WO2022220220A1 - Équipement utilisateur, station de base, et procédé de commande de communication - Google Patents

Équipement utilisateur, station de base, et procédé de commande de communication Download PDF

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Publication number
WO2022220220A1
WO2022220220A1 PCT/JP2022/017499 JP2022017499W WO2022220220A1 WO 2022220220 A1 WO2022220220 A1 WO 2022220220A1 JP 2022017499 W JP2022017499 W JP 2022017499W WO 2022220220 A1 WO2022220220 A1 WO 2022220220A1
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Prior art keywords
measurement operation
base station
network
timing
control unit
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PCT/JP2022/017499
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English (en)
Japanese (ja)
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樹 長野
智之 山本
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株式会社デンソー
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/40—Security arrangements using identity modules
    • H04W12/45—Security arrangements using identity modules using multiple identity modules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to user equipment, base stations, and communication control methods used in mobile communication systems.
  • Non-Patent Documents 1 to 4 when a user device equipped with a plurality of subscriber identification modules has only one receiver (RX: Receiver), the user device maintains connection with the first network.
  • RX Receiver
  • a method is described in which the first network sets in the user equipment an interruption timing at which communication with the first network can be temporarily interrupted in order to enable measurement operation for receiving paging of the second network while the there is Such interruption timing is sometimes called a "gap".
  • a user device is a user device that communicates with a plurality of networks using a plurality of subscriber identification modules, and a communication unit that communicates with a base station of a first network included in the plurality of networks. and a control unit that, when an interruption timing for interrupting communication with the base station is set by the base station, performs a measurement operation at the interruption timing.
  • the communication unit transmits a sharing setting request requesting a setting for sharing the interruption timing in a time division manner between a first measurement operation for the first network and a second measurement operation for a second network included in the plurality of networks. Send to the base station.
  • a base station is a base station of a first network, and interrupts communication with the base station between a first measurement operation for the first network and a second measurement operation for the second network.
  • a communication unit that receives, from a user device, a sharing setting request requesting a setting for sharing timing in a time-sharing manner; and a control unit that acquires the sharing setting request.
  • a communication control method is a communication control method executed by a user device that communicates with a plurality of networks using a plurality of subscriber identification modules, wherein: a step of communicating with a base station; a step of performing a measurement operation at the suspension timing when a suspension timing for suspending communication with the base station is set by the base station; and a first measurement operation for the first network. and transmitting to the base station a sharing setting request requesting setting for sharing the interruption timing in a time division manner with a second measurement operation for a second network included in the plurality of networks.
  • FIG. 1 is a diagram showing a configuration example of a mobile communication system according to an embodiment
  • FIG. It is a figure which shows the structural example of the protocol stack of the mobile communication system which concerns on embodiment. It is a figure which shows the structural example of UE (user apparatus) which concerns on embodiment.
  • FIG. 3 is a diagram showing a configuration example of a base station of the first network according to the embodiment; It is a figure which shows the 1st operation example of embodiment. It is a figure which shows an example of the information contained in the message which concerns on embodiment. It is a figure which shows an example of the information contained in the message which concerns on embodiment.
  • FIG. 14 is a diagram showing operations when a UE transmits a sharing setting request to a base station according to a fourth operation example of the embodiment
  • FIG. 20 is a diagram showing operations when a UE transmits a sharing setting request to a base station according to the fifth operation example of the embodiment
  • the user equipment may need break timings for measurements in the first network (eg, intra-frequency measurements or inter-frequency measurements), ie break timings for the first network measurements.
  • the user equipment may need two types of suspension timing.
  • the current 3GPP standard does not consider the scenario of setting such two types of interruption timings in the user equipment, and there is concern that the user equipment cannot properly perform measurements on the first network and measurements on the second network.
  • one object of the present disclosure is to provide a user equipment, a base station, and a communication control method that enable appropriate measurement of the first network and the measurement of the second network using interruption timing. do.
  • Embodiments will be described with reference to FIGS. 1 to 12 .
  • System configuration A configuration of a mobile communication system 1 according to an embodiment will be described with reference to FIG.
  • 5G/NR 3GPP standard fifth generation system
  • 4G/LTE Long Term Evolution
  • the mobile communication system 1 has a user equipment (UE: User Equipment) 100, a first network 200A, and a second network 200B.
  • UE User Equipment
  • the UE 100 may be a mobile wireless communication device.
  • UE 100 may be a device used by a user.
  • the UE 100 is a mobile phone terminal (including a smartphone), a tablet terminal, a notebook PC, a communication module (including a communication card or chipset), a sensor or a device provided in a sensor, a vehicle or a device provided in a vehicle (for example, Vehicle UE), an aircraft or a device installed on the aircraft (for example, Aerial UE).
  • the UE 100 is a multi-SIM device that supports multiple subscriber identity modules (SIM).
  • SIM subscriber identity modules
  • the UE 100 communicates with multiple networks using multiple SIMs.
  • An example in which the UE 100 supports two SIMs will be mainly described below, but the UE 100 may support three or more SIMs.
  • “Supporting multiple SIMs” means that the UE 100 has the ability to handle multiple SIMs, and the UE 100 does not necessarily have to be equipped with multiple SIMs.
  • Such a UE 100 is sometimes called a "UE that supports multiple SIMs”.
  • the SIM is not limited to a card-type SIM (so-called SIM card), and may be an embedded SIM (so-called eSIM) pre-installed in the UE 100 .
  • the SIM is sometimes called a USIM (Universal Subscriber Identity Module).
  • the first network 200A is a network associated with one SIM of the UE 100.
