WO2014047909A1

WO2014047909A1 - Aperiodic csi feedback processing method and device

Info

Publication number: WO2014047909A1
Application number: PCT/CN2012/082397
Authority: WO
Inventors: 夏亮
Original assignee: 华为技术有限公司
Priority date: 2012-09-28
Filing date: 2012-09-28
Publication date: 2014-04-03
Also published as: CN103858466A

Abstract

The present invention relates to the field of communications. Provided in an embodiment of the present invention are an aperiodic CSI feedback processing method and device, capable of solving the aperiodic CSI feedback problem in a CoMP and CA coexistence scenario; the method comprises: determining, according to a received CSI feedback triggering signaling, the total number C of the CSIs having feedback to be triggered or the total number A of the RIs in the CSIs having feedback to be triggered; and then feeding back some of the CSIs or the RIs in some of the CSIs to a base station according to the total number C of the CSIs having feedback to be triggered or the total number A of the RIs in the CSIs having feedback to be triggered, or not conducting the aperiodic CSI feedback corresponding to the CSI feedback triggering signaling.

Description

Method and device for processing CSI aperiodic feedback

The present invention relates to the field of communications, and in particular, to a channel state information (CSI) aperiodic feedback processing method and device.

Background technique

In the Long Term Evolution (LTE) Rel-10 communication system, in order to achieve higher user throughput, Coordinated Multiple Point transmission and reception (CoMP) technology and carrier aggregation can be adopted.

(Carrier Aggregation, CA) technology.

In the LTE Rel-10 protocol, the downlink CSI includes a Rank Indication (RI), a Precoding Matrix Indicator (PMI), a Precoding Type Indicator (PTI), and a Channel Quality Indicator (Channel Quality). Indicator, CQI), etc. The method for feeding back CSI includes periodic feedback and non-periodic feedback. In the non-periodic feedback mode, the user equipment (UE) triggers signaling at the physical layer uplink shared channel according to the CSI feedback trigger signal sent by the base station.

(Physical Uplink Shared Channel, PUSCH) The CSI is fed back on the corresponding time-frequency resources.

In the 3GPP LTE Rel-10 protocol, the UE's non-periodic feedback to the CSI reports up to CSI corresponding to 5 carriers at a time. The RI in each CSI is encoded by Reed-Muller (RM) coding. Joint coding, where each CSI has an RI of up to 3 bits. Currently, Rel-10 only supports encoding of RIs of up to 15 bits.

In Rel- 1 1 , when the characteristics of CoMP and CA are supported at the same time, in aperiodic feedback, the UE needs to report the CSI of the multi-carrier multi-CSI process. Assume that there are four types of CSI processes for each carrier and that the UE is configured with five carriers. In this case, the UE may need to report 20 CSIs at a time. Assume that the RI of each CSI contains 3 bits, and the UE needs to be up to one at a time. 60-bit RI. In the prior art, the UE cannot support 60 ratios. Special RI reported.

Summary of the invention

Embodiments of the present invention provide a CSI aperiodic feedback method and apparatus to solve the problem of CSI aperiodic feedback in CoMP and CA coexistence scenarios.

In order to achieve the above objectives, embodiments of the present invention adopt the following technical solutions:

In a first aspect, a method for processing channel state information CSI aperiodic feedback is provided, including:

The user equipment UE determines, according to the received CSI feedback trigger signaling, the total number C of CSIs that trigger feedback or the total number A of RI information in the CSI that triggers feedback;

The UE feeds back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback, or does not perform the signaling corresponding to the CSI feedback trigger signaling. CSI aperiodic feedback.

In a first possible implementation manner, the UE, according to the total number C of CSIs that trigger the feedback or the total number of RI information in the CSI that triggers the feedback, feeds back the RI in the partial CSI or the partial CSI to the base station, including:

When the total number C of CSIs that trigger the feedback is greater than the CSI threshold or the total number A of RI information in the CSI of the trigger feedback is greater than the RI threshold, the RI in the partial CSI or part of the CSI is fed back to the base station, so that the feedback The sum of the CSIs less than or equal to the CSI threshold or the RI of the feedback is less than or equal to the RI threshold.

In a second possible implementation manner, in combination with the first possible implementation manner of the first aspect, the method further includes: determining a priority of each CSI according to a preset rule; and feeding back a partial CSI or a partial CSI to the base station RI in , including:

The feedback of the lowest priority CSI or the lowest priority CSI in the CSI is discarded according to the priority of each CSI until the sum of the CSIs that are not abandoned is less than or equal to the CSI threshold or the RI that is not abandoned. The sum is less than or equal to the RI threshold; the RI in the non-abandoned CSI or CSI is fed back to the base station.

In a third possible implementation manner, in combination with the first possible implementation manner of the first aspect, the method further includes: determining a priority of each CSI according to a preset rule; and feeding back a partial CSI or a partial CSI to the base station RI in , including: The feeding back the RI in the partial CSI or the partial CSI to the base station includes: retaining the feedback of the CSI in the highest priority or the RI in the highest priority according to the priority of each CSI until the sum of the reserved CSIs is equal to or The sum of the maximum less than the CSI threshold or the retained RI is equal to or maximally less than the RI threshold;

The RI in the reserved CSI or CSI is fed back to the base station.

In a fourth possible implementation manner, in combination with the second or third possible implementation manner of the first aspect, determining a priority of each CSI according to a preset rule, including: determining a CSI of each CSI process according to the CSI process number. Priority

Or determining a priority of a CSI of each carrier according to the carrier number;

Or, first, determining a CSI priority of each CSI process according to the CSI process number, and then determining a CSI priority of each carrier with the same CSI process number according to the carrier number; or, first, determining a CSI priority of each carrier according to the carrier number, Then, the CSI priority of each CSI process with the same carrier number is determined according to the CSI process number.

With reference to the second or the third possible implementation manner of the first aspect, in a fifth possible implementation manner, determining a priority of each CSI according to a preset rule, including: triggering signaling according to the received CSI feedback triggering The location number of the CSI in the CSI set determines the priority of the CSI.

In combination with the second, third, fourth, or fifth possible implementation manners of the first aspect, in a sixth possible implementation manner, the priority of each CSI is determined according to a preset rule, including:

The priority of the CSI fed back in the latest CSI aperiodic feedback and/or the priority of the CSI whose RI of the CSI in the last two aperiodic reports are not changed is determined as the first priority, and the priorities of other CSIs are determined. For the second priority, the first priority is lower than the second priority.

With reference to the second or third possible implementation manner of the first aspect, in a seventh possible implementation manner, determining a priority of each CSI according to a preset rule includes: determining, according to at least one of the following parameters, each CSI Priority: channel quality indication, channel capacity, UE processing capability, and feedback to the base station the identification information of the CSI that has not been abandoned or reserved. And/or feedback to the base station identification information of the CSI that is abandoned or not reserved.

In an eighth possible implementation manner, in combination with the first to seventh possible implementation manners of the first aspect, the returning the RI in the partial CSI or the partial CSI to the base station includes: in the CSI that is not to be abandoned or reserved The RI code with the total number of bits B is reported to the base station, and the total number of bits B is less than or equal to the total number A of RI information in the CSI of the trigger feedback.

The RI code of the total number of bits in the CSI that has not been abandoned or reserved is reported to the base station, and includes:

The Reed-Muller RM code with a length of 32 base sequences is used to encode and report the RI with a total number of bits of B bits, where N is the smallest integer not less than (B + 1 1 ); or, using a tail bite The convolutional code encodes and reports the RI with a total number of bits of B bits; or, when the total number of bits B is less than or equal to 22, the Reed-Muller coded pair with a base sequence length of 32 is B bits. The RI is encoded, where N is the smallest integer not less than (B + 1 1 ); when the total number of bits B is greater than 22, the tailed convolutional code is used to encode the RI with a total number of bits of B bits;

The bite-tailing convolutional code is used to encode and report the RI with a total number of bits of B bits, including:

The number of bits obtained by biting the convolutional coding of the RI is calculated according to the following formula:

(B+CRC check bit number) ÷ PUSCH coding rate X, wherein the high layer signaling by the base station is notified to the UE;

The RI of the total number of bits of B bits is encoded and reported using the tail biting convolutional code based on the total number of bits B and the number of encoded bits obtained by the calculation.

In a ninth possible implementation manner, the UE, according to the total number C of CSIs that trigger the feedback or the total number of RI information in the CSI that triggers the feedback, feeds back the RI in the partial CSI or the partial CSI to the base station, including:

Determining, by the UE, feedback of abandoning part of CSI or RI of part of CSI according to at least one of the following parameters: channel quality indication, channel capacity, UE processing capability;

The base station is fed back the RI in the non-abandoned CSI or part of the CSI, and the identification information of the CSI that is not discarded and/or the identification information of the discarded CSI. In a ninth possible implementation manner, the UE does not perform CSI aperiodic feedback corresponding to the CSI feedback trigger signaling according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers feedback. , including:

When the total number C of CSIs that trigger the feedback exceeds the CSI limit value or the total number of RI information in the CSI of the trigger feedback exceeds the RI limit value, CSI aperiodic feedback corresponding to the CSI feedback trigger signaling is not performed.

