WO2011140982A1

WO2011140982A1 - Method, user equipment and base station for feeding back and obtaining channel state information of a plurality of component carriers

Info

Publication number: WO2011140982A1
Application number: PCT/CN2011/073945
Authority: WO
Inventors: 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2010-08-12
Filing date: 2011-05-11
Publication date: 2011-11-17
Also published as: CN102377539A; CN102377539B

Abstract

A method, User Equipment(UE) and base station for feeding back and obtaining the Channel State Information(CSI) of a plurality of Component Carriers(CCs) are provided in the present invention. The method comprises the following steps: obtaining the periodic CSI to be transmitted, wherein the periodic CSI to be transmitted including the periodic CSI corresponding to at least two CCs; feeding back the periodic CSI to be transmitted to the base station, wherein transmitting at least one part of the periodic CSI to be transmitted on a Physical Uplink Shared Channel(PUSCH). In the embodiments of the present invention, all the periodic CSI to be transmitted could be fed back to the base station.

Description

Method for feeding back and acquiring CSI of multiple CCs, UE and base station

This application is submitted to the Chinese Patent Office on August 12, 2010, and the application number is

201010253564.8, the entire disclosure of which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the the the the the the the

Technical field

The present invention relates to communication technologies, and in particular, to a method, a UE, and a base station for feeding back and acquiring CSI of multiple CCs.

Background technique

The Long Term Evolution (LTE) technology is an evolution of the third generation mobile communication system ( ^3Rf Generation, 3G), which improves and enhances the 3G air access technology and can improve the data transmission rate. Long Term Evolution Advanced (LTE-A) is a further enhancement of LTE, which has higher bandwidth requirements than LTE systems to support higher peak rates. Carrier Aggregation (CA) technology can be applied to LTE-A systems to expand bandwidth. The main idea of CA technology is to aggregate multiple component carriers (CCs) into one carrier with higher bandwidth. For example, it can be aggregated into a carrier with a bandwidth of 100M by 5 CCs (each with a bandwidth of 20 MHz). . A plurality of CCs in a CA scenario may be divided into a primary component carrier (PCC) and at least one secondary component carrier (SCC), where the physical uplink control channel (PUCCH) It is only carried on the PCC, and the Physical Uplink Shared Channel (PUSCH) can be carried on the PCC or SCC.

In the LTE system and the LTE-A system, the user equipment (User Equipment, UE) needs to be based on The evolved NodeB (eNB) feeds back channel state information (CSI), and the eNB can determine the modulation and coding scheme (MCS) used in the downlink according to the CSI fed back by the UE. The CSI includes Channel Quality Information (CQI), Precoding Matrix Indication (PMI), and Rank Indication (RI). The reporting of the CSI includes triggered reporting and periodic reporting. The triggered reporting is mainly reported on the PUSCH.

Currently, the periodic CSI report is mainly carried on the PUCCH in the LTE system. Since only the CSI of one carrier needs to be fed back in the LTE system, the CSI of the carrier can be fed back on the PUCCH. However, in the CA scenario of the LTE-A system, the CSI of multiple CCs needs to be fed back, and the capacity of the PUCCH is limited. Therefore, the CSI of all CCs cannot be fed back. In the prior art, the CSI of the CC with the highest priority is fed back on the PUCCH, and the CSI of other CCs is discarded.

In the process of implementing the present invention, the inventors have found that at least the following problems exist in the prior art: Discarding the CSI of a part of CC affects the accuracy of the reported CSI. Summary of the invention

The embodiments of the present invention provide a method, a UE, and a base station for feeding back and acquiring CSIs of multiple CCs, so as to implement CSI for multiple CCs.

