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General Information
    • ISSN: 2010-3751 (Print)
    • Frequency: Quarterly
    • DOI: 10.18178/IJFCC
    • Editor-in-Chief: Prof. Mohamed Othman
    • Executive Editor: Ms. Cherry L. Chan
    • Abstracting/ Indexing: Crossref, Electronic Journals LibraryEI (INSPEC, IET), EBSCO, etc.
    • E-mail:  ijfcc@ejournal.net 
Prof. Mohamed Othman
Department of Communication Technology and Network Universiti Putra Malaysia, Malaysia
It is my honor to be the editor-in-chief of IJFCC. The journal publishes good papers in the field of future computer and communication. Hopefully, IJFCC will become a recognized journal among the readers in the filed of future computer and communication.
IJFCC 2014Vol.3(5): 319-324 ISSN: 2010-3751
DOI: 10.7763/IJFCC.2014.V3.319

A P2P-MCU Approach to Multi-Party Video Conference with WebRTC

Kwok-Fai Ng, Man -Yan Ching, Yang Liu, Tao Cai, Li Li, and Wu Chou
Abstract—WebRTC enables web browsers with real-time communications capabilities via JavaScript APIs. But when the number of the participants increases, the bandwidth and CPU requirements have become a serious issue in a push based mesh network. In this paper, we propose a P2P-MCU approach for multi-party video conferencing that efficiently supports both ordinary smart mobile phones and PCs. In our approach, a MCU module is integrated into the browser to mix and transcode the video & audio streams in real time. And when the browser acts as the MCU node leaves the conference session without notice, another candidate browser can take over the control immediately, and the ongoing WebRTC conference can be seamlessly recovered with our MCU selection algorithm. In addition, our approach works under the 3G symmetric NAT networks by using some UDP hole punching method. Our P2P-MCU solution reduces 64% CPU usages and 35% bandwidth consumptions for each participant compared to the mesh-network solution in our eight-party WebRTC conference experiments. Although the P2P-MCU module may introduce some delay (<500ms), the delay is stable and perceptually almost neglectable.

Index Terms—MCU, P2P, video conference, WebRTC.

Kwokfai Ng, Manyan Ching, and Yang Liu are with Hong Kong Applied Science and Technology Research Institute Company Limited, HK (e-mail: micng@astri.org, rachelc@astri.org, yangliu@astri.org).
Tao Cai, Li Li, and Wu Chou are with Huawei Technologies Co., Ltd, Shenzhen, China (e-mail: t.cai@huawei.com, Li.NJ.Li@huawei.com, Wu.Chou@huawei.com).


Cite: Kwok-Fai Ng, Man -Yan Ching, Yang Liu, Tao Cai, Li Li, and Wu Chou, "A P2P-MCU Approach to Multi-Party Video Conference with WebRTC," International Journal of Future Computer and Communication vol. 3, no. 5, pp. 319-324, 2014.

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