CN106034006A - Processing method and processing device for channel state measurement pilot frequency - Google Patents

Abstract

The invention provides a processing method and processing device for channel state measurement pilot frequency. The processing method comprises steps of dividing channel state measurement pilot frequency into assigned quantity sets; the channel state measurement pilot frequency is a preset quantity dimension and the preset quantity is quantity of antennas of a base station; the base station transmits the channel state measurement pilot frequency to a terminal according to the assigned quantity sets, wherein the channel state measurement pilot frequency is used for indicating the terminal to perform channel measurement; the base station receives channel state information fed back by the terminal; and the channel state information is used for indicating the base station to execute pre-coding processing on the terminal. The processing method and processing device solve the problem that the measurement performance is limited because of dimension division measurement and feedback and achieve an effect that resources obtained by competition can be better utilized.

Description

Channel state measurement pilot processing method and device

technical field

The present invention relates to the field of communications, in particular to a method and device for processing channel state measurement pilots.

Background technique

In a wireless communication system, the sending end and the receiving end use multiple antennas to obtain a higher rate by means of spatial multiplexing. Compared with the general spatial multiplexing method, an enhanced technology is that the receiving end feeds back channel information to the sending end, and the sending end uses some transmit precoding techniques according to the obtained channel information, which can greatly improve the transmission performance. For single-user MIMO, channel feature vector information is directly used for precoding; for multi-user MIMO, more accurate channel information is required.

In the Long Term Evolution (LTE for short) plan, downlink reference signals are divided into: cell-specific reference signal (Cell-specific Reference Signal, CRS for short), mobile station specific reference signal (UE-specific Reference Signal) Signal, DMRS for short), channel state information reference signal (CSI Reference Signal, CSI-RS for short), positioning reference signal (Positioning Reference Signal, PRS for short), MBSFN-RS, etc.

Among them, CRS is a public pilot, which is sent in the full bandwidth and used for channel measurement and demodulation. The CRS pilot dimension corresponds to the number of antenna ports; DMRS is used for a dedicated pilot, which is unique to each user, and is sent in a part of the bandwidth. , used for user data demodulation, DMRS pilot dimension corresponds to the number of layers of transmitted data; CSI-RS is channel state information pilot, which is public, sent in full bandwidth, used to measure channel state, CSI-RS pilot The frequency dimension corresponds to the number of antenna ports, and if the number of transmitting antennas is Nt, the base station transmits CSI-RS of Nt dimensions.

CRS is the measurement and demodulation pilot, it is Cell Special, and it is sent in the full bandwidth. The UE uses the received CRS to perform channel measurement and measure the channel quality indication (CQI for short) information, PMI and rank indication of the current channel. Rank Indicator (RI for short), and feedback; the UE can also use the received CRS to demodulate data to obtain the data information required by the UE. CSI-RS is used to measure channel state information, which is Cell Special and sent in full bandwidth. The CSI-RS is used to measure CQI information, PMI information and RI information. Compared with CRS, the pilot frequency density of CSI-RS is much lower, and an RB has only one RE overhead on average. DMRS is a demodulation pilot sent on PDSCH, which is UE Special. The DMRS signal and the user's data are precoded together. When the user receives the DMRS signal, the channel information and precoding information can be obtained to demodulate the data.

In the Long Term Evolution (LTE for short) plan, the feedback of channel information mainly uses a relatively simple single codebook feedback method, and the performance of the MIMO transmit precoding technology mainly depends on the accuracy of the codebook feedback.

The basic principle of channel information quantization feedback based on codebook is briefly described as follows:

Assuming that the limited feedback channel capacity is B bps/Hz, then the number of available codewords is N= ^2B . The eigenvector space of the channel matrix is quantized to form a codebook space The transmitting end and the receiving end jointly store or generate this codebook in real time (the receiving end and the receiving end are the same). According to the obtained channel matrix H, the receiving end adopts certain criteria from Choose a code word that best matches the channel Represents the eigenvector information of the channel, and feeds back the codeword sequence number i to the transmitter. Here, the codeword sequence number is called a precoding matrix indicator (Precoding Matrix Indicator, PMI for short). The transmitter finds the corresponding precoding code word according to the sequence number i To obtain channel information.

What has been introduced above is the principle of the codebook feedback technology in LTE. When it is applied, some more specific feedback methods are also involved. In the LTE standard, the minimum feedback unit of channel information is subband (Subband) channel information. A subband is composed of several resource blocks (Resource Block, RB for short), and each RB is composed of multiple resource elements (Resource Elements). , referred to as RE), the RE is the smallest unit of time-frequency resources in LTE, and the resource representation method of LTE is used in LTE-A. Several Subbands can be called Multi-Subband, and many Subbands can be called Broadband Wideband.

The feedback content related to channel information in LTE is introduced below. Channel state information (Channel state information, referred to as CSI) feedback includes: channel quality indication (Channel quality indication, referred to as CQI) information, PMI and rank indicator (Rank Indicator, referred to as for RI). Here we are most concerned about the PMI information, but RI and CQI also belong to the channel state information feedback content.

CQI is an index to measure the quality of downlink channel. In the 36-213 protocol, the CQI is represented by an integer value from 0 to 15, which respectively represent different CQI levels, and different CQIs correspond to respective modulation modes and coding rates (Modulation and Coding Scheme, MCS for short).

RI is used to describe the number of spatially independent channels, corresponding to the rank (Rank) of the channel response matrix. In the open-loop spatial multiplexing and closed-loop spatial multiplexing modes, the UE needs to feed back RI information, and in other modes, it does not need to feed back RI information. The rank of the channel matrix corresponds to the number of layers.

With the rapid development of wireless communication technology, users' wireless applications are becoming more and more abundant, which drives the rapid growth of wireless data services. It is predicted that in the next 10 years, data services will increase at a rate of 1.6-2 times per year. This brings great challenges to the wireless access network. Multi-antenna technology is the key technology to meet the challenge of explosive growth of wireless data services. Currently, the multi-antenna technology supported in 4G only supports the horizontal dimension beamforming technology with a maximum of 8 ports, and there is still great potential to further greatly increase the system capacity.

Massive MIMO (Massive MIMO) technology is a key enhancement technology in the next-generation communication technology. The main features of the Massive MIMO system are: the base station side is equipped with a large-scale antenna array, such as 64 or 128 antennas, or even more. When transmitting, use MU-MIMO technology to multiplex multiple users at the same frequency at the same time. Generally speaking, the ratio of the number of antennas to the number of multiplexing users is maintained at about 5-10 times. It can be proved that whether it is a strongly correlated channel in a line-of-sight environment or an uncorrelated channel under rich scattering, the correlation coefficient between the channels of any two users decays exponentially with the increase in the number of antennas. For example, when the base station side configures When there are 128 antennas, the correlation coefficient between the channels of any two users is close to 0, that is to say, the channels corresponding to multiple users are close to orthogonality. On the other hand, a large array can bring very considerable array gain and diversity gain.

