Providing OTDOA PRS assistance data

A Mobile Station (MS) comprising:

• a processor, wherein the processor is configured to:
• perform measurements of a set of cells in a set of neighbor cells of the MS;
• and
• a transceiver coupled to the processor, the transceiver to
• receive Observed Time Difference Of Arrival (OTDOA) assistance data including:
• an OTDOA assistance data reference cell, the OTDOA assistance data reference cell selected from the set of neighbor cells of the MS based, at least in part, on the performed measurements,
• a System Frame Number (SFN) offset between a serving cell of the MS and the OTDOA assistance data reference cell, and
• Positioning Reference Signal (PRS) information;
• wherein the processor is further configured to:
• determine an SFN of the OTDOA assistance data reference cell based on an SFN of the serving cell and the SFN-offset included in the OTDOA assistance data;
• and
• determine PRS occasions of the set of neighbor cells based on the SFN of the OTDOA assistance data reference cell and the PRS information included in the OTDOA assistance data.

A Mobile Station (MS) comprising:

• means for performing measurements of a set of cells in a set of neighbor cells of the MS;
• means for receiving Observed Time Difference Of Arrival (OTDOA) assistance data based, at least in part, on the performed measurements, the OTDOA assistance data including:
• an OTDOA assistance data reference cell, the OTDOA assistance data reference cell selected from the set of neighbor cells of the MS based, at least in part, on the performed measurements,
• a System Frame Number (SFN) offset between a serving cell of the MS and the OTDOA assistance data reference cell, and
• Positioning Reference Signal (PRS) information;
• means for determining an SFN of the OTDOA assistance data reference cell based on a SFN of the serving cell and the SFN-offset included in the OTDOA assistance data;
• and
• means for determining PRS occasions of the set of neighbor cells based on the SFN of the OTDOA assistance data reference cell and the PRS information included in the OTDOA assistance data.

A non-transitory computer-readable medium comprising instructions executable by a processor to:

• perform measurements of a set of cells in a set of neighbor cells of the MS;
• receive Observed Time Difference Of Arrival (OTDOA) assistance data based, at least in part, on the performed measurements, the OTDOA assistance data including:
• an OTDOA assistance data reference cell, the OTDOA assistance data cell selected from the set of neighbor cells of the MS based, at least in part, on the performed measurements,
• a System Frame Number (SFN) offset between a serving cell of the MS and the OTDOA assistance data reference cell, and
• Positioning Reference Signal (PRS) information;
• determine an SFN of the OTDOA assistance data reference cell based on an SFN of the serving cell and the SFN-offset included in the OTDOA assistance data;
• and
• determine Positioning Reference Signal (PRS) occasions of the set of neighbor cells based on the SFN of the OTDOA assistance data reference cell and the PRS information included in the OTDOA assistance data.