Network node, terminal, and communication method

Abstract

In voice communication using a radio communication system with geostationary satellites, use a timer with an appropriate setting. [Solution] The network node includes a receiving unit that receives a registration request message from a terminal, which contains information indicating that the terminal is configured to be primarily a voice service, from a base station that provides NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite; and a control unit that sets the value of a timer related to message exchange between the terminal and itself to a value defined for communication via a geostationary satellite.

Description

[Technical Field]

[0001] The present invention relates to a network node, a terminal, and a communication method in a communication system. [Background Art]

[0002] In 3GPP (registered trademark) (3rd Generation Partnership Project), a radio communication system called 5G or NR (New Radio) (hereinafter, said radio communication system is referred to as "5G" or "NR") is being studied to achieve further increase in system capacity, further higher speed of data transmission rate, further reduction in latency in a radio section, and the like. In 5G, various radio technologies are being studied to satisfy the requirement that the latency in the radio section be 1 ms or less while achieving a throughput of 10 Gbps or more.

[0003] In NR, a network architecture including 5GC (5G Core Network) corresponding to EPC (Evolved Packet Core), which is a core network in the network architecture of LTE (Long Term Evolution), and NG-RAN (Next Generation - Radio Access Network) corresponding to E-UTRAN (Evolved Universal Terrestrial Radio Access Network), which is RAN (Radio Access Network) in the network architecture of LTE, is being studied (for example, Non-Patent Document 1).

[0004] Furthermore, the specifications for an IMS (IP Multimedia Subsystem) network are being considered as an IMS architecture to support the data channel capabilities of terminals (see, for example, Non-Patent Document 2). In an IMS data channel network, a DCSF (Data Channel Signaling Function) with signaling capabilities, an MF (Media Function) with media-related functions, and a DCAS (Data Channel Application Server) which is an application server are deployed on both the sending and receiving ends.

[0005] Furthermore, in 3GPP Rel-19, a challenge in realizing IMS voice terminal-satellite-UE communication is reducing the impact on existing specifications when deploying 5GC network functions and IMS components on satellites (see, for example, Non-Patent Document 3). Here, terminal-satellite-UE communication refers to terminal-to-terminal communication under routing that keeps user plane traffic within the satellite. The types of satellites dealt with are geostationary Earth Orbit (GEO), low Earth Orbit (LEO), and medium Earth Orbit (MEO). In addition, for low Earth Orbit and medium Earth Orbit satellites, there are cases where a satellite constellation is formed without using inter-satellite links (ISL), and cases where a satellite constellation is formed using inter-satellite links. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] 3GPP TS 23.501 V19.2.1(2025-01) [Non-Patent Document 2] 3GPP TS 23.228 V19.2.0(2024-12) [Non-Patent Document 3] 3GPP TR23.700-29 V19.0.0(2024-06) [Non-Patent Document 4] 3GPP TS 24.501 V19.1.1(2024-12) [Non-Patent Document 5] 3GPP TS 23.502 V19.2.0(2024-12) [Non-Patent Document 6] 3GPP TS 38.331 V18.4.0(2024-12) [Overview of the project] [Problems that the invention aims to solve]

[0007] 3GPP Rel-20 will discuss voice communications via geostationary satellites (GEO), including the efficient use of wireless resources and the use of wireless access for Narrow Band (NB) IoT (Internet of Things). A challenge identified here is the long setting of the Non-Access Stratum (NAS) timer.

[0008] This invention has been made in view of the above points, and aims to use a timer with an appropriate set value in voice communication using a wireless communication system with geostationary satellites. [Means for solving the problem]

[0009] According to the disclosed technology, a network node is provided that includes a receiving unit that receives a registration request message from a terminal, which contains information indicating that the terminal is configured to be primarily a voice service, from a base station that provides NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite; and a control unit that sets the value of a timer for message exchange between the terminal and itself to a value defined for communication via a geostationary satellite. [Effects of the Invention]

[0010] According to the disclosed technique, a timer with an appropriate set value can be used in voice communication by a wireless communication system using a geostationary satellite. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] [Figure 1] FIG. 1 is a diagram for explaining an example of a communication system. [Figure 2] FIG. 2 is a diagram for explaining an example of a communication system in a roaming environment. [Figure 3] FIG. 3 is a diagram for explaining an example of an IMS data channel network. [Figure 4] FIG. 4 is a diagram showing a first example of NTN. [Figure 5] FIG. 5 is a diagram showing a second example of NTN. [Figure 6] FIG. 6 is a diagram showing a third example of NTN. [Figure 7] FIG. 7 is a diagram showing an example of a first sequence diagram according to an embodiment of the present invention. [Figure 8] FIG. 8 is a diagram showing an example of a second sequence diagram according to an embodiment of the present invention. [Figure 9] FIG. 9 is a diagram showing an example of a third sequence diagram according to an embodiment of the present invention. [Figure 10] FIG. 10 is a diagram showing an example of the functional configuration of a base station 10 and a network node 30 according to an embodiment of the present invention. [Figure 11] FIG. 11 is a diagram showing an example of the functional configuration of a terminal 20 according to an embodiment of the present invention. [Figure 12] FIG. 12 is a diagram showing an example of the hardware configuration of a base station 10, a terminal 20, and a network node 30 according to an embodiment of the present invention. [Figure 13] FIG. 13 is a diagram showing an example of the configuration of a vehicle 2001 according to an embodiment of the present invention. MODE FOR CARRYING OUT THE INVENTION

[0012] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

[0013] 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 technology is, for example, existing LTE, but is not limited to existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification shall have a broad meaning including LTE-Advanced, schemes after LTE-Advanced (e.g., NR), or wireless LAN (Local Area Network).

[0014] In addition, in the embodiment of the present invention, that a radio parameter or the like is "configured" may mean that a predetermined value is pre-configured, or may mean that a radio parameter notified from the network node 30 or the terminal 20 is 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 the terminal 20, and a plurality of network nodes 30. Hereinafter, it is assumed that one network node 30 corresponds to each function, but one network node 30 may implement a plurality of functions, or a plurality of network nodes 30 may implement one function. 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 radio access functionality, which may include a base station 10, and is connected to the UE, AMF (Access and Mobility Management Function), and UPF (User plane function). The AMF is a network node 30 having functions such as terminating the RAN interface, terminating the NAS (Non-Access Stratum), registration management, connection management, reachability management, and terminal mobility management. The UPF is a network node 30 interconnected with the DN (Data Network) and having functions related to processing user plane data, such as PDU (Protocol Data Unit) session points to the outside, packet routing and forwarding, and user plane QoS (Quality of Service) handling. The UPF and DN constitute a network slice. In the wireless communication network in the embodiment of the present invention, multiple network slices are constructed.

