Alzyoud, Faisal Yousef Abed-alrahman
(2011)
Xcast Based Routing Protocol For Push To Talk Application In Mobile Ad Hoc Networks.
PhD thesis, Universiti Sains Malaysia.
Abstract
Mobile ad-hoc networks comprise a type of wireless network that can be easily
created without the need for network infrastructure or administration. These networks
are organized and administered into temporary and dynamic network topologies.
Unfortunately, mobile ad-hoc networks suffer from some limitations related to
insufficient bandwidth. The proliferation of new IP Multimedia subsystem services
(IMs), such as Push-to-talk (PTT) applications consume large amounts of bandwidth,
resulting in degraded QoS performance of mobile ad-hoc networks. In this thesis, a
Priority XCAST based routing protocol (P-XCAST) is proposed for mobile ad-hoc
networks to minimize bandwidth consumption. P-XCAST is based on demand route
requests and route reply mechanisms for every destination in the P-XCAST layer. To
build the network topology and fill up the route table for nodes, the information in the
route table is used to classify the XCAST list of destinations according to similarities
on their next hop. Furthermore, P-XCAST is merged with a proposed Group
Management algorithm to handle node mobility by classifying nodes into two types:
group head and member. The proposed protocol was tested using the GloMoSim
network simulator under different network scenarios to investigate Quality of Service
(QoS) performance network metrics. P-XCAST performance was better by about
20% than those of other tested routing protocols by supporting of group size up to
twenty receivers with an acceptable QoS. Therefore, it can be applied under different
network scenarios (static or dynamic). In addition Link throughput and average delay
was calculated using queuing network model; as this model is suitable for evaluating the IEEE 802.11 MAC that is used for push to talk applications. The analytical results
for link throughput and average delay were used to validate the simulated results.
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