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Usha, M.
- Performance Analysis of Priority based Congestion Control for Heterogeneous Traffic in Multipath Wireless Sensor Networks
Authors
1 Department of Computer Science and Engineering, Sona College of Technology, Salem, Tamilnadu, IN
Source
Wireless Communication, Vol 4, No 9 (2012), Pagination: 482-487Abstract
In wireless sensor network, the highly important problem to be considered is congestion. Congestion in a wireless sensor network can cause packet loss, which in turn reduces throughput and energy efficiency. Different priorities are set for different types of data generated in heterogeneous wireless sensor networks. In multi path routing, the data flow is forwarded in multiple paths to the sink node. In this paper we analyze the performance of a priority based congestion control for heterogeneous traffic in multi path wireless sensor network. We have considered the nodes that have multiple applications running with different priorities. The parent node of each sensor node allocates the bandwidth among its child nodes based on the source traffic priority and transit traffic priority of the data from heterogeneous applications in the child nodes. Packet service ratio is used to detect the congestion. The proposed work is simulated in NS2. The results are shown based on the evaluation of delay, loss and throughput through X-graph and performance is better when compared with PCCP protocol.
Keywords
Congestion Control, Heterogeneous Traffic, Multi Path, Priority.
- Performance Evaluation of Quality Based Bidirectional Reliability Protocol for Wireless Sensor Networks
Authors
1 Department of Computer Science and Engineering, Sona College of Technology, Salem, TamilNadu, IN
Source
Wireless Communication, Vol 4, No 9 (2012), Pagination: 506-512Abstract
Wireless sensor network consists of sensor nodes with limited battery power. In our protocol energy conservation is provided through clustering and bidirectional reliability. Bidirectional reliability includes event reliability and query reliability. Event detection is made possible with collective information received from many sensor nodes. But this increases congestion in the network and reduces the network life time. So we go for quality based event detection by classifying nodes as essential and non-essential nodes after which clustering is done. This classification is based on contribution degree and remaining energy. Many clusters are formed to cover the entire sensing field. In each cluster essential node communicates with sink node whereas nonessential node communicates only with essential nodes and they do not report event information to the sink node. The query information transmitted by the sink node is received only by essential nodes and then forwarded to non-essential nodes. Thus our proposed protocol achieves the bidirectional reliability between sink node and essential nodes. We have evaluated the performance of QBRP through simulation experiments. The simulation results show that QBRP achieves higher performance in terms of energy consumption, communication delay, and jitter.