Adaptation of cyclic shift for random access preambles
US8879412B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2010 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | May 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0833
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention enables automatic configuration of random access parameters. The base station is configured to control PRACH transmission of UEs, wherein the UE PRACH transmission comprises transmission of PRACH preambles constructed of root sequences. This is achieved by storing statistics associated with previous transmissions. A parameter associated with the construction of the PRACH is tuned based on the stored statistics. The base station controls the UE PRACH transmission by transmitting information to the UEs relating to the tuned parameter. This information is used by the UE when constructing the PRACH preambles. In this way, the cell parameters relating to random access can be improved to fit better to individual cells resulting in improved resource usage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.