In one aspect, the embodiment of the present invention provides a method for feeding back CSI of multiple CCs, including: acquiring periodic CSI that needs to be transmitted, and the periodic CSI that needs to be transmitted includes a period CSI corresponding to at least two CCs;

And feeding back the periodic CSI that needs to be transmitted to the base station, where the feedback process includes: feeding back at least a part of the periodic CSI that needs to be transmitted to the base station on a physical uplink shared channel PUSCH. On the other hand, an embodiment of the present invention provides a method for acquiring CSIs of multiple CCs, including: receiving a periodic CSI that needs to be transmitted by a user equipment UE, where the receiving process includes: receiving on a physical uplink shared channel PUSCH At least a part of the periodic CSI that the UE needs to transmit, the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs. In an aspect, the embodiment of the present invention provides a UE, including: an acquiring module, configured to acquire periodic channel state information CSI to be transmitted, where the periodic CSI to be transmitted includes at least two periodic CSIs corresponding to a component carrier CC; The module is configured to feed back the periodic CSI that needs to be transmitted to the base station, where the feedback module includes: a feedback unit, configured to feed back at least a part of the periodic CSI that needs to be transmitted to the base station on a physical uplink shared channel PUSCH. On the other hand, an embodiment of the present invention provides a base station, including: a receiving module, configured to receive periodic channel state information that needs to be transmitted by a user equipment UE.

The CSI, the receiving module includes: a receiving unit, configured to receive, on a physical uplink shared channel PUSCH, at least a part of a periodic CSI that is required to be transmitted by the UE, where the periodic CSI to be transmitted includes a periodic CSI corresponding to at least two CCs .

According to the foregoing technical solution, the embodiment of the present invention feeds back all the periodic CSIs corresponding to multiple CCs to the base station, so as to avoid the problem of insufficient accuracy caused by discarding the CSI of some CCs, so as to improve the accuracy of the CSI feedback.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the following description will be described. The drawings in the drawings are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor. 1 is a schematic flowchart of a method according to a first embodiment of the present invention; FIG. 2 is a schematic flowchart of a method according to a second embodiment of the present invention; FIG. 3 is a schematic flowchart of a method according to a third embodiment of the present invention; Figure 5 is a schematic flowchart of a method according to a fifth embodiment of the present invention; Figure 6 is a schematic flowchart of a method according to a sixth embodiment of the present invention; and Figure 7 is a schematic structural diagram of a UE according to a seventh embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a base station according to an eighth 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 of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. FIG. 1 is a schematic flowchart of a method according to a first embodiment of the present invention, including: Step 11: A UE acquires a periodic CSI that needs to be transmitted, and the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs. The embodiment of the present invention may be directed to the periodic feedback mode of the CSI in the LTE-A CA scenario. Therefore, the acquired CSI is a periodic CSI, and the corresponding CC includes at least two. Periodic CSI may include subband CQI, wideband CQI and wideband PMI, RI and wideband CQI, based on The feedback parameters sent by the station can determine the feedback moments corresponding to different contents. In a scenario of multiple CCs, the CSI corresponding to multiple CCs may be fed back to the same feedback moment. For example, at the same feedback moment, the sub-band CQI of CC-1 needs to be fed back, and the broadband CQI of CC-2 needs to be fed back. At this time, the CSI that needs to be fed back at the same feedback moment is the period CSI that needs to be transmitted.

Step 12: The UE feeds back the periodic CSI to be transmitted to the base station, and the feedback process includes: feeding back at least a part of the periodic CSI to be transmitted to the base station on one PUSCH.

The UE may perform the foregoing feedback according to the correspondence between the periodic CSI and the channel resources acquired in advance. The correspondence between the periodic CSI and the channel resource may be configuration information that the base station sends to the UE in advance to indicate that the UE feeds back the periodic CSI on the corresponding channel resource. For example, the PUSCH resource may pass the physical layer uplink scheduling grant (UL grant). It is indicated that the PUCCH resource may be indicated by a parameter I _C QI/PMI carried by the RRC layer signaling.

The PUCCH currently used for transmitting CSI is PUCCH format 2, and the capacity of the PUCCH format 2 is 11 bits. In the single carrier case of the LTE system, the wideband CQI and the wideband PMI in the feedback period CSI need to occupy the most bits, which is 11 bits. Therefore, for a single carrier case of the LTE system, the periodic CSI can be transmitted on the PUCCH.

