Research On WLAN Distributed Dynamic Channel Allocation Algorithm

With the development of WLAN technology, it has been widely used in mobile devices. In order to meet the needs of mobile devices, in crowded areas such as airports, hotels, shopping malls, etc. wireless access services are provided over these years. Due to competition, different operators provide respective WLAN access services in hot spot areas, resulting in a high degree of overlap in the wireless signal coverage area. WLAN network is usually based on AC (Access Controller, Wireless Access Controller)+Fit AP (Access Point, wireless access points) architecture, in which an AC manages a large number of APs. As the large number and high-density multi-covering of APs, the jurisdiction of AC for AP configuration and management process will become very complicated. With the increase in the number of AP, the existing dynamic channel allocation scheme exists with the phenomenon of channel allocation adjustment time rapidly growing in the actual scene, which is a bottleneck restricting WLAN network scale. Development of distributed technologies provides technical assurance for solving the above problem. Distributed device, with its powerful load capacity and computational efficiency, will become an important tool for the future of wireless solutions. However, dynamic channel allocation solution on a distributed device has not been subsequently improved.In this paper, a new dynamic channel allocation algorithm in the distributed environment is implemented through the improvement of dynamic channel allocation algorithm in the process of radio frequency management. By using graph theory, the relationship from the perspective of network topology between AP is explored, and drawing on experience from the concept of network community division of science, the CNM algorithm is used to divide the wireless network. Different packets distributed into the distributed devices to allocate channel by the network division, thus reducing the channel allocation time. Improved dynamic channel allocation algorithm simulates on the network simulation platform NS2to verify the effectiveness and efficiency of the algorithm. By comparison with the original algorithm, we can clearly see that the performance has been enhanced.