Bilkent University
Department of Computer Engineering


Multipath Routing Supporting Real-Time Communication in Wireless Ad Hoc Networks


Gokce Gorbil
Computer Engineering
Bilkent University

Wireless Ad Hoc Networks are becoming more prominent and practically available for use as we progress in the 21st century. The disconnection of wires and the idea of utilizing self-configuring dynamic networks seem to be the trend rather than the exception in the practical network community. Such networks are inherently different in terms of network characteristics from wired networks and therefore require the adaptation and development of new protocols throughout most of the protocol stack. The great difference between the underlying physical medium between wired and wireless networks affect almost all of the layers down from the physical layer up to the transport layer. Of significant importance among these layers is the network layer, where hop-by-hop packet routing and network topology creation and maintenance is achieved. Current users of wireless ad hoc networks demand the conventional applications such as e-mail, file transfer, file sharing, personal/conference meetings (chat) and web browsing, which are more or less supported at the moment. However, time-critical applications such as security and surveillance applications as well as applications requiring QoS such as media streaming, are not strongly supported. In this presentation, we will explore some of the network protocols for wireless ad hoc networks supporting real-time communication, with special emphasis on protocols using more than one path between sender and receiver (the multipath scheme). We will first go quickly over the basics of network routing, and develop a classification for network protocols. We will cover various methods for network monitoring and several suitable parameters for link/path characterization. The special requirements that the wireless medium poses on the network protocol will be investigated and the demands of real-time communication on the underlying network protocol will be examined. Finally, the details of some routing protocols trying to achieve all the posed requirements will be discussed.


DATE: March 13, 2006, Monday@ 15:40