Optimized observed time difference of arrival (OTDOA) in licensed-assisted access (LAA)
First Claim
1. A method for assisting a position determination of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
- performing, by the UE, a radio resource control (RRC) connection establishment procedure on a primary cell operating in licensed spectrum;
receiving, at the UE, positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined with the primary cell using carrier aggregation;
measuring, by the UE at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations;
measuring, by the UE at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and
sending, by the UE, the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server.
1 Assignment
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Accused Products
Abstract
Disclosed are techniques for determining a location of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum. In an aspect, the UE receives a unique or distinct positioning reference signal (PRS) configuration for each of a plurality of secondary cells, where each PRS configuration includes a common set of positioning occasions and where the plurality of secondary cells are in contention for the common set of positioning occasions. The UE attempts to measure a PRS for each of the PRS configurations in each positioning occasion and typically measures a PRS for just one PRS configuration in each positioning occasion due to the contention for positioning occasions. The UE reports the PRS measurements and the identities of the measured PRS configurations to a location server which uses the reported data to determine a location for the UE.
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Citations
40 Claims
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1. A method for assisting a position determination of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
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performing, by the UE, a radio resource control (RRC) connection establishment procedure on a primary cell operating in licensed spectrum; receiving, at the UE, positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined with the primary cell using carrier aggregation; measuring, by the UE at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; measuring, by the UE at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and sending, by the UE, the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method at a location server for determining a position of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
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sending, by the location server, positioning assistance data to the UE, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined at the UE, using carrier aggregation, with a primary cell operating in licensed spectrum on which the UE performed a radio resource control (RRC) connection establishment procedure; receiving, at the location server from the UE, a first measurement of a first PRS for a first PRS configuration of the plurality of PRS configurations, a second measurement of a second PRS for a second PRS configuration of the plurality of PRS configurations, an identification of the first PRS configuration, and an identification of the second PRS configuration, wherein the first PRS is transmitted by a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells at a first positioning occasion of the common set of positioning occasions, and wherein the second PRS is transmitted by a second eNB for a second secondary cell of the plurality of secondary cells at a second positioning occasion of the common set of positioning occasions; and determining, by the location server, the position of the UE based at least in part on the first measurement, the second measurement, the identification of the first PRS configuration, the identification of the second PRS configuration, a location of the first eNB and a location of the second eNB. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for assisting a position determination of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
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a transceiver of the UE configured to; perform a radio resource control (RRC) connection establishment procedure on a primary cell operating in licensed spectrum; receive positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined with the primary cell using carrier aggregation; and at least one processor of the UE configured to; measure, at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; measure, at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and cause the transceiver to send the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. An apparatus for determining a position of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
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a communication device of a location server configured to; send positioning assistance data to the UE, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined at the UE, using carrier aggregation, with a primary cell operating in licensed spectrum on which the UE performed a radio resource control (RRC) connection establishment procedure; and receive, from the UE, a first measurement of a first PRS for a first PRS configuration of the plurality of PRS configurations, a second measurement of a second PRS for a second PRS configuration of the plurality of PRS configurations, an identification of the first PRS configuration, and an identification of the second PRS configuration, wherein the first PRS is transmitted by a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells at a first positioning occasion of the common set of positioning occasions, and wherein the second PRS is transmitted by a second eNB for a second secondary cell of the plurality of secondary cells at a second positioning occasion of the common set of positioning occasions; and at least one processor of the location server configured to; determine the position of the UE based at least in part on the first measurement, the second measurement, the identification of the first PRS configuration, the identification of the second PRS configuration, a location of the first eNB, and a location of the second eNB. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. A user equipment (UE) apparatus for assisting a position determination of a UE communicating over a shared communication medium in unlicensed spectrum, comprising:
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means for performing a radio resource control (RRC) connection establishment procedure on a primary cell operating in licensed spectrum; means for receiving positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined with the primary cell using carrier aggregation; means for measuring, at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; means for measuring, at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and means for sending the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server.
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38. A location server apparatus for determining a position of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, comprising:
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means for sending positioning assistance data to the UE, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined at the UE, using carrier aggregation, with a primary cell operating in licensed spectrum on which the UE performed a radio resource control (RRC) connection establishment procedure; means for receiving, from the UE, a first measurement of a first PRS for a first PRS configuration of the plurality of PRS configurations, a second measurement of a second PRS for a second PRS configuration of the plurality of PRS configurations, an identification of the first PRS configuration, and an identification of the second PRS configuration, wherein the first PRS is transmitted by a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells at a first positioning occasion of the common set of positioning occasions, and wherein the second PRS is transmitted by a second eNB for a second secondary cell of the plurality of secondary cells at a second positioning occasion of the common set of positioning occasions; and means for determining the position of the UE based at least in part on the first measurement, the second measurement, the identification of the first PRS configuration, the identification of the second PRS configuration, a location of the first eNB, and a location of the second eNB.
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39. A non-transitory computer-readable medium storing computer-executable instructions for assisting a position determination of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, the computer-executable instructions comprising:
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at least one instruction instructing the UE to perform a radio resource control (RRC) connection establishment procedure on a primary cell operating in licensed spectrum; at least one instruction instructing the UE to receive positioning assistance data, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined with the primary cell using carrier aggregation; at least one instruction instructing the UE to measure, at a first positioning occasion of the common set of positioning occasions, a first PRS from a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells, wherein the first eNB transmits the first PRS on the shared communication medium, and wherein the first PRS is configured according to a first PRS configuration of the plurality of PRS configurations; at least one instruction instructing the UE to measure, at a second positioning occasion of the common set of positioning occasions, a second PRS from a second eNB for a second secondary cell of the plurality of secondary cells, wherein the second eNB transmits the second PRS on the shared communication medium, and wherein the second PRS is configured according to a second PRS configuration of the plurality of PRS configurations; and at least one instruction instructing the UE to send the measurement of the first PRS, the measurement of the second PRS, an identification of the first PRS configuration, and an identification of the second PRS configuration to a location server.
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40. A non-transitory computer-readable medium storing computer-executable instructions for determining a position of a user equipment (UE) communicating over a shared communication medium in unlicensed spectrum, the computer-executable instructions comprising:
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at least one instruction instructing a location server to send positioning assistance data to the UE, the positioning assistance data comprising a plurality of positioning reference signal (PRS) configurations for a plurality of secondary cells having overlapping coverage areas, each of the plurality of secondary cells having a different PRS configuration of the plurality of PRS configurations, wherein each PRS configuration of the plurality of PRS configurations includes a common set of positioning occasions, wherein the plurality of secondary cells are in contention for the common set of positioning occasions, and wherein the plurality of secondary cells are combined at the UE, using carrier aggregation, with a primary cell operating in licensed spectrum on which the UE performed a radio resource control (RRC) connection establishment procedure; at least one instruction instructing the location server to receive, from the UE, a first measurement of a first PRS for a first PRS configuration of the plurality of PRS configurations, a second measurement of a second PRS for a second PRS configuration of the plurality of PRS configurations, an identification of the first PRS configuration, and an identification of the second PRS configuration, wherein the first PRS is transmitted by a first evolved NodeB (eNB) for a first secondary cell of the plurality of secondary cells at a first positioning occasion of the common set of positioning occasions, and wherein the second PRS is transmitted by a second eNB for a second secondary cell of the plurality of secondary cells at a second positioning occasion of the common set of positioning occasions; and at least one instruction instructing the location server to determine the position of the UE based at least in part on the first measurement, the second measurement, the identification of the first PRS configuration, the identification of the second PRS configuration, a location of the first eNB, and a location of the second eNB.
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Specification