Method and apparatus for obtaining uplink timing alignment on a secondary cell
US10588154B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2017 |
| Grant date | Mar 10, 2020 |
| Priority date | — |
| Expiry date | Nov 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0838
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for uplink timing alignment by a wireless transmit/receive unit is provided. The method includes receiving a PDCCH order on a PCell. In response to the PDCCH order, on a condition that a maximum transmission power level is determined to be exceeded by an expected transmission power level of the indicated PRACH transmission and an another scheduled transmission, the WTRU may determine to scale or drop an indicated PRACH transmission. On a condition that the indicated PRACH transmission is determined to be scaled, the WTRU may transmit the indicated PRACH transmission at a scaled power. The method further comprises monitoring the PCell for a RAR and in response to detecting an RAR associated with the PRACH transmission, adjusting a timing for the SCell based on a timing advance included in the RAR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.