Network node and communication method

Abstract

This network node has a transmission unit which transmits scheduling support information to a next generation Node B Distributed Unit (gNB-DU), and a receiving unit which, on the basis of the aforementioned scheduling support information, receives the wireless-side scheduling information generated by the gNB-DU, wherein the transmission unit transmits the scheduling information based on the wireless-side scheduling information to a transport arranged between the gNB-DU and a next generation Node B - Central Unit - User Plane (gNB-CU-UP) on a data transmission path.

Description

[Technical field]

[0001] The present invention relates to a network node and a communication method in a wireless communication system. [Background technology]

[0002] For NR (New Radio) (also known as "5G"), the successor system to LTE (Long Term Evolution), technologies are being considered that satisfy the requirements of a large-capacity system, high-speed data transmission speed, low latency, simultaneous connection of a large number of terminals, low cost, low power consumption, etc. (e.g., Non-Patent Document 1).

[0003] In the existing specifications for NR networks, when the Time-Sensitive Networking (TSN) function is enabled, the Central Network Controller (CNC) transmits scheduling assistance information to the Session Management function (SMF) via the Application Function (TSN-AF) and Policy Control Function (PCF). The SMF transmits the scheduling assistance information to the next generation Node-B (gNB) as Time-Sensitive Communication Assistance Information (TSCAI). The gNB refers to the scheduling assistance information and appropriately determines the scheduling of radio part communications using a configured grant in the case of UL and semi-persistent scheduling in the case of DL. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V16.4.0(2020-12) Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, in an NR network, the scheduling of the transmission paths between gNB-RU (Remote Unit) and gNB-DU (Distributed Unit), the transmission paths between gNB-DU and gNB-CU-UP (Central Unit - User Plane), and the transmission paths between gNB-CU-UP and UPF (User plane function) could not be controlled based on information from the CNC.

[0006] The present invention has been made in view of the above-mentioned points, and has an object to improve the utilization efficiency of user data transmission paths in a wireless communication system. [Means for solving the problem]

[0007] According to the disclosed technology, a network node is provided that has a transmitting unit that transmits scheduling support information to a gNB-DU (next generation Node B Distributed Unit) and a receiving unit that receives radio side scheduling information generated by the gNB-DU based on the scheduling support information, and the transmitting unit transmits the scheduling information based on the radio side scheduling information to a transport installed between the gNB-DU and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) in a data transmission path. Effect of the Invention

[0008] According to the disclosed technique, it is possible to improve the utilization efficiency of user data transmission paths in a wireless communication system. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of a communication system. [Diagram 2] FIG. 1 is a diagram illustrating an example of a network configuration according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a diagram illustrating an example of a transmission path according to an embodiment of the present invention. [Figure 4] A sequence diagram for explaining an example (1) of establishing a PDU session in an embodiment of the present invention. [Diagram 5] A sequence diagram for explaining an example (2) of PDU session establishment in an embodiment of the present invention. [Figure 6] A sequence diagram for explaining an example (3) of PDU session establishment in an embodiment of the present invention. [Figure 7] A sequence diagram for explaining an example (4) of PDU session establishment in an embodiment of the present invention. [Figure 8] A sequence diagram for explaining an example (5) of PDU session establishment in an embodiment of the present invention. [Figure 9] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 10] 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to an embodiment of the present invention. [Figure 11] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0011] In the operation of the wireless communication system according to the embodiment of the present invention, existing technologies are used as appropriate. However, the existing technologies are, for example, existing LTE, but are not limited to existing LTE. In addition, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and systems after LTE-Advanced (e.g., NR) unless otherwise specified.

[0012] In the embodiment of the present invention described below, terms such as SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), and PUSCH (Physical Uplink Shared Channel) used in existing LTE are used. This is for convenience of description, and similar signals, functions, etc. may be called by other names. In addition, the above-mentioned terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, NR-PDCCH, NR-PDSCH, NR-PUCCH, NR-PUSCH, etc. However, even if a signal is used in NR, it is not necessarily specified as "NR-".

[0013] Furthermore, in the embodiment of the present invention, the duplexing method may be a time division duplex (TDD) method, a frequency division duplex (FDD) method, or another method (for example, flexible duplex, etc.).

[0014] Furthermore, in the embodiment of the present invention, when radio parameters, etc. are "configured," this may mean that predetermined values ​​are pre-configured, or that radio parameters notified from base station 10 or terminal 20 are configured.

[0015] Fig. 1 is a diagram for explaining an example of a communication system. As shown in Fig. 1, the communication system is composed of a UE, which is a terminal 20, and a plurality of network nodes 30. In the following, it is assumed that one network node 30 corresponds to each function, but a single network node 30 may realize a plurality of functions, or a single function may be realized by a plurality of network nodes 30. In addition, the "connection" described below may be a logical connection or a physical connection.

[0016] The RAN (Radio Access Network) is a network node 30 having a radio access function, which may include a base station 10, and is connected to the UE, the AMF (Access and Mobility Management Function), and the UPF (User plane function). The AMF is a network node 30 having functions such as a RAN interface termination, a NAS (Non-Access Stratum) termination, registration management, connection management, reachability management, and mobility management. The UPF is a network node 30 having functions such as a PDU (Protocol Data Unit) session point to the outside that interconnects with the 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.

[0017] 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), AUSF (Authentication Server Function), PCF (Policy Control Function), and AF (Application Function). The AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network nodes 30 that are mutually connected via interfaces, Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf, based on their respective services.

