CAJ | 학술논문

无线传感器网络基于睡眠调度机制的MAC协议存在传输延迟较大的缺点.针对现有的解决方案多只适用于低负载环境的局限性,提出了一种改进方案- HMAC.通过使用两个调度帧,HMAC可在一个周期内实现高效多跳传输,同时保证恶劣链路条件不会影响下游节点.理论分析和仿真实验表明,与S-MAC和RMAC相比,采用该协议可以在重负载下有效提高能量利用率,并降低传输延迟.
무선전감기망락기우수면조도궤제적MAC협의존재전수연지교대적결점.침대현유적해결방안다지괄용우저부재배경적국한성,제출료일충개진방안- HMAC.통과사용량개조도정,HMAC가재일개주기내실현고효다도전수,동시보증악렬련로조건불회영향하유절점.이론분석화방진실험표명,여S-MAC화RMAC상비,채용해협의가이재중부재하유효제고능량이용솔,병강저전수연지.
Duty-cycle MAC protocols widely used in wireless sensor networks lead to extra end-to-end delivery latency, while the existing solutions, such as RMAC (the Routing enhanced MAC protocol), are only applicable to light-load traffic. A new MAC protocol called HMAC is proposed, which avoids the unnecessary energy consumption caused by loss events without sacrificing the performance of packet delivery latency. By using two scheduling frames, HMAC realizes efficient multihop packet delivery in a single cycle, and ensures that bad link conditions do not impact the downstream nodes. Compared with S-MAC and RMAC, it is shown that HMAC outperforms these protocols in a heavy-load traffic scenario, with higher energy efficiency and lower delivery latency.