Current characterisation for ultra low power wireless body area networks

Abstract

The emerging area of body area networks (BAN) imposes challenging requirements on hardware and software to achieve the desired lifetimes for certain devices such as long term medical implants. In this paper, we propose a novel approach to the measurement and characterisation of the energy consumption of BAN devices. The approach uses a low cost energy auditing circuit and addresses the problem of accurately measuring low-level current consumption. This new technique will allow precise and analytical measurements of systems and components in terms of energy. This will help circuit designers minimise power consumption in BAN devices. Software engineers might use this approach to validate and optimise embedded code. Network engineers can optimise network parameters to reduce the power consumption of a single node. Adoption of the proposed technique will aid the development of ultra-low power wireless BANs. Results are presented on current characterisation for two wireless motes

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“…GT 0 contains the transceiver turnaround time pSIFS, synchronisation error tolerance p EIFS and timing uncertainty mClock Resolution; whereas D n indicates the maximum clock drift of the node or the hub relative to an ideal clock over a synchronisation interval SI. (4) Transceiver characteristics: Franco et al [25] use Nordic nRF24L01 + transceiver to conduct an experiment and concludes that the node with the transceiver has five statuses, receive, transmit, idle listen, wakeup and sleep, and different statuses will lead to different energy consumptions, as shown in Table 3. It meanwhile specifies that the transceiver needs 3.13 ms to transfer from the sleeping mode to the working mode [25].…”

“…(4) Transceiver characteristics : Franco et al [25] use Nordic nRF24L01 + transceiver to conduct an experiment and concludes that the node with the transceiver has five statuses, receive, transmit, idle listen, wakeup and sleep, and different statuses will lead to different energy consumptions, as shown in Table 3. It meanwhile specifies that the transceiver needs 3.13 ms to transfer from the sleeping mode to the working mode [25].…”