WO2024202067A1 - 端末、ネットワークノード装置、及び通信方法 - Google Patents
端末、ネットワークノード装置、及び通信方法 Download PDFInfo
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- WO2024202067A1 WO2024202067A1 PCT/JP2023/013718 JP2023013718W WO2024202067A1 WO 2024202067 A1 WO2024202067 A1 WO 2024202067A1 JP 2023013718 W JP2023013718 W JP 2023013718W WO 2024202067 A1 WO2024202067 A1 WO 2024202067A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/18—Selecting a network or a communication service
Definitions
- the present invention relates to a terminal, a network node device, and a communication method in a wireless communication system.
- 5G Fifth Generation Partnership Project
- 5G New Radio
- 5G various wireless technologies are being considered to meet the requirements of achieving a throughput of 10 Gbps or more while keeping latency in wireless sections to 1 ms or less.
- NR has introduced a network architecture including 5GC (5G Core Network), which corresponds to EPC (Evolved Packet Core), the core network in the network architecture of LTE (Long Term Evolution), and NG-RAN (Next Generation-Radio Access Network), which corresponds to E-UTRAN (Evolved Universal Terrestrial Radio Access Network), the RAN (Radio Access Network) in the network architecture of LTE (for example, non-patent document 1).
- 5GC 5G Core Network
- EPC Evolved Packet Core
- LTE Long Term Evolution
- NG-RAN Next Generation-Radio Access Network
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- RAN Radio Access Network
- HPLMN Home Public Land Mobile Networks
- VPLMN Vehicle Land Mobile Networks
- Slice-based SOR is a mechanism that enables terminal 20 to select a VPLMN to connect to at a roaming destination according to the slices supported by each VPLMN at the roaming destination.
- a terminal when a terminal applies slice-based SOR, it performs a transition from the currently connected network to another network in order to connect to the slice it wants to use. During this transition, there is a possibility that the service being communicated on the currently connected network may be disconnected.
- the present invention has been made in consideration of the above points, and aims to provide a technology that enables a terminal to control the timing of transition from the network it is connected to to another network in order to connect to a slice that it wants to use.
- a receiving unit receives, from a network, instruction information having information regarding a timing at which a transition operation should be performed for each piece of reference information;
- a terminal is provided which includes: a control unit which, when it is determined that it is necessary to connect to a specific slice in a destination network other than the currently connected network, executes a transition to the destination network at a timing based on the instruction information.
- the disclosed technology provides a technology that allows a terminal to control the timing of transition from the network to which it is connected to another network in order to connect to a slice that the terminal wishes to use.
- FIG. 1 is a diagram illustrating an example of a communication system.
- FIG. 1 is a diagram for explaining an example of a communication system in a roaming environment. This is a diagram to explain an example of operation based on slice-based SOR.
- FIG. 13 is a diagram showing an example of information (excerpt from C1-230543) notified to terminal 20.
- FIG. 11 is a diagram showing an operation of information notification. A figure showing an example of URSP rules with flags added. 4 is a flowchart of a process executed by the terminal 20 in the first embodiment.
- FIG. 11 is a diagram for explaining a modified example of the first embodiment. This is a sequence diagram showing a method for notifying new URSP rules.
- FIG. 13 is a diagram showing an example of information (excerpt from C1-230543) notified to terminal 20.
- FIG. 11 is a diagram showing an operation of information notification.
- a figure showing an example of URSP rules with flags added. 4 is a flowchar
- FIG. 13 is a diagram showing an example of SoR-CMCI in which new criteria are set.
- 10 is a flowchart of a process executed by the terminal 20 in the second embodiment.
- FIG. 13 is a diagram for explaining a modified example of the second embodiment.
- FIG. 11 is a sequence diagram showing a method of notifying new SoR-CMCI.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a network node device 30 according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention.
- FIG. 2 is a diagram illustrating an example of a hardware configuration of an apparatus according to an embodiment of the present invention.
- 1 is a diagram showing an example of a configuration of a vehicle according to an embodiment of the present invention.
- existing technologies are used as appropriate.
- the existing technologies are, for example, existing LTE or existing NR (5G), but are not limited to existing LTE or existing NR.
- all message names used in the following explanations are examples.
- all network node device names used in the following explanations are examples.
- Fig. 1 is a diagram for explaining an example of a communication system.
- the communication system is composed of a UE, which is a terminal 20, and multiple network node devices.
- a UE which is a terminal 20
- multiple network node devices it is assumed that one network node device corresponds to each function, but multiple functions may be realized by one network node device, or multiple network node devices may realize one function.
- the "connection" described below may be a logical connection or a physical connection.
- RAN Radio Access Network
- AMF Access and Mobility Management Function
- UPF User plane function
- AMF Access and Mobility Management Function
- UPF User plane function
- AMF is a network node device having functions such as RAN interface termination, NAS (Non-Access Stratum) termination, registration management, connection management, reachability management, mobility management, etc.
- UPF is a network node device having functions such as PDU (Protocol Data Unit) session point to the outside that interconnects with DN (Data Network), packet routing and forwarding, and user plane QoS (Quality of Service) handling.
- PDU Protocol Data Unit
- DN Data Network
- the AMF is connected to the UE, RAN, SMF (Session Management function), NSSF (Network Slice Selection Function), NEF (Network Exposure Function), NRF (Network Repository Function), UDM (Unified Data Management), UDR (Unified Data Repository), AUSF (Authentication Server Function), PCF (Policy Control Function), and AF (Application Function).
- the AMF, SMF, NSSF, NEF, NRF, UDM, UDR, AUSF, PCF, and AF are network node devices that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nudr, Nausf, Npcf, and Naf.
- the SMF is a network node device having functions such as session management, IP (Internet Protocol) address allocation and management for UEs, DHCP (Dynamic Host Configuration Protocol) function, ARP (Address Resolution Protocol) proxy, and roaming function.
- the NEF is a network node device having a function of notifying other NFs (Network Functions) of capabilities and events.
- the NSSF is a network node device having functions such as selecting the network slice to which the UE connects, determining the allowed NSSAI (Network Slice Selection Assistance Information), determining the NSSAI to be set, and determining the AMF set to which the UE connects.
- the PCF is a network node device having a function of controlling network policies.
- the AF is a network node device having a function of controlling application servers.
- the NRF is a network node device having a function of discovering NF instances that provide services.
- the UDM is a network node device that manages subscriber data, authentication data, etc. The UDM also stores (manages) dynamic information according to the connection status of the terminal 20, etc.
- the UDM is connected to a UDR (User Data Repository) that holds data.
- FIG. 2 is a diagram for explaining an example of a communication system in a roaming environment.
- the network is composed of a UE, which is a terminal 20, and multiple network node devices.
- the RAN is a network node device with radio access functions, and is connected to the UE, AMF, and UPF.
- the AMF is a network node device with functions such as RAN interface termination, NAS termination, registration management, connection management, reachability management, and mobility management.
