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GUEST EDITORIAL
IP MULTIMEDIA SYSTEMS INFRASTRUCTURE AND SERVICES — PART II
Mehmet Toy
I
Heinrich J Stüttgen
Mehmet Ulema
n the March 2007 issue of this magazine, we addressed the challenges at the infrastructure and service levels. This issue addresses additional areas such as applications, operations, and challenges in implementation and testing. The first article, “IMS for Enterprises” authored by Hechmi Khlifi and Jean-Charles Grégoire, discusses IMS applications and benefits for enterprise environments, integration of enterprise IMS with public IMS, and lesssons learned from implementation. The second article, “The Operator’s Response to P2P Service Demand” co-authored by Antonio Liotta and Ling Lin, describes how to develop peer-to-peer applications over IMS, its benefits, and a prototype supporting multiple applications. The third article, “NetCAPE: Enabling Seamless IMS Service Delivery across Heterogeneous Mobile Networks” by Asanga Udugama, Koojana Kuladinithi, Carmelita Goerg, Frank Pittmann, and Laurensius Tionardi, presents the architectural framework of the Networking Context Aware Policy Environment (NetCAPE), optimization of mobility management in such a heterogeneous environment while interacting with IMS applications to enable seamless service delivery across heterogeneous mobile networks , and improvements gained by applying NetCAPE concepts. The fourth article, “Charging in the IP Multimedia Subsystem (IMS) — A Tutorial” by Ralph Kühne, Gerald Görmer, Morten Schläger, and Georg Carle, describes the Third Generation Partnership Project (3GPP) charging framework, and how IMS charging works with an IMS scenario in which three persons with different payment methods conduct a teleconference. The fifth article, “The Threat of Unsolicited Sessions in the 3GPP IP Multimedia Subsystem” by David Waiting and Neco Ventura, points out the issues associated with possible unsolicited voice and video calls in IMS, and proposes mechanisms to allow users to filter their incoming multimedia sessions such that only legitimate calls are received. The sixth article, “Application-Level QoS Negotiation and Signaling for Advanced Multimedia Services in the IMS” by Lea Skorin-Kapov, Miran Mosmondor, Ognjen Dobrijevic, and Maja Matijasevic, describes application-level QoS signaling, proposes some enhancements based on advanced QoS parameter matching and optimization functionality to be included along the signaling path, and outlines various signal-
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ing flow scenarios with a case study involving an IMS-supported 3D virtual environment. The seventh article, “Mobility Testbed for 3GPP2-Based MMD Networks” by Ashutosh Dutta, Kyriakos Manousaki, Subir Das, Tsunchio Chia, Hidetoshi Yokota, Akira Idoul, and Henning Schulzrinne, describes a mobility testbed implementationn based on a 3GPP2 architecture where the outbound signaling servers are distributed around the network, and analyzes experimental results for three handoff techniques. The last article in this issue, “Experience with an IP Multimedia System Trial for PSTN Migration” by Hong-Bin Chiou, David Morrison, and Wanjiun Liao, describes various challenges experienced in a trial of migrating telephony services from the public switched telephone network (PSTN) to the IP multimedia system (IMS) domain. Articles in both the March and July issues of this magazine provide fairly good coverage of IMS. We hope that these articles will help readers’ understanding of the various IMS issues in architecture, services, and implementation. Again, we thank all the authors and reviewers who contributed immensely to putting together the two parts of this feature topic.
BIOGRAPHIES MEHMET TOY [SM] (
[email protected]) received B.S and M.S in electronics and communications from Istanbul Technical University, Istanbul, Turkey, in 1976, and a Ph.D in electrical and computer engineering from Stevens Institute of Technology, Hoboken, New Jersey, in 1982. He is currently a network consultant at ADVA Optical Networking, Inc., for metro Ethernet products. Prior to his current position, he held managerial and technical positions in Intel Corp., Verizon Wireless, Axiowave Networks, Fujitsu Network Communications, AT&T Bell Labs, and Lucent Technologies. He led IMS software/hardware integration and architecture definition at Intel Corp., represented Verizon Wireless at 3GPP2 standards, and participated in the development of Verizon Wireless IMS architecture. In Axiowave Networks, Inc., he led software development program, and was involved in the research and development of an IP/MPLS packet router and MEMS-based optical crossconnect. He led an architecture team for the research and development of ATM/IP/SONET access multiplexers at Fujitsu Network Communications. In AT&T Bell Labs and Lucent Technologies, he was involved in various research and development projects in transmission and data networking, including in the research and development of ATM switching systems. He served as an assistant professor at the University of North Carolina at Charlotte and taught at various universities, including the Worcester Polytechnic Institute in Massachusetts and the New Jersey Institute of Technology. He has publications in data networking and signal processing. He is the author of the IEEE video tutorial “ATM Switching System
IEEE Communications Magazine • July 2007
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GUEST EDITORIAL Management via Open Interfaces” and of the edited books Optical Networking I, Optical Networking II, and ATM Development and Applications (IEEE Press). He has served on the IEEE Network editorial board, and chaired the IEEE Communications Society IPAC Committee and the IEEE USA PACE Committee.
