tailieunhanh - Báo cáo hóa học: " Review Article How IMS Enables Converged Services for Cable and 3G Technologies: A Survey"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Review Article How IMS Enables Converged Services for Cable and 3G Technologies: A Survey | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 589623 14 pages doi 2008 589623 Review Article How IMS Enables Converged Services for Cable and 3G Technologies A Survey Mehdi Mani and Noel Crespi Department of Wireless Networks and Multimedia Services TELECOM SudParis Institut TELECOM 9 Rue Charles Fourier 91011 Evry Cedex France Correspondence should be addressed to Mehdi Mani Received 31 August 2007 Revised 17 December 2007 Accepted 21 February 2008 Recommended by Weihua Zhuang The IP multimedia subsystem IMS is a service control overlay standardized by the 3GPP. The IMS is based on session initiation protocol SIP to establish modify and terminate the sessions. It provides a clean separation between services signaling and media with the potential to enable control and management of services over multiple transport technologies. In the scope of fixed-mobile convergence this paper is dedicated to presenting a review of how cable networks can be integrated into IMS technology to achieve 3G-cable horizontal convergence. Cable networks as one of the major fixed broadband access technologies with PacketCable architecture are able to provide broadband internet access and VoIP in addition to cable TV. In this article we review the evolution in PacketCable architecture to take up IMS. In this way we consider the standardization and research activities to address this integration. We review some important challenges such as SIP protocol compatibility defining unique user profile required enhancement in authentication process QoS and charging system. Copyright 2008 M. Mani and N. Crespi. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Fixed-mobile convergence FMC is an important area of research which .