Towards Coexistence of Cellular and WiFi Networks in Unlicensed Spectrum: A Neural Networks Based Approach

Alsenwi, Madyan; Yaqoob, Ibrar; Pandey, Shashi Raj; Tun, Yan Kyaw; Bairagi, Anupam Kumar; Kim, Lokwon; Hong, Choong Seon

doi:10.1109/access.2019.2933323

Cited by 21 publications

(15 citation statements)

References 16 publications

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“…Whereas, the system model we consider in this work is based on the uplink communication and employs a time division multiplexing based solution. Hence, the perspective of resource sharing is different in comparison to [40] and [41]. Note that we do not advocate that one model is better than the other and believe that different access schemes are designed to serve different purposes.…”

Section: A Related Workmentioning

confidence: 91%

“…The work in [40] considers LTE supplemental downlink (SDL) methodology which is used only in the downlink to support higher downlink support for LTE stations. The work in [41], on the other hand, employs an alternating slot assignment model which assigns different time slots to LTE-U BS or Wi-Fi stations. Whereas, the system model we consider in this work is based on the uplink communication and employs a time division multiplexing based solution.…”

Section: A Related Workmentioning

confidence: 99%

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Performance-Fairness Trade-off for Wi-Fi and LTE-LAA Coexistence

2021

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Long Term Evolution (LTE)-License Assisted Access (LAA), which leverages unlicensed resource sharing with the Wi-Fi network, is a promising technique to address the spectrum scarcity issue in present and future wireless networks. However, unlicensed spectrum sharing between Wi-Fi and LAA requires fair resource allocation with specific performance guarantees for both sets of Wi-Fi and LAA stations. In this paper, an optimal communication policy is devised for LAA stations coexisting on a single unlicensed channel with Wi-Fi stations. The inter-network collisions are avoided through nonoverlapping transmission phases for Wi-Fi and LAA networks. The throughput performance of LAA network is maximized while guaranteeing a proportionally fair performance among LAA stations and a fair share for Wi-Fi stations. The proposed scheme, unlike the state-of-the-art coexisting mechanism, jointly optimizes the transmission probability and the transmission rate for each LAA station. The formulated optimization problem to maximize network throughput is solved analytically. The numerical results demonstrate a significant improvement in the LAA throughput, more than 75 %, as compared to the case when transmission probabilities are not optimized. Moreover, a notable gain of 8 − 9 % in the fairness index reflects the intranetwork fairness of the proposed LAA network over the conventional LAA network.INDEX TERMS Licensed assisted access (LAA), Wi-Fi, proportional fairness, random channel access, transmit power control.

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Section: A Related Workmentioning

confidence: 91%

Section: A Related Workmentioning

confidence: 99%

Performance-Fairness Trade-off for Wi-Fi and LTE-LAA Coexistence

2021

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“…Besides, no similar work is found in the literature for comparison. In [17], the authors suggested a new mechanism based on neural networks for the coexistence of an LTE-U base station in the unlicensed spectrum accompany by WiFi-6 access points. The obtained numerical results in this paper show that the suggested algorithm can provide the way for LTE-U base station to work efficiently in the unlicensed spectrum while protecting Wi-Fi users with 90% fairness.…”

Section: Related Workmentioning

confidence: 99%

Performance Evaluation of 5G/WiFi-6 Coexistence

Zreikat

2020

International Journal of Circuits, Systems and Signal Processing

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The fifth-generation mobile communication network (5G) is the promising technology nowadays to provide not only a higher speed compared to 4G but also a revolution of services to cover different industrial sectors such as health, production, energy, and many. WiFi-6 is a new wireless local area network (WLAN) technology that is suitable to work in an office, home, and dense areas. As a new technology, 5G has some limitations concerning coverage and capacity. To overcome these limitations, one possible solution is to use the free unlicensed spectrum available in Wi-Fi technology, therefore, a complement solution of 5G/WiFi-6 coexistence is proposed to make both technologies complement each other in providing a better quality of service for the end-user concerning a higher speed, low latency, and higher capacity. According to OFDM modulation, the proposed model divides the cell into two virtual zones, the inner zone represents WiFi-6 technology surrounded by 5G technology. All resources will be shared between the two technologies taken into consideration that more bandwidth should be given to the most inner zone with high intensity of traffic. The call admission control algorithm will be based on a minimum bit rate to be given to each zone that should be satisfied to admit the call. The model is solved using MOSEL-2 simulation language, to study different performance parameters such as BER, utilization, blocking probability, latency, throughput, and aggregate average bit rate in both zones. The simulation results show that coexistence causes some degradation in 5G performance, however, a positive effect on the overall cell performance is achieved by balancing the load all over the whole cell.

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“…allocation of spectrum in the 37 GHz bands for shared access and above 90 GHz for unlicensed access. Since Long Term Evolution (LTE) Release-13, cellular communications have expanded their paradigm of operation to the unlicensed spectrum bands [6], [7]. For LTE, the main focus has been on the unlicensed 5 GHz bands, for which multiple LTE variants are currently available, namely Licensed-Assisted Access (LAA) (in 3GPP Release-13, 14 and 15) [8]- [12], LTE Unlicensed (LTE-U) (developed by the LTE-U Forum based on LTE Release-12) [6], [13] and MulteFire (developed by the MulteFire Alliance based on LTE Release-14) [14], [15].…”

Section: Introductionmentioning

confidence: 99%

NR-U and IEEE 802.11 Technologies Coexistence in Unlicensed mmWave Spectrum: Models and Evaluation

et al. 2020

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New Radio-based access to Unlicensed spectrum (NR-U) intends to expand the applicability of 5G NR access technology to support operation in unlicensed bands by adhering to Listen-Before-Talk (LBT) requirement for accessing the channel. As the NR-U specification is being developed, simulations to assess the performance of NR-U and IEEE 802.11 technologies coexistence in unlicensed spectrum bands are crucial. In this paper, we report on extensions to a popular and open source network simulator, ns-3, to build an NR-U system-level simulator and to model the NR-U and IEEE 802.11 technologies coexistence in the currently available unlicensed spectrum bands. The proposed NR-U model capitalizes on an NR Release-15 based model that has been extended to operate in unlicensed bands, while meeting its regulatory requirements. For the coexistence analysis, we pay particular attention to the millimeter-wave bands and provide a complete set of simulation campaigns evaluating the coexistence of NR-U and IEEE 802.11ad Wireless Gigabit (WiGig) in the 60 GHz bands. In particular, we focus on determining whether NR-U fulfills its coexistence objective in terms of a fairness criterion by testing different NR-U parameters, such as the numerology, the bandwidth, the channel access scheme, the energy detection threshold, and the beamforming method.

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Towards Coexistence of Cellular and WiFi Networks in Unlicensed Spectrum: A Neural Networks Based Approach

Cited by 21 publications

References 16 publications

Performance-Fairness Trade-off for Wi-Fi and LTE-LAA Coexistence

Performance-Fairness Trade-off for Wi-Fi and LTE-LAA Coexistence

Performance Evaluation of 5G/WiFi-6 Coexistence

NR-U and IEEE 802.11 Technologies Coexistence in Unlicensed mmWave Spectrum: Models and Evaluation

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