  • a second network 200B is a network associated with the other SIM of the UE 100 . It is assumed that UE 100 performs location registration with first network 200A using one SIM, and performs location registration with second network 200B using the other SIM. That is, UE 100 is located in each of first network 200A and second network 200B.
  • the first network 200A and the second network 200B may be networks of different carriers. However, the first network 200A and the second network 200B may be networks of the same carrier. Different PLMN (Public Land Mobile Network) IDs may be assigned to the first network 200A and the second network 200B.
  • PLMN Public Land Mobile Network
  • the first network 200A has a base station 210A and a core network 220A that constitute a radio access network.
  • the core network 220A has a mobility management device 221A and a gateway device 222A.
  • the second network 200B has a base station 210B and a core network 220B forming a radio access network.
  • the core network 220B has a mobility management device 221B and a gateway device 222B.
  • the base stations 210A and 200B are not distinguished, they are simply referred to as the base station 210; when the mobility management devices 221A and 221B are not distinguished, they are simply referred to as the mobility management device 221; It is called gateway device 222 .
  • the base station 210 is a wireless communication device that performs wireless communication with the UE 100.
  • a base station 210 manages one or more cells.
  • the base station 210 performs radio communication with the UE 100 that has established a connection in the radio resource control (RRC) layer with its own cell.
  • the base station 210 has a radio resource management (RRM) function, a user data (hereinafter simply referred to as “data”) routing function, a measurement control function for mobility control/scheduling, and the like.
  • RRM radio resource management
  • a "cell” is used as a term indicating the minimum unit of a wireless communication area.
  • a “cell” is also used as a term indicating a function or resource for radio communication with the UE 100 .
  • One cell belongs to one carrier frequency.
  • FIG. 1 shows an example in which the base station 210A manages the cell C1 and the base station 210B manages the cell C2.
  • the UE 100 is located in the overlapping area of cell C1 and cell
  • the base station 210 may be a gNB, which is a 5G/NR base station, or an eNB, which is a 4G/LTE base station. In the following, an example in which the base station 210 is a gNB will be mainly described.
  • the base station 210 may be functionally divided into a CU (Central Unit) and a DU (Distributed Unit).
  • the base station 210 may be a relay node such as an IAB (Integrated Access and Backhaul) node.
  • the mobility management device 221 is a device that supports the control plane and performs various types of mobility management for the UE 100 .
  • the mobility management device 221 communicates with the UE 100 using NAS (Non-Access Stratum) signaling and manages information on the tracking area in which the UE 100 is located.
  • the mobility management device 221 performs paging through the base station 210 to notify the UE 100 of the incoming call.
  • the mobility management device 221 may be a 5G/NR AMF (Access and Mobility Management Function) or a 4G/LTE MME (Mobility Management Entity).
  • the gateway device 222 is a device compatible with the user plane, and is a device that performs data transfer control for the UE 100 .
  • the gateway device 222 may be a 5G/NR UPF (User Plane Function) or a 4G/LTE S-GW (Serving Gateway).
  • the protocol of the radio section between the UE 100 and the base station 210 includes a physical (PHY) layer, a MAC (Medium Access Control) layer, an RLC (Radio Link Control) layer, and a PDCP (Packet Data Convergence Protocol) layer and RRC (Radio Resource Control) layer.
  • PHY physical
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • the PHY layer performs encoding/decoding, modulation/demodulation, antenna mapping/demapping, and resource mapping/demapping. Data and control information are transmitted between the PHY layer of the UE 100 and the PHY layer of the base station 210 via physical channels.
  • the MAC layer performs data priority control, hybrid ARQ (HARQ) retransmission processing, random access procedures, and so on. Data and control information are transmitted between the MAC layer of the UE 100 and the MAC layer of the base station 210 via transport channels.
  • the MAC layer of base station 210 includes a scheduler. The scheduler determines uplink and downlink transport formats (transport block size, modulation and coding scheme (MCS)) and allocation resources to the UE 100 .
  • MCS modulation and coding scheme
  • the RLC layer uses the functions of the MAC layer and PHY layer to transmit data to the RLC layer on the receiving side. Data and control information are transmitted between the RLC layer of the UE 100 and the RLC layer of the base station 210 via logical channels.
  • the PDCP layer performs header compression/decompression and encryption/decryption.
  • An SDAP (Service Data Adaptation Protocol) layer may be provided as an upper layer of the PDCP layer.
  • the SDAP (Service Data Adaptation Protocol) layer performs mapping between an IP flow, which is the unit of QoS (Quality of Service) control performed by the core network, and a radio bearer, which is the unit of AS (Access Stratum) QoS control.
  • the RRC layer controls logical channels, transport channels and physical channels according to radio bearer establishment, re-establishment and release.
  • RRC signaling for various settings is transmitted between the RRC layer of the UE 100 and the RRC layer of the base station 210 . If there is an RRC connection between the RRC of UE 100 and the RRC of base station 210, UE 100 is in the RRC connected state. If there is no RRC connection between the RRC of the UE 100 and the RRC of the base station 210, the UE 100 is in RRC idle state. When the RRC connection between the RRC of UE 100 and the RRC of base station 210 is suspended, UE 100 is in RRC inactive state.
  • the NAS layer located above the RRC layer performs session management and mobility management for UE100.
  • NAS signaling is transmitted between the NAS layer of UE 100 and the NAS layer of mobility management device 221 .
  • the UE 100 has an application layer and the like in addition to the radio interface protocol.
  • UE 100 has antenna 101, SIM 111, SIM 112, communication section 120, and control section .
