On the impact of LTE-U on Wi-Fi performance

Babaei, Alireza; Andreoli-Fang, Jennifer; Hamzeh, Belai

doi:10.1109/pimrc.2014.7136427

Cited by 53 publications

(6 citation statements)

References 4 publications

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“…The problem of Wi-Fi and D2D-U coexistence and their mutual influence on each other have been widely discussed in recent years, and many different solutions have been proposed. Since the coexistence of LTE-U and Wi-Fi systems is similar to the coexistence of D2D-U and Wi-Fi, we can refer to the studies on the coexistence problem of LTE-U and Wi-Fi, such as [8,[19][20][21][22][23].…”

Section: Related Workmentioning

confidence: 99%

“…As the spectrum of D2D-U is also utilized by other traditional unlicensed networks, including Wi-Fi and Bluetooth, interference management between systems is important. Therefore, we need to solve the problem of how to ensure a fair coexistence between these unlicensed networks; otherwise, D2D-U can cause a huge impact on these traditional unlicensed networks [8,9], which do not consider the coexistence with D2D-U networks. In addition, the MAC layer and physical layer frame structure of the traditional unlicensed networks and D2D-U are different [10].…”

Section: Introductionmentioning

confidence: 99%

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Coexistence Analysis of D2D‐Unlicensed and Wi‐Fi Communications

Wang

Yoshinaga

et al. 2021

Wireless Communications and Mobile Computing

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By enabling direct communications between nearby user equipment (UE), device-to-device (D2D) communication has become one of the key technologies in 5th generation (5G) mobile networks. D2D communication brings new communication opportunities for mobile devices, especially in a highly dense network. In this paper, D2D communication in the unlicensed spectrum, namely, D2D-Unlicensed (D2D-U), is discussed. The use of unlicensed frequency bands can ease the shortage of spectrum resources and improve network performance. However, the D2D-U in 5G has significant effects on the network performance of existing unlicensed networks sharing the same frequency bands, such as Wi-Fi and Bluetooth. Therefore, it is necessary to design a fair coexistence scheme for D2D-U. To understand the coexistence problem, in this paper, we first formulate the network performance of D2D-U and Wi-Fi under two different coexistence schemes, namely, listen before talk (LBT) and duty cycle mechanism (DCM). Then, we use computer simulations to investigate a mode selection scheme that switches between these two schemes and point out the best possible solution for the coexistence between D2D-U and Wi-Fi.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Coexistence Analysis of D2D‐Unlicensed and Wi‐Fi Communications

Wang

Yoshinaga

et al. 2021

Wireless Communications and Mobile Computing

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“…For this reason, some studies have proposed schemes that use unlicensed bands in LTE and apply interference management to the LTE HetNet to ensure higher data rates. Therefore, in LTE Release 13, licensed-assisted access (LAA) and LTE WiFi link aggregation (LWA) technologies, 4,[6][7][8][9][10][11][12] also known as LTE-U and LTE-H, respectively, have been adopted for use with unlicensed bands for LTE and mitigating inter-cell interference. In addition, enhanced inter-cell interference coordination (eICIC) has been proposed to coordinate the interference problems with LTE HetNets in LTE Release 10.…”

Section: Introductionmentioning

confidence: 99%

Coexistence scheme of licensed-assisted access using long-term evolution and wireless local area network for wireless sensor networks

Lee

Eom

et al. 2017

International Journal of Distributed Sensor Networks

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Wireless sensor networks have continuously evolved to provide better services and satisfy user demands. Through this, the number of wireless sensors and the amount of mobile traffic are exponentially growing every year. Long-term evolution technology can effectively resolve the problems caused by traffic growth; however, there are still limitations. Licensed-assisted access using long-term evolution technology has greatly improved the performance of existing longterm evolution heterogeneous networks with carrier aggregation. However, the existing wireless local area network sensor nodes remain a challenge. The licensed-assisted access using long-term evolution access point should efficiently handle the problem of monopolizing spectrum resources used by existing wireless local area network sensor nodes. In this article, we investigate an optimized time slot allocation technique for the coexistence of wireless local area network and licensed-assisted access using long-term evolution sensor nodes. In order to maximize the throughput of each wireless local area network and licensed-assisted access using long-term evolution sensor node in the proposed algorithm, we designed an objective function based on the number of wireless local area network/licensed-assisted access using long-term evolution sensor nodes and the queue size of each sensor, after which we developed the optimal parameters using Karush-Kuhn-Tucker conditions. Through extensive simulations, we show that the proposed scheme can significantly outperform the other existing techniques with respect to the throughput, channel utilization, delay, and transmission fairness.

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“…The third-year class also had two six months blocks, but at the end of the first of these, there was a state final examination on theory set by nurse educators that determined the student's progression into the next and final period of education. There was another final exam after this, that was set by nurses in practice because it was based on testing practical skills (Tapuvae, 2020).…”

Section: Hospital-based Training (Under New Zealand Administration)mentioning

confidence: 99%

Ethical Challenges Among Nurses in Samoa: Workplace, Practice and Profession

Sau¹

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This research explores and seeks to understand nursing perspectives/interpretations of ethical challenges within Samoan workplaces, and the impact on nurses’ ethical decision making and their nursing practices. It is well known that nurses often encounter ethical challenges in their everyday practice, and researchers from developed countries explore these challenges and generate models and theories about ways to address these issues within the nursing profession. However much less is known about such issues in developing countries, and there has been little, if any, research on the ethical practices of nurses in the Pacific region, such as in Samoa. To perform the research as both theoretically sound and culturally appropriate as it could be, the Ietoga research model (a developing methodology that recognises the nuances of the Samoan context) in association with “Teu o le Va” and “Samoan Philosophy of Nursing” was incorporated during data collection and analysis. The study is a mixed methods approach that employed a sequential exploratory design (SED). The two-phase design explores the topic by firstly using a qualitative method with twenty-one participant nurse experts, through interview techniques. Thematic analysis was used to extract themes that were later used to develop a survey questionnaire. The quantitative method phase used the purposively made survey questionnaire to collect 221 responses from nurses’ respondents that was analysed by using descriptive analysis. The findings from both analyses of the study were transformed into a conceptual model (called the Sulu Model) that is presented as a symbolic representation of Tuiga, a cultural headdress. The model presents the viewpoints of nurses’ concerning ethical knowledge, ethical challenges and ethical decision making in Samoa by means of five main key findings. First, fa’asamoa (culture) as a foundational and collective perspective of the meanings of ethics as perceived within Samoa, and by Samoan nurses in particular. Second, perspectives of socio-cultural knowledge relating to nursing ethics and education. Third, the attempted integration of western perspectives of nursing ethics in nursing education. Fourth, the experiences of ethical challenges in nursing practice, and lastly, decision making considerations and approaches to these ethical challenges. The study therefore contributes a particularly Samoan approach to the existing knowledge of nursing ethics and methodological approaches to research from socio-cultural, contextual and professional perspectives. The study concludes with implications and recommendations for nursing education and practice, for quality assurance, and also ideas for improvements to quality (ethical) patient care within the Samoan health care organisational culture.

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On the impact of LTE-U on Wi-Fi performance

Cited by 53 publications

References 4 publications

Coexistence Analysis of D2D‐Unlicensed and Wi‐Fi Communications

Coexistence Analysis of D2D‐Unlicensed and Wi‐Fi Communications

Coexistence scheme of licensed-assisted access using long-term evolution and wireless local area network for wireless sensor networks

Ethical Challenges Among Nurses in Samoa: Workplace, Practice and Profession

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