Abstract: As the stochastic network topology and route selection in wireless ad hoc networks,it is complicated to analyze the capacity.The effects of energy constraints on the capacity of wireless ad hoc networks were studied.The network is capable of route aggregating,and the node transmission process is based on slotted contention protocol.Under the assumption that node transmission is triggered when the energy is big enough,a capacity analysis model was proposed based on the closed queueing network.The proposed model considers the details of data,energy buffers and random access protocol,simultaneously.Then the impacts of energy constraints on the random access protocol design parameters were analyzed to optimize the network performance.Finally,the effects of energy constraints on maximum stable throughput,stability region and packet drop rate were evaluated.Simulation results validate the accuracy of the proposed analytical model.

Key words: Wireless ad hoc network,Route aggregate,Energy constraint,Slotted transmission