  • the antenna 101 may be provided outside the UE 100 .
  • SIM 111 and SIM 112 are SIM cards or eSIMs.
  • the SIM 111 stores subscriber information and setting information necessary for the UE 100 to communicate with the first network 200A.
  • the SIM 111 stores identification information of the UE 100 in the first network 200A, such as a telephone number and IMSI (International Mobile Subscriber Identity).
  • IMSI International Mobile Subscriber Identity
  • the SIM 112 stores subscriber information and setting information necessary for the UE 100 to communicate with the second network 200B.
  • the SIM 112 stores identification information of the UE 100 in the second network 200B, such as telephone number and IMSI.
  • the communication unit 120 performs wireless communication with the first network 200A and wireless communication with the second network 200B via the antenna 101.
  • the communication unit 120 may have only one receiver (RX: Receiver) 121 . In this case, the communication unit 120 cannot receive from the first network 200A and receive from the second network 200B at the same time.
  • the communication unit 120 may have only one transmission unit (TX: Transmitter) 122 .
  • the communication section 120 may have a plurality of transmission sections 122 .
  • Receiving section 121 converts a radio signal received by antenna 101 into a received signal that is a baseband signal, performs signal processing on the received signal, and outputs the received signal to control section 130 .
  • Transmitter 122 performs signal processing on a transmission signal, which is a baseband signal output from controller 130 , converts the signal into a radio signal, and transmits the radio signal from antenna 101 .
  • the control unit 130 controls the communication unit 120 and performs various controls in the UE 100.
  • Control unit 130 uses SIM 111 to control communication with first network 200A and uses SIM 112 to control communication with second network 200B.
  • Control unit 130 includes at least one processor and at least one memory.
  • the memory stores programs executed by the processor and information used for processing by the processor.
  • the memory may include at least one of ROM (Read Only Memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), RAM (Random Access Memory) and flash memory.
  • the processor may include a digital signal processor (DSP), which performs digital processing of digital signals, and a central processing unit (CPU), which executes programs. Note that part of the memory may be provided in the communication unit 120 . Also, the DSP may be provided in the communication unit 120 .
  • the communication unit 120 communicates with the base station 210A of the first network 200A included in the multiple networks.
  • the control unit 130 performs the measurement operation at the interruption timing.
  • the communication unit 120 transmits a sharing setting request requesting a setting for sharing the interruption timing in a time division manner between the first measurement operation for the first network 200A and the second measurement operation for the second network 200B included in the plurality of networks. 210A.
  • the control unit 130 can notify the base station 210A that the first measurement operation and the second measurement operation are requested to share the interruption timing in a time division manner. Since the base station 210A belongs to the first network 200A, it may not be possible for the UE 100 to determine whether the second measurement operation should be performed for the second network 200B, which is different from the first network 200A. Since the base station 210A can set the suspension timing to the UE 100 in consideration of the fact that the UE 100 desires to share the suspension timing in the first measurement operation and the second measurement operation in a time division manner, Appropriate interruption timing can be set in the UE 100. As a result, the UE 100 (control unit 130) can appropriately perform the first measurement operation and the second measurement operation using the interruption timing set in the base station 210A.
  • control unit 130 may include priority information indicating the priority of at least one of the first measurement operation and the second measurement operation in the sharing setting request. Thereby, the control unit 130 can inform the base station 210A of the priority of at least one of the first measurement operation and the second measurement operation. Since the base station 210A can set the suspension timing for the UE 100 in consideration of the priority, it is possible to set the appropriate suspension timing for the UE 100.
  • priority information indicating the priority of at least one of the first measurement operation and the second measurement operation in the sharing setting request.
  • the priority information may indicate the time ratio of the first measurement operation and the second measurement operation at the interruption timing. Accordingly, the controller 130 can inform the base station 210A of the time ratios of the first measurement operation and the second measurement operation. Since the base station 210A can set the suspension timing to the UE 100 in consideration of the time ratio, it is possible to set the appropriate suspension timing to the UE 100.
  • the second measurement operation may include measuring radio conditions in the second network 200B and monitoring paging of the second network 200B.
  • the control unit 130 can measure both the wireless state in the second network 200B and monitor the paging of the second network 200B at the interruption timing.
  • UE 100 (control unit 130) can appropriately perform the second measurement operation using the interruption timing.
  • the second measurement operation may consist of measuring radio conditions in the second network 200B. If the base station 210A sets the interruption timing for monitoring the paging of the second network 200B separately from the interruption timing, the control unit 130 performs the first measurement operation and the second measurement operation at the interruption timing shared by time division. may be performed, and monitoring may be performed at the interruption timing for monitoring. As a result, the control unit 130 does not need to perform the first measurement operation at one interruption timing (that is, interruption timing for monitoring), so it is possible to reliably monitor the paging of the second network 200B.
  • the communication unit 120 may receive the setting of the interruption timing from the base station 210A.
  • the control unit 130 may determine whether or not to transmit the sharing setting request to the base station 210A based on the setting of the interruption timing. Thereby, the control unit 130 can transmit a sharing setting request to the base station 210A when the sharing setting request is necessary after considering the interruption timing set in the UE 100 .
  • the control section 130 determines whether or not to perform the second measurement operation at the first interruption timing. good.
  • the communication unit 120 may transmit a sharing setting request to the base station 210A when it is determined to perform the second measurement operation at the first interruption timing. Accordingly, the control unit 130 can reduce the number of times communication with the base station 210 is interrupted due to a plurality of interruption timings by performing the first measurement operation and the second measurement operation at one interruption timing. As a result, it is possible to suppress a decrease in the data rate in the first network 200A while performing the first measurement operation and the second measurement operation.
