Wlan Of Channel Assignment Based On Signal-to-interfercence Ratio

In the past, for example in the office environment, hotel, family SOHO,network layout is very difficult, because it want to decorate a lot of cables.And now, the wireless network can well solve the above problems, provide the perfect solution, wireless network begin large-scale recognized by people, implement the large-scale commercial soon.With the development of wireless equipment prices is more and more lower, making the wireless network is developing rapidly. In recent years, due to the mobile communication users, the non voice services continue to increase rapidly, the line of sight of people is not only closely on the voice business but now focus on multimedia business, requirements for high-speed data communications services has become more and more urgent.With the development of WLAN,it has been widely used in the field of mobile devices.WLAN has become an important part in the field of communication base.Due to the continuous improvement of people’s demand for mobile communications, these years such as airports, hotels, large shopping center,and intensive area of people are provided wireless access services. It Hope to break the regional and the objective conditions of limitation. Anyone can be implemented at any time in any places with anyone in any way to communication.To effective use of limited frequency resources,It is a problem that urgent needed to solve.In this paper the wireless local area network of channel allocation algorithm to do some research.Channel allocation of wireless local area network is a key feature of the mobile communication system, which will directly affect the performance and capacity of wireless local area network communication system and the user experience.Wireless local area network because of its low cost, easy maintenance, self organization and wide coverage of the various advantages,it become the hot research topic in the wireless network.Based on the paper on these problems inherent in the area,WLAN are analyzed, and puts forward some new improved algorithm. Research mainly in the process of channel allocation, the introduction of simulated annealing algorithm based on maximum signal interference ratio, using the model to evaluate the quality of communication link, according to the assessment flow and interfere with the priority of creating node and link, respectively, based on the priority, and ascension of the whole network throughput effectively.Matlab experiment results show that: Based on SIR of channel allocation can rational use of wireless spectrum resources, and improve the performance of the system.