One of the major areas of research in the Network
and Telecommunications Research Group is in wireless networks.
The core of the
4th Generation Telephony network will be a fixed packet-switched network
using protocols evolved from those in use in today's Internet but it will
have to operate seamlessly with future wireless networks. We are therefore
interested in investigating a wide range of wireless issues as part of
the process of designing the ultimate 4GT network. Our interests
in wireless networks fall under the following headings
Software Programmable Radios
To deal with the myriad of wireless network standards which are in
existence, it is widely accepted that software programmable radios are
the best solution to the problems We are involved in a number of software
radio projects including a project for the ISM band based on Spread
Spectrum techniques and a software packet radio project - SPACE.
The software radio will be incorporated into NOMAD.
Mobility Issues in Wireless Networks
Users of 4GT are considered mobile whether they are moving
from one fixed terminal to the next or using handheld devices. We are exploring
the many possibilities which will enable efficient and seamless mobility
from network to network. Click on mobility
issues for details. We are also investigating the use of directory
services as a means of tracking mobile users; at present we are experimenting
with X.500 directory services using the Lightweight Directory Access
Protocol ( LDAP).
Wireless Solutions made Simple
Many wireless solutions in today's world involve highly sophisticated
equipment and advanced software. One of the interests of the NTRG
is to search for simple solutions to wireless communications. As part of
this scheme we are developing voice over packet radio. The work will also
involve an investigation of robust schemes for the transmission of digital
voice video over low bandwidth links. The resulting schemes will
be deployed in a 4th Generation Telephony system.
Mobile Antenna Design
In a wireless network it is important to consider the antennas which
are used in order to ensure good quality transmission and reception of
signals. See Antennas
for use in Mobile Communications for details of current projects.
Interesting Wireless Links
Last Updated: September 23rd 1998 by firstname.lastname@example.org