Method and apparatus for obtaining uplink timing alignment on a secondary cell
US9854608B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2015 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jun 5, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0838
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for uplink timing alignment in a wireless transmit/receive unit is provided. The method includes receiving control signaling from an evolved Node B, receiving on a primary cell (PCell) a physical downlink control channel (PDCCH) order, the PDCCH order including a carrier indicator field indicating a secondary cell (SCell) to transmit a physical random access channel (PRACH) transmission. In response to the PDCCH order, transmitting the PRACH transmission, and in response to the PRACH transmission, monitoring the PCELL for a random access response (RAR). In response to detecting an RAR associated with the PRACH transmission, adjusting timing for the SCell in response to a timing advance included in the RAR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.