Method and device for reporting channel quality indication

A channel quality indication and channel quality technology, which is applied in the reporting field of channel quality indication, can solve the problem of heavy signaling burden and achieve the effect of reducing signaling burden and information bits

Active Publication Date: 2007-06-27
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

When the total number of frequency bands in the system is large, the signaling burden is still very large

Method used

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  • Method and device for reporting channel quality indication
  • Method and device for reporting channel quality indication
  • Method and device for reporting channel quality indication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0114] In order to illustrate the method of the invention, an example of the method of the invention is given below.

[0115] Firstly, an example of a method for determining the number M of sub-frequency bands for the total CQI report of the system is given:

[0116] The method for determining M is to divide the transmission bandwidth of the system by the width of the sub-frequency band reported by the CQI.

[0117] According to the discussion of the current 3GPP LTE system, the bandwidth of the system can be 1.25M, 2.5M, 5M, 10M, 15M and 20M, and the corresponding transmission bandwidth is 1.125M, 2.25M, 4.5M, 9M, 13.5M and 18M. It should be noted that the transmission bandwidth is smaller than the system bandwidth, because the system bandwidth is equal to the transmission bandwidth plus the guard bandwidth.

[0118] Here are a few examples of calculating M:

[0119] If the bandwidth of the system is 10MHz, that is, the transmission bandwidth is 9M, and the width of the sub...

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Abstract

This invention relates to an instruction method for reporting channel qualities of user devices including: a user device gets to know M, the system total CQI report sub-band number and N, the being reported CQI reported sub-band number to measure channel qualities on all sub-bands to determine N CQI sub-bands going to be reported and the CQI value and transmits the L long bit sequence for instruction to the base station, and the length is: L=[ log2CNM ] and transmits the CQI value on the sub-band going to be reported to the base station. Compared with the bit mapping method, this invention uses a short bit sequence to instruct the sub-band to be reported so as to reduce the information bit necessary for instructing band.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a method for reporting channel quality indicators used for frequency scheduling in the wireless communication system. Background technique [0002] Now, The 3rd Generation Partnership Project (The 3 rd The Generation Partnership Project (abbreviated as 3GPP) standardization organization has embarked on long-term evolution (LTE) of its existing system specifications. Among many physical layer transmission technologies, Orthogonal Frequency Division Multiplexing (OFDM) technology has become a promising one among all downlink schemes because of its high spectrum utilization rate and low processing complexity. [0003] OFDM technology is essentially a multi-carrier modulation communication technology. Its basic principle is to decompose a high-rate data stream into several low-rate data streams and transmit them simultaneously on a group of mutually orthogonal sub-carriers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/00H04L27/26
Inventor 孙程君张玉建李小强李周镐
Owner BEIJING SAMSUNG TELECOM R&D CENT
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