CN108075815B - Method and communication device for sending and receiving data - Google Patents

Abstract

Embodiments of the present disclosure relate to methods and communication devices for transmitting and receiving data. A method for transmitting data, comprising: performing long-term precoding on data to be transmitted and a demodulation reference signal (DMRS) in a Resource Element (RE) of a Physical Resource Block (PRB) based on information related to the long-term precoding acquired from one device; performing short-time precoding on the data and the DMRS based on a predetermined at least one short-time precoding scheme, such that the device can determine the at least one short-time precoding scheme via the short-time precoding performed on the DMRS; and transmitting the data precoded with long time precoding and short time precoding and the DMRS to the device. According to the scheme of the embodiment of the disclosure, a DMRS-based semi-open loop MIMO transmission scheme can be provided, optimized beamforming gain and diversity gain are realized, and meanwhile, system overhead is reduced.

Description

Method and communication device for sending and receiving data

technical field

Embodiments of the present disclosure relate to the field of wireless communications, and more particularly, to methods and communication devices for transmitting and receiving data.

Background technique

With the advent of the fifth generation of mobile communication technology (5G), multiple-input multiple-output (MIMO) antenna arrays or "massive MIMO" have received much attention. Two-dimensional (2D) active antenna array (AAA) systems are currently employed to form three-dimensional (3D) beams in both vertical and horizontal domains, and can support more antenna ports in closed-loop MIMO transmission modes. However, in high mobility scenarios, the open loop (OL) MIMO transmission mode is more suitable.

In the current LTE system, the OL transmission mechanism is defined as Transmission Mode 2 (TM2) and Transmission Mode 3 (TM3). TM2 is Spatial Frequency Block Coding (SFBC) for 1 stream (rank 1) transmission. TM3 is Large Delay Cyclic Diversity Transmission (LD-CDD) for 1-4 data stream (rank1-4) transmission. To better utilize the 2D AAA antenna configuration to support better beamforming gain and diversity gain, the concept of half-open loop MIMO transmission is proposed.

SUMMARY OF THE INVENTION

In general, embodiments of the present disclosure provide methods and apparatus for transmitting and receiving data.

In one aspect of the present disclosure, a method for transmitting data is provided. The method includes performing long-term precoding on to-be-transmitted data and demodulation reference signals (DMRS) in resource elements (REs) of physical resource blocks (PRBs) based on long-term precoding-related information acquired from a device; encoding; performing short-term precoding on the data and the DMRS based on a predetermined at least one short-term precoding scheme, enabling the device to determine the at least one short-term precoding via the short-term precoding performed on the DMRS and sending the long-term precoded and short-term precoded the data and the DMRS to the apparatus.

In another aspect of the present disclosure, a method for receiving data is provided. The method includes: pre-decoding data in a resource element (RE) of a received physical resource block (PRB) and a demodulation reference signal (DMRS) to obtain the data, the pre-decoding comprising: obtaining and the data information about short-term precoding of DMRS; based on the acquired information, determine a DMRS required to demodulate the data; and demodulate the data based on the determined DMRS.

In another aspect of the present disclosure, a communication device is provided. The communication device includes a controller configured to reference data to be transmitted in resource elements (REs) of physical resource blocks (PRBs) and demodulation references based on long-term precoding-related information obtained from a device signal (DMRS) performs long-term precoding, and performs short-term precoding on the data and the DMRS based on a predetermined at least one short-term precoding scheme, so that the device can perform short-term precoding on the DMRS via precoding to determine the at least one short-term precoding scheme; and a transceiver configured to transmit the long-term and short-term precoded data and the DMRS to the apparatus.

In another aspect of the present disclosure, a communication device is also provided. The communication device includes: a transceiver configured to receive data and a demodulation reference signal (DMRS) in resource elements (REs) of physical resource blocks (PRBs); and a controller configured to receive data and a demodulation reference signal (DMRS) for the data and The DMRS is pre-decoded to obtain the data, wherein the controller is further configured to: obtain information related to short-term precoding of the DMRS; and based on the obtained information, determine to demodulate the data the required DMRS; and demodulating the data based on the determined DMRS.

