WO2020069314A1 - Amélioration de mesures de rstd (différence temporelle entre signaux de référence) inter-rat (technologies d'accès radio) - Google Patents

Amélioration de mesures de rstd (différence temporelle entre signaux de référence) inter-rat (technologies d'accès radio) Download PDF

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Publication number
WO2020069314A1
WO2020069314A1 PCT/US2019/053454 US2019053454W WO2020069314A1 WO 2020069314 A1 WO2020069314 A1 WO 2020069314A1 US 2019053454 W US2019053454 W US 2019053454W WO 2020069314 A1 WO2020069314 A1 WO 2020069314A1
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WIPO (PCT)
Prior art keywords
cell
target cell
offset
serving cell
serving
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PCT/US2019/053454
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English (en)
Inventor
Qiming Li
Jie Cui
Yang Tang
Hua Li
Rui Huang
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Intel Corporation
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Application filed by Intel Corporation filed Critical Intel Corporation
Priority to EP19864891.7A priority Critical patent/EP3857996A4/fr
Publication of WO2020069314A1 publication Critical patent/WO2020069314A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • 5G next generation wireless communication system
  • 5G new radio
  • NR next generation wireless communication system
  • LTE Long Term Evolution
  • RATs Radio Access Technologies
  • FIG. 1 is a block diagram illustrating a system employable at a UE (User Equipment) or BS (Base Station) that facilitates inter-RAT (Radio Access Technology) E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) RSTD (Reference Signal Time Difference) measurement, according to various aspects described herein.
  • UE User Equipment
  • BS Base Station
  • inter-RAT Radio Access Technology
  • E Enhanced
  • UMTS Universal Mobile Telecommunications System
  • RSTD Reference Signal Time Difference
  • FIG. 2 is a diagram illustrating an example method employable by one or more of a UE, a gNB (next generation Node B), or a NR (New Radio) system to perform inter-RAT E-UTRA RSTD measurement, in connection with various aspects discussed herein.
  • FIG. 3 is a diagram illustrating a first example method employable at one or more of a UE, a serving cell, or a NR system that facilitates performing inter-RAT E- UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • FIG. 4 is a flow diagram illustrating a second example method employable at one or more of a UE, a serving cell, or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • FIG. 5 is a flow diagram illustrating a third example method employable at one or more of a UE, a serving cell, or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • FIG. 6 is a flow diagram illustrating a fourth example method employable at one or more of a UE, a serving cell, or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • Embodiments described herein can be implemented into a system using any suitably configured hardware and/or software. In various aspects, embodiments discussed herein can facilitate transmit diversity in connection with power saving signals.
  • FIG. 1 illustrated is a block diagram of a system 100 employable at a UE (User Equipment) (e.g., as system 100i) or a BS (Base Station) (e.g., as system I OO2) that facilitates inter-RAT (Radio Access Technology) E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access)
  • UE User Equipment
  • BS Base Station
  • inter-RAT Radio Access Technology
  • E Enhanced
  • UMTS Universal Mobile Telecommunications System
  • System 100 can include processor(s) 1 10 comprising processing circuitry and associated interface(s) (e.g., a communication interface for communicating with communication circuitry 120, a memory interface for communicating with memory 130, etc.), communication circuitry 120 (e.g., comprising circuitry for wired and/or wireless connection(s), e.g., transmitter circuitry (e.g., associated with one or more transmit chains) and/or receiver circuitry (e.g., associated with one or more receive chains), wherein transmitter circuitry and receiver circuitry can employ common and/or distinct circuit elements, or a combination thereof), and a memory 130 (which can comprise any of a variety of storage mediums and can store instructions and/or data associated with one or more of processor(s) 1 10 or transceiver circuitry 120).
  • processor(s) 1 10 comprising processing circuitry and associated interface(s) (e.g., a communication interface for communicating with communication circuitry 120, a memory interface for communicating with memory 130, etc.), communication circuitry 120 (e.g., comprising
  • system 100 can be included within a user equipment (UE).
