WO2021007903A1 - Algorithme de positionnement d'équipement utilisateur pour des essais d'informations d'état de canal et de performance dans une onde millimétrique - Google Patents

Algorithme de positionnement d'équipement utilisateur pour des essais d'informations d'état de canal et de performance dans une onde millimétrique Download PDF

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Publication number
WO2021007903A1
WO2021007903A1 PCT/CN2019/100994 CN2019100994W WO2021007903A1 WO 2021007903 A1 WO2021007903 A1 WO 2021007903A1 CN 2019100994 W CN2019100994 W CN 2019100994W WO 2021007903 A1 WO2021007903 A1 WO 2021007903A1
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Prior art keywords
rsrp
grid point
equally spaced
grid
points
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PCT/CN2019/100994
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English (en)
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Fernando ALONSO MACIAS
Ashwin Mohan
Pradeep SAGANE GOWDA
Shahabuddin MOHAMMAD
Vijay Balasubramanian
Bin Han
Valentin Alexandru Gheorghiu
Muhammad Nazmul ISLAM
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Qualcomm Incorporated
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Publication of WO2021007903A1 publication Critical patent/WO2021007903A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205—Details

Definitions

  • aspects of this disclosure relate generally to wireless communications and the like.
  • Wireless communication systems have developed through various generations, including a first-generation analog wireless phone service (1G) , a second-generation (2G) digital wireless phone service (including interim 2.5G networks) , a third-generation (3G) high speed data, Internet-capable wireless service, and a fourth-generation (4G) service (e.g., Long-Term Evolution (LTE) , WiMax) .
  • 1G first-generation analog wireless phone service
  • 2G second-generation
  • 3G third-generation
  • 4G fourth-generation
  • LTE Long-Term Evolution
  • WiMax Worldwide Interoperability for Microwave Access
  • Examples of known cellular systems include the cellular Analog Advanced Mobile Phone System (AMPS) , and digital cellular systems based on code division multiple access (CDMA) , frequency division multiple access (FDMA) , time division multiple access (TDMA) , the Global System for Mobile access (GSM) variation of TDMA, etc.
  • AMPS cellular Analog Advanced Mobile Phone System
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • GSM Global System for Mobile access
  • a fifth generation (5G) mobile standard calls for higher data transfer speeds, greater numbers of connections, and better coverage, among other improvements.
  • the 5G standard also referred to as “New Radio” or “NR”
  • NR Next Generation Mobile Networks Alliance
  • NR Next Generation Mobile Networks Alliance
  • 5G mobile communications should be significantly enhanced compared to the current 4G /LTE standard.
  • signaling efficiencies should be enhanced and latency should be substantially reduced compared to current standards.
  • two approaches of a method for determining a position of a user equipment (UE) in a test chamber are described: the first approach (BLER-based) and the second approach (RI-plus-RSRP-B-based) .
  • Both approaches include performing a coarse loop comprising: rotating a position of the UE through a first plurality of equally spaced grid points; determining, at each grid point of the first plurality of equally spaced grid points, whether the reference signal received power-branch (RSRP-B) , comprising of both horizontal RSRP (RSRP-H) and vertical RSRP (RSRP-V) for the grid point are greater than the RSRP set by the test equipment; and, based on both the RSRP-B of the grid point being greater than the RSRP set by the test equipment, on a first approach, recording the block error ratio (BLER) for the grid point, selecting a grid point of the first plurality of equally spaced grid points having the lowest BLER and performing a fine loop; on a second approach, if the
  • the fine loop comprising on: rotating the position of the UE through a second plurality of equally spaced grid points, wherein the second plurality of equally spaced grid points are points within a closest vicinity of the grid point having, for the first approach the lowest BLER, and for the second approach the highest RSRP-B; determining, at each grid point of the second plurality of equally spaced grid points, whether the grid point passes a second validity check, wherein the second validity check comprises a determination of whether the horizontal RSRP and the vertical RSRP are greater than the RSRP set by the test equipment and, for the first approach, whether the BLER measured for the grid point is lower than a threshold; for the second approach whether the RI is greater than or equal to the number of layers (L) for positioning, and based on the grid point passing the second validity check, for the first approach, selecting this point as positioning point; for the second approach, recording the RSRP-B for the grid point, and once all grid points of the second plurality of equally spaced grid points have been measured, selecting the grid point of the
  • the initial plurality of equally spaced grid points can be selected using a measurement grid covering the entire sphere or can be selected covering a reduced measurement grid if the tester has prior knowledge of the location of the UE’s antenna array, for which no coarse loop is required to be performed.
