Back to results
US 2014/0176366 A1Published application
Positioning reference signal (prs) generation for multiple transmit antenna systems
AssigneeQUALCOMM Incorporated
InventorsSven FISCHER, Peter GAAL, Stephen William EDGE, Arash MIRBAGHERI, Tingfang JI, Guttorm R. OPSHAUG
Life of this patent
Estimating the term…
Abstract
A method of providing Observed Time Difference of Arrival (OTDOA) assistance information to a mobile station is disclosed. In some embodiments, the OTDOA assistance information may comprise Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell. In one embodiment, the method may be implemented on a location server for the cell.
Claims59
A method of providing Observed Time Difference of Arrival (OTDOA) assistance information from a server, the method comprising:
- sending the OTDOA assistance information to a mobile station (MS), the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell in a subset of cells served by the server.
A server comprising:
- a communications interface, the communications interface to send Observed Time Difference of Arrival (OTDOA) assistance information to a mobile station;
- and
- a processor coupled to the communications interface, the processor configured to generate the OTDOA assistance information for at least one cell in a subset of cells served by the server, the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for the at least one cell.
A server comprising:
- means for sending Observed Time Difference of Arrival (OTDOA) assistance information to a mobile station;
- and
- processing means coupled to the means for sending OTDOA assistance information, the processing means to generate the OTDOA assistance information for at least one cell in a subset of cells served by the server, the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell.
A non-transitory computer-readable medium comprising instructions which, when executed by a processor, perform steps in a method for providing Observed Time Difference of Arrival (OTDOA) assistance information from a server, the steps comprising:
- sending the OTDOA assistance information to a mobile station, the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell in a subset of cells served by the server.
A method comprising:
- receiving Observed Time Difference of Arrival (OTDOA) assistance information at a mobile station (MS), wherein the OTDOA assistance information comprises Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell;
- determining whether physical transmitting antenna element switching is used by the at least one cell based, at least in part, on the received antenna switching assistance information;
- and
- if physical transmitting antenna element switching is used by the at least one cell, then, selecting a Time of Arrival (TOA) value for a PRS from a set of TOA values determined based on measurements at the MS during a single PRS positioning occasion, wherein the PRS is received by the MS and the selected TOA value is indicative of a shorter distance between a source of the PRS and the MS than other TOA values in the set of TOA values.
1 more element
A mobile station (MS) comprising:
- a transceiver capable of receiving a Positioning Reference Signal (PRS) and Observed Time Difference of Arrival (OTDOA) assistance information, wherein the OTDOA assistance information comprises PRS assistance information including antenna switching assistance information for at least one cell;
- and
- a processor coupled to the transceiver, the processor configured to:
- determine whether physical transmitting antenna element switching is used by the at least one cell based, at least in part, on the received antenna switching assistance information, and
- select a Time of Arrival (TOA) value for a PRS from a set of TOA values determined based on measurements during a single PRS positioning occasion, wherein the PRS is received by the MS and the selected TOA value is indicative of a shorter distance between a source of the PRS and the MS than other TOA values in the set of TOA values, if physical transmitting antenna element switching is used by the at least one cell.
2 more elements
A mobile station comprising:
- transceiver means, the transceiver means to receive a Positioning Reference Signal (PRS) and Observed Time Difference of Arrival (OTDOA) assistance information, wherein the OTDOA assistance information comprises PRS assistance information including antenna switching assistance information for at least one cell;
- and
- processing means coupled to the transceiver means, the processing means further comprising:
- means for determining whether physical transmitting antenna element switching is used by the at least one cell based, at least in part, on the received antenna switching assistance information, and
- means for selecting a Time of Arrival (TOA) value for a PRS from a set of TOA values determined based on measurements during a single PRS positioning occasion, wherein the PRS is received by the mobile station (MS) and the selected TOA value is indicative of a shorter distance between a source of the PRS and the MS than other TOA values in the set of TOA values, if physical transmitting antenna element switching is used by the at least one cell.