- the UPF is a network node device with functions such as a PDU session point to the outside that interconnects with the DN, packet routing and forwarding, and user plane QoS handling.
- the UPF and DN constitute a network slice. In the wireless communication network in the embodiment of the present invention, multiple network slices are constructed.
- the AMF is connected to the UE, RAN, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, AF, and SEPP (Security Edge Protection Proxy).
- the AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network node devices that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.
- the SMF is a network node device having functions such as session management, UE IP address allocation and management, DHCP function, ARP proxy, and roaming function.
- the NEF is a network node device having a function of notifying other NFs of capabilities and events.
- the NSSF is a network node device having functions such as selecting a network slice to which a UE connects, determining an allowed NSSAI, determining an NSSAI to be set, and determining an AMF set to which a UE connects.
- the PCF is a network node device having a function of performing network policy control.
- the AF is a network node device having a function of controlling application servers.
- the NRF is a network node device having a function of discovering NF instances that provide services.
- the SEPP is a non-transparent proxy that filters control plane messages between PLMNs (Public Land Mobile Networks).
- the vSEPP shown in Figure 2 is a SEPP in the visited network
- the UE is in a roaming environment connected to the RAN and AMF in the VPLMN (Visited PLMN).
- the VPLMN and the HPLMN (Home PLMN) are connected via vSEPP and hSEPP.
- the UE can communicate with the UDM of the HPLMN, for example, via the AMF of the VPLMN.
- the first and second embodiments are described below.
- the first and second embodiments may be implemented in combination or independently.
- a terminal 20 subscribes to a network of a home operator (HPLMN: Home Public Land Mobile Network), the network of the operator in which the terminal 20 roams is located is called a Visited PLMN (VPLMN).
- HPLMN Home Public Land Mobile Network
- VPLMN Visited PLMN
- terminal 20 has roamed from HPLMN50, which is the home operator's network, and is connected to VPLMN1, which is the roaming destination network.
- terminal 20 receives and retains information from HPLMN50 indicating that "VPLMN2 supports slice A, and VPLMN1 does not support slice A.”
- terminal 20 connected to VPLMN1 launches application X that uses slice A, for example, it determines that it is necessary to use slice A and, based on the above information, decides to change (transition) its connection destination from VPLMN1, which does not support slice A, to VPLMN2, which supports slice A. In accordance with this decision, terminal 20 disconnects from VPLMN1 and connects to VPLMN2.
- Figure 3 shows location registration, which is part of the connection process.
- the above transition operation allows terminal 20 to use slice A to receive services provided by application X.
- Non-Patent Document 3 states that "For a roaming UE activating a service/application requiring a network slice not offered by the serving network but available in the area from other network(s), the HPLMN shall be able to provide the UE with prioritization information of the VPLMNs with which the UE may register for the network slice.”
- the operation shown in Figure 3 is an example of an operation based on the contents of this description.
- 3GPP registered trademark proposes (C1-230543) that the NW (network) notify the terminal 20 of the following information.
- S-NSSAI is a slice identifier.
- the terminal 20 holding the above information wants to use multiple slices, for example, it decides which VPLMN to use based on the sum of the slices that the terminal 20 wants to use and the weight values associated with them for each VPLMN, across all slices that the terminal 20 wants to use. Assuming that the terminal 20 wants to use the three slices shown in Figure 4, C1-230543 shows the following calculation example.
- x indicates that the slice is not supported in the VPLMN, and x is set to, for example, 10. In the above calculation example, if the terminal 20 selects the VPLMN with the highest priority, select VPLMN 1.
- the above-mentioned conventional proposed method employs weighting of VPLMN based on the slice that the terminal 20 wants to use.
- this method does not distinguish between, for example, a case where an important application used in the terminal 20 wants to use a certain slice A and a case where an unimportant application wants to use slice A, and treats them the same.
- non-critical application is, for example, an application that does not need to be used if using it would require a VPLMN switch.
- a “non-critical application” is an application that is not worth interrupting communication with an application in use in the currently connected VPLMN.
- the NW (specifically, the network node device 30) notifies the terminal 20 of information indicating to what application the Slice based SoR should be applied.
- the information is called Slice based SoR related information.
- the network node device 30 may be the network node device 30 of the HPLMN of the terminal 20, or may be the network node device 30 of the VPLMN of the roaming destination.
- the above Slice-based SoR related information may be any type of information.
- the Slice-based SoR related information may be information in the existing specifications to which information related to solutions to problems has been added, or it may be information not included in the existing specifications.
- Slice-based SoR related information for example, information in which a flag (flag information) indicating whether or not Slice-based SOR should be applied to the S-NSSAI specified in the Route selection descriptor in the URSP (UE Route Selection Policy) rule notified by the NW to the terminal 20 is added can be used.
- a flag flag information
- URSP UE Route Selection Policy
- an individual rule is described as a URSP rule, and multiple rules are described as URSP rules.
- an existing URSP rule with a flag added may be called an "URSP rule”
- the part other than the flag in an existing URSP rule with a flag added may be called an "URSP rule".
- a URSP rule is a rule that describes which slice should be used for each traffic of a terminal 20, and is composed of a Traffic descriptor and a Route selection descriptor.
- Figure 6 shows an example of URSP rules with the above-mentioned flags.
- Figure 6 shows the URSP rules with flags in table format, but this format is just one example. URSP rules with flags do not have to be in table format. In the example in Figure 6, two values, TRUE or FALSE, are assigned as flags.
- a terminal 20 that holds URSP rules with a flag attached attempts to connect to a slice (say slice A) based on the URSP rules, if slice A is not supported by the currently connected network, the terminal 20 performs the following operations.
- terminal 20 applies Slice-based SoR to the S-NSSAI (i.e., slice A) specified in the Route selection descriptor.
- the terminal 20 simply ignores the URSP rule and uses another applicable URSP rule. For example, if the other applicable URSP rule is a rule that indicates the use of the slice currently in use, the terminal 20 continues to use the current network without performing a network transition.
- the terminal 20 launches a certain application (called application X). Based on the flagged URSP rules, the terminal 20 determines that a certain slice (called slice Y) should be used for application X.
- slice Y a certain slice
- the terminal 20 determines whether slice Y is supported in the currently connected network based on the slice support information. If slice Y is supported in the currently connected network (Yes in S202), the terminal 20 continues the connection to the current network (terminating the processing related to Slice-based SoR).
- the terminal 20 determines whether the flag for slice Y is TRUE or not based on the flagged URSP rule.
- the terminal 20 applies Slice-based SoR. In other words, the terminal 20 performs a transition from the current NW to a NW (VPLMN) that supports slice Y.
- NW NW
- the flag is a binary TRUE/FALSE value associated with each URSP rule, but is not limited to this.
- a numerical value e.g., a real number between 0 and 1 may be used as the flag associated with each URSP rule.
- This numerical value may be a weight value indicating the priority or importance of the associated URSP rule.
- the terminal 20 judges to apply Slice-based SoR, as in the case of TRUE, and if the flag value is less than the threshold (or equal to or greater than the threshold), it judges to apply another rule, as in the case of FALSE.
