Scalable Cross-Layer Wireless Access Control Using Multi-Carrier Burst Contention

Roman, Bogdan; Wassell, I.J.; Chatzigeorgiou, Ioannis

doi:10.1109/jsac.2011.110112

Cited by 17 publications

(6 citation statements)

References 25 publications

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“…The protocol reduces the use of contention windows (CWs) and improves resource allocation efficiency by proposing a new CCH architecture. Multi-carrier burst contention (MCBC) [99] inspired its creation, which reduces the size of CWs and reduces resource wastage by sequential channel allocation with the traditional TDMA approach. The bandwidth of CCH is divided into sub-channels by OFDM.…”

Section: Ogc Macmentioning

confidence: 99%

An Analysis on Contemporary MAC Layer Protocols in Vehicular Networks: State-of-the-Art and Future Directions

et al. 2021

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Traffic density around the globe is increasing on a day-to-day basis, resulting in more accidents, congestion, and pollution. The dynamic vehicular environment induces challenges in designing an efficient and reliable protocol for communication. Timely delivery of safety and non-safety messages is necessary for traffic congestion control and for avoiding road mishaps. For efficient resource sharing and optimized channel utilization, the media access control (MAC) protocol plays a vital role. An efficient MAC protocol design can provide fair channel access and can delay constraint safety message dissemination, improving road safety. This paper reviews the applications, characteristics, and challenges faced in the design of MAC protocols. A classification of the MAC protocol is presented based on contention mechanisms and channel access. The classification based on contention is oriented as contention-based, contention-free, and hybrid, whereas the classification based on channel access is categorized as distributed, centralized, cluster-based, cooperative, token-based, and random access. These are further sub-classified as single-channel and multi-channel, based on the type of channel resources they utilize. This paper gives an analysis of the objectives, mechanisms, advantages/disadvantages, and simulators used in specified protocols. Finally, the paper concludes with a discussion on the future scope and open challenges for improving the MAC protocol design.

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Section: Ogc Macmentioning

confidence: 99%

An Analysis on Contemporary MAC Layer Protocols in Vehicular Networks: State-of-the-Art and Future Directions

et al. 2021

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“…Unlike OFDM that involves assignment of all the OFDM symbols to a single user, in OFDMA, distinct users can be assigned to different subcarrier sets, providing flexible frequency allocation [54]. In [55], the authors implemented an OFDMA-based MAC contention using FPGA boards. OFDMA is used in mobile communication systems like LTE, 3GPP [56], and wireless metropolitan area networks like 802.16e WIMAX [57].…”

Section: Sdr Implementation Of Ofdm/ofdma-based Systemsmentioning

confidence: 99%

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

Gökçeli

Alakoca

Basaran

et al. 2016

EURASIP J. Adv. Signal Process.

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Benefits of network coding towards enhancing communication quality, both in terms of robustness or data transmission rates, make it a significant candidate as a future networking technology. Conventionally, network coding is mostly used in wired infrastructures, where transmission errors between nodes are negligible. Capturing the provided benefits of network coding via straightforward extension from wired networks to wireless networks is not trivial. In addition to the challenges introduced through the wireless channel impairments, we can also capture the spatial diversity gain provided by the broadcast nature of the wireless channels. In this work, we design and implement a network-coded cooperation (NCC) system that operates in real time through the use of software-defined radio (SDR) nodes for the first time in the literature. We specifically target wireless networks. Our system is based on orthogonal frequency division multiple access (OFDMA) that provides a practical means to enable high transmission rates through the use of narrowband subcarriers. The developed testbed is composed of three source nodes, a relay node and two destination nodes. The transmission of the proposed NCC-OFDMA system is completed in two phases; the broadcast and the relaying phases. Multiplexing of source nodes' signals is achieved through OFDMA technique. In the broadcast phase, an OFDMA signal is transmitted to relay and destination nodes. In the relaying phase, the relay node first detects the OFDMA signal, generates network-coded symbols, and then transmits these symbols to destination nodes. At the end of these two phases, the destination nodes determine the source nodes' signals by using network decoders. The destination nodes make use of both the uncoded and network-coded symbols, which are received in broadcast and relaying phases, respectively. Destination nodes then perform network decoding. Through real-time bit error rate and error vector magnitude measurements, we show that the NCC-OFDMA system can significantly improve the communication quality and robustness, while enabling data transmission between multiple users, as known from theoretical analyses. Some features of this implemented NCC-OFDMA system have the potential to be included in 5G standards, due to the improved radio resource usage efficiency.

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“…It has been noticed in WBAN that all four types of patient data perform contention to access channel and they degrade the network performance in terms of higher data collision and high delay with low data reliability, and sensors consume high amount of energy [27]. The emergency based BMSs should allocate dedicated slots without contention in order to reduce the addressed issues which are the challenging problem for the patient data in WBAN [39].…”

Section: Categorization Of Patient Datamentioning

confidence: 99%

Patient Data Prioritization in the Cross-Layer Designs of Wireless Body Area Network

Ullah

Abdullah

Jan

et al. 2015

Journal of Computer Networks and Communications

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In Wireless Body Area Network (WBAN), various biomedical sensors (BMSs) are deployed to monitor various vital signs of a patient for detecting the abnormality of the vital signs. These BMSs inform the medical staff in advance before the patient’s life goes into a threatening situation. In WBAN, routing layer has the same challenges as generally seen in WSN, but the unique requirements of WBANs need to be addressed by the novel routing mechanisms quite differently from the routing mechanism in Wireless Sensor Networks (WSNs). The slots allocation to emergency and nonemergency patient’s data is one of the challenging issues in IEEE 802.15.4 and IEEE 802.15.6 MAC Superframe structures. In the similar way, IEEE 802.15.4 and IEEE 802.15.6 PHY layers have also unique constraints to modulate the various vital signs of patient data into continuous and discrete forms. Numerous research contributions have been made for addressing these issues of the aforementioned three layers in WBAN. Therefore, this paper presents a cross-layer design structure of WBAN with various issues and challenges. Moreover, it also presents a detail review of the existing cross-layer protocols in the WBAN domain by discussing their strengths and weaknesses.

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Scalable Cross-Layer Wireless Access Control Using Multi-Carrier Burst Contention

Cited by 17 publications

References 25 publications

An Analysis on Contemporary MAC Layer Protocols in Vehicular Networks: State-of-the-Art and Future Directions

An Analysis on Contemporary MAC Layer Protocols in Vehicular Networks: State-of-the-Art and Future Directions

OFDMA-based network-coded cooperation: design and implementation using software-defined radio nodes

Patient Data Prioritization in the Cross-Layer Designs of Wireless Body Area Network

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