计算机科学 ›› 2018, Vol. 45 ›› Issue (10): 83-88.doi: 10.11896/j.issn.1002-137X.2018.10.016
李灵俐1,2, 白光伟1, 沈航1,3, 王天荆1
LI Ling-li1,2, BAI Guang-wei1, SHEN Hang1,3, WANG Tian-jing1
摘要: 认知无线电传感器网络中信道的可变性使得多媒体数据传输面临着巨大考验,在主要用户的干扰下如何让数据实时传输到汇聚节点是许多研究者正在研究的问题。文中提出一种基于簇的认知多媒体传感器网络实时路由协议,该协议通过对主要用户活动时间的预测获得信道的预期可用时间,并选择合适的信道进行数据传输;同时考虑可靠性指标,将数据丢失概率控制在合理的范围内,使得数据可以在规定的时间内可靠地传输到目的地;在选择下一跳节点时,除了考虑距离问题,还兼顾了信道的可用时间问题,尽可能地减少数据的传输时间。仿真结果表明,CBRTR可以均衡节点能耗,延长网络的生命周期,实现数据的实时、可靠传输。
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