© 2018 JETIR October 2018, Volume 5, Issue 10 www.jetir.org (ISSN-2349-5162) JETIR1810666 Journal of Emerging Technologies and Innovative Research (JETIR) www.jetir.org 375 Congestion Control Algorithms Review and Analysis for Structured Wireless Network 1 Girish Paliwal, 2 Dr. Swapnesh Taterh 1 Research Scholar, 2 Associate Professor 1 Amity Institute of Information Technology, 1 Amity University Rajasthan, Jaipur, India Abstract : The concept of digital India increasing the internet very rapidly. Each and every one try to access internet facilities but the network service providers are fail to maintain their network availability to each and every where to everyone with the same consistent speed. The number of users can not able to access the internet facility with same speed due to heavy traffic generated by the lot of mobile communication devices. Due to heavy traffic the congestion occurs and data packets are dropped. The service providers are increase their devices through high speed and large bandwidth but the protocols are remain unchanged. So in this direction lot of research required. The appropriate reason behind the congestion and slow data speed is that the TCP congestion control algorithms are not much efficient to control the congestion occurrence and low bandwidth at receiver end or intermediate routers. This article focused on the review of TCP congestion control mechanism and comparative analysis of congestion control algorithms. IndexTerms – congestion control, Transmission Control Protocol (TCP), wireless mobile network, bottleneck bandwidth I. INTRODUCTION Over the past decades, lot of work has been already done to enhance the TCP performance and the result many different congestion control algorithms. The number of congestion control algorithms are already developed and implemented after finding some enhancement result over the existing congestion control algorithms[1]. The researchers comment on the heterogeneous resource allocation to achieve the full efficiency of the devices for load balancing. The proposed load balancing algorithm compared with others to check their credibility. The load balancing is the major problem to achieve the maximum through put and make network congestion free but in real life load balancing applied, thereafter congestion occurs and required best approach to resolve the congestion[2]. In this research article the authors proposed an algorithm for packet routing in wireless sensor network to increase the performance of the WSN, in this article the focus to reducing the packet loss rate during routing, reduce energy consumption and increased the throughput[3]. The wireless network is having more challenges to the wired network. The TCP congestion control algorithms are successfully implemented and tested in wired computer network but TCP face some challenges in wireless mobile communication and mobile Ad-Hoc networking. Some of the main challenges are releted to wireless mobile communication as open network architecture, shared medium, high speed of mobile nodes, dynamic topology, limited energy, difficulty to find misbehaving mobile device etc. [4-6] The implementation and comparing them with other congestion control algorithms is troublesome without network simulators. In the real world scenario, it is very difficult to compare algorithm performance on the basis of actual devices it is possible with the simulators it is less time to consume and less expensive and given the moral as actual results. Computer simulator provides valuable insight into potential implementation before extending the considerable effort that may be required to build a technology simulator allow us to measure and compare the existing algorithm as well as we can introduce a new algorithm and compare in light of existing algorithms. It provides a much more flexible way to implement a new algorithm and finding out the related result on the basis of some existing networking topology [7]. Today network devices like smart mobile phone and servers are very well processing capabilities and interact with multiple network interfaces due to support of different wire/wireless technology. The TCP congestion control algorithms are classified on the traffic basis, time basis, path basis[8]. Wireless sensor networks can also be classified in two types as structured and unstructured. The structure wireless network has deployed in a planned manner and the numbers of mobile nodes are placed in a structure. The structure wireless network maintenance is easy and low cost applied for up gradation. In this categories the homogenous and heterogeneous network are working perfectly. Most of the public places are having structured wireless sensor network like railway station, airport, hospital, supermarket etc. Whereas the unstructured wireless network no topology specified, no pre-plan for deployment of mobile nodes, hard to maintained and required higher cost to maintain. Unstructured wireless mobile network very less used it is known as Mobile Ad-Hoc network, Vehicular Ad-Hoc network , Aircraft Ad-Hoc network etc.[9] It is very well known that TCP (Transmission control protocol) performed very well in varied networking environments wired or wireless or both. The TCP performance is throughput and fairness different in wired and wireless network scenario. In wireless mobile network, TCP performance is poor than the wired TCP. To improve TCP performance in wireless network reviewed different TCP congestion control algorithms and mitigation of congestion control.[10]