数字广播和移动通信融合网络的性能分析

Performance Analysis of the Convergent Networks of Digital Broadcast and Mobile Communication

为了合理利用由数字广播网(如DVB-T/H)和移动通信网(如GPRS/UMTS)组成的融合网络,均衡融合网络流量,搭建了一个系统排队模型。并在其中引入增益因子G以量化广播网模型的广播特性.以端到端用户请求阻塞率作为性能指标,评估队长、用户请求速率、用户请求概率判决门限等不同参数对融合网络的影响,并仿真分析了广播特性给融合网络带来的优势以及在不同用户请求到达率情况下如何合理使用融合网络.

In order to utilize the convergent networks of broadcast network （such as DVB-T/H） and mobile network （such as GPRS/UMTS） properly and balance the traffic between the two different networks, a system queuing model is proposed and a gain parameter G is introduced to quantify the broadcasting ability of the broadcast network. The performance measures of the end-to-end user request blocking probability is obtained. The impact of the parameters of queue length, user request arrival rate and the decision threshold of user request probability are evaluated. The benefits of the convergent network and how to use convergent network in an efficient way under different user request arrival rate are demonstrated through the simulation.