Buffer Delay Improvement in Gait-Cycle-Driven Transmission Power Control Scheme for WBAN
Loading...
Date
2020-10-08
Journal Title
Journal ISSN
Volume Title
Publisher
IEEE
Abstract
Due to the dynamic nature of the wireless body area network (WBAN) channels, there is a need for dynamic transmission power control (TPC) to increase their energy efficiency. The existing gait-cycle-driven TPC (G-TPC) successfully achieves this objective, however, it introduces maximum buffer delay equal to the period of the gait cycle. In this study, we investigate the relationship between the potential power saved and the maximum buffer delay in the G-TPC approach. A new approach is proposed based on the transmission window (instead of currently used transmission point) to reduce the maximum buffer delay by
studying the received signal strength indicator (RSSI) gait patterns
collected from 20 subjects. The results indicated that with a slight modification of the protocol, the same power saving can be achieved for 1.2% of the time with less than half of the maximum buffer delay. The study also indicated that, with tolerant power saving requirements, at least half of the gait channels can reduce the maximum buffer delay by more than 38%.
Description
Keywords
Wireless body area network, Transmission power control, Gait cycle, Buffer delay, Energy efficiency