Congestion Reduction in Wireless Mesh Networks

Abstract

Wireless Mesh Networks are looming as a key technology for next generation of existing wireless networks. The network falls into the category of infrastructure less wireless networks that rely on high mobility and dynamic topology. Though mesh topology provides good reliability, market coverage and scalability, there are number of issues and challenges in WMN. Amongst all, the most prevailing issue is the problem of packet loss due to congestion. The routing protocol always uses the best shortest path for the transmission of data. Congestion occurs when each time the protocol chooses the same path. Congestion problem can be overcome by involving a congestion control algorithm. In this paper, a congestion control scheme based on AODV routing protocol has been proposed. In this technique, buffers at the intermediate nodes are checked against two cases. First the capacity of the buffer on the whole is checked, if it crosses a certain threshold then second condition i.e. the capacity of the packets present in the buffer for the available destinations is checked against a second threshold. If it crosses a certain threshold value then data forwarding is carried out through alternate paths. The proposed technique has improved the performance of AODV protocol. Simulation results for AODV carried out in NS-2 clearly show the increase in throughput and decrease in end to end delay.

A Survey of Packet Collision Minimization Algorithms in Wireless Mesh Networks

“…WMNs is the communication technology that consists of nodes which are organized in Mesh Topology network, which provides good performance, reliability and flexibility over a wireless network. Wireless Mesh Networks can be combined with other networks such as internet, cellular, IEEE 802.11 etc., using a gateway and bridging functions in mesh network routers [1]. In WMN, the network users freely move from one point to another at any time while they are accessing the network or exchanging packets within the network.…”

“…Congestion occurs every time when the routing protocol chooses the same shortest path to transmite network traffic, however, due to high traffic load on that shortest path packet collission occures. As a result, packet loss occures hence degrading the performance of WMNs [1], [3].…”

Minimization of Packet Congestion in Wireless Sensor Networks

“…Grover et al [1] proposed to use Congestion Control Algorithms based on AODV routing protocol to overcome the congestion in the network. The author use AODV routing protocol to implement routing in the network.…”

“…WSNs consist of a large number of small sensor nodes and these nodes are very cheap in terms of cost [1,2]. This is mostly, because wireless networks processes the authority of services for long-distance communication was wires cannot be implemented [3,4].…”

A Survey of Packet Collision Minimization Algorithms in Wireless Mesh Networks

“…As a result, packet loss occures hence degrading the performance of WMNs [1], [3]. The full research paper is structured inn the following way: In Section II, we present packet collision overview in WMNs.…”