  • FIG. 1 illustrates an exemplary architecture of a transceiver, according to aspects of the disclosure.
  • FIG. 2 is a diagram of a simplified high-level method of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 3 is a diagram of the initial procedure of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 4A is a diagram of the coarse loop, for the first approach, of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 4B is a diagram of the coarse loop, for the second approach, of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 5 illustrates an exemplary coarse point set, according to aspects of the disclosure.
  • FIG. 6A is a diagram of the fine loop, for the first approach, of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 6B is a diagram of the fine loop, for the second approach, of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 7 illustrates an exemplary point set, according to aspects of the disclosure.
  • FIGS. 8A and 8B illustrate exemplary methods of wireless communication, according to aspects of the disclosure.
  • FIGS. 9A and 9B illustrate exemplary methods of wireless communication, according to aspects of the disclosure.
  • FIG. 10 is a diagram of a UE within a coordinate sphere, according to aspects of the disclosure.
  • various aspects may be described in terms of sequences of actions to be performed by, for example, elements of a user equipment (UE) testing device or the UE itself.
  • UE user equipment
  • Those skilled in the art will recognize that various actions described herein can be performed by specific circuits (e.g., an application specific integrated circuit (ASIC) ) , by program instructions being executed by one or more processors, or by a combination of both.
  • ASIC application specific integrated circuit
  • these sequences of actions described herein can be considered to be embodied entirely within any form of non-transitory computer- readable medium having stored thereon a corresponding set of computer instructions that upon execution would cause an associated processor to perform the functionality described herein.
  • a UE may be any wireless communication device (e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, wearable device (e.g., smartwatch, glasses, augmented reality (AR) /virtual reality (VR) headset, etc. ) , vehicle (e.g., automobile, motorcycle, bicycle, drone, etc. ) , Internet of Things (IoT) device, etc. ) used by a user that communicates over a wireless communications network.
  • wireless communication device e.g., a mobile phone, router, tablet computer, laptop computer, tracking device, wearable device (e.g., smartwatch, glasses, augmented reality (AR) /virtual reality (VR) headset, etc. )
  • vehicle e.g., automobile, motorcycle, bicycle, drone, etc.
  • IoT Internet of Things
  • a UE may be mobile or may (e.g., at certain times) be stationary, and may communicate with a radio access network (RAN) .
  • RAN radio access network
  • the term “UE” may be referred to interchangeably as an “access terminal” (AT) , a “client device, ” a “wireless device, ” a “subscriber device, ” a “subscriber terminal, ” a “subscriber station, ” a “user terminal” (UT) , a “mobile terminal, ” a “mobile station, ” and variations thereof.
  • AT access terminal
  • client device a “wireless device
  • UT user terminal
  • UEs can communicate with a core network via a RAN, and through the core network the UEs can be connected with external networks such as the Internet and with other UEs.
  • WLAN wireless
  • a base station may operate according to one or more of several RATs in communication with UEs depending on the network in which it is deployed, and may be alternatively referred to as an access point (AP) , a network node/entity, a NodeB, an evolved NodeB (eNB) , a New Radio (NR) Node B, a gNodeB (gNB) , etc.
  • AP access point
  • eNB evolved NodeB
  • NR New Radio
  • gNodeB gNodeB
  • a base station may provide purely edge node signaling functions while in other systems it may provide additional control and/or network management functions.
  • a communication link through which UEs can send signals to a base station is called an uplink (UL) channel (also referred to as a reverse traffic channel, a reverse control channel, an access channel, and the like) .
  • UL uplink
  • a communication link through which the base station can send signals to UEs is called a downlink (DL) or forward link channel (also referred to as a paging channel, a control channel, a broadcast channel, a forward traffic channel, and the like) .
  • DL downlink
  • forward link channel also referred to as a paging channel, a control channel, a broadcast channel, a forward traffic channel, and the like
  • traffic channel can refer to either an UL /reverse or DL /forward traffic channel.
  • base station may refer to a single physical transmission point or to multiple physical transmission points that may or may not be co-located.
  • the physical transmission point may be an antenna of the base station corresponding to a cell of the base station.
  • the physical transmission points may be an array of antennas (e.g., as in a multiple-input multiple-output (MIMO) system or where the base station employs beamforming) of the base station.
  • MIMO multiple-input multiple-output
  • the physical transmission points may be a distributed antenna system (DAS) (anetwork of spatially separated antennas connected to a common source via a transport medium) or a remote radio head (RRH) (aremote base station connected to a serving base station) .
