WO2024033426A1 - Positionnement d'ue en mode déconnecté - Google Patents

Positionnement d'ue en mode déconnecté Download PDF

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Publication number
WO2024033426A1
WO2024033426A1 PCT/EP2023/072078 EP2023072078W WO2024033426A1 WO 2024033426 A1 WO2024033426 A1 WO 2024033426A1 EP 2023072078 W EP2023072078 W EP 2023072078W WO 2024033426 A1 WO2024033426 A1 WO 2024033426A1
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WO
WIPO (PCT)
Prior art keywords
ppt
message
positioning
dci
paging
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PCT/EP2023/072078
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English (en)
Inventor
Nafiseh Seyed MAZLOUM
Basuki PRIYANTO
Anders Berggren
Torgny Palenius
Original Assignee
Sony Group Corporation
Sony Europe B.V.
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 Sony Group Corporation, Sony Europe B.V. filed Critical Sony Group Corporation
Publication of WO2024033426A1 publication Critical patent/WO2024033426A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H04W68/025—Indirect paging

Definitions

  • the invention generally relates to low-power high-accuracy positioning (LPHAP) of user equipment devices (UEs) in cellular networks.
  • LPHAP low-power high-accuracy positioning
  • a UE To position a UE in a cellular network, a UE typically needs to be operated either for the entirety or at least for the configuration of the positioning procedure in a connected mode.
  • operating a UE in a connected mode is power consuming. Since quite some information needs to be conveyed to a UE during the configuration of the positioning procedure, it has so far not been possible to configure the positioning procedure in a less power consuming disconnected mode. Conveying larger amounts of data in a disconnected mode is typically not possible due to power savings requirements in a disconnected mode.
  • the present invention provides a method for configuring a positioning procedure at a UE in a disconnected mode, the method comprising the steps of monitoring, during the disconnected mode, a downlink channel between an access node of a cellular network and the UE for a positioning procedure trigger (PPT), and upon receipt of a PPT, performing a positioning procedure based on the PPT.
  • PPT positioning procedure trigger
  • FIG. 1 schematically illustrates a cellular network and a UE that is connectable to the cellular network according to embodiments of the present invention.
  • FIG. 2 schematically illustrates connection modes, in which the UE is connectable to the cellular network according to embodiments of the present invention.
  • FIG. 3 schematically illustrates a discontinuous reception cycle of a discontinuous reception operation of the UE according to embodiments of the present invention.
  • FIG. 4 schematically illustrates a base station according to embodiments of the present invention.
  • FIG. 5 schematically illustrates the UE according to embodiments of the present invention.
  • FIG. 6 schematically illustrates a position control node according to embodiments of the present invention.
  • FIG. 7 provides a flowchart of a UE positioning configuration method according to embodiments of the present invention.
  • Fig. 8 shows an example transmission of a PPT during disconnected mode according to embodiments of the present invention.
  • Fig. 9 provides a signaling diagram relating to the UE positioning method according to embodiments of the present invention.
  • the invention generally provides a method for configuring a positioning procedure at a UE in a disconnected mode.
  • a positioning procedure trigger PPT
  • the PPT provides a configuration of a positioning procedure, which determines the position of the UE.
  • the positioning procedure is performed as defined in the PPT.
  • FIG. 1 to 6 provide a general overview of various aspects of the cellular network. Based on this general overview, Figs. 7 to 9 illustrate the UE positioning configuration method.
  • FIG. 1 schematically illustrates a cellular network (NW) 100.
  • the example of FIG. 1 illustrates the cellular NW 100 according to the 3GPP 5G architecture. Details of the 3GPP 5G architecture are described in 3GPP TS 23.501 , version 1.3.0 (2017-09). While FIG. 1 and further parts of the following description illustrate techniques in the 3GPP 5G framework of a cellular NW, similar techniques may be readily applied to other communication networks. Examples include e.g., an IEEE Wi-Fi technology.
  • a UE 101 is connectable to the cellular NW 100.
  • the UE 101 may be one of the following: a cellular phone; a smart phone; an IOT device; a MTC device; a sensor; an actuator; etc.
  • the UE 101 is connectable to the network 100 via a RAN (radio access network) 111 , typically formed by one or more base stations (BSs) 112 (only a single BS 112 is illustrated in FIG. 1 for the sake of simplicity).
  • a wireless link 114 is established between the RAN 111 - specifically between one or more of the BSs 112 of the RAN 111 - and the UE 101 .
  • the wireless link 114 is defined by one or more OFDM carriers.
