scholarly journals Location-Awareness for Failure Management in Cellular Networks: An Integrated Approach

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1501
Author(s):  
Sergio Fortes ◽  
Carlos Baena ◽  
Javier Villegas ◽  
Eduardo Baena ◽  
Muhammad Zeeshan Asghar ◽  
...  
Keyword(s):  
Cellular Networks ◽  
Computational Cost ◽  
Integrated Approach ◽  
Location Based Services ◽  
System Level ◽  
Location Information ◽  
Location Awareness ◽  
System Level Simulation ◽  
Location Aware ◽  
And Performance

Recent years have seen the proliferation of different techniques for outdoor and, especially, indoor positioning. Still being a field in development, localization is expected to be fully pervasive in the next few years. Although the development of such techniques is driven by the commercialization of location-based services (e.g., navigation), its application to support cellular management is considered to be a key approach for improving its resilience and performance. When different approaches have been defined for integrating location information into the failure management activities, they commonly ignore the increase in the dimensionality of the data as well as their integration into the complete flow of networks failure management. Taking this into account, the present work proposes a complete integrated approach for location-aware failure management, covering the gathering of network and positioning data, the generation of metrics, the reduction in the dimensionality of such data, and the application of inference mechanisms. The proposed scheme is then evaluated by system-level simulation in ultra-dense scenarios, showing the capabilities of the approach to increase the reliability of the supported diagnosis process as well as reducing its computational cost.

scholarly journals An Efficient and Privacy-Preserving Multiuser Cloud-Based LBS Query Scheme

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Lu Ou ◽  
Hui Yin ◽  
Zheng Qin ◽  
Sheng Xiao ◽  
Guangyi Yang ◽  
...  
Keyword(s):  
Location Privacy ◽  
Security Analysis ◽  
Privacy Preserving ◽  
Location Based Services ◽  
Third Party ◽  
Location Information ◽  
User Privacy ◽  
User Revocation ◽  
And Performance ◽  
Cloud Infrastructures

Location-based services (LBSs) are increasingly popular in today’s society. People reveal their location information to LBS providers to obtain personalized services such as map directions, restaurant recommendations, and taxi reservations. Usually, LBS providers offer user privacy protection statement to assure users that their private location information would not be given away. However, many LBSs run on third-party cloud infrastructures. It is challenging to guarantee user location privacy against curious cloud operators while still permitting users to query their own location information data. In this paper, we propose an efficient privacy-preserving cloud-based LBS query scheme for the multiuser setting. We encrypt LBS data and LBS queries with a hybrid encryption mechanism, which can efficiently implement privacy-preserving search over encrypted LBS data and is very suitable for the multiuser setting with secure and effective user enrollment and user revocation. This paper contains security analysis and performance experiments to demonstrate the privacy-preserving properties and efficiency of our proposed scheme.

Effects of Trace Layers and Joule Heating on the Temperature Distribution of Printed Circuit Boards: A Computational Study

2009 ◽  
Vol 1 (2) ◽  
Author(s):  
M. Baris Dogruoz ◽  
Manoj K. Nagulapally
Keyword(s):  
Joule Heating ◽  
Hot Spots ◽  
Printed Circuit Board ◽  
Computational Study ◽  
Computational Cost ◽  
Circuit Board ◽  
System Level ◽  
Printed Circuit ◽  
System Level Simulation ◽  
Background Mesh

A printed circuit board (PCB) is generally a multilayered board made of dielectric material and several layers of traces and vias. Performing detailed system-level computational fluid dynamics (CFD) simulations of PCBs including meshed trace and via geometries for each of the layers is impractical. In the present approach, the effects of the trace and via geometry are accurately modeled in the physical model by importing electronics computer aided-design data consisting of the trace and via layout of the board and computing locally varying orthotropic conductivity (kx, ky, and kz) on the printed circuit board using a background mesh. The spatially varying orthotropic conductivity is then mapped from the background mesh to the CFD mesh and used in a system-level simulation of the PCB with a minimal increase in the overall computational cost. On the other hand, as PCB component densities increase, the current densities increase thereby leading to regions of hot spots due to Joule heating. Hence, it is essential that the computational heat transfer simulations account for the heating due to the high current carrying traces. In order to accurately model the Joule heating of traces and vias, it is of essence to solve for the conservation of current in each of these traces. In this study, the effects of both trace layer nonhomogeneity and Joule heating are examined on a sample PCB with several components attached to it. The results are then compared with those from the conventional modeling techniques. It is demonstrated that there is considerable difference in the location of the hot spots and temperature values between two different methods.

scholarly journals Location-aware systems or location-based services: a survey with applications to CoViD-19 contact tracking

2020 ◽  
Vol 6 (4) ◽  
pp. 191-214
Author(s):  
H. R. Schmidtke
Keyword(s):  
Business Models ◽  
Privacy Preserving ◽  
Fundamental Rights ◽  
Location Based Services ◽  
Location Awareness ◽  
Web Based ◽  
Location Aware ◽  
Share Data ◽  
Contact Tracking ◽  
Key Steps

Abstract With the CoViD-19 pandemic, location awareness technologies have seen renewed interests due to the numerous contact tracking mobile application variants developed, deployed, and discussed. For some, location-aware applications are primarily a producer of geospatial Big Data required for vital geospatial analysis and visualization of the spread of the disease in a state of emergency. For others, comprehensive tracking of citizens constitutes a dangerous violation of fundamental rights. Commercial web-based location-aware applications both collect data and—through spatial analysis and connection to services—provide value to users. This value is what motivates users to share increasingly private and comprehensive data. The willingness of users to share data in return for services has been a key concern with web-based variants of the technology since the beginning. With a focus on two privacy preserving CoViD-19 contact tracking applications, this survey walks through the key steps of developing a privacy preserving context-aware application: from types of applications and business models, through architectures and privacy strategies, to representations.

Location-Aware Mobile Media and Advertising

2016 ◽  
pp. 201-218
Author(s):  
Mei Wu ◽  
Qi Yao
Keyword(s):  
Mobile Communication ◽  
Detailed Examination ◽  
Location Based Services ◽  
Mobile Technologies ◽  
Location Awareness ◽  
Information Propagation ◽  
Mobile Media ◽  
Location Aware ◽  
Modern Technologies

Location-Based Services (LBS) that are combined with ubiquitous smartphones usher in a new form of information propagation: Location-Based Advertising (LBA). Modern technologies enable mobile devices to generate and update location information automatically, which facilitates marketers to launch various types of location-aware advertising and promotional services to users who are in the vicinity. This chapter conceptualizes location-aware mobile communication as the locative and mobile media with a McLuhan's notion of retrieve of “locality” in the “networked” space of information flows, and examines the current dilemma faced by LBA in China through a case study. It first defines location-aware mobile technologies and influences such media afford for location-aware advertising and information propagation. It then provides an overview of the development of LBS and LBA in China. A case study of the LBA app “SBK” further offers a detailed examination how new models of advertising are developed with the technical affordances of location awareness, sociability, and spatiality. The chapter concludes with a discussion on the constraints and potential of LBA in China.

scholarly journals System Level Simulation for Two Tier Macro-Femto Cellular Networks

2014 ◽  
Vol 6 (6) ◽  
pp. 01-14 ◽  
Author(s):  
Shiqi Xing ◽  
Pantha Ghosal ◽  
Shouman Barua ◽  
Ramprasad Subramanian ◽  
Kumbesan Sandrasegaran
Keyword(s):  
Cellular Networks ◽  
System Level ◽  
System Level Simulation
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