  Interference is a fundamental feature of the wireless channel. To better
understand the role of cooperation in interference management, the two-user
Gaussian interference channel where the destination nodes can cooperate by
virtue of being able to both transmit and receive is studied. The sum-capacity
of this channel is characterized up to a constant number of bits. The coding
scheme employed builds up on the superposition scheme of Han and Kobayashi
(1981) for two-user interference channels without cooperation. New upperbounds
to the sum-capacity are also derived.