[0017] AMF is connected to 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). AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network nodes 30 that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.

[0018] SMF is a network node 30 that has functions such as session management, IP (Internet Protocol) address allocation and management for UEs, DHCP (Dynamic Host Configuration Protocol) functionality, ARP (Address Resolution Protocol) proxy, and roaming functionality. NEF is a network node 30 that has the function of notifying other NFs (Network Functions) of capabilities and events. NSSF is a network node 30 that has functions such as selecting the network slice to which the UE connects, determining the allowed NSSAI (Network Slice Selection Assistance Information), determining the NSSAI to be set, and determining the AMF set to which the UE connects. PCF is a network node 30 that has the function of controlling network policy. AF is a network node 30 that has the function of controlling application servers. NRF is a network node 30 that has the function of discovering NF instances that provide services. UDM is a network node 30 that manages subscriber data and authentication data. UDM is connected to UDR (User Data Repository) which holds the said data. Furthermore, the UDM may include, or be able to connect to, an ARPF (Authentication credential Repository and Processing Function) that has the function of a repository and processing for authentication credentials, and a SIDF (Subscription Identifier De-concealing Function) that has the function of decrypting subscriber identifiers.

[0019] Figure 2 is a diagram illustrating an example of a communication system in a roaming environment. As shown in Figure 2, the network consists of a terminal 20 (UE) and multiple network nodes 30. Hereafter, one network node 30 will be assumed to correspond to each function, however, one network node 30 may implement multiple functions, or multiple network nodes 30 may implement one function. Furthermore, the "connection" described below may be a logical connection or a physical connection.

[0020] The RAN is a network node 30 with wireless access capabilities and is connected to the UE, AMF, and UPF. The AMF is a network node 30 with functions such as RAN interface termination, NAS termination, registration management, connection management, reachability management, and mobility management. The UPF is a network node 30 interconnected with the DN and has functions such as external PDU session point, packet routing and forwarding, and user plane QoS handling. The UPF and DN constitute a network slice. In the wireless communication network according to the embodiment of the present invention, multiple network slices are constructed.

[0021] AMF is connected to UE, RAN, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, AF, and SEPP (Security Edge Protection Proxy). AMF, SMF, NSSF, NEF, NRF, UDM, AUSF, PCF, and AF are network nodes 30 that are interconnected via interfaces based on their respective services: Namf, Nsmf, Nnssf, Nnef, Nnrf, Nudm, Nausf, Npcf, and Naf.

[0022] SMF is a network node 30 with functions such as session management, UE IP address assignment and management, DHCP functionality, ARP proxy, and roaming functionality. NEF is a network node 30 with the function of notifying other NFs of capabilities and events. NSSF is a network node 30 with functions such as selecting the network slice to which the UE connects, determining the allowed NSSAI, determining the NSSAI to be configured, and determining the AMF set to which the UE connects. PCF is a network node 30 with the function of controlling network policy. AF is a network node 30 with the function of controlling application servers. NRF is a network node 30 with the function of discovering NF instances that provide services. SEPP is an opaque proxy that filters control plane messages between PLMNs (Public Land Mobile Networks). vSEPP shown in Figure 2 is SEPP in the visited network, and hSEPP is SEPP in the home network.

[0023] As shown in Figure 2, the UE is in a roaming environment connected to the RAN and AMF in the VPLMN (Visited PLMN). The VPLMN and HPLMN (Home PLMN) are connected via vSEPP and hSEPP. The UE can communicate with the HPLMN's UDM, for example, via the VPLMN's AMF.

[0024] Figure 3 is a diagram illustrating an example of an IMS data channel network. As shown in Figure 3, the IMS data channel network consists of a terminal 20 (UE) and multiple network nodes 30 in both the originating network and the terminating network. Hereafter, one network node 30 will be assumed to correspond to each function, but one network node 30 may implement multiple functions, or multiple network nodes 30 may implement one function. Also, the "connection" described below may be a logical connection or a physical connection. The network node 30 has, for example, the following functions as described in Non-Patent Literature 2.

[0025] The IMS-AGW (Access Gateway) is a network node 30 that has the functions of a gateway between the UE and the IMS network, as well as functions related to voice communication access processing.

[0026] P-CSCF (Proxy-Call Session Control Function) is a network node 30 that has proxy functions between the UE and the IMS network, as well as access control functions for voice communications.

[0027] S-CSCF (Serving-Call Session Control Function) is a network node 30 that has functions related to session control for the UE.

[0028] The I-CSCF (Interrogate-Call Session Control Function) is a network node 30 that is the connection point on the receiving side between networks in the IMS network (for example, the sending side and the receiving side), and has functions such as forwarding received SIP requests to the S-CSCF of its own network.

[0029] The IMS AS (IP Multimedia Subsystem Application Server) is a network node 30 in the IMS network that has functions such as communicating with the DCSF for event notification and receiving data channel control instructions from the DCSF and communicating with the MF. The IMS AS also receives a registration request for the communication termination point from the DCSF (Data Channel Signaling Function), converts the received registration request into a SIP Register, and sends it to the S-CSCF (Serving-Call Session Control Function). Furthermore, the IMS AS converts a data channel establishment request received from the DCSF into a SIP INVITE and sends it to the S-CSCF.

[0030] DCSF (Data Channel Signaling Function) is a network node 30 that has functions such as receiving event reports from IMS-AS and deciding whether or not to allow the provision of data channel services, managing bootstrap data channels, and HTTP web server functionality.

[0031] The Media Function (MF) is a network node 30 in the IMS network that has functions such as media resource management and data channel media traffic forwarding. The MF also processes media between the Data Channel Application Server (DCAS), which is the communication termination point, and the destination termination point based on configuration information received from the Data Channel Application Server (DCSF). The MF may also be called the Data Channel Media Function (DCMF). The MF may also be called the Multimedia Resource Function (MRF).

[0032] DCAS (Data Channel Application Server) is a network node 30 that has functions such as being a communication termination point for media and signaling in the IMS network.

