EP4275414A1 - Positionnement dans des réseaux de communication cellulaire - Google Patents

Positionnement dans des réseaux de communication cellulaire

Info

Publication number
EP4275414A1
EP4275414A1 EP21844696.1A EP21844696A EP4275414A1 EP 4275414 A1 EP4275414 A1 EP 4275414A1 EP 21844696 A EP21844696 A EP 21844696A EP 4275414 A1 EP4275414 A1 EP 4275414A1
Authority
EP
European Patent Office
Prior art keywords
inactive state
user equipment
measurement
positioning
measurement report
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP21844696.1A
Other languages
German (de)
English (en)
Inventor
Oana-Elena Barbu
Benny Vejlgaard
Johannes Harrebek
Simon Svendsen
Amir Mehdi AHMADIAN TEHRANI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Technologies Oy
Original Assignee
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 Technologies Oy filed Critical Nokia Technologies Oy
Publication of EP4275414A1 publication Critical patent/EP4275414A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • G01S5/0009—Transmission of position information to remote stations
    • G01S5/0018—Transmission from mobile station to base station
    • G01S5/0036—Transmission from mobile station to base station of measured values, i.e. measurement on mobile and position calculation on base station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • Various example embodiments relate in general to cellular communication networks and more specifically, to positioning in such networks.
  • Performance of cellular communication networks may be improved by exploiting known, or predicted, locations of User Equipments, UEs.
  • UEs User Equipments
  • a network can optimize its resource usage for example.
  • many applications require, and/or benefit from, accurate tracking of positions of the UEs, especially the high speed UEs.
  • Tracking of positions of UEs is thus important in cellular communication networks, such as in networks operating according to Long Term Evolution, LTE, and/or 5G radio access technology.
  • 5G radio access technology may also be referred to as New Radio, NR, access technology.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • 3GPP also develops standards for 5G/NR.
  • Topics of the 3GPP discussions include network efficiency and positioning. According to the discussions there is a need to provide improved methods, apparatuses and computer programs for positioning. Such improvements may be used in other cellular communication networks in the future as well.
  • an apparatus comprising means for means for transmitting an inactive state measurement request to a user equipment, to request the user equipment to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report upon switching from the inactive state to a connected state, means for receiving the inactive state measurement report from the user equipment, wherein the inactive state measurement report comprises information about the at least one positioning measurement performed by the user equipment when the user equipment was in the inactive state, means for generating, based at least on said information about the at least one positioning measurement performed by the user equipment, a mobility profile of the user equipment and means for transmitting the mobility profile of the user equipment to a base station serving the user equipment.
  • the apparatus of the first aspect may comprise a location management entity or means for controlling the location management entity.
  • an apparatus comprising means for means for receiving an inactive state measurement request to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report after a user equipment has switched from the inactive state to a connected state, means for performing, upon receiving the inactive state measurement request, the at least one positioning measurement when the user equipment is in the inactive state and means for transmitting an inactive state measurement report upon switching to the connected state, the inactive state measurement report comprising information about the at least one positioning measurement performed by the user equipment.
  • the apparatus of the second aspect may comprise the user equipment or means for controlling the user equipment.
  • a first method comprising transmitting an inactive state measurement request to a user equipment, to request the user equipment to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report upon switching from the inactive state to a connected state, receiving the inactive state measurement report from the user equipment, wherein the inactive state measurement report comprises information about the at least one positioning measurement performed by the user equipment when the user equipment was in the inactive state, generating, based at least on said information about the at least one positioning measurement performed by the user equipment, a mobility profile of the user equipment and transmitting the mobility profile of the user equipment to a base station serving the user equipment.
  • a second method comprising receiving an inactive state measurement request to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report after a user equipment has switched from the inactive state to a connected state, performing, upon receiving the inactive state measurement request, the at least one positioning measurement when the user equipment is in the inactive state and transmit an inactive state measurement report upon switching to the connected state, the inactive state measurement report comprising information about the at least one positioning measurement performed by the user equipment.
  • an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to perform, transmit an inactive state measurement request to a user equipment, to request the user equipment to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report upon switching from the inactive state to a connected state, receive the inactive state measurement report from the user equipment, wherein the inactive state measurement report comprises information about the at least one positioning measurement performed by the user equipment when the user equipment was in the inactive state, generate, based at least on said information about the at least one positioning measurement performed by the user equipment, a mobility profile of the user equipment and transmit the mobility profile of the user equipment to a base station serving the user equipment.