For Massive MIMO, due to the introduction of a large number of antennas, the traditional method: each antenna sends a channel measurement pilot CSI-RS, the terminal detects the CSI-RS and obtains the channel matrix corresponding to each transmission resource through channel estimation, according to the channel matrix Obtain the optimal baseband precoding vector for each frequency-domain subband and the optimal number of transmission layers in the wideband, and then perform feedback based on the pilot measurement technique and codebook feedback technique introduced earlier. This method is applied in massive MIMO There are bigger problems. It is mainly reflected in that, firstly, with the increase of the number of antennas, the pilot overhead becomes larger and larger, and too much pilot overhead will seriously affect the performance of the system and increase the complexity of the system. Secondly, due to the increase in the number of antennas on the base station side, the base station needs to generate Nt-dimensional pilots for channel measurement, and the terminal side also needs to feed back Nt-dimensional codebooks based on the measurement pilots, which is very complex in calculation and measurement; Figure 1 is related A schematic diagram of a 2D antenna array of a multi-antenna system in the technology, as shown in Figure 1,

Fractal dimension measurement and feedback is a technology applied to massive MIMO. This technology requires the base station side to send the measurement pilots of the horizontal antenna dimension Nt _H and the vertical antenna dimension Nt _v of the 2D antenna array respectively. As shown in FIG. 1 , the base station sends 8Tx measurement pilots in the horizontal dimension, and 8Tx measurement pilots in the vertical dimension. The terminal receives pilot CSI-RS-h and CSI-RS-v of two different dimensions respectively, measures the channel state information of each dimension and feeds back CSI _H and CSI _v . The base station side synthesizes CSI information of different dimensions into Nt-dimensional CSI information. For example, PMI synthesis can use the Kronecker product form in formula (1):

$C_{\mathrm{Nt}}=C_h\⊗C_v$ (1)

The base station uses the synthesized full-dimensional CSI information to precode the terminal.

Although the problems of large pilot overhead and complex measurement in massive MIMO are solved in related technologies, the performance is greatly limited, and this technology is only suitable for strongly correlated channels. However, in an actual channel, the multipath is complex and there are many influencing factors. Most of the time, the channel is not strongly correlated, so when applying fractal feedback, there will be a great performance loss.

For the problem in the related art that the performance of channel measurement is limited due to fractal measurement and feedback, no effective solution has been proposed yet.

Contents of the invention

The main purpose of the present invention is to provide a channel state measurement pilot processing method and device to at least solve the problem in the related art that the performance of channel measurement is limited due to fractal measurement and feedback.

According to one aspect of the present invention, a method for processing channel state measurement pilots is provided, further comprising: the base station divides the channel state measurement pilots into a specified number of groups, wherein the channel state measurement pilots are a predetermined number of dimensions, the The predetermined number is the number of antennas of the base station; the base station respectively sends the channel state measurement pilot to the terminal according to the specified number group, where the channel state measurement pilot is used to instruct the terminal to perform channel measurement; The base station receives channel state information fed back by the terminal, where the channel state information is used to instruct the base station to perform precoding processing on the terminal; where the specified number of channel state measurement pilots includes: the first A quantity group of channel state measurement pilots of the first type and a second quantity group of channel state measurement pilots of the second type; wherein, the channel state measurement pilots of the second quantity group are obtained from the Each group of channel state measurement pilots of the first type is composed of one or more elements selected respectively.

Further, the quantity of each group of channel measurement pilots in the specified number of groups of channel state measurement pilots is equal.

Further, the sum of dimensions of the specified number of channel state measurement pilots is greater than the predetermined number.

Further, the base station sending the channel state measurement pilots to the terminal respectively according to the specified number of groups includes: the base station respectively sending the channel state measurement pilots to the terminal according to the specified number of groups at a predetermined period on the third number of subframes sending the channel state measurement pilot.

Further, the base station respectively sending the channel state measurement pilots to the terminal according to the specified number of groups includes: the base station respectively sending the channel state measurement pilots to the terminal according to the specified number of groups on the fourth number of resource blocks RB. The above channel state measurement pilot.

Further, the base station respectively sending the channel state measurement pilots to the terminal according to the specified number of groups includes: the base station uses a fifth number of pilot positions to respectively send the channel state measurement pilots to the terminal according to the specified number of groups. Channel state measurement pilot.

Further, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

According to another aspect of the present invention, a method for processing channel state measurement pilots is provided, further comprising: the terminal receives a specified number of channel state measurement pilots sent by the base station, wherein the channel state measurement pilots are a predetermined number dimension, the predetermined number is the number of antennas of the base station; the terminal performs channel measurement according to the channel state measurement pilot, and feeds back channel state information to the base station.

Further, the manner in which the terminal receives the specified number of channel state measurement pilots sent by the base station includes one of the following: the terminal receives the specified number of channel state measurement pilots sent by the base station on the third number of subframes; The terminal receives the specified number of channel state measurement pilots sent by the base station on the fourth number of resource blocks RB; the terminal receives the specified number of channel state measurement pilots sent by the base station on the fifth number of pilot positions. A number of sets of channel state measurement pilots.

Further, the manner in which the terminal performs channel measurement according to the channel state measurement pilot includes one of the following: the terminal performs channel measurement on the subframe; the terminal performs channel measurement on the fourth number of resource blocks RB Perform channel measurement on designated RBs in ; the terminal performs channel measurement on designated pilot positions among the fifth number of pilot positions.

Further, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

According to still another aspect of the present invention, there is provided a channel state measurement pilot processing device, which is located at the base station side and further includes: a division module for dividing the channel state measurement pilot into a specified number of groups, wherein the channel state The measurement pilot is a predetermined number of dimensions, the predetermined number is the number of antennas of the base station; the sending module is configured to send the channel state measurement pilot to the terminal according to the specified number group, wherein the channel state measurement pilot The frequency is used to instruct the terminal to perform channel measurement; the first receiving module is configured to receive channel state information fed back by the terminal, where the channel state information is used to instruct the base station to perform precoding processing on the terminal; Wherein, the specified number of channel state measurement pilots includes: a first number of first-type channel state measurement pilots and a second number of second-type channel state measurement pilots; wherein the second number of The channel state measurement pilots of the second type are respectively composed of one or more elements selected from each group of the channel state measurement pilots of the first type.

Further, the quantity of each group of channel measurement pilots in the specified number of groups of channel state measurement pilots is equal.

Further, the sum of dimensions of the specified number of channel state measurement pilots is greater than the predetermined number.

Further, the sending module includes: a first sending unit, configured to respectively send the channel state measurement pilots to the terminal at a predetermined period on the third number of subframes and according to the specified number of groups.

Further, the sending module includes: a second sending unit, configured to respectively send the channel state measurement pilots to the terminal on the fourth number of resource blocks RB according to the specified number of groups.

Further, the sending module includes: a third sending unit, configured to use a fifth number of pilot positions to send the channel state measurement pilots to the terminal respectively according to the specified number of groups.

