WO2022220218A1 - Équipement utilisateur et procédé de commande de communication - Google Patents

Équipement utilisateur et procédé de commande de communication Download PDF

Info

Publication number
WO2022220218A1
WO2022220218A1 PCT/JP2022/017491 JP2022017491W WO2022220218A1 WO 2022220218 A1 WO2022220218 A1 WO 2022220218A1 JP 2022017491 W JP2022017491 W JP 2022017491W WO 2022220218 A1 WO2022220218 A1 WO 2022220218A1
Authority
WO
WIPO (PCT)
Prior art keywords
priority
frequency band
frequency
cell
network
Prior art date
Application number
PCT/JP2022/017491
Other languages
English (en)
Japanese (ja)
Inventor
智之 山本
秀明 ▲高▼橋
Original Assignee
株式会社デンソー
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社デンソー filed Critical 株式会社デンソー
Publication of WO2022220218A1 publication Critical patent/WO2022220218A1/fr

Links

Images

Classifications

    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data

Definitions

  • the present disclosure relates to user equipment and communication control methods used in mobile communication systems.
  • the user device includes a plurality of receivers (RX: Receivers), one receiver is used for communication with one network (hereinafter referred to as “first network”), and the other receiver is used for communication with the other network. Paging can be monitored in the network (hereinafter "second network”).
  • RX Receivers
  • the user device when the user device has only one receiving unit, if there is an incoming call from the second network while one receiving unit is communicating with the first network, the user device may miss the incoming call. become. Therefore, in order for the user device to monitor the paging of the second network while maintaining the connection with the first network, the first network sets the user device to an interruption period during which communication with the first network can be temporarily interrupted. A method for doing so is being considered in the 3GPP standardization arena (see, for example, Non-Patent Document 1). Such interruption periods are sometimes referred to as "gap.”
  • a user device is a user device that communicates with a plurality of networks using a plurality of subscriber identification modules, and includes a first receiver that receives a radio signal in a first frequency band, a second frequency
  • the first receiving unit is used for communication between a second receiving unit that receives radio signals in a band and a first network included in the plurality of networks, in the second network included in the plurality of networks
  • a control unit that performs priority control to select a cell belonging to the second frequency band with priority over a cell belonging to the first frequency band in a selection operation for selecting a camp-on cell where the user equipment is located.
  • 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 first receiving unit of the user device: receiving radio signals in one frequency band; receiving radio signals in a second frequency band by a second receiving unit of the user equipment; When the first receiving unit is used, in the selection operation of selecting the camp-on cell where the user equipment is located in the second network included in the plurality of networks, the cell belonging to the first frequency band rather than the cell belonging to the first frequency band and performing priority control for preferentially selecting a cell belonging to the second frequency band.
  • FIG. 1 is a diagram showing the configuration 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 which concerns on embodiment. It is a figure explaining the receiving part of UE 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 operation example of the mobile communication system which concerns on embodiment.
  • FIG. 5 is a diagram illustrating an example of selection operation of the UE according to the embodiment;
  • the frequency ranges for receiving radio signals may differ among the plurality of receiving units provided in the user equipment. For example, assume a case where the user equipment includes a first receiver that receives radio signals in a first frequency band and a second receiver that receives radio signals in a second frequency band.
  • the camp-on cell in which the user device is located in the second network included in the plurality of networks In the selection operation, if a cell belonging to a frequency of the first frequency band that the second receiver cannot receive is selected, the first receiver must be used to monitor paging from the second network.
  • the user equipment is equipped with multiple receivers, it is necessary to set gaps in the user equipment since effectively only one receiver can be used. The user equipment has to interrupt communication with the first network during the period in which the gap is set, and there is a problem that the performance of communication with the first network is degraded.
  • one object of the present disclosure is to provide a user device and a communication control method that can monitor paging from the second network while maintaining communication with the first network.
