ROUTING FOR QoS IN AD HOC WIRELESS NETWORKS
Independent thesis Advanced level (degree of Master (Two Years))Student thesis
ABSTRACT Ad hoc network is a collection of wireless mobile nodes which dynamically form a temporary network without the use of any pre-existing network infrastructure or centralized administration. They operate by interactions among their neighbourhood wireless mobile nodes. Such interactions provide the required administration and control functions that support networks of that nature. Ad hoc wireless networks provide significant advantages on wide environments and certain applications. These types of networks could be internally fault-resilient, since they do not work under fixed topology. However, the networks are time-varying since all the nodes operate as mobile. Ad hoc networks automatically adapt to environments which are at the extremes of high mobility with low bandwidth and vice versa. In an ad hoc network that is multi-hop and for two nodes that are not direct neighbours, the communication between these nodes require that there should be a relay of message by the node that is in between them. Each of these nodes in the network acts as a router and also as a communication end-point. The cooperation and collaboration of all network layers is required for the provision of QoS support. Growth in wireless communication has been very astronomical in the past few years. Every technology is going wireless. Quality of service is a big issue that has to be addressed. Our main concern here is QoS routing. Every node broadcasts beacon packets periodically identifying it and its QoS characteristics. In the centre of ad hoc networking lies beaconing mechanism because without this, a node will not know its adjacent neighbours that changes dynamically in an ad hoc networking scenario. For routing, the knowledge of adjacent neighbours is very essential. To support QoS for real time traffic we need to know not only the minimum delay path to destination, but also the bandwidth available on it. We would also deal with how to improve QoS in an ad hoc wireless network; and Universal Mobile Telecommunications Systems (UMTS). QoS in an ad hoc wireless network pose a complex issue because of dynamic nature of the network topology; but, it would be addressed here.
Place, publisher, year, edition, pages
2009. , 53 p.
Ad Hoc, QoS, Routing, Wireless
Signal Processing Computer Science Telecommunications
IdentifiersURN: urn:nbn:se:bth-3733Local ID: oai:bth.se:arkivex4E17421A1B796E07C12575EC002EEF6BOAI: oai:DiVA.org:bth-3733DiVA: diva2:831045