WO2023068990A1 - Mesures dans des réseaux non terrestres basées sur la validité de données d'éphémérides de satellites - Google Patents

Mesures dans des réseaux non terrestres basées sur la validité de données d'éphémérides de satellites Download PDF

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Publication number
WO2023068990A1
WO2023068990A1 PCT/SE2022/050943 SE2022050943W WO2023068990A1 WO 2023068990 A1 WO2023068990 A1 WO 2023068990A1 SE 2022050943 W SE2022050943 W SE 2022050943W WO 2023068990 A1 WO2023068990 A1 WO 2023068990A1
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measurement
network node
ephemeris data
adjustment
node
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PCT/SE2022/050943
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English (en)
Inventor
Ming Li
Muhammad Ali Kazmi
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Telefonaktiebolaget Lm Ericsson (Publ)
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Publication of WO2023068990A1 publication Critical patent/WO2023068990A1/fr

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    • 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
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system

Definitions

  • the present disclosure relates to wireless communications, and in particular, to measurements performed in non-terrestrial networks, e.g., based at least in part on validity of ephemeris data of satellites.
  • the Third Generation Partnership Project (3GPP) has developed and is developing standards for Fourth Generation (4G) (also referred to as Long Term Evolution (LTE)) and Fifth Generation (5G) (also referred to as New Radio (NR)) wireless communication systems.
  • 4G Fourth Generation
  • 5G Fifth Generation
  • Such systems provide, among other features, broadband communication between network nodes, such as base stations and/or satellites, and mobile wireless devices (WD), as well as communication between network nodes and between WDs.
  • Satellite networks could complement mobile networks (i.e., networks associated with wireless communication systems) on the ground by providing connectivity to underserved areas and multicast/broadcast services.
  • 5G is a new generation’s radio access technology intended to serve use cases such as enhanced mobile broadband (eMBB), ultra-reliable and low latency communication (URLLC), and massive Machine Technology Communication (mMTC).
  • eMBB enhanced mobile broadband
  • URLLC ultra-reliable and low latency communication
  • mMTC massive Machine Technology Communication
  • 5G includes an NR access stratum interface and the 5G Core Network (5GC).
  • NR physical and higher layers are reusing parts of the LTE specification.
  • Other components have been added when motivated by new use cases.
  • One such component is the introduction of a sophisticated framework for beam forming and beam management to extend the support of the 3 GPP technologies to a frequency range going beyond 6 GHz.
  • 3GPP Release 17 includes a work item on NR NTN and a study item on NB-IoT and LTE-M support for NTN.
  • a satellite radio access network usually includes the following components:
  • An Earth-based gateway that connects the satellite to a base station or a core network, depending on the choice of architecture
  • Feeder link that refers to the link between a gateway and a satellite
  • Access link or service link, that refers to the link between a satellite and a WD.
  • a satellite may be categorized as low earth orbit (LEO), medium earth orbit (MEO), or geostationary earth orbit (GEO) satellite.
  • LEO low earth orbit
  • MEO medium earth orbit
  • GEO geostationary earth orbit
  • LEO typical heights ranging from 250 - 1,500 km, with orbital periods ranging from 90 - 120 minutes;
  • MEO typical heights ranging from 5,000 - 25,000 km, with orbital periods ranging from 3 - 15 hours;
  • GEO height at about 35,786 km, with an orbital period of 24 hours.
  • Two basic architectures i.e., transparent payload and regenerative payload
  • Transparent payload also referred to as bent pipe architecture
  • the satellite forwards the received signal between the terminal and the network equipment on the ground with only amplification and a shift from uplink frequency to downlink frequency.
  • the transparent payload architecture means that the gNB (i.e., network node) is located on the ground and the satellite forwards signals/data between the gNB (i.e., network node) and the WD
  • the satellite includes on-board processing to demodulate and decode the received signal and regenerate the signal before sending it back to the Earth.
  • the regenerative payload architecture means that the gNB (i.e., network node) is located in the satellite.
  • a satellite network or satellite based mobile network may also be referred to as a non-terrestrial network (NTN).
  • NTN non-terrestrial network
  • a mobile network with base stations (i.e., network nodes) on the group may also be referred to as a terrestrial network (TN) or a non-NTN network.
  • TN terrestrial network
  • a satellite within an NTN may be called as NTN node, NTN satellite or simply a satellite.
  • FIG. 1 shows a typical architecture of a satellite network with bent pipe transponders (i.e., the transparent payload architecture).
  • the gNB i.e., network node
  • the gNB may be integrated in the gateway or connected to the gateway via a terrestrial connection (wire, optic fiber, wireless link).
  • a communication satellite typically generates several beams over a given area.
  • a beam may have a footprint which is usually in an elliptic shape and has traditionally been considered as a cell. However, cells consisting of the coverage footprint of multiple beams are not excluded in the 3 GPP work.
  • the footprint of a beam is also often referred to as a spotbeam. Further, the footprint of a beam may move over the Earth’s surface with the satellite movement or may be earth fixed with a beam pointing mechanism used by the satellite to compensate for the satellite’s motion.
  • the size of a spotbeam depends on the system design, which may range from tens of kilometers to a few thousands of kilometers.
  • LEO or MEO communication system In a LEO or MEO communication system, a large number of satellites deployed over a range of orbits are required to provide continuous coverage across the full globe. Launching a mega satellite constellation is both an expensive and timeconsuming procedure. It is therefore expected that all LEO and MEO satellite constellations for some time will only provide partial earth-coverage. In case of some constellations dedicated to massive Internet of Things (loT) services with relaxed latency requirements, it may not even be necessary to support full earth-coverage. It may be sufficient to provide occasional or periodic coverage according to the orbital period of the constellation.
  • LoT massive Internet of Things
  • a 3 GPP device in radio resource control (RRC) states (e.g., RRC IDLE or RRC INACTIVE state) is required to perform number of procedures including measurements for mobility purposes, paging monitoring, logging measurement results, tracking area update, and search for a new Public Land Mobile Network (PLMN) to mention a few.
  • RRC radio resource control
  • PLMN Public Land Mobile Network
  • a general trend in 3 GPP has been to allow for relaxation of these procedures to prolong device battery life. This trend has been especially pronounced for loT devices supported by reduced capability (e.g., redcap), NB loT and LTE M.
  • propagation delay is an important aspect of satellite communications that is different from the delay expected in a terrestrial mobile system.
  • the round-trip delay may, depending on the orbit height, range from tens of ms in the case of LEO satellites to several hundreds of ms for GEO satellites.
  • the round-trip delays in terrestrial cellular networks are typically below 1 ms.
  • Table 1 Propagation delay for different orbital heights and elevation angles.
  • Propagation delay may also be highly variable due to the high velocity of the LEO and MEO satellites and change in the order of 10 - 100 ps every second, depending on the orbit altitude and satellite velocity.
  • WD(s) may measure signal quality, position, and timing of other satellites (i.e., neighbor satellites), e.g., satellites that can serve and/or communicate with a WD and/or a network node.
  • the other satellites may be treated as (i.e., determined to be) neighbor satellites.
  • Neighbor satellites may be determined/stored/processed as a list of satellites. The list and/or contents of the list may change over time.
  • Ephemeris defines a trajectory of naturally occurring astronomical objects as well as artificial satellites, e.g., in the sky.
  • the ephemeris and/or the trajectory may include position and/or velocity over time.
  • 3GPP Technical Report (TR) 38.821 describes that ephemeris data should be provided to the WD, e.g., to assist with pointing a directional antenna (or an antenna beam) towards the satellite.
  • a WD knowing its own position, e.g., obtained from Global Navigation Satellite System (GNSS), may also use the ephemeris data to calculate correct timing related and/or frequency drifts, e.g., Timing Advance (TA) and Doppler shift.
  • TA Timing Advance
  • Doppler shift Contents of the ephemeris data and procedures on how to provide and update such data have not yet been studied in detail.
  • a satellite orbit can be fully described using six parameters. Exactly which set of parameters is used can be decided by a user, where many different representations are possible. For example, a choice of parameters used often in astronomy is the set (a, a, i, Q, co, t).
  • a semi-major axis “a” and the eccentricity “a” describe the shape and size of the orbit ellipse; the inclination “i,” the right ascension of the ascending node “Q,” and the argument of periapsis “co” determine its position in space.
