WO2008049274A1 - Procédé et système de localisation basés sur une différence de temps d'arrivée - Google Patents

Procédé et système de localisation basés sur une différence de temps d'arrivée Download PDF

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Publication number
WO2008049274A1
WO2008049274A1 PCT/CN2006/002852 CN2006002852W WO2008049274A1 WO 2008049274 A1 WO2008049274 A1 WO 2008049274A1 CN 2006002852 W CN2006002852 W CN 2006002852W WO 2008049274 A1 WO2008049274 A1 WO 2008049274A1
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WO
WIPO (PCT)
Prior art keywords
measurement
srnc
cell
positioning
channel state
Prior art date
Application number
PCT/CN2006/002852
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English (en)
Chinese (zh)
Inventor
Xueliang Ren
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Huawei Technologies Co., Ltd.
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Application filed by Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/CN2006/002852 priority Critical patent/WO2008049274A1/fr
Publication of WO2008049274A1 publication Critical patent/WO2008049274A1/fr

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    • 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

Definitions

  • the present invention relates to the field of wireless communications, and more particularly to a Time Difference Of Arrival (TDOA) positioning method.
  • TDOA Time Difference Of Arrival
  • OTDOA Observed Time Difference Of Arrival
  • Two reference points in the system namely two base stations, obtain a time difference of arrival (TDOA) of the wireless signal transmission from the two reference points of the mobile station through a series of measurements.
  • This time difference multiplied by the speed of light is the distance between the two reference points of the mobile station. Poor distance.
  • the mathematical meaning of this distance difference is that the possible trajectory of the position of the mobile station is the focus of the two reference points, and the distance difference is a hyperbola of the difference; and if there is another pair of reference points (there may be a reference) Do the same measurement and calculation as the above, then you can get another trajectory hyperbola. Obviously, the intersection of these two hyperbolas is the two-dimensional position coordinates of the mobile station.
  • an appropriate position estimation algorithm for example, two pairs of NODEBs (base stations) forming a hyperbolic intersection can be calculated.
  • Position of the mobile station UE Assuming that NODEB a is used as a reference, according to the pilot phase measurement result provided by the mobile station, the time difference of the downlink pilot signal reception of NODEB b with respect to NODEB a can be obtained, which is recorded as TDOAab, ij ( c*TDOA , c stands for the speed of light), which is the difference of the propagation distance of NODEB to the mobile station.
  • a hyperbola can be obtained from the two NODEBs. Similarly, according to TDOAac, another hyperbola based on NODEB a and NODEB c can be obtained.
  • the two hyperbolic intersections are the location areas of the UE.
  • OTDOA related measurement which includes: 1. SFN-SFN observed time difference Type 2 measurement by the UE.
  • the UE measures downlink pilot signals (CPICH) of different cells belonging to different NODEBs, Obtaining a phase deviation between the downlink pilot signals OTDOA UE ;
  • CPICH downlink pilot signals
  • the SFN-SFN observed time difference measured by the position measuring unit measures the relative time difference RTD of the OTDOA u ; or completes the positioning measurement of the OTDOA LMU by the UTRAN cell frame timing. In addition, only the mobile station's observation time difference between the two base stations is insufficient. It is also necessary to know the time difference between the two base stations at the antenna transmission port. According to the 3GPP specifications, it is called the relative time difference RTD. The measurement of the RTD is measured and updated by the position measuring unit LMU.
  • RTD(l,3) c*OTDOA LM u(l,3)-(d3-dl)
  • TDOA( 1 ,2) c*OTDOA UE ( 1 ,2)-RTD( 1 ,2)
  • TDOA(l,3) c*OTDOA UE (l ,3)-RTD(l ,3)
  • V(xl-x) 2 + (yl- y) 2 - V(x3-x) 2 +(y3- y) 2 TDOA(l,3) [6]
  • dl, d2 and d3 Respectively indicate the distance between the base stations 1, 2, and 3 of the LMU distance measurement; the plane rectangular coordinates of the base stations 1, 2, and 3 are (xl, yl), (x2, y2), and (x3, y3), respectively.
  • the rectangular coordinates of the terminal plane are (x, y); RTD and TDOA have unified the arrival time deviation in equivalent distance.
  • the more the number of base stations measured by the mobile station the higher the measurement accuracy, and the more obvious the positioning performance is improved. It is better that the NODEB balances around the UE.
  • the DPCH dedicated physical channel
  • the SFN cell frame number of the target cells
  • the SFN-CFN observed time difference measurements comprising a frame offset and code offset measurements OFF T m measurements
  • the service radio network controller SR C
  • the SRNC can add or create new ones according to the timing relationship, frame offset (Frame Offset) and chip offset (Chip Offset).
  • the radio frame synchronization process in FDD mode is used to ensure that the terminal obtains the correct data frame from several cells.
  • SFN-CFN observed time difference The deviation between the SFN of the Common Pilot Channel (CPICH) and the current L2 Transport Channel CFN, according to the 3GPP TS 25.215 protocol, is defined as: OFF * 38400 + T m .
  • T m and OFF values are defined as follows:
  • Tm (TUETX - T 0 ) - TRXSFN [7]
  • the unit is chip (chip), and the value range is 0 ⁇ 38399.
  • T UETx indicates a time when the UE transmits an uplink DPCCH (Dedicated Physical Control Channel) / DPDCH (Dedicated Physical Data Channel) frame;
  • DPCCH Dedicated Physical Control Channel
  • DPDCH Dedicated Physical Data Channel
