Different Transmission Control Protocol Variants in Wireless Environments (original) (raw)
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— Computer networks have experienced an explosive growth over the past few years, which has lead to some severe congestion problems. Reliable protocols like TCP works well in wired networks where loss occurs mostly because of congestion. However, in wireless networks, loss occurs because of bit rates and handoffs too. TCP responds all losses by congestion control and avoidance algorithms, which results in degradation of TCP's End-To-End performance in wireless networks. This paper discusses different issues and problems regarding use of TCP in wireless networks and provides comprehensive survey of various schemes to improve performance of TCP in Wireless Networks.
Study of Proposed Methods for Improving TCP Performance Over Wireless Links
Computing Research Repository, 2009
TCP is designed for networks with assumption that major losses occur only due to congestion of network traffic. On a wireless network TCP misinterprets the transmission losses due to bit errors and handoffs as losses caused by congestion, and triggers congestion control mechanisms. Because of its end to end delivery model, congestion handling and avoidance mechanisms, TCP has been widely accepted as Transport layer protocol for internetworks. Extension of Internetworks over wireless links is inevitable with the spread of ubiquitous computing and mobile communications. This paper presents study of different mechanisms proposed to extend Transport Control Protocol and other alternate solutions to enhance end to end performance over lossy wireless links. The paper studies details of different design choices proposed and their technical advantages and disadvantages. Finally, an analysis and proposal for best choice of proposed schemes are made for wireless networks.
Different Issues and Survey of Proposed Solutions in TCP over Wireless E nvironments
Computer networks have experienced an explosive growth over the past few years, which has lead to some severe congestion problems. Reliable protocols like TCP works well in wired networks where loss occurs mostly because of congestion. However, in wireless networks, loss occurs because of bit rates and handoffs too. TCP responds all losses by congestion control and avoidance algorithms, which results in degradation of TCP's End-To-End performance in wireless networks. This paper discusses different issues and problems regarding use of TCP in wireless networks and provides comprehensive survey of various schemes to improve performance of TCP in Wireless Networks.
TCP-Performance for Wireless Environment
2018
Improving the performance of the transmission control protocol (TCP) in wireless environment has been an active research area. Main reason behind performance degradation of TCP is not having ability to detect actual reason of packet losses in wireless environment. In this paper, we are providing a simulation results for TCP-P (TCP-Performance). TCP-P is intelligent protocol in wireless environment which is able to distinguish actual reasons for packet losses and applies an appropriate solution to packet loss. TCP-P deals with main three issues, Congestion in network, Disconnection in network and random packet losses. TCP-P consists of Congestion avoidance algorithm and Disconnection detection algorithm with some changes in TCP header part. If congestion is occurring in network then congestion avoidance algorithm is applied. In congestion avoidance algorithm, TCP-P calculates number of sending packets and receiving acknowledgments and accordingly set a sending buffer value, so that i...
WTCP: An efficient mechanism for improving TCP performance over wireless links
… , 1998. ISCC'98. Proceedings. Third IEEE …, 1998
The Transmission Control Protocol (TCP) used in the Internet has been mainly designed assuming a relatively reliable wireline network. TCP assumes that any loss is due to congestion and consequently invokes congestion control measures. This has been shown to yield poor performance in the presence of wireless links as a large number of segment losses will occur more often because of wireless channel errors or host mobility. We present an e cient transmission control scheme (WTCP) that requires the base station to bu er data packets destined for the mobile host and retransmit lost packets. Through simulations, we show that our scheme yields better throughput than other existing proposals while maintaining TCP's end-to-end semantics. One salient feature of WTCP is that it e ectively hides the time spent by the base station to locally recover so that the TCP's round trip time estimation at the source is not a ected. This is critical since otherwise the ability of the source to e ectively detect congestion in the wireline network will be hindered.
A Review on Techniques for Enhancing the Performance of TCP for Wireless Transmission
2020
TCP is globally used protocol for reliable data transfer from source to destination. TCP stands for Transmission Control Protocol which is used for wired and wireless networks both. In general when a packet is lost TCP understands that it is happen just because of congestion in the network. By knowing the actual reason of packet loss we may increase the performance of TCP. This paper presents the various performance enhancement techniques for TCP.
Wi-TCP: A TCP in Wireless Environment
International Journal of Computer Applications, 2013
Due to the strong drive towards wireless Internet access through mobile terminals, it has become necessary to carefully handle the issues in the wireless environment such as frequent handover/handoff (user mobility), temporary disconnection, burst error and fading. These characteristics of wireless environment deteriorate the performance of wireless systems sharply in terms of TCP throughput as TCP is basically designed for wired networks to provide reliable delivery by using congestion control and error control mechanisms. In mobile IP based network, mobility plays an important role as handover issue makes negative impact on system performance and to enhance the behavior of TCP during handoff, a novel scheme is proposed. Wi-TCP is a new wireless end to end transmission control protocol, designed to support the TCP handoffs in mobile IP based network by utilizing the basic features of Mobile IP, Route Optimized Mobile IP and TCP.
A Review Of Protocols Related To Enhancement Of TCP Performance In Wireless And WLAN Networks
Proposition assumed by the TCP protocol that any packet loss is due to network congestion, is no longer suitable for wireless networks, because TCP poorly fulfills its role in such networks. In this article has been presented and been listed the main causes of this performance degradation. Even though there are many methods and protocols have been proposed TCP variants up until now, in this review only a few of them have been studied. Here as solutions to the reasons of TCP performance degradation in wireless and wireless LAN networks were grouped into three main groups: end-to-end approaches, split-connection approaches and proxy-based approaches. Research in this area is still producing rapid action, and considerable amount of problems are still widely open, so this article is to identify the main causes of TCP performance degradation over wireless networks and to review some proposed TCP variant to prevent such lack of TCP in wireless and WLAN networks.
Comparative analysis of different TCP variants in a wireless environment
International Conference on Electronic Computer Technology, 2011
TCP is being used as a highly reliable end-to-end protocol for transporting applications. TCP was originally designed for wired links where the error rate is really low and actually assumed that packet losses are due to congestion in the network. But TCP performance in wireless networks suffers from significant throughput degradation and delays. TCP uses congestion control and avoidance algorithms
Improved TCP congestion control mechanism for Multihop Wireless Networks
Transmission Control Protocol (TCP) is working well in wired networks. TCP needs modification to work well in wireless networks. This work analyses the performance of the proposed two TCP cross layer flavours, namely the TCP-AL and TCP-WPAL. The cross layer interaction (TCP-WPAL) produces better performance than the TCP-AL. The PDR (Packet Delivery Ratio) of the TCP-WPAL is increased, and the delay and jitter of the TCP-WPAL are decreased in multihop wireless networks.