However, in the CA scenario of the LTE-A system, the periodic CSI that needs to be transmitted corresponds to multiple CCs, and the total amount of periodic CSIs that need to be transmitted is likely to exceed the capacity of the PUCCH (specifically PUCCH format 2), even in LTE. In the case where the capacity of the PUCCH in the -A system may be extended (for example, extended to 13 bits), the total amount of periodic CSIs that need to be transmitted may also exceed the capacity of the extended PUCCH. For example, in the scenario where two carriers are aggregated, both CC-1 and CC-2 need to feed back the wideband CQI and the wideband PMI. For example, the number of bits required by the current LTE system is 22 bits, which exceeds the PUCCH. The capacity of the bit. For this reason, only the PUCCH transmission period CS is used, and there may be insufficient resources. When the PUCCH resources are sufficient, all CSIs that need to be transmitted can be transmitted on the PUCCH. In the case that the PUCCH resources are insufficient and the CC is not discarded, since the capacity of the PUSCH is large, the PUSCH may be used to carry all the periodic CSIs that need to be transmitted, and the PUCCH and the PUSCH may jointly carry all the periodic CSIs that need to be transmitted (of course, When the PUCCH and the PUSCH jointly carry the CSI, the system configuration is required to support the PUCCH and the PUSCH simultaneous transmission. The part carried on the PUCCH may be determined according to the priority and the capacity of the PUCCH, or according to the order of the CC to which the periodic CSI belongs.

That is, the at least part of the periodic CSI that needs to be transmitted is fed back to the base station on a PUSCH, including: feeding back the periodic CSI that needs to be transmitted to the base station on one PUSCH; or

A part of the periodic CSI that needs to be transmitted is fed back to the base station on the physical uplink control channel PUCCH, and another part of the periodic CSI that needs to be transmitted is fed back to the base station on one PUSCH.

Further, a period CSI that is required to be transmitted on the PUCCH is a period CSI corresponding to one of the at least two CCs, and another part of the feedback on one PUSCH needs to be transmitted.

Wherein the order of one of the at least two CCs is higher than the other of the at least two CCs

The ranking is determined according to at least one of the following: The frequency at which the CC is located, the number of the CC, the priority of the CC, and the content carried by the CC. or,

The periodic CSI that needs to be transmitted on the PUCCH includes a periodic CSI of a first type, and the periodic CSI that needs to be transmitted by another part of the feedback on the one PUSCH includes a periodic CSI of the second type; The priority of the periodic CSI of the category is higher than the periodic CSI of the second category; the priority is determined according to at least one of the following items: The priority of the rank indication RI is higher than the channel quality information CQI and the channel quality information PMI Priority; the priority of the wideband CSI is higher than the priority of the sub-band CSI; the priority of the original information is higher than the priority of the differential information; the priority of the first codeword CSI is higher in the multi-input and multi-output MIMO scenarios than the other The priority of the CSI of the codeword; the priority of the CSI with a long period in the same type of information is higher than the priority of the CSI with a short period; the priority of the information reported in the first round is higher than the priority of the subsequently reported information.

In this embodiment, the CSI that needs to be transmitted is fed back to the base station, so as to avoid the problem of insufficient accuracy caused by discarding the CSI of some CCs, so as to improve the accuracy of the CSI. In this embodiment, various types of CSIs of multiple CCs are carried on the same PUSCH, and the CSI can be successfully fed back from the terminal to the base station without damaging the single carrier characteristics. Since the PUSCH is used for transmitting uplink data by the terminal, its capacity is large, and the amount of CSI that can be carried is large, so that the occurrence of CSI discarding can be alleviated.

2 is a schematic flowchart of a method according to a second embodiment of the present invention, including: Step 21: The base station receives the periodic CSI that needs to be transmitted by the UE, and the receiving process includes: receiving, on one PUSCH, at least a part of a periodic CSI that needs to be transmitted by the UE, where the periodic CSI that needs to be transmitted includes at least two CCs. Cycle CSI.

The receiving, by the UE, the at least one part of the periodic CSI that is required to be transmitted by the UE on the PUSCH, includes: receiving the periodic CSI that needs to be transmitted on one PUSCH; or

A periodic CSI that needs to be transmitted is received on the physical uplink control channel PUCCH, and another period of CSI to be transmitted is received on one PUSCH. Further, the period CSI that is required to be transmitted on the PUCCH is a period CSI corresponding to one of the at least two CCs, and the other part received on one PUSCH needs to be transmitted.

