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Precoding matrix indicator (PMI) sending and receiving method, and devices

A technology of precoding matrix and receiving method, which is applied in the field of sending and receiving method and equipment indicated by precoding matrix, to achieve the effects of solving ambiguity problems, reducing PMI feedback overhead, and avoiding loss of PMI accuracy

Inactive Publication Date: 2017-01-11
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] This application provides a method and device for sending and receiving precoding matrix indications to solve the PMI feedback problem in a multi-user multi-antenna system

Method used

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  • Precoding matrix indicator (PMI) sending and receiving method, and devices
  • Precoding matrix indicator (PMI) sending and receiving method, and devices
  • Precoding matrix indicator (PMI) sending and receiving method, and devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] image 3 It is a schematic flow chart of a preferred PMI receiving method in this application, which is applicable to the base station side, see image 3 , the process includes:

[0077] Step 1: Divide the codebook subset constraints into: the first codebook subset constraint set and the second codebook subset constraint set, and respectively form the corresponding first codebook subset constraint signaling and the second codebook subset Constraint signaling. Wherein, the first codebook subset constraint signaling indicates the PMI sets available in all PMIs, and the second codebook subset constraint signaling indicates the UE available PMI sets on the basis of the first codebook subset constraint signaling. The second codebook subset restriction signaling cannot change the RI restriction, and the frequency of sending the second codebook subset restriction signaling is greater than or equal to the frequency of sending the first codebook subset restriction signaling. ...

Embodiment 2

[0095] Figure 4 It is a schematic flow diagram of a preferred PMI sending method in this application, which is applicable to the UE side, see Figure 4 , the process includes:

[0096] Step 1: Receive RRC signaling through PDSCH detection, including the first codebook subset constraint signaling, CQI reporting configuration, CSI-RS configuration, etc.

[0097] Step 2: Obtain DCI through PDCCH detection, so as to obtain second codebook subset constraint signaling.

[0098] Step 3: According to the method in Step 1 of Embodiment 1, reversely obtain the complete codebook subset constraint through the first codebook subset constraint signaling and the second codebook subset constraint signaling, and then use the channel state information reference signal (CSI-RS) and channel state information interference measurement (CSI-IM) calculate the CSI to be reported, which includes the PMI.

[0099] Step 4: Send the acknowledgment signal of the first codebook subset constraint signali...

Embodiment 3

[0104] Corresponding to the above PMI receiving method, this embodiment provides a PMI receiving device, and its preferred composition structure is as follows Figure 5 As shown, the PMI receiving equipment includes:

[0105] A sending module, configured to send the first codebook subset constraint signaling and the second codebook subset constraint signaling; wherein, the first codebook subset constraint signaling indicates the PMI sets available in all PMIs, and the second codebook The subset constraint signaling indicates the PMI set available to the UE on the basis of the first codebook subset constraint signaling;

[0106] The receiving module is configured to receive the CSI reported by the UE, where the CSI includes the PMI obtained by the UE after referring to the first codebook subset constraint signaling and the second codebook subset constraint signaling.

[0107] Preferably, Figure 5 The shown PMI receiving device may also include a scheduling module and a preco...

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Abstract

The invention discloses a precoding matrix indicator (PMI) receiving method, which comprises steps: first codebook subset constraint signaling is sent, wherein the first codebook subset constraint signaling indicates an available PMI set in all PMIs; second codebook subset constraint signaling is sent, wherein on the basis of the first codebook subset constraint signaling, the second codebook subset constraint signaling indicates an available PMI set for UE; and CSI (Channel State Information) reported by the UE is received, wherein the CSI comprises PMIs obtained when the UE refers to the first codebook subset constraint signaling and the second codebook subset constraint signaling. The invention also discloses a PMI sending method, a PMI receiving device and a PMI sending device. When the technical scheme disclosed by the invention is applied, the PMI feedback problem in a multiuser multi-antenna system can be solved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular, to a method and device for sending and receiving a precoding matrix indication. Background technique [0002] In the multiple input multiple output (MIMO) system of mobile communication, the wireless fading channel has time-varying characteristics. In order to effectively transmit signals, it is necessary to obtain channel information to realize user scheduling, spatial precoding and modulation and coding schemes ( Modulation and Coding Scheme, MCS) selection, etc. In order to obtain channel information, the base station (eNB) sends control signaling to instruct the terminal (user equipment, User Equipment, UE) to feed back corresponding channel state information (Channel State Information, CSI). [0003] The eNB controls the time and frequency resources used by the UE to report (report) channel state information. Wherein, in the long-term evolution s...

Claims

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Application Information

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IPC IPC(8): H04B7/04
CPCH04B7/0639H04B7/0478H04B7/0456H04B7/0452
Inventor 张然然付景兴荆梅芳曹建飞桂鑫杨昂
Owner BEIJING SAMSUNG TELECOM R&D CENT
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