Method and apparatus for determining a HARQ-ACK codebook for carrier aggregation
US11476980B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2018 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1864
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present application is related to a method and apparatus for determining a hybrid automatic repeat request-acknowledge (HARQ-ACK) codebook for carrier aggregation (CA). A method for determining a HARQ-ACK codebook for CA includes receiving a first control signal on a carrier within a carrier group in a slot, wherein the first control signal includes an indicator for indicating whether the carrier is a last scheduled carrier of the carrier group for downlink transmissions. The method further includes transmitting a hybrid automatic repeat request acknowledgement (HARQ-ACK) codebook corresponding to the downlink transmissions in the slot for the carrier group, wherein, based on the first control signal, one or more HARQ-ACK bits for the last scheduled carrier are arranged at the end of the HARQ-ACK codebook. The present application reduces signaling overhead for a HARQ-ACK codebook and avoids misunderstanding between a base unit and a remote unit when determining the HARQ-ACK codebook for CA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.