Transmission method and device based on channel state information of codebook

A technology of channel state information and codebook, applied in the field of communication

Active Publication Date: 2014-12-24
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0046] Embodiments of the present invention provide a codebook-based transmission method and device for channel state information, which is used to solve the problem that there is currently no specific solution for channel state information feedback based on an enhanced codebook in the case of four antenna ports. question

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  • Transmission method and device based on channel state information of codebook
  • Transmission method and device based on channel state information of codebook
  • Transmission method and device based on channel state information of codebook

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Embodiment Construction

[0076] The present invention implements the feedback of channel state information based on the enhanced codebook in the case of 4 antenna ports through the compressed 4-antenna codebook and the corresponding relationship defined in the set joint coding rule.

[0077] In order to support dual PMI feedback, when the number of antenna ports (CRS ports or CSI-RS ports) is 8, PUCCH reporting mode 1-1 further supports the following two submodes (Submode):

[0078] Submode1: Contains 2 types of report types: report type 5, used to feed back RI and first PMI; report type 2b, used to feed back CQI and second PMI;

[0079] Submode2: includes 2 report types: report type 3, used for feeding back RI; report type 2c, used for feeding back CQI, first PMI, and second PMI.

[0080] In the case of 4 antenna ports, the precoding matrix in the enhanced codebook consists of each precoding matrix in the first precoding matrix set corresponding to the first PMI and each precoding matrix in the secon...

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Abstract

The invention embodiment discloses a transmission method and device based on channel state information of a codebook; there is no specific scheme for returning the channel state information according to an enhanced codebook in the prior art under four antenna ports; the application can solve the said problems; the method comprises the following steps: a terminal receives indication information sent by a base station, and determines RI and a pre-encoding matrix from compressed four antenna codebooks; determining the RI and a combined coded value used for indicating a first PMI of a first codebook index of the pre-encoding matrix according to set combined coding rules; sending the combined coded value to the base station in a set feedback time according to a feedback mode indicated in the indication information, and sending a second PMI of a second codebook index of the pre-encoding matrix and a CQI to the base station in another set feedback time, thus carrying out channel state information feedback based on the enhanced codebook under four antenna ports.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a codebook-based transmission method and device for channel state information. Background technique [0002] Currently, the Long Term Evolution-Advanced (LTE-A) system supports 10 transmission modes and 4 physical uplink control channel (Physical Downlink Control Channel, PUCCH) reporting modes. Based on the semi-static configuration of high-layer signaling, the terminal (User Equipment, UE; also called user equipment) periodically feeds back different channel quality indicators (Channel Quality Indication, CQI), precoding matrix identification (Precoding Matrix Indication, PMI) and rank indication (Rank Indication, RI). [0003] [0004] Table 1 [0005] Specifically, for each transmission mode, it supports the following PUCCH reporting modes: [0006] Transmission Mode 1: Mode 1-0 and Mode 2-0. [0007] Transmission mode 2: mode 1-0 and mode 2-0. [0008]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
CPCH04B7/0639H04B7/0456H04B7/0617H04B7/0619H04B7/063H04B7/0632
Inventor 张然然苏昕拉盖施
Owner DATANG MOBILE COMM EQUIP CO LTD
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