends the PMI to the network device, where the network device sends the first using the precoding matrix indicated by the PMI. signal.

 Since the SINR of the transmitted signal is different by using different precoding matrix transmission signals, in the method described in this embodiment, the PMI is no longer determined by the user equipment but is determined by the network device, so the network device may be reduced. The small transmitted signal interferes with the received useful signal as a starting point, and determines the precoding matrix used by the transmitted signal, thereby achieving the effect of reducing the interference of the transmitted signal on the received useful signal. Another full-duplex communication method disclosed in the embodiment of the present invention can be applied to a user equipment, as shown in FIG. 12, including:

 S1201: Receive a precoding matrix indication and a channel state information-reference signal sent by the network device.

 S1202: Determine, according to the precoding matrix indication and the channel state information-reference signal, a channel quality indicator, where the channel quality indicator is used by the network device to determine a sending signal.

 Optionally, the method may further include:

 S1203: Send the channel quality indication to the network device.

In the method described in this embodiment, the user equipment no longer determines the PMI but sends the network device according to the network device. The PMI and CSI-RS determine the CQI, which makes the selection of the PMI more favorable for reducing the interference of the transmitted signal. Another full-duplex communication method disclosed in the embodiment of the present invention, as shown in FIG. 13, includes: S1301: The network device sequentially measures interference caused by the received signal when transmitting signals by using each preset precoding matrix;

 S1302: The network device determines, by using a precoding matrix, a precoding matrix used by the transmission signal with the least interference to the received signal as an optimal precoding matrix used for transmitting the first signal.

 S1303: The network device indicates the precoding matrix indication that uses the optimal precoding matrix as a predetermined PMI;

 S1304: The network device sends channel state information-reference signal and the PMI to the user equipment.

S1305: The user determines the CQI according to the CSI-RS and the PMI, and reports the CQI to the network device.

 S1306: The network device sends the first signal according to the PMI and the CQI.

 Specifically, the network device may determine the MCS according to the CQI, and use the coding matrix indicated by the PMI and the MCS to transmit the first signal.

 S1307: The network device receives a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 S1308: The network device simulates an interference signal formed after the first signal passes through the air interface.

 S1309: The analog interference signal is deleted from the second signal to restore the useful signal.

 In the method of the embodiment, the network device measures interference of the received signal by using different precoding matrix transmission signals, determines a precoding matrix with the least interference, and transmits the signal according to the precoding matrix, thereby reducing the received signal. The effect of the demodulation of the useful signal is thus improved. Correspondingly, the embodiment of the present invention further discloses a full-duplex communication device, which may be applied to a network device of a communication network, and may also be applied to a UE. As shown in FIG. 14, the device includes: a first sending module. 1401, configured to send the first signal;

The first receiving module 1402 is configured to receive a second signal, where the second signal includes a useful message And an interference signal formed by the first signal passing through the air interface;

 The first analog module 1403 is configured to respectively simulate an interference signal formed by different frequency bands of the first signal after the air interface, and obtain an analog interference signal corresponding to each frequency band.

 The first restoration module 1404 is configured to delete an analog interference signal corresponding to each frequency band from the second signal to restore the useful signal.

 Optionally, the first analog module 1403 may be specifically configured to: according to the measured distortion variable corresponding to each frequency band, the simulation station is configured to simulate an interference signal formed by the different frequency bands of the first signal after the air interface An interference signal formed by the different frequency bands of the first signal after passing through the air interface.

 Alternatively, the first analog module 1403 may further include a first analog unit, configured to simulate, according to the measured distortion corresponding to each frequency band, an interference signal formed by different frequency bands of the first signal after passing through the air interface.

 Optionally, the full duplex communication device may further include:

 a dividing module, configured to divide the N resource block clusters occupied by the useful signal into M sets, where a difference between central frequency points of adjacent resource block clusters in each set is within a preset range, the N a positive integer, the M is a positive integer, and M is less than or equal to N;

 a first measurement module, configured to separately measure distortions of the first signal before and after the air interface at a center frequency of each collection;

 The distortion variable at the center frequency of each set is the distortion corresponding to each of the measured frequency bands.

 Further, optionally, in this embodiment, the dividing module may specifically include: a sorting subunit, configured to sort the N resource block clusters according to a frequency, to obtain a first sorting result;

 The dividing subunit is configured to divide the N resource block clusters into M sets according to the sorting result.

The device described in this embodiment can simulate the interference signal generated by the transmission signal of the full-duplex device to the received signal, whether it is applied to the network device or the UE, thereby removing the interference signal from the received signal, and improving the demodulation. The accuracy of the useful information. The embodiment of the invention further discloses a full-duplex communication device, which can be applied to a network device of a communication network, as shown in FIG.

 a second sending module 1501, configured to send frequency resource configuration information to the user equipment, where the frequency resource configuration information includes frequency resource information and L, where the L is used by the user equipment to determine an interpretation manner of the frequency resource information, where The frequency resource information is used to indicate a resource block cluster allocated to the user equipment as a transmission resource of uplink data, where L is a positive integer;

 The first sending module 1502 is configured to send the first signal.

