Feasibility of Mobile Cellular Communications at Millimeter Wave Frequency

Kim, Yungsoo; Lee, Hyun-Yong; Oh, Jung-Hun; Lee, Jaekon; Roh, Wonil; Cheun, Kyungwhoon

doi:10.1109/glocom.2015.7417433

Cited by 11 publications

(9 citation statements)

References 2 publications

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“…The value of RRC connection release time t rc = 50 milliseconds, RRC connection establish time t ec = 100 milliseconds 21 and paging cycle 128 milliseconds. To consider the number of beams at the gNB and at the UE, we have referred to work in References 16,39. We considered three sectors at gNB, with 16 beams at each sector, each beam of beamwidth 7.5° and eight beams at the receiver side 39 .…”

Section: Performance Analysismentioning

confidence: 99%

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Analytical modeling for signaling‐based DRX in 5G communication

Maheshwari

Agiwal

Masud

2020

Trans Emerging Tel Tech

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The millimeter wave (mmWave)‐enabled 5G wireless networks can meet the increasing demands of data rates and mobile subscriptions. However, the mmWave wireless networks require directional beamforming to overcome the propagation and penetration losses. The directional communication in turn increases the user equipment's (UE) energy expenses, as it has to perform beam searching to identify the best beam pair. Discontinuous reception (DRX) is a popular mechanism for energy saving in LTE/LTE‐A networks. The DRX mechanism when applied to mmWave‐5G networks, would also be required to incorporate the beam searching procedure making it less effective. In this article, we propose signaling‐based DRX to improve UE's energy saving in 5G networks by reducing the impediments of beam searching. Though the frequent requirement of beam searching in 5G cannot be avoided, the time in the beam searching can be curtailed if data/paging is absent. We propose to use power saving indication (PSI) that can be applied to both, connected‐ and idle‐state DRX. We employed semi‐Markov model to obtain the probabilistic estimation of power saving and delay for the proposed mechanism. The performance analysis shows that signaling can be used to improve energy saving in 5G DRX by limiting beam searching when not necessary.

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Section: Performance Analysismentioning

confidence: 99%

“…To consider the number of beams at the gNB and at the UE, we have referred to work in References 16,39. We considered three sectors at gNB, with 16 beams at each sector, each beam of beamwidth 7.5° and eight beams at the receiver side 39 . Thus, the UE has to align 16 × 8 = 128 beams to get the best beam pair.…”

Section: Performance Analysismentioning

confidence: 99%

Analytical modeling for signaling‐based DRX in 5G communication

Maheshwari

Agiwal

Masud

2020

Trans Emerging Tel Tech

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“…Beamforming technical is also a solution to address the above problems. However, some existing research on mmWave communication is always under the assumption that the service area is covered by uniform beamforming (Kim et al, 2016;Va et al, 2015). This assumption may be unsuitable for HSR scenario that the network topology is linear.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Beamforming and Power Allocation for mmWave Communication in High‐Speed Railway

et al. 2021

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Millimeter wave (mmWave)-based massive multiple-input multiple-output (MIMO) beamforming technology is one of the key technologies in the fifth-generation (5G) network. In this paper, we apply mmWave to high-speed railway (HSR) communication scenario to meet its increasingly growing demands for tremendous data rate and reliable mobile services. The HSR mmWave communication system uses a control/user (C/U) plane separation structure; that is, control information and user information are transmitted through the high-frequency micro base station (BS) and the low-frequency macro BS, respectively. Then, an optimized beam width and power allocation scheme is proposed, which is combined with the mobile relay (MR) technology to utilize the architecture of the large-scale antenna beamforming. In the proposed scheme, we introduce a power factor related to the change of train speed. According to the power factor, the service beam width is adjusted dynamically and the transmit power of the beams from two simultaneously served mmWave access points (APs) is jointly calculated. Simulation results show that, compared with the traditional uniform beam width scheme, the proposed adaptive beam width and power allocation scheme can maximize the total service volume within the maximum transmit power range.

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“…The fifth-generation (5G) mobile communication networks aim to support massive number of devices with higher capacity, data rate, less latency, improved spectral energy, and cost considerations [1,2]. However, the sub-6 GHz frequency bands in mobile communication systems are insufficient to meet the increasing data rate demand in the upcoming 5G communication system [3].…”

Section: Introductionmentioning

confidence: 99%

Impact of Users' Finger on the Amount and Direction of Radiated Power From a 28 GHZ 4-Element Mimo Antenna Mobile Terminal

Elshirkasi¹,

Al‐Hadi²,

Soh³

et al. 2020

PIER C

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This paper investigates the effect of index finger position and distance on the radiated power of 4-element MIMO antenna, operating at 28 GHz. The antenna elements (AEs) are located at the top corner of the user terminal and separated at a distance of half a wavelength. Four different finger placements were investigated, one placement over each AE with six interaction distances between the AEs and the finger at each position starting from 0 up to 2.5 mm. When the finger is placed on an edge AE, the other edge AE maintained above 85% of its free space radiated power irrespective of the interaction distance. However, the radiated power of each AE was severely affected when the finger was placed on it or on the AE adjacent to it. This effect ranged from total blockage at direct interaction with the element (with a distance of 0 mm) to maintaining more than around 60% of free space radiated power after the interaction distance is increased to more than 2.0 mm. Besides the effects of the index finger on the amount of radiated power, this work also investigated the direction of radiated power resulting from the influence of this finger.

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Feasibility of Mobile Cellular Communications at Millimeter Wave Frequency

Cited by 11 publications

References 2 publications

Analytical modeling for signaling‐based DRX in 5G communication

Analytical modeling for signaling‐based DRX in 5G communication

Adaptive Beamforming and Power Allocation for mmWave Communication in High‐Speed Railway

Impact of Users' Finger on the Amount and Direction of Radiated Power From a 28 GHZ 4-Element Mimo Antenna Mobile Terminal

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