  • control unit 130 may acquire a paging parameter set for specifying the timing at which the UE 100 monitors paging in the second network 200B.
  • the control unit 130 may include information derived based on the paging parameter set in the sharing setting request. This enables the base station 210A to grasp the timing at which the UE 100 should perform paging monitoring of the second network 200B. As a result, the base station 210A can determine an appropriate suspension timing considering the paging monitoring timing of the second network 200B by the UE 100.
  • the communication unit 120 may receive setting information for sharing the interruption timing between the first measurement operation and the second measurement operation in a time division manner.
  • the control unit 130 performs the first measurement operation and the second measurement operation at the interruption timing set by the setting information. Accordingly, since the interruption timing is set in consideration of the sharing setting request, the control section 130 can appropriately perform the first measurement operation and the second measurement operation at the interruption timing.
  • the interruption timing for measurement of the radio state a method of setting only one pattern of interruption timing for measurement for each user equipment (so-called per-UE measurement) and a measurement setting for each frequency (so-called , per-FR measurement), and a method of setting only two patterns of interrupt timing. Therefore, the number of interrupt timings that can be set in the user device is limited. Therefore, even if the interruption timing cannot be additionally set in the UE 100, by sharing the interruption timing between the first measurement operation and the second measurement operation in a time division manner, the control unit 130 can perform the second measurement operation. can be done.
  • the operation of the functional unit (specifically, at least one of the antenna 101, SIM 111, SIM 112, communication unit 120, and control unit 130) included in the UE 100 may be described as the operation of the UE 100. .
  • Base station configuration example A configuration example of the base station 210A of the first network 200A will be described with reference to FIG. Note that the base station 210B of the second network 200B has the same configuration as the base station 210A, so description thereof will be omitted. As shown in FIG. 4 , base station 210A has antenna 211 , communication section 212 , network interface 213 and control section 214 .
  • the communication unit 212 communicates with the UE 100 via the antenna 211 under the control of the control unit 214.
  • the communication unit 212 has a receiving unit 212a and a transmitting unit 212b.
  • the receiving unit 212 a converts a radio signal received by the antenna 211 into a received signal that is a baseband signal, performs signal processing on the received signal, and outputs the received signal to the control unit 214 .
  • the transmission unit 212 b performs signal processing on a transmission signal, which is a baseband signal output from the control unit 214 , converts the signal into a radio signal, and transmits the radio signal from the antenna 211 .
  • the network interface 213 is connected with the core network 220A.
  • Network interface 213 performs network communication with mobility management device 221A and gateway device 222A under the control of control unit 214 .
  • the control unit 214 controls the communication unit 212 and performs various controls in the base station 210A.
  • Control unit 214 includes at least one processor and at least one memory.
  • the memory stores programs executed by the processor and information used for processing by the processor.
  • the memory may include at least one of ROM, EPROM, EEPROM, RAM and flash memory.
  • the processor may include a digital signal processor (DSP), which performs digital processing of digital signals, and a central processing unit (CPU), which executes programs. Note that part of the memory may be provided in the communication unit 212 . Also, the DSP may be provided in the communication unit 212 .
  • DSP digital signal processor
  • the communication unit 212 interrupts communication with the base station 210A between the first measurement operation for the first network 200A and the second measurement operation for the second network 200B.
  • a sharing setting request is received from the UE 100 requesting a setting for sharing the interruption timing to be performed in a time division manner.
  • the control unit 214 acquires the sharing setting request. By this means, the control unit 214 can grasp that the UE 100 requests the setting of sharing the interruption timing between the first measurement operation and the second measurement operation in a time division manner.
  • the control unit 214 can determine an appropriate interruption timing considering that the UE 100 is requesting the setting.
  • the operation of the functional units (specifically, at least one of the antenna 211, the communication unit 212, the network interface 213, and the control unit 214) provided in the base station 210A will be described as the operation of the base station 210A. Sometimes.
  • FIG. 5 A first operation example of the mobile communication system 1 will be described with reference to FIGS. 5 to 8.
  • FIG. 5 the UE 100 is assumed to be in the RRC connected state with respect to the first network 200A and in the RRC idle state or RRC inactive state with respect to the second network 200B.
  • the UE 100 communicates with the base station 210A using the cell C1 managed by the base station 210A of the first network 200A as a serving cell.
  • UE 100 is located in cell C2 managed by base station 210B of second network 200B.
  • the base station 210A of the first network 200A is the gNB and the base station 210B of the second network 200B is the gNB.
  • Step S101 The base station 210B (communication unit 212) of the second network 200B transmits a message containing the paging parameter set in the second network 200B.
  • the message containing the paging parameter set in the second network 200B is, for example, a system information block (SIB) broadcast from the base station 210B.
  • SIB system information block
  • the UE 100 can receive SIBs (eg, SIB type 1) not only when it is in the RRC connected state with respect to the second network 200B, but also when it is in the RRC idle state or RRC inactive state with respect to the second network 200B.
  • the paging parameter set is for specifying the timing (that is, PF (paging frame)/PO (paging opportunity)) at which UE 100 monitors paging in second network 200B.
  • a paging parameter set may include configuration information for paging.
  • the configuration information may be PCCH-Config.
  • the paging parameter set may include the identity of the UE 100 in the second network 200B.
  • the ID is the 5G-S-TMSI (Temporary Mobile Subscriber Identity) of the UE 100 in the second network 200B, or the 5G-S-TMSI 10 least significant bits.
