Positioning Reference Signal Assistance Data Signaling for Enhanced Interference Coordination in a Wireless Communication Network

• US 20120122472A1
• Filed: 10/05/2011
• Published: 05/17/2012
• Est. Priority Date: 11/12/2010
• Status: Abandoned Application

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola Mobility, Inc. (Lenovo Group Ltd.)
• Inventors: Krishnamurthy, Sandeep H., Love, Robert T., Nimbalker, Ajit
• Application Number:
  US13/253,833
• Publication Number:
  US 20120122472A1
• Time in Patent Office: Days
• US Class Current: 455/456.1
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method in a wireless terminal includes receiving a measurement subframe pattern indicating a first set of subframes on which a transmission from a first base station must be processed, receiving Positioning Reference Signal (PRS) subframe pattern information corresponding to a second base station, determining a subset of the first set of subframes that overlaps with subframes in the PRS subframe pattern information, and processing a transmission received in the subset of the first set of subframes from the first base station.

Claims

1. A method in a wireless terminal, the method comprising:

receiving a measurement subframe pattern indicating a first set of subframes on which a transmission from a first base station must be processed;

receiving Positioning Reference Signal (PRS) subframe pattern information corresponding to a second base station;

determining a subset of the first set of subframes that overlaps with subframes in the PRS subframe pattern information; and

processing a transmission received in the subset of the first set of subframes from the first base station.

2. The method of claim 1, wherein the PRS subframe pattern information includes at least one of:

PRS occasion time-pattern;

N_PRS, the number of consecutive subframes in one PRS occasion;

PRS bandwidth information;

number of cell-specific reference symbol (CRS) transmit antenna ports;

or

an OFDM cyclic prefix (CP) associated with the PRS subframe pattern information.

3. The method of claim 1, wherein the wireless terminal is connected to or camped on a third base station that is distinct from the second base station.

4. The method of claim 3, wherein the first base station and the third base station are identical to the serving base station.

5. The method of claim 1 further comprising receiving the measurement subframe pattern from a third base station which is a serving base station, wherein the measurement subframe pattern indicates the first set of subframes on which the transmission from the first base station must be processed.

6. The method of claim 1, wherein processing the transmission received in the subset of the first set of subframes from the first base station includes performing PRS Interference reduction for demodulation/processing of at least one desired signal from a serving cell in an associated subframe.

7. The method of claim 1, processing the transmission received in the subset of the first set of subframes from the first base station includes performing at least one of the RLM/RRM/CSI measurements for the first base station taking into account PRS IR/IC for at least one resource element containing the PRS subframe pattern information from the second base station.

8. The method of claim 1, wherein processing the transmission received in the subset of the first set of subframes from the first base station includes performing RRM measurements for a third base station taking into account PRS interference reduction for at least one resource element containing the PRS subframe pattern information from the second base station.

9. The method of claim 1 further comprising:

identifying a second subset of the first set of subframes from the first base station that do not contain PRS subframe pattern information from the second base station;

performing only CRS Interference reduction for demodulation/processing of at least one desired signal from the first base station in the second subset of subframes.

10. The method of claim 1, wherein at least one subframe in the measurement subframe pattern coincides temporally with an Almost Blank Subframe (ABS) transmission of a third base station.

11. A wireless terminal comprising:

a receiver coupled to a controller,

the controller configured to determine a subset of a first set of subframes, on which a transmission from a first base station must be processed, that overlaps with subframes in Positioning Reference Signal (PRS) subframe pattern information corresponding to a second base station,

a measurement subframe pattern, received by the receiver, indicating the first set of subframes on which the transmission from a first base station must be processed;

the controller configured to process a transmission received in the subset of the first set of subframes from the first base station.

12. The terminal of claim 11, wherein the PRS subframe pattern information includes at least one of:

PRS occasion time-pattern;

N_PRS, the number of consecutive subframes in one PRS occasion;

PRS bandwidth information;

Number of cell-specific reference symbol (CRS) transmit antenna ports;

or

OFDM cyclic prefix (CP) associated with the PRS subframe pattern information.

13. The terminal of claim 11 the receiver configured to receives the measurement subframe pattern from a third base station which is a serving base station, wherein the measurement subframe pattern indicates the first set of subframes on which the transmission from the first base station must be processed.

14. The terminal of claim 11 further comprising:

the controller configured to identify a second subset of the first set of subframes from the first base station that do not contain PRS subframe pattern information from the second base station;

the controller configured to perform only CRS reduction for demodulation/processing of at least one desired signal from the first base station in the second subset of subframes,

wherein the desired signal is one of CRS, PBCH, PCFICH, PHICH, CSI-RS, PDCCH, PDSCH, or DM-RS.

15. The terminal of claim 11, wherein at least one subframe in the measurement subframe pattern coincides temporally with an Almost Blank Subframe (ABS) transmission of a third base station.