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Feedback method, device and system for CoMP

A technology of multi-point cooperation and configuration information, applied in the field of communication, can solve the problem of difficult to introduce reporting content dependencies, etc.

Active Publication Date: 2014-01-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this method is that it is not easy to introduce dependencies between the reported content, especially when the dependent content is scattered into different reporting modes

Method used

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  • Feedback method, device and system for CoMP
  • Feedback method, device and system for CoMP
  • Feedback method, device and system for CoMP

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] The base station configures two feedback modes for the terminal: M1 and M2. The corresponding CSI-RS resources of M1 and M2 are CSI-RS1 and CSI-RS2 respectively, that is, M1 and M2 report channel state information of two transmission points respectively.

[0092] The RI reference mode of M2 is M1, that is, the PMI / CQI reported by M2 is calculated based on the last RI reported by M1, and the M2 mode itself does not report RI. The RI reference mode of M1 is itself (or the RI reference mode is not configured, and the default RI reference mode is itself by default), that is, M1 reports RI.

[0093] The terminal estimates the channel state information according to the CSI-RS1, combines the interference obtained from the interference measurement resource, calculates the RI and reports it. The PMI reference modes of M1 and M2 are their own (or neither is configured with a PMI reference mode, and the default PMI reference mode is itself), and the terminal is respectively based...

Embodiment 2

[0097] The base station configures two feedback modes for the terminal: M1 and M2. The corresponding CSI-RS resources of M1 and M2 are both CSI-RS1, and the interference measurement resources of M1 and M2 are IMR1 and IMR2 respectively, that is, M1 and M2 respectively report the channel state information of the same transmission point under two different interference states .

[0098] The PMI reference mode of M2 is M1, that is, the CQI reported by M2 is calculated based on the PMI (which can be limited to wideband PMI) reported by M1 last time, and the M2 mode itself does not report PMI. The PMI reference mode of M1 is itself (or the PMI reference mode is not configured, and the PMI reference mode is defaulted to itself at this time), that is, M1 reports PMI, and the terminal estimates the channel state information according to CSI-RS1, combined with the interference measurement resource IMR1. interference, calculate and report the PMI.

[0099] At this time, the RI referen...

Embodiment 3

[0103] The base station configures three feedback modes for the terminal: M1, M2 and M3. The CSI-RS resource configured by M1 is CSI-RS1, the interference measurement resource is IMR1, the CSI-RS resources configured by M2 and M3 are both CSI-RS2, and the interference measurement resources of M2 and M3 are IMR2 and IMR3, namely M2 and M3 Report the channel state information of the same transmission point under two different interference states respectively, and M1 reports the channel state information of another transmission point.

[0104] Such as Image 6 As shown, the RI reference mode of M1 is itself (or the RI reference mode is not configured, and the RI reference mode is defaulted to itself at this time), that is, M1 reports RI, and the terminal estimates the channel state information according to CSI-RS1, combined with the interference measurement For the interference obtained by the resource IMR1, the RI is calculated and reported.

[0105] The PMI reference mode of ...

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Abstract

The present invention relates to the field of communications. Disclosed are a CoMP transmission feedback method, device and system, the method comprising: determining an inter-mode reference relationship between at least two configured modes according to configuration information transmitted by a base station (s101); at each feedback instance, determining the parameter in the current mode via the parameter in a reference mode and according to the reference relationship between modes (s102); and feeding back the channel state information containing the parameter in the current mode according to the configuration of the current mode (s103). The present invention realizes the sharing of pre-coding matrix indicator / rank indicator (PMI / RI) information among a plurality of channel quality indicators (CQIs) having different interference assumptions, and realizes the sharing of RI information among different transmission points, thus achieving a dependency relationship among a plurality of feedback modes.

Description

[0001] This application claims the priority of the Chinese patent application submitted to the China Patent Office on June 11, 2012, with the application number 201210192004.5, and the title of the invention is "a feedback method, device and system for multi-point coordinated transmission". References are incorporated in this application. technical field [0002] The present invention relates to communication technology, in particular to a feedback method, device and system for multi-point coordinated transmission. Background technique [0003] The Long-Term Evolution-Advanced (LTE-A, Long-Term Evolution-Advanced) system adopts the same-frequency networking, which not only greatly improves the spectrum utilization rate, but also causes serious signal fading of users at the edge of the cell, and at the same time suffers from high interference from other users. Cell interference, if signal fading and interference problems are not dealt with, will seriously affect the experienc...

Claims

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Application Information

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IPC IPC(8): H04L1/16
CPCH04L1/16H04L1/0026H04L1/0029H04B17/309H04B7/024H04B7/0619H04B7/063H04B7/0632H04B7/0639H04B7/066H04B17/24H04L1/0028H04B7/0417H04B7/0486H04L5/0035H04L5/0048H04L5/0053H04L5/0057
Inventor 高秋彬张然然倪浩彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD
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