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.
Table of Contents
1 Introduction
1.1 Background
1.1.1 Mobile Ad-hoc Networks
1.2 Transport Layer for Ad-hoc Networks
1.2.1 Modified TCP
1.2.2 Cross Layer Solution in TCP
1.3 Transport Layer Protocol for Ad-hoc Networks
1.3.1 TCP over Ad-hoc Network
1.3.2 TCP overview
1.3.3 TCP split Approach
1.3.4 TCP F
1.3.5 TCP Bus
1.3.6 Ad-hoc Transmission Protocol(ATP)
1.4 Congestion control in TCP
1.4.1 Tahoe TCP
1.4.2 Reno TCP
1.4.3 New Reno 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
2.0 Chapter Summery
2 Literature Work
2.1 Background
2.2 Related Work on TCP Congestion Control Variants
2.2.1 High Speed TCP
2.2.2 TCP NewReno
2.3 Related Work on Multimedia Data Processing in MANTETs
2.3.1 UDP Streaming
2.3.2 Multimedia Streaming-HTTP
2.3.3 Content Distribution Network (CDN)
2.3.4 Voice over IP
2.3.5 Multimedia Networking Protocols
2.3.5.1 RTP
2.3.5.2 RTP Protocol Components
2.3.5.3 SIP (Session Initiation Protocol)
2.3.5.4 RTSP(Real Time Streaming Protocol)
2.3.5.5 Multimedia Network Support
2.3.5.6 Dimensioning of Best Effort Networks
2.4 Chapter Summary
3 TCP Congestion Control Techniques
3.1 Background
3.2 TCP Congestion Control Variants
3.3 TCP Variants
3.3.1 New Re-Transmission Mechanism
3.3.2 Congestion Avoidance
3.3.3 Modified Slow- start
3.3.4 TCP- Cubic
3.3.5 TCP-Hybla
3.3.6 Highspeed-TCP
3.3.7 Scalable- TCP
3.3.8 TCP-Westwood
3.3.9 TCP-Veno
3.3.10 TCP-YeAH
3.3.11 TCP-Illinois
3.3.12 H-TCP
3.3.13 TCP-Low Priority (TCP-LP)
3.3.14 Compound-TCP
3.3.15 TCP-Westwood NR
3.4 Result and Discussion
3.4.1 TCP Performance Under Congestion
3.4.2 Packet Drop Rate
3.4.3 Latency
3.4.4 Throughput
3.4.5 Packet Drop Rate
3.4.6 Latency
3.5 Chapter Summary
4 Modified HSTCP
4.1 Background
4.2 Objectives
4.3 M-HSTCP Algorithm
4.4 Mathematical Model
4.5 Simulation Results
4.6 Findings and Interpretations
4.7 Chapter Summary
5 Switching TCP
5.1 Background
5.2 Switching TCP Algorithm
5.3 Simulation Results
5.4 Findings and Interpretations
5.5 Mathematical Model
5.5.1 System Model
5.6 Chapter Summary
6 Switching TCP in Multimedia Data
6.1 Background
6.2 Objectives
6.3 Processing of Multimedia Data using Switching TCP
6.4 Result Analysis
6.4.1 Frame Rate
6.4.2 Frame Loss Rate
6.4.3 Error Rate
6.5 Finding and Interpretations
6.6 Chapter Summery
7 Conclusion
Research Objectives and Topics
The primary goal of this research is to develop and optimize TCP congestion control variants, specifically designed for multimedia data transmission in Mobile Ad Hoc Networks (MANETs). The study addresses the challenges of high bandwidth consumption and network congestion by proposing new algorithms, MHSTCP and Switching TCP (SwTCP), which improve Quality of Service (QoS) parameters such as throughput, delay, packet loss, and energy efficiency.
- Comparison of existing TCP congestion control variants (Tahoe, Reno, NewReno, HSTCP, etc.).
- Development of the Modified High Speed TCP (MHSTCP) algorithm for improved performance.
- Implementation of a Switching TCP (SwTCP) mechanism for dynamic network adaptation.
- Analysis of multimedia data processing parameters (frame rate, loss rate, error rate).
- Simulation-based performance evaluation using Network Simulator 2 (NS2).
