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Provision of Communication Services over Hybrid Networks
Guest Editors: Jean-Pierre Hubaux, David Nagel, and Bruce Kieburtz
CIRULE1.GIF (372 bytes)
Broadband Satellite Network Performance
Guest Editors: Sastri Kota, Raj Jain, and Rohit Goyal

CIRULE.GIF (223 bytes)

Provision of Communication Services over Hybrid Networks

True Number Portability and Advanced Call Screening in a SIP-Based IP Telephony System
The authors demonstrate how personal information can be coupled with an IP telephony service to provide user-customized call handling by the network.
Ismail Dalgic, Michael Borella, Rick Dean, Jacek Grabiec, Jerry Mahler, Guido Schuster, and Ikhlaq Sidhu

Enabling Hybrid Services in Emerging Data Networks
This article describes the nature of the enhanced emerging networks and outlines the structure of a service platform that would support its functions.
George Vanecek, Nelu Mihai, Nino Vidovic, and Dalibor Vrsalovic

A Programmable Architecture for the Provision of Hybrid Services
The authors propose an architecture for the provision of hybrid services that span multiple networks, especially IP-based networks and the telephone and cellular networks.
Constant Gbaguidi, Jean-Pierre Hubaux, Maher Hamdi, and Asser N. Tantawi

Supplementary Services in the H.323 IP Telephony Network
With the revolution of multimedia in the computer industry, voice, video, and data are now being carried on both circuit-switched telephone and packet networks.
Markku Korpi and Vineet Kumar

Speech Transmission Performance Planning in Hybrid IP/SCN Networks
TDM transmission and ATM switching are established as two wide area core network technologies, operating in conjunction at different layers of the protocol stack.
Mark E. Perkins, Charles A. Dvorak, Barry H. Lerich, and Joseph A. Zebarth

On Applying Formal Techniques to the Development of Hybrid Services: Challenges and Directions
The authors discuss some concerns for the application of formality in an industrial environment.
Xavier Logean, Falk Dietrich, Jean-Pierre Hubaux, Sylvain Grisouard, and Pierre-Alain Etique

Broadband Satellite Network Performance

NASA's Broadband Satellite Networking Research
This article summarizes some of the major experiments and demonstrations performed using protocols such as ATM and TCP/IP over broadband satellite networks.
William D. Ivancic, David Brooks, Brian Frantz, Doug Hoder, Dan Shell, and David Beering

Modeling and Simulation of Broadband Satellite Networks
Part II: Traffic Modeling

Three traffic modeling areas for satellite network simulation are identified, and an effective and flexible traffic model is proposed for each area.
Bo Ryu

Performance Evaluation of TCP Extensions on ATM over High Bandwidth Delay Product Networks
Comparison studies of TCP/IP on ATM networks over a high-speed satellite link with the same host/traffic configurations over local area and wide area networks are presented.
Charalambos P. Charalambous, Victor S. Frost, and Joseph B. Evans

TCP/IP Enhancements for Satellite Networks
This article presents various solutions to the challenges faced by the TCP/IP protocol in satellite environments and discusses possible trade-offs.
Nasir Ghani and Sudhir Dixit

The Development of Performance and Availability Standards for Satellite ATM Networks
ITU-R Working Party 4B is developing recommendations that deal with the performance of ATM over satellites.
Enrique G. Cuevas

A Review of Error Performance Models for Satellite ATM Networks
Error modeling and analysis of ITU-T Recommendations G.826 and I.356 performance criteria and satellite design principles are reviewed.
João Célio Brandão, Ernesto Leite Pinto, and Marco A. G. Maia

A Satellite-Switched CDMA System for Fixed Service Communications
The authors discuss SS/CDMA, a system proposed for geostationary fixed satellite service.
Diakoumis Gerakoulis, Robert Miller, Saeed Ghassemzadeh, and Evaggelos Geraniotis

Standards Topics

IP and Telecommunication Integration: De Jure and De Facto Standards Have Entered a New Era
This article provides the new trends in standards/specifications of organizations, including ITU-T, ATM-F, DAVIC, TIPHON, and others, on IP-related technologies.
Koichi Asatani