Connection Oriented Isochronous Services in a DQDB Network: Specification of a Service-protocol pair and a Bandwidth Allocation Scheme
Guy Juanole, Rosa L. R. Carmo, Francisco Vasques · 1995
This paper addresses the problem of transmitting real-time isochronous traffic in a DQDB network using the Pre-Arbitrated (PA) access. In the DQDB standard, a framework is defined to provide connection-oriented isochronous services using PA access. In this framework, mechanisms as a bandwidth allocation scheme, to provide guaranteed bandwidth to real-time applications, are not provided. Furthermore only guidelines of a signaling protocol to establish/release isochronous connections are given. The goal of this paper is twofold: to specify a service-protocol pair for establishing/releasing isochronous connections and to define a bandwidth allocation scheme for a set of isochronous connections to guarantee a hard real-time isochronous service. The bandwidth allocation scheme consists of an off-line centralized scheduling algorithm and an on-line mode change algorithm which allows to take into account load changes.