[0018] The SMF is a network node 30 having functions such as session management, IP (Internet Protocol) address allocation and management of UE, DHCP (Dynamic Host Configuration Protocol) function, ARP (Address Resolution Protocol) proxy, and roaming function. The NEF is a network node 30 having a function of notifying other NFs (Network Functions) of capabilities and events. The NSSF is a network node 30 having functions such as selecting a network slice to which the UE connects, determining permitted NSSAI (Network Slice Selection Assistance Information), determining an NSSAI to be set, and determining an AMF set to which the UE connects. The PCF is a network node 30 having a function of performing network policy control. The AF is a network node 30 having a function of controlling an application server. The NRF is a network node 30 having a function of discovering an NF instance that provides a service. The UDM is a network node 30 that manages subscriber data and authentication data. The UDM is connected to a UDR (User Data Repository) that holds the data.

[0019] In the existing specifications for NR networks, there is an implicit assumption that a mobile communications operator corresponding to a PLMN (Public Land Mobile Network) that owns a gNB-DU (next generation Node B - Distributed Unit), a gNB-CU-UP (next generation Node B - Central Unit - User Plane) and a UPF (User plane function) owns the user data transmission path between the gNB-DU and gNB-CU-UP and between the gNB-CU-UP and the UPF. In addition, the notification of traffic characteristics to the transmission path is only by the DSCP (Differentiated Services Code Point) value.

[0020] In other words, in the existing specifications for NR networks, there is no concept of a transmission network operator, there is no way for a transmission network operator to accept traffic from multiple PLMNs on a per-call basis, and it is not possible to use transmission paths that obtain traffic characteristics off-path.

[0021] Therefore, each part of the transmission path is configured so that it can be viewed from the outside as one UPF (hereinafter referred to as "transport"). The transport may operate as one network node, or the transport may be further composed of multiple network nodes.

[0022] Fig. 2 is a diagram showing an example of a network configuration in an embodiment of the present invention. As shown in Fig. 2, a gNB-CU-CP (next generation Node B - Central Unit - Control Plane) is capable of setting up a transport between a gNB-DU and a gNB-CU-UP. Also, an SMF is capable of setting up a transport between a gNB-CU-UP and a UPF.

[0023] As shown in Figure 2, the transport consists of three parts: 1)-3) as shown below.

[0024] 1) A part that receives instructions from the gNB-CU-CP or SMF, manages TEIDs (Tunnel Endpoint Identifiers), and deploys traffic characteristics inside the transport. Hereinafter referred to as "tSMF."

[0025] 2) The part located on the edge side as a transmission line. Hereinafter referred to as "aUPF."

[0026] 3) The part located in the center as a transmission path. Hereinafter referred to as "bUPF."

[0027] As shown in Figure 2, the transport can connect a gNB-DU, gNB-CU-UP and UPF in one PLMN with a gNB-DU, gNB-CU-UP and UPF in another PLMN.

[0028] The requesting PLMN can be distinguished by the instruction sent from the gNB-CU-CP or SMF to the transport. In addition, the instruction sent from the gNB-CU-CP to the gNB-CU-UP or the instruction sent from the SMF to the UPF includes an existing network instance. The network instance is a newly encoded name of the transport network operator providing the transport and the type of transport service provided by the transport network operator.

[0029] FIG. 3 is a diagram showing an example of a transmission path in an embodiment of the present invention. In FIG. 3, a transport corresponds to a transmission path between a core U plane and a RANU plane, and a transmission path between a RANU plane and a RAN lower layer. As shown in FIG. 3, a PLMN and another PLMN can use a transport provided by the same transmission network operator. Also, a PLMN may use multiple transports provided by multiple transmission network operators. For example, as shown in FIG. 3, a transport provided by a transmission network operator B accommodates time synchronization signal traffic of a PLMN.

[0030] In the existing specifications for the NR network, when the TSN (Time-Sensitive Networking) function is enabled, the CNC (Central Network Controller) transmits scheduling assistance information to the SMF (Session Management function) via the TSN-AF (Application Function) and PCF (Policy Control Function). The SMF transmits the scheduling assistance information to the gNB (next generation Node-B) as TSCAI (Time-Sensitive Communication Assistance Information). The gNB refers to the scheduling information and appropriately determines the scheduling of radio part communications using a configured grant in the case of UL and semi-persistent scheduling in the case of DL.

[0031] On the other hand, in the NR network, the scheduling of the transmission path between the gNB-RU (Remote Unit) and the gNB-DU (Distributed Unit), the transmission path between the gNB-DU and the gNB-CU-UP (Central Unit - User Plane), and the transmission path between the gNB-CU-UP and the UPF (User plane function) could not be controlled based on information from the CNC. Therefore, for example, in the case of a transmission path where transmission is performed in a time-division manner, unnecessary waiting occurs between the wireless part and the wired part, causing delays.

[0032] The communication procedure in the embodiment of the present invention may be performed as shown in A) to E) below.

[0033] At the time of A)PDU session establishment, the SMF sets an appropriate network instance value based on, for example, the S-NSSAI (Single-Network Slice Selection Assistance Information) and DNN (Data Network Name). The SMF selects an appropriate UPF and notifies the network instance value. The UPF selects an appropriate interface, which may be a TEID. The SMF selects an appropriate transport installed between the UPF and the gNB-CU-UP and notifies the tSMF of the requesting PLMN information. The tSMF sets interfaces for the PLMN in the aUPF and bUPF and responds to the SMF.

[0034] B) The SMF notifies the gNB-CU-CP of the network instance value. The gNB-CU-CP selects an appropriate gNB-CU-UP and notifies the network instance value. The gNB-CU-UP selects an appropriate interface, which may be a TEID. The gNB-CU-CP selects an appropriate transport to be installed between the gNB-CU-UP and the gNB-DU, and notifies the tSMF of the requesting PLMN information. The tSMF configures interfaces for the PLMN in the aUPF and bUPF, and responds to the gNB-CU-CP.

