JP2020057859A - Network node - Google Patents

Abstract

To update the connection priority for each user device to a network slice.SOLUTION: A network node 10 includes a receiving unit that receives a slice connection priority switching request from a user device, a control unit that associates a network slice, a slice connection priority, with a quality of service (QoS) parameter and holds the slices and the slice connection priority as a terminal management slice for each user device, updates the slice connection priority held as the terminal management slice on the basis of the slice connection priority switching request, and a transmission unit that transmits a switching request to a QoS parameter associated with a network slice having the updated high slice connection priority to another network node.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a network node in a wireless communication system.

  In 3GPP (3rd Generation Partnership Project), 5G or NR (New Radio) has been adopted in order to further increase the system capacity, further increase the data transmission speed, and further reduce the delay in the radio section. The study of a so-called wireless communication system (hereinafter, the wireless communication system is referred to as “5G” or “NR”) is being studied. In 5G, various wireless technologies are being studied in order to satisfy the requirement that the delay in a wireless section be 1 ms or less while realizing a throughput of 10 Gbps or more.

  In NR, 5G (5G Core Network) corresponding to EPC (Evolved Packet Core) which is a core network in LTE (Long Term Evolution) network architecture and E-UTRAN (Radio Access Network) in RAN (Ladio Access Network) in LTE network architecture. A network architecture including an NG-RAN (Next Generation-Radio Access Network) corresponding to the Evolved Universal Terrestrial Radio Access Network (NPL 1) has been studied.

3GPP TS 23.501 V15.2.0 (2018-06)

  In the NR, when there are a plurality of network slices that provide a service, the position information of the user apparatus, the status of a desired service, and the like change, so that which network slice among the network slices that provide the service is determined. The priorities used for must be updated dynamically.

  The present invention has been made in view of the above points, and has as its object to update the connection priority of each user device to a network slice.

  According to the disclosed technique, a terminal unit receives a slice connection priority switching request from a user device, and associates a network slice, a slice connection priority, and a QoS (Quality of Service) parameter with a terminal management slice for each user device. And a control unit that updates the slice connection priority held in the terminal management slice based on the slice connection priority switching request, and the updated slice connection priority is associated with a higher network slice. A transmission unit for transmitting the switching request to the QoS parameter to another network node.

  According to the disclosed technology, it is possible to update the connection priority of each user device to a network slice.

FIG. 1 is a diagram for describing a wireless communication network according to an embodiment of the present invention. FIG. 5 is a diagram for describing a priority at which a network slice is selected in the embodiment of the present invention. FIG. 5 is a sequence diagram for describing control of a priority at which a network slice is selected according to the embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a functional configuration of a network node 10 according to the embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a functional configuration of a user device 20 according to the embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a hardware configuration of a network node 10 or a user device 20 according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

  In the operation of the wireless communication system according to the embodiment of the present invention, existing technology is appropriately used. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. Further, the term “LTE” used in the present specification has a broad meaning including LTE-Advanced, and systems after LTE-Advanced (eg, NR), or wireless LAN (Local Area Network), unless otherwise specified. Shall have.

  In the embodiment of the present invention, the term “configure” of the wireless parameter or the like may mean that a predetermined value is set in advance (Pre-configure), or the network node 10 or The wireless parameter notified from the user device 20 may be set.

  FIG. 1 is a diagram illustrating a wireless communication network according to an embodiment of the present invention. As shown in FIG. 1, the network includes a UE that is a user apparatus 20 and a plurality of network nodes 10. Hereinafter, one network node 10 corresponds to each function, but a plurality of functions may be realized by one network node 10 or a plurality of network nodes 10 may realize one function. . Further, the “connection” described below may be a logical connection or a physical connection.

  A RAN (Radio Access Network) is a network node 10 having a radio access function, and is connected to a UE, an AMF (Access and Mobility Management Function), and a UPF (User plane function). The AMF is a network node 10 having functions such as an end of a RAN interface, an end of a NAS (Non-Access Stratum), registration management, connection management, reachability management, and mobility management. The UPF is a network node 10 having functions such as a PDU (Protocol Data Unit) session point to the outside interconnected with a DN (Data Network), packet routing and forwarding, and user plane QoS (Quality of Service) handling. The UPF and the DN constitute a network slice. In the wireless communication network according to the embodiment of the present invention, a plurality of network slices are constructed.

