基于OpenFlow的SVC流媒体时延自适应分级传输方法

doi:10.3969/j.issn.1000-436x.2013.11.014

摘要/Abstract

摘要：

针对当前互联网流媒体传输的时延敏感性问题，提出一种基于OpenFlow的SVC（scalable video coding，可分级视频编码）流媒体时延自适应分级传输方法，该方法有效结合SVC流媒体可分级和OpenFlow灵活可编程的特性，在网络带宽受限和链路拥塞的复杂网络环境下，通过构建基础层和增强层2个独立路由，实现了动态网络下SVC流媒体分级自适应高效传输。仿真结果表明，该方法在提升SVC流媒体传输效率和质量，改善用户体验方面有重要作用。

关键词: OpenFlow, 可分级视频编码, 流媒体传输, 时延自适应

Abstract:

For the current internet streaming media transmission delay sensitivity issues, a delay adaptive method for SVC (scalable video coding) streaming media transmission based on OpenFlow was proposed. This method combines SVC streaming scalable and flexible programmable features of OpenFlow effectively, and implements SVC streaming hierarchical adaptive transmission in a dynamic network,by building the base layer and the enhancement layer separate routes under complex network environment with limited network bandwidth and link congestion. Simulation results show that this method has an important role in improving efficiency and quality of the SVC streaming, so it can improve the user experience effectively.

Key words: OpenFlow, scalable video coding, media streaming, delay adaptive

黄韬,张丽,张云勇,刘韵洁. 基于OpenFlow的SVC流媒体时延自适应分级传输方法[J]. 通信学报, 2013, 34(11): 121-128.

Tao HUANG,Li ZHANG,Yun-yong ZHANG,Yun-jie LIU. Delay adaptive transmission method for scalable video streaming based on OpenFlow[J]. Journal on Communications, 2013, 34(11): 121-128.

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参考文献 14

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序号(i)	基础层数据接收时延	增强层数据接收时延	效用值eff(i)
1~M	D_base₁＞T	D_enhance₁＞T	0
M+1~2M	D_base₂＜2T	D_enhance₂＞2T	eff(i)=a
2M+1~3M	D_base₃＞3T	D_enhance₃＜3T	0
3M+1~4M	D_base₄＜4T	D_enhance₄＜4T	eff(i)=100
?	?	?	?
注：D_base_i表和D_enhance_i表示对应数据帧接收时间，M表示T 内要求播放帧数。

拓扑编号		路径时延/ms
拓扑编号	R1	R2	R3
1	50	100	150
2	250	200	150
3	300	400	150
4	500	400	150
5	600	700	150

文件大小 /MB		传统方案			新方案		2种方案基础层有效帧数量之差*	2种方案增强层有效帧数量之差*	2种方案的总效用差
文件大小 /MB	基础层有效帧数量	增强层有效帧数量	有效帧效用和	基础层有效帧数量	增强层有效帧数量	有效帧效用和	2种方案基础层有效帧数量之差*	2种方案增强层有效帧数量之差*	2种方案的总效用差
0	93	90	9 150	98	93	9 650	5	3	500
100	181	175	17 650	198	190	19 560	17	15	1 910
150	276	267	26 910	298	289	29 530	22	22	2 620
200	375	345	36 180	398	386	39 440	23	41	3 260
这里的“*”表示有效帧数量之差为新方案超过传统方案的数量。