Channel state information reference signal resource mapping

A method in a network node for serving a cell in a wireless network with at least one neighboring cell, the method comprising:

• allocating at least one resource for Channel State Information Interference Measurement, CSI-IM, within a predetermined IM region of a Resource Block, RB, of the cell, the predetermined IM region encompassing a plurality of resources of the RB of the cell, the allocated at least one resource being selected from among the plurality of resources of the IM region to reduce a likelihood that the allocated at least one resource overlaps with at least one resource allocated for CSI-IM in a neighboring cell as compared to allocating a common set of resources for CSI-IM in each neighboring cell, the predetermined IM region at least partially overlapping with a respective predetermined IM region of a RB of the neighboring cell, and the predetermined IM region of the cell not overlapping resources allocated for Non-Zero Power Channel State Information Reference Signal, NZP CSI-RS, of the neighboring cell.

A computer readable storage medium comprising instructions which when executed on at least one processor of a network node perform a method for serving a cell in a wireless network with at least one neighboring cell, the method comprising:

• allocating at least one resource for Channel State Information Interference Measurement, CSI-IM, within a predetermined IM region of a Resource Block, RB, of the cell, the predetermined IM region encompassing a plurality of resources of the RB of the cell, the allocated at least one resource being selected from among the plurality of resources of the IM region to reduce a likelihood that the allocated at least one resource overlaps with at least one resource allocated for CSI-IM in a neighboring cell as compared to allocating a common set of resources for CSI-IM in each neighboring cell, the predetermined IM region at least partially overlapping with a respective predetermined IM region of a RB of the neighboring cell, and the predetermined IM region of the cell not overlapping resources allocated for Non-Zero Power Channel State Information Reference Signal, NZP CSI-RS, of the neighboring cell.