WO2020191646A1 - Mesure de positionnement sans fil - Google Patents

Mesure de positionnement sans fil Download PDF

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Publication number
WO2020191646A1
WO2020191646A1 PCT/CN2019/079829 CN2019079829W WO2020191646A1 WO 2020191646 A1 WO2020191646 A1 WO 2020191646A1 CN 2019079829 W CN2019079829 W CN 2019079829W WO 2020191646 A1 WO2020191646 A1 WO 2020191646A1
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WO
WIPO (PCT)
Prior art keywords
positioning
measurement window
terminal device
measurement
configuration
Prior art date
Application number
PCT/CN2019/079829
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English (en)
Inventor
Tao Tao
Jianguo Liu
Yan Meng
Gang Shen
Original Assignee
Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to CN201980094745.XA priority Critical patent/CN113632549B/zh
Priority to PCT/CN2019/079829 priority patent/WO2020191646A1/fr
Publication of WO2020191646A1 publication Critical patent/WO2020191646A1/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
    • G01S5/0236—Assistance data, e.g. base station almanac
    • 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
    • G01S5/10—Position of receiver fixed by co-ordinating a plurality of position lines defined by path-difference measurements, e.g. omega or decca systems

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to a method, device, apparatus and computer readable storage medium for wireless positioning measurement.
  • Wireless communications networks are widely deployed and can support various types of service applications for terminal devices. Meanwhile, the location of the terminal device can be identified, such that a large number of commercial and non-commercial location-based services can be achieved. Therefore, the technology of wireless positioning is growing rapidly and has received a great deal of interest.
  • one or more positioning reference devices may transmit positioning reference signals (PRSs) to a terminal device, and the terminal device may perform positioning measurement on the PRSs and provide positioning measurement reports to a location server.
  • PRSs positioning reference signals
  • the location of the terminal device can be derived from the measurement report at the location server.
  • the terminal device may move at a high velocity, which brings great challenges to the current positioning system. Therefore, it is now desirable to provide an efficient positioning mechanism.
  • example embodiments of the present disclosure provide a solution for wireless positioning measurement.
  • a method implemented at a location server comprises obtaining, at a location server, positioning assistance information for positioning a terminal device; generating a configuration of a measurement window at least in part based on the positioning assistance information, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; and sending the configuration of the measurement window to the terminal device.
  • a method implemented at a terminal device comprises receiving, at a terminal device, a configuration of a measurement window from a location server, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; performing a measurement of the positioning reference signal at least in part based on the time window defined by the configuration of the measurement window; and sending a measurement report to the location server.
  • a device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the device to obtain, at a location server, positioning assistance information for positioning a terminal device.
  • the device is also caused to generate a configuration of a measurement window at least in part based on the positioning assistance information, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device.
  • the device is further caused to sending the configuration of the measurement window to the terminal device.
  • a device comprising at least one processor; and at least one memory including computer program codes; the at least one memory and the computer program codes are configured to, with the at least one processor, cause the device to receive, at a terminal device, a configuration of a measurement window from a location server, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device.
  • the device is also caused to perform a measurement of the positioning reference signal at least in part based on the time window defined by the configuration of the measurement window.
  • the device is further caused to send a measurement report to the location server.
  • an apparatus comprising means for obtaining, at a location server, positioning assistance information for positioning a terminal device; means for generating a configuration of a measurement window at least in part based on the positioning assistance information, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; and mean for means for sending the configuration of the measurement window to the terminal device.
  • an apparatus comprising means for receiving, at a terminal device, a configuration of a measurement window from a location server, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; means for performing a measurement of the positioning reference signal at least in part based on the time window defined by the configuration of the measurement window; and means for sending a measurement report to the location server.
  • a non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least the method according to first aspect or the second aspect.
