Method to improve the performance in cell range expansion using location based codebook subset restriction

摘要

Systems and methods are disclosed for providing location-based codebook subset restriction. In some embodiments, location-based codebook subset restriction is provided in such a manner as to mitigate co-channel interference from a macro base station to User Equipment devices (UEs) in a cell range expansion zone of a Low Power Node (LPN) within a coverage area of the macro base station. In this manner, performance of the UEs in the cell range expansion zone is improved.

主权项

1. A method of operation of a network node in a cellular communications network, comprising:
determining a codebook subset restriction for a wireless device based on a location of the wireless device within a serving cell of the wireless device, wherein determining the codebook subset restriction for the wireless device based on the location of the wireless device within the serving cell of the wireless device comprises:
determining whether the wireless device is a cell edge wireless device based on the location of the wireless device within the serving cell of the wireless device; andif the wireless device is a cell edge wireless device, selecting the codebook subset restriction such that the codebook subset restriction is a predetermined codebook subset restriction that mitigates co-channel interference to other wireless devices; and sending an indication of the codebook subset restriction to the wireless device; wherein the codebook subset restriction is dynamic.