  • the apparatus of the fifth aspect may comprise a location management entity or means for controlling the location management entity.
  • an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to perform, receive an inactive state measurement request to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report after a user equipment has switched from the inactive state to a connected state, perform, upon receiving the inactive state measurement request, the at least one positioning measurement when the user equipment is in the inactive state and transmit an inactive state measurement report upon switching to the connected state, the inactive state measurement report comprising information about the at least one positioning measurement performed by the user equipment.
  • the apparatus of the sixth aspect may comprise the user equipment or means for controlling the user equipment.
  • a non-transory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least perform the first method.
  • a non-transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least perform the second method.
  • a computer program comprising instructions which, when the program is executed by an apparatus, cause the apparatus to carry out the first method.
  • a computer program comprising instructions which, when the program is executed by an apparatus, cause the apparatus to carry out the second method.
  • FIGURE 1 illustrates a communication network in accordance with at least some example embodiments
  • FIGURE 2 illustrates a signalling graph in accordance with at least some example embodiments
  • FIGURE 3 illustrates an apparatus capable of supporting at least some example embodiments
  • FIGURE 4 illustrates a flow graph of a first method in accordance with at least some example embodiments
  • FIGURE 5 illustrates a flow graph of a second method in accordance with at least some example embodiments.
  • Positioning in cellular communication systems may be improved by the procedures described herein. More specifically, a User Equipment, UE, may perform at least one positioning measurement even if the UE would be in an inactive state. The UE may perform the at least one positioning measurement responsive to receiving an inactive state measurement request, e.g., from a location management entity. Thus, the location management entity may control how the at least one positioning measurement, if even needed, is performed in the inactive state by the UE. Upon switching to a connected state, the UE may then transmit, to a location management entity, an inactive state measurement report comprising information about the at least one positioning measurement performed by the UE.
  • an inactive state measurement report comprising information about the at least one positioning measurement performed by the UE.
  • the location management entity may generate, or update, a mobility profile of the UE by taking into account said information about the at least one positioning measurement performed by the UE in the inactive state.
  • the mobility profile may be further transmitted to a Base Station, BS, so that the BS can take actions accordingly.
  • BS Base Station
  • FIGURE 1 illustrates a communication network in accordance with at least some example embodiments.
  • the example communication network of FIGURE 1 may comprise UE 110, first BS 120, second BS 130 and core network 140. If cell reselection or handover of UE 110 is needed due to movement of UE 110, first BS 120 may be referred to as a source BS while second BS 130 may be referred to as a target BS. However, in some example embodiments, first BS 120 and second BS 130 may be the same, if cell reselection and handover are not needed due to movement of UE 110.
  • Positions of UE 110 at different time instants are denoted by points 102, 104, 106 and 108 in FIGURE 1.
  • UE 110 may be located at point 102 before the cell reselection and be in the connected state with first BS 120 via air interface 115. Then, UE 110 may start moving from point 102 towards second BS 130 via points 104 and 106. At point 108, UE 110 may have performed the cell reselection. Thus, at point 108, UE 110 may be in the connected state with second BS 130 via air interface 125. At points 104 and 106, UE 110 may be in the inactive state.
  • First BS 120 and second BS 130 may be connected to each other directly via wired interface 135, such as a X2 or Xn interface.
  • First BS 120 and second BS 130 may be connected, directly or via at least one intermediate node, with core network 140 as well.
  • Core network 140 may be, in turn, coupled via wired interface 145 with another network (not shown in FIGURE 1), via which connectivity to further networks may be obtained, for example via a worldwide interconnection network.
  • UE 110 may comprise or be attached to, for example, a smartphone, a cellular phone, a Machine-to-Machine, M2M, node, Machine-Type Communications node, MTC, an Internet of Things, IoT, node, a car telemetry unit, a laptop computer, a tablet computer or, indeed, any kind of suitable mobile wireless terminal or station.
  • first BS 120 may be considered as a serving BS for UE 110 before the cell reselection, at least in the connected state at point 102
  • second BS 130 may be considered as a serving BS for UE 110 after the cell reselection, at least in the connected state at point 108.
