The Connection Oriented Data Service (CO service) has been defined by the IEEE 802.6 committee to support variable-bit-rate (VBR) data services over DQDB MANs. The main aim of the CO service is to be able to guarantee the QoS required by a wide variety of VBR services. In this paper, we derive an adaptive bandwidth allocation control mechanism for the DQDB CO Data service. Numerical results dem...

The IEEE 802.16e Broadband Wireless Access (BWA) system is developed to cater for rapidly growing requirement for multimedia wireless services. Since the heterogeneous services provided by the system are connection-oriented, Call Admission Control and required resource reservation mechanisms are needed to achieve desired quality of service (QoS). Traditional admission control algorithms are bas...

We consider single-hop all-optical networks in which wavelength-routed connections (lightpaths) between source-destination pairs are dynamically established and torn down in response to a random pattern of arriving connection requests and connection holding times. A connection request may be blocked if no wavelength is available on a suitable path from source to destination. For these networks ...

Multimedia applications such as video-conferencing, telemedicine, HDTV etc. have very stringent Quality of Service (QoS) demands and require a connection oriented service. For these applications, a path satisfying their requirements in terms of bandwidth, delay, buffer etc. needs to be found. As conventional IP routing is based only on hop counts, it is not suitable for multimedia applications....

Mobile computing environments are characterised by significant and rapid changes in their supporting infrastructure and, in particular, in the quality-of-service (QoS) available from their underlying communications channels. Applications which can operate in these environments and take advantage of changing QoS require distributed systems support platforms. The current state-of-the-art in such ...

Localized QoS routing techniques were proposed to achieve acceptable performance without exchanging global state information over the network. In such techniques, the ingress nodes estimate the network state and make the routing decision locally, hence reducing the signaling traffic at core routers. However, using only locally collected information to make routing decision is not a completely r...

Various routing methodologies are implemented both in connection-oriented and connectionless networks. From the perspective of ATM networks especially those that address issues of QoS and dynamic networks are important ones. ATM was originally developed as a switching standard for support of broadband integrated services in public, switched telephone network. This makes it natural to consider r...

In this paper we consider the problem of providing eecient network support to distributed real-time applications with diierent communication requirements. In the case of resource reservation protocols, the level of eeciency of a transport service connection provided by a communication system is innuenced by the applications requirements, in terms of amount of network resources needed to provide...

We propose a dynamic multipath routing (DMPR) scheme to improve resource utilization of a network for a given quality of service (QoS) in carrying delay sensitive traffic. The proposed scheme takes advantage of available alternate routes which can be used beneficially in communication networks or switches, without increasing the network latency. Through simulation study of circuit-switched, vir...

Packet scheduling disciplines play an important role in providing Quality of Service (QoS) guarantees to applications traffic in high speed networks. Several scheduling disciplines have emerged in the literature that are capable of providing guarantees on various QoS parameters, such as packet delay, jitter, loss and throughput, while maintaining fairness among various connections. However, the...