期刊
IEEE TRANSACTIONS ON COMMUNICATIONS
卷 64, 期 6, 页码 2477-2493出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCOMM.2016.2553138
关键词
Multipath transport; heterogeneous wireless networks; bandwidth-efficiency; real-time video communication
资金
- National Natural Science Foundation of China (NSFC) [61132001, 61550110244]
- National High-tech R&D Program of China (863 Program) [2013AA102301]
- Fundamental Research Funds for the Central Universities [3222006403]
- Program for New Century Excellent Talents in University [NCET-11-0592]
- Project of New Generation Broadband Wireless Network [2014ZX03006003]
- National Research Foundation, Prime Minister's Office, Singapore under its IDM Futures Funding Initiative
Recent technological advancements in wireless infrastructures and handheld devices enable mobile users to concurrently receive multimedia contents with different radio interfaces (e.g., cellular and Wi-Fi). However, multipath video transport over the resource-limited and error-prone wireless networks is challenged with key technical issues: 1) conventional multipath protocols are throughput-oriented, and video data are scheduled in a content-agnostic fashion and 2) high-quality real-time video is bandwidth-intensive and delay-sensitive. To address these critical problems, this paper proposes a bandwidth-efficient multipath streaming (BEMA) protocol featured by the priority-aware data scheduling and forward error correction-based reliable transmission. First, we present a mathematical framework to formulate the delay-constrained distortion minimization problem for concurrent video transmission over multiple wireless access networks. Second, we develop a joint Raptor coding and data distribution framework to achieve target video quality with minimum bandwidth consumption. The proposed BEMA is able to effectively mitigate packet reordering and path asymmetry to improve network utilization. We conduct performance evaluation through extensive emulations in Exata involving real-time H.264 video streaming. Compared with the existing multipath protocols, BEMA achieves appreciable improvements in terms of video peak signal-to-noise ratio, end-to-end delay, bandwidth utilization, and goodput. Therefore, BEMA is recommended for streaming high-quality real-time video to multihomed terminals in heterogeneous wireless networks.
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