  • the base station 210B of the second network 200B is an eNB
  • the ID is the IMSI of the UE 100 in the second network 200B or the 10 least significant bits of the IMSI.
  • the base station 210B may transmit location information of radio signals used by the UE 100 to measure the radio state in the second network 200B.
  • the base station 210B may include the location information of the radio signal in the message.
  • the radio signal is, for example, SSB (SS (Synchronization Signal)/PBCH Block).
  • the SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a PBCH (Physical Broadcast Channel), and a demodulation reference signal (DMRS).
  • PSS primary synchronization signal
  • SSS secondary synchronization signal
  • PBCH Physical Broadcast Channel
  • DMRS demodulation reference signal
  • the SSB may consist of four consecutive OFDM (Orthogonal Frequency Division Multiplexing) symbols in the time domain.
  • the SSB may consist of 240 consecutive subcarriers (ie, 20 resource blocks) in the frequency domain.
  • PBCH is a physical channel that carries a Master Information Block (MIB).
  • the SSB location information may be each setting parameter for setting the SMTC (SSB measurement timing configuration) window.
  • the UE 100 detects and measures SSB within the SMTC window.
  • the SSB position information includes, for example, ssb-PositionsInBurst indicating the position of the SSB in the time domain. More specifically, ssb-PositionsInBurst indicates which of the maximum 64 SSBs are being transmitted from base station 210B.
  • the SSB location information may include ssb-PeriodicityServingCell indicating the SSB transmission period.
  • Step S102 UE 100 (control unit 130) acquires the paging parameter set included in the SIB. Also, the UE 100 (control unit 130) may acquire the location information of the SSB. The UE 100 (control unit 130) may acquire the paging parameter set and also acquire the location information of the SSB when the interruption timing (that is, gap) is required.
  • the UE 100 (control unit 130) derives the PF and PO based on the paging parameter set.
  • UE 100 (control unit 130) can derive the PF by the following formula in the case of 5G/NR:
  • SFN is the PF's system frame number (SFN).
  • PF_offset is the offset used to determine the PF.
  • T is the DRX (discontinuous reception) cycle of the UE 100 .
  • UE_ID is the 10 least significant bits of 5G-S-TMSI.
  • N is the total number of PFs in T. For example, T is indicated by the defaultPagingCycle included in PCCH-Config. For example, N and PF_offset are indicated by nAndPagingFrameOffset contained in PCCH-Config.
  • UE_ID is the 10 least significant bits of 5G-S-TMSI.
  • N is the total number of PFs in T. T is the DRX cycle of UE 100;
  • Ns is the number of POs to PF.
  • N is indicated by nAndPagingFrameOffset contained in PCCH-Config.
  • Ns is indicated by ns included in PCCH-Config.
  • a PO is associated with a PF. For example, a PO starts within or after a PF.
  • the UE 100 may determine the SSB reception timing for receiving the SSB transmitted from the base station 210B based on the SSB location information.
  • the SSB reception timing may be a period within the SMTC window.
  • Step S103 Base station 210A (communication unit 212) transmits to UE 100 an RRC reset message including the interruption timing setting.
  • UE 100 (communication unit 120) receives the RRC reconfiguration message.
  • the UE 100 (control unit 130) stores and applies the suspension timing setting included in the received RRC reconfiguration message.
  • the interruption timing settings may include a measurement gap parameter set for specifying measurement gaps.
  • the measurement gap parameter set may include gapOffset, mgl, mgrp and mgta.
  • mgl is the measurement gap length of the measurement gap.
  • mgrp is the measurement gap repetition period (MGRP) of the measurement gap.
  • mgta is the measurement gap timing advance.
  • gapOffset is the gap offset of the gap pattern with MGRP.
  • the interruption timing setting indicates the interruption timing (hereinafter referred to as the first interruption timing) for the measurement operation (hereinafter appropriately referred to as the first measurement operation) for the first network 200A. Details of the first measurement operation will be described in step S111.
  • Step S104 UE 100 (communication unit 120) transmits to base station 210A an RRC reset completion message indicating that the setting by the RRC reset message from base station 210A is completed.
  • the base station 210A (communication unit 212) receives the RRC reconfiguration complete message.
  • Step S105 UE 100 (control unit 130) determines whether or not a sharing setting request requesting a setting for sharing the interruption timing in time division between the first measurement operation for first network 200A and the second measurement operation for second network 200B is necessary. judge.
  • the UE 100 (control unit 130) may determine that a sharing setting request is required, for example, in any of the following cases.
  • the UE 100 performs the process of step S106.
  • One of the interruption timing set in the UE 100 and the timing for monitoring paging (for example, PF/PO) is included in the timing of the other.
  • the interruption timing set in the UE 100 and the timing for monitoring paging partially overlap.
  • One of the interruption timing and the SSB reception timing set in the UE 100 is included in the timing of the other.
  • the interruption timing set in the UE 100 and the SSB reception timing at least partially overlap.
  • the UE 100 may determine whether or not to perform the second measurement operation at the first interruption timing.
  • the UE 100 may perform the process of step S106 when determining to perform the second measurement operation. Details of the second measurement operation will be described in step S111.
  • the UE 100 may determine that a sharing setting request is necessary in any of the following cases, for example.
  • the interruption timing has already been set in the UE 100 to perform the second measurement operation. • No interrupt timing is required to perform the second measurement operation.
  • control unit 130 determines that the sharing setting request is not necessary, it may omit the processing of step S106 and perform the processing of step S111.
