Enhanced mechanism of uplink time alignment maintenance for inter-eNB carrier aggregation
US10368328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Aug 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0092
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Apparatus and method are provided to configure two-tier identifiers for serving cells of a UE configured with inter-eNB carrier aggregation (CA). In one novel aspect, cell group identifiers are configured. The cell group identifier is a super set of one or more uplink group identifiers that are associated with serving cells served by the same base station. In one embodiment, different MAC entities are associated with different cell group identifiers. The UE performs uplink alignment, monitoring and management procedures linking to the cell group identifier. In another novel aspect, a group TAG, which is a super set identifier of one or more cell TAGs associated with serving cells served by the same base station, is configured. In one embodiment, the UE performs uplink alignment procedure based on the status of the group TAG, which is determined based on the status of the cell TAGs associated with the group TAG.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.