Hi Noura,

Maybe you need a model of energy consumption for sensor nodes. See these papers:

1- An Application Specific Protocol Architecture for Wireless Microsensor Networks

2- A particle swarm optimization based method for multi-objective design optimizations

Using such a model, you can report the energy consumption of each sensor node or calculate the network lifetime.

I think that the most common factor related to WSN that is using query-based approach is: the time factor (i.e. the node has  a lifetime of  a certain number of hops after which it dies.'

A node will not generate a query unless it learns a route to the required event. If there

is no route available, the node transmit a query in a random direction.

Then, node waits to know if the query reached the destination for a certain amount of time, after which the node floods the network if no response is heared from the destination.

Dear Hadi and Reema 

Thank you very much for the answer.

Can I also ask for the best scenario for running single query to a sensor networks consider he time factor, How do I measure the energy consumed and the life time of the sensor nodes. ? 

you can measure the energy by probabilistic flooding where each node rebroadcasts

queries with a fixed probability p. Parameter p allows to fine-tune the tradeoff

between energy spent for query dissemination and the number of nodes

reached. Moreover, in most (densely connected)sensor networks there exists a p0 < 1 such that all nodes are reached by the base station. Thus, if the rebroadcast probability p is larger than p0 , 

more queries are forwarded than necessary, and the query dissemination can

save energy by using p0. On the other hand, if p

 Thank you very much for the explanation, I appreciate if you recommend any paper, that explain more on query dissemination. I think that is related to the point I am researching on.

best wishes