Challenges in Ad Hoc Networking: Fourth Annual Mediterranean by K. Al Agha, I. Guerin Lassous, G. Pujolle

By K. Al Agha, I. Guerin Lassous, G. Pujolle

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Extra resources for Challenges in Ad Hoc Networking: Fourth Annual Mediterranean Ad Hoc Networking Workshop, June 21-24, 2005, Ile de Porquerolles, France (IFIP International Federation for Information Processing)

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These operations should be done without the intervention of a user or a system administrator, and therefore will have to be selforganizing. Self-organization in this context implies the discovery of neighbors, the creation of connections, the scheduling of transmissions and the formation and re-configuration of the network topology. , Self-organizing Device discovery and Data transmission (SDD) protocol. The SDD protocol makes use of time hopping multiple access, which is an intrinsic feature of UWB-IR.

A. represents the neurons segmentation of the SOM map. Fig. b. represents the sensors network, and shows the sensors clustering. Figs. b represent respectively the variation of the number of sensors alive according to the number of received messages by the BS in the normal scene (400) and the large scene (1000) motes. In each figure, we consider the corresponding variations according to the four scenarios: - Direct transmission from the sensors to the BS. - The clustering according to our approach with the three CH selection criteria already mentioned.

Ol). 3) When the CH is chosen according to the first criterion (maximum energy), the same CHs are reelected after each transmission. 4) until the death of one sensor. 4) Repeat the steps 2) and 3) until the death of all the sensors in the network. 6. a. 6. LEAZC communications To simulate our algorithms, we have used SOMs core (SomToolbox) proposed by HUT researchers" (Helsinki University of Technology). The figures below present the results obtained. Fig. a. represents the neurons segmentation of the SOM map.

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