  • the epoch “t” determines a reference time (e.g., the time when the satellites move through periapsis).
  • FIG. 2 shows typical orbital elements.
  • a two-line element set is a data format encoding a list of orbital elements of an Earth-orbiting object for a given point in time, i.e., the epoch.
  • TLEs use mean motion n and mean anomaly M instead of a and t.
  • a completely different set of parameters is the position and velocity vector (x, y, z, vx, vy, vz) of a satellite, which are sometimes called orbital state vectors. These can be derived from the orbital elements and vice versa since the information they contain is equivalent. All these formulations (and many others) are possible choices for the format of ephemeris data to be used in NTN. Additionally, the ephemeris data may be accompanied with information on possible coverage area, or timing information when the satellite is going to serve a certain geographical area on Earth.
  • NR synchronization signal consists of primary SS (PSS) and secondary SS (S SS).
  • NR physical broadcast channel carries the very basic system information.
  • the combination of SS and PBCH is referred to as SSB in NR.
  • Multiple SSBs are transmitted in a localized burst set. Within an SS burst set, multiple SSBs can be transmitted in different beams. The transmission of SSBs within a localized burst set is confined to a 5 ms window.
  • the set of possible SSB time locations within an SS burst set depends on the numerology which in most cases is uniquely identified by the frequency band.
  • the SSB periodicity can be configured from the value set ⁇ 5, 10, 20, 40, 80, 160 ⁇ ms (where the unit used in the configuration is subframe, which has a duration of 1 ms).
  • a WD does not need to perform measurements with the same periodicity as the SSB periodicity. Accordingly, the SSB measurement time configuration (SMTC) has been introduced for NR.
  • a signaling of SMTC window informs the WD of the timing and periodicity of SSBs that the WD can use for measurements.
  • the SMTC window periodicity can be configured from the value set ⁇ 5, 10, 20, 40, 80, 160 ⁇ ms, matching the possible SSB periodicities.
  • the SMTC window duration can be configured from the value set ⁇ 1, 2, 3, 4, 5 ⁇ ms (where the unit used in the configuration is subframe, which has a duration of 1 ms).
  • measurement gap pattern is used by the WD for performing measurements on cells of non-serving carriers (e.g., inter-frequency, inter-RAT carriers) as well as on cells of the serving carrier in some scenarios, e.g., if the measured signals such as SSB are outside the bandwidth part (BWP) of the serving cell.
  • the WD is scheduled in the serving cell only within the BWP. During the gap the WD cannot be scheduled for receiving/transmitting signals in the serving cell.
  • MGP measurement gap repetition periodicity
  • MGL measurement gap timing advance
  • the measurement gap length is configured to be larger than the SMTC window duration to allow for RF retuning time.
  • Measurement gap time advance is therefore introduced to fine tune the relative position of the measurement gap with respect to the SMTC window.
  • the measurement gap timing advance can be configured from the value set ⁇ 0, 0.25, 0.5 ⁇ ms.
  • the WD may also be configured with multiple MGPs in parallel for performing different measurements in different MGP. This is also called as concurrent MGP.
  • FIG. 3 shows a typical SSB, SMTC window and measurement gap.
  • FIG. 4 shows a typical single MGP in NR.
  • the following are nonlimiting examples of challenges not currently addressed in NTN: moving satellites (resulting in moving cells or switching cells), and long propagation delays.
  • Moving satellites e.g., resulting in moving or switching cells:
  • a LEO satellite may be visible to a WD on the ground only for a few seconds or minutes.
  • the beam/cell coverage is fixed with respect to a geographical location with earth-fixed beams, i.e., steerable beams from satellites ensure that a certain beam covers the same geographical area even as the satellite moves in relation to the surface of the Earth.
  • a LEO satellite has fixed antenna pointing direction in relation to the earth’s surface, e.g., perpendicular to the Earth’s surface, and thus cell/beam coverage sweeps the Earth as the satellite moves.
  • the spotbeam which is serving the WD, may switch every few seconds.
  • the propagation delays in terrestrial mobile systems are usually less than 1 millisecond.
  • the propagation delays in NTN can be much longer, ranging from several milliseconds (LEO) to hundreds of milliseconds (GEO) depending on the altitudes of the spaceborne or airborne platforms deployed in the NTN.
  • SMTC Measurement gap pattern
  • MGP Measurement gap pattern
  • the distances between sender and transmitter may be very long in NTNs and may vary depending on the satellite’s position in relation to the WD.
  • cells in an NTN are typically very large, which means that the difference in satellite-WD propagation delay may differ significantly between two different locations in the same cell, e.g., compared to the SMTC offset and duration parameters.
  • the SSB/CSLRS transmissions from different satellites are synchronized and transmitted at the same time, they will still arrive at WD at different times because of the differences in distance and thus propagation delay.
  • the WD may miss (i.e., unintentionally) the SSB/CSI-RS (Channel State information Reference Signal) measurement window of adjacent satellites in the NTN system, as illustrated in FIG. 5, which shows a typical distance difference between two satellites.
  • SSB/CSI-RS Channel State information Reference Signal
  • FIG. 5 shows a typical distance difference between two satellites.
  • the propagation delay or propagation delay difference information must be considered in the measurement configuration comprising both SMTC and measurement gap pattern (MGP).
  • multiple SMTC configurations may be enabled by introducing different time offsets between the SMTCs in addition to the legacy SMTC configuration, how the time offsets are managed/ signaled is not yet defined.
  • NTN ephemeris For ephemeris, 3GPP RAN2 has agreed that NTN ephemeris is divided into two categories, i.e., serving cell ephemeris and neighbor ephemeris, but how the two categories differ e.g., the required accuracy or signaling impact, has not been described.
  • uSIM Universal Subscriber Identity Module
  • NAS Non-Access Stratum
  • SIB System Information Block
  • RRC Radio Resource Control
  • network i.e., network node
  • network node either can or cannot provide, or update, ephemeris of neighbor satellites. Therefore, at least some network nodes and/or the network cannot accurately determine neighbor information.
  • Some embodiments advantageously provide methods, systems, and apparatuses for a process (e.g., for a WD in NTN such as served by an NTN network node) of adaptively adjusting and/or differentiating measurement requirements (e.g., measurement rate, periodicity, time, etc.), measurement procedures, and/or measurement configurations (e.g., number of SMTC/MG in multi-SMTC/MG configuration) based at least in part on two cases, on condition of two sets of cases:
  • measurement requirements e.g., measurement rate, periodicity, time, etc.
  • measurement procedures e.g., number of SMTC/MG in multi-SMTC/MG configuration
  • Case 1 When a network node (e.g., serving satellite) and/or WD is provided with ephemeris data for neighbor satellites within a predetermined period of time, e.g., a required time frame; or, when the network node (e.g., serving satellite) and/or WD can predict valid ephemeris data for other network nodes, e.g., neighbor satellites, within the predetermined period of time, e.g., the required time frame.
  • the network node e.g., serving satellite
  • the network node may further be provided with WD location information and/or the network node is cable of obtaining/ determining WD location information.
  • the WD location information may comprise, for example, geographical coordinates (e.g., 2-dimensional, 3-dimensional coordinates).
  • the network node may obtain the WD location information autonomously (e.g., by measuring WD transmitted signals) and/or by receiving a message from the WD and/or from another network node.
  • the message may contain the WD location information.
  • Case 2 When network node (e.g., serving satellite) and/or WD is not provided with ephemeris data for neighbor satellites within the required time frame or ephemeris data is invalid. In another example, the serving satellite and/or WD cannot predict valid ephemeris data for other network nodes, e.g., neighbor satellites, within the required time frame. In another example or aspect of Case 2, the WD location may be unknown to the WD and/or cannot be determined by the WD and/or the WD may not be able to determine the WD location.
  • network node e.g., serving satellite
  • WD cannot predict valid ephemeris data for other network nodes, e.g., neighbor satellites, within the required time frame.
  • the WD location may be unknown to the WD and/or cannot be determined by the WD and/or the WD may not be able to determine the WD location.
  • the WD location information is unknown to a network node (e.g., serving satellite) and/or cannot be determined by the network node and/or the network node may not be able to determine the WD location.
