The digital era of communications shapes the globe from wired networks to wireless network, offline media to online media. The mobile adhoc network is one of the major categories of network where the users depends upon and accessing the services too. As the number of users increases in accessing the data in mobile adhoc networks, the major challenging issue is congestion. The type of data transmitting and receiving in mobile adhoc networks mainly deals with multimedia data i. e audio, video and animations. The bandwidth utilization is high in case of multimedia data in the mobile ad hoc network when compared to other data payloads. The network performance level can be optimized by reducing the congestion in mobile adhoc networks. It is highly difficult to provide best performance to meet the user expectations in mobile adhoc networks. As in mobile adhoc network, Congestion control at the transport layer is the greater role. Subsequently, the various compound designs are being used and system which has to adjusted as per the service providers.
As Quality of Service is very much required by users in mobile adhoc networks and it’s very much problematic to attain them by having a less number of resources. TCP is the standard protocol of transport layer which behaves in different flavors. Among such variants NewReno and HSTCP are the most commonly used. However the performance of TCP NewReno and HSTCP are very much sensitive to immediate changes in the traffic load. For achieving the QoS in mobile adhoc networks the problems related with congestion issues has to be addressed. The proposed work identifies certain number of issues during the improvement of QoS in mobile adhoc networks. Hence, the proposed algorithms MHSTCP and SwTCP are designed and developed. MHSTCP and SwTCP give attention towards few parameters such as Bandwidth utilization, Data rate, Delay, and energy. The proposed algorithms are simulated in Network Simulator-2 by varying impairments and results are verified. Based on the simulation results, the research outcome shows that the proposed algorithms outperform the existing TCP congestion control variants in enhancing the QoS parameters in Mobile adhoc networks.
Inhaltsverzeichnis (Table of Contents)
- Chapter 1: Introduction
- 1.1 Background
- 1.2 Transport Layer for Ad-hoc Networks
- 1.3 Transport Layer Protocol for Ad-hoc Networks
- 1.4 Congestion control in TCP
- 1.5 Motivation for the research work
- 1.6 Scope of the Research Work
- 1.7 Definition of the Problem
- 1.8 Aim and Objectives of the Proposed Work
- 1.9 Organization of the Thesis
- Chapter 2: Literature Work
- Chapter 3: TCP Congestion Control Techniques
- Chapter 4: Modified HSTCP
- Chapter 5: Switching TCP
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This thesis aims to improve the Quality of Service (QoS) for multimedia data transmission in mobile ad hoc networks by addressing congestion control issues at the transport layer. The research focuses on developing and evaluating novel TCP congestion control algorithms to enhance QoS parameters such as bandwidth utilization, data rate, delay, and energy efficiency.
- QoS enhancement in mobile ad hoc networks
- TCP congestion control algorithms
- Multimedia data transmission in mobile ad hoc networks
- Performance evaluation of proposed algorithms
- Bandwidth utilization, delay, and energy efficiency
Zusammenfassung der Kapitel (Chapter Summaries)
Chapter 1: Introduction: This chapter provides background information on mobile ad hoc networks (MANETs), focusing on the challenges of providing QoS for multimedia data transmission. It reviews existing transport layer protocols and congestion control mechanisms in TCP, highlighting their limitations in MANET environments. The chapter then defines the problem, outlines the research objectives, and presents the scope of the proposed work, setting the stage for the development and evaluation of novel congestion control algorithms.
Chapter 2: Literature Work: This chapter presents a comprehensive review of existing literature on TCP congestion control variants and multimedia data processing in MANETs. It examines the strengths and weaknesses of various TCP algorithms such as HighSpeed TCP and NewReno, analyzing their suitability for handling multimedia traffic. The chapter also explores different approaches to multimedia streaming in MANETs, including UDP streaming, HTTP streaming, CDNs, VoIP, and various multimedia networking protocols (RTP, SIP, RTSP), providing context for the proposed research and highlighting the gaps in existing solutions.
Chapter 3: TCP Congestion Control Techniques: This chapter delves into the details of TCP congestion control techniques. It provides an in-depth explanation of various TCP variants, including their congestion avoidance mechanisms and retransmission strategies. The chapter analyzes the performance of these existing TCP variants under congestion, examining metrics such as packet drop rate, latency, and throughput. This analysis lays the groundwork for comparing the performance of the proposed algorithms against established techniques. The detailed examination of existing algorithms allows for a more precise understanding of their limitations and the areas where improvement is needed.