 The first receiving module 1503 is configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 The first analog module 1504 is configured to respectively simulate an interference signal formed by different frequency bands of the first signal after the air interface, and obtain an analog interference signal corresponding to each frequency band;

 The first restoration module 1505 is configured to delete an analog interference signal corresponding to each frequency band from the second signal, to restore the useful signal.

 Optionally, the full duplex communication device may further include:

 a sorting module, configured to sort frequency resources to be allocated according to a frequency, to obtain a second sorting result;

 a dividing module, configured to divide the frequency resource to be allocated into L sets according to the second sorting result, where the center frequency points of the L sets are respectively P1...PL;

 For related content, please refer to the foregoing description herein, and no further details are provided herein.

 In this embodiment, optionally, the first analog module 1403 may be specifically configured to: according to the measured frequency bands, in the interference signal formed by the different frequency bands of the first signal after the air interface is formed. The distortion variable simulates an interference signal formed by different frequency bands of the first signal after passing through the air interface.

 Optionally, in the apparatus of FIG. 14 or 15, the first receiving module 1503 is further configured to receive a second signal, where the second signal includes a useful signal, and after the first signal passes through the air interface, The formed interference signal has different values of transmission parameters used in different frequency bands of the useful signal.

 Optionally, in the apparatus of FIG. 14 or 15, the method further includes:

a third sending module, configured to send the first to the user equipment before receiving the second signal The first configuration information is used to indicate a first transmission parameter value used on the first frequency band allocated to the user equipment, where the first frequency band is composed of frequency points having a first feature, the first The feature includes: a difference between a center frequency point of the frequency resource occupied by the useful signal is less than or equal to a preset value; and,

 a fourth sending module, configured to send second configuration information to the user equipment, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated by the user equipment, where the second The frequency band is composed of frequency points having a second characteristic, and the second characteristic comprises: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value. Optionally, in the device of FIG. 14 or 15, the first sending module is further configured to: send a first signal, where the first signal is according to a predetermined precoding matrix indication and a channel reported by the user equipment. The quality indicator determines that the channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal.

 In this case, optionally, the device may include:

 a fifth sending module, configured to send, to the user equipment, channel state information, a reference signal, and a predetermined channel quality indicator, before the sending the first signal;

 And a fifth receiving module, configured to receive a channel quality indicator that is fed back by the user equipment, where the channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal.

 Optionally, the device may further include: a first measurement module, configured to sequentially measure interference caused by the received signal when transmitting the signal by using each preset precoding matrix; and a first determining module, configured to: The precoding matrix used by the transmission signal with the smallest received signal interference is determined as the optimal precoding matrix used for transmitting the first signal; and the second determining module is configured to determine the indication indicating that the optimal precoding matrix is used as a predetermined Precoding matrix indication. Another full-duplex communication device disclosed in the embodiment of the present invention can be applied to a network device. As shown in FIG. 16, the method includes:

 a sixth sending module 1601, configured to send the first signal;

The second receiving module 1602 is configured to receive a second signal, where the second signal includes a useful message And an interference signal formed by the first signal passing through the air interface, where values of transmission parameters used in different frequency bands of the useful signal are different;

 The second analog module 1603 is configured to simulate an interference signal formed by the first signal after passing through the air interface to obtain an analog interference signal.

 More specifically, the interference mode can be simulated by using the analog mode in the prior art, and the analog mode provided by any of the foregoing embodiments of the present invention can be used to obtain the corresponding analog interference signal of each frequency band. Do not repeat them.

 The second restoration module 1604 is configured to delete the analog interference signal from the second signal to restore the useful signal.

 Optionally, the embodiment may further include:

 The seventh sending module 1605 is configured to send first configuration information to the user equipment, where the first configuration information is used to indicate the first used on the first frequency band allocated by the user equipment, before receiving the second signal Transmitting a parameter value, the first frequency band is composed of frequency points having a first feature, and the first feature includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is less than or equal to a preset value;

 The eighth sending module 1606 is configured to send, to the user equipment, second configuration information, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated by the user equipment, where The second frequency band is composed of frequency points having a second characteristic, and the second characteristic comprises: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value.

 The device in this embodiment, when sending configuration information to the user, instructs the user to use different transmission parameter values in different frequency bands of the uplink data transmission resource, thereby facilitating reducing interference of the transmitted signal on the useful signal.

 Optionally, the foregoing transmission parameter may include: a modulation and coding scheme, or a power control parameter, or a reference signal pattern.

Optionally, in the device of this embodiment, the sixth sending module is further configured to: send a first signal, where the first signal is determined according to a predetermined precoding matrix indication and a channel quality indicator reported by the user equipment. The channel quality indicator is determined by the user equipment according to the received precoding matrix indication and channel state information-reference signal. In this case, the apparatus in this embodiment may further include: a ninth sending module, configured to send channel state information to the user equipment - a fifth receiving module, configured to receive a channel quality indicator that is fed back by the user equipment, where the channel quality indicator is instructed by the user equipment according to the precoding matrix and the channel state Information - reference signal is determined.

 Optionally, the apparatus in this embodiment may further include: a second measurement module, configured to sequentially measure interference caused by the received signal when using each preset matrix coded transmission signal; and a fourth determining module, configured to: The precoding matrix used for transmitting the signal with the least interference to the received signal is determined as the optimal precoding matrix used for transmitting the first signal; and the fifth determining module is configured to indicate the precoding matrix that uses the optimal precoding matrix The indication is indicated as a predetermined precoding matrix.