  • the WD may not be able to determine its location due to lack of processing resources and/or current memory constraints.
  • the WD may not be able to determine its location due to poor coverage of one or more GNSS satellites used by the WD for determining the WD location, e.g., a parameter such as Signal-to-Noise and Interference Ratio (SINR) and/or Signal-to-Noise Ratio (SNR) of the received signal of the one or more GNSS satellite(s) at the WD is below certain threshold.
  • SINR Signal-to-Noise and Interference Ratio
  • SNR Signal-to-Noise Ratio
  • the WD may acquire System Information (SI) of the neighbor satellites.
  • SI System Information
  • location information e.g., geographical coordinates such as GNSS coordinates
  • a set of measurement configuration parameters comprising one or more of duration, periodicity and numbers in SMTC and/or MGP configurations is adapted or differs based on Case 1 and Case 2.
  • the WD adapts a measurement procedure (e.g., cell search, including measurement rate, measurement period, etc.) based on Case 1 and Case 2.
  • different set of measurement configurations result into different sets of measurement procedures.
  • the WD may not perform measurements and/or may not meet corresponding measurement requirements, e.g., if measurement configuration does not match with the corresponding case (with or w/o ephemeris data of neighbor satellites).
  • the WD may further inform the network node if the WD does not perform or will not perform measurements and/or does not meet corresponding measurement requirements due to mismatch between the measurement configuration and each case (i.e., Case 1 and/or Case 2).
  • switching between different measurement procedures is signaled by network (i.e., the network node) implicitly or explicitly.
  • the WD adaptively measures (e.g., adjusts measurements in a timely manner) for mobility and signaling in NTN, thereby saving power consumption of the WD and overhead of signaling.
  • a network node configured to communicate with a wireless device (WD) in a communication system.
  • the network node comprises processing circuitry configured to trigger the WD to perform an adjustment of at least one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node; and cause at least one of transmission and reception of signaling based on the adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • the processing circuitry is further configured to predict the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, measurement gap timing advance (MGTA).
  • MGL measurement gap length
  • MGRP measurement gap repetition period
  • MGTO measurement gap time offset
  • MGTA measurement gap timing advance
  • the measurement process includes the WD performing measurements on the signaling within a predetermined interval of time.
  • the measurements on the signaling within the predetermine interval of time are performed based on at least one of the adjustment and an adjustment indication transmitted by the network node.
  • the processing circuitry is further configured to cause reception of a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD, determined by the network node, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • a method in a network node configured to communicate with a wireless device (WD) in a communication system comprises triggering the WD to perform an adjustment of at least one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node; and at least one of transmitting and receiving signaling based on the adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • the method further includes predicting the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, measurement gap timing advance (MGTA).
  • MGL measurement gap length
  • MGRP measurement gap repetition period
  • MGTO measurement gap time offset
  • MGTA measurement gap timing advance
  • the measurement process includes the WD performing measurements on the signaling within a predetermined interval of time.
  • the measurements on the signaling within the predetermine interval of time are performed based on at least one of the adjustment and an adjustment indication transmitted by the network node.
  • the method further includes receiving a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD, determined by the network node, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • a wireless device configured to communicate with a network node in a communication system.
  • the WD comprises processing circuitry configured to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node; and cause at least one of transmission and reception of signaling based on the performed adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • the processing circuitry is further configured to predict the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, and measurement gap timing advance (MGTA).
  • MGL measurement gap length
  • MGRP measurement gap repetition period
  • MGTO measurement gap time offset
  • MGTA measurement gap timing advance
  • the measurement process includes the WD performing measurements on the signaling within a predetermined interval of time.
  • the processing circuitry is further configured to perform the measurements on the signaling within the predetermine interval of time based on at least one of the performed adjustment and an adjustment indication received from the network node.
  • the processing circuitry is further configured to cause transmission of a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD, determined by the network node, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • a method in a wireless device (WD) configured to communicate with a network node in a communication system comprising performing an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node; and at least one of transmitting and receiving signaling based on the performed adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • the method further includes predicting the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node.
  • the status of the ephemeris data is at least one of the network node and the WD is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, measurement gap timing advance (MGTA).
  • the measurement process includes the WD performing measurements on the signaling within a predetermined interval of time.
  • the method further includes performing the measurements on the signaling within the predetermine interval of time based on at least one of the performed adjustment and an adjustment indication received from the network node.
  • the method further includes transmitting a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD, determined by the network node, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • FIG. 1 shows a typical architecture of a satellite network with bent pipe transponders
  • FIG. 2 which shows typical orbital elements
  • FIG. 3 shows a typical SSB/SMTC window and measurement gap
  • FIG. 4 shows a typical single MGP in NR
  • FIG. 5 shows a typical distance difference between two satellites
  • FIG. 6 is a schematic diagram of an example network architecture illustrating a communication system according to principles disclosed herein;
  • FIG. 7 is a block diagram of a network node in communication with a wireless device over a wireless connection according to some embodiments of the present disclosure
  • FIG. 8 is a flowchart of an example process in a network node for causing a WD to perform an adjustment according to some embodiments of the present disclosure
  • FIG. 9 is a flowchart of an example process in a wireless device for performing an adjustment according to some embodiments of the present disclosure.
  • FIG. 10 is a flowchart of another example process in a network node for causing a WD to perform an adjustment according to some embodiments of the present disclosure
  • FIG. 11 is a flowchart of another example process in a wireless device for performing an adjustment according to some embodiments of the present disclosure
  • FIG. 12 shows an example multi-SMTC each with a propagation delay, according to some embodiments of the present disclosure.
  • the joining term, “in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • electrical or data communication may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • Coupled may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
  • network node can be any kind of network node comprised in a radio network and NTN which may further comprise any of a satellite, base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g Node B (gNB), evolved Node B (eNB or eNodeB), Master eNB (MeNB), Slave (SeNB), location measurement unit (LMU), integrated access backhaul (IAB) node, Central Unit (e.g. in a gNB), Distributed Unit (e.g.
  • MSR multi-standard radio
  • MSR BS multi-cell/multicast coordination entity
  • AP radio access point
  • TRP transmission reception point
  • RRU Remote Radio Unit
  • RRH Remote Radio Head
  • a core network node e.g., mobile management entity (MME), self-organizing network (SON) node
  • SON self-organizing network
  • a coordinating node positioning node such as E-SMLC, MDT node, MSC, etc.
  • an external node e.g., 3rd party node, a node external to the current network
  • DAS distributed antenna system
  • SAS spectrum access system
  • EMS element management system
  • the network node may also comprise test equipment.
  • radio node used herein may be used to also denote a wireless device (WD) such as a wireless device (WD) or a radio network node.
  • WD wireless device
  • node may refer to a network node and/or WD (or a user equipment (UE)).
  • the term “satellite” may refer to a network node (e.g., gNB) associated with a satellite, a satellite node, an NTN node, node in the space, etc.
  • a network node (e.g., gNB) associated with a satellite may include both a regenerative satellite, where the network node (e.g., gNB) is the satellite payload, i.e., the network node (e.g., gNB) may be integrated with the satellite, or a transparent satellite, where the satellite payload is a relay and the network node (e.g., gNB) is on the ground (i.e., the satellite relays the communication between the network node (e.g., gNB) on the ground and the WD).
  • a satellite may be referred to as a network node.
  • wireless device or a user equipment (UE) are used interchangeably.
  • the WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD).
  • the WD may also be a radio communication device, target device, device to device (D2D) WD, vehicular to vehicular (V2V), machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low-complexity WD, a sensor equipped with WD, Personal Digital Assistant (PDA), Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), an Internet of Things (loT) device, or a Narrowband loT (NB-IOT) device etc.
  • D2D device to device
  • V2V vehicular to vehicular
  • M2M machine to machine communication
  • low-cost and/or low-complexity WD a sensor equipped with WD
  • PDA Personal Digital Assistant
  • Tablet mobile terminals
  • smart phone laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles
  • CPE Customer Premises Equipment
  • LoT Internet of Things
  • radio network node can be any kind of a radio network node which may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
  • RNC evolved Node B
  • MCE Multi-cell/multicast Coordination Entity
  • RRU Remote Radio Unit
  • RRH Remote Radio Head
  • Non-coverage time also known as “non-serving time” or “network unavailability”, or “non-sojourn time” or “non-dwell time” refers to a period of time during which a satellite or gNB cannot serve or communicate or provide coverage to a WD.
