Seong-Cheol Kim

EEP-MAC: An energy efficient priority-based MAC protocol for Wireless Sensor Networks

In this paper, we present an energy efficient priority-based MAC (EEP-MAC) protocol for energy harvesting Wireless Sensor Networks (WSNs). To provide priority-based data transmission the EEP-MAC uses the modified IEEE 802.15.4 beacon frame. A receiver node periodically wakes up, receives sender beacon frames from its neighbors, and broadcasts a beacon frame containing the selected senders address. A receiver node selects sender node according to senders data priority. Under EEP-MAC protocol, no hidden terminal problem can happen. We show the performance of EEP-MAC through simulations and analytical analysis, and compare it against the previous MACs. Results have shown that our protocol outperforms other MAC in terms of energy consumption, higher priority packet delivery delay.

An adaptive energy-efficient and low-delay MAC protocol for wireless sensor networks

To increase the life of the sensor networks, each sensor node has to conserve energy. Due to the fact that each sensor node has one battery energy to remain alive for long times, energy management is a one of critical issues in wireless sensor networks. In this paper we propose a power efficient and low-delay MAC protocol (MT-MAC, Modified T-MAC) for wireless sensor networks. We first address the protocol design problem and suggest a novel solution based on media access control protocol. The MT-MAC uses network traffics to determine active and sleep periods to save energy and enhances the packet transmission latency. The MT-MAC shows better energy saving than the previous proposed protocols, S-MAC and T-MAC.