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CLC number: TN929.5

On-line Access: 2014-10-09

Received: 2014-02-16

Revision Accepted: 2014-05-24

Crosschecked: 2014-09-17

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Journal of Zhejiang University SCIENCE C 2014 Vol.15 No.10 P.929-942


Seamless handover between unicast and multicast multimedia streams

Author(s):  Mau-Luen Tham, Chee-Onn Chow, Yi-han Xu, Khong Neng Choong, Cheng Suan Lee

Affiliation(s):  Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia; more

Corresponding email(s):   thammauluen@siswa.um.edu.my, cochow@um.edu.my, xuyihan86@gmail.com, kn.choong@mimos.my, cslee@powerallnetworks.com

Key Words:  Experimental approach, Multimedia session continuity, Seamless handover, Unicast/multicast switching, Multi-media streaming

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Mau-Luen Tham, Chee-Onn Chow, Yi-han Xu, Khong Neng Choong, Cheng Suan Lee. Seamless handover between unicast and multicast multimedia streams[J]. Journal of Zhejiang University Science C, 2014, 15(10): 929-942.

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journal="Journal of Zhejiang University Science C",
publisher="Zhejiang University Press & Springer",

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%T Seamless handover between unicast and multicast multimedia streams
%A Mau-Luen Tham
%A Chee-Onn Chow
%A Yi-han Xu
%A Khong Neng Choong
%A Cheng Suan Lee
%J Journal of Zhejiang University SCIENCE C
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%N 10
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%@ 1869-1951
%D 2014
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C1400052

T1 - Seamless handover between unicast and multicast multimedia streams
A1 - Mau-Luen Tham
A1 - Chee-Onn Chow
A1 - Yi-han Xu
A1 - Khong Neng Choong
A1 - Cheng Suan Lee
J0 - Journal of Zhejiang University Science C
VL - 15
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1400052

With the deployment of heterogeneous networks, mobile users are expecting ubiquitous connectivity when using applications. For bandwidth-intensive applications such as Internet Protocol Television (IPTV), multimedia contents are typically transmitted using a multicast delivery method due to its bandwidth efficiency. However, not all networks support multicasting. Multicasting alone could lead to service disruption when the users move from a multicast-capable network to a non-multicast network. In this paper, we propose a handover scheme called application layer seamless switching (ALSS) to provide smooth real-time multimedia delivery across unicast and multicast networks. ALSS adopts a soft handover to achieve seamless playback during the handover period. A real-time streaming testbed is implemented to investigate the overall handover performance, especially the overlapping period where both network interfaces are receiving audio and video packets. Both the quality of service (QoS) and objective-mapped quality of experience (QoE) metrics are measured. Experimental results show that the overlapping period takes a minimum of 56 and 4 ms for multicast-to-unicast (M2U) and unicast-to-multicast (U2M) handover, respectively. The measured peak signal-to-noise ratio (PSNR) confirms that the frame-by-frame quality of the streamed video during the handover is at least 33 dB, which is categorized as good based on ITU-T recommendations. The estimated mean opinion score (MOS) in terms of video playback smoothness is also at a satisfactory level.


重要结论:实验结果表明,在网络的重叠区域内,多播网络—单播网络和单播网络—多播网络的切换时间分别为56毫秒和4毫秒。依据ITU-T建议书,利用本文方法得到的视频画质被归为"好"。平均意见得分(mean opinion score, MOS)证实了视频播放流畅度。

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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