Mobile Personal Communication Research Articles

Background levels and brain organoid impact of RF field exposure in a healthcare environment

Introduction: This study is an introduction to the empirical and impact evaluation of radiofrequency electromagnetic field (RF-EMF) radiation exposure in a healthcare environment, focusing on an indoor microenvironment. It explores the expression of various genes associated with cellular responses, cell proliferation, senescence, and apoptotic cell death. The assessment analyzes current personal mobile communications (2G-5G FR1), providing a clear understanding of RF-EMF exposure and compliance with regulatory limits.Methods: The signals from different wireless communication systems at Hospital Universitario de Canarias (HUC) in Tenerife, Canary Islands, Spain, were examined in 11 locations. Four measurement campaigns were performed with frequency-selective exposimeters (PEMs) and an EME Spy 200 MVG, and experimental electric field values were compared as a long-term exposition. The frequency with the highest contribution (2.174 V/m) observed (1840 MHz) in UMTS was selected for biological effects evaluation.Results: The study focuses on four locations with the highest exposure to communication systems (downlinks), analyzing the results to verify compliance with regulations that ensure the safety of patients, the general public, and healthcare workers. LTE B20 (DL), GSM+UMTS 900 (DL), GSM 1800 (DL), UMTS 2100 (DL), and LTE B7 (DL) exhibited relatively higher E/m values throughout the campaigns, and these values consistently remained below the ICNIRP reference levels, signifying a consistently low level of exposure. In addition, this work presents the biological effects on neural stem cells (NSCs) using 3D brain organoids (BOs) exposed to RF signals in a validated and commercial experimental setting: the Gigahertz Transverse Electromagnetic cell (GTEM). The GTEM allows for the creation of homogeneous field electromagnetic fields in a small, enclosed setting and guarantees exposure conditions in a wide range of frequencies. BOs are an in vitro 3D cell-culture technology that reproduces the cellular composition and structure of the developing brain. Analyzing the expression of several genes associated with cellular responses, cell proliferation, senescence, and apoptotic cell death, we found that exposure of BOs at 1840 MHz did not affect mRNA expression in brain genes related to apoptosis or senescence. However, a decrease in gene expression for cell proliferation and cell activity markers was observed during the differentiation stage of BOs.Discussion: The discussion emphasizes the coexistence and evolution of various heterogeneous networks and services throughout the four measurement campaigns. Across all measured results, the levels of the obtained E-field were consistently well below the exposure limits set by internationally accepted standards and guidelines. These obtained values have been established in order to consider their potential effects on cell proliferation and cell activity, especially in differentiating biological organisms. Consequently, the results obtained and the methodology presented could serve as a foundational framework for establishing the basis of RF-EMF assessment in future heterogeneous 5G developments, particularly in the millimeter wave (mmWave) frequency range, where the forecast is for massive high-node density networks.

Towards Environmental RF-EMF Assessment of mmWave High-Node Density Complex Heterogeneous Environments.

The densification of multiple wireless communication systems that coexist nowadays, as well as the 5G new generation cellular systems advent towards the millimeter wave (mmWave) frequency range, give rise to complex context-aware scenarios with high-node density heterogeneous networks. In this work, a radiofrequency electromagnetic field (RF-EMF) exposure assessment from an empirical and modeling approach for a large, complex indoor setting with high node density and traffic is presented. For that purpose, an intensive and comprehensive in-depth RF-EMF E-field characterization study is provided in a public library study case, considering dense personal mobile communications (5G FR2 @28 GHz) and wireless 802.11ay (@60 GHz) data access services on the mmWave frequency range. By means of an enhanced in-house deterministic 3D ray launching (3D-RL) simulation tool for RF-EMF exposure assessment, different complex heterogenous scenarios of high complexity are assessed in realistic operation conditions, considering different user distributions and densities. The use of directive antennas and MIMO beamforming techniques, as well as all the corresponding features in terms of radio wave propagation, such as the body shielding effect, dispersive material properties of obstacles, the impact of the distribution of scatterers and the associated electromagnetic propagation phenomena, are considered for simulation. Discussion regarding the contribution and impact of the coexistence of multiple heterogeneous networks and services is presented, verifying compliance with the current established international regulation limits with exposure levels far below the aforementioned limits. Finally, the proposed simulation technique is validated with a complete empirical campaign of measurements, showing good agreement. In consequence, the obtained datasets and simulation estimations, along with the proposed RF-EMF simulation tool, could be a reference approach for the design, deployment and exposure assessment of the current and future wireless communication technologies on the mmWave spectrum, where massive high-node density heterogeneous networks are expected.

