Measurement-Based Coexistence Studies of LAA &amp; Wi-Fi Deployments in Chicago

Sathya, Vanlin; Rochman, Muhammad Iqbal; Ghosh, Monisha

doi:10.1109/mwc.001.2000205

Cited by 45 publications

(33 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interplay between traffic classes and their effective throughput and average contention delay have been investigated in [27] [28]. Authors in [29] also conducted real measurements to evaluate the performance of LAA PCs under different traffic profiles in Chicago area.…”

Section: B Operation Of Incumbent Systemsmentioning

confidence: 99%

5G New Radio Unlicensed: Challenges and Evaluation

Hirzallah

Krunz

Kecicioglu

et al. 2021

IEEE Trans. Cogn. Commun. Netw.

View full text Add to dashboard Cite

To meet the high demand for mobile data, the Third Generation Partnership Project (3GPP) established a set of standards known as 5G New Radio (5G NR). The architecture of 5G NR includes a flexible radio access network and a core network. 3GPP has also been working on a new radio access technology, called 5G NR Unlicensed (5G NR-U), which aims at extending 5G NR to unlicensed bands. In this paper, we give an overview of the most recent 5G NR-U design elements and discuss potential concerns, including fair coexistence with other unlicensed technologies such as Wi-Fi. We use simulations to study coexistence between Wi-Fi and 5G NR-U systems. Our evaluation indicates that NR-U often achieves higher throughput and lower delay than Wi-Fi (802.11ac). The two systems experience different buffer occupancies and spectrum utilization statistics. We also discuss the improvements that NR-U offers over LTE Licensed Assisted Access (LTE-LAA). I. INTRODUCTION Next-generation wireless networks will support applications with widely diverse performance requirements. In its International Mobile Communications (IMT)-2020 recommendations, the International Telecommunications Union (ITU) specifies three use cases for next-generation wireless networks: Enhanced mobile broadband (eMBB), ultra-reliable and low latency communication (URLLC), and massive machine-type communication (mMTC). While these use cases embody different performance requirements, they all share the need for more spectrum. In its effort to extend 5G cellular operation to unlicensed spectrum, 3GPP is initially targeting the Unlicensed National Information Infrastructure (UNII) bands at 5 GHz and 6 GHz. Future specifications will address unlicensed millimeter wave (mmWave) bands at 60 GHz. Wireless systems can operate over unlicensed bands as long as they comply with spectrum regulations, which are intended to ensure harmonious coexistence of various incumbents that operate on the same band. The ubiquity of Wi-Fi networks makes achieving harmonious 5G NR-U and Wi-Fi coexistence a key objective for NR-U designers. To ensure fairness in channel access, NR-U should not impact an existing Wi-Fi system more than the impact of another Wi-Fi system [1]. Early works surveying 5G NR-U can be found in [2]-[5]. These works focused on pre-standard NR-U operation at sub-6 GHz and/or mmWave frequencies and discussed the feasibility of utilizing the channel access procedures of 'further enhanced' LTE LAA (feLAA) in 5G networks. The effectiveness of unlicensed bands for IoT applications was investigated in [6], where the authors studied challenges

show abstract

Section: B Operation Of Incumbent Systemsmentioning

confidence: 99%

5G New Radio Unlicensed: Challenges and Evaluation

Hirzallah

Krunz

Kecicioglu

et al. 2021

IEEE Trans. Cogn. Commun. Netw.

View full text Add to dashboard Cite

show abstract

“…Therefore, we limit our system model to the fundamental single 20 MHz (non-aggregate) channel scenario which serves the purpose. Considering a multi-channel scenario with 40 MHz, 80 MHz, or 160 MHz aggregated channels gives rise to interference issues and other challenges which are outside the scope of this work [12]. Note that typically the LAA deployments are for the outdoors and Wi-Fi deployments are for the indoors [46]- [48].…”

Section: System Model a Wi-fi And Laa Coexistence Modelmentioning

confidence: 99%

“…where, F h (•) represents the CDF for the fading channel gain |h | 2 . Transforming (12) in terms of Rayleigh fading channel it becomes an exponential which is expressed as…”

Section: Average Throughput For Laa Stationsmentioning

confidence: 99%

“…In this regard, the latest specifications for tuning the transmission opportunity, which is considered in this work, were discussed in the 3GPP working group meeting in Jan 2020 [11]. Moreover, the recent performance analysis studies such as the one done in [12] have identified many issues with the current coexistence specification. Multiple problems with the current existing releases were reported in [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

2021

View full text Add to dashboard Cite

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.

show abstract

“…Most wireless technologies use the Sub6 frequency band, resulting in colliding signals in the crammed spectrum, which causes poor performance of the systems that rely on the use of the frequency resources, as seen in [2][3][4], where Wi-Fi and LTE signals coexist on the same frequency range. In order to deal with the situation, the 5G standard proposes using the mmWave spectrum, which is used mainly for satellite communications and radar systems and is not as overloaded as the Sub6 bands.…”

Section: Sub6 -Mmwavementioning

confidence: 99%

Design of 5G-oriented patch antennas, a comprehensive survey

Mongi¹,

Giacri²,

Tardivo³

et al. 2021

ICST Transactions on Mobile Communications and Applications

View full text Add to dashboard Cite

With the advent of 5G, higher speeds, more connected users and lower latency are required. To accomplish such goals, new antennas compatible with 5G technology are necessary. Patch antennas, being made of resistant and cheap materials, easy to mass-produce and low profile, represent a solid candidate for deployment in a 5G scenario. This paper aims to serve as a comprehensive guide for designing an antenna using microstrip technology, oriented to provide 5G services. This paper proposes a top-down approach, explaining first the general concepts and orienting the study towards more specific subjects. The topics discussed are the underlying technologies of 5G, patch antennas, circular polarization and array theory. Each topic provides an explanation of its fundamental principles, with an approach intended to be comprehensive instead of technical, and focusing towards giving practical design considerations for a 5G-oriented antenna.

show abstract

Measurement-Based Coexistence Studies of LAA & Wi-Fi Deployments in Chicago

Cited by 45 publications

References 8 publications

5G New Radio Unlicensed: Challenges and Evaluation

5G New Radio Unlicensed: Challenges and Evaluation

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

Design of 5G-oriented patch antennas, a comprehensive survey

Contact Info

Product

Resources

About