Chapter 4: Modified HSTCP: This chapter introduces the first proposed algorithm, MHSTCP, a modification of the HighSpeed TCP algorithm. It describes the algorithm's design, including its mathematical model and the rationale behind its modifications. The chapter presents simulation results obtained using Network Simulator-2, showcasing the performance of MHSTCP under various network conditions. The findings and interpretations section analyzes the results, comparing MHSTCP's performance to existing algorithms and highlighting its improvements in key QoS parameters like bandwidth utilization, delay, and energy consumption.
Chapter 5: Switching TCP: This chapter presents the second proposed algorithm, SwTCP, which utilizes a switching mechanism to adapt to varying network conditions. The chapter details the algorithm's design and operation, outlining its advantages over existing approaches. Like Chapter 4, it presents simulation results and a comprehensive analysis of the findings, demonstrating SwTCP's effectiveness in improving QoS parameters in MANETs. The chapter likely compares and contrasts SwTCP with MHSTCP, potentially highlighting the strengths and weaknesses of each algorithm under different circumstances.
Schlüsselwörter (Keywords)
Quality of Service (QoS), Mobile Ad Hoc Networks (MANETs), TCP Congestion Control, Multimedia Data Transmission, Bandwidth Utilization, Delay, Energy Efficiency, MHSTCP, SwTCP, Network Simulator-2, HighSpeed TCP, NewReno TCP.
Frequently Asked Questions: A Comprehensive Language Preview
What is the main topic of this thesis?
This thesis focuses on improving the Quality of Service (QoS) for multimedia data transmission in mobile ad hoc networks (MANETs) by addressing congestion control issues at the transport layer. The research centers on developing and evaluating novel TCP congestion control algorithms to enhance QoS parameters such as bandwidth utilization, data rate, delay, and energy efficiency.
What are the key objectives of the research?
The key objectives include enhancing QoS in MANETs, developing improved TCP congestion control algorithms, focusing on multimedia data transmission within MANETs, evaluating the performance of the proposed algorithms, and ultimately improving bandwidth utilization, reducing delay, and enhancing energy efficiency.
What are the key themes explored in the thesis?
The key themes revolve around QoS enhancement in mobile ad hoc networks, the intricacies of TCP congestion control algorithms, the specifics of multimedia data transmission in MANETs, performance evaluation methodologies for the proposed algorithms, and the impact on key QoS parameters (bandwidth, delay, and energy efficiency).
What are the chapters and their respective focuses?
Chapter 1: Introduction provides background information on MANETs and the challenges of QoS for multimedia transmission, defining the problem and research objectives. Chapter 2: Literature Work reviews existing literature on TCP congestion control and multimedia data processing in MANETs. Chapter 3: TCP Congestion Control Techniques delves into details of various TCP variants and their performance under congestion. Chapter 4: Modified HSTCP introduces the first proposed algorithm, MHSTCP, with simulation results and analysis. Chapter 5: Switching TCP presents the second proposed algorithm, SwTCP, also with simulation results and analysis.
What algorithms are proposed and what are their key features?
The thesis proposes two algorithms: MHSTCP (Modified HighSpeed TCP), a modification of the HighSpeed TCP algorithm, and SwTCP (Switching TCP), which uses a switching mechanism to adapt to varying network conditions. Both algorithms aim to improve QoS parameters in MANETs.
What tools and techniques are used for evaluation?
The performance of the proposed algorithms is evaluated using Network Simulator-2. The evaluation focuses on key QoS parameters such as bandwidth utilization, delay, and energy efficiency, comparing the performance of the new algorithms against existing techniques like HighSpeed TCP and NewReno.
What are the key keywords associated with this research?
Key words include Quality of Service (QoS), Mobile Ad Hoc Networks (MANETs), TCP Congestion Control, Multimedia Data Transmission, Bandwidth Utilization, Delay, Energy Efficiency, MHSTCP, SwTCP, Network Simulator-2, HighSpeed TCP, and NewReno TCP.
What is the overall contribution of this thesis?
The thesis aims to contribute novel TCP congestion control algorithms (MHSTCP and SwTCP) designed to enhance QoS for multimedia data transmission in challenging MANET environments. The rigorous evaluation and comparison with existing algorithms provide valuable insights into improving the efficiency and reliability of multimedia communication in these networks.
- Quote paper
- Dr. Gururaj H L (Author), 2019, QOS Aware TCP Congestion Control Variants for processing Multimedia Data in mobile adhoc Networks, Munich, GRIN Verlag, https://www.grin.com/document/979695
