The world is developing an app that alerts my smartphone when a COVID-19 (COrona VIrus Disease 19) confirmed case comes near me. However, regardless of what will be put to practical use first, the COVID-19 tracking system should satisfy the issues of legalization of location tracking and scalability as a public platform used by the world. Additional problems need solutions related to real-time authentication for information gathering, blind naming and privacy of tracked persons, and quality of service on the Query/Reply procedure. This paper proposes the Software-Defined Networking Controller-centric global public platform to monitor and track information for the COVID-19 relevant people and provide real-time information disclosure services to world-wide Centers for Disease Control and Prevention (CDCs) and regular users. The CDC manages a list of people who needs to be monitored related to the COVID-19 and forcibly installs COVID-19 virtual Internet of Things (vIoT) nodes in the form of applications on their smartphones. In addition to these nodes, the vIoT support nodes also engage as information providers to improve the quality of information services. The design of our platform aims to ensure confidentiality and authentication services giving individually different secret keys. In addition, our platform meets system scalability and reduces Query/Reply latency, where the platform accommodates a large number of world-wide CDCs and persons in control per CDC.

5G wireless devices are expected to be the main cause of the rapid increase in Internet traffic. One of the solutions is to develop the mobile devices that can deal with local traffic directly instead of conveying data through a base station. Then, the mobile devices act in a way that they can meet either infrastructure or ad hoc D2D mode communications requirements. This paper aims to design joint operation protocol of the routing control and group key agreement based on the idea that the dual operation of infrastructure and ad hoc D2D mode communications in the same wireless device requires the ad hoc node to rely on the network layer function as small as possible. In this paper, we propose the ad hoc D2D protocol to control the ad hoc D2D network and manage the group key in self-organized group of ad hoc nodes based on their home IP addresses wherever they move. Finally, this paper analyzes the latency time for the group key agreement process, which can show the tolerable size of the ad hoc network running with the group key agreement process.

The existing LTE mobile system uses the vertical model to handle the session-based security management. However, the goal of this paper is to propose a packet key-based security management scheme on the blockchain control plane to enhance the existing session key-based security scheme and overcome the limitation that the existing vertical model, as well as the Software-Defined Networking (SDN) based horizontal model, confronts within solving end-to-end security management. The proposed blockchain-based security management (BSM) scheme enables each peer to easily obtain the necessary parameters required to manage the packet key-based security system. The important features of the BSM scheme include the renewal process, which enables the different packet data streams to use completely different security parameters for the security management. In addition, because even blind values cannot be exposed to the possible attackers, our BSM scheme guarantees very secure end-to-end data transfer against active attacks such as falsification of data and transactions. Finally, this paper compares the BSM scheme with the existing vertical model to prove the advantageous effects on latency.

Voice over Internet protocol (VoIP) quality monitoring platforms need to be as simple as possible, especially at low capacity end‐points, such as smart phones. The existing simple packet loss‐based quality model, with only the input metric of the packet loss parameter, needs to be enhanced to increase the accuracy of quality prediction while ensuring that implementation is simple. Several burstiness parameters for describing burst loss characteristics in VoIP packet streams has been presented. The authors investigate how closely each one is correlated to perceptual quality. Then, from the correlation results, two dominant parameters are chosen that will be used as additional input metrics to increase the accuracy of quality prediction. A packet loss‐based and enhanced quality prediction model is also proposed for VoIP services over the Internet. This can replace the speech quality estimation model in ITU G.1070, which aims to implement VoIP quality monitoring platforms at low capacity end‐points. Thus, mobile end‐points, such as smart phones, can embed the proposed quality prediction model to measure VoIP quality on a real‐time basis.