  • a configuration of a mobile communication system 1 according to an embodiment will be described with reference to FIG.
  • An example in which the mobile communication system 1 is a 3GPP standard fifth generation system (5G/NR: New Radio) will be mainly described below.
  • the mobile communication system 1 may be at least partially applied to a 4th generation system (4G/LTE: Long Term Evolution) system and/or a 6th 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, for example, 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 the vehicle.
  • 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 the vehicle.
  • Vehicle UE Vehicle UE
  • aircraft or equipment 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
  • “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
  • a frame used in wireless communication between the UE 100 and the base station 210 is, for example, 10 ms, and each frame is assigned a system frame number (SFN: System Frame Number).
  • SFN System Frame Number
  • Each frame is divided into, for example, 1 ms subframes, and each subframe is composed of a plurality of OFDM (Orthogonal Frequency Division Multiplexing) symbols.
  • 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, a PDCP (Packet Data Convergence Protocol) layer and RRC layer.
  • PHY physical
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • 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 can perform a cell selection operation or a cell reselection operation as a selection operation to select a camp-on cell.
  • the UE 100 can perform the selection operation, for example, in any of the following cases.
  • (A) Cell selection operation In the cell selection operation, the UE 100 searches the frequency band and selects the strongest cell for each frequency (eg, CD-SSB (cell-defining SS (Synchronization Signal) / PBCH (Physical Broadcast CHannel) Block ) of the cell with the highest detection level, the cell with the highest CD-SSB received power (RSRP: Reference Signal Received Power), or the highest CD-SSB received quality (RSRQ: Reference Signal Received Quality) cell) Identify.
  • the UE 100 identifies a suitable cell among the strongest cells. If the UE 100 cannot identify a suitable cell (that is, no suitable cell is found), it identifies an acceptable cell.
  • UE 100 selects a suitable cell as a camp-on cell, if a suitable cell can be identified (that is, a suitable cell is found). UE 100 selects an allowable cell as a camp-on cell if only an allowable cell can be identified (that is, an allowable cell is found).
  • a suitable cell is a cell whose measured communication quality satisfies the cell selection criteria.
  • the PLMN of the appropriate cell is the selected PLMN, the registered PLMN or PLMNs equal to those PLMNs.
  • a suitable cell is not a prohibited cell or a reserved cell and is not part of a tracking area included in the "Forbidden Tracking Areas for Roaming" list.
  • An acceptable cell is a cell whose measured communication quality satisfies the cell selection criteria and is not a forbidden cell.
  • Cell selection criteria are, for example, Srxlev>0 and Squal>0.
  • Srxlev represents cell selection received power.
  • Q rxlevmeas is the measured cell received power (RSRP).
  • Q rxlevmin is the minimum required received power.
  • Q rxlevminoffset is a predetermined offset that is constantly applied.
  • P compensation is a parameter related to uplink capability.
  • Qoffset temp is the offset applied temporarily.
  • Squal represents the cell selection quality level.
  • Q qualmeas is the measured cell quality level (RSRQ).
  • Q qualmin is the minimum required quality level.
  • Q qualminoffset is a predetermined offset that is constantly applied.
  • Qoffset temp is the offset applied temporarily.
  • (B) Cell reselection operation In cell reselection operation, UE 100 measures the communication quality of the serving cell and neighboring cells. UE 100 selects a camp-on cell to be used as a serving cell, for example, based on the following criteria. UE 100 determines the priority of the cell to be selected based on the frequency priority. UE 100 may select a camp-on cell based on the following criteria when 1 second or more has elapsed since camping on the current serving cell.
  • Neighboring cell's frequency priority is higher than current serving cell's frequency priority: UE 100 selects a cell that satisfies the relationship of Squal>Thresh X, HighQ over a predetermined period (eg, Treselection RAT ) or a cell that satisfies the relationship of Srxlev>Thresh X, HighP over a predetermined period.
  • a predetermined period eg, Treselection RAT
  • Each of Thresh X, HighP and Thresh X, HighQ is a predetermined threshold.
  • the neighboring cell's frequency priority is the same as the current serving cell's frequency priority:
  • the UE 100 calculates the current serving cell ranking Rs and the neighboring cell ranking Rn.
  • the UE 100 selects a cell having a ranking Rn higher than Rs over a predetermined period as a camp-on cell.
  • Q meas,s is the current serving cell received power (RSRP).