  • Another way to interpret availability is that is not about a satellite/network strictly not being able to serve the WD due to lack of coverage but that the WD does not need to measure certain “not likely to be serving cell (satellite via which serving cell is broadcasted)”. In this case, the terminology may still be as in a no-coverage case or different, e.g., “no need to measure”.
  • radio access technology may refer to any RAT, e.g., UTRA, E-UTRA, narrow band internet of things (NB-IoT), WiFi, Bluetooth, next generation RAT, New Radio (NR), 4G, 5G, etc.
  • RAT radio access technology
  • Any of the equipment denoted by the term node, network node or radio network node may be capable of supporting a single or multiple RATs.
  • signal or radio signal used herein can be any physical signal or physical channel. Examples of downlink (DL) physical signals are reference signal (RS) such as PSS, SSS, CSI-RS, Demodulation Reference Signal (DMRS) signals in SS/PBCH block (SSB), discovery reference signal (DRS), Cell specific Reference Signal (CRS), Positioning Reference Signal (PRS).
  • RS downlink
  • SSS SSS
  • CSI-RS Demodulation Reference Signal
  • PRS Positioning Reference Signal
  • RS may be periodic e.g., RS occasion carrying one or more RSs may occur with certain periodicity e.g., 20 ms, 40 ms, etc.
  • the RS may also be aperiodic.
  • Each SSB may carry NR-PSS, NR-SSS and NR-PBCH in four successive symbols.
  • One or multiple SSBs may be transmitted in one SSB burst which is repeated with certain periodicity, e.g., 5 ms, 10 ms, 20 ms, 40 ms, 80 ms and 160 ms.
  • the WD may be configured with information about SSB on cells of certain carrier frequency by one or more SS/PBCH block measurement timing configuration (SMTC) configurations.
  • the SMTC configuration comprising parameters such as SMTC periodicity, SMTC occasion length in time or duration, SMTC time offset with respect to reference time (e.g., serving cell system frame number (SFN)).
  • SMTC occasion(s) may also occur with certain periodicity e.g., 5 ms, 10 ms, 20 ms, 40 ms, 80 ms and 160 ms.
  • uplink (UL) physical signals are reference signal such as SRS, DMRS etc.
  • the term physical channel may refer to any channel carrying higher layer information, e.g., data, control.
  • Examples of physical channels are PBCH, Narrow Band Physical Broadcast Channel (NPBCH), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH), Short Physical Uplink Control Channel (sPUCCH), Short Physical Downlink Shared Channel (sPDSCH), Short Physical Uplink Control Channel (sPUCCH), Short Physical Uplink Shared Channel (sPUSCH), Machine-Type-Communications Physical Downlink Control Channel (MPDCCH), Narrow Band Physical Downlink Control Channel (NPDCCH), Narrow Band Physical Downlink Shared Channel (NPDSCH), Enhanced Physical Downlink Control Channel (E-PDCCH), Physical Uplink Shared Channel (PUSCH), Physical Uplink Control Channel (PUCCH), Narrow Band Physical Uplink Shared Channel (NPUSCH), etc.
  • MPDCCH Physical Downlink Control Channel
  • NPDCCH Narrow Band Physical Downlink Control Channel
  • NPDSCH Narrow Band Physical Downlink Shared Channel
  • E-PDCCH Enhanced Physical Downlink Control Channel
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Up
  • time resource used herein may correspond to any type of physical resource or radio resource expressed in terms of length of time or time units. Examples of time units are ns, ps, ms, seconds, minutes, hours, etc. Examples of time resources are symbol, time slot, subframe, radio frame, Transmission Time Interval (TTI), interleaving time, slot, sub-slot, mini-slot, etc.
  • TTI Transmission Time Interval
  • WCDMA Wide Band Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes.
  • the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, can be distributed among several physical devices.
  • FIG. 6 a schematic diagram of a communication system 10, according to an embodiment, such as a 3 GPP -type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14.
  • the access network 12 comprises a plurality of network nodes 16a, 16b, 16c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 18a, 18b, 18c (referred to collectively as coverage areas 18).
  • Each network node 16a, 16b, 16c is connectable to the core network 14 over a wired or wireless connection 20.
  • a first wireless device (WD) 22a located in coverage area 18a is configured to wirelessly connect to, or be paged by, the corresponding network node 16a.
  • a second WD 22b in coverage area 18b is wirelessly connectable to the corresponding network node 16b. While a plurality of WDs 22a, 22b (collectively referred to as wireless devices 22) are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole WD is in the coverage area or where a sole WD is connecting to the corresponding network node 16.
  • Communication system 10 and/or any component of communication system 10 may be part of an NTN and/or an NTN.
  • access network 12 and/or core network 14 may be an NTN and/or part of an NTN.
  • network node 16 and/or WD 22 may be a satellite, e.g., of an NTN.
  • a WD 22 can be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16.
  • a WD 22 can have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR.
  • WD 22 can be in communication with an eNB for LTE/E-UTRAN and a gNB for NR/NG-RAN.
  • a network node 16 (eNB or gNB) is configured to include a node measurement unit 24 which is configured to cause the WD to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • a wireless device 22 is configured to include a WD measurement unit 26 which is configured to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • the communication system 10 includes a network node 16 provided in a communication system 10 and including hardware 28 enabling it to communicate with the WD 22.
  • the hardware 28 may include a radio interface 30 for setting up and maintaining at least a wireless connection 32 with a WD 22 located in a coverage area 18 served by the network node 16.
  • the radio interface 30 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the radio interface 30 includes an array of antennas 34 to radiate and receive signal(s) carrying electromagnetic waves.
  • the hardware 28 of the network node 16 further includes processing circuitry 36.
  • the processing circuitry 36 may include a processor 38 and a memory 40.
  • the processing circuitry 36 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • the processor 38 may be configured to access (e.g., write to and/or read from) the memory 40, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the memory 40 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the network node 16 further has software 42 stored internally in, for example, memory 40, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection.
  • the software 42 may be executable by the processing circuitry 36.
  • the processing circuitry 36 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16.
  • Processor 38 corresponds to one or more processors 38 for performing network node 16 functions described herein.
  • the memory 40 is configured to store data, programmatic software code and/or other information described herein.
  • the software 42 may include instructions that, when executed by the processor 38 and/or processing circuitry 36, causes the processor 38 and/or processing circuitry 36 to perform the processes described herein with respect to network node 16.
  • processing circuitry 36 of the network node 16 may include a node measurement unit 24 which is configured to cause the WD to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node..
  • the communication system 10 further includes the WD 22 already referred to.
  • the WD 22 may have hardware 44 that may include a radio interface 46 configured to set up and maintain a wireless connection 32 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located.
  • the radio interface 46 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the radio interface 46 includes an array of antennas 48 to radiate and receive signal(s) carrying electromagnetic waves.
  • the hardware 44 of the WD 22 further includes processing circuitry 50.
  • the processing circuitry 50 may include a processor 52 and memory 54.
  • the processing circuitry 50 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • the processor 52 may be configured to access (e.g., write to and/or read from) memory 54, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 54 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the WD 22 may further comprise software 56, which is stored in, for example, memory 54 at the WD 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the WD 22.
  • the software 56 may be executable by the processing circuitry 50.
  • the software 56 may include a client application 58.
  • the client application 58 may be operable to provide a service to a human or non-human user via the WD 22.
  • the processing circuitry 50 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by WD 22.
  • the processor 52 corresponds to one or more processors 52 for performing WD 22 functions described herein.
  • the WD 22 includes memory 54 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 56 and/or the client application 58 may include instructions that, when executed by the processor 52 and/or processing circuitry 50, causes the processor 52 and/or processing circuitry 50 to perform the processes described herein with respect to WD 22.
  • the processing circuitry 50 of the wireless device 22 may include a WD measurement unit 26 which is configured to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • a WD measurement unit 26 which is configured to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • the inner workings of the network node 16 and WD 22 may be as shown in FIG. 7 and independently, the surrounding network topology may be that of FIG. 6.
