Radio communication method, radio communication system, radio base station and user terminal
US9749998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2013 |
| Grant date | Aug 29, 2017 |
| Priority date | — |
| Expiry date | Sep 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0064
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio communication method of a user terminal and a radio base station adopting carrier aggregation to adequately feed back channel state information of a plurality of cells from a user terminal to a radio base station, is disclosed. The user generates channel state information of each cell in uplink control channel format 2 or in format 3 based on the number of cells to use in carrier aggregation, feeds back the generated channel state information via resources that the radio base station sets in an uplink control channel of a primary cell at a predetermined time in accordance with an uplink control channel format, and the radio base station secures the resources to set in the uplink control channel when the channel state information of the primary cell is generated in uplink control channel format 2, regardless of the number of cells to use in carrier aggregation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.