  • the RAN 111 is connected to a core network (CN) 115.
  • the CN 115 includes a user plane (UP) 191 and a control plane (CP) 192. Application data is typically routed via the UP 191.
  • UP user plane
  • CP control plane
  • a UP function (UPF) 121 may implement router functionality.
  • Application data may pass through one or more UPFs 121 .
  • the UPF 121 acts as a gateway towards a data network 180, e.g., the Internet or a Local Area Network.
  • Application data can be communicated between the UE 101 and one or more servers on the data network 180.
  • the cellular NW 100 also includes an Access and Mobility Management Function (AMF) 131 implementing a mobility control node; a Session Management Function (SMF) 132; a Policy Control Function (PCF) 133; an Application Function (AF) 134; a Network Slice Selection Function (NSSF) 135; an Authentication Server Function (AUSF) 136; a Unified Data Management (UDM) 137; and a Location Management Function (LMF) 139 implementing a location control node.
  • AMF Access and Mobility Management Function
  • SMF Session Management Function
  • PCF Policy Control Function
  • AF Application Function
  • NSSF Network Slice Selection Function
  • AUSF Authentication Server Function
  • UDM Unified Data Management
  • LMF Location Management Function
  • the AMF 131 - implementing a mobility control node - provides one or more of the following functionalities: registration management; non-access stratum (NAS) termination; connection management; reachability management; mobility management; access authentication; and access authorization.
  • a data connection 189 is established by the AMF 131 if the respective UE 101 operates in a connected mode.
  • POs can be managed by the AMF 131 , e.g., a time offset may be applied with respect to reference timing of paging occasions, the reference timing being defined by an identity associated with the respective UE 101.
  • the SMF 132 provides one or more of the following functionalities: session management including session establishment, modify and release, including bearer set up of UP bearers between the RAN 111 and the UPF 121 ; selection and control of UPFs; configuring of traffic steering; roaming functionality; termination of at least parts of NAS messages; etc.
  • session management including session establishment, modify and release, including bearer set up of UP bearers between the RAN 111 and the UPF 121 ; selection and control of UPFs; configuring of traffic steering; roaming functionality; termination of at least parts of NAS messages; etc.
  • the AMF 131 and the SMF 132 both implement CP mobility management needed to support a moving UE.
  • the data connection 189 is established between the UE 101 via the RAN 111 and the data plane 191 of the CN 115 and towards the DN 180. For example, a connection with the Internet or another packet data network can be established.
  • a server of the DN 180 may host a service for which payload data is communicated via the data connection 189.
  • the data connection 189 may include one or more bearers such as a dedicated bearer or a default bearer.
  • the data connection 189 may be defined on the RRC layer, e.g., generally Layer 3 of the Operating Systems Interconnection (OSI) model of Layer 2.
  • the data connection 189 can carry application data.
  • the LMF 139 handles location service requests. This may include transferring assistance data to the target UE 101 to be positioned to assist with UE- based and/or UE-assisted positioning and/or may include positioning of the target UE. See 3GPP TS 38.305 V15.3.0 (2019-03), section 5.1.
  • the LMF 139 may instigate positioning using a PP with the UE 101 - e.g. to obtain a location estimate or positioning measurements or to transfer location assistance data to the UE 101 .
  • FIG. 2 schematically illustrates aspects with respect to multiple operational modes 301 -303 in which a UE can operate.
  • the data connection 189 is established in the connected mode 301.
  • a RAN-part of the data connection 189 is established in the connected mode 301 .
  • Data can be communicated between the UE 101 and the BS 112 using a physical downlink shared channel (PDSCH), physical downlink control channel (PDCCH), physical uplink shared channel (PUSCH), physical uplink control channel (PUCCH).
  • RRC control messages can be communicated on PDSCH and/or PUSCH.
  • the connected mode 301 can be implemented by the 3GPP RRC_CON- NECT state.
  • FIG. 2 further illustrates two disconnected modes 302, 303.
  • a first disconnected mode is the idle mode 302, e.g., implemented by 3GPP RRCJDLE.
  • a second disconnected mode is the inactive mode 303, e.g., implemented by 3GPP RRCJNACTIVE.
  • the inactive mode 303 is transparent to the CN 115, while the idle mode 302 may be signaled to the CN 115.
  • the channels established in connected mode 301 such as PDCCH and PDSCH, are also used in disconnected modes 302 and 303 to convey data. For example, at least a part of a PPT may be communicated on PDCCH. In addition, at least a part of a PPT may also be communicated on PDSCH. It is possible to use disconnected mode DRX to communicate a PPT.
