CQI adjusting method based on position information and base station

A technology for location information and base stations, applied in wireless communication, digital transmission systems, electrical components, etc., can solve the problem of increasing the complexity of feedback overhead mobile stations, and achieve the effect of reducing feedback overhead, improving efficiency, and ensuring matching

Inactive Publication Date: 2014-07-09
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0005] The present invention provides a CQI adjustment method based on location information and a base station to solve the problem in the prior art that a mobile station needs to measure channel quality separately and feed back CQI information, resulting in increased feedback overhead and complexity of the mobile station. The invention adopts the following technical scheme:

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  • CQI adjusting method based on position information and base station
  • CQI adjusting method based on position information and base station

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] In the technical solution of a location information-based CQI adjustment method provided in the embodiment of the present invention, as figure 1 shown, including:

[0024] 11. The base station divides the covered area according to the distribution of signal field strength in the coverage area, and determines the corresponding reference CQI in each small area after division according to specific rules, and saves each small area and its corresponding reference...

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Abstract

A CQI (Channel Quality Indicator) adjusting method based on position information and a base station belong to the technical field of wireless communication. The base station partitions the covering area firstly, determines the reference CQI corresponding to each partitioned small area according to specific rules, and saves each small area and the reference CQI corresponding to each small area; then position information of a mobile station is predicted in scheduling time according to the obtained position information of the mobile station, the small area where the mobile station is positioned in the time can be determined according to position information of the mobile station in scheduling time, and the reference CQI corresponding to small area that the mobile station is positioned in scheduling time is determined by finding each saved small area and the reference CQI corresponding to each saved small area; and finally, the reference CQI corresponding to small area that the mobile station is positioned in scheduling time can be adjusted according to the number of acknowledgment signals or disacknowledgment signals. The feedback overhead and the complexity of the mobile station are reduced, and the matching with a real channel environment can be ensured at the same time.

Description

technical field [0001] The invention relates to a CQI adjustment method based on location information and a base station, belonging to the technical field of wireless communication. Background technique [0002] In the cellular mobile communication system, in order to meet the increasing demand for packet services, especially for downlink services, 3GPP introduced the HSDPA (High Speed ​​Downlink Packet Access) technology in the R5 standard. HSDPA uses technologies such as AMC (Adaptive Modulation and Coding, adaptive modulation and coding), HARQ (Hybrid Automatic Repeat Request, hybrid automatic repeat request) and high-order modulation to quickly adapt to changes in user channels, improve transmission rates and System throughput. [0003] Among them, AMC actually adjusts the encoding rate and modulation mode adaptively according to channel conditions. When the channel condition is good, choose a high-efficiency coding and modulation method to increase the transmission ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04W64/00
Inventor 罗涛赵偲为尹长川刘丹谱郝建军李剑峰
Owner BEIJING UNIV OF POSTS & TELECOMM
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