Call Admission Control And Simulation System Design Based On Next Ultra High Htroughput Wireless Network

Wireless LANs have become an important part of the wireless broadband Wireless LANs have become an important part of the wireless broadband communications, wireless LAN technology can significantly increase access bandwidth, and reduce the cost of distribution network, the flexibility of access to pricey. Wireless LAN technology allows users to achieve high-speed through a wireless, low- tariff access to the Internet, has shown great vitality and potential applications of communication technology has become one of the most commercially promising. In the next generation of ultra- high-speed wireless local network, the ability of different bandwidth access terminal, the coexistence of the different QoS requirements of the business, making the admission control problem is particularly prominent, through the appropriate admission control algorithm can restrict access and dynamic bandwidth allocation calls to achieve high channel utilization and reduce overall blocking probability and dropping rate of the system, while improving system channel utilization.This article relies on the National High Technology Development Plan(863) major projects-ultra high-speed wireless LAN radio interface key technology research and validation, to achieve a majority agreement NUHT system, including connection management business flow, resource allocation, bandwidth, applications, ARQ, fragmentation and aggregation functions of the MAC service data unit, and to improve the performance of the wireless communication mechanism Pipeline channel simulation.Ultra- high-speed wireless LAN radio interface Based on Key Technology Research and Validation national major projects for the next generation of ultrahigh-speed wireless LAN multi-bandwidth access capabilities, concurrent execution of multi-service scenarios proposed in order to improve channel utilization targets, taking into account switching service, under QoS priority factor, as far as possible to achieve similar business fairness admission control algorithms. And the algorithm is theoretically analyzed in the next generation of ultra- high-speed wireless LAN simulation platform for simulation, and the performance comparison. Undertake admission control algorithm, the resource and admission control for fine after allocation, based on channel utilization optimization algorithm, a new secondary allocation mechanism, the first user of particle size on a per-user level allocation priorities in by resource users get traffic redistribution, and finally BE uniform distribution business. Finally, under the Opnet simulation platform based on system-level simulation, and compared with existing algorithms to verify the existing environment, the acceptance of the proposed algorithm in the case of increasing the volume of business, new business and handover blocking probability for business loss probability has decreased more obvious than some existing admission control algorithms, resource allocation algorithm in proportion with the increase of 80 M users, channel utilization tends to increase.