Patent ID: 8879496
Filing Date: 2014-11-04
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A method comprising: a) receiving, by a first base station from a second base station, at least one application protocol message, said first base station and said second base station configured to communicate with a plurality of wireless devices employing a downlink carrier, said downlink carrier comprising a plurality of resource blocks, said at least one application protocol message comprising a downlink beamforming information element for at least one resource block in said downlink carrier, said downlink beamforming information element indicating a second beamforming codeword employed by said second base station for said at least one resource block, said second beamforming codeword: b) selecting, by said first base station for said at least one resource block, a first beamforming codeword from a first beamforming codebook, said selection being based, at least in part, on said downlink beamforming information element received from said second base station; and c) transmitting, by said first base station, employing said first beamforming codeword, signals on a subset of said at least one resource block to a wireless device.