Modeling and analysis of TCP Reno with packet-loss and long delay cycles in wireless networks

Other Title(s)

نمذجة و تحليل بروتوكول التحكم في معدل إرسال البيانات وفقا لنظام رينو مع فقدان حزمة البيانات و مدة التأخير في دورة ارسال البيانات في الشبكات اللاسلكية

Dissertant

Adarbah, Haytham Y.

Thesis advisor

al-Bahadili, Husayn

Comitee Members

al-Shalabi, Riyad
al-Hamami, Ala H.

University

Amman Arab University

Faculty

Collage of Computer Sciences and Informatics

Department

Department of Computer Science

University Country

Jordan

Degree

Master

Degree Date

2008

English Abstract

Modeling and simulations have been widely used to evaluate the performance of the Transport Control Protocol (TCP) in a wireless environment.

However, for many reasons, several efforts have been also directed to model and evaluate the performance of TCP in a wireless environment.

Therefore, during the last two decades, many models have been developed.

But, they all have their own limitations, due to the approximation they assumed during the modeling process, e.g., effects of long delays, frequency of occurrence of long delays, Slow-Start stage, Acknowledgement (ACK) mechanism, etc.

The main objective of this work is to develop a new model that can be used to evaluate the performance of TCP Reno in a wireless environment that suffers from Packet-Loss (PL) and Long Delay Cycles (LDCs), namely, the PLLDC model.

It models the TCP Reno Sending rate (S), Throughput (T), and Utilization factor (U) as a function of environment- and system-driven parameters.

The former include: Packet-Loss rate (p), duration of the Long Delay (D), Interval between Long Delays (I), and Round Trip Time (RTT), while the latter include: Timeout (To), Slow-Start Threshold at the end of a Long Delay (SST), number of packets acknowledged by one ACK packet (b), and the receiver’s maximum congestion Window size (Wm). In the PLLDC model, an LDC is assumed to consist of m instances of normal points (NPs) at the beginning and Long Delay Period (LDP) at the end.

The duration of NP is the sum of the duration of n Triple Duplicate Periods (TDPs) and Timeout period.

Furthermore, the duration of one LDP consists of two TDP periods, Long Delay, and one Slow-Start stage, minus the overlapping period between duration of the Long Delay and TDP.

The main advantage of the PLLDC model over other existing models is that it can be used to accurately predict the number of packets sent during all of the above durations, so that a detailed assessment of the TCP performance can be achieved, and proper solutions to enhance TCP may be proposed

Main Subjects

Electronic engineering

Topics

• Telecommunications
• Data processing
• Computer networks
• Digital communications
• Information networks

No. of Pages

92

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-529318