Abstract:

To study the terminal energy consumption in wireless heterogeneous networks, a semiMarkov chain to reflect the communication states and deduct an analytical energy consumption evaluation model is adopted through the investigation of a terminal’s operation modes. Comparing with the previous works, the proposed model will incorporate all the communication states of a terminal; the probability of successful wireless local area network （WLAN） discovery; and service type. Analysis results show that the energy consumption will increase as the call arrival rate and call holding time increase. Moreover, it is found that the energy consumption is approximately linear with respect to the voice call ratio and the probability of successful WLAN discovery. It is also found that making WLAN module in low energy consumption waiting state does not save terminal energy.

Key words: wireless data communications, wireless heterogeneous networks, energy consumption analysis, semi-Markov chain