  • system 1002 can be included within an E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) Node B (Evolved Node B, eNodeB, or eNB), next generation Node B (gNodeB or gNB) or other base station or TRP (Transmit/Receive Point) in a wireless communications network, wherein processor(s) 1 1 O2,
  • E Enhanced
  • UMTS Universal Mobile Telecommunications System
  • Node B evolved Node B
  • gNodeB or gNB next generation Node B
  • TRP Transmit/Receive Point
  • communication circuitry 1 202, and memory 1302 can be in a single device or can be included in different devices, such as part of a distributed architecture.
  • signaling from a UE to a BS can be generated by processor(s) 1 10i, transmitted by communication circuitry 120i , received by communication circuitry 1 202, and processed by processor(s) 1 1 O2, while signaling from a BS to a UE (e.g., including configuration of a UE) can be generated by processor(s) 1 1 O2, transmitted by communication circuitry 1 202, received by communication circuitry 120i , and processed by processor(s) 1 10i.
  • UE(s) can support inter- RAT (Radio Access Technology) E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) RSTD (Reference Signal Time Difference) measurement.
  • E Enhanced
  • UTRA Universal Mobile Telecommunications System
  • RSTD Reference Signal Time Difference
  • FIG. 2 illustrated is a diagram showing an example method 200 employable by one or more of a UE (e.g., UE 100i), a gNB (e.g., gNB I OO2), or a NR system to perform inter-RAT E-UTRA RSTD measurement, in connection with various aspects discussed herein.
  • the procedure 200 can be performed as follows
  • a UE e.g., UE 100i
  • E-UTRA PRS E-UTRA PRS
  • LPP LTE (Long Term Evolution) Positioning Protocol) signalling
  • processor(s) 1 10 of a gNB I OO2 based on LPP signalling received by communication circuitry 120 of gNB I OO2 from a positioning server
  • transmitted by communication circuitry 120 of gNB I OO2 received by communication circuitry 120 of a UE 100i, and processed by processor(s) 1 10 of UE 100i).
  • the UE can request a measurement gap from a serving NR cell (e.g., from gNB I OO2) for performing the requested E-UTRA RSTD measurement (e.g., via a request generated by processor(s) 1 10 of a UE 100i, transmitted by communication circuitry 120 of UE 100i, received by communication circuitry 120 of a gNB I OO2, and processed by processor(s) 1 10 of gNB I OO2).
  • a serving NR cell e.g., from gNB I OO2
  • processor(s) 1 10 of a UE 100i transmitted by communication circuitry 120 of UE 100i, received by communication circuitry 120 of a gNB I OO2
  • processor(s) 1 10 of gNB I OO2 e.g., via a request generated by processor(s) 1 10 of a UE 100i, transmitted by communication circuitry 120 of UE 100i, received by communication circuitry 120 of a gNB I OO2, and processed by processor(
  • the NR serving cell can configure the UE with the measurement gap accordingly (e.g., via configuration signalling (e.g., LPP signalling) generated by processor(s) 1 10 of a gNB 1002 (based on LPP signalling received by communication circuitry 120 of gNB 10O2 from a positioning server), transmitted by communication circuitry 120 of gNB 10O2, received by communication circuitry 120 of a UE 100i , and processed by processor(s) 1 10 of UE 100i).
  • configuration signalling e.g., LPP signalling
  • the UE can perform the inter-RAT E-UTRA RSTD measurement (e.g., via processor(s) 1 10 and communication circuitry 120 of a UE 100i).
  • the second step, at 240, is problematic.
  • the UE When requesting a measurement gap from the serving NR cell, the UE is to provide the serving cell with the subframe/slot boundary difference between the target cell and the serving cell (e.g., EUTRA-RSTD-lnfo.measPRS-Offset INTEGER (0..39) is used in LTE).
  • EUTRA-RSTD-lnfo.measPRS-Offset INTEGER (0..39) is used in LTE.
  • the UE may not clearly know the exact downlink timing information of the cell to be measured.
  • the SFN (System Frame Number) offset is optionally provided to the UE via LPP signalling, which only has a resolution of 10ms.
  • the UE can request suitable gaps for performing inter-RAT E-UTRAN RSTD measurement.