- the threshold is, for example, set in advance from the NW to the terminal 20. The threshold may be different for each terminal.
- the numerical value may be a value that is intended for calculation such as multiplication with the weight value (e.g., the table in Figure 4) proposed in the previously mentioned existing technology (C1-230543).
- Figure 8 shows an example of the URSP rules in this case and the table proposed in C1-230543.
- terminal 20 determines that it should use slice S-NSSAI 1.
- the method proposed in C1-230543 is used to determine which VPLMN should be selected (which VPLMN should be prioritized).
- the flags (weights) in the URSP rules are used for multiplication in the calculations in the method proposed in C1-230543.
- terminal 20 when terminal 20 calculates the priority value for VPLMN1, it calculates the value of the term corresponding to the slice of S-NSSAI 1 as "0.4*0.5*1".
- the method of notifying the flagged URSP rules (called new URSP rules) is not limited to a specific method. As shown in Fig. 5, the new URSP rules may be notified to the terminal 20 from any network node device 30. In addition, the new URSP rules may be notified to the terminal 20 when the terminal 20 is present in the HPLMN, or may be notified when the terminal 20 is present in the VPLMN. A specific example will be described below.
- Slice based SoR information (such as information on slices supported by each VPLMN) can be notified from the NW to the terminal 20, for example, in a Registration Accept in the sequence shown in Figure C.2.1 of non-patent document 2 (3GPP TS 23.122) or in a DL NAS TRANSPORT in the sequence shown in Figure C.3.1 of the same document.
- the new URSP rules in the first embodiment may be notified from the AMF to the terminal 20 in the DL NAS TRANSPORT procedure in step-3 in Figure 4.2.4.3-1 of Non-Patent Document 1 (3GPP TS 23.502), or may be notified in the Registration Accept or DL NAS TRANSPORT at the same timing as the above Slice based SoR information.
- Figure 9 shows an example of a sequence showing a method for notifying new URSP rules. This sequence is based on Figure C.2.1 (S301 to S305) and Figure C.3.1 (S306 to S307) of non-patent document 2 (3GPP TS 23.122). For ease of illustration, new URSP rules are referred to as "new URSP" in Figure 9.
- HPLMN50 in FIG. 9 is a network node device (e.g., UDM) in HPLMN50
- VPLMN60 is more specifically a network node device (e.g., AMF) in VPLMN60.
- UDM network node device
- AMF network node device
- terminal 20 sends a Registration Request to VPLMN 60.
- VPLMN 60 acquires new URSP rules from HPLMN 50.
- the new URSP rules may be acquired together with Slice based SoR information.
- the new URSP rules may not be acquired here, and may be acquired in S306.
- VPLMN 60 If VPLMN 60 acquires new URSP rules in S303, VPLMN 60 notifies terminal 20 of the new URSP rules together with Registration Accept in S304.
- the VPLMN 60 When notifying the terminal 20 of new URSP rules after the registration procedure, in S306, the VPLMN 60 obtains the new URSP rules from the HPLMN 50. In S307, the VPLMN 60 notifies the terminal 20 of the new URSP rules by DL NAS TRANSPORT.
- the first embodiment described above makes it possible to control whether or not Slice-based SoR is applicable depending on the application used by the terminal 20.
- the NW (specifically, the network node device 30) notifies the terminal 20 of Slice based SoR related information.
- the Slice based SoR related information in the second embodiment is rules used by a terminal 20 in Connected mode to determine the timing for implementing a PLMN change when switching operators using Slice based SoR.
- the Slice-based SoR related information may be any type of information.
- the Slice-based SoR related information may be information in the existing specifications to which information related to solutions to problems has been added, or it may be information not included in the existing specifications.
- slice-based SoR related information for example, information including new criteria and timers can be used in addition to the existing SoR-CMCI (Non-Patent Document 2 (3GPP TS 23.122) Annex C.4) notified to the terminal 20 by the NW.
- CMCI is an abbreviation for connected mode control information.
- the criteria may also be called "reference information.”
- the terminal 20 When the terminal 20 receives the SoR-CMCI in which the criteria are set, it applies a timer associated with that criteria to the Slice-based SoR and performs the PLMN change when the timer expires.
- FIG. 10 An example of SoR-CMCI in which a new criterion has been set is shown in Figure 10.
- Slice based SoR is set as the new criterion, and the timer (timer value) associated with it is set to 0 seconds.
- the terminal 20 decides to execute Slice based SoR (i.e., transition to another VPLMN)
- it starts (starts) the timer with that timer value
- the timer expires it executes the transition to the destination VPLMN.
- the timer value is 0 seconds
- the terminal 20 decides to execute a VPLMN transition, it immediately executes the VPLMN transition.
- the terminal 20 starts a certain application (called application X).
- application X a certain application
- slice Y a certain slice
- the URSP rule can be used for this determination.
- the terminal 20 determines whether slice Y is supported in the currently connected network based on the slice support information. If slice Y is supported in the currently connected network (Yes in S402), the terminal 20 continues the connection to the current network (terminating the processing related to Slice-based SoR).
- the terminal 20 executes a slice-based SoR (transition to a VPLMN that supports slice Y).
- timer timer value
- information specifying the timing at which the transition operation should be performed this is not limiting.
- Information other than a timer may be used as the information specifying the timing at which the transition operation should be performed.
- absolute time may be used as the information specifying the timing at which the transition operation should be performed.
- the timing of executing Slice-based SoR can be controlled by the above-mentioned SoR-CMCI (e.g., FIG. 10).
- SoR-CMCI e.g., FIG. 10
- the above-mentioned SoR-CMCI does not allow fine-grained control of the timing of executing Slice-based SoR for each service (or each application).
- information may be used in which, for each criterion defined in the existing SoR-CMCI (Annex C.4 of non-patent document 2 (3GPP TS 23.122)), a flag indicating whether or not each criterion should also be applied to a slice-based SoR is included in the SoR-CMCI.
- the flag is TRUE. This means that when the terminal 20 decides to execute Slice-based SoR while executing SMS, a 10-second timer is applied, SMS is continued for 10 seconds, and when the 10 seconds have elapsed, Slice-based SoR is executed (transition to another VPLMN that supports the desired slice).
- the terminal 20 decides to execute Slice-based SoR while executing SMS and MMTEL video services, it does not care about MMTEL video and applies a 10-second timer to SMS.
- the above timer may be the same as the existing T SoR CMCI timer defined in Non-Patent Document 2 (TS 23.122), or may be a different timer.
- the method of notifying the SoR-CMCI (called new SoR-CMCI) in the second embodiment is not limited to a specific method.
- the new SoR-CMCI may be notified to the terminal 20 from any network node device 30.
- the new SoR-CMCI may be notified to the terminal 20 when the terminal 20 is present in the HPLMN, or may be notified when the terminal 20 is present in the VPLMN. A specific example will be described below.