Empirical and Modeling Approach for Environmental Indoor RF-EMF Assessment in Complex High-Node Density Scenarios: Public Shopping Malls Case Study

This work provides an intensive and comprehensive in-depth study from an empirical and modeling approach of the environmental radiofrequency electromagnetic fields (RF-EMF) radiation exposure in public shopping malls, as an example of an indoor high-node user density context aware environment, where multiple wireless communication systems coexist. For that purpose, current personal mobile communications (2G-5G FR 1) as well as Wi-Fi services (IEEE 802.11n/ac) have been precisely analyzed in order to provide clear RF-EMF assessment insight and to verify compliance with established regulation limits. In this sense, a complete measurements campaign has been performed in different countries, with frequency-selective exposimeters (PEMs), providing real empirical datasets for statistical analysis and allowing discussion and comparison regarding current health effects and safety issues between some of the most common RF-EMF exposure safety standards: ICNIRP 2020 (Spain), IEEE 2019 (Mexico) and a more restrictive regulation (Poland). In addition, environmental RF-EMF exposure assessment simulation results, in terms of spatial E-field characterization and Cumulative Distribution Function (CDF) probabilities, have been provided for challenging incremental high-node user dense scenarios in worst case conditions, by means of a deterministic in-house 3D Ray-Launching (3D-RL) RF-EMF safety simulation technique, showing good agreement with the experimental measurements. Finally, discussion highlighting the contribution and effects of the coexistence of multiple heterogenous networks and services for the environmental RF-EMF radiation exposure assessment has been included, showing that for all measured results and simulated cases, the obtained E-Field levels are well below the exposure limits established in the internationally accepted standards and guidelines. In consequence, the obtained results and the presented methodology could become a starting point to stablish the RF-EMF assessment basis of future complex heterogeneous 5G FR 2 developments on the millimeter wave (mmWave) frequency range, where massive high-node user density networks are expected.

Functional state of schoolchildren’s adaptation system in conditions of separation from mobile communication devices

Introduction. The article examines the problem of creating healthy learning environments for children and adolescents. The purpose of this research is to identify the characteristics of functional state of schoolchildren’s adaptation system in conditions of limited use of mobile communication devices. Materials and Methods. Data for this study were collected using a hygiene experiment. The sample consisted of 355 schoolchildren. The observation group (n=155) included students separated from their mobile communication devices. The control group consisted of 180 students. The study involved evaluating the functional state of the adaptive capacity of compensatory adaptive mechanisms using generally accepted R. M. Baevsky’s method, modified for the purposes of the research. The identified indicators were subjected to statistical processing. The authors employed the following methods of theoretical research: comparison, formalization, generalization and system analysis. Results. The authors provide an international overview of interventions aimed at reducing mobile phone use in educational settings. The relationship between the state of schoolchildren’s adaptation mechanisms within all age groups and indicators of the cardiovascular system in conditions of separation from mobile communication devices was studied. The authors focus on the values of schoolchildren’s adaptive capacity in conditions of free use of mobile phones during the school day compared to the values obtained in conditions of smartphone separation. The study reveals the correlation between the activity and sensitivity of vegetative regulation of heart rate and gender and age characteristics. Conclusions. The research findings confirm the effectiveness of the restrictions imposed on the use of personal mobile communication devices at comprehensive schools. The authors conclude that limited use of mobile communication devices prevents reducing adaptive capacity of the child's body, therefore it reduces the risk of fatigue and pathological changes.

Transforming Health Care through Digital Revolutions.

The Internet, which has spanned several networks in a broad range of domains, is having a significant impact on every aspect of our lives. The next generation of networks will utilize a wide variety of resources with significant sensing capabilities. Such networks will extend beyond physically linked computers to include multimodal-information from biological, cognitive, semantic, and social networks. This paradigm shift will involve symbiotic networks of smart medical devices, and smart phones or mobile personal computing and communication devices. These devices—and the network—will be constantly sensing, monitoring, and interpreting the environment; this is sometimes referred to as the Internet of Things (IoT). We are also witnessing considerable interest in the “Omics” paradigm, which can be viewed as the study of a domain in a massive scale, at different levels of abstraction, in an integrative manner. The IoT revolution, combined with the Omics revolution (genomics and socio-omics or social networks) and artificial intelligence resurgence, will have significant implications for the way health care is delivered in the United States. After discussing a vision for health care in the future, we introduce the P9 health care concept, followed by a discussion of a framework for smart health care. Then, we present a case study and research directions, followed by examples of ongoing work at the National Institute of Standards and Technology (NIST).