[0035] C) The gNB-CU-CP configures the UL interface of the gNB-DU. At this time, the gNB-DU may determine the schedule using an internal MAC (Medium Access Control) function to obtain schedule assistance information. The gNB-DU may notify the determined traffic characteristics to a node that manages the transmission path between the gNB-DU and the gNB-CU (e.g., an OLT (Optical Line Terminal) in the case of a PON (Passive Optical Network)).

[0036] D) The gNB-CU-CP configures the DL interface of the transport between the gNB-CU-UP and the gNB-DU. At this time, the SMF may notify the transport of the determined traffic characteristics of the MAC function of the gNB-DU.

[0037] E) The SMF configures the DL interface of the transport between the UPF and the gNB-CU-UP. At this time, the SMF may inform the transport of the determined traffic characteristics of the gNB-DU MAC function.

[0038] Furthermore, the communication procedures in the embodiment of the present invention may be executed as follows: 1)-10) The above communication procedures A)-E) and the following communication procedures 1)-10) may be executed in parallel.

[0039] 1) The CNC determines a traffic pattern. The traffic pattern may be, for example, a stream definition and a gate opening / closing timing at a 5GS (5G System) bridge entrance / exit for each stream. The CNC notifies the SMF of the traffic pattern via the TSN-AF and PCF.

[0040] 2) The SMF configures the TSCAI based on the traffic pattern and notifies the RAN.

[0041] 3) The RAN (specifically the MAC function of the gNB-DU) decides the scheduling of the wireless communication part.

[0042] 4) The gNB-DU notifies the management node (e.g., OLT in the case of PON) of the transmission path between the gNB-RU and the gNB-DU of the determined wireless communication schedule. In addition, in order to support various wired transmission technologies, the management node may have a standardized API. Regarding the UL, the coordination between the wireless communication scheduling and the PON scheduling may be implemented as DBA (Dynamic Bandwidth Allocation).

[0043] 5) The gNB-CU-CP, which has received notification of the determined radio schedule from the gNB-DU, derives schedules required for communication on the transmission path between the gNB-DU and the gNB-CU-UP and the transmission path between the gNB-CU-UP and the UPF, based on the radio schedule. The gNB-CU-CP notifies each management node, for example, the tSMF of the transport, of the schedule information. When notifying the management node of the transmission path between the gNB-CU-UP and the UPF, for example, the tSMF of the transport, of the schedule information, the gNB-CU-CP may notify via the SMF. The gNB-CU-CP may notify the management node of the schedule of the wireless communication part, and each management node may correct the time difference due to the distance and use the schedule information for itself. In addition, in order to support various wired transmission technologies, the management node may have a standardized API.

[0044] 6) Each management node performs scheduling on each transmission path.

[0045] 7) The gNB-DU monitors whether the queue status within the device is appropriate for both DL and UL, and sends radio scheduling correction information to the gNB-CU-CP as necessary.

[0046] 8) The gNB-CU-CP, which has received radio schedule correction information from the gNB-DU, derives schedule correction information required for communication on the transmission path between the gNB-DU and the gNB-CU-UP and on the transmission path between the gNB-CU-UP and the UPF, based on the correction information. The gNB-CU-CP notifies each management node, for example, the tSMF of the transport, of the schedule correction information. When notifying the management node of the transmission path between the gNB-CU-UP and the UPF, for example, the tSMF of the transport, of the schedule correction information, the gNB-CU-CP may notify via the SMF. The gNB-CU-CP may notify the management node of the schedule correction information of the wireless communication part, and each management node may correct the time difference due to the distance and use it as schedule correction information for itself. In addition, in order to support various wired transmission technologies, the management node may have a standardized API.

[0047] 9) Each management node modifies the scheduling on each transmission path.

[0048] 10) By the above 1)-9), the wireless schedule and the schedules of each part of the wired transmission path are coordinated.

[0049] 4 is a sequence diagram for explaining an example (1) of PDU session establishment in an embodiment of the present invention. In FIG. 4, the TEID corresponding to the UL of UPF 30B is 1, the TEID corresponding to the DL of bUPF 30D is 2, the TEID corresponding to the UL is 3, the TEID corresponding to the DL of aUPF 30E is 4, and the TEID corresponding to the UL is 5.

[0050] In step S101, the UE 20 transmits a UL information transfer to the gNB-DU 10C. Then, the gNB-DU 10C transmits a UL-RRC message transfer to the gNB-CU-CP 10A (S102). Then, the gNB-CU-CP 10A transmits a UL-NAS message transfer to the AMF 30F (S103). Then, the AMF 30F transmits a PDU session establishment request to the SMF 30A (S104).

[0051] Fig. 5 is a sequence diagram for explaining an example (2) of PDU session establishment in an embodiment of the present invention. Following step S104 shown in Fig. 4, step S1041 is executed. In step S1041, SMF30A transmits a policy control request including S-NSSAI and DNN to PCF30J. Then, PCF30J transmits a query request to UDR30K (S1042). Then, UDR30K transmits a query response to PCF30J (S1043). Then, PCF30J transmits a policy control response including TSCAI to SMF30A. That is, SMF30A acquires TSCAI using S-NSSAI and DNN as keys. TSCAI may be composed of TSCAI for UL and TSCAI for DL.

[0052] Returning to FIG. 4 , in step S105, the SMF 30A transmits a PDU session establishment response to the AMF 30F. Then, the SMF 30A executes UPF selection and transport selection (S106). Then, the SMF 30A transmits a Packet Forwarding Control Protocol (PFCP) session establishment request to the UPF 30B (S107). The PFCP session establishment request in step S107 includes an appropriate network instance selected by the SMF based on the S-NSSAI and the DNN. The network instance encodes the name of the transport network operator that provides the transport and the type of transport service (e.g., deterministic communication with slot allocation) that the transport operator provides. Then, the UPF 30B transmits a PFCP session establishment response to the SMF 30A (S108). In step S108, the UPF 30B selects an appropriate local Fully Qualified TEID (F-TEID) based on the network instance, and includes it in the PFCP session establishment response. FIG. 4 shows an example where F-TEID=1.