  • Air interface 115 between UE 110 and first BS 120 may be configured in accordance with a first Radio Access Technology, RAT, which UE 110 and first BS 120 are configured to support, and UE 110 may communicate with first BS 120 via air interface 115 using the first RAT before the cell reselection.
  • air interface 125 between UE 110 and second BS 130 may be configured in accordance with a second RAT, which UE 110 and second BS 130 are configured to support, and UE 110 may communicate with second BS 130 via air interface 125 using the second RAT after the cell reselection.
  • the first RAT and the second RAT may, or may not, be the same.
  • Examples of cellular RATs include Long Term Evolution, LTE, New Radio, NR, which may also be known as fifth generation, 5G, radio access technology and MulteFire.
  • LTE Long Term Evolution
  • NR New Radio
  • 5G fifth generation
  • MulteFire fifth generation
  • a BS may be referred to as eNB
  • gNB fifth generation
  • example embodiments are not restricted to any particular wireless technology. Instead, example embodiments may be exploited in any cellular communication network wherein it is desirable to enhance positioning.
  • positioning may be used to improve performance of a communication network.
  • positioning information of UEs may be exploited at least to improve for network efficiency.
  • the network can optimize its resource usage. For instance, resource allocation may be optimized by predicting future position(s) of UE 110, which allows first BS 120 and/or second BS 130 to adapt for example a modulation and coding scheme, bandwidth and/or numerology to channel and cell load conditions.
  • a carrier frequency offset may be pre-compensated by utilizing positioning information of UE 110.
  • Positioning information of UE 110 may be referred to as information about positioning measurements performed by UE 110, such as time-of- arrival, a strength of a received signal and/or an angle-of-arrival of reference signals.
  • Positioning information may also be used for interference, handover and cell reselection management.
  • many applications require and/or benefit from accurate tracking of the position of UEs, especially the high speed UEs. There is therefore a need to ensure accurate positioning in cellular communication networks in general.
  • a UE in the inactive state is typically not able to process and report information about positioning measurements, such as information about measurements of positioning reference signals, as there are no means for scheduling the reporting for UEs in the inactive state.
  • the accuracy of positioning of a UE in the inactive state would be degraded.
  • the position may change drastically during the inactive state and hence the tracking of the position of such UEs needs to be improved to avoid compromising subsequent resource optimization, for example at second BS 130 in case of cell reselection.
  • the inactive state may refer to the Radio Resource Control, RRC
  • the connected state may refer to the RRC connected state, at least in case of 3rd Generation Partnership Project, 3GPP, standards.
  • Example embodiments of the present invention therefore enhance tracking of positions of UEs by improving accuracy of positioning for UEs which switch from the inactive state to the connected state. Mobility management may be thus improved by enhancing tracking of positions of UEs in the inactive state.
  • the inactive state is a state between the idle mode and the connected state, to reduce signalling load and creation/cancellation of tunnels between a radio network, comprising for example first BS 120 and second BS 130, and core network 140.
  • a radio network comprising for example first BS 120 and second BS 130, and core network 140.
  • a radio network comprising for example first BS 120 and second BS 130, and core network 140.
  • logical signalling link and tunnel of a UE to the core network are kept in place but the connection of the UE to the radio network is released.
  • UE 110 may report to the network a history of its past positions during the last inactive period, i.e., when UE 110 was in the inactive state at points 104 and 106 in FIGURE l.
  • UE 110 may report the history ofits past positions by transmitting an inactive state measurement report comprising information about at least one positioning measurement, which it has performed in the inactive state.
  • UE 110 may transmit the inactive state measurement report upon awakening from the inactive state, i.e., upon switching from the inactive state to the connected state.
  • a location management entity such as a Location Management Function, LMF, in core network 140, may use said information about the at least one positioning measurement in the inactive state measurement report to generate a Mobility Profile, MProf, of UE 110.
  • the LMF may for example generate the MProf of UE 110 by updating a previous MProf of UE 110 according to said information about the at least one positioning measurement.