[0033] Figure 4 shows an example of NTN (1). NTN (Non-Terrestrial Network) uses non-terrestrial equipment such as satellites to provide services to areas that cannot be covered by terrestrial 5G networks, mainly due to cost constraints. Furthermore, NTN can provide more reliable services. For example, it is envisioned to be applied to IoT (Inter-of-Things), ships, buses, trains, and critical communications. NTN also has scalability through efficient multicast or broadcast.

[0034] As an example from NTN, as shown in Figure 4, satellite 10A can retransmit signals from ground base station 10B to provide service to areas where ground base stations are not located, such as mountainous regions. In this example, the base station is deployed on the ground, but a configuration in which the base station is deployed on a satellite is also being considered.

[0035] Furthermore, the terrestrial 5G network may have the configuration described below. The terrestrial 5G network includes one or more base stations 10 and terminals 20. The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminals 20. A configuration in which the base station 10 is deployed on a satellite is also being considered.

[0036] Terminal 20 is a communication device equipped with wireless communication capabilities, such as a smartphone, mobile phone, tablet, wearable device, or M2M (Machine-to-Machine) communication module. Terminal 20 receives control signals or data from base station 10 via DL and transmits control signals or data to base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system.

[0037] Figure 5 shows an example (2) of NTN. The area per cell or beam in NTN is very large compared to terrestrial networks (TN). The connection between satellite 10A and NTN gateway 10B is called a feeder link, and the connection between satellite 10A and UE20 is called a service link.

[0038] As shown in Figure 5, the delay difference between the near-side UE20A and the far-side UE20B is, for example, 10.3 ms for GEO (Geosynchronous orbit) and 3.2 ms for LEO (Low Earth orbit). The beam size in NTN is, for example, 3500 km for GEO and 1000 km for LEO.

[0039] Figure 6 shows an example of NTN (3). As shown in Figure 6, NTN is realized by a satellite in space or an aircraft in the air. For example, a GEO satellite may be located at an altitude of 35,786 km and have a geostationary orbit. For example, a LEO satellite may be located at an altitude of 500-2000 km and orbit with a period of 88-127 minutes. For example, a HAPS (High Altitude Platform Station) may be located at an altitude of 8-50 km and perform a circular flight.

[0040] As shown in Figure 6, GEO satellites, LEO satellites, and HAPS aircraft may be connected to ground stations (gNBs) via gateways. While base stations are deployed on the ground here, configurations where base stations are deployed on satellites are also conceivable. In that case, equipment including base stations deployed on satellites may be connected to ground-based network nodes via gateways. Furthermore, the service area may increase in the order of HAPS, LEO, and GEO.

[0041] For example, NTN can extend the coverage of a 5G network to areas that are not yet served or are already served. Also, for example, NTN can improve the continuity, availability, and reliability of services in ships, buses, trains, or other critical communications. The fact that it is NTN may be indicated by the transmission of a specific parameter to terminal 20.

[0042] (Examples) This document describes the procedure for using a timer with appropriate settings in voice communication using a radio communication system with geostationary satellites.

[0043] In the existing specifications, for NB IoT (Internet of Things), terminals and AMFs use a NAS MM timer that is the normal NAS (Non-Access Stratum) MM (Mobility Management) timer value plus 240 seconds (see Section 4.17 of Non-Patent Document 4). Also, terminals and SMFs use a NAS SM timer that is the normal NAS SM (Session Management) timer value plus 180 seconds (see Section 4.18 of Non-Patent Document 4).

[0044] The following outlines the procedure. The terminal will use an existing NAS timer for a satellite base station (NG-RAN cell).

[0045] The terminal sends a registration request to the AMF that includes information indicating that the terminal is configured to be voice-service-centric (UE's usage setting=voice centric).

[0046] When AMF receives the registration request from a base station for NB IoT (Internet of Things), it uses the timer value for the satellite NG-RAN cell instead of the normal NAS MM timer value plus 240 seconds. AMF also sends a message to SMF requesting the configuration of a PDU session, which includes information (GeoVoiceNasSmTimerInd) requesting the use of the timer value defined for communication via geostationary satellites.

[0047] When SMF receives the aforementioned message from AMF, it uses the timer value for the satellite NG-RAN cell instead of the normal NAS SM timer value plus 180 seconds.

[0048] The details of this procedure will be explained below using sequence diagrams. Requests, responses, and notifications sent and received in the following procedures may be referred to as messages (e.g., request messages). Figure 7 shows an example of a first sequence diagram in an embodiment of the present invention. In this sequence diagram, the procedure for initial terminal registration is executed. For the procedure for initial terminal registration in existing specifications, refer to Non-Patent Documents 1, 5, and 6. The processing of each step will be explained below.

[0049] S100: Terminal 20 recognizes that it is located (camped) at a base station providing NB IoT wireless access via geostationary satellites, recognizes that its own terminal is configured to be voice-centric (UE's usage setting = voice centric), and sets the timer values ​​for message exchange between the terminal and AMF30A, and between the terminal and SMF30B, to the values ​​defined for communication via geostationary satellites.

[0050] S101: Terminal 20 sends a request message (RRCSetupRequest) to base station 10 requesting RRC configuration.

[0051] S102: The base station 10 sends a response message (RRCSetup) to the terminal 20 for the request message received in S101.

[0052] S103: Terminal 20 sends a message (RRCSetupComplete) to base station 10 notifying it that the RRC setup is complete. This message includes information indicating the terminal's initial registration request and is written as, for example, RRCSetupComplete (dedicatedNAS-Message(Registration request)).

[0053] S104: Base station 10 sends an Initial UE message to AMF30A containing information indicating the terminal's initial registration request received in S103. This message is, for example, written as Initial UE message (NAS-PDU (Registration request)).

[0054] S105:AMF30A sends a request message (Nausf_UEAuthentication_Authenticate request) to AUSF30B requesting the start of the terminal authentication procedure.

[0055] S106: AUSF30B sends a request message (Nudm_UEAuthentication_Get request) to UDM30C requesting authentication information. S107: UDM30C sends a response message (Nudm_UEAuthentication_Get response) to AUSF30B for the request message received in S106.

[0056] S108: AUSF30B sends a response message (Nausf_UEAuthentication_Authenticate response) to AMF30A for the request message received in S105.

