On the impact of delay constraint on the multicast outage in wireless fading environment
On the impact of delay constraint on the multicast outage in wireless fading environment
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DOI：
10.1109/icc.2015.7248902
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
M. Khoshkholgh;K. Navaie;K. Shin;C. Liu;Yongguang Zhang;Victor C. M. Leung;S. Gjessing
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文献类型：
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作者：
M. Khoshkholgh;K. Navaie;K. Shin;C. Liu;Yongguang Zhang;Victor C. M. Leung;S. Gjessing
在本文中，我们研究单跳组播传输，其中随机定位多个发送器组播数据包到一个集群的接收器。分组重传被认为是一种很有前途的提高传输可靠性的机制。我们的重点是评估（i）建立无中断多播所需的最小延迟（重传尝试）τ*，其中传输的数据包被集群中的整个节点成功解码，以及（ii）给定延迟约束的多播进度半径（MPR）。MPR指示在限制重传延迟的情况下，数据包在集群中平均可以成功前进多远而不会中断。假设一般的衰落分布，我们推导出τ* 和MPR的累积分布函数的封闭形式的表达式。通过仿真，我们证实了我们的分析，并研究了几个系统参数对MPR的影响。基于本文的结果，我们得出结论，无中断组播需要非常大量的重传尝试，因此实际上是无法实现的，只基于重传。
In this paper we investigate single-hop multicast transmission in which randomly located multiple transmitters multicast packets to a cluster of receivers. Packet retransmission is known as a promising mechanism for improving the transmission reliability. Our focus is on evaluating (i) the minimum required delay (retransmission attempts), τ*, for establishing an outage-free multicast, where a transmitted packet is successfully decoded by entire nodes in the cluster, and (ii) Multicast Progress Radius (MPR) for a given delay constraint. MPR indicates how far, on average, a packet can successfully progress in a cluster without outage while the retransmission delay is restricted. Assuming general fading distribution, we derive closed-form expressions for the cumulative distribution function of τ*, and MPR. By simulations we confirmed our analysis and studied the impact of several system parameters on the MPR. Based on results of this paper we conclude that outage-free multicast requires a very large number of retransmission attempts, thus not practically achievable only based on retransmission.