  • Fig. 1 illustrates an example communication network in which example embodiments of the present disclosure may be implemented
  • Fig. 2 illustrates a schematic diagram of interactions among devices according to example embodiments of the present disclosure
  • FIG. 3 illustrates a flowchart of a method implemented at a location server according to some example embodiments of the present disclosure
  • Fig. 4 illustrates a schematic diagram of interactions between devices according to example embodiments of the present disclosure
  • Fig. 5 illustrates a schematic diagram of interactions between devices according to example embodiments of the present disclosure
  • Fig. 6 illustrates a schematic diagram of interactions between devices according to example embodiments of the present disclosure
  • Fig. 7 illustrates a schematic diagram of interactions between devices according to example embodiments of the present disclosure
  • Fig. 8 illustrates a flowchart of a method implemented at a terminal device according to some example embodiments of the present disclosure
  • Fig. 9 illustrates a schematic diagram of an example implementation of the measurement window at the terminal device
  • Fig. 10 illustrates a schematic diagram of another example implementation of the measurement window at the terminal device
  • Fig. 11 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
  • Fig. 12 illustrates a schematic diagram of an example computer readable medium in accordance with some example embodiments of the present disclosure.
  • references in the present disclosure to “one example embodiment, ” “an example embodiment, ” “an example embodiment, ” and the like indicate that the example embodiment described may include a particular feature, structure, or characteristic, but it is not necessary that every example embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same example embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an example embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other example embodiments whether or not explicitly described.
  • first and second etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments.
  • the term “and/or” includes any and all combinations of one or more of the listed terms.
  • circuitry may refer to one or more or all of the following:
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • the term “communication network” refers to a network following any suitable communication standards, such as Long Term Evolution (LTE) , LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , High-Speed Packet Access (HSPA) , Narrow Band Intemet of Things (NB-IoT) and so on.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • NB-IoT Narrow Band Intemet of Things
  • the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the future fifth generation (5G) communication protocols, and/or any other protocols either currently known or to be developed in the future.
  • Example embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will of course also be future type communication technologies and systems with which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned system.
  • location services client refers to any application or entity that has a requirement for the location services.
  • the location services client may be application software generally defined as a collection of binary information, including at least a binary executable application.
  • a terminal device refers to any end device that may be capable of wireless communication.
  • a terminal device may also be referred to as a communication device, user equipment (UE) , a Subscriber Station (SS) , a Portable Subscriber Station, a Mobile Station (MS) , or an Access Terminal (AT) .
  • UE user equipment
  • SS Subscriber Station
  • MS Mobile Station
  • AT Access Terminal
  • the terminal device may include, but not limited to, a mobile phone, a cellular phone, a smart phone, voice over IP (VolP) phones, wireless local loop phones, a tablet, a wearable terminal device, a personal digital assistant (PDA) , portable computers, desktop computer, image capture terminal devices such as digital cameras, gaming terminal devices, music storage and playback appliances, vehicle-mounted wireless terminal devices, wireless endpoints, mobile stations, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , USB dongles, smart devices, wireless customer-premises equipment (CPE) , an Internet of Things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device and applications (e.g., remote surgery) , an industrial device and applications (e.g., a robot and/or other wireless devices operating in an industrial and/or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and/or
  • positioning reference device refers to a node in a communication network which can transmit the PRS to the terminal device.
  • the term “positioning reference device” may include, but not limited to, a base station (BS) or an access point (AP) , a gateway, a registration management entity, and other suitable device in a communication system.
  • the BS or the AP may refer to, for example, a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a Remote Radio Unit (RRU) , a radio header (RH) , a remote radio head (RRH) , a relay, a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • NR NB also referred to as a gNB
  • RRU Remote Radio Unit
  • RH radio header
  • RRH remote radio head
  • relay a low power node such as a femto, a pico, and so forth, depending on the applied terminology and technology.
  • Fig. 1 shows an example communication network 100 in which example embodiments of the present disclosure can be implemented.
  • the network 100 includes a location server 110, positioning reference devices 120-1 and 120-2 (hereinafter collectively referred to as positioning reference devices 120 or individually referred to as a positioning reference device 120) and a terminal device 130 served directly by the positioning reference devices 120-1.
  • positioning reference devices 120 positioning reference devices 120-1 and 120-2
  • terminal device 130 served directly by the positioning reference devices 120-1.
  • the network 100 may include any suitable number of positioning reference devices, location servers and terminal devices adapted for implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more terminal devices may be served by the positioning reference devices 120-1 or 120-2.
  • the communications in the network 100 may conform to any suitable standards including, but not limited to, Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) and Global System for Mobile Communications (GSM) and the like.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GSM Global System for Mobile Communications
  • the communications may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols.