  • Q meas,n is the neighbor cell received power (RSRP).
  • Q hyst is a hysteresis value for facilitating reselection of the current serving cell.
  • Qoffset temp is the offset applied temporarily.
  • the neighboring cell's frequency priority is lower than the current serving cell's frequency priority:
  • the serving cell satisfies the relationship Squal ⁇ Thresh Serving, LowQ or Srxlev ⁇ Thresh Serving, LowP over a predetermined period
  • the UE 100 satisfies the relationship Squal>Thresh X, LowQ over a predetermined period.
  • a cell that satisfies the relationship Srxlev>Thresh X, LowP over a predetermined period is selected.
  • Each of Thresh X, LowP and Thresh X, Low Q is a predetermined threshold.
  • Various parameters used in cell selection are included in information (SIB: System Information Block) broadcast from the base station 210 .
  • Various parameters include frequency priority (e.g., cellReselectionPriority, cellReselectionSubPriority), predetermined period (Treselection RAT ), various offsets (Q qualminoffset , Qrxlevminoffset, Q offsettemp , Q hyst , XQTh , Qth , various thresholds) ThreshX,HighP , ThreshServing,LowQ , ThreshServing,LowP, ThreshX ,LowP, ThreshX ,LowQ ).
  • cellReselectionPriority indicates priority of frequency in 8 levels.
  • cellReselectionSubPriority indicates the frequency sub-priority in four stages. As a result, up to 32 levels of priority can be set in the UE 100 for frequencies.
  • the frequency priority may be notified to the UE 100 in an RRC release message.
  • the frequency priority notified in the RRC release message can specify multiple frequency priorities in a list format. The priority of that frequency takes precedence over the priority of the broadcast frequency.
  • the UE 100 Based on the information received from the base station 210, the UE 100 performs a selection operation of selecting a camp-on cell.
  • the RRC release message may include carrier information specifying the frequency (so-called redirectedCarrierInfo).
  • Carrier information takes precedence over frequency priority.
  • UE 100 preferentially selects a cell belonging to the frequency specified by the carrier information, regardless of frequency priority.
  • FIG. 3 A configuration example of the UE 100 will be described with reference to FIGS. 3 and 4.
  • FIG. 3 UE 100 has antenna 101 , antenna 102 , SIM 111 , SIM 112 , communication section 120 and control section 130 .
  • Antenna 101 and antenna 102 may be provided outside the UE 100 .
  • Antenna 101 may be used for first communication section 120A, which will be described later, and antenna 102 may be used for second communication section 120B, which will be described later.
  • 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 Under the control of the control unit 130, 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 communicates with multiple networks using multiple SIMs.
  • the communication unit 120 has a first communication unit 120A and a second communication unit 120B.
  • the communication unit 120 has a plurality of receivers (RX: Receiver) 121 .
  • the first communication section 120A includes a first reception section 121A
  • the second communication section 120B includes a second reception section 121B.
  • the communication unit 120 has a plurality of transmission units (TX: Transmitter) 122 .
  • the communication section 120 may have only one transmission section 122 .
  • the first communication section 120A includes a first transmission section 122A
  • the second communication section 120B includes a second transmission section 122B.
  • 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 frequency range for receiving radio signals in the first receiving section 121A differs from the frequency range for receiving radio signals in the second receiving section 121B.
  • the first receiver 121A receives radio signals in the first frequency band.
  • the first receiver 121A supports reception of radio signals in the first frequency band, and does not support reception of radio signals in bands other than the first frequency band.
  • the second receiver 121B receives radio signals in the second frequency band.
  • the second receiver 121B supports reception of radio signals in the second frequency band, and does not support reception of radio signals in bands other than the second frequency band.
  • the first frequency band and the second frequency band partially overlap.
  • the frequency that can be received by the first receiving unit 121A (that is, the frequency that cannot be received by the second receiving unit 121B), the frequency that can be received by the first receiving unit 121A and the second receiving unit 121B, and the second receiving unit
  • the first frequency band includes frequency A and frequency B
  • the second frequency band includes frequency B and frequency C.
  • the first receiver 121A can receive radio signals on each of frequency A and frequency B, but cannot receive radio signals on frequency C.
  • the second receiver 121B can receive radio signals on each of frequency B and frequency C, but cannot receive radio signals on frequency A.
