北京交通大学学报2011，Vol.35Issue(3)：11-19,9.
基于QOS升降级的无线单播多播混合带宽资源分配方法
Bandwidth resource assignment scheme based on QoS upgrade/downgrade in wireless unicast and multicast integrated services systems
摘要
Abstract
In an OFDM cellular system with unicast and multicast integrated services, in order to admit more multicast members when the bandwidth resource are all occupied because of heavy load, a scheme of borrowing enough bandwidth based on the channel capacity from unicast multimedia users' smoothly upgrading or downgrading their QoS level within an accepted range is suggested. Maximizing the multicasting members and lowing multicasting handover dropping probability are realized by establishing a QoS upgrading/downgrading model of sub-carriers borrowed and proposed CUpDown-QoS algorithm. Farther on, a bandwidth threshold of dynamic bandwidth borrowing to limit new calls for a satisfied grade of service (GoS) is defined, and the optimized tradeoff of CBP and HDP is achieved by the method of decided the threshold based on the Markov model while the impact of dynamic bandwidth borrowing strategy to the threshold is obtained.关键词
无线通信/QoS升降级/单播/多播/带宽分配Key words
wireless communications/ QoS upgrade-downgrade/ unicast/ multicast/ bandwidth assignment分类
信息技术与安全科学引用本文复制引用
陈月云,谈振辉..基于QOS升降级的无线单播多播混合带宽资源分配方法[J].北京交通大学学报,2011,35(3):11-19,9.基金项目
国家自然科学基金资助项目(60902042) （60902042）
北京市自然科学基金资助项目(4102041) （4102041）
