摘要
通过半解析方法预测和系统标准仿真两种方式,对基于高速上行分组接入(HSUPA)的VoIP系统性能进行了研究。采用非调度算法、混合自动重传请求(HARQ)和软切换技术,降低了用户设备(UE)的功率,提高系统的容量。同时,鉴于VoIP业务对时间的敏感性,需在HARQ的最大重发次数和延迟预算之间取折中,以实现容量的最优化。结果显示,在VoIP中引入HSUPA后,容量比采用物理信道(DCH)的R99版本增加了12.2kbit/s。
In this paper, the system performance of VoIP on HSUPA is studied by the semi-analytical prediction and the system level simulations. The non-scheduled algorithm,HARQ and soft handover can be expected to lower the required UE power and increase the system capacity. Due to the time sensitivity of VoIP service, a trade off between the maximum number of HARQ retransmissions and the delay budget can be made to optimize the capacity of VoIP on HSUPA. The results show the capacity of VoIP over HSUPA gains 12.2kbps more than that on DCH in Re199.
出处
《现代电信科技》
2008年第2期53-57,共5页
Modern Science & Technology of Telecommunications