[0057] S109: The AMF30A sends a message (Downlink NAS Transport) containing information indicating an authentication request to base station 10. This message is, for example, written as Downlink NAS Transport (NAS-PDU (Authentication request)).

[0058] S110: The base station 10 sends a message (DLInformationTransfer) containing information indicating an authentication request to the terminal 20. This message is written as, for example, DLInformationTransfer(dedicatedNAS-Message(Authentication request)).

[0059] S111: Terminal 20 sends a message (ULInformationTransfer) to base station 10 containing information indicating a response to the authentication request. This message is, for example, written as ULInformationTransfer(dedicatedNAS-Message(Authentication response)).

[0060] S112: Base station 10 sends a message (Uplink NAS Transport) to AMF30A containing information indicating a response to the authentication request. This message is, for example, denoted as Uplink NAS Transport (dedicatedNAS-Message (Authentication response)).

[0061] S113:AMF30A sends a message (Nausf_UEAuthentication_Authenticate request) to AUSF30B that notifies it of the information necessary to perform authentication.

[0062] S114: AUSF30B sends a response message (Nausf_UEAuthentication_Authenticate response) to AMF30A for the message received in S113.

[0063] S115: AUSF30B sends a message (Nudm_UEAuthentication_ResultConfirmation request) to UDM30C to notify it of the authentication result.

[0064] S116: UDM30C sends a response message (Nudm_UEAuthentication_ResultConfirmation response) to AUSF30B for the message received in S115.

[0065] S117: The AMF30A sends an Initial Context Setup request to base station 10.

[0066] S118: Base station 10 sends a SecurityModeCommand to terminal 20.

[0067] S119: Terminal 20 sends SecurityModeComplete to base station 10.

[0068] S120: Base station 10 sends an Initial Context Setup response to AMF30A.

[0069] S121:AMF30A sends a Downlink NAS Transport to base station 10. This message includes a Security Mode Command and is written as, for example, Downlink NAS Transport (NAS-PDU (Security Mode Command)).

[0070] S122: Base station 10 sends DLInformationTransfer to terminal 20. This message includes a Security Mode Command and is written as, for example, DLInformationTransfer(dedicatedNAS-Message(Security Mode Command)).

[0071] The process following S122 will now be described. Figure 8 is a diagram showing an example of a second sequence diagram in an embodiment of the present invention. The process of each step will be described below.

[0072] S123: Terminal 20 sends a registration request message (ULInformationTransfer) to base station 10 that includes information indicating that its device is configured to be voice-service centric (UE's usage setting=voice centric). This request message is written as, for example, ULInformationTransfer(dedicatedNAS-Message(Security Mode Complete(NAS message container(Registration request(UE's usage setting=voice centric))))).

[0073] S124: Base station 10 sends a registration request message (Uplink NAS Transport) to AMF30A, which includes the information received in S123 indicating that terminal 20 is configured to be voice service-centric (UE's usage setting=voice centric). This request message is written as, for example, Uplink NAS Transport(dedicatedNAS-Message(Security Mode Complete(NAS message container(Registration request(UE's usage setting=voice centric))))).

[0074] S125: Based on the transport information that transmitted the registration request message received in S123, the AMF30A recognizes that a base station (nb-IoT-GEO) providing NB IoT radio access via geostationary satellites will accommodate the terminal.

[0075] S126: The AMF30A recognizes that, under nb-IoT-GEO, its device and network are capable of providing voice communication.

[0076] S127:AMF30A sets the NAS MM timer to a value for geostationary satellites based on the information (UE's usage setting) indicating that nb-IoT-GEO accommodates the terminal and that terminal 20 is configured to be voice service-centric.

[0077] S128:AMF30A decides to set the information indicating support for 5G system network functionality (5GS network feature support) to include information indicating support for IMS voice communication over packet-switched sessions via 3GPP access (IMS voice over PS session over 3GPP access indicator).

[0078] S129: The AMF30A sends a message (Downlink NAS Transport) to base station 10 requesting the identity of terminal 20. This message is written as, for example, Downlink NAS Transport (NAS-PDU (Identity request)).

[0079] S130: Terminal 20 sends a message (DLInformationTransfer) to base station 10 requesting the identity of terminal 20. This message is written as, for example, DLInformationTransfer(NAS-PDU(Identity request)).

[0080] S131: Terminal 20 sends a message (ULInformationTransfer) to base station 10 in response to the request received in S130. This request message is, for example, written as ULInformationTransfer(NAS-PDU(Identity response)).

[0081] S132: Base station 10 sends a message (Uplink NAS Transport) to AMF30A in response to the request received in S129. This request message is, for example, written as Uplink NAS Transport (NAS-PDU (Identity response)).

[0082] S133:AMF30A sends a message (N5g-eir_EquipmentIdentityCheck_Get request) to EIR (Equipment Identity Register)30D requesting verification of the identity of terminal 20.

[0083] S134: EIR30D sends a message to AMF30A in response to the request received in S133 (N5g-eir_EquipmentIdentityCheck_Get response).

[0084] S135:AMF30A sends a message to UDM30C requesting registration of the terminal context (Nudm_UECM_Registration request).

[0085] S136: UDM30C sends a message to AMF30A in response to the request received in S135 (Nudm_UECM_Registration response).

[0086] S137:AMF30A sends a message (Nudm_SDM_Get request) to UDM30C requesting subscriber information.

[0087] S138: UDM30C sends a message to AMF30A in response to the request received in S137 (Nudm_SDM_Get response).

[0088] S139: The AMF30A sends a message (Downlink NAS Transport) to base station 10 in response to the registration request received in S124. This message includes information indicating support for the 5G system network (5GS network feature support) and information indicating support for IMS voice communication over a packet-switched session via 3GPP access (IMS voice over PS session over 3GPP access indicator). This message is also written as, for example, Downlink NAS Transport(NAS-PDU(Registration accept(5GS network feature support(IMS voice over PS session supported over 3GPP access))).

[0089] S140: Base station 10 sends a message (DLInformationTransfer) to terminal 20 in response to the registration request received in S123. This message includes information indicating support for the 5G system network function (5GS network feature support) and information indicating support for IMS voice communication over a packet-switched session via 3GPP access (IMS voice over PS session over 3GPP access indicator). This message is also written as, for example, DLInformationTransfer(dedicatedNAS-Message(Registration accept(5GS network feature support(IMS voice over PS session supported over 3GPP access)))).