  • the terminal device 130 receives PRS (s) from one or more positioning reference devices 120. Then, the terminal device 130 reports measured time of arrival (ToA) of PRSs via measurement report to the location server 110.
  • the location server 110 can use a multi-literation algorithm to derive the location of the terminal device 130 based on the measurement report (s) .
  • the transmit timing of PRS from different positioning reference devices 120 may not be the same in a multi-node positioning system.
  • the PRS transmit timing offset may result in inaccurate localization in a trilateration estimation algorithm, especially when the terminal device 130 is moving with a high velocity.
  • the terminal device 130 As shown in Fig. l, as the terminal device 130 moves during the positioning measurement, the location where the terminal device 130 receives a PRS from the positioning reference device 120-1 is different from the the location where the terminal device 130 receives a PRS from the positioning reference device 120-2. That means, the terminal device 130 generates the measurement reports (timing or angle measurement report) at different locations, which decreases the accuracy of positioning estimation.
  • one possible solution for improving the accuracy positioning is reporting a time stamp together with the measurement report when measuring the PRS (s) .
  • the location server is able to decide that which measurements shall be used for localization calculation. For example, if one measurement is performed with a large time offset compared to other measurements, the measurement will be ruled out in localization calculation.
  • the location server 110 may generate a configuration of a measurement window that defines a time window for the terminal device 130 to measure PRS (s) .
  • the measurement operation performed by the terminal device 130 may be restricted within a measurement window, such that the number of useless measurement may be avoided and the power consumption of the terminal device 130 will be reduced.
  • Fig. 2 shows a schematic diagram of interactions 200 in accordance with example embodiments of the present disclosure.
  • the interactions 200 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 200 are described to be implemented at the location server 110, the positioning reference device 120, the terminal device 130 and the location services client 140.
  • the location services client 140 transmits 205 a positioning request to the location server 110.
  • the positioning request may comprise an identity of a terminal device 130, such as, phone number, Subscriber Identification Module (SIM) card numbers, serial number (SN) , or hardware ID, to be positioned.
  • the positioning request may comprise a positioning accuracy, such as, 1 metre (m) , 5 m, 10 m, and so on.
  • the positioning request may be sent by any client or application.
  • different terminal devices, services or applications may have different positioning accuracy. Therefore, the user experience may be improved accordingly.
  • transmitting the positioning request from the location services client 140 to the location server 110 is an optional operation.
  • the location server 110 obtains 210 positioning assistance information for positioning the terminal device 130.
  • the positioning assistance information comprises a velocity of the terminal device 130.
  • the positioning assistance information comprises information about the PRS.
  • the positioning assistance information comprises the positioning accuracy.
  • the location server 110 generates 215 a configuration of a measurement window at least in part based on the positioning assistance information. Specifically, the location server 110 determines a time window for the terminal device 130 to measure a PRS (s) from the positioning reference device 120.
  • the time window may be defined by a reference point of the measurement window, such as a start point of the measurement window, an end point of the measurement window, or an intermediate point of the measurement window, duration of the measurement window and a relationship between the reference point and the duration of the measurement window.
  • the local server 110 After generating the configuration of the measurement window, the local server 110 sends 220 this configuration to the terminal device 130.
  • the location server 110 can determine the time window dynamically.
  • the time window changes as the velocity and/or the positioning accuracy and/or the information of PRS changes, such that effective power consumption of the system will be achieved.
  • Detailed operations at the location server 100 will be discussed by referring to Fig. 3 to Fig. 7 below.
  • the terminal device 130 receives 225 the configuration of the measurement window from the location server 110.
  • the configuration of the measurement window may define the time window for the terminal device 130 to measure PRS(s) .
  • the terminal device 130 may obtain the time window by extracting the received configuration.
  • the detailed description about the configuration of the measurement window is omitted here, as the detailed description about the parameters comprised in the configuration of the measurement window had been described before.
  • the positioning reference device 120 transmit 230 PRS to the terminal device 130. It should be noted that although only one PRS is shown in Fig. 2, the number of PRSs transmitted from the positioning reference device 120 to the terminal device 130 is only for purpose of illustrations, rather than limitations. The number of the PRSs can be any suitable value.
