Random access preamble transmission
US8565142B1 · kind B1 · utility
91Cited by
0References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 20, 2013 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Jul 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A base station transmits control message(s) to assign a secondary cell to a cell group in a plurality of cell groups comprising a primary cell group and a secondary cell group. The base the base station transmits a control command to the wireless device. The control command is configurable to cause transmission of a first random access preamble on a secondary cell in the secondary cell group. The control command is unconfigurable to cause transmission of a second random access preamble on any secondary cell in the primary cell group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.