Adaptive rach power determination for mobile telecommunications user equipment unit
US6487420B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1999 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Oct 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0866
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmit power value (PRACH) for a connection request message (RACH) from a mobile user equipment unit (20) to a telecommunications network (18) is determined using a target ratio of received energy to interference value [(Eb/I0)RACH—target] and a modification factor [(Eb/I0)MEAN—DELTA]. The modification factor is a sliding mean differential between the target ratio and an actual ratio [(Eb/I0)ACTUAL] of received energy to interference as determined by the telecommunications network. The modification factor allows for the calculation of the transmit power for the connection request message to be adaptive with respect to a changing characteristic of the mobile user equipment unit (e.g., aging of the mobile user equipment unit). In one embodiment, the transmit power value determination is made at the mobile user equipment unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.