MACA-U: A Media Access Protocol for Underwater Acoustic Networks

In this paper, we propose and analyze an new MAC protocol based on node pair sequencing (MAP-NPS), which requires node pairs achieved successful handshakes to realize multiple transmissions orderly after one-off RTS-CTS competition. We analyze and assess the protocol’s performance via simulations. Compared to the MACA-U [1] protocol and the PCAP [2] protocol, we show that the new protocol have better performance,which can improve throughput, decrease the propagation delay and reduce hidden terminals and exposed terminals.

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An OFDM based channel aware access protocol for underwater acoustic networks of submarine pipeline monitoring

OCEANS 2015 - MTS/IEEE Washington ◽

10.23919/oceans.2015.7404358 ◽

2015 ◽

Author(s):

Yuzhi Zhang ◽

Haiyan Wang ◽

Xiaohong Shen ◽

Ruiqin Zhao

Keyword(s):

Submarine Pipeline ◽

Access Protocol ◽

Underwater Acoustic ◽

Acoustic Networks ◽

Pipeline Monitoring ◽

Underwater Acoustic Networks

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The Data Link Layer Protocols for Underwater Acoustic Networks

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.490-491.1322 ◽

2014 ◽

Vol 490-491 ◽

pp. 1322-1325

Author(s):

Zhong Zhi Lv ◽

Gui Zhi Sun ◽

Hong Yan Qi

Keyword(s):

Media Access Control ◽

Media Access ◽

Data Link ◽

Link Layer ◽

Underwater Acoustic ◽

Control Protocol ◽

Acoustic Channel ◽

Data Link Layer ◽

Acoustic Networks ◽

Underwater Acoustic Networks

The efficiency of service of Underwater Acoustic Networks is restricted by the acoustic channel characteristic, such as the low bandwidth , high varying multipath and elevated noise levels. In addition, the lifetime of Underwater Acoustic Networks is influenced greatly by the limited battery power. This paper designs an Underwater Acoustic Networks and poses the data link layer protocols including the logical link control protocol and the media access control protocol. The simulation results have demonstrated that the protocols are of certain applicability in underwater acoustic channel environment that maximize throughput and reliability while minimizing end-to-end delay. In the event of low offered load, the protocol can satisfy the requirment of Underwater Acoustic Networks.

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Joint Design of Ranging and Media Access Control in Underwater Acoustic Networks

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.546-547.1261 ◽

2012 ◽

Vol 546-547 ◽

pp. 1261-1269

Author(s):

Zhe Guang Zou ◽

Xiao Mei Xu ◽

Yi Tao ◽

Zhao Tong Zhu

Keyword(s):

Access Control ◽

Media Access Control ◽

Cross Layer Design ◽

Media Access ◽

Underwater Acoustic ◽

Joint Design ◽

Acoustic Networks ◽

Underwater Acoustic Network ◽

Underwater Acoustic Channels ◽

Underwater Acoustic Networks

Due to the unique characteristics of underwater acoustic channels, most wireless protocols need necessary modifications before being applied to underwater acoustic networks. In order to match underwater environment better and achieve higher performance, underwater acoustic networks are calling for cross-layer design with integrated functions implementing. This paper discusses about how to integrate the ranging technique and media access control (MAC) together. Ranging plays a key role in forming a network topology. However, the independent ranging process in an underwater acoustic network requires frequently media access and affects the performance of MAC protocols. In this paper, a joint design of ranging and MAC was proposed to solve the problem. MAC signals are reused to estimate the range. By applying ranging solutions for Aloha and MACAW, good range estimation was obtained in underwater networks. An undersea experiment was carried out to verify this solution. The experimental results show that the joint design of ranging and MAC is capable to work well in underwater acoustic networks.

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