Date Added: May 2012
In this paper, the authors propose a Medium Access Control protocol (EH-MAC) for multi-hop Energy Harvesting Wireless Sensor Networks (EH-WSNs). In EH-WSNs, the main goal is to match energy consumption with the energy harvesting rate which is different from minimizing energy consumption in battery operated WSNs. Unlike most existing MAC protocols that are designed to extend network lifetime, EH-MAC is designed to achieve high throughput given the varying amount of ambient energy that can be harvested from the environment at different locations and times. EH-MAC is based on asynchronous, receiver-initiated polling; however, unlike traditional random backoff mechanisms, it uses probabilistic polling to reduce data packet collisions.