WO2014012509A1

WO2014012509A1 - Method and device for reporting and determining channel quality indicator information

Info

Publication number: WO2014012509A1
Application number: PCT/CN2013/079646
Authority: WO
Inventors: 倪浩; 高秋彬; 彭莹
Original assignee: 电信科学技术研究院
Priority date: 2012-07-20
Filing date: 2013-07-19
Publication date: 2014-01-23
Also published as: CN103580779A; CN103580779B

Abstract

The present invention relates to the field of wireless communications. Disclosed in an embodiment of the present invention are a method and device for reporting and determining channel quality indicator (CQI) information for coordinated multi-point transmission, used to save resources required for reporting the CQI information. In the method, a network side configures a plurality of channel state information (CSI) processes for a user equipment (UE), and configures differential CQI reference information for each CSI process; the UE determines the differential CQI information corresponding to the CSI process according to the differential CQI reference information corresponding to the CSI process, carries the differential CQI information in the CSI, and reports the CSI to the network side; the network side determines the CQI information corresponding to the CSI process according to the differential CQI information corresponding to the CSI process and the differential CQI reference information corresponding to the CSI process. The present invention saves system resources.

Description

Method and device for reporting and determining the channel shield indication information This application claims to be submitted to the Chinese Patent Office on July 20, 2012, with the application number 201210254684.9, and the invention name is

The priority of the Chinese Patent Application for the Disclosure of the Channel Quality Information and the Method and Apparatus for the Determination of the Channel is incorporated herein by reference. The present invention relates to the field of wireless communication technologies, and in particular, to a channel shield indication information reporting and determining method and device. BACKGROUND In a long term evolution-advance (LTE-A) system, in order to reduce the neighboring area of a cell coverage edge user terminal (UE), and improve the experience of a cell edge user terminal, a coordinated multipoint is used. Coordinated Multiple Points Transmission/Reception (CoMP) technology. Cooperative multipoint transmission technology is the collaboration between multiple transmission points (TPs) that are geographically separated. Generally, multiple transmission points refer to base stations of different cells, or base stations of one cell and a plurality of remote radio heads (RRHs) controlled by the same. The cooperative multi-point transmission technology can be divided into downlink coordinated multi-point transmission and uplink joint reception. Downlink cooperative multi-point transmission is mainly divided into two transmission schemes: coordinated scheduling/coordinated beamforming (CS/CB) and joint processing (JP). One of the multiple transmission points in the CS/CB transmission transmits a useful signal to the user terminal, and the other transmission points minimize the interference to the user terminal through joint scheduling and beamforming. The joint processing scheme can be further divided into joint transmission (JT) and dynamic point selection (DPS). A plurality of transmission points in the JT transmission simultaneously transmit a useful signal to the user terminal, thereby enhancing the reception signal of the user terminal. The DPS transmits a transmission point of the dynamic switching user terminal, and always selects a transmission point of the user terminal that is optimal for the user terminal from the coordinated transmission point. These collaborative multipoint transmission schemes can be used in conjunction with each other. It is also possible to dynamically set certain transmission points to not transmit signals on certain time-frequency resources in combination with the dynamic blanking (DB) scheme.

To support coordinated multipoint transmission, the network configures one or more downlink reference signal resources for channel measurement, such as non-zero power channel state information-reference signal (NZP CSI-RS). Resources. The user terminal measures the reference signal resource by using the downlink channel configured by the network, and can measure the downlink channel of each transmission point. The network also configures one or more downlink reference signal resources (IMRs) for the interference measurement according to the supported CoMP transmission scheme, and the user terminal uses the interference measurement downlink reference signal resource to measure one or more thousand The interference condition under the assumption of the disturbance signal. Define a channel status information The process, a channel state information reference signal resource corresponding to the network configuration and a interference signal hypothesis. The user terminal can obtain channel state information of each transmission point under one or more interference signal assumptions, including channel shield quantity indication information, according to the measured interference of each transmission point downlink channel and each interference signal hypothesis ( Channel Quality Indicator, CQI). An example of a calculation such as CQI is:

, J

among them' . (^^ denotes the CQI sequence number of the NZP CSI-RS resource m in the frequency band k under the interference signal hypothesis n, !^ denotes the downlink signal power measured by the user terminal with the NZP CSI-RS resource m on the frequency band k, I _kn denotes The interference signal measured by the user terminal in the frequency band k assumes the interference power of n, 20 is the CQI quantization function, and the frequency band k may be the entire system frequency band or a certain sub-band of the system frequency band. It should be noted that the above process Each transmission point corresponds to one reference signal resource, and may include one or more physical transmission points; each of the interference signals is assumed to correspond to one interference measurement reference signal resource. The network configures three transmission points for the UE as an example, Table 1 gives the possible signal and interference assumptions for CQI.

Table 1

Transmission signal hypothesis

TP1 TP2 TP3 TP1 TP2 TP3

CQI1 signal Off On Off

CQI2 signal Off Off On

CQI3 signal Off On On

CQI4 signal Off Off Off

CQI5 signal On Off Off

CQI6 signal Off Off On

CQI7 signal On Off On

CQI8 signal Off Off Off

CQI9 signal On Off Off

CQI10 signal Off On Off

CQI11 signal On On Off

CQI12 signal Off Off Off As shown in Table 1, in the traditional single-cell transmission, the user terminal only needs to report the channel state information of one transmission point, and the coordinated multi-point transmission may need to report multiple transmission signal hypotheses and the interference signal hypothesis. Channel status information. The reporting overhead will also be much larger than the reporting overhead of a single cell transmission. Although the network can configure only part of the downlink reference signal resource and the IMR pair (hereinafter referred to as a resource pair) for the user terminal according to the supported transmission scheme, the user terminal only has 4 The channel state information of the resource pair configured by the network, but the reporting overhead of the coordinated multipoint transmission still significantly increases the power compared to the single cell transmission.

The channel state information is reported in a manner based on a period of the physical uplink control channel (PUCCH) or a non-period reporting based on a physical uplink shared channel (PUSCH). The network configures a channel state information reporting mode for each channel state information. Different channel state information may be configured with different upper mode, and the channel state information utilizes different upper modes. Different channel state information may also be configured in the same uplink mode, and channel state information configured in the same uplink mode is reported in the same reporting mode. The periodic report based on PUCCH includes the report mode 1-0, the report mode 1-1, the report mode 2-0, and the report mode 2-1. The reporting mode 1-1 also includes sub-mode 1 and sub-mode 2, which are used for transmission mode 9, and the channel state information of the base station 8 antenna port is reported. The above reporting modes include reporting type 1, la, reporting type 2, 2a, 2b, 2c, reporting type 3, upper 艮 type 4, upper 4 艮 type 5, and upper 4 艮 type 6, for upper 4 艮 CQI And a precoding matrix indicator (PMI)/rank indicator (RI), a precoding type indicator (PTI), and the like. The PUSCH-based aperiodic channel information reporting includes reporting mode 1-2, reporting mode 2-2, upper • mode 3-0, and upper mode 3-1.