  AMF is UE, RAN, SMF (Session Management Function), NSSF (Network Slice Selection Function), NEF (Network Exposure Function), NRF (Network Repository Function), AUSF (Authentication Server Function), PCF (Policy Control Function), Connected to AF (Application Function). AMF, SMF, NSSF, NEF, NRF, AUSF, PCF, and AF are network nodes 10 interconnected via interfaces based on respective services, Namf, Nsmf, Nnssf, Nnef, Nnrf, Nausf, Npcf, and Naf. It is.

  The SMF is a network node 10 having functions such as session management, UE Internet Protocol (IP) address assignment and management, Dynamic Host Configuration Protocol (DHCP) function, Address Resolution Protocol (ARP) proxy, and roaming function. The NEF is a network node 10 having a function of notifying other NFs (Network Functions) of capabilities and events. The NSSF is a network node 10 having functions such as selection of a network slice to which the UE connects, determination of an allowed NSSAI (Network Slice Selection Assistance Information), determination of an NSSAI to be set, and determination of an AMF set to which the UE connects. is there. The PCF is a network node 10 having a function of performing network policy control. The AF is a network node 10 having a function of controlling an application server.

  When the user device 20 connects to a plurality of network slices, it is necessary to flexibly update the connection priority based on the operation, position information, user information, and the like of the user device. In the operation of the network slice, it is assumed that one user device 20 uses services having different characteristics. When a network slice is created for each service, control of one user device 20 needs to be executed by a plurality of networks. Therefore, it is appropriate that the function of managing the movement of the user device 20 or the function of executing the authentication is performed for each user device 20.

  When the user device 20 intends to receive service provision from the network slice, the user device 20 requests connection to the network slice after designating the type of service. However, if the user device 20 is in an environment where the requested service cannot be sufficiently provided, the connection to the network slice is rejected, and the user device 20 cannot receive the service. Therefore, a terminal management slice is defined, and a slice connection priority list in which a plurality of network slices as connection destination candidates of the user device 20 are arranged in order of priority is created. When requesting a plurality of services from the network, the user device 20 may reliably connect to a network slice having a high priority.

  Here, the priority in the network slice connection candidate list included in the terminal management slice held for each user is set by the network operator. On the other hand, when the user device 20 intends to receive service provision from a plurality of network slices, the priority of a desired network slice connection candidate is dynamically determined according to the position, operation, time, and the like of the user device 20 at that time. Is assumed to change. For example, since the service for which connection is surely desired may change according to the status of the user device 20, the priority in the network slice connection candidate list stored in the terminal management slice continues to be dynamically updated. There is a need. In the conventional method, the slice connection priority stored in the terminal management slice is updated collectively, so that it cannot be switched immediately.

  Accordingly, the terminal information slice is notified of the position information, operation, time, and user information of the user device 20 that changes every moment, and the priority of the network slice connection candidate list stored for each user is updated.

  FIG. 2 is a diagram for describing the priority at which a network slice is selected according to the embodiment of the present invention. In the terminal management slice, an item of the slice connection priority from the user's viewpoint is created and added to the stored slice connection candidate list. For the item of the slice connection priority to be created, a supposed terminal environment is prepared. When the environment is updated, the terminal notifies the terminal management slice and immediately switches the slice connection priority. Table 1 is an example of the slice connection priority stored in the terminal management slice.

  As shown in Table 1, the slice connection priority is set to “at the time of moving” and “at the time of stationary” in the user environment. The slide connection priority is not limited to “at the time of movement” and “at the time of stationary”, and may be set in other user environments. For example, when the slice connection priority at the time of moving the URLLC slice is X1, the slice connection priority of the Best Effort slice is Y2, and the slice connection priority of the IoT slice is Z3, the slice connection priority is Z3> Y2> X1. They may be set in order. For example, when the slice connection priority at the time of moving the URLLC slice is Xa, the slice connection priority of the Best Effort slice is Yb, and the slice connection priority of the IoT slice is Zc, the slice connection priority is Xa> Yb> Zc may be set in this order.

