As Industry 4.0 keeps approaching, the quality of data communication in industrial scenarios is increasingly important to support a high degree of automation and intelligence in factories. Wi-Fi 6E, the latest advanced wireless local-area network standard, comes with new 6 GHz unlicensed spectrum, a new access method named Orthogonal Frequency Division Multiple Access, and even more features. Accordingly, Wi-Fi 6E can be a promising candidate technology for an industrial wireless network. To fulfill industrial applications, Wi-Fi 6E is challenged with high communication requirements and a massive number of devices to support. Since the cutting-edge Wi- Fi 6E systems have not been widely deployed practically, simulations are required to evaluate the performance of Wi-Fi 6E in industrial scenarios. Based on an event-based simulator from Ericsson, we performed simulations covering not only single access point scenarios with periodic traffic, but also scenarios where multiple applications and generations of Wi-Fi systems coexist. Finally, a large-area industry scenario with frequency planning applied was evaluated. Through simulation results and analysis, we conclude that Wi-Fi 6E performs well in most of our tested scenarios. Compared to legacy Wi-Fi 5,Wi-Fi 6E performs better when subject to uplink traffic, and is more suitable for handling a massive number of devices or high packet rate traffic due to its unique multi-user accessing. However, Wi-Fi 6E can have poor performance when performing multi-user transmission with applications that have complex traffic and millisecond-level latency requirement. In some cases, Wi-Fi 6E performs worse than Wi-Fi 5 while handling multiple applications whose packet sizes vary a lot. Moreover, with the increase in factory scales, Wi-Fi 6E can have a magnificent performance drop, almost 100%, through the regulatory requirements in the new 6 GHz unlicensed band. / När Industri 4.0 fortsätter att närma sig blir datakommunikationens kvalitet i industriella scenarier allt viktigare för att stödja en hög grad av automatisering och intelligens i fabriker. Wi-Fi 6E, den senaste avancerade standarden för trådlöst lokalt nätverk, kommer med ett nytt 6 GHz olicensierat spektrum, en ny åtkomstmetod som heter Orthogonal Frequency Division Multiple Access och ännu fler funktioner. Följaktligen kan Wi-Fi 6E vara en lovande kandidatteknik för ett industriellt trådlöst nätverk. För att uppfylla industriella applikationer utmanas Wi-Fi 6E med höga kommunikationskrav och ett stort antal enheter att stödja. Eftersom de banbrytande Wi-Fi 6E systemen inte har använts i stor utsträckning praktiskt taget, krävs simuleringar för att utvärdera prestandan för Wi-Fi 6E i industriella scenarier. Baserat på en händelsebaserad simulator från Ericsson utförde vi simuleringar som inte bara omfattar enstaka åtkomstpunktsscenarier med periodisk trafik, utan också scenarier där flera applikationer och generationer av Wi-Fi-system samexisterar. Slutligen utvärderades ett storindustriscenario med tillämpad frekvensplanering. Genom simuleringsresultat och analys drar vi slutsatsen att Wi-Fi 6E fungerar bra i de flesta av våra testade scenarier. Jämfört med äldre Wi-Fi 5, fungerar Wi-Fi 6E bättre när den utsätts för upplänkstrafik och är mer lämpad för att hantera ett stort antal enheter eller hög pakettrafik på grund av dess unika åtkomst för flera användare. Wi-Fi 6E kan dock ha dålig prestanda vid överföring av fleranvändare med applikationer som har komplex trafik och krav på latens på millisekundnivå. I vissa fall fungerar Wi-Fi 6E sämre än Wi-Fi 5 när hanterar flera applikationer vars paketstorlekar varierar mycket. Med ökningen av fabriksskalor kan Wi-Fi 6E dessutom ha en fantastisk prestandaförlust, nästan 100%, genom lagkraven för det nya 6 GHz-bandet utan licens.

När jag började skriva de här texterna hade jag endast en premiss och en något diffus bild av hur storyn skulle vara. Det skulle handla om åtta personer och en hund som blev instängda i ett skyddsrum långt ner under marken och de skulle bli kvar där. Länge. Skyddsrummet skulle vara konstruerat så att människor kan leva där under lång tid, ett sorts experiment för att se om människan kan leva under jord om ytan skulle bli obeboelig på grund av klimatförändringar. Jag ville att texten skulle växa fram medan jag skrev. Jag ville inte tänka ut för mycket på förhand med min logiska hjärna, tvärtom ville jag att det som fanns i mitt hjärta och i magen skulle tillåtas komma fram medan jag skrev. Jag ville att texten skulle växa fram intuitivt, inom en ram som var satt. Jag har skrivit och testat och misslyckats, skrivit och testat och inte riktigt kommit hela vägen. Resultatet är en lång text, men den är långt ifrån färdig. Vissa små delar är mer bearbetade, annat kommer med största säkerhet att strykas. Jag har många omskrivningar kvar att göra och jag har ändrat uppfattning om att slutresultatet nödvändigtvis måste bli en lång roman.  Min berättelse har två berättare. För tillfället berättar de både i första person, men jag har haft funderingar på om jag ska låta en eller båda istället få framträda i tredje person. Hade jag haft en mindre omständlig skapandeprocess, kanske jag redan hade kommit fram till hur det ska vara, men nu är det en gång så att jag måste pröva för att se hur det blir, innan jag kan bestämma mig. Jag tror dock att det kan bli bra att Almas och Olivias berättelser berättas växelvis och att de delvis överlappar varandra. Den sista delen av texten beskriver världen utanför skyddsrummet och hör alltså inte direkt till mitt projekt. Den har ändå kommit till under det här året och därför har den fått komma med här.

