0140-3664/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.comcom.2009.08.015 * Corresponding author. Tel.: +1 514 340 3240x468 E-mail addresses: [email protected] [email protected] (A. Quintero), Samuel.Pierre@po The next generation mobile networks (4G) is expected to integrate a large number of heterogeneous wireless systems. Practically, metropolitan networks will play a...

Testing and evaluating real-world wireless and mobile systems is very difficult. The volatile nature of the wireless medium and mobility complicates their evaluation. The access to system information hindered by the operating system further increases the evaluation of a real-world system. In contrast, a simulator allows to easily set up complex wireless and mobile scenarios, log protocol variab...

Source Specific Multicast (SSM) provides native support for single sender multicast applications. Current proposals for supporting multiple sender applications on top of SSM includes using multiple SSM channels or using an application layer relay mechanism on top of SSM. These approaches have potential scalability or single point of failure problems, respectively. In this paper, we propose netw...

Strategies for knowledge management as well as strategies for ITsystems supporting knowledge management have often been conceived to serve one particular knowledge management paradigm. We argue that in practice there is not one paradigm that suits all needs of all organizations. Considering knowledge management as a measure to further communication in an organization we find that different ways...

a series of sorbents containing various amounts of borate groups were prepared by chemical immobilization ofp-aminoethylphenylboric acid on a copolymer- treated organosilane spacer glass plates. it was found thatbaker's yeast cells selectively adhered to these supports. yeast cells stained with procion red he-3b formeddenser and more stable layer on the copolymer-grafted supports compared onto ...

The project Broadband Radio Access for IP based Networks (BRAIN) is a European project focusing on the provisioning of wireless IP services with fixed network Quality of Service (QoS) support over a HIPERLAN/2 air interface. This paper proposes a generic interface for controlling the QoS features of wireless link layers, discusses the related requirements and design issues, and investigates a p...

This paper presents an add-on Class of Service (CoS) layer for wireless mesh networks. The proposed protocol is applicable for contention-based MACs and is therefore compatible with most of the Wireless Local Area Network (WLAN) and Wireless Sensor Network (WSN) protocols. The protocol has a locally centralized control for managing data flows, which either reserve a fixed bandwidth or are weigh...

In this paper, we propose a framework for QoS support in the IEEE 802.16 Mesh network. For performance improvement over the two basic scheduling schemes recommended in the standard, centralized and distributed scheduling, the framework adopts the idea of BS-controlled route selection and delay-based scheduling. Core mechanisms including mapping of IP QoS classes to 802.16 QoS types, admission c...

Application Layer Multicast (ALM) is an attractive solution to overcome the deployment problems of IP-Multicast. We show how to cope with the challenges of incorporating wireless devices into ALM protocols. As a first approach we extend the NICE protocol, significantly increasing its performance in scenarios with many devices connected through wireless LAN.

Delivering multimedia over wireless Internet is a very challenging task. Multimedia delivery inherently has strict quality-of-service (QoS) requirement on bandwidth, delay, and delay jitter. However, the current Internet can only support best-effort service, which imposes varying network conditions during multimedia delivery. The advent of wireless networks further exacerbates the variance of n...