[0090] Next, the procedure for establishing a PDU session will be described. Figure 9 shows an example of a third sequence diagram in an embodiment of the present invention. For the procedure for establishing a PDU session in existing specifications, refer to Non-Patent Documents 1, 5, and 6. The processing of each step will be described below.

[0091] S201: Terminal 20 sends a message (ULInformationTransfer) to base station 10 requesting the establishment / configuration of a PDU session. This message is written as, for example, ULInformationTransfer(dedicatedNAS-Message(UL NAS transport(Payload container type(N1 SM information), Payload container(PDU Session Establishment request), DNN=ims))).

[0092] S202: Base station 10 sends a message (Uplink NAS Transport) to AMF30A requesting the establishment / configuration of a PDU session. This message is written as, for example, Uplink NAS Transport(NAS-PDU(UL NAS transport(Payload container type(N1 SM information), Payload container(PDU Session Establishment request), DNN=ims))).

[0093] S203:AMF30A recognizes that since the NAS MM timer is set to a value for geostationary satellites, the NAS SM timer should also be set to a value for geostationary satellites.

[0094] S204:AMF30A sends a request message (Nsmf_PDUSession_CreateSMContext request) to SMF30E requesting the establishment / configuration of a PDU session. This request message includes information (GeoVoiceNasSmTimerInd=true) requesting that the timer value in the message exchange between terminal 20 and SMF30E be set to the value defined for communication over geostationary satellites. This request message is also written as, for example, Nsmf_PDUSession_CreateSMContext request (SmContextCreateData (GeoVoiceNasSmTimerInd=true)).

[0095] S205:SMF30E sets the timer value for message exchange between the terminal and the device to the value defined for communication via geostationary satellite.

[0096] S206: SMF30E sends a response message (Nsmf_PDUSession_CreateSMContext response) to AMF30A for the request message received in S204.

[0097] S207:SMF30E sends a request message (Npcf_SMPolicyControl_Create request) to PCF30G requesting that it determine and transmit the policy for the PDU session.

[0098] S208: PCF30G sends a response message (Npcf_SMPolicyControl_Create response) to SMF30E for the request message received in S207.

[0099] S209: SMF30E sends a request message (PFCP Session Establishment request) to UPF30F for the establishment of a user data transfer path.

[0100] S210:UPF30F sends a response message (PFCP Session Establishment response) to SMF30E for the request message received in S209.

[0101] S211: SMF30E sends a message to AMF30A (Namf_Communication_N1N2MessageTransfer request) containing information indicating acceptance of the PDU session establishment request.

[0102] S212: AMF30A sends a response message (Namf_Communication_N1N2MessageTransfer response) to SMF30E for the request message received in S211.

[0103] S213: The AMF30A sends a request message to the base station 10 requesting the setup of a PDU session resource (PDU Session Resource Setup request). This message includes information indicating acceptance of the PDU session establishment requested in S202.

[0104] S214: The base station 10 sends an RRC configuration message (RRCReconfiguration) to the terminal 20, which includes information indicating acceptance of the PDU session establishment requested in S201.

[0105] S215: Terminal 20 sends a message to base station 10 indicating that the RRC configuration is complete (RRCReconfigurationComplete).

[0106] S216: Base station 10 sends a response message (PDU Session Resource Setup response) to AMF30A for the request message received in S213.

[0107] S217:AMF30A sends a request message (Nsmf_PDUSession_UpdateSMContext request) to SMF30E requesting a context update for the PDU session.

[0108] S218: SMF30E sends a response message (Nsmf_PDUSession_UpdateSMContext response) to AMF30A for the request message received in S217.

[0109] S219: SMF30E sends a request message (PFCP Session Modification request) to UPF30F for updating the user data transfer path.

[0110] S220:UPF30F sends a response message (PFCP Session Modification response) to SMF30E for the request message received in S219.

[0111] As described above, a timer with an appropriate set value can be used in voice communication using a wireless communication system with geostationary satellites.

[0112] (Device configuration) Next, we will describe an example of the functional configuration of the base station 10, network node 30, and terminal 20 that perform the processes and operations described above. The base station 10, network node 30, and terminal 20 include the functions to perform the embodiments described above. However, the base station 10, network node 30, and terminal 20 may each have only some of the functions in the embodiments.

[0113] <Base station 10 and network node 30> Figure 10 shows an example of the functional configuration of a base station 10 and a network node 30. As shown in Figure 10, 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 Figure 10 is merely an example. The functional classifications and names of the functional units can be anything as long as they can perform the operations according to the embodiment of the present invention. The network node 30 may have the same functional configuration as the base station 10. Furthermore, a network node 30 having multiple different functions on the system architecture may be composed of multiple network nodes 30 separated by function.

[0114] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 or other network node 30 and transmitting the signal by wire or wireless. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 or other network node 30 and obtaining information from the received signal, for example, higher layer information. A communication unit including the transmitting unit 110 and the receiving unit 120 may be configured.

[0115] The setting unit 130 stores pre-configured setting information and various setting information to be transmitted to the terminal 20 in a storage device, and reads them from the storage device as needed.

[0116] The control unit 140 performs the processes described in the embodiment. The control unit 140 also performs processing related to communication with the terminal 20. The signal transmission function of the control unit 140 may be included in the transmission unit 110, and the signal reception function of the control unit 140 may be included in the reception unit 120.

[0117] <Terminal 20> Figure 11 shows an example of the functional configuration of terminal 20. As shown in Figure 11, terminal 20 has a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in Figure 11 is merely an example. The functional classifications and names of the functional units can be anything as long as they can perform the operations according to the embodiment of the present invention. Furthermore, the communication device that becomes the resource holder 20 may have a functional configuration similar to that of terminal 20.

[0118] The transmitting unit 210 creates a transmission signal from the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains signals from higher layers from the received physical layer signals. The receiving unit 220 also has the function of receiving control signals or reference signals transmitted from the network node 30. A communication unit including the transmitting unit 210 and the receiving unit 220 may be configured.

[0119] The setting unit 230 stores various setting information received from the network node 30 by the receiving unit 220 in its storage device and reads it from the storage device as needed. The setting unit 230 also stores pre-configured setting information.