  Further, as shown in Table 1, "connection priority (operator)", "maximum transmission rate", and "guaranteed bandwidth" are set for each network slice. “Connection priority (operator)” is the priority of each network slice when accommodating a terminal from the viewpoint of the operator. "Maximum transmission rate" and "guaranteed bandwidth" are examples of QoS parameters associated with a network slice. When the slice connection priority is changed, the QoS parameter applied according to the slice connection priority is also changed.

  Also, as shown in FIG. 2, in order to reliably provide a service desired by the user according to the environment of the user device 20, the terminal management slice is determined according to whether the user device 20 is moving or stationary. , The priority of the slice connection candidate list stored in the list is updated, and the QoS parameter is updated. For example, when the network slices are of three types: large capacity type, Best Effort type, and IoT type, when the terminal moves, the network increases the priority of the IoT type network slice and lowers the priority of the large capacity type. . When the terminal is stationary, the network increases the priority of the large-capacity type and lowers the priority of the IoT type. In addition, the network changes to the QoS parameters associated with the network slice that has been changed to have a higher priority.

  FIG. 3 is a sequence diagram illustrating control of the priority at which a network slice is selected according to the embodiment of the present invention. UE corresponds to the user apparatus 20, AP corresponds to RAN and AMF, UP (User Plane) Function corresponds to UPF, CP (Control Plane) Function corresponds to SMF and the like.

  In step S1, the PDU session has already been established, and a case occurs in the UE. For example, the case may be the case where the UE has transitioned to the moving state, the case where the UE has transitioned to the stationary state, or another state. Subsequently, in step S2, the UE transmits a slice priority switching request including information indicating a case to the CP Function via the AP.

  In step S3, the CP Function updates the slice priority parameter of the UE held by the terminal management slice based on the slice priority switching request received from the UE. The slice priority parameter is a slice connection priority associated with the network slice described in Table 1. As described in FIG. 2, the priority network slice is changed according to the state of the UE. For example, when the state of the UE included in the slice priority switching request is “when the terminal is moving”, priority 3 is assigned to a large capacity network slice, priority 2 is assigned to a Best Effort type network slice, and priority is assigned to an IoT type network slice. It is changed to 1. Priority 1 has the highest priority and priority 3 has the lowest priority. Also, for example, when the state of the UE included in the slice connection priority switching request is “terminal stationary”, priority 1 is assigned to a large-capacity network slice, priority 2 is assigned to a Best Effort type network slice, and IoT network slice is assigned. Is changed to priority 3.

  In step S4, the CP Function transmits a QoS parameter switching request to the UP Function based on the slice priority parameter of the UE held by the terminal management slice updated in step S3. Subsequently, the UP Function changes the QoS parameter so as to match the slice connection priority parameter of the UE (S5). For example, when the UE is “moving”, the QoS parameter associated with the network slice having the highest moving priority among the slice connection priorities held by the terminal management slice is applied. For example, when the UE is “at rest”, the QoS parameter associated with the network slice having the highest priority at rest at the slice connection priority held by the terminal management slice is applied.

  Subsequently, the UP Function transmits the completion of the QoS parameter switching to the CP Function (S6). Subsequently, the CP Function transmits a slice connection priority update completion to the UE (S7). In step S8, the AF provides the service with the QoS established for each user.

  As the slice connection priority, the slice connection priority stored in the terminal management slice may be updated according to the rate at which a service request is made for each environment where the user is located. For example, the rate at which the CP Function makes a service request for each environment in which the UE is located is calculated, and if the rate falls below or exceeds a predetermined rate, the slice connection priority stored in the terminal management slice is updated. Good. Table 2 is an example of the slice connection priority held in the terminal management slice.

  As shown in Table 2, the slice connection priority is the order of the IoT slice, the Best Effort slice, and the URLLC slice when moving, and the order of the URLLC slice, the Best Effort slice, and the IoT slice when stationary. That is, as the QoS parameter, the QoS parameter associated with the IoT slice when moving and the QoS parameter associated with the URLLC slice when stationary are applied with priority.

  Here, when the frequency of use of the URLLC service is low when the user is stationary, the slice connection priority shown in Table 3 may be updated.

