MPMTP: Multipath Multimedia Transport Protocol using Systematic Raptor Codes over Wireless Networks
MPMTP: Multipath Multimedia Transport Protocol using Systematic Raptor Codes over Wireless Networks
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DOI：
10.1109/tmc.2014.2364042
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发表时间：
2015-09
影响因子：
7.9
通讯作者：
O. C. Kwon;Yunmin Go;Yongseok Park;Hwangjun Song
中科院分区：
文献类型：
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作者：
O. C. Kwon;Yunmin Go;Yongseok Park;Hwangjun Song
提出了一种利用异质无线网络路径分集的多路径多媒体传输协议(MPMTP)。MPMTP的目标是通过同时使用多个无线网络来提供无缝的高质量视频流服务。在MPMTP中，采用系统Raptor编码来缓解无线信道差错引起的视频质量下降以及缓解多径环境中的队头阻塞问题，并且其编码参数(如码率、符号大小和源码元数)是通过考虑无线信道状态、Raptor编解码复杂度和接收器缓冲区占用来动态确定的。此外，MPMTP执行分组调度时不仅考虑了无线网络条件，还考虑了分组有效载荷特性以实现流畅的视频回放。提出的MPMTP在Linux内核中完全实现，并在真实的无线网络环境中进行了测试。
This paper presents a multipath multimedia transport protocol (MPMTP), which exploits path diversity over heterogeneous wireless networks. The goal of MPMTP is to provide a seamless high-quality video streaming service by using multiple wireless networks simultaneously. In MPMTP, systematic Raptor codes are adopted to mitigate video quality degradation caused by wireless channel errors as well as to alleviate a head-of-line blocking problem in multipath environments, and their encoding parameters such as code rate, symbol size, and the number of source symbols are determined on the fly by considering the wireless channel state, Raptor encoding and decoding complexity, and receiver buffer occupancy. Furthermore, MPMTP performs packet scheduling considering not only wireless network conditions but also packet payload characteristics for smooth video playback. The proposed MPMTP is fully implemented in a Linux kernel and examined over real wireless network environments.