According to the solutions of the embodiments of the present disclosure, a DMRS-based half-open-loop MIMO transmission solution can be provided, so as to achieve optimized beamforming gain and diversity gain, and at the same time reduce system overhead.

It should be understood that the matters described in this Summary are not intended to limit key or critical features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become apparent from the following description.

Description of drawings

The above and other features, advantages and aspects of various embodiments of the present disclosure will become more apparent when taken in conjunction with the accompanying drawings and with reference to the following detailed description. In the drawings, the same or similar reference numbers refer to the same or similar elements, wherein:

FIG. 1 shows a schematic diagram of a communication scenario in which embodiments of the present disclosure may be implemented;

2 shows a flowchart of a method for sending data according to an embodiment of the present disclosure;

3 shows a schematic diagram of conventional DMRS mapping in a cyclic prefix frame;

4 to 9 each show schematic diagrams of division of RE groups according to various embodiments of the present disclosure;

10 shows a flowchart of a method for receiving data according to an embodiment of the present disclosure;

11 shows a structural block diagram of an apparatus for sending data according to an embodiment of the present disclosure;

FIG. 12 shows a structural block diagram of an apparatus for receiving data according to an embodiment of the present disclosure; and

FIG. 13 shows a structural block diagram of a device according to an embodiment of the present disclosure.

Detailed ways

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for the purpose of A more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes, and are not intended to limit the protection scope of the present disclosure.

The term "base station" as used herein may refer to Node B (NodeB or NB), Evolved Node B (eNodeB or eNB), Remote Radio Unit (RRU), Radio Head (RH), Remote Radio Head (RRH), Relay or low power nodes such as pico base stations, femto base stations, etc. In the context of the present disclosure, for convenience of discussion, an eNB is mainly used as an example of a base station.

The term "terminal device" as used herein refers to any terminal device or user equipment (UE) capable of wireless communication with a base station or with each other. By way of example, the terminal device may include a communication capable sensor, detector, mobile terminal (MT), subscriber station (SS), portable subscriber station (PSS), mobile station (MS) or access terminal (AT), and an in-vehicle of the above-mentioned equipment, etc. In the context of the present disclosure, the terms "terminal device" and "user equipment" are used interchangeably for convenience of discussion, and a UE is mainly used as an example of a terminal device.

The term "communication device" used herein refers to a device that transmits or receives data in a wireless communication system, which may be a base station or a terminal device. In the context of the present disclosure, for the purpose of discussion convenience, the eNB is mainly used as the transmitter and the UE is used as the receiver as an example.

As used herein, the term "including" and variations thereof are open inclusive, ie "including but not limited to". The term "based on" is "based at least in part on." The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment". Relevant definitions of other terms will be given in the description below.

As known, in closed-loop MIMO transmission mode, the UE feeds back information about long-term precoding and short-term precoding (W1 feedback and W2 feedback) to the eNB, and the eNB then precodes the data to be sent to the UE based on this information And the precoded data is sent out through the antenna array. Accordingly, the UE demodulates the received data based on known information about long-term precoding and short-term precoding. In the high mobility scenario of the UE, the channel changes rapidly, and the feedback information becomes inapplicable. In order to support better beamforming gain and diversity gain, a half-open-loop MIMO transmission mode is proposed, in which the UE only feeds back information about long-term precoding (W1 feedback) to the eNB, and the eNB uses the information about long-term precoding to pair The data to be transmitted is long-term precoded and the data to be transmitted is short-term precoded using a predetermined short-term precoding scheme. The half-open-loop MIMO transmission mode will be described in more detail below with reference to FIG. 1 .

FIG. 1 shows a schematic diagram of a communication scenario 100 in which embodiments of the present disclosure may be implemented. As shown in FIG. 1 , eNB 110 may communicate with UE 120 . In the embodiments of the present disclosure, the eNB 110 acts as a transmitter and the UE 120 acts as a receiver (ie, downlink transmission). It should be understood that the process shown in FIG. 1 is also applicable to uplink transmission (where the UE is used as the transmitter and the eNB is used as the receiver) and transmission between UEs (where one UE is used as the transmitter and the other UE is used as the receiver) Happening).