In order to reduce the reporting overhead, the sub-band CQI reporting in the reporting mode of the non-periodic reporting is reported in the channel state information of the single cell transmission, and the sub-band differential CQI reporting is used. For example, in the non-periodic reporting mode 3-1, the 2-bit subband differential CQI of each codeword is the difference between the subband CQI sequence number and the wideband CQI sequence number of the corresponding codeword; the reporting mode of the non-periodic reporting is 2-2. The 2-bit differential CQI of the M subbands selected by the user of each codeword is the difference between the CQI sequence number of the M subbands selected by the user and the wideband CQI sequence number of the corresponding codeword.

The second codeword in the reporting mode reported in the partial period uses spatial differential CQI reporting. For example, in the reporting mode 1-1 of the periodic reporting, the broadband CQI/PMI is reported in a transmission mode other than the transmission mode 9 of the eight CSI-RS ports, or is reported in the transmission mode 9 of the eight CSI-RS ports. In the case of wideband CQI/2nd PMI, or when reporting wideband CQI/1st PMI for transmission mode 9 of 8 CSI-RS ports, if RI>1, the 3-bit wideband spatial difference CQI of the second codeword is the first The difference between the wideband CQI sequence number of 1 codeword and the wideband CQI sequence number of the 2nd codeword; in the upper 4艮 mode 2-1 of 4周期 on the cycle, in addition to the transmission mode 9 except 8 CSI-RS ports When the transmission mode reports the wideband CQI/PMI, or the transmission mode 9 of the 8 CSI-RS ports reports the wideband CQI/2nd PMI and the last reported PTI=1, or the transmission mode of 8 CSI-RS ports When the wideband CQI/2nd PMI is reported and the most recently reported PTI=0, if RI>1, the 3-bit wideband spatial difference CQI of the second codeword is the wideband CQI number and the second codeword of the first codeword. The difference of the wideband CQI sequence number; in the periodic reporting mode 2-1, the transmission is in addition to the transmission mode 9 of the eight CSI-RS ports. When the mode reports the CQI of the sub-band selected by the user terminal, or when the transmission mode 9 of the eight CSI-RS ports reports the sub-band CQI/the second PMI and the last reported PTI=1, if RI>1, the second The 3-bit subband spatial difference CQI of the codeword is the difference between the subband CQI sequence number of the first codeword and the subband CQI sequence number of the second codeword.

The differential CQI reporting method in single cell transmission is based on the correlation between the same transmission point subband and wideband CQI reporting. Or, based on the correlation of different codeword CQI reports reported by the same transmission point, the method of calculating and reporting the difference between CQI numbers. Since the differential CQI can be reported with fewer bits, the reporting overhead is reduced. The differential CQI reporting method can also be used for reporting channel state information of coordinated multipoint transmission. However, the reporting overhead of the coordinated multi-point transmission is significantly increased compared to the reporting overhead of the single-cell transmission. The CQI differential reporting is performed only by the correlation between the CQI reports in one transmission point, and only a partial CQI differential reporting of one transmission point can be realized, such as The differential reporting of the sub-band CQI, or the difference of the second codeword CQI. This method has a limited effect on saving multi-point coordinated transmission.

It can be seen that the existing differential CQI reporting method is based on the correlation between the sub-band CQI and the wideband CQI reported by the same transmission point, or based on the CQI reporting of different code words of the same transmission point. Only a part of the transmission point can be realized on the difference of CQI. For multi-point coordinated transmission, the effect of saving on the overhead is limited. SUMMARY OF THE INVENTION The embodiments of the present invention provide a CQI information reporting and determining method and apparatus for multi-point coordinated transmission, which are used to save resources required for reporting CQI information.

A channel shield indicator for multipoint coordinated transmission indicates CQI information. The method includes:

The user terminal receives reference signal configuration information of multiple channel state information processes delivered by the network side, information of a feedback mode corresponding to each channel state information process, and a differential channel shield quantity indication CQI reference information corresponding to each channel state information process Each differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes;

Determining, by the user terminal, a channel state information process that needs to be reported by the differential CQI in the process of the multiple channel state information, for each determined channel state information process, reference signal configuration information of the channel state information process and the channel The differential CQI reference information corresponding to the status information process determines the differential CQI information corresponding to the channel status information process;

The user terminal sends the channel state information to the network side according to the feedback mode corresponding to each channel state information process, and the channel state information includes the determined differential CQI information.

A method for determining CQI information for a channel shield quantity for multi-point coordinated transmission, the method comprising:

The network side delivers reference signal configuration information of multiple channel state information processes, information of feedback mode corresponding to each channel state information process, and differential CQI reference information corresponding to each channel state information process to the user terminal, and each differential CQI reference The information is information indicating a channel state information process in the plurality of channel state information processes; the network side receives channel state information reported by the user terminal, where the channel state information includes a channel state information process reported by the differential CQI Differential CQI information;

The differential CQI information corresponding to the channel state information process reported by the network side for each differential CQI is determined according to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process. The CQI information corresponding to the channel state information process is determined.

A user terminal, the user terminal comprising:

a receiving unit, configured to receive reference signal configuration information of multiple channel state information processes delivered by the network side, information of a feedback mode corresponding to each channel state information process, and a differential channel shield quantity indication corresponding to each channel state information process CQI reference information, each differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes;

a determining unit, configured to determine a channel state information process that needs to be reported by the differential CQI in the process of the multiple channel state information, for each determined channel state information process, according to the reference signal configuration information of the channel state information process and the a differential CQI reference information corresponding to the channel state information process, and determining differential CQI information corresponding to the channel state information process;

And a feedback unit, configured to send, according to a feedback mode corresponding to each channel state information process, channel state information to the network side, where the channel state information includes the determined differential CQI information.

The present invention further provides a user terminal, the user terminal includes a processor and a data transceiving interface, wherein: the processor is configured to: receive reference signal configuration information of multiple channel state information processes delivered by the network side, and each The information of the feedback mode corresponding to the channel state information process, and the differential channel shield amount corresponding to each channel state information process indicate CQI reference information, and each differential CQI reference information is a channel state information indicating the plurality of channel state information processes. Information of the process; determining a channel state information process that needs to be reported by the differential CQI in the process of the multiple channel state information, for each channel state information process determined, according to the reference signal configuration information of the channel state information process and the channel The differential CQI reference information corresponding to the status information process determines the differential CQI information corresponding to the channel state information process; and according to the feedback mode corresponding to each channel state information process, 4 channel state information is included on the network side, and the channel state information includes Determined differential CQI information ;

The data transceiver interface is used to implement data communication between the processor and the network side.

