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A method and system for channel quality measurement in a coordinated multipoint system

A channel quality measurement and channel quality technology, applied in the field of wireless communication

Active Publication Date: 2017-11-24
ZTE CORP
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method and system for channel quality measurement in a coordinated multi-point system, which is used to solve the problem of realizing multi-cell joint processing through CSI-RS based on coordinated multi-point in the prior art and harmonize specific technical deficiencies

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  • A method and system for channel quality measurement in a coordinated multipoint system
  • A method and system for channel quality measurement in a coordinated multipoint system
  • A method and system for channel quality measurement in a coordinated multipoint system

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[0024] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0025]Two new reference signals are defined in LTE Release 10: Channel State Indication Reference Signal (CSI-RS, Channel State Indication-Reference Signal) and Demodulation Reference Signal (DMRS, DemodulationReference Signal), the main purpose is to further optimize the channel measurement overhead and improve the flexibility of channel measurement and demodulation. Among them, the CSI-RS is dedicated to the measurement of the channel. Through the measurement of the CSI-RS, the precoding matrix index (PMI, Precoding Matrix Indicator) and channel quality information indicator (CQI, Channel Quality Indicator) that the UE needs to feed back to the Cell can be calculated. and Rank Indicator (RI, Rank Indicator); the distribution of CSI-RS in the time domai...

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Abstract

Disclosed are a method and a system for measuring channel quality in a coordinated multi-point system. The coordinated multi-point system comprises multiple coordination points. The method comprises: a main coordination point in the multiple coordination points determining a channel state information reference signal configuration parameter; the multiple coordination points determining, according to the channel state information reference signal configuration parameter, subframes for sending channel state information reference signals, the subframes for sending the channel state information reference signals and determined by all the coordination points according to the channel state information reference signal configuration parameter being different from each other; and all the coordination points sending the channel state information reference signals on the determined subframes, so that a user equipment measures channel quality according to the channel state information reference signals. The user equipment can detect channel quality of corresponding channels according to CSI-RSs from different coordination points, so that the MIMO technology is no longer limited to a single cell and enables joint processing and coordination of multiple cells.

Description

technical field [0001] The invention relates to wireless communication technology, a method and system for channel quality measurement in a coordinated multi-point system. Background technique [0002] With the rapid development of wireless communication technology, the serious shortage of spectrum resources has gradually become the main factor restricting the development of wireless communication. How to make full use of limited spectrum resources and improve spectrum utilization is an important research direction of wireless communication. The multiple input multiple output (Multiple Input Multiple Out, MIMO) technology is widely favored because it can improve transmission efficiency and spectrum utilization without increasing bandwidth. MIMO technology utilizes space diversity gain through transmit diversity and receive diversity, utilizes antenna array gain through beamforming (Beamforming) technology, and utilizes space multiplexing gain through spatial multiplexing tec...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/024H04L5/00
CPCH04L1/06H04L1/0026H04L1/0027H04L1/0028H04L1/20H04L5/0035H04L5/0048
Inventor 关艳峰陈艺戬郁光辉
Owner ZTE CORP
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