A priority based model to increase TCP throughput over WSN Mohammad

Wireless sensor networks (WSNs) are a popular wireless technologies to access the internet and growth of using TCP/IP model indicates many applications is supported by TCP to connect mobile nodes over wireless links. Development of new wireless networks like wireless sensor networks makes it essential to improve TCP's Performance. TCP is initially developed for wired networks where each packet loss is assumed to be due to congestion. TCP are lead to performance degradation in WSN where such environment imposes packet loss due to error prone channels and node mobility. TCP works on the assumptions that each packet loss is the sign of congestion. However packet losses are due to many reasons likes' poor resources, random bit error rate, poor channel bandwidth and noisy channels and node mobility in wireless sensor networks. In presence of these unique characteristics of wireless sensor network, TCP performs poorly in WSN, because it treats every packet loss is as a result of congestion. TCP invokes congestion avoidance algorithm and decreases its transmission rates by reducing congestion window. In this paper, a simulation based performance analysis is presented in the term of TCP throughput. The throughput decay of TCP are evaluated in wireless sensor networks and discuss about problem which causes this degradation. The proposed model modify TCP congestion detection module which packet losses due high bit error rate of wireless link should be distinguished from packet losses across congestion. It evaluated by simulated results and throughput enhancement verified by NS2. [Mohammad Mehdi Hassani. A priority based model to increase TCP throughput over WSN. Life Sci J 2017;14(3):54-57]. ISSN: 1097-8135 (Print) / ISSN: 2372-613X (Online). http://www.lifesciencesite.com. 9. doi:10.7537/marslsj140317.09.