KR20220103576A - Apparatus and method for supporting communication with satellite - Google Patents

Abstract

The present disclosure provides a method for supporting communication using an artificial satellite in a wireless communication system. The method comprises the steps of: transmitting, by a terminal, a registration request message to an access and mobility management function (AMF); and receiving, by the terminal, a registration acceptance message or a registration rejection message from the AMF. According to the present invention, the registration request message includes information on whether the terminal supports a satellite radio access network (RAN), and the registration response message includes information on a timer value related to the transmission of a registration message and a RAT type for the terminal to access the satellite RAN.

Description

Apparatus and method for supporting communication with satellite in a wireless communication system

The present disclosure relates to a method and apparatus for supporting communication using a satellite in a wireless communication system. The present disclosure also relates to a method and apparatus for supporting security when artificial satellites are introduced into a wireless communication system. The present disclosure also relates to an apparatus and method for supporting an emergency call when artificial satellites are introduced into a wireless communication system.

Efforts are being made to develop an improved 5G communication system or pre-5G communication system in order to meet the increasing demand for wireless data traffic after commercialization of the 4G communication system. For this reason, the 5G communication system or the pre-5G communication system is called a system after the 4G network (Beyond 4G Network) communication system or the LTE system after (Post LTE). The 5G communication system defined by 3GPP is called the New Radio (NR) system. In order to achieve a high data rate, the 5G communication system is being considered for implementation in a very high frequency (mmWave) band (eg, such as a 60 gigabyte (60 GHz) band). In order to alleviate the path loss of radio waves and increase the propagation distance of radio waves in the very high frequency band, in the 5G communication system, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) are used. ), array antenna, analog beam-forming, and large scale antenna techniques have been discussed and applied to the NR system. In addition, for network improvement of the system, in the 5G communication system, an evolved small cell, an advanced small cell, a cloud radio access network (cloud radio access network: cloud RAN), an ultra-dense network (ultra-dense network) , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation Technology development is underway. In addition, in the 5G system, the advanced coding modulation (ACM) methods FQAM (Hybrid FSK and QAM Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technologies FBMC (Filter Bank Multi Carrier), NOMA (non-orthogonal multiple access), and sparse code multiple access (SCMA) are being developed.

On the other hand, the Internet is evolving from a human-centered connection network where humans create and consume information to an Internet of Things (IoT) network that exchanges and processes information between distributed components such as objects. Internet of Everything (IoE) technology, which combines big data processing technology through connection with cloud servers, etc. with IoT technology, is also emerging. In order to implement IoT, technology elements such as sensing technology, wired and wireless communication and network infrastructure, service interface technology, and security technology are required. , M2M), and MTC (Machine Type Communication) are being studied. In the IoT environment, an intelligent IT (Internet Technology) service that collects and analyzes data generated from connected objects and creates new values in human life can be provided. IoT is the field of smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart home appliance, advanced medical service, etc. can be applied to

Accordingly, various attempts are being made to apply the 5G communication system to the IoT network. For example, 5G communication such as sensor network, machine to machine (M2M), and machine type communication (MTC) is being implemented by techniques such as beamforming, MIMO, and array antenna. The application of a cloud radio access network (cloud RAN) as the big data processing technology described above is an example of the convergence of 5G technology and IoT technology.

As various services can be provided according to the above-mentioned and the development of mobile communication systems, a method for effectively providing these services is required, and in particular, a method for supporting communication in various environments or protecting user data is required. is becoming

The disclosed embodiments are intended to provide a method and apparatus for supporting communication using artificial satellites in a wireless communication system. In addition, the disclosed embodiment intends to provide a method and apparatus for supporting security when artificial satellites are introduced into a wireless communication system. In addition, the disclosed embodiment is to provide an apparatus and method for supporting an emergency call (emergency call) when the artificial satellite is introduced into a communication system.

According to an embodiment of the present disclosure, a method for supporting communication using an artificial satellite in a wireless communication system includes: transmitting, by a terminal, a registration request message to an Access and Mobility Management Function (AMF); and receiving, by the terminal, a registration acceptance message or a registration rejection message from the AMF, wherein the registration request message includes information on whether the terminal supports an artificial satellite RAN (Radio Access Network) As a feature, the registration response message may include information in a RAT type for the UE to access the satellite RAN and a timer value related to transmission of the registration message.

According to an embodiment of the present disclosure, communication may be supported by using an artificial satellite in a wireless communication system.

In addition, according to an embodiment of the present disclosure, security can be supported when artificial satellites are introduced into a communication system.

In addition, according to an embodiment of the present disclosure, it is possible to support an emergency call (emergency call) when the artificial satellite is introduced into the communication system.

1A illustrates a first embodiment of a terminal and a network environment for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
1B illustrates a second embodiment of a terminal and a network environment for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
2 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellites according to an embodiment of the present disclosure.
3 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
4 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
5 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
6 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
7 is a diagram illustrating the configuration of a terminal according to an embodiment of the present disclosure.
8 is a diagram illustrating a configuration of a network entity according to an embodiment of the present disclosure.
9 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
10 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
11 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
12 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
13 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
14 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
15 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.
16 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In describing the embodiments, descriptions of technical contents that are well known in the technical field to which the present disclosure pertains and are not directly related to the present disclosure will be omitted. This is to more clearly convey the gist of the present disclosure without obscuring the gist of the present disclosure by omitting unnecessary description.

For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings. In addition, the size of each component does not fully reflect the actual size. In each figure, the same or corresponding elements are assigned the same reference numbers.

Advantages and features of the present disclosure and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present disclosure is not limited to the embodiments disclosed below and may be implemented in various different forms, and only the present embodiments make the disclosure of the present disclosure complete, and common knowledge in the art to which the present disclosure belongs It is provided to fully inform those who have the scope of the invention, and the present disclosure is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

At this time, it will be understood that each block of the flowchart diagrams and combinations of the flowchart diagrams may be performed by computer program instructions.

These computer program instructions may be embodied in a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, such that the instructions performed by the processor of the computer or other programmable data processing equipment are not described in the flowchart block(s). It creates a means to perform functions. These computer program instructions may also be stored in a computer-usable or computer-readable memory that may direct a computer or other programmable data processing equipment to implement a function in a particular manner, and thus the computer-usable or computer-readable memory. It is also possible for the instructions stored in the flowchart block(s) to produce an article of manufacture containing instruction means for performing the function described in the flowchart block(s). The computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operational steps are performed on the computer or other programmable data processing equipment to create a computer-executed process to create a computer or other programmable data processing equipment. It is also possible that instructions for performing the processing equipment provide steps for performing the functions described in the flowchart block(s).

Additionally, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s). It should also be noted that in some alternative implementations it is also possible for the functions recited in the blocks to occur out of order. For example, it is possible that two blocks shown in succession are actually performed substantially simultaneously, or that the blocks are sometimes performed in the reverse order according to the corresponding function.

At this time, the term '~ unit' used in this embodiment means software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and '~ unit' performs certain roles do. However, '-part' is not limited to software or hardware. '~unit' may be configured to reside on an addressable storage medium or may be configured to refresh one or more processors. Thus, as an example, '~' denotes components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, and procedures. , subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and '~ units' may be combined into a smaller number of components and '~ units' or further separated into additional components and '~ units'. In addition, components and '~ units' may be implemented to play one or more CPUs in a device or secure multimedia card. Also, in an embodiment, '~ unit' may include one or more processors.

A term for identifying an access node used in the following description, a term referring to network entities, a term referring to messages, a term referring to an interface between network objects, a term referring to various identification information and the like are exemplified for convenience of description. Accordingly, the present disclosure is not limited to the terms described below, and other terms referring to objects having equivalent technical meanings may be used.

For convenience of description, the present disclosure uses terms and names defined in the 3GPP LTE (3rd Generation Partnership Project Long Term Evolution) standard, or terms and names modified based on the terms and names. However, the present disclosure is not limited by the above-described terms and names, and may be equally applied to systems conforming to other standards. In the present disclosure, eNB may be used interchangeably with gNB for convenience of description. That is, a base station described as an eNB may represent a gNB. In the present disclosure, the term terminal may refer to a mobile phone, NB-IoT devices, sensors, as well as various wireless communication devices.

That is, in describing the embodiments of the present disclosure in detail, the 3GPP will mainly focus on the communication standard set by the standard, but the main gist of the present disclosure is to greatly extend the scope of the present disclosure to other communication systems having a similar technical background. It can be applied with some modifications within the scope not departing from, and this will be possible at the judgment of a person skilled in the art of the present disclosure.

1A and 1B illustrate a first embodiment of a terminal and a network environment for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

Referring to Figure 1a, 5G or NR core network (core network) is UPF (User Plane Function, 131), SMF (Session Management Function, 121), AMF (Access and Mobility Management Function, 111), 5G RAN (Radio Access) Network, 103), UDM (User Data Management, 151), PCF (Policy Control Function, 161), such as network functions (NF, Network Function) may be configured. In addition, for authentication of these entities, entities such as AUSF (Authentication Server Function, 141) and AAA (authentication, authorization and accounting, 171) may be included.

User Equipment (UE) (or Terminal 101) may access the 5G core network through a base station (5G RAN, Radio Access Network, basestation, BS, 103). Meanwhile, the UE communicates through non 3GPP access. For the case of N3IWF (N3 interworking function) exists, and if through non3GPP access, session management is controlled in UE, non 3GPP access, N3IWF, SMF, and mobility management is UE, non 3GPP access, N3IWF, AMF can be controlled through

In the 5G or NR system, entities performing mobility management and session management are separated into an AMF 111 and an SMF 121 . On the other hand, in the 5G or NR system, a stand alone deployment structure in which communication is performed only with 5G or NR entities and a non stand alone deployment structure in which a 4G entity and 5G or NR entities are used together are being considered.

As shown in FIG. 1A , when the UE communicates with the network, control is performed by the eNB, and deployment of a form in which 5G entity of the core network is used may be possible. In this case, mobility management between the UE and the AMF and session management between the UE and the SMF may be performed in a layer 3, non-access stratum (NAS) layer.