  • DAS distributed antenna system
  • RRH remote radio head
  • the non-co-located physical transmission points may be the serving base station receiving the measurement report from the UE and a neighbor base station whose reference RF signals the UE is measuring.
  • FIG. 1 illustrates an exemplary architecture of a transceiver 100, according to aspects of the disclosure.
  • the transceiver 100 may be coupled to first and second antennas 102 and 104.
  • the transceiver 100 includes receiver circuitry 140 and transmitter circuitry 150.
  • the receiver circuitry 140 is capable of implementing receiver diversity.
  • the receiver circuitry 140 includes two radios 110 and 122 coupled to the two antennas 102 and 104, respectively. Note that although FIG. 1 illustrates only two antennas 102 and 104 and two radios 110 and 122, as will be appreciated, there may be more than two antennas and two radios.
  • a transceiver (e.g., transceiver 100) generally includes a modem (e.g., modem 134) and a radio (e.g., radio 110 or 122) .
  • the radio broadly speaking, handles selection and conversion of the radio frequency (RF) signals into the baseband or intermediate frequency and converts the RF signals to the digital domain.
  • the modem is the remainder of the transceiver.
  • radio 110 includes an amplifier 112, a mixer 114 (also referred to as a signal multiplier) for signal down conversion, a frequency synthesizer 116 (also referred to as an oscillator) that provides signals to the mixer 114, a baseband filter (BBF) 118, and an analog-to-digital converter (ADC) 120.
  • radio 122 includes an amplifier 124, a mixer 126, a frequency synthesizer 128, a BBF 130, and an ADC 132.
  • the ADCs 120 and 132 are coupled to the signal combiner /signal selector 136 of the modem 134, which is coupled to the demodulator 138 of the modem 134.
  • the demodulator 138 is coupled to a packet processor 142.
  • the demodulator 138 and the packet processor 142 provide demodulated and processed single or multiple output signals to the communication controller and/or processing system.
  • FIG. 1 illustrates a single modem 134 coupled to two radios 110 and 122, as will be appreciated, each radio 110 and 122 may be coupled to a different modem, and the receiver circuitry 140 would therefore include the same number of radios and modems.
  • An anechoic chamber is a testing device typically having a square or rectangular outer structure surrounding an interior surface that is completely lined with an absorptive material. The absorptive material serves to mitigate any interference signals or reflections generated during testing within the anechoic chamber.
  • Transmitter and receiver tests are defined for LTE in Third Generation Partnership Project (3GPP) Technical Specification (TS) 36.521 and for 5G NR in 3GPP TS 38.521, each of which is publicly available and is incorporated herein in its entirety.
  • 3GPP TS 38.521-2 specifies the measurement procedures for the conformance testing of a UE that contains RF characteristics for frequency range 2 (FR2) as part of the 5G NR.
  • the frequency spectrum in which wireless nodes is divided into multiple frequency ranges, FR1 (from 450 to 6000 MHz) , FR2 (from 24250 to 52600 MHz) , FR3 (above 52600 MHz) , and FR4 (between FR1 and FR2) .
  • FR2 is part of the extremely high frequency (EHF) spectrum.
  • EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in this band may be referred to as a millimeter wave (mmW) .
  • mmW millimeter wave
  • wireless nodes When communicating in mmW, wireless nodes typically utilize beamforming (transmit and/or receive) over a mmW communication link to compensate for the extremely high path loss and short range of RF signals in that frequency range.
  • Transmit beamforming is a technique for focusing an RF signal in a specific direction.
  • a transmitter e.g., a base station
  • transmit beamforming the transmitter determines where a given target device (e.g., a UE) is located (relative to the transmitter) and projects a stronger downlink RF signal in that specific direction, thereby providing a faster (in terms of data rate) and stronger RF signal for the receiving device (s) .
  • the transmitter can control the phase and relative amplitude of the RF signal at each of the one or more transmitters that are broadcasting the RF signal.
  • a transmitter may use an array of antennas (referred to as a “phased array” or an “antenna array” ) that creates a beam of RF waves that can be “steered” to point in different directions, without actually moving the antennas.
  • the RF current from the transmitter is fed to the individual antennas with the correct phase relationship so that the radio waves from the separate antennas add together to increase the radiation in a desired direction, while cancelling to suppress radiation in undesired directions.
