  We consider a system consisting of $N$ source nodes communicating with a
common receiver. Each source node has a buffer of infinite capacity to store
incoming bursty traffic in the form of status updates transmitted in packets,
which should maintain the status information at the receiver fresh. Packets
waiting for transmission can be discarded to avoid wasting network resources
for the transmission of stale information. We investigate the age of
information (AoI) performance of the system under scheduled and random access.
Moreover, we present analysis of the AoI with and without packet management at
the transmission queue of the source nodes, where as packet management we
consider the capability to replace unserved packets at the queue whenever newer
ones arrive. Finally, we provide simulation results that illustrate the impact
of the network operating parameters on the age performance of the different
access protocols.