  • Step S106 UE 100 (control unit 130) generates an RRC message including a sharing setting request.
  • UE 100 (communication unit 120) then transmits an RRC message including a sharing setting request to base station 210A of first network 200A.
  • the base station 210A (communication unit 212) receives the RRC message.
  • the base station 210A (communication unit 212) receives the sharing setting request through the RRC message.
  • the base station 210A acquires the sharing setting request included in the RRC message.
  • the RRC message may be, for example, a new message for requesting setting of suspension timing (eg, measurement gap) for UE 100, as shown in FIG. This new message may be referred to as a Measurement Gap Request message.
  • the RRC message may also be a UE Auxiliary Information message for indicating UE auxiliary information to the network, eg, as shown in FIG.
  • the UE 100 may include priority information indicating the priority of at least one of the first measurement operation and the second measurement operation in the sharing setting request.
  • the priority information may indicate that the first measurement operation has priority over the second measurement operation, may indicate that the second measurement operation has priority over the first measurement operation, or may indicate that the first measurement operation has priority over the first measurement operation. It may indicate that the priority of the action and the priority of the second measurement action are equal.
  • the priority information may indicate the priority of each of the first measurement operation and the second measurement operation by a numerical value (for example, three levels).
  • the priority information may indicate that the first measurement operation should be performed before the second measurement operation, or may indicate that the second measurement operation should be performed before the first measurement operation.
  • the priority information may indicate, for example, the time ratio of the first measurement operation and the second measurement operation at the interruption timing. As shown in FIGS. 6 and 7, the priority information may indicate measGapSaringPreference. measGapSharingPreference may indicate the preference of UE 100 regarding the time ratio of the first measurement operation and the second measurement operation at the interruption timing.
  • the priority information may be indicated by a measurement gap sharing configuration (MeasGapSharingConfig) that specifies the measurement gap sharing scheme.
  • the measurement gap sharing setting may indicate, for example, any one of “scheme 00”, “scheme 01”, “scheme 10”, and “scheme 11”.
  • Scheme 00 indicates, for example, that the time ratio of the first measurement operation and the time ratio of the first measurement operation are the same, and the priority of the first measurement operation and the priority of the second measurement operation are the same. You can show that they are equal.
  • Scheme 01 indicates, for example, that the X value used to calculate the time ratio is 25%, and the priority of the first measurement operation (or the second measurement operation) is the second measurement operation (or the first measurement operation). action).
  • Scheme 10 may indicate, for example, that the X value used to calculate the time ratio is 50%, and that the priority of the first measurement operation and the priority of the second measurement operation are equal.
  • Scheme 11 indicates, for example, that the X value used for calculating the time ratio is 75%, and the priority of the first measurement operation (or the second measurement operation) is the second measurement operation (or the first measurement operation). action).
  • the UE 100 may determine priority according to each measurement operation, for example.
  • the UE 100 may set the priority of the second measurement operation higher than the priority of the first measurement operation.
  • the UE 100 (control unit 130) may determine the priority according to the services used in each network. UE 100 (control unit 130), for example, when using an important service (for example, call service) in the first network 200A, the priority of the first measurement operation, the priority of the second measurement operation higher than You can
  • the UE 100 may include information derived based on the paging parameter set acquired from the second network 200B in the sharing setting request (eg, MeasGapRequest).
  • the information is, for example, PF and PO information.
  • the PF and PO information is, for example, at least one of pagingCycle, firstPF, PagingOccasionIndex, and firstPDCCH-MonitoringOccasionOfPO.
  • pagingCycle indicates the cycle in which the UE 100 monitors paging.
  • firstPF indicates the smallest SFN among the SFNs that satisfy the formula for deriving PF (see, for example, formula (1) above).
  • PagingOccasionIndex indicates the PO for which the UE 100 monitors paging signals.
  • firstPDCCH-MonitoringOccasionOfPO indicates the location of the first PO within the PF.
  • Step S107 The base station 210A (control unit 214) determines the suspension timing to be set for the UE100 based on the sharing setting request received from the UE100.
  • the base station 210A (control unit 214) may determine the shared suspension timing shared by the first measurement operation and the second measurement operation in time division as the suspension timing to be set in the UE 100.
  • base station 210A sets sharing suspension as the suspension timing to be set for UE 100. You can decide the timing.
  • the base station 210A (control unit 214) may determine the shared suspension timing as the suspension timing to be set for the UE 100 when one of the suspension timing and the SSB reception timing set for the UE 100 is included in the timing of the other. .
  • the base station 210A determines the period and duration of the interruption timing.
  • the base station 210A (control unit 214) generates an RRC reconfiguration message including the suspension timing setting indicating the determined suspension timing.
  • the base station 210A (control unit 214) will be described as having generated an RRC reconfiguration message including a suspension timing setting indicating sharing suspension timing.
  • the base station 210A may generate an RRC reset message including the same setting as the suspension timing set in step S103, or execute the processing of step S108. It doesn't have to be.
  • Step S108 The base station 210A (communication unit 212) transmits to the UE 100 an RRC reconfiguration message including the suspension timing setting indicating the suspension timing determined in step S107.
  • UE 100 receives the RRC reconfiguration message.
  • the interruption timing setting may include setting information for sharing the interruption timing between the first measurement operation and the second measurement operation in a time division manner.
  • the configuration information may be, for example, a measurement gap sharing configuration (MeasGapSharingConfig).
  • Step S109 This is the same as step S104.
  • Step S110 The base station 210A (control unit 214) allocates radio resources to the UE 100 and communicates with the UE 100 at timings other than the suspension timing set for the UE 100.