  • Information about a positioning measurement may for example comprise at least one of a time stamp indicating when the measurement was performed (time-of-arrival), a strength of a received signal (Reference Signal Received Power, RSRP), an angle-of-arrival and an indication about a measured cell- specific reference signal (Synchronization Signal Block, SSB).
  • the LMF in core network 140 may for example compute and update the MProf of UE 110.
  • the MProf may consist of a set of parameters characterizing mobility pattern of UE 110, e.g., speed, direction of movement, acceleration, etc. These parameters may be obtained via UE 110 itself (UE 110 may, e.g., report sensor information) or estimated using the channel state information and past position estimates via a serving BS.
  • the LMF may then transmit the MProf of UE 110 to second BS 130.
  • the MProf of UE 110 computed from the inactive state measurement report, may then be used by second BS 130, to predict direction of movement, future positions and velocity of UE 110, e.g., during the current Radio Resource Control, RRC, connected window.
  • the MProf of UE 110 may define displacement of UE 110 between two time instances, such as points 102 and 108 in FIGURE 1, depending on velocity of UE 110 and acceleration vector. For instance, an inactive period of 2.5s in the connected state at 500 km/h uniform movement equals a travelled distance of 350 m.
  • the MProf of UE 110 may be used by second SB 130 for enhanced mobility management (e.g. RA and predicted carrier frequency offset for potential pre-compensation).
  • Example embodiments of the present invention may be used for example to enhance LTE Positioning Protocol, LPP, and New Radio Positioning Protocol Annex, NRPPa, positioning protocols, to make it possible for UE 110 to report information about positioning measurements performed in the inactive state for example on SSBs.
  • SSBs are cell-specific reference signals which first BS 120 and second BS 130 may broadcast to enable UEs in the network to perform beam selection and periodic realignments.
  • Typical usage of SSBs at UEs consists of periodic measurements of the RSRPs of SSBs of all detectable BSs and reporting the indices of the best SSBs back to a serving BS.
  • the usage of SSBs may be extended to tracking positions of UE 110.
  • FIGURE 2 illustrates a signalling graph in accordance with at least some example embodiments.
  • UE 110 On the vertical axes are disposed, from the left to the right, UE 110, first BS 120 (BS1), second BS 130 (BS2) and the LMF in core network 140 of FIGURE 1. Time advances from the top towards the bottom.
  • BS1 first BS 120
  • BS2 second BS 130
  • LMF in core network 140 Time advances from the top towards the bottom.
  • the steps of the LMF may be performed by any location management entity in general.
  • the LMF in core network 140 may determine that UE 110 needs to perform at least one positioning measurement in the inactive state.
  • the LMF may thus evaluate whether UE 110 needs position tracking for inactive-mode periods, i.e., evaluate positioning related requirements of UE 110, or a user of UE 110.
  • Said determination at step 202 may be based on at least one of a type of UE 110 (obtained from the e.g. vehicular, Hot, etc), a location accuracy requirement (application dependent), location integrity requirement (application dependent) and a previous MProf of UE 110.
  • the accuracy and latency of positioning may be dictated by a service that requests positioning in the first place. So, for example, robots in a factory may need to be localized very often and very accurately.
  • virtual reality and extended reality applications may also have high accuracy and latency requirements.
  • a BS may know types of UEs that it is serving and can estimate the UE mobility (e.g. Doppler estimation, channel state information reports). Based on this information, the serving BS may decide how often the mobility profiles of the UEs it serves need to be updated. Note that the BS may use implicitly this type of approach for RRM, handover or cell reselection purposes.
  • the LMF in core network 140 may transmit an inactive state measurement request to UE 110, to request UE 110 to perform at least one positioning measurement in the inactive state and transmit an inactive state measurement report comprising information about the at least one positioning measurement performed by UE 110 when UE 110 was in the inactive state.
  • the LMF may for example transmit the inactive state measurement request upon determining that the evaluation result is positive at step 202, i.e., upon determining that UE 110 needs to perform positioning measurements in the inactive state.
  • the LMF may configure UE 110 using the inactive state measurement request.
  • the inactive state measurement request may comprise at least one indication of a measurement rate, a location of at least one cell-specific reference signal for performing the at least one position measurement and a duration of positioning measurements within an inactive period.