  • the receiver uses a receive beam to amplify RF signals detected on a given channel. For example, the receiver can increase the gain setting and/or adjust the phase setting of an array of antennas in a particular direction to amplify (e.g., to increase the gain level of) the RF signals received from that direction.
  • a receiver is said to beamform in a certain direction, it means the beam gain in that direction is high relative to the beam gain along other directions, or the beam gain in that direction is the highest compared to the beam gain in that direction of all other receive beams available to the receiver.
  • RSRP reference signal received power
  • RSRQ reference signal received quality
  • SNR signal-to-noise ratio
  • SINR signal-to-interference-plus-noise ratio
  • the 3GPP RAN4 UE performance specification details downlink Layer-1 (i.e., physical layer) performance and channel state information (CSI) requirements for the UE.
  • Layer-1 i.e., physical layer
  • CSI channel state information
  • the current positioning procedures available in 3GPP technical specification (TS) 38.521-4 Annex H are only a first approach that do not provide much detail, causing several problems. First, they are incomplete. They are unable to handle all possible outcomes during positioning, and some of the branches lead to a dead end. This lack of definition can potentially cause implementation misalignment across multiple TEs, and therefore, cause different outcomes and validation results.
  • BLER block-to-error ratio
  • a “layer” is an aspect of a MIMO system.
  • MIMO is a technique for simultaneously sending and receiving more than one data signal over the same radio channel by exploiting multipath propagation.
  • Each such data signal is referred to as a “layer. ”
  • a UE In mmW systems, a UE is currently expected to support up to two layers, but more may be possible in the future.
  • the present disclosure introduces a new algorithm that optimizes scanning the measurement grid through two loops, significantly reducing the time it takes to properly position the UE for testing.
  • An initial procedure is defined (FIG. 3) followed by two loops: a coarse loop (FIG. 4A and FIG. 4B) and a fine loop (FIG. 6A and FIG. 6B) .
  • the algorithm uses the measurement grid defined in 3GPP TS 38.521-2 annex M. 1 Figures M. 1-1 and M. 1-2 and is based on the coarse and fine search concept defined in 3GPP TS 38.521-2 annex M. 2.2.
  • the present disclosure introduces a new method of evaluating measurement grid points.
  • the proposed method performs an RSRP-B-based validity check to any measured grid point before any additional assessment is done. If this check fails, the point is not further evaluated.
  • the BLER metric for that point is evaluated depending on the loop in which the procedure is. If in the coarse loop (FIG. 4A) , the method sorts the valid measured points based on BLER and feeds that list to the fine loop once all coarse points have been measured. If in the fine loop (FIG. 6A) , if the BLER meets a certain criteria, the method selects the point as the positioning point and terminates the procedure successfully (early termination) .
  • a second validity check based on RI is performed. If both checks are satisfied the method sorts the valid measured points based on RSRP-B and processes them depending on the loop in which the procedure is. If in the coarse loop (FIG. 4B) , the method feeds that list to the fine loop once all the coarse points have been measured. If in the fine loop (FIG. 6B) , the method sequentially performs an isolation procedure followed by a REFSENS procedure (as defined in 3GPP TS 38.521-2, Section 7.3) , on the points from that list until one of them satisfies it, in which the procedure terminates selecting that point.
  • REFSENS procedure as defined in 3GPP TS 38.521-2, Section 7.3
  • the method proceeds with the next fine loop iteration.
  • This method is an optimization to the current approach in the sense that the RSRP-B (RSRP-branch) is now prioritized over any other assessment (i.e., it is used as a validity check) , and on top of this check, either the points are sorted based on the BLER, or a second RI-based validity check is performed, followed by an RSRP-B sorting.
  • This enables the UE positioning to be aligned with performance metrics, and therefore, to be more suitable for performance and CSI testing needs.
  • EIS effective isotropic sensitivity
  • the present disclosure introduces a new mechanism to enable positioning of UEs in the TE for a different number of layers. If the UE can be positioned according to a given number of layers, it is assumed to be a good position for any smaller number of layers. The mechanism will initially attempt to position the UE using the maximum number of supported layers. If the UE cannot be positioned according to its maximum number of supported layers, however, the procedure will attempt to position the UE according to the next lower layer number. This is helpful to at least enable testing of performance/CSI tests that require a lower number of layers.
  • the present disclosure introduces a new mechanism to dynamically select the modulation and coding scheme (MCS) to be scheduled according to the UE-reported number of layers and the maximum SNR the TE can deliver to the UE.