  As shown in Table 3, the slice connection priority does not change when moving, and is updated in the order of Best Effort slice, IoT slice, and URLLC slice when stationary. That is, the QoS parameter associated with the Best Effort slice at the time of stillness is applied with priority.

  According to the above embodiment, the network node can change the priority of the network slice managed for each UE based on the status of the UE reported by the UE. Further, the network node can change the QoS parameter in the network slice to which the UE connects based on the priority of the network slice managed for each UE.

  That is, the connection priority of each user device to the network slice can be updated.

(Device configuration)
Next, an example of a functional configuration of the network node 10 and the user device 20 that execute the processing and operations described above will be described. The network node 10 and the user device 20 include a function for implementing the above-described embodiment. However, each of the network node 10 and the user device 20 may include only some of the functions in the embodiment.

<Network node 10>
FIG. 4 is a diagram illustrating an example of a functional configuration of the network node 10. As shown in FIG. 4, the network node 10 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 4 is only an example. As long as the operation according to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any. Further, the network node 10 having a plurality of different functions on the system architecture may be constituted by a plurality of network nodes 10 separated for each function.

  The transmitting unit 110 includes a function of generating a signal to be transmitted to the user device 20 or another network node 10, and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the user device 20 and acquiring, for example, information of a higher layer from the received signals. In addition, the transmission unit 110 has a function of transmitting an NR-PSS, an NR-SSS, an NR-PBCH, a DL / UL control signal, a DL reference signal, and the like to the user device 20.

  The setting unit 130 stores preset setting information and various kinds of setting information to be transmitted to the user device 20 in a storage device, and reads out from the storage device as needed. The content of the setting information is, for example, information related to QoS parameter management of the session, information related to the priority of the network slice, and the like.

  The control unit 140 performs the process related to the QoS control of the PDU session between the user device 20 and the user plane as described in the embodiment. Further, the control unit 140 performs a process related to control of the network slice connection priority of the user device 20. A function unit related to signal transmission in control unit 140 may be included in transmitting unit 110, and a function unit related to signal reception in control unit 140 may be included in receiving unit 120.

<User device 20>
FIG. 5 is a diagram illustrating an example of a functional configuration of the user device 20. As shown in FIG. 5, the user device 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 5 is only an example. As long as the operation according to the embodiment of the present invention can be executed, the names of the functional divisions and the functional units may be any.

  Transmitting section 210 generates a transmission signal from the transmission data, and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains a higher-layer signal from the received physical-layer signal. Further, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, a DL / UL / SL control signal or a reference signal transmitted from the network node 10. In addition, for example, the transmission unit 210 transmits the physical sidelink control channel (PSCCH), the physical sidelink shared channel (PSSCH), the physical sidelink discovery channel (PSDCH), and the physical sidelink broadcast channel (PSBCH) to another user device 20 as D2D communication. ) And the like, and the receiving unit 220 receives a PSCCH, a PSSCH, a PSDCH, a PSBCH, or the like from another user apparatus 20. Further, the transmission unit 210 and the reception unit 220 have a transmission / reception function of a wireless LAN or a wired LAN.

  The setting unit 230 stores various setting information received from the network node 10 or the user device 20 by the receiving unit 220 in a storage device, and reads out the setting information from the storage device as needed. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, information related to QoS parameter management of the session, information related to the priority of the network slice, and the like.

  The control unit 240 performs the process related to the QoS control of the PDU session between the user device 20 and the user plane as described in the embodiment. In addition, the control unit 240 performs a process related to control of the network slice connection priority of the user device 20. A function unit related to signal transmission in control unit 240 may be included in transmission unit 210, and a function unit related to signal reception in control unit 240 may be included in reception unit 220.

(Hardware configuration)
The block diagrams (FIGS. 4 and 5) used in the description of the above embodiment show blocks in functional units. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. In addition, a method of implementing each functional block is not particularly limited. That is, each functional block may be realized using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated from each other). , Wired, wireless, etc.), and may be implemented using these multiple devices. The functional block may be realized by combining one device or the plurality of devices with software.

  Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deemed, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, but not limited to these I can't. For example, a functional block (configuration unit) that causes transmission to function is called a transmitting unit (transmitting unit) or a transmitter (transmitter). In any case, as described above, the realization method is not particularly limited.