  • FIG. 2 also illustrates aspects with respect to the transitions 309 between the various modes 301 -303.
  • a connection deactivation message can be communicated, e.g., using RRC control signaling on the PDSCH or PUSCH. This may be a connection inactivate control message for the transition 309 to the inactive mode 303; or a connection release message for the transition 309 to the idle mode 302.
  • connection release message reduces the data connection 189 to a limited number of communication purposes, such as public land mobile network (PLMN) selection, broadcast of system information, cell re-selection mobility, paging for mobile terminated data initiated by CN 115, paging for mobile terminated data area managed CN 115 and DRX for CN paging configured by AMF 131.
  • PLMN public land mobile network
  • the deactivation messages may include an information element that carries additional data. For instance, information of a positioning procedure can be included in such information elements.
  • the transition 309 from the idle mode 302 or the inactive mode 303 to the connected mode 301 includes a RACH procedure.
  • the RACH procedure may be triggered by paging signals, e.g., a paging indicator on PDCCH and a paging message on PDSCH.
  • paging can be triggered by the RAN; while in the idle mode 302 the paging is triggered by the CN.
  • the RACH procedure can include an uplink transmission of a preamble, a DL random access response message, an uplink RRC resumes-message and, e.g., a DL release or connection establishment message.
  • the random-access procedure may also be used to transmit uplink data from the UE to the cellular NW.
  • UE-originating (mobile originating, MO) UL data may be communicated.
  • the random-access procedure could also be used to provide DL data to the UE, i.e. , UE-terminating (mobile terminating, MT) DL data.
  • a small data transmission (SDT) protocol can be employed to accommodate data, e.g., and a Random Access Message 3 or 4 (RRC Resume message and RRC Release message).
  • RRC Resume message and RRC Release message Random Access Message
  • the disconnected modes 302, 303 are typically associated with DRX operation of the UE 101.
  • FIG. 3 schematically illustrates aspects with respect to DRX operation 400 of the UE 101.
  • the DRX operation 400 illustrated in FIG. 3 may be associated with a disconnected mode such as the idle mode 302 or the inactive mode 303 as discussed above in connection with FIG. 2.
  • the DRX operation 400 of the UE 101 is characterized by various parameters. Techniques are disclosed that pertain to the cellular NW configuring the DRX operation 400 of the UE. Configuring the DRX operation 400 of the UE 101 means that one or more of these parameters are set at the UE based on information provided from the cellular NW.
  • the DRX operation 400 defines a repetitive transition of the wireless interface of the UE 101 back-and-forth between an inactive state 405 and an active state 406.
  • the respective active duration 408 of the active state 406 is illustrated in FIG. 3.
  • the UE does not receive any downlink data when the wireless interface operates in the inactive state 405. However, the UE may initiate the RACH procedure even in the inactive state 405.
  • the DRX operation of the UE 101 is configured so that during the active duration 408 the UE monitors for paging signals during a respective paging occasion (PO) 411 , performs a positioning measurement during a respective position measurement occasion (PMO) 412 and/or implements reporting on the positioning measurement during a respective position reporting occasion (PRO) 413.
  • PO paging occasion
  • PMO position measurement occasion
  • PRO position reporting occasion
  • the PO 411 paging signals may or may not be transmitted by the cellular NW 100, depending on whether the UE 101 is paged or not.
  • the PRO 413 may be associated with an opportunity for the UE to provide UL data including positioning measurement report(s) to the cellular NW 100.
  • an SDT may be used.
  • the DRX operation 400 of the UE 101 is configured so that the active duration 408 includes, in sequence, the PO 411 , the PMO 412, as well as the PRO 413.
  • the active duration 408 includes, in sequence, the PO 411 , the PMO 412, as well as the PRO 413.
  • FIG. 3 schematically illustrates a scenario in which the PO 411 , the PMO 412 and the PRO 413 are all adjacent to each other in the time domain, there may be a time gap in between two or more of these occasions.
  • the DRX operation of the UE 101 is configured to transition into the inactive state 405 between, e.g., the PRO 413 and the PMO 412, to give just one example.
  • power-efficient operation of the UE 101 may be supported; because the switching back and forth between the inactive state 405 and the active state 406 can be reduced.
  • TAB. 1 Various options for providing information elements to the UE 101 that enable the UE 101 to configure the DRX operation 400.
