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In this article we discuss the use of commonly deployed IP multicast protocols in UMTS networks. We analyze three possible UMTS multicast architectures, all employing standard IP multicast protocols. We study the architectures' ability to handle: group management, data-security, authentication and authorization of multicast source/receivers, multicast(More)
Due to the nature that high datarate leads to shorter transmission range, the performance enhancement by high datarate 802.11 WLANs may be degraded when applying high datarate to an 802.11 based multihop ad hoc network. In this paper, we evaluate, through extensive simulations, the performance of multihop ad hoc networks at multiple transmission datarates,(More)
This paper shows how Multi-Topology (MT) routing is used to maintain three different network topologies in the heterogeneous land mobile network architecture used in the Coalition Network for Secure Information Sharing (CoNSIS) project. The topologies are each associated with one or more quality of service (QoS) classes to provide differentiated QoS in this(More)
—This paper shows how Multi-Topology routing can be used in highly heterogeneous tactical mobile ad hoc networks to improve the network resource utilization. We suggest the usage of a QoS model where a routing protocol maintains several, distinctive network topologies. Each topology is tailored to support either single or multiple QoS-classes. With this(More)
This document lists overall requirements of the ADHOCSYS network. Detailed guidelines are also provided for the future research that will be performed in Work Package 2. A separate deliverable, D5, has been prepared to define detailed requirements and research guidelines for what concerns the power supply management aspects of the network. All potential(More)
—In this paper we propose an architecture for providing multicast services in 3G-cellular networks with the support from local ad hoc networks. The architecture is designed to increase the availability of high data-rate group services to wireless terminals. The architecture is based on a hybrid network which is composed of a central controlled cellular(More)
Due to the fact that high datarate has shorter transmission range, the benefit of using high datarate may be degraded for IEEE 802.11 based multihop ad hoc networks. In this paper, we evaluate the performance of multihop ad hoc networks at multirates, in terms of the number of hops between source and destination, throughput, and end-to-end delay. Through(More)
In this article, we examine some major challenges to be solved in order to provide efficient end-to-end connectivity, resource management and QoS in a tactical military heterogeneous network (including the mobile edge). We briefly describe a selected set of possible solutions and mechanisms to improve inter-domain and intra-domain networking for the(More)