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

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.