sensor nodes characteristics, the physical deployment of the WSNs and the WSNs’ information function . Firstly the sensor nodes are characterized particularly by their limited power and memory capacities. The power is used to be a key parameter for any approach supposing that sensor nodes’ batteries are unchangeable and not rechargeable. The power would influence the reliability of the network, if the residual battery of an important node, as a cluster head, is limited. Respecting the residual battery of the node leads to a more efficient routing path, cluster head designation, aggregation point selection, etc. The limited memory is also a very important parameter as it defines the size of the operating system and the processing code. It also defines the amount of information that a node is able to store. For example, this parameter has to be managed in a mobile sink s.

Thank You Hussein Lafta!