Radio communication method, user terminal, radio base station and radio communication system
US9319120B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Jul 31, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention is designed so that it is possible to feed back channel state information (CSI) that is suitable for downlink communication in which 3D beams are used. The radio communication method of the present invention is a radio communication method to allow a radio base station to carry out downlink communication with a user terminal by using a 3D beam that is formed with a horizontal beam having directivity in a horizontal plane and a vertical beam having directivity in a vertical plane, and has the steps in which the radio base station transmits a plurality of measurement reference signals that are pre-coded using different precoding weights between a plurality of vertical beams, and the user terminal transmits channel state information that is generated based on the plurality of measurement reference signals, to the radio base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.