  • T. indicates a constant time offset value of the first DPCH signal finger peak (DL DPCH n . m ) and T UETx , which is a constant value of 1024 chips;
  • TRXSFN the most recent start time of the received neighbor cell PCCPCH (Primary Common Control Physical Channel) frame before the fixed value (T UETX -T Q );
  • CFNTX the L2 frame number of the UE UE transmitting the uplink DPCCH/DPDCH frame time T UETX ;
  • SFN the SFN frame number obtained by receiving the TRCCSFN at the PCCPCH frame time of the neighboring cell;
  • T m the time difference between a SFN start time and a UE (T UETX - TQ) carried by the target cell primary common control physical channel measured by the UE under the dedicated channel ( CELL_DCH ), which is in the range of 0 to 38399,
  • the unit is chip, that is, the deviation from the SFN within one frame;
  • the network provides the positioning method (such as deploying a positioning measurement unit network and providing SFN-SFN observed time difference measurement or timing measurement between SFNs of each cell can be completed by UTRAN GPS cell frame timing)
  • the positioning method such as deploying a positioning measurement unit network and providing SFN-SFN observed time difference measurement or timing measurement between SFNs of each cell can be completed by UTRAN GPS cell frame timing
  • it is subject to the ability of the terminal UE to provide OTDOA measurements:
  • the 3GPP TS 25.331 protocol the definition of UE positioning capability, by Support for SFN-SFN Observed time difference type 2
  • the measurement signal is not +1 .
  • the cell indicates that the measurement type is not supported: for example, the most typical RRC connection establishment completion message (RRC CONNECTION SETUP COMPLETE) or UE capability query Obtained in the relevant cell carried in the response message (UE CAPABILITY INFORMATION).
  • the present invention provides a method and system for locating time difference (TDOA), which solves the problem that TDOA positioning cannot be performed when the end user equipment (UE) does not support OTDOA measurement in the prior art.
  • TDOA time difference
  • the method of the invention comprises:
  • the service radio network controller acquires the location capability information of the terminal user equipment UE after receiving the location request message;
  • the SR C instructs the UE to perform measurement on the cells that are designated to belong to different base stations according to the positioning capability information.
  • the UE performs measurement on the cell, and reports the code offset measurement value T m and the frame offset measurement value to the SRNC;
  • the SRNC performs the positioning calculation by using the measured value, and locates the result information.
  • the present invention also provides a time difference difference positioning system, including a serving radio network controller SRNC and a user equipment UE, where the SRNC includes:
  • the first input/output interface module implements the signaling or data interaction between the SRNC and the external device;
  • the positioning capability information acquiring module receives the positioning request and acquires the positioning capability information of the UE;
  • the measuring cell determining module determines the measured cell information and sends a measurement indication message to the UE according to the positioning capability information of the UE acquired by the positioning capability information acquiring module and the channel state currently in which the UE is located;
  • the positioning calculation module receives the code offset measurement value T m and the frame offset measurement value OFF of each measurement cell reported by the UE, performs positioning calculation by using the measured value, and reports the positioning result information;
  • the UE includes:
  • a second input/output interface module for implementing signaling or data interaction between the UE and the outside;
  • the measurement execution module receives the measurement indication message sent by the SRNC, and performs code offset and frame offset measurement on the indicated corresponding cell;
  • the SRNC further includes: a state transition module, configured to determine a channel state currently in which the UE is located, and to migrate the UE from the common channel state to the dedicated channel state when the channel state currently in which the UE is located is a common channel state.
  • a state transition module configured to determine a channel state currently in which the UE is located, and to migrate the UE from the common channel state to the dedicated channel state when the channel state currently in which the UE is located is a common channel state.
  • the invention proposes to adopt the same frequency measurement control or the inter-frequency measurement control in the case that the UE does not provide the OTDOA measurement (requires the UE to have the function of the dual FDD receiver, and can support the non-pressure mode and can perform the inter-frequency measurement) to perform the UE SFN.
  • -CFN observed time difference (observed time difference) measurement complete the measurement cell synchronization information, the SRNC by the measurement report T m and OFF measured value and the location measurement units (LMUs) or NODEB completed RTD measurement, to achieve calculate the TDOA.
  • the method of the invention enables the network to adopt a TDOA positioning method without being limited to the UE capability, thereby completing a higher positioning accuracy requirement.
  • FIG. 1 is a schematic diagram of positioning of an OTDOA method in the prior art
  • FIG. 3 is a schematic structural diagram of a time difference difference positioning system according to an embodiment of the present invention. detailed description
  • Step S11 The SRNC receives a positioning request message, and starts a positioning measurement process.
