In the near future, first responders such as firefighters might be supported by sensor nodes, both installed before the incident and placed by the responders themselves. To communicate with these sensor nodes, the first responders could be equipped with hand held devices, e.g. PDAs with wireless LAN, additionally equipped with a radio module of the same type as used by the sensor nodes. This scenario enables the usage of the PDAs as mobile communication backbone by the sensor nodes, as well as allowing the first responders to access nodes in the sensor network in an efficient way, both near and far. This paper presents a weighted routing protocol for heterogeneous networks, which could be used in such a scenario.
Abstract. Typical sensor nodes are composed of cheap hardware because they have to be affordable in great numbers. This means that memory and communication bandwidth are small, CPUs are slow and energy is limited. It also means that all unnecessary software components must be omitted. Thus it is necessary to use application specific communication protocols. As it is cumbersome to write these from scratch every time a configurable framework is needed. Copra provides such an architectural framework that allows the construction of application specific communication protocol stacks from prefabricated components.
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