Further, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

According to still another aspect of the present invention, a processing device for channel state measurement pilots is provided, which is located at the terminal side and further includes: a second receiving module, configured to receive a specified number of groups of channel state measurement pilots sent by the base station, wherein the The channel state measurement pilot is a predetermined number, the predetermined number is the number of antennas of the base station; an execution module is used to perform channel measurement according to the channel state measurement pilot, and feed back channel state information to the base station.

Further, the second receiving module includes one of the following: a first receiving unit, configured to receive the specified number of channel state measurement pilots sent by the base station on a third number of subframes; a second receiving unit, used to receive the specified number of channel state measurement pilots sent by the base station on the fourth number of resource block RBs; the third receiving unit is used to receive the channel state measurement pilots sent by the base station on the fifth number of pilot positions The specified number of channel state measurement pilots.

Further, the execution module includes one of the following: a first execution unit, configured to perform channel measurement on the subframe; a second execution unit, configured to specify RBs in the fourth number of resource blocks RBs performing channel measurement on; a third executing unit, configured to perform channel measurement on a specified pilot position in the fifth number of pilot positions.

Further, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

Through the present invention, the base station divides the predetermined number of channel state measurement pilots into designated groups, and then sends the designated number of channel state measurement pilots to the terminal respectively, and the terminal performs channel measurement according to the received state measurement pilots , which ensures that the base station can obtain better precoding performance, solves the problem of channel measurement performance limitation caused by fractal measurement and feedback in related technologies, and then achieves the effect of better utilization of the resources obtained.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

FIG. 1 is a schematic diagram of a 2D antenna array of a multi-antenna system in the related art;

2 is a flowchart of a method for processing channel state measurement pilots according to an embodiment of the present invention;

3 is a flowchart of a method for processing channel state measurement pilots according to an embodiment of the present invention;

FIG. 4 is a first structural diagram of a processing device for channel state measurement pilots according to an embodiment of the present invention;

FIG. 5 is a second structural block diagram of a device for processing channel state measurement pilots according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of channel state measurement pilots sent by the base station to the terminal respectively on three TTIs according to an optional embodiment of the present invention;

Fig. 7a is a first schematic diagram of non-continuous TTI periodically sent according to an optional embodiment of the present invention;

FIG. 7b is a first schematic diagram of a non-periodically transmitted discontinuous TTI according to an optional embodiment of the present invention;

FIG. 8a is a second schematic diagram of non-continuous TTIs periodically sent according to an optional embodiment of the present invention;

FIG. 8b is a second schematic diagram of non-continuous TTIs transmitted aperiodically according to an optional embodiment of the present invention;

FIG. 9 is a schematic diagram of sending pilots on RBs according to an optional embodiment of the present invention;

FIG. 10 is a schematic diagram of CSI-RS RE locations according to an optional embodiment of the present invention;

FIG. 11 is a first schematic diagram of a base station sending a CSI-RS according to an optional embodiment of the present invention;

FIG. 12 is a second schematic diagram of a base station sending a CSI-RS according to an optional embodiment of the present invention;

FIG. 13 is a third schematic diagram of a base station sending a CSI-RS according to an optional embodiment of the present invention;

FIG. 14 is a fourth schematic diagram of a base station sending a CSI-RS according to an optional embodiment of the present invention;

FIG. 15 is a fifth schematic diagram of a base station sending a CSI-RS according to an optional embodiment of the present invention;

FIG. 16 is a schematic diagram of a base station sending measurement pilots according to an optional embodiment of the present invention;

FIG. 17 is a schematic diagram of CSI-RS RE locations according to an optional embodiment of the present invention;

Fig. 18a is a third schematic diagram of continuous TTIs sent periodically according to an optional embodiment of the present invention;

Fig. 18b is a third schematic diagram of continuous TTIs transmitted aperiodically according to an optional embodiment of the present invention;

FIG. 19 is a schematic diagram of sending pilots on RBs according to an optional embodiment of the present invention;

FIG. 20 is a schematic diagram of CSI-RS RE locations according to an optional embodiment of the present invention; and

Fig. 21 is a schematic diagram of different 64Tx codebooks and channel correlation coefficients according to an optional embodiment of the present invention.

detailed description

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

This embodiment provides a method for processing channel state measurement pilots. FIG. 2 is a flowchart of a method for processing channel state measurement pilots according to an embodiment of the present invention. As shown in FIG. 2 , the steps of the method include:

Step S202: the base station divides the channel state measurement pilot into a specified number of groups;

Wherein, the channel state measurement pilot frequency is a predetermined number dimension, and the predetermined number is the number of antennas of the base station;

Step S204: the base station sends channel state measurement pilots to the terminal respectively according to the specified number of groups;

Wherein, the channel state measurement pilot is used to instruct the terminal to perform channel measurement.

Step S206: the base station receives the channel state information fed back by the terminal;

Wherein, the channel state information is used to instruct the base station to perform precoding processing on the terminal, the first number group of the first type of channel state measurement pilots and the second number group of the second type of channel state measurement pilots; wherein, the second number group The channel state measurement pilots of the second type are respectively composed of one element selected from each group of the channel state measurement pilots of the first type.

Through this embodiment, the base station divides the predetermined number of channel state measurement pilots into specified number groups, and then sends the specified number of channel state measurement pilots to the terminal respectively, and the terminal performs channel measurement according to the received state measurement pilots The method ensures that the base station can obtain better precoding performance, solves the problem of channel measurement performance limitation caused by fractal measurement and feedback in related technologies, and then achieves the effect of better utilization of competitive resources.

In addition, the number of each group of channel state measurement pilots in the specified number of groups of channel state measurement pilots in this embodiment is equal, and the sum of the dimensions of the specified number of channel state measurement pilots is greater than the predetermined number.

In another optional implementation manner of this embodiment, the manner in which the base station sends channel state measurement pilots to the terminal respectively according to the specified number of groups may be implemented in the following manner:

Way 1: The base station sends channel state measurement pilots to the terminal respectively at a predetermined period and according to a specified number of groups on the third number of subframes.

Manner 2: The base station sends channel state measurement pilots to the terminal respectively on the fourth number of resource blocks RB according to the specified number of groups.

Manner 3: The base station uses the fifth number of pilot positions to respectively send channel state measurement pilots to the terminal according to the specified number of groups.

Optionally, the channel state measurement pilot involved in this embodiment includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

FIG. 3 is a flowchart of a method for processing channel state measurement pilots according to an embodiment of the present invention. As shown in FIG. 3 , the steps of the method include:

Step S302: The terminal receives a specified number of channel state measurement pilots sent by the base station;

Wherein, the channel state measurement pilot frequency is a predetermined number dimension, and the predetermined number is the number of antennas of the base station;

Step S304: the terminal performs channel measurement according to the channel state measurement pilot, and feeds back channel state information to the base station.

Through this embodiment, the terminal respectively receives a specified number of channel state measurement pilots, and feeds back channel state information to the base station according to the channel state measurement pilots, so that the terminal can feed back channel state information to the base station.