  • Step S12 The SRNC obtains the positioning capability information of the UE by using an RRC connection setup complete message or a related cell carried in the UE capability query ringer message.
  • Step S13 determining, according to the obtained UE positioning capability information, whether the UE supports the OTDOA measurement, if the UE has the OTDOA measurement capability, step S14 is performed, otherwise, step S15 is performed;
  • Step S14 Perform a normal OTDOA measurement procedure, and send a positioning measurement control, so that the UE performs an SFN-SFN observed time difference type 2 measurement in the same-frequency cell with different NODEBs.
  • Step S15 the SRNC determines the current channel state of the UE, if the UE is in the common channel state, step S16 is performed; if the UE is in the dedicated channel state, the following steps S17, S18 or S19 are performed;
  • Step S16 Perform state transition on the UE, and migrate the UE from the common channel state to the dedicated channel state, and the specific migration method, such as: starting paging to the UE, establishing a radio bearer, or reconfiguring the process, etc.; and selecting according to the capability of the UE itself. Perform the following steps S17, S18 or S19;
  • Step S17 The SRNC sends the same-frequency measurement control to the UE.
  • the same-frequency measurement control does not depend on the capability of the UE. In any case, the same-frequency measurement control can be sent to the UE and the same-frequency is assigned to different NODEBs.
  • the cell reports the cell synchronization indication information, and the process goes to step S20;
  • Step S18 If the UE supports the function of the dual receiver in the FDD (Frequency Division Duplex) mode, and the measurement of the inter-frequency cell can be performed without starting the compression mode, the SRNC can only send the inter-frequency measurement control to the UE, The inter-frequency cell belonging to different NODEBs performs cell synchronization measurement, and the process goes to step S20.
  • Step S19 If the UE supports the function of the dual receiver in the FDD (Frequency Division Duplex) mode, the inter-frequency can be performed without starting the compression mode.
  • the SRNC may simultaneously send the same-frequency measurement control and the inter-frequency measurement control to the UE, instructing the UE to report the synchronization indication information of the same-frequency cell, and report the same-frequency indication information of the inter-frequency cell, and continue to step S20;
  • Step S20 The UE carries the measured values of Tm and OFF and reports them to the SRNC; continue the following steps;
  • Step S21 The SRNC performs positioning calculation according to the measured value, and reports the positioning result information to the upper layer (core network);
  • Step S22 ending the positioning measurement process.
  • step S21 the specific calculation method is as follows:
  • the difference in arrival time between cells (CELL i and CELL j ) can be calculated as follows:
  • the relative time difference between the network side cell i and the cell j RTD(i, j) is calculated in accordance with the definition measurement processing calculation of the OTDOA;
  • SFN toget indicates that the UE receives the primary common control physical channel (PCCPCH) frame SFN value of the cell i to be measured;
  • PCCPCH primary common control physical channel
  • DL DPCH nom indicates the first downlink dedicated physical channel signal finger peak
  • T pi -T P j (((OFF(i)+T m (i)HOFF(j)+T m (j))+(SFN toget (j)-SFN target (i))) MOD 256 [12 ]
  • the physical unit of T m is the chip in the OFF and T m measurement results
  • the physical unit of OFF is the frame
  • the unit of the final TDOA result will be the unit of chip. Therefore, the effective distance is expressed as approximately 78 m (speed of light / chip rate, ie (3.0 * 108 ni / s) I 3.84 M (chip / s) - 78 m). Since TDOA uses a time difference from the other two points to the known exact position, it is comparable to the time difference between the simple point-to-point (introducing the relevant measurement error, the difference in the propagation time of the wireless signal, etc.). Most of the cuts, so the final relative time difference is also better improved.
  • the present invention further provides a time difference difference positioning system, and a schematic structural diagram thereof is shown in FIG. 3, including a serving radio network controller SRNC and a user equipment UE, where the SRNC includes:
  • the first input/output interface module implements the signaling or data interaction between the SRNC and the external device; the positioning capability information acquiring module receives the positioning request and acquires the positioning capability information of the UE; and the measurement cell determining module obtains the module according to the positioning capability information acquiring module. Determining the measured cell information and transmitting the measurement indication message to the UE, where the location capability information of the UE and the channel state currently the UE are located;
  • the positioning calculation module receives the code offset measurement value 1 and the frame offset measurement value OFF of each measurement cell reported by the UE, performs positioning calculation by using the measured value, and reports the positioning result information;
  • the state transition module is configured to determine a channel state in which the UE is currently located, and to migrate the UE from the common channel state to the dedicated channel state when the current channel state of the UE is a common channel state.
  • the UE includes: a second input/output interface module, which implements signaling or data interaction between the UE and the outside;
  • the measurement execution module receives the measurement indication message sent by the SR C, and performs code offset and frame offset measurement on the indicated corresponding cell;

