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Configuration method of channel state information, feedback method of channel state information, base station and terminal

A technology of channel state information and configuration method, applied in the field of communication, can solve the problems of insufficient PUCCH capacity, decreased CoMP performance gain, complicated feedback design, etc.

Active Publication Date: 2013-11-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because CoMP needs to consider the CSI feedback for multiple cells, it requires N*11-bit PUCCH capacity capability, but the current PUCCH capacity cannot meet this requirement, so a reasonable feedback scheme is needed to solve the problem of insufficient PUCCH capacity
It is easy to think of compressed feedback signaling, but CoMP has higher requirements for CSI accuracy, especially JT and even JT-MU have higher requirements for CSI accuracy, so the performance loss caused by compression may cause CoMP performance gain drop
Another consideration may be to increase the capacity of PUCCH, and the feedback format of PUCCH needs to be redesigned, which will inevitably bring about greater standardization efforts
If you consider the different requirements for CSI feedback between different modes of CoMP and the need to ensure adaptive switching of different modes, this feedback design may be more complicated

Method used

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  • Configuration method of channel state information, feedback method of channel state information, base station and terminal
  • Configuration method of channel state information, feedback method of channel state information, base station and terminal
  • Configuration method of channel state information, feedback method of channel state information, base station and terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0097] Assuming that UE1 is a user of R11 or higher version, the base station configures the terminal side to measure and feed back multiple CSI-RS resources through high-level signaling, and the base station configures UE1 to feed back three non-zero-power CSI-RS resource channels through high-level signaling The status information is CSI-RS resource 1, CSI-RS resource2 and CSI-RS resource 3 respectively. In addition, the base station side configures UE1 with two sets of IMR through UE-specific high-level signaling. The first set of IMR is only used for the feedback of channel state information of CSI-RS resource 1, and the second set of IMR is used for CSI-RS resource 1, CSI - Feedback of channel state information of RS resource 2 and CSI-RS resource3. And the same RI and / or PTI are used for the channel state information feedback of multiple CSI-RS resources corresponding to the second set of IMRs.

Embodiment 2

[0099] Assuming that UE1 is a user of R11 or higher version, the base station configures the terminal side to measure and feed back multiple CSI-RS resources through high-level signaling, and the base station configures UE1 to feed back three non-zero-power CSI-RS resource channels through high-level signaling The status information is CSI-RS resource 1, CSI-RS resource2 and CSI-RS resource 3 respectively. In addition, the base station side configures UE1 with two sets of IMR through UE-specific high-level signaling. The first set of IMR is only used for the feedback of channel state information of CSI-RS resource 1, and the second set of IMR is used for CSI-RS resource 1, CSI - Feedback of channel state information of RS resource 2 and CSI-RS resource3. The same RI is used for the channel state information feedback of multiple CSI-RS resources corresponding to the second set of IMRs. And for the PMI1 / CQI1, PMI2 / CQI2, and PMI3 / CQI3 of the three CSI-RS resourced of the second ...

Embodiment 3

[0101] Assuming that UE1 is a user of R11 or higher version, the base station configures the terminal side to measure and feed back multiple CSI-RS resources through high-level signaling, and the base station configures UE1 to feed back three non-zero-power CSI-RS resource channels through high-level signaling The status information is CSI-RS resource 1, CSI-RS resource2 and CSI-RS resource 3 respectively. In addition, the base station side configures UE1 with two sets of IMR through UE-specific high-level signaling. The first set of IMR is only used for the feedback of channel state information of CSI-RS resource 1, and the second set of IMR is used for CSI-RS resource 1, CSI - Feedback of channel state information of RS resource 2 and CSI-RS resource3. The base station configures UE1 with two sets of IMRs corresponding to different codebook cluster restriction sets through UE-specific high-level signaling. The first IMR is configured with a set of codebook cluster restrictio...

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Abstract

The invention provides a configuration method of channel state information, a feedback method of the channel state information, a base station and a terminal. The feedback method of the channel state information includes the steps that a terminal side receives a configuration instruction sent by a base station side, and the terminal side feeds back an RI and / or a precoding type indicator, a precoding matrix indicator and a channel quality indicator to the channel state information of a plurality of non-zero-power channel state information reference signal resources configurated with the same interference measurement resources according to the configuration instruction, wherein the RI and the PTI are same, and the PMI and the CQI are independent. According to the technical scheme, the same RI and / or the PTI are fed back to the channel state information of the non-zero-power CSI-RSs configurated with the same IMRs, the rules for uplink feedback are simplified and unified while uplink feedback expenditure is greatly reduced, and the collision probability of uplink channel state information feedback is reduced.

Description

technical field [0001] The present invention relates to the communication field, in particular to a channel state information configuration method, a feedback method, a base station and a terminal. Background technique [0002] After the Long Term Evolution (LTE for short) system has gone through several versions of R8 / 9 / 10, the R11 technology has been accurately studied successively. At present, some R8 products are gradually commercialized, and R9 and R10 are subject to further product planning. [0003] After going through the stages of R8 and R9, R10 added many new features on the basis of the first two, such as demodulation reference signal (Demodulation Reference Signal, DMRS), channel state information reference signal (Channel State Information Reference Signal, CSI -RS) and other pilot characteristics, 8-antenna support and other transmission and feedback characteristics, etc., especially the enhanced inter-cell interference cancellation (ehanced Inter-Cell Interfe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04W72/04H04W74/08
Inventor 郭森宝孙云锋李儒岳张峻峰
Owner ZTE CORP
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