Handling TAT expiry of multiple TAGs
US12323936B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2024 |
| Grant date | Jun 3, 2025 |
| Priority date | — |
| Expiry date | Oct 21, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0833
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Example embodiments of the present disclosure provide a solution for handling expiry of at least one time alignment timer (TAT) of multiple timing advance groups (TAGs) associated with a serving cell. In an example method, the terminal device receives determines at least two TAGs for a serving cell, wherein the at least two TAGs comprise a primary TAG and a secondary TAG. The terminal device determines whether at least one TAT of the at least two TAGs has expired and maintain, based on determining that the at least one TAT has expired, one of the primary TAG and the secondary TAG. In this way, only a single TAG is maintained once the terminal device has single TAT/no TAT running removing ambiguities in RA procedure/UL signal transmissions. Since the network is aware of the TAT expiry, it knows behaviour of the terminal device and can act accordingly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.