The manner in which the terminal involved in this embodiment receives the specified number of channel state measurement pilots sent by the base station may include one of the following:

Mode 1: The terminal receives a specified number of groups of channel state measurement pilots sent by the base station on the third number of subframes;

Mode 2: The terminal receives the specified number of groups of channel state measurement pilots sent by the base station on the fourth number of resource blocks RB;

Mode 3: The terminal receives a specified number of channel state measurement pilots sent by the base station at the fifth number of pilot positions.

Based on the manner in which the terminal receives the specified number of channel state measurement pilots sent by the base station, the manner in which the terminal performs channel measurement according to the channel state measurement pilots may also include one of the following:

Mode 1: the terminal performs channel measurement on the subframe;

Mode 2: the terminal performs channel measurement on a designated RB in the fourth number of resource blocks RB;

Manner 3: The terminal performs channel measurement at a designated pilot position in the fifth number of pilot positions.

Optionally, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

This embodiment also provides a channel state measurement pilot processing device, which is used to implement the above embodiments and optional implementation manners, which have already been described and will not be repeated. As used below, the terms "module" and "unit" may be a combination of software and/or hardware that realizes a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware are also possible and contemplated.

Fig. 4 is a structure diagram 1 of a device for processing channel state measurement pilots according to an embodiment of the present invention. The device is located at the base station side. The frequency is divided into a specified number of groups, wherein the channel state measurement pilot is a predetermined number of dimensions, and the predetermined number is the number of antennas of the base station; the sending module 44 is coupled and connected with the division module 42, and is used to send the channel state to the terminal respectively according to the specified number of groups Measurement pilot, wherein the channel state measurement pilot is used to instruct the terminal to perform channel measurement; the first receiving module 46 is coupled and connected to the sending module 44, and is used to receive channel state information fed back by the terminal, wherein the channel state The information is used to instruct the base station to perform precoding processing on the terminal.

Optionally, the specified number of channel state measurement pilots includes: a first number of first-type channel state measurement pilots and a second number of second-type channel state measurement pilots; wherein, from the first type of channel state One element is selected from each group of measurement pilots to respectively form a second quantity group of channel state measurement pilots of the second type. Wherein, the number of each group of channel state measurement pilots in the specified number of groups is equal, and the sum of dimensions of the specified number of channel state measurement pilots is greater than a predetermined number.

The sending module 42 of this embodiment optionally includes: a first sending unit, configured to send channel state measurement pilots to the terminal at a predetermined period on the third number of subframes and according to a specified number of groups; or a second sending unit , for sending channel state measurement pilots to the terminal on the fourth number of resource blocks RB according to the specified number of groups; or, the third sending unit is used to use the fifth number of pilot positions to respectively send the channel state measurement pilots to the terminal according to the specified number of groups Send channel state measurement pilot.

Optionally, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

Fig. 5 is a structural block diagram 2 of a device for processing channel state measurement pilots according to an embodiment of the present invention. The device is located at the terminal side. A specified number of channel state measurement pilots, wherein the channel state measurement pilots are a predetermined number of dimensions, and the predetermined number is the number of antennas of the base station; the execution module 54 is coupled and connected with the second receiving module 52, and is used to use the channel state measurement pilots Perform channel measurement frequently and feed back channel state information to the base station.

Optionally, the receiving module 52 may include: a first receiving unit, configured to receive a specified number of groups of channel state measurement pilots sent by the base station on a third number of subframes; or, a second receiving unit, configured to receive A specified number of channel state measurement pilots sent on the fourth number of resource blocks RB; or, a third receiving unit configured to receive a specified number of channel state measurement pilots sent by the base station at the fifth number of pilot positions.

Optionally, the execution module 54 may include: a first execution unit, configured to perform channel measurement on subframes; or, a second execution unit, configured to perform channel measurement on designated RBs in the fourth number of resource blocks RB measurement; or, a third executing unit, configured to perform channel measurement at a specified pilot position in the fifth number of pilot positions.

Optionally, the channel state measurement pilot includes at least one of the following: a channel state information reference signal CSI-RS, and a cell-specific reference signal CRS.

The present invention is illustrated below in conjunction with optional embodiments of the present invention;

This optional embodiment provides a method for processing channel state measurement pilots, and the method in this optional embodiment includes:

Step S302: The base station eNB sends Nt-dimensional channel state measurement pilots to the terminal UE, and the base station eNB divides the Nt-dimensional channel state measurement pilots into M groups and sends them to the terminal UE respectively; wherein, M is a positive integer greater than 1. The M groups of channel state measurement pilots are composed of P groups of first-type channel state measurement pilots and Q groups of second-type channel state measurement pilots. Any channel state measurement pilot of the second type is composed of n elements in each group of N groups of channel state measurement pilots of the first type. Wherein P and Q are positive integers, and P+Q=M; where P≥N≥2, n≥1, and Nt is the number of antennas of the base station.

Step S304: The terminal UE receives the channel measurement pilot sent by the base station, uses the pilot to perform channel measurement, and feeds back channel state information reference signal CSI information to the base station. The base station synthesizes Nt-dimensional CSI information according to the CSI information fed back by the terminal and pilot grouping conditions, and uses the Nt-dimensional CSI information to precode the terminal.

Optionally, the number N of remaining groups in this optional embodiment and the number n of elements in each group in the remaining groups can be configured by the base station, and the base station sends M groups of channel state measurement guides to the terminal on N1 subframes respectively. where N1 is a positive integer; N1 is a positive integer less than or equal to M; N1 subframes are sent periodically; the sending period T of N1 subframes is configured by the base station eNB;

Among M groups of channel measurement pilots, each group contains k _m -dimensional channel measurement pilots; where k _m is a positive integer, m=1...M; k _m are all equal; where m=1...M; the channels of M groups Sum of measured pilot dimensions greater than Nt;

The base station sends M groups of channel state measurement pilots to the terminal eNB on the N2 resource blocks RB; where N2 is a positive integer, and the N2 is a positive integer less than or equal to M;

Optionally, the base station eNB uses N3 sets of pilot positions to send M sets of channel state measurement pilots to the terminal eNB respectively; where N3 is a positive integer; N3 is a positive integer less than or equal to M; the number of groups M, N1, N2, N3, Can be configured by the base station;

Optionally, the base station notifies the terminal of the N2 RB positions, and the terminal performs channel measurement at predetermined RB positions, and feeds back channel state information to the base station;

Optionally, the base station notifies the terminal of the N3 sets of pilots, and the terminal performs channel measurement at a predetermined pilot position, and feeds back channel state information to the base station;

Optionally, the channel state measurement pilot includes at least CSI-RS; or, the channel state measurement pilot includes at least CRS;

The following describes this optional embodiment in detail in combination with optional implementation manners of this optional embodiment;

Optional implementation mode 1

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, where M=5, and each group is 4Tx measurement pilots (the measurement pilots can be CRS or CSI-RS). M=1-4 are the first type of measurement pilots, and M=5 is the second type of measurement pilots. Among them, the corresponding relationship between antenna numbers and group numbers is shown in Table 1-1:

M group number Antenna number 1 0 1 2 3 2 4 5 6 7 3 8 9 10 11 4 12 13 14 15 5 04812

The terminal receives the 4Tx measurement pilot, uses the pilot to perform channel measurement, obtains the 4Tx codebook, CQI and RI, and feeds back CSI information to the base station respectively.

