A Multirate Medium Access Control Protocol for Underwater Acoustic Sensor Networks Based on Multicarrier Code Division Multiple Access

作者：Ma, Lujuan^*; Li, Deshi; Nie, Jugen

来源：Sensor Letters, 2013, 11(5): 796-804.

DOI：10.1166/sl.2013.2649

• Sensor Networks
• Underwater
• MAC
• Multirate
• MC-CDMA

It has been revealed that the available bandwidth of underwater acoustic links increases as the link length decreases. In this research, a Multirate Medium Access Control (MR-MAC) protocol for Underwater Acoustic Sensor Networks (UWASNs) is designed, aiming to reduce end to end delay and increase network throughput. Based on Multicarrier Code Division Multiple Access (MC-CDMA) technology, the MR-MAC protocol chooses transmission rates (i.e., the number of sub-carriers) and spreading codes dynamically according to the desired length of links. Under MR-MAC, a negotiation mechanism is adopted to switch transmission rates between different links. And a dynamic subcarrier selection algorithm is proposed to realize multirate. Chaos sequence is used to be the spreading code to improve the Bit Error Rate (BER) performance. Simulation results show that MR-MAC can effectively reduce end-to-end delay and improve network throughput.

• 出版日期2013-5
• 单位井冈山大学; 武汉大学