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Baru, Vijay B.
- Energy Efficient Routing Protocol for Wireless Sensor Network
Authors
1 Sinhgad College of Engineering, University of Pune, Vadgaon, Pune-41, IN
2 Department of Electronics and Telecommunication Engineering, Sinhgad College of Engineering, University of Pune, Vadgaon, Pune 41, IN
Source
Wireless Communication, Vol 4, No 8 (2012), Pagination: 409-413Abstract
The energy efficiency of a wireless sensor network (WSN) is one of the most critical requirements in WSNs. Due to limited energy resources, network lifetime is one of the critical issues as well. Numerous mechanisms have been proposed to reduce the impact of communication protocols on the overall energy dissipation of WSN. We propose an enhancement in Low Energy Adaptive Clustering Hierarchy (LEACH) protocol, which modifies the prominent LEACH by electing a new Cluster Head (CH) before the existing cluster head dies. The enhancement is realized by adding a phase where existing CH advertises its cluster members if it is going to die. The cluster members check their own energy levels. If the member's energy is above a predefined threshold then that member can elect itself as a new CH. The simulation result shows the energy consumption of a single node over the time. Result graph shows the energy consumed by the node in the modified LEACH protocol is less than the energy consumed by the node in the LEACH protocol. This enhancement increases energy efficiency for WSNs, thus extending WSN lifetime.Keywords
LEACH, WSN, Cluster Head, Energy.
- An Enhanced TCP Congestion Control Algorithm for Wired/Wireless Networks
Authors
1 Sinhgad College of Engineering, University of Pune, vadgaon, Pune-41, IN
2 Department of Elecronics and Telecommunication Engineering, Sinhgad College of Engineering, University of Pune, Vadgaon, Pune 41, IN
Source
Networking and Communication Engineering, Vol 4, No 4 (2012), Pagination: 238-242Abstract
TCP's one of the main tasks is to react and avoid network congestion. A wide literature is available regarding the behavior of congestion control algorithms in many different scenarios and various congestion control algorithms have been proposed in order to improve performances in specific scenarios. In this paper, modifications proposed to the TCP Westwood congestion control algorithm so that it performance would enhanced. TCP Westwood (TCPW) is sender side modification of the congestion window algorithm that improves upon the performance of TCP Reno in wired as well as wireless networks. Some statistical counters have been used for RTT measurement to check the congestion occurrence or packet transmission error in wireless network. This proposed algorithm is tested using the Network Simulator version-2 (ns-2). Moreover, the algorithm is end-to-end in nature and modifies only TCP sender's algorithm.