无线通信网络呼叫接纳控制策略研究综述

呼叫接纳控制（CAC）是无线通信网络无线资源管理中一个重要的组成部分，CAC策略依据一定的准则决定呼叫到达请求的允许接入或拒绝接入，其中策略设计的好坏直接影响着网络的性能和资源利用率。20多年来，CAC策略得到了广泛地研究，极大地改善了网络呼损率、中断率、分组延时、丢包率和吞吐率等性能。简要介绍了无线通信网络中与CAC的一些相关背景及CAC策略的功能定位与作用，重点介绍了近年来CAC研究的一些新的成果，并分析了这些成果仍然存在的一些问题，最后给出了对于CAC进一步研究的探讨。

Overview on call admission control schemes in wireless communication networks

Call Admission Control(CAC) plays an important part in radio resource management in wireless communication networks.It permits or denies the call arrival connection requests based on the certain criteria.The design of CAC has direct impact on the network performance and resource unitization.CAC schemes have been widely investigated during the last two decades,which greatly improves the network performances,such as call blocking and dropping probabilities,packet delay,loss rate,and throughput.Related background knowledge about CAC in wireless communication networks and its requirements and functions were introduced.Some recent research results on CAC schemes were outlined with great emphasis.The problems or drawbacks in current schemes were pointed out.Finally,ideas for further research were discussed.