Method, device and system for processing feedback information of channel state

A technology for feedback information and channel status, applied in the field of communication, can solve problems such as the inability to meet the technical requirements of multi-user MIMO, and achieve the effect of improving channel performance

Active Publication Date: 2011-06-15
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the CSI is fed back with the precoding technique used in the single-user MIMO technique, it cannot meet the requirements of the multi-user MIMO technique

Method used

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  • Method, device and system for processing feedback information of channel state
  • Method, device and system for processing feedback information of channel state
  • Method, device and system for processing feedback information of channel state

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Embodiment Construction

[0024] figure 1 A schematic diagram of a system 1000 is shown by way of example, and the system 1000 includes a terminal 1010 and a base station 1020 .

[0025] In the embodiment of the present invention, the downlink data transmission technology sent by the base station 1020 to the terminal 1010 uses HSDPA (High Speed ​​Downlink Packet Access, high speed downlink packet access) technology.

[0026] If the system 1000 is a multi-user MIMO system based on HSDPA technology, that is, when the system 1000 includes multiple terminals 1010, the base station 1020 needs to precode different data streams sent to different terminals 1010, and then send them to different data streams on different antennas. terminal 1010 to reduce interference between antennas. The precoding algorithm under multi-user MIMO is more complex than single-user MIMO. For example, in order to reduce CCI (Co-Channel Interference, co-channel interference) caused by multiple terminals 1010 using the same MIMO cha...

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Abstract

The embodiment of the invention discloses a method, a device and a system for processing feedback information of a channel state. The method for processing the feedback information of the channel state is used for a communication system using a multiple-input multiple-output technology and comprises the following steps of: transmitting a media access control (MAC) protocol data unit flow on an uplink physical service channel, wherein one or more MAC protocol data units in the MAC protocol data unit flow comprise the feedback information of the channel state information (CSI) of a downlink channel; and sending indication information, wherein the indication information indicates the positions of the one or more MAC protocol data units in the MAC protocol data unit flow. Compared with the mode that a terminal feeds an index number of a pre-coding codebook back to a base station through a pre-coding control indication field of a high speed-dedicated physical control channel (HS-DPCCH), the terminal can carry more information in the mode of carrying the feedback information in the MAC protocol data units.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method, device and system for processing channel state feedback information. Background technique [0002] At present, a MIMO (Multiple-Input Multiple-Output, multiple-input multiple-output) technology has emerged. A system that uses multiple antennas at both the transmitter and receiver can increase the channel transmission capacity compared to a system that uses a single antenna. The MIMO technology may include a single-user MIMO (Single-User MIMO, SU-MIMO) technology and a multi-user MIMO (Multi-User MIMO, MU-MIMO) technology. The single-user MIMO technology is a point-to-point technology, in which the communication is realized by allocating the same wireless resource to a single user at the same time. The multi-user MIMO technology is a point-to-multipoint MIMO technology, in which the way of realizing communication is to allocate the same wireless resource to multiple ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04W80/02
Inventor 马洁任晓涛高永强韩静周欢
Owner HUAWEI TECH CO LTD
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