  For example, the network node 10, the user device 20, and the like according to an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method according to the present disclosure. FIG. 6 is a diagram illustrating an example of a hardware configuration of the network node 10 and the user device 20 according to an embodiment of the present disclosure. The above-described network node 10 and user device 20 are physically configured as computer devices including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. You may.

  In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the network node 10 and the user device 20 may be configured to include one or more devices illustrated in the drawing, or may be configured not to include some devices.

  The functions of the network node 10 and the user device 20 are controlled by reading predetermined software (program) on hardware such as the processor 1001 and the storage device 1002 so that the processor 1001 performs an operation and controls communication by the communication device 1004. And controlling at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

  The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the control unit 140, the control unit 240, and the like described above may be realized by the processor 1001.

  In addition, the processor 1001 reads a program (program code), a software module, data, or the like 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 these. As the program, a program that causes a computer to execute at least a part of the operation described in the above embodiment is used. For example, the control unit 140 of the network node 10 illustrated in FIG. 4 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Further, for example, the control unit 240 of the user device 20 illustrated in FIG. 5 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, the processes may be executed simultaneously or sequentially by two or more processors 1001. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

  The storage device 1002 is a computer-readable recording medium, and includes at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be configured. The storage device 1002 may be called a register, a cache, a main memory (main storage device), or the like. The storage device 1002 can store a program (program code), a software module, and the like that can be executed to execute the communication method according to an embodiment of the present disclosure.

  The auxiliary storage device 1003 is a computer-readable recording medium, for example, an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, Blu -Ray (registered trademark) disk), a smart card, a flash memory (eg, card, stick, key drive), a floppy (registered trademark) disk, a magnetic strip, or the like. The auxiliary storage device 1003 may be called an auxiliary storage device. The storage medium described above may be, for example, a database including at least one of the storage device 1002 and the auxiliary storage device 1003, a server, or another appropriate medium.

  The communication device 1004 is hardware (transmission / reception device) for performing communication 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, or the like. The communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like, for example, in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). May be configured. For example, a transmitting / receiving antenna, an amplifier unit, a transmitting / receiving unit, a transmission line interface, and the like may be realized by the communication device 1004. The transmission / reception unit may be physically or logically separated from the transmission unit and the reception unit.

  The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an external input. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, and the like) that performs output to the outside. Note that the input device 1005 and the output device 1006 may have an integrated configuration (for example, 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 a different bus for each device.

  In addition, the network node 10 and the user device 20 include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). It may be configured to include hardware, and some or all of the functional blocks may be realized by the hardware. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

(Summary of Embodiment)
As described above, according to the embodiment of the present invention, a receiving unit that receives a slice connection priority switching request from a user apparatus, a network slice, a slice connection priority, and a QoS (Quality of Service) parameter A control unit that holds as a terminal management slice for each user device in association with each other, and updates a slice connection priority held in the terminal management slice based on the slice connection priority switching request; and the updated slice. A transmission unit configured to transmit a switching request to a QoS parameter associated with a network slice having a high connection priority to another network node.

  According to the above configuration, the network node can change the priority of the network slice managed for each UE based on the UE status reported by the UE. Further, the network node can change the QoS parameter in the network slice to which the UE connects based on the priority of the network slice managed for each UE. That is, the connection priority of each user device to the network slice can be updated.

  The slice connection priority may be held for each piece of information indicating the environment of the user device. With this configuration, the network node can change the priority of the network slice managed for each UE environment.

  The slice connection priority switching request may include information indicating an environment of the user device. With this configuration, the network node can change the priority of the network slice managed for each UE based on the state of the UE reported by the UE.

  The information indicating the environment of the user device may be information indicating that the user device is moving or stationary. With this configuration, the network node can change the priority of the network slice managed for each UE based on the state of the UE reported by the UE.

  The control unit may calculate a rate at which a service request is made for each environment of the user apparatus, and update a slice connection priority held in the terminal management slice based on a result of the calculation. With this configuration, the network node can change the priority of the network slice managed for each UE based on the execution state of the service request of the UE.

