Channel selection using a listen before talk procedure
US11219062B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Aug 9, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0838
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Wireless communications between a base station and one or more wireless devices are described. Multiple downlink reference signals may correspond to multiple random access resources for a random access procedure. A base station may provide a set of downlink reference signals before a set of physical random access channels (PRACHs) are available for use. A wireless device performing a random access procedure may select two or more random access resource occasions (e.g., PRACH occasions) based on the downlink reference signals. Using a listen before talk (LBT) procedure, the wireless device may select a first available random access resource occasion from the two or more random access resource occasions that are determined to be clear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.