  We consider the problem of minimizing age in a multihop wireless network.
There are multiple source-destination pairs, transmitting data through multiple
wireless channels, over multiple hops. We propose a network control policy
which consists of a distributed scheduling algorithm, utilizing channel state
information and queue lengths at each link, in combination with a packet
dropping rule. Dropping of older packets locally at queues is seen to reduce
the average age of flows, even below what can be achieved by Last Come First
Served (LCFS) scheduling. Dropping of older packets also allows us to use the
network without congestion, irrespective of the rate at which updates are
generated. Furthermore, exploiting system state information substantially
improves performance. The proposed scheduling policy obtains average age values
close to a theoretical lower bound as well.