The base station receives 5 pieces of CSI information respectively at predetermined positions, the base station uses the CQI in the 5 pieces of CSI information to obtain the total CQI, uses the RI in the 5 pieces of CSI information to obtain the total RI; uses the PMI in the 5 pieces of CSI information to obtain the total PMI.

The base station uses the obtained total channel information to perform precoding processing on the terminal.

Optional implementation mode 2

The number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2. The base station sends 32Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, where M=5, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI-RS ). Among them, the corresponding relationship between antenna numbers and group numbers is shown in Table 2-1:

Group No Antenna number 1 0 1 2 3 4 5 6 7 2 8 9 10 11 12 13 14 15 3 16 17 18 19 20 21 22 23 4 24 25 26 27 28 29 30 31 5 0 8 16 24

The terminal receives the measurement pilot, uses the pilot to perform channel measurement, obtains CSI information, and feeds back the CSI information to the base station respectively; Table 2-2: 8Tx rank1-2 codebook:

v _m ＝[1 e ^j2πm/32 e ^j4πm/32 e ^j6πm/32 ] ^T

Table 2-3: 4Tx rank1-2 codebook

The base station obtains the CSI information fed back by the terminal at a predetermined position, assuming:

M=1, RI=1, PMI=0;

M=2, RI=1, PMI=0;

M=3, RI=1, PMI=1;

M=4, RI=1, PMI=4;

M=5, RI=1, PMI=0.

The base station receives 5 pieces of CSI information respectively, the base station uses the CQI in the 5 pieces of CSI information to obtain the total CQI, uses the RI in the 5 CSI information to obtain the total RI, and uses the PMI in the 5 CSI information to obtain the total PMI.

The calculation method is as follows:

The five codewords obtained are:

[1 1 1 1 1 1 1 1] ^T , [1 1 1 1 1 1 1 1] ^T , [1 1 1 1 jjjj] ^T ,

${\left[\begin{array}{cccccccc}\mathrm{<span\; class="notranslate">\; 1</span>}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 3</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& \mathrm{<span\; class="notranslate">\; 1</span>}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 3</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}\end{array}\right]}^{\mathrm{<span\; class="notranslate">\; T</span>}}<span\; class="notranslate">\; ,</span>{\left[\begin{array}{cccc}\mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}\end{array}\right]}^{\mathrm{<span\; class="notranslate">\; T</span>}}$

The base station first uses the first 4 codewords to synthesize

$\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\sqrt{\mathrm{<span\; class="notranslate">\; 32</span>}}}{\left[\begin{array}{ccccccccccccccccccccccccccccccc}\mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 11</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& \mathrm{<span\; class="notranslate">\; j</span>}& \mathrm{<span\; class="notranslate">\; j</span>}& \mathrm{<span\; class="notranslate">\; j</span>}& \mathrm{<span\; class="notranslate">\; j</span>}& \mathrm{<span\; class="notranslate">\; 1</span>}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 3</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& \mathrm{<span\; class="notranslate">\; 1</span>}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}& {\mathrm{<span\; class="notranslate">\; e</span>}}^{\mathrm{<span\; class="notranslate">\; j</span>}\frac{\mathrm{<span\; class="notranslate">\; 3</span>}\mathrm{<span\; class="notranslate">\; \&pi;</span>}}{\mathrm{<span\; class="notranslate">\; 16</span>}}}\end{array}\right]}^{\mathrm{<span\; class="notranslate">\; T</span>}}$

Finally, the 4-antenna codebook is used to adjust the phase between the antennas to obtain the final codeword.

The base station uses the obtained total channel information to perform precoding processing on the terminal.

Optional implementation mode 3

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1. The base station sends 16Tx channel state measurement pilots to the terminal UE. The base station divides the channel measurement pilots into M groups. The number of base station groups M can be configured by the base station. For example, Table 3-1: M value configuration table on the base station side:

For example, M=3, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots may be CRS or CSI-RS). Fig. 6 is a schematic diagram of the base station sending channel state measurement pilots to the terminal respectively on three TTIs according to an optional embodiment of the present invention. As shown in Fig. 6, the base station sends M=1 8Tx pilots on TTI1, 8Tx pilots with M=2 are sent, and 4Tx pilots with M=3 are sent on TTI3.

The terminal obtains the pilot frequency, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in optional embodiment 2. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 4

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example, M=3, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI- RS). The base station sends channel state measurement pilots to the terminal on three TTIs respectively. As shown in Figure 5, the base station sends M=1 8Tx pilots on TTI1, sends M=2 8Tx pilots on TTI2, and sends M=2 8Tx pilots on TTI3. 4Tx pilots with M=3 are sent. Among them, TTI1-3 can be transmitted periodically, and the transmission period is set to T. Figure 7a is a schematic diagram of non-continuous TTI according to an optional embodiment of the present invention, and Figure 7b is an aperiodic transmission according to an optional embodiment of the present invention The discontinuous TTI schematic diagram 1, as shown in Figures 7a and 7b:

The terminal obtains the pilot frequency, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in optional embodiment 2. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 5

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example, M=3, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI- RS). The base station sends channel state measurement pilots to the terminal on 3 TTIs respectively. The base station sends M=1 8Tx pilots on TTI1, M=2 8Tx pilots on TTI2, and M=3 4Tx pilots on TTI3 pilot. Among them, TTI1-3 can be transmitted periodically, and the transmission period is set to T. Figure 8a is a schematic diagram of non-continuous TTI according to an optional embodiment of the present invention. Figure 8b is an aperiodic transmission according to an optional embodiment of the present invention. The discontinuous TTI schematic diagram II, as shown in Figures 8a and 8b:

The transmission period of the pilot is configured by the base station, as shown in Table 5-1 Base station configuration pilot transmission period:

Index period (TTI) 0 5 1 10 2 15 3 20

For example, if the base station selects period configuration 1 at this time, the base station sends M measurement pilots to the terminal every 10 TTIs.

The terminal obtains the pilot frequency, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information, and the calculation method is as shown in optional embodiment 2. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 6

The number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 4. The base station sends 32Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example, M=5, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI- RS). The base station sends channel state measurement pilots to the terminal on five RBs respectively. FIG. 9 is a schematic diagram of sending pilots on RBs according to an optional embodiment of the present invention. As shown in FIG. 9, the base station sends 8 Tx pilots on RB1-4. frequency, send 4Tx pilot on RB5.

The terminals respectively obtain the pilot frequency, measure the channel state, and feed back the channel state information CSI respectively. The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 7

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=3, and each group is 8Tx or 2Tx measurement pilot CSI-RS. One RB of the base station uses 3 sets of pilots to send channel state measurement pilots to the terminal respectively. Figure 10 is a schematic diagram of the position of the CSI-RS RE according to an optional embodiment of the present invention. As shown in Figure 10, the base station is on RB1-4 Send 8Tx pilot, send 4Tx pilot on RB5.