In a second aspect, a user equipment UE is provided, including:

a determining unit, configured to determine, according to the received CSI feedback trigger signaling, a total number C of CSIs that trigger feedback or a total number A of RI information in the CSI that triggers feedback;

a feedback processing unit, configured to feed back, according to the total number C of CSIs of the trigger feedback determined by the determining unit or the total number A of RI information in the CSI that triggers feedback, to the RI of the partial CSI or part of the CSI, or not corresponding to the CSI aperiodic feedback of CSI feedback trigger signaling.

In a first possible implementation, the feedback processing unit is specifically configured to: when the total number C of CSIs of the trigger feedback is greater than a CSI threshold or the total number of RI information in the CSI of the trigger feedback is greater than an RI threshold In the case of a value, the RI in the partial CSI or the partial CSI is fed back to the base station such that the sum of the fed back CSIs is less than or equal to the sum of the CSI threshold or the fed back RI is less than or equal to the RI threshold.

In a second possible implementation manner, in combination with the first possible implementation manner of the second aspect, the feedback processing unit includes: a determining subunit, a processing subunit, and a feedback subunit;

Determining a sub-unit, configured to determine a priority of each CSI according to a preset rule, where the processing sub-unit is configured to discard a CSI or a priority with a lowest priority according to a priority of each CSI determined by the determining sub-unit The feedback of the RI in the lowest CSI until the sum of the CSIs that are not abandoned is less than or equal to the sum of the CSI threshold or the RI that is not abandoned is less than or equal to the RI threshold;

The feedback subunit is configured to feed back, to the base station, the RI in the CSI or CSI that the processing subunit is not abandoned.

In a third possible implementation, combining the first possible implementation of the second aspect The feedback processing unit includes: a determining subunit, a processing subunit, and a feedback subunit;

Determining a sub-unit, configured to determine a priority of each CSI according to a preset rule; the processing sub-unit, configured to reserve a CSI or a priority with the highest priority in a priority of each CSI determined according to the determining sub-unit The feedback of the RI in the highest CSI until the sum of the reserved CSIs is equal to or maximally less than the sum of the CSI thresholds or the retained RIs is equal to or maximally less than the RI threshold;

The feedback subunit is configured to feed back, to the base station, the RI in the CSI or CSI reserved by the processing subunit.

In a fourth possible implementation, in combination with the second or third possible implementation of the second aspect, the determining subunit is specifically configured to:

Determine the priority of the CSI of each CSI process according to the CSI process number;

With reference to the second or third possible implementation manner of the second aspect, in a fifth possible implementation, the determining sub-unit is specifically configured to: trigger a signaling triggered CSI set according to the received CSI feedback The location number of the CSI determines the priority of the CSI.

With reference to the second, third, fourth or fifth possible implementation of the second aspect, in a sixth possible implementation, the determining subunit is specifically configured to: The priority of the CSI that is fed back in the feedback and/or the priority of the CSI that does not change the RI of the CSI in the last two aperiodic reports is determined as the first priority, and the priorities of the other CSIs are determined as the second priority, The first priority is lower than the second priority.

With reference to the second or third possible implementation of the second aspect, in a seventh possible implementation, the determining subunit is specifically configured to: determine a priority of each CSI according to at least one of the following parameters: Quality indication, channel capacity, UE processing capability; The feedback subunit is further configured to feed back, to the base station, the identification information of the CSI that is not abandoned or reserved; and/or feed back the identification information of the abandoned or unreserved CSI to the base station.

In an eighth possible implementation manner, in combination with the first to seventh possible implementation manners of the second aspect, the feedback processing unit is configured to feed back, to the base station, the RI in the partial CSI or the partial CSI, including: The RI code of the total number of bits in the reserved CSI is reported to the base station, and the total number of bits B is less than or equal to the total number A of RI information in the CSI of the trigger feedback.

The feedback processing unit reports the RI code of the total number of bits in the CSI that has not been abandoned or reserved to the base station, including:

A Reed-Muller RM code with a length of 32 base sequences is used to encode and report the RI with a total number of bits of B bits, where N is the smallest integer not less than (B + 1 1 );

Or, using a tail-biting convolutional code to encode and report the RI with a total number of bits of B bits;

Or, when the total number of bits B is less than or equal to 22, a Reed-Muller code having a length of 32 base sequences is used to encode an RI having a total number of bits of B bits, where N is not less than (B + 1 1 ) The smallest integer; when the total number of bits B is greater than 22, the RI of the total number of bits is B-bit encoded by the tail-biting convolutional code.

The bite-tailed convolutional code is used to encode and report the RI with a total number of bits of B bits, including:

In a ninth possible implementation, the feedback processing unit feeds back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback, including: Determining the feedback of the RI in the partial CSI or part of the CSI according to at least one of the following parameters: channel quality indication, channel capacity, UE processing capability;

The base station is fed back the RI in the non-abandoned CSI or part of the CSI, and the identification information of the CSI that has not been abandoned and/or the identification information of the discarded CSI.

In a tenth possible implementation manner, the feedback processing unit is further configured to: when the total number C of CSIs of the trigger feedback exceeds a CSI limit value, or the total number of RI information in the CSI of the trigger feedback exceeds an RI limit value. At the time, CSI aperiodic feedback corresponding to the CSI feedback trigger signaling is not performed.

In a third aspect, a user equipment UE is further provided, comprising: a receiver, a transmitter, a memory, and a processor respectively connected to the receiver, the transmitter and the memory, wherein the memory stores a set of programs a code, the processor invoking program code in the memory for performing a processing method of channel state information aperiodic feedback provided by the first aspect.

In a fourth aspect, a method for processing channel state information CSI aperiodic feedback is provided, including:

The base station sends the CSI feedback triggering signaling to the user equipment UE, where the total number C of CSIs triggered by the CSI feedback trigger signaling does not exceed the CSI threshold or the total number A of RI information in the CSI that triggers feedback does not exceed the RI threshold; The UE is caused to perform CSI aperiodic feedback corresponding to the CSI feedback trigger signaling.

In a first possible implementation, the CSI threshold and the RI threshold are bit thresholds.

In a second possible implementation manner, in combination with the first possible implementation manner of the fourth aspect, the CSI threshold value and the RI threshold value are a predefined positive integer of the base station or sent by the UE A positive integer given to the base station.

In a third possible implementation manner, in combination with the first and second possible implementation manners of the sixth aspect, the CSI is a CSI corresponding to a CSI process in a carrier.

In a fifth aspect, a base station is provided, including:

Processing unit, configured to generate CSI feedback trigger signaling

a transmitting unit, configured to send, to the user equipment UE, the CSI generated by the processing unit Feedback triggering signaling, the total number C of CSIs triggered by the CSI feedback trigger signaling does not exceed the CSI threshold or the total number A of RI information in the CSI that triggers feedback does not exceed the RI threshold value, so that the UE performs corresponding to The CSI feedback triggers CSI aperiodic feedback of signaling.

In a second possible implementation manner, in combination with the first possible implementation manner of the fifth aspect, the CSI threshold value and the RI threshold value are a predefined positive integer of the base station or sent by the UE A positive integer given to the base station.

In a third possible implementation manner, in combination with the first and second possible implementation manners of the fifth aspect, the CSI is a CSI corresponding to a CSI process in a carrier.

In a sixth aspect, a base station is provided, including: a receiver, a transmitter, a memory, and a processor respectively connected to the receiver, the transmitter, and the memory, the memory storing a set of program codes, the processor The program code in the memory is invoked to perform the method provided in the fourth aspect of the right.

The method and the device for processing the CSI aperiodic feedback provided by the foregoing technical solution, the UE determines the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers feedback according to the received CSI feedback trigger signaling to perform CSI. Aperiodic feedback, when the C or A value is large, abandon part of CSI or part of CSI RI, encode RI of non-abandoned CSI by RM or tail biting convolutional code; or do not perform CSI The aperiodic feedback, when the C or A value is small, directly encodes the RI of the CSI by the RM or the tail biting convolutional code, and can perform different processing feedback on the RI information exceeding 15 bits.

In addition, the total number of CSIs in the CSI that the UE needs to feed back to the base station may be determined by limiting the total number C of CSIs triggered by the CSI feedback trigger signaling sent by the base station to the UE or the total number of RI information in the CSI that triggers the feedback. A is within the range of the number of RI bits reported by the UE, so that the UE performs normal CSI aperiodic feedback.

DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

FIG. 1 is a schematic flowchart of a method for processing CSI aperiodic feedback according to an embodiment of the present invention;

2 is a structural block diagram of a UE according to an embodiment of the present invention;

FIG. 3 is a structural block diagram of another UE according to an embodiment of the present disclosure;

4 is a structural block diagram of another UE according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a base station according to an embodiment of the present invention;

FIG. 6 is a structural block diagram of another base station according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a method for processing CSI aperiodic feedback. As shown in FIG. 1, the method includes:

101. The UE determines, according to the received CSI feedback trigger signaling, the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback.

The aperiodic feedback of the CSI refers to the feedback of the CSI triggered by the CSI feedback trigger signaling sent by the UE by the base station. After receiving the CSI feedback trigger signaling, the UE may determine the total number C of CSIs that the base station requires to feed back, or the total number A of RI information in the CSI that the base station requests to feed back.

102. The UE feeds back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback, or CSI aperiodic feedback corresponding to the CSI feedback trigger signaling is not performed.

It should be noted that the CSI described in this embodiment and the following embodiments is the CSI corresponding to the CSI process in the carrier.

Optionally, the UE may feed back part of the CSI or part of the CSI to the base station when the total number C of CSIs that trigger the feedback is greater than the CSI threshold or the total number of RI information in the CSI of the trigger feedback is greater than the RI threshold. The RI is such that the sum of the fed back CSI is less than or equal to the sum of the CSI threshold or the fed back RI is less than or equal to the RI threshold.

When the total number C of CSIs that trigger the feedback is greater than the CSI threshold, the UE may feed back the RI in the partial CSI or the partial CSI to the base station, and the sum of the fed back CSIs is less than or equal to the CSI threshold. Alternatively, the CSI sum of the fed back RI is less than or equal to the CSI threshold. Or, when the total number A of RI information in the CSI that triggers the feedback is greater than the RI threshold, the UE feeds back the RI in the partial CSI or the partial CSI to the base station, and the sum of the RIs of the fed back CSI is less than or equal to The RI threshold is used, or the sum of the fed back RIs is less than or equal to the RI threshold.

The CSI threshold value and the RI threshold value described herein may be a bit number threshold value or a number threshold value, which is not limited herein. The CSI threshold and the RI threshold are a positive integer predefined by the UE or a positive integer sent by the base station to the UE.

When the C or A exceeds the corresponding threshold, the UE will abandon the feedback of the RI in the partial CSI, or give up the feedback of the partial CSI. The CSI includes the RI, the PMI, the CQI, and the like. When the UE abandons the feedback of the RI in the partial CSI, the CQI and the PMI corresponding to the RI in the discarded partial CSI are still fed back, and the abandoned part of the CSI fed back by the UE The CQI and PMI corresponding to the RI in the middle are determined based on the RI in the same CSI of the last time. After receiving the CSI of the RI, the base station may determine the RI in the discarded CSI according to the RI in the same CSI that was last received on the UE.

Optionally, the UE may first determine the priority of each CSI according to a preset rule, and then discard the CSI with the lowest priority or prioritize according to the priority of each CSI. Feedback of the RI in the lowest CSI, until the sum of the CSIs that are not abandoned is less than or equal to the CSI threshold or not The sum of the discarded RIs is less than or equal to the RI threshold, and the RI in the non-abandoned CSI or CSI is fed back to the base station. In addition, the UE may further implement the following: the UE retains the feedback of the CSI with the highest priority or the RI with the highest priority according to the priority of the CSI until the sum of the reserved CSIs is equal to or minimized. The sum of the CSI threshold or the reserved RI is equal to or maximally less than the RI threshold, and the RI in the reserved CSI or CSI is fed back to the base station. The sum of the reserved CSI is less than the CSI threshold to the maximum: it is assumed that the reserved CSI is C ( i ) , where i is a positive integer; the CSI threshold is Y. When C ( 1 ) + C ( 2 ) + ...

+C ( i ) <Y , JL C ( 1 ) +C ( 2 ) +... +C ( i ) + C ( i+ 1 ) > Y, the sum of the retained CSI is at most less than the CSI threshold value. The sum of the retained RIs is substantially less than the meaning of the RI threshold, and is not described here.

The UE may determine the priority of each CSI according to a preset rule in the following manners:

Manner 1: The CSI priority of each CSI process is determined according to the CSI process number. In an LTE system that supports the CoMP and CA technologies, the UE needs to report the CSI of the multi-carrier multi-process in turn, and each carrier has multiple CSI processes. The CSI priority is determined according to the CSI process ID. Optionally, the CSI priority with the lowest CSI process number is set to the highest. The CSI priority is decreased according to the increase of the CSI process number. The UE discards the RI in the one or more CSIs with the lowest priority or discards the CSI with the lowest priority, until the number of reported CSIs is less than or equal to the CSI threshold value or the number of reported RI bits is less than or equal to the said RI bit threshold. If there are multiple CSIs with the same priority, the RIs of the multiple CSIs with the same priority or the multiple CSIs with the same priority may be discarded. According to the above, the CSI priority with a lower CSI process number is always higher than the CSI priority with a higher CSI process number. The specific examples are as follows. Assume that there are three carrier numbers 0, 1, and 2, and three process numbers in each carrier are 0, 1, and 2. The priority determined according to mode 1 is as shown in Table 1: Load

Process excellent

Table 1

Currently, the UE only supports encoding of RIs of up to 15 bits, and the RI of each CSI is up to 3 bits. Therefore, it is generally considered that the UE reports up to 5 CSIs at a time. Therefore, it is assumed here that the CSI threshold is a threshold. And if the value is 5, the UE will abandon the CSI with the lowest priority until the 6 CSIs with the lowest priority are discarded, so that the sum of the feedback CSIs is 3 is smaller than the CSI threshold 5. Here, the UE discards the CSI of Carrier 2, CSI Process 2 of Carrier 1 and Carrier 0, and the CSI of Carrier 2, Carrier 1 and CSI Process 1 of Carrier 0.

The above example is based on the increase of the CSI process number, and the CSI priority is decreased in turn. Of course, the UE may also increase the priority of the CSI according to the CSI process number, as long as the CSI priority of each CSI process is determined according to the CSI process number. It is possible that the higher the number of the CSI process, the higher the priority or the lower the number is not limited, and can be understood by a wide variety of situations, which can be clearly understood by those skilled in the art, and is not exemplified here.

Mode 2: Determine the CSI priority of each CSI process based on the carrier number.

In an LTE system that supports the CoMP and CA technologies, the UE needs to report the CSI of the multi-carrier multi-process in turn, and each carrier has multiple CSI processes. The CSI priority is determined according to the carrier number. Optionally, the CSI priority with the lowest carrier number can be set to the highest. According to the increase of the carrier number, the CSI priority is sequentially decreased. The UE abandons the RI of the one or more CSIs with the lowest priority or discards the CSI with the lowest priority, until the number of reported CSIs is less than or equal to the CSI number threshold or the number of reported RI bits is less than or equal to the said RI bit threshold. If there are multiple CSIs with the same priority, the RIs of the multiple CSIs with the same priority or the multiple CSIs with the same priority may be discarded. According to the above, the CSI priority with a lower carrier number is always higher than the CSI priority with a higher carrier number. The specific examples are as follows, assuming there are 3 carrier numbers. 0, 1, 2, 3 process numbers in each carrier are 0,

The determined priorities are shown in Table 2:

Table 2

Currently, the UE only supports encoding of RIs of up to 15 bits, and the RI of each CSI is up to 3 bits. Therefore, it is generally considered that the UE reports up to 5 CSIs at a time. Therefore, it is assumed here that the CSI threshold is a threshold. And if the value is 5, the UE will abandon the CSI with the lowest priority until the 6 CSIs with the lowest priority are discarded, so that the sum of the CSIs of the feedback 3 is smaller than the CSI threshold 5. Here, the UE discards the CSI of carrier 2, the CSI of C2, and the CSI of carrier C, 0, 1, and 2.

The above example is based on the increase of the carrier number, and the CSI priority is sequentially decreased. Of course, the UE may also increase the priority of the CSI according to the increase of the carrier number, as long as the CSI priority of each carrier is determined according to the carrier number. The higher the carrier number, the higher the priority or the lower the number is not limited. There can be many cases, and those skilled in the art can clearly understand that it is no longer exemplified here.

Method 3: First, the CSI priority of each CSI process is determined according to the order of the CSI process numbers, and then the CSI priorities of the carriers having the same CSI process number are determined according to the order of the carrier numbers.

