Volume 32, Issue 2, April 2016

Controlled Sink Mobility for Efficient Design of a Wireless Sensor Network [Full Text]

Dr. Mohammed A. Abdala and Zahraa A. Ismaeel

Abstract— One of the most promising research ways for improving the performance of wireless sensor networks (WSNs) is taking the advantage of the mobility of some of the components of the network. This reduces the load on the nodes around the sink that always forwarding packets of other nodes as well as their own packets. In this paper, two controlled sink mobility algorithms are proposed named Distance Based Controlled Sink Mobility (DBCSM) and Improved Distance Based Controlled Sink Mobility (IDBCSM) algorithms for controlling the movement of the sink by moving it towards the farthest nodes which have higher remaining energy and lower load. The performance of the two algorithms are evaluated and compared with static, random and predictable mobility strategies using NS2 network simulator. Results show a network lifetime improvement of about 19%-162%. 

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Performance Enhancement of VANET Routing Protocols [Full Text]

Rasha K. Aswad, and Mohammed A. Abdala

Abstract— VANET is a type of wireless networks that emerged in recent years, which provides communication between the moving vehicles on the roads, and aims to reduce accidents. The routing protocols in VANET are affected by the vehicles high speed which leads to frequently link breaks between the communicated vehicles, so the ad hoc routing protocols are adapted with the VANET characteristics to deliver the data between vehicles in short time. This paper presents three modified proposals routing protocols namely: ERS-AODV, ART-AODV and COM-AODV routing protocols. These modified routing protocols have improved the performance of the AODV routing protocol in general. Results show that the COM-AODV has the highest enhancement.