Impact of 4G wireless link configurations on VoIP network performance

2008 IEEE International Symposium on Wireless Communication Systems Pub Date : 2008-12-30 DOI:10.1109/ISWCS.2008.4726148

Stefan Alfredsson, A. Brunström, M. Sternad

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引用次数: 5

Abstract

The performance of applications in wireless networks is partly dependent upon the link configuration. Link characteristics varies with frame retransmission persistency, link frame retransmission delay, adaptive modulation strategies, coding, and more. The link configuration and channel conditions can lead to packet loss, delay and delay variations, which impact different applications in different ways. A bulk transfer application may tolerate delays to a large extent, while packet loss is undesirable. On the other hand, real-time interactive applications are sensitive to delay and delay variations, but may tolerate packet loss to a certain extent. This paper contributes a study of the effect of link frame retransmission persistency and delay on packet loss and latency for real-time interactive applications. The results indicate that a reliable retransmission mechanism with fast link retransmissions in the range of 2-8 ms is sufficient to provide an upper delay bound of 50 ms over the wireless link, which is well within the delay budget of voice over IP applications.

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4G无线链路配置对VoIP网络性能的影响

无线网络中应用程序的性能部分取决于链路配置。链路特性随帧重传持久性、链路帧重传延迟、自适应调制策略、编码等而变化。链路配置和通道条件可能导致丢包、延迟和延迟变化，这会以不同的方式影响不同的应用程序。批量传输应用程序可以在很大程度上容忍延迟，而不希望出现数据包丢失。另一方面，实时交互应用程序对延迟和延迟变化很敏感，但可以在一定程度上容忍丢包。本文研究了实时交互应用中链路帧重传持久性和时延对丢包和时延的影响。结果表明，一个可靠的重传机制，在2-8 ms范围内的快速链路重传足以在无线链路上提供50 ms的上限延迟界限，这完全在IP语音应用的延迟预算之内。

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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来源期刊

2008 IEEE International Symposium on Wireless Communication Systems

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