- Slice based SoR information (such as information on slices supported by each VPLMN) can be notified from the NW to the terminal 20, for example, in a Registration Accept in the sequence shown in Figure C.2.1 of non-patent document 2 (3GPP TS 23.122) or in a DL NAS TRANSPORT in the sequence shown in Figure C.3.1 of the same document.
- the new SoR-CMCI in the second embodiment may be notified from the AMF to the terminal 20 in the DL NAS TRANSPORT procedure in step-3 in Figure 4.2.4.3-1 of Non-Patent Document 1 (3GPP TS 23.502), or may be notified in the Registration Accept or DL NAS TRANSPORT at the same timing as the above Slice based SoR information.
- Figure 13 shows an example of a sequence showing a method for notifying a new SoR-CMCI. This sequence is based on Figure C.2.1 (S301 to S305) and Figure C.3.1 (S306 to S307) of Non-Patent Document 2 (3GPP TS 23.122).
- HPLMN50 in FIG. 13 is a network node device (e.g., UDM) in HPLMN50
- VPLMN60 is more specifically a network node device (e.g., AMF) in VPLMN60.
- UDM network node device
- AMF network node device
- terminal 20 sends a Registration Request to VPLMN 60.
- VPLMN 60 acquires a new SoR-CMCI from HPLMN 50.
- the new SoR-CMCI may be acquired together with Slice based SoR information.
- the new SoR-CMCI may not be acquired here, and may be acquired in S506.
- VPLMN 60 acquires new SoR-CMCI in S503, in S504 VPLMN 60 notifies terminal 20 of the new SoR-CMCI together with Registration Accept.
- the VPLMN 60 acquires the new SoR-CMCI from the HPLMN 50.
- the VPLMN 60 notifies the terminal 20 of the new SoR-CMCI by DL NAS TRANSPORT.
- the terminal 20 can control the timing of executing Slice-based SoR.
- Network Node Device 30> 14 is a diagram illustrating an example of a functional configuration of the network node device 30.
- the network node device 30 may be any of the network node devices of the RAN (base station 10), the AMF, the SMF, the UPF, and the UDM, or may be a network node device other than these.
- the network node device 30 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140.
- the functional configuration shown in FIG. 14 is merely an example.
- the names of the functional divisions and functional units may be any as long as they can perform the operations related to the embodiment of the present invention.
- the transmitting unit 120 generates information to be transmitted to the terminal 20 or other network node devices, and transmits the information by wire or wirelessly.
- the receiving unit 120 receives various types of information transmitted from the terminal 20 or other network node devices.
- the setting unit 130 stores various setting information in a storage device and reads it from the storage device as needed.
- the control unit 140 controls the entire device.
- the functional units in the control unit 140 related to information transmission may be included in the transmission unit 110, and the functional units in the control unit 140 related to information reception may be included in the reception unit 120.
- the transmission unit 110 may be called a transmitter, and the reception unit 120 may be called a receiver.
- Fig. 15 is a diagram showing an example of the functional configuration of the terminal 20.
- the terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240.
- the functional configuration shown in Fig. 15 is merely an example. As long as the operation related to the embodiment of the present invention can be executed, the names of the functional divisions and functional units may be any.
- the transmitting unit 210 and the receiving unit 220 may be collectively referred to as a communication unit.
- the transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly.
- the receiver 220 receives various signals wirelessly and obtains higher layer signals from the received physical layer signals.
- the receiver 220 also has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, DCI via PDCCH, data via PDSCH, etc. transmitted from the base station.
- the transmitting unit 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), or the like to another terminal 20 as D2D communication, and the receiving unit 220 may receive a PSCCH, a PSSCH, a PSDCH, or a PSBCH, or the like, from the other terminal 20.
- a PSCCH Physical Sidelink Control Channel
- PSSCH Physical Sidelink Shared Channel
- PSDCH Physical Sidelink Discovery Channel
- PSBCH Physical Sidelink Broadcast Channel
- the setting unit 230 stores various setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads it from the storage device as necessary.
- the setting unit 230 also stores setting information that is set in advance.
- the control unit 240 controls the terminal 20.
- the functional units in the control unit 240 related to signal transmission may be included in the transmission unit 210, and the functional units in the control unit 240 related to signal reception may be included in the reception unit 220.
- the transmission unit 210 may be called a transmitter, and the reception unit 220 may be called a receiver.
- This embodiment discloses at least the following Supplementary Notes 1 and 2.
- ⁇ Appendix 1> a receiving unit that receives rule information indicating a slice to be used and flag information regarding a transition operation from a network for each application;
- a terminal comprising: a control unit that, when it is determined based on the rule information that it is necessary to connect to a specific slice in a destination network other than the currently connected network, determines whether to perform a transition to the destination network based on the flag information.
- the flag information is binary information indicating whether or not the transition operation is to be executed.
- the flag information is a real value indicating a weight of a slice in the rule information.
- control unit that generates rule information indicating a slice to be used and flag information regarding a transition operation for each application; a transmission unit that transmits the rule information and the flag information to a terminal, A network node device that, when it determines based on the rule information that it is necessary to connect to a specific slice in a destination network other than the currently connected network, determines based on the flag information whether to perform a transition to the destination network.
- Supplementary Items 1 to 5 provide technology that makes it possible to control the transition operation from a connected network to another network depending on the application used by the terminal.
- Supplementary Item 2 makes it possible to control the operation using binary information.
- Supplementary Item 3 makes it possible to control using weights.
- a receiving unit that receives, for each piece of reference information, instruction information having information regarding a timing at which a transition operation should be performed from a network;
- a terminal comprising: a control unit that, when it determines that it is necessary to connect to a specific slice in a destination network other than the currently connected network, executes a transition to the destination network at a timing based on the instruction information.
- the information regarding the timing is a timer value
- the control unit executes the transition to the transition destination network at the timing when a timer having a timer value corresponding to reference information indicating a transition operation expires.
- the instruction information includes, for each piece of reference information, information regarding a timing at which a transition action should be performed, and a flag indicating whether or not to apply a slice-based transition action;
- control unit that generates, for each piece of reference information, instruction information having information regarding a timing at which a transition operation should be performed;
- a transmission unit that transmits the instruction information to a terminal,
- a network node device that, when it determines that it is necessary to connect to a specific slice in a destination network other than the network currently connected, performs a transition to the destination network at a timing based on the instruction information.
- Supplementary Items 1 to 6 provide technology that allows a terminal to control the timing of transition from a connected network to another network in order to connect to a slice that the terminal wants to use.
- Supplementary Item 2 allows the transition operation to be controlled by a timer.
- Supplementary Item 2 allows the transition operation to be controlled according to the service being executed.
- each functional block may be realized using one device that is physically or logically coupled, or may be realized using two or more devices that are physically or logically separated and directly or indirectly connected (for example, using wires, wirelessly, etc.) and these multiple devices.
- the functional blocks may be realized by combining the one device or the multiple devices with software.
- Functions include, but are not limited to, judgement, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assignment.