  • a more accurate offset e.g., subframe/slot offset
  • the UE still cannot determine and use the subframe/slot boundary difference, which has a resolution of 1 ms, to request a measurement gap.
  • Existing NR systems lack a mechanism and/or procedure to ensure UE(s) have offset information of sufficient accuracy (e.g., subframe/slot offset, etc.).
  • Various embodiments can employ one or more sets of techniques discussed herein to facilitate inter-RAT E-UTRA RSTD measurement via providing more accurate offset information to at least one of a UE or a serving cell.
  • an indication mechanism can be employed to provide the timing information of a target cell with finer granularity (than in existing NR systems) to a UE (e.g., UE 100i), for example, a frame boundary between a serving cell (e.g., NR cell, etc.) and the target cell (e.g., LTE cell, etc.) can be signaled to the UE, etc.
  • an indication mechanism can be used to provide the timing information of the target cell with finer granularity to the NR cell, e.g. a frame boundary between the serving (e.g., NR, etc.) cell and target (e.g., LTE) cell can be signaled to the serving (e.g., NR, etc.) cell.
  • a new UE behavior can be employed, wherein the UE, which has already been provided with the SFN offset, can perform cell identification, including PSS/SSS detection, for the target cell by using a gap (e.g., an autonomous gap, etc.).
  • the UE can transmit at least X
  • a new UE behavior can be employed, wherein the UE, which has not yet been provided with a SFN offset, can perform cell identification, including PSS/SSS detection and MIB reading for the target cell, by using a gap (e.g., an autonomous gap, etc.), and during the cell identification and MIB reading time TMIB, the UE can transmit at least Y ACK/NACKs on the PCell or each of activated SCell(s).
  • some indication mechanism can be used to provide the timing information of target cell with finer granularity to UE, for example, a frame boundary between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell can be signaled.
  • serving e.g., NR, etc.
  • target e.g., LTE, etc.
  • an indication with finer granularity can be signaled in any of a variety of ways, including but not limited to the following three example techniques for facilitating finer granularity indication.
  • various embodiments can indicate (e.g., gNB
  • the offset can be an integer value from, for example, (0...40), with a precision of 1 ms.
  • the offset can have a time span of, for example, (0...40ms).
  • various embodiments can indicate (e.g., gNB embodiments) or receive an indication of (e.g., UE embodiments) the frame boundary difference between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell as an integer value from, for example, (-30720...30719) with a precision of 1 Ts (about 32.6ns).
  • the frame boundary difference can have a time span of, for example, (- 1 ms...1 ms).
  • various embodiments can indicate (e.g., gNB
  • the slot number offset at the transmitter between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell, which corresponds to the number of full slots counted from the beginning of a radio frame of the assistance data reference cell to the beginning of the closest subsequent radio frame of this cell.
  • the offset can be an integer value from, for example, (0...19) with a precision of 0.5ms.
  • the offset can have a time span of, for example, (0...10ms).
  • the indication can be signaled from the positioning server to the UE, for example, via LPP signaling.
  • the UE After receiving this signaling, the UE can be aware of the frame boundary difference between the target (e.g., LTE, etc.) and the serving (e.g., NR, etc.) cell. Therefore, the UE can acquire the measurement gap from the NR serving cell with this offset.
  • the target e.g., LTE, etc.
  • the serving e.g., NR, etc.
  • a flow diagram of a first example method 300 employable at one or more of a UE (e.g., UE 100i), a serving (e.g., NR) cell (e.g., managed by gNB I OO2), or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • a machine-readable medium can store instructions associated with method 300 that, when executed, can cause a UE to perform the acts of method 300.
  • Method 300 can be based on method 200, wherein acts 320, 340, 360, and 380 correspond to acts 220, 240, 260, and 280, respectively, and wherein method 300 can comprise one or more additional acts.
  • method 300 can comprise, at 330, indicating timing information with finer granularity than SFN offset between the serving (e.g., NR) cell and target (e.g., LTE) cell (e.g., via configuration signaling generated by processor(s) 1 10 of a gNB I OO2 (e.g., based on LPP signalling received by communication circuitry 120 of gNB I OO2 from a positioning server), transmitted by communication circuitry 120 of a gNB I OO2, received by communication circuitry 120 of a UE 100i, and processed by processor(s) 1 10 of a UE 100i).
