How to improve energy efficiency of wireless sensor networks(WSNs) is an important problem in the design of
WSNs. For the purpose of the applications of multimedia services, a non-cooperative power control algorithm is proposed
based on the WSNs model of code division multiple access(CDMA). The existence and uniqueness of the Nash equilibrium
are proved for the proposed algorithm. Simulation results show that the problem of node residual energy is considered in
the design of the algorithm. So the algorithm can reduce transmitting power, save node energy and prolong network lifetime
efficiently.