  • the terminal device 130 After determining the time window, the terminal device 130 performs 235 a measurement of the PRS (s) at least in part based on the time window defined by the configuration of the measurement window. Specifically, the terminal device 130 receives the PRS (s) from the positioning reference device 120 within the measurement window and generates measurement report (s) . For the PRS (s) transmitted outside the measurement window, the terminal device 130 will ignore them. Then, the terminal device 130 sends 240 the measurement report (s) to the location server 110.
  • the terminal device 130 only performs measurement during the configured time window, and the useless measurement will be avoided.
  • terminal device 130 Detailed operations at terminal device 130 will be discussed with reference to Figs. 8-10 below.
  • the location server 110 transmits 245 a positioning response to the location services client 140. It should be appreciated that the operation 245 corresponds to the operation 205, which means that transmitting the positioning response from the location server 110 to the location services client 140 is an optional operation.
  • the location server 110 can generate a measurement window for the terminal device 130, such that the terminal device 130 performs measurement only within the measurement window. Therefore, the number of useless PRS measurement and report is avoided and power consumption of the terminal device 130 is reduced. Further, as the configuration of the measurement window is determined by the velocity of the terminal device 130 and information about the PRS or positioning accuracy, the inaccurate measurement reports will be ignored and the positioning accuracy will be improved.
  • Fig. 3 illustrates a flow chart of a method 300 in accordance with example embodiments of the present disclosure.
  • the method 300 may be implemented at any suitable devices. Only for the purpose of illustrations, the method 300 is described to be implemented at the location server 110.
  • the location server 110 obtains positioning assistance information for positioning the terminal device 130.
  • the positioning assistance information comprises the velocity of the terminal device 130.
  • the location server 110 may estimate the velocity of the terminal device 130 based on previous measurement report (s) .
  • the measurements report transmitted by the terminal device 130 may comprise the velocity of the terminal device 130, such that the location server 140 may extract the velocity of the terminal device 130 from the received previous measurement report directly.
  • the measurement report comprises a timestamp.
  • the location of the terminal device 130 can be calculated based on such measurement report. Therefore, the velocity of the terminal device 130 may be obtained by analysing the previous measurement reports.
  • the location server 110 may send a request to the terminal device 130. Such procedure will be discussed by referring to Fig. 4 as below.
  • Fig. 4 illustrates a schematic diagram of interactions 400 in accordance with example embodiments of the present disclosure.
  • the interactions 400 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 400 is described to be implemented at the location server 110 and the terminal device 130.
  • the location server 110 transmits 410 a request, such as, RequestCapabilities message in LTE Position protocol (LPP) or similar protocol in NR, to the terminal device 130.
  • a request such as, RequestCapabilities message in LTE Position protocol (LPP) or similar protocol in NR
  • LPP LTE Position protocol
  • NR NR
  • the terminal device 130 knows the velocity of itself.
  • the terminal device 130 transmits 420 a response, such as, ProvideCapabilities message of LPP or similar protocol in NR, to the location server 110 to indicate the velocity.
  • LPP LTE Position protocol
  • ProvideCapabilities message of LPP or similar protocol in NR
  • the positioning assistance information comprises information about the PRS.
  • the information about the PRS comprises at least one of: a transmit timing of the positioning reference signal and a transmit duration of the positioning reference signal.
  • the location server 110 may obtain the information about the PRS from a configuration file stored on the location server 110. Alternatively, the location server 110 may send a request to the positioning reference device 120 for the information about the PRS. Such procedure will be discussed by referring to Fig. 5 as below.
  • Fig. 5 illustrates a schematic diagram of interactions 500 in accordance with embodiments of the present disclosure.
  • the interactions 500 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 500 is described to be implemented at the location server 110 and the positioning reference device 120.
  • the location server 110 transmits 510 a request in a variety of ways, such as, Information Request message in LPPa or NRPPa, to the positioning reference device 120 for the information about the PRS. Then the positioning reference device 120 transmit 520 a response, such as, Information Response message in LPPa or NRPPa, to the location server 110 to report the information about the PRS.
  • a request in a variety of ways, such as, Information Request message in LPPa or NRPPa
  • the positioning reference device 120 transmit 520 a response, such as, Information Response message in LPPa or NRPPa, to the location server 110 to report the information about the PRS.