Or,

The period of the part of the PUCCH that needs to be transmitted, the CSI, includes the period of the first type.

CSI, the period of the other part of the PUSCH received on the PUSCH to be transmitted CSI includes the periodic CSI of the second type.

The base station may acquire the periodic CSI according to the corresponding relationship between the configured periodic CSI and the channel resource. For example, the corresponding relationship of the configuration is that the RI is transmitted on the PUCCH, and the CQI is transmitted on the PUSCH, the base station acquires the RI from the PUCCH, and acquires the CQI on the PUSCH. And according to the cycle CSI content and CC correspondence For example, the base station learns to feed back the RI in the subframe CC-1 according to the period and offset indicated by the parameter I _CQI/PMI and the reporting mode of each CC, and CC-2 feeds back the CQI to obtain the periodic CSI corresponding to each CC, as obtained. RI of CC-1 and CQI of CC-2. The base station sends a feedback parameter ICQ!/PM and a reporting mode to the UE to indicate when the UE feeds back the content of the periodic CSI.

Further, the method may include: after receiving the periodic CSI that needs to be transmitted, processing the periodic CSI that needs to be transmitted. For the process of the process, refer to the prior art, to obtain the processing result, and to achieve the purpose of determining the channel state or the channel quality, which is not described in this embodiment.

In this embodiment, by receiving all the periodic CSIs that need to be transmitted by the UE, the problem of insufficient accuracy caused by discarding the CSI of some CCs is avoided, so as to improve the accuracy of the CSI feedback.

FIG. 3 is a schematic flowchart of a method according to a third embodiment of the present invention. In this embodiment, a channel resource corresponding to a CSI to be transmitted is allocated according to a capacity of a PUCCH, and a period CSI is transmitted by a PUSCH when a capacity is exceeded.

Referring to FIG. 3, this embodiment includes:

Step 31: Base station configuration period Correspondence between CSI and channel resources.

Specifically, the correspondence may be:

Case 1: When the total amount of periodic CSIs that need to be transmitted is less than or equal to the capacity of the PUCCH format (such as PUCCH format 2) for transmitting CSI, all the periodic CSIs that need to be transmitted are combined into one PUCCH format 2, and transmitted on the PUCCH. .

Case 2: When the total amount of periodic CSIs that need to be transmitted is greater than the capacity of the PUCCH format for transmitting CSI, all periodic CSIs that need to be transmitted are transmitted on the PUSCH, and further, all CSIs that need to be transmitted are on the same PUSCH. Transfer on.

Step 32: The base station sends the correspondence between the periodic CSI and the channel resource to the UE. Step 33: When the feedback period CSI is required, the UE determines whether the total amount of periodic CSIs to be transmitted is less than or equal to the capacity of the PUCCH format for transmitting CSI. If yes, go to step 34; otherwise, go to step 35.

Step 34: The UE feeds back all the periodic CSIs that need to be transmitted to the base station on the PUCCH. Step 35: The UE sends all the periodic CSIs that need to be transmitted to the same PUSCH and feeds back to the base station.

In this embodiment, when the capacity of the PUCCH is insufficient, all the CSIs that need to be transmitted are transmitted on the PUSCH, and all the CSIs that need to be transmitted can be fed back to the base station without being discarded, so as to avoid the accuracy caused by discarding the CSI of some CCs. The problem to improve the accuracy of CSI feedback.

FIG. 4 is a schematic flowchart of a method according to a fourth embodiment of the present invention. In this embodiment, a channel resource corresponding to a CSI to be transmitted is allocated according to a capacity of a PUCCH, and a period CSI is transmitted by a PUSCH and a PUCCH when a capacity is exceeded.

Referring to FIG. 4, this embodiment includes:

Step 41: The base station configuration period Correspondence between CSI and channel resources.

Specifically, the correspondence may be:

Case 2: When the total amount of periodic CSIs that need to be transmitted is greater than the capacity of the format of the PUCCH used for transmitting CSI, the periodic CSI that needs to be transmitted is transmitted on the PUCCH, and the other part of the periodic CSI that needs to be transmitted is on the same PUSCH. Transfer on.