  • the indication of timing information can comprise, for example, any of the examples of the first set of aspects listed herein.
  • the serving (e.g., NR) cell can configure the requested measurement gap with greater precision and accuracy than existing NR systems.
  • method 300 can include one or more other acts described herein in connection with performing inter-RAT E-UTRA RSTD measurements based on timing with finer granularity than SFN offset being configured to a UE.
  • some indication mechanism can be used to provide the timing information of target cell with finer granularity to a serving (e.g., NR, etc.) cell, for example, a frame boundary between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell can be signaled.
  • a serving e.g., NR, etc.
  • target e.g., LTE, etc.
  • an indication with finer granularity can be signaled in any of a variety of ways, including but not limited to the following three example techniques for facilitating finer granularity indication.
  • the offset can be an integer value from, for example, (0...40), with a precision of 1 ms.
  • the offset can have a time span of, for example, (0...40ms).
  • various embodiments can receive an indication of (e.g., gNB embodiments) the frame boundary difference between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell as an integer value from, for example, (- 30720...30719) with a precision of 1 Ts (about 32.6ns).
  • the frame boundary difference can have a time span of, for example, (-1 ms...1 ms).
  • various embodiments can receive an indication of (e.g., gNB embodiments) the slot number offset at the transmitter between the serving (e.g., NR, etc.) cell and target (e.g., LTE, etc.) cell, which corresponds to the number of full slots counted from the beginning of a radio frame of the assistance data reference cell to the beginning of the closest subsequent radio frame of this cell.
  • the offset can be an integer value from, for example, (0...19) with a precision of 0.5ms.
  • the offset can have a time span of, for example, (0...10ms).
  • the indication can be signaled from the positioning server to the serving (e.g., NR, etc.) cell, for example, via LPPa (LTE Positioning Protocol A) signaling.
  • LPPa LTE Positioning Protocol A
  • FIG. 4 illustrated is a flow diagram of a second example method 400 employable at one of a UE (e.g., UE 100i), a serving (e.g., NR) cell (e.g., managed by gNB I OO2), or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • a UE e.g., UE 100i
  • a serving (e.g., NR) cell e.g., managed by gNB I OO2
  • a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • a machine-readable medium can store instructions associated with method 400 that, when executed, can cause a UE to perform the acts of method 400.
  • Method 400 can be based on method 200, wherein acts 420, 440, 460, and 480 correspond to acts 220, 240, 260, and 280, respectively, and wherein method 400 can comprise one or more additional acts.
  • method 400 can comprise, at 430, receiving at a serving (e.g., NR, etc.) cell an indication of timing information with finer granularity than SFN offset (e.g., based on LPP signalling received by communication circuitry 120 of gNB I OO2 from a positioning server) between the serving (e.g., NR) cell and target (e.g., LTE) cell.
  • a serving e.g., NR, etc.
  • the indication of timing information can comprise, for example, any of the examples of the second set of aspects listed herein.
  • the serving (e.g., NR) cell can configure the requested measurement gap with finer granularity (e.g., greater precision and accuracy) than existing NR systems.
  • method 400 can include one or more other acts described herein in connection with performing inter-RAT E-UTRA RSTD
  • a new UE behavior not present in existing NR systems can be employed, wherein the UE (e.g., UE 100i), which has already been provided with the SFN offset, can perform cell identification, including PSS/SSS detection, for the target cell by using some gap (e.g., an autonomous gap, etc.).
  • the UE 100i can transmit at least X ACK/NACKs on the PCell (Primary Cell), on each of the activated SCell(s) (Secondary Cell(s)), or on some combination thereof.
  • the UE 100i can perform PSS & SSS detection/cell search/cell identification in order to acquire the timing of the LTE cell, such that UE 100i can know the exact time location of PRS occasion.
  • the UE 100i can calculate the offset between the serving (e.g., NR) cell and the PRS occasion. Based on this, the UE 100i can request a gap with the calculated offset.
  • the UE 100i can perform PSS & SSS detection/cell search/cell identification by using some gaps, for example autonomous gaps, wherein the serving (e.g., NR) cell is not aware of this.