  • the measurement rate may refer to performing and collecting measurements at a given rate R, i.e., how often the positioning measurements are collected, for example by measuring a certain SSB. If UE 110 is static or moving very slow, the LMF may configure a low rate since it does not expect that the positioning measurements would change significantly over short period of time. Thus, performance may be optimized as unnecessary measurements are avoided.
  • the LMF may avoid unnecessary measurements by transmitting the indication about the location of at least one cell-specific reference signal for performing the at least one position measurement.
  • the indication about the location of at least one cell-specific reference signal may refer to SSB position measurements on a certain SSB resource (time/frequency resource), e.g., time-of-arrival and/or angle-of-arrival in addition to RSRP.
  • the LMF may configure a subset of best cell-specific reference signals.
  • the LMF may avoid unnecessary measurements by transmitting the indication about a duration of positioning measurements within an inactive period.
  • the LMF may determine that UE 110 does not need to perform measurements all the time while UE 110 is in the inactive state. For example, if it is predicted that the route of UE 110 is known in the beginning of the inactive state (e.g., UE 110 is in a train), there may be no need to perform measurements in the beginning of the inactive state.
  • the connected state may be resumed upon request from upper layers, and initiated by either UE 110 or a BS.
  • UE 110 may transmit a resource allocation request to first BS 120, and/or possibly to second BS 130 if known, for example to request first BS 120 to allocate resources in the next, first Atime slots upon switching from the inactive state to the connected state.
  • the resource allocation request may be transmitted to request allocation of resources for transmission of the inactive state measurement report.
  • the LMF may transmit the resource allocation request to first BS 120 and/or second BS 130, for example over NRPPa, in a message exchange transparent to UE 110.
  • the resource allocation request comprises an inactive state tracking flag, an indication about a size of an expected inactive state measurement report (payload of the inactive state measurement report) and/or an urgency flag (i.e. how soon after awakening the UE needs to report the inactive state measurement report.
  • the size of the expected inactive state measurement report may be used for allocating resources properly for transmission of the inactive state measurement report by first BS 120 and/or second BS 130.
  • the size of the expected inactive state measurement report can be taken into account when allocating resources, it may be ensured that with high probability the report fits to the allocated resource and hence unnecessary signalling can be avoided, because one transmission is enough. At the same, there is no need to allocate resources excessively.
  • the mapping between the flag index and the supported delay may be agreed between the LMF, UE 110 and the serving BS beforehand.
  • the urgency flag indicates to a BS how long UE 110 can delay the transmission of the report. Based on this flag, the BS may allocate resources to the UE to send this report.
  • first BS 120 may grant the resource allocation request and inform UE 110 about a resource, such as a random access resource, for transmission of the inactivity report upon switching from the inactivity mode to the connected state. For instance, first BS 120 may configure the resource for transmission of the inactivity report and transmit a reconfiguration in an RRC message, e.g., by setting pointers to a start and end of a transmission slot.
  • UE 110 may, at steps 202 - 208, be in connected state with first BS 120, and switch to inactive state after step 208.
  • first BS 102 may transmit an indication about UE 110, which has switched to the inactive state from the connected state, to the LMF.
  • the indication about UE 110 may be transmitted over a backhaul link, such as interface 135 in FIGURE 1, using NRPPa protocol for example.
  • UE 110 which has switched to the inactive state from the connected state may be decided by the LMF and indicated to first BS 120 before step 210.
  • the indication may refer to a set of UEs and the LMF may indicate the set periodically to first BS 120, and possibly to second BS 130 as well.
  • UE 110 may, upon receiving the inactive state measurement request, perform positioning measurement according to the inactive measurement report request. That is to say, UE 110 may perform positioning measurement in the inactive state according to the measurement rate, the measurement duration and/or the location of at least one cell-specific reference signal for performing the at least one position measurement, i.e., on an indicated SSB. While being in the inactive state, UE 110 may listen to at least one cell-specific reference signal, such as beam management signals like SSBs, from all available BSs. For instance, UE 110 may perform the requested at least one positioning measurement on a detected SSB.
  • SSB beam management signals
  • Positioning measurements on SSBs may comprise measuring at least one of a time-of-arrival, a strength of a received signal and/or an angle- of-arrival of the best SSBs in the given SSB burst, as indicated by the LMF.