In an LTE system that supports the CoMP and CA technologies, the UE needs to report the CSI of the multi-carrier multi-process in turn, and each carrier has multiple CSI processes. First, the CSI priority is determined according to the CSI process ID. Optionally, the CSI priority with the lowest CSI process number is set to the highest. The CSI priority is decreased according to the increase of the CSI process number. Then, the CSI is determined according to the sequence of the carrier number. The priority of the CSI of each carrier with the same process number is set to the highest priority of the CSI with the lowest carrier number in the unified CSI process. The CSI priority is sequentially decreased according to the increase of the carrier number. UE gives up the lowest priority The RI of the one or more CSIs or the CSI with the lowest priority is discarded until the number of reported CSIs is less than or equal to the CSI threshold or the number of reported RIs is less than or equal to the RI bit threshold. According to the above, the CSI priority with a lower CSI process number is always higher than the CSI priority with a higher CSI process number. A specific example is as follows. Assume that there are three carrier numbers 0, 1, and 2, and three process numbers in each carrier are 0, 1, and 2. The priority determined according to mode 1 is as shown in Table 3:

table 3

Currently, the UE only supports encoding of RIs of up to 15 bits, and the RI of each CSI is up to 3 bits. Therefore, it is generally considered that the UE reports up to 5 CSIs at a time. Therefore, it is assumed here that the CSI threshold is a threshold. And if the value is 5, the UE will abandon the CSI with the lowest priority until the CSI with the lowest priority is discarded, so that the sum of the feedback CSIs is less than or equal to the CSI threshold 5. Here, the UE discards the CSI of Carrier 2, Carrier 1 and Carrier 0 CSI Process 2 and Carrier 2 CSI Process 1 CSI.

The above example is based on the increase of the CSI process number and the carrier number, and the CSI priority is sequentially decreased. Of course, the UE may also increase the priority of the CSI according to the increase of the CSI process number and the carrier number, as long as the CSI process number is determined in the order of the CSI process number. The priority of the CSI of each CSI process is determined, and then the CSI priority of each carrier with the same CSI process number is determined according to the sequence of the carrier number. The higher the CSI process or carrier number, the higher the priority or the lower the priority. Without limitation, it can be understood by a wide variety of situations, which will be apparent to those skilled in the art, and are not exemplified herein.

Method 4: First, the CSI priority of each carrier is determined according to the order of the carrier numbers, and then the CSI priorities of the CSI processes with the same carrier number are determined according to the order of the CSI process numbers. In mode 2, the CSI priority is first determined according to the carrier number. Optionally, the CSI with the lowest carrier number is set to the highest priority. The CSI priority is decreased according to the increase of the carrier number. Then, according to the CSI process number. The priority of the CSI of each CSI process with the same carrier number is determined in sequence. The CSI priority of the CSI process number in the multiple CSI processes of the same carrier is set to be the highest, and the CSI priority is sequentially decreased according to the increase of the CSI process number. The UE discards the RI of the one or more CSIs with the lowest priority or discards the CSI with the lowest priority, until the number of reported CSIs is less than or equal to the CSI number threshold or the number of reported RI bits is less than or equal to the said RI bit threshold. According to the above, the CSI priority with a lower carrier number is always higher than the CSI priority with a higher carrier number. It is still assumed that there are 3 carrier numbers 0, 1, and 2, and 3 process numbers in each carrier are 0, 1, and 2, and the priority determined according to mode 1 is as shown in Table 4:

Table 4

Currently, the UE only supports encoding of RIs of up to 15 bits, and the RI of each CSI is up to 3 bits. Therefore, it is generally considered that the UE reports up to 5 CSIs at a time. Therefore, it is assumed here that the CSI threshold is a threshold. And if the value is 5, the UE will abandon the CSI with the lowest priority until the CSI with the lowest priority is discarded, so that the sum of the feedback CSIs is less than or equal to the CSI threshold 5. Here, the UE relinquishes the CSI of Carrier 2, the CSI of 1, and 0, and the CSI of CSI Process 2 of Carrier 1 or the RI of these CSIs.

The above example is based on the increase of the carrier number and the CSI process number, and the CSI priority is sequentially decreased. Of course, the UE may also increase the priority of the CSI according to the increase of the carrier number and the CSI process number, as long as the order is based on the sequence of the carrier numbers. Determine the CSI priority of each CSI process, and then determine the CSI priority of each CSI process with the same carrier number according to the CSI process ID. The number of the carrier or CSI process. The higher the priority, the lower the level is not limited, and it can be understood by a variety of situations, which can be clearly understood by those skilled in the art, and is not exemplified here.

Manner 5: The priority of the CSI is determined in the order of the CSI location numbers in the CSI set triggered by the received CSI feedback trigger signaling.

Optionally, the UE may use the CSI priority of the first CSI in the CSI set triggered by the CSI trigger signaling to be the highest, and the last CSI priority is the lowest, and the CSI priority is added according to the CSI location number in the set. The level is lowered in turn. Of course, the CSI priority may also be increased in turn according to the increase of the location number of the CSI in the set.

The UE abandons one or more CSIs with the lowest priority or abandons the RIs of the one or more CSIs with the lowest priority until the reported CSI is less than or equal to the CSI threshold or the reported RI is less than or equal to the RI threshold. .

Mode 6: determining the priority of the CSI reported in the latest aperiodic feedback and/or determining the priority of the CSI whose CSI of the CSI in the last two aperiodic reports is unchanged is the first priority, and other CSI priorities Determined as a second priority, the first priority is lower than the second priority.

If there are multiple CSIs reported in the latest aperiodic report and/or CSIs that have not changed in the last two aperiodic reports, the UE may further determine the first according to any one of modes 1 to 5. Priority of each CSI in all CSIs in the priority; if there are multiple CSIs other than the CSI reported in the latest aperiodic reporting and/or the CSI in the last two aperiodic reportings that have not changed, then Any one of modes 1 to 5 further determines the priority of each CSI in all CSIs in the second priority. The UE abandons one or more CSIs with the lowest priority or abandons the RIs of the one or more CSIs with the lowest priority until the reported CSI is less than or equal to the CSI threshold or the reported RI is less than or equal to the RI threshold. .

Mode 7: The UE determines a priority of each CSI according to at least one of the following parameters: a channel quality indicator, a channel capacity, and a UE processing capability.

Optionally, the UE may determine a priority of each CSI according to the channel quality indicator, and the better the channel quality, the higher the priority of the CSI; or determine the priority of each CSI according to the channel capacity, the larger the channel capacity, the priority of the CSI. Higher; or according to channel quality The indication and the channel capacity are used together to determine the priority of the CSI. For example, the UE determines the priority of the CSI according to the quality of the channel first, and then determines the priority of the CSI according to the size of the channel capacity for the CSI with the same channel quality. . In summary, the UE may determine the priority of each CSI according to at least one of the following parameters: channel quality indication, channel capacity, and UE processing capability.

After determining the priority of the CSI, the UE application mode 7 feeds back to the base station the identification information of the CSI that has not been abandoned or reserved and/or the identification information of the discarded or unreserved CSI. Optionally, the identifier information of the non-abandoned CSI may be an index of a CSI that is not discarded or an index of a CSI that is not discarded, and the identifier information of the discarded partial CSI may be a part of the CSI that is discarded. Index of the CSI of the RI or the index of the CSI of the discarded RI; the method for implementing the identification information of the multiple CSIs that are not discarded on the base station or the identification information of the discarded partial CSI may also be: The bit corresponding to the CSI of the non-abandoned CSI or the CSI of the non-abandoned RI is set to a first predefined value, and the bit corresponding to the CSI of the discarded CSI or the discarded RI is set to a second predefined value, and the pre- The identifier information of the defined CSI is sent to the base station, and the base station can know which CSI the UE sends according to the first predefined value and/or the second predefined value. Of course, there are many ways for the UE to send the identification information of the CSI that is not discarded to the base station and/or the identification information of the discarded CSI. The person skilled in the art can easily think of it here. Detailed.

Optionally, the UE may perform aperiodic feedback of CSI according to the limitation of CSI or RI number or number of bits, or autonomously perform CSI aperiodic feedback without CSI or RI number or number of bits. .

The UE determines to give up feedback of the RI in part of the CSI or part of the CSI according to at least one of the following parameters: channel quality indication, channel capacity, UE processing capability, and then feeds back the RI in the non-abandoned CSI or part of the CSI to the base station. And the identification information of the CSI that has not been abandoned and/or the identification information of the discarded CSI.

After discarding the RI of the partial CSI or CSI by using the foregoing various methods, the UE may perform step 1021: feeding back the RI in the non-abandoned CSI or CSI to the base station, that is, feeding back the reserved CSI or CSI to the base station. In the RI. The non-abandoned CSI described herein also includes CSI that has only been abandoned RI. Here, the feeding back the RI in the non-abandoned CSI or CSI to the base station includes: reporting the RI code of the total number of bits in the non-abandoned CSI to the base station, where the B is less than or equal to the A . When the C is greater than the CSI threshold or the A is greater than the RI threshold, the RI of the partial CSI or CSI needs to be discarded, and the B is less than A; when the C is less than or equal to the CSI threshold or the When A is less than or equal to the RI bit threshold, it is not necessary to discard the RI of a part of CSI or CSI, and the B is equal to A. The CSI includes information such as RI, PMI, and CQI, where the RI is independently encoded. In the prior art, the UE can only jointly encode the 15-bit RI. The number of encoded bits of other information in the CSI is not limited. , can be directly encoded and reported.