At 101, UE 120 feeds back information on long-term precoding to eNB 110 (W1 feedback). For example, in a frequency division multiplexing (FDD) system, the eNB 110 may send a channel state information reference signal (CSI-RS) to the UE 120, and the UE 120 may measure the channel based on this signal and feed back the most suitable long-term precoding information to the UE 120. eNB 110. For example, in a time division multiplexing (TDD) system, the UE 120 may send a sounding reference signal (SRS) to the eNB 110, and the eNB 110 may measure the uplink SRS to obtain channel information and calculate the most suitable long-term precoding information. Then, the eNB 110 may perform long-term precoding on the data to be transmitted based on the long-term precoding information. Also, regarding short-term precoding, the eNB 110 short-term precodes data to be transmitted using a predetermined short-term precoding scheme. For example, for the transmission of 1 data stream, short-term precoding is usually performed based on the SFBC scheme. For example, for transmission of 2 or more data streams, short-term precoding is typically performed based on beam selection and a co-phase cycling scheme. At 102, the eNB 110 sends the precoded data to the UE 120, and the eNB 110 sends at least information about the short-term precoding to the UE 120 for demodulation of the data.

The embodiments of the present disclosure mainly consider how to transmit the information about short-term precoding, especially in the cyclic scheme of short-term precoding for a half-open-loop MIMO system. The basic idea of the embodiments of the present disclosure is that the short-term precoding-related information is transmitted based on the variable-granularity short-term precoding of the DMRS. In one precoding cycle, different short-term precoding schemes are performed on RE groups of DMRS. More specific description will be given below with reference to FIG. 2 .

FIG. 2 shows a flowchart of a method 200 for transmitting data according to an embodiment of the present disclosure. The method may be implemented at a transmitting end (eg, eNB 110 of FIG. 1 ) in wireless communication.

As shown in FIG. 2, at 210, based on long-term precoding-related information obtained from a device, long-term precoding is performed on the data to be transmitted and the DMRS in the REs of the PRB. First, the eNB 110 may map the data to be transmitted and the DMRS into REs of the corresponding PRBs. For example, Figure 3 shows a schematic diagram of a conventional DMRS mapping 300 in a cyclic prefix frame, where only one PRB is shown. As shown in FIG. 3 , 310 indicates REs for Physical Dedicated Control Channel (PDCCH), 320 indicates REs for ports 1-4 of cell-specific reference signals (CRS), and 330 indicates REs for UE-specific reference signals REs for port 5, 340 indicates REs for ports 7-10 for DMRS, and 350 indicates REs for data. In one PRB, DMRS sequences of different DMRS ports are mapped to 6 RE pairs. Then, based on the long-term precoding-related information acquired from, for example, the UE 120 via 101, a long-term precoding process is performed on the data to be transmitted and the DMRS in the REs mapped to the PRBs. The acquisition of information related to long-term precoding is similar to the process described above in connection with 101 of FIG. 1 . The specific processing of long-term precoding can be implemented in any suitable manner known in the art or developed in the future. In order to avoid obscuring the present disclosure, the detailed description of the long-term precoding process is omitted here.

At 220, short-term precoding is performed on the data and the DMRS based on the predetermined at least one short-term precoding scheme, enabling a device (eg, UE 120) to determine the at least one short-term precoding via the short-term precoding performed on the DMRS Program. According to an embodiment of the present disclosure, the predetermined at least one short-term precoding scheme may correspond to at least one codeword in the codebook. In one embodiment, short-term precoding may be performed based on SFBC, based on LD-CDD, or based on random precoding matrix indication (PMI), depending on the number of data streams required. For example, different short-term precoding is performed separately by cyclic application among several codewords.

According to an embodiment of the present disclosure, short-term precoding information is transmitted to a receiving device, eg, UE 120, via short-term precoding performed on the DMRS for demodulation of data. In the case where there are multiple different short-term precoding schemes, according to an embodiment of the present disclosure, at least one RE group including DMRS may be determined for each PRB, and for each RE group, cyclically performed in a predetermined order Multiple different short-term precoding schemes. Different short-term precoding schemes are performed for corresponding RE groups in a predetermined order in one cycle. In this way, the short-term precoding information can be efficiently transmitted by using the existing DMRS, and the DMRS overhead can be saved, thereby reducing the system overhead.

