Performance validation of MAC protocols in underwater acoustic networks

Zhao, Qichao; Lambert, Andrew; Benson, Craig R.

doi:10.1145/2532378.2532390

Cited by 6 publications

(3 citation statements)

References 19 publications

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“…Although ALOHA based protocols exploit the full bandwidth of the system, frequent collision leads to a low throughput and high energy consumption, due to lack of coordination. The logical next step of including carrier sensing in multiple access (CSMA) to mitigate collisions is hampered by the long propagation delay that reduces channel utilization dramatically; see [10]. We therefore propose a variation of unslotted CSMA/CA (the baseline 802.11 access protocol) as outlined below.…”

Section: Modified Csma/ca Protocolmentioning

confidence: 99%

A Modified CSMA/CA Protocol for OFDM Underwater Networks

Yin

Roy

Arabshahi

2015

Proceedings of the 10th International Conference on Underwater Networks &Amp; Systems - WUWNET '15

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The underwater acoustic channel continues to present significant challenges to efficient throughput performance of underwater acoustic sensor networks (UASNs) in varying scenarios. As a result, cross-layer approaches that explore joint PHY/MAC strategies are worthy of further exploration. We consider a recent high-speed OFDM modem and propose a new cross-layer solution based on modified CSMA/CA, for a canonical star network topology with few nodes (the most common scenario in UASNs). Some innovations to an adaptive OFDM PHY link are developed to jointly select the modulation, convolutional coding and frequency diversity order (different transmission modes) for matching varying channel conditions. Additionally, receiver logic that disambiguates the cause of packet loss between a) that caused by channel vs. b) that due to collisions is used to modify the ARQ/backoff logic for retransmissions with CSMA/CA random access. Simulation results reveal that the cross-layer design can effectively increase network throughput.

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Section: Modified Csma/ca Protocolmentioning

confidence: 99%

A Modified CSMA/CA Protocol for OFDM Underwater Networks

Yin

Roy

Arabshahi

2015

Proceedings of the 10th International Conference on Underwater Networks &Amp; Systems - WUWNET '15

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“…In [9], the impact of large signal propagation delay on various UASN MAC schemes is evaluated. When a node senses the medium for a potential ongoing communication, the extremely low signal propagation speed prevents the node from detecting an ongoing communication and causes the node to start transmission that leads to the collisions.…”

Section: Related Workmentioning

confidence: 99%

The Feasibility of Exploiting IEEE 802.11n for Addressing MAC Layer Overheads in UASNs

Sayakkara

Lee

Kim

2014

International Journal of Distributed Sensor Networks

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Underwater acoustic sensor networks (UASNs) consist of remotely deployed sensor nodes under sea or other water environments. Due to the extreme limitations faced by radio signals under water, acoustic channels are utilized for communication in such networks. However, UASNs are challenged by the characteristics of underwater acoustic channels such as lower signal propagation speed and higher signal attenuation. On top of such a challenged physical medium, MAC schemes which are designed based on their terrestrial counter parts are required to add extra overheads to the communication channel wasting the limited network resources. MAC layer overheads such as bandwidth wastage for interframe spaces and contention for occupying physical medium put limitations to the maximum reachable throughput of UASNs. IEEE 802.11n has well defined various MAC and physical layer enhancements to overcome throughput barrier in wireless LANs which includes two frame aggregation schemes, namely, A-MPDU and A-MSDU. In this paper, we study the feasibility of applying those frame aggregations well defined in IEEE 802.11n for reducing MAC layer overheads in UASNs. Based on simulation studies, we evaluate that these frame aggregation schemes are applicable in UWSNs.

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“…However, due to larger signal propagation delay, nodes might face problem in detecting any ongoing communication [3,5,7]. Moreover, the variable packet size also affects the signal propagation time which further degrades overall performance [1,2,3,4,7]. The 48-bit MAC may bring few issues such possible duplicates [6] and security violation.…”

Section: Introductionmentioning

confidence: 99%

New Elastic Node Addressing Schemes for Next-Generation Networks

Krishna

Misra

Sivanesan

et al. 2015

2015 IEEE International Conference on Data Science and Data Intensive Systems

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The exponential growth in mobile computing technology has resulted in the form of newer mobile devices with variable features and capabilities. Hence to maximise the utilisation of such devices, the mobile applications also need to be designed with capabilities to address the real-time as well as non-real-time services requirements using virtualization and distributed computing techniques. The prime disadvantage of conventional networks is fixed and inflexible in their operation. Due to their hierarchical architecture, traditional networks are unable to meet the future network requirements such as cloud services and big data analysis that requires classified network traffics based on user demands. Hence, the future network infrastructure has to fulfil few critical criteria such as dynamicity, scalability, adaptability, better quality of service in terms of improved bandwidth and reduced latency. But, the major factor such as node addressing at lower layers could be a critical issue which affects the above mentioned criteria equally. This paper presents a detailed analysis with respect to the consequences of node addressing issues in current networking standards. This paper also suggest some approaches to satisfy the outcomes such as dynamicity, scalability, adaptability and better quality of services for next generation network infrastructures.

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Performance validation of MAC protocols in underwater acoustic networks

Cited by 6 publications

References 19 publications

A Modified CSMA/CA Protocol for OFDM Underwater Networks

A Modified CSMA/CA Protocol for OFDM Underwater Networks

The Feasibility of Exploiting IEEE 802.11n for Addressing MAC Layer Overheads in UASNs

New Elastic Node Addressing Schemes for Next-Generation Networks

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