Providing seamless QoS for multimedia multicast in wireless packet networks

To support real-time multimedia applications in wireless packet networks, it is an essential challenge to provide seamless quality of service (QoS) to mobile users. In this paper, we address the problem of real-time multimedia multicast in cellular networks, and present our solution to avoid large QoS fluctuations during handoffs. Specifically, during a multicast session, a mobile host may experience varying packet delay, delay jitter, and channel error when it moves from one cell to another. It is thus desirable that these location-dependent QoS parameters appear as seamless as possible to mobile hosts. We present protocols to achieve a degree of transmission synchronization among multiple cells, so that the delays and delay jitters of each packet to all subscribing mobile hosts do not vary substantially. In addition, we apply Forward Error Correction technique to recover the QoS-mandatory packets from wireless channel errors. We show through analysis and simulation that the mobile hosts will experience brief, smooth, and low packet loss rate handoffs.

[1]  Lixia Zhang,et al.  VirtualClock: a new traffic control algorithm for packet-switched networks , 1991, TOCS.

[2]  Mahmoud Naghshineh,et al.  Link Error impact on MPEG video over Wireless Broadband Networks , 1997 .

[3]  Donald F. Towsley,et al.  Parity-based loss recovery for reliable multicast transmission , 1997, TNET.

[4]  K ParekhAbhay,et al.  A generalized processor sharing approach to flow control in integrated services networks , 1993 .

[5]  A. Reibman,et al.  Forward error control for MPEG-2 video transport in a wireless ATM LAN , 1996, Proceedings of 3rd IEEE International Conference on Image Processing.

[6]  Brown S. SinghDepartment.  The Problem of Multicast in Mobile Networks , 1996 .

[7]  Lixia Zhang.  VirtualClock: A New Traffic Control Algorithm for Packet-Switched Networks , 1991, ACM Trans. Comput. Syst..

[8]  Hui Zhang.  Providing end-to-end performance guarantees using non-work-conserving disciplines , 1995, Comput. Commun..

[9]  Baochun Li,et al.  Synchronized end-to-end multicast in real-time packet cellular networks , 1998, IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201).

[10]  Aura Ganz,et al.  Synchronized Broadcast in Cellular Networks , 1996 .

[11]  George Varghese,et al.  Leap forward virtual clock: a new fair queuing scheme with guaranteed delays and throughput fairness , 1997, PODC '97.

[12]  Hang Liu,et al.  Transmission of video telephony images over wireless channels , 1996, Wirel. Networks.

[13]  D. Estrin,et al.  RSVP: a new resource reservation protocol , 2001 .

[14]  Roshdy H. M. Hafez,et al.  Adaptive rate controlled, robust video communication over packet wireless networks , 1998, Mob. Networks Appl..

[15]  Harrick M. Vin,et al.  Generalized guaranteed rate scheduling algorithms: a framework , 1997, TNET.