  • the concrete timings for transitioning from the inactive state to the active state (or vice versa) are UE-implementation details that are derived from information elements as pre- sented above. The reason is that, e.g., the time required for transitioning from the active state to the inactive state or vice versa depends on the receiver hardware of the UE. Accordingly, to accommodate for a sufficient lead time to transition the receiver hardware from the inactive state to the active state prior to a time span during which the UE is expected to monitor for signals can be up to UE imple- mentation.
  • FIG. 4 schematically illustrates the BS 112.
  • the BSs 112-1 - 112-4 could be configured accordingly.
  • the BS 112 includes an interface 1121.
  • the interface 1121 may include an analog front end and a digital front end.
  • the BS 112 further includes control circuitry 1122, e.g., implemented by means of one or more processors and software.
  • control circuitry 1122 e.g., implemented by means of one or more processors and software.
  • program code to be executed by the control circuitry 1122 may be stored in a non-volatile memory 1123.
  • control circuitry 1122 may be implemented by the control circuitry 1122, e.g.: providing a PPT to UEs, configuring DRX operation of the UEs, e.g., defining a time offset of the PO with respect to a reference timing, assigning a temporary identity to the UE; etc.
  • the BS 112 may also communicate with the LMF 139.
  • the BS may provide information regarding the DRX operation of a UE 101 to the LMF 139, e.g., timing of PO or DRX cycle timing information, receive positioning requests from the LMF 139 and forward the positioning requests to the UE 101.
  • the BS 112 may receive assistance information from the LMF 139.
  • Communica- tion/signaling between the BS 112 and the LMF 139 may be implemented according to 3GPP TS 36.305 version 16.3.0 Release 16, Section 6.5: Signaling between an E-SMLC and eNode B.
  • FIG. 5 schematically illustrates the UE 101.
  • the UE 101 includes a wireless interface 1011.
  • the interface 1011 may include an analog front end and a digital front end.
  • the UE 101 further includes control circuitry 1012, e.g., implemented by means of one or more processors and software.
  • the control circuitry 1012 may also be at least partly implemented in hardware.
  • program code to be executed by the control circuitry 1012 may be stored in a non-volatile memory 1013.
  • various functionality may be implemented by the control circuitry 1012, e.g.: operating in a connected or a disconnected mode; provide information regarding DRX operation to the AMF 131 ; monitoring, during the disconnected mode, a downlink channel between RAN 111 of the cellular NW 100 and UE 101 for a PPT and upon receipt of a PPT, performing a positioning procedure based on the PPT, etc.
  • the UE 101 may communicate with the LMF 139 according to 3GPP TS 36.305 version 16.3.0 Release 16, Section 6.4: Signaling between an E-SMLC and UE.
  • FIG. 6 schematically illustrates a location control node implemented, in the example of FIG. 6, by the LMF 139.
  • the LMF 139 includes an interface 1391 for communicating with other nodes of the CN 115 or with the RAN 111 of the cellular NW 100.
  • the LMF 139 further includes control circuitry 1392, e.g., implemented by means of one or more processors and software. For example, program code to be executed by the control circuitry 1392 may be stored in a non-volatile memory 1393. In the various examples disclosed herein, various functionality may be implemented by the control circuitry 1392.
  • FIG. 7 provides a flowchart of UE positioning configuration method 700.
  • Method 100 configures a positioning procedure at UE 101 in a disconnected mode, as will be discussed in the following.
  • the positioning procedure configured by method 700 refers to any procedure capable of determining the position and in some embodiments also the orientation of UE 101 relative to BS 112.
  • the position procedure may be performed by UE 101 , e.g. using position reference signals (PRSs).
  • PRSs position reference signals
  • the position procedure may be performed with the assistance of UE 101 , e.g. by transmitting sounding reference signals (SRSs) to BS 112.
  • SRSs sounding reference signals
  • BS 112 determines, based on an SRS received from UE 101 , the position of UE 101 relative to BS 112. It will be understood that positioning procedure may thus refer to any procedure capable of determining at least the position of UE 101 relative to BS 112.
  • Disconnected mode refers to both idle mode 302 and inactive mode 303, as discussed above with regard to Fig. 3.
  • method 700 may provide, to a monitoring node of cellular NW 100, a UE capability information message.
  • the UE capability information message may indicate at least a capability to receive a positioning procedure trigger (PPT) during the disconnected mode. More precisely, method 700 may, prior to configuring the positioning procedure, determine the capabilities of UE 101 relevant to configuring the PPT by exchanging UE capability information message between UE 101 and a monitoring node of cellular NW 100.
