Reliable multicast via satellites

G. Cao, Yiqiong Wu
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引用次数: 10

Abstract

Automatic repeat request (ARQ) is a well-known technique to provide error control. In reliable satellite multicasting, ARQ may reduce system throughput as the number of receivers increases since the satellite has to retransmit a packer until all receivers correctly receive it. This performance degradation might be alleviated substantially by conducting retransmissions through terrestrial paths from the sender to each receiver instead of through the multicast satellite link. However, this approach may not be possible when some receivers do not have terrestrial connections to the sender. Also, a large volume of feedback traffic from the receivers to the sender may cause a feedback implosion at the sender. In this paper, we propose a scalable framework to solve these problems. Our solution enables receivers to form groups to avoid unnecessary retransmissions as long as a correct packet call be found inside the group. Using analytical models, we demonstrate that the proposed solution can significantly improve system throughput.
通过卫星进行可靠的多播
自动重复请求(ARQ)是一种众所周知的提供错误控制的技术。在可靠的卫星多播中,随着接收机数量的增加,ARQ可能会降低系统吞吐量,因为卫星必须重新发送一个封隔器,直到所有接收机都正确接收到它。通过从发送方到每个接收方的地面路径而不是通过多播卫星链路进行重传,可以大大减轻这种性能下降。然而,当一些接收器与发送方没有地面连接时,这种方法可能不可行。此外,从接收方到发送方的大量反馈流量可能会导致发送方的反馈内爆。在本文中,我们提出了一个可扩展的框架来解决这些问题。我们的解决方案允许接收器组成组,只要在组内找到正确的数据包调用,就可以避免不必要的重传。利用分析模型,我们证明了所提出的解决方案可以显著提高系统吞吐量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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