A base station, the base station comprising:

a sending unit, configured to send, to the user equipment, reference signal configuration information of multiple channel state information processes, information of a feedback mode corresponding to each channel state information process, and differential CQI reference information corresponding to each channel state information process, The differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes;

a receiving unit, configured to receive channel state information reported by the user terminal, where the channel state information includes differential CQI information corresponding to a channel state information process reported by the differential CQI;

a determining unit, configured to determine, according to the differential CQI information corresponding to the channel state information process reported by the channel state information process and the differential CQI reference information corresponding to the channel state information process, the differential CQI information corresponding to the channel state information process reported by the channel state information process CQI information corresponding to the channel state information process.

The present invention also provides a base station, where the base station includes a processor and a data transceiving interface, where: The processor is configured to: deliver, to the user equipment, reference signal configuration information of multiple channel state information processes, information of a feedback mode corresponding to each channel state information process, and a difference corresponding to each channel state information process

CQI reference information, each differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes; receiving channel state information reported by the user terminal, where the channel state information includes the differential CQI report The differential CQI information corresponding to the channel state information process; the differential CQI information corresponding to the channel state information process reported by each of the differential CQIs, and the differential CQI information corresponding to the channel state information process and the differential CQI corresponding to the channel state information process Determining CQI information corresponding to the channel state information process by using reference information;

The data transceiver interface is used to implement data communication between the processor and the user terminal.

In the solution provided by the embodiment of the present invention, the network side configures multiple channel state information processes to the user terminal, and configures differential CQI reference information for each channel state information process, and the user terminal only participates in the differential CQI reference information corresponding to the channel state information process. Determining the differential CQI information corresponding to the channel state information process, and carrying the differential CQI information in the channel state information and reporting to the network side, and the network side according to the differential CQI information corresponding to the channel state information process and the differential CQI corresponding to the channel state information process The reference information determines the CQI information corresponding to the channel state information process. Since the number of bits occupied by the difference CQI information is smaller than the number of bits occupied by the non-differential CQI information, the resource overhead required for reporting the differential CQI information is small, thereby saving system resources. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic flowchart of a method according to an embodiment of the present invention;

2 is a schematic flowchart of another method according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a device according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another device according to an embodiment of the present invention. DETAILED DESCRIPTION In multi-point coordinated transmission, there is also a correlation in CQI reporting of multiple channel state information processes. For example, in Table 1, CQI1, CQI2, CQI3, and CQI4 have the same transmission signal hypothesis, where CQI3 includes the interference of TP2 and TP3, CQI1 contains the interference of TP2 and does not include the interference of TP3; CQI2 does not contain the interference of TP2. TP3's interference; CQI4 does not contain TP2 and TP3 interference. Without loss of generality, it can be assumed that the interference power of TP2 is stronger than the interference power of TP3 for the user terminal. However, the difference between the GPRS power of TP2 and TP3 is limited by the transmission point selection threshold in the measurement set. At the same time, since TP3 is the weakest signal in the measurement set, the interference of TP3 accounts for a small proportion of the total interference. Therefore, the correlation between CQI3 and CQI1, between CQI1 and CQI2, and between CQI2 and CQI4 is high. The invention proposes a method for determining channel state information for multi-point coordinated transmission and a method for determining CQI information according to the correlation of CQI reporting of multiple channel state information processes in coordinated multipoint transmission. Referring to FIG. 1, a method for reporting CQI information for multi-point coordinated transmission on a terminal side according to an embodiment of the present invention includes the following steps:

Step 10: The user terminal receives reference signal configuration information of multiple channel state information processes delivered by the network side, information of a feedback mode corresponding to each channel state information process, and differential CQI reference information corresponding to each channel state information process. Each differential CQI reference information is information indicating a channel state information process as a differential CQI reference in the plurality of channel state information processes;

Here, each channel state information process is a process corresponding to a channel state information reference signal resource and a interference signal hypothesis of one transmission point, and correspondingly, reference signal configuration information of each channel state information process includes a corresponding transmission point direction. The user terminal sends the downlink reference signal (such as NZP CSI-RS) for channel measurement, that is, the resource information used by the downlink channel measurement reference signal, and the corresponding transmission point sends the downlink reference signal used for the interference measurement to the user terminal, that is, the interference The resource information used to measure the downlink reference signal. The user terminal may perform channel measurement and calculation on the resource indicated by the resource information used by the downlink channel measurement reference signal to obtain downlink signal power, and the user terminal may perform 1000 on the resource indicated by the resource information used by the interference measurement downlink reference signal. The disturbance measurement and calculation obtain the interference power, and then calculate the CQI sequence corresponding to the channel state information process according to the following formula of the background technology part:

, J

Step 11: The user terminal determines a channel state information process that needs to be reported by the differential CQI in the process of the multiple channel state information, and for each determined channel state information process, according to the reference signal configuration information of the channel state information process and the channel state The differential CQI reference information corresponding to the information process determines the differential CQI information corresponding to the channel state information process, where the differential CQI information is a CQI corresponding to the channel state information process, and is associated with the differential CQI reference information corresponding to the channel state information process. The offset of the CQI corresponding to the channel state information process;

Step 12: The user terminal sends 4 channel state information to the network side according to a feedback mode corresponding to each channel state information process, where the channel state information includes the determined differential CQI information.

Specifically, in step 11, the user terminal determines a channel state information process that needs to be reported by the differential CQI in the process of multiple channel state information, and the specific implementation may be as follows: each channel state information of the user terminal for multiple channel state information processes The process a, determining whether the channel state information process a, the channel state information process b indicated by the relative CQI reference information corresponding to the channel state information process is the same process, and if yes, determining that the channel state information process a does not need to be It is reported by the differential CQI. Otherwise, it is determined that the channel state information process a needs to use differential CQI reporting.

Specifically, the differential CQI information corresponding to the channel state information process is determined according to the reference signal configuration information of the channel state information process and the differential CQI reference information corresponding to the channel state information process, and the specific implementation may be as follows: setting the channel state information The number of the process is i, and the channel state information process indicated by the differential CQI reference information corresponding to the channel state information process i is numbered j;

Determining a CQI corresponding to the channel state information process i according to the reference signal configuration information of the channel state information process i Sequence number, determining a CQI sequence number corresponding to the channel state information process j according to the reference signal configuration information of the channel state information process j;

The differential CQI information corresponding to the channel state information process i is determined according to the CQI sequence number corresponding to the channel state information process i and the CQI sequence number corresponding to the channel state information process j.