In Figure 10, the base station uses the CSI-RS pattern of #0 to send the CSI-RS of M=1 8Tx, the base station uses the CSI-RS pattern of #1 to send the CSI-RS of M=2 8Tx, and the base station uses the CSI-RS pattern of #2 The CSI-RS pattern sends 2 Tx CSI-RS with M=3.

The terminal obtains the pilot frequency, measures the channel state, and feeds back the channel state information CSI respectively. The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 8

The number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2. The base station sends 32Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=5, and each group is 8Tx or 4Tx measurement pilot CSI-RS. The base station uses multiple sets of pilots to send channel state measurement pilots to the terminal on multiple TTIs. Figure 11 is a schematic diagram of the base station sending CSI-RS according to an optional embodiment of the present invention. As shown in Figure 11, the base station is on TTI1 Send 3 sets of pilots and 2 sets of pilots on TTI2.

In Figure 11, the base station uses #0 CSI-RS pattern to send M=1 8Tx CSI-RS in the first TTI, and the base station uses #1 CSI-RS pattern to send M=2 8Tx CSI-RS For RS, the base station uses the #2 CSI-RS pattern to send M=5 4Tx CSI-RS. In the second TTI, the base station uses the #0 CSI-RS pattern to send M=3 8Tx CSI-RS, and uses the #1 CSI-RS pattern to send M=4 8Tx CSI-RS.

The terminal obtains the pilot frequency at the position of the CSI-RS RE respectively, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 9

The number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 2. The base station sends 32Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=5, and each group is 8Tx or 4Tx measurement pilot CSI-RS. The base station uses multiple sets of pilots on multiple TTIs to send channel state measurement pilots to the terminal respectively. Figure 12 is a second schematic diagram of the base station sending CSI-RS according to an optional embodiment of the present invention. As shown in Figure 12, the base station is on RB1 Send 2 sets of pilots, and send 2 sets of pilots on RB2.

In Figure 12, the base station uses the CSI-RS pattern of #0 to send the 8Tx CSI-RS of M=1 in the first RB, and the base station uses the CSI-RS pattern of #1 to send the CSI-RS of 8Tx of M=2. RS: In the second RB, the base station uses the #0 CSI-RS pattern to send M=3 8Tx CSI-RS, the base station uses #1 CSI-RS pattern to send M=4 8Tx CSI-RS, the base station Using the #2 CSI-RS pattern to send M=5 4Tx CSI-RS.

The terminal obtains the pilot frequency at the position of the CSI-RS RE, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 10

The number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2. The base station sends 64Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=9, and each group is 8Tx measurement pilot CSI-RS. The base station uses multiple RBs to send channel state measurement pilots to the terminal on multiple TTIs. FIG. 13 is a schematic diagram of the base station sending CSI-RS according to an optional embodiment of the present invention. As shown in FIG. 13, the base station uses 5 sets of pilots are sent by 5 RBs, and 4 sets of pilots are sent by using 4 RBs on TTI2.

The terminal obtains the pilot frequency at the set position, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal at predetermined positions, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 11

The number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2. The base station sends 64Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=9, and each group is 8Tx measurement pilot CSI-RS. The base station uses multiple sets of pilots on multiple RBs of multiple TTIs to send channel state measurement pilots to the terminal respectively. FIG. 14 is a schematic diagram 4 of the base station sending CSI-RS according to an optional embodiment of the present invention, as shown in FIG. 14 , The base station sends 2 sets of pilots on RB1 on TTI1 and 3 sets of pilots on RB2; the base station sends 2 sets of pilots on RB1 on TTI2 and 2 sets of pilots on RB2.

In Figure 14, the base station uses the #0 CSI-RS pattern to send M=1 8Tx CSI-RS in RB1 of the first TTI, and the base station uses #1 CSI-RS pattern to send M=2 8Tx CSI-RS CSI-RS: The base station uses the #0 CSI-RS pattern to send M=3 8Tx CSI-RS in RB2, the base station uses #1 CSI-RS pattern to send M=4 8Tx CSI-RS, the base station uses The CSI-RS pattern of #2 sends 8 Tx CSI-RS with M=5. In RB1 of the second TTI, the base station uses #0 CSI-RS pattern to send M=6 8Tx CSI-RS, and the base station uses #1 CSI-RS pattern to send M=7 8Tx CSI-RS; In RB2, the CSI-RS pattern of #0 is used to transmit the CSI-RS of 8 Tx with M=8, and the base station uses the CSI-RS pattern of #1 to transmit the CSI-RS of 8 Tx with M=9.

The terminal obtains the pilot frequency at the position of the CSI-RS RE, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal at a predetermined position, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 12

The number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2. The base station sends 64Tx channel state measurement pilots to the terminal UE. The base station uses multiple sets of pilots on multiple RBs of multiple TTIs to respectively send channel state measurement pilots to the terminal. The base station configures the number of TTIs N1 used to send pilots for the terminal. , Table 12-1: The base station configures the M value and TTI number, as shown in Table 12-1:

As shown in Table 12-1, the base station configures the terminal with 64Tx Index=0, that is, selects M=9, and completes the transmission within 2 TTIs. Figure 15 shows the base station sending CSI- RS schematic diagram 5, assuming that the transmission pilot pattern is shown in Figure 15, two sets of pilots are sent on RB1 on TTI1, and three sets of pilots are sent on RB2; the base station sends two sets of pilots on RB1 on TTI2, and the 2 sets of pilots are sent on RB2.

In Figure 15, the base station uses the #0 CSI-RS pattern to send M=1 8Tx CSI-RS in RB1 of the first TTI, and the base station uses #1 CSI-RS pattern to send M=2 8Tx CSI-RS CSI-RS: The base station uses the #0 CSI-RS pattern to send M=3 8Tx CSI-RS in RB2, the base station uses #1 CSI-RS pattern to send M=4 8Tx CSI-RS, the base station uses The CSI-RS pattern of #2 sends 8 Tx CSI-RS with M=5. In RB1 of the second TTI, the base station uses #0 CSI-RS pattern to send M=6 8Tx CSI-RS, and the base station uses #1 CSI-RS pattern to send M=7 8Tx CSI-RS; In RB2, the CSI-RS pattern of #0 is used to transmit the CSI-RS of 8 Tx with M=8, and the base station uses the CSI-RS pattern of #1 to transmit the CSI-RS of 8 Tx with M=9.

The terminal obtains the pilot frequency at the position, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal at a predetermined position, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Alternative Embodiment 13

The number of antennas of the base station eNB is 64, and the number of receiving antennas of the terminal is 2. The base station sends 64Tx channel state measurement pilots to the terminal UE. The base station uses multiple sets of pilots on multiple RBs of multiple TTIs to respectively send channel state measurement pilots to the terminal. The base station configures the number of RBs N2 used to send pilots for the terminal. , Table 13-1: The base station configures the M value and the number of RBs, as shown in Table 13-1:

As shown in Table 13-1, the base station configures 64Tx Index=0 for the terminal, that is, selects M=9, and sends it within 3 RBs. Figure 16 shows the measurement pilot sent by the base station according to an optional embodiment of the present invention As a schematic diagram, it is assumed that the transmission pilot pattern is shown in Figure 16, and three RBs are used to transmit pilots on TTI1-TTI3 respectively.

