异构蜂窝系统中动态联合呼叫接纳控制算法  

Dynamic joint call admission control algorithm in heterogeneous cellular systems

作　　者：凌毓涛[1] 吴建斌[1] 刘俐利[2] 

机构地区：[1]华中师范大学物理科学与技术学院,武汉430079 [2]华中师范大学国家数字化学习工程技术研究中心,武汉430079

出　　处：《计算机工程与应用》2013年第24期88-92,共5页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61074046/F030107);华中师范大学中央高校基本科研业务研究基金

摘　　要：针对异构蜂窝系统的接纳控制问题,设计了一种动态联合呼叫接纳控制算法。该算法采取TOPSIS法选择最优接入网,根据系统负载分布情况动态调整网络资费,对用户的接入选择决策施加影响,以均衡网络间负载;针对不同的呼叫优先级,采取多级接入阈值及动态带宽分配策略,在接入控制环节进一步改善系统性能及用户体验。仿真结果表明,该算法在重视用户偏好的同时实现了负载均衡,降低了呼叫阻塞率和掉线率。A dynamic joint call admission control algorithm is designed aiming at the admission control problem in heterogeneous cellular systems. This algorithm adopts TOPSIS method to select the optimal access network and adjusts network cost dynamically according to the system＇ s load distribution, thus balances the load between networks by influencing the user＇ s access selection decision-making. Also, a multi-level access threshold and dynamic bandwidth allocation strategy is adopted for different call pri- orities to further improve system performance and user experience in the stage of access control. Simulation results show that the algorithm pays attention to the user preferences while achieving load balancing, reducing the call blocking probability and dropping rate.

关 键 词：异构蜂窝系统 联合呼叫接纳控制 负载均衡 带宽分配 

分 类 号：TN929.52[电子电信—通信与信息系统]