Wireless sensor networks on energy received from radio frequency devices. Since the sensor nodes are always in the process of sensing, energy outage is the common phenomenon among them. In order to reduce this outage of energy, we have proposed Medium Access Control (MAC) protocol. This protocol follows round robin scheduling algorithm. The nodes which are on the verge of outage of energy send recharging request to the master node. During this process, the nodes which are in the way of master node and the requesting node they also hear and repeat the recharging request until the master node replies with a recharging pulse. The performance of the system is evaluated using a probabilistic energy expenditure model. Our results show that the protocol designed gives uninterrupted working networks despite of varying conditions.