Author: Wong, Tak-yuen George
Title: The study of voice transport on local area network
Degree: M.Sc.
Year: 1995
Subject: Local area networks (Computer networks)
Hong Kong Polytechnic University -- Dissertations
Department: Department of Electronic Engineering
Pages: viii, 86, [36] leaves : ill. ; 30 cm
Language: English
Abstract: Speech traffic is sent periodically with periods of typically 20 - 40 msec but occasionally as large as 100 msec. The packets carrying speech are of fixed length in most speech encoding techniques. The delay for voice packets cannot exceed 250 - 300 msec unless echo suppressors are used. No acknowledgement is needed for speech traffic. Traffic load is expected to be very heavy at peak hours in integrated LANs, unlike data networks which are usually underutilized. It is clear that many popular channel access protocols, such as CSMA/CD, are not suitable for integrating voice and data. In this MSc project, a protocol scheme in bounding the access delay of voice channels on the Local Area Networks with random access methodology, such as CSMA/CD, has been proposed. The focus of the proposed protocol scheme has been put on the Media Access Control (MAC) layer in IEEE 802.3 standard for resolving the collisions in random access after voice channels established. The main theme of this proposed scheme is to merge the concepts of time slotting and on-hook / off-hook registration with the random access characteristics for bus topology in LAN. Furthermore, the performance of this proposed idea has been analysed in two approaches : - Theoretical and Mathematical Analysis - Simulation (by SimScript II.5) The analysis has been emphasised on the throughput and access delay in the Local Area Network implementing the proposed protocol scheme. The results reflect the trade-offs between the bounded access delay in voice channels and performance in data channels on the Local Area Network.
Rights: All rights reserved
Access: restricted access

Files in This Item:
File Description SizeFormat 
b12050404.pdfFor All Users (off-campus access for PolyU Staff & Students only)2.68 MBAdobe PDFView/Open

Copyright Undertaking

As a bona fide Library user, I declare that:

  1. I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
  2. I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
  3. I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.

By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.

Show full item record

Please use this identifier to cite or link to this item: