User interaction based design of low power devices for ad-hoc networks

The design methodology presented in this paper proposes alternative strategies for increasing the battery life of devices in ad-hoc networks. It considers the operation of the device from the user´s perspective in terms of the expected response from the device and how this can be achieved for minimum power consumption. This information is used to specify the operation of the radio network and shutdown procedures for the device so that it still maintains the required response for the user. Application of these strategies gives a very long battery life as demonstrated in an example design.