  • the UE capability information message may indicate at least one of one or more positioning procedures supported by the UE; and a downlink control information (DCI) message receivable by the UE.
  • the one or more positioning procedures may be any one of the positioning procedures discussed above.
  • DCI may refer to control information provided to UE 101 from cellular NW 100 to configure data transmission from UE 101 to cellular NW 100, as defined e.g. in 3GPP TS 38.212, section 7.3.1 , version 17.2.0. DCI may be transmitted over PDCCH.
  • Monitoring node may refer to an access node of cellular NW 100, such as BS 112 or more generally RAN 111 , or may refer to a mobility control node of cellular NW 100, such as AMF 131.
  • BS 112 may receive the UE capability information and forward it to AMF 131.
  • AMF 131 may store the UE capability information. Exchange of the UE capability information may be performed in connected mode 301 .
  • the PPT refers to an indication, which defines the positioning procedure to be used to position UE 101 relative to BS 112 and triggers the positioning procedure as defined. In other words, the PPT combines both the configuration and the trigger of the positioning procedure. Depending on the amount of data necessary to define the positioning procedure and in some embodiments based on the UE capability information, parts of the PPT may be included in various messages, as will be discussed in the following.
  • the DCI message may for example be a paging early indication (PEI) DCI or a paging DCI.
  • PEI DCI may be a DCI message with DCI format 2_7, as defined in chapter 7.3.1.3.8 of 3GPP specification TS 38.212, version 17.2.0.
  • DCI format 2_7 may be amended to include a new field, into which at least part of the PPT may be included.
  • a paging DCI may be a DCI message with format 1_0 with the cyclic redundancy check (CRC) scrambled with a paging radio network temporary identifier (P-RNTI), as defined in chapter 7.3.1.2.1 of 3GPP specification TS 38.212, version 17.2.0.
  • DCI format 1_0 with CRC scrambled with P-RNTI includes 6 reserved bits, which may be used to include at least a part of the PPT. It should be noted that at least a part of the PPT may also be included in other suitable DCI messages. Accordingly, at least a part of the PPT may be transmitted via PDCCH.
  • a paging message may include paging information as e.g. defined chapter 6.2.2 of 3GPP specification TS 38.331 , version 17.1.0 and may be amended to further include at least part of the PPT.
  • the paging message may be transmitted over PDSCH.
  • the PPT may be partly or entirely included in one or more DCI messages and one or more paging messages. Further, the PPT may be communicated via both PDCCH and PDSCH in disconnected mode. The PPT may thus be distributed across various communication elements and communication channels. The distribution depends on how much data is required to define and to trigger the positioning procedure. The distribution may depend on whether an individual UE or a group of UEs are to be triggered for positioning procedure. Further, the distribution may depend on the capabilities of UE 101.
  • the PPT may indicate at least one of a positioning request, a type of the positioning request, a positioning method type and recipient information.
  • the positioning request may indicate whether or not a positioning procedure should be performed. Accordingly, the positioning request serves as the trigger of the positioning procedure.
  • the type of the positioning request may indicate one of a UE-based positioning request or a UE-assisted positioning request. In other words, the type of the positioning procedure may indicate whether the position of UE 101 relative to BS 112 is to be determined by UE 101 , e.g. by using PRSs, or by cellular NW 100, e.g. by using SRSs.
  • the positioning method type may indicate the method used to determine the position of UE 101 relative to BS 112.
  • the positioning method type may indicate to use triangulation between UE 101 , a further UE and BS 112 to determine the position of UE 101 relative to BS 112.
  • the recipient information may indicate one of a group of UEs or an individual UE which are to perform the positioning procedure.
  • the recipient information may indicate a subset of all UEs connected to a cell which is to perform the positioning procedure.
  • the group of UEs may be selected based on a selection rule or selected randomly.
  • An example of a selection rule is to select the UEs based on their UE-ID.
  • the PPT may indicate only a subset of the above pieces of information or may indicate further pieces of information, as required to define and trigger the positioning procedure in disconnected mode.
  • the PPT may be distributed over various communication elements. Accordingly, the various indicators, which may be included in the PPT, may be distributed across the various communication elements. The distribution of the various indicators across the various communication elements in disconnected mode depends on the bandwidth required to convey the respective pieces of information. In other words, the various indicators discussed above may be included in the communication elements depending on the number of bits required to exchange them as part of the PPT. The distribution may depend on whether an individual UE or a group of UEs are to be triggered for positioning procedure. Various examples of inclusion of the indicators or parts of the PPT will be provided in the following.
