基于QBD模型的混合信道分配技术研究  

Performance Analysis of Hybrid Channel Allocation Technology Based on QBD Model

作　　者：闫利超[1] 王丹[1] 朱锦景 

机构地区：[1]郑州航空工业管理学院,郑州450000 [2]中国移动杭州分公司,富阳311400

出　　处：《重庆科技学院学报（自然科学版）》2009年第5期119-123,135,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国防科技重点实验室航空基金项目(20085155008)

摘　　要：混合信道分配技术兼有固定信道分配技术和动态信道分配技术的优点。为提高信道资源利用率,通过建立拟生灭过程的数学模型,选择切换保留混合优先级算法,然后通过模型平稳分布的求解得出性能指标的数学表达式,通过仿真对其性能进行比较。结果表明混合信道分配略差于动态信道分配,但优于固定信道分配。Hybrid Channel Allocation（HCA） which is a compromise has the virtue of Fixed Channel Allocation（FCA） and Dynamic Channel Allocation（DCA）.In order to improve the efficiency of channel utilization,this article constructs models of the three channel allocation strategies based on Quasi Birth and Death process（QBD） during which we select the hybrid priority handoff reservation algorithm.We derive the mathematical expressions of key performance indicators,such as Call Blocking Probability.Simulation and comparisons of the performance among FCA, DCA and HCA are given. The results show that HCA has a little worse performance than DCA, but much better than FCA.

关 键 词：固定信道分配 动态信道分配 混合信道分配 QBD过程 性能分析 

分 类 号：TN911[电子电信—通信与信息系统]