  • a FIFO storage may be utilized at UE 110 to compensate memory limitations of UE 110. As such, UE 110 does not have to store positioning measurements indefinitely since they will become deprecated after a period of time proportional to mobility, e.g., velocity, of UE 110.
  • the size of the FIFO storage may be dimensioned according to the UE type of UE 110 for example. Each measurement may be logged by UE 110 in the inactive measurement report in a FIFO list like below:
  • UE 110 may generate the inactive state measurement report by adding information about the at least positioning measurement performed by UE 110 to the inactive state measurement report.
  • said information about the at least one positioning measurement may comprise a time-of-arrival, a strength of a received signal, an angle-of-arrival and/or an indication of the measured cell-specific reference signal.
  • UE 110 may be in the inactive state and switch to the connected state after step 214.
  • UE 110 may transmit the inactive state measurement report to the LMF, wherein the inactive state measurement report comprises said information about the at least one positioning measurement performed by UE 110 when UE 110 was in the inactive state (steps 210 - 214).
  • the inactive state measurement report comprises said information about the at least one positioning measurement performed by UE 110 when UE 110 was in the inactive state (steps 210 - 214).
  • UE 110 may report to the LMF, possibly via second BS 130, the inactive state measurement report comprising a list of positioning measurements on SSBs collected by UE 110 while UE 110 was in the inactive state.
  • UE 110 may transmit an inactive state measurement report table, upon switching from inactive state to connected state, using the resource allocated and indicated at step 208.
  • UE 110 may transmit the inactive state measurement report by appending the report to a standard positioning report as configured by the serving BS during LPP.
  • the report may be sent via the serving BS over a regular control channel but it is transparent to the serving BS, because the serving BS acts as a relay to the LMF.
  • the LMF in core network 140 may generate, or update, the MProf of UE 110 at step 218.
  • the MProf of UE 110 may comprise information about expected current and future displacements of UE 110, based on for example an estimated velocity and acceleration vectors.
  • the LMF may transmit the generated, or updated, MProf of UE 110 to second BS 130, i.e., to the BS serving UE 110 in connected state after UE 110 has switched from the inactive state to the connected state.
  • the generated, or updated, MProf of UE 110 may be transmitted to second BS 130 to be used in mobility management for the next Y slots of RRC connected state.
  • the LMF may also convey to BS 130 a list of predicted positions of UE 110 for the future Y slots.
  • the generated, or updated, MProf of UE 110 may be transmitted over NRPPa.
  • second BS 130 may use the MProf of UE 110 for enhanced mobility management.
  • FIGURE 3 illustrates an apparatus capable of supporting at least some example embodiments. Illustrated is device 300, which may comprise, for example, the LMF in core network 140 or UE 110, or a device controlling functioning thereof.
  • processor 310 which may comprise, for example, a single- or multi-core processor wherein a single-core processor comprises one processing core and a multi -core processor comprises more than one processing core.
  • Processor 310 may comprise, in general, a control device.
  • Processor 310 may comprise more than one processor.
  • Processor 310 may be a control device.
  • a processing core may comprise, for example, a Cortex-A8 processing core manufactured by ARM Holdings or a Steamroller processing core produced by Advanced Micro Devices Corporation.
  • Processor 310 may comprise at least one Qualcomm Snapdragon and/or Intel Atom processor.
  • Processor 310 may comprise at least one Application-Specific Integrated Circuit, ASIC.
  • Processor 310 may comprise at least one Field-Programmable Gate Array, FPGA.
  • Processor 310 may be means for performing method steps in device 300.
  • Processor 310 may be configured, at least in part by computer instructions, to perform actions.
  • a processor may comprise circuitry, or be constituted as circuitry or circuitries, the circuitry or circuitries being configured to perform phases of methods in accordance with example embodiments described herein.
  • circuitry may refer to one or more or all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of hardware circuits and software, such as, as applicable: (i) a combination of analog and/or digital hardware circuit(s) with software/firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit(s) and or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
  • firmware firmware
  • 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.
  • Device 300 may comprise memory 320.
  • Memory 320 may comprise random- access memory and/or permanent memory.
  • Memory 320 may comprise at least one RAM chip.
  • Memory 320 may comprise solid-state, magnetic, optical and/or holographic memory, for example.
  • Memory 320 may be at least in part accessible to processor 310.