On the other hand, layer 2 AS (Access Stratum) may be transmitted between the UE and the eNB. Accordingly, when the UE 101 accesses the 5G RAN 103, a method for creating and managing a security context is required. Therefore, in this disclosure, security context creation, management, and protocol exchange applicable to such a deployment situation will be described.

Although the communication network on which the present disclosure is based assumes a network of 5G and 4G LTE, it can be applied if the same concept is applied to other systems within a range that can be understood by a person of ordinary skill in the art.

1A and 1B , the base station 104 is a 5G satellite RAN. The base station 104 may be a Low Earth orbit (LEO), a Medium Earth Orbit (MEO), a Geostationary Orbit (GEO), or other satellite RAN. For satellite base stations, LEO refers to an altitude below 2000 km, for MEO an altitude between 8000 km and 25000 km, and for GEO an altitude of 35786 km.

When the satellite base station is used, the area covered by the satellite base station is wider than the area covered by the general base station, referring to FIG. 1B . That is, the area covered by the satellite NR is wider than the area covered by the general 5G-NR. As the area covered by the satellite base station is wide, the area covered by the satellite base station may not be limited to the region of one country. For example, when several countries are adjacent, the area covered by the satellite base station may include areas of several countries.

For example, referring to FIG. 1B , the area covered by the satellite RAN 104 may include areas A, B, and C. As shown in FIG. 1B , there may be cases in which the coverage of the satellite RAN 104 spans several regions and several countries.

On the other hand, artificial satellite NR may have the advantage of being able to continue to use in an environment where a base station cannot be easily established, such as in the sea, beyond the land area, or even if the base station is damaged due to a disaster situation.

In addition, when the base station's coverage spans several countries, when the base station performs communication, it may also be a problem in which country's regulation, regulation, or law should be followed. In addition, in the case of satellite NR, it should be considered that it may be more expensive than general 5G NR communication in terms of cost.

2 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellites according to an embodiment of the present disclosure.

An operation when the UE sends a registration request message to the AMF and a series of operations related to timers related thereto will be described with reference to FIG. 2 .

The case of FIG. 2 corresponds to a case of setting a timer value according to an artificial satellite RAT (Radio Access Technology) type because it is set for the first time as an embodiment when the UE performs initial registration.

In steps 201 , 203 , and 205 , the UE 101 transmits a registration request message to the AMF 111 to register the terminal.

In steps 201 and 203 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 201 and 203 , the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- UE MM (Mobility Management) capability may include capability information on whether to support the artificial satellite RAN of the UE.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include various RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type it wants to use when registering. This may be a RAT type requested by the UE based on the UE's subscription.

Referring to step 205,

When the UE 101 transmits a registration request message to the AMF 111 as in steps 201 and 203 , the UE 101 sets T3510 in steps 205 . T3510 is a timer that sets start while the UE 101 transmits a registration request message and stops when the UE 101 receives a registration accept or registration reject message.

- In one embodiment, T3510 may be configured as in the case of general 5G NR.

- In another embodiment, the T3510 may be an extended timer set on the assumption that artificial satellite NR is used.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and configure the T3510 using the stored extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. In one embodiment, in case of LEO, MEO, and GEO, when the UE receives a timer extension indication, it may be set by multiplying a timer extension possible multiple by a basic value of a timer.

In steps 221 , 223 , and 225 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In steps 221 and 223 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

In particular, in the case of the registration accept message transmitted from the AMF 111 to the UE 101 in steps 221 and 223, RAT type information accessible to the UE 101, an indication indicating whether the UE's timer extension is possible, extended priority, timer extension It may include information such as value.

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then performs registration by using the information when transmitting a registration request message. That is, the UE may perform functions such as PLMN selection for selecting an accessible public land mobile network (PLMN) and RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating to set the extended timer in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type.

In step 225 , when the UE 101 receives a registration accept or registration reject message from the AMF 111 , the UE 101 stops T3510.

3 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

FIG. 3 describes an operation when the UE sends a registration request message to the AMF and a series of operations related to timers related thereto.

In the case of FIG. 3 , the UE 101 performs periodic registration. Since a RAT accessible to the UE 101 may be set, a timer value according to the satellite RAT type accessible to the UE 101 is set. applicable to the case

In steps 301 , 303 , and 305 , the UE 101 transmits a registration request message to the AMF 111 to register the terminal.

In steps 301 and 303 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 301 and 303,

The UE 101 has already completed registration through the initial registration process,

This is a case in which the UE 101 has information on the RAT type that can be accessed in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Referring to steps 301 and 303 , the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. Also, even in the case of the 3GPP access type, the RAT type may include various RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

3 illustrates a case in which the UE 101 transmits a periodic registration request message.

Referring to step 305

UE 101 has already completed registration through the initial registration process,

Periodic registration request is executed.

In this case, the UE 101 has information on the RAT type accessible in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

So, referring to step 305,

The UE 101 may determine whether to set T3510 as extended T3510 or normal T3510 according to the RAT-type.

In another embodiment, the UE 101 may configure T35xx serving as extended T3510 when the RAT-type is an artificial satellite RAN instead of extended T3510.

In another embodiment, the UE 101 is based on the last visited TAI (Tracking Area Identity) based on the TA (Tracking Area) information that the UE 101 has recently visited based on the RAT-Type supported by the TA. Based on this, the value of T3510 can be determined.

Referring to step 305,

When the UE 101 transmits a registration request message to the AMF 111 as in steps 301 and 303 , the UE 101 sets T3510 in step 305 . T3510 is a timer that sets start while the UE 101 transmits a registration request message and stops when the UE 101 receives a registration accept or registration reject message.

- In an embodiment, T 3510 may be configured as in the case of general 5G NR.

- In another embodiment, T 3510 may be an extended timer set on the assumption that artificial satellite NR is used.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and set it using the stored extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. In an embodiment, when the UE receives a timer extension indication in the case of LEO, MEO, and GEO, it may be set by multiplying a timer extension possible multiple by a basic value of a timer.

In steps 321 , 323 , and 325 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In steps 321 and 323 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

In steps 321 and 323, the registration accept message transmitted from the AMF 111 to the UE 101 is RAT type information accessible to the UE 101, an indication indicating whether the timer extension of the UE 101 is possible, extended priority, It may include information such as a timer extension value.

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

-

- When the UE 101 receives the accessible RAT type information, the UE 101 may store the accessible RAT type information and then perform registration by using the corresponding information when transmitting a registration request message. The UE 101 may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating to set the extended timer in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type.

In step 325 , when the UE 101 receives a registration accept or registration reject message from the AMF 111 , the UE 101 stops T3510 .

4 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

4 describes an operation when the UE sends a registration request message to the AMF and a series of operations related to timers related thereto.

In the case of FIG. 4 , the UE 101 receives information on both 5G NR and satellite RAT as an accessible RAT. Therefore, the UE 101 corresponds to a case in which both a value corresponding to the normal 5G NR case and an extended timer value corresponding to the satellite RAT can be set.

In steps 401, 403, and 405, the UE 101 transmits a registration request message to the AMF 111 to register the terminal. In steps 401 and 403 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 401 and 403,

Since the UE 101 has already completed registration through the initial registration process, it has information on the RAT type that the UE can access in the region.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Referring to steps 401 and 403 , the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

4 illustrates a case in which the UE 101 transmits a periodic registration request message.

Referring to step 405,

UE 101 has already completed registration through the initial registration process,

Periodic registration request is executed.

In this case, the UE 101 has information on the RAT type that can be accessed in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Therefore, referring to step 405,

The UE 101 may determine whether to set T3510 as extended T3510 or normal T3510 according to the RAT-type.

In another embodiment, the UE 101 may configure T35xx serving as extended T3510 when the RAT-type is an artificial satellite RAN instead of extended T3510.

In another embodiment, the UE 101 may determine the value of T3510 based on the RAT-Type supported by the TA based on the TA information the UE recently visited based on the last visited TAI.

Referring to step 405,

When the UE 101 transmits a registration request message to the AMF 111 as in steps 401 and 403 , the UE 101 sets T3510 in steps 405 . T3510 is a timer that sets start while the UE 101 transmits a registration request message and stops when the UE 101 receives a registration accept or registration reject message.

- In an embodiment, T 3510 may be configured as in the case of general 5G NR.

- In another embodiment, it is assumed that the T 3510 uses artificial satellite NR and may be an extended timer.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and set it using the stored extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. That is, in the case of LEO, MEO, and GEO, according to an embodiment, when the UE receives a timer extension indication, the default value of the timer may be multiplied by a timer extension possible multiple to set.

In steps 421 , 423 , and 425 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In steps 421 and 423 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

The registration accept message transmitted from the AMF 111 to the UE 101 in steps 421 and 423 is RAT type information accessible to the UE 101, an indication indicating whether the timer extension of the UE 101 is possible, extended priority, It may include information such as a timer extension value.

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) that the UE can support”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

-

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE 101 may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating to set the extended timer in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type.

In step 425 , when the UE 101 receives a registration accept or registration reject message from the AMF 111 , the UE 101 stops T3510.

5 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

FIG. 5 describes an operation when the UE sends a registration request message to the AMF and a series of operations related to timers related thereto.

In the case of Figure 5

This is a case in which the UE 101 receives both information on 5G NR and satellite RAT as an accessible RAT. Therefore, the UE 101 corresponds to a case in which both a value corresponding to the normal 5G NR case and an extended timer value corresponding to the satellite RAT can be set.

Also, in this case, even if the same operation is performed for 5G NR and artificial satellite RAT, different timers are set and used.

In an embodiment, sending a registration request and UE 101 sets T3510 in case of 5G NR. On the other hand, if the UE 101 can access the RAT type corresponding to the satellite RAT, the UE 101 may send a registration request message and set the extended timer T35xx value.

Another embodiment is a case in which the timer values are used differently even though the timers are the same. Sending a registration request, UE 101 sets T3510 in case of 5G NR. On the other hand, if the UE 101 is able to access the RAT type corresponding to the satellite RAT, the UE 101 sends a registration request message and an extended timer value for T3510, for example, a value set as an extended timer value or A value obtained by multiplying the default timer value can be set.

