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User-channel-quality-based collaborative user selection method for source users

A technology for cooperating users and channel quality, used in wireless communication, electrical components, etc.

Inactive Publication Date: 2013-07-17
BEIJING UNIV OF TECH
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  • Description
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  • Application Information

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Problems solved by technology

This method solves the problem of how to select and determine the optimal cooperative user when there are multiple candidate cooperative users in the network, and improves the system capacity by selecting the appropriate cooperative user

Method used

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  • User-channel-quality-based collaborative user selection method for source users
  • User-channel-quality-based collaborative user selection method for source users
  • User-channel-quality-based collaborative user selection method for source users

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Embodiment Construction

[0032] The specific implementation of the cooperative user selection scheme based on user channel quality in LTE uplink is described with reference to the drawings and examples.

[0033] The simulation realization of the present invention on the PC is to use the Matlab language for programming. Matlab is an advanced matrix language, including control statements, functions, data structures, input and output, and object-oriented programming features. It is a collection of a large number of calculation algorithms. It has more than 600 mathematical operation functions used in projects, which can easily realize various calculation functions required by users.

[0034] After checking the algorithm proposed by the present invention, the obtained result can be more accurate for the selection method of cooperative users that optimizes the signal-to-noise ratio and energy gain based on the channel conditions of the users.

[0035] based on figure 2 The comparison chart of the bit err...

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Abstract

A user-channel-quality-based collaborative user selection method for source users is applicable to the technical field of uplink directional collaborative communication system of LTE (Long Term Evolution) of wireless communication 3GPP (3rd Generation Partnership Project) and is characterized by sequentially computing respective SNRs (signal to noise ratio) of a source user and a collaborative user and energy gains between the source user and the collaborative user; selecting the user with the largest energy gains as an alternative collaborative user; and then under the condition that the energy gains are guaranteed to be the largest, investigating the SNR between the collaborative user and a base station and performing matching optimization of optimal collaboration users to select out a collaborative user with an optimized channel condition and the best forwarding effect. The user-channel-quality-based collaborative user selection method for the source users has the advantages of utilizing the method of channel quality optimization to comprehensively consider the channel conditions of the collaborative users and changes of corresponding SNRs and energy gains, achieving the optimal matching of source users and collaborative users in a system and guaranteeing the objective optimization of collaborative user selection.

Description

technical field [0001] The invention relates to a method for cooperative user selection of a source user based on channel quality between the cooperative user and a base station in cooperative communication, and belongs to the related field of LTE uplink cooperative communication relay selection research in wireless communication. Background technique [0002] With users' demand for high-speed mobile communications, the 3rd Generation Partnership Project (3GPP, 3 rd Generation Partnership Project) launched the LTE (Long Term Evolution) research project in 2004. Design goals of the LTE system: increase data rate, reduce transmission delay, improve system spectrum efficiency, reduce operating costs, etc. However, in the actual communication process, the cell interference of the cellular communication system is unavoidable, which leads to the reduction of the transmission reliability of the cell link. Therefore, how to ensure transmission reliability in the LTE system has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/02
Inventor 孙恩昌李萌张延华苏啸尘司鹏搏杨睿哲孙艳华
Owner BEIJING UNIV OF TECH
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