Patent ID: 9438451
Filing Date: 2016-09-06
CPC Classification: H04B,H04L

Claim Text:
1. A method to measure Channel State Information-Reference Signal (CSI-RS) information for a three-dimensional Multiple Input Multiple Output (3D-MIMO) configuration of a 3 rd Generation Partnership Project Long Term Evolution (3GPP LTE) wireless network, the method comprising: receiving at a wireless terminal device Channel State Information (CSI) configuration information for a plurality of CSI-RS ports, the plurality of CSI-RS ports corresponding to a 3D arrangement of antennas and being grouped into a plurality of CSI-RS port groups, wherein the plurality of CSI-RS ports comprises greater than eight CSI-RS ports, and wherein each of the plurality of CSI-RS port groups comprises a corresponding CSI process; measuring at the wireless terminal device CSI-RS information corresponding to each respective CSI-RS group, wherein a first combination of the CSI processes is performed in a first group of physical resource blocks, and a second combination of the CSI processes performed in a second group of physical resource blocks, the second combination being different from the first combination, until CSI-RS measurements have been obtained for the greater than eight CSI-RS ports; and sending from the wireless terminal device the CSI-RS information as feedback for selecting at least one vertical precoding vector for configuring the CSI-RS ports of the 3D antenna arrangement.