Customers perference and satisfaction towards reliance- 4 g jio services in Tiruchirappalli district

A computer network or a data network is a digital telecommunication network. Reliance Jio limited a subsidiary of Reliance industry limited is India’s largest private sector company, which is the most first telecom operator to hold pan India unified license. The company provides all communication services except global mobile personal communication by satellite services. The objective is to identify the customer preference and satisfaction on Reliance Jio sim services in Tiruchirappalli district. Data were collected with the help of survey method through structured questionnaire. After collecting the data from the customers, it was verified and analyzed using percentage, chi-square tests method for the identifying the customer response over reliance jio services. The present study carried out with 250 users of Reliance 4G services.

From 2G to 5G Spatial Modeling of Personal RF-EMF Exposure Within Urban Public Trams

The upcoming design and implementation of the new generation of 5G cellular systems, jointly with the multiple wireless communication systems that nowadays coexist within vehicular environments, leads to Heterogeneous Network challenging urban scenarios. In this framework, user's Radiofrequency Electromagnetic Fields (RF-EMF) radiation exposure assessment is pivotal, to verify compliance with current legislation thresholds. In this work, an in-depth study of the E-field characterization of the personal mobile communications within urban public trams is presented, considering different cellular technologies (from 2G to 5G). Specifically, frequency bands in the range of 5G NR frequency range 1 (FR1) and millimeter wave (mm-wave) bands within frequency range 2 (FR2) have been analyzed for 5G scenarios, considering their dispersive material properties. A simulation approach is presented to assess user mobile phone base station up-link radiation exposure, considering all the significant features of urban transportation trams in terms of structure morphology and topology or the materials employed. In addition, different user densities have been considered at different frequency bands, from 2G to 5G (FR1 and FR2), by means of an in-house developed deterministic 3D Ray-Launching (3D-RL) technique in order to provide clear insight spatial E-field distribution, including the impact in the use of directive antennas and beamforming techniques, within realistic operation conditions. Discussion in relation with current exposure limits have been presented, showing that for all cases, E-Field results are far below the maximum reference levels established by the ICNIRP guidelines. By means of a complete E-field campaign of measurements, performed with both, a personal exposimeter (PEM) and a spectrum analyzer within a real tram wagon car, the proposed methodology has been validated showing good agreement with the experimental measurements. In consequence, a simulation-based analysis methodology for dosimetry estimation is provided, aiding in the assessment of current and future cellular deployments in complex heterogeneous vehicular environments.

Identification of critical quality dimensions for continuance intention in mHealth services: Case study of onecare service

Mobile health (mHealth) services support the continuous health-related monitoring, feedback, and behavior modification of individuals and populations through the use of personal mobile communication devices. Poor service quality is a major reason why many users have discontinued using mHealth services. However, only a few studies have identified the critical quality components for continuance intention. The current study aims to identify the crucial quality dimensions for users’ continuance intention in an mHealth service called Onecare. This service provides various forms of support for the day-to-day health behavior monitoring of college students by utilizing daily behavior data. In this research, five major quality dimensions of mHealth services, namely, content quality, engagement, reliability, usability, and privacy, were derived from existing studies. The effect of each quality dimension on continuance intention was estimated by analyzing the survey responses of 191 Onecare service users. The quality dimension with the most considerable effect on continuance intention was determined to be engagement followed by content quality and reliability. By contrast, the effects of usability and privacy on continuance intention were insignificant. Furthermore, this study found that the optimal quality management strategy can change depending on the objective, i.e., to increase continuance intention or satisfaction. These results will help mHealth service managers allocate their limited resources to effectively and efficiently improve continuance intention. Future research is required to verify if the findings of this study are generalizable to any population because the sample used in this work was specific to Korean college students.

WiFi-based PCL for monitoring private airfields

In recent years, a number of studies have looked at the use of passive coherent location (PCL) radar systems for short-range surveillance applications [1]–[8]. In such applications, the transmitters for mobile personal communication and network connection have been successfully exploited as illuminators of opportunity; these include the base stations of the global system for mobile communications, universal mobile telecommunications system, worldwide interoperability for microwave access (WiMAX), and long-term evolution (LTE).

