February 2004
Vol.42 No.2
|
|
|
|
 |
Multimedia Multicast/Broadcast Services in 3G/4G Networks |
| Prathima Agrawal, Mooi Choo Chuah, and Jens Zander |
MarconiNet: Overlay Mobile Content Distribution Network
Flexible multimedia streaming, such as advertisement insertion, location-based services, mobility, and wireless access, are vital components that make existing Internet radio and TV networks more attractive to roaming users.
Ashutosh Dutta, Telcordia Technologies Inc.; Henning Schulzrinne, Columbia UniversityBroadcast and Multicast Services in cdma2000
The authors describe a broadcast and multicast system design for the third-generation cdma2000® cellular system. Network, signaling, and physical layer aspects of the design are proposed to provide an efficient, scalable, and practical method to support one-to-many delivery of different contents.
Jun Wang, Ragulan Sinnarajah, Tao Chen, Yongbin Wei, and Edward Tiedemann; QUALCOMM IncorporatedCDMA2000® High Rate Broadcast Packet Data Air Interface Design
The Third Generation Partnership Project 2 recently baselined the specification for a CDMA2000® high-rate broadcast packet data air interface. The standard allows high-speed delivery of packet data to multiple access terminals. The authors describe the air interface design adopted by3GPP2, and present simulation results that predict the performance of the high-speed broadcast system.
Parag Agashe, Ramin Rezaiifar, and Paul Bender, QUALCOMM, Incorporated
 |
Broadband Access Varieties |
| Steve Gorshe and Zdzislaw Papir |
Efficient Transport of Packets with QoS in an FSAN-Aligned GPON
The standardization of passive optical networks capable of transporting Ethernet frames at gigabit-per-second speeds, currently in progress in both ITU-T and IEEE, constitutes a major milestone toward cost-effective photonization of the last (aka first) mile. This article presents an Ethernet Gigabit PON (GPON) system aligned with the philosophy of the evolving FSAN/ITU-T specification, which focuses on the efficient support of any level of quality of service. The intelligence of this system, in terms of traffic quality guarantees, lies in the MAC protocol, which controls the distributed multiplexing/concentration function by allocating variable length slots to every user of the shared upstream (toward the network) medium.
John D. Angelopoulos, Helen-C. Leligou, Theodore Argyriou, and Stelios Zontos; National Technical University of Athens; Edwin Ringoot and Tom Van Caenegem, Alcatel Research and Innovation, AntwerpenCrossing the Digital Divide: Cost-Effective Broadband Wireless Access for Rural and Remote Areas
The use of wireless, DSL, and cable for broadband access has become increasingly prevalent in metropolitan areas. While these technologies are being successfully utilized in terms of both service quality and economics in densely populated areas, there are still vast geographic regions where broadband services are either prohibitively expensive or simply unavailable at any price. The authors examine several alternatives for using 2.4 GHz 802.11b (WiFi) technology to provide fixed broadband access in rural areas consisting of towns, smaller remote communities, clusters of subscribers separated by large intercluster distances, as well as widely scattered users.
Mingliu Zhang and Richard S. Wolff, Montana State University
|
Also in this issue |
A Networking Laboratory for the Developing World
Internet-based communication is assuming an increasingly important role in the developing world. It is thus crucial that students be exposed to contemporary networking equipment in a realistic setting.
Shahid H. Bokhari, Masood Ahmed, and Saqib bin Sohail, UET, Lahore; Rizwan H. Khan, Imperial College, London; Jalil A. Mirza, Star Technologies, Lahore; Muhammad Ali, Royal Institute of Technology, StockholmClos Lives On in Optical Packet Switching
The authors discuss node architectures for optical packet switching and show how the multistage approach proposed by Clos can be adopted to solve scalability issues and construct switches with large port counts.
Jan Cheyns, Chris Develder, Erik Van Breusegem, Didier Colle, Filip De Turck, Paul Lagasse, Mario Pickavet, and Piet Demeester, Ghent University — IMECCapacity-Approaching Codes: Can They Be Applied to the Magnetic Recording Channel?
Digital signal processing and coding are increasingly being recognized as a cost-efficient approach in achieving substantial areal density gains while preserving the high reliability of disk drives, although historically advances in head and media technologies have been the main driving force behind areal density growth.
Ajay Dholakia, Evangelos Eleftheriou, and Thomas Mittelholzer, IBM Research, Zurich; Marc P. C. Fossorier, University of Hawaii at ManoaRollabout: A Wireless Design Tool
Deployment of wireless LANs includes two main design issues: selection of access point locations and access point frequency assignments. Properly solving these issues normally involves a trial and error process, and can be very time consuming. The Rollabout design tool partially automates this process, making it quicker and more efficient.
Alex Hills, Carnegie Mellon University
Jon Schlegel, Dynamicsoft