  • the positioning request of the PPT may be included in a DCI message.
  • the positioning request may e.g. be a bitflag, which indicates whether to trigger, i.e. perform, the positioning procedure.
  • the number of bits required to convey the positioning request may be one. Even if the positioning request is not a bitflag, the positioning request will typically require only a limited number of bits. Accordingly, the positioning request may be included in e.g. one of the six reserved bits of a paging DCI or may be added to a PEI DCI.
  • the recipient information may likewise be included in a DCI message.
  • the CRC of a paging DCI may be scrambled with a P-RNTI.
  • the P-RNTI may be assigned to an individual UE or a group of UEs. Accordingly, such a DCI message can only be unscrambled by the one or more UEs who are the intended recipients of the DCI message.
  • the recipient information of the PPT may be included in a DCI message without requiring any additional bits.
  • the recipient information may also be included in reserved bits of a DCI message or may be added to a DCI message.
  • the recipient information may indicate whether a group of UEs or an individual UE are to perform the positioning procedure, e.g. via a bitflag.
  • the recipient information may further be included in a paging message.
  • more detailed recipient information such as an identifier of an individual UE or details on a group of UEs, e.g. a subset of UEs associated with a P-RNTI, may be included in the paging message.
  • the recipient information in the DCI message may thus instruct a UE to locate further parts of the PPT, i.e. further parts of the recipient information, in the paging message.
  • the type of the positioning request and the positioning method type may be included in one of a DCI message and a paging message. Whether the type of the positioning request and the positioning method type are included in a DCI message and/or in a paging message depends on the number of bits necessary to convey them. For example, if the type of positioning request only indicates whether the positioning procedure is to be UE-based or UE-assisted, the type of the positioning request may be only included in a DCI message. If the type of the positioning request is to include further information, the type of the positioning request may be split between the DCI message and the paging message. The same may apply to the positioning method type. For example, if the positioning procedure is to be performed by a group of UEs, the positioning method type may further include scheduling information indicating when each or subsets of the group of UEs is to perform the positioning procedure.
  • the PPT may be distributed across more than one DCI message and/or more than one paging message.
  • the positioning request may be included in one DCI message, such as a PEI DCI
  • a part of the recipient information may be included in another DCI message, such as a paging DCI
  • a further part of the recipient information may be included together with the positioning method type in the paging message.
  • Such a distribution may be used if the PPT requires a large number of bits.
  • step 720 method 700 may obtain a PPT configuration message from cellular NW 100 during connected mode 301.
  • the PPT configuration message may configure UE 101 to monitor the downlink channel for the PPT during the disconnected mode.
  • the PPT configuration message may define a structure of the PPT.
  • the structure may indicate the above-discussed distribution, i.e. the structure may indicate at least a DCI message, which includes at least a part of the PPT.
  • the structure may further indicate a paging message, which includes at least a part of the PPT.
  • the PPT may depend on the capabilities of UE 101 , i.e. in particular which DCI messages UE 101 is capable of receiving. Therefore, the PPT configuration message may in some embodiments be based on the UE capability information obtained in step 710.
  • the PPT configuration message may be conveyed as part of one of a system information block (SIB) or a radio resource control (RRC) message.
  • SIB system information block
  • RRC radio resource control
  • the RRC message may e.g. be RRC message 4.
  • step 730 method 700 monitors during the disconnected mode, a downlink channel between BS 112 or more generally RAN 111 of cellular NW 100 and UE 101 for the PPT.
  • the downlink channel may typically be PDCCH.
  • parts of the PPT received on PDCCH may instruct UE 101 to then also monitor PDCCH for further parts of the PPT.
  • step 740 method 700 performs, upon receipt of the PPT, a positioning procedure based on the PPT.
  • Performing the positioning procedure may comprise transmitting or receiving reference signals for positioning during the disconnected mode, such as PRSs or SRSs, as discussed above.
  • method 700 configures the PPT based on amount of data, i.e. the number of bits, by distributing the PPT across downlink communication elements.
  • Method 700 may thus provide a flexible structure of the PPT, based on data needs and the capabilities of UE 101.
  • FIG. 8 shows an example PPT transmission 800 during disconnected mode.
  • PPT transmission 800 is based on DRX cycle 400 discussed above with regard to Fig. 3.
  • a PPT may be transmitted over PDCCH and in some embodiments also over PDSCH during active durations 408 as indicated on the time axis of Fig. 8.
  • both channels are shown here in the same transmission diagram.