(Supplement to the embodiment)
Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art can understand various modifications, modification examples, alternative examples, substitution examples, and the like. There will be. Although the description has been made using specific numerical examples to facilitate the understanding of the invention, unless otherwise specified, those numerical values are merely examples, and any appropriate values may be used. The division of the items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as needed, or the items described in one item may be replaced by another item. (Unless inconsistent). The boundaries between functional units or processing units in the functional block diagrams do not always correspond to the boundaries between physical components. The operation of a plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by a plurality of components. In the processing procedure described in the embodiment, the order of the processing may be changed as long as there is no contradiction. Although the network node 10 and the user device 20 have been described using a functional block diagram for convenience of description of the process, such a device may be realized by hardware, software, or a combination thereof. The software operated by the processor of the network node 10 according to the embodiment of the present invention and the software operated by the processor of the user device 20 according to the embodiment of the present invention are a random access memory (RAM), a flash memory, and a read-only, respectively. The data may be stored in a memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

  In addition, notification of information is not limited to the aspect / embodiment described in the present disclosure, and may be performed using another method. For example, information notification includes physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (eg, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, RRC signaling may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof, and RRC signaling may be called an RRC message. It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.

  Each aspect / embodiment described in the present disclosure is applicable to LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark) )), Systems utilizing IEEE 802.16 (WiMAX®), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and extensions based thereon. It may be applied to at least one of the next generation systems. Further, a plurality of systems may be combined (for example, a combination of at least one of LTE and LTE-A with 5G) and applied.

  The processing procedure, sequence, flowchart, and the like of each aspect / embodiment described in this specification may be permuted as long as there is no inconsistency. For example, for the methods described in this disclosure, elements of various steps are presented in an exemplary order, and are not limited to the specific order presented.

  The specific operation described as being performed by the network node 10 in this specification may be performed by its upper node in some cases. In a network including one or more network nodes having the network node 10, various operations performed for communication with the user device 20 are performed by the network node 10 and other network nodes other than the network node 10. It should be clear that this can be done by at least one (e.g., but not limited to MME or S-GW, etc.). Although the case where the number of the other network nodes other than the network node 10 is one has been illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, the MME and the S-GW). .

  Information or signals described in the present disclosure may be output from an upper layer (or lower layer) to a lower layer (or upper layer). Input and output may be performed via a plurality of network nodes.

  The input and output information and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information that is input and output can be overwritten, updated, or added. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

  The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a Boolean value (Boolean: true or false), or may be compared by numerical values (for example, , Comparison with a predetermined value).

  Software, regardless of whether it is called software, firmware, middleware, microcode, a hardware description language, or any other name, instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

  In addition, software, instructions, information, and the like may be transmitted and received via a transmission medium. For example, if the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), the website, When transmitted from a server or other remote source, at least one of these wired and / or wireless technologies is included within the definition of a transmission medium.

  The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc., that can be referred to throughout the above description are not limited to voltages, currents, electromagnetic waves, magnetic or magnetic particles, optical or photons, or any of these. May be represented by a combination of

  Note that terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning. For example, at least one of the channel and the symbol may be a signal (signaling). Also, the signal may be a message. Further, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, or the like.

  The terms "system" and "network" as used in this disclosure are used interchangeably.

  Further, the information, parameters, and the like described in the present disclosure may be expressed using an absolute value, may be expressed using a relative value from a predetermined value, or may be expressed using another corresponding information. May be represented. For example, the radio resource may be indicated by an index.

  The names used for the parameters described above are not limiting in any way. Further, equations and the like using these parameters may differ from those explicitly disclosed in the present disclosure. Since the various channels (eg, PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements may be limited in any way. is not.

  In the present disclosure, “base station (BS)”, “wireless base station”, “base station device”, “fixed station”, “NodeB”, “eNodeB (eNB)”, “gNodeB” (GNB) "," access point "," transmission point "," reception point "," transmission / reception point "," cell "," sector ", Terms such as "cell group", "carrier", "component carrier" may be used interchangeably. A base station may also be referred to as a macro cell, a small cell, a femto cell, a pico cell, or the like.

  A base station can accommodate one or more (eg, three) cells. If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: The communication service can also be provided by a Remote Radio Head.The term “cell” or “sector” is a part or the whole of a coverage area of at least one of a base station and a base station subsystem that provide communication service in this coverage. Point to.

