【摘要】 无线网络是用户自由获得多种服务的主要方式,而无线网络的准入控制方法是保证各种业务的QoS以及无线信道的利用率的关键因素。利用多维Markov过程研究了业务带宽需求时变的状况下基于QoS的多业务准入控制的性能(掉线概率、阻塞概率、信道利用率),通过数值结果比较了无准入控制下和基于预约的准入控制方法的性能。更多还原

【Abstract】 A wireless network is the main means by which users freely get their different service.Call admission control is critical to guarantee the services QoS and utility of wireless channel.In this paper,the performance of QoSbased call admission control scheme is evaluated using a multiple dimension Markov process model under the condition that the bandwidth requirement of a call is timevarying in wireless networks.Then,by the results of numerical example,two schemes including no CAC,reservation based CAC are compared according to three performance measures (call blocking probability,call dropping probability and channel utilization).更多还原