IEEE Internet of Things Journal · 2021 · 40 citations · 37 references
EngineeringAerospace EngineeringSystems EngineeringComputer NetworksUnmanned Aircraft SystemsWireless CommunicationsCommunication LinksCommunication SystemsFinite Blocklength Information TheoryMobile CommunicationNetwork Information TheoryWireless Communication ProtocolsAerial Relay NetworksCommunication Network AnalysisFinite Blocklength AnalysisLow-latency NetworkingNode-to-node CommunicationStochastic Dynamical SystemsStochastic Hybrid SystemsWireless Communication Systems
This article considers an unmanned aerial vehicles (UAVs) communication network, where UAV operate as an aerial mobile relay between a source and a destination of the network. To capture the “timeliness” of the received information at the destination node, a new performance metric named Age of Information (AoI) is considered. In addition, a short packet communication scheme maintains low latency in the proposed UAV wireless communication system. The finite block-length theory investigates the performances of the short packet communications scheme in the UAV-assisted wireless communications system. In this article, the Average AoI (AAoI) is estimated by applying the stochastic hybrid systems (SHSs) model. The SHS model comprises discrete states represents events that reset the AoI process and continuously dynamics that represent linearly growing age processes. Finally, a closed-form expression for the AAoI of the proposed UAV wireless communication system is derived and it can be used to estimate the optimal altitude, block length, and other parameters.
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Update or Wait: How to Keep Your Data Fresh
Yin Sun, Elif Uysal‐Biyikoglu, Roy D. Yates et al. · IEEE Transactions on Information Theory · 2017 · 843 citations