- a functional block (component) that performs the transmission function is called a transmitting unit or transmitter.
- the network node device 30 and the terminal 20 in one embodiment of the present disclosure may function as a computer that performs processing of the communication method of the present disclosure.
- FIG. 16 is a diagram showing an example of the hardware configuration of the network node device 30 and the terminal 20 in one embodiment of the present disclosure.
- the network node device 30 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory device 1002, an auxiliary memory device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.
- the term "apparatus” may be interpreted as a circuit, device, unit, etc.
- the hardware configuration of the network node apparatus 30 and the terminal 20 may be configured to include one or more of the apparatuses shown in the figure, or may be configured to exclude some of the apparatuses.
- the functions of the network node device 30 and the terminal 20 are realized by loading specific software (programs) onto hardware such as the processor 1001 and the storage device 1002, causing the processor 1001 to perform calculations, control communications by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.
- the processor 1001 for example, operates an operating system to control the entire computer.
- the processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, registers, etc.
- CPU central processing unit
- control unit 140, control unit 240, etc. may be realized by the processor 1001.
- the processor 1001 reads out a program (program code), software module, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes according to the program.
- the program is a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment.
- the control unit 140 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the control unit 240 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001.
- the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
- the processor 1001 may be implemented by one or more chips.
- the program may be transmitted from a network via a telecommunication line.
- the storage device 1002 is a computer-readable recording medium and may be composed of, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc.
- the storage device 1002 may also be called a register, a cache, a main memory, etc.
- the storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method relating to one embodiment of the present disclosure.
- the auxiliary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray (registered trademark) disk), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, etc.
- the above-mentioned storage medium may be, for example, a database, a server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.
- the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, etc.
- the communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD).
- FDD Frequency Division Duplex
- TDD Time Division Duplex
- the transmitting/receiving antenna, an amplifier unit, a transmitting/receiving unit, a transmission path interface, etc. may be realized by the communication device 1004.
- the transmitting/receiving unit may be implemented as a transmitting unit or a receiving unit that is physically or logically separated.
- the input device 1005 is an input device (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
- the output device 1006 is an output device (e.g., a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one structure (e.g., a touch panel).
- each device such as the processor 1001 and the storage device 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured using a single bus, or may be configured using different buses between each device.
- the network node device 30 and the terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc., and some or all of the functional blocks may be realized by the hardware.
- the processor 1001 may be implemented using at least one of these pieces of hardware.
- the network node device 30 or the terminal 20 may also be provided in the vehicle 2001.
- FIG. 17 shows an example of the configuration of the vehicle 2001.
- the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013.
- the network node device 30 or the terminal 20 according to each aspect/embodiment described in this disclosure may be applied to a communication device mounted on the vehicle 2001, for example, to the communication module 2013.
- the drive unit 2002 is composed of, for example, an engine, a motor, or a hybrid of an engine and a motor.
- the steering unit 2003 includes at least a steering wheel (also called a handlebar), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.
- the electronic control unit 2010 is composed of a microprocessor 2031, memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001.
- the electronic control unit 2010 may also be called an ECU (Electronic Control Unit).
- Signals from the various sensors 2021-2029 include a current signal from a current sensor 2021 that senses the motor current, a front and rear wheel rotation speed signal obtained by a rotation speed sensor 2022, a front and rear wheel air pressure signal obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.
- the information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various information such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices.
- the information service unit 2012 uses information acquired from an external device via the communication module 2013 or the like to provide various multimedia information and multimedia services to the occupants of the vehicle 2001.
- the information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that perform output to the outside.
- input devices e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.
- output devices e.g., a display, a speaker, an LED lamp, a touch panel, etc.
- the driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driving burden on the driver, such as a millimeter wave radar, LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high definition (HD) maps, autonomous vehicle (AV) maps, etc.), a gyro system (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices.
- the driving assistance system unit 2030 transmits and receives various information via the communication module 2013 to realize driving assistance functions or autonomous driving functions.
- the communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port.
- the communication module 2013 transmits and receives data via the communication port 2033 between the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided on the vehicle 2001.
- the communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with an external device. For example, it transmits and receives various information to and from the external device via wireless communication.
- the communication module 2013 may be located either inside or outside the electronic control unit 2010.
- the external device may be, for example, a base station, a mobile station, etc.
- the communication module 2013 may transmit at least one of the signals from the various sensors 2021-2028 described above input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication.
- the electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input.
- the PUSCH transmitted by the communication module 2013 may include information based on the above input.
- the communication module 2013 receives various information (traffic information, signal information, vehicle distance information, etc.) transmitted from an external device, and displays it on the information service unit 2012 provided in the vehicle 2001.
- the information service unit 2012 may be called an output unit that outputs information (for example, outputs information to a device such as a display or speaker based on the PDSCH (or data/information decoded from the PDSCH) received by the communication module 2013).
- the communication module 2013 also stores various information received from an external device in a memory 2032 that can be used by the microprocessor 2031.
- the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.
- the operations of multiple functional units may be physically performed by one part, or the operations of one functional unit may be physically performed by multiple parts.
- the order of the processing procedures described in the embodiment may be changed as long as there is no contradiction.
- the network node device 30 and the terminal 20 have been described using functional block diagrams, but such devices may be realized by hardware, software, or a combination thereof.
- the software operated by the processor possessed by the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor possessed by the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.
- the notification of information is not limited to the aspects/embodiments described in the present disclosure and may be performed using other methods.
- the notification of information may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination of these.
- RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.
- Each aspect/embodiment described in this disclosure is a mobile communication system that is compatible with LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Ra).
- the present invention may be applied to at least one of systems using IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other appropriate systems, and next-generation systems that are expanded, modified, created, or defined based on these. It may also be applied to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.).
- certain operations that are described as being performed by the base station 10 may in some cases be performed by its upper node.
- various operations performed for communication with a terminal 20 may be performed by at least one of the base station 10 and other network nodes other than the base station 10 (such as, but not limited to, an MME or S-GW).
- the base station 10 may be a combination of multiple other network nodes (such as an MME and an S-GW).
- the information or signals described in this disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). They may be input and output via multiple network nodes.
- the input and output information may be stored in a specific location (e.g., memory) or may be managed using a management table.
- the input and output information may be overwritten, updated, or added to.
- the output information may be deleted.
- the input information may be sent to another device.
- the determination in this disclosure may be based on a value represented by one bit (0 or 1), a Boolean (true or false) value, or a comparison of numerical values (e.g., a comparison with a predetermined value).
- Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
- Software, instructions, information, etc. may also be transmitted and received via a transmission medium.
- a transmission medium For example, if the software is transmitted from a website, server, or other remote source using at least one of wired technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and/or wireless technologies (such as infrared, microwave), then at least one of these wired and wireless technologies is included within the definition of a transmission medium.
- wired technologies such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)
- wireless technologies such as infrared, microwave
- the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
- the data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.
- the channel and the symbol may be a signal (signaling).
- the signal may be a message.
- the component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.