  • the serving (e.g., NR) cell can schedule the UE 100i as usual.
  • the UE 100i is performing cell identification during autonomous gaps, it is not receiving or transmitting data in the serving (e.g., NR) cell.
  • the UE 100i would lose some ACK/NACK feedback during this period.
  • the UE 100i can transmit at least X ACK/NACKs on the PCell, on each of the activated SCell(s), or some combination thereof.
  • the values X and Z depend on the total time the UE 100i needed to finish the PSS & SSS detection/cell search/cell identification.
  • the preconfigured SFN offset can be signaled from a positioning server via LPP, or from the serving (e.g., NR) cell via higher layer signaling (e.g., RRC, etc.), to the UE.
  • a positioning server via LPP
  • the serving cell e.g., NR
  • higher layer signaling e.g., RRC, etc.
  • a third example method 500 employable at one of a UE (e.g., UE 100i), a serving (e.g., NR) cell (e.g., managed by gNB I OO2), or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • a machine-readable medium can store instructions associated with method 500 that, when executed, can cause a UE to perform the acts of method 500.
  • Method 500 can be based on method 200, wherein acts 520, 540, 560, and 580 correspond to acts 220, 240, 260, and 280, respectively, and wherein method 500 can comprise one or more additional acts.
  • method 500 can comprise, at 530, calculating a timing offset of the target cell PRS from the serving cell based on a configured SFN offset and target cell timing obtained via performing cell identification (e.g., including PSS/SSS detection, etc.) of the target cell.
  • cell identification e.g., including PSS/SSS detection, etc.
  • the serving (e.g., NR) cell can configure the requested measurement gap with greater accuracy than existing NR systems.
  • method 500 can include one or more other acts described herein in connection with performing inter-RAT E-UTRA RSTD
  • target e.g., LTE
  • a new UE behavior not present in existing NR systems can be employed, wherein the UE (e.g., UE 100i), which has not yet been provided with the SFN offset, can perform cell identification, including PSS/SSS detection, for the target cell by using some gap (e.g., an autonomous gap, etc.).
  • the UE 100i can transmit at least Y ACK/NACKs on the PCell (Primary Cell), on each of the activated SCell(s) (Secondary Cell(s)), or on some combination thereof.
  • the fourth set of aspects can apply to scenarios wherein no timing
  • UE 100i can perform the following acts: (1 ) PSS & SSS detection/cell search/cell identification, to get the timing of the target cell; and (2) Decode the PBCH (Physical Broadcast
  • the UE 100i can know the exact time location of the PRS occasion of the target (e.g., LTE) cell. Thus, the UE 100i can calculate the offset between the serving (e.g., NR) cell and the PRS occasion of the target (e.g., LTE) cell. Based on the calculated offset, the UE can request gap with this offset.
  • the serving e.g., NR
  • the PRS occasion of the target e.g., LTE
  • the UE shall perform PSS & SSS detection/cell search/cell identification by using autonomous gaps, which means the NR cell is not aware of this.
  • the NR would schedule the UE as usual. Therefore, when the UE is doing the autonomous gaps, it cannot receive or transmit data in the NR serving cell. Then from network perspective, the UE would lost some ACK/NACK feedback during this period. Assuming the UE shall feedback a total number of [Z] ACK/NACK on the PCell or each of activated SCell(s) during this period if no autonomous gap is enabled, then the UE shall only allow to miss [Z-Y] ACK/NACK transmission when autonomous gap is enabled.
  • the UE shall transmit at least [Y] ACK/NACKs on the PCell or each of activated SCell(s).
  • the value [Y] and [Z] depend on the total time the UE needed to finish the PSS & SSS detection/cell search/cell identification and PBCH decoding.
  • a flow diagram of a fourth example method 600 employable at one of a UE (e.g., UE 100i), a serving (e.g., NR) cell (e.g., managed by gNB I OO2), or a NR system that facilitates performing inter-RAT E-UTRA RSTD measurement based on more accurate timing information than existing systems, according to various aspects discussed herein.
  • a machine-readable medium can store instructions associated with method 600 that, when executed, can cause a UE to perform the acts of method 600.
