We introduce a technique to achieve dirty paper coding (DPC) capacity asymptotically
with minimum feedback required reported to date in literature.
Our approach called {\em opportunistic interference management}, is based on a new
multiuser diversity scheme designed for wireless cellular networks. When there are $M$ antennas at
the base station with $K$ mobile users in the cell, the proposed technique only requires $M$ integer numbers related to
channel state information (CSI) between mobile users and base station. The encoding and decoding
complexity of this scheme is the same as that of point-to-point
communications. We introduce techniques to guarantee fairness and to incorporate
 {\em opportunistic interference management} into existing TDMA standards. We also introduce an antenna selection diversity to reduce the minimum required mobile users in a cell for a given multiplexing gain.