The period CSI that needs to be transmitted on the PUCCH is determined by the following method. The periodic CSIs that need to be transmitted are loaded onto the PUCCH in order of priority from high to low until the capacity of the PUCCH format for transmitting CSI is reached. The CSI is guaranteed to be transmitted on the PUCCH to ensure high priority. In specific implementation, the five types of CSIs may be prioritized and represented by CSI1, CSI2, CSI3, CSI4, and CSI5, respectively, and their priorities are sequentially decreased. The CSI1 may be carried on the PUCCH and the CSI2 to CSI5 may be carried on the PUSCH, or the CSI1 to CSI4 may be carried on the PUCCH and the CSI5 itself may be carried on the PUSCH. How the CSIs of different priorities are allocated on the two channels can be divided according to the CSI amount and the channel capacity. For example, when the amount of CSI1 and CSI2 exceeds the PUCCH capacity, the CSI1 itself is placed on the PUCCH; when the amount of CSI1 to CSI4 can be carried on the PUCCH, only the CSI5 itself can be carried on the PUSCH, this embodiment Not limited.

The priority of the periodic CSI may be determined by at least one of the following:

The priority of the RI is higher than the priority of the CQI and the PMI, the priority of the wideband CSI is higher than the priority of the sub-band CSI, and the original information (that is, the information as a differential reference when the information on the difference) is prioritized higher than the differential information. Priority, the priority of the first codeword CSI in the MIMO scenario is higher than the priority of the CSI of the other codewords, and the priority of the CSI with the long period in the same type information is higher than the priority of the short CSI, the first round The priority of the reported information is higher than the priority of the subsequently reported information.

Step 42: The base station sends the correspondence between the periodic CSI and the channel resource to the UE.

Step 43: When the CSI is required to be fed back, the UE determines whether the total number of periodic CSIs to be transmitted is less than or equal to the capacity of the PUCCH format for transmitting CSI. If yes, go to step 44. Otherwise, go to step 45.

Step 44: The UE feeds back all the periodic CSIs that need to be transmitted on the PUCCH to the base station. Step 45: In the periodic CSI that the UE needs to transmit, the part with high priority and satisfying the PUCCH capacity requirement is fed back to the base station on the PUCCH, and the other part is fed back to the base station on the same PUSCH. For example, at the same feedback moment, the periodic CSI that needs to be transmitted includes the RI of CC-1 and the CQI of CC-2, and if the feedback exceeds the capacity of the PUCCH, the UE feeds back the RI of CC-1 on the PUCCH, and The CQI of CC-2 is fed back on the PUSCH.

In this embodiment, when the capacity of the PUCCH is insufficient, the CSI with a high priority is transmitted on the PUSCH, and the remaining CSIs are transmitted on the PUSCH, and all the CSIs that need to be transmitted are fed back to the base station without being discarded. Abandoning the CSI of some CCs causes insufficient accuracy to improve the accuracy of CSI feedback.

FIG. 5 is a schematic flowchart of a method according to a fifth embodiment of the present invention. In this embodiment, a channel resource corresponding to a CSI to be transmitted is divided according to the number of CCs, and a period CSI is transmitted by a PUSCH when the number of CCs is greater than one.

Referring to FIG. 5, this embodiment includes:

Step 51: The base station configuration period Correspondence between CSI and channel resources.

Specifically, the correspondence may be:

In the first case, when the number of CCs corresponding to the period CSI that needs to be transmitted is one, all the periodic CSIs that need to be transmitted are combined into one PUCCH format 2, and transmitted on the PUCCH.

Case 2: When the number of CCs corresponding to the period CSI that needs to be transmitted is greater than or equal to two, all periodic CSIs that need to be transmitted are transmitted on the PUSCH, and further, all CSIs that need to be transmitted are transmitted on the same PUSCH.

Step 52: The base station sends the correspondence between the periodic CSI and the channel resource to the UE.

Step 53: When the feedback period CSI is required, the UE determines whether the number of CCs corresponding to the period CSI to be transmitted is one. If yes, go to step 54, otherwise, go to step 55.

