Wireless Mesh Networks (WMN) is a popular communication paradigm due to its low cost and rapid deployment. A large-scale WMN needs a look-up structure to support storage, client mobility and generic services. A Distributed Hash Table (DHTs) spreads construction and maintenance load of abstract index infrastructure over participating nodes, providing simple data access interface. The existing Lo...

This paper proposes a novel service configuration approach that can realize dynamic critical Quality of Service (QoS) adaptation to ever-changing and resource-limited ubiquitous computing environments. In the approach, service configuration is reduced to a Fuzzy Control System (FCS) which aims to achieve critical QoS variations on minimal level with less power cost. Two configuration strategies...

IEEE 802.16 is a standardisation for a broadband wireless access in metropolitan area networks (MAN). Since the IEEE 802.16 standard defines the concrete quality of service (QoS) requirement, a scheduling scheme is necessary to achieve the QoS requirement. Many scheduling schemes are proposed with the purpose of throughput optimisation and fairness enhancement, however, few scheduling schemes s...

The essence of Grid Computing is to provide efficient Resource on Demand (RoD). This paper addresses this challenge from the perspective of network, the living platform of Grid, by providing effective Quality of Service (QoS) mechanisms (both IntServ and DiffServ) inside the Grid networking environment. Particularly, the efficiency of this QoS mechanism is maximized by policy-based management t...

We have designed and implemented a system that permits the measurement of network Quality of Service (QoS) parameters. This system allows us to objectively evaluate the requirements of network applications for delivering user acceptable quality. We use FastEthernet taps to monitor full-duplex traffic and programmable network interface cards to extract all the information needed to compute the n...

In order to achieve the best application-level Quality-of-Service (QoS), multimedia applications need to be dynamically tuned and reconfigured to adapt to fluctuating computing and communication environments. QoS-sensitive adaptations are critical when applications run in general-purpose systems, with no mechanisms provided for supporting resource reservations and real-time guarantees. Such ada...

In this paper, we introduce an XML-based Hierarchical QoS Markup Language, called HQML, to enhance distributed multimedia applications on the World Wide Web (WWW) with Quality of Service (QoS) capability. The design of HQML is based on two observations: (1) the absence of a systematic QoS specification language, that can be used by distributed multimedia applications on the WWW to utilize the s...

One of the key mechanisms for QoS provisioning is the call admission control, which manages system resources based on application QoS requirements. To address the QoS provisioning issue in the multimedia wireless network, we have proposed a conservative and adaptive QoS (CAQoS) provisioning model. CAQoS is designed to optimize the existing CAC scheme based on two parameters, which are the conse...

With the development of computer network, both quality of service (QoS) and security of service are more and more concerned by customers. However, QoS may descend evidently by the deployment of security, because security mechanisms always induce extra resource consumption. In order to meet the requirement of real-time and secure multimedia applications, this paper proposes a novel model, named ...

In a wireless LAN (WLAN) based on IEEE 802.11, supporting multiple classes of services with QoS constraints in MAC layer is very important. In this paper, we propose a class-based analytical model to support multiple traffic classes. Through investigating the relationship between access control parameters, such as contention window (CW) sizes and inter-frame space (IFS) under QoS constraints, w...