Geir Egeland

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The network reliability and availability in wireless multi-hop networks can be inadequate due to radio induced interference. It is therefore common to introduce redundant nodes. This paper provides a method to forecast how the introduction of redundant nodes increases the reliability and availability of such networks. For simplicity, it is assumed that link(More)
A prerequisite for a widespread and successful deployment of proactive ad-hoc networking technology is its ability to provide easy access to the Internet. Normally, proactive routing protocols provide routing messages that establish default routes to ensure connectivity for outgoing IPv4 packets destined for the Internet. However, mechanisms to ensure(More)
Common user applications cannot run in mobile ad-hoc networks (MANETs) before a method for name resolution is in place. While the Domain Name System (DNS) works well on the fixed Internet, it represents a centralized approach to name resolution, which is not suitable for MANETs. This article refines the framework developed for name resolution in MANETs and(More)
Dynamic resource discovery and service access in an ad hoc multi-mode 4G-system can be a complex task. Since every adaptive client application will have to perform such tasks, it makes sense to implement this functionality in the middleware. This will make service access ubiquitous, and application development simpler and less expensive. This paper presents(More)
The communication performance in wireless networks is often heavily influenced by failures caused by node mobility and radio disturbance. Proactive link-state routing protocols like OLSR and OSPFv3 with wireless extensions (WOSPF) are currently relying on slow re-convergence to restore successful packet forwarding. This may not be appropriate for particular(More)
The links in an ad hoc or wireless mesh network are normally kept alive by the exchange of Hello-messages between neighbouring nodes. These Hello-messages are prone to collisions with traffic from hidden nodes. If several Hello-messages are lost due to overlapping transmissions, the node expecting the Hellomessages erroneously assumes that the link is down.(More)
Due to frequent link failures in multi-hop wireless networks, redundancy can be an important feature. For example, when planning the structure of a backhaul mesh network for public access, it is common to introduce redundant nodes in the mesh network. These are called redundant, because they do not increase the network capacity under normal operation, due(More)
A prerequisite for a widespread and successful deployment of on-demand ad-hoc networking technology is its ability to provide easy access to the Internet. Existing solutions for Internet access are mainly based on modifying mobile IPv4 (MIPv4). An easier approach, yet poorly documented in published material, is to implement network address translation (NAT)(More)