The RI code of the total number of bits in the non-abandoned CSI is reported to the base station, and includes: encoding and reporting the RI of the B bit by using RM codes of N base sequence lengths of 32, where N is not less than (B + 1 1 ) The smallest integer; or, the B-bit RI is encoded and reported using a tail-biting convolutional code; or, when B is less than or equal to 22, the B-bit RI is performed using N-base sequence length 32 encodings. Encoding, where N is not less than

The smallest integer of B + 1 1 ); when B is greater than 22, the RI of the B bit is encoded using a tail biting convolutional code.

The B-bit RI is encoded and reported by using a tail-biting convolutional code, including: calculating the number of bits after the tail-biting convolution coding of the RI according to the following formula:

(B+CRC check bit number) ÷ PUSCH coding rate X, wherein the high layer signaling by the base station is notified to the UE; and the biting tail convolutional code is used according to B and the calculated number of bits obtained by the calculation. The B-bit RI is encoded and reported.

If the UE encodes the RI information bits by using a tail-biting convolutional code, the UE needs to know the number of RI bits and the number of encoded bits, and the number of bits after the RI encoding can be notified to the UE according to the high layer signaling. Specifically, the number of encoded bits is equal to (the number of RI bits + the number of CRC check bits) ÷ PUSCH coding rate X. The CRC (Cyclic Redundancy Check) check bit number is a predefined value, which can be 0 or a positive integer. If it is 0, it means there is no CRC check. PUSCH (Physical Uplink Shared Channel) The coding rate is equal to the number of data information bits transmitted on the PUSCH divided by the number of bits after data coding.

Optionally, when the RI in the partial CSI or the partial CSI is fed back to the base station, the UE may determine the part of the partial CSI of the feedback according to at least one of the following parameters: a channel quality indicator, a channel capacity, and a UE processing capability. a CSI; and setting the CQI in the first CSI to 0 for feedback to the base station. In this way, when the UE considers that the CSI is not worth reporting, it does not need to measure the CQI in the first CSI, which reduces the workload of the UE. After receiving the CSI, the base station parses the CQI of the CSI to 0, and knows that the channel state corresponding to the CQI is not good, and the channel state information is not used.

In the foregoing method step, when the C is greater than the CSI threshold or the A is greater than the RI threshold, the UE may discard part of the CSI or discard the RI of the partial CSI, optionally, When C is greater than the CSI threshold or the A is greater than the RI threshold, the UE may not perform aperiodic feedback of CSI.

In addition, the UE may further obtain a CSI limit value or an RI limit value by using a high-level signaling, where the CSI limit value is greater than or equal to the CSI threshold, and the RI limit value is greater than or equal to the RI threshold. .

When the CSI limit value is greater than the CSI threshold value, and the RI limit value is greater than the RI threshold value, the UE may be when the C is greater than a CSI limit value or the A is greater than the RI limit value. Do not perform aperiodic feedback of CSI; when the CSI threshold ≤ C ≤ CSI limit value, or RI threshold ≤ A ≤ RI limit value, the above abandonment step is performed; of course, if the C is less than the CSI limit value or When the A is smaller than the RI limit, the UE may directly report the RI code to the base station according to the coding mode described in step 1021.

When the CSI limit value is equal to the CSI threshold value, and the RI limit value is equal to the RI threshold value, the UE may be when the C is greater than a CSI limit value or the A is greater than the RI limit value, The aperiodic feedback of CSI is not performed; the above-mentioned abandonment step may also be performed when the C is greater than the CSI limit or the A is greater than the RI limit.

Certainly, the UE may also trigger the feedback regardless of the CSI feedback trigger signaling. The total number of CSIs or the total number of RI bits A in the CSI is reported directly to the base station according to the coding method described in step 1021.

Embodiments of the present invention further provide an apparatus embodiment for implementing the steps and methods in the foregoing method embodiments. Embodiments of the present invention are applicable to UEs in various communication systems.

As shown in FIG. 2, a UE is further provided in the embodiment of the present invention, where the UE includes: a determining unit 21 and a feedback processing unit 22.

The determining unit 21 is configured to determine, according to the received CSI feedback trigger signaling, the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback.

The feedback processing unit 22 is configured to feed back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs triggered by the determining unit 21 or the total number A of RI information in the CSI that triggers the feedback, or does not perform corresponding CSI aperiodic feedback of the CSI feedback trigger signaling. It should be noted that the CSI described herein is the CSI corresponding to the CSI process in the carrier.

Optionally, the feedback processing unit is specifically configured to: when the total number C of CSIs of the trigger feedback is greater than a CSI threshold or the total number A of RI information in the CSI of the trigger feedback is greater than an RI threshold, The RI in the partial CSI or part of the CSI is such that the sum of the fed back CSI is less than or equal to the sum of the CSI threshold or the fed back RI is less than or equal to the RI threshold.

As shown in FIG. 3, the feedback processing unit 22 includes: a determining subunit 221, a processing subunit 222, and a feedback subunit 223.

Optionally, the determining sub-unit 221 is configured to determine a priority of each CSI according to a preset rule, where the processing sub-unit 222 is configured to give priority to the priority of each CSI determined according to the determining sub-unit 221 Feedback of the RI in the lowest CSI or the lowest priority CSI until the sum of the non-abandoned CSI is less than or equal to the sum of the CSI threshold or the non-abandoned RI is less than or equal to the RI threshold The feedback sub-unit 223 is configured to feed back the RI in the non-abandoned CSI or CSI to the base station according to the partial CSI or the RI in the CSI discarded by the processing sub-unit 222.

Alternatively, the determining subunit 221 is configured to determine a priority of each CSI according to a preset rule; the processing subunit 222 is configured to determine the subunit 221 according to the determining Determining the priority of each CSI to retain the feedback of the highest priority CSI or the highest priority CSI in the CSI until the sum of the reserved CSIs is equal to or maximally less than the CSI threshold or the reserved RI The sum is equal to or the maximum is less than the RI threshold; the feedback subunit 223 is configured to feed back, to the base station, the RI in the CSI or CSI reserved by the processing subunit 222.

The determining the sub-unit 221 is specifically configured to: determine a CSI priority of each CSI process according to the CSI process ID; or determine a CSI priority of each carrier according to the carrier number; or, first, determine, according to the CSI process ID, each CSI process The priority of the CSI, and then determining the CSI priority of each carrier with the same CSI process number according to the carrier number; or, first, determining the CSI priority of each carrier according to the carrier number, and then determining each CSI with the same carrier number according to the CSI process number. The priority of the process's CSI. Or the determining subunit is specifically configured to determine a priority of the CSI according to the location number of the CSI in the CSI set triggered by the received CSI feedback trigger signaling.

The determining sub-unit 221 may be further configured to determine a priority of the CSI that is fed back in the latest CSI aperiodic feedback and/or a priority of the CSI that does not change the RI of the CSI in the last two aperiodic reports as the first Priority, the priority of other CSIs is determined as a second priority, and the first priority is lower than the second priority. If there are multiple CSIs reported in the last aperiodic report and/or CSIs that have not changed in the last two aperiodic reports, the UE may further determine the first according to any one of modes 1 to 5. Priority of each CSI in all CSIs in the priority; if there are multiple CSIs other than the CSI reported in the latest aperiodic reporting and/or the CSI in the last two aperiodic reportings that have not changed, then Any one of modes 1 to 5 further determines the priority of each CSI in all CSIs in the second priority. The UE abandons one or more CSIs with the lowest priority or abandons the RIs of the one or more CSIs with the lowest priority until the reported CSI is less than or equal to the CSI threshold or the reported RI is less than or equal to the RI threshold. .

Optionally, the determining subunit 221 is specifically configured to: determine a priority of each CSI according to at least one of the following parameters: a channel quality indicator, a channel capacity, and a UE processing capability. . At this time, the feedback subunit 223 feeds back the non-abandoned CSI to the base station. Or the RI in the CSI is the reserved CSI or the RI in the CSI, and is used to feed back the identification information of the CSI that has not been abandoned or reserved to the base station; and/or feed back the identification information of the discarded or unreserved CSI to the base station. The identifier information of the CSI that is not abandoned or reserved includes: an index and/or a quantity of the CSI that is not abandoned or reserved; and the identifier information of the discarded or unreserved CSI includes: the abandoned or not The index and/or number of reserved CSIs.

The feedback processing unit 22 feeds back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback, including: according to at least one of the following parameters: channel quality Indication, channel capacity, UE processing capability, determining to discard part of CSI or part of CSI; feeding back to the base station the RI in the non-abandoned CSI or part of the CSI, and the identification information of the CSI that was not discarded and/or abandoned CSI identification information. The identifier information of the non-abandoned CSI includes: an index and/or a quantity of the CSI that is not discarded; and the identifier information of the discarded CSI includes: an index and/or a quantity of the discarded CSI.