  • Information Request message and the Information Response message are described only for the purpose of illustration without suggesting any limitations. Those skilled in the art would readily appreciate that the request and/or the response regarding the velocity of the terminal device 130 can be implemented with various suitable messages.
  • the positioning assistance information comprises the positioning accuracy.
  • the location server 110 may obtain the positioning accuracy in a variety of ways. For example, the location server 110 may pre-set the positioning accuracy by itself. Alternatively, the location server 110 may obtain the positioning accuracy from the positioning request transmitted by the location services client 140. Such procedure will be discussed by referring to Fig. 6 as below.
  • Fig. 6 illustrates a schematic diagram of interactions 600 in accordance with example embodiments of the present disclosure.
  • the interactions 600 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 600 is described to be implemented at the location server 110 and the location services client 140.
  • the location services client 140 transmits 610 a positioning request to the location server 110 to trigger a positioning procedure.
  • the location services client 140 may transmit a request to a mobility management entity (MME) , and the MME may forward the request to the location server 110.
  • MME mobility management entity
  • Such request may comprise the requested positioning accuracy.
  • request may be transmitted according to any suitable protocols, such as Http, SIP, and so on.
  • the positioning accuracy may be dynamically adjusted according to different services type, different terminal devices to be positioned, and so on.
  • the location server 110 may generate the configuration of the measurement window at least in part based on the positioning assistance information obtained at block 310.
  • the configuration of the measurement window comprises at least one of a reference point of the measurement window, duration of the measurement window a relationship of the reference point and the duration of the measurement window.
  • the reference point of the measurement window is determined based on transmit timing of the PRS.
  • the reference point may be a configured time slot associated with the transmit timing of the PRS of the positioning reference device 120 which directly communicates to the terminal device 130.
  • the location server 110 determines the duration of the measurement window based on the velocity of the terminal device 130. In some example embodiments, the location server 110 may store a pre-set table that comprising a relationship between the duration of the measurement window and the velocity.
  • the duration of the measurement window may be calculated in a variety of ways, for example, based on the velocity of the terminal device 130.
  • the relationship between the duration of the measurement window and the velocity may be a linear or nonlinear function, and the velocity is inversely proportional to the duration.
  • the location server 110 determines the duration of the measurement window based on the positioning accuracy. In some example embodiments, the location server 110 may store a pre-set table that comprising a relationship between the duration of the measurement window and the positioning accuracy.
  • the duration of the measurement window may be calculated by a pre-defined function.
  • the relationship between the duration of the measurement window and the positioning accuracy may be a linear or nonlinear function, and the positioning accuracy is proportional to the duration.
  • the location server 110 determines the duration of the measurement window based on the transmit duration of the PRS. For example, the location server 110 may determine that the duration of the measurement window comprises a certain number (such as, 1, 2, 3 and so on) of the PRS occasion (s) .
  • the location server 110 may store a predefined combined table comprising a relationship between the duration of the measurement window and both of the positioning accuracy and the velocity.
  • the duration of the measurement window should fulfill Wherein, T is the duration of the positioning measurement window; ⁇ is a weight factor, which should be smaller than 1; d is the required positioning accuracy; c is the velocity of the terminal device 130.
  • the measurement window could be configured with periodicity.
  • the location server 110 may generate the configuration of the measurement window that comprises a first indication indicating that the measurement window is periodic.
  • the location server 110 may also generate the configuration of the measurement window that comprises a second indication indicating a repetition number of the measurement window.
  • the location server 110 determines whether to generate the configuration of the measurement window. If the velocity of the terminal device 130 exceeds a threshold velocity, the location server 110 generates the configuration of the measurement window. Alternatively, or in addition, if the positioning accuracy is below threshold accuracy, the location server 110 generates the configuration of the measurement window.
  • the location server 110 may send the configuration of the measurement window to the terminal device 130. This will be discussed by referring to Fig. 7 as below.
  • Fig. 7 illustrates a schematic diagram of interactions 700 in accordance with example embodiments of the present disclosure.
  • the interactions 700 may be implemented at any suitable devices. Only for the purpose of illustrations, the interactions 700 is described to be implemented at the location server 110 and the terminal device 130.