- system and “network” are used interchangeably.
- a radio resource may be indicated by an index.
- the names used for the parameters described above are not intended to be limiting in any way. Furthermore, the formulas etc. using these parameters may differ from those explicitly disclosed in this disclosure.
- the various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by any suitable names, and therefore the various names assigned to these various channels and information elements are not intended to be limiting in any way.
- base station BS
- radio base station base station
- base station fixed station
- NodeB eNodeB
- gNodeB gNodeB
- access point e.g., "transmission point”
- gNodeB gNodeB
- a base station may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.
- a base station can accommodate one or more (e.g., three) cells.
- a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)).
- RRH Remote Radio Head
- the term "cell” or “sector” refers to a part or the entire coverage area of at least one of the base station and base station subsystems that provide communication services in this coverage.
- a base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.
- MS Mobile Station
- UE User Equipment
- a mobile station may also be referred to by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable terminology.
- At least one of the network node device 30 and the terminal 20 may be called a transmitting device, a receiving device, a communication device, etc.
- At least one of the network node device 30 and the terminal 20 may be a device mounted on a moving body, the moving body itself, etc.
- the moving body is a movable object, and the moving speed is arbitrary. It also includes the case where the moving body is stopped.
- the moving body includes, but is not limited to, for example, a vehicle, a transport vehicle, an automobile, a motorcycle, a bicycle, a connected car, an excavator, a bulldozer, a wheel loader, a dump truck, a forklift, a train, a bus, a handcart, a rickshaw, a ship and other watercraft, an airplane, a rocket, an artificial satellite, a drone (registered trademark), a multicopter, a quadcopter, a balloon, and objects mounted thereon.
- the moving body may also be a moving body that travels autonomously based on an operation command.
- At least one of the base station and the mobile station may also include devices that do not necessarily move during communication operations.
- at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.
- IoT Internet of Things
- the base station in the present disclosure may be read as a terminal.
- each aspect/embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)).
- the terminal 20 may be configured to have the functions of the base station 10 described above.
- terms such as "uplink” and "downlink” may be read as terms corresponding to communication between terminals (for example, "side”).
- the uplink channel, downlink channel, etc. may be read as a side channel.
- the terminal in this disclosure may be interpreted as a base station.
- the base station may be configured to have the functions of the terminal described above.
- determining may encompass a wide variety of actions.
- Determining and “determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, search, inquiry (e.g., searching in a table, database, or other data structure), and considering ascertaining as “judging” or “determining.”
- determining and “determining” may include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and considering ascertaining as “judging” or “determining.”
- judgment” and “decision” can include considering resolving, selecting, choosing, establishing, comparing, etc., to have been “judged” or “decided.” In other words, “judgment” and “decision” can include considering some action to have been “judged” or “decided.” Additionally, “judgment (decision)” can be interpreted as “assuming,” “ex
- connection refers to any direct or indirect connection or coupling between two or more elements, and may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between elements may be physical, logical, or a combination thereof.
- “connected” may be read as "access.”
- two elements may be considered to be “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.
- the reference signal may also be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.
- the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to an element using a designation such as "first,” “second,” etc., used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, a reference to a first and a second element does not imply that only two elements may be employed or that the first element must precede the second element in some way.
- a radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further be composed of one or more slots in the time domain. A subframe may have a fixed time length (e.g., 1 ms) that is independent of numerology.
- Numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel. Numerology may indicate, for example, at least one of the following: subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, a specific filtering process performed by the transceiver in the frequency domain, a specific windowing process performed by the transceiver in the time domain, etc.
- SCS subcarrier spacing
- TTI transmission time interval
- radio frame structure a specific filtering process performed by the transceiver in the frequency domain
- a specific windowing process performed by the transceiver in the time domain etc.
- a slot may consist of one or more symbols in the time domain (such as OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.).
- a slot may be a time unit based on numerology.
- a slot may include multiple minislots. Each minislot may consist of one or multiple symbols in the time domain. A minislot may also be called a subslot. A minislot may consist of fewer symbols than a slot.
- a PDSCH (or PUSCH) transmitted in a time unit larger than a minislot may be called PDSCH (or PUSCH) mapping type A.
- a PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.
- Radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals. Radio frame, subframe, slot, minislot, and symbol may each be referred to by a different name that corresponds to the radio frame, subframe, slot, minislot, and symbol.
- one subframe may be called a transmission time interval (TTI)
- TTI transmission time interval
- multiple consecutive subframes may be called a TTI
- one slot or one minislot may be called a TTI.
- at least one of the subframe and the TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (e.g., 1-13 symbols), or a period longer than 1 ms.
- the unit representing the TTI may be called a slot, minislot, etc., instead of a subframe.
- one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.
- TTI refers to, for example, the smallest time unit for scheduling in wireless communication.
- a base station performs scheduling to allocate wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units.
- wireless resources such as frequency bandwidth and transmission power that can be used by each terminal 20
- TTI is not limited to this.
- the TTI may be a transmission time unit for a channel-coded data packet (transport block), a code block, a code word, etc., or may be a processing unit for scheduling, link adaptation, etc.
- the time interval e.g., the number of symbols
- the time interval in which a transport block, a code block, a code word, etc. is actually mapped may be shorter than the TTI.
- one or more TTIs may be the minimum time unit of scheduling.
- the number of slots (minislots) that constitute the minimum time unit of scheduling may be controlled.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, etc.
- TTI shorter than a normal TTI may be called a shortened TTI, short TTI, partial or fractional TTI, shortened subframe, short subframe, minislot, subslot, slot, etc.
- a long TTI (e.g., a normal TTI, a subframe, etc.) may be interpreted as a TTI having a time length of more than 1 ms
- a short TTI e.g., a shortened TTI, etc.
- TTI length shorter than the TTI length of a long TTI and equal to or greater than 1 ms.
- a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers in the frequency domain.
- the number of subcarriers included in an RB may be the same regardless of the numerology, and may be, for example, 12.
- the number of subcarriers included in an RB may be determined based on the numerology.
- the time domain of an RB may include one or more symbols and may be one slot, one minislot, one subframe, or one TTI in length.
- One TTI, one subframe, etc. may each be composed of one or more resource blocks.
- one or more RBs may be referred to as a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, etc.
- PRB physical resource block
- SCG sub-carrier group
- REG resource element group
- PRB pair an RB pair, etc.
- a resource block may be composed of one or more resource elements (REs).
- REs resource elements
- one RE may be a radio resource area of one subcarrier and one symbol.
- a Bandwidth Part which may also be referred to as a partial bandwidth, may represent a subset of contiguous common resource blocks (RBs) for a given numerology on a given carrier, where the common RBs may be identified by an index of the RB relative to a common reference point of the carrier.
- PRBs may be defined in a BWP and numbered within the BWP.
- the BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP).
- UL BWP UL BWP
- DL BWP DL BWP
- One or more BWPs may be configured for a UE within one carrier.
- At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
- BWP bitmap
- radio frames, subframes, slots, minislots, and symbols are merely examples.