The feedback processing unit is configured to report the RI in the partial CSI or the partial CSI to the base station, including: reporting the RI code of the total number of bits in the non-abandoned CSI to the base station, where the B is less than or equal to the A.

The feedback processing unit 22 reports the RI code of the total number of bits in the non-abandoned CSI to the base station, including: using the Reed-Muller RM code with a base sequence length of 32 to perform the B-bit RI. Encoded and reported, where N is the smallest integer not less than (B + 1 1 ); or, the B-bit RI is encoded and reported using a tail-biting convolutional code; or, when B is less than or equal to 22, N base sequences are used A Reed-Muller code of length 32 encodes the B-bit RI, where N is the smallest integer not less than (B ÷ ll ); when B is greater than 22, the B-bit RI is encoded using a tail-biting convolutional code .

The bit tailing convolutional code encodes and reports the B bit RI, including:

The number of bits obtained by performing tail-biting convolutional coding on the RI is calculated according to the following formula: (B+CRC check bit number) ÷ PUSCH coding rate X. , wherein the ^μ is notified to the UE by high layer signaling of the base station; The number of bits after encoding is encoded and reported by the bite-tail convolutional code.

The feedback processing unit 22 is further configured to: when the total number C of CSIs that trigger the feedback exceeds the CSI limit value or the total number A of RI information in the CSI of the trigger feedback exceeds the RI limit value, does not perform corresponding to the CSI The CSI aperiodic feedback of the triggering signaling, where the CSI limit value is greater than or equal to the CSI threshold, the RI limit value is greater than or equal to the RI threshold; the CSI limit value and the RI limit value are A positive integer that is pre-defined by the UE or sent by the base station to the UE through high-layer signaling.

The feedback processing unit 22 is configured to feed back the RI in the partial CSI or the partial CSI to the base station, including: determining, according to at least one of the following parameters: a channel quality indicator, a channel capacity, and a UE processing capability, a part of the partial CSI of the feedback. a CSI; setting the CQI in the first CSI to 0 to feed back to the base station.

In the hardware implementation, the above feedback sub-unit 223 may be a transmitter or a transceiver, and the unit for receiving the CSI feedback trigger signaling may be a receiver or a transceiver, and the feedback sub-unit and the unit for receiving information may be integrated. The transceiver unit is implemented as a transceiver corresponding to hardware. The feedback processing unit 22 above may be embedded in the processor of the base station in hardware or software. The processor can be a central processing unit (CPU) or a microcontroller.

As shown in FIG. 4, it is a structural block diagram of a UE, which includes a transmitter 41, a receiver 42, a memory 43, and a processing respectively connected to the transmitter 41, the receiver 42, and the memory 43 according to an embodiment of the present invention. 44. Of course, the UE may also include a common component such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device. The embodiment of the present invention does not impose any limitation herein.

The processor 44 is configured to store a set of program codes, and the processor 44 is configured to call the program code stored in the memory 43 for performing the following operations: The processor 44 determines the trigger feedback according to the CSI feedback trigger signaling received by the receiver 42. The total number C of CSIs or the total number of RI information in the CSI that triggers feedback; and feedback part CSI or part to the base station through the transmitter 41 according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback RI in CSI. Alternatively, the UE does not perform aperiodic feedback of CSI. The processor 44 feeds back the RI in the partial CSI or the partial CSI to the base station according to the total number C of CSIs that trigger the feedback or the total number A of RI information in the CSI that triggers the feedback, including: the total number C of CSIs in the trigger feedback When the total number of RI information in the CSI greater than the CSI threshold or the trigger feedback is greater than the RI threshold, the RI in the partial CSI or part of the CSI is fed back to the base station, so that the sum of the feedback CSIs is less than or equal to the CSI gate. The sum of the limits or the RI of the feedback is less than or equal to the RI threshold.

Optionally, the processor 44 determines the priority of each CSI according to a preset rule; abandon feedback of the lowest priority CSI or the lowest priority CSI according to the priority of each CSI, until the CSI is not abandoned. The sum of the sum is less than or equal to the CSI threshold or the sum of the RIs that are not discarded is less than or equal to the RI threshold; and then the RI in the non-abandoned CSI or CSI is fed back to the base station. Alternatively, the processor 44 determines the priority of each CSI according to a preset rule; retains the feedback of the CSI in the highest priority CSI or the highest priority CSI according to the priority of each CSI until the sum of the reserved CSIs The sum equal to or maximally less than the CSI number threshold or the reserved RI is equal to or maximally less than the RI threshold; and then the RI in the reserved CSI or CSI is fed back to the base station.

The determining the priority of each CSI according to the preset rule may be the seven methods according to the methods 1 to 7 in the method embodiment.

The processor 44 feeds back the RI in the partial CSI or the partial CSI to the base station, and includes: reporting the RI code of the total number of bits in the non-abandoned CSI to the base station, where the B is less than or equal to the A. The RI code of the total number of bits in the non-abandoned CSI is reported to the base station, and includes: encoding and reporting the B bit RI by using N Reed-Muller RM codes having a base sequence length of 32, where N Is the smallest integer not less than ( B ÷ ll ); or, the B-bit RI is encoded and reported using a tail-biting convolutional code; or, when B is less than or equal to 22, the N-based sequence length is 32 Reed - The Mueller code encodes the B-bit RI, where N is the smallest integer not less than (B + 1 1 ); when B is greater than 22, the B-bit RI is encoded and reported using the tail-biting convolutional code. The encoding and reporting the B-bit RI by using the tail-biting convolutional code includes: calculating the number of bits after the tail-biting convolution encoding of the RI according to the following formula: (B+CRC school) 比特 bit number) ÷ PUSCH coding rate x, wherein the high-level signaling by the base station is notified to the UE; according to B and the number of encoded bits obtained by the calculation, the bite-tailed convolutional code is used for the B-bit RI Encoded and reported.

Optionally, the processor 44 does not perform the CSI feedback when the total number C of CSIs that trigger the feedback exceeds the CSI limit value or the total number of RI information in the CSI of the trigger feedback exceeds the RI limit value. The CSI aperiodic feedback of the triggering signaling, where the CSI limit value is greater than or equal to the CSI threshold, the RI limit value is greater than or equal to the RI threshold; the CSI limit value and the RI limit value are UE A predefined integer that is sent to the UE by the base station through higher layer signaling.

The processor 44 may determine to discard the RI in the partial CSI or the partial CSI according to at least one of the following parameters: channel quality indication, channel capacity, UE processing capability, and feed back the unresolved CSI or part to the base station through the transmitter 41. The RI in the CSI, and the identification information of the abandoned CSI. The identifier information of the non-abandoned CSI includes: an index and/or a quantity of the CSI that is not discarded; and the identifier information of the discarded CSI includes: an index and/or a quantity of the discarded CSI.

The processor 44, by using the transmitter 41, to feed back the RI in the partial CSI or the partial CSI to the base station, includes: the processor 44 determines the feedback according to at least one of the following parameters: a channel quality indicator, a channel capacity, and a UE processing capability. a first CSI in a portion of the CSI; setting the CQI in the first CSI to 0 to feed back to the base station.

It should be noted that the UEs shown in FIG. 2, FIG. 3, and FIG. 4 may be used to implement any of the methods provided by the foregoing method embodiments.

When the problem of CSI aperiodic feedback in the CoMP and CA coexistence scenarios is solved, the foregoing embodiment is solved from the UE side. Optionally, the present invention further provides a CSI aperiodic feedback processing method that is solved from the base station side. This problem.

The embodiment of the present invention provides a method for processing CSI aperiodic feedback, including: the base station sends CSI feedback trigger signaling to the user equipment UE, where the total number C of CSI triggered by the CSI feedback trigger signaling does not exceed the CSI threshold or The total number A of RI information in the CSI triggering the feedback does not exceed the RI threshold value; so that the UE performs CSI aperiodic feedback corresponding to the CSI feedback trigger signaling. Here, the total number C of CSIs triggered by the CSI feedback trigger signaling does not exceed the CSI threshold or the total number of RI information in the CSI that triggers the feedback does not exceed the RI threshold, which is triggered by the CSI feedback trigger signaling. The total number C of CSIs in the CSI set does not exceed the CSI threshold or the total number A of RI information in the CSI in the triggered CSI set does not exceed the RI threshold. The CSI is a CSI corresponding to a CSI process in the carrier, and the CSI threshold and the RI threshold are bit thresholds, and may be a threshold value, which is not limited herein. The CSI threshold and the RI threshold are a positive integer predefined by the base station or a positive integer sent by the UE to the base station.

The value of C or A is limited in the CSI feedback triggering signaling sent by the base station to the UE. The total number of RI information in the CSI that the UE needs to feed back to the base station is within the range of the number of RI bits supported by the UE. The UE can report the CSI information to the base station normally.

The embodiment of the present invention further provides a base station. As shown in FIG. 5, the base station includes: a processing unit 501 and a transmitting unit 502.

