期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2017
卷号：95
期号：19
页码：5215
出版社：Journal of Theoretical and Applied
摘要：Transmission Control Protocol (TCP) is a reliable transport layer protocol that works well in a wired network. TCP achieves this reliability by sending an acknowledgment for the data packets transmitted. During data transmission packets might be dropped. In wired networks packet loss is a rare event and the reasons for loss in most cases is attributed to buffer overflow. In such cases this is handled by TCP by reducing the transmission rate. However the same might not be the scenario in a wireless network. In wireless network packet loss may be due to various reasons such as node failure, link failure of an intermediate node, signal loss, network partitions, hidden and exposed terminals. Thus TCP performance degrades in a wireless network and TCP for wireless adhoc networks has to withstand these challenges. Route instability is another major challenge in Mobile Adhoc network and the role of a routing protocol has a significant impact on the performance of TCP throughput. This paper improves the performance of TCP in mobile Adhoc networks by using a Greedy cross layer routing algorithm which reduces the route instability problem in TCP for Adhoc networks. The simulations were done using Qualnet 5.0. The simulation results show a significant improvement in the throughput, reduction in the number of packets lost and the number of retransmissions.
关键词：Transmission Control Protocol (Tcp); Throughput; Hidden And Exposed Terminal; Routing Instability; Retransmissions; Routing Algorithm