According to an embodiment of the present disclosure, the division of RE groups may be determined based on the predetermined number of short-term precoding schemes and the allowed DMRS overhead. In one embodiment, as few RE groups can be divided as DMRS overhead allows. For example, RE groups may be divided at PRB level, RE set level or RE level, and accordingly, multiple short-term precoding schemes may be cyclically performed for RE groups at PRB level, RE set level or RE level. In one embodiment, the plurality of short-term precoding schemes may be cyclically performed in the frequency domain or the time domain in an FDD manner or a TDD manner. Of course, any other suitable looping manner known in the art or developed in the future may also be employed. For ease of understanding, the division of RE groups and the cyclic execution of precoding are illustrated below with reference to FIG. 4 to FIG. 6 .

In one embodiment, adjacent DMRS REs may be grouped into groups as RE groups, thereby determining at least one RE group including DMRS. FIG. 4 shows a schematic diagram 400 of division of RE groups according to the present embodiment, in which one PRB is taken as an example, and in which 6 predetermined short-term precoding schemes W(1)-W(6) are used. As shown in FIG. 4, RE groups 410, 420, 430, 440, 450 and 460 are formed by REs of adjacent DMRSs in the PRB, respectively. Then, for each RE group in the RE groups 410-460, the short-term precoding schemes W(1)-W(6) are sequentially performed according to the combination of the FDD method and the TDD method.

In one embodiment, adjacent DMRS REs and surrounding data REs may be divided into groups as RE groups, so as to determine at least one RE group including DMRS. The division may be performed for one PRB, or may be divided across multiple PRBs. FIG. 5 shows a schematic diagram 500 of division of RE groups according to the present embodiment, where one PRB is taken as an example, and 6 predetermined short-term precoding schemes W(1)-W(6) are used. As shown in FIG. 5 , RE groups 510 , 520 , 530 , 540 , 550 and 560 are respectively formed by REs of adjacent DMRSs in the PRB and surrounding data REs. Then, for each RE group in the RE groups 510-560, the short-term precoding schemes W(1)-W(6) are sequentially performed according to the combination of the FDD method and the TDD method. In this embodiment, data REs and DMRS REs in the same RE group can be co-located, wherein the data REs and DMRS REs are subjected to the same short-term precoding, thereby improving the accuracy of channel estimation on the receiving side. Of course, data REs and DMRS REs in the same RE group may not be co-located, where the data REs and DMRS REs are subjected to different short-term precoding. FIG. 6 shows a schematic diagram 600 of division of RE groups according to the present embodiment, where two PRBs are taken as an example, and where 10 predetermined short-term precoding schemes W(1)-W(10) are used. As shown in FIG. 6, REs of adjacent DMRSs in a PRB may form RE groups 601-610 with data REs in the surrounding PRB and data REs in adjacent PRBs, respectively. Then, for the RE groups 601-610, the short-term precoding schemes W(1)-W(10) are sequentially performed according to the combination of the FDD method and the TDD method.

According to an embodiment of the present disclosure, the above-described divided groups may be combined in a time domain or a frequency domain as an RE group. For example, the same precoded RE groups (ie, DMRS RE groups under the same DMRS granularity) can be combined in the time domain or frequency domain, thereby making the channel estimation on the receiving side in a half-open-loop MIMO system more reliable, reducing Received data error. FIG. 7 shows a schematic diagram 700 of division of RE groups according to an embodiment of the present disclosure, where one PRB is taken as an example. As shown in FIG. 7, identically precoded, eg, two DMRS ports are combined in the time domain to form RE groups 710-730. Thereby, on the receiving side, channel estimation interpolation/average can be applied between different Orthogonal Frequency Division Multiplexing (OFDM) symbols to improve the accuracy of the channel estimation. FIG. 8 shows a schematic diagram 800 of division of RE groups according to an embodiment of the present disclosure, where one PRB is taken as an example. As shown in FIG. 8, identically precoded, eg, two DMRS ports are combined in the frequency domain to form RE groups 810-820. Thereby, on the receiving side, channel estimation interpolation/average can be applied between different subcarriers to improve the accuracy of the channel estimation. FIG. 9 shows a schematic diagram 900 of division of RE groups according to an embodiment of the present disclosure, where two PRBs are taken as an example. As shown in FIG. 9, identically precoded, eg, two DMRS ports are combined in the frequency domain across PRBs to form RE groups 910-960. As a result, more cyclic precoding granularities can exist across several PRBs, so that while the channel estimation accuracy can be improved at the receiving side, DMRS overhead can be further saved. It should be understood that the above-mentioned combination can also be performed in any other suitable manner, and is not limited to the above-listed embodiments.

