Recovery from uplink timing alignment failures in cellular communications
US9210673B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2013 |
| Grant date | Dec 8, 2015 |
| Priority date | — |
| Expiry date | Jun 21, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Regaining uplink synchronization after timing alignment failure in cellular communications. An out-of-sync condition with a cellular network may be detected. A first type of random access procedure may be initiated in response to detecting the out-of-sync condition. It may be determined whether or not a message transmitted as part of the first type of random access procedure is received by the cellular network. If the message transmitted as part of the first type of RACH is received by the network and no response to the message is received from the cellular network, a second type of RACH may be initiated. The second type of RACH may include a message having an indication that an out-of-sync condition occurred.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.