2 more elements
A non-transitory computer-readable medium comprising instructions, which when executed by a processor, perform steps in a method, the steps comprising:
- receiving Observed Time Difference of Arrival (OTDOA) assistance information at a mobile station (MS), wherein the OTDOA assistance information comprises Positioning Reference Signal (PRS) assistance information including antenna switching assistance information for at least one cell;
- determining whether physical transmitting antenna element switching is used by the at least one cell based, at least in part, on the received antenna switching assistance information;
- and
- if physical transmitting antenna element switching is used by the at least one cell, then, selecting a Time of Arrival (TOA) value for a PRS from a set of TOA values determined based on measurements at the MS during a single PRS positioning occasion, wherein the PRS is received by the MS and the selected TOA value is indicative of a shorter distance between a source of the PRS and the MS than other TOA values in the set of TOA values.
1 more element
A method of generating a Positioning Reference Signal (PRS) sequence for a system comprising a plurality of physical transmitting antenna elements serving a single cell, the method comprising:
- assigning a distinct Physical Antenna Port (PAP) identifier (ID) to a subset of the plurality of physical transmitting antenna elements;
- and
- generating PRS sequences for the subset of the plurality of physical transmitting antenna elements, wherein each PRS sequence corresponds to a physical transmitting antenna element in the subset of the plurality of physical transmitting antenna elements, and a function ƒ(PAPh) is added to a seed for a length-31 Gold sequence used to generate a PRS sequence for a corresponding physical transmitting antenna element, the function ƒ(PAPh) being based on the PAP ID (h) of the corresponding physical transmitting antenna element.
An apparatus comprising:
- a communications interface, the communications interface to send Observed Time Difference of Arrival (OTDOA) assistance information to a mobile station (MS), wherein OTDOA assistance information comprises Physical Antenna Port (PAP) identifiers (IDs);
- and
- a processor coupled to the communications interface, the processor configured to:
- assign a distinct PAP ID to each of a plurality of physical transmitting antenna elements serving a single cell, and
- generate PRS sequences for a subset of the plurality of physical transmitting antenna elements, wherein each PRS sequence corresponds to a physical transmitting antenna element in the subset of the plurality of physical transmitting antenna elements, and a function ƒ(PAPh) is added to a seed for a length-31 Gold sequence used to generate a PRS sequence for a corresponding physical transmitting antenna element, the function ƒ(PAPh) being based on a PAP ID (h) of the corresponding physical transmitting antenna element.
2 more elements
An apparatus comprising:
- communications means, the communications means configured to send Observed Time Difference of Arrival (OTDOA) assistance information to a mobile station (MS), wherein OTDOA assistance information comprises Physical Antenna Port (PAP) identifiers (IDs);
- and
- processing means coupled to the communications means, the processing means further comprising:
- means for assigning a distinct PAP ID to each of a plurality of physical transmitting antenna elements serving a single cell, and
- means for generating PRS sequences for a subset of the plurality of physical transmitting antenna elements, wherein each PRS sequence corresponds to a physical transmitting antenna element in the subset of the plurality of physical transmitting antenna elements, and a function ƒ(PAPh) is added to a seed for a length-31 Gold sequence used to generate a PRS sequence for a corresponding physical transmitting antenna element, the function ƒ(PAPh) being based on a PAP ID (h) of the corresponding physical transmitting antenna element.
2 more elements
A non-transitory computer-readable medium comprising instructions, which, when executed by a processor, perform steps in a method of generating a Positioning Reference Signal (PRS) sequence for a system comprising a plurality of physical transmitting antenna elements serving a single cell, the steps comprising:
- assigning a distinct Physical Antenna Port (PAP) identifier (ID) to a subset of the plurality of physical transmitting antenna elements;
- and
- generating PRS sequences for the subset of the plurality of physical transmitting antenna elements, wherein each PRS sequence corresponds to a physical transmitting antenna element in the subset of the plurality of physical transmitting antenna elements, and a function ƒ(PAPh) is added to a seed for a length-31 Gold sequence used to generate a PRS sequence for a corresponding physical transmitting antenna element, the function ƒ(PAPh) being based on a PAP ID (h) of the corresponding physical transmitting antenna element.
Dependencies are inferred from the claim text.