| It is highly desired to support real-time multimedia session services in a Mobile Ad Hoc Network (MANET). The standard protocol published by IETF for setting up multimedia session applications in a fixed IP network is the Session Initiation Protocol (SIP). However, SIP-based services depend on the SIP overlay infrastructure. MANETs being lack of any such infrastructure, require auxiliary mechanisms to support such services.
Although a few approaches have been proposed to use SIP over MANETs, none of them considers the issue of deploying SIP over MANETs running on the Dynamic Source Routing (DSR) Protocol.
The main contribution of this paper is that we propose an integrated SIP-based session establishment mechanism with extensions of the Dynamic Source Routing (DSR) Protocol over MANETs through effectively applying the cross-layer design between the networking routing protocol and the application layer SIP methods. In addition, we present that it is not necessary for SIP over MANETs to use Via header field any more. Our simulation results show that the proposed mechanism offers superior performances when compared to the SIP MANETs running on the normal DSR.
The proposed integrated SIP session setup mechanism is implemented in the OPNET simulators in order to assess the performance results. The performance metrics of interest include the call setup delay, the success ratio of call setup and the normalized routing load.
Our simulation results show that the proposed mechanism offers superior performances when compared to the SIP MANETs running on the normal DSR. Based on the results of our simulations, the proposed mechanism can be adapted and applied as a SIP service discovery and session establishment mechanism for MANET running on DSR. |
| Xiaoyan Zhang received the B.Sc. and M.Sc. degrees from the School of Computer Science and Technology, Beijing University of Posts and Telecommunications, in 1994 and 1997, respectively. She is presently an Associate Professor in the School of Software Engineering at Beijing University of Posts and Telecommunications, Beijing, China. Her current research interests include quality-of-service, multimedia networking and location management.
Xiaofeng Du received the B.Sc. and M.Sc. degrees from the School of Computer Science and Technology, Beijing University of Posts and Telecommunications, in 1994 and 1997, respectively. He is now an instructor in the School of Continuing Education at Beijing University of Posts and Telecommunications, Beijing, China. His current research interests are in quality-of-service over packet-switched networks, wireless and wired alike.
Zygmunt J. Haas received his B.Sc. in 1979 and his M.Sc. in 1985, both in electrical engineering. In 1988, after earning his Ph.D. from Stanford University, he joined AT&T Bell Laboratories in the Network Research Department. From September 1994 to July 1995, he worked for the AT&T Wireless Center of Excellence. In August 1995 he joined the faculty of the School of Electrical and Computer Engineering at Cornell University, where he is now a professor and associate director for academic affairs. He is an author of numerous technical conference and journal papers, and holds 15 patents. He has organized several workshops, delivered numerous tutorials at major IEEE and ACM conferences, and serves as an editor of several journals and magazines. He has served as Chair of the IEEE Technical Committee on Personal Communications and is currently serving as Chair of the Steering Committee of IEEE Pervasive Computing. His interests include mobile and wireless communication and networks, performance evaluation of large and complex systems, and biologically inspired networks. |