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为充分利用卫星通信系统的链路资源,针对卫星异步传递模式(ATM)网络的特点,在链路资源按需分配(DA)协议的控制论模型基础上,研究了该协议对业务统计特性的影响,并且基于跨层设计的思路提出了一个结合媒介访问控制层DA协议的接纳控制算法。分析与仿真结果表明:该算法与不考虑DA协议的接纳算法相比,在一定的接纳门限范围内能够接纳更多的连接。该算法增加了网络的业务接纳率,提高了卫星链路资源的利用率。
In order to make full use of the link resources of satellite communication system, this paper studies the control theory model of Link Resource On Demand (DA) protocol for the characteristics of Satellite Asynchronous Transfer Mode (ATM) network. Influence, and based on the idea of cross-layer design proposed a media access control layer DA protocol admission control algorithm. The analysis and simulation results show that the proposed algorithm can admit more connections within a certain threshold of admission compared with the admission algorithm which does not consider the DA protocol. The algorithm increases the service acceptance rate of the network and improves the utilization rate of satellite link resources.