  • Memory 320 may be at least in part comprised in processor 310.
  • Memory 320 may be means for storing information.
  • Memory 320 may comprise computer instructions that processor 310 is configured to execute. When computer instructions configured to cause processor 310 to perform certain actions are stored in memory 320, and device 300 overall is configured to run under the direction of processor 310 using computer instructions from memory 320, processor 310 and/or its at least one processing core may be considered to be configured to perform said certain actions.
  • Memory 320 may be at least in part comprised in processor 310. Memory 320 may be at least in part external to device 300 but accessible to device 300.
  • Device 300 may comprise a transmitter 330.
  • Device 300 may comprise a receiver 340.
  • Transmitter 330 and receiver 340 may be configured to transmit and receive, respectively, information in accordance with at least one cellular or non-cellular standard.
  • Transmitter 330 may comprise more than one transmitter.
  • Receiver 340 may comprise more than one receiver.
  • Transmitter 330 and/or receiver 340 may be configured to operate in accordance with Global System for Mobile communication, GSM, Wideband Code Division Multiple Access, WCDMA, 5G, Long Term Evolution, LTE, IS-95, Wireless Local Area Network, WLAN, Ethernet and/or Worldwide Interoperability for Microwave Access, WiMAX, standards, for example.
  • GSM Global System for Mobile communication
  • WCDMA Wideband Code Division Multiple Access
  • 5G Fifth Generation
  • LTE Long Term Evolution
  • LTE Long Term Evolution
  • IS-95 Wireless Local Area Network
  • WLAN Wireless Local Area Network
  • Ethernet Ethernet
  • WiMAX Worldwide Interoperability for Microwave Access
  • Device 300 may comprise a Near-Field Communication, NFC, transceiver 350.
  • NFC transceiver 350 may support at least one NFC technology, such as Bluetooth, Wibree or similar technologies.
  • Device 300 may comprise User Interface, UI, 360.
  • UI 360 may comprise at least one of a display, a keyboard, a touchscreen, a vibrator arranged to signal to a user by causing device 300 to vibrate, a speaker and a microphone.
  • a user may be able to operate device 300 via UI 360, for example to accept incoming telephone calls, to originate telephone calls or video calls, to browse the Internet, to manage digital files stored in memory 320 or on a cloud accessible via transmitter 330 and receiver 340, or via NFC transceiver 350, and/or to play games.
  • Device 300 may comprise or be arranged to accept a user identity module 370.
  • User identity module 370 may comprise, for example, a Subscriber Identity Module, SIM, card installable in device 300.
  • a user identity module 370 may comprise information identifying a subscription of a user of device 300.
  • a user identity module 370 may comprise cryptographic information usable to verify the identity of a user of device 300 and/or to facilitate encryption of communicated information and billing of the user of device 300 for communication effected via device 300.
  • Processor 310 may be furnished with a transmitter arranged to output information from processor 310, via electrical leads internal to device 300, to other devices comprised in device 300.
  • a transmitter may comprise a serial bus transmitter arranged to, for example, output information via at least one electrical lead to memory 320 for storage therein.
  • the transmitter may comprise a parallel bus transmitter.
  • processor 310 may comprise a receiver arranged to receive information in processor 310, via electrical leads internal to device 300, from other devices comprised in device 300.
  • Such a receiver may comprise a serial bus receiver arranged to, for example, receive information via at least one electrical lead from receiver 340 for processing in processor 310.
  • the receiver may comprise a parallel bus receiver.
  • Device 300 may comprise further devices not illustrated in FIGURE 3.
  • device 300 may comprise at least one digital camera.
  • Some devices 300 may comprise a back-facing camera and a front-facing camera, wherein the back-facing camera may be intended for digital photography and the front- facing camera for video telephony.
  • Device 300 may comprise a fingerprint sensor arranged to authenticate, at least in part, a user of device 300.
  • device 300 lacks at least one device described above.
  • some devices 300 may lack a NFC transceiver 350 and/or user identity module 370.
  • Processor 310, memory 320, transmitter 330, receiver 340, NFC transceiver 350, UI 360 and/or user identity module 370 may be interconnected by electrical leads internal to device 300 in a multitude of different ways.