  • the terminal device 130 may transmit 710 a request, such as, RequestAssistanceData message of LTE Position protocol (LPP) or similar protocol in NR, to the location server 110 for the configuration of the measurement window.
  • the location server 110 sends 720 a response, such as, ProvideAssistanceData message of LPP or similar protocol in NR, to the terminal device 130.
  • the location server 110 may sends the configuration of a measurement window to the terminal device 130 periodically or autonomously.
  • the terminal device 130 only one ProvideAssistanceData message shown in Fig. 7, the number of the ProvideAssistanceData message (s) transmitted from the location server 110 to the terminal device 130 are only for purpose of illustrations, rather than limitations.
  • the number of the ProvideAssistanceData message (s) can be any suitable value.
  • Fig. 8 illustrates a flow chart of a method 800 in accordance with example embodiments of the present disclosure.
  • the method 800 may be implemented at any suitable devices. Only for the purpose of illustrations, the method 800 is described to be implemented at the terminal device 130.
  • the terminal device 130 receives the configuration of a measurement window from a location server 110.
  • the measurement window defines the time window for the terminal device 130 to measure the PRS (s) from the positioning reference device 120, as discussed above.
  • the terminal device 130 performs a measurement of the PRS (s) at least in part based on the time window defined by the configuration of the measurement window. Specifically, the terminal device 130 receives the PRS (s) from the positioning reference device 120 and generates measurement report (s) within the measurement window. For the PRS (s) transmitted outside the measurement window, the terminal device 130 will ignore them.
  • the terminal device 130 performs the positioning measurement periodically.
  • the terminal device 130 performs the positioning measurement repeatedly based on the repetition number indicated by the second indication.
  • the terminal device 130 sends the measurement report (s) to the location server 110.
  • Fig. 9 illustrates a block diagram of an example implementation 900 of the measurement window in accordance with example embodiments of the present disclosure.
  • the implementation 900 may be implemented at any suitable devices. Only for the purpose of illustrations, the implementation 900 is described to be implemented at the terminal device 130.
  • one or more positioning reference devices 120 transmit PRS(s) in different PRS occasions.
  • the terminal device 130 may receive the configuration of the measurement window from the location server 110 and then extract the information of the time window defined by the configuration. Specifically, the terminal device 130 may obtain at least one of the reference point of the measurement window, the duration of the measurement window and the relationship of the reference point and the duration of the measurement window by extracting the received configuration of the measurement window. Then the terminal device 130 may determine the location of the time window, for example, the time window 910 as shown in Fig. 9.
  • the terminal device 130 receives PRSs (930-1 to 930-9) from the positioning reference device 120, the terminal device 130 only performs PRS measurement within the time window 910. That is, the terminal device 130 reports measurement report (for example, reference signal time difference (RSTD) ) for PRSs from 930-1 to 930-6.
  • measurement report for example, reference signal time difference (RSTD)
  • the implementation 900 may include any suitable number of the PRSs and the PRS occasions.
  • Fig. 10 illustrates a block diagram of another example implementation 1000 of the measurement window in accordance with example embodiments of the present disclosure.
  • the implementation 1000 may be implemented at any suitable devices. Only for the purpose of illustrations, the implementation 1000 is described to be implemented at the terminal device 130.
  • the proposed scheme could be a combination of downlink (DL) and uplink (UL) positioning technology (for example, multi-cell round trip time (RTT) ) in NR system.
  • DL downlink
  • UL uplink
  • RTT multi-cell round trip time
  • the general idea of a multi-cell RTT method is to estimate the RTT between the terminal device 130 and multiple positioning reference devices 120 by transmitting and receiving signals between the necessary nodes.
  • One RTT measurement requires measuring a pair of DL and UL signalling. If the transmit timing of such pair of DL and UL PRS is far away to each other, the positioning accuracy will be decreased.
  • the terminal device 130 transmits UL PRS at UP PRS occasion 1050.
  • the terminal device 130 may receive the configuration of the measurement window from the location server 110 and then extract the information of the time window defined by the configuration. As discussed above, the terminal device 130 may determine the location of the time window, for example, the time window 1010 as shown in Fig. 10. Although the terminal device 130 receives PRSs (1030-1 to 1030-9) from the positioning reference device 120, the terminal device 130 only performs PRS measurement within the time window 1010. That is, the terminal device 130 reports measurement report (for example, reference signal time difference (RSTD) ) for PRSs from 1030-1 to 1030-3.
