Joint DAMA-TCP protocol optimization through multiple cross layer interactions in DVB RCS scenario

M. Luglio, F. Zampognaro, T. Morell, F. Vieira
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引用次数: 12

Abstract

Two aspects of DVB-RCS standard can worsen performance of TCP data connections: DAMA access scheme, since it introduces additional and variable delay to the already significant propagation delay and the adoption of Adaptive Coding on the return link to maximize bandwidth efficiency to face variable weather conditions, because it results in variable bandwidth allocation. Both aspects can severely impact TCP performance, especially for what concerns flow adaptation to varying channel conditions and channel usage efficiency. To optimize performance, in this paper cross-layer signaling among transport, MAC and physical layers of a DVB-RCS system is addressed. In particular MAC-TCP cross-layer is analyzed through the use of NS2 network simulator, showing the possible benefit in a DVB-RCS scenario.
DVB RCS场景下多重跨层交互的DAMA-TCP联合协议优化
DVB-RCS标准的两个方面会使TCP数据连接的性能恶化:DAMA接入方案,因为它在已经很大的传播延迟上引入了额外的可变延迟;在返回链路上采用自适应编码,以最大限度地提高带宽效率,以面对多变的天气条件,因为它导致了可变的带宽分配。这两个方面都会严重影响TCP性能,特别是涉及到对不同通道条件的流适应和通道使用效率的方面。为了优化性能,本文研究了DVB-RCS系统的传输层、MAC层和物理层之间的跨层信令问题。特别地,通过使用NS2网络模拟器分析了MAC-TCP跨层,显示了在DVB-RCS场景中可能的好处。
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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