Specifically, the differential CQI information corresponding to the channel state information process i is determined according to the CQI sequence number corresponding to the channel state information process i and the CQI sequence number corresponding to the channel state information process j, and the specific implementation may be as follows:

If the RI of the channel state information process i is the same as the RI of the channel state information process j, the wideband differential CQI information of the channel state information process i is determined according to the following formula 1:

Equation 1: Wideband differential CQI information of the codeword c of the channel state information process i = wideband CQI number of the codeword c of the channel state information process j - the wideband CQI number of the codeword c of the channel state information process i, where _C e { 0,l} ; or,

If the RI of the channel state information process i is different from the RI of the channel state information process j, the wideband differential CQI information of the channel state information process i is determined according to the following formula 2:

Equation 2: Wideband differential CQI information of the codeword c of the channel state information process i = wideband CQI number of the codeword 0 of the channel state information process j - the wideband CQI sequence of the codeword c of the channel state information process i, where ce {0 , 1}.

Further, when the RI of the channel state information process i is the same as the RI of the channel state information process j, if it is determined according to the feedback mode corresponding to the channel state information process i, the subband CQI information of the channel state information process i needs to be reported, as follows Equation 3 determines the subband differential CQI information for channel state information process i:

Equation 3: Subband differential CQI information of codeword c of channel state information i = wideband CQI sequence of codeword c of channel state information process j - subband CQI sequence of codeword c of channel state information process i, where ce { 0, 1}.

Further, when the RI of the channel state information process i is different from the RI of the channel state information process j, if it is determined according to the feedback mode corresponding to the channel state information process i, the subband CQI information of the channel state information process i needs to be reported, The subband differential CQI information of the channel state information process i is determined by the following formula 4:

Equation 4: Subband differential CQI information of codeword c of channel state information i = wideband CQI sequence of codeword 0 of channel state information process j - subband CQI sequence of codeword c of channel state information process i, where ce { 0, 1}.

In the step 11, the channel state information process reported by the channel state information process is not required in the process of the channel state information process, and the user terminal calculates the channel state information process according to the feedback mode corresponding to the channel state information process according to the prior art. CQI information. Correspondingly, the channel state information reported by the user terminal to the network side in the step 12 includes CQI information corresponding to each channel state information process in the process of the plurality of channel state information processes, where the channel state information reported by the differential CQI is required to be used. The process, the reported channel state information includes the differential CQI information corresponding to the corresponding channel state information process determined in step 11. For the channel state information process that does not need to be reported by the differential CQI, the reported channel state information includes the prior art according to the prior art. Calculating the CQI information corresponding to the corresponding channel state information process. Of course, the reported channel state information may also include information such as PMI and RI.

In the method, each differential CQI reference information is a channel state information process in a plurality of channel state information processes. Index, or an index of the feedback mode corresponding to a channel state information process.

Referring to FIG. 2, a method for determining CQI information for coordinated multi-point transmission on a network side according to an embodiment of the present invention includes the following steps:

Step 20: The network side sends the reference signal configuration information of the multiple channel state information processes, the feedback mode information corresponding to each channel state information process, and the differential CQI reference information corresponding to each channel state information process to the user terminal. The differential CQI reference information is information indicating a channel state information process as a differential CQI reference in the plurality of channel state information processes;

Here, the channel state information process j associated with the differential CQI reference information corresponding to the channel state information process i sent by the network side is not the same process as the channel state information process i that needs to be reported by the differential CQI. For the channel state information process i that does not need to use the differential CQI report, the channel state information process j associated with the differential CQI reference information corresponding to the channel state information process i delivered by the network side is the same process as the channel state information process i .

Step 21: The network side receives the channel state information reported by the user terminal, where the channel state information includes the differential CQI information corresponding to the channel state information process reported by the differential CQI in the process of the multiple channel state information. CQI information corresponding to the channel state information process reported by the differential CQI;

Step 22: The network side determines, according to the differential CQI information corresponding to the channel state information process reported by the channel state information process, and the differential CQI reference information corresponding to the channel state information process. CQI information corresponding to the channel state information process.

Specifically, in step 22, the network side determines the CQI information corresponding to the channel state information process according to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process, and the specific implementation may be as follows:

Setting the channel state information process number is i, and the channel state information process indicated by the differential CQI reference information corresponding to the channel state information process i is numbered j;

Determining the CQI corresponding to the channel state information process i according to the difference CQI information corresponding to the channel state information process i and the CQI sequence corresponding to the channel state information process j indicated by the differential CQI reference information corresponding to the channel state information process i information.

Specifically, the channel state information process i is determined according to the difference CQI information corresponding to the channel state information process i and the CQI sequence corresponding to the channel state information process j indicated by the differential CQI reference information corresponding to the channel state information process i. The corresponding CQI information can be implemented as follows:

If the rank indication RI of the channel state information process i is the same as the RI of the channel state information process j, the broadband CQI sequence number of the channel state information process i is determined according to the following formula 5:

Equation 5: Wideband CQI number of codeword c of channel state information process i = wideband CQI number of codeword c of channel state information process j - wideband difference CQI of codeword c of channel state information process i, where _C e {0 ,l} ; or, If the RI of the channel state information process i is different from the RI of the channel state information process j, the broadband CQI sequence number of the channel state information process i is determined according to the following formula 6:

Equation 6: Wideband CQI number of codeword c of channel state information process i = wideband CQI number of codeword 0 of channel state information process j - wideband difference CQI of codeword c of channel state information process i, where _ce {0, 1}.

Further, when the RI of the channel state information process i is the same as the RI of the channel state information process j, if the reported channel state information includes the subband differential CQI information of the channel state information process i, the channel state is determined according to the following formula 7. Subband CQI sequence number of information process i:

Equation 7: Subband CQI sequence number of codeword c of channel state information process i = wideband CQI sequence number of codeword c of channel state information process j - subband difference CQI of codeword c of channel state information process i, where _ce { 0,1}.

Further, when the RI of the channel state information process i is different from the RI of the channel state information process j, if the reported channel state information includes the subband differential CQI information of the channel state information process i, the channel is determined according to the following formula Sub-band CQI sequence number of status information process i:

Equation 8: Subband CQI sequence number of codeword c of channel state information process i = wideband CQI sequence number of codeword 0 of channel state information process j - subband difference CQI of codeword c of channel state information process i, where _ce { 0,1}.

