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 ,还能获得低的系统呼叫阻塞率 Aiming at the unbalanced business in CDMA cellular system, a call admission control scheme is proposed in this paper. Some resources are reserved for the upcoming calls in the heavily loaded cell. The reserved size is adaptively adjusted according to the call blocking condition . The simulation results show that the proposed scheme can solve the problem of unbalanced services well and has lower system call blocking rate than call admission control scheme based on fixed resource reservation