Contention Vs. Polling: A Study in Body Area Networks MAC Design
Medium Access Control design for Body Area Networks is challenging due to the uniqueness of the wireless channel characteristics (highly variable in time) and the need for ultra low power while maintaining reasonable performance. Using the authors temporal BAN channel models they study trade-offs created by a mix of two MAC techniques: contention-based access, and polling-based access. By using these techniques at different proportions they see how performance and energy consumption vary. The results reveal design trade-offs in the packet delivery vs. latency vs. consumed energy space.