 Another full-duplex communication device disclosed in the embodiment of the present invention can be applied to a network device. As shown in FIG. 17, the method includes:

 The tenth sending module 1701 is configured to send a first signal, where the first signal is determined according to a predetermined precoding matrix indication and a channel quality indicator reported by the user equipment, where the channel quality indicator is received by the user equipment. The precoding matrix indication and channel state information-reference signal determination;

 The third receiving module 1702 is configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 The third analog module 1703 is configured to simulate an interference signal formed by the first signal after passing through the air interface to obtain an analog interference signal.

 The second restoration module 1704 is configured to delete the analog interference signal from the second signal to restore the useful signal.

 Optionally, the device in this embodiment may further include:

 The third measurement module 1705 is configured to sequentially measure interference caused by the received signal when the signal is sent by using each preset precoding matrix;

 a sixth determining module 1706, configured to determine, by using a precoding matrix that is used for transmitting the signal with the least interference to the received signal, an optimal precoding matrix used for transmitting the first signal;

 a seventh determining module 1707, configured to indicate, as a predetermined precoding matrix indication, a precoding matrix indication indicating that the optimal precoding matrix is used;

An eleventh sending module 1708, configured to send channel state information to the user equipment - reference signal And a predetermined precoding matrix indication.

 The fifth receiving module 1709 is configured to receive a channel quality indicator that is fed back by the user equipment, where the channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal.

 The apparatus according to the embodiment, according to the principle that the interference caused by the transmission signals of different precoding matrices is different to the received signal, the precoding matrix with the smallest interference to the received signal is used as the precoding matrix of the transmitted signal, thereby reducing the transmitted signal. Interference with useful signals improves the accuracy of the demodulated useful information. Another full-duplex communication device disclosed in the embodiment of the present invention may be applied to a UE, including: a fourth receiving module, configured to receive a precoding matrix indication and a channel state information-reference signal sent by the network device;

 And an eighth determining module, configured to determine, according to the precoding matrix indication and the channel state information-reference signal, a channel quality indicator, where the channel quality indicator is used by the network device to determine a sending signal.

 When the device is applied to the UE, the PMI is not determined, but the PMI sent by the network device is directly received, and the CQI is determined by using the PMI. Therefore, the CQI determination process can be simplified. A full duplex communication device disclosed in the embodiment of the present invention includes:

 a first transmitter, configured to send the first signal;

 a first receiver, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 a first processor, configured to simulate an interference signal formed by the different frequency bands of the first signal after the air interface, to obtain an analog interference signal corresponding to each frequency band, and delete the corresponding frequency band from the second signal The analog interference signal is used to restore the useful signal.

 Optionally, in this embodiment, the first processor is configured to separately simulate interference signals formed by different frequency bands of the first signal after the air interface, including:

Deleting the analog interference signal corresponding to each frequency band from the second signal to restore the Useful signal.

 Optionally, the first processor is further configured to divide, by the N resource block clusters occupied by the useful signal into M sets, and the difference between the center frequency points of adjacent resource block clusters in each set The value is in a preset range, each resource block cluster includes at least two resource blocks that are consecutive in frequency, the M is a positive integer, and M is less than or equal to N, and the M sets correspond to M different frequency bands;

 Distorting variables at a center frequency point of each set before and after the first signal passing through the air interface are respectively measured, and the distortion variable at a center frequency point of each set is an abnormal variable corresponding to each measured frequency band. .

 For details, please refer to the foregoing descriptions herein, and no further details are provided herein.

 Optionally, the first processor is further configured to: send frequency resource configuration information to the user equipment, where the frequency resource configuration information includes frequency resource information and the L, where the L is used by the user equipment to determine The frequency resource information is used to indicate a resource block cluster that is a transmission resource of uplink data allocated to the user equipment, and the L is a positive integer.

 Optionally, the first processor is further configured to: sort the frequency resources to be allocated according to the frequency to obtain a second sorting result; and divide the frequency resources to be allocated into L according to the second sorting result. The central frequency points of the L sets are respectively P1...PL.

Optionally, the first transmitter is further configured to: send the first configuration information to the user equipment, where the first configuration information is used to indicate that the user equipment is allocated before receiving the second signal. a first transmission parameter value used on the first frequency band, the first frequency band being composed of frequency points having a first characteristic, the first characteristic comprising: a difference from a center frequency point of a frequency resource occupied by the useful signal The value is less than or equal to the preset value; and, sending, to the user equipment, second configuration information, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated by the user equipment, The second frequency band is composed of frequency points having a second characteristic, and the second characteristic includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value. Optionally, the first transmitter is further configured to: before the sending the first signal, send a channel state information-reference signal and a predetermined precoding matrix indication to the user equipment, and And receiving, by the user equipment, a channel quality indicator, where the channel quality indication is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal. In this case, the first processor may be further configured to: sequentially measure interference caused by the received signal when transmitting the signal by using each preset precoding matrix; and adopt a transmission signal that minimizes interference to the received signal. The precoding matrix is determined to be an optimal precoding matrix employed for transmitting the first signal; a precoding matrix indication indicating the use of the optimal precoding matrix is indicated as a predetermined precoding matrix indication. Another full-duplex communication device disclosed in the embodiment of the present invention includes:

 a second transmitter, configured to send the first signal;

 a second receiver, configured to receive a second signal, where the second signal includes an interference signal and a useful signal formed by the first signal passing through the air interface, and values of transmission parameters used on different frequency bands of the useful signal Different

 a second processor, configured to simulate an interference signal formed by the first signal after the air interface, to obtain an analog interference signal, and deleting the analog interference signal from the second signal to restore the useful signal .

