Cooperative relay selection method based on improved genetic-particle swarm optimization mixed algorithm

A hybrid algorithm and cooperative relay technology, applied in the field of wireless communication, can solve problems such as optimization without consideration of performance, reduction of transmission power, etc.

Inactive Publication Date: 2015-08-19
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The publication number is CN102202382A, and the invention patent "a relay selection method for reducing transmission power" published on September 28, 2011 considers a relay that reduces transmission power while maintaining the required outage probability Ho

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  • Cooperative relay selection method based on improved genetic-particle swarm optimization mixed algorithm
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  • Cooperative relay selection method based on improved genetic-particle swarm optimization mixed algorithm

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[0059] Hereinafter, the present invention will be further described in detail with reference to the examples and drawings, but the implementation of the present invention is not limited thereto.

[0060] Such as figure 1 , A collaborative relay selection method based on an improved genetic-particle swarm hybrid algorithm, including the following steps:

[0061] Step 1, such as figure 2 In the heterogeneous wireless network shown, the transmitter detects 20 idle relay nodes around when communicating, and obtains channel state information between the transmitter and each relay node.

[0062] Step 2. Define a Particle containing 100 particles k =(X k ,V k )(k=1,...,100) particle population, X k And V k Both are 0-1 arrays with 20 elements, where X k Is the position of the particle, indicating the k-th relay selection scheme, indicating whether the relay of this scheme is selected to participate in cooperative communication, 0 means that the relay node is not selected to participate in ...

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Abstract

The invention discloses a cooperative relay selection method based on an improved genetic-particle swarm optimization mixed algorithm. The method comprises following steps: an emitting terminal detects N accessible relay nodes and obtains channel state information of the nodes; the particle population of a relay selection scheme is expressed in an initialization manner; the speeds and the positions of particles are updated, and the fitness value of the particles is calculated; the individual extremum and the global extremum of the particles are updated; particle position arrays serve as genes, the genes are selected to be recombined and added to the population; the genes are selected for mutation, and the original genes are replaced; new particles which never appear in an iteration process are generated in a random manner and added to the population; M particles with the highest fitness value are selected in the population to form a new generation of the particle population; and whether the particle population is in accordance with the termination condition is determined: if so, the particles with the highest fitness value are selected as the optimal relay selection scheme; and if not, the speeds and the positions of the particles are continuously updated. According to the method, the transmission rate of the emitting terminal is increased as fast as possible, and the power consumption is reduced as low as possible.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a cooperative relay selection method based on an improved genetic-particle swarm hybrid algorithm. Background technique [0002] At present, there are many heterogeneous wireless networks including 2G, 3G, 4G, Wi-Fi, Bluetooth, ultra-broadband, etc. in the wireless communication environment. These networks work independently, and mobile terminals can only access one network at a time. kind of network. How to realize the seamless interconnection of heterogeneous wireless networks so that mobile terminals can fully utilize the resources of each network is a major problem. Heterogeneous wireless network cooperative communication technology can effectively solve the above problems, so it has gradually attracted the attention of researchers at home and abroad. Heterogeneous wireless network cooperative communication technology can realize seamless integration and coop...

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Application Information

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IPC IPC(8): H04W40/22
CPCH04W40/22Y02D30/70
Inventor 冯义志廖杰源林炳辉张军宁更新
Owner SOUTH CHINA UNIV OF TECH
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