Overview of WTL and Ultrawideband Technology
The Wireless Technologies Laboratory was established in early 2004 by seven researchers from Motorola Labs in Sydney. The Laboratory specialises in research and development of high speed wireless communications technologies. Current projects are in the areas of Ultrawideband, 4G Communications and Wireless Sensor Networks. The Laboratory has close industry links in USA and Australia and active collaboration with the Chinese Academy of Sciences and the Shanghai Jiao Tong University. In this presentation we give an overview of our research activities and an overview of Ultrawideband technology, focusing on industry and standards activities.
Routing in MANETs wtih Address Conflicts
A Mobile Ad-Hoc Network (MANET) consists of a collection of portable devices/nodes equipped with one or more wireless interfaces that cooperatively form an infra-structureless communication network. As nodes continually join and leave the MANET, managing the problem of address conflicts is particularly challenging. In the past, researchers have gone to great lengths to ensure that nodes are assigned unique addresses and various protocols and policies have been designed to resolve address conflicts. In this presentation we will highlight various address auto-configuration solutions and argue that these solutions put unnecessary stress on the dynamic operation of a MANET. We then present a routing sub-layer that enables a MANET to operate even when there are conflicting addresses. We show how packets are routed across conflicting nodes in various communication scenarios unambiguously. As a result, nodes are not required to check whether addresses are unique before initiating communication nor have to renumber when conflicts arise. Thus, a MANET using our sub-layer saves on signaling overheads and avoids problems faced by existing address auto-configuration protocols.
