D2D communication resource optimization method based on multi-population genetic algorithm

Abstract

The invention discloses a D2D communication resource optimization method based on a multi-population genetic algorithm, and relates to the technical field of D2D communication frequency spectrum resource distribution in an LTE network. The method comprises respectively establishing a system model and a channel model; the adopted resource distribution method comprises the following steps: (1) setting a coding mode of chromosome; (2) initializing the populations; (3) solving a D2D user number in normal communication in a cell after the scene change, and setting the D2D user number as a fitness function of the genetic algorithm; (4) performing reproductive process on each population, wherein each reproduction of one generation comprises four steps of selecting, crossing, variating and modifying; (5) introducing an immigration operator, and introducing the optimal individual of each population in the evolutionary process into other populations at fixed time; (6) introducing an essence population; and (7) stopping the algorithm when the number of the reproductive generation is iterated to satisfy an end condition, namely achieving the least maintained generation number of the optimal individual. The transmitting power of a mobile terminal can be effectively lowered in the premise of satisfying the user service quality, thereby realizing the fast scene change.

Description

technical field [0001] The present invention relates to the research on the problem of D2D communication spectrum resource allocation in LTE network, in particular to a resource allocation method of D2D communication system based on multi-population genetic algorithm. Background technique [0002] With the rapid development of modern communication technology, people's demand for wireless data is increasing rapidly. The frequency band used for wireless communication is a precious and scarce resource, and the higher frequency band used for communication is becoming increasingly tense. D2D technology has emerged as the times require. By multiplexing the spectrum resources of cellular users under the licensed frequency band, the spectrum utilization can be effectively improved. . D2D communication under the authorized frequency band makes the communication quality better, more stable and safer. There are two modes of session establishment for D2D communication, one is centrali...

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while ignoring the number of users who can communicate normally

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