[0053] In step S109, the SMF 30A transmits a PFCP session establishment request to the tSMF 30C. In the PFCP session establishment request in step S109, the SMF 30A assumes the use of another company's transmission network, sets the DL source interface and the UL destination interface as PLMN specific core, sets the DL destination interface and the UL source interface as PLMN specific access, and sets the company's own MCC (Mobile Country Code) / MNC (Mobile Network Code) as additional information in each setting. In addition, the PFCP session establishment request in step S109 includes information that sets the TEID corresponding to the outer header corresponding to the UL to 1. The SMF 30A sets the transport as one UPF. The tSMF 30C sets each of the multiple UPFs in the transport based on the setting. The tSMF 30C acts as a UPF for the SMF 30A and as an SMF for the transport. In addition, the PLMN-specific core may indicate the UPF in the PLMN, and the PLMN-specific access may indicate the gNB-CU-UP in the PLMN.

[0054] In step S110, the tSMF 30C transmits a PFCP session establishment request to the bUPF 30D. In the PFCP session establishment request in step S110, the tSMF 30C sets a PLMN-specific core in the DL source interface and the UL destination interface, and sets information in which the TEID corresponding to the UL outer header is set to 1. Next, the bUPF 30D transmits a PFCP session establishment response to the tSMF 30C in which the F-TEID corresponding to the DL is set to 2 and the F-TEID corresponding to the UL is set to 3 (S111). The bUPF 30D selects an appropriate TEID for DL ​​corresponding to the UPF based on the PLMN-ID.

[0055] In step S112, the tSMF 30C transmits a PFCP session establishment request to the aUPF 30E. In the PFCP session establishment request in step S112, the tSMF 30C sets a PLMN-specific access in the DL destination interface and the UL source interface, and sets information that the TEID corresponding to the UL outer header is 3. Next, the aUPF 30E transmits a PFCP session establishment response to the tSMF 30C in which the F-TEID corresponding to the DL is set to 4 and the F-TEID corresponding to the UL is set to 5 (S113). The aUPF 30E selects an appropriate TEID for UL corresponding to the gNB based on the PLMN-ID.

[0056] In step S114, the tSMF 30C transmits a PFCP session change request to the bUPF 30D with the TEID corresponding to the DL external header set to 4. Then, the bUPF 30D transmits a PFCP session change response to the tSMF 30C (S115). Then, the tSMF 30C transmits a PFCP session establishment response to the SMF 30A with the F-TEID corresponding to the DL set to 2 and the F-TEID corresponding to the UL set to 5 (S116). The tSMC 30C, the bUPF 30D, and the aUPF 30E appear as a single UPF from the outside.

[0057] In step S117, SMF 30A transmits a PFCP session change request with the TEID corresponding to the DL outer header set to 2 to UPF 30B. Then, UPF 30B transmits a PFCP session change response to SMF 30A (S118). Then, SMF 30A transmits a message transfer request including the UL endpoint IP address, information with the GTP (GPRS Tunnelling Protocol)-TEID set to 5, and a network instance to AMF 30F (S119). The message transfer request may further include schedule information based on the TSCAI acquired by SMF 30A. The message transfer request requests resource configuration for the PDU session. Then, AMF 30F transmits a message transfer response to SMF 30A (S120).

[0058] Fig. 6 is a sequence diagram for explaining an example (3) of PDU session establishment in an embodiment of the present invention. In Fig. 6, the TEID corresponding to DL of gNB-CU-UP10A is 6, the TEID corresponding to UL is 7, the TEID corresponding to DL of bUPF30H is 8, the TEID corresponding to UL is 9, the TEID corresponding to DL of aUPF30I is 10, the TEID corresponding to UL is 11, and the TEID corresponding to DL of gNB-DU is 12.

[0059] In step S121, the AMF 30F transmits a PDU session resource setting request including the UL endpoint IP address, information indicating that the GTP-TEID is 5, and a network instance to the gNB-CU-CP 10A. Here, the gNB-CU-CP 10A may select an appropriate gNB-CU-UP 10B and a transmission network operator. The network instance may be an appropriate network instance selected by the gNB-CU-CP 10A based on the S-NSSAI and the DNN. The network instance is encoded with the name of the transmission network operator that provides the transport and the type of transmission service (e.g., deterministic communication with slot allocation) provided by the transmission network operator. The PDU session resource setting request may further include schedule information based on the TSCAI acquired by the SMF 30A.

[0060] Next, the gNB-CU-CP10A transmits a bearer setting request including the transport layer address of the UL, information that the GTP-TEID is 5, and a network instance to the gNB-CU-UP10B (S122). The network instance is an encoded version of the name of the transport network operator that provides the transport and the type of transmission service provided by the transport network operator (e.g., deterministic communication with slot allocation, etc.). Next, the gNB-CU-UP10B transmits a bearer setting response to the gNB-CU-CP10A in which the GTP-TEID is set to 6 as the transport layer address corresponding to the DL and the GTP-TEID is set to 7 as the transport layer address corresponding to the UL (S123). In step S123, the gNB-CU-UP10B selects an appropriate local GTP-TEID based on the network instance in the UL and includes it in the bearer setting response. FIG. 6 shows an example in which the GTP-TEID is set to 6 for the DL and the GTP-TEID is set to 7 for the UL.

[0061] In step S124, the gNB-CU-CP10A transmits a PFCP session establishment request to the tSMF30G. In the PFCP session establishment request in step S124, a PLMN-specific core is set in the DL source interface and the UL destination interface, and a PLMN-specific access is set in the DL destination interface and the UL source interface. In addition, the PFCP session establishment request in step S124 includes information that the TEID corresponding to the outer header corresponding to the UL is set to 7. The gNB-CU-CP10A sets the transport as one UPF. The tSMF30G sets each of the multiple UPFs in the transport based on the setting. The tSMF30G acts as a UPF for the gNB-CU-CP10A and as an SMF for the transport.

