| 适用于无线网络流媒体传输的可靠多播协议设计 |
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| 引用本文： | 韩莉,钱焕延.适用于无线网络流媒体传输的可靠多播协议设计[J].计算机科学,2010,37(9):124-126. |
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| 作者姓名： | 韩莉 钱焕延 |
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| 作者单位： | 1. 南京理工大学计算机科学与技术学院,南京210094;安徽大学计算机科学与技术学院,合肥230039
2. 南京理工大学计算机科学与技术学院,南京,210094 |
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| 基金项目： | 安徽省教育厅重点科研项目 |
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| 摘 要： | 无线网络具有高误码率和高丢失率的特点,现有的组播协议无法为具有时延敏感特点的流媒体应用提供理想的传输质量.将FEC编码与基于NACK的反馈机制相结合,提出了一种以端到端方式运作的轻量级可靠传输协议.协议应用NACK抑制和NACK积累机制防止NACK风暴;引入了TCP友好的拥塞控制机制,与其他传输协议公平共享带宽;使用反馈轮(feedback round)机制,以"轮"为单位实现NACK控制,将接收端等待修复的时间平均到每一轮中,防止了抖动.实验表明,在最大发送速率为2Mbps的设定下,本协议在无线网络上的吞吐量是同类协议NORM的1.5倍,且消除了抖动,具有低延迟的特点,更适合于流媒体传输应用的需要.
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| 关 键 词： | 反馈轮 无线网络 流媒体 |
NACK-oriented Reliable Multicast Transport Protocol for Live Streaming over Wireless Channel |
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| HAN Li,QIAN Huan-yan.NACK-oriented Reliable Multicast Transport Protocol for Live Streaming over Wireless Channel[J].Computer Science,2010,37(9):124-126. |
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| Authors: | HAN Li QIAN Huan-yan |
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| Affiliation: | (School of Computer Science & Technology,Nanjing University of Science& Technology,Nanjing 210094,China);(School of Computer Science and T'echnology,Anhui University,Hefei 230039,China) |
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| Abstract: | For wireless Channels are inherently lossy,it is challengeable to maintain the Qoality of Service(QoS) for live streaming. In this paper, we proposed a well-designed light weighted Negative-ACKnowledgment(NACK) Oriented Reliable Multicast Protocol, which combined the FEC-based repair in its design. This protocol can provide end-to-end rcliable transport of streams over generic IP multicast routing and forwarding services. For less complicated and more efficient implementation, feedback round mechanism is applied in HACK suppression. Experiment results show that our protocol gets much higher performance than NORM. |
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| Keywords: | NACK FEC |
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