 Optionally, the second processor is further configured to: send the first configuration information to the user equipment, where the first configuration information is used to indicate that the user equipment is allocated, before the receiving the second signal a first transmission parameter value used on the first frequency band, the first frequency band being composed of frequency points having a first characteristic, the first characteristic comprising: a difference from a center frequency point of a frequency resource occupied by the useful signal The value is less than or equal to the preset value; and, sending, to the user equipment, second configuration information, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated by the user equipment, The second frequency band is composed of frequency points having a second characteristic, and the second characteristic includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value.

The second transmitter may be further configured to: before the sending the first signal, send a channel state information-reference signal and a predetermined precoding matrix indication to the user equipment, and receive the channel quality that is fed back by the user equipment. The channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal; And determining the channel quality indicator according to the predetermined precoding matrix indication.

 Optionally, the first processor is further configured to: sequentially measure interference caused by the received signal when each of the preset precoding matrices is used, and perform precoding of the transmit signal that minimizes interference to the received signal. The matrix is determined to be an optimal precoding matrix employed for transmitting the first signal; a precoding matrix indication indicating the use of the optimal precoding matrix is indicated as a predetermined precoding matrix indication. Another full-duplex communication device disclosed in the embodiment of the present invention includes:

 a second transmitter, configured to send the first signal;

 a second receiver, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface, and the value of the transmission parameter used on different frequency bands of the useful signal Different

 a second processor, configured to simulate an interference signal formed by the first signal after the air interface, to obtain an analog interference signal, and deleting the analog interference signal from the second signal to restore the useful signal .

 Optionally, the second processor is further configured to: send the first configuration information to the user equipment, where the first configuration information is used to indicate that the user equipment is allocated, before the receiving the second signal a first transmission parameter value used on the first frequency band, the first frequency band being composed of frequency points having a first characteristic, the first characteristic comprising: a difference from a center frequency point of a frequency resource occupied by the useful signal The value is less than or equal to the preset value; and, sending, to the user equipment, second configuration information, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated by the user equipment, The second frequency band is composed of frequency points having a second characteristic, and the second characteristic includes: a difference between a center frequency point of a frequency resource occupied by the useful signal is greater than the preset value.

Optionally, the second transmitter is further configured to: before the sending the first signal, send a channel state information-reference signal and a predetermined precoding matrix indication to the user equipment, and receive the user equipment feedback The channel quality indicator is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal. In this case, the first processor may be further configured to: sequentially measure and use each preset precoding matrix to send The interference caused by the received signal when the signal is sent; the precoding matrix used for the transmitted signal with the least interference to the received signal is determined as the optimal precoding matrix used for transmitting the first signal; The precoding matrix of the matrix is indicated as a predetermined precoding matrix indication. Another full-duplex communication device disclosed in the embodiment of the present invention includes:

 a third transmitter, configured to send a first signal, where the first signal is determined according to a predetermined precoding matrix indication and a channel quality indicator reported by the user equipment, where the channel quality indicator is determined by the user equipment according to the received Precoding matrix indication and channel state information - reference signal determination;

 a third receiver, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal passing through the air interface;

 a third processor, configured to simulate an interference signal formed by the first signal after the air interface, to obtain an analog interference signal, and deleting the analog interference signal from the second signal to restore the useful signal .

 Optionally, the third transmitter is further configured to: send channel state information-reference signal and a predetermined precoding matrix indication to the user equipment, and receive a channel quality indicator that is fed back by the user equipment, where the channel The quality indication is determined by the user equipment according to the precoding matrix indication and the channel state information-reference signal.

 Optionally, the third transmitter is further configured to: before the sending the first signal, send a channel state information-reference signal and a predetermined precoding matrix indication to the user equipment. In this case, the third processor may be further configured to: sequentially measure interference caused by the received signal when transmitting the signal by using each preset precoding matrix; and adopt a transmission signal that minimizes interference to the received signal. The precoding matrix is determined to be an optimal precoding matrix employed for transmitting the first signal; a precoding matrix indication indicating the use of the optimal precoding matrix is indicated as a predetermined precoding matrix indication.

 The embodiment of the invention further discloses a communication terminal, comprising:

a fourth receiver, configured to receive a precoding matrix indication and a channel state information-reference signal sent by the network device; And a fourth processor, configured to determine a channel quality indicator according to the precoding matrix indication and the channel state information-reference signal, where the channel quality indicator is used by the network device to determine a sending signal.

 Fig. 18 shows a general computer system configuration of the above apparatus.

 The computer system may in particular be a processor based computer such as a general purpose personal computer (PC), a portable device such as a tablet computer, or a smart phone.