  • MCS modulation and coding scheme
  • MCS are used to determine the data rate of a wireless connection using high-throughput orthogonal frequency division multiplexing (HT-OFDM) . If the UE does not support a given number of layers, it can signal that using an NR capability report and the TE will dynamically adjust the MCS to be scheduled accordingly. If a TE cannot deliver a sufficient SNR level to schedule a certain MCS, for example MCS 27, it may still be able to do so for a smaller MCS, for example MCS 26.
  • MCS modulation and coding scheme
  • the MCS can be dynamically adjusted to enable UE positioning for this TE. Therefore, it provides sufficient flexibility to position any type of UE using any type of TE. This method is based on 38.101-4 Table 7.5A-4.
  • FIG. 2 is a diagram of a simplified high-level method 200 of the proposed UE positioning techniques, according to aspects of the disclosure.
  • the method 200 includes an initial procedure 300 (FIG. 3) , a coarse loop 400A (FIG. 4A) , and a fine loop 600A (FIG. 6A) ;
  • the method 200 includes an initial procedure 300 (FIG. 3) , a coarse loop 400B (FIG. 4B) , and a fine loop 600B (FIG. 6B) .
  • FIG. 3 is a diagram of the initial procedure 300 of the proposed UE positioning techniques, according to aspects of the disclosure.
  • the UE is assumed to be initially placed in an arbitrary position. Therefore, at 304, the positioner needs to start the algorithm on a known initial position.
  • Azimuth (0) and Elevation (0) can be set as default (0°, 0°) or as user input, in case the tester has some prior information about the location of the antenna arrays in the UE.
  • the UE attaches to the LTE network.
  • the NR PSCell is now added as part of the UE positioning algorithm. Note that the attachments to an LTE and NR network is exemplary, and could instead be to an LTE network only, a NR network only, or to some other mix of networks.
  • the UE is rotated according to both of which can be set to a default value or left for user input. If, at 310, the NR PSCell can be added, then at 314, the UE is configured to periodically (e.g., every 240 ms) report the RSRP-B and the RI for the PSCell.
  • the UE is initially positioned according to the maximum number of layers it supports.
  • the TE conducting the positioning extracts the maximum number of layers supported by the UE using the reported NR capability report.
  • this number is reduced to the immediate lower number and the positioning is re-attempted.
  • the number of layers L ⁇ 1, 2, 4, etc. ⁇ . L is assumed to always be a power of 2, so a reduction to the immediately lower number is an identical operation as dividing L by 2.
  • the initial number of layers, L can also be manually set by the tester.
  • the FLAG_RSRP-B is initialized to 0. This flag will be useful if the UE cannot be positioned at the end of the fine loop (FIG. 6A and FIG. 6B) .
  • the UE is scheduled downlink MAC padding according to the selected number of layers and using the maximum possible MCS the TE can set, according to 3GPP TS 38.101-4 Table 7.5A-4.
  • 3GPP RAN4 has established the minimum SNR required to guarantee at least 85%peak throughput for a given number of layers and MCS. Depending on what SNR level the TE can set, it will select the MCS accordingly. It is important to notice that the maximum SNR available to the UE inside the mmW anechoic chamber is dependent on the TE implementation and the proposed procedure aims to be valid for any TE.
  • the TE sets the maximum DL power according to its capabilities. Additionally, the TE needs to have knowledge on what the maximum SNR is that it can deliver to the UE (based on its link budget analysis, including MAX DL power, path loss, and other parameters) . At 326, using this maximum SNR, the TE looks up, in Table 7.5A-4, the corresponding MCS to be scheduled.
  • the reference measurement channel is the combination of layers and MCS determined to be used for the positioning.
  • FIG. 4A is a diagram of the coarse loop 400A for the first approach of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 4B is a diagram of the coarse loop 400B for the second approach of the proposed UE positioning techniques, according to aspects of the disclosure.
  • like reference numbers refer to like steps.
  • FIG. 5 illustrates an exemplary coarse point set 500, according to aspects of the disclosure, in which the coarse point set 500 is composed of grid points spaced 60° both in Azimuth ( ⁇ ) and in for a total of 18 points:
  • each point in the coarse point set 500 is sampled for three seconds (equal to 24,000 slots for a subcarrier spacing (SCS) of 120 kHz) , which is a sufficient sample set for a static channel scenario.
  • SCS subcarrier spacing
  • RSRP-B is configured to be reported with a periodicity of 240 ms, meaning about 12 measurement reports will be expected in the three second sampling time. Again, this should be sufficiently representative for a static channel.
  • RI is configured to be periodically reported during the sampling time.
