Age of information in a multiple access channel with heterogeneous traffic and an energy harvesting node

Z Chen, N Pappas, E Björnson… - IEEE INFOCOM 2019 …, 2019 - ieeexplore.ieee.org
IEEE INFOCOM 2019-IEEE Conference on Computer Communications …, 2019ieeexplore.ieee.org
Age of Information (AoI) is a newly appeared concept and metric to characterize the
freshness of data. In this work, we study the delay and AoI in a multiple access channel
(MAC) with two source nodes transmitting different types of data to a common destination.
The first node is grid-connected and its data packets arrive in a bursty manner, and at each
time slot it transmits one packet with some probability. Another energy harvesting (EH)
sensor node generates a new status update with a certain probability whenever it is …
Age of Information (AoI) is a newly appeared concept and metric to characterize the freshness of data. In this work, we study the delay and AoI in a multiple access channel (MAC) with two source nodes transmitting different types of data to a common destination. The first node is grid-connected and its data packets arrive in a bursty manner, and at each time slot it transmits one packet with some probability. Another energy harvesting (EH) sensor node generates a new status update with a certain probability whenever it is charged. We derive the delay of the grid-connected node and the AoI of the EH sensor as functions of different parameters in the system. The results show that the mutual interference has a non-trivial impact on the delay and age performance of the two nodes.
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