Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Feedback method and device of non-periodic channel state information as well as mobile terminal

A channel state information, feedback device technology, applied in the directions of space transmit diversity, diversity/multi-antenna systems, etc., to achieve the effect of enhanced feedback

Active Publication Date: 2013-09-18
CHINA MOBILE COMM GRP CO LTD
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Embodiments of the present invention provide an aperiodic channel state information (CSI) feedback method, device, and mobile terminal to solve the problem of feedback load brought by enhanced CSI feedback in MU-MIMO technology and CS / CB technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Feedback method and device of non-periodic channel state information as well as mobile terminal
  • Feedback method and device of non-periodic channel state information as well as mobile terminal
  • Feedback method and device of non-periodic channel state information as well as mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0058] The base station antenna is 4 antennas, dual-polarized antennas. The codeword consists of row 1, row 2, row 5 and row 6 of the 8-antenna codeword.

[0059] The UE is configured in non-carrier aggregation mode. When the UE receives the CQI request sent by the base station, if the bit of the CQI request is "1", it indicates that CQI and PMI need to be fed back;

[0060] If RI=1, UE feeds back CQI and PMI (including traditional CQI, additional CQI and traditional PMI) according to Table 4 below:

[0061] Table 4

[0062] Wideband CQI codeword 0

4

Wideband extra CQI codeword 0

3

Broadband PMI1

4

Subband PMI2

4N

[0063] If RI>1, UE feeds back CQI and PMI (including traditional CQI, traditional PMI and additional CQI) according to Table 5 below:

[0064] table 5

[0065] feedback subfield

example 2

[0067] The base station antenna is 4 antennas, dual-polarized antennas. The codeword consists of row 1, row 2, row 5 and row 6 of the 8-antenna codeword.

[0068] The UE is configured in the carrier aggregation mode, and the carrier components include CC0, CC1, CC2 and CC3. When the UE receives the CQI request sent by the base station on the carrier component CC0, it finds that the bit of the CQI request is "01", indicating that it needs to feed back CQI / PMI;

[0069] The UE feeds back the traditional CQI and traditional PMI on the carrier component CC0 according to the above table 1;

[0070] The UE feeds back additional CQI and additional PMI on the carrier component CC1 according to the following table 6:

[0071] Table 6

[0072] feedback subfield

RI=1

RI=2

RI=3

RI=4

Wideband extra CQI codeword 0

4

4

4

4

Wideband extra CQI codeword 1

0

4

4

4

Broadband Extra PMI1

4

4

2

2

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the invention provides a feedback method and device of non-periodic CSI (Channel State Information) as well as a mobile terminal. When UE (User Equipment) receives a request for feeding back a CQI (Channel Quality Indicator) request of CSI, traditional PMI (Precoding Matrix Indicator) and a traditional CQI are fed back, and extra CSI needing to be fed back is determined according to a carrier resource confirmation manner of the UE and a usable feedback resource; and the usable feedback resource is used for feeding back the extra CSI, wherein the usable feedback resource is a feedback resource increased on the basis of a traditional broadband feedback mode 1-2 or an idle feedback resource in the traditional broadband feedback mode 1-2. According to the feedback method, device and system of the non-periodic CSI disclosed by the embodiment of the invention, on the basis of the prior art, the feedback of the enhanced CSI is realized under the condition of not increasing the feedback resource or limitedly increasing the feedback resource; and the realization of MU-MIMO (Multiple User-Multiple Input Multiple Output) and CS / CB (Coordinated Scheduling / Beamforming) schemes is effectively supported.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a feedback method, device and mobile terminal of aperiodic channel state information (CSI). Background technique [0002] The enhancement of downlink multi-antenna (MultipleInputMultipleOutput, MIMO) transmission and the enhancement of corresponding channel state information (ChannelStateInformation, CSI) feedback is an important standardization point of the current 3GPPL TERel.11 specification. In the existing technical specification, three indication information are defined The downlink CSI report includes channel quality indicator (ChannelQualityIndicator, CQI), precoding matrix indicator (PrecodingMatrixIndicator, PMI) and channel rank indicator (RankIndex, RI). In an 8-antenna system, the PMI consists of two levels of feedback, PMI1 and PMI2. At the same time, the existing specifications define two types of feedback modes, periodic and aperiodic, for th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06
Inventor 潘成康刘建军王启星刘光毅
Owner CHINA MOBILE COMM GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com