Understanding End-to-End Effects of Channel Dynamics in Millimeter Wave 5G New Radio

Slezak, Christopher; Zhang, Menglei; Mezzavilla, Marco; Rangan, Sundeep

doi:10.1109/spawc.2018.8446037

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…In dense urban scenarios, capacity a key requirement. At the same time, providing satisfactory coverage is challenging at high frequencies due to blockage, as have been experienced in the mmWave bands [11], [12], [51]. Within this area, we consider a hypothetical systems operating at up to four potential frequencies: 6, 12, 18, and 24GHz.…”

Section: B Multi-frequency Outdoor Capacity Gainsmentioning

confidence: 99%

Cellular Wireless Networks in the Upper Mid-Band

Kang,

Mezzavilla,

Rangan

et al. 2024

IEEE Open J. Commun. Soc.

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The upper mid-band -approximately from 7 to 24 GHz -has recently attracted considerable interest for new cellular services. This frequency range has vastly more spectrum than the highly congested bands below 7 GHz while offering more favorable propagation and coverage than the millimeter wave (mmWave) frequencies. In this regard, the upper mid-band has the potential to provide a powerful and complementary frequency range that balances coverage and capacity. Realizing cellular networks that exploit the full range of these bands, however, presents significant technical challenges. Most importantly, spectrum will likely need to be shared with incumbents including communication satellites, military RADAR, and radio astronomy. Also, the upper mid-band is simply a vast frequency range. Due to this wide bandwidth, combined with the directional nature of transmission and intermittent occupancy of incumbents, cellular systems will likely need to be agile to sense and intelligently use large spatial and frequency degrees of freedom. This paper attempts to provide an initial assessment of the feasibility and potential gains of such adaptive wideband cellular systems operating across the upper mid-band. The study includes: (1) a detailed ray tracing simulation to assess potential gains of multi-band systems in a representative dense urban environment and illustrate the value of a wideband system with dynamic frequency selectivity; (2) an evaluation of potential cross-interference between satellites and terrestrial cellular services and interference nulling to reduce that interference; and (3) design and evaluation of a compact multi-band antenna array structure. Leveraging these preliminary results, we identify potential future research directions to realize next-generation systems in these frequencies.

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Section: B Multi-frequency Outdoor Capacity Gainsmentioning

confidence: 99%

Cellular Wireless Networks in the Upper Mid-Band

Kang,

Mezzavilla,

Rangan

et al. 2024

IEEE Open J. Commun. Soc.

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“…The literature also includes some studies analyzing blockage experimentally [7], [8], [25]. The authors in [7] analyzed accurate measurements of human body blockage at 60 GHz with a person that traversed a linear trajectory perpendicular to the direct path between the Transmitter (TX) and the Receiver (RX).…”

Section: State Of the Artmentioning

confidence: 99%

“…An analysis of blockage was performed in [25] to evaluate the effect of blockers on an End-to-End (E2E) application. The authors used a phased array system that measured the channel in multiple directions, in order to fully understand the path diversity.…”

Section: State Of the Artmentioning

confidence: 99%

An Open Framework to Model Diffraction by Dynamic Blockers in Millimeter Wave Simulations

Testolina

Lecci

Traspadini

et al. 2022

2022 20th Mediterranean Communication and Computer Networking Conference (MedComNet)

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The millimeter wave (mmWave) band will be exploited to address the growing demand for high data rates and low latency. The higher frequencies, however, are prone to limitations on the propagation of the signal in the environment. Thus, highly directional beamforming is needed to increase the antenna gain. Another crucial problem of the mmWave frequencies is their vulnerability to blockage by physical obstacles. To this aim, we studied the problem of modeling the impact of second-order effects on mmWave channels, specifically the susceptibility of the mmWave signals to physical blockers. With respect to existing works on this topic, our project focuses on scenarios where mmWaves interact with multiple, dynamic blockers. Our open source software includes diffraction-based blockage models and interfaces directly with an open source Radio Frequency (RF) ray-tracing software.

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“…For example, the authors of [24] investigate how Transmission Control Protocol (TCP) behaves on top of mmWave links, highlighting pitfalls and strategies to improve the overall performance. The state of the art, however, has mostly focused on the interaction between the higher layer of the protocol stack and a physical layer with analog BF [25]. Some evaluations are available for HBF at mmWaves, but focus on simplified full-buffer link-layer evaluations [8], [19], [20], [26].…”

Section: B State Of the Artmentioning

confidence: 99%

Hybrid Beamforming in 5G mmWave Networks: a Full-stack Perspective

Gómez-Cuba¹,

Zugno²,

Kim³

et al. 2020

Preprint

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This paper studies the cross-layer challenges and performance of Hybrid Beamforming (HBF) and Multi-User Multiple-Input Multiple-Output (MU-MIMO) in 5G millimeter wave (mmWave) cellular networks with full-stack TCP/IP traffic and MAC scheduling. While previous research on HBF and MU-MIMO has focused on link-level analysis of full-buffer transmissions, this work reveals the interplay between HBF techniques and the higher layers of the protocol stack. To this aim, prior work on full stack simulation of mmWave cellular network has been extended by including the modeling of MU-MIMO and HBF. Our results reveal novel relations between the networking layers and the HBF MU-MIMO performance in the physical layer. Particularly, throughput can be increased in 5G networks by means of Spatial Division Multiple Access (SDMA). However, in order to achieve such benefits it is necessary to take into account certain trade-offs and the implementation complexity of a full-stack HBF solution.

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Understanding End-to-End Effects of Channel Dynamics in Millimeter Wave 5G New Radio

Cited by 11 publications

References 19 publications

Cellular Wireless Networks in the Upper Mid-Band

Cellular Wireless Networks in the Upper Mid-Band

An Open Framework to Model Diffraction by Dynamic Blockers in Millimeter Wave Simulations

Hybrid Beamforming in 5G mmWave Networks: a Full-stack Perspective

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