  • Fig. 8 shows three example active durations 408 separated by inactive durations 405. It should be noted that inactive periods 405 may be much longer than shown in Fig. 8, as indicated on the time axis of Fig.8.
  • the actual transmissions of the PPT are indicated by transmissions drawn with solid lines, as shown in the second active duration 408.
  • Expected transmissions i.e., transmissions which were expected but did not occur, are drawn with dashed lines, as shown in the first and third active durations 408. Accordingly, in the example of Fig. 8, a PPT transmission is only received during the second active duration 408.
  • the horizontally striped transmission may be a PEI DCI
  • the vertically striped transmission may be a paging DCI
  • the slanted striped transmission may be a paging message.
  • there may be two different POs i.e. DCI PO 411a and paging message PO 411 b.
  • UE 101 may monitor PDCCH for a DCI message which may include at least a part of the PPT.
  • UE 101 may monitor PDSCH for a paging message which may likewise include at least a part of the PPT.
  • UE 101 may in some embodiments only monitor PDSCH for a part of the PPT during paging PO 411 b if instructed to do so by the part of the PPT included in a DCI message received during DCI PO 411 a.
  • UE 101 may only monitor PDSCH during paging PO 411 b and may refrain from monitoring PDCCH during DCI PO 411 a, depending on the configuration of the PPT, i.e., depending on the structure or distribution of the PPT across various communication elements.
  • PDCCH and PDSCH are merely example communication channels. Depending on the communication elements into which the PPT is integrated, other communication channels may be used.
  • Fig. 9 provides a signaling diagram 900 illustrating which nodes of communication NW 100 may perform the steps of method 700.
  • Step 710 may be performed by UE 101 , BS 112 and AMF 131 , as indicated by the arrow between UE 101 , BS 112 and AMF 131. More precisely, UE 101 may provide the UE capability message to BS 112 and to AMF 131 . Providing the UE capability message may include, in some embodiments, negotiating with the UE 101 which capabilities UE 101 may offer for the configuration of the PPT. This may e.g., be the case if UE 101 may only be able to receive a specific number of DCIs during disconnected mode. To reflect this fact, the arrow indicating step 710 in Fig. 9 is double-headed.
  • Step 720 is shown in Fig. 9 as split into four parts, i.e., steps 720a to 720d.
  • obtaining the PPT configuration may be performed in sub-steps by various nodes of communication NW 100.
  • BS 112, AMF 131 and LMF 139 may define the PPT configuration based on the amount of configuration data needed to be conveyed, based on the capabilities of the UE and based on the positioning requirements of the cell in which UE 101 is located. Either one of BS 112, AMF 131 and LMF 139 may perform step 720a, either alone or in conjunction with any one of the other two nodes.
  • AMF 131 may provide the PPT configuration to BS 112.
  • step 720b may also be performed by LMF 139.
  • BS 112 may be aware of the PPT configuration based on step 720a. In such embodiments, step 720b may be skipped.
  • steps 720c and 720d BS 112 provides the PPT configuration to UE 101 as either an SIB or as an RRC message, respectively.
  • the PPT configuration may be provided both as a SIB and an RRC message. In some embodiments, only one will be used and the step corresponding to the other option will be skipped.
  • UE 101 may transition to the disconnected mode and may perform step 730 to monitor the downlink channel between UE 101 and communication NW 100 for the PPT. As shown in Fig. 9, the PPT may then be provided by BS 112 either directly to UE 101 or indirectly starting at LMF 139 to BS 112 or starting at LMF 139 via AMF 131 to BS 112.
  • UE 101 may perform step 740, i.e. , perform a positioning procedure to determine the position of UE 101 relative to BS 112.
  • Fig. 9 merely provides an example of the performance of various steps and sub-steps of UE positioning configuration method 700 by the various nodes of communication NW 100 and UE 101. It will be understood that the various steps and sub-steps of UE positioning configuration method 700 may be performed by other nodes of communication NW 100 as required by the actual implementation of the PPT.
  • a method for configuring a positioning procedure at a UE in a disconnected mode may comprise the steps of monitoring, during the disconnected mode, a downlink channel between an access node of a cellular network and the UE for a positioning procedure trigger, PPT and, upon receipt of a PPT, performing a positioning procedure based on the PPT.
  • PPT downlink control information
  • at least a part of the PPT may be included in a downlink control information (DCI) message.
  • DCI downlink control information
  • the DCI message may be at least one of a paging early indication (PEI) DCI message and a paging DCI.
