iPTT: peer-to-peer push-to-talk for VoIP

Authors:
Jiun-Ren Lin;Ai-Chun Pang;Yung-Chi Wang
Affiliations:
Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan, R.O.C.;Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan, R.O.C. and Graduate Institute of Networking and Multimedia, National Taiwan University, Taip ...;Graduate Institute of Networking and Multimedia, National Taiwan University, Taipei, Taiwan, R.O.C.
Venue:
Wireless Communications & Mobile Computing
Year:
2008

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Abstract

This paper proposes iPTT, a peer-to-peer (P2P) Push-to-Talk (PTT) service for Voice over IP (VoIP). In iPTT, a distributed and mobile-operator independent network architecture is presented to accelerate the deployment of the PTT service. Based on the serverless architecture, we develop two mechanisms, that is, flooding-based floor control mechanism (FFC) and tree-based floor control mechanism (TFC), for real-time talk-burst determination. The determination algorithms and the corresponding message flows for these two mechanisms are designed to show the feasibility of FFC and TFC. The performance of FFC and TFC is investigated through our analytical and simulation models in terms of the determination latency and the number of floor-control message exchanges. Copyright © 2008 John Wiley & Sons, Ltd.