摘要
实时性是无线多媒体传感器网络的重要考虑因素之一,而MAC协议能否高效地使用无线信道对保障无线多媒体传感器网络的实时性起着决定性作用。针对无线多媒体传感器网络的业务数据特点,提出了一种基于时隙预留的多信道实时MAC协议。该协议在响应流媒体查询之前,事先建立一条从源节点到汇聚节点的时隙预留流路径,从而最小化数据包在每一次转发时的信道接入时延。仿真结果表明,该协议明显减小了流媒体数据的端到端时延与时延抖动,并且具有较好的能量有效性。
Timeliness is one of the most important considerations in wireless multimedia sensor networks（WMSN）,and whether the MAC protocol can efficiently use the radio channel plays a decisive role in guaranteeing timeliness of WMSN.According to the data features of the wireless multimedia sensor networks,we proposed a multi-channel real-time MAC protocol based on time slots reservation.The protocol establishes a time slots reservation based flow path from the source node to the convergent node before responding to the streaming media inquiries,thereby it can minimize each channel access delay while transmitting the data package.The simulation results show that the protocol can significantly reduce the end to end delay and the delay dithering of the streaming media data,and it also has better energy efficiency.
出处
《计算机科学》
CSCD
北大核心
2010年第11期81-85,96,共6页
Computer Science
基金
863国家重点基金项目(2008AA01Z219)资助
