Dynamic Packet Assignment (DPA)
Wireless systems of the future are expected to support applications that require flexible data rates. With the limited availability of radio resources, high spectral efficiency is another necessary feature. Our focus is on dynamic resource allocation in 4G wireless systems and development of a flexible MAC protocol that can accommodate Multi-media traffic.
DPA:
Packetized transmission over wireless links makes it possible to achieve a high statistical multiplexing gain. High efficiency resource management and packet admission can be achieved due to DPA.
System capacity can be enhanced
with Wideband OFDM which requires OFDM based physical layer techniques
and DPA based MAC techniques . OFDM overcomes physical layer barriers for
attaining high bit rates and DPA enables aggressive packet access with
high spectrum efficiency.
Issues under study:
We are working on inter-connectivity and cross-layer issues in ad hoc networks. Aim is to provide practical solutions to complex wireless networking issues through ad hoc networking techniques. We are considering relay-networking, hierarchical-networking, mesh-networking etc as basic scenarios. We also plan to extend these to networks with multi-mode nodes which will help realise the next generation communication networks that interact.
We are working on extending the network simulator, ns2 with both codes at the core and the script level. Modules to handle specific problems in wireless networking are being added. Here is a short tutorial on ns2.
Consulting project: The AU-KBC research centre has worked with Ushustech. Pvt. Ltd., Trivandrum on a consulting project in the WLAN area. It involved developing and simulating enhanced MAC with QoS considerations. (IEEE 802.11e).