Improved congestion control using reset frequency controlled dynamic parameter re estimation in wireless sensor networks

Abstract

Congestion is a phenomenon which occurs in data communication newlinenetworks while transmitting packets beyond the admissible limit of a link newlineThe function of transport layer in a sensor network protocol stack is to assure newlinereliable data transmission and hence handling congestion is a part of a newlinetransport protocol Some of the standard transport protocols widely newlineimplemented at present are Transmission Control Protocol TCP User newlineDatagram Protocol Stream control Transmission Protocol and newlineDatagram Congestion Control Protocol Out of these protocols TCP newlineensures reliable data transmission with in order packet delivery and newlinecongestion control UDP supports neither in order delivery nor congestion newlinecontrol and hence highly unreliable protocol DCCP implements TCP like newlinecongestion control mechanism but does not support reliable data transmission newlineas in UDP However all these protocol are mainly designed for wired and newlinewireless networks not for sensor networks newlineThe nodes of a Wireless Sensor Network are randomly newlinedeployed over a specific region or embedded inside the application that needs newlineto be remotely monitored and so the structure is very ad hoc nature Further newlinethe nodes are very tiny and have only limited capabilities and restricted newlinebattery power Hence the protocols which are designed for normal wired and newlinewireless networks may not be completely suitable for WSNs newline newline