Adaptive Cross Layer Design for Mobility Using Media Independent Handover

The fading boundaries between wireless computer networks and mobile personal communication have lead to rapid growth in all fields of mobile communication which include deployment of communication system, advances in mobile techniques and services in heterogeneous network environment. Various layers of the protocol stack contribute in decision-making during network switching in such an environment. Various network and quality of service metric considered in proposed framework include flow rate (congestion measure), throughput, delay, jitter and packet loss. Thus, the proposed framework is a unified and global cross layer framework to overcome challenging problem of seamless access of wireless networks and services. Inter-layer and inter-network communication is implemented through IEEE 802.21 Media Independent Handover standard.

Plasmonic Sensor Monolithically Integrated with a CMOS Photodiode

Complementary metal oxide semiconductor (CMOS) technology has made personal mobile computing and communications an everyday part of life. In this paper we present a nanophotonic integrated CMOS-based biosensor that will pave the way for future personalized medical diagnostics. To achieve our aim, we have monolithically integrated plasmonic nanostructures with a CMOS photodiode. Following this approach of monolithic nanophotonics–microelectronics integration, we have successfully developed a miniaturized nanophotonic sensor system with direct electrical readout, which eliminates the need of bulky and costly equipment that is presently used for interrogation of nanophotonic sensors. The optical sensitivity of the plasmonic nanostructures is measured to be 275 nm/refractive index unit (RIU), which translates to an electrical sensitivity of 5.8 V/RIU in our integrated sensor system. This advance is the first demonstration of monolithic integration of nanophotonic structures with CMOS detectors and is a crucia...

A Review of the Evolution of Auctions As a Method for Radio Spectrum Assignment

Radio spectrum is the means by which modern wireless communications are possible. It basically refers to the use of electromagnetic waves to code and transmit information. In recent years there has been an explosion in demand for spectrum, particularly because of impressive progress in digital wireless communications, including personal mobile communications. Spectrum can be regarded as a public good which can be divided in portions or bands and used on the basis of time and geography. The goals of this paper are to establish the economic principles motivating the use of auctions, to introduce main auction formats used worldwide and the deficiencies detected throughout its application in the last fifteen years. The review discusses the early days in the need for spectrum allocation and assignment; it is mainly a recount of the way spectrum organisation and administration came under regulatory control in the United States. Then it briefly mentions the methods used before the 1990s for spectrum allocation of cellular telephony bands and does a detailed description of the use of auctions as the predominant method, nowadays, for spectrum assignment, and presents a description of the currently most widely used spectrum format.

Towards connecting people, locations and real-world events in a cellular network

The success of personal mobile communication technologies has led an emerging expansion of the telecommunication infrastructure but also to an explosion to mobile broadband data traffic as more and more people completely rely on their mobile devices, either for work or entertainment. The continuously interaction of their mobile devices with the mobile network infrastructure creates digital traces that can be easily logged by the network operators. These digital traces can be further used, apart from billing and resource management, for large-scale population monitoring using mobile traffic analysis. They could be integrated into intelligent systems that could help at detecting exceptional events such as riots, protests or even at disaster preventions with minimal costs and improve people safety and security, or even save lives. In this paper we study the use of fully anonymized and highly aggregate cellular network data, like Call Detail Records (CDRs) to analyze the telecommunication traffic and connect people, locations and events. The results show that by analyzing the CDR data exceptional spatio-temporal patterns of mobile data can be correlated to real-world events. For example, high user network activity was mapped to religious festivals, such as Ramadan, Le Grand Magal de Touba and the Tivaouane Maouloud festival. During the Ramadan period it was noticed that the communication pattern doubled during the night with a slow start during the morning and along the day. Furthermore, a peak increase in the number of voice calls and voice calls duration in the area of Kafoutine was mapped to the Casamance Conflict in the area which resulted in four deaths. Thus, these observations could be further used to develop an intelligent system that detects exceptional events in real-time from CDRs data monitoring. Such system could be used in intelligent transportation management, urban planning, emergency situations, network resource allocation and performance optimization, etc.

Game-based data offloading scheme for IoT system traffic congestion problems

Internet of things (IoT) is seen as another information and industrial wave after the invention of personal computers, the Internet, and mobile communication networks. Especially, IoT/cellular network integration becomes a new service platform for the different kinds of traffic manipulation. However, due to the excessive traffic demands, it is currently facing a severe traffic overload problem. In this paper, we propose a new traffic control scheme based on the data offloading technique. By using the Vickrey-Clarke-Groves (VCG) mechanism and Rubinstein bargaining game model, our data offloading approach can effectively alleviate the IoT traffic congestion while enhancing the quality-of-service (QoS) in cellular network systems. Finally, we show the effectiveness of our proposed scheme through extensive simulations.