  • the measured BLER on that point is recorded in the positioner database at 406 and 408; for the second approach, an RI check at 422 is also performed.
  • the RI check ensures that the reported RI is greater than or equal to L, where L is the number of layers targeted for positioning. If this RI check is satisfied, the measured RSRP-B is recorded in the positioner database at 424 and 408.
  • the grid point is said to be a valid point if it satisfies the following RSRP-B criteria, namely, each of the horizontal RSRP (RSRP-H) and the vertical RSRP (RSRP-V) are greater than the RSRP set by the test equipment:
  • the UE is rotated to the next coarse point and the loop repeats.
  • all valid points are sorted (414) in terms of BLER for the selected RMC and passed to the fine loop (FIG. 6A) for further processing; for the second approach, all valid points are sorted (426) in terms of RSRP-B and passed to the fine loop (FIG. 6B) for further processing . If there is not a single valid point from the coarse point set 500, the UE positioning algorithm will terminate indicating that the UE cannot be positioned (416) .
  • the output of the coarse loop 400A/400B is a sorted coarse list of valid points based on the BLER metric for the first approach; and based on the RSRP-B metric for the second approach.
  • FIG. 6A is a diagram of the fine loop 600A for the first approach of the proposed UE positioning techniques, according to aspects of the disclosure.
  • FIG. 6B is a diagram of the fine loop 600B for the second approach of the proposed UE positioning techniques, according to aspects of the disclosure.
  • like reference numbers refer to like steps.
  • the fine loop 600A/600B takes as input a sorted list of valid points from the coarse loop 400A/400B and selects the next best point of it as the “coarse lead point. ”
  • the coarse lead point is determined, for the first approach (602) , as the point in the sorted list with lowest BLER; for the second approach (928) , as the point in the sorted list with highest RSRP-B.
  • the set of points in its closest vicinity is determined. Specifically, points in the measurement grid are equi-spaced 15° both in Azimuth and Elevation. A point is said to be in closest vicinity from the coarse lead point if there is no other coarse point closer to it than the coarse lead point. Each coarse lead point has 24 points in closest vicinity.
  • the positioner database will be updated with this information (606) .
  • the positioner is initialized at 604.
  • the fine loop iterator will sequentially scan each point in closest vicinity of the coarse lead point one-by-one.
  • RSRP-B is configured to be reported with a periodicity of 240 ms, so about 12 measurement reports will be expected in the three second sampling time. Again this should be sufficiently representative for a static channel.
  • RI is configured to be periodically reported during the sampling time.
  • an RSRP-B validity criteria will be conducted. Again, a grid point is said to be a valid point if it satisfies the RSRP-B criteria:
  • FLAG_RSRP-B is set to 1 (614) to indicate that at least one point was able to satisfy the RSRP-B check.
  • the BLER measurement will be evaluated.
  • a point is said to be eligible if the following criteria are satisfied.
  • the RSRP-B validity criteria is satisfied (612)
  • the BLER measurement is evaluated to be less than, for example, 15% (616) .
  • the fine loop 600A finds a point satisfying this criteria, such point is determined to be the positioning point and the algorithm will terminate returning the Azimuth and Elevation coordinates (early termination) at 618.
  • the TE can now proceed to lock the UE positioning and start conducting performance and CSI tests. Otherwise, if there are points remaining at 620, then at 622 and 624, the UE is rotated to the next closest point and the loop repeats.
  • an RI check at 916 is also performed.
  • the RI check ensures that the reported RI is greater than or equal to L, where L is the number of layers targeted for positioning. If this RI check is satisfied, the measured RSRP-B is recorded in the positioner database at 918.
  • the points are sorted based on their RSRP-B and an isolation procedure is performed at 924.
  • the isolation procedure performs the following operations:
  • the isolation procedure is terminated and a REFSENS procedure (as defined in 3GPP TS 38.521-2, Section 7.3) is performed on this position If the REFSENS procedure at 930 passes for this position the position is selected as the final UE position for the tests at 926. Otherwise, if either the isolation procedure or the REFSENS procedure are not satisfied, the Fine Loop 600B continues to the next Fine Loop iteration (626) . Note that the bracketed values of “ [15] ” in the above equations indicate that 15 dB is an example and the present disclosure is not limited to these values.
  • this coarse lead point is removed from the sorted coarse list at 626. If this was not the last point in the list (628) , the fine loop 600A/600B proceeds to execute for the next best point from the list (for the first approach, the next point with lowest BLER; for the second approach the next point with highest RSRP-B) . In this case, any grid point already measured under another the coarse lead point is removed from the new closest vicinity set. This is needed because there are some grid points at the same distance from multiple closest coarse points, and they do not need to be measured again.