  • 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.
  • UE 100 is in the RRC connected state in cell C1 of base station 210A of first network 200A. It is also assumed that the UE 100 is in the RRC idle state or RRC inactive state in cell C2 of the base station 210B of the second network 200B.
  • Such a cell C2 may be called a camp-on cell for the UE 100.
  • UE 100 is located in a camp-on-cell.
  • control unit 130 selects a camp-on cell where UE 100 is located in second network 200B in the first frequency band. Priority control is performed to preferentially select a cell belonging to the second frequency band over the cell to which it belongs. Thereby, when the first receiving unit 121A is used for communication with the first network 200A, the UE 100 belongs to the second frequency band rather than the cell belonging to the first frequency band received by the first receiving unit 121A. It becomes easier to select a cell as a camp-on cell.
  • paging from the second network 200B in the second receiver 121B can be monitored.
  • “communication with the first network 200A” may be communication with the first network 200A in the RRC connected state, or communication with the first network 200A in the RRC idle state or RRC inactive state (for example, , monitoring of paging).
  • control unit 130 gives priority to the frequencies included in the first frequency band as lower priority than the priorities of the frequencies included in the second frequency band as the priority of the frequencies in the selection operation. You can control it. As a result, cells belonging to frequencies included in the first frequency band received by the first receiving unit 121A are less likely to be selected, and cells belonging to the second frequency band are more likely to be selected as camp-on cells.
  • the control unit 130 may perform priority control so that the priority of frequencies included in the first frequency band is regarded as the lowest priority as the priority of the frequencies in the selection operation. As a result, cells belonging to frequencies included in the first frequency band received by the first receiving unit 121A are less likely to be selected, and cells belonging to the second frequency band are more likely to be selected as camp-on cells. Therefore, if the UE 100 has multi-SIM capability to support multiple SIMs, has multiple receivers 121, and has already camped on the first network 200A with SIM 111, the UE 100 can use SIM 112 The frequency camped on may be considered the lowest priority.
  • the lowest priority may be, for example, the 32nd priority among the 32 levels of priority indicated by cellReselectionPriority and cellReselectionSubPriority.
  • the lowest priority may be a priority lower than the lowest priority set by the network.
  • the control unit 130 performs priority control so that the priority of the frequency used for communication with the first network 200A among the frequencies included in the first frequency band is regarded as the lowest priority as the frequency priority in the selection operation. may be performed. As a result, cells belonging to the frequency used for communication with the first network 200A are less likely to be selected, and cells belonging to the second frequency band are more likely to be selected as camp-on cells.
  • the control unit 130 performs priority control so that the priority of the frequency that does not overlap with the second frequency band among the frequencies included in the first frequency band is regarded as the lowest priority as the priority of the frequency in the selection operation. good. As a result, it becomes difficult for cells belonging to frequencies included in the first frequency band to be received by the first receiving unit 121A to be selected, while frequencies included in the first frequency band are received by the second receiving unit 121B. It is possible to prevent even cells belonging to frequencies included in the second frequency band from being difficult to be selected. This makes it easier to select a cell belonging to the second frequency band as a camp-on cell.
  • the control unit 130 performs priority control so that the priority of the frequency included in the second frequency band is regarded as higher than the priority of the frequency included in the first frequency band. you can go This makes it easier to select a cell belonging to the second frequency band as a camp-on cell.
  • the control unit 130 sets the priority of the frequencies included in the second frequency band higher than the frequencies included in the first frequency band that do not overlap with the second frequency band. Priority control may be performed so as to regard it as priority. As a result, it becomes easier to select the cell belonging to the second frequency band as the camp-on cell than the cell belonging to the frequency included in the first frequency band, while the second receiving unit 121B among the frequencies included in the first frequency band It is possible to avoid the difficulty of selecting even a cell belonging to a frequency included in the second frequency band received at .
