Method for reporting channel state information for 3-dimensional beam forming in wireless communications system
US9900068B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2014 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Jul 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0639
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for reporting the channel state information for a 3-dimensional beam forming in a wireless communications system. A method for transmitting the channel state information (CSI) in a wireless communications system includes the steps of: receiving a reference signal from a base station supporting a 2-dimensional antenna array; determining the CSI based on the reference signal; and transmitting the determined CSI to the base station. The CSI includes the CSI set for each of T beam candidates defined in one dimension of the 2-dimensional antenna array. The CSI set includes at least one of the rank index (RI) in the one dimension, the pre-coding matrix (PMI) index in the one dimension, the RI in the two dimensions, the PMI in the two dimensions, and the channel quality index (CQI). Here, the RI in the two dimensions is variable for each of the T beam candidates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.