Communications device, base station, and communications method

A communication apparatus, comprising:

• processing circuitry configured to
• group users in a 3D beamforming space of a current cell into a plurality of space user groups;
• determine group configuration information of the users in the 3D beamforming space of the current cell;
• and
• notify a neighbor cell of the group configuration information of the users in the 3D beamforming space of the current cell to assist inter-cell interference coordination, the group configuration information including information regarding whether the users are grouped statically or dynamically, the information regarding whether the users are grouped statically or dynamically indicating whether the users are grouped based on a fixed rule that does not change depending on time or an unfixed rule that changes depending on time, wherein
• the current cell is configured with an antenna array comprising a plurality of physical antennae to achieve 3D beamforming, and
• the fixed rule is based on a predetermined space area range, and the unfixed rule is based on a current traffic requirement.