A Model for Congestion Control of Transmission Control Protocol in Mobile Wireless Ad Hoc Networks

Abstract

Transmission Control Protocol (TCP) is a fundamental protocol in the TCP/IP Protocol Suite.TCP was well designed and optimized to work over wired networks where most packet loss occurs due to network congestion. In theory, TCP should not care whether it is running over wired networks, WLANs, or Mobile Ad hoc Networks (MANETs). In practice, it does matter because most TCP deployments have been carefully designed based on the assumption that congestion is the main factor of network instability. However, MANETs have other dominating factors that cause network instability. Forgetting the impact of these factors violates some design principles of TCP congestion control and open questions for future research to address. This study aims to introduce a model that shows the impact of MANET factors on TCP congestion control. To achieve this aim, Design Research Methodology (DRM) proposed by BLESSING was used as a guide to present this model. The proposed model describes the existing situation of TCP congestion control. Furthermore, it points to the factors that are most suitable to be addressed by researchers in order to improve TCP performance. This research proposes a novel model to present the impact of MANET factors on TCP congestion control. The model is expected to serve as a benchmark for any intended improvement and enhancement of TCP congestion control over MANET.

Comparative Study on the Performance of TFRC and SCTP Over AODV in MANET

“…The delay can be measured also by computing the time between the start and receive times. A proposed novel model from [10] for delay Table 2 and Table 3 show the throughput and delay for TFRC and SCTP in both scenarios.…”

“…A comparison study [5] between TFRC and TCP in MANET over Ad hoc On-Demand Distance Vector (AODV) and DSR in terms of throughput, delay and jitter, the traffic is CBR with random mobility with three speeds (5,10,15), the conclude of the study that even though DSR gives better performance for TFRC (in terms of throughput) and the same performance for TCP, but both TFRC and TCP better to use AODV because DSR causes much more jitter and that affects the performance badly especially for multimedia applications.…”