Indiana University-Purdue University Indianapolis (IUPUI) / The Internet of Things (IoT) is a natural evolution of the Internet and is becoming more and more ubiquitous in our everyday home, enterprise, healthcare, education, and many other aspects. The data gathered and processed by IoT networks might be sensitive and that calls for feasible and adequate security measures. The work in this thesis describes the use of the Wi-Fi technology in the IoT connectivity, then proposes a new approach, the Proactive Wireless Protected Access (PWPA), to protect the access networks. Then a new end to end (e2e) IoT security model is suggested to include the PWPA scheme. To evaluate the solutions security and performance, rstly, the cybersecurity triad: con dentiality, integrity, and availability aspects were discussed, secondly, the solutions performance was compared to a counterpart e2e security solution, the Secure Socket Layer security. A small e2e IoT network was set up to simulate a real environment that uses HTTP protocol. Packets were then collected and analyzed. Data analysis showed a bandwidth e ciency increase by 2% (Internet links) and 12% (access network), and by 344% (Internet links) and 373% (access network) when using persistent and non-persistent HTTP respectively. On the other hand, the analysis showed a reduction in the average request-response delay of 25% and 53% when using persistent and non-persistent HTTP respectively. This scheme is possibly a simple and feasible solution that improves the IoT network security performance by reducing the redundancy in the TCP/IP layers security implementation.

No description available.

This study investigates how Swedish internet service providers (ISP) choose a Wi-Fi-Router for use by private customers. The study investigates the process of choosing a Wi-Fi-Router and what features the companies prioritize during the process. These features can be aspects such as security, speed, capacity, Wi-Fi standard and price. The study seeks to answer how the decision-making process is carried out in the companies, but also how the Wi-Fi-Routers features are prioritized during the decision-making process.  This was investigated using qualitative methods in the form of semi-structured interviews. The interviews were held remotely, which allowed for a larger spread of respondents. After the interviews, the data was coded using thematic analysis to arrive at the results of the study.  The study identified several different phases during the decision-making process that ISP’s go through. After identifying the phases, they were placed in a model which seeks to describe the decision-making process for all ISPs.  The most important aspect during the decision-making process was the price. The remaining aspects were decided by the Wi-Fi-Router's price and compromises had to be made to lower the price to a reasonable level for both the company and the customer. In addition to the price, the companies aimed to find a balance between the other features, where compromises can be made for features they consider to be less important.

<p>The growing demand for faster, more reliable wireless connectivity has brought about the development of the 802.11ax (Wi-Fi 6/6E) amendment, which aims to satisfy the increasing need for seamless wireless connectivity and improved traffic handling. The 802.11ax amendment introduces noteworthy improvements to the 802.11 wireless standard that should greatly improve the efficiency of wireless networks. The body of existing research has seen several simulated 802.11ax environments and found great success, however, these additions remain largely untested in physical environments. This thesis undertakes the testing for 802.11ax MU-MIMO to determine if these simulated successes translate into real-world improvements. By using a classroom scenario, the study investigates the performance improvements purported by 802.11ax, specifically the updated and expanded DL and UL MU-MIMO in an environment with high client numbers and density. </p>

Wi-Fi Sensing is becoming a prominent field with a wide range of potential applications. Using existing hardware on a wireless network such as access points, cell phones, and smart home devices, important information can be inferred about the current physical environment. Through the analysis of Channel State Information collected in the Neighborhood Discovery Protocol process, the wireless network can detect disturbances in Wi-Fi signals when the physical environment changes. This results in a system that can sense motion within the Wi-Fi network, allowing for movement detection without any wearable devices. The goal of this thesis is to answer whether Wi-Fi Sensing can enable useful applications at the enterprise level. The main applications we will focus on are presence detection and in-zone movement detection. Our contributions include: 1. A scalable, statistical analysis system that generates a heatmap and detects movement in a 12 x 9 meter zone with 98 percent accuracy, as well as a 6 x 9 meter zone with 88 percent accuracy. 2. A broad dataset collected for evaluation in an enterprise setting. 3. An end-to-end CSI data visualization and analysis application.

No description available.

Yes / This study presents a wideband multiple-input-multiple-output (MIMO) antenna for Wifi/WLAN/LTE applications. The antenna consists of two triangular patches as the radiating elements placed orthogonally to each other. Two T-slots and a rectangular slot were etched on the ground plane to improve return loss and isolation. The total dimension of the proposed antenna is 30 x 30 mm2. The antenna yields impedance bandwidth of 101.7% between 2.28 GHz up to 7 GHz with a reflection coefficient of < -10 dB, and mutual coupling of < -14 dB. The results including S-Parameters, MIMO characteristics with analysis of envelope correlation coefficient (ECC), total active reflection coefficient (TARC), capacity loss, channel capacity, VSWR, antenna gain and radiation patterns are evaluated. These characteristics indicate that the proposed antenna is suitable for MIMO wireless applications.

My novel takes place after a climate change apocalypse, when the wealthy have built luxury resorts on far-off planets. The have-nots of earth travel to these resorts as workers in hopes of earning a spot as a Guest. The book is centered around a Chicano couple who travels to the Pluto location, and gets caught up in a heated strike, bringing their own relationship's issues to the fore.