一种基于多无线收发器的无线自组网服务质量保障机制
doi: 10.3724/SP.J.1146.2007.01384
A Multi-radio Based on QoS Guarantee Mechanism for Wireless Ad hoc Networks
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摘要: 为了提高无线自组网的容量，满足多媒体任务的服务质量(QoS)要求，该文引入多无线收发器技术，扩展单接口单信道下的无状态QoS模型SWAN为多接口多信道下的无状态QoS模型MMSWAN。同时，提出一种多接口多信道下的QoS路由协议MMQAODV，通过与MMSWAN的结合，实现了一种跨层的QoS保障机制。模拟试验表明，这种机制有效地提高了多媒体任务的QoS和尽力而为任务的性能，与SWAN相比延迟减少为它的2%~27%左右，提交的尽力而为数据量为它的1.29~3.55倍。Abstract: In order to improve the capacity of wireless Ad hoc networks and satisfy the QoS requirements of multimedia sessions, multi-radio technique is introduced and stateless QoS model in single-interface single-channelSWAN is extended to stateless QoS model in multi-interface multi-channelMMSWAN. At the same time, a multi-interface multi-channel QoS routing protocolMMQAODV is proposed, which is combined with MMSWAN to implement a cross-layer QoS guarantee mechanism. Simulation shows that the mechanism improves QoS of multimedia sessions and performances of best-effort sessions. In comparison with SWAN, end-to-end delay is reduced to its 2%~27% and delivered best-effort data are increased to 1.29~3.55 times of it.
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