 More specifically, the above computer system can include a bus, a processor 181, a memory 182, a communication interface 183, an input device 184, and an output device 185. The processor 181, the memory 182, the communication interface 183, the input device 184, and the output device 185 are connected to each other through a bus. Wherein: The bus can include a path for communicating information between various components of the computer system.

 The processor 181 may be a general-purpose processor, such as a general-purpose central processing unit (CPU), a network processor (NP), a microprocessor, etc., or may be an application-specific integrated circuit (ASIC). , or one or more integrated circuits for controlling the execution of the program of the present invention. It can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

 A program for executing the technical solution of the present invention is stored in the memory 182, and an operating system and other applications can also be stored. Specifically, the program may include program code, and the program code includes computer operation instructions. More specifically, the memory 182 may be a read-only memory (ROM), other types of static storage devices that can store static information and instructions, a random access memory (RAM), and can store information and Other types of dynamic storage devices, disk storage, and so on.

 Input device 184 can include means for receiving data and information input by a user, such as a keyboard, mouse, camera, scanner, light pen, voice input device, touch screen, and the like.

 Output device 185 may include devices that allow output of information to the user, such as a display screen, a printer, a speaker, and the like.

Communication interface 183 may include devices that use any type of transceiver to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Network (WLAN), and the like. The processor 181 executes the program stored in the memory 182 for implementing the full duplex communication method provided by any of the embodiments of the present invention.

 The functions described in the method of the present embodiment can be stored in a readable storage medium of a computing device if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, a portion of the embodiments of the present invention that contributes to the prior art or a portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a The computing device (which may be a personal computer, server, mobile computing device, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

 The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the various embodiments may be referred to each other.

