The rapid development of personal health records(PHR)systems enables an individual to collect,create,store and share his PHR to authorized entities.Health care systems within the smart city environment require a patie...The rapid development of personal health records(PHR)systems enables an individual to collect,create,store and share his PHR to authorized entities.Health care systems within the smart city environment require a patient to share his PRH data with a multitude of institutions’repositories located in the cloud.The cloud computing paradigm cannot meet such a massive transformative healthcare systems due to drawbacks including network latency,scalability and bandwidth.Fog computing relieves the load of conventional cloud computing by availing intermediate fog nodes between the end users and the remote servers.Assuming a massive demand of PHR data within a ubiquitous smart city,we propose a secure and fog assisted framework for PHR systems to address security,access control and privacy concerns.Built under a fog-based architecture,the proposed framework makes use of efficient key exchange protocol coupled with ciphertext attribute based encryption(CP-ABE)to guarantee confidentiality and fine-grained access control within the system respectively.We also make use of digital signature combined with CP-ABE to ensure the system authentication and users privacy.We provide the analysis of the proposed framework in terms of security and performance.展开更多
A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characterist...A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characteristics of handover in this cellular model are studied withthe emphasis on the handover initiation probability, where the distance between the MS and the BS isused as a criterion. Simulation results show that the new model is attractive on reducing handoverprobability compared with the traditional sectoring cells.展开更多
基金the Deanship of Scientific Research at King Saud University for funding this work through Vice Deanship of Scientific Research Chairs:Chair of Pervasive and Mobile Computing.
文摘The rapid development of personal health records(PHR)systems enables an individual to collect,create,store and share his PHR to authorized entities.Health care systems within the smart city environment require a patient to share his PRH data with a multitude of institutions’repositories located in the cloud.The cloud computing paradigm cannot meet such a massive transformative healthcare systems due to drawbacks including network latency,scalability and bandwidth.Fog computing relieves the load of conventional cloud computing by availing intermediate fog nodes between the end users and the remote servers.Assuming a massive demand of PHR data within a ubiquitous smart city,we propose a secure and fog assisted framework for PHR systems to address security,access control and privacy concerns.Built under a fog-based architecture,the proposed framework makes use of efficient key exchange protocol coupled with ciphertext attribute based encryption(CP-ABE)to guarantee confidentiality and fine-grained access control within the system respectively.We also make use of digital signature combined with CP-ABE to ensure the system authentication and users privacy.We provide the analysis of the proposed framework in terms of security and performance.
文摘A novel cellular architecture model is proposed, in which a cell coverage isdivided into annular zones by means of vertically multi-beam-splitting of base antenna for betterperformance. In this paper, the characteristics of handover in this cellular model are studied withthe emphasis on the handover initiation probability, where the distance between the MS and the BS isused as a criterion. Simulation results show that the new model is attractive on reducing handoverprobability compared with the traditional sectoring cells.