In steps 501, 503, and 505, the UE 101 transmits a registration request message to the AMF 111 to register the terminal.

In steps 501 and 503 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 501 and 503,

Since the UE 101 has already completed registration through the initial registration process,

The UE has information on the RAT type that can be accessed in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Referring to steps 501 and 503 , the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

5 is

A case in which the UE 101 transmits a periodic registration request message is shown.

Referring to step 505 , the UE 101 has already completed registration through the initial registration process and performs a periodic registration request.

In this case, the UE 101 has information on the RAT type that can be accessed in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Therefore, referring to step 505,

The UE 101 may determine whether to set T3510 as extended T3510 or normal T3510 according to the RAT-type.

As another embodiment, when the RAT-type is an artificial satellite RAN instead of the extended T3510, the UE 101 may configure T35xx serving as extended T3510.

In another embodiment, the UE 101 may determine the value of T3510 based on the RAT-Type supported by the TA based on the TA information the UE recently visited based on the last visited TAI.

Referring to step 505,

When the UE transmits a registration request message to the AMF as in steps 501 and 503 , the UE 101 sets T3510 in step 505 . T3510 is a timer that sets start while the UE 101 transmits a registration request message and stops when the UE 101 receives a registration accept or registration reject message.

- In one embodiment, T3510 may be configured as in the case of general 5G NR.

- In another embodiment, it is assumed that the T3510 uses artificial satellite NR and may be an extended timer.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and set it using the extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. That is, in the case of LEO, MEO, and GEO, according to an embodiment, when the UE receives a timer extension indication, the default value of the timer may be multiplied by a timer extension possible multiple to set.

In steps 521 , 523 , and 525 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In steps 521 and 523 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

The registration accept message transmitted from the AMF 111 to the UE 101 in steps 521 and 523 is RAT type information accessible to the UE 101, an indication indicating whether the timer extension of the UE 101 is possible, extended priority, It may include information such as a timer extension value.

-

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Informing the RAT type supported by the network, 2) The network is capable of providing a service to the UE among “RAT types (lists) that the UE can support”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating to set the extended timer in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the RAT type of the satellite NR may transmit a timer extension fixed value value according to a value determined by a regulation or a specification according to the LEO, MEO, GEO, or other RAT type.

As shown in step 525 , when the UE 101 receives a registration accept or registration reject message from the AMF 111 , the UE 101 stops T3510.

6 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

6 describes an operation when the UE sends a registration request message to the AMF and a series of operations related to timers related thereto.

In the case of Figure 6

This is a case in which the UE 101 receives both information on 5G NR and satellite RAT as an accessible RAT. Therefore, when the UE 101 can set both the value corresponding to the normal 5G NR and the extended timer value corresponding to the satellite RAT, the timer value is set with the help of the NR, that is, the base station.

Therefore, in this case, the UE 101 is, as in 600-1, 600-3, and 600-5, an RRC complete message among RRC (Radio Resource Control) messages with the help of an AS (Access Stratum) layer, that is, the base station Through a message transmitted from the 104 to the UE 101, a value for whether the extended timer is transmitted is received. Thereafter, the UE 101 transmits the received extended timer value from the AS layer to the NAS layer to use the corresponding timer value.

For example, in step 600-1, the UE 101 sends an RRC setup message to the 5G-satellite RAN 104, and in step 600-3, the UE 101 receives an RRC response message. As in step 600-5, when the cell to camp is determined while the UE 101 sends an RRC complete message to the 5G-satellite RAN 104, the UE 101 sends the RRC complete message while the registration of step 601 You can send a request message.

As another embodiment, the UE 101 may calculate a NAS timer value to be used in the NAS layer based on the T timer value used in the AS layer. That is, in one embodiment, the UE 101 may have a method of calculating the NAS timer value by multiplying the T timer value used in the AS layer, and transferring it from the AS layer to the NAS layer. In another embodiment, the UE 101 may transmit the T timer value from the AS layer to the NAS layer, and the NAS layer may set and use the timer value of the NAS layer based on the AS layer value.

In steps 601 , 603 , and 605 , the UE 101 transmits a registration request message to the AMF 111 to register the terminal.

In steps 601 and 603 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 601 and 603,

Since the UE 101 has already completed registration through the initial registration process, it has information on the RAT type that the UE can access in the region.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Referring to steps 601 and 603 , the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE. This information can be informed by using an indication called Satelite RATCapable.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element. This information can be informed by using an indication called Satelite RATCapable.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

[Table 1] registration request message

[ Table 2 ] 5GMM capability

6 illustrates a case in which the UE 101 transmits a periodic registration request message.

Referring to step 605, the UE 101 has already completed registration through the initial registration process,

Periodic registration request is executed.

Alternatively, according to an embodiment, the UE 101 may perform registration through an initial registration process.

In this case, the UE 101 has information on the RAT type that can be accessed in the corresponding area.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Therefore, referring to step 605,

The UE 101 may determine whether to set the extended T3510 or the normal T3510 according to the RAT-type for the T3510.

As another embodiment, when the RAT-type is an artificial satellite RAN instead of the extended T3510, the UE 101 may configure T35xx serving as extended T3510.

In another embodiment, the UE 101 may determine the value of T3510 based on the RAT-Type supported by the TA based on the TA information the UE recently visited based on the last visited TAI.

Referring to step 605,

When the UE transmits a registration request message to the AMF as in steps 601 and 603 , the UE 101 sets T3510 in step 605 . T3510 is a timer that sets start while the UE 101 transmits a registration request message and stops when the UE 101 receives a registration accept or registration reject message.

- In one embodiment, T3510 may be configured as in the case of general 5G NR.

- In another embodiment, it is assumed that the T3510 uses artificial satellite NR and may be an extended timer.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and set it using the extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. That is, in the case of LEO, MEO, and GEO, according to an embodiment, when the UE receives a timer extension indication, the default value of the timer may be multiplied by a timer extension possible multiple to set.

In steps 621 , 623 , and 625 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In steps 621 and 623 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

The registration accept message transmitted from the AMF 111 to the UE 101 in steps 621 and 623 is RAT type information accessible to the UE 101, an indication indicating whether the timer extension of the UE 101 is possible, extended priority, It may include information such as a timer extension value.

[ Table 3 ] Registration Accept message

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating that the extended timer is set in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the RAT type of the satellite NR may transmit a timer extension fixed value value according to a value determined by a regulation or a specification according to the LEO, MEO, GEO, or other RAT type.

- This timer extension fixed value may be delivered through an information element called Extended T3510 value, T3510 value, and New Timer T35xx value. In the case of the extended T3510 value, it is a T3510 value. If the RAT is an artificial satellite, a predetermined value may be transmitted depending on the artificial satellite, and it may be transmitted using GPRS timer, GPRS timer2, GPRS timer 3, etc. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for the RAT that the UE camped for, that is, the RAT that the AMF camped for, that is, the RAT that the UE camped for, if the RAT type is a normal 5G RAN, it is the T3510 default value, and if the RAT type is an artificial satellite RAT, it is extended. It may be transmitted as a T3510 value.

As shown in step 625 , when the UE 101 receives a registration accept or registration reject message from the AMF 111 , the UE 101 stops T3510.

7 is a diagram illustrating the configuration of a terminal according to an embodiment of the present disclosure.

As shown in FIG. 7 , the terminal of the present disclosure may include a transceiver 710 , a memory 720 , and a processor 730 . The processor 730 , the transceiver 710 , and the memory 720 of the terminal may operate according to the communication method of the terminal described above. However, the components of the terminal are not limited to the above-described example. For example, the terminal may include more or fewer components than the aforementioned components. In addition, the processor 730 , the transceiver 710 , and the memory 720 may be implemented in the form of a single chip.

The transmitter/receiver 710 collectively refers to a receiver of a terminal and a transmitter of the terminal, and may transmit/receive a signal to/from a base station or a network entity. A signal transmitted and received with the base station may include control information and data. To this end, the transceiver 710 may include an RF transmitter that up-converts and amplifies a frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts a received signal. However, this is only an embodiment of the transceiver 710 , and components of the transceiver 710 are not limited to the RF transmitter and the RF receiver.

In addition, the transceiver 710 may include a wired/wireless transceiver, and may include various configurations for transmitting and receiving signals.

In addition, the transceiver 710 may receive a signal through a wireless channel, output it to the processor 730 , and transmit a signal output from the processor 730 through a wireless channel.

In addition, the transceiver 710 may receive a communication signal and output it to the processor, and transmit the signal output from the processor to a network entity through a wired/wireless network.

The memory 720 may store programs and data necessary for the operation of the terminal. Also, the memory 720 may store control information or data included in a signal obtained from the terminal. The memory 720 may be configured as a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD.

The processor 730 may control a series of processes so that the terminal can operate according to the above-described embodiment of the present disclosure. The processor 730 may include at least one or more processors. For example, the processor 730 may include a communication processor (CP) that controls for communication and an application processor (AP) that controls an upper layer such as an application program.

8 is a diagram illustrating a configuration of a network entity according to an embodiment of the present disclosure.

As shown in FIG. 8 , the network entity of the present disclosure may include a transceiver 810 , a memory 820 , and a processor 830 . According to the above-described communication method of the network entity, the processor 830 , the transceiver 810 , and the memory 820 of the network entity may operate. However, the components of the network entity are not limited to the above-described example. For example, the network entity may include more or fewer components than the aforementioned components. In addition, the processor 830 , the transceiver 810 , and the memory 820 may be implemented in the form of a single chip. The network entity is, as described above, AMF (Access and Mobility Management Function), SMF Session Management Function), PCF (Policy and Charging Function), NEF (Network Exposure Function), UDM (Unified Data Management), UPF (User Plane Function), etc. may include a network function (NF, Network Function) of In addition, it may include a base station (base station).