[0062] In step S125, the tSMF 30G transmits a PFCP session establishment request to the bUPF 30H. In the PFCP session establishment request in step S125, the tSMF 30G sets a PLMN-specific core in the DL source interface and the UL destination interface, and sets information that the TEID corresponding to the UL outer header is 7. Next, the bUPF 30H transmits a PFCP session establishment response to the tSMF 30G in which the F-TEID corresponding to the DL is set to 8 and the F-TEID corresponding to the UL is set to 9 (S126). The bUPF 30H selects an appropriate TEID for DL ​​corresponding to the gNB-CU-UP based on the PLMN-ID.

[0063] In step S127, the tSMF 30G transmits a PFCP session establishment request to the aUPF 30I. In the PFCP session establishment request in step S127, the tSMF 30G sets a PLMN specific access in the DL destination interface and the UL source interface, and sets information that the TEID corresponding to the UL outer header is 9. Next, the aUPF 30I transmits a PFCP session establishment response to the tSMF 30G in which the F-TEID corresponding to the DL is set to 10 and the F-TEID corresponding to the UL is set to 11 (S128). The aUPF 30I selects an appropriate TEID for UL corresponding to the gNB-DU based on the PLMN-ID.

[0064] In step S129, the tSMF 30G transmits a PFCP session change request to the bUPF 30H, in which the TEID corresponding to the DL external header is set to 10. Then, the bUPF 30H transmits a PFCP session change response to the tSMF 30G (S130). Then, the tSMF 30G transmits a PFCP session establishment response to the gNB-CU-CP 10A, in which the F-TEID corresponding to DL is set to 8 and the F-TEID corresponding to UL is set to 11 (S131). The tSMC 30G, the bUPF 30H, and the aUPF 30I appear as a single UPF from the outside.

[0065] In step S132, the gNB-CU-CP10A transmits a PFCP session modification request to the gNB-CU-UP10B with the TEID corresponding to the DL outer header set to 8. Then, the gNB-CU-UP10B transmits a PFCP session modification response to the gNB-CU-CP10A (S133). Then, the gNB-CU-CP10A transmits a UE context modification request including a UL transport layer address and information with the GTP-TEID set to 11 to the gNB-DU10C (S134). The UE context modification request may further include schedule assistance information based on the TSCAI acquired by the SMF30A. Then, the gNB-DU10C transmits a UE context modification response to the gNB-CU-CP10A with the DL transport layer address and information with the GTP-TEID set to 12 (S135). The UE context change response may further include “TSC Traffic Characteristics” as radio side scheduling information actually established based on the TSCAI-based schedule assistance information acquired by SMF30A in gNB-DU10C.

[0066] FIG. 7 is a sequence diagram for explaining an example (4) of PDU session establishment in an embodiment of the present invention. The steps shown in FIG. 7 may be executed in parallel with step S135. In step S1351, the gNB-DU10C notifies the management node 30L (e.g., OLT in the case of PON) of the transmission path between the gNB-RU and the gNB-DU10C of the TSC traffic characteristic information. The management node appropriately executes scheduling of the transmission path between the gNB-RU and the gNB-DU10C based on the TSC traffic characteristic information. Then, the management node 30L of the transmission path between the gNB-RU and the gNB-DU10C transmits a response to the gNB-DU10C (S1352).

[0067] Returning to Fig. 6, if step S132 and step S133 are changed to a bearer context modification request and a bearer context modification response, the amount of change in gNB-CU-UP can be suppressed.

[0068] In step S136, the gNB-CU-CP10A transmits a PFCP session change request with the TEID corresponding to the DL outer header set to 12 to the tSMF30G. The PFCP session change request may further include TSC information generated based on the TSC traffic characteristic information. The TSC information may be the same as the TSC traffic characteristic information. The tSMF30G appropriately performs scheduling of the transmission path between the aUPF30I and the bUPF30H based on the TSC information. Next, the tSMF30G transmits a PFCP session change request with the TEID corresponding to the DL outer header set to 12 to the aUPF30I (S137). Next, the aUPF30I transmits a PFCP session change response to the tSMF30G (S138). Next, the tSMF30G transmits the PFCP session change response to the gNB-CU-CP10A (S139).

[0069] In step S140, the gNB-CU-CP10A transmits a DL-RRC message transfer indicating that the PDU session establishment has been accepted to the gNB-DU10C. Then, the gNB-DU10C transmits an RRCReconfiguration indicating that the PDU session establishment has been accepted to the UE20 (S141). Then, the UE20 transmits an RRCReconfigurationComplete to the gNB-DU10C (S142). Then, the gNB-DU10C transmits a UL-RRC message transfer indicating that the RRC reconfiguration has been completed to the gNB-CU-CP10A (S143). Then, the gNB-CU-CP10A transmits a PDU session resource setting response indicating that the DL endpoint IP address and the GTP-TEID are 6 to the AMF30F (S144). The PDU session resource setting response may further include TSC traffic characteristic information.

[0070] FIG. 8 is a sequence diagram for explaining an example (5) of PDU session establishment in an embodiment of the present invention. In step S145, the AMF 30F transmits a PDU session update request indicating the DL endpoint IP address and the GTP-TEID being 6 to the SMF 30A. The PDU session resource update request may further include TSC traffic characteristics information. Next, the SMF 30A transmits a PFCP session change request with the TEID corresponding to the DL outer header set to 6 to the tSMF 30C (S146). The PFCP session change request may further include TSC information generated based on the TSC traffic characteristics information. Note that the TSC information may be the same as the TSC traffic characteristics information. The tSMF 30C appropriately performs scheduling of the transmission path between the aUPF 30E and the bUPF 30D based on the TSC information. Next, the tSMF 30C transmits a PFCP session change request with the TEID corresponding to the DL outer header set to 6 to the aUPF 30I (S147). Next, the aUPF 30I transmits a PFCP session change response to the tSMF 30G (S148). Next, the tSMF 30C transmits the PFCP session change response to the SMF 30A (S149). Next, the SMF 30A transmits a PDU session update response to the AMF 30F (S150).