Step 54: The UE feeds back all the periodic CSIs that need to be transmitted on the PUCCH to the base station. Step 55: The UE feeds back all the periodic CSIs that need to be transmitted on the same PUSCH to the base station.

In this embodiment, when the number of CCs is greater than one, all the CSIs that need to be transmitted are transmitted on the PUSCH, and all the CSIs that need to be transmitted are fed back to the base station without being discarded, thereby avoiding discarding the CSI of some CCs. The problem of insufficient precision is to improve the accuracy of CSI feedback.

FIG. 6 is a schematic flowchart of a method according to a sixth embodiment of the present invention. In this embodiment, a channel resource corresponding to a CSI to be transmitted is divided according to the number of CCs, and a PUSCH and PUCCH transmission period is used when the number of CCs is greater than one. CSI. Referring to Figure 6, this embodiment includes:

Step 61: The base station configuration period Correspondence between CSI and channel resources.

Specifically, the correspondence may be:

In the second case, when the number of CCs corresponding to the periodic CSI that needs to be transmitted is greater than or equal to two, the periodic CSI corresponding to one CC is transmitted on the PUCCH, and the periodic CSI corresponding to the other CCs needs to be transmitted in the same Transfer on PUSCH.

The period CSI corresponding to a CC transmitted on the PUCCH is determined in the following manner: The period CSI corresponding to the highest ranked one CC is transmitted on the PUCCH.

CC sorting can be determined using at least one of the following:

The frequency at which the CC is located (from low frequency to high frequency or high frequency to low frequency), the number of CC (Carrier Indicator Field (CIF) values from small to large or large to small), CC The priority (such as the PCC is ranked higher than the SCC), the content carried by the CC (such as the order of the CC carrying the UL grant is higher than other CCs). Step 62: The base station sends the correspondence between the periodic CSI and the channel resource to the UE.

Step 63: When the CSI is required to be fed back, the UE determines whether the number of CCs corresponding to the period CSI to be transmitted is one. If yes, go to step 64. Otherwise, go to step 65.

Step 64: The UE sends back all the periodic CSIs that need to be transmitted to the base station on the PUCCH. Step 65: The period in which the UE will need to transmit CSI, the period corresponding to the highest ranked CC CSI is

The PUCCH feeds back to the base station, and the periodic CSI corresponding to other CCs is fed back to the base station on the same PUSCH.

For example, at the same feedback moment, the periodic CSI to be transmitted includes the periodic CSI of CC-1, CC-2, CC-3, and the highest order of CC-1, the UE feeds back the periodic CSI of CC-1 on the PUCCH, and The periodic CSI of CC-2 and the periodic CSI of CC-3 are fed back on the PUSCH.

In this embodiment, when the number of CCs is greater than 1, the CSI corresponding to the highest ranked CC is transmitted on the PUSCH, and the remaining CSIs are transmitted on the PUSCH, and all CSIs that need to be transmitted can be fed back to the base station without being discarded. Avoid the problem of insufficient accuracy caused by discarding the CSI of some CCs to improve the accuracy of CSI feedback. FIG. 7 is a schematic structural diagram of a UE according to a seventh embodiment of the present invention, including an acquiring module 71 and a feedback module.

The obtaining module 71 is configured to obtain a periodic CSI that needs to be transmitted, and the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs. The feedback module 72 is configured to feed back the periodic CSI that needs to be transmitted to the base station, where The feedback module 72 includes: a feedback unit 721, configured to feed back at least a part of the periodic CSI that needs to be transmitted to the base station on one PUSCH. The acquisition module 71 can be an interface and the feedback module 72 can be a processor. The feedback unit 721 may be specifically configured to:: the periodic CSI required to be transmitted in one The PUSCH is fed back to the base station; or, a part of the periodic CSI to be transmitted is fed back to the base station on the physical uplink control channel PUCCH, and another part of the periodic CSI to be transmitted is fed back to the base station on one PUSCH. Further, a periodic CSI that is required to be transmitted by the feedback unit 721 on the PUCCH is a periodic CSI corresponding to one of the at least two CCs, and another part of the feedback unit 721 that is fed back on one PUSCH needs to be transmitted. The periodic CSI is the periodic CSI corresponding to the other CCs of the at least two CCs; or the period CSI that the feedback unit 721 feeds back on the PUCCH needs to include the first type of periodic CSI, and the feedback unit 721 The period CSI that needs to be transmitted by another part of the feedback on one PUSCH includes the periodic CSI of the second kind.

