Title: Mathematical modelling of packet transmission during reclamation period in NewReno TCP and CTCP

Authors: Bhavika Gambhava; C.K. Bhensdadia

Addresses: Department of Computer Engineering, Faculty of Technology, Dharmsinh Desai University, Nadiad, Gujarat, India ' Department of Computer Engineering, Faculty of Technology, Dharmsinh Desai University, Nadiad, Gujarat, India

Abstract: Usage of wireless links made the internet growth viable even in isolated places. TCP's congestion control immensely impacts the performance and robustness of the internet. TCP sender invokes flow control for any packet loss. Unconditional reduction of cwnd results in to inferior performance. The issue is compounded in wireless channels where packet losses are frequently due to channel errors. Composite TCP (CTCP) is a loss and delay-based mechanism. CTCP makes a fair decision about the type of loss. The primary objective of this paper is to show the critical impact of Reclamation Period to regain the original value of cwnd after an episode of error. The paper also demonstrates the performance benefit of CTCP due to appropriate estimation of cwnd, leading to significant performance improvement without hurting the other concerns. CTCP improves by 96.02% and 11.54% in case of 0.001 packet error rate for erroneous and congested networks, respectively.

Keywords: reclamation period; round trip time; congestion window; fast recovery; TCP; CTCP; cwnd; ssthresh; SRTT.

DOI: 10.1504/IJIPT.2023.131296

International Journal of Internet Protocol Technology, 2023 Vol.16 No.2, pp.110 - 118

Received: 24 Apr 2021
Accepted: 31 Mar 2022
Published online: 06 Jun 2023 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article