  • FIG. The UE 100 (control unit 130) monitors the PDCCH of the base station 210A and communicates with the base station 210A at timings other than the interruption timing set by the base station 210A.
  • UE 100 communicates with base station 210 on the first frequency of cell C1, which is the serving cell of first network 200A.
  • Step S111 The base station 210A (control unit 214) suspends communication with the UE 100 without allocating radio resources to the UE 100 at the suspension timing set for the UE 100.
  • FIG. UE 100 (control unit 130) performs a measurement operation at the interruption timing set by base station 210A. Specifically, the UE 100 (control unit 130) suspends communication with the base station 210A at the suspension timing set by the setting information (that is, suspension timing setting) received from the base station 210A, and performs the measurement operation. conduct.
  • the measurement operation includes a first measurement operation and a second measurement operation.
  • the first measurement operation is an operation of measuring the radio state in the first network 200A.
  • the first measurement operation is, for example, intra-frequency measurement for measuring the radio state within the frequency of the serving cell in the first network 200A, inter-frequency measurement for measuring the radio state outside the frequency of the serving cell in the first network 200A, and the like. .
  • the second measurement operation may include a measurement operation for receiving paging of the second network 200B. Accordingly, a second measurement operation may include monitoring paging of the second network 200B. Also, the second measurement operation may include measurement of radio conditions in the second network 200B. In this operation example, since the base station 210B of the second network 200B is a gNB, the radio state measurement in the second network 200B is SSB measurement.
  • the description will proceed assuming that the suspension timing set in the UE 100 is the shared suspension timing shared by the first measurement operation and the second measurement operation in a time division manner.
  • the UE 100 (control unit 130) performs the first measurement operation and the second measurement operation at the sharing interruption timing according to the interruption timing setting.
  • the UE 100 (control unit 130) first performs SSB measurement and paging monitoring as the second measurement operation at the sharing interruption timing.
  • the UE 100 performs SSB measurement and paging monitoring on a second frequency different from the first frequency. Next, after performing the second measurement operation, the UE 100 performs inter-frequency measurement as the first measurement operation before the end of the sharing interruption timing. The UE 100 performs inter-frequency measurements at a third frequency different from the first frequency and the second frequency.
  • the UE 100 After the sharing suspension timing ends, the UE 100 starts monitoring the PDCCH of the base station 210A and communicates with the base station 210A.
  • the shared configuration request and the second measurement operation consist of measuring radio conditions in the second network 200B. Therefore, the UE 100 measures the radio state in the second network 200B at the sharing interruption timing without monitoring the paging of the second network 200B.
  • Steps S201 to S206 This is the same as steps S101 to S106 in Operation Example 1.
  • the UE 100 may request the base station 210 to interrupt timing for monitoring paging of the second network 200B, separately from the sharing setting request.
  • the UE 100 may include information requesting an interruption timing for monitoring paging in an RRC message together with the sharing setting request, or may include monitoring of paging in an RRC message separate from the RRC message including the sharing setting request. It may also include information requesting a break timing for UE 100 (control unit 130), for example, by means other than the RRC message, for example, MAC message, physical uplink control channel (PUCCH), etc., and notifies the base station 210 of the information requesting the interruption timing for monitoring paging. good too.
  • the UE 100 may include the information derived based on the paging parameter set in the information requesting the interruption timing for monitoring paging without including it in the sharing setting request.
  • Step S207 This is the same as step S107 in Operation Example 1.
  • the base station 210A may determine the suspension timing for paging monitoring in addition to the sharing suspension timing.
  • the base station 210A (the control unit 214) may generate an RRC reconfiguration message including a suspension timing setting indicating the sharing suspension timing and the suspension timing for paging monitoring.
  • the base station 210A (control unit 214) will proceed with the description assuming that it has generated the RRC reconfiguration message.
  • Steps S208 to S211 This is the same as steps S108 to S111 in Operation Example 1.
  • the UE 100 (control unit 130) measures the radio state in the second network 200B without monitoring the paging of the second network 200B at the sharing interruption timing.
  • Step S212 The UE 100 (control unit 130) monitors paging at the monitoring interruption timing set by the base station 210A.
  • Steps S301 to S303 This is the same as steps S101 to S103 in Operation Example 1.
  • step S303 the UE 100 (control unit 130) determines whether or not a sharing setting request is necessary before receiving the RRC reconfiguration message including the suspension timing setting from the base station 210A.
  • the UE 100 (control unit 130) may determine that a shared setting request is required, for example, when both the first measurement operation and the second measurement operation are required.
  • UE 100 (control unit 130) for example, before the base station 210 sets the interruption timing for the first measurement operation, if the second measurement operation is required, even if it determines that a sharing setting request is required good. This makes it possible to omit signaling between the UE 100 and the base station 210A, specifically, steps S103 and S104 of the first operation example.
  • Steps S304 and S305 This is the same as steps S106 and S107 in Operation Example 1.
  • step S305 if the base station 210A (control unit 214) does not need to set the interruption timing for the first measurement operation in the UE 100, the interruption timing to be set in the UE 100 is not the sharing interruption timing, but the Interrupt timings for two measurement operations may be determined.
  • Steps S306 to S309 This is the same as steps S108 to S111 in Operation Example 1.
  • step S309 when the interruption timing for the second measurement operation is set in the UE 100, the UE 100 (control unit 130) performs the first measurement operation at the interruption timing for the second measurement operation. A second measurement operation is performed without performing a measurement operation.