In step 22, the network side determines, according to the prior art, the CQI information corresponding to the channel state information process reported by the received channel state information that is not used by the differential CQI, according to the feedback mode corresponding to the channel state information process. CQI information corresponding to the status information process.

In the method, each differential CQI reference information is an index of a channel state information process in a plurality of channel state information processes, or an index of a feedback mode corresponding to a channel state information process.

The executor of the method may be any network side device such as a transmission point of a base station or a terminal.

Example:

Assuming that there are three transmission points TP1, ΤΡ2, and ΤΡ3 in the measurement set of a user terminal, three channel state information processes need to be configured to the user terminal;

Step 1: The network sends the reference signal configuration information of each channel state information process, the feedback mode information corresponding to each channel state information process, and the differential CQI reference information corresponding to each channel state information process to the user terminal;

The specific information delivered is shown in Table 2:

Table 2

Channel transmission signal hypothesis interference hypothesis

Channel difference

State

State CQI

Information TP TP TP Information Test TP1 TP2 TP3

Process 1 2 3 Process if

Index Channel channel

State of state

Signa

Information 1 Information Off On On

1

Process process

1 index 1

channel

State

State signa

2 Information Off Off On Information 1 - - Process

2

Index 1

channel

State

State signa

3 Information Off Off Off Information 1 - - Process

3

Index 2

Step 2: After receiving the information sent by the network side, the user terminal performs channel channel and interference measurement and calculation according to the reference signal configuration information of each channel state information process, and obtains the CQI sequence number corresponding to the channel state information process; The channel state information process reported by the differential CQI, for each channel state information process determined, according to the CQI sequence number corresponding to the channel state information process, and the channel state information process indicated by the differential CQI reference information corresponding to the channel state information process Corresponding CQI sequence number, determining differential CQI information corresponding to the channel state information process; the details are as follows:

The rank of the channel state information process 1 of the user terminal is 1, and the rank of the channel state information process 2 depends on the rank of the channel state information process 1, so the rank of the channel state information process 2 is also 1. The rank of the channel state information process 3 is 2;

The user terminal checks the differential CQI reference information of the channel state information process 1 as the channel state information process index 1, which is the same as the channel state information process index 1 of the current channel state information process 1, and does not need to calculate the channel state information process according to the method of the present invention. 1 differential CQI information.

The user terminal checks the differential CQI reference information of the channel state information process 2, which is the channel state information process index 1, which is different from the channel state information process index 2 of the current channel state information process 3. The channel state information process 2 and the channel state information process 1 have the same rank, and the user terminal calculates the differential CQI of the codeword 0 of the channel state information process 2 according to the wideband CQI sequence number of the codeword 0 of the channel state information process 1, respectively. The message is below:

Wideband differential CQI information of codeword 0 of channel state information process 2 = wideband CQI number of codeword 0 of channel state information 1 - wideband CQI number of codeword 0 of channel state information 2 If it is determined according to the feedback mode corresponding to the channel state information process 2 that the sub-band CQI information of the channel state information process 2 needs to be reported, the sub-band differential CQI information of the channel state information process 2 is calculated as follows:

Subband difference of codeword 0 of channel state information process 2 CQI information = channel state information process 1 codeword 0 wideband CQI sequence number - channel state information process 2 codeword 0 subband CQI sequence number;

The differential CQI reference information of the user terminal check channel state information process 3 is the channel state information process index 2, which is different from the channel state information process index 3 of the current channel state information process 3. The rank of the channel state information process 3 is 2. Unlike the channel state information process 2, the user terminal is in the wideband CQI number of the codeword 0 of the channel state information process 2, and the wideband differential CQI information of the channel state information process 3 is calculated as follows:

Wideband difference of codeword 0 of channel state information process 3 CQI information = channel state information process 2 codeword 0 wideband CQI sequence number - channel state information process 3 codeword 0 wideband CQI sequence number;

Wideband difference of codeword 1 of channel state information process 3 CQI information = channel state information process 2 codeword 0 wideband CQI sequence number - channel state information process 3 codeword 1 wideband CQI sequence number;

If it is determined according to the feedback mode corresponding to the channel state information process 3 that the sub-band CQI information of the channel state information process 3 needs to be reported, the sub-band differential CQI information of the channel state information process 3 is calculated as follows:

Channel state information process 3 codeword 0 subband difference CQI information = channel state information process 2 codeword 0 broadband

CQI sequence number - the sub-band CQI sequence number of the codeword 0 of the channel state information process 3;

Subband difference of codeword 1 of channel state information process 3 CQI = channel state information process 2 codeword 0 wideband CQI sequence number - channel state information process 3 codeword 1 subband CQI sequence number;

Step 3: Report channel state information to the network side according to a feedback mode corresponding to each channel state information process, where the channel state information includes the determined differential CQI information, specifically including CQI information and channel state information corresponding to channel state information process 1 The differential CQI information corresponding to the process 2 and the differential CQI information corresponding to the channel state information process 31 are implemented as follows:

The user terminal uses the differential CQI information corresponding to the channel state information process 2 to replace the CQI sequence number in the channel state information process 2, and reports it according to the reporting mode of the network configuration. The user terminal uses the differential CQI information of the channel state information process 3 to replace the CQI sequence number in the channel state information of the channel state information process 3, and reports it according to the reporting mode of the network configuration.

Step 4: The network side receives the channel state information reported by the user terminal, where the channel state information includes the differential CQI information corresponding to the channel state information process reported by the differential CQI; corresponding to the channel state information process reported by each differential CQI The differential CQI information is determined according to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process, and the CQI information corresponding to the channel state information process is determined as follows: The reported channel state information includes a CQI sequence corresponding to the channel state information process 1, a differential CQI information corresponding to the channel state information process 2, and differential CQI information corresponding to the channel state information process 3, and calculates a channel state information process according to the differential CQI reference information. 2 CQI information corresponding to channel state information process 3. The network side first calculates the bandwidth of the codeword 0 of the channel state information process 2 according to the wideband CQI sequence number of the codeword 0 of the channel state information process 1:

Wideband CQI number of codeword 0 of channel state information process 2 = wideband CQI number of codeword 0 of channel state information process 1 - wideband difference CQI information of codeword 0 of channel state information process 2;

If the reported channel state information includes the subband differential CQI information of the channel state information process 2, the subband CQI information of the channel state information process 2 is determined as follows:

Sub-band of codeword 0 of channel state information process 2 CQI sequence number = channel state information process 1 codeword 0 wideband CQI sequence number - channel state information process 2 codeword 0 subband difference CQI information;

The network side calculates the wideband CQI or subband CQI information of the channel state information process 3 according to the calculated wideband CQI sequence number of the codeword 0 of the channel state information process 2:

The channel state information process 3 codeword 0 wideband CQI sequence number = channel state information process 2 codeword 0 wideband CQI sequence number - channel state information process 3 codeword 0 wideband difference CQI information;

Broadband CQI sequence number of codeword 1 of channel state information process 3 = wideband CQI number of codeword 0 of channel state information process 2 - wideband difference CQI information of codeword 1 of channel state information process 3;

If the reported channel state information includes the subband differential CQI information of the channel state information process 3, the subband CQI information of the channel state information process 3 is determined as follows:

Sub-band of codeword 0 of channel state information process 3 CQI sequence number = channel state information process 2 codeword 0 wideband CQI sequence number - channel state information process 3 codeword 0 subband difference CQI information;

Sub-band of codeword 1 of channel state information process 3 CQI sequence = channel state information process 2 codeword 0 wideband CQI sequence-channel state information process 3 codeword 1 subband difference CQI information.

