A channel quality feedback method and its user terminal and system

A technology of user terminal and channel quality, applied in the field of wireless communication, can solve problems such as abnormal system operation, and achieve the effect of reducing the amount of information and working efficiently

Active Publication Date: 2007-10-17
HUAWEI TECH CO LTD
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Problems solved by technology

[0019] The problem of channel quality feedback in frequency soft multiplexing also exists in the partial frequency multiplexing shown in Figure 6, which may cause the simplified feedback information to contain some useless information or in some special cases the feedback is all useless information, which may cause the system to malfunction

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  • A channel quality feedback method and its user terminal and system
  • A channel quality feedback method and its user terminal and system
  • A channel quality feedback method and its user terminal and system

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Embodiment Construction

[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific implementation methods and accompanying drawings.

[0039] The channel quality feedback method and its user terminal and system of the present invention are not only applicable to systems using frequency soft multiplexing, but also applicable to systems using other frequency multiplexing interference coordination technologies such as partial frequency multiplexing.

[0040] In order to achieve multi-user terminal diversity gain and improve spectrum efficiency, the base station can select subcarriers with better conditions for different user terminals to transmit data based on certain scheduling criteria, so that the propagation conditions of most user terminals are relatively good , so in the frequency soft multiplexing system, the channel quality needs to be fed back to the sending e...

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Abstract

The present invention provides a channel quality feedback method and user terminals and a system including a base station and user terminals. The base station also includes a sub-carrier dividing module for dividing the whole frequency band into N sub-bands (N is a positive integral bigger than 1), and a major-minor sub-band allocating module for allocating the main frequency sub-band and the minor frequency sub-band to each cell for communication; the base station communicates with the user terminals according the sub-band division and the allocating information and the base station also includes a determining module of the sub-band using for determining that the user terminal uses at least one of the main frequency sub-band and the minor frequency sub-band; the user terminal also includes a sub-band using information generating module for generating the sub-band using information of the corresponding user terminal and transmitting the information to the a channel quality feedback module for sending back the channel quality information to the base stations according to the sub-band using information.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a channel quality feedback technology in a frequency multiplexing system. Background technique [0002] Wireless communication systems are usually distinguished by geographical areas, and each communication area in the wireless communication system may be called a cell (cell), such as a cellular wireless communication system. [0003] In order to improve the capacity and spectrum efficiency of broadband wireless communication systems, some multi-carrier technologies have been developed. The basic idea is to divide a broadband carrier into multiple sub-carriers and transmit data on multiple sub-carriers simultaneously. In the application, the width of the subcarrier is required to be smaller than the coherent bandwidth of the system channel, so that the fading on each subcarrier is flat fading, which can reduce the crosstalk between symbols, and does not require complex channel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04Q7/36H04L27/26
Inventor 胡宏杰刘斌
Owner HUAWEI TECH CO LTD
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