IEEE 802.11ay-Based mmWave WLANs: Design Challenges and Solutions

Zhou, Pei; Cheng, Kaijun; Han, Xiao; Fang, Xuming; Fang, Yuguang; He, Rong; Long, Yan; Liu, Yanping

doi:10.1109/comst.2018.2816920

Cited by 171 publications

(97 citation statements)

References 49 publications

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“…Even for the mmWave multi-user MIMO (MU-MIMO) case, X-Array's three key mechanisms can serve as essential facilitating functions. Practical mmWave MU-MIMO protocols need to separate the analog beamforming and digital beamforming in two steps [45]. The former still heavily relies on the angular estimation and beam selection to narrow down the beam search space and then identify the best beam on each array for each user.…”

Section: Discussionmentioning

confidence: 99%

X-Array

Wang

Huang

Zhang

et al. 2020

Proceedings of the 26th Annual International Conference on Mobile Computing and Networking

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Millimeter-wave (mmWave) networks are conventionally considered to bear a fundamental coverage limitation, due to the directional beams and limited field-of-view (FoV) of the phased array antennas. In this paper, we explore an array of phased arrays (APA) architecture, which aggregates co-located phased arrays with complementary FoVs to approximate WiFi-like omni-directional coverage. We found that straightforwardly activating all the arrays may even hamper network performance. To fully exploit the APA's potential, we propose X-Array, which jointly selects the arrays and beams, and applies a dynamic co-phasing mechanism to ensure different arrays' signals enhance each other. X-Array also incorporates a link recovery mechanism to identify alternative arrays/beams that can efficiently recover the link from outage. We have implemented X-Array on a commodity 802.11ad APA radio. Our experiments demonstrate that X-Array can approach omni-directional coverage and maintain high performance in spite of link dynamics. CCS CONCEPTS • Hardware → Wireless devices; Analysis and design of emerging devices and systems; • Networks → Network experimentation; Network mobility;

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Section: Discussionmentioning

confidence: 99%

X-Array

Wang

Huang

Zhang

et al. 2020

Proceedings of the 26th Annual International Conference on Mobile Computing and Networking

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“…This section of the article has focused on papers that have been dedicated to mmWave communications for 5G wireless communication networks. The section observed papers regarding different characteristics of mmWave and utilization of mmWave to serve the purposes of 5G including the of Rangan et al [25], Xiao et al [26], Niu et al [27], Rappaport et al [28], Hemadeh et al [29], Rappaport et al [30], Zhou et al [31], and Jameel et al [32] briefly discussed on topics relevant to the 5G mmWave communications. Table I has described those papers in brief.…”

Section: G Mmwave Communicationsmentioning

confidence: 99%

UAV Assisted 5G Het-Net: A Highly Supportive Technology for 5G NR Network Enhancement

Mahbub¹

2020

EAI Endorsed Transactions on Internet of Things

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Recently, unmanned aerial vehicles (UAVs) have grabbed impressive attention from industry and research network, because of the faster growth in a wide scope of applications. Especially, UAVs are being utilized to ensure a better solution to a dependable and costeffective wireless communication network from the sky. The adoption of UAVs has been considered as an alternative supplement of existing cellular networks, to accomplish better transmission efficiency with enhanced coverage and network capacity. This article has represented some wireless communication scenarios where UAVs can be utilized to ensure better coverage, enhancement of efficiency and capacity. After that, to establish the effectiveness of UAVs in wireless communication the paper has included several performance scenarios (path loss, attenuation, and data rate) after utilizing UAVs in the wireless network. Finally concluded with discussing several challenges for UAV assisted wireless networks and the scopes of further enhancement of such kind of networks. This article might be informative to those who are engaged in research regarding UAV assisted wireless communication.

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“…Authors in [28] introduce the concept of an exclusive region to enable concurrent transmission with significant interference reduction in mmWave WPANs, by considering all kinds of directional and omnidirectional transmission/reception antenna patterns. In IEEE 802.11 Wireless Local Area Networks (WLANs) for mmWave, IEEE 802.11ad [14] and IEEE 802.11ay [29], [15] use Carrier Sense Multiple Access (CSMA) and have adopted asynchronous CCA that is implemented omnidirectionally, while the contention window status is maintained per beam. In [30], a distributed MAC protocol is proposed for CSMA-based mesh networks, which employs memory at the nodes to achieve approximate TDMA schedules without explicit coordination.…”

Section: Introductionmentioning

confidence: 99%

New Radio Beam-Based Access to Unlicensed Spectrum: Design Challenges and Solutions

Lagén

Giupponi

Goyal

et al. 2020

IEEE Commun. Surv. Tutorials

101

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Licensed-Assisted Access (LAA) enabled LTE operators to access unlicensed spectrum while adhering to Listen-Before-Talk (LBT) requirements. LAA is based on enhancements over 4G LTE technology. Differently, 5G New Radio (NR) technology is being designed from the start to support operation in unlicensed bands through a technology referred to as NRbased access to unlicensed spectrum (NR-U). A large amount of unlicensed spectrum has been allocated in millimeter-wave (mmWave) bands, making it an attractive candidate for NR-U. However, the propagation characteristics in mmWave often require beam-based transmissions. Beam-based transmissions enhance spatial reuse, but also complicate interference management due to the dynamic nature of the directional antennas. Therefore, some major design principles need to be revisited in NR-U to address coexistence. This paper elaborates on the design challenges, opportunities, and solutions for NR-U by taking into account beam-based transmissions and the worldwide regulatory requirements. In particular, different problems and the potential solutions related to channel access procedures, frame structure, initial access procedures, HARQ procedures, and scheduling schemes are discussed.

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IEEE 802.11ay-Based mmWave WLANs: Design Challenges and Solutions

Cited by 171 publications

References 49 publications

X-Array

X-Array

UAV Assisted 5G Het-Net: A Highly Supportive Technology for 5G NR Network Enhancement

New Radio Beam-Based Access to Unlicensed Spectrum: Design Challenges and Solutions

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