SEAMLESS FLOW OF VOLUMINOUS DATA IN HIGH SPEED NETWORK WITHOUT CONGESTION USING FEEDBACK MECHANISM

T Sheela,J Raja

doi:10.18000/ijies.30047

Abstract

Continuously growing needs for Internet applications that transmit massive amount of data has led to the emergence of high speed network. Data transfer must take place without any congestion and hence feedback parameters must be transferred from the receiver end to the sender end so as to restrict the sending rate in order to avoid congestion. Even though TCP tries to avoid congestion by restricting the sending rate and window size, it never announces the sender about the capacity of the data to be sent and also it reduces the window size by half at the time of congestion therefore resulting in the decrease of throughput, low utilization of the bandwidth and maximum delay. In this paper, XCP protocol is used and feedback parameters are calculated based on arrival rate, service rate, traffic rate and queue size and hence the receiver informs the sender about the throughput, capacity of the data to be sent and window size adjustment, resulting in no drastic decrease in window size, better increase in sending rate because of which there is a continuous flow of data without congestion. Therefore as a result of this, there is a maximum increase in throughput, high utilization of the bandwidth and minimum delay. The result of the proposed work is presented as a graph based on throughput, delay and window size. Thus in this paper, XCP protocol is well illustrated and the various parameters are thoroughly analyzed and adequately presented.

Highlights

High bandwidth environment is useful for sending large volumes of data within short period of time [1]
To recover from the packet loss, congestion window size is reduced by half, and so the congestion window size is increased by 1 segment for every Round Trip Time
The simulation study shows that the proposed protocol calculates the feedback based on arrival rate, service rate, traffic rate and queue size and the receiver informs the sender about the throughput, capacity of the data to be sent and window size adjustment, resulting in no drastic decrease in window size, better increase in sending rate because of which there is a continuous flow of data without congestion

Summary

INTRODUCTION

High bandwidth environment is useful for sending large volumes of data within short period of time [1]. Due to the gradual increase and sudden decrease in high speed network, utilization of bandwidth by TCP is very poor[3][12][14]. In the proposed work, the new protocol XCP operates between network layer and transport layer In this protocol, the feedback mechanism is useful and it is to modulate sending rate based on the traffic and service rate of the network in order to avoid congestion. Throughput(32 bits): This field indicates the inter-packet time of the flow as calculated by the sender, in fixed point format with 28 bits after the binary point, in seconds Unused(8 bits): This field is unused and must be set to zero in this version of XCP. The Position of XCP in the protocol suite is shown in Fig. 3.This protocol is placed between the TCP and IP and it is a transport level protocol

MATHEMATICAL MODEL

Traffic rate

Network

XCP window

CONCLUSION