[0120] The control unit 240 performs the processing described in the embodiment. The signal transmission function in the control unit 240 may be included in the transmission unit 210, and the signal reception function in the control unit 240 may be included in the reception unit 220.

[0121] (Hardware configuration) The block diagrams (Figures 10 and 11) used in the description of the above embodiments show functional units. 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 it may be realized using two or more physically or logically separated devices that are directly or indirectly connected (for example, using wired or wireless connections). A functional block may be realized by combining the one or more devices with software.

[0122] Functions include, but are not limited to, judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, exploration, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, assumption, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating (mapping), and assigning. For example, a functional block (configuration part) that enables transmission is called a transmitting unit or transmitter. As mentioned above, the method of implementation is not particularly limited.

[0123] For example, the base station 10, network node 30, terminal 20, etc. in one embodiment of the present disclosure may function as a computer that processes the wireless communication method of the present disclosure. Figure 12 is a diagram showing an example of the hardware configuration of the base station 10, terminal 20, and network node 30 according to one embodiment of the present disclosure. The network node 30 may have a hardware configuration similar to that of the base station 10. The base station 10 and terminal 20 described above 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.

[0124] In the following explanation, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware configuration of the base station 10 and terminal 20 may include one or more of the devices shown in the figure, or it may be configured to omit some of the devices.

[0125] Each function in the base station 10 and terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001 and storage device 1002, which allows the processor 1001 to perform calculations, control communication by the communication device 1004, and control at least one of the reading and writing of data in the storage device 1002 and auxiliary storage device 1003.

[0126] The processor 1001 controls the entire computer, for example, by running an operating system. The processor 1001 may consist of a central processing unit (CPU) that includes interfaces with peripheral devices, control devices, arithmetic units, registers, etc. For example, the control unit 140, control unit 240, etc., described above may be implemented by the processor 1001.

[0127] Furthermore, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes accordingly. The program used is one that causes a computer to execute at least a part of the operations described in the above embodiment. For example, the control unit 140 of the base station 10 shown in Figure 10 may be implemented 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 Figure 11 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Although the above processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via a telecommunications line.

[0128] The storage device 1002 is a computer-readable recording medium and may consist of at least one of the following: ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. The storage device 1002 may also be called a register, cache, main memory, etc. The storage device 1002 can store executable programs (program code), software modules, etc., for implementing a communication method according to one embodiment of this disclosure.

[0129] The auxiliary storage device 1003 is a computer-readable recording medium and may consist of at least one of the following: an optical disc such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disc, a digital multipurpose disc, a Blu-ray® disc), a smart card, flash memory (e.g., a card, a stick, a key drive), a floppy® disk, a magnetic strip, etc. The above-mentioned storage medium may also be a database, server, or other suitable medium that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0130] The communication device 1004 is hardware (transceiver / receiver device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, network controller, network card, communication module, etc. The communication device 1004 may include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, the transmit / receive antenna, amplifier section, transmit / receive section, transmission path interface, etc., may be implemented by the communication device 1004. The transmit / receive section may be implemented with physically or logically separated transmitting and receiving sections.

[0131] The input device 1005 is an input device that accepts input from an external source (e.g., a keyboard, mouse, microphone, switch, button, sensor, etc.). The output device 1006 is an output device that outputs to an external source (e.g., a display, speaker, LED lamp, etc.). The input device 1005 and the output device 1006 may be configured as an integrated unit (e.g., a touch panel).

[0132] Furthermore, 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 different buses may be configured for each device.

[0133] Furthermore, the base station 10 and terminal 20 may be configured to 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), and some or all of each functional block may be realized by such hardware. For example, the processor 1001 may be implemented using at least one of these hardware components.

[0134] Figure 13 shows an example of the configuration of vehicle 2001. As shown in Figure 13, vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. Each aspect / embodiment described in this disclosure may be applied to a communication device mounted on vehicle 2001, for example, to the communication module 2013.

[0135] The drive unit 2002 consists of, for example, an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel, which is operated by the user.

[0136] The electronic control unit 2010 consists of a microprocessor 2031, memory (ROM, RAM) 2032, and communication ports (IO ports) 2033. Signals from various sensors 2021 to 2029 installed in the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0137] Signals from various sensors 2021-2029 include current signals from current sensor 2021 which senses motor current, front and rear wheel rotation speed signals obtained by rotation speed sensor 2022, front and rear wheel air pressure signals obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depression signals obtained by accelerator pedal sensor 2029, brake pedal depression signals obtained by brake pedal sensor 2026, shift lever operation signals obtained by shift lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0138] The Information Services Unit 2012 consists of various devices for providing (outputting) various types of information such as driving information, traffic information, and entertainment information, including a car navigation system, audio system, speakers, television, and radio, and one or more ECUs that control these devices. The Information Services Unit 2012 uses information acquired from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Services Unit 2012 may include input devices that accept input from the outside (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to the outside (e.g., display, speaker, LED lamp, touch panel, etc.).

[0139] The driver assistance system unit 2030 consists of various devices that provide functions to prevent accidents or reduce the driver's workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning locators (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps, etc.), gyro systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System), etc.), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. The driver assistance system unit 2030 also sends and receives various information via the communication module 2013 to realize driver assistance functions or autonomous driving functions.

[0140] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via its communication port. For example, the communication module 2013 sends and receives data via its communication port 2033 to the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, the microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021-29 provided in the vehicle 2001.

[0141] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 and can communicate with external devices. For example, it can send and receive various types of information to and from external devices via wireless communication. The communication module 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station or a mobile station.

[0142] The communication module 2013 may transmit at least one of the following to an external device via wireless communication: signals from the various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on said signals, and information based on input from an external source (user) obtained via the information service unit 2012. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc., may also be called input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above input.

[0143] The communication module 2013 receives various information (traffic information, signal information, inter-vehicle information, etc.) transmitted from an external device and displays it on the information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may also be called an output unit, which outputs information (for example, outputs information to devices such as displays and speakers based on the PDSCH (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from the external device in memory 2032, which is available to the microprocessor 2031. Based on the information stored in memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021-2029, etc., provided in the vehicle 2001.

