Almost-blank subframe configuration detection in heterogeneous networks
US9179396B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2011 |
| Grant date | Nov 3, 2015 |
| Priority date | — |
| Expiry date | Apr 21, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/045
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for detecting an Almost-Blank Subframe (ABS) configuration for an interfering macro cell of a heterogeneous network is implemented in a wireless terminal. For one or more resource blocks in a received signal, a first power metric is calculated as a function of channel response estimates determined for predicted cell-specific (or common) reference signal (CRS) resource element locations in a plurality of symbols. For the one or more resource blocks in the received signal, a second power metric is calculated as a function of channel response estimates determined for the predicted CRS resource element locations in a single one of the plurality of symbols. A difference between the first and second power metrics is compared to a threshold, and responsive to the comparison a determination is made as to whether the macro cell is operating in a Multicast and Broadcast Single Frequency Network (MBSFN) mode or a non-MBSFN mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.