  • each of the aforementioned devices may be separately connected to a master bus internal to device 300, to allow for the devices to exchange information.
  • this is only one example and depending on the example embodiment various ways of interconnecting at least two of the aforementioned devices may be selected without departing from the scope of the example embodiments.
  • FIGURE 4 illustrates a flow graph of a first method in accordance with at least some example embodiments.
  • the phases of the illustrated first method may be performed by the LMF in core network 140, or by a control device configured to control the functioning thereof, possibly when installed therein.
  • the first method may comprise, at step 410, transmitting an inactive state measurement request to a user equipment, to request the user equipment to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report upon switching from the inactive state to a connected state.
  • the first method may comprise receiving the inactive state measurement report from the user equipment, wherein the inactive state measurement report comprises information about the at least one positioning measurement performed by the user equipment when the user equipment was in the inactive state.
  • the first method may comprise generating, based at least on said information about the at least one positioning measurement performed by the user equipment, a mobility profile of the user equipment.
  • the first method may comprise transmitting the mobility profile of the user equipment to a base station serving the user equipment.
  • FIGURE 5 illustrates a flow graph of a second method in accordance with at least some example embodiments.
  • the phases of the illustrated second method may be performed by UE 110, or by a control device configured to control the functioning thereof, possibly when installed therein.
  • the second method may comprise, at step 510, receiving an inactive state measurement request to perform at least one positioning measurement in an inactive state and to transmit an inactive state measurement report after a user equipment has switched from the inactive state to a connected state.
  • the second method may comprise performing, upon receiving the inactive state measurement request, the at least one positioning measurement when the user equipment is in the inactive state.
  • the second method may comprise transmitting an inactive state measurement report upon switching to the connected state, the inactive state measurement report comprising information about the at least one positioning measurement.
  • an apparatus such as, for example, the LMF in core network 140 or UE 110, or a control device configured to control the functioning thereof, may comprise means for carrying out the example embodiments described above and any combination thereof.
  • a computer program may be configured to cause a method in accordance with the example embodiments described above and any combination thereof.
  • a computer program product embodied on a non-transitory computer readable medium, may be configured to control a processor to perform a process comprising the example embodiments described above and any combination thereof.
  • an apparatus such as, for example the LMF in core network 140 or UE 110, or a control device configured to control the functioning thereof, may comprise at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to perform the example embodiments described above and any combination thereof.
  • At least some example embodiments find industrial application in cellular communication networks, such as in 5G/NR networks, wherein it is desirable to improve tracking of positions of UEs.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un aspect donné à titre d'exemple de la présente invention, l'invention concerne un appareil qui comprend des moyens pour transmettre une demande de mesure d'état inactif à un équipement utilisateur afin de demander à l'équipement utilisateur d'effectuer au moins une mesure de positionnement dans un état inactif et de transmettre un rapport de mesure d'état inactif lors de la commutation de l'état inactif à un état connecté, des moyens pour recevoir le rapport de mesure d'état inactif de l'équipement utilisateur, le rapport de mesure d'état inactif comprenant des informations concernant la ou les mesures de positionnement effectuées par l'équipement utilisateur lorsque l'équipement utilisateur était à l'état inactif, des moyens de génération, qui, sur la base d'au moins desdites informations concernant la ou les mesures de positionnement effectuées par l'équipement utilisateur, génèrent un profil de mobilité de l'équipement utilisateur et des moyens pour transmettre le profil de mobilité de l'équipement utilisateur à une station de base desservant l'équipement utilisateur.
EP21844696.1A 2021-01-11 2021-12-22 Positionnement dans des réseaux de communication cellulaire Pending EP4275414A1 (fr)

Applications Claiming Priority (2)

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FI20215023 2021-01-11
PCT/EP2021/087294 WO2022148656A1 (fr) 2021-01-11 2021-12-22 Positionnement dans des réseaux de communication cellulaire

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US10952028B2 (en) * 2018-05-16 2021-03-16 Qualcomm Incorporated Location of a mobile device with wireless access using a user plane location solution
BR112021021991A2 (pt) * 2019-05-02 2021-12-21 Ericsson Telefon Ab L M Método desempenhado por um dispositivo sem fio, método desempenhado por nó de rede, dispositivo sem fio e nó de rede

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