 The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the broadest scopes

Claims

Rights request 1. A full-duplex communication method, characterized by including: Send the first signal; Receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface; Respectively simulate the interference signals formed after different frequency bands of the first signal pass through the air interface, and obtain simulated interference signals corresponding to each frequency band; The analog interference signals corresponding to each frequency band are deleted from the second signal to restore the useful signal. 2. The method according to claim 1, wherein the interference signals formed after the different frequency bands of the first signal are simulated respectively and pass through the air interface include: According to the measured distortion amounts corresponding to each frequency band, interference signals formed after different frequency bands of the first signal pass through the air interface are simulated. 3. The method according to claim 2, further comprising: The N resource block clusters occupied by the useful signals are divided into M sets. The difference between the center frequencies of adjacent resource block clusters in each set is within a preset range. Each resource block cluster includes continuous frequencies. At least two resource blocks of , the M is a positive integer, and M is less than or equal to N, and the M sets correspond to M different frequency bands; The distortion amount at the center frequency point of each set is measured before and after the first signal passes through the air interface. The distortion amount at the center frequency point of each set is the distortion amount corresponding to each frequency band obtained by the measurement. 4. The method according to claim 3, wherein the dividing the N resource block clusters into M sets includes: Sort the N resource block clusters according to frequency to obtain a first sorting result; divide the N resource block clusters into M sets according to the first sorting result. 5. The method according to claim 1, characterized in that, before receiving the second signal, further comprising: Send frequency resource configuration information to the user equipment. The frequency resource configuration information includes frequency resource information and L. The L represents the number of frequency resources to be allocated into sets, and the L An interpretation method for the user equipment to determine the frequency resource information. The frequency resource information is used to indicate the resource block cluster allocated to the user equipment as the transmission resource for uplink data. The L is a positive integer. 6. The method according to any one of claims 1 to 5, characterized in that the transmission parameter values used in different frequency bands of the useful signal are different. 7. The method according to claim 6, characterized in that, before receiving the second signal, further comprising: Send first configuration information to the user equipment, where the first configuration information is used to indicate the first transmission parameter value used on the first frequency band allocated to the user equipment; Send second configuration information to the user equipment, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated to the user equipment. 8. The method according to claim 6 or 7, characterized in that, the first frequency band is composed of frequency points with first characteristics, and the first characteristics include: the center of the frequency resource occupied by the useful signal The difference in frequency points is less than or equal to the preset value; The second frequency band is composed of frequency points with second characteristics, and the second characteristics include: a difference with a center frequency point of the frequency resource occupied by the useful signal is greater than the preset value. 9. The method according to any one of claims 1 to 8, characterized in that, the first signal is determined based on a predetermined precoding matrix indication and a channel quality indication reported by the user equipment, and the channel quality indication is determined by the The user equipment determines based on the received precoding matrix indication and channel state information-reference signal. 10. The method according to claim 9, characterized in that, before sending the first signal, it further includes: Send channel state information-reference signal and predetermined precoding matrix indication to user equipment; Receive the channel quality indication fed back by the user equipment. 11. The method according to claim 9 or 10, characterized in that the process of predetermining the precoding matrix indication includes: Measure the interference caused to the received signal when sending signals using each preset precoding matrix in sequence; Determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; The precoding matrix indication indicating that the optimal precoding matrix is used is used as a predetermined precoding matrix indication. 12. A full-duplex communication method, characterized by including: Send the first signal; Receive a second signal, the second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface, and the values of the transmission parameters used in different frequency bands of the useful signal are different; Simulate the interference signal formed after the first signal passes through the air interface to obtain a simulated interference signal; The simulated interference signal is deleted from the second signal to restore the useful signal. 13. The method according to claim 12, characterized in that, before receiving the second signal, further comprising: Send first configuration information to the user equipment, where the first configuration information is used to indicate the first transmission parameter value used on the first frequency band allocated to the user equipment; Send second configuration information to the user equipment, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated to the user equipment. 14. The method according to claim 13, characterized in that, the first frequency band is composed of frequency points with first characteristics, and the first characteristics include: a center frequency point corresponding to the frequency resource occupied by the useful signal. The difference is less than or equal to the preset value; The second frequency band is composed of frequency points with second characteristics, and the second characteristics include: a difference with a center frequency point of the frequency resource occupied by the useful signal is greater than the preset value. 15. The method according to claims 11 to 14, characterized in that the transmission parameters include: Modulation coding scheme; or, Power control parameters; or, Reference signal pattern. 16. The method according to any one of claims 12 to 14, characterized in that the first signal is determined based on a predetermined precoding matrix indication and a channel quality indication reported by the user equipment, and the channel quality indication is determined by the The user equipment determines based on the received precoding matrix indication and channel state information-reference signal. 17. The method according to claim 16, characterized in that, before sending the first signal, further comprising: Send channel state information-reference signal and predetermined precoding matrix indication to user equipment; Receive the channel quality indication fed back by the user equipment. 18. The method according to claim 16 or 17, characterized in that the process of predetermining the precoding matrix indication includes: Measure the interference caused to the received signal when using each preset precoding matrix to send signals in turn; Determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; The precoding matrix indication indicating that the optimal precoding matrix is used is used as a predetermined precoding matrix indication. 19. A full-duplex communication method, characterized by including: Send a first signal, the first signal is determined based on a predetermined precoding matrix indication and a channel quality indication reported by the user equipment, and the channel quality indication is determined by the user equipment based on the received precoding matrix indication and channel Status information - reference signal determination; Receive a second signal, the second signal including a useful signal and an interference signal formed by the first signal after passing through the air interface; Simulate the interference signal formed after the first signal passes through the air interface to obtain a simulated interference signal; The simulated interference signal is deleted from the second signal to restore the useful signal. 20. The method according to claim 19, characterized in that, before sending the first signal, further comprising: Send channel state information-reference signal and predetermined precoding matrix indication to user equipment; Receive the channel quality indication fed back by the user equipment. 21. The method according to claim 19 or 20, characterized in that the process of predetermining the precoding matrix indication includes: Measure the interference caused to the received signal when using each preset precoding matrix to send signals in turn; Determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; The precoding matrix indication indicating that the optimal precoding matrix is used is used as a predetermined precoding matrix indication. 22. A full-duplex communication method, characterized by including: Receive the precoding matrix indication and the channel state information-reference signal sent by the network device; determine the channel quality indication based on the precoding matrix indication and the channel state information-reference signal, and the channel quality indication is used by the network device to determine the transmission signal . 