Ioannidis et
al. [14] study the dissemination of dynamic content,
such as news and traffic information, over
an MSN. In this application, mobile users subscribe
to a dynamic-content distribution service
offered by their service provider. To improve
coverage and increase capacity, it is assumed
that users share any content updates they receive
with other users they meet. Reference 14 determines
how the service provider can allocate its
bandwidth optimally to make the content at
users as “fresh” as possible. Moreover, there is a
condition under which the system with high scalability
is specified: even if the total bandwidth
dedicated by the service provider remains fixed,
the expected content age at each user grows
slowly (as log(n)) with the number of users n.