Chair of ComSoc’s Technical Committee on Communications Switching and Routing and is now Chair of ComSoc’s GLOBECOM/ICC Technical Committee. He also is Vice Chair of the special interest group on Communications and Distributed Systems (KuVS) of the German Information Technology Society (ITG).
HEINRICH STÜTTGEN [SM] (
[email protected]) was a Fulbright scholar at the State University of New York at Buffalo from which he holds a Master of Science degree (1979). In 1985 he obtained a doctoral degree in computer science from the University of Dortmund. In 1985 he joined the IBM Research and Development Laboratory at Böblingen working on the development of one of the first mainframe UNIX systems. In 1987 he moved to IBM’s European Networking Center (ENC) at Heidelberg, where he researched the area of high-speed networks and protocols for multimedia communications. In July 1997 he joined NEC Europe Ltd., where he is now general manager of NEC’s Network Laboratories at Heidelberg. The mission of the laboratories is research and advanced development in the area of mobile and multimedia Internet communications. He is a member of the IEEE Communications and Computer Societies. From 2004 to 2006 he was a Member at Large on the Board of Governors of IEEE ComSoc. He was
MEHMET ULEMA (
[email protected]) is a professor at Manhattan College, New York. Previously, he held management and technical positions in Daewoo Telecom, Bellcore, AT&T Bell Laboratories, and Hazeltine Corporations. He has been involved in a variety of wireless projects including 3G wireless networks, wireless LANs, wireless local loops, and management of wireless and wireline networks. He is on the Editorial Boards of IEEE Transactions on Service and Network Management, Journal of Network and Systems Management, and ACM Wireless Network Journal. He is a co-founder and past Chair of the IEEE Communications Society’s Information Infrastructure Technical Committee. He has been involved in a number ofIEEE conferences. Most recently he co-chaired ICC ’06. He received his M.S. and Ph.D. in computer science at Polytechnic University, New York. He also received B.S. and M.S. degrees at the Technical University of Istanbul, Turkey.
IEEE JOURNAL
SELECTED AREAS IN COMMUNICATIONS (JSAC) CALL FOR PAPERS WIRELESS COMMUNICATIONS AND NETWORKS
ON
UNDERWATER
Wireless information transmission through the ocean is one of the enabling technologies for the development of future ocean-observation systems, whose applications include gathering of scientific data, pollution control, climate recording, detection of objects on the ocean floor, and transmission of images from remote sites. Implicitly, wireless signal transmission is crucial for control of autonomous vehicles which will serve as mobile nodes in the future information networks of distributed underwater sensors. Wireless communications underwater are usually established using acoustic waves, while electro-magnetic waves can be used over short distances. Acoustic communications are governed by three factors: limited bandwidth, time-varying multipath propagation, and low speed of sound underwater. Together, these factors result in a communication channel of poor quality and high latency, thus ironically combining the worst properties of terrestrial mobile radio and satellite channels. In addition, because acoustic propagation is best supported at low frequencies, high-rate underwater systems are inherently ultra-wideband. These facts necessitate dedicated design of communication algorithms and network protocols at all layers of the system architecture. The proposed JSAC special issue seeks original research papers that explicitly address the unique technical challenges encountered in underwater scenarios, including (but not limited to) the following areas: • • • • • • • • •
Statistical channel modeling and estimation Underwater channel and network capacity Bandwidth-efficient modulation/detection methods Acoustic modem design and performance Coding for underwater channels Optical and RF underwater systems Network topology and architecture Resource allocation and spatial reuse Multiple access techniques
• • • • • • • •
Medium access control protocols Routing protocols Transport protocols Traffic characterization and modeling Data aggregation, fusion, and storage System integration and applications Experimental platforms Application experiences
Prospective authors should follow the IEEE J-SAC manuscript format described in the Information for Authors at . http://www.jsac.ucsd.edu/Guidelines/info.html. Authors should submit a PDF version of their complete manuscript to http://edas.info according to the following timetable: Manuscript Submission: February 15, 2008 Acceptance Notification: June 15, 2008 Final Manuscript Due: August 15, 2008 Publication: 4th Quarter 2008 GUEST EDITORS John Heidemann Information Sciences Institute
[email protected]
Urbashi Mitra University of Southern California
[email protected]
Milica Stojanovic Massachusetts Institute of Technology
[email protected]
IEEE Communications Magazine • July 2007
James Preisig Woods Hole Oceanographic Institute
[email protected]
Michele Zorzi University of Padova
[email protected]
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