Referring to FIG. 3, an embodiment of the present invention provides a user terminal, where the user terminal includes:

The receiving unit 30 is configured to receive reference signal configuration information of multiple channel state information processes delivered by the network side, information of a feedback mode corresponding to each channel state information process, and a differential channel shield corresponding to each channel state information process. Instructing CQI reference information, each differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes;

a determining unit 31, configured to determine a channel state information process that needs to be reported by the differential CQI in the process of the multiple channel state information, for each determined channel state information process, according to the reference signal configuration information of the channel state information process and Determining differential CQI information corresponding to the channel state information process by using the differential CQI reference information corresponding to the channel state information process;

The feedback unit 32 is configured to send, to the network side, channel state information according to a feedback mode corresponding to each channel state information process, where the channel state information includes the determined differential CQI information.

Further, the determining unit 31 is configured to: determine, according to the following method, a channel state information process that needs to be reported by the differential CQI in the multiple channel state information processes: Determining, for each of the plurality of channel state information processes, the channel state information process a, the channel state information process b indicated by the relative CQI reference information corresponding to the channel state information process, The same process, if yes, determines that the channel state information process a does not need to use differential CQI reporting, otherwise, it is determined that the channel state information process a needs to use differential CQI reporting.

Further, the determining unit 31 is configured to: determine, according to the following method, a difference corresponding to the channel state information process

CQI information:

The number of the channel state information process is i, and the number of the channel state information process indicated by the differential CQI reference information corresponding to the channel state information process i is j;

Determining, according to the reference signal configuration information of the channel state information process i, a CQI sequence number corresponding to the channel state information process i, and determining a CQI sequence number corresponding to the channel state information process j according to the reference signal configuration information of the channel state information process j;

Further, the determining unit 31 is configured to: determine differential CQI information corresponding to the channel state information process i according to the following method:

If the rank indication RI of the channel state information process i is the same as the RI of the channel state information process j, the wideband differential CQI information of the channel state information process i is determined according to the following formula 1:

Further, the determining unit 31 is further configured to:

When the RI of the channel state information process i is the same as the RI of the channel state information process j, if it is determined according to the feedback mode corresponding to the channel state information process i, the subband CQI information of the channel state information process i needs to be reported, then the following formula 3 is determined. Subband differential CQI information for channel state information process i:

Further, the determining unit 31 is further configured to:

If the RI of the channel state information process i is different from the RI of the channel state information process j, if the subband CQI information of the channel state information process i needs to be reported according to the feedback mode corresponding to the channel state information process i, then the following formula 4 is used. Determine the subband differential CQI information of channel state information process i: Equation 4: Subband differential CQI information of codeword c of channel state information i = wideband CQI sequence of codeword 0 of channel state information process j - subband CQI sequence of codeword c of channel state information process i, where ce { 0,1}.

Further, each differential CQI reference information is an index of a channel state information process in the plurality of channel state information processes, or an index of a feedback mode corresponding to a channel state information process.

Referring to FIG. 4, an embodiment of the present invention provides a base station, where the base station includes:

The sending unit 40 is configured to send, to the user equipment, reference signal configuration information of multiple channel state information processes, information of a feedback mode corresponding to each channel state information process, and differential CQI reference information corresponding to each channel state information process, Each differential CQI reference information is information indicating a channel state information process of the plurality of channel state information processes;

The receiving unit 41 is configured to receive channel state information reported by the user terminal, where the channel state information includes differential CQI information corresponding to the channel state information process reported by the difference CQI;

The determining unit 42 is configured to determine, according to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process, the differential CQI information corresponding to the channel state information process reported by each channel differential information process. The CQI information corresponding to the channel state information process.

Further, the determining unit 42 is configured to: determine CQI information corresponding to the channel state information process according to the following method:

Further, the determining unit 42 is configured to: determine CQI information corresponding to the channel state information process i according to the following method: If the rank indication RI of the channel state information process i is the same as the RI of the channel state information process j, the broadband CQI sequence number of the channel state information process i is determined according to the following formula 5:

Equation 5: Wideband CQI number of codeword c of channel state information process i = wideband CQI number of codeword c of channel state information process j - wideband difference CQI of codeword c of channel state information process i, where _C e {0 ,l} ; or,

If the RI of the channel state information process i is different from the RI of the channel state information process j, the wideband CQI sequence number of the channel state information process i is determined according to the following formula 6:

Further, the determining unit 42 is further configured to:

When the RI of the channel state information process i is the same as the RI of the channel state information process j, if the reported channel state information includes the subband differential CQI information of the channel state information process i, the channel state information process i is determined according to the following formula Subband CQI sequence number:

Further, the determining unit 42 is further configured to:

When the RI of the channel state information process i is different from the RI of the channel state information process j, if the reported channel state information includes the subband differential CQI information of the channel state information process i, the channel state information process is determined according to the following formula 8. Sub-band CQI number of i:

Equation 8: Subband CQI sequence number of codeword c of channel state information process i = wideband CQI sequence number of codeword 0 of channel state information process j - subband difference CQI of codeword c of channel state information process i, where _C e {0,l}.

