  In networks of mobile autonomous agents, e.g. for data acquisition, we may
wish to maximize data transfer or to reliably transfer a minimum amount of
data, subject to quality of service or energy constraints. These requirements
can be guaranteed through both offline node design/specifications and online
trajectory/communications design. Regardless of the distance between them, for
a stationary point-to-point transmitter-receiver pair communicating across a
single link under average power constraints, the total data transfer is
unbounded as time tends to infinity. In contrast, we show that if the
transmitter/receiver is moving at any constant speed away from each other, then
the maximum transmittable data is bounded. Although general closed-form
expressions as a function of communication and mobility profile parameters do
not yet exist, we provide closed-form expressions for particular cases, such as
ideal free space path loss. Under more general scenarios we instead give lower
bounds on the total transmittable information across a single link between
mobile nodes.