DESIGN AND SIMULATION OF A SINGLE FED MULTI-BAND CIRCULARLY POLARIZED MICROSTRIP ANTENNA WITH SLOTS

Nowadays the mobile personal communication systems and wireless networks are commonly used. Experience has revealed that the antennas suitable for these applications should have small size and operate in assigned different frequency bands. For this purpose, circularly polarized (CP) multi- band square microstrip antenna with three N-slots and a pair of truncated corners is proposed, designed and simulated. To reduce the losses and improve the antenna efficiency in addition to the bandwidth, an efficient electromagnetic band gap (EBG) structure is introduced. The proposed antenna has produced a higher efficiency, an improved operational bandwidth, and a higher gain relative to the conventional microstrip antenna.

Lighting Control System Based on Smart Phone and Bluetooth

With the rapid development of the Smartphone in recent years, it has been a popular personal mobile communication device. How to make the Smartphone be a better service for our lives is an important direction of research in our smart home. This article describes how to integrate the Android, Bluetooth technology into the control of lighting equipment to realize the lighting equipment’s power automatic switching.

Study the effect of Mobile (Cell Phone) on the Heart Electricity

Electrical and electronic devices, wireless cellular telephones and other mobile personal communication services are the fastest growing field in the world. However, there is uncertainty about the health effects of Radio Frequency (RF). The main aim of the present work is to study the effect of cell phone on human health and especially on a heart rate by exposing a human to the radiation emitted from cell phone (EMF) and registering an ECG to the heart at different exposure times.

SATMED: Legal Aspects of the Physical Layer of Satellite-Telemedicine

Significant disparities exist between the availability of physicians and health care specialists in urban and rural areas, particularly in developing countries. Emerging telemedicine technologies would enable doctors located in urban areas and elsewhere around the globe to serve rural patients. However, the limited availability of telecommunications infrastructure and technology necessary for telemedicine in rural areas inhibits the deployment of such health care applications. Satellites' ability to bridge gaps in telecommunications infrastructure gives them a unique capacity to also bridge the urban-rural health care divide by making telemedicine applications available to rural patients and medical professionals worldwide. However, international law provides an expansive grant of national sovereignty over electromagnetic spectrum that supersedes state obligations to provide access to health care. As a result, the physical equipment necessary to provide telemedicine services to rural patients is subject to national regulatory regimes that prevent the widespread and cost-effective availability of life-saving technology.This paper identifies the body of international law governing satellite telemedicine including conventions governing economic, social and cultural rights and the right to health care; and international telecommunications law including the ITU Constitution, Tampere Convention, and the Global Mobile Personal Communication by Satellite Memorandum of Understanding. It then concludes that an additional international undertaking to eliminate national barriers to entry for satellite telemedicine technology is necessary.

Radiation Pattern of Patch Antenna with Slits

The Microstrip antenna has been commercially used in many applications, such as direct broadcast satellite service, mobile satellite communications, global positioning system, medical hyperthermia usage, etc. The patch antenna of the size reduction at a given operating frequency is obtained. Mobile personal communication systems and wireless computer networks are most commonly used nowadays and they are in need of antennas in different frequency bands. In regulate to without difficulty incorporate these antennas into individual systems, a micro strip scrap transmitter have been preferred and intended for a convinced divergence. There is also an analysis of radiation pattern, Gain of the antenna, Directivity of the antenna, Electric Far Field. The simulations results are obtained by using electromagnetic simulation software called feko software are presented and discussed

Assessing the quality of forest fuel loading data collected using public participation methods and smartphones

Effective wildfire management in the wildland–urban interface (WUI) depends on timely data on forest fuel loading to inform management decisions. Mobile personal communication devices, such as smartphones, present new opportunities to collect data in the WUI, using sensors within the device – such as the camera, global positioning system (GPS), accelerometer, compass, data storage and networked data transfer. In addition to providing a tool for forest professionals, smartphones can also facilitate engaging other members of the community in forest management as they are now available to a growing proportion of the general population. Approaches where the public participates in the data-collection process (inspired by citizen science) may be beneficial for fire hazard issues. This research note demonstrates a smartphone application for measuring forest fuel loading in the WUI by forestry professionals and non-professionals, and evaluates the quality of the collected data. Smartphones and their associated applications may provide new tools for collecting forest structural data in the WUI, but forest managers need to ensure that measurement protocols provide the required precision for analysis and enforce the logical consistency of observations made by a diverse set of data collectors, and that sufficient training is provided. If these recommendations are followed, we conclude that data acquired by volunteers in collaborative projects through smartphone applications can be of acceptable quality to help inform forest management decisions.