  • the wireless connection 32 between the WD 22 and the network node 16 is in accordance with the teachings of the embodiments described throughout this disclosure. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc. In some embodiments, a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • FIGS. 6 and 7 show various “units” such as node measurement unit 24 and WD measurement unit 26 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
  • the methods/steps/processes performed/applied by WD 22 as described in the present disclosure are not limited as such and may be applied/performed by the network node 16.
  • the methods/steps/processes performed/applied by network node 16 are as described in the present disclosure are not limited as such and may be applied/performed by WD 22.
  • FIG. 8 is a flowchart of an example process in a network node 16 for causing a WD 22 to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process.
  • One or more blocks described herein may be performed by one or more elements of network node 16 such as by one or more of processing circuitry 36 (including the node measurement unit 24), processor 38, and/or radio interface 30.
  • Network node 16 such as via processing circuitry 36 and/or processor 38 and/or radio interface 30 is configured to cause (Block SI 00) the WD 22 to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node 16.
  • the status of ephemeris data is any one of the network node 16 and the WD22 is one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • the status of ephemeris data is any one of the network node 16 and the WD 22 is one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP. Performing the adjustment is caused at least in part by transmitting the measurement configuration to the WD from the network node.
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD, the network node, and the at least one other network node.
  • Operating at least the signal includes any one of transmitting and receiving the signal.
  • the measurement configuration is a set of measurement configurations
  • the measurement procedure is a set of measuring procedures
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures
  • the performed adjustment is any one of determined by the WD 2 and the network node 16, triggered implicitly, and triggered explicitly.
  • the communication 10 system is a Non-Terrestrial Network (NTN)
  • the network node 16 is an NTN node serving the WD 22
  • the at least one other network node 16 is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • FIG. 9 is a flowchart of an example process in a wireless device 22 for performing an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process according to some embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of wireless device 22 such as by one or more of processing circuitry 50 (including the WD measurement unit 26), processor 52, and/or radio interface 46.
  • Wireless device 22 such as via processing circuitry 50 and/or processor 52 and/or radio interface 46 is configured to perform (Block SI 02) an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node 16.
  • the status of ephemeris data in any one of the network node 16 and the WD 22 is one of provided with and able to predict the ephemeris data for the at least one other network node 16 within a predetermined period of time.
  • the status of ephemeris data is any one of the network node 16 and the WD 22 is one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP.
  • the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD 22, the network node 16, and the at least one other network node 16. Operating at least the signal includes any one of transmitting and receiving the signal.
  • the measurement configuration is a set of measurement configurations
  • the measurement procedure is a set of measuring procedures
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures
  • the performed adjustment is any one of determined by the WD 22 and the network node 16, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN)
  • the network node is an NTN node serving the WD 22
  • the at least one other network node 16 is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • FIG. 10 is a flowchart of an example process in a network node 16 for causing a WD 22 to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process.
  • One or more blocks described herein may be performed by one or more elements of network node 16 such as by one or more of processing circuitry 36 (including the node measurement unit 24), processor 38, and/or radio interface 30.
  • Network node 16 is configured to trigger (Block SI 04) the WD 22 to perform an adjustment of at least one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node; and at least one of transmitting and receiving (Block SI 06) signaling based on the adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD 22 is at least one of provided with and able to predict the ephemeris data for the at least one other network node 16 within a predetermined period of time.
  • the method further includes predicting the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node 16.
  • the status of the ephemeris data is at least one of the network node 16 and the WD 22 is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node 16 within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, measurement gap timing advance (MGTA).
  • MGL measurement gap length
  • MGRP measurement gap repetition period
  • MGTO measurement gap time offset
  • MGTA measurement gap timing advance
  • the measurement process includes the WD 22 performing measurements on the signaling within a predetermined interval of time.
  • the measurements on the signaling within the predetermine interval of time are performed based on at least one of the adjustment and an adjustment indication transmitted by the network node 16.
  • the method further includes receiving a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD 22, determined by the network node 16, triggered implicitly, and triggered explicitly.
  • the communication system 10 is a Non-Terrestrial Network (NTN)
  • the network node 16 is an NTN node serving the WD 22
  • the at least one other network node 16 is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • FIG. 11 is a flowchart of an example process in a wireless device 22 for performing an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process according to some embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of wireless device 22 such as by one or more of processing circuitry 50 (including the WD measurement unit 26), processor 52, and/or radio interface 46.
  • Wireless device 22 such is configured to perform (Block SI 08) an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node 16; and at least one of transmit and receive (Block SI 10) signaling based on the performed adjustment.
  • the status of the ephemeris data is at least one of the network node and the WD 22 is at least one of provided with and able to predict the ephemeris data for the at least one other network node 16 within a predetermined period of time.
  • the method further includes predicting the ephemeris data based on at least one of statistical data and historical data associated with the at least one other network node 16.
  • the status of the ephemeris data is at least one of the network node 16 and the WD 22 is at least one of not provided with and not able to predict to the ephemeris data for the at least one other network node 16 within a predetermined period of time.
  • the measurement parameter is at least one configuration parameter associated with at least one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP).
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • the at least one configuration parameter associated with the SMTC includes at least one of a quantity of SMTCs, and SMTC duration, and an SMTC window duration.
  • the at least one configuration parameter associated with the MGP includes at least one of measurement gap length (MGL), measurement gap repetition period (MGRP), measurement gap time offset (MGTO) with respect to a reference time, measurement gap timing advance (MGTA).
  • the measurement process includes the WD 22 performing measurements on the signaling within a predetermined interval of time.
  • the method further includes performing the measurements on the signaling within the predetermine interval of time based on at least one of the performed adjustment and an adjustment indication received from the network node.
  • the method further includes transmitting a measurement indication indicating whether at least one of measurements have been performed on the signaling and corresponding measurement requirements have been met.
  • the measurement configuration is a set of measurement configurations
  • the measurement process is a set of measuring processes
  • performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement process of the set of measuring processes.
  • the adjustment is at least one of determined by the WD 22, determined by the network node 16, triggered implicitly, and triggered explicitly.
  • the communication system is a Non-Terrestrial Network (NTN)
  • the network node 16 is an NTN node serving the WD
  • the at least one other network node 16 is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • the final SMTC/measurement gap configuration is generated and provided by the network node 16, e.g., based on the propagation delay difference between at least one target cell and the serving cell of a WD 22.
  • Network node 16 may derive the propagation delay difference between at least one target cell and the serving cell according to the ephemeris and/or WD 22 reported information such as propagation delay and/or WD location.
  • FIG. 12 shows an example multi-SMTC (i.e., 3 SMTCs #1, #2, #3), each with a propagation delay.
  • WD 22 is configured with multiple SMTC configurations (e.g., a total of three in this example) for performing measurements on network nodes 16a, 16b, 16c (i.e., satellites A, B and C, respectively).
  • Multiple SMTC configurations are enabled by introducing different new propagation time offsets.
  • One purpose may be to enable WD 22 to receive respective reference signals (e.g., SSBs) within the configured SMTCs.
  • SSBs reference signals
  • Measurements may be performed in measurement gaps, e.g., if the measurements are done on non-serving carrier and/or if the bandwidth of the reference signals (e.g., SSBs) to be measured is not within the active Bandwidth Part (BWP). Therefore, WD 22 may further be configured with one or more MGPs.
  • the reference signals e.g., SSBs
  • An adaptive WD measurement process is described, e.g., in order to save WD power (e.g., energy, battery life, etc.) and/or avoid/minimize signaling overhead and/or minimize interruption due to link changes, e.g., interruptions due to cell change (e.g., handover (HO)), beam management (e.g., beam changes, etc.).
  • WD power e.g., energy, battery life, etc.
  • HO handover
  • beam management e.g., beam changes, etc.
  • the WD measurement process includes, WD 22 configuring, i.e., adapting, an operation of one or more signals with respect to the availability of ephemeris of neighbor satellite on serving satellite.
  • operation of a signal may comprise transmission of the signal by WD 22 and/or reception of the signal at WD 22.
  • the term operating a signal may comprise WD 22 transmitting the signal and/or receiving the signal.
  • the reception of a signal may also be called as monitoring a signal, measuring a signal, etc.