The transmitter/receiver 810 collectively refers to a receiver of a network entity and a transmitter of a network entity, and may transmit/receive a signal to/from a terminal or other network entity. In this case, the transmitted/received signal may include control information and data. To this end, the transceiver 810 may include an RF transmitter that up-converts and amplifies the frequency of a transmitted signal, and an RF receiver that low-noise amplifies and down-converts a received signal. However, this is only an embodiment of the transceiver 810 , and components of the transceiver 810 are not limited to the RF transmitter and the RF receiver. The transceiver 810 may include a wired/wireless transceiver, and may include various components for transmitting and receiving signals.

In addition, the transceiver 810 may receive a signal through a communication channel (eg, a wireless channel) and output it to the processor 830 , and transmit the signal output from the processor 830 through the communication channel.

In addition, the transceiver 810 may receive a communication signal and output it to the processor, and transmit the signal output from the processor to a terminal or a network entity through a wired/wireless network.

The memory 820 may store programs and data necessary for the operation of the network entity. Also, the memory 820 may store control information or data included in a signal obtained from a network entity. The memory 820 may be configured as a storage medium or a combination of storage media such as ROM, RAM, hard disk, CD-ROM, and DVD.

The processor 830 may control a series of processes so that the network entity operates according to the above-described embodiment of the present disclosure. The processor 830 may include at least one or more processors. Methods according to the embodiments described in the claims or specifications of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in the computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device). One or more programs include instructions for causing an electronic device to execute methods according to embodiments described in a claim or specification of the present disclosure.

Such programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable ROM (electrically erasable programmable read only memory, EEPROM), magnetic disc storage device, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all thereof. In addition, each configuration memory may be included in plurality.

In addition, the program is transmitted through a communication network consisting of a communication network such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), or a storage area network (SAN), or a combination thereof. It may be stored on an attachable storage device that can be accessed. Such a storage device may be connected to a device implementing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may be connected to the device implementing the embodiment of the present disclosure.

9 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

9 illustrates an operation when the UE sends a service request message to the AMF and a series of operations related to timers related thereto.

In the case of FIG. 9 , the UE 101 receives information on both 5G NR and satellite RAT as an accessible RAT. Therefore, when the UE 101 can set both the value corresponding to the normal 5G NR and the extended timer value corresponding to the satellite RAT, the timer value is set with the help of the NR, that is, the base station.

Therefore, in this case, the UE 101 is, as in 900-1, 900-3, and 900-5, an RRC complete message among RRC messages with the help of the AS layer, that is, a message transmitted from the base station to the UE. Receives a value for extended timer or not. Thereafter, the UE 101 transmits the received extended timer value from the AS layer to the NAS layer to use the corresponding timer value.

For example, in step 900-1, the UE 101 sends an RRC setup message to the 5G-satellite RAN 104, and in step 900-3, the UE 101 receives an RRC response message. As in step 900-5, when the UE 101 determines the cell to be capming while sending the RRC complete message to the 5G-satellite RAN 104, the service request message of step 901 while sending the RRC complete message of 900-5 can send

As another embodiment, the UE 101 may calculate a NAS timer value to be used in the NAS layer based on the T timer value used in the AS layer. That is, in one embodiment, the UE 101 may have a method of calculating the NAS timer value by multiplying the T timer value used in the AS layer and transferring it from the AS layer to the NAS layer. In another embodiment, the UE 101 may transmit the T timer value from the AS layer to the NAS layer and set and use the timer value of the NAS layer based on the AS layer value in the NAS layer.

In steps 901 , 903 , and 905 , the UE 101 transmits a service request message to the AMF 111 to recover that the terminal has lost communication to the AMF.

In steps 901 and 903 , the UE 101 transmits a service request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to steps 901 and 903,

Since the UE 101 has already completed registration through the initial registration process, the UE has information about the RAT type accessible in the region.

Accordingly, the UE 101 may transmit a service request message with information of an accessible RAT type.

Referring to steps 901 and 903, the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted as a separate information element.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, it is possible to inform the AMF with what capability the UE can support the satellite RAN by using the information of the access type and the RAT type together or by using the information of the RAT type alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

[Table 4] service request message

Referring to step 905

A case in which the UE 101 has information on an accessible RAT type in a corresponding area is illustrated.

Accordingly, the UE 101 may transmit a service request message with information of an accessible RAT type.

So, referring to step 905,

The UE 101 may determine whether to set extended T3517 or normal T3517 for T3517 according to the RAT-type.

In another embodiment, when the RAT-type is an artificial satellite RAN instead of extended T3517, T35yy serving as extended T3517 may be configured.

Alternatively, in another embodiment, the UE 101 may determine the value of T3517 based on the RAT-Type supported by the TA based on the TA information the UE recently visited based on the last visited TAI.

Referring to step 905,

When the UE transmits a servicerequest message to the AMF as in steps 901 and 903, the UE 101 sets T3517 in step 905. T3517 is a timer that sets start while the UE 101 transmits a service request message and stops when the UE 101 receives a service accept or service reject message.

- In one embodiment, T3517 may be configured as in the case of general 5G NR.

- In another embodiment, it is assumed that the T3517 uses artificial satellite NR and may be an extended timer.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3517 may store the corresponding value and set it using the stored extended value.

- In another embodiment, when the UE receives an indication that the timer extension is possible from the AMF, the T3517 may set the T3517 to multiple (multiple) the T3517. That is, in the case of LEO, MEO, and GEO, according to an embodiment, when the UE receives a timer extension indication, the default value of the timer may be multiplied by a timer extension possible multiple to set.

In steps 921 , 923 , and 925 , the AMF 111 transmits a service accept or service reject message to the UE 101 .

In steps 921 and 923 , the AMF 111 transmits a service accept or service reject message to the UE 101 . This Service Accept or Service reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

In particular, in the case of the service accept message transmitted to the UE in the AMF of steps 921 and 923, information such as RAT type information accessible to the UE, an indication indicating whether the UE's timer extension is possible, extended priority, timer extension value, etc. may be included. .

[ Table 5 ] service accept message

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. Based on the RAT type and 3) subscription information of the UE, such information such as RAT type information indicating that the AMF can support the UE may be informed.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information when transmitting a service request message to perform a service request process. That is, a function such as PLMN selection may be performed by selecting an accessible PLMN or RAT type at the time of a service request.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating that the extended timer is set in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the RAT type of the satellite NR may transmit a timer extension fixed value value according to a value determined by a regulation or a specification according to the LEO, MEO, GEO, or other RAT type.

As shown in the step of the UE 101 receiving the service accept or servicereject message from the AMF 111, that is, step 925, when the UE 101 receives the service accept or service reject message, the UE 101 sends T3517 will stop

This timer extension fixed value may be delivered through an information element called Extended T3517 value, T3517 value, or New Timer T35yy value. In the case of the extended T3517 value, it is a T3517 value, and if the RAT is an artificial satellite, a predetermined value may be transmitted depending on the satellite. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for T3517, if the RAT that the UE camped, that is, the RAT that the AMF is known as the RAT that the UE camped for, the RAT type is normal 5G RAN, the T3517 default value, and if the RAT type is the satellite RAT, the extended T3517 value can be sent to

10 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

In FIG. 10 , an operation when the UE 101 sends a PDU session establishment message to the SMF 121 and a series of operations related to timers related thereto will be described.

In steps 1001, 1003, and 1005, the UE 101 sends a registration request to the AMF 111 and sets or starts T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1001 and 1003 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

In steps 1021, 1023, and 1025, the UE 101 receives a registration accept or registration reject message from the AMF 111 and stops T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1021 and 1023 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

In steps 1031, 1033, 1035, and 1037, the UE sends a PDU session establishment request to the SMF and sets or starts T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1031 , 1033 , and 1035 , the UE 101 transmits a PDU session establishment request message to the SMF 121 . This PDU session establishment request message is transmitted from the UE 101 to the SMF 121 through the 5G satellite RAN 104 and the AMF 111 .

In step 1037, the UE 101 sets or starts T3580, extended T3580, or T3580 set as an extended timer value.

In this case, the UE 101 may set the value of T3580 according to the RAT type of the RAN to which the UE 101 is connected. That is, when the RAT type of the RAN to which the UE 101 is connected is an artificial satellite RAT, the value of T3580 may be set as an extended value.

Alternatively, the UE 101 may receive the T3580-related value set through the registration request message of the previous step.

[ Table 6 ] Registration Accept message

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. That is, functions such as PLMN selection can be performed by selecting accessible PLMN and RAT types during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating that the extended timer is set in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the RAT type of the satellite NR may transmit a timer extension fixed value value according to a value determined by a regulation or a specification according to the LEO, MEO, GEO, or other RAT type.

- The SM Timer extension fixed value indicates by setting a value so that the timer is set according to the RAT type to which the UE is connected when the UE sets the timer for the message transmitted to the SMF. In the case of such an SM timer extension fixed value, it may be transmitted as a timer extension fixed value value according to a value determined by a regulation or a specification according to whether the RAT type of the satellite NR is an LEO, MEO, GEO, or other RAT type. This timer extension fixed value may be delivered through an information element called Extended T3580 value, T3580 value, and New Timer T35aa value. In the case of the extended T3580 value, it is a T3580 value. If the RAT is an artificial satellite, a predetermined value may be transmitted depending on the artificial satellite, and it may be transmitted using GPRS timer, GPRS timer2, GPRS timer 3, etc. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for T3580, if the RAT that the UE camped for, that is, the RAT known as the RAT that the UE camped for, that is, the AMF, the RAT type is normal 5G RAN, the T3580 default value, and in the case of the satellite RAT, the extended T3580 value. can

[Table 7] PDU session establishment request message

Through the PDU session establishment request, the UE may request establishment for a PDU session corresponding to the corresponding RAT type. This is to establish a PDU session for the corresponding RAT whether the RAT type corresponds to a general 5G NR or an artificial satellite RAT.

In steps 1041, 1043, 1045, and 1047, the UE 101 receives the PDU session establishment accept/reject message from the SMF 121 and stops T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1041, 1043, and 1045, the SMF 121 transmits a PDU session establishment Accept/Reject message to the UE 101. This PDU session establishment Accept/Reject message is transmitted from the SMF 121 to the UE 101 through the AMF 111 , the 5G satellite RAN 104 , and the like.

