The 4th Generation Telephony Concept
The projects page lists the various projects the the NTRG is currently involved in.
Staff, Postgraduates, Undergraduates and NTRG Alumni
Resources for 4BA2, 1ICT1 and 3ICT1 undergraduate courses.
Papers, Technical reports and presentations
Some links to telecommunications, e-commerce and cryptography resources.
Much of the dynamism present in the telephony industry today has stemmed from mobile telephony. The first generation of mobile telephones were based on analogue technology and were relatively unsophisticated. The second generation systems involved digital technology. Perhaps the most successful of these is the Global System for Mobile (GSM) Communications.
Applied research is now taking place aimed at defining standards for the 3rd generation mobile systems. At a European level, this is referred to as the Universal Mobile Telecommunications Systems (UMTS) and the global standardization effort undertaken by the ITU is called IMT-2000. The direction of this research is to evolve today's circuit switched core network to support new spectrum allocations and higher bandwidth capability. Efforts are also being made to integrate the many diverse mobile environments in addition to blurring the distinction between the fixed and mobile networks.
4th generation telephony supports broadly similar goals to the 3rd generation
effort but starts with the assumption that future networks will be entirely
packet-switched using protocols evolved from those in use in today's Internet.
Today's internet telephony systems are the forerunner of the applications
that will be used in the future to deliver telephony services.
Among the major benefits of the 4th generation approach are the following:
Research IssuesBefore the promise of 4th generation systems can be delivered, a number of research issues must be resolved. These include:
Naming and Addressing
Quality of Service (QoS) Support)
Ongoing Project WorkWithin the Network and Telecommunications Research Group , a number of efforts are being made to address the above issues. Our telephony testbed application is called NOMAD. It currently supports calls across UDP, RTP and Native ATM links. Directory support is available based on customized LDAP services. Multi-party payment methods based on adapted micropayment systems are under development.
4th Generation PublicationsSome of the groups recent publications on topics related to 4th Generation Telephony are listed below.
O'Mahony, D., Universal Mobile Telecommunications Systems : The fusion of fixed and mobile networks, IEEE Internet Computing, Vol. 2, No. 1, January/February 1998, pp 49-56
Lloyd, D. & O'Mahony, D., Smart IP Switching : A Hybrid System for Fast IP-based Network Backbones, in proceedings of the 1st IEEE International Conference on ATM - ICATM'98, June 22-24, 1998, Colmar, France, pp 500-506
O'Mahony, D., Doyle, L., Tewari, H. and Peirce, M., NOMAD - An Application to Provide UMTS Telephony Services on Fixed Terminals in COBUCO , in Proceedings of the 3rd ACTS Mobile Communications Summit, Rhodes, Greece, June 8th-10th, 1998, pp 72-76
OMahony, D., Peirce, M. and Tewari, H., Electronic Payment Systems, Artech House, Boston, 1997, 250pp
O'Mahony, D. & Lloyd, D., The Role of Smart IP Switching in 4th Generation Telephony, in Proceedings of Multi-Service Networks '98, Cosener's House, Rutherford-Appleton Laboratories, August 6-7th, 1998.
Media SnippetsCableLink Interview - Note that this file is very large and may take sometime to download
ResourcesInternet Telephony Links