  • the measurement adaptation or adaptive measurement or adaptive measurement process enables WD 22, e.g., while maintaining the connection with satellite, to measure on signals with different rate and/or periodicity and/or over different time period in certain RRC state, e.g., in RRC IDLE and RRC INACTIVE procedures.
  • the monitoring adaptation or adaptive monitoring or adaptive monitoring procedure enables WD 22 to monitor a downlink control channel, (e.g., for paging, acquiring system information, etc.), while maintaining the connection with satellite, less frequently.
  • the measurement adaptation may be applied by WD 22 by means of utilizing the ephemeris knowledge of neighbor satellites.
  • the measurement adaptation is further elaborated below, based on condition of two sets of cases:
  • Case 1 When a network node 16, e.g., serving satellite, and/or WD 22 is provided with ephemeris data for one or more network nodes 16, e.g., neighbor satellites, to be measured and/or expected to be measured within a predetermined period of time, e.g., a necessary time period; or, when network node 16, e.g., serving satellite, and/or WD 22 can predict ephemeris data for one or more network nodes 16, e.g., neighbor satellites, based on any prior information (e.g., statistics/history such as measurements at the same location in the past) within the predetermined period of time.
  • WD 22 may perform (e.g., is expected to perform) the measurements within predetermined period of time in which measurement may be signaling (e.g., transmitted) by network node 16 and/or determined/decided by WD 22, acknowledged and synchronized with the network (e.g., network node 16); o
  • the ephemeris data for the other network nodes, e.g., neighbor satellites, to be measured and/or expected to be measured also includes all relevant information usable/required by WD 22 for performing the measurements on the other network nodes, e.g., neighbor satellites. This may also be called as valid ephemeris data for neighbor satellites to be measured or expected to be measured by WD 22.
  • network node 16 may also indirectly/implicitly assist (i.e., communicate with, relay any data/information to, etc.) WD 22 in measuring over shorter time (e.g., choose fewer SMTC number for fewer and/or closer neighbor satellites to be measured).
  • WD 22 acquires ephemeris data of other network nodes 16, e.g., neighbor satellites, then WD 22 may operate signals over shorter time.
  • Case 2 When a network node 16, e.g., serving satellite, and/or WD 22 is not provided with ephemeris data for one or more network nodes 16, e.g., neighbor satellites, to be measured or expected to be measured within a predetermined period of time, e.g., a necessary time period, and/or the ephemeris data for one or more network nodes 16, e.g., neighbor satellites, does not contain all relevant information, e.g., required by WD 22, for performing the measurement; or, when serving satellite and/or WD 22 cannot predict ephemeris data for neighbor satellites based on any prior information (statistics/history e.g.
  • the measurement may be signaling by network (i.e., network node 16) and/or determined/decided by WD 22, acknowledged and synchronized with the network (e.g., network node 16).
  • Nonlimiting examples of measurement configurations which can be adapted by the network (e.g., network node 16) based on ephemeris data availability are:
  • Parameters related to SMTC configurations e.g., number of SMTC, SMTC window duration, etc.
  • MGP measurement gap pattern
  • one or more SMTC related parameters configured by the network node 16 are adapted based on whether network node 16 (e.g., serving satellite) and/or WD 22 is provided with valid ephemeris data for other network nodes 16 (e.g., neighbor satellites) to be measured and/or expected to be measured by the WD 22.
  • Examples of SMTC related parameters may comprise multiple SMTC configurations (and/or multiple SMTCs), SMTC window duration (e.g., 1, 2, 3, 4 or 5 ms), etc. Different SMTC configurations may be realized by different sets of SMTC periodicities and/or time offsets.
  • WD 22 may be configured with at least certain number of SMTC configurations, e.g., N2 number of SMTCs or larger.
  • N2 number of SMTCs there may be no restriction on number of SMTCs to be configured in Case 1, i.e., any number of SMTCs can be configured when valid ephemeris data is provided to WD 22.
  • WD 22 may be configured with at least certain number of SMTC configurations, e.g., N2 number of SMTCs or larger by serving satellite.
  • N2 number of SMTCs or larger by serving satellite.
  • WD 22 may be configured with fewer number of SMTCs compared to the case when WD 22 is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured or expected to be measured by WD 22).
  • WD 22 may be configured with fewer number of SMTCs by network node 16, e.g., serving satellite, compared to the case when network node 16, e.g., serving satellite, is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured or expected to be measured by WD 22).
  • At least N1 number of SMTCs is configured in Case 1 and at least N2 number of SMTCs is configured in Case 2.
  • the value of N1 and N2 may further depend on the number of satellites on which WD 22 is required or is expected to perform the measurements, where N1 and N2 are different.
  • the SMTC duration for each configured SMTC comprises at least L2 time resources, e.g., L2 or larger.
  • L2 there may be no restriction on SMTC duration for any configured SMTC in Case 1, i.e., any SMTC duration can be configured when valid ephemeris data is provided to WD 22.
  • L2 are 4 ms, 5 ms, etc.
  • the SMTC duration for each configured SMTC comprises at least L2 time resources, e.g., L2 or larger.
  • L2 there may be no restriction on SMTC duration for any configured SMTC in Case 1, i.e., any SMTC duration can be configured when valid ephemeris data is provided to serving satellite. Examples of L2 are 4 ms, 5 ms, etc.
  • WD 22 may be configured with smaller duration of SMTC window compared to the case when WD 22 is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured and/or expected to be measured by WD 22).
  • WD22 may be configured with smaller duration of SMTC window by serving satellite compared to the case when the serving satellite is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured or expected to be measured by WD 22).
  • the SMTC duration for each configured SMTC comprises at least LI time resources in Case 1 and SMTC duration for each configured SMTC comprises at least L2 time resources in Case 2.
  • the SMTC duration for each configured SMTC comprises at least LI time resources in Case 1 and SMTC duration for each configured SMTC comprises at least L2 time resources in Case 2., where LI and L2 are different.
  • LI ⁇ L2.
  • WD 22 is provided with valid ephemeris data for certain number (KI) of other network nodes 16, e.g., neighbor satellites, but is not provided with ephemeris data and/or is provided with invalid ephemeris data for certain number (K2) of neighbor satellites.
  • the SMTC can be configured based one or more rules.
  • WD 22 is configured with larger number of SMTCs compared to the case when valid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with smaller number of SMTCs compared to the case when no ephemeris data or invalid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with same number of SMTCs compared to the case when no ephemeris data or invalid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with number of SMTCs above certain threshold (Hl) when no ephemeris data or invalid ephemeris data is provided for at least one configured neighbor satellites for performing the measurement;
  • Hl certain threshold
  • WD 22 is configured with SMTC duration of at least L3 time resources (e.g., 4 ms) for at least N3 number of configured SMTCs when no ephemeris data and/or invalid ephemeris data is provided for at least one configured neighbor satellite for performing the measurement; and o
  • N3 1.
  • L3 is the number of neighbor satellites without ephemeris data and/or with invalid ephemeris data.
  • Another example comprises another hybrid scenario.
  • Network node 16 e.g., serving satellite, is provided with valid ephemeris data for certain number (KI) of other network nodes, e.g., neighbor satellites, but is not provided with ephemeris data and/or is provided with invalid ephemeris data for certain number (K2) of neighbor satellites.
  • SMTC can be configured based one or more rules.
  • WD 22 is configured with larger number of SMTCs compared to the case when valid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with smaller number of SMTCs compared to the case when no ephemeris data and/or invalid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with same number of SMTCs compared to the case when no ephemeris data and/or invalid ephemeris data is provided for the configured neighbor satellites (K1+K2);
  • WD 22 is configured with number of SMTCs above certain threshold (Hl) when no ephemeris data and/or invalid ephemeris data is provided for at least one configured neighbor satellites for performing the measurement;
  • Hl certain threshold
  • WD 22 is configured with SMTC duration of at least L3 time resources (e.g., 4 ms) for at least N3 number of configured SMTCs when no ephemeris data and/or invalid ephemeris data is provided for at least one configured network node 16, e.g., neighbor satellite, for performing the measurement; and o
  • N3 1.
  • L3 is the number of other network nodes 16, e.g., neighbor satellites, without ephemeris data or with invalid ephemeris data.