[Table 8] PDU SESSION ESTABLISHMENT ACCEPT

- Alternatively, the UE may inform the extended T3580 value, the SM timer extension value, or the T3580 value in the PDU session establishment accept message.

A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. That is, functions such as PLMN selection can be performed by selecting accessible PLMN and RAT types during registration.

- The indication indicating whether the UE's SM timer extension is possible is an indication indicating that the extended timer is set in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, a timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to whether the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type.

- Alternatively, the SMF may inform the UE that a timer for satellites longer than the default SM timer should be used through the SM timer extension indication. In such a case, the affected timers are T3580, T3581, and T3582, and if there is an SM timer extension indication, the timer can be extended to suit the artificial satellite where the UE is camping. In an embodiment, a method of multiplying a timer according to the type of artificial satellite may be used.

- In one embodiment, in the case of T35aa, T35bb, and T35cc values, if the RAT accessed by the UE is an artificial satellite RAT corresponding to T3580, T3581, and T3582, respectively, in the case of a PDU session establishment request, a PDU session modification request, and a PDU session release request, extended new It may be a value set as timer. Depending on the type of satellite, it is transmitted using GPRS timer, GPRS timer2, GPRS timer 3, etc. can Or for T3580, T3581, T3582, if it is a 5G RAN that is normal according to the RAT type for the RAT that the UE camped for, that is, the RAT that the AMF is known as the RAT that the UE camped for, the T3580, T3581, T3582 default value is the default value of the satellite RAT. case can be transmitted as an extended T3580 value, an extended T3581 value, and an extended T3582 value.

- The SM Timer extension fixed value indicates by setting a value so that the timer is set according to the RAT type to which the UE is connected when the UE sets the timer for the message transmitted to the SMF. In the case of such an SM timer extension fixed value, a timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to whether the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type. This timer extension fixed value may be delivered through an information element called Extended T3580 value, T3580 value, and New Timer T35aa value. In the case of the extended T3580 value, it is a T3580 value. If the RAT is an artificial satellite, a predetermined value may be transmitted depending on the artificial satellite, and it may be transmitted using GPRS timer, GPRS timer2, GPRS timer 3, etc. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for T3580, if the RAT that the UE camped, that is, the RAT that the AMF is known as the RAT that the UE camped for, the RAT type is normal 5G RAN, the T3580 default value, and in the case of the satellite RAT, it will be transmitted as the extended T3580 value. can

- RAT type: Through a PDU session establishment request, the UE may request establishment for a PDU session corresponding to the RAT type. This is to establish a PDU session for the corresponding RAT whether the RAT type corresponds to a general 5G NR or an artificial satellite RAT.

11 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

11 illustrates an operation when the UE sends a PDU session modification message to the SMF and a series of operations related to timers related thereto.

In steps 1101, 1103, and 1105, the UE 101 sends a registration request to the AMF 111 and sets or starts T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1101 and 1103 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

In steps 1121, 1123, and 1125, the UE 101 receives the registration Accept message from the AMF 111 and stops T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1121 and 1123 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

In steps 1131, 1133, 1135, and 1137, the UE 101 sends a PDU session establishment request to the SMF 121 and sets or starts T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1131 , 1133 , and 1135 , the UE 101 transmits a PDU session establishment request message to the SMF 121 . This PDU session establishment request message is transmitted from the UE 101 to the SMF 121 through the 5G satellite RAN 104 and the AMF 111 .

In step 1137, the UE 101 sets or starts T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1141, 1143, 1145, and 1147, the UE 101 receives the PDU session establishment accept/reject message from the SMF 121 and stops T3580, or extended T3580, or T3580 set as an extended timer value.

In steps 1141, 1143, and 1145, the SMF 121 transmits a PDU session establishment Accept/Reject message to the UE 101. This PDU session establishment Accept/Reject message is transmitted from the SMF 121 to the UE 101 through the AMF 111 , the 5G satellite RAN 104 , and the like.

In steps 1151, 1153, 1155, and 1157, the UE 101 sends a PDU session modification request to the SMF 121 and sets or starts T3581 or extended T3581, or T3581 or T35bb set as an extended timer value.

In steps 1151 , 1153 , and 1155 , the UE 101 transmits a PDU session modification request message to the SMF 121 . This PDU session modification request message is transmitted from the UE 101 to the SMF 121 through the 5G satellite RAN 104 and the AMF 111 .

In step 1157, the UE 101 sets or starts T3581 or extended T3581, or T3581 or T35bb set as an extended timer value.

The timer set to T3581, extended T3581, or T3581 set to the extended timer value, or T35bb which is a new timer is SM-related timer information in the registration accept received in response to the registration request by the UE 101, or the PDU It can be known through SM timer-related information received through the session establishment accept message.

Through the PDU session modification request, the UE 101 may request modification of the PDU session corresponding to the corresponding RAT type. This is to modify the PDU session for the corresponding RAT whether the RAT type corresponds to a general 5G NR or an artificial satellite RAT.

[Table 9] PDU session modification request

In steps 1161, 1163, 1165, and 1167, the UE 101 receives the PDU session modification command message from the SMF 121 and stops T3581, extended T3581, or T3581 set as an extended timer value.

In steps 1161, 1163, and 1165, the SMF 121 transmits a PDU session modification command message to the UE 101. This PDU session modification command message is transmitted from the SMF 121 to the UE 101 through the AMF 111 and the 5G satellite RAN 104 .

[Table 10] PDU session modification command

12 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

In FIG. 12 , an operation when the UE 101 sends a PDU session release request message to the SMF 121 and a series of operations related to timers related thereto will be described.

In steps 1201, 1203, and 1205, the UE 101 sends a registration request to the AMF 111 and sets or starts T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1201 and 1203 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

In steps 1221, 1223, and 1225, the UE 101 receives a registration response message from the AMF 111 and stops T3510, extended T3510, or T3510 set as an extended timer value.

In steps 1221 and 1223 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 through the 5G satellite RAN 104 .

In steps 1231, 1233, 1235, and 1237, the UE 101 sends a PDU session establishment request to the SMF 121 and sets or starts T3580, or extended T3580, or T3580 set as an extended timer value.

In steps 1231 , 1233 , and 1235 , the UE 101 transmits a PDU session establishment request message to the SMF 121 . This PDU session establishment request message is transmitted from the UE 101 to the SMF 121 through the 5G satellite RAN 104 and the AMF 111 .

In step 1237, the UE 101 sets or starts T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1241, 1243, 1245, and 1247, the UE 101 receives the PDU session establishment accept/reject message from the SMF 121 and stops T3580, extended T3580, or T3580 set as an extended timer value.

In steps 1241, 1243, and 1245, the SMF 121 transmits a PDU session establishment Accept/Reject message to the UE 101. This PDU session establishment Accept/Reject message is transmitted from the SMF 121 to the UE 101 through the AMF 111 , the 5G satellite RAN 104 , and the like.

In steps 1271, 1273, 1275, and 1277, the UE 101 sends a PDU session release request to the SMF 121 and sets or starts T3582, or extended T3582, or T3582, or T35cc set as an extended timer value.

In steps 1271, 1273, and 1275, the UE 101 transmits a PDU session release request message to the SMF 121. This PDU session release request message is transmitted from the UE 101 to the SMF 121 via the 5G satellite RAN 104 and the AMF 111 .

In step 1277, the UE 101 sets or starts T3582, or extended T3582, or T3582 or T35cc set as an extended timer value.

The timer set to T3582, extended T3582, or extended timer value T3582, or new timer T35cc, etc. is SM-related timer information in the registration accept received in response to the registration request by the UE, or the UE accepts PDU session establishment It can be known through SM timer-related information received through the message.

Through the PDU session release request, the UE 101 may request release of the PDU session corresponding to the corresponding RAT type. This is to release a PDU session for the corresponding RAT whether the RAT type corresponds to a general 5G NR or an artificial satellite RAT.

[Table 11] PDU SESSION RELEASE REQUEST

In steps 1281, 1283, 1285, and 1287, the UE 101 receives the PDU session release command message from the SMF 121 and stops T3582, extended T3582, or T3582 set as an extended timer value.

In steps 1281, 1283, and 1285, the SMF 121 transmits a PDU session release command message to the UE 101. This PDU session release command message is transmitted from the SMF 121 to the UE 101 via the AMF 111 , the 5G satellite RAN 104 , and the like.

Upon receiving the PDU session release command in step 1287, the UE 101 releases the PDU session corresponding to the RAT type. This is to release the PDU session for the corresponding RAT whether the RAT type corresponds to a general 5G NR or an artificial satellite RAT.

[Table 12] PDU session release command

13 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

13 describes a series of operations related to the UE's security procedure.

In steps 1301 and 1303 , the UE 101 transmits a registration request message to the AMF 111 .

In steps 1301 and 1303 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

At this time, if the UE 101 is a terminal supporting the 5G satellite RAT type, the UE 101 may transmit security-related information supportable in the 5G satellite RAT type to the AMF.

Also, at this time, if the UE requests emergency service, 5G-SAT-IA0 is used for integrity protection among algorithms, and 5G-SAT-EA0 is used for encryption, that is, null integrity protection for artificial satellites and null encryption for artificial satellites. use protection.

That is, in the case of emergency service, the UE uses null integrity protection for 5G satellite RAN access, and null encryption protection for 5G satellite RAN access, and this algorithm is applied in the NAS layer or AS layer.

In an embodiment, the UE and the AMF section use 5G-EA0 and 5G-IA0 as a 5G security algorithm. And, through the process of informing the 5G satellite RAN in the AMF about the security algorithm available in the 5G satellite RAN, the AS layer section is null integrity protection for 5G-SAT-EA0, 5G-SAT-IA0 5G satellite RAN access, that is, Use null integrity protection for 5G satellite RAN access.