- the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in an RB, as well as the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.
- a and B are different may mean “A and B are different from each other.”
- the term may also mean “A and B are each different from C.”
- Terms such as “separate” and “combined” may also be interpreted in the same way as “different.”
- notification of specific information is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).
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Abstract
Description
接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する制御部と
を備える端末が提供される。
図1は、通信システムの例を説明するための図である。図1に示されるように、通信システムは、端末20であるUE、及び、複数のネットワークノード装置から構成される。以下、機能ごとに1つのネットワークノード装置が対応するものとするが、複数の機能を1つのネットワークノード装置が実現してもよいし、複数のネットワークノード装置が1つの機能を実現してもよい。また、以下に記載する「接続」は、論理的な接続であってもよいし、物理的な接続であってもよい。
あるホームオペレータのネットワーク(HPLMN:Home Public Land Mobile Networks)に加入している端末20がローミングした先で在圏するオペレータのネットワークはVPLMN(Visited PLMN)と呼ばれる。
・S-NSSAI
・上記S-NSSAIのスライスをサポートするVPLMNの一覧
端末20に通知される情報の例を図4(C1-230543からの抜粋)に示す。図4において、例えば、S-NSSAI=1のスライスの利用に関しては、VPLMN 1、VPLMN 3、VPLMN 4の順で優先度が決められていることが示されている(VPLMN1の優先度が最も高い)。
-VPLMN 2: 0.5*x + 0.3*2 + 0.2*1 = 0.8 + 0.5x weighted priority;
-VPLMN 3: 0.5*2 + 0.3*3 + 0.2*2 = 2.1 weighted priority; and
-VPLMN 4: 0.5*3 + 0.3*x + 0.2*x = 1.5 + 0.5x weighted priority;
例えば、VPLMN 1に関して、S-NSSAI=1のスライスの優先度は最も高く(優先度=1)、重みは0.5なので、S-NSSAI=1についてのスコアは0.5*1となる。上記のxは、該当VPLMNにおいてそのスライスがサポートされていないことを示し、xとして例えば10が設定される。上記の計算例において、端末20が最も優先度の高いVPLMNを選択するものとすると、端末20は、VPLMN 1を選択する。
上述したような従来の提案に係る方式では、端末20が利用したいスライスをベースとしたVPLMNの重み付けが採用されている。しかし、この方式では、例えば、端末20で使用される重要なアプリケーションが、あるスライスAを使いたい場合と、重要ではないアプリケーションがスライスAを使いたい場合とを区分なく、同一扱いしている。
第1実施形態では、図5のS101に示すとおり、NW(具体的にはネットワークノード装置30)から端末20に対して、どのようなアプリケーションに対してSlice based SoRを適用すべきかを示す情報を通知する。図5では、当該情報をSlice based SoR関連情報と呼んでいる。ネットワークノード装置30は、端末20のHPLMNのネットワークノード装置30であってもよいし、ローミング先のVPLMNのネットワークノード装置30であってもよい。
図7のフローチャートを参照して、第1実施形態において端末20が実行する処理のフローを説明する。フローの前提として、端末20は、フラグ付きのURSP rulesを既に保持しているものとする。また、端末20は、VPLMNごとのサポートするスライスの情報(スライスサポート情報と呼ぶ)を保持しているものとする。
上述したルール(例:図6)では、フラグとして、1つ1つのURSP ruleに紐づいたTRUE/FALSEの2値の情報を使用しているが、これに限定されるわけではない。1つ1つのURSP ruleに紐づいたフラグとして、例えば、数値(例えば、0以上1以下の実数)を使用してもよい。この数値が、それに紐づくURSP ruleの優先度あるいは重要度を示す重み(weight value)であってもよい。
フラグ付けされたURSP rules(新規URSP rulesと呼ぶ)の通知方法については、特定の方法に限定されない。図5に示したように、任意のネットワークノード装置30から端末20に対して新規URSP rulesが通知されればよい。また、新規URSP rulesは、端末20がHPLMNに在圏している時に端末20に通知されてもよいし、端末20がVPLMNに在圏している時に通知されてもよい。具体的な例を以下で説明する。
第2実施形態の背景は、第1実施形態の背景と同じであり、図3、図4を参照して既に説明したとおりである。
第1実施形態の背景で説明した従来の提案に係る方式では、端末20において接続したいスライスが変わった際、端末20が新しいオペレータのネットワークへ遷移する可能性がある。しかし、本遷移によって、既存の通信中のサービスが切断されてしまうという課題がある。
第2実施形態においても、第1実施形態と同様に、図5のS101に示すとおり、NW(具体的にはネットワークノード装置30)から端末20に対して、Slice based SoR関連情報の通知がなされる。
図11のフローチャートを参照して、第2実施形態において、端末20が実行する処理のフローを説明する。フローの前提として、端末20は、「Slice based SoR」がクライテリアとして設定されたSoR-CMCIを既に保持しているものとする。また、端末20は、VPLMNごとのサポートするスライスの情報(スライスサポート情報と呼ぶ)を保持しているものとする。
上述したSoR-CMCI(例:図10)により、Slice-based SoRを実行するタイミングを制御できる。ただし、上述したSoR-CMCI(例:図10)では、サービスごと(あるいはアプリケーションごと)にきめ細かなSlice basedのSoRを実施するタイミングの制御ができない。
第2実施形態におけるSoR-CMCI(新規SoR-CMCIと呼ぶ)の通知方法については、特定の方法に限定されない。図5に示したように、任意のネットワークノード装置30から端末20に対して新規SoR-CMCIが通知されればよい。また、新規SoR-CMCIは、端末20がHPLMNに在圏している時に端末20に通知されてもよいし、端末20がVPLMNに在圏している時に通知されてもよい。具体的な例を以下で説明する。
次に、これまでに説明した処理及び動作を実施するネットワークノード装置30と端末20の機能構成例を説明する。
図14は、ネットワークノード装置30の機能構成の一例を示す図である。ネットワークノード装置30は、RAN(基地局10)、AMF、SMF、UPF、UDMのうちのいずれのネットワークノード装置であってもよいし、これら以外のネットワークノード装置であってもよい。
図15は、端末20の機能構成の一例を示す図である。図15に示されるように、端末20は、送信部210と、受信部220と、設定部230と、制御部240とを有する。図15に示される機能構成は一例に過ぎない。本発明の実施の形態に係る動作を実行できるのであれば、機能区分及び機能部の名称はどのようなものでもよい。送信部210と、受信部220をまとめて通信部と称してもよい。
(付記項1)
アプリケーションごとに、使用するべきスライスを示すルール情報と、遷移動作に関するフラグ情報とをネットワークから受信する受信部と、
前記ルール情報に基づいて、接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記フラグ情報に基づいて、前記遷移先ネットワークへの遷移を実行するか否かを判断する制御部と
を備える端末。
(付記項2)
前記フラグ情報は、前記遷移動作を実行するか否かを示す2値の情報である
付記項1に記載の端末。
(付記項3)
前記フラグ情報は、前記ルール情報におけるスライスの重みを示す実数値である
付記項1に記載の端末。
(付記項4)
アプリケーションごとに、使用するべきスライスを示すルール情報と、遷移動作に関するフラグ情報とを生成する制御部と、
