TCP-AFEC: An adaptive FEC code control for end-to-end bandwidth guarantee
TCP-AFEC: An adaptive FEC code control for end-to-end bandwidth guarantee
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DOI：
10.1109/packet.2007.4397053
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发表时间：
2007-12
期刊：
影响因子：
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通讯作者：
Tomoaki Tsugawa;Norihito Fujita;Takayuki Hama;H. Shimonishi;T. Murase
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文献类型：
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作者：
Tomoaki Tsugawa;Norihito Fujita;Takayuki Hama;H. Shimonishi;T. Murase
最近，TCP经常用于视频流应用。由于TCP拥塞控制被设计为负责变化的网络条件，其发送速率自适应的吞吐量波动的结果，并导致较差的视频质量。为了解决该问题，FEC方案是有用的。由于丢失的数据包可以通过冗余数据包恢复并对TCP隐藏，因此TCP可以保持更高的吞吐量。为了有效地利用FEC方案，必须适当地确定冗余级别，使得冗余分组不会浪费网络带宽。虽然提出了许多动态FEC机制，但这些机制不适合TCP视频流，因为它们不试图满足所需的速率。在本文中，我们提出了一种新的自适应FEC方案称为TCP-AFEC，优化额外的带宽使用的冗余水平。仿真结果表明，该机制在各种网络条件下的性能优于以前的FEC控制方法。
Recently TCP is often used for video streaming applications. Since TCP congestion control is designed to be responsible for varying network conditions, its sending rate adaptation results in throughput fluctuations and leads to poor video quality. To address the problem, a FEC scheme is useful. Since lost packets can be recovered by redundant packets and are concealed from TCP, TCP can maintain higher throughput. To effectively utilize the FEC scheme, the redundancy level has to be appropriately determined so that redundant packets do not waste network bandwidth. Although many dynamic FEC mechanisms are proposed, these mechanisms are not appropriate for TCP video streaming because they do not try to satisfy the required rate. In this paper, we propose a new adaptive FEC scheme called TCP-AFEC that optimizes extra bandwidth usage for the redundancy level. Simulation evaluations show that the proposed mechanism performs better than previous FEC control approaches in various network conditions.