[0071] By applying the above-mentioned embodiment, it is possible to promote the growth of transmission network operators who provide transmission lines with advanced transmission capabilities such as deterministic communication with slot allocation, or with added value such as relaying via time synchronization servers. PLMNs can provide subscribers with advanced services that are unlikely to become large in traffic volume using the services of transmission network operators. In addition, by enriching the content of the traffic characteristics provided to the transmission lines off-path, it is expected that mainly optical transmission lines can be effectively utilized.

[0072] In addition, PLMNs can select other companies' transmission paths for each call depending on the traffic characteristics. Transmission network operators can respond to transmission service requests for each call from multiple PLMNs. Transmission networks can obtain traffic characteristics off-path.

[0073] Furthermore, by applying the above-mentioned embodiment, it is possible to reduce delay. It is possible to efficiently use the transmission path resources of the wired portion. Also, as a secondary effect, although the guarantee of low jitter or isochronism is originally a function of DS-TT (Device-Side TSN Translator) and NW-TT (Network-Side TSN Translator), if the RAN always performs scheduling according to TSCAI, it is possible to perform low jitter isochronous communication even without DS-TT and NW-TT.

[0074] That is, in a wireless communication system, it is possible to improve the efficiency of use of user data transmission paths.

[0075] (Device configuration) Next, a functional configuration example of the base station 10 and the terminal 20 that execute the processes and operations described above will be described. The base station 10 and the terminal 20 include functions for implementing the above-mentioned embodiments. However, the base station 10 and the terminal 20 may each include only a part of the functions in the embodiments.

[0076] <Base station 10> 9 is a diagram showing an example of a functional configuration of the base station 10 in the embodiment of the present invention. As shown in FIG. 9, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in FIG. 9 is merely an example. The functional divisions and names of the functional units may be any as long as they can execute the operations related to the embodiment of the present invention. The network node 30 may have the same functional configuration as the base station 10.

[0077] The transmitting unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and transmitting the signal wirelessly. The transmitting unit 110 also transmits an inter-network node message to another network node. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signal. The transmitting unit 110 also has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, etc. to the terminal 20. The receiving unit 120 also receives an inter-network node message from another network node.

[0078] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20. The content of the setting information is, for example, information related to a PDU session.

[0079] The control unit 140 performs control related to communication by a PDU session as described in the embodiment. In addition, the control unit 140 controls communication with the terminal 20 based on a UE capability report related to radio parameters received from the terminal 20. A functional unit related to signal transmission in the control unit 140 may be included in the transmitting unit 110, and a functional unit related to signal reception in the control unit 140 may be included in the receiving unit 120.

[0080] <Terminal 20> Fig. 10 is a diagram showing an example of a functional configuration of terminal 20 in the embodiment of the present invention. As shown in Fig. 10, terminal 20 has transmitting unit 210, receiving unit 220, setting unit 230, and control unit 240. The functional configuration shown in Fig. 10 is merely an example. The functional divisions and names of the functional units may be any names as long as they can execute the operations related to the embodiment of the present invention.

[0081] The transmitter 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiver 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. The receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, etc. transmitted from the base station 10. For example, the transmitter 210 transmits a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), etc. to another terminal 20 as D2D communication, and the receiver 120 receives the PSCCH, the PSSCH, the PSDCH, or the PSBCH, etc. from the other terminal 20.

[0082] The setting unit 230 stores various types of setting information received from the base station 10 by the receiving unit 220. The setting unit 230 also stores setting information that is set in advance. The content of the setting information is, for example, information related to a PDU session.

[0083] As described in the embodiment, the control unit 240 performs control related to communication by the PDU session. The function unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the function unit related to signal reception in the control unit 240 may be included in the reception unit 220.

[0084] (Hardware configuration) The block diagrams (FIGS. 9 and 10) used to explain the above embodiments show functional blocks. These functional blocks (components) are realized by any combination of at least one of hardware and software. Furthermore, the method of realizing each functional block is not particularly limited. That is, 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 (e.g., using wires, wirelessly, etc.). The functional blocks may be realized by combining the one device or the multiple devices with software.

[0085] Functions include, but are not limited to, judgment, determination, judgment, calculation, computation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, assignment, etc. For example, a functional block (component) that performs the function of transmission is called a transmitting unit or a transmitter. In either case, as described above, there is no particular limitation on the method of realization.

[0086] For example, the base station 10, the terminal 20, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 11 is a diagram showing an example of a hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The above-mentioned base station 10 and the terminal 20 may be physically configured as a computer device 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, etc.

[0087] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0088] Each function in the base station 10 and the terminal 20 is realized by loading a specific software (program) onto hardware such as a processor 1001, a memory device 1002, etc., so that the processor 1001 performs calculations, controls communications by the communication device 1004, and controls at least one of reading and writing of data in the memory device 1002 and the auxiliary memory device 1003.

[0089] The processor 1001 controls the entire computer by running, for example, an operating system. The processor 1001 may be configured as a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, etc. For example, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0090] Moreover, the processor 1001 reads out 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 the program. As the program, a program that causes a computer to execute at least a part of the operations described in the above-mentioned embodiment is used. For example, the control unit 140 of the base station 10 shown in FIG. 9 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Also, for example, the control unit 240 of the terminal 20 shown in FIG. 10 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above-mentioned various processes have been described as being executed by one processor 1001, they may be executed by two or more processors 1001 simultaneously or sequentially. The processor 1001 may be implemented by one or more chips. The program may be transmitted from a network via a telecommunication line.