  • one or more measurement gap pattern (MGP) related parameters configured by the network node 16 is/are adapted based on whether the network node 16, e.g., serving satellite, and/or WD 22 is provided with valid ephemeris data for other network nodes 16, e.g., neighbor satellites, to be measured or expected to be measured by WD 22.
  • MGP related parameters may comprise MGL, MGRP, Measurement Gap Offset (MGO), MGTA, etc. This is further described below.
  • WD 22 may be configured with MGP larger than certain threshold, e.g., D2 ms or larger.
  • WD 22 may be configured with MGP larger than certain threshold, e.g., D2 ms or larger.
  • MGL in Case 1 there may be no restriction on MGL in Case 1, i.e., any MGL can be configured when valid ephemeris data is provided to WD 22.
  • MGL in Case 2 is equal to or above certain threshold, e.g., D2 ms or larger. Examples of D2 are 6 ms, 10 ms etc.
  • WD 22 may be configured with MGP comprising smaller MGL compared to the case when WD 22 is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured and/or expected to be measured by WD 22).
  • WD 22 may be configured with MGP comprising smaller MGL compared to the case when the network node 16, e.g., serving satellite, is not provided with ephemeris data and/or not provided with valid ephemeris data (e.g., for neighbor satellites to be measured and/or expected to be measured by WD 22).
  • WD 22 may be configured with MGL of at least DI ms in Case 1 and MGL of at least D2 ms in Case 2; where D2 > DI.
  • Examples of DI and D2 are 3 ms and 6 ms, respectively.
  • Measurement procedures In one embodiment, WD 22 operates signals with measurement procedures according to measurement configurations.
  • the procedures may be referred to as:
  • WD 22 When WD 22 operates signals based on the first procedure, WD 22 may meet reference requirements.
  • the reference requirements may also be referred to as legacy requirements and/or requirements without relaxation, e.g., performing measurement s), acquiring SI, paging, etc., while meeting reference requirements.
  • Examples of requirements are measurement time, measurement accuracy, number of identified cells to measure per carrier, number of beams (e.g., SSBs) to measure, etc.
  • Examples of measurement time are cell detection time, measurement period of a measurement (e.g., SS-RSRP, SS- Reference Signal Received Quality (RSRQ), SS Signal-to-Noise and Interference Ratio (SINR), etc.), SSB index acquisition time, measurement reporting delay, radio link monitoring (RLM) evaluation period (e.g. out of sync evaluation period, in sync evaluation period, beam detection evaluation period, candidate beam detection evaluation period, measurement period of LI -measurement such as Layer 1 RSRP (Ll-RSRP), LI -SINR.
  • RLM radio link monitoring
  • measurements are performed, and the corresponding measurement requirements are met provided that WD 22 is configured with the SMTC configuration. Otherwise, WD 22 is not required and/or is not expected to perform the measurements and/or meet the corresponding measurement requirements.
  • This can be specified as one or more rules. Examples of rules are as follows.
  • WD 22 in Case 1 performs the measurements and meets the corresponding measurement requirements provided that the configured SMTCs meet the requirement and/or conditions (e.g., min no. of SMTCs, min SMTC duration) associated with Case 1.
  • the requirement and/or conditions e.g., min no. of SMTCs, min SMTC duration
  • WD 22, in Case 1 performs the measurements and meets the corresponding measurement requirements provided that the configured MGP meets the requirements and/or conditions (e.g., min MGL size) associated with Case 1.
  • the configured MGP meets the requirements and/or conditions (e.g., min MGL size) associated with Case 1.
  • WD 22, in Case 1 performs the measurements and meets the corresponding measurement requirements even if the configured SMTCs meet the requirement and/or conditions (e.g., min no. of SMTCs, min SMTC duration, etc.) associated with Case 2.
  • WD 22 in Case 1 performs the measurements and meets the corresponding measurement requirements even if the configured MGP meets the requirements and/or conditions (e.g., min no. of SMTCs, min SMTC duration, etc.) associated with Case 2.
  • the requirements and/or conditions e.g., min no. of SMTCs, min SMTC duration, etc.
  • WD 22 in Case 2, performs the measurements and meets the corresponding measurement requirements provided that the configured SMTCs meet the requirement and/or conditions (e.g., min no. of SMTCs, min SMTC duration, etc.) associated with Case 2. For example, if the number of configured number of SMTCs is below N2 and/or SMTC duration is below L2 time resources then WD 22 may not perform measurements and/or meet corresponding measurement requirements.
  • the requirement and/or conditions e.g., min no. of SMTCs, min SMTC duration, etc.
  • WD 22 in Case 2 performs the measurements and meets the corresponding measurement requirements provided that the configured MGP meets the requirements and/or conditions (e.g., min MGL size) associated with Case 2. For example, if the MGL of the configured MGP is below D2 ms then WD 22 may not perform measurements and/or meet corresponding measurement requirements.
  • the requirements and/or conditions e.g., min MGL size
  • WD 22 may perform measurements using the SMTC configuration (e.g., number of SMTCs, SMTC duration etc.), which is associated with Case 1, and provided by the network node 16.
  • SMTC configuration e.g., number of SMTCs, SMTC duration etc.
  • WD 22 may perform measurements using the SMTC configuration (e.g., number of SMTCs, SMTC duration etc.), which is associated with Case 2, and provided by the network node 16.
  • the SMTC configuration e.g., number of SMTCs, SMTC duration etc.
  • WD 22 may perform measurements using the MGP configuration (e.g., MGL), which is associated with Case 1, and provided by the network node 16.
  • MGP configuration e.g., MGL
  • WD 22 may perform measurements using the MGP configuration (e.g.,
  • WD 22 may measure every an Lth SMTC occasion where L ⁇ K. When WD 22 determines/knows it does not have to detect and measure N SSBs but only M, WD 22 may still obtain (e.g., get equally good) measurement results with less effort.
  • N>M M.
  • WD 22 may choose to measure on fewer number of beams (e.g., SSBs) compared to those in P2 state.
  • SSBs beams
  • WD 22 may be allowed to perform measurements according to one or more of the following mode of operations: o WD 22 performs measurements less frequently than in P2 state; o WD 22 performs measurements over a longer period of time than in P2 state; o WD 22 performs measurements with an accuracy worse than time than in P2 state; o WD 22 performs measurements on fewer cells than in P2 state; o WD 22 performs measurements on fewer reference signals than in P2 state; o WD 22 performs measurements while meeting a requirement which is less stringent than in P2 state; and/or o WD 22 transmits measurement reports to a network node 16 less frequently than in P2 state.
  • the measurement performed by WD22 when operating in Pl state may meet reference requirements (e.g., reference measurement time) which may be more relaxed than the requirements met by WD 22 for the measurement performed when operating in P2 state.
  • reference requirements e.g., reference measurement time
  • Signaling to switch measurement configuration and measurement procedure WD 22 may operate signals according to different measurement configurations and/or measurement procedures, as described in the present disclosure. Switching among different measurement configurations may be performed by network (e.g., network node 16) where implicit signaling may reuse existing protocol, e.g., WD requests/requires to be informed when to measure.
  • network e.g., network node 16
  • implicit signaling may reuse existing protocol, e.g., WD requests/requires to be informed when to measure.
  • different measurement procedures can be determined and/or changed by network (e.g., network node 16) with implicit signaling and/or explicit signaling.
  • network e.g., network node 16
  • implicit signaling is where WD 22 determines a relation between measurement configuration and measurement procedure and determines/decides which measurement procedure to follow/perform.
  • explicit signaling is where WD 22 can be informed by network (e.g., network node 16) of signaling on validity of ephemeris of other network nodes 16, e.g., neighbor satellites. The signaling may be updated periodically or aperiodically.
  • WD 22 may operates with different measurement procedures following the signaling and/or measurement configuration determined by the network (e.g., network node 16).
  • WD 22 may inform the network node 16 indicating that WD 22 does not perform measurements and/or meet corresponding measurement requirements in case WD 22 is configured with the SMTC configurations which are not associated with and/or valid for a scenario in which WD 22 is operating. For example, in Case 2, if the number of configured number of SMTCs is below N2 and/or SMTC duration is below L2 time resources, then the WD may inform the network (e.g., network node 16) that WD 22 is not performing and/or will not perform measurements and/or meet corresponding measurement requirements.