In this embodiment, the CSI feedback accuracy is improved by feeding back all the CSIs that need to be transmitted to the base station, and avoiding the problem of insufficient accuracy caused by discarding the CSI of some CCs. FIG. 8 is a schematic structural diagram of a base station according to an eighth embodiment of the present invention, including a receiving module 81. The receiving module 81 is configured to receive all periodic CSIs that need to be transmitted by the UE, and the receiving module 81 includes a receiving unit 811, configured to be in a PUSCH. And receiving at least a part of a periodic CSI that is required to be transmitted by the UE, where the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs. The receiving module can be a processor, and the receiving unit 811 can be a processing unit located inside the processor. The base station further includes processing a result of processing the periodic CSI that needs to be transmitted. The receiving unit 811 may be specifically configured to receive the periodic CSI that needs to be transmitted on one PUSCH; or receive a periodic CSI that needs to be transmitted on the PUCCH, and receive another periodic CSI that needs to be transmitted on one PUSCH. The period CSI that the receiving unit 811 receives on the PUCCH needs to be transmitted is the The periodic CSI corresponding to one of the two CCs is received by the receiving unit 811 on one PUSCH

CSI; or, the period CSI that the receiving unit 811 receives on the PUCCH needs to transmit a periodic CSI of the first type, and the period CSI that the receiving unit 811 receives on another PUSCH needs to be transmitted includes the second category. Cycle CSI. The UE may include, but is not limited to, various types of terminal devices such as a mobile phone and a portable computer. In this embodiment, by configuring the corresponding channel resources for all the CSIs that need to be transmitted, all the CSIs that need to be transmitted can be fed back to the base station on the corresponding channel resources, so as to avoid the problem of insufficient accuracy caused by discarding the CSI of some CCs, so as to improve CSI. The accuracy of the feedback. It can be understood that related features in the above methods and devices can be referred to each other. Further, "first", "second" and the like in the above embodiments are used to distinguish the embodiments, and do not represent the advantages and disadvantages of the respective embodiments. It can be understood by those skilled in the art that all or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes The foregoing steps of the method embodiment; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. The modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

Rights request

A method for feeding back a plurality of channel state information CSIs constituting a carrier CC, the method comprising: acquiring a periodic CSI to be transmitted, wherein the periodic CSI to be transmitted includes a periodic CSI corresponding to at least two CCs; The periodic CSI that needs to be transmitted is fed back to the base station, and the feedback process includes: feeding back at least a part of the periodic CSI that needs to be transmitted to the base station on a physical uplink shared channel PUSCH.

The method according to claim 1, wherein the feeding back at least a part of the periodic CSI to be transmitted to the base station on one PUSCH comprises: feeding back the periodic CSI that needs to be transmitted on one PUSCH Or to the base station; or, a part of the periodic CSI to be transmitted is fed back to the base station on the physical uplink control channel PUCCH, and another part of the periodic CSI to be transmitted is fed back to the base station on one PUSCH.

The method according to claim 2, wherein a part of the feedback CSI that needs to be transmitted on the PUCCH is a periodic CSI corresponding to one of the at least two CCs, where the PUSCH is on one PUSCH. Another part of the feedback needs to be transmitted

Or the period CSI that needs to be transmitted on the PUCCH includes a period of the first category. CSI, the period CSI that needs to be transmitted by another part of the feedback on one PUSCH includes the periodic CSI of the second category.

The method according to claim 3, wherein the priority of the first type of periodic CSI is higher than the periodic CSI of the second category; the priority is determined according to at least one of the following items: : the priority of the rank indication RI is higher than the priority of the channel quality information CQI and the channel quality information PMI; the priority of the wideband CSI is higher than the priority of the subband CSI; the priority of the original information is higher than the priority of the differential information; The priority of the first codeword CSI in the MIMO scenario is higher than the priority of the CSI of other codewords; in the same type information, the priority of the CSI with a long period is higher than the priority of the CSI with a short period; The priority of the information reported in one round is higher than the priority of the information reported subsequently.

