Method and arrangement for DL-OTDOA (downlink observed time difference of arrival) positioning in a LTE (long term evolution) wireless communications system
US8908586B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2009 |
| Grant date | Dec 9, 2014 |
| Priority date | — |
| Expiry date | Feb 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/30
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates generally to methods and arrangements for positioning in a wireless communications system, such as LTE. In particular, the present invention relates to improving positioning accuracy. The invention provides methods and arrangements for scheduling positioning subframes, i.e. low interference subframes, for allowing aligning of positioning subframes across a number of cells in order to reduce the interference from data symbols of cells in the neighborhood of a cell serving the UE that is performing positioning measurements. A time instance during which transmission of the positioning subframes is to occur in a wireless communications network is selected. The base stations in the wireless communications network are informed about the selected time instance, whereupon the base stations schedule and transmit the positioning subframes based on the selected time instance, whereby the positioning subframes are aligned throughout the network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.