  • the network e.g., network node 16
  • WD 22 may inform the network (e.g., network node) the number of SMTCs based on known information (ephemeris data, positioning, timing, etc.) acquired by WD 22 for reference of (i.e., usable for) the network node 16 determinations/ deci sions .
  • known information e.g., ephemeris data, positioning, timing, etc.
  • WD 22 may inform the network node 16 indicating that WD 22 does not perform measurements and/or meet corresponding measurement requirements in case WD 22 is configured with the MGP configuration which is not associated with and/or valid for a scenario in which WD 22 is operating. For example, in Case 2, if the MGL of the configured MGP is below D2 ms, then WD 2 may inform the network (e.g., network node 16) that WD 22 is not performing and/or will not perform measurements and/or meet corresponding measurement requirements.
  • the network e.g., network node 16
  • WD 22 may inform the network (e.g., network node 16) the MGL of the configured MGP based on known information (ephemeris data, positioning, timing, etc.) acquired by WD 22 for reference of (i.e., usable for) the network node 16 determinations/decisions.
  • known information e.g., ephemeris data, positioning, timing, etc.
  • a network node configured to communicate with a wireless device (WD) in a communication system, the network node configured to, and/or comprising a radio interface and/or comprising processing circuitry configured to: cause the WD to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • WD wireless device
  • Embodiment A2 The network node of Embodiment Al, wherein the status of ephemeris data is any one of the network node and the WD is one of: provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment A3 The network node of any one of Embodiments Al and A2, wherein the status of ephemeris data is any one of the network node and the WD is one of: not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment A4 The network node of any one of Embodiments A1-A3, wherein the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP, performing the adjustment being caused at least in part by transmitting the measurement configuration to the WD from the network node.
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • Embodiment A5 The network node of any one of Embodiments A1-A4, wherein the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD, the network node, and the at least one other network node, operating at least the signal including any one of transmitting and receiving the signal.
  • Embodiment A6 The network node of any one of Embodiments A1-A5, wherein the measurement configuration is a set of measurement configurations, the measurement procedure is a set of measuring procedures, performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures.
  • Embodiment A7 The network node of any one of Embodiments A1-A6, wherein the performed adjustment is any one of determined by the WD and the network node, triggered implicitly, and triggered explicitly.
  • Embodiment A8 The network node of any one of Embodiments A1-A7, wherein the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • Embodiment Bl A method implemented in a network node configured to communicate with a wireless device (WD) in a communication system, the method comprising: causing the WD to perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • WD wireless device
  • Embodiment B2 The method of Embodiment B 1 , wherein the status of ephemeris data is any one of the network node and the WD is one of: provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment B3 The method of any one of Embodiments Bl and B2, wherein the status of ephemeris data is any one of the network node and the WD is one of: not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment B4 The method of any one of Embodiments B1-B3, wherein the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP, performing the adjustment being caused at least in part by transmitting the measurement configuration to the WD from the network node.
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • Embodiment B5. The method of any one of Embodiments B1-B4, wherein the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD, the network node, and the at least one other network node, operating at least the signal including any one of transmitting and receiving the signal.
  • Embodiment B6 The method of any one of Embodiments B1-B5, wherein the measurement configuration is a set of measurement configurations, the measurement procedure is a set of measuring procedures, performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures.
  • Embodiment B7 The method of any one of Embodiments B1-B6, wherein the performed adjustment is any one of determined by the WD and the network node, triggered implicitly, and triggered explicitly.
  • Embodiment B8 The method of any one of Embodiments B1-B7, wherein the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • a wireless device configured to communicate with a network node in a communication system, the WD configured to, and/or comprising a radio interface and/or processing circuitry configured to: perform an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • Embodiment C2 The WD of Embodiment Cl, wherein the status of ephemeris data is any one of the network node and the WD is one of: provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment C3 The WD of any one of Embodiments Cl and C2, wherein the status of ephemeris data is any one of the network node and the WD is one of: not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment C4 The WD of any one of Embodiments C1-C3, wherein the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP.
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • Embodiment C5. The WD of any one of Embodiments C1-C4, wherein the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD, the network node, and the at least one other network node, operating at least the signal including any one of transmitting and receiving the signal.
  • Embodiment C6 The WD of any one of Embodiments C1-C5, wherein the measurement configuration is a set of measurement configurations, the measurement procedure is a set of measuring procedures, performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures.
  • Embodiment C7 The WD of any one of Embodiments C1-C6, wherein the performed adjustment is any one of determined by the WD and the network node, triggered implicitly, and triggered explicitly.
  • Embodiment C8 The WD of any one of Embodiments C1-C7, wherein the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • Embodiment DI A method implemented in a wireless device (WD) that is configured to communicate with a network node in a communication system, the method comprising: performing an adjustment of any one of a measurement parameter, a measurement configuration, and a measurement process based at least in part on a status of ephemeris data associated with at least one other network node.
  • Embodiment D2 The method of Embodiment DI, wherein the status of ephemeris data is any one of the network node and the WD is one of provided with and able to predict the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment D3 The method of any one of Embodiments DI and D2, wherein the status of ephemeris data is any one of the network node and the WD is one of not provided with and not able to predict to the ephemeris data for the at least one other network node within a predetermined period of time.
  • Embodiment D4 The method of any one of Embodiments D1-D3, wherein the measurement parameter is at least one configuration parameter associated with any one of a Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration (SMTC) and a Measurement Gap Pattern (MGP), and the measurement configuration is anyone of the SMTC and the MGP.
  • SMTC Synchronization Signal Physical Broadcast Channel block Measurement Timing Configuration
  • MGP Measurement Gap Pattern
  • Embodiment D5 The method of any one of Embodiments D1-D4, wherein the measurement process includes any one of performing measurements on and operating at least a signal associated with anyone of the WD, the network node, and the at least one other network node, operating at least the signal including any one of transmitting and receiving the signal.
  • Embodiment D6 The method of any one of Embodiments D1-D5, wherein the measurement configuration is a set of measurement configurations, the measurement procedure is a set of measuring procedures, performing the adjustment includes mapping at least one measurement configuration of the set of measurement configurations to at least one measurement procedure of the set of measuring procedures.
  • Embodiment D7 The method of any one of Embodiments D1-D6, wherein the performed adjustment is any one of determined by the WD and the network node, triggered implicitly, and triggered explicitly.
  • Embodiment D8 The method of any one of Embodiments D1-D7, wherein the communication system is a Non-Terrestrial Network (NTN), the network node is an NTN node serving the WD, and the at least one other network node is another NTN node that is a neighbor to the NTN node.
  • NTN Non-Terrestrial Network
  • the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. Accordingly, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects all generally referred to herein as a “circuit” or “module.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. Furthermore, the disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied in the medium that can be executed by a computer. Any suitable tangible computer readable medium may be utilized including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.
  • These computer program instructions may also be stored in a computer readable memory or storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • Computer program code for carrying out operations of the concepts described herein may be written in an object-oriented programming language such as Python, Java® or C++.
  • the computer program code for carrying out operations of the disclosure may also be written in conventional procedural programming languages, such as the "C" programming language.
  • the program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer.
  • the remote computer may be connected to the user's computer through a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider for example, AT&T, MCI, Sprint, EarthLink, MSN, GTE, etc.
  • GNSS Global Navigation Satellite System HO Handover

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des procédés, des systèmes et des appareils sont divulgués. Un nœud de réseau configuré pour communiquer avec un dispositif sans fil (WD) dans un système de communication est décrit. Le nœud de réseau comprend un circuit de traitement configuré pour pousser le WD à effectuer un réglage d'au moins un élément parmi un paramètre de mesure, une configuration de mesure et un processus de mesure sur la base, au moins en partie, d'un état de données d'éphémérides associées à au moins un autre nœud de réseau ; et provoquer au moins une émission et une réception de signalisation sur la base du réglage.
PCT/SE2022/050943 2021-10-19 2022-10-19 Mesures dans des réseaux non terrestres basées sur la validité de données d'éphémérides de satellites WO2023068990A1 (fr)

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Publication number Priority date Publication date Assignee Title
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