  In the present disclosure, terms such as “Mobile Station (MS)”, “user terminal”, “User Equipment (UE)”, “terminal” and the like may be used interchangeably. .

  A mobile station can be 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, by one of ordinary skill in the art. It may also be called a terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.

  At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on the mobile unit, the mobile unit itself, or the like. The moving object may be a vehicle (for example, a car, an airplane, or the like), may be an unmanned moving object (for example, a drone, an autonomous vehicle), or may be a robot (maned or unmanned). ). Note that at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

  Further, the base station in the present disclosure may be replaced with a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of user devices 20 (for example, it may be called D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). Each aspect / embodiment of the present disclosure may be applied to the configuration described above. In this case, the user device 20 may have the function of the network node 10 described above. Further, words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”). For example, an uplink channel, a downlink channel, and the like may be replaced with a side channel.

  Similarly, a user terminal in the present disclosure may be replaced with a base station. In this case, the configuration may be such that the base station has the function of the user terminal described above.

  The terms "determining" and "determining" as used in the present disclosure may encompass a wide variety of operations. `` Judgment '', `` decision '', for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigating (investigating), searching (looking up, search, inquiry) (E.g., searching in a table, database, or another data structure), ascertaining may be considered "determined", "determined", and the like. Also, “determining” and “deciding” include receiving (eg, receiving information), transmitting (eg, transmitting information), input (input), output (output), and access. (accessing) (for example, accessing data in a memory) may be regarded as “determined” or “determined”. In addition, `` judgment '' and `` decision '' means that resolving, selecting, selecting, establishing, establishing, comparing, etc. are regarded as `` judgment '' and `` decided ''. May be included. In other words, “judgment” and “decision” may include deeming any operation as “judgment” and “determined”. “Judgment (determination)” may be read as “assuming”, “expecting”, “considering”, or the like.

  The terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or connection between two or more elements that It may include the presence of one or more intermediate elements between the two elements "connected" or "coupled." The coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”. As used in this disclosure, two elements may be implemented using at least one of one or more wires, cables, and printed electrical connections, and as some non-limiting and non-exhaustive examples, in the radio frequency domain. , Can be considered "connected" or "coupled" to each other using electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.

  The reference signal may be abbreviated as RS (Reference Signal), or may be referred to as Pilot according to an applied standard.

  Reference to “based on” as used in the present disclosure does not mean “based solely on” unless otherwise indicated. In other words, the phrase "based on" means both "based only on" and "based at least on."

  Any reference to elements using designations such as "first", "second", etc., as used in the present disclosure, does not generally limit the quantity or order of those elements. These designations may be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to first and second elements do not mean that only two elements can be employed, or that the first element must precede the second element in some way.

  “Means” in the configuration of each device described above may be replaced with “unit”, “circuit”, “device”, or the like.

  Where the terms “include”, “including” and variations thereof are used in the present disclosure, these terms are as inclusive as the term “comprising” Is intended. Further, the term "or" as used in the present disclosure is not intended to be an exclusive or.

  A radio frame may be composed of one or more frames in the time domain. One or more each frame in the time domain may be referred to as a subframe. A subframe may be further configured by one or more slots in the time domain. The subframe may be a fixed time length (eg, 1 ms) that does not depend on numerology.

  Numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. Numerology includes, for example, a subcarrier interval (SCS: SubCarrier Spacing), a bandwidth, a symbol length, a cyclic prefix length, a transmission time interval (TTI), a number of symbols per TTI, a radio frame configuration, and a transceiver. At least one of a specific filtering process performed in a frequency domain and a specific windowing process performed by a transceiver in a time domain may be indicated.

  A slot may be composed of one or more symbols (orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.) in the time domain. A slot may be a time unit based on numerology.

  A slot may include multiple mini-slots. Each minislot may be constituted by one or more symbols in the time domain. Also, the mini-slot may be called a sub-slot. A minislot may be made up of a smaller number of symbols than slots. A PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (or PUSCH) mapping type B.

  Each of the radio frame, subframe, slot, minislot and symbol represents a time unit when transmitting a signal. The radio frame, the subframe, the slot, the minislot, and the symbol may have different names corresponding to each.

