  In this paper, we investigate the half-duplex cooperative communication
scheme of a two user Gaussian interference channel. We develop achievable
region and outer bound for the case when the system allow either transmitter or
receiver cooperation. We show that by using our transmitter cooperation scheme,
there is significant capacity improvement compare to the previous results,
especially when the cooperation link is strong. Further, if the cooperation
channel gain is infinity, both our transmitter and receiver cooperation rates
achieve their respective outer bound. It is also shown that transmitter
cooperation provides larger achievable region than receiver cooperation under
the same channel and power conditions.