23. A full-duplex communication device, characterized by including: The first sending module is used to send the first signal; A first receiving module, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface; The first simulation module is used to simulate interference signals formed by different frequency bands of the first signal after passing through the air interface, and obtain simulated interference signals corresponding to each frequency band; A first restoration module, configured to delete the analog interference signals corresponding to each frequency band from the second signal to restore the useful signal. 24. The device according to claim 23, characterized in that the first simulation module includes: The first simulation unit is configured to simulate interference signals formed after different frequency bands of the first signal pass through the air interface based on the measured distortion amounts corresponding to each frequency band. 25. The device according to claim 24, further comprising: A dividing module, used to divide the N resource block clusters occupied by the useful signal into M sets Combined, the difference between the center frequencies of adjacent resource block clusters in each set is within a preset range, each resource block cluster includes at least two resource blocks with continuous frequencies, the M is a positive integer, and M Less than or equal to N, the M sets correspond to M different frequency bands; The first measurement module is used to measure the distortion amount of the first signal at the center frequency point of each set before and after passing through the air interface. The distortion amount at the center frequency point of each set is the measured value. The amount of distortion corresponding to the frequency band. 26. The device according to claim 25, characterized in that the dividing module includes: a sorting subunit, used to sort N resource block clusters according to frequency size to obtain the first sorting result; Divide subunits, used to divide the N resource block clusters into M sets. 27. The device according to claim 23, further comprising: The second sending module is configured to send frequency resource configuration information to the user equipment. The frequency resource configuration information includes frequency resource information and L. The L represents the number of frequency resources to be allocated into sets, and the L is used for the The user equipment determines an interpretation method of the frequency resource information, where the frequency resource information is used to indicate a resource block cluster allocated to the user equipment as a transmission resource for uplink data, and the L is a positive integer. 28. The device according to any one of claims 23 to 27, characterized in that the transmission parameter values used in different frequency bands of the useful signal are different. 29. The device according to claim 28, further comprising: A third sending module, configured to send first configuration information to the user equipment before receiving the second signal, where the first configuration information is used to indicate the first transmission used on the first frequency band allocated to the user equipment. Parameter value, the first frequency band is composed of frequency points with first characteristics, and the first characteristics include: the difference from the center frequency point of the frequency resource occupied by the useful signal is less than or equal to a preset value; A fourth sending module, configured to send second configuration information to the user equipment, where the second configuration information is used to indicate a second transmission parameter value used on the second frequency band allocated to the user equipment, the second The frequency band is composed of frequency points with second characteristics, and the second characteristics include: a difference from a center frequency point of the frequency resource occupied by the useful signal is greater than the preset value. 30. The apparatus according to any one of claims 23 to 29, further comprising: a fifth sending module, configured to send channel state information-reference signal to the user equipment before sending the first signal. Predetermined precoding matrix indication; The fifth receiving module is configured to receive a channel quality indication fed back by the user equipment, where the channel quality indication is determined by the user equipment based on the precoding matrix indication and the channel state information-reference signal. 31. The device according to claim 30, further comprising: The first measurement module is used to measure the interference caused to the received signal when sending signals using each preset precoding matrix in sequence; A first determination module, configured to determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; The second determination module is configured to use the precoding matrix indication indicating the use of the optimal precoding matrix as a predetermined precoding matrix indication. 32. A full-duplex communication device, characterized by including: The sixth sending module is used to send the first signal; The second receiving module is used to receive a second signal. The second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface. The values of transmission parameters used in different frequency bands of the useful signal different; The second simulation module is used to simulate the interference signal formed after the first signal passes through the air interface, and obtain a simulated interference signal; A second restoration module, configured to delete the analog interference signal from the second signal to restore the useful signal. 33. The device according to claim 32, further comprising: A seventh sending module, configured to send first configuration information to the user equipment before receiving the second signal, where the first configuration information is used to indicate the first transmission used on the first frequency band allocated to the user equipment. Parameter value, the first frequency band is composed of frequency points with first characteristics, and the first characteristics include: the difference from the center frequency point of the frequency resource occupied by the useful signal is less than or equal to a preset value; An eighth sending module, configured to send second configuration information to the user equipment, where the second configuration information The setting information is used to indicate the second transmission parameter value used on the second frequency band allocated to the user equipment. The second frequency band is composed of frequency points with second characteristics. The second characteristics include: and the useful The difference between the center frequency points of the frequency resources occupied by the signals is greater than the preset value. 34. The device according to claim 32, further comprising: The ninth sending module is used to send channel state information-reference signal and predetermined precoding matrix indication to the user equipment; The fifth receiving module is configured to receive a channel quality indication fed back by the user equipment, where the channel quality indication is determined by the user equipment based on the precoding matrix indication and the channel state information-reference signal; The first signal is determined based on the predetermined precoding matrix indication and the channel quality indication. 35. The device according to claim 34, further comprising: The second measurement module is used to measure the interference caused to the received signal when sending signals using each preset precoding matrix in sequence; A fourth determination module, configured to determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; The fifth determination module is configured to use the precoding matrix indication indicating the use of the optimal precoding matrix as a predetermined precoding matrix indication. 36. A full-duplex communication device, characterized by including: The tenth sending module is configured to send a first signal. The first signal is determined based on a predetermined precoding matrix indication and a channel quality indication reported by the user equipment. The channel quality indication is determined by the user equipment based on the received The precoding matrix indication and channel state information-reference signal determination; A third receiving module, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface; The third simulation module is used to simulate the interference signal formed after the first signal passes through the air interface, and obtain a simulated interference signal; A restoration module, configured to delete the analog interference signal from the second signal to restore the useful signal. 37. The apparatus according to claim 36, further comprising: an eleventh sending module, configured to send channel state information-reference signal and predetermined precoding matrix indication to the user equipment; The fifth receiving module is configured to receive a channel quality indication fed back by the user equipment, where the channel quality indication is determined by the user equipment based on the precoding matrix indication and the channel state information-reference signal. 38. The device according to claim 36 or 37, further comprising: a third measurement module, configured to measure the interference caused to the received signal when each preset precoding matrix is used to transmit signals; A sixth determination module, configured to determine the precoding matrix used to transmit the signal with minimal interference to the received signal as the optimal precoding matrix used to transmit the first signal; A seventh determination module, configured to use a precoding matrix indication indicating the use of the optimal precoding matrix as a predetermined precoding matrix indication. 