Patent ID: 9225478
Filing Date: 2015-12-29
Classification: H04L,H04W,Y02D,Y02E

Abstract:
1. A device for reducing feedback overhead associated with multiple vertical beams from a two-dimensional antenna array having a plurality of rows of antenna elements and a plurality of columns of antenna elements for wireless communication, comprising: a receive module, at a User Equipment (UE), configured to receive multiple Channel State Information-Reference Signal (CSI-RS) resources, wherein a CSI-RS resource corresponds to one of multiple vertical beam configurations associated with the plurality of columns of antenna elements; and a selection module, at the UE, configured to select a subset of multiple vertical beam configurations for which to provide CSI-RS reports to reduce a number of CSI-RS reports, leaving a set of non-selected CSI-RS resources unreported; and a preparation module, at the UE, configured to prepare at least one CSI-RS report for the subset of multiple vertical beam configurations; and a reporting module, at the UE, to send the at least one CSI-RS report to an evolved Node B (eNodeB), wherein the two-dimensional antenna array, including the plurality of rows of antenna elements and the plurality of columns of antenna elements, is located at the eNodeB.