  • Method 600 can be based on method 200, wherein acts 620, 640, 660, and 680 correspond to acts 220, 240, 260, and 280, respectively, and wherein method 600 can comprise one or more additional acts.
  • method 600 can comprise, at 630, calculating a timing offset of the target cell PRS from the serving cell having finer granularity (e.g., greater precision and accuracy) than the SFN offset based on a SFN offset obtained via PBCH (Physical Broadcast Channel) and target cell timing obtained via performing cell identification (e.g., including PSS/SSS detection, etc.) of the target cell by the UE.
  • PBCH Physical Broadcast Channel
  • cell identification e.g., including PSS/SSS detection, etc.
  • the serving (e.g., NR) cell can configure the requested measurement gap with greater accuracy than existing NR systems.
  • method 600 can include one or more other acts described herein in connection with performing inter-RAT E-UTRA RSTD
  • Examples herein can include subject matter such as a method, means for performing acts or blocks of the method, at least one machine-readable medium including executable instructions that, when performed by a machine (e.g., a processor with memory, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like) cause the machine to perform acts of the method or of an apparatus or system for concurrent communication using multiple communication technologies according to embodiments and examples described.
  • a machine e.g., a processor with memory, an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or the like
  • Example 1 is an apparatus configured to be employed in a UE (User
  • LPP Long Term Evolution (Long Term Evolution) Positioning Protocol
  • PRS Positioning Reference Signal
  • additional signaling that indicates a timing offset of the target cell relative to a serving cell, wherein the target cell employs a different RAT (Radio Access Technology) than the serving cell
  • RAT Radio Access Technology
  • Example 2 comprises the subject matter of any variation of any of example(s)
  • timing information comprises a smallest subframe offset from a beginning of a subframe 0 of SFN (System Frame Number) 0 of the serving cell for measuring PRS positioning occasions of the target cell.
  • SFN System Frame Number
  • Example 3 comprises the subject matter of any variation of any of example(s)
  • the smallest subframe offset is an integer value from 0 to 40 with a precision of 1 ms.
  • Example 4 comprises the subject matter of any variation of any of example(s) 2, wherein the smallest subframe offset has a time span from 0 to 40ms.
  • Example 5 comprises the subject matter of any variation of any of example(s)
  • timing information comprises a frame boundary difference between the target cell and the serving cell.
  • Example 6 comprises the subject matter of any variation of any of example(s) 5, wherein the frame boundary difference is an integer value from -30,720 to 30,719 with a precision of 1 Ts.
  • Example 7 comprises the subject matter of any variation of any of example(s) 5, wherein the frame boundary difference has a time span of -1 ms to 1 ms.
  • Example 8 comprises the subject matter of any variation of any of example(s)
  • timing information comprises a slot number offset at a transmitter between the serving cell and the target cell.
  • Example 9 comprises the subject matter of any variation of any of example(s) 8, wherein the slot number offset is an integer value from 0 to 19 with a precision of 0.5 ms.
  • Example 10 comprises the subject matter of any variation of any of example(s) 8, wherein the slot number offset has a time span of 0 to 10 ms.
  • Example 1 1 comprises the subject matter of any variation of any of example(s) 1 -10, wherein the additional signaling comprises additional LPP signaling.
  • Example 12 comprises the subject matter of any variation of any of example(s) 1 -10, wherein the serving cell is a NR (New Radio) cell and the target cell is an E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) cell.
  • the serving cell is a NR (New Radio) cell
  • the target cell is an E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) cell.
  • E Enhanced
  • UMTS Universal Mobile Telecommunications System
  • Example 13 is an apparatus configured to be employed in a gNB (next generation Node B), comprising: a memory interface; and processing circuitry configured to: process LPPa (LTE (Long Term Evolution) Positioning Protocol A) signaling that indicates a timing offset of the target cell relative to a serving cell, wherein the target cell employs a different RAT (Radio Access Technology) than the serving cell; process a request for a measurement gap from the serving cell; and generate configuration signaling that configures the measurement gap based on the timing offset.