  • the fine loop 600A/600B evaluates FLAG_RSRP-B.
  • the FLAG_RSRP-B is set to 1 to indicate that at least one valid point was found to achieve RSRP-B measurement within bounds, even if other metrics (BLER, RI) on such point were not meeting the criteria. This helps avoid running the procedure for other layers in the extreme case in which the RSRP-B is always too bad to meet the validity criteria in any grid point. Therefore, if the FLAG_RSRP-B is set to 1, it indicates that it is worth re-running the positioning procedure for a smaller number of layers.
  • FIG. 7 illustrates an exemplary point set 700, according to aspects of the disclosure.
  • the coarse points are circled.
  • the coarse lead point is X’d, and the closest vicinity points are boxed.
  • the coarse lead point is
  • FIGS. 8A and 8B illustrate an exemplary method 800 for determining a position of a UE in a test chamber, using the first approach, according to aspects of the disclosure.
  • the method 800 may be performed by a test equipment.
  • the test equipment performs a coarse loop comprising, at 820, rotating a position of the UE through a first plurality of equally spaced grid points, at 830, determining, at each grid point of the first plurality of equally spaced grid points, whether the grid point passes a first validity check, where the first validity check comprises a determination of whether each of the horizontal RSRP (RSRP H ) and the vertical RSRP (RSRP V ) are greater than the RSRP set by the test equipment, and at 840, based on the grid point passing the first validity check, recording a BLER for the grid point.
  • RSRP H horizontal RSRP
  • RSRP V vertical RSRP
  • the test equipment selects a grid point of the first plurality of equally spaced grid points having a lowest BLER.
  • the test equipment performs a fine loop comprising, at 870, rotating the position of the UE through a second plurality of equally spaced grid points, wherein the second plurality of equally spaced grid points are points within a closest vicinity of the grid point having the lowest BLER, at 880, determining, at each grid point of the second plurality of equally spaced grid points, whether the grid point passes a second validity check, wherein the second validity check comprises a determination of whether each of the horizontal RSRP (RSRP H ) and the vertical RSRP (RSRP V ) are greater than the RSRP set by the test equipment, and at 890, based on the grid point passing the second validity check, determining whether a BLER for the grid point is less than a threshold.
  • RSRP H horizontal RSRP
  • RSRP V vertical RSRP
  • FIGS. 9A and 9B illustrate a method 900 for determining a position of a UE in a test chamber, using the second approach, according to aspects of the disclosure.
  • the method 900 may be performed by a test equipment.
  • the test equipment performs a coarse loop comprising, at 920, rotating a position of the UE through a first plurality of equally spaced grid points, determining, at 930, at each grid point of the first plurality of equally spaced grid points, whether each of the horizontal RSRP (RSRP H ) and the vertical RSRP (RSRP V ) are greater than the RSRP set by the test equipment, and based on the grid point passing this validity check, determining whether the RI is greater than or equal to the number of layers (L) for positioning, and, at 940, based on the horizontal RSRP (RSRP H ) and the vertical RSRP (RSRP V ) are greater than the RSRP set by the test equipment as well as the RI is greater than or equal to the number of layers (L) for positioning, recording a RI and the RSRP-B for the grid point.
  • RSRP H horizontal RSRP
  • RSRP V vertical RSRP
  • the test equipment selects a grid point of the first plurality of equally spaced grid points having the highest RSRP-B.
  • the test equipment performs a fine loop comprising, at 970, rotating the position of the UE through a second plurality of equally spaced grid points, wherein the second plurality of equally spaced grid points are points within a closest vicinity of the grid point having the highest RSRP-B, determining, at 980, at each grid point of the second plurality of equally spaced grid points, whether the grid point passes a second validity check, wherein the second validity check comprises a determination of whether each of the horizontal RSRP (RSRP H ) and the vertical RSRP (RSRP V ) are greater than the RSRP set by the test equipment, and whether the RI is greater than or equal to a number of layers supported by the UE, and, at 990, based on the grid point passing the second validity check, recording the RSRP-B for the grid point.
  • RSRP H horizontal RSRP
  • RSRP V vertical RSRP
  • FIG. 10 is a diagram 1000 of a UE 1002 within a coordinate sphere 1010, according to aspects of the disclosure.
  • the UE 1002 is mounted within the test chamber in one of the three alignment options as specified in 3GPP TS 38.810.