  • the control unit 130 may perform priority control so that the priority of frequencies included in the second frequency band is regarded as the highest priority as the priority of frequencies in the selection operation. This makes it easier to select cells belonging to the second frequency band as camp-on cells than cells belonging to frequencies included in the first frequency band.
  • the control unit 130 may perform priority control so that cells belonging to the frequency used for communication with the first network 200A are regarded as prohibited cells that are prohibited from being selected as camp-on cells. As a result, cells belonging to the frequency used for communication with the first network 200A are not selected, making it easier to select cells belonging to the second frequency band as camp-on cells.
  • functional units provided 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. 5, the base station 210A has an antenna 211, a communication section 212, a network interface 213, and a 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 operation of the functional unit (specifically, at least one of the communication unit 212, the network interface 213, and the control unit 214) included in the base station 210 may be described as the operation of the base station 210. .
  • the UE 100 is in the RRC connected state in cell C1 of the base station 210A of the first network 200A, and is in the RRC idle state or RRC inactive state in the cell C2 of the base station 210B of the second network 200B. shall be UE 100 has established an RRC connection in cell C1 belonging to the first frequency band in first network 200A.
  • UE 100 uses first receiver 121A for communication with first network 200A. The first receiver 121A receives radio signals in the first frequency band.
  • the UE 100 is located (that is, camped) in the cell C2 belonging to the first frequency band or the second frequency band in the second network 200B.
  • the second receiver 121B receives radio signals in the second frequency band.
  • cell C2 is a serving cell in the second network 200B.
  • Step S101 The UE 100 measures communication quality in the second network 200B.
  • the UE 100 (control unit 130) may measure the communication quality (for example, received power, received quality, etc.) used in the selection operation in step S102 described later for each frequency.
  • the UE 100 (control unit 130) may measure communication quality at frequencies higher than the priority of cell C2.
  • Step S102 The UE 100 performs selection operation to select a camp-on cell in the second network 200B. Details of the selection operation will be described later.
  • Step S103 UE 100 is located in a cell belonging to the second frequency band. Specifically, UE 100 (control unit 130) is located in a cell belonging to the second frequency band, which is the cell selected in the selection operation, as cell C2 in second network 200B. UE 100 (second receiving unit 121B) residing in cell C2 monitors paging, for example. Paging monitoring is to check whether or not there is paging addressed to UE 100 by receiving a PDCCH (Physical Downlink Control CHannel) from base station 210B of second network 200B. Since UE 100 (control unit 130) uses second receiving unit 121B for communication with second network 200B, it is possible to monitor paging from second network 200B while maintaining communication with first network 200A.
  • PDCCH Physical Downlink Control CHannel
  • FIG. 4 Next, a selection operation example will be described with reference to FIGS. 4 and 7.
  • FIG. 4
  • Step S201 UE 100 (control unit 130) determines whether or not first receiving unit 121A is used for communication with first network 200A. When the UE 100 (the control unit 130) determines that the first reception unit 121A is used for communication with the first network 200A (YES), the UE 100 (control unit 130) executes the process of step S202. When the UE 100 (control unit 130) determines that the first reception unit 121A is not used for communication with the first network 200A (NO), it executes the process of step S203.
  • the UE 100 may determine that the first receiving unit 121A is used for communication with the first network 200A in at least one of the following cases.
  • the first receiver 121A receives a radio signal from the base station 210A of the first network 200A.
  • the first receiver 121A monitors radio signals from the base station 210A of the first network 200A.
  • the UE 100 is in one of the RRC connected state, RRC idle state, and RRC inactive state.
  • the UE 100 is performing location registration with the first network 200A.
  • the state in which the UE 100 has found a suitable cell that is, the state in which the UE 100 is located (that is, camps) in a suitable cell.
  • the UE 100 may determine that the first reception unit 121A is not used for communication with the first network 200A in at least one of the following cases.
  • the first receiver 121A cannot receive a radio signal from the base station 210A of the first network 200A.