[0144] <Note> The following supplementary information shows the correspondence between network nodes and components and the terms and steps described in the examples. The names of the network nodes are examples only and are not limiting. (Additional note 1) A receiving unit receives a registration request message from a terminal, which includes information indicating that the terminal is configured to be voice-service-centric (UE's usage setting = voice centric), from a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite, (S123-S124) A control unit sets the value of a timer related to message exchange between the terminal and the device to a value defined for communication via geostationary satellite, (S127) A network node (AMF30A) that has [this feature]. (Additional note 2) The receiving unit receives a message from the terminal requesting the establishment of a PDU (Packet Data Unit) session, (S201-S202) The system further includes a transmission unit that transmits a message to the first network node (SMF30E) requesting the establishment of a PDU session, which includes information (GeoVoiceNasSmTimerInd=true) requesting that the value of the timer for message exchange between the terminal and the first network node be set to a value defined for communication via geostationary satellites. The network node described in Appendix 1. (Additional note 3) The system recognizes that it is located near a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via geostationary satellites (S101), and recognizes that its terminal is configured to be voice-centric (UE's usage setting = voice centric) (S101). A control unit sets the timer values ​​for message exchange between the terminal and the first network node (AMF30A), and between the terminal and the second network node (SMF30E), to values ​​defined for communication via geostationary satellites, (S101) A transmission unit that sends a registration request message to the first network node, containing information indicating that the device is configured to be voice-service centric (UE's usage setting=voice centric), and a message requesting the configuration of a PDU (Packet Data Unit) session, (S123-S124) A terminal. (Additional note 4) The receiving unit receives a message from the first network node (AMF30A) requesting the establishment of a PDU (Packet Data Unit) session, which includes information (GeoVoiceNasSmTimerInd=true) requesting that the timer value for message exchange between the terminal and the device be set to the value defined for communication via geostationary satellite, (S204) A control unit sets the timer value for message exchange between the terminal and the device to a value defined for communication via geostationary satellite, (S205) A network node (SMF30E) that has [this feature]. (Additional note 5) The steps include receiving a registration request message from a terminal, which includes information indicating that the terminal is configured primarily for voice services, from a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite, The steps include setting the timer value for message exchange between the terminal and the device to a value defined for communication via geostationary satellite, A communication method performed by network nodes having [a certain feature / ability].

[0145] In any of the provisions of Appendix 1 to Appendix 5, a timer with an appropriate set value can be used in voice communication using a radio communication system with geostationary satellites.

[0146] (Supplement to the embodiment) While embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, substitutions, etc. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these 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 combined as needed, and matters described in one item may be applied to matters described in another item (as long as they do not contradict each other). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical parts. The operation of multiple functional units may be physically performed by one part, or the operation of one functional unit may be physically performed by multiple parts. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as it does not contradict each other. For the convenience of explaining the processing, the base station 10 and terminal 20 have been described using functional block diagrams, but such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to an embodiment of the present invention and the software operated by the processor of the terminal 20 according to an embodiment of the present invention may be stored in 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.

[0147] Furthermore, the notification of information is not limited to the embodiments / models described herein and may be carried out by other methods. For example, the notification of information may be carried out by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Also, RRC signaling may be called RRC messages, and may be, for example, RRC Connection Setup messages, RRC Connection Reconfiguration messages, etc.

[0148] Each aspect / embodiment described in this disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (where x is, for example, an integer or decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), 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)), and IEEE This may apply to at least one system utilizing 802.20, UWB (Ultra-WideBand), Bluetooth®, or other appropriate systems, and to next-generation systems extended, modified, created, or defined based thereon. It may also apply to a combination of multiple systems (for example, a combination of at least one of LTE and LTE-A with 5G).

[0149] The processing procedures, sequences, flowcharts, etc., of each aspect / embodiment described herein may be reordered, provided they are consistent with each other. For example, the methods described herein present various step elements in an exemplary order and are not limited to that specific order.

[0150] In this specification, specific operations performed by the base station 10 may, in some cases, be performed by its upper node. In a network consisting of one or more network nodes having a base station 10, it is clear that various operations performed for communication with the terminal 20 can be performed by the base station 10 and at least one of the other network nodes (for example, an MME or S-GW, but not limited to these). Although the above example illustrates the case where there is one other network node besides the base station 10, the other network node may be a combination of multiple other network nodes (for example, an MME and an S-GW).

[0151] The information or signals described in this disclosure may be output from a higher layer (or lower layer) to a lower layer (or higher layer). They may also be input and output via multiple network nodes.

[0152] Input and output information may be stored in a specific location (e.g., memory) or managed using a management table. Input and output information may be overwritten, updated, or appended to. Output information may be deleted. Input information may be transmitted to other devices.

[0153] The determination in this disclosure may be made by a value represented by one bit (0 or 1), by a boolean value (true or false), or by a numerical comparison (for example, a comparison with a predetermined value).

[0154] Software should be broadly interpreted to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, and so on, whether they are called software, firmware, middleware, microcode, hardware description languages, or by any other name.

[0155] Furthermore, software, instructions, information, etc., may be transmitted and received via a transmission medium. For example, if software is transmitted from a website, server, or other remote source using at least one of wired technology (such as coaxial cable, fiber optic cable, twisted pair, or digital subscriber line (DSL)) and wireless technology (such as infrared or microwave), then at least one of these wired and wireless technologies is included in the definition of a transmission medium.

[0156] The information, signals, etc. described in this disclosure may be represented using any of the various different techniques. 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 voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any combination thereof.

[0157] In addition, terms used in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and symbol may be a signal (signaling). Also, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, cell, frequency carrier, etc.

[0158] The terms “system” and “network” as used in this disclosure are interchangeable.

[0159] Furthermore, the information, parameters, etc., described in this disclosure may be expressed using absolute values, relative values ​​from a given value, or other corresponding information. For example, wireless resources may be indicated by an index.

[0160] The names used for the parameters described above are not restrictive in any way. Furthermore, the formulas and other expressions using these parameters may differ from those expressly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, and therefore, the various names assigned to these various channels and information elements are not restrictive in any way.

[0161] In this disclosure, terms such as "base station (BS)", "wireless base station", "base station equipment", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0162] A base station can house one or more (e.g., three) cells. If a base station houses multiple cells, the entire coverage area of ​​the base station can be divided into several smaller areas, each of which may also be provided with communication services by a base station subsystem (e.g., a Remote Radio Head (RRH)). The terms “cell” or “sector” refer to part or all of the coverage area of ​​at least one of the base station and / or base station subsystems that provide communication services in that coverage.

