Positioning reference signal (PRS) generation for multiple transmit antenna systems
First Claim
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1. A processor-implemented method of providing Observed Time Difference of Arrival (OTDOA) assistance information from a location server, the method comprising:
- sending, via a communications interface on the location server, the OTDOA assistance information to a User Equipment (UE), the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information, wherein when physical transmitting antenna element switching is used by at least one cell in a subset of cells served by the location server, the PRS assistance information includes antenna switching assistance information for the at least one cell, wherein the antenna switching assistance information further comprises at least one of;
one or more parameters, and wherein each of the one or more parameters;
identifies a cell in the subset of cells served by the location server, andindicates whether physical transmitting antenna element switching occurs between PRS positioning occasions for the cell;
or,information pertaining to an antenna switching interval.
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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.
61 Citations
69 Claims
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1. A processor-implemented method of providing Observed Time Difference of Arrival (OTDOA) assistance information from a location server, the method comprising:
sending, via a communications interface on the location server, the OTDOA assistance information to a User Equipment (UE), the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information, wherein when physical transmitting antenna element switching is used by at least one cell in a subset of cells served by the location server, the PRS assistance information includes antenna switching assistance information for the at least one cell, wherein the antenna switching assistance information further comprises at least one of; one or more parameters, and wherein each of the one or more parameters; identifies a cell in the subset of cells served by the location server, and indicates whether physical transmitting antenna element switching occurs between PRS positioning occasions for the cell;
or,information pertaining to an antenna switching interval. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A location server comprising:
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a communications interface, the communications interface to send Observed Time Difference of Arrival (OTDOA) assistance information to User Equipment (UE); 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 location server, the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information, wherein when physical transmitting antenna element switching is used by the at least one cell, the PRS assistance information includes antenna switching assistance information for the at least one cell, wherein the antenna switching assistance information further comprises at least one of; one or more parameters, and wherein each of the one or more parameters; identifies a cell in the subset of cells served by the location server, and indicates whether physical transmitting antenna element switching occurs between PRS positioning occasions for the cell;
or,information pertaining to an antenna switching interval. - View Dependent Claims (8, 9, 10, 11)
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12. A location server comprising:
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means for sending Observed Time Difference of Arrival (OTDOA) assistance information to a User Equipment (UE); and means for generating the OTDOA assistance information for at least one cell in a subset of cells served by the location server, the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information, wherein when physical transmitting antenna element switching is used by the at least one cell, the PRS assistance information includes antenna switching assistance information for the at least one cell, wherein the antenna switching assistance information further comprises at least one of; one or more parameters, and wherein each of the one or more parameters; identifies a cell in the subset of cells served by the location server, and indicates whether physical transmitting antenna element switching occurs between PRS positioning occasions for the cell;
or,information pertaining to an antenna switching interval. - View Dependent Claims (13, 14, 15, 16)
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17. A non-transitory computer-readable medium comprising executable instructions for providing Observed Time Difference of Arrival (OTDOA) assistance information from a location server, wherein the executable instructions configure a processor to:
send, via a communications interface on the location server, the OTDOA assistance information to a User Equipment (UE), the OTDOA assistance information comprising Positioning Reference Signal (PRS) assistance information, wherein when physical transmitting antenna element switching is used by at least one cell in a subset of cells served by the location server, the PRS assistance information includes antenna switching assistance information for the at least one cell, wherein the antenna switching assistance information further comprises at least one of; one or more parameters, and wherein each of the one or more parameters; identifies a cell in the subset of cells served by the location server, and indicates whether physical transmitting antenna element switching occurs between PRS positioning occasions for the cell;
or,information pertaining to an antenna switching interval. - View Dependent Claims (18, 19, 20, 21)
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22. A method comprising:
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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. - View Dependent Claims (23, 24, 25)
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26. A mobile station (MS) comprising:
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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. - View Dependent Claims (27, 28)
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29. A mobile station comprising:
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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. - View Dependent Claims (30, 31)
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32. A non-transitory computer-readable medium comprising instructions, which when executed by a processor, perform steps in a method, the steps comprising:
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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. - View Dependent Claims (33, 34, 35)
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36. 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:
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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. - View Dependent Claims (37, 38, 39, 40, 41)
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42. An apparatus comprising:
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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. - View Dependent Claims (43, 44, 45, 46, 47)
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48. An apparatus comprising:
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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. - View Dependent Claims (49, 50, 51, 52, 53)
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54. 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:
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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. - View Dependent Claims (55, 56, 57, 58, 59)
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60. A method on a mobile station comprising:
receiving a plurality of Positioning Reference Signal (PRS) sequences from a cell, wherein each PRS sequence in the plurality of received PRS sequences is based, in part, on a corresponding function ƒ
(PAPh), wherein the corresponding function ƒ
(PAPh) is;added to a seed for a length-31 Gold sequence for a corresponding PRS sequence, and based on a PAP ID (h) of a corresponding physical transmitting antenna element in the cell. - View Dependent Claims (61, 62)
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63. A mobile station comprising:
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a transceiver configured to; receive a plurality of Positioning Reference Signal (PRS) sequences from a cell, wherein each PRS sequence in the plurality of received PRS sequences is based, in part, on a corresponding function ƒ
(PAPh), wherein the corresponding function ƒ
(PAPh) is;added to a seed for a length-31 Gold sequence for a corresponding PRS sequence, and based on a PAP ID (h) of a corresponding physical transmitting antenna element in the cell; and a processor coupled to the transceiver, wherein the processor is configured to; initiate transmission, by the transceiver, of capability information, indicating a capability to generate replica PRS sequences replicating the plurality of PRS sequences. - View Dependent Claims (64, 65)
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66. An apparatus comprising:
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means for receiving a plurality of Positioning Reference Signal (PRS) sequences from a cell, wherein each PRS sequence in the plurality of received PRS sequences is based, in part, on a corresponding function ƒ
(PAPh), wherein the corresponding function ƒ
(PAPh) is;added to a seed for a length-31 Gold sequence for a corresponding PRS sequence, and based on a PAP ID (h) of a corresponding physical transmitting antenna element in the cell; and processing means, the processing means to initiate transmission of capability information indicating a capability to generate PRS sequences replicating one or more of the received PRS sequences. - View Dependent Claims (67)
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68. A non-transitory computer-readable medium containing executable program instructions which cause a processor to:
receiving a plurality of Positioning Reference Signal (PRS) sequences from a cell, wherein each PRS sequence in the plurality of received PRS sequences is based, in part, on a corresponding function ƒ
(PAPh), wherein the corresponding function ƒ
(PAPh) is;added to a seed for a length-31 Gold sequence for a corresponding PRS sequence, and based on a PAP ID (h) of a corresponding physical transmitting antenna element in the cell. - View Dependent Claims (69)
Specification