摘要
针对物理层提供的多速率传输特性,研究了最小化多播延迟的问题。其主要思想是上游节点将对数据包的一次低传输速率广播换成若干次传输速率不同的广播,达到最小化多播延迟的目标。首先将该问题模型化为一个最优化问题,然后提出了一个分布式最小化延迟的多播路由DMDMR算法,并且证明了该算法能够取得最优值。大量模拟实验结果表明,与上游节点对数据包只进行一次广播的经典技术相比,DMDMR算法可降低多播延迟17%以上。
According to the multi-rate capacity at PHY layer, the optimal multicast delay in multi-hop wireless networks was studied. The main idea is replacing a lower rate transmission of upstream node with some transmissions to minimizing the multicast delay. Firstly, this problem was formulated as an optimization problem. Moreover, a DMDMR algorithm was proposed and proved to be an optimal algorithm. The simulation results show that DMDMR algorithm can decrease more than 17% the multicast delay than the classic technique that the upstream node broadcast a packet only once.
出处
《系统仿真学报》
EI
CAS
CSCD
北大核心
2008年第24期6707-6709,6713,共4页
Journal of System Simulation
基金
合肥工业大学科学研究发展基金(081005F
061005F)
安徽省高校青年教师资助计划(2008jq1005)
合肥工业大学博士专项基金(2007GDBJ027)
关键词
多速率
多播
延迟
无线多跳网络
rnultirate
multicast
delay
multi-hop wireless networks