[0163] In this disclosure, the transmission of information by a base station to a terminal may be interpreted as the base station instructing the terminal to perform information-based control or operation.

[0164] In this disclosure, terms such as "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" may be used interchangeably.

[0165] 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 several other appropriate terms.

[0166] 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 also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object, and its speed of movement is arbitrary. This also includes the case when the mobile body is stationary. The mobile body includes, but is not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, handcarts, rickshaws, ships and other watercraft, airplanes, rockets, satellites, drones (registered trademark), multicopters, quadcopters, balloons, and items mounted on them. The mobile body may also be a mobile body that moves autonomously based on operation commands. It may be a vehicle (e.g., a car, an airplane, etc.), an unmanned mobile body (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). Furthermore, at least one of the base station and the mobile station may include devices that do not necessarily move during communication operations. 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.

[0167] Furthermore, the term "base station" in this disclosure may be interpreted as "user terminal." For example, the various aspects / embodiments of this disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between multiple terminals 20 (which may be called, for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.). In this case, the terminals 20 may have the functions that the base station 10 has. Also, terms such as "uplink" and "downlink" may be interpreted as terms corresponding to terminal-to-terminal communication (for example, "side"). For example, uplink channel, downlink channel, etc., may be interpreted as side channel.

[0168] Similarly, the term "user terminal" in this disclosure may be replaced with "base station." In this case, the base station may be configured to have the same functions as the user terminal described above.

[0169] As used in this disclosure, the terms “determining” and “determining” may encompass a wide variety of actions. “Determining” may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry (e.g., searching in a table, database, or other data structure), and ascertaining. “Determining” may also include, for example, receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, and accessing (e.g., accessing data in memory). Furthermore, "judgment" and "decision" can include considering something as having been "judged" or "decided" after resolving, selecting, choosing, establishing, comparing, etc. In other words, "judgment" and "decision" can include considering something as having been "judged" or "decided" after some action. Also, "judgment (decision)" can be reinterpreted as "assuming," "expecting," or "considering."

[0170] The terms “connected,” “coupled,” or any variation thereof, mean 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” with each other. The coupling or connection between elements may be physical, logical, or a combination thereof. For example, “connection” may be reinterpreted as “access.” As used in this disclosure, two elements may be considered to be “connected” or “coupled” with each other using at least one of one or more wires, cables, and printed electrical connections, and, in some non-limiting and non-exclusive examples, electromagnetic energy having wavelengths in the radio frequency domain, microwave domain, and optical (both visible and invisible) domain.

[0171] The reference signal can also be abbreviated as RS (Reference Signal), and may be called a pilot depending on the applicable standard.

[0172] In this disclosure, the phrase "based on" does not mean "based solely on" unless otherwise specified. In other words, the phrase "based on" means both "based solely on" and "based at least on."

[0173] Any reference to elements using designations such as “first,” “second,” etc., as 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 way to distinguish between two or more elements. Accordingly, references to the first and second elements do not imply that only two elements may be employed, or that the first element must precede the second element in any way.

[0174] In the configuration of each of the above devices, "means" may be replaced with "part," "circuit," "device," etc.

[0175] Where the terms “include,” “including,” and variations thereof are used in this disclosure, these terms are intended to be inclusive, as is the term “comprising.” Furthermore, the term “or” as used in this disclosure is not intended to mean exclusive OR.

[0176] In this disclosure, if articles are added through translation, such as a, an, and the in English, this disclosure may include the fact that the noun following these articles is plural.

[0177] In this 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 "combine" may be interpreted similarly to "different."

[0178] Each aspect / embodiment described herein may be used individually, in combination, or switched between as needed during implementation. Furthermore, notification of specific information (e.g., notification that "X is") is not limited to explicit notification, but may also be implicit (e.g., by not providing such notification).

[0179] Although the present disclosure has been described in detail above, it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the intent and scope of the present disclosure as defined by the claims. Therefore, the descriptions in the present disclosure are illustrative and not intended to be restrictive in any way. [Explanation of symbols]

[0180] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 devices 210 Transmitter 220 Receiver 230 Setting section 240 Control Unit 30 network nodes 1001 Processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication device 1005 Input device 1006 Output device 2001 Vehicle 2002 Drive Unit 2003 Steering Department 2004 Accelerator pedal 2005 Brake pedal 2006 Shift Lever 2007 Front Wheel 2008 Rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 Rotation speed sensor 2023 Pneumatic Sensor 2024 Vehicle Speed ​​Sensor 2025 Accelerometer 2026 Brake Pedal Sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driver Support Systems Department 2031 Microprocessor 2032 memory (ROM, RAM) 2033 Communication port (I / O port)

Claims

1. A receiving unit that receives a registration request message from a terminal, which includes information indicating that the terminal is configured primarily for voice services, from a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite. A control unit sets the value of a timer related to message exchange between the terminal and the device to a value defined for communication via geostationary satellite. A network node that has

2. The receiving unit receives a message from the terminal requesting the establishment of a PDU (Packet Data Unit) session. The first network node further includes a transmitting unit that transmits a message requesting the establishment of a PDU session, which includes information requesting that the value of a timer for message exchange between the terminal and the first network node be set to a value defined for communication via geostationary satellite. The network node according to claim 1.

3. It recognizes that it is located near a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via geostationary satellites. A control unit recognizes that its own terminal is configured primarily for voice services and sets the timer values ​​for message exchange between the terminal and the first network node, and between the terminal and the second network node, to values ​​defined for communication via geostationary satellites. A transmitting unit that sends a registration request message to the first network node, containing information indicating that the device is configured primarily for voice services, and a message requesting the configuration of a PDU (Packet Data Unit) session. A terminal.

4. A receiving unit receives a message from the first network node requesting the establishment of a PDU (Packet Data Unit) session, which includes information requesting that the timer value for message exchange between the terminal and the device be set to a value defined for communication via geostationary satellite. A control unit sets the timer value for message exchange between the terminal and the device to a value defined for communication via geostationary satellites, A network node that has

5. The steps include receiving a registration request message from a terminal, which includes information indicating that the terminal is configured primarily for voice services, from a base station providing NB (Narrow Band) IoT (Internet of Things) wireless access via a geostationary satellite, The steps include setting the timer value for message exchange between the terminal and the device to a value defined for communication via geostationary satellite, A communication method performed by network nodes having [a certain feature / ability].

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