  For example, one subframe may be called a transmission time interval (TTI), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot is called a TTI. You may. That is, at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1 to 13 symbols), or a period longer than 1 ms. It may be. Note that the unit representing the TTI may be called a slot, a minislot, or the like instead of a subframe.

  Here, the TTI refers to, for example, a minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used in each user device 20) to each user device 20 in TTI units. Note that the definition of TTI is not limited to this.

  The TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, a code word, or a processing unit such as scheduling and link adaptation. Note that when a TTI is given, a time section (for example, the number of symbols) in which a transport block, a code block, a codeword, and the like are actually mapped may be shorter than the TTI.

  When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum time unit for scheduling. Further, the number of slots (mini-slot number) constituting the minimum time unit of the scheduling may be controlled.

  A TTI having a time length of 1 ms may be referred to as a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, and the like. A TTI shorter than the normal TTI may be called a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

  Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (for example, a shortened TTI, etc.) may be replaced with a TTI shorter than the long TTI and 1 ms. The TTI having the above-described TTI length may be replaced with the TTI.

  A resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain. The number of subcarriers included in the RB may be the same regardless of the numerology, and may be, for example, 12. The number of subcarriers included in the RB may be determined based on numerology.

  Further, the time domain of the RB may include one or a plurality of symbols, and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, and the like may each be configured with one or a plurality of resource blocks.

  One or a plurality of RBs include a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, and the like. May be called.

  Further, the resource block may be configured by one or a plurality of resource elements (RE: Resource Element). For example, one RE may be a radio resource area of one subcarrier and one symbol.

  A bandwidth part (BWP: Bandwidth Part) (which may be referred to as a partial bandwidth or the like) may represent a subset of consecutive common resource blocks (RBs) for a certain numerology in a certain carrier. Here, the common RB may be specified by an index of the RB based on the common reference point of the carrier. A PRB may be defined by a BWP and numbered within the BWP.

  The BWP may include a BWP for UL (UL BWP) and a BWP for DL (DL BWP). For a UE, one or more BWPs may be configured in one carrier.

  At least one of the configured BWPs may be active, and the UE may not have to assume transmitting and receiving a given signal / channel outside the active BWP. Note that “cell”, “carrier”, and the like in the present disclosure may be replaced with “BWP”.

  The structures of the above-described radio frames, subframes, slots, minislots, and symbols are merely examples. For example, 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, included in an RB The configuration of the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.

  In the present disclosure, where articles are added by translation, for example, a, an and the in English, the present disclosure may include that the nouns following these articles are plural.

  In the present disclosure, the term “A and B are different” may mean “A and B are different from each other”. The term may mean that “A and B are different from C”. Terms such as "separate", "coupled" and the like may be interpreted similarly to "different".

  Each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be switched and used with execution. Further, the notification of the predetermined information (for example, the notification of “X”) is not limited to being explicitly performed, and is performed implicitly (for example, not performing the notification of the predetermined information). Is also good.

  While the present disclosure has been described in detail, it will be apparent to one skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modified and changed aspects without departing from the spirit and scope of the present disclosure defined by the description of the claims. Therefore, the description of the present disclosure is intended for illustrative purposes, and has no restrictive meaning to the present disclosure.

Reference Signs List 10 network node 110 transmission unit 120 reception unit 130 setting unit 140 control unit 20 user device 210 transmission unit 220 reception unit 230 setting unit 240 control unit 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device

Claims (5)

A receiving unit that receives a slice connection priority switching request from a user device;
A network slice, a slice connection priority, and a QoS (Quality of Service) parameter are associated with each other and held as a terminal management slice for each user device. Based on the slice connection priority switching request, the slice held in the terminal management slice A control unit for updating the connection priority;
A transmission unit configured to transmit, to another network node, a request for switching to a QoS parameter associated with the updated network slice having a higher slice connection priority.   The network node according to claim 1, wherein the slice connection priority is held for each piece of information indicating an environment of the user device.   The network node according to claim 2, wherein the slice connection priority switching request includes information indicating an environment of the user device.   The network node according to claim 3, wherein the information indicating the environment of the user device is information indicating that the user device is moving or stationary.   The network according to claim 3, wherein the control unit calculates a rate at which a service request is made for each environment of the user device, and updates a slice connection priority held in the terminal management slice based on a result of the calculation. node.

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