Returning to FIG. 2, at 230, the long-term precoded and short-term precoded data and DMRS are sent to a device (eg, UE 120 of FIG. 1). According to an embodiment of the present disclosure, the method 200 may further include sending information related to the short-term precoding of the DMRS to the receiving side (eg, UE 120 ) for the receiving side to use for data demodulation. In one embodiment, the information related to short-term precoding of DMRS may include at least DMRS configuration granularity and DMRS precoding cycle mode. The DMRS configuration granularity refers to how many DMRS RE groups will be used in each precoding cycle. The DMRS precoding cycle mode refers to the order in which the DMRS precoding cycle is implemented, such as FDM, TDM and so on. In one embodiment, the eNB 110 may utilize higher layer signaling, such as RRC signaling, SIB, MIB, DCI format, etc., to transmit to the UE 120 at least DMRS configuration granularity (Config_granularity) and DMRS precoding cycling mode (Config_dmrs_cycling).

The method for transmitting data implemented on the transmitting side according to the embodiment of the present disclosure has been described above. Correspondingly, the embodiments of the present disclosure may also provide a method for receiving data implemented at the receiving side. A detailed description will be given below with reference to FIG. 10 .

10 shows a flowchart of a method 1000 for receiving data according to an embodiment of the present disclosure. The method may be implemented at a receiving end (eg, UE 120 of FIG. 1 ) in wireless communication. The method may include pre-decoding the data in the REs of the received PRB and the DMRS to obtain the data. According to an embodiment of the present disclosure, pre-decoding may be implemented including 1010-1030 shown in FIG. 10 .

At 1010, information related to short-term precoding of DMRS is obtained. For example, UE 120 may obtain this information from higher layer signaling such as RRC signaling, SIB, MIB, DCI format, and the like. As described above, the information may include at least DMRS configuration granularity (Config_granularity) and DMRS precoding cycling mode (Config_dmrs_cycling). For the specific description, please refer to the above-mentioned related content.

At 1020, based on the obtained information, a DMRS required to demodulate the data is determined. As is known, specific data is associated with a specific DMRS. After obtaining the DMRS configuration granularity and the DMRS precoding cycle mode, the short-term precoding scheme of the DMRS corresponding to the corresponding data and the precoded DMRS can be determined, and then the DMRS can be pre-decoded accordingly to obtain demodulation DMRS required for the data. In one embodiment, where there are two or more DMRSs at the same DMRS granularity for demodulation of the data, channel estimation interpolation or smoothing may be performed based on the different DMRSs to determine the solution for the data Tune the desired DMRS. Therefore, the channel estimation on the receiving side can be made more reliable, thereby reducing the error of the received data. At 1030, the data is demodulated based on the determined DMRS.

The method for transmitting and receiving data according to an embodiment of the present disclosure has been described above. According to the method of the embodiments of the present disclosure, a semi-open-loop MIMO transmission scheme can be provided, in which short-term precoding information is transmitted based on DMRS RE groups with variable granularity, thereby supporting transparent application of UE, and obtaining precoding loop gain, while simultaneously Reduce system overhead. Correspondingly, the embodiments of the present disclosure also provide corresponding apparatuses for transmitting and receiving data. A detailed description will be given below in conjunction with FIG. 11 and FIG. 12 .

FIG. 11 shows a structural block diagram of an apparatus 1100 for sending data according to an embodiment of the present disclosure. It should be understood that the apparatus 1100 may be implemented at a transmitting end device in wireless communication, for example, the eNB 110 shown in FIG. 1 . Alternatively, the apparatus 1100 may be the eNB itself.

