Paper Info
Title
Age of Information in Random Access Networks: A Spatiotemporal Study
Abstract
We investigate the age-of-information (AoI) in the context of random access networks, in which transmitters need to send a sequence of information packets to intended receivers over shared spectrum. We establish an analytical framework that accounts for the key features of a wireless system, including the fading, path loss, network topology, as well as the spatial interactions amongst the queues. A closed-form expression is derived to quantity the network average AoI and its accuracy is verified via simulations. Our analysis unveils several unconventional behaviors of AoI in such a setting. For instance, even when the packet transmissions are scheduled in a last-come first-serve (LCFS) order whereby the newly incoming packets can replace the undelivered ones, the network average AoI may not monotonically decline with respect to the packet arrival rates, if the infrastructure is densely deployed. Moreover, the ALOHA protocol is shown to be instrumental in reducing the AoI when the packet arrival rates are high, yet it cannot contribute to decreasing the AoI in the regime of infrequent packet arrivals.
Year
DOI
Venue
2020
10.1109/GLOBECOM42002.2020.9322611
GLOBECOM 2020 - 2020 IEEE Global Communications Conference
Keywords
DocType
ISSN
random access networks,spatiotemporal study,age-of-information,information packets,intended receivers,shared spectrum,analytical framework,network topology,closed-form expression,network average AoI,packet transmissions,newly incoming packets,packet arrival rates,infrequent packet arrivals
Conference
1930-529X
ISBN
Citations 
PageRank 
978-1-7281-8299-5
2
0.37
References 
Authors
0
4
Name
Order
Citations
PageRank
howard hua yang121632.06
Ahmed M. Arafa293.28
Tony Q. S. Quek33621276.75
H. V. Poor4254111951.66