Computational Geometry Algorithms and Applications, 2nd by Berg etc

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Extra info for Computational Geometry Algorithms and Applications, 2nd Edition

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For these algorithms to terminate, nodes in the sensor network must remember which messages have been previously received. In ref. [50], the authors present two distributed routing protocols, face routing and greedy-face-greedy (GFG). Both algorithms guarantee packet delivery as long as the wireless sensor network remains connected and static while the message is relayed from sender to receiver. The medium access is ideal since it guarantees message transmission between two neighbors in a finite time.

Data relayed to the base station are stored in a database and made available over the Internet. 7 System architecture for habitat monitoring. These collected data are also relayed, via satellite transceiver, to an off-site research facility located in Berkeley, California. Periodically, motes took readings from each of their sensors. The data were time-stamped and kept in flash memory. Readings were then transmitted in a single 36-byte data packet. After successful transmission, motes entered their lowest power state for the next 70 seconds.

Forwarding to the neighbor node closest to the destination) is applied as long as the node currently holding the packet has a neighbor closer to the destination node than itself. When current node A does not have such a neighbor, face routing is applied until a node B, closer to the destination node than node A, is encountered. Node B then reverts back to greedy forwarding. This reversal of modes can be repeated until the packet is delivered to its intended destination. Greedy perimeter stateless routing (GPSR) [51] is a routing protocol similar to GFG [50] that incorporates medium-access-layer and mobility considerations.

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