Method Of Prioritisation Among IP Packets

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Acknowledgement

I would take this opportunity to thank my research supervisor, family and friends for their support and guidance without which this research would not have been possible.

DECLARATION

I, [type your full first names and surname here], declare that the contents of this dissertation/thesis represent my own unaided work, and that the dissertation/thesis has not previously been submitted for academic examination towards any qualification. Furthermore, it represents my own opinions and not necessarily those of the University.

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Abstract

RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video or simulation data, over multicast or unicast network services. RTP does not address resource reservation and does not guarantee quality-of-service for real-time services. The data transport is augmented by a control protocol (RTCP) to allow monitoring of the data delivery in a manner scalable to large multicast networks, and to provide minimal control and identification functionality. RTP and RTCP are designed to be independent of the underlying transport and network layers. The protocol supports the use of RTP-level translators and mixers. Quality of Service (QoS) prioritizes network traffic and manages available bandwidth so that the most important traffic goes first. QoS is implemented as rules or policies that prioritize packets, optionally change information in the packet header, and assign them to outbound port queues based on their priority. Each switch port has four types of outbound traffic queues based on priority: low, normal, medium, and high. The queue priority determines the order of exit for packets in the queue. For example, packets in a high priority queue leave the switch before packets in other queues.

Table of Contents

ACKNOWLEDGEMENTII

DECLARATIONIII

ABSTRACTIV

CHAPTER 1: INTRODUCTION1

Introducion to the Project1

Aims and objectives2

Methodology3

Deliverables4

Preview of chapters4

Block Diagram5

CHAPTER 2: PROPAGATION OF REAL TIME IP PACKETS6

Routing Real Time (RT) packets6

Prioritisation of RT packets7

QoS and QoE (quality of experience)9

RT packets transition issues16

CHAPTER 3: STATE OF THE ART TECHNIQUES PRIORITISATION FOR PRIORITISATION OF RT IP PACKETS25

Analysis of the G.729 frame loss concealment28

Selective packet marking / prioritization32

System Architecture33

Results35

CHAPTER 4: PRIORITISING RT IP PACKETS BASED ON THEIR LEVEL OF DESPERATION41

CHAPTER 5: DEVELOPMENT ON TECHNIQUE OF LEVEL OF DESPERATION45

CHAPTER 5: DEVELOPMENT ON TECHNIQUE OF LEVEL OF DESPERATION45

CHAPTER 6: EVALUATION, ANALYSIS OF THE TECHNIQUES53

Dependency Matrix Determining Multimedia Applications QOS53

Relationship Levels between All Determinants in the Dependency Matrix56

Mathematical representation of the relationship with a Simulator58

False Positive Rate Comparison60

CHAPTER 7: CONCLUSIONS AND FUTURE WORK61

REFERENCES63

CHAPTER 1: INTRODUCTION

Introducion to the Project

Voice Over Internet Protocol (VoIP) and Internet Protocol (IP) Telephony concepts are hot prospects for the near future. This is because using Internet as a voice delivery mechanism has several advantages over traditional telephone system. An important advantage of VoIP and IP Telephony comes from the capabilities of Internet which not only allows traditional telephone services but also supports video, shared collaboration tools and especially through multicasting, multiparty conferences that can scale from small group meetings to large group audiences. (Bolot, 2008: pp 255)

As transmission and reception of real time data is time critical, for acceptable real-time data delivery, distribution of real time ...