基于战术数据链的应用背景，针对传统轮询协议信道利用率低以及无法满足紧急情况下的实时通信需求等不足，提出了一种自适应轮询MAC协议(APMP)。通过基于贝叶斯估计的轮询调度算法，APMP能够自适应地以高选择指数选择具有较多高优先级报文的节点进行轮询，进而提高信道利用率和提供业务区分服务。同时，APMP还能适应网络拓扑结构的动态变化，较好地解决了节点超出网控站覆盖范围而造成的空轮询问题。仿真表明，相比较于现有典型战术数据链集中式轮询协议，APMP可以更加有效地利用无线信道资源，具有较好的性能表现。
Abstract
Considering the application background of tactical data link, an adaptive polling MAC proto?col (APMP) was proposed to overcome shortcomings such as low channel utilization ratio, being unable to meet the demand of real-time communication in emergency situations. With the bayesian-estima- tion-based polling scheduling algorithm, APMP can adaptively select the nodes with more high-priority packets to poll by a high selection index, to increase the channel utilization ratio and provide differenti?ated services. At the same time, APMP can adapt to the dynamic changes of network topology, and solve the empty polling problem caused by the node beyond scope of coverage of the network control station. The simulated results show that, compared with the existing centralized polling protocol of the typical tactical data link, APMP can use radio channel resources efficiently, and has good perfor?mance.
关键词
通信技术 /
战术数据链系统 /
媒体接入控制 /
轮询 /
贝叶斯估计 /
OPNET
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Key words
communication technique /
tactical data link system /
media access control /
polling /
Bayesian estimation /
OPNET
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基金
总装备部“十一五”预先研究项目(513040205)
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