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