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

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...

AI Technical Summary

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 However, this invention also selects in a homogeneous network environment. It only considers selecting a single relay node for cooperation, and only takes power minimization as the optimization goal, and does not consider the optimization of other performances.

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