To solve the energy conservation and power control problem radically in the cluster based ultra wideband wireless sensor networks

an optimal transmission power selecting algorithm（OTPSA） was presented

the goal of which is

within the acceptable range of implementing cost

to get an optimal transmission power value based on the maximum transmission rate and the background noise level

as well as to achieve the required data transmission rate and to meet the energy conserving requirement to the greatest extent.The implementing feasibility

complexity and cost of the proposed algorithm have been analyzed and investigated in detail.The simulative results clearly show that the power consumed under OTPSA is greatly less than the maximum power gotten at each node

and can be regulated according to the fluctuation of the requirement of maximum rate and the background noise;sensor lifetime can also be prolonged by implementing the proposed scheme.Furthermore

the simulative results also indicate that the implementing cost of the presented algorithm is reasonable and acceptable.