基于效用函数的LEO卫星移动通信系统波束切换  

Spotbeam handover scheme for LEO satellite mobile communication systems by using utility function

作　　者：董燕[1] 黄琳[1] 汪小燕[1] 黄载禄[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2008年第5期5-8,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50305008);总装备部预研基金资助项目(51421010103JB3801)

摘　　要：针对提供多种业务的LEO卫星移动通信系统,考虑不同的业务类型和呼叫类型,定义了基于效用函数的系统用户满意度,并用其度量系统服务质量;以最大化系统用户满意度为准则,给出了波束切换策略,建立了有约束的非线性规划模型;该模型的求解结果决定了是否接受一个切换呼叫.仿真结果表明该策略在保证系统服务质量要求的同时,有效地降低了波束小区的切换掉话率,并且算法简单、信令负荷小.In service util satisfaction degree was ity functions, the types of services and calls would be considered. The system defined to represent the quality of service in multiple services low earth orbit （LEO） satellite mobile communication systems. The system satisfaction degree was maximized by the proposed spotbeam handoff scheme when the processes handoff was called. The bandwidth allocation for a handoff call was formulated as a constrained nonlinear optimization problem. The Simulation was outlined and the conformance to quality of service （QoS） parameters for the proposed approach was verified.

关 键 词：卫星移动通信 波束切换 效用函数 非线性规划 掉话率 阻塞率 

分 类 号：TN927[电子电信—通信与信息系统]