Design of Communication Model Suitable for Implanted Body Area Networks

Recently wireless communication has been developed with nano-size devices by semiconductor technology. By means of transmitting vital data, we can observe the body's conditions and detect any possible problem in the human body at any-time. However, not only power consumption of implanted wireless communication devices with a sensor function (node) but also thermal influence on human body should be consi-dered carefully for implementation of such technology. So, it is difficult to apply current sensor network technology directly to the human body. When implanted nodes communicate, it is expected to raise thermal influence caused by the electromag-netic wave exposure and circuit heat. And power-efficient information gathering is preferable that long term continuous duty for implanted nodes if they cannot be recharged. So, we suggest that a sensor network inside the body takes a cluster-ing form and switching leadership between two nodes in order to control their thermal influence. In this paper, we design a communication model. Specifically, we propose network con-figuration, communication flow, and MAC protocol including alarm mode which is a countermeasure against emergency