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

Un procédé de localisation basé sur une différence de temps d'arrivée consiste à obtenir par SNRC la capacité de localisation d'un EU après que le SRNC reçoive les informations de demande de localisation, le SRNC demandant à l'EU de mesurer les cellules appartenant à différentes stations de base basées sur la capacité de localisation et sur l'état du canal sur lequel l'EU se trouve actuellement, l'EU mesurant les cellules et rapportant un décalage de puce Tm et un décalage de trame OFF sur le SRNC, le SRNC effectuant un calcul d'emplacement basé sur les résultats mesurés et rapportant le résultat de localisation. L'invention concerne également un système de localisation basé sur la différence de temps d'arrivée. Le procédé selon l'invention permet au réseau procéder à la localisation basée sur la différence de temps d'arrivée (TDOA) sans qu'il soit limité par la capacité de l'UE et permet de répondre à une demande de précision de localisation plus élevée.
PCT/CN2006/002852 2006-10-25 2006-10-25 Procédé et système de localisation basés sur une différence de temps d'arrivée WO2008049274A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011015016A1 (fr) * 2009-08-03 2011-02-10 中兴通讯股份有限公司 Procédé et dispositif d’exécution de services de localisation
CN111405657A (zh) * 2020-04-02 2020-07-10 哈尔滨工程大学 一种基于csi的到达角与到达时间差单接入点定位方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029130A1 (fr) * 1997-12-01 1999-06-10 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de positionnement pour radiotelephone mobile cellulaire
CN1719934A (zh) * 2004-07-09 2006-01-11 北京三星通信技术研究有限公司 在lcr－tdd系统中利用波束成形实施定位增强的方法
CN1829376A (zh) * 2005-03-03 2006-09-06 华为技术有限公司 在更软切换中新建传输链路的方法
CN1859721A (zh) * 2005-04-30 2006-11-08 华为技术有限公司 一种到达时间差定位方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029130A1 (fr) * 1997-12-01 1999-06-10 Telefonaktiebolaget Lm Ericsson (Publ) Systeme et procede de positionnement pour radiotelephone mobile cellulaire
CN1719934A (zh) * 2004-07-09 2006-01-11 北京三星通信技术研究有限公司 在lcr－tdd系统中利用波束成形实施定位增强的方法
CN1829376A (zh) * 2005-03-03 2006-09-06 华为技术有限公司 在更软切换中新建传输链路的方法
CN1859721A (zh) * 2005-04-30 2006-11-08 华为技术有限公司 一种到达时间差定位方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011015016A1 (fr) * 2009-08-03 2011-02-10 中兴通讯股份有限公司 Procédé et dispositif d’exécution de services de localisation
CN111405657A (zh) * 2020-04-02 2020-07-10 哈尔滨工程大学 一种基于csi的到达角与到达时间差单接入点定位方法
CN111405657B (zh) * 2020-04-02 2021-01-05 哈尔滨工程大学 一种基于csi的到达角与到达时间差单接入点定位方法

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