Flow control for the available bit rate service in asynchronous transfer mode networks
type: CreativeWork
description: The goal of this thesis is the development and performance analysis of a flow control algorithm for the ABR (Available Bit Rate) service category in ATM (Asynchronous Transfer Mode) networks. ATM is a connection-oriented multiplexing and switching technique, that was developed for broadband-ISDN to transport data and multimedia streams with high bandwidth requirements in one integrated network. In ATM networks data is sent in packets of fixed size, called ATM cells, and Quality of Service (QoS) parameters are guaranteed for each individual connection. Since ATM networks have to support different applications, the ATM Forum (an association of manufacturers, network operators, users, and research institutes) has defined several service categories in its Traffic Management Specification. The ABR (Available Bit Rate) service category allows the use of remaining link bandwidth left unused by other service categories of higher priority. Another advantage of the ABR service is the guarantee of a minimum transmission rate per connection together with a low cell loss rate without the need for a specification of the ABR traffic characteristics. This makes ABR an attractive service category and an important feature of ATM networks. The ABR service category uses a flow control mechanism to adapt the transmission rate of ABR sources to the varying bandwidth left unused. For this, an end-to-end feedback control loop is established, providing information on the current condition of the network nodes (ATM switches) and the allowed transmission rate to the ABR source. If the Virtual Source / Virtual Destination (VS/VD) technique is used at an ATM switch along the network path from the ABR sender to the receiver, this flow control loop is split into two separate segments. The VS/VD switch is acting as an ABR destination for the upstream loop and as an ABR source for the downstream loop. The VS/VD technique offers the advantages of shortening the control loop and the feedback delay as…
abstract: The goal of this thesis is the development and performance analysis of a flow control algorithm for the ABR (Available Bit Rate) service category in ATM (Asynchronous Transfer Mode) networks. ATM is a connection-oriented multiplexing and switching technique, that was developed for broadband-ISDN to transport data and multimedia streams with high bandwidth requirements in one integrated network. In ATM networks data is sent in packets of fixed size, called ATM cells, and Quality of Service (QoS) parameters are guaranteed for each individual connection. Since ATM networks have to support different applications, the ATM Forum (an association of manufacturers, network operators, users, and research institutes) has defined several service categories in its Traffic Management Specification. The ABR (Available Bit Rate) service category allows the use of remaining link bandwidth left unused by other service categories of higher priority. Another advantage of the ABR service is the guarantee of a minimum transmission rate per connection together with a low cell loss rate without the need for a specification of the ABR traffic characteristics. This makes ABR an attractive service category and an important feature of ATM networks. The ABR service category uses a flow control mechanism to adapt the transmission rate of ABR sources to the varying bandwidth left unused. For this, an end-to-end feedback control loop is established, providing information on the current condition of the network nodes (ATM switches) and the allowed transmission rate to the ABR source. If the Virtual Source / Virtual Destination (VS/VD) technique is used at an ATM switch along the network path from the ABR sender to the receiver, this flow control loop is split into two separate segments. The VS/VD switch is acting as an ABR destination for the upstream loop and as an ABR source for the downstream loop. The VS/VD technique offers the advantages of shortening the control loop and the feedback delay as…
author: Cseh, Christian Virgil
language: eng
keywords: info:eu-repo/classification/ddc/004, Informatik, Telekommunikationsnetz, ATM, Dienstgüte, Bitrate, Kontrollfluss, Leistungsbewertung
date published: 2001
date modified: 2026-07-30T19:42:01Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University