As shown in FIG. 11 , the apparatus 1100 may include a first precoding unit 1110 , a second precoding unit 1120 and a sending unit 1130 . The first precoding unit 1110 may be configured to perform long-term precoding on the data to be transmitted and the DMRS in the REs of the PRB based on information related to long-term precoding obtained from a device (eg, the UE 120 of FIG. 1 ). coding. The second precoding unit 1120 may perform short-term precoding on the data and the DMRS based on at least one predetermined short-term precoding scheme. The transmitting unit 1130 may be configured to transmit the long-term precoded and short-term precoded data and the DMRS to the device. It should be understood that the first precoding unit 1110 and the second precoding unit 1120 may be implemented by different precoders or controllers, or may be implemented by the same precoder or controller. In addition, the transmitting unit 1130 may be implemented by a transceiver.

In one embodiment, when the at least one short-term precoding scheme includes multiple different short-term precoding schemes, the second precoding unit 1120 may be further configured to: target one of the PRBs or multiple PRBs, determining at least one RE group including the DMRS; and cyclically executing different short-term precoding schemes in a predetermined order for each RE group.

In one embodiment, the second precoding unit 1120 may be further configured to: divide adjacent DMRS REs into groups as the RE groups. In one embodiment, the second precoding unit 1120 may be further configured to: divide adjacent DMRS REs and surrounding data REs into groups as the RE group. In one embodiment, the second precoding unit 1120 may be further configured to combine the divided groups in the time domain or the frequency domain as the RE group.

In one embodiment, the second precoding unit 1120 may be further configured to perform the short-term precoding scheme cyclically in at least one of frequency division multiplexing and time division multiplexing.

In one embodiment, the sending unit 1130 may be further configured to send the information related to the short-term precoding of the DMRS to the device. In one embodiment, the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cyclic mode.

FIG. 12 shows a structural block diagram of an apparatus 1200 for receiving data according to an embodiment of the present disclosure. It should be understood that the apparatus 1200 may be implemented at a receiving end device in wireless communication, for example, the UE 120 shown in FIG. 1 . Alternatively, the apparatus 1200 may be the UE itself. Apparatus 1200 may be configured to receive data and DMRS in REs of a PRB and pre-decode the data and the DMRS to obtain the data.

As shown in FIG. 12 , according to an embodiment of the present disclosure, the apparatus 1200 may include an acquisition unit 1210 , a determination unit 1220 and a demodulation unit 1230 . The obtaining unit 1210 may be configured to obtain information related to the short-term precoding of the DMRS. In one embodiment, the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cyclic mode. The determining unit 1220 may be configured to determine, based on the acquired information, a DMRS required to demodulate the data. In one embodiment, the determining unit 1220 may be further configured to: determine different DMRSs under the same DMRS granularity available for demodulation of the data; and perform channel estimation interpolation or smoothing based on the different DMRSs, to Determine the DMRS required for demodulation of the data. The demodulation unit 1230 may be configured to demodulate the data based on the determined DMRS. It should be understood that the obtaining unit 1210, the determining unit 1220 and the demodulating unit 1230 may be implemented by different controllers, or may be implemented by the same controller.

It should be understood that each unit recited in the apparatuses 1100 and 1200 corresponds to each action in the methods 200 and 1000 described with reference to FIGS. 2 and 10, respectively. In addition, the operations and features of the devices 1100, 1200 and the units included therein all correspond to the operations and features described above in conjunction with FIG. 2 and FIG. 10, and have the same effect, and the specific details will not be repeated.

13 shows a block diagram of a device 1300 suitable for implementing embodiments of the present disclosure. The apparatus 1300 may be used to implement a base station, such as the eNB 110 shown in FIG. 1 ; and/or to implement a terminal device, such as the UE 120 shown in FIG. 1 .

As shown, device 1300 includes controller 1310 . The controller 1310 controls the operation and function of the device 1300. For example, in some embodiments, controller 1310 may perform various operations by virtue of instructions 1330 stored in memory 1320 coupled thereto. Memory 1320 may be of any suitable type suitable for use in the local technical environment, and may be implemented using any suitable data storage technology, including but not limited to semiconductor-based storage devices, magnetic storage devices and systems, optical storage devices and systems. Although only one memory unit is shown in FIG. 13 , there may be multiple physically distinct memory units in device 1300 .

Controller 1310 may be of any suitable type suitable for the local technical environment, and may include, but is not limited to, general purpose computers, special purpose computers, microcontrollers, digital signal controllers (DSPs), and controllers in multicore controller-based architectures. one or more. Device 1300 may also include multiple controllers 1310 . The controller 1310 is coupled to a transceiver 1340, which may enable reception and transmission of information by means of one or more antennas 1350 and/or other components. Note that transceiver 1340 may be a separate device, or may include separate devices for transmission and reception, respectively.

When the device 1300 acts as the eNB 110, the controller 1310 and the transceiver 940 may cooperate to implement the method 200 described above with reference to FIG. 2 . When the device 1300 acts as the UE 120, the controller 1310 and the transceiver 1340, for example, may cooperate to operate under the control of the instructions 1330 in the memory 1320 to implement the method 1000 described above with reference to FIG. 10 . For example, the transceiver 1340 may implement operations related to the reception and/or transmission of data/information, while the controller 1310 performs or triggers processing, arithmetic, and/or other operations on the data. All the features described above with reference to FIGS. 2 and 10 are applicable to the device 1300 and will not be repeated here.

In general, the various example embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. Certain aspects may be implemented in hardware, while other aspects may be implemented in firmware or software that may be executed by a controller, microprocessor or other computing device. While aspects of the embodiments of the present disclosure are illustrated or described as block diagrams, flowcharts, or using some other graphical representation, it is to be understood that the blocks, apparatus, systems, techniques, or methods described herein may be taken as non-limiting Examples are implemented in hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controllers or other computing devices, or some combination thereof. Examples of hardware devices that may be used to implement embodiments of the present disclosure include, but are not limited to, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standards (ASSPs), Systems on Chips (SOCs), Complex Programmable Logic device (CPLD), etc.

By way of example, embodiments of the present disclosure may be described in the context of machine-executable instructions, such as included in program modules executed in a device on a target's real or virtual processor. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data structures. In various embodiments, the functionality of the program modules may be combined or divided among the described program modules. Machine-executable instructions for program modules may be executed within local or distributed devices. In a distributed facility, program modules may be located in both local and remote storage media.

Computer program code for implementing the methods of the present disclosure may be written in one or more programming languages. Such computer program code may be provided to a processor of a general purpose computer, special purpose computer or other programmable data processing apparatus such that the program code, when executed by the computer or other programmable data processing apparatus, causes the flowchart and/or block diagrams The functions/operations specified in are implemented. The program code may execute entirely on the computer, partly on the computer, as a stand-alone software package, partly on the computer and partly on a remote computer or entirely on the remote computer or server.

In the context of this disclosure, a machine-readable medium may be any tangible medium that contains or stores a program for or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or devices, or any suitable combination thereof. More detailed examples of machine-readable storage media include electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read only memory (ROM), erasable programmable read only Memory (EPROM or flash memory), optical storage devices, magnetic storage devices, or any suitable combination thereof.

Additionally, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in a sequential order, or that all illustrated operations be performed to obtain desired results. In some cases, multitasking or parallel processing can be beneficial. Likewise, although the above discussion contains some specific implementation details, these should not be construed as limiting the scope of any invention or claims, but rather as descriptions of specific embodiments that may be directed to specific inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims (22)