  • LPPa Long Term Evolution
  • Positioning Protocol A LTE (Long Term Evolution) Positioning Protocol A) signaling that indicates a timing offset of the target cell relative to a serving cell, wherein the target cell employs a different RAT (Radio Access Technology) than the serving cell
  • process a request for a measurement gap from the serving cell and generate configuration signaling that configures the measurement gap based on the timing offset.
  • LPPa Long Term Evolution
  • RAT Radio Access Technology
  • Example 14 comprises the subject matter of any variation of any of example(s) 13, wherein the timing information comprises a smallest subframe offset from a beginning of a subframe 0 of SFN (System Frame Number) 0 of the serving cell for measuring PRS positioning occasions of the target cell, wherein the smallest subframe offset is an integer value from 0 to 40 with a precision of 1 ms, and wherein the smallest subframe offset has a time span from 0 to 40ms.
  • SFN System Frame Number
  • Example 15 comprises the subject matter of any variation of any of example(s) 13, wherein the timing information comprises a frame boundary difference between the target cell and the serving cell, wherein the frame boundary difference is an integer value from -30,720 to 30,719 with a precision of 1 Ts, and wherein the frame boundary difference has a time span of -1 ms to 1 ms.
  • Example 16 comprises the subject matter of any variation of any of example(s) Example 13, wherein the timing information comprises a slot number offset at a transmitter between the serving cell and the target cell, wherein the slot number offset is an integer value from 0 to 19 with a precision of 0.5 ms, and wherein the slot number offset has a time span of 0 to 10 ms.
  • Example 17 comprises the subject matter of any variation of any of example(s) 13-16, wherein the serving cell is a NR (New Radio) cell and the target cell is an E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) cell.
  • the serving cell is a NR (New Radio) cell
  • the target cell is an E (Enhanced)-UTRA (UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access) cell.
  • E Enhanced
  • UMTS Universal Mobile Telecommunications System
  • Example 18 is an apparatus configured to be employed in a UE (User
  • LPP Long Term Evolution (Long Term Evolution) Positioning Protocol
  • PRS Positioning Reference Signal
  • RSTD Reference Signal Time Difference
  • Example 19 comprises the subject matter of any variation of any of example(s) 18, wherein the SFN is configured to the UE prior to performing cell identification of the target cell.
  • Example 20 comprises the subject matter of any variation of any of example(s) 18, wherein the processing circuitry is further configured to determine the SFN via decoding a PBCH (Physical Broadcast Channel) of the target cell.
  • PBCH Physical Broadcast Channel
  • Example 21 comprises an apparatus comprising means for executing any of the described operations of examples 1 -20.
  • Example 22 comprises a machine readable medium that stores instructions for execution by a processor to perform any of the described operations of examples 1 - 20.
  • Example 23 comprises an apparatus comprising: a memory interface; and processing circuitry configured to: perform any of the described operations of examples 1 -20.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne des techniques susceptibles de faciliter la mesure de RSTD (différence temporelle entre signaux de référence) d'E-UTRA (accès radio terrestre amélioré d'UMTS (systèmes universels de télécommunications)) inter-RAT (technologies d'accès radio). Un mode de réalisation décrit à titre d'exemple comporte un UE (équipement d'utilisateur) configuré pour traiter une signalisation LPP (protocole de positionnement de LTE (évolution à long terme)) qui configure un ou des PRS (signaux de référence de positionnement) d'une cellule cible; traiter une signalisation supplémentaire qui indique un décalage de synchronisation de la cellule cible par rapport à une cellule de desserte, la cellule cible employant une RAT (technologie d'accès radio) différente de celle de la cellule de desserte; générer une demande d'un intervalle de mesure à partir de la cellule de desserte d'après le décalage de synchronisation; traiter une signalisation de configuration qui configure l'intervalle de mesure; et effectuer une mesure de RSTD (différence temporelle entre signaux de référence) de la cellule cible pendant l'intervalle de mesure.
PCT/US2019/053454 2018-09-28 2019-09-27 Amélioration de mesures de rstd (différence temporelle entre signaux de référence) inter-rat (technologies d'accès radio) WO2020069314A1 (fr)

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US62/738,285 2018-09-28

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