This seminar will describe the transformation of circuit-switched communication networks being brought abut by SIP (Session Initiation Protocol) and SIMPLE (SIP extensions for Instant Messaging and Presence). This transformation is underway in a global scale and across multiple sectors: cable providers, ISPs, cellular providers and enterprise networks. The most visible effects of this transformation is in the rapid adoption and deployment of network-based applications such as Voice-over-IP (VoIP), Instant Messaging (IM) and Presence, using servers and software as the building blocks, instead of a switching infrastructure. Telecom is now being redefined, for example, with Yahoo and Google offering telephony services through VoIP. SIP clients are now ubiquitous in client platforms (such as Microsoft Windows and cell phones), in the form of Softphones and IM clients on desktops and Push-to-talk on cell-phones. IP Multimedia Subsystem (IMS), which is an integral part of 3G networks and is now being considered actively for wireline networks as a framework for new communication services, is based on SIP/SIMPLE. All these advances are, in effect, creating new “convergence layer” realized through an overlay network of SIP servers and clients, which is being used to deploy new applications and services, representing the next phase in internet-based communication and services.
This seminar will cover the fundamental aspects of SIP/SIMPLE as the core technology to create converged network architecture and applications, specifically protocol-level description of SIP, programming interfaces to create SIP-based network services, overview of IMS and role of SIP in 3G wireless networks, new applications that leverage SIP, current standardization efforts, open-source projects and emerging advances such as peer-to-peer SIP.
Dr. Arup Acharya
Dr Arup Acharya works in the Internet Infrastructure and COmputing Utilities Dept at IBM T.J. Watson Research Center and also leads the Advanced Networking micropractice in On-Demand Innovation Services. He has been working on SIP/SIMPLE and NGN for the past four years, through research projects, customer consulting engagements and providing subject matter expertise in corporate strategy teams. Presently, he is leading a IBM Research project on scalability and performance of SIP servers for large workloads. His past projects have included studying the role on SIP in multiple areas such as applications beyond voice, wearable computing, multi-player networked games and location-based services such as e911. He is involved with a joint industry/academia NSF project on a testbed for next generation wireless networks, developing peer-to-peer SIP architectures. __His other interests include networking architectures such as IPv6 and wireless mesh networks. He has published extensively in conferences/journals, and is/was the Vice-Chair of IEEE ICDCS 2006, IEEE MASS 2005 and Program Chair for COMSWARE 2007. He was the past co-chair of the Global Internet and Next Generation Networks Symposium, Globecom 2004. He has also contributed to the IETF and ATM Forum. Before joining IBM, he was with NEC C&C Research Laboratories, Princeton between May '95 and Nov'99. He holds a Visiting Professor position at WINLAB, Rutgers University. He received a B.Tech degree in Computer Science from the IIT, Kharagpur and a PhD in CS from Rutgers University in 1995. Further information is available at http://www.research.ibm.com/people/a/arup/
Dr. Archan Misra
Dr. Archan Misra is a Research Staff Member with the Next Gen Web Infrastructure Department at the IBM TJ Watson Research Center, Hawthorne, NY. He has been working on infrastructural components and protocols for context-based computing and pervasive applications for the past 3 years. As part of this work, his group is exploring the use of SIP for retrieving an individual’s activity on different communication channels and thereby enhancing presence to reflect an individual’s availability for various tasks. As part of his earlier job as a researcher at Telcordia Technologies (Bellcore), Archan worked on mobility management architectures for IP-based cellular networks, including both network-layer (extensions to Mobile IP) and application-layer (extensions to SIP) handoff techniques. __His other ongoing research efforts and interests include mobility protocols for next-generation (4G) wireless networks, protocols for high-performance wireless meshes and query middleware for wireless sensor networks. He has published extensively in the areas of wireless networking, congestion control and mobility management. He is currently the Untethered Technologies chair of the IEEE Computer Society’s Technical Committee on Computer Communications (TCCC). Archan received his Ph.D. in Electrical and Computer Engineering from the University of Maryland at College Park in May, 2000, and his B.Tech in Electronics and Communication Engineering from IIT Kharagpur, India in July 1993. Professional details are available at http://www.research.ibm.com/people/a/archan.
Mr. Avshalom Houri
Avshalom Houri is an architect that specializes in SIP standards and architecture. Currently, Avshalom is working in IBM as a SIP standards expert and as SIP architect to the SIP infrastructure of IBM’s Lotus Workplace™. He is a regular participant in the IETF since 1997 and is concentrating in the activities of SIP related groups in the IETF. He is working in IBM since 1996 and was one of the main architects that have designed the IBM Sametime™ servers. Prior to joining IBM he worked in Ubique™ that was one of the first Internet companies in Israel. Ubique was bought by America Online and created Virtual Places for them. After a while Ubique was spun out from AOL and was bought by IBM. Avshalom received his Msc. in computer science from the Weizmann Institute in Rehovot Israel.