New PDF release: Context-Based Routing in Dynamic Networks

By Bernd-Ludwig Wenning

ISBN-10: 3834812951

ISBN-13: 9783834812957

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An ontology-based approach is the definition of the Context Ontology Language (CoOL) [SLPF03]. This language can be projected to OWL as well as to the logic language F-Logic. A so-called Aspect-Scale-Context (ASC) model is used to describe the context. g. the distance to a reference point. g. in metres, kilometres or miles, and the valid range of values for the aspect. , for geographic coordinates. As it can easily be seen from the context example, an aspect may have several valid scales, and there must be mapping functions to map between the scales.

In this way, the requests collect the addresses of all nodes on a route as they propagate through the network. Re-broadcasting, however, is only done if the node that received the request did not receive another request with the same source address and sequence number before and if its own address is not in the route request yet. When the destination receives the route request, it creates a route reply that is sent back to the source, either on an already known route, on the reverse route that it knows through the incoming route request, or piggybacked on a route request that is sent out in the reverse direction.

Then a requirements analysis for the specification and design of the protocol is done and the protocol that has been designed based upon the requirements is presented. 1 Formal Description of Context-based Routing This section defines and formalises context, first by providing a look into the state of the art, and then by introducing the definition and terminology used throughout this thesis. 1 State of the Art in Formalisation Formalisation of contextual information into logics was first introduced by McCarthy [McC87], further specified in follow-up publications such as [McC93].

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Context-Based Routing in Dynamic Networks by Bernd-Ludwig Wenning

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