With fca , the channel - reuse pattern can be optimized and the management of channel assignment to a mobile terminal is simplified . however , such a scheme cannot accommodate fluctuating traffic in a cell : when the traffic increases , the packet delay may increase to a undesirable level , or even been blocked 较之传统的语音业务来说,数据业务的分布非常不均匀并且更具突发性,这使得即使是在第三代系统中,尽管系统容量有了较大的提升,但在通信的高峰时期,阻塞的情况仍然有可能在某些小区内发生。
Besides the traditional speech service , the future mobile communicaiotn system can also provide other services , such as low / high rate data , video etc . heterogeneous services have different quality of service ( qos ) requirements , for example , the requirements of maximum packet delay , the maximum acceptable packet drop rate , the minmum data rate 随着移动通信技术的飞速发展,移动用户数急剧增加,通信系统容量不断加大,所支持的业务类型除了传统的语音业务外,还包括低/高速数据、图象等数据业务。不同的业务具有不同的服务质量( qos )要求,如对分组时延、最大可接受的丢包率、最小数据速率的要求都各不相同。
Similar to asama protocol , qasama protocol applies ppo and go algorithm , but qasama protocol also considers the requirements of packet delay , packet drop rate , bit error rate ( ber ) , traffic capacity and channel utilization , and integrates these requirements into the slot allocation procedure 在qasama协议中,综合考虑了分组时延,分组丢弃率,误码率,业务容量以及信道利用率方面的要求,并将这些要求与多波束智能天线的特点及自适应时隙分配过程有机地结合起来。