scholarly journals Secondary users and the personal mhealth record: Designing tools to improve collaboration between patients and providers

2016 ◽  
Author(s):  
Harry D. Tunnell ◽  
Mark Pfaff ◽  
Anthony Faiola
Keyword(s):  
Secondary Users

scholarly journals An SETM Algorithm for Combating SSDF Attack in Cognitive Radio Networks

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
S. Tephillah ◽  
J. Martin Leo Manickam
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sensing ◽  
Trust Management ◽  
Cooperative Spectrum Sensing ◽  
Radio Networks ◽  
Second Phase ◽  
Common Channel ◽  
Secondary Users ◽  
Management Algorithm ◽  
Different Types

Security is a pending challenge in cooperative spectrum sensing (CSS) as it employs a common channel and a controller. Spectrum sensing data falsification (SSDF) attacks are challenging as different types of attackers use them. To address this issue, the sifting and evaluation trust management algorithm (SETM) is proposed. The necessity of computing the trust for all the secondary users (SUs) is eliminated based on the use of the first phase of the algorithm. The second phase is executed to differentiate the random attacker and the genuine SUs. This reduces the computation and overhead costs. Simulations and complexity analyses have been performed to prove the efficiency and appropriateness of the proposed algorithm for combating SSDF attacks.

Defending Against Massive SSDF Attacks From a Novel Perspective of Honest Secondary Users

2019 ◽  
Vol 23 (10) ◽  
pp. 1696-1699 ◽  
Author(s):  
Zhiguo Sun ◽  
Zhenyu Xu ◽  
Muhammad Zahid Hammad ◽  
Xiaoyan Ning ◽  
Qiuying Wang ◽  
...  
Keyword(s):  
Secondary Users

scholarly journals The Interactive Urban Robot: User-centered development and final field trial of a direction requesting robot

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Astrid Weiss ◽  
Nicole Mirnig ◽  
Ulrike Bruckenberger ◽  
Ewald Strasser ◽  
Manfred Tscheligi ◽  
...  
Keyword(s):  
Development Process ◽  
Service Robot ◽  
Communication Model ◽  
City Center ◽  
Secondary Users ◽  
Feedback Modalities ◽  
Socially Interactive Robots ◽  
The City ◽  
User Centered Development ◽  
User Centered

AbstractIn this article, we present the user-centered development of the service robot IURO. IURO’s goal is to find the way to a designated place in town without any previous map knowledge, just by retrieving information from asking pedestrians for directions. We present the 3-years development process,which involved a series of studies on its appearance, communication model, feedback modalities, and social navigation mechanisms. Our main contribution lies within the final field trial.With the autonomous IURO platform, we performed a series of six way-finding runs (over 24 hours of run-time in total) in the city center of Munich, Germany. The robot interacted with approximately 100 pedestrians of which 36 interactions included a full route dialogue. A variety of empirical methods was used to explore reactions of primary users (pedestrians who actually interacted with the robot) and secondary users (bystanders who observed others interacting). The gathered data provides insights into usability, user experience, and acceptance of IURO and allowed us deriving recommendations for the development of other socially interactive robots.

Operating point selection for primary and secondary users in cognitive radio networks

2009 ◽  
Vol 53 (8) ◽  
pp. 1158-1170 ◽  
Author(s):  
Xavier Gelabert ◽  
Ian F. Akyildiz ◽  
Oriol Sallent ◽  
Ramon Agustí
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Networks ◽  
Radio Networks ◽  
Operating Point ◽  
Point Selection ◽  
Secondary Users ◽  
Selection For ◽  
Primary And Secondary Users

Queueing models for cognitive wireless networks with sensing time of secondary users

2021 ◽  
Author(s):  
Tuan Phung-Duc ◽  
Kohei Akutsu ◽  
Ken’ichi Kawanishi ◽  
Osama Salameh ◽  
Sabine Wittevrongel
Keyword(s):  
Wireless Networks ◽  
Queueing Models ◽  
Secondary Users ◽  
Cognitive Wireless Networks ◽  
Sensing Time

scholarly journals Performance Analysis of Hybrid Radio Frequency and Free Space Optical Communication Networks with Cooperative Spectrum Sharing

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 108
Author(s):  
Dong Qin ◽  
Yuhao Wang ◽  
Tianqing Zhou
Keyword(s):  
Radio Frequency ◽  
Communication Networks ◽  
Free Space ◽  
Spectrum Sharing ◽  
Cumulative Distribution ◽  
Free Space Optical ◽  
Secondary Users ◽  
Primary Users ◽  
Cooperative Spectrum Sharing ◽  
The Impact

This paper investigates the impact of cooperative spectrum sharing policy on the performance of hybrid radio frequency and free space optical wireless communication networks, where primary users and secondary users develop a band of the same spectrum resource. The radio frequency links obey Nakagami-m distribution with arbitrary fading parameter m, while the free space optical link follows gamma-gamma distributed atmospheric turbulence with nonzero pointing error. Because the secondary users access the spectrum band without payment, their behavior needs to be restricted. Specifically, the power of the secondary users is dominated by the tolerable threshold of the primary users. Considering both heterodyne and intensity modulation/direct detection strategies in optical receiver, the performance of optical relaying networks is completely different from that of traditional networks. With the help of bivariable Fox’s H function, new expressions for cumulative distribution function of equivalent signal to noise ratio at destination, probability density function, outage probability, ergodic capacity and symbol error probability are built in closed forms.

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