The processing unit 501 is configured to generate CSI feedback trigger signaling. The transmitting unit 502 is configured to send, to the user equipment UE, the CSI feedback trigger signaling generated by the processing unit 501, where the total number C of CSI triggered by the CSI feedback trigger signaling does not exceed the CSI threshold or the CSI that triggers the feedback. The total number of RI information in the A does not exceed the RI threshold; so that the UE performs CSI aperiodic feedback corresponding to the CSI feedback trigger signaling.

Here, the total number C of CSIs triggered by the CSI feedback triggering signaling does not exceed the CSI threshold value or the total number of RI information in the CSI that triggers feedback does not exceed the RI threshold value, that is, the CSI feedback trigger signaling. The total number C of CSIs in the triggered CSI set does not exceed the CSI threshold or the total number A of RI information in the CSI in the triggered CSI set does not exceed the RI threshold. The CSI is the CSI corresponding to the CSI process in the carrier, and the CSI threshold and the RI threshold are bit thresholds, and may be a threshold value, which is not limited herein. The CSI threshold and the RI threshold are a positive integer predefined by the base station or a positive integer sent by the UE to the base station.

The embodiment of the present invention further provides a base station. As shown in FIG. 6, the base station includes: A receiver 61, a transmitter 62, a memory 63, and a processor 64 connected to the receiver 61, the transmitter 62, and the memory 63, respectively.

The memory 63 stores a set of program codes, and the processor 64 calls the program code in the memory 63 to send CSI feedback trigger signaling to the UE through the transmitter 62, where the CSI feedback triggers the CSI triggered by the signaling. The total number C does not exceed the CSI threshold or the total number of RI information in the CSI that triggers the feedback does not exceed the RI threshold; so that the UE performs CSI aperiodic feedback corresponding to the CSI feedback trigger signaling.

Here, the total number C of CSIs triggered by the CSI feedback triggering signaling does not exceed the CSI threshold value or the total number of RI information in the CSI that triggers feedback does not exceed the RI threshold value, that is, the CSI feedback trigger signaling. The total number C of CSIs in the triggered CSI set does not exceed the CSI threshold or the total number A of RI information in the CSI in the triggered CSI set does not exceed the RI threshold. The CSI is the CSI corresponding to the CSI process in the carrier, and the CSI threshold and the RI threshold are bit thresholds, and may be a threshold value, which is not limited herein. The CSI threshold and the RI threshold are positive integers predefined by the base station or positive integers sent by the U E to the base station.

The CSI aperiodic feedback processing method and device provided by the embodiment of the present invention perform CSI according to the received CSI feedback trigger signaling, and determine the total number C of CSIs that trigger feedback or the total number A of RI information in the CSI that triggers feedback. Aperiodic feedback, when the C or A value is large, discard the RI of part of the CSI or part of the CSI, and encode the RI of the CSI that has not been abandoned by the RM or the tail biting convolutional code; or not The aperiodic feedback of the CSI, when the C or A value is small, directly encodes the RI of the CSI by the RM or the tail biting convolutional code, and can perform different processing feedback on the RI information exceeding 15 bits.

One of ordinary skill in the art can understand that all or all of the above method embodiments are implemented. The foregoing steps may be performed by a hardware associated with a program instruction, and the foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiment; and the foregoing storage medium includes: A variety of media that can store program code, such as RAM, disk, or optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any change or replacement that can be easily conceived by those skilled in the art within the technical scope of the present invention is All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be protected by the scope of the claims

Claims

claims

1. A method for processing channel state information CSI aperiodic feedback, which is characterized by including:

The user equipment UE determines the total number of CSI triggering feedback C or the total number of RI information A in the CSI triggering feedback according to the received CSI feedback triggering signaling;

The UE feeds back the partial CSI or the RI in the partial CSI to the base station according to the total number C of CSI that triggers feedback or the total number of RI information A in the CSI that triggers feedback, or does not perform signaling corresponding to the CSI feedback trigger. CSI aperiodic feedback.

2. The method according to claim 1, characterized in that, the UE feeds back partial CSI or RI in partial CSI to the base station according to the total number C of CSI triggering feedback or the total number A of RI information in CSI triggering feedback. , include:

When the total number C of CSI triggering feedback is greater than the CSI threshold value or the total number A of RI information in the CSI triggering feedback is greater than the RI threshold value, partial CSI or RI in partial CSI is fed back to the base station, so that the feedback The sum of CSI is less than or equal to the CSI threshold value or the sum of fed back RIs is less than or equal to the RI threshold value.

3. The method according to claim 2, further comprising:

Determine the priority of each CSI according to preset rules;

The feedback of the partial CSI or the RI in the partial CSI to the base station includes:

Give up the feedback of the CSI with the lowest priority or the RI in the CSI with the lowest priority according to the priority of each CSI, until the sum of the CSI that has not been abandoned is less than or equal to the CSI threshold value or the RI that has not been abandoned. The sum is less than or equal to the RI threshold;

Feed back the CSI that has not been abandoned or the RI in the CSI to the base station.

4. The method according to claim 2, further comprising:

Determine the priority of each CSI according to preset rules;

The feedback of the CSI with the highest priority or the RI in the CSI with the highest priority is retained according to the priority of each CSI until the sum of the retained CSI is equal to or is less than the maximum limit of the CSI threshold or the sum of the retained RIs. Equal to or maximally less than the RI threshold; The reserved CSI or the RI in the CSI is fed back to the base station.

5. The method according to claim 3 or 4, characterized in that determining the priority of each CSI according to preset rules includes:

Determine the CSI priority of each CSI process according to the CSI process number;

Or, determine the priority of the CSI of each carrier according to the carrier number;

Or, first determine the CSI priority of each CSI process based on the CSI process number, and then determine the CSI priority of each carrier with the same CSI process number based on the carrier number; or, first determine the CSI priority of each carrier based on the carrier number, Then according to

The CSI process number determines the CSI priority of each CSI process with the same carrier number.

6. The method according to claim 3 or 4, characterized in that determining the priority of each CSI according to preset rules includes: determining the CSI according to the position number of the CSI in the CSI set triggered by the received CSI feedback trigger signaling. priority.

7. The method according to any one of claims 3 to 6, characterized in that the priority of each CSI is determined according to preset rules, including:

The priority of the CSI fed back in the latest CSI aperiodic feedback and/or the priority of the CSI whose RI has not changed in the last two aperiodic reports is determined as the first priority, and the priorities of other CSI are determined. is the second priority, and the first priority is lower than the second priority.

8. The method according to claim 3 or 4, characterized in that determining the priority of each CSI according to preset rules includes: determining the priority of each CSI according to at least one of the following parameters: channel quality indication, channel capacity, UE processing capabilities.

9. The method of claim 8, further comprising:

Feed back identification information of CSI that has not been abandoned or reserved to the base station; and/or

Feedback the identification information of abandoned or unreserved CSI to the base station.

10. The method according to any one of claims 1 to 9, wherein the feedback of the partial CSI or the RI in the partial CSI to the base station includes: setting the total number of bits in the CSI that has not been abandoned or reserved as B RI coding is reported to the base station, and the total number of bits B is less than or equal to the total number of RI information A in the CSI that triggers feedback.

1 1. The method according to claim 10, characterized in that, will not be abandoned or The RI code with a total number of bits B in the reserved CSI is reported to the base station, including:

Use N Reed-Muller RM codes with a base sequence length of 32 to encode and report the RI with a total number of B bits, where N is the smallest integer not less than (B ÷ l l); or, use tail-biting convolution The product code encodes and reports the RI with a total number of B bits;

Or, when the total number of bits B is less than or equal to 22, use N Reed-Muller codes with a base sequence length of 32 to encode the RI with a total number of B bits, where N is the smallest number that is not less than (B ÷ l l) Integer; When the total number of bits B is greater than 22, tail-biting convolutional code is used to encode the RI with a total number of B bits.

12. The method according to claim 11, characterized in that the use of tail-biting convolutional codes to encode and report RIs with a total number of B bits includes:

The number of bits after tail-biting convolutional encoding of the RI is calculated according to the following formula:

(B+number of CRC check bits) ÷ PUSCH coding rate X ^pet , where, the high-level signaling by the base station is notified to the UE;

According to the total number of bits B and the calculated number of encoded bits, a tail-biting convolutional code is used to encode and report the RI with a total number of B bits.

13. The method according to claim 1, wherein the UE feeds back partial CSI or RI in partial CSI to the base station according to the total number C of CSI that triggers feedback or the total number of RI information A in the CSI that triggers feedback. , include:

The UE determines to give up the feedback of part of the CSI or the RI in the part of the CSI based on at least one of the following parameters: channel quality indication, channel capacity, and UE processing capability;

Feedback to the base station the CSI or the RI in the CSI that has not been abandoned, as well as the identification information of the CSI that has not been abandoned and/or the identification information of the abandoned CSI.

