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分析了切换优先级算法中发起呼叫排队的可行性和具体算法流程 ,并比较了使用发起呼叫以排队前后的切换算法的性能改善。一般的文献里都没有对始发呼叫加以排队 ,但实际上用户为了接通一个呼叫总是会等待一段时间 ,这就给了始发呼叫排队的可能。提出了一种符合实际的丢失呼叫限制等待 (LCLW)模型 ,给出了它的流程图并将其应用到混合切换优先级算法中。最后分析了在多业务蜂窝系统中发起呼叫排队对切换指标的性能改善 ,并加以模拟。从模拟结果中可以看出发起呼叫排队后算法性能得到了较好的改善 ,呼叫阻塞率大大降低 ,而且对切换阻塞率并无大的影响。
The feasibility of initiating call queuing and the specific algorithm flow in the handover priority algorithm are analyzed. The performance improvement of the handover algorithm before and after using the originating call to queue is compared. In the general literature, there is no queuing of originating calls, but in fact, the user always waits for a period of time to connect to a call, which gives the possibility of queuing originating calls. A realistic Lost Call Restriction Wait (LCLW) model is proposed, and its flow chart is given and applied to the hybrid handover priority algorithm. Finally, the performance improvement of handoff index in initiating call queuing in multi-service cellular system is analyzed and simulated. From the simulation results, it can be seen that the performance of the algorithm has been improved after the queuing is initiated, the call blocking rate is greatly reduced, and the blocking probability is not greatly affected.