Alternatively, information on UE extended security capability as shown in the following tables is transmitted to the network. As shown in the following tables [Table 13], [Table 14], [Table 15], and [Table 16], the UE extended security capability can be coded in various forms, and the interpretation of the coded information is can be interpreted together.

[Table 13]

[Table 14]

[Table 15]

[Table 16]

[Table 17]

Upon receiving the message, the AMF stores the UE security capability, and then informs the UE of the security algorithm supported by the AMF, and also informs the RAN and the 5G satellite RAN if the 5G satellite RAN is supported.

That is, in the case of emergency service, null integrity protection and null encryption protection are used for the UE and the AMF section, and the UE and the 5G satellite RAN section. Null integrity protection for 5G satellite RAN access and null encryption protection for 5G satellite RAN access are used, and these algorithms are applied at the NAS layer or AS layer.

In an embodiment, the UE and the AMF section use 5G-EA0 and 5G-IA0 as a 5G security algorithm. And, through the process of informing the 5G satellite RAN of the security algorithm available in 5G satellite RAN from AMF, the UE and 5G satellite RAN section, that is, the AS layer section, is 5G-SAT-EA0, 5G-SAT-IA0 5G satellite RAN It is possible to use null integrity protection for access, that is, null integrity protection for 5G satellite RAN access.

Alternatively, in an embodiment, the UE and the AMF section use 5G-SAT-EA0, 5G-SAT-IA0 as a security algorithm for 5G satellite. And, through the process of informing the 5G satellite RAN of the security algorithm available in 5G satellite RAN from AMF, the UE and 5G satellite RAN section, that is, the AS layer section, is 5G-SAT-EA0, 5G-SAT-IA0 5G satellite RAN It is possible to use null integrity protection for access, that is, null integrity protection for 5G satellite RAN access.

In steps 1311 and 1313, the AMF 111 transmits an authentication request message to the UE 101.

In steps 1321 and 1323, the UE 101 transmits an authentication response message to the AMF 111.

In steps 1331 and 1333 , the AMF 111 transmits a security mode command message to the UE 101 .

In steps 1341 and 1343, the UE 101 transmits the security mode complete to the AMF 111.

In steps 1351 and 1353 , the AMF 111 transmits a registration response message to the UE 101 .

In steps 1351 and 1353 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

14 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

14 illustrates an operation when the UE sends a registration request message to the AMF and an operation related to PLMN selection.

In the case of FIG. 14 , the UE 101 receives information on both 5G NR and artificial satellite RAT as an accessible RAT. Therefore, when the UE 101 can set both the value corresponding to the normal 5G NR and the extended timer value corresponding to the satellite RAT, the NR, that is, the timer value is set with the help of the base station.

Alternatively, the UE receives information on any one of 5G NR and satellite RAT as an accessible RAT. Therefore, the UE may be able to set the timer value corresponding to the 5G artificial satellite.

Therefore, in this case, the UE 101, as in 1401, 1403, 1405, with the help of the AS (Access Stratum) layer RRC (Radio Resource Control) message of the RRC complete message, that is, from the base station 104 to the UE ( 101) receives the value for extended timer or not through the message delivered to . Thereafter, the UE 101 may transmit the received extended timer value from the AS layer to the NAS layer to use the corresponding timer value.

For example, in step 1401, the UE 101 sends an RRC setup message to the 5G-satellite RAN 104, and in step 1403, the UE 101 receives an RRC response message. As in step 1405, when the UE 101 determines the cell to be camping while sending the RRC complete message to the 5G-satellite RAN 104, the UE 101 sends the RRC complete message while sending the registration request message of step 1411 can be transmitted.

That is, in step 1401, the UE transmits an RRC connection request message to the 5G satellite RAN. This is when the idle UE attempts to establish an RRC connection in response to a call attempt, data transmission attempt, or paging.

In step 1403, the UE receives an RRC connection setup message that is a response message from the 5G satellite RAN. This is the case when the 5G satellite RAN accepts the UE's connection request.

In step 1405, the UE transmits an RRC connection setup complete message to the 5G satellite RAN and transitions to the RRC connection mode.

That is, the message transmitted in step 1405 is an RRC message sent from the UE to the 5G satellite RAN, and the RRC message includes the registration request message transmitted in step 1411, the registration request message is carried in the RRC message, or the RRC message A registration request message, which is a NAS message, can be carried piggy back (or concatenate).

As another embodiment, the UE 101 may calculate a NAS timer value to be used in the NAS layer based on the T timer value used in the AS layer. In one embodiment, the UE 101 calculates the NAS timer value by multiplying the T timer value used in the AS layer, and a method of transferring the value from the AS layer to the NAS layer may be used.

In another embodiment, the UE 101 may transmit the T timer value from the AS layer to the NAS layer, and the NAS layer may set and use the timer value of the NAS layer based on the AS layer value.

In connection with the selection of a public land mobile network (PLMN), the following process is performed. The PLMN may be identified by a mobile country code (MCC) and a mobile network code (MNC). The cell's PLMN information is included in the system information and broadcast.

When the UE is initially powered on, it searches for an available PLMN and selects an appropriate PLMN to receive the service. The NAS layer of the UE informs the AS layer that PLMN selection is required. The AS layer searches the corresponding band and informs the PLMN list to the NAS layer. The NAS layer of the UE may select a PLMN for registering the UE according to a priority order of PLMN/RAT selection stored in a user services identity module (USIM).

The UE searches for a regular cell among cells to which the PLMN belongs, and selects a cell capable of providing an appropriate service. A suitable cell is a cell in which a UE can receive a regular service. This cell must be an acceptable cell, belong to a PLMN to which the UE can access, and must be a cell in which the UE is not prohibited from performing the registration procedure. . Also, if the corresponding cell is a Closed Access Group cell (CAG) cell, the UE is a member of the CAG, so it must be an accessible cell.

On the other hand, a cell in which the terminal can be provided with a limited service is called an acceptable cell. An acceptable cell is a cell that satisfies the cell selection criteria of the terminal without being prohibited from camp on by the terminal in this cell. That is, an acceptable cell is a cell in which signal strength, signal quality, and the like are satisfied. If the terminal receives a limited service (limited service) is an emergency call (emergency call) or a disaster warning system (ETWS: earthquake and tsunami warning system) related services are provided, and these services are an acceptable cell (acceptable) cell can be provided in

This method is an automatic PLMN selection method.

The priority order is as follows.

- Home PLMN or Equivalent HPLMN or Recommended PLMN or Target PLMN or candidate PLMN (Recommended PLMN or Target PLMN or Candidate PLMN)

- or Home PLMN or Equivalent HPLMN or Recommended PLMN and access technology or Target PLMN and access technology or candidate PLMN and access technology

- The Home PLMN (HPLMN) may be an MCC of the UE IMSI and a PLMN having an MCC mapped to the MNC.

- Equivalent HPLMN (EHPLMN) may be a PLMN treated as equivalent to HPLMN.

- Here, the recommended PLMN or target PLMN or candidate PLMN refers to a PLMN that the UE recommends for registration and becomes a target or candidate for registration. A recommended PLMN or target PLMN or candidate PLMN is a PLMN that becomes a target or candidate for registration by recommending the UE to register in the relevant area according to the regulatory or satellite use agreement. This may be a PLMN containing a country code (MCC) or 90x code, or 9xx code, etc., which the UE is permitted to use in the current location by regulatory, inter-country agreements, or satellite use agreements in the relevant region.

- User controlled PLMN with access technology

- Operator controlled PLMN with access technology

- PLMN reported as high quality PLMN by AS

- Another method is the manual PLMN selection method, which is a method in which the user selects one PLMN from the PLMN list provided by the AS layer of the UE.

- Meanwhile, when the UE successfully completes location registration, the selected PLMN becomes an RPLMN, that is, a Registered PLMN (RPLMN), and the RPLMN becomes a PLMN on which location registration is successfully completed. On the other hand, Equvalnet PLMN (EPLMN) is a PLMN treated as equivalent to RPLMN. And, the Visited PLMN (VPLMN) refers to the PLMN when the UE is in a roaming state and a service is provided to the UE.

If the terminal is in a limited service state, when the terminal cannot receive a normal service from the PLMN, when the terminal cannot find a suitable cell, or when the terminal attempts an emergency call or uses an ETWS service In at least one case, the UE must camp on an acceptable cell and register with the network.

According to an embodiment, when the following conditions 1) to 4) are satisfied, the terminal may camp on the cell and register it with the network.

Condition 1) When the UE registers with the network, if the UE is in a limited service state, the UE cannot receive a normal service from the PLMN, or the UE cannot find a suitable cell. In the case of , the terminal must camp on an acceptable cell (acceptable cell).

Condition 2) At this time, if the RAT type or RAN type (or RAN) to be accessed is 5G satellite RAN,

Condition 3) 5G satellite RAN is an acceptable cell

Condition 4) If the emergency center, core network, etc. belong to the country where the terminal is physically located or the MCC PLMN where the terminal is physically located,

The UE can camp on 5G satellite RAN acceptable cell or register with PLMN. Alternatively, if the above-described conditions 1) to 4) are satisfied, the terminal should camp on a 5G satellite RAN acceptable cell and register with the PLMN.

Meanwhile, according to another embodiment, when the following conditions 1) to 4) are satisfied, the UE may camp on the cell and register it with the network.

Condition 1) When the terminal is in a limited service state, when the terminal cannot receive a normal service from the PLMN, or when the terminal cannot find a suitable cell, the terminal is an acceptable cell ( It should be camped on an acceptable cell).

Condition 2) If the MCC of the PLMN corresponding to the current location of the UE, or the country of the corresponding PLMN is not a registerable MCC or a registerable country, or a registerable PLMN, If the current location is not a registerable country, registerable MCC, or registerable PLMN,

Condition 3) If RAT type or RAN type (or RAN) is 5G satellite RAN,

Condition 4) If the cell is the only acceptable cell in the country where the UE is physically located or the MCC where the UE is physically located, or the acceptable cell of 5G satellite RAN is the country where the UE is physically located or the MCC where the UE is physically located In the case of a 5G satellite RAN acceptable cell belonging to the PLMN of the network in

The UE can or should camp on the corresponding cell. And if the above-described conditions 1) to 4) are satisfied, the UE can or must register with the corresponding PLMN.