14. The method according to claim 9 or 13, characterized in that the identification information of the CSI that has not been abandoned includes: the index and/or number of the CSI that has not been abandoned; the number of the CSI that has not been abandoned. The identification information includes: the index and/or number of the abandoned CSI.

15. The method according to any one of claims 1 to 14, characterized in that: Feedback of partial CSI or RI in partial CSI to the base station includes:

Determine the first CSI in the fed back partial CSI according to at least one of the following parameters: channel quality indication, channel capacity, and UE processing capability;

Setting the CQI in the first CSI to 0 is fed back to the base station.

16. The method according to any one of claims 1 to 15, characterized in that the UE does not perform the corresponding processing according to the total number C of CSI that triggers feedback or the total number of RI information A in the CSI that triggers feedback. CSI feedback triggers CSI aperiodic feedback of signaling, including:

When the total number C of CSI triggering feedback exceeds the CSI limit value or the total number A of RI information in the CSI triggering feedback exceeds the RI limit value, CSI aperiodic feedback corresponding to the CSI feedback trigger signaling is not performed.

17. The method according to any one of claims 1 to 16, characterized in that the CSI is the CSI corresponding to the CSI process in the carrier.

18. A user equipment UE, characterized in that it includes:

Determining unit, configured to determine the total number C of CSI triggering feedback or the total number A of RI information in the CSI triggering feedback according to the received CSI feedback triggering signaling;

The feedback processing unit is configured to feed back the partial CSI or the RI in the partial CSI to the base station according to the total number C of CSI that triggers feedback or the total number of RI information A in the CSI that triggers feedback determined by the determining unit, or, does not perform the corresponding processing. The CSI feedback triggers CSI aperiodic feedback of signaling.

19. The UE according to claim 18, wherein the feedback processing unit is specifically configured to operate when the total number C of CSI triggering feedback is greater than a CSI threshold value or the total number of RI information in the CSI triggering feedback. When A is greater than the RI threshold, the partial CSI or the RI in the partial CSI is fed back to the base station, so that the sum of the fed back CSI is less than or equal to the CSI threshold or the sum of the fed back RI is less than or equal to the RI threshold. .

20. The UE according to claim 19, wherein the feedback processing unit includes: a determination subunit, a processing subunit and a feedback subunit;

The determination subunit is used to determine the priority of each CSI according to preset rules; the processing subunit is used to determine the priority of each CSI according to the determination subunit. The priority is to give up the feedback of the CSI with the lowest priority or the RI in the CSI with the lowest priority until the sum of the CSI that has not been abandoned is less than or equal to the CSI threshold value or the sum of the RI that has not been abandoned is less than or equal to the Said RI threshold value;

The feedback subunit is configured to feed back the unabandoned CSI or the RI in the CSI to the base station according to the partial CSI or the RI in the CSI that is abandoned by the processing subunit.

21. The UE according to claim 19, wherein the feedback processing unit includes: a determination subunit, a processing subunit and a feedback subunit;

The determination subunit is used to determine the priority of each CSI according to preset rules; the processing subunit is used to retain the highest priority CSI or priority among the priorities of each CSI determined according to the determination subunit. Feedback of the RI in the highest CSI until the sum of retained CSI is equal to or maximally smaller than the CSI threshold value or the sum of retained RIs is equal to or maximally smaller than the RI threshold value;

The feedback subunit is configured to feed back to the base station the CSI retained by the processing subunit or the RI in the CSI.

22. The UE according to claim 20 or 21, characterized in that the determining subunit is specifically used to:

23. The UE according to claim 20 or 21, wherein the determination subunit is specifically configured to determine the priority of the CSI according to the position number of the CSI in the CSI set triggered by the received CSI feedback trigger signaling.

24. The UE according to any one of claims 20 to 23, wherein the determining subunit is specifically configured to: determine the priority of the CSI fed back in the most recent CSI aperiodic feedback and/or determine the priority of the two most recent CSI aperiodic feedbacks. The priority of the CSI whose RI has not changed in aperiodic reporting is determined as the first priority, and the priority of other CSI is determined as the second priority. level, the first priority level is lower than the second priority level.

25. The UE according to claim 20 or 21, wherein the determination subunit is specifically configured to: determine the priority of each CSI according to at least one of the following parameters: channel quality indication, channel capacity, and UE processing capability.

26. The UE according to claim 25, wherein the feedback subunit is further configured to feed back to the base station identification information of the CSI that has not been abandoned or reserved; and/or feed back to the base station the identification information of the CSI that has not been abandoned or reserved. CSI identification information.

27. The UE according to any one of claims 18 to 26, wherein the feedback processing unit used to feed back the partial CSI or the RI in the partial CSI to the base station includes: changing the RI in the CSI that has not been abandoned or reserved. RI codes with a total number of bits B are reported to the base station, and the total number of bits B is less than or equal to the total number of RI information A in the CSI that triggers feedback.

28. The UE according to claim 27, wherein the feedback processing unit reports an RI code with a total number of bits B in the CSI that has not been abandoned or reserved to the base station, including:

29. The UE according to claim 28, wherein the tail-biting convolutional code is used to encode and report the RI with a total number of B bits, including:

Based on the total number of bits B and the calculated number of encoded bits, tail biting is used The convolutional code encodes and reports the RI with a total number of B bits.

30. The UE according to claim 18, wherein the feedback processing unit feeds back part of the CSI or the RI in the part of the CSI to the base station according to the total number C of CSI that triggers feedback or the total number A of RI information in the CSI that triggers feedback. , include:

Determine to give up feedback on partial CSI or RI in partial CSI based on at least one of the following parameters: channel quality indication, channel capacity, and UE processing capability;

Feedback to the base station the RI in the CSI or part of the CSI that has not been abandoned, as well as the identification information of the CSI that has not been abandoned and/or the identification information of the abandoned CSI.

3 1. The UE according to claim 26 or 30, characterized in that the identification information of the CSI that has not been abandoned or reserved includes: the index and/or number of the CSI that has not been abandoned or reserved;

The identification information of the abandoned or unreserved CSI includes: the index and/or number of the abandoned or unreserved CSI.

32. The UE according to any one of claims 18 to 31, wherein the feedback processing unit is used to feed back partial CSI or RI in partial CSI to the base station, including: according to at least one of the following parameters: Channel quality indication, channel capacity, and UE processing capability, determine the first CSI in the fed-back partial CSI; set the CQI in the first CSI to 0 and feed it back to the base station.

33. The UE according to any one of claims 18 to 32, wherein the feedback processing unit is further configured to perform the feedback processing when the total number C of the CSI triggering feedback exceeds the CSI limit value or the CSI triggering feedback When the total number of RI information A in exceeds the RI limit value, CSI aperiodic feedback corresponding to the CSI feedback triggering signaling is not performed.

34. The UE according to any one of claims 18 to 33, wherein the CSI is the CSI corresponding to the CSI process in the carrier.

35. A user equipment UE, characterized in that it includes: a receiver, a transmitter, a memory and a processor connected to the receiver, the transmitter and the memory respectively, the memory stores a set of program codes, the processing The program code in the memory is called by the processor to perform the operation described in any one of claims 1 to 17.

36. A method for processing channel state information CSI aperiodic feedback, characterized by: include:

The base station sends CSI feedback trigger signaling to the user equipment UE, and the total number C of CSI triggered by the CSI feedback trigger signaling does not exceed the CSI threshold value or the total number A of RI information in the CSI that triggers feedback does not exceed the RI threshold value; with The UE is caused to perform CSI aperiodic feedback corresponding to the CSI feedback triggering signaling.

37. The method according to claim 36, characterized in that,

The CSI threshold value and the RI threshold value are bit threshold values.

38. The method according to claim 36 or 37, characterized in that,

The CSI threshold value and the RI threshold value are positive integers predefined by the base station or positive integers sent by the UE to the base station.

39. The method according to any one of claims 36 to 38, characterized in that the CSI is the CSI corresponding to the CSI process in the carrier.

40. A base station, characterized by including:

A processing unit, used to generate CSI feedback trigger signaling;

A transmitting unit, configured to send the CSI feedback trigger signaling generated by the processing unit to the user equipment UE, where the total number C of CSI triggered by the CSI feedback trigger signaling does not exceed the CSI threshold value or the RI information in the CSI that triggers feedback The total number A does not exceed the RI threshold;

41. The base station according to claim 40, characterized in that,

The CSI threshold value and the RI threshold value are bit threshold values.

42. The base station according to claim 40 or 41, characterized in that,

43. The base station according to any one of claims 40 to 42, characterized in that the CSI is the CSI corresponding to the CSI process in the carrier.

44. A base station, characterized in that it includes: a receiver, a transmitter, a memory, and a processor connected to the receiver, the transmitter and the memory respectively. The memory stores a set of program codes, and the processor calls The program code in the memory is used to perform the operations described in any one of claims 36 to 39.