The present invention also provides a base station, where the base station includes a processor and a data transceiving interface, where:

The processor is configured to: deliver reference signal configuration information of multiple channel state information processes to the user terminal, information of a feedback mode corresponding to each channel state information process, and a differential CQI reference corresponding to each channel state information process Information, each differential CQI reference information is information indicating a channel state information process in the plurality of channel state information processes; receiving channel state information reported by the user terminal, where the channel state information includes a channel state reported by the differential CQI The differential CQI information corresponding to the information process; the differential CQI information corresponding to the channel state information process reported by each of the differential CQIs, and the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process Determining CQI information corresponding to the channel state information process;

In summary, the beneficial effects of the present invention include:

In the solution provided by the embodiment of the present invention, when the multi-point cooperative transmission is performed, the network side configures multiple channel state letters to the user terminal. Interval process, and each channel state information process is configured with differential CQI reference information, and the user terminal determines the differential CQI information corresponding to the channel state information process by using the differential CQI reference information corresponding to the channel state information process, and carries the differential CQI information in In the channel state information, the network side, the network side only the difference CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process, and the CQI information corresponding to the channel state information process is determined. Since the number of bits occupied by the differential CQI information is smaller than the number of bits occupied by the non-differential CQI information, the resource overhead required for reporting the differential CQI information is small, thereby saving system resources.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those of ordinary skill in the art that <RTIgt; Therefore, the appended claims are intended to be construed as including the preferred embodiments and the modifications

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

1. A channel shield indication CQI information reporting method for multi-point coordinated transmission, characterized in that the method includes:

The user terminal receives the reference signal configuration information of multiple channel state information processes delivered by the network side, the feedback mode information corresponding to each channel state information process, and the differential CQI reference information corresponding to each channel state information process. Each differential CQI The reference information is information indicating one channel state information process among the plurality of channel state information processes;

The user terminal determines the channel state information process that needs to use differential CQI reporting among the multiple channel state information processes. For each determined channel state information process, # ^according to the reference signal configuration information of the channel state information process and the channel The differential CQI reference information corresponding to the status information process determines the differential CQI information corresponding to the channel status information process;

The user terminal transmits channel state information to the network side according to the feedback mode corresponding to each channel state information process, and the channel state information includes determined differential CQI information.

2. The method according to claim 1, characterized in that the user terminal determines the plurality of channel state information processes that need to use a differential CQI reporting channel state information process, specifically including:

For each channel state information process a in the plurality of channel state information processes, the user terminal determines the channel state information process a, the channel state information process b indicated by the relative CQI reference information corresponding to the channel state information process, Whether it is the same process, if so, it is determined that the channel state information process a does not need to use differential CQI reporting; otherwise, it is determined that the channel state information process a needs to use differential CQI reporting.

3. The method of claim 1, wherein: determining the differential CQI reference information corresponding to the channel state information process based on the reference signal configuration information of the channel state information process and the differential CQI reference information corresponding to the channel state information process. CQI information, specifically including:

Determine the CQI sequence number corresponding to the channel state information process i according to the reference signal configuration information of the channel state information process i, and determine the CQI sequence number corresponding to the channel state information process j according to the reference signal configuration information of the channel state information process j;

According to the CQI sequence number corresponding to the channel state information process i and the CQI sequence number corresponding to the channel state information process j, the differential CQI information corresponding to the channel state information process i is determined.

4. The method of claim 3, wherein: determining the differential CQI corresponding to the channel state information process i based on the CQI sequence number corresponding to the channel state information process i and the CQI sequence number corresponding to the channel state information process j Information, specifically including: If the rank indicator RI of channel state information process i is the same as the RI of channel state information process j, then the wideband differential CQI information of channel state information process i is determined according to the following formula 1:

Formula 1: The wideband differential CQI information of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword c of the channel state information process j - the wideband CQI sequence number of the codeword c of the channel state information process i, where _C e { 0,l} ; or,

If the RI of channel state information process i is different from the RI of channel state information process j, then the wideband differential CQI information of channel state information process i is determined according to the following formula 2:

Formula 2: The wideband differential CQI information of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword 0 of the channel state information process j - the wideband CQI sequence number of the codeword c of the channel state information process i, where c e {0 , 1}.

5. The method of claim 4, wherein when the RI of the channel state information process i is the same as the RI of the channel state information process j, if it is determined that the channel state needs to be reported according to the feedback mode corresponding to the channel state information process i The sub-band CQI information of the information process i is determined according to the following formula 3. The sub-band differential CQI information of the channel state information process i: Formula 3: The sub-band differential CQI information of the codeword c of the channel state information i = channel state information process j The wideband CQI sequence number of codeword c - the subband CQI sequence number of codeword c of channel state information process i, where c e {0, 1}.

6. The method of claim 4, wherein when the RI of the channel state information process i is different from the RI of the channel state information process j, if it is determined that the channel needs to be reported according to the feedback mode corresponding to the channel state information process i The sub-band CQI information of the state information process i is determined according to the following formula 4: The sub-band differential CQI information of the channel state information process i: Formula 4: The sub-band differential CQI information of the codeword c of the channel state information i = channel state information process The wideband CQI sequence number of codeword 0 of j - the subband CQI sequence number of codeword c of channel state information process i, where c e {0, 1}.

7. The method according to any one of claims 1 to 6, characterized in that each differential CQI reference information is an index of a channel state information process among the plurality of channel state information processes, or a channel state information process. The index of the corresponding feedback mode.

8. A method for determining channel shield indication CQI information for coordinated multi-point transmission, characterized in that the method includes:

The network side delivers to the user terminal the reference signal configuration information of multiple channel state information processes, the feedback mode information corresponding to each channel state information process, and the differential CQI reference information corresponding to each channel state information process. Each differential CQI reference The information is information indicating one of the channel state information processes among the plurality of channel state information processes; the network side receives the channel state information reported by the user terminal, and the channel state information includes the channel state information process corresponding to the channel state information process reported using the differential CQI. Differential CQI information;

For the differential CQI information corresponding to each channel state information process reported using differential CQI, the network side determines the channel state information based on the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process. CQI information corresponding to the process.

9. The method of claim 8, wherein: determining the channel state information process corresponding to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process. CQI information, specifically including:

Determine the CQI corresponding to the channel state information process i according to the differential CQI information corresponding to the channel state information process i and the CQI sequence number corresponding to the channel state information process j indicated by the differential CQI reference information corresponding to the channel state information process i. information.

10. The method according to claim 9, characterized in that, the channel state information process indicated by the differential CQI information corresponding to the channel state information process i and the differential CQI reference information corresponding to the channel state information process i The CQI sequence number corresponding to j determines the CQI information corresponding to the channel state information process i, specifically including:

If the rank indication RI of channel state information process i is the same as the RI of channel state information process j, then the broadband CQI sequence number of channel state information process i is determined according to the following formula 5:

Formula 5: The wideband CQI sequence number of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword c of the channel state information process j - the wideband differential CQI of the codeword c of the channel state information process i, where _C e {0 ,l} ; or,

If the RI of channel state information process i is different from the RI of channel state information process j, then the broadband CQI sequence number of channel state information process i is determined according to the following formula 6:

Formula 6: The wideband CQI sequence number of codeword c of channel state information process i = the wideband CQI sequence number of codeword 0 of channel state information process j - the wideband differential CQI of codeword c of channel state information process i, where _ce {0, 1}.

