Status update freshness in slotted ALOHA networks is an important issue for Internet of things scenarios with large number of nodes and uncoordinated access. We compare the age of information of three different implementations of a backoff to counteract collisions due to uncoordinated medium access, where the transmission probability is (i) gradually decreased, (ii) turned to 0 after a collision, or (iii) turned to 0 proactively. We discuss whether these strategies decrease the average AoI of the nodes, and highlight how their efficiency changes with a distributed application in a game theoretic fashion. As a result, the gradual backoff scheme is not recommended, whereas the reactive scheme has an optimal performance inferior to the proactive one, but obtains analogous results at the Nash equilibrium, and can be a candidate for practical implementations.
Analysis of Age of Information in Slotted ALOHA Networks With Different Strategic Backoff Schemes
Buratto A.;Badia L.
2023
Abstract
Status update freshness in slotted ALOHA networks is an important issue for Internet of things scenarios with large number of nodes and uncoordinated access. We compare the age of information of three different implementations of a backoff to counteract collisions due to uncoordinated medium access, where the transmission probability is (i) gradually decreased, (ii) turned to 0 after a collision, or (iii) turned to 0 proactively. We discuss whether these strategies decrease the average AoI of the nodes, and highlight how their efficiency changes with a distributed application in a game theoretic fashion. As a result, the gradual backoff scheme is not recommended, whereas the reactive scheme has an optimal performance inferior to the proactive one, but obtains analogous results at the Nash equilibrium, and can be a candidate for practical implementations.
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