If the terminal has to camp on an acceptable cell in a limited service state, the automatic PLMN selection method is as follows.

The order of priority of the PLMNs selected according to the automatic PLMN selection method is as follows.

First priority) condition a) the terminal is a limited service state,

Condition b) If the acceptable cell that the UE can camp on is a 5G RAN satellite acceptable cell, or the only acceptable cell that the UE can camp on is a 5G RAN satellite acceptable cell,

Condition c) Even if the PLMN to be registered by the UE is not a Home PLMN, equivalent HPLMN or recommended PLMN, or target PLMN or candidate PLMN that the UE can register as a regular service,

Condition d-1) If the corresponding PLMN is a PLMN having the only 5G satellite RAN acceptable cell that the terminal can register in the physical location, the terminal registers it as a limited service state in the corresponding PLMN.

Alternatively, condition a), condition b), and condition c) are satisfied, but even if condition d-1) is not satisfied, condition d-2) at the current physical location of the terminal, the corresponding PLMN emergency center providing emergency service Or, if there is a core network and is a PLMN having a 5G satellite RAN acceptable cell, the terminal registers it as a limited service state in the corresponding PLMN.

Second priority) If the terminal is in a limited service state, and there is a PLMN as follows, the PLMN may be selected as the second priority. In this case, the terminal may have limited service state or information about the PLMN as follows.

- Home PLMN or Equivalent HPLMN or Recommended PLMN or Target PLMN or candidate PLMN (Recommended PLMN or Target PLMN or Candidate PLMN)

- or Home PLMN, or Equivalent HPLMN, or Recommended PLMN and access technology, or Target PLMN and access technology, or candidate PLMN and access technology

The Home PLMN (HPLMN) may be an MCC of the UE IMSI and a PLMN having an MCC mapped to the MNC.

Equivalent HPLMN (EHPLMN) may be a PLMN treated as equivalent to HPLMN.

Here, the recommended PLMN or target PLMN or candidate PLMN refers to a PLMN that the UE recommends for registration and becomes a target or candidate for registration. A recommended PLMN or target PLMN or candidate PLMN is a PLMN that becomes a target or candidate for registration by recommending the UE to register in the region according to the regulatory or satellite use agreement. This may be a PLMN containing a country code (MCC) or 90x code, or 9xx code, etc., which the UE is permitted to use in the current location by regulatory, inter-country agreements, or satellite use agreements in the relevant region.

3rd priority) User controlled PLMN and access technology

4th) Operator controlled PLMN with access technology

5th priority) PLMN reported as high quality PLMN by AS

The UE may select a cell that broadcasts the corresponding PLMN and attempt to register with the selected PLMN by sending a registration request message.

PLMN broadcast by 5G satellite RAN may be as follows.

As shown in [Fig. 1b], when the satellite RAN covers several neighboring countries, the PLMN is composed of MCC and MNC, so it may be configured to include an MCC indicating a specific country and an MNC indicating a specific operator or a specific network. can For example, when A, B, and C are adjacent as in [Fig. 1b], and when satellite RAN covers countries A, B, and C as shown in [Fig. 1b], the PLMN is a specific MCC and the It can be configured by MNC. That is, for example, it may be composed of MCC A and MNC belonging to the MCC.

Meanwhile, in another embodiment, the PLMN may be configured to include an MCC starting with 90X used as a satellite MCC to indicate that it is a satellite 5G RAN, and an MNC indicating a specific operator.

Meanwhile, in another embodiment, the PLMN may be configured to include an MCC starting with 9XX used as a satellite MCC to indicate that it is a satellite 5G RAN, and an MNC indicating a specific operator.

If the UE does not find an appropriate cell in the selected PLMN, or if the UE does not have a USIM, PLMN not allowed is received from a response to a registration request, or if an illegal UE is received, an IMSI unknown in HSS response is received, or power When the saving mode is activated, the UE may receive a service in a limited service state from the selected PLMN.

In step 1411, the UE 101 transmits a registration request message to the AMF 111 to register the UE.

In step 1411 , the UE 101 transmits a registration request message to the AMF 111 . This registration request message is transmitted from the UE 101 to the AMF 111 via the 5G satellite RAN 104 .

Referring to step 1411 , if the UE has already completed registration through the initial registration process, the UE may have information on the RAT type accessible in the region.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Referring to step 1411, the UE 101 informs the AMF 111 that the UE 101 supports the satellite RAT type as the capability and access RAT type for the satellite RAN.

- The UE MM capability may include capability information on whether to support the satellite RAN of the UE. This information can be informed by using an indication called Satelite RATCapable.

- As another embodiment, capability information indicating whether the UE supports artificial satellite RAN may be transmitted through a separate information element. This information can be informed by using an indication called Satelite RATCapable.

- The 5G access type may include a 3GPP access type and a non 3GPP access type. In addition, even in the case of the 3GPP access type, the RAT type may include RAT types such as NR (general 5G NR), SAT-LEO, SAT-MEO, SAT-GEO, and SAT-Other.

- Therefore, the AMF may be informed of what capability the UE can support for the satellite RAN by using the access type and the RAT type information together or by using the RAT type information alone.

- As another embodiment, the UE may designate and inform the RAT type desired to be used during registration. This may be a RAT type requested by the UE based on the UE's subscription.

[Table 18] registration request message

[Table 19] 5G MM capability

Referring to step 1415 , when the UE 101 has already completed registration through the initial registration process, it may perform a periodic registration request.

Alternatively, according to an embodiment, the UE 101 may perform registration through an initial registration process.

The UE 101 has information on the RAT type that can be accessed in the corresponding region.

Accordingly, the UE 101 may transmit a registration request message with information of an accessible RAT type.

Accordingly, referring to step 1415 , the UE 101 may determine whether to set extended T3510 or normal T3510 for T3510 according to the RAT-type.

As another embodiment, when the RAT-type is an artificial satellite RAN, the UE 101 may configure T35xx serving as extended T3510 instead of extended T3510.

In another embodiment, the UE 101 may determine the value of T3510 based on the RAT-Type supported by the TA based on the TA information the UE recently visited based on the last visited TAI.

Referring to step 1415 , when the UE transmits a registration request message to the AMF as in step 1411 , the UE 101 sets T3510 in step 1415 . T3510 is a timer that sets start or starts while the UE 101 transmits a registration request message, and stops when the UE 101 receives a registration accept or registration reject message.

- In one embodiment, T3510 may be configured as in the case of general 5G NR.

- In another embodiment, the T3510 may be an extended timer that is assumed to use artificial satellite NR.

- Alternatively, in another embodiment, when the UE receives the extended timer value from the AMF, the T3510 may store the received extended timer value and set it using the extended timer value.

- In another embodiment, when the UE receives the timer extension possible indication from the AMF, the UE may set multiple (multiple) T3510. That is, in the case of LEO, MEO, and GEO, according to an embodiment, when the UE receives a timer extension indication, the default value of the timer may be multiplied by a timer extension possible multiple to set.

In step 1421 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 .

In step 1421 , the AMF 111 transmits a registration accept or registration reject message to the UE 101 . This registration Accept or registration reject message is transmitted from the AMF 111 to the UE 101 via the 5G satellite RAN 104 .

The registration accept message transmitted from the AMF 111 to the UE 101 in step 1421 is RAT type information accessible to the UE 101, an indication indicating whether the timer extension of the UE 101 is possible, extended priority, timer extension It may include information such as value.

[Table 20] registration Accept message

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating to set the extended timer in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value as much as the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the timer extension fixed value value may be transmitted according to a value determined by a regulation or a specification according to the RAT type of the satellite NR is LEO, MEO, GEO, or other RAT type.

- This timer extension fixed value may be delivered through an information element such as an extended T3510 value, a T3510 value, or a New Timer T35xx value. In the case of the extended T3510 value, it is a T3510 value, and if the RAT is an artificial satellite, a predetermined value may be transmitted depending on the satellite. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for the RAT that the UE camped for, that is, the RAT that the AMF camped for, that is, the RAT that the UE camped for, if the RAT type is a normal 5G RAN, it is the T3510 default value, and if the RAT type is an artificial satellite RAT, it is extended. It may be transmitted as a T3510 value.

Next, in step 1421, a registration reject message is transmitted from the AMF to the UE. That is, in step 1421, the AMF may send a registration reject message when registration is not allowed to the UE.

[Table 21] Registration reject message

Next, various embodiments of the MCC list transmitted by being included as a parameter information element in the registration reject message will be described.

in one embodiment

Case 1) The AMF informs the UE of the MCC of the current location to select and access the PLMN having the MCC corresponding to the current location. The AMF may send the MCC of the current location of the UE while sending a registration reject message to the UE.

For example, the AMF may send the MCC of the country A if the UE accesses it from the location of the country A. That is, the AMF may send an MCC list corresponding to the country of the UE location.

Upon receiving this MCC list, the UE uses it to modify the MCC of the UE's location. That is, upon receiving the MCC list, the UE selects a PLMN including the received MCC and performs registration.

Case 2) The AMF informs the UE of the candidate MCC list, that is, the recommended MCC list, or the target MCC list that the UE can access from among the countries covered by the satellite that the UE can try to register. is the case.

Alternatively, the AMF informs the UE of a target MCC list that can be used as a target in PLMN selection.

The recommended MCC list, target MCC list, or candidate MCC list may be valid in the country where the UE is physically located. That is, if the UE cannot use the corresponding MCC because it is physically far away from the recommended MCC list, target MCC list, or candidate MCC list, the recommended MCC list, target MCC list, or candidate MCC list may not be valid.

While sending a registration reject message to the UE, the AMF can send a list of nearby candidate MCCs that the UE can access or a list of target MCCs that the UE can access.