1. A method for sending data, comprising: performing long-term precoding on to-be-transmitted data and demodulation reference signals (DMRS) in resource elements (REs) of physical resource blocks (PRBs) based on long-term precoding-related information acquired from a device; short-term precoding is performed on the data and the DMRS based on a predetermined at least one short-term precoding scheme, enabling the apparatus to determine the at least one short-term precoding via the short-term precoding performed on the DMRS coding scheme; and The long-term and short-term precoded data and the DMRS are sent to the apparatus. 2. The method of claim 1, wherein the at least one short-term precoding scheme comprises a plurality of different short-term precoding schemes, and performing short-term precoding on the DMRS comprises: For one or more of the PRBs, determining at least one RE group including the DMRS; and For each of the RE groups, the plurality of different short-term precoding schemes are cyclically executed in a predetermined order. 3. The method of claim 2, wherein determining at least one of the RE groups comprises: The adjacent DMRS REs are divided into groups as the RE group. 4. The method of claim 2, wherein determining at least one of the RE groups comprises: The adjacent DMRS REs and surrounding data REs are divided into groups as the RE group. 5. The method of claim 4, wherein determining at least one of the RE groups comprises: The divided groups are combined in the time domain or frequency domain as the RE group. 6. The method of claim 2, wherein performing different short-term precoding schemes in a predetermined order comprises: The short-term precoding scheme is cyclically performed in at least one of frequency division multiplexing and time division multiplexing. 7. The method of claim 1, further comprising: Information related to short-term precoding of the DMRS is sent to the device. 8. The method of claim 7, wherein the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cycle mode. 9. A method for receiving data, comprising: Pre-decoding data in resource elements (REs) of received physical resource blocks (PRBs) and demodulation reference signals (DMRS) to obtain the data, the pre-decoding comprising: obtaining information related to the short-term precoding of the DMRS; determining the DMRS required to demodulate the data based on the acquired information; and The data is demodulated based on the determined DMRS. 10. The method of claim 9, wherein the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cycle mode. 11. The method of claim 10, wherein determining the DMRS required to demodulate the data comprises: determining different DMRSs under the same DMRS granularity that can be used for demodulation of the data; and Channel estimation interpolation or smoothing is performed based on the different DMRSs to determine the DMRS required for demodulation of the data. 12. A communication device comprising: a controller configured to perform on data to be transmitted and a demodulation reference signal (DMRS) in resource elements (REs) of physical resource blocks (PRBs) based on long-term precoding-related information obtained from a device long-term precoding, and short-term precoding is performed on the data and the DMRS based on a predetermined at least one short-term precoding scheme, such that the apparatus can determine the data via the short-term precoding performed on the DMRS the at least one short-term precoding scheme; and a transceiver configured to transmit the long-term precoded and short-term precoded said data and the DMRS to the device. 13. The communication device of claim 12, wherein the at least one short-term precoding scheme comprises a plurality of different short-term precoding schemes, and the controller is further configured to: For one or more of the PRBs, determining at least one RE group including the DMRS; and For each of the RE groups, different short-term precoding schemes are cyclically executed in a predetermined order. 14. The communication device of claim 13, wherein the controller is further configured to: The adjacent DMRS REs are divided into groups as the RE group. 15. The communication device of claim 13, wherein the controller is further configured to: The adjacent DMRS REs and surrounding data REs are divided into groups as the RE group. 16. The communication device of claim 15, wherein the controller is further configured to: The divided groups are combined in the time domain or frequency domain as the RE group. 17. The communication device of claim 13, wherein the controller is further configured to: The short-term precoding scheme is cyclically performed in at least one of frequency division multiplexing and time division multiplexing. 18. The communication device of claim 12, wherein the transceiver is further configured to: Information related to short-term precoding of the DMRS is sent to the device. 19. The communication device of claim 18, wherein the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cycle mode. 20. A communication device comprising: a transceiver configured to receive data and demodulation reference signals (DMRS) in resource elements (REs) of physical resource blocks (PRBs); and a controller configured to pre-decode the data and the DMRS to obtain the data, wherein the controller is also configured to: obtaining information related to the short-term precoding of the DMRS; determining the DMRS required to demodulate the data based on the acquired information; and The data is demodulated based on the determined DMRS. 21. The communication device of claim 20, wherein the information related to short-term precoding of DMRS includes at least DMRS configuration granularity and DMRS precoding cycle mode. 22. The communication device of claim 20, wherein the controller is further configured to: determining different DMRSs under the same DMRS granularity that can be used for demodulation of the data; and Channel estimation interpolation or smoothing is performed based on the different DMRSs to determine the DMRS required for demodulation of the data.

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