前記ルール情報と前記フラグ情報とを端末に送信する送信部と、を備え、
前記端末は、前記ルール情報に基づいて、接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記フラグ情報に基づいて、前記遷移先ネットワークへの遷移を実行するか否かを判断する
ネットワークノード装置。
(付記項5)
アプリケーションごとに、使用するべきスライスを示すルール情報と、遷移動作に関するフラグ情報とをネットワークから受信し、
前記ルール情報に基づいて、接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記フラグ情報に基づいて、前記遷移先ネットワークへの遷移を実行するか否かを判断する
端末が実行する通信方法。
(付記項1)
基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報をネットワークから受信する受信部と、
接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する制御部と
を備える端末。
(付記項2)
前記タイミングに関する情報は、タイマ値であり、前記制御部は、遷移動作を示す基準情報に対応するタイマ値のタイマが満了したタイミングで、前記遷移先ネットワークへの遷移を実行する
付記項1に記載の端末。
(付記項3)
前記指示情報は、基準情報ごとに、遷移動作を実行するべきタイミングに関する情報と、スライスに基づく遷移動作を適用するか否かを示すフラグとを有し、
前記制御部は、実行中のサービスを示す前記基準情報に対応する前記フラグに基づいて、前記遷移先ネットワークへの遷移を実行するか否かを判断する
付記項1に記載の端末。
(付記項4)
基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報を生成する制御部と、
前記指示情報を端末に送信する送信部と、を備え、
前記端末は、接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する
ネットワークノード装置。
(付記項5)
基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報をネットワークから受信し、
接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する
端末が実行する通信方法。
上記実施形態の説明に用いたブロック図(図14~図15)は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及びソフトウェアの少なくとも一方の任意の組み合わせによって実現される。また、各機能ブロックの実現方法は特に限定されない。すなわち、各機能ブロックは、物理的又は論理的に結合した1つの装置を用いて実現されてもよいし、物理的又は論理的に分離した2つ以上の装置を直接的又は間接的に(例えば、有線、無線などを用いて)接続し、これら複数の装置を用いて実現されてもよい。機能ブロックは、上記1つの装置又は上記複数の装置にソフトウェアを組み合わせて実現されてもよい。
以上、本発明の実施の形態を説明してきたが、開示される発明はそのような実施形態に限定されず、当業者は様々な変形例、修正例、代替例、置換例等を理解するであろう。発明の理解を促すため具体的な数値例を用いて説明がなされたが、特に断りのない限り、それらの数値は単なる一例に過ぎず適切な如何なる値が使用されてもよい。上記の説明における項目の区分けは本発明に本質的ではなく、2以上の項目に記載された事項が必要に応じて組み合わせて使用されてよいし、ある項目に記載された事項が、別の項目に記載された事項に(矛盾しない限り)適用されてよい。機能ブロック図における機能部又は処理部の境界は必ずしも物理的な部品の境界に対応するとは限らない。複数の機能部の動作が物理的には1つの部品で行われてもよいし、あるいは1つの機能部の動作が物理的には複数の部品により行われてもよい。実施の形態で述べた処理手順については、矛盾の無い限り処理の順序を入れ替えてもよい。処理説明の便宜上、ネットワークノード装置30及び端末20は機能的なブロック図を用いて説明されたが、そのような装置はハードウェアで、ソフトウェアで又はそれらの組み合わせで実現されてもよい。本発明の実施の形態に従って基地局10が有するプロセッサにより動作するソフトウェア及び本発明の実施の形態に従って端末20が有するプロセッサにより動作するソフトウェアはそれぞれ、ランダムアクセスメモリ(RAM)、フラッシュメモリ、読み取り専用メモリ(ROM)、EPROM、EEPROM、レジスタ、ハードディスク(HDD)、リムーバブルディスク、CD-ROM、データベース、サーバその他の適切な如何なる記憶媒体に保存されてもよい。
30 ネットワークノード装置
110 送信部
120 受信部
130 設定部
140 制御部
210 送信部
220 受信部
230 設定部
240 制御部
1001 プロセッサ
1002 記憶装置
1003 補助記憶装置
1004 通信装置
1005 入力装置
1006 出力装置
2001 車両
2002 駆動部
2003 操舵部
2004 アクセルペダル
2005 ブレーキペダル
2006 シフトレバー
2007 前輪
2008 後輪
2009 車軸
2010 電子制御部
2012 情報サービス部
2013 通信モジュール
2021 電流センサ
2022 回転数センサ
2023 空気圧センサ
2024 車速センサ
2025 加速度センサ
2026 ブレーキペダルセンサ
2027 シフトレバーセンサ
2028 物体検出センサ
2029 アクセルペダルセンサ
2030 運転支援システム部
2031 マイクロプロセッサ
2032 メモリ(ROM,RAM)
2033 通信ポート(IOポート)
Claims (5)
- 基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報をネットワークから受信する受信部と、
接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する制御部と
を備える端末。 - 前記タイミングに関する情報は、タイマ値であり、前記制御部は、遷移動作を示す基準情報に対応するタイマ値のタイマが満了したタイミングで、前記遷移先ネットワークへの遷移を実行する
請求項1に記載の端末。 - 前記指示情報は、基準情報ごとに、遷移動作を実行するべきタイミングに関する情報と、スライスに基づく遷移動作を適用するか否かを示すフラグとを有し、
前記制御部は、実行中のサービスを示す前記基準情報に対応する前記フラグに基づいて、前記遷移先ネットワークへの遷移を実行するか否かを判断する
請求項1に記載の端末。 - 基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報を生成する制御部と、
前記指示情報を端末に送信する送信部と、を備え、
前記端末は、接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する
ネットワークノード装置。 - 基準情報ごとに、遷移動作を実行するべきタイミングに関する情報を有する指示情報をネットワークから受信し、
接続中のネットワーク以外の遷移先ネットワークにおける特定のスライスへの接続が必要であると判断した場合に、前記指示情報に基づくタイミングで、前記遷移先ネットワークへの遷移を実行する
端末が実行する通信方法。
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| Title |
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| HYUNJUNG CHOE, LG ELECTRONICS: "Support for slice-based SoR feature", 3GPP DRAFT; C1-230681; TYPE CR; CR 1056; ENS_PH3, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. CT WG1, no. Athens, GR; 20230227 - 20230303, 20 February 2023 (2023-02-20), FR, XP052238992 * |
| KUNDAN TIWARI, NEC: "KI#2 Sol#18: Updates to Solution 18", 3GPP DRAFT; S2-2206680; TYPE PCR; FS_ENS_PH3, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), vol. SA WG2, no. Online; 20220817 - 20220826, 10 August 2022 (2022-08-10), FR, XP052185075 * |
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