不平衡业务下CDMA蜂窝系统的呼叫接入控制方案  

A Call Admission Control Scheme in CDMA Cellular System with Non-uniform Traffic Distribution

作　　者：胡丹[1] 段正华[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《无线通信技术》2004年第2期12-15,共4页Wireless Communication Technology

摘　　要：针对 CDMA蜂窝系统区间业务不平衡的情况 ,文中提出了一种呼叫接入控制方案 ,在重负荷小区为邻区即将到来的呼叫预留部分资源 ,预留的大小随呼叫阻塞情况自适应地调整。仿真结果显示 :该方案能很好地解决区间业务不平衡的问题 ,而且与基于固定资源预留的呼叫接入控制方案相比 。The paper proposes a call admission control(CAC) scheme for CDMA cellular systems with non-uniform traffic distribution among cells. The proposed CAC scheme reserves some portion of the system resource in the heavily loaded cells for upcoming calls occurring in neighbor cells. The proportion of reserved resource can be adaptively adjusted according to the call blocking state. Simulations results show that the scheme can resolve the inter-cell unbalanced traffic problem. Comparing with fixed resource reserved CAC, the call blocking rate of the proposed scheme is lower.

关 键 词：不平衡业务 CDMA 蜂窝系统 呼叫接入控制 资源预留 呼叫阻塞率 服务质量 

分 类 号：TN929.53[电子电信—通信与信息系统]