  • PEI paging early indication
  • At least a part of the PPT may be included in a paging message.
  • the PPT may indicate at least one of a positioning request, a type of the positioning request, wherein the type of positioning request indicates one of a UE-based positioning request or a UE-assisted positioning request, a positioning method type and recipient information, wherein the recipient information indicates one of a group of UEs or an individual UE.
  • the group of UEs may be selected based on a selection rule or selected randomly.
  • the positioning request of the PPT may be included in a downlink control information (DCI) message.
  • DCI downlink control information
  • the recipient information may be included in a downlink control information (DCI) message.
  • DCI downlink control information
  • the recipient information may further be included in a paging message.
  • the type of the positioning request and the positioning method type may be included in one of a downlink control information (DCI) message and a paging message.
  • DCI downlink control information
  • the method may further comprise the step of providing, to a monitoring node of the cellular network, a UE capability information message, the UE capability information message indicating at least a capability to receive the PPT during the disconnected mode.
  • the UE capability information message may further indicate at least one of one or more positioning procedures supported by the UE and a downlink control information (DCI) message receivable by the UE.
  • DCI downlink control information
  • the monitoring node may be one of an access node and a mobility control node of the cellular network.
  • the method may further comprise the step of obtaining, from the cellular network during a connected mode, a PPT configuration message, the PPT configuration message configuring the UE to monitor the downlink channel for the PPT during the disconnected mode.
  • the PPT configuration message may be based on the UE capability information.
  • the PPT configuration message may further define a structure of the PPT, the structure indicating at least a downlink control information (DCI) message including at least a part of the PPT.
  • DCI downlink control information
  • the structure may further indicate a paging message including at least a part of the PPT.
  • the PPT configuration message may be part of one of a system information block (SIB) or a radio resource control (RRC) message.
  • SIB system information block
  • RRC radio resource control
  • the performing of the positioning procedure may comprise transmitting or receiving reference signals for positioning during the disconnected mode.

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

Abstract

La présente demande concerne un procédé de configuration d'une procédure de positionnement au niveau d'un équipement utilisateur, UE, dans un mode déconnecté. Le procédé comprend les étapes consistant à surveiller, pendant le mode déconnecté, un canal de liaison descendante entre un nœud d'accès d'un réseau cellulaire et l'UE pour un déclencheur de procédure de positionnement, PPT, et, lors de la réception d'un PPT, à effectuer une procédure de positionnement sur la base du PPT.
PCT/EP2023/072078 2022-08-09 2023-08-09 Positionnement d'ue en mode déconnecté WO2024033426A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9282428B1 (en) * 2010-06-23 2016-03-08 Marvell International Ltd. Positioning request in paging messages of wireless communication systems
WO2021179323A1 (fr) * 2020-03-13 2021-09-16 北京小米移动软件有限公司 Procédé et appareil de traitement d'informations, dispositif de communication, et support de stockage
WO2022020059A1 (fr) * 2020-07-23 2022-01-27 Qualcomm Incorporated Activation de positionnement d'équipement utilisateur par radiomessagerie

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US9282428B1 (en) * 2010-06-23 2016-03-08 Marvell International Ltd. Positioning request in paging messages of wireless communication systems
WO2021179323A1 (fr) * 2020-03-13 2021-09-16 北京小米移动软件有限公司 Procédé et appareil de traitement d'informations, dispositif de communication, et support de stockage
WO2022020059A1 (fr) * 2020-07-23 2022-01-27 Qualcomm Incorporated Activation de positionnement d'équipement utilisateur par radiomessagerie

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Title
3GPP SPECIFICATION TS 38.212
3GPP SPECIFICATION TS 38.331
3GPP TS 23.501
3GPP TS 36.305
3GPP TS 38.212
SONY: "Considerations on potential positioning enhancements", vol. RAN WG2, no. Online meeting; 20210125 - 20210205, 14 January 2021 (2021-01-14), XP051972749, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG2_RL2/TSGR2_113-e/Docs/R2-2100916.zip R2-2100916_Pos_Tech_1.0.docx> [retrieved on 20210114] *
XIAOMI: "Potential positioning enhancements", vol. RAN WG1, no. e-Meeting; 20201026 - 20201113, 1 November 2020 (2020-11-01), XP052349441, Retrieved from the Internet <URL:https://ftp.3gpp.org/tsg_ran/WG1_RL1/TSGR1_103-e/Docs/R1-2008083.zip R1-2008083 Positioning.docx> [retrieved on 20201101] *

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