Stochastic transmission power level adjustment in a random access channel in a radio communications system and method
US7526307B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2000 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Apr 4, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0833
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A number of subscriber stations use a random access channel in an uncoordinated manner and transmit signals in the channel at a transmission power level which is set on the basis of a random principle. Deterministic transmission power level control is replaced by stochastic transmission power level control. For repeated transmission from two subscriber stations, it is improbable that both will once again transmit at the same transmission power level. If collisions occur between two transmissions which do not now have the same received power level at the base station, then, providing the power level difference is sufficient, at least the more powerful signal can be evaluated (capture effect) and only the transmission of the weaker power level signal need be repeated. Thus, on average, this reduces the delay before successful reception of the transmissions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.