39. A full-duplex communication device, characterized by including: The fourth receiving module is used to receive the precoding matrix indication and channel status information-reference signal sent by the network device; The eighth determination module is configured to determine a channel quality indication based on the precoding matrix indication and the channel state information-reference signal. The channel quality indication is used by the network device to determine a signal to send. 40. A full-duplex communication device, characterized by: including: The first transmitter is used to send the first signal; A first receiver, configured to receive a second signal, where the second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface; The first processor is used to simulate the interference signals formed by different frequency bands of the first signal after passing through the air interface, and obtain the simulated interference signals corresponding to each frequency band, and delete the corresponding frequency bands from the second signal. The simulated interference signal is used to restore the useful signal. 41. The full-duplex communication device according to claim 40, wherein the first processor is further configured to: send frequency resource configuration information to the user equipment, the frequency resource configuration information including frequency resource information and L , the L represents the number of sets into which the frequency resources to be allocated are divided. purpose, the L is used by the user equipment to determine the interpretation method of the frequency resource information, the frequency resource information is used to indicate the resource block cluster allocated to the user equipment as a transmission resource for uplink data, the L is a positive integer. 42. The full-duplex communication device according to claim 40 or 41, characterized in that the first transmitter is further configured to: before receiving the second signal, send first configuration information to the user equipment , the first configuration information is used to indicate the first transmission parameter value used on the first frequency band allocated to the user equipment, the first frequency band consists of frequency points with first characteristics, and the first characteristics include : The difference with the center frequency point of the frequency resource occupied by the useful signal is less than or equal to a preset value; and, sending second configuration information to the user equipment, the second configuration information is used to indicate that the user equipment The second transmission parameter value used in the second frequency band allocated by the device. The second frequency band is composed of frequency points with second characteristics. The second characteristics include: the center frequency point of the frequency resource occupied by the useful signal. The difference is greater than the preset value. 43. The full-duplex communication device according to any one of claims 40 to 42, wherein the first transmitter is further configured to: before sending the first signal, send channel status information to the user equipment. -Reference signal and predetermined precoding matrix indication, and, receiving channel quality indication fed back by the user equipment, the channel quality indication is generated by the user equipment based on the precoding matrix indication and the channel state information -Reference Signal OK. 44. The full-duplex communication device according to claim 43, wherein the first processor is further configured to: sequentially measure the interference caused to the received signal when using each preset precoding matrix to transmit signals; Determine the precoding matrix used to transmit the signal with the least interference to the received signal as the optimal precoding matrix used to transmit the first signal; use the precoding matrix indication indicating that the optimal precoding matrix is used as the predetermined precoding matrix. Encoding matrix indication. 45. A full-duplex communication device, characterized by: including: a second transmitter, used to transmit the first signal; The second receiver is used to receive a second signal. The second signal includes a useful signal and an interference signal formed by the first signal after passing through the air interface. The values of the transmission parameters used in different frequency bands of the useful signal different; The second processor is configured to simulate the interference signal formed after the first signal passes through the air interface to obtain a simulated interference signal, and delete the simulated interference signal from the second signal, to Restore the useful signal. 46. The full-duplex communication device according to claim 45, wherein the second processor is further configured to: before receiving the second signal, send the first configuration information to the user equipment, so The first configuration information is used to indicate the first transmission parameter value used on the first frequency band allocated to the user equipment. The first frequency band is composed of frequency points with first characteristics, and the first characteristics include: and The difference between the center frequency points of the frequency resources occupied by the useful signal is less than or equal to a preset value; and, sending second configuration information to the user equipment, where the second configuration information is used to indicate allocation for the user equipment. The second transmission parameter value used in the second frequency band, the second frequency band is composed of frequency points with second characteristics, the second characteristics include: the difference from the center frequency point of the frequency resource occupied by the useful signal The value is greater than the preset value. 47. The full-duplex communication device according to claim 45 or 46, characterized in that the second transmitter is further configured to: before sending the first signal, send channel state information-reference signal to the user equipment and a predetermined precoding matrix indication, and receiving a channel quality indication fed back by the user equipment; The channel quality indication is determined by the user equipment based on the precoding matrix indication and the channel state information-reference signal; The first signal is determined based on the predetermined precoding matrix indication and the channel quality indication. 48. The full-duplex communication device according to claim 47, wherein the first processor is further configured to: sequentially measure the interference caused to the received signal when using each preset precoding matrix to transmit signals; Determine the precoding matrix used to transmit the signal with the least interference to the received signal as the optimal precoding matrix used to transmit the first signal; use the precoding matrix indication indicating that the optimal precoding matrix is used as the predetermined precoding matrix. Encoding matrix indication. 49. A full-duplex communication device, characterized by: including: The third transmitter is configured to send a first signal. The first signal is determined based on a predetermined precoding matrix indication and a channel quality indication reported by the user equipment. The channel quality indication is determined by the user equipment based on the received The precoding matrix indication and channel state information-reference signal determination; The third receiver is used to receive the second signal, the second signal includes the useful signal and the The interference signal formed after the first signal passes through the air interface; A third processor configured to simulate the interference signal formed after the first signal passes through the air interface to obtain a simulated interference signal, and delete the simulated interference signal from the second signal to restore the useful signal. . 50. The full-duplex communication device according to claim 49, characterized in that the third transmitter is further configured to, before sending the first signal, send channel state information-reference signal and preset signal to the user equipment. the determined precoding matrix indication, and receiving a channel quality indication fed back by the user equipment, where the channel quality indication is determined by the user equipment based on the precoding matrix indication and the channel state information-reference signal. 51. The full-duplex communication device according to claim 49 or 50, characterized in that the third processor is further configured to: sequentially measure the effects on the received signal when using each preset precoding matrix to send signals. Interference; Determine the precoding matrix used for the transmit signal with the least interference to the received signal as the optimal precoding matrix used to transmit the first signal; Use the precoding matrix indication indicating that the optimal precoding matrix is used as a predetermined precoding matrix indication. 52. A communication terminal, characterized by: including: The fourth receiver is used to receive the precoding matrix indication and channel status information-reference signal sent by the network device; A fourth processor, configured to determine a channel quality indication based on the precoding matrix indication and the channel state information-reference signal, where the channel quality indication is used by the network device to determine a transmission signal.