[0091] The storage device 1002 is a computer-readable recording medium, and may be configured by at least one of, for example, a Read Only Memory (ROM), an Erasable Programmable ROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), a Random Access Memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory (primary storage device), etc. The storage device 1002 can store a program (program code), software modules, etc. that are executable to implement a communication method according to an embodiment of the present disclosure.

[0092] 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 including at least one of the storage device 1002 and the auxiliary storage device 1003.

[0093] The communication device 1004 is hardware (transmission and reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, 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., in order to realize at least one of, for example, Frequency Division Duplex (FDD) and Time Division Duplex (TDD). For example, a transmission and reception antenna, an amplifier unit, a transmission and reception unit, a transmission line interface, etc. may be realized by the communication device 1004. The transmission and reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated from each other.

[0094] 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. The input device 1005 and the output device 1006 may be integrated into one device (e.g., a touch panel).

[0095] In addition, 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.

[0096] Furthermore, the base station 10 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. For example, the processor 1001 may be implemented using at least one of these pieces of hardware.

[0097] (Summary of the embodiment) As described above, according to an embodiment of the present invention, a network node is provided which has a transmitter that transmits scheduling support information to a gNB-DU (next generation Node B Distributed Unit) and a receiver that receives radio side scheduling information generated by the gNB-DU based on the scheduling support information, and the transmitter transmits scheduling information based on the radio side scheduling information to a transport installed between the gNB-DU and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) in a data transmission path.

[0098] The above configuration can reduce delays. The wired transmission path resources can be used efficiently. As a secondary effect, while guaranteeing low jitter or isochronism is essentially a function of DS-TT (Device-Side TSN Translator) and NW-TT (Network-Side TSN Translator), if the RAN always performs scheduling according to TSCAI, low jitter isochronous communication can be performed without DS-TT or NW-TT. In other words, the utilization efficiency of user data transmission paths can be improved in wireless communication systems.

[0099] The gNB-CU-UP may further include a control unit that generates a schedule for a data transmission path between the gNB-DU and the gNB-CU-UP based on the wireless side scheduling information, and transmits the generated schedule to the transport. This configuration can reduce delays and efficiently use the transmission path resources of the wired portion.

[0100] Also, according to an embodiment of the present invention, there is provided a network node comprising a transmitter that transmits scheduling support information to an AMF (Access and Mobility Management Function), and a receiver that receives radio side scheduling information generated by a gNB-DU (next generation Node B Distributed Unit) based on the scheduling support information from the AMF, wherein the transmitter transmits the radio side scheduling information to a transport installed between a UPF (User Plane Function) and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) in a data transmission path.

[0101] The above configuration can reduce delays. The wired transmission path resources can be used efficiently. As a secondary effect, while guaranteeing low jitter or isochronism is essentially a function of DS-TT (Device-Side TSN Translator) and NW-TT (Network-Side TSN Translator), if the RAN always performs scheduling according to TSCAI, low jitter isochronous communication can be performed without DS-TT or NW-TT. In other words, the utilization efficiency of user data transmission paths can be improved in wireless communication systems.

[0102] Furthermore, according to an embodiment of the present invention, there is provided a network node having a receiving unit that receives scheduling support information, a control unit that determines radio side scheduling information based on the scheduling support information, and a transmitting unit that transmits the radio side scheduling information to a management node of a data transmission path between the network node and a gNB-RU (next generation Node B - Remote Unit).

[0103] The above configuration can reduce delays. The wired transmission path resources can be used efficiently. As a secondary effect, while guaranteeing low jitter or isochronism is essentially a function of DS-TT (Device-Side TSN Translator) and NW-TT (Network-Side TSN Translator), if the RAN always performs scheduling according to TSCAI, low jitter isochronous communication can be performed without DS-TT or NW-TT. In other words, the utilization efficiency of user data transmission paths can be improved in wireless communication systems.

[0104] In addition, according to an embodiment of the present invention, there is provided a communication method in which a network node executes a transmission procedure of transmitting scheduling support information to a gNB-DU (next generation Node B Distributed Unit), a reception procedure of receiving radio side scheduling information generated by the gNB-DU based on the scheduling support information, and a procedure of transmitting scheduling information based on the radio side scheduling information to a transport installed between the gNB-DU and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) in a data transmission path.

[0105] The above configuration can reduce delays. The wired transmission path resources can be used efficiently. As a secondary effect, while guaranteeing low jitter or isochronism is essentially a function of DS-TT (Device-Side TSN Translator) and NW-TT (Network-Side TSN Translator), if the RAN always performs scheduling according to TSCAI, low jitter isochronous communication can be performed without DS-TT or NW-TT. In other words, the utilization efficiency of user data transmission paths can be improved in wireless communication systems.

[0106] (Supplementary embodiment) Although the embodiment of the present invention has been described above, the disclosed invention is not limited to such an embodiment, and those skilled in the art will understand various modifications, modifications, alternatives, replacements, and the like. Although the description has been given using specific numerical examples to facilitate understanding of the invention, unless otherwise specified, those numerical values ​​are merely examples and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention, and matters described in two or more items may be used in combination as necessary, and matters described in one item may be applied to matters described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. 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. For convenience of the processing description, the network node 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 a processor contained in the network node 30 in accordance with an embodiment of the present invention and the software operated by a processor contained in the terminal 20 in accordance with an embodiment of the present invention may each be stored in a random access memory (RAM), flash memory, read only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0107] Furthermore, the notification of information is not limited to the aspects / embodiments described in the present disclosure, and may be performed using other methods. For example, 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. Furthermore, the RRC signaling may be called an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0108] Each aspect / embodiment described in the present disclosure may be applied to at least one of systems using LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication 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)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems, and next-generation systems extended based on these. In addition, a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A and 5G, etc.) may be applied.