Excerpt from the Book
1.1 Background
Network refers to exchanging messages between the people by following some generic protocols. It can be varied depends on the user need and the medium that are connected within it. The growth of network is moving to globe in an unpredictable manner. Similarly, the research in network has been gradually upgrading due to its technology advancements, type of the medium uses, number of participants availing the services and much more. All these bring together creates a lot of research issues still not yet to be resolved. Because, the term ‘Network’ connect the people to wider distances in the form chatting, sharing information, files, documents, greetings, multimedia sharing, file surfing and much more. Generally, Networks can be classified into two categories. Namely, wired networks and wireless networks. Wired type communication uses cables and wires for creating the connection. In the case of wireless, it doesn’t require any such type of cables in establishes the connection. Air and waves play the important medium for that wireless connection.
Now-a-days people are showing much interest in Wireless communication due to its cheaper cost and portable access. Some popular Wireless Networks are, Bluetooth, Wi–Fi, Zig-bee, Wireless Sensor Networks, Mobile Networks, Body Area Networks and so on. Under these, Wireless Network further classified into two major types. One is Infrastructure – based Network and the other one is Infrastructure – less Network.
Summary of Chapters
1 Introduction: Provides an overview of telecommunication networks, specifically focusing on the evolution from wired to wireless ad-hoc networks and the challenges of transport layer protocols in these environments.
2 Literature Work: Reviews existing TCP congestion control variants and studies the specific requirements for processing multimedia data in mobile ad-hoc networks.
3 TCP Congestion Control Techniques: Details the standard mechanisms of TCP congestion control, including slow-start, congestion avoidance, and various popular protocol variants.
4 Modified HSTCP: Introduces the MHSTCP algorithm, designed to improve data rate and efficiency in high-speed network environments.
5 Switching TCP: Presents the Switching TCP (SwTCP) algorithm, which dynamically switches between different TCP variants based on the number of active network users.
6 Switching TCP in Multimedia Data: Applies the SwTCP mechanism to multimedia data processing, analyzing performance metrics such as frame rate, loss, and error rates.
7 Conclusion: Summarizes the research findings, highlighting the improvements in QoS achieved through the proposed algorithms and suggesting directions for future work.
Keywords
MANETs, TCP, Congestion Control, Quality of Service, MHSTCP, Switching TCP, Throughput, Multimedia Data, Bandwidth, Network Simulator 2, Latency, Packet Loss, Wireless Networks, Data Rate, Simulation
Frequently Asked Questions
What is the core focus of this research work?
This thesis focuses on optimizing TCP congestion control protocols to enhance the Quality of Service (QoS) for multimedia data transmission in mobile ad-hoc networks (MANETs).
What are the primary thematic areas addressed?
The research explores congestion control mechanisms, multimedia data processing, network simulation, and the development of new TCP variants tailored for varying network conditions.
What is the main research objective?
The aim is to develop reduced-congestion, delay-aware TCP variants (MHSTCP and SwTCP) that outperform traditional protocols in mobile environments.
Which methodology is employed in the study?
The research uses analytical mathematical modeling and extensive simulations using the Network Simulator-2 (NS2) to verify the performance of proposed algorithms under different network constraints.
What is covered in the main body of the work?
The work covers a detailed review of existing TCP variants, the design of the MHSTCP and SwTCP algorithms, their mathematical formulations, and rigorous comparative simulation results regarding throughput and packet loss.
Which keywords best characterize this work?
Key terms include MANETs, TCP congestion control, Quality of Service, MHSTCP, Switching TCP, and multimedia transmission metrics.
What makes the Switching TCP (SwTCP) algorithm unique?
SwTCP introduces a dynamic switching mechanism that selects the most efficient TCP variant based on the current number of network users, balancing congestion control with high data rates.
How does MHSTCP improve upon existing High Speed TCP?
MHSTCP modifies the response function and window growth parameters of standard HSTCP to achieve higher data rates and better efficiency, particularly for multimedia applications.
What simulation results are highlighted for multimedia processing?
The simulation results indicate that SwTCP significantly improves frame rates and reduces frame loss ratios compared to standard NewReno and HSTCP variants in congested mobile ad-hoc networks.
- Arbeit zitieren
- Dr. Gururaj H L (Autor:in), 2019, QOS Aware TCP Congestion Control Variants for processing Multimedia Data in mobile adhoc Networks, München, GRIN Verlag, https://www.hausarbeiten.de/document/979695