  • RSTD reference signal time difference
  • the apparatus further comprises means for performing other steps in some example embodiments of the method 300.
  • the means comprises at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
  • an apparatus capable of performing any of the method 300 may comprise means for performing the respective steps of the method 300.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for obtaining, at a location server, positioning assistance information for positioning a terminal device; means for generating a configuration of a measurement window at least in part based on the positioning assistance information, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; and means for sending the configuration of the measurement window to the terminal device.
  • the positioning assistance information comprises at least one of: a velocity of the terminal device; information about the positioning reference signal; and requested positioning accuracy.
  • the information about the positioning reference signal comprises at least one of: a transmit timing of the positioning reference signal; and a transmit duration of the positioning reference signal.
  • the means for obtaining the positioning assistance information comprises: means for in response to receiving from the terminal device a response to a request, obtaining the velocity of the terminal device from the response; or means for in response to receiving from the terminal device a measurement report, estimating the velocity of the terminal device at least in part of the measurement report.
  • the means for obtaining the positioning assistance information comprises: means for sending a request to the positioning reference device for information about the positioning reference signal; in response to receiving from the positioning reference device a response to the request, obtaining the information about the positioning reference signal from the response.
  • the means for obtaining the requested positioning accuracy comprises: means for in response to receiving from a location services client a request comprising positioning accuracy for positioning the terminal, obtaining the requested positioning accuracy from the request; means for obtaining the requested positioning accuracy from the mobility management entity.
  • the configuration of the measurement window comprises at least one of: a reference point of the measurement window; duration of the measurement window; and a relationship of the reference point and the duration of the measurement window.
  • the configuration of the measurement window further comprises: a first indication indicating that the measurement window is periodic; or a second indication indicating a repetition number of the measurement window.
  • the means for generating the configuration comprises at least one of: means for determining a reference point of the measurement window based on information about the positioning reference signal; means for determining duration of the measurement window based on at least one of a velocity of the terminal device, information about the positioning reference signal and positioning accuracy of the terminal device and means for defining a relationship between the reference point and the duration of the measurement window.
  • the means for determining the reference point comprises: means for determining the reference point of the measurement window at least in part based on the transmit timing of the positioning reference signal.
  • the means for generating the configuration comprises at least one of: means for in response to the velocity of the terminal device exceeding a threshold velocity, generating the configuration of the measurement window; and means for in response to the positioning accuracy being below threshold accuracy, generating the configuration of the measurement window.
  • the apparatus further comprises means for performing other steps in some example embodiments of the method 800.
  • the means comprises at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the performance of the apparatus.
  • an apparatus capable of performing any of the method 800 may comprise means for performing the respective steps of the method 800.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • the apparatus comprises means for receiving, at a terminal device, a configuration of a measurement window from a location server, the measurement window defining a time window for the terminal device to measure a positioning reference signal from a positioning reference device; means for performing a measurement of the positioning reference signal at least in part based on the time window defined by the configuration of the measurement window; and means for sending a measurement report to the location server.
  • the apparatus further comprises means for in response to receiving from the location server a request for a velocity of the terminal device, sending a response comprising the velocity of the terminal device to the location server.
  • the configuration of the measurement window comprises at least one of: a reference point of the measurement window; duration of the measurement window; and a relationship of the reference point and the duration of the measurement window.
  • the configuration of the measurement window further comprises: a first indication indicating that the measurement window is periodic; or a second indication indicating a repetition number of the measurement window.
  • the means for performing the positioning measurement comprises: means for determining whether the configuration of the measurement window comprises the first indication; and in response to determining that the configuration of the measurement window comprises the first indication, performing the positioning measurement periodically.
  • the means for performing the positioning measurement comprises: means for determining whether the configuration of the measurement window comprises the second indication; and in response to determining that the configuration of the measurement window comprises the second indication, performing the positioning measurement repeatedly based on the repetition number indicated by the second indication.
  • FIG. 11 is a simplified block diagram of a device 1100 that is suitable for implementing example embodiments of the present disclosure.
