摘要： 针对在可移动边界保护信道方法中新呼叫堵塞率高的问题，提出一种呼叫接入控制策略。当切换呼叫的掉话率小于门限时，新呼叫以一定的概率使用为切换呼叫预留的保护信道。当高优先级数据等待队列中的数据包为空时，传输普通数据等待队列中的数据包。仿真结果表明，在对切换呼叫掉话率影响较小的前提下，该策略能够有效降低新呼叫的堵塞率和高优先级数据的掉包率。

关键词: 排队理论, 信道分配, 呼叫接入控制, 优先级, 马尔科夫过程

Abstract: Aiming at the problem of high call blocking rate in Movable Boundary and Guard Channel(MBGC) method, this paper presents a novel call admission control algorithm. The strategy is that the new call users can use the guard channel reserved for the handoff call users with a certain probability when the handoff call dropping rate is less than a threshold. The scheme also takes into account the priority of different data types, and only when the data packet in high-priority data queue is empty, the data packets in general data queue can be transmitted. Simulation results show that, in case of affecting dropped call rate of handoff calls smaller, it can effectively reduce the new call blocking rate and high-priority data blocking rate.

Key words: queuing theory, channel allocation, call admission control, priority, Markov process

中图分类号: 

• TN91