  • the UE 100 includes a sharing setting request in a message for requesting setting of the interruption timing for the UE 100 (hereinafter referred to as a measurement gap request message).
  • UE 100 (control unit 130), for example, when requesting an interruption timing (measurement gap) for monitoring the paging of the second network 200B, via SIB type 1 in the second network 200B , to obtain the configuration information for paging and the location information of the SSB.
  • UE 100 (control unit 130) derives PF and PO in second network 200B.
  • UE 100 (control unit 130) includes information derived from PF and PO in a shared setting request (eg, measGapRequired).
  • the UE 100 determines that it is necessary to share the interruption timing in a time division manner between the first measurement operation and the second measurement operation, priority is given to at least one of the first measurement operation and the second measurement operation. degree can be determined.
  • the UE 100 may include priority information indicating the determined priority (for example, measGapSaringPreference) in the sharing setting request.
  • UE 100 (control unit 130) generates a measurement gap request message including a sharing setting request.
  • UE 100 (control section 130) sends the generated measurement gap request message to a layer lower than the RRC layer for transmission, and controls communication section 120 to send the measurement gap request message to base station 210A.
  • the UE 100 includes a sharing setting request in the UE auxiliary information message.
  • UE 100 capable of providing a request for setting a measurement gap determines to monitor paging in second network 200B when UE 100 is set to provide the request, the following actions may be performed.
  • the UE 100 (control unit 130) is configured to provide a request for setting a measurement gap, and when the UE 100 is configured to provide the request, the interruption timing, for example, the paging of the second network 200B , the PF and PO may be derived and the priority may be determined in the same manner as in Operation Example 4.
  • the UE 100 (control unit 130) includes a sharing setting request (eg, measGapRequired) in the UE auxiliary information message, and sets a value indicating the information derived above in the sharing setting request.
  • the UE 100 (control unit 130) may include priority information in the UE auxiliary information message as necessary.
  • the UE 100 may transmit the sharing setting request to the base station 210A using an RRC message other than the RRC message described above.
  • the UE 100 (control unit 130) performs intra-frequency measurement and inter-frequency measurement as the first measurement operation, for example, at the sharing interruption timing, and performs paging of the second network 200B as the second measurement operation. Monitoring and radio condition measurements may be performed.
  • each operation flow described above is not limited to being implemented independently, but can be implemented by combining two or more operation flows. For example, some steps of one operation flow may be added to another operation flow, or some steps of one operation flow may be replaced with some steps of another operation flow.
  • a program that causes a computer to execute each process performed by the UE 100 or the base station 210 may be provided.
  • the program may be recorded on a computer readable medium.
  • a computer readable medium allows the installation of the program on the computer.
  • the computer-readable medium on which the program is recorded may be a non-transitory recording medium.
  • the non-transitory recording medium is not particularly limited, but may be, for example, a recording medium such as CD-ROM (Compact Disk Read Only Memory) or DVD-ROM (Digital Versatile Disc Read Only Memory). good.
  • circuits for executing each process performed by the UE 100 or the base station 210 may be integrated, and at least a part of the UE 100 or the base station 210 may be configured as a semiconductor integrated circuit (chipset, SoC (System On Chip)).
  • “transmit” may mean performing processing of at least one layer in the protocol stack used for transmission, or transmitting signals wirelessly or by wire. It may mean physically transmitting. Alternatively, “transmitting” may mean a combination of performing the at least one layer of processing and physically transmitting the signal wirelessly or by wire. Similarly, “receive” may mean performing processing of at least one layer in the protocol stack used for reception, or physically receiving a signal wirelessly or by wire. may mean that Alternatively, “receiving” may mean a combination of performing the at least one layer of processing and physically receiving the signal wirelessly or by wire.

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

Abstract

Le présent équipement utilisateur (100), qui communique avec une pluralité de réseaux (200A, 200B) au moyen d'une pluralité de modules d'identification d'abonné, comprend : une unité de communication (120) qui communique avec des stations de base (210, 210A) d'un premier réseau (200A) inclus dans la pluralité de réseaux ; et une unité de commande (130) qui, lorsqu'une synchronisation d'arrêt en vue d'arrêter la communication avec les stations de base est établie à partir de la station de base, effectue une opération de mesure à la synchronisation d'arrêt. L'unité de communication transmet, à la station de base, une demande de réglage de partage pour demander un réglage pour partager la synchronisation d'arrêt de manière répartie dans le temps dans une première opération de mesure pour le premier réseau et une seconde opération de mesure pour un second réseau (200B) inclus dans la pluralité de réseaux.
PCT/JP2022/017499 2021-04-16 2022-04-11 Équipement utilisateur, station de base, et procédé de commande de communication WO2022220220A1 (fr)

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Publication number Priority date Publication date Assignee Title
WO2021019680A1 (fr) * 2019-07-30 2021-02-04 ソフトバンク株式会社 Terminal, station de base, et procédé de communication sans fil

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Publication number Priority date Publication date Assignee Title
WO2021019680A1 (fr) * 2019-07-30 2021-02-04 ソフトバンク株式会社 Terminal, station de base, et procédé de communication sans fil

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DENSO CORPORATION: "Signalling design on short time switching procedure", 3GPP DRAFT; R2-2102940, vol. RAN WG2, 2 April 2021 (2021-04-02), pages 1 - 4, XP052174509 *
VIVO: "[post112-e][256][Multi-SIM] Network switching details (vivo)", 3GPP DRAFT; R2-2102262, vol. RAN WG2, 10 February 2021 (2021-02-10), pages 1 - 47, XP051977989 *

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