  • the UE 100 has not performed location registration with the first network 200A.
  • - UE 100 is in a state where it has not found a suitable cell (for example, "Any Cell Selection" state), that is, it is not located in a suitable cell.
  • Step S202 UE 100 (control unit 130) prioritizes cells belonging to the second frequency band in which second receiving unit 121B receives radio signals over cells belonging to the first frequency band in which first receiving unit 121A receives radio signals. to perform priority control for selection.
  • the UE 100 (control unit 130) may perform at least one of the following (a) to (j) as priority control.
  • the first frequency band includes frequency A and frequency B and the second frequency band includes frequency B and frequency C will be described as an example.
  • the “frequency” here is the frequency indicated by the frequency identifier received from the base station 210B.
  • Frequency may be a frequency whose communication quality is measured by the UE 100.
  • (a) UE 100 (control unit 130) regards the priority of frequencies included in the first frequency band as lower priority than the priority of frequencies included in the second frequency band.
  • the frequencies included in the first frequency band may be all frequencies included in the first frequency band, or may be some frequencies included in the first frequency band.
  • the UE 100 (control unit 130) regards the priority of frequency A as lower than the priority of frequency C.
  • the UE 100 (control unit 130) may consider the priority of frequency B to be lower than the priority of frequency C.
  • the priority of the frequency included in the first frequency band when a plurality of frequencies are included in the second frequency band, the priority of the frequency included in the first frequency band, among the priority of a plurality of frequencies included in the second frequency band It may be considered a lower priority than the lowest priority.
  • UE 100 sets the priority of a frequency (hereinafter referred to as a first non-overlapping frequency as appropriate) that does not overlap with the second frequency band among the frequencies included in the first frequency band to the second It may be regarded as a priority lower than the priority of frequencies included in the frequency band.
  • the first non-overlapping frequencies may be all frequencies included in the first frequency band that do not overlap with the second frequency band, or may be all frequencies included in the first frequency band that do not overlap with the second frequency band. It may be some frequencies that do not overlap with the frequency band.
  • the UE 100 (control unit 130) regards the priority of frequency A as lower than the priority of frequency C.
  • UE 100 (control unit 130) maintains the priority of frequency B without considering the priority of frequency B to be lower than the priority of frequency C.
  • UE 100 (control unit 130) regards the priority of frequencies included in the first frequency band as the lowest priority.
  • the frequencies included in the first frequency band may be all frequencies included in the first frequency band, or may be some frequencies included in the first frequency band.
  • the UE 100 (control unit 130) regards the priority of frequency A as the lowest priority.
  • UE 100 (control unit 130) may regard the priority of frequency B as the lowest priority.
  • UE 100 (control unit 130) regards the priority of the frequency used for communication with first network 200A among the frequencies included in the first frequency band as the lowest priority. Specifically, when UE 100 (control unit 130) uses frequency A for communication with first network 200A, UE 100 regards the priority of frequency A as the lowest priority.
  • UE 100 (control unit 130) regards the priority of a frequency (first non-overlapping frequency) that does not overlap with the second frequency band among the frequencies included in the first frequency band as the lowest priority.
  • the first non-overlapping frequencies may be all frequencies included in the first frequency band that do not overlap with the second frequency band, or may be all frequencies included in the first frequency band that do not overlap with the second frequency band. It may be some frequencies that do not overlap with the frequency band.
  • the UE 100 (control unit 130) regards the priority of frequency A as the lowest priority.
  • UE 100 (control unit 130) maintains the priority of frequency B without regarding the priority of frequency B as the lowest priority.
  • UE 100 (control unit 130) regards the priority of frequencies included in the second frequency band as higher priority than the priority of frequencies included in the first frequency band.
  • the frequencies included in the second frequency band may be all frequencies included in the second frequency band, or may be some frequencies included in the second frequency band.
  • the UE 100 (control unit 130) considers the priority of frequency C to be higher than the priority of frequency A.