The terminal obtains the pilot frequency at the position where the pilot frequency is measured, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal at a predetermined position, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 14

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2. The base station sends 16Tx channel state measurement pilots to the terminal UE. The base station uses multiple sets of pilots to send channel state measurement pilots to the terminal respectively. The base station configures the number of sets N3 used to send pilots for the terminal. Table 14-1: Base station configuration M The value and number of sets are shown in Table 14-1:

As shown in Table 14-1, the base station configures 16Tx Index=0 for the terminal, that is, selects M=3, and uses 3 sets of pilots to send channel state pilots. Figure 17 shows the CSI according to an optional embodiment of the present invention - A schematic diagram of the location of the RS RE, as shown in Figure 17. In the figure, #0 and yellow CSI-RS RE positions are used to transmit 8Tx CSI-RS, and #2 RE position is used to transmit 2Tx measurement pilot.

The terminal obtains the pilot frequency at the position where the pilot frequency is measured, measures the channel state, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 15

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 1. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example, M=3, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI- RS). The base station sends channel state measurement pilots to the terminal on 3 TTIs respectively. The base station sends M=1 8Tx pilots on TTI1, M=2 8Tx pilots on TTI2, and M=3 4Tx pilots on TTI3 pilot. Among them, TTI1-3 can be transmitted periodically, and the transmission period is set to T. Figure 18a is a schematic diagram of continuous TTIs transmitted periodically according to an optional embodiment of the present invention. Figure 18b is a non-periodic transmission according to an optional embodiment of the present invention. Continuous TTI schematic diagram three, as shown in Figures 18a and 18b:

The transmission period of the pilot is configured by the base station, Table 15-1: The base station configures the transmission period of the pilot, as shown in Table 15-1:

Index period (TTI)

0 5 1 10 2 15 3 20

For example, if the base station selects period configuration 1 at this time, the base station sends M measurement pilots to the terminal every 10 TTIs.

The base station notifies the terminal UE of information such as the number of groups M and the location of the TTI.

The terminal obtains channel state information pilots at predetermined positions, measures the channel state according to the period T, etc., and feeds back the channel state information CSI in groups.

The base station respectively receives the CSI information fed back by the terminal at a predetermined position, and synthesizes total CSI information according to the CSI information. The calculation method is as shown in optional embodiment 2, and the base station performs precoding processing on the terminal according to the total CSI information.

Alternative Embodiment 16

The number of antennas of the base station eNB is 32, and the number of receiving antennas of the terminal is 4. The base station sends 32Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example, M=5, and each group is 8Tx or 4Tx measurement pilots (the measurement pilots can be CRS or CSI- RS). The base station sends channel state measurement pilots to the terminal on five RBs respectively. Figure 19 is a schematic diagram of sending pilots on RBs according to an optional embodiment of the present invention. As shown in Figure 19, the base station sends 8Tx pilots on RB1-4. frequency, send 4Tx pilot on RB5. The base station notifies the terminal of the number M of groups and the RB position of the pilot.

The terminal obtains pilots at predetermined RB positions, respectively measures the channel state information, and feeds back the channel state information CSI respectively. The base station respectively receives the CSI information fed back by the terminal, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Optional implementation mode 17

The number of antennas of the base station eNB is 16, and the number of receiving antennas of the terminal is 2. The base station sends 16Tx channel state measurement pilots to the terminal UE, and the base station divides the channel measurement pilots into M groups, for example M=3, and each group is 8Tx or 2Tx measurement pilot CSI-RS. Three sets of pilots are used on one RB of the base station to send channel state measurement pilots to the terminal respectively. Figure 20 is a schematic diagram of the location of CSI-RS REs according to an optional embodiment of the present invention. As shown in Figure 20, the base station is on RB1-4 Send 8Tx pilot, send 4Tx pilot on RB5. The base station notifies the terminal of the pilot grouping situation M and the number and position of the pilot sets used.

In Figure 20, the base station uses the CSI-RS pattern of #0 to send the CSI-RS of M=1 8Tx, the base station uses the CSI-RS pattern of #1 to send the CSI-RS of M=2 8Tx, and the base station uses the CSI-RS pattern of #2 The CSI-RS pattern sends 2 Tx CSI-RS with M=3.

The terminal respectively obtains the pilot frequency at the predetermined position, measures the channel state respectively, and feeds back the channel state information CSI respectively.

The base station respectively receives the CSI information fed back by the terminal at a predetermined position, and synthesizes the total CSI information according to the CSI information. The base station performs precoding processing on the terminal according to the total CSI information.

Fig. 21 is a schematic diagram of different 64Tx codebooks and channel correlation coefficients according to an optional embodiment of the present invention. As shown in Fig. 21, the channel is a related channel, and the transmitting antennas are 64 antennas and 8 antennas, and different 64 antennas are compared. and codebook and channel correlation under the codebook feedback method. The rightmost line in Figure 1 is the matching degree between the current R128Tx codebook and the channel, and the second line on the right is the correlation coefficient between the selected codebook and the channel under the channel state information transmission and feedback method described in this embodiment . The first line on the left indicates that the codebook is randomly generated when there are 64 antennas; the second line on the left indicates that the 8Tx codebook of R12 is randomly combined to obtain a 64Tx codebook.

It can be seen from Figure 21 that although the number of antennas has increased to 64 antennas, the correlation coefficient is not much different from that of the 8Tx R12 codebook. The performance is much better than the 64Tx codebook with the two lines on the left.

Through this optional embodiment, the terminal activates the unlicensed carrier by itself, which can make better use of the resource obtained in competition compared with the related art.

In another embodiment, software is also provided, and the software is used to implement the technical solutions described in the above embodiments and preferred implementation manners.

In another embodiment, there is also provided a storage medium, in which the software is stored, the storage medium includes but not limited to: optical discs, floppy disks, hard disks, rewritable memories, and the like.

Obviously, those skilled in the art should understand that each module or each step of the present invention can be realized by a general-purpose computing device, and they can be concentrated on a single computing device, or distributed on a network formed by multiple computing devices , alternatively, they may be implemented in program code executable by a computing device, thus, they may be stored in a storage device to be executed by a computing device, and in some cases may be executed in an order different from that here The steps shown or described are realized by making them into respective integrated circuit modules, or making multiple modules or steps among them into a single integrated circuit module. As such, the present invention is not limited to any specific combination of hardware and software.

