Breadcrumb

 
 

Performance evaluation of multimedia satellite communications systems using on-board packet switches

Title:

Performance evaluation of multimedia satellite communications systems using on-board packet switches

Bui, Tien Hy (1998) Performance evaluation of multimedia satellite communications systems using on-board packet switches. Masters thesis, Concordia University.

[img]
Preview
PDF
3915Kb

Abstract

Satellite communications systems are ideally equipped to provide future multimedia services on a global level and at a distance-independent cost. In order to meet the ever-growing bandwidth demands of these new applications, satellites employing multiple spot beam antennas are required. An on-board packet switch is an essential element in such a system as it offers full connectivity among users and offers efficient utilization of the space segment. This thesis evaluates the performance of a satellite-switched system in a multimedia environment mainly composed of voice, video, and data sources. Aggregate voice or video traffic is modeled as a 2-state Markov Modulated Poisson Process (MMPP) while two models for aggregate data traffic, MMPP and Pareto Modulated Poisson Process (PMPP) are used to examine the effects of traffic burstiness and long-range dependent behaviour. Multiple Frequency Time Division Multiple Access (MF-TDMA) is utilized on the uplink in conjunction with a dynamic capacity allocation scheme. Higher priority is given to voice and video real-time traffic to avoid delay variation. On-board downlink queue is provided for data jitter-tolerant traffic to achieve high statistical multiplexing gain. Simulation results show that the system can support traffic predominantly composed of real-time applications. As jitter-tolerant data becomes the dominant traffic component and becomes highly correlated, the size of the uplink and downlink queues need to be increased to maintain an acceptable quality-of-service (QoS). The packet loss due to the Knockout contention scheme is much lower than that due to the limited capacity on the uplink and downlink. This makes the Knockout switch fabric attractive for on-board switching since it achieves low complexity. The need for a congestion control scheme that can shape the traffic is required, especially when the traffic has long-range dependent behaviour.

Divisions:Concordia University > Faculty of Engineering and Computer Science > Electrical and Computer Engineering
Item Type:Thesis (Masters)
Authors:Bui, Tien Hy
Pagination:xi, 116 leaves : ill. ; 29 cm.
Institution:Concordia University
Degree Name:Theses (M.A.Sc.)
Program:Electrical and Computer Engineering
Date:1998
Thesis Supervisor(s):Le-Ngoc, Tho
ID Code:460
Deposited By:Concordia University Libraries
Deposited On:27 Aug 2009 13:12
Last Modified:08 Dec 2010 10:14
Related URLs:
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Document Downloads

More statistics for this item...

Concordia University - Footer