  • the UE 100 (control unit 130) may consider the priority of frequency B to be higher than the priority of frequency A.
  • UE 100 When multiple frequencies are included in the first frequency band, UE 100 (control unit 130) sets the priority of the frequency included in the second frequency band to the highest among the priorities of the multiple frequencies included in the first frequency band. It may be considered a higher priority than a higher priority.
  • (g) UE 100 sets the priority of the frequency included in the second frequency band to a frequency that does not overlap with the second frequency band among the frequencies included in the first frequency band (that is, the first non- duplicate frequencies).
  • the frequencies included in the second frequency band may be all frequencies included in the second frequency band, or may be some frequencies included in the second frequency band.
  • the UE 100 (control unit 130) considers the priority of frequency C to be higher than the priority of frequency A, for example.
  • UE 100 (control unit 130) may regard the priority of frequency B as a higher priority than the priority of frequency A, for example.
  • UE 100 (control unit 130) regards the priority of frequencies included in the second frequency band as the highest priority.
  • the frequencies included in the second frequency band may be all frequencies included in the second frequency band, or may be some frequencies included in the second frequency band.
  • UE 100 (control unit 130) may regard the priority of frequency B as the highest priority.
  • UE 100 (i) UE 100 (control unit 130) regards cells belonging to the first frequency as prohibited cells that are prohibited from being selected as camp-on cells.
  • a list of forbidden cells may be referred to as a blacklist.
  • UE 100 (control unit 130) regards cells belonging to frequency A as prohibited cells.
  • UE 100 (control unit 130) may regard cells belonging to frequency B as prohibited cells.
  • UE 100 (control unit 130) regards cells belonging to frequencies included in the first frequency band that do not overlap with the second frequency band (that is, first non-overlapping frequencies) as prohibited cells. Specifically, UE 100 (control unit 130) regards cells belonging to frequency A as prohibited cells.
  • the UE 100 performs normal cell selection operation or cell reselection operation after performing the above-described priority control.
  • UE 100 for example, makes the priority of frequencies included in the first frequency band relatively lower than the priority of frequencies included in the second frequency band by priority control. This makes it easier for UE 100 (control unit 130) to preferentially select cells belonging to the second frequency band over cells belonging to the first frequency band.
  • Step S203 UE 100 (control unit 130) performs normal cell selection operation or cell reselection operation.
  • the first network 200A and base station 210A may be read as cell C1 (first cell), and the first network 200A and base station 210A may be read as cell C2 (second cell). good too.
  • the number of receiving units 121 may be three or more.
  • the number of transmission units 122 may be one, or may be three or more.
  • the first frequency band may indicate the frequency range supported by the first receiving unit 121A, that is, the range of frequencies in which radio signals are received by the first receiving unit 121A. It may indicate the frequency range supported by the receiver 121B, that is, the frequency range in which the second receiver 121B receives radio signals.
  • Each of the first frequency band (ie, the frequency range supported by the first receiving unit 121A) and the second frequency band (ie, the frequency range supported by the second receiving unit 121B) may be configured by one frequency band. It may well consist of multiple frequency bands.
  • the first frequency band and the second frequency band may not overlap. That is, the first frequency band and the second frequency band may be separated on the frequency axis.
  • the first receiver 121A supports reception of radio signals in one of frequency ranges FR1 (Frequency Range 1) and FR2 (Frequency Range 2)
  • the second receiver 121B supports the reception of radio signals in the other frequency domain.
  • FR1 is the frequency band in the range 450-6000 Mhz.
  • FR2 is the frequency band in the range 24250-52600 MHz.
  • an offset value may be added to the communication quality as priority control.
  • the UE 100 control unit 130
  • the UE 100 adds a positive offset value to the communication quality measured in the frequency included in the second frequency band, thereby increasing the communication quality compared with the reference in the selection operation.
  • the UE 100 determines that the first receiving unit 121A is used for communication with the first network 200A when in the RRC connected state, and the RRC idle state Alternatively, it may be determined that the first receiver 121A is not used for communication with the first network 200A when it is in the RRC inactive state.
  • 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.

