| Summary: | 碩士 === 大同大學 === 資訊經營學系(所) === 100 === Media access control (MAC) is one of the most important issues in wireless sensor networks. An efficient MAC protocol can reduce the collision and enhance the throughput of the wireless sensor networks. There are many MAC protocols that have been proposed for terrestrial wireless networks, and handshaking-base protocol is a good idea to solve the hidden-terminal and expose-terminal problems. However, these protocols cannot be applied directly in underwater acoustic sensor network (UASN). Due to the long propagation delay and the low data rate, too many transmissions of control packets will waste channel resources, power and transmission time. In this thesis, considering to enhance the throughput and to reduce the transmission of control packet for handshaking, we propose a receiver-initiated MAC protocol with packet train for UWSN named multi-receiver MAC protocol (MR-MAC). This protocol can let more than two nodes make communication in one handshake held by a main receiver. By coordinating the packet transmission time, data packets will arrive in a packet train manner and receiver can receive packet without collision. In our simulation results, we compare with existing protocols and we show that our protocol increases the throughput and decreases the packet delay.
|
|---|
