IEEE 802.16中冲突的一种解决算法  

A Collision Resolution Algorithm in IEEE 802.16

作　　者：曹路[1] 刘佳[1] 翟懿奎[1] 

机构地区：[1]五邑大学信息学院,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2008年第2期41-45,共5页Journal of Wuyi University(Natural Science Edition)

摘　　要：IEEE 802.16在上行链路采用时分多址接入方式,并引入了按需分配多址接入方式用于资源竞争与预留,这使得各用户站之间存在冲突,导致系统性能下降.论文根据IEEE 802.16协议推荐采用的冲突解决算法,通过合理简化数据帧,分别获得吞吐量、延时与用户数的关系;并通过定义代价函数,获得了系统性能达到最优时,最佳退避窗与用户数的关系.结果显示,当退避窗口值约为用户数的2倍时,系统性能达到最优.IEEE 802.16 adopts the TDMA （Time-Division Multiple Access） in uplink layer and introduces the DAMA （Demand Assignment Multiple Access） at the same time for the contention-based reservation of resource. Thus, there are contentions and collisions between SSs （Subscriber Stations） and the performance inevitably deteriorates, In the paper, according to the collision resolution algorithm recommended by IEEE 802.16 to resolve collision, we get the throughout, delay and the number of users by streamlining the frame structure. Also, we get the optimal contention period according to the numbers of users when the system is in the optimal performance by defining the cost function. The result shows that the optimal contention period is about two times the numbers of users,

关 键 词：IEEE 802.16 退避算法 最佳退避窗 

分 类 号：TN914.63[电子电信—通信与信息系统]