11. The method of claim 10, wherein when the RI of channel state information process i is the same as the RI of channel state information process j, if the reported channel state information contains the subband of channel state information process i, For differential CQI information, the subband CQI sequence number of channel state information process i is determined according to the following formula 7:

Formula 7: The subband CQI sequence number of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword c of the channel state information process j - the subband differential CQI of the codeword c of the channel state information process i, where _ce { 0,1}.

12. The method of claim 10, wherein when the RI of the channel state information process i is different from the RI of the channel state information process j, if the reported channel state information contains a child of the channel state information process i, With differential CQI information, the sub-band CQI sequence number of channel state information process i is determined according to the following formula 8:

Formula 8: The subband CQI sequence number of codeword c of channel state information process i = the wideband CQI sequence number of codeword 0 of channel state information process j - the subband differential CQI of codeword c of channel state information process i, where {0 ,1}.

13. The method according to any one of claims 8 to 12, characterized in that each differential CQI reference information is an index of a channel state information process among the plurality of channel state information processes, or a channel state information process. The index of the corresponding feedback mode.

14. A user terminal, characterized in that the user terminal includes:

The receiving unit is configured to receive the reference signal configuration information of multiple channel status information processes issued by the network side, the feedback mode information corresponding to each channel status information process, and the differential channel shield corresponding to each channel status information process. The quantity indicates CQI reference information, and each differential CQI reference information is information indicating one channel state information process among the plurality of channel state information processes;

The determining unit is used to determine the channel state information process that needs to use differential CQI reporting among the plurality of channel state information processes. For each determined channel state information process, according to the reference signal configuration information of the channel state information process and the The differential CQI reference information corresponding to the channel state information process determines the differential CQI information corresponding to the channel state information process;

The feedback unit is configured to provide channel state information to the network side according to the feedback mode corresponding to each channel state information process, and the channel state information includes the determined differential CQI information.

15. The user terminal according to claim 14, wherein the determining unit is configured to: determine the channel state information process that needs to use differential CQI reporting among the multiple channel state information processes according to the following method:

For each channel state information process a in the plurality of channel state information processes, determine whether the channel state information process a and the channel state information process b indicated by the relative CQI reference information corresponding to the channel state information process are For the same process, if so, it is determined that the channel state information process a does not need to use differential CQI reporting; otherwise, it is determined that the channel state information process a needs to use differential CQI reporting.

16. The user terminal according to claim 14, wherein the determining unit is configured to: determine the differential CQI information corresponding to the channel state information process according to the following method:

17. The user terminal according to claim 16, wherein the determining unit is configured to: determine the differential CQI information corresponding to the channel state information process i according to the following method:

If the rank indication RI of channel state information process i is the same as the RI of channel state information process j, then the wideband differential CQI information of channel state information process i is determined according to the following formula 1:

Formula 2: The wideband differential CQI information of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword 0 of the channel state information process j - the wideband CQI sequence number of the codeword c of the channel state information process i, where ce {0 ,1}.

18. The user terminal according to claim 17, wherein the determining unit is further configured to: when the RI of the channel state information process i is the same as the RI of the channel state information process j, if the RI of the channel state information process i is the same The corresponding feedback mode determines that the sub-band CQI information of the channel state information process i needs to be reported, then the sub-band differential CQI information of the channel state information process i is determined according to the following formula 3:

Formula 3: Subband differential CQI information of codeword c of channel state information i = wideband CQI sequence number of codeword c of channel state information process j - subband CQI sequence number of codeword c of channel state information process i, where c e { 0, 1}.

19. The user terminal according to claim 17, characterized in that the determining unit is also used to:

When the RI of channel state information process i is different from the RI of channel state information process j, if it is determined based on the feedback mode corresponding to channel state information process i that the subband CQI information of channel state information process i needs to be reported, then the following formula 4 is used. Determine the subband differential CQI information of channel state information process i:

Formula 4: Subband differential CQI information of codeword c of channel state information i = wideband CQI sequence number of codeword 0 of channel state information process j - subband CQI sequence number of codeword c of channel state information process i, where c e { 0, 1}.

20. The user terminal according to any one of claims 14 to 19, characterized in that each differential CQI reference information is an index of a channel state information process among the plurality of channel state information processes, or a channel state information process. Index of the feedback mode corresponding to the process.

21. A base station, characterized in that the base station includes:

The sending unit is configured to deliver to the user terminal the reference signal configuration information of multiple channel state information processes, the feedback mode information corresponding to each channel state information process, and the differential CQI reference information corresponding to each channel state information process, each The differential CQI reference information is information indicating one channel state information process among the plurality of channel state information processes;

The receiving unit is configured to receive channel state information reported by the user terminal, where the channel state information includes differential CQI information corresponding to the channel state information process reported using differential CQI;

The determining unit is configured to determine the differential CQI information corresponding to each channel state information process using differential CQI reporting according to the differential CQI information corresponding to the channel state information process and the differential CQI reference information corresponding to the channel state information process. CQI information corresponding to the channel status information process.

22. The base station according to claim 21, wherein the determining unit is configured to: determine the CQI information corresponding to the channel state information process according to the following method:

According to the differential CQI information corresponding to the channel state information process i, and the differential CQI information corresponding to the channel state information process i

The CQI sequence number corresponding to the channel state information process j indicated by the CQI reference information determines the CQI information corresponding to the channel state information process i.

23. The base station according to claim 22, characterized in that the determining unit is configured to: determine according to the following method The CQI information corresponding to the channel status information process i:

24. The base station according to claim 23, characterized in that the determining unit is also used to:

When the RI of channel state information process i is the same as the RI of channel state information process j, if the reported channel state information contains the sub-band differential CQI information of channel state information process i, then the channel state information process i is determined according to the following formula 7 The subband CQI sequence number:

Formula 7: The subband CQI sequence number of the codeword c of the channel state information process i = the wideband CQI sequence number of the codeword c of the channel state information process j - the subband differential CQI of the codeword c of the channel state information process i, where _C e {0,l}.

25. The base station according to claim 23, characterized in that the determining unit is also used to:

When the RI of channel state information process i is different from the RI of channel state information process j, if the reported channel state information contains sub-band differential CQI information of channel state information process i, the channel state information process is determined according to the following formula 8 The subband CQI sequence number of i:

26. The base station according to any one of claims 21 to 25, characterized in that each differential CQI reference information is an index of a channel state information process among the plurality of channel state information processes, or a channel state information process. The index of the corresponding feedback mode.