[0109] The steps, sequences, flow charts, etc. of each aspect / embodiment described herein may be reordered unless inconsistent. For example, the methods described in this disclosure present elements of various steps using an example order, and are not limited to the particular order presented.

[0110] In this specification, a specific operation performed by the network node 30 may be performed by its upper node in some cases. In a network consisting of one or more network nodes including the network node 30, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the network node 30 and other network nodes other than the network node 30 (e.g., MME or S-GW, etc., but are not limited to these). Although the above example illustrates a case where there is one other network node other than the network node 30, the other network node may be a combination of multiple other network nodes (e.g., MME and S-GW).

[0111] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0112] 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 transmitted to another device.

[0113] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0114] 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.

[0115] Additionally, software, instructions, information, etc. may be transmitted or received over a transmission medium. For example, if the software is transmitted from a website, server, or other remote source using wired and / or wireless technologies (such as coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL)), and / or wireless technologies (such as infrared, microwave, etc.), then these wired and / or wireless technologies are included within the definition of transmission media.

[0116] The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, 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.

[0117] In addition, the terms described in this disclosure and the terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Also, a signal may be a message. Also, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0118] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0119] In addition, the information, parameters, etc. described in the present disclosure may be represented using absolute values, may be represented using relative values ​​from a predetermined value, or may be represented using other corresponding information. For example, a radio resource may be indicated by an index.

[0120] The names used for the above-mentioned parameters are not limiting in any way. Moreover, the formulas 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 limiting in any way.

[0121] In the present disclosure, terms such as "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", "cell group", "carrier", "component carrier", etc. may be used interchangeably. A base station may also be referred to by terms such as a macro cell, a small cell, a femto cell, a pico cell, etc.

[0122] A base station can accommodate one or more (e.g., three) cells. When 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 be provided with communication services by a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or a base station subsystem that provides communication services in this coverage.

[0123] In this disclosure, the terms "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably.

[0124] 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.

[0125] At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a moving body, the moving body itself, etc. The moving body may be a vehicle (e.g., a car, an airplane, etc.), an unmanned moving body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). At least one of the base station and the mobile station may include a device that does not necessarily move during 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.

[0126] Furthermore, the base station in the present disclosure may be read as a user terminal. For example, each aspect / embodiment of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the terminal 20 may be configured to have the functions of the above-mentioned network node 30. Furthermore, terms such as "uplink" and "downlink" may be read as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may be read as a side channel.

[0127] Similarly, a user terminal in the present disclosure may be read as a base station. In this case, the base station may be configured to have the functions of the above-mentioned user terminal.

[0128] As used in this disclosure, the terms "determining" and "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), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in a memory), and the like. In addition, "judgment" and "decision" can include considering resolving, selecting, choosing, establishing, comparing, etc., to be a "judgment" or "decision." In other words, "judgment" and "decision" can include considering some action to be a "judgment" or "decision." In addition, "judgment" can be interpreted as "assuming," "expecting," "considering," etc.

[0129] The terms "connected," "coupled," or any variation thereof, refer 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. For example, "connected" may be read as "access." As used in this disclosure, 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.

[0130] The reference signal may be abbreviated as RS (Reference Signal) and may be called a pilot depending on the applicable standard.

[0131] As used in this disclosure, 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."

[0132] 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.

[0133] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0134] When the terms "include," "including," and variations thereof are used in this disclosure, these terms are intended to be inclusive, similar to the term "comprising." Further, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0135] In this disclosure, where articles have been added due to translation, such as a, an, and the in English, the disclosure may include that the nouns following these articles are in the plural form.

[0136] In the present disclosure, the term "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 "coupled" may also be interpreted in the same way as "different."

[0137] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched according to execution. In addition, notification of specific information (e.g., notification that "X is the case") is not limited to being done explicitly, but may be done implicitly (e.g., not notifying the specific information).

[0138] In this disclosure, the TSCAI is an example of scheduling assistance information, and the TSC traffic characteristic information is an example of wireless side scheduling information.

[0139] Although the present disclosure has been described in detail above, it is clear to those 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 in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0140] 10 base station 110 Transmitter 120 Receiving unit 130 Setting section 140 Control section 20 Terminals 210 Transmitter 220 Receiving unit 230 Setting section 240 Control Unit 30 Network Nodes 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output device

Claims

1. A transmitter that transmits scheduling support information to a gNB-DU (next generation Node B Distributed Unit); A receiving unit that receives radio side scheduling information generated by the gNB-DU based on the scheduling support information, The transmitting unit is a network node that transmits schedule information based on the radio side scheduling information to a transport installed between the gNB-DU and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) on a data transmission path.

2. Further comprising a control unit that generates a schedule for a data transmission path between the gNB-DU and the gNB-CU-UP based on the radio side scheduling information; The network node of claim 1 , further comprising a network node operable to transmit the generated schedule to the transport.

3. A sending unit that sends the scheduling assistance information to an Access and Mobility Management Function (AMF); A receiving unit that receives radio side scheduling information generated by a next generation Node B Distributed Unit (gNB-DU) based on the scheduling support information from the AMF, The transmitter transmits the radio side scheduling information to a transport installed between a UPF (User Plane Function) and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) in a data transmission path. A network node.

4. A transmission procedure for transmitting scheduling support information to a gNB-DU (next generation Node B Distributed Unit); A receiving procedure for receiving radio side scheduling information generated by the gNB-DU based on the scheduling support information; A communication method in which a network node executes a procedure of transmitting schedule information based on the radio side scheduling information to a transport installed between the gNB-DU and a gNB-CU-UP (next generation Node B - Central Unit - User Plane) on a data transmission path.

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