The method according to claim 3, wherein a ranking of one of the at least two CCs is higher than other ones of the at least two CCs; the ranking is according to at least one of the following: Item determination:

The frequency at which the CC is located, the number of the CC, the priority of the CC, and the content carried by the CC.

The method according to any one of claims 1 to 5, wherein the feeding back at least a part of the periodic CSI required to be transmitted to the base station on one PUSCH comprises: When the total amount of periodic CSIs to be transmitted is greater than the capacity of the PUCCH format for transmitting CSI, at least a part of the periodic CSIs that need to be transmitted are fed back to the base station on one PUSCH.

A method for acquiring a plurality of channel state information (CSI) of a component carrier CC, comprising: receiving a periodic CSI that needs to be transmitted by a user equipment UE, where the receiving process includes: on a physical uplink shared channel PUSCH And receiving at least a part of a periodic CSI that is required to be transmitted by the UE, where the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs.

The method according to claim 7, wherein the receiving, by the UE, the at least one part of the periodic CSI that is required to be transmitted by the UE, is: receiving the periodic CSI that needs to be transmitted on one PUSCH; or A periodic CSI that needs to be transmitted is received on the physical uplink control channel PUCCH, and another part of the periodic CSI to be transmitted is received on one PUSCH.

The method according to claim 8, wherein the part of the periodic CSI required to be transmitted on the PUCCH is a periodic CSI corresponding to one of the at least two CCs, where the PUSCH is on a PUSCH. Another part of the reception needs to be transmitted

Or the period CSI that is received on the PUCCH and needs to be transmitted includes a period of the first category. CSI, the other part of the periodic CSI that needs to be transmitted received on one PUSCH includes a periodic CSI of the second kind.

A user equipment (UE), comprising: an acquiring module, configured to acquire periodic channel state information CSI to be transmitted, where the periodic CSI to be transmitted includes at least two periodic CSIs corresponding to a component carrier CC; The feedback module is configured to feed back the periodic CSI that needs to be transmitted to the base station, where the feedback module includes: a feedback unit, configured to feed back at least a part of the periodic CSI that needs to be transmitted to the base station on a physical uplink shared channel PUSCH.

The UE according to claim 10, wherein the feedback unit is specifically configured to: feed back, to the base station, the periodic CSI that needs to be transmitted on a PUSCH; or: The uplink control channel PUCCH is fed back to the base station, and another part of the periodic CSI that needs to be transmitted is fed back to the base station on one PUSCH.

The UE according to claim 11, wherein a periodic CSI that is required to be transmitted by the feedback unit on the PUCCH is a periodic CSI corresponding to one of the at least two CCs, the feedback unit Feedback on one PUSCH

Or the period CSI that the feedback unit needs to transmit on the PUCCH includes the first type. The periodic CSI of the class, the period CSI of the other part of the feedback unit that is fed back on one PUSCH needs to be transmitted, and the periodic CSI of the second type.

A base station, comprising: a receiving module, configured to receive periodic channel state information CSI that needs to be transmitted by a user equipment UE, where the receiving module includes: a receiving unit, configured to be in a physical uplink shared channel PUSCH And receiving at least a part of a periodic CSI that is required to be transmitted by the UE, where the periodic CSI that needs to be transmitted includes a periodic CSI corresponding to at least two CCs.

The base station according to claim 13, wherein the receiving unit is specifically configured to: receive the periodic CSI that needs to be transmitted on one PUSCH; or receive a part of the physical uplink control channel PUCCH that needs to be transmitted. The periodic CSI receives another portion of the periodic CSI that needs to be transmitted on one PUSCH.

The base station according to claim 14, wherein a periodic CSI that is received by the receiving unit on the PUCCH to be transmitted is a periodic CSI corresponding to one of the at least two CCs, the receiving unit Received on one PUSCH

Or,

A period of the CSI received by the receiving unit on the PUCCH to be transmitted includes a periodic CSI of the first type, and a period CSI that the receiving unit receives on another PUSCH needs to transmit a period CSI of the second type.