  In this paper, the well-known forwarder's dilemma is generalized by
accounting for the presence of link quality fluctuations; the forwarder's
dilemma is a four-node interaction model with two source nodes and two
destination nodes. It is known to be very useful to study ad hoc networks. To
characterize the long-term utility region when the source nodes have to control
their power with partial channel state information (CSI), we resort to a recent
result in Shannon theory. It is shown how to exploit this theoretical result to
find the long-term utility region and determine good power control policies.
This region is of prime importance since it provides the best performance
possible for a given knowledge at the nodes. Numerical results provide several
new insights into the repeated forwarder's dilemma power control problem; for
instance, the knowledge of global CSI only brings a marginal performance
improvement with respect to the local CSI case.