The foregoing are only optional embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (22)

1. the processing method of a channel status measurement pilot tone, it is characterised in that also include:

Channel status is measured pilot tone and is divided into specified quantity group by base station, and wherein, described channel status measurement is led Frequency is tieed up for predetermined quantity, and this predetermined quantity is the antenna amount of described base station；

Described base station sends described channel status to terminal respectively according to described specified quantity group and measures pilot tone, Wherein, described channel status measurement pilot tone is used for indicating described terminal to perform channel measurement；

Described base station receives the channel condition information of described terminal feedback, wherein, described channel condition information For indicating described base station that described terminal is performed precoding processing；

Wherein, described specified quantity group channel status measurement pilot tone includes: the first kind letter of the first sets of numbers The Equations of The Second Kind channel status of road state measurement pilot tone and the second sets of numbers measures pilot tone；Wherein, described second The described Equations of The Second Kind channel status of sets of numbers is measured pilot tone and is measured pilot tone by from described first kind channel status Often group in choose one or more element and separately constitute.

Method the most according to claim 1, it is characterised in that the channel status of described specified quantity group is measured The quantity of each group of channel measurement pilot frequency in pilot tone is equal.

Method the most according to claim 1, it is characterised in that the channel status of described specified quantity group is measured The dimension sum of pilot tone is more than described predetermined quantity.

Method the most according to claim 1, it is characterised in that described base station is according to described specified quantity component Do not send described channel status measurement pilot tone to terminal to include:

Described base station in the 3rd quantity subframe with predetermined period and according to described specified quantity group respectively Send described channel status to described terminal and measure pilot tone.

Method the most according to claim 1, it is characterised in that described base station is according to described specified quantity component Do not send described channel status measurement pilot tone to terminal to include:

Described base station on the 4th quantity Resource Block RB according to described specified quantity group respectively to described end End sends described channel status and measures pilot tone.

Method the most according to claim 1, it is characterised in that described base station is according to described specified quantity component Do not send described channel status measurement pilot tone to terminal to include:

Described base station uses the 5th quantity pilot frequency locations according to described specified quantity group respectively to described end End sends described channel status and measures pilot tone.

7. according to the method described in any one of claim 1 to 6, it is characterised in that described channel status measurement is led Frequency includes at least one of: channel state information reference signals CSI-RS, the reference signal of cell-specific CRS。

8. the processing method of a channel status measurement pilot tone, it is characterised in that also include:

Terminal receives the specified quantity group channel status measurement pilot tone that base station sends, wherein, described channel shape It is predetermined quantity dimension that state measures pilot tone, and this predetermined quantity is the antenna amount of described base station；

Described terminal is measured pilot tone according to described channel status and is performed channel measurement, and to described base station feedback Channel condition information.

Method the most according to claim 8, it is characterised in that terminal receives the specified quantity group that base station sends Channel status is measured the mode of pilot tone and is included one below:

Described terminal receives the described specified quantity group letter that described base station sends in the 3rd quantity subframe Road state measurement pilot tone；

Described terminal receives the described specified quantity that described base station sends on the 4th quantity Resource Block RB Group channel status measures pilot tone；

Described terminal receives the described specified quantity that described base station sends in the 5th quantity pilot frequency locations Group channel status measures pilot tone.

Method the most according to claim 9, it is characterised in that described terminal is measured according to described channel status Pilot tone performs the mode of channel measurement and includes one below:

Described terminal performs channel measurement in described subframe；

Channel measurement is performed on described terminal appointment RB in described 4th quantity Resource Block RB；

Perform channel in described terminal appointment pilot frequency locations in described 5th quantity pilot frequency locations to survey Amount.

11. according to Claim 8 to the method described in 10 any one, it is characterised in that described channel status is measured Pilot tone includes at least one of: channel state information reference signals CSI-RS, the reference of cell-specific are believed Number CRS.

12. 1 kinds of channel status measure the processing means of pilot tone, are positioned at base station side, it is characterised in that also include:

It is divided into module, is divided into specified quantity group, wherein, described channel for channel status is measured pilot tone State measurement pilot tone is predetermined quantity dimension, and this predetermined quantity is the antenna amount of described base station；

Sending module, measures for sending described channel status to terminal respectively according to described specified quantity group Pilot tone, wherein, described channel status is measured pilot tone and is used for indicating described terminal to perform channel measurement；

First receiver module, for receiving the channel condition information of described terminal feedback, wherein, described letter Channel state information is used for indicating described base station that described terminal is performed precoding processing；

Wherein, described specified quantity group channel status measurement pilot tone includes: the first kind letter of the first sets of numbers The Equations of The Second Kind channel status of road state measurement pilot tone and the second sets of numbers measures pilot tone；Wherein, described second The described Equations of The Second Kind channel status of sets of numbers is measured pilot tone and is measured pilot tone by from described first kind channel status Often group in choose one or more element and separately constitute.

13. devices according to claim 12, it is characterised in that the channel status of described specified quantity group is surveyed The quantity of each group of channel measurement pilot frequency in amount pilot tone is equal.

14. devices according to claim 12, it is characterised in that the channel status of described specified quantity group is surveyed The dimension sum of amount pilot tone is more than described predetermined quantity.

15. devices according to claim 12, it is characterised in that described sending module includes:

First transmitting element, is used in the 3rd quantity subframe with predetermined period and according to described appointment number Amount group sends described channel status to described terminal respectively and measures pilot tone.

16. devices according to claim 12, it is characterised in that described sending module includes:

Second transmitting element, is used on the 4th quantity Resource Block RB according to described specified quantity component Do not send described channel status to described terminal and measure pilot tone.

17. devices according to claim 12, it is characterised in that described sending module includes:

3rd transmitting element, for using the 5th quantity pilot frequency locations according to described specified quantity group respectively Send described channel status to described terminal and measure pilot tone.

18. according to the device described in any one of claim 12 to 17, it is characterised in that described channel status is measured Pilot tone includes at least one of: channel state information reference signals CSI-RS, the reference of cell-specific are believed Number CRS.

19. 1 kinds of channel status measure the processing means of pilot tone, are positioned at end side, it is characterised in that also include:

Second receiver module, for receiving the specified quantity group channel status measurement pilot tone that base station sends, its In, it is predetermined quantity dimension that described channel status measures pilot tone, and this predetermined quantity is the antenna number of described base station Amount；

Perform module, perform channel measurement for measuring pilot tone according to described channel status, and to described base Stand feeding back channel state information.

20. devices according to claim 19, it is characterised in that described second receiver module includes with purgation One:

First receives unit, for receiving the described appointment that described base station sends in the 3rd quantity subframe Sets of numbers channel status measures pilot tone；

Second receives unit, for receiving the institute that described base station sends on the 4th quantity Resource Block RB State specified quantity group channel status and measure pilot tone；

3rd receives unit, for receiving described in described base station sends in the 5th quantity pilot frequency locations Specified quantity group channel status measures pilot tone.

21. devices according to claim 20, it is characterised in that described execution module includes one below:

First performance element, for performing channel measurement in described subframe；

Second performance element, performs letter on the appointment RB in described 4th quantity Resource Block RB Road is measured；

3rd performance element, holds in the appointment pilot frequency locations in described 5th quantity pilot frequency locations Row channel measurement.

22. according to the device described in any one of claim 19 to 21, it is characterised in that described channel status is measured Pilot tone includes at least one of: channel state information reference signals CSI-RS, the reference of cell-specific are believed Number CRS.