Browsing by Author "Arafeh, B."
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Item Metadata only Effect of Physical and Virtual Carrier Sensing on the AODV Routing Protocol in noisy MANETs(IEEE, 2013) Adarbah, H. Y.; Linfoot, Scott L.; Arafeh, B.; Duffy, A. P.Item Open Access Efficient Broadcasting for Route Discovery in Mobile Ad-hoc Networks(International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS), 2014) Adarbah, H. Y.; Ahmad, Shakeel; Arafeh, B.; Duffy, A. P.Broadcasting is used in on-demand routing protocols to discover routes in Mobile Ad-hoc Networks (MANETs). On-demand routing protocols, such as AODV (Ad-hoc On-demand Distance Vector) routing, commonly employ pure flooding based broadcasting. However, pure flooding generates excessively redundant routing traffic that may lead to broadcast storm problem (BSP) and deteriorate the performance of MANETs significantly. Probabilistic broadcasting schemes were proposed in the literature to address BSP. However, these schemes do not consider thermal noise and interference which exist in real life MANETs, and therefore, do not perform well in real life MANETs. This paper presents a novel Channel Adaptive Probabilistic Broadcast (CAPB) scheme to disseminate RREQ packets efficiently. The proposed CAPB scheme determines the probability of rebroadcasting RREQ packets on the fly according to the current SINR (Signal to Interference plus Noise Ratio) and node density in the neighborhood. The proposed scheme and two related state of the art (SoA) schemes from the literature ( [1] and [2]) are implemented in the standard AODV routing protocol to replace the pure flooding based broadcast. Simulation results show that the proposed scheme outperforms the standard AODV and the two competitors in terms of routing overhead, throughput and end-to-end delay significantly.Item Metadata only Impact of physical and virtual carrier sensing on the route discovery mechanism in noisy MANETs(IEEE, 2013) Linfoot, Scott L.; Adarbah, H. Y.; Arafeh, B.; Duffy, A. P.In cellular consumer devices, one of the limiting factors for efficiency is that of overhead on the network layer that effects on the performance of the network. A substantial design issue is that, with cellular consumer devices, the discovery phase of the routing process, when attempting to establish a mobile ad hoc network, a high demand is placed on the network layer. Hence, a challenge for the designer is to reduce this demand, thus increasing overall device availability. Routing algorithms, and hence the performance of the networks are adversely affected by inefficient carrier sensing methods which can lead to increasing packet loss within the network environment. In this paper, the effect of physical and virtual carrier sensing on the route discovery mechanism has been identified and this paper suggests that choosing a suitable carrier sensing threshold in a high density and noisy mobile ad hoc network yields a better performance than if the default value is used.Item Metadata only Impact of the Noise Level on the Route Discovery Mechanism in Noisy MANETs(2013) Adarbah, H. Y.; Linfoot, Scott L.; Arafeh, B.; Duffy, A. P.