  • the device 1100 may be provided to implement the communication device, for example the terminal device 120, the network device 111 or the network device 112 as shown in Fig. 1.
  • the device 1100 includes one or more processors 1110, one or more memories 1140 coupled to the processor 1110, and one or more transmitters and/or receivers (TX/RX) 1140 coupled to the processor 1110.
  • TX/RX transmitters and/or receivers
  • the TX/RX 1140 is for bidirectional communications.
  • the TX/RX 1140 has at least one antenna to facilitate communication.
  • the communication interface may represent any interface that is necessary for communication with other network elements.
  • the processor 1110 may be of any type suitable to the local technical network and may include one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 1100 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the memory 1120 may include one or more non-volatile memories and one or more volatile memories.
  • the non-volatile memories include, but are not limited to, a Read Only Memory (ROM) 1124, an electrically programmable read only memory (EPROM) , a flash memory, a hard disk, a compact disc (CD) , a digital video disk (DVD) , and other magnetic storage and/or optical storage.
  • the volatile memories include, but are not limited to, a random access memory (RAM) 1122 and other volatile memories that will not last in the power-down duration.
  • a computer program 1130 includes computer executable instructions that are executed by the associated processor 1110.
  • the program 1130 may be stored in the ROM 1020.
  • the processor 1110 may perform any suitable actions and processing by loading the program 1130 into the RAM 1120.
  • the example embodiments of the present disclosure may be implemented by means of the program 1130 so that the device 1100 may perform any process of the disclosure as discussed with reference to Figs. 3 to 8.
  • the example embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.
  • the program 1130 may be tangibly contained in a computer readable medium which may be included in the device 1100 (such as in the memory 1120) or other storage devices that are accessible by the device 1100.
  • the device 1100 may load the program 1130 from the computer readable medium to the RAM 1122 for execution.
  • the computer readable medium may include any types of tangible non-volatile storage, such as ROM, EPROM, a flash memory, a hard disk, CD, DVD, and the like.
  • Fig. 12 shows an example of the computer readable medium 1200 in form of CD or DVD.
  • the computer readable medium has the program 1130 stored thereon.
  • various example embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of example embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the method 300 and method 800 as described above with reference to Figs. 2-8.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various example embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable medium, and the like.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention concernent une mesure de positionnement sans fil. Un serveur de localisation obtient des informations d'assistance au positionnement permettant de positionner un dispositif terminal ; génère une configuration d'une fenêtre de mesure au moins en partie en fonction des informations d'assistance au positionnement, la fenêtre de mesure définissant une fenêtre temporelle permettant au dispositif terminal de mesurer un signal de référence de positionnement à partir d'un dispositif de référence de positionnement ; et envoie la configuration de la fenêtre de mesure au dispositif terminal. Ainsi, le nombre de mesures inutiles peut être évité et la consommation d'énergie du dispositif terminal sera réduite.
PCT/CN2019/079829 2019-03-27 2019-03-27 Mesure de positionnement sans fil WO2020191646A1 (fr)

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WO2022135267A1 (fr) * 2020-12-21 2022-06-30 维沃移动通信有限公司 Procédé et appareil de meure de positionnement, dispositif et support de stockage lisible
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WO2022194143A1 (fr) * 2021-03-17 2022-09-22 维沃移动通信有限公司 Procédé et appareil de positionnement, et dispositif de communication
WO2022206249A1 (fr) * 2021-04-01 2022-10-06 大唐移动通信设备有限公司 Procédé et appareil de traitement d'informations, terminal et dispositif côté réseau
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WO2023151005A1 (fr) * 2022-02-11 2023-08-17 Zte Corporation Systèmes et procédés de vérification d'emplacement
WO2023185724A1 (fr) * 2022-03-28 2023-10-05 维沃移动通信有限公司 Procédé et appareil de traitement de positionnement, terminal et dispositif côté réseau
WO2024027739A1 (fr) * 2022-08-02 2024-02-08 华为技术有限公司 Procédé de communication et appareil
WO2024065223A1 (fr) * 2022-09-27 2024-04-04 北京小米移动软件有限公司 Procédé et appareil de mesure d'informations de système mondial de navigation par satellite (gnss)

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