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A non-periodic CSI feedback method and device

A non-periodic, user equipment technology, applied in the field of communication, can solve problems such as not supporting channel information

Active Publication Date: 2011-12-21
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The existing technology does not support feeding back channel information corresponding to different measurement sets for different subframe sets or subframe types

Method used

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  • A non-periodic CSI feedback method and device
  • A non-periodic CSI feedback method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1 of the present invention provides an aperiodic CSI feedback method. In this embodiment, the UE can obtain the measurement set information for feedback according to the measurement set corresponding to the subframe that triggers aperiodic CSI feedback, so as to perform aperiodic CSI feedback. CSI feedback. Such as image 3 As shown, the method includes the following steps:

[0040] Step 301, a network side device (such as a base station) sends measurement set configuration information to a UE. Among them, the measurement set is a set of measurement information of one or more transmission points; in specific implementation, the measurement information of the transmission point is generally the information of the downlink reference signal corresponding to the transmission point, for example, the downlink CSI-RS corresponding to the transmission point configuration information or configuration information index. For this sending process, the UE may receive m...

Embodiment 2

[0059] Embodiment 2 of the present invention provides an aperiodic CSI feedback method. In this embodiment, it is assumed that the UE configures 6 downlink subframes in one radio frame, and notifies the UE of the subframes 0, 3, and 4 through high-level signaling. is the measurement subframe set 1, and subframes 1, 2, and 5 are the measurement subframe set 2.

[0060] The base station first needs to configure the measurement set to the UE. The measurement set has a corresponding relationship with the above-mentioned measurement subframe set. For example, for the measurement subframe set 1 composed of subframes 0, 3, and 4, the corresponding measurement set 1 includes transmission point 0. 1; for the measurement subframe set 2 composed of subframes 1, 2, and 5, the corresponding measurement set 2 includes the measurement information of transmission points 0, 1, and 2.

[0061] After the base station notifies the UE of the measurement sets corresponding to the two subframe sets ...

Embodiment 3

[0065] Embodiment 3 of the present invention provides an aperiodic CSI feedback method. In this embodiment, it is assumed that the UE configures 6 downlink subframes in one radio frame, and notifies the UE of the subframes 0, 3, and 4 through high-level signaling. is the measurement subframe set 1, and subframes 1, 2, and 5 are the measurement subframe set 2.

[0066] The base station first needs to configure the measurement set to the UE. The measurement set has a corresponding relationship with the above-mentioned measurement subframe set. For example, for the measurement subframe set 1 composed of subframes 0, 3, and 4, the corresponding measurement set 1 includes transmission point 0. 1; for the measurement subframe set 2 composed of subframes 1, 2, and 5, the corresponding measurement set 2 includes the measurement information of transmission points 0, 1, and 2. And the base station and the UE agree to feed back the CSI corresponding to the measurement set 1 when triggeri...

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Abstract

Disclosed in the present invention are a non-periodic channel state information (CSI) feedback method and device thereof, the method comprises: a user equipment receives measurement set configuration information from a network side equipment; said user equipment receives non-periodic CSI feedback trigger instruction from the network side equipment; said user equipment performs non-periodic CSI feedback on the measurement set corresponding to the sub-frame which receives said trigger instruction. The embodiments of the present invention enable the measurement and feedback of sub-frame in the sub-frame set, thus solving the problem that different sub-frame sets requires different transmission points while simultaneously utilizing coordinate multipoint transmission / reception (CoMP) and enhanced inter cell interference coordination (eICIC).

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular to a method and device for aperiodic CSI feedback. Background technique [0002] CoMP (Coordinated Multipoint Transmission / Reception, Coordinated Multipoint Transmission) technology refers to the collaboration between geographically separated multiple transmission points. Generally speaking, multiple transmission points are base stations of different cells, or multiple RRHs (Remote Radio Head, remote radio unit) controlled by the same cell base station. Coordinated transmission between multiple transmission points can effectively reduce interference between different transmission points and improve throughput of users (especially cell edge users). [0003] The current downlink multi-point coordinated transmission technical solutions are mainly divided into: cooperative scheduling / beam forming (CS / CB, cooperative scheduling / beam forming) and joint processing (Join...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
CPCH04L1/0026H04L1/16H04L1/0027
Inventor 陈文洪高秋彬彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD
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