Dynamic forward error correction in UTRA systems
US6967940B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Mar 22, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/542
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A UE transmitter in a 3G UTRAN wireless communication system performs dynamic link adaptation (DLA) with dynamic semi-static parameters for overcoming RF propagation difficulties. Separate transport channels (DCH) are defined for each semi-static parameter, including forward error coding (FEC) coding type and rate. When data rate is decreased during DLA, a TFC is selected having the desired FEC coding type and rate. Since this adjustment occurs at each TTI, mapping of data packet codes in each timeslot on the physical channel includes the benefit of FEC rather than reduced data rate alone. This permits improved SIR in a timeslot that may be experiencing RF propagation difficulties during the UL mapping process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.