Landscapes

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

Abstract

Un équipement utilisateur (100) pour communiquer avec une pluralité de réseaux (200A, 200B) à l'aide d'une pluralité de modules d'identification d'abonné (111, 112) est pourvu : d'une première unité de réception (120A) pour recevoir un signal sans fil dans une première bande de fréquence ; d'une seconde unité de réception (120B) pour recevoir un signal sans fil dans une seconde bande de fréquence ; et d'une unité de commande (130) qui, si la première unité de réception (120A) est utilisée pour une communication avec un premier réseau (200A) inclus dans la pluralité de réseaux (200A, 200B), réalise une commande préférentielle où, pendant une opération de sélection pour sélectionner une cellule mise en attente dans laquelle le dispositif utilisateur (100) est desservi dans un second réseau (200B) inclus dans la pluralité de réseaux (200A, 200B), une cellule appartenant à la seconde bande de fréquence est sélectionnée de préférence sur une cellule appartenant à la première bande de fréquence.
PCT/JP2022/017491 2021-04-16 2022-04-11 Équipement utilisateur et procédé de commande de communication WO2022220218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-069648 2021-04-16
JP2021069648A JP2022164264A (ja) 2021-04-16 2021-04-16 ユーザ装置及び通信制御方法

Publications (1)

Publication Number Publication Date
WO2022220218A1 true WO2022220218A1 (fr) 2022-10-20

Family

ID=83640096

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/017491 WO2022220218A1 (fr) 2021-04-16 2022-04-11 Équipement utilisateur et procédé de commande de communication

Country Status (2)

Country Link
JP (1) JP2022164264A (fr)
WO (1) WO2022220218A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014504841A (ja) * 2011-02-03 2014-02-24 クゥアルコム・インコーポレイテッド 複数のｓｉｍをサポートするデバイスの動作
JP2015504291A (ja) * 2012-01-20 2015-02-05 クアルコム，インコーポレイテッド デュアルスタンバイデュアル加入者識別モジュール（ｄｓｄｓ）におけるモビリティの検出およびシステムの取得
JP2018501692A (ja) * 2014-11-18 2018-01-18 クアルコム，インコーポレイテッド ユーザアクティビティに基づくマルチｓｉｍデバイスのｓｉｍによるアウトオブサービス状態からの回復を向上させるためのシステムおよび方法
JP2019507977A (ja) * 2016-02-08 2019-03-22 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 無線通信ネットワークにおいてセルおよび無線アクセス技術を選択するための通信デバイスおよびそこにおける方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014504841A (ja) * 2011-02-03 2014-02-24 クゥアルコム・インコーポレイテッド 複数のｓｉｍをサポートするデバイスの動作
JP2015504291A (ja) * 2012-01-20 2015-02-05 クアルコム，インコーポレイテッド デュアルスタンバイデュアル加入者識別モジュール（ｄｓｄｓ）におけるモビリティの検出およびシステムの取得
JP2018501692A (ja) * 2014-11-18 2018-01-18 クアルコム，インコーポレイテッド ユーザアクティビティに基づくマルチｓｉｍデバイスのｓｉｍによるアウトオブサービス状態からの回復を向上させるためのシステムおよび方法
JP2019507977A (ja) * 2016-02-08 2019-03-22 テレフオンアクチーボラゲット エルエム エリクソン（パブル） 無線通信ネットワークにおいてセルおよび無線アクセス技術を選択するための通信デバイスおよびそこにおける方法

Also Published As

Publication number Publication date
JP2022164264A (ja) 2022-10-27

Similar Documents

Publication Publication Date Title
US10028331B2 (en) User terminal, communication control method and chipset
US10425802B2 (en) Radio terminal and base station
EP3276870A1 (fr) Station de base et son procédé de commande
WO2016031662A1 (fr) Station de base, et équipement de terminaison de lan sans fil
WO2022220218A1 (fr) Équipement utilisateur et procédé de commande de communication
WO2022220219A1 (fr) Dispositif utilisateur, dispositif de station de base et procédé de contrôle de communication
WO2022234795A1 (fr) Dispositif de communication et procédé de communication
JP2022172830A (ja) ユーザ装置及び通信制御方法
WO2022209906A1 (fr) Équipement utilisateur, station de base et procédé de commande de communication
WO2024071081A1 (fr) Dispositif de communication, station de base et procédé de communication
WO2022209905A1 (fr) Dispositif utilisateur, station de base et procédé de commande de communication
WO2024071080A1 (fr) Station de base, dispositif de communication et procédé de communication
WO2022220220A1 (fr) Équipement utilisateur, station de base, et procédé de commande de communication
WO2024071079A1 (fr) Station de base et procédé de communication
WO2022224861A1 (fr) Équipement utilisateur et procédé de commande de communication
JP7111899B2 (ja) 通信制御方法
WO2023276832A1 (fr) Dispositif utilisateur, dispositif de station de base et procédé de contrôle de communication
US20230422074A1 (en) User equipment, base station, and communication control method
WO2024019062A1 (fr) Dispositif et procédé de communication, et station de base
WO2023276830A1 (fr) Station de base et procédé de commande de communication
JP2022169959A (ja) ユーザ装置、基地局、及びセル再選択方法
JP2023006094A (ja) ユーザ装置、基地局及び通信制御方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22788143

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22788143

Country of ref document: EP

Kind code of ref document: A1