  • any reference to an element herein using a designation such as “first, ” “second, ” and so forth does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient method of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements may be employed there or that the first element must precede the second element in some manner. Also, unless stated otherwise a set of elements may comprise one or more elements.
  • terminology of the form “at least one of A, B, or C” or “one or more of A, B, or C” or “at least one of the group consisting of A, B, and C” used in the description or the claims means “Aor B or C or any combination of these elements. ”
  • this terminology may include A, or B, or C, or A and B, or A and C, or A and B and C, or 2A, or 2B, or 2C, and so on.
  • an apparatus or any component of an apparatus may be configured to (or made operable to or adapted to) provide functionality as taught herein. This may be achieved, for example: by manufacturing (e.g., fabricating) the apparatus or component so that it will provide the functionality; by programming the apparatus or component so that it will provide the functionality; or through the use of some other suitable implementation technique.
  • an integrated circuit may be fabricated to provide the requisite functionality.
  • an integrated circuit may be fabricated to support the requisite functionality and then configured (e.g., via programming) to provide the requisite functionality.
  • a processor circuit may execute code to provide the requisite functionality.
  • a software module may reside in random access memory (RAM) , flash memory, read-only memory (ROM) , erasable programmable ROM (EPROM) , electrically erasable programmable ROM (EEPROM) , registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium.
  • the storage medium may be integral to the processor (e.g., cache memory) .
  • aspects of the disclosure can include a computer-readable medium embodying methods for wireless communications, as disclosed herein.

Abstract

L'invention porte, selon un aspect, sur un équipement de test qui réalise une boucle grossière consistant : à faire tourner une position de l'équipement utilisateur à travers une première pluralité de points de grille équidistants, à déterminer, au niveau de chaque point de grille, si le point de grille franchit un premier contrôle de validité et, sur la base du point de grille qui franchit le premier contrôle de validité, à enregistrer à la fois des informations RI et la puissance RSRP-B pour le point de grille, à sélectionner un point de grille ayant la puissance RSRP-B la plus élevée et à réaliser une boucle fine consistant : à faire tourner la position de l'équipement utilisateur à travers une seconde pluralité de points de grille équidistants, la seconde pluralité de points de grille équidistants étant des points à l'intérieur du voisinage le plus proche du point de grille ayant la puissance RSRP-B la plus élevée, à déterminer, au niveau de chaque point de grille de la seconde pluralité de points de grille équidistants, si le point de grille franchit un second contrôle de validité, et, sur la base du point de grille qui franchit le second contrôle de validité, à enregistrer la puissance RSRP-B pour le point de grille, à sélectionner un point de grille de la seconde pluralité de points de grille équidistants ayant la puissance RSRP-B la plus élevée, et à effectuer une procédure d'isolation suivie d'une procédure REFSENS.
PCT/CN2019/100994 2019-07-12 2019-08-16 Algorithme de positionnement d'équipement utilisateur pour des essais d'informations d'état de canal et de performance dans une onde millimétrique WO2021007903A1 (fr)

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US201962873822P 2019-07-12 2019-07-12
US62/873,822 2019-07-12
US201962886933P 2019-08-14 2019-08-14
US62/886,933 2019-08-14

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Citations (4)

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Publication number Priority date Publication date Assignee Title
US20100194743A1 (en) * 2009-02-03 2010-08-05 Michael Glueck Multiscale three-dimensional reference grid
CN108462938A (zh) * 2018-03-09 2018-08-28 深圳市网信联动通信技术股份有限公司 一种基于4/5g移动通信网络定位重叠覆盖区域的方法及系统
CN109392000A (zh) * 2017-08-09 2019-02-26 电信科学技术研究院 一种定位、测量上报方法及装置
CN109952780A (zh) * 2017-06-14 2019-06-28 Oppo广东移动通信有限公司 用于无线通信系统中的无线资源测量的方法和装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100194743A1 (en) * 2009-02-03 2010-08-05 Michael Glueck Multiscale three-dimensional reference grid
CN109952780A (zh) * 2017-06-14 2019-06-28 Oppo广东移动通信有限公司 用于无线通信系统中的无线资源测量的方法和装置
CN109392000A (zh) * 2017-08-09 2019-02-26 电信科学技术研究院 一种定位、测量上报方法及装置
CN108462938A (zh) * 2018-03-09 2018-08-28 深圳市网信联动通信技术股份有限公司 一种基于4/5g移动通信网络定位重叠覆盖区域的方法及系统

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