For example, the UE accessed from a location in country A, and the corresponding PLMN includes the MCC of country A, but it is not allowed in the UE's subscription to country A, or regulation or security in country A Access may not be allowed for security reasons. In this case, if access to the MCC of country B or country C is allowed as a neighboring country of country A and a neighboring country within satellite coverage, AMF sends the UE the information of the MCC, that is, the MCC list corresponding to country B or country C. can send

Upon receiving this, the UE selects a PLMN by limiting it to MCCs in the target MCC list, recommended MCC list, or candidate MCC list in PLMN selection.

Case 3) UE receives registration reject message and

In this case, the MCC that failed registration is stored in the forbidden MCC list.

That is, if the UE is not allowed to register at the current location, that is, if the UE receives a registration reject, the UE may store the MCC of the corresponding PLMN in the forbidden MCC list.

That is, the UE can save the MCC of the corresponding PLMN in the forbidden MCC list if registration is not permitted by attempting registration.

Or, in one embodiment, the AMF may send to the UE a forbidden MCC list that the UE should not register. If the AMF sends the UE a forbidden MCC list that the UE should not register, the UE can store the MCC list in the forbidden MCC list. Alternatively, the UE stores the PLMN containing the corresponding MCC in the forbidden PLMN and does not attempt to register with that PLMN.

Various embodiments of the 5G MM cause or cause transmitted by being included as a parameter information element in the registration reject message are as follows.

The registration reject message may include a 5GMM cause or cause explaining why registration was rejected.

When writing 5GMM cause information element or writing a new cause information element, the meaning and related actions of 5GMM cause or cause are as follows.

Case 1) 5GMM cause or cause# x : current location is not allowed, that is, it is a case to inform that MCC including country A in the current location is not allowed.

Case 1-1) In an embodiment, the AMF may send a 5GMM cause or cause number X to the UE to inform that the current location is not allowed to access the UE.

In Case 1-2) or such 5GMM cause or cause, the AMF informs the UE of the following. That is, it can be informed that the UE is trying to access a PLMN that is not allowed to operate at the current location of the UE.

In Case 1-3) or such 5GMM cause or cause, the AMF informs the UE of the following.

The UE may inform that any PLMN belonging to the same MCC as the home country of the selected PLMN or the selected PLMN should not be selected in the geographical location of the current UE.

Upon receiving the 5GMM cause or registration reject including the cause, the UE performs registration with the PLMN including other MCCs.

For example, when the UE selects a PLMN including an MCC for A from a location of country A and performs registration, the UE receives a registration reject message including 5GMM cause or cause #x from the AMF according to an embodiment. Then, in the registration request message sent later, the UE attempts to register with an MCC other than country A (eg, a PLMN including country B or a PLMN including country C).

Case 2) 5GMM cause or cause # y: Current PLMM not allowed.

In another embodiment, the AMF may send a 5GMM cause or cause that the access to the current PLMN is not allowed to the UE. Upon receiving a registration reject including such 5GMM cause or cause, the UE may store the corresponding PLMN in the forbidden PLMN.

Case 3) 5GMM cause or cause #z: It may indicate that the MCC in the current area is not allowed.

The UE may receive 5GMM cause or cause #z from the AMF, that is, 5GMM cause or cause indicating that registration of the UE is not permitted with the MCC of the current region.

For example, if the UE is in an area covered by country A, the MCC in the area may receive a registration reject including 5GMM cause or cause #z indicating that it is not allowed. Upon receiving such registration reject, the UE must perform registration with the PLMN including the MCC that indicates the country or region recommended by the AMF, even if it is located in the area covered by A. In this case, if a satellite satellite base station, i.e., satellite NR, exists in an area covering country A, country B, and country C, and the satellite satellite base station is shared between countries A, B, and C, the country of the UE's current location. This is to allow access to the PLMN belonging to country B or country C, even if the PLMN belonging to country A is located nearby, according to regulation or the subscription of the UE.

Case 4) 5GMM cause or cause # xx: AMF may send a 5GMM cause or cause to the UE, meaning that servicing the UE in this area is not permitted.

The UE may receive a registration reject message from the AMF. If 5GMM cause or cause #XX is received, this indicates that the PLMN does not service the UE at this location.

Therefore, upon receiving such 5GMM cause or cause, the UE learns to the UE that the PLMN attempted by the UE does not service the UE at the corresponding location, and then does not attempt to register for the PLMN or delete the PLMN. can

5GMM cause or cause # yy: This may indicate that the UE is trying to register with the wrong country.

The 5GMM cause or cause is used by the AMF to inform the UE that 'the UE is trying to register in a country other than the country in which it should attempt PLMM selection'. Upon receiving this, the UE does not attempt to register with the PLMN having the corresponding MCC.

5GMM cause or cause # zz: This is a case in which the AMF informs the UE through 5GMM cause or cause #zz so that the UE selects a PLMN located in another country.

The 5GMM cause or cause is for informing the UE to select a PLMN in another country. Upon receiving this, the UE must select a PLMN that includes an MCC other than the PLMN of the MCC to which the PLMN that the selected PLMN has attempted to register and attempt to register.

As described above, when the UE receives a registration reject from the AMF, in step 1425, the UE may operate as follows.

Case 1) UE can delete the corresponding PLMM (delete)

In this embodiment, when the UE receives a 5GMM cause or registration reject including a cause, the UE deletes the PLMN to which the UE has attempted to access from the list of PLMNs that the UE can access. If there is no PLMN in the accessible PLMN list, the UE changes the state of the UE to a limited service state.

Case 2) The UE can store the corresponding PLMN and use it for the next registration request (store). For example, it can store the received PLMN or the received MCC. Alternatively, the received MCC list can be stored. Alternatively, the received MCC list may be stored, and the corresponding MCC list may be used to select a PLMN including the corresponding MCC list during PLMN selection. Alternatively, the PLMN including the received MCC list may be stored in the candidate PLMN or stored in the current location allowed PLMN.

In this case, according to an embodiment, the AMF transmits MCC list information that the UE can access in the corresponding area to the UE, or the AMF gives the UE information to access the UE using the MCC of the current location.

Accordingly, in this case, when the UE receives an accessible MCC list, it may select a PLMN list including the corresponding MCC from the PLMN list, and may attempt registration by sending a registration request to the reselected PLMN.

Case 3 ) The UE may replace the previous PLMN with the corresponding PLMN information.

Case 4) The UE may additionally store the corresponding PLMN in addition to the previously received information.

Hereinafter, other parameter information elements included in registration reject are as follows.

- The UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element that AMF (Network) informs the UE, that is, a parameter. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- The indication indicating whether the timer extension of the UE is possible is an indication indicating that the extended timer is set in the timer set by the UE in the case of an artificial satellite RAT.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

- The timer extension value may be set by multiplying the default value of the timer by the timer extension value when the UE receives the timer extension value from the network in setting the timer of the message transmitted by the UE to the AMF. That is, in the case of LEO, MEO, and GEO, according to an embodiment, the default value of the timer may be set by multiplying the timer extension possible multiple.

- The timer extension fixed value indicates by setting a value to set the timer according to the RAT type to which the UE connects when setting the timer for the message transmitted by the UE to the AMF. In the case of such a timer extension fixed value, the RAT type of the satellite NR may transmit a timer extension fixed value value according to a value determined by a regulation or a specification according to the LEO, MEO, GEO, or other RAT type.

- This timer extension fixed value may be delivered through an information element such as an extended T3510 value, a T3510 value, or a New Timer T35xx value. In the case of the extended T3510 value, it is a T3510 value, and if the RAT is an artificial satellite, a predetermined value may be transmitted depending on the satellite. It can be transmitted in multiples of 3, or it can be transmitted in the form of an artificial satellite timer by defining an artificial satellite timer. Or, for the RAT that the UE camped for, that is, the RAT that the AMF camped for, that is, the RAT that the UE camped for, if the RAT type is a normal 5G RAN, it is the T3510 default value, and if the RAT type is an artificial satellite RAT, it is extended. It may be transmitted as a T3510 value.

As shown in step 1425, when the UE 101 receives a registration accept or registration reject message from the AMF 111, the UE 101 stops T3510.

15 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

15 illustrates an operation when the AMF sends a deregistration request message to the UE.

In step 1521, the UE is performing communication with a network entity such as AMF.

The following is a case in which a deregistration request message is transmitted from the AMF to the UE in step 1523. That is, in step 1523, when deregistration is required for the UE, the AMF may send a deregistration request message. The deregistration request message is a message transmitted by the AMF to notify the UE that the UE has been deregistrated.

[Table 22] deregistration request message

In the following, various embodiments of the MCC list transmitted by being included as a parameter information element in the deregistration request message will be described.

in one embodiment

Case 1) The AMF informs the UE of the MCC of the current location to select and access the PLMN having the MCC corresponding to the current location.

The AMF may send the MCC of the current location of the UE while sending a deregistration request message to the UE.

For example, if the UE accesses from the location of country A, it can send the MCC of country A. That is, it is possible to send an MCC list corresponding to the country of the UE location.

Upon receiving this MCC list, the UE uses it to modify the MCC of the UE's location. That is, when the UE receives this MCC list, the UE selects a PLMN including the received MCC and performs registration.

Case 2) When the AMF informs the UE of the candidate MCC list that the UE can access, that is, the recommended MCC list, or the target MCC list among the countries covered by the satellite that the UE can try to register. to be.

Alternatively, the AMF informs the UE of the target MCC list that can be used as a target in PLMN selection.

The recommended MCC list, target MCC list, or candidate MCC list may be valid in the country where the UE is physically located. That is, if the UE cannot use the corresponding MCC because it is physically far away from the recommended MCC list, target MCC list, or candidate MCC list, the recommended MCC list, target MCC list, or candidate MCC list may not be valid.

AMF can send a list of candidate MCCs that the UE can access or a list of target MCCs that the UE can access while sending a deregistration request message to the UE.

For example, the UE accessed from a location in country A, and the corresponding PLMN includes the MCC of country A, but it is not allowed in the UE's subscription to country A, or there is no regulation or security in country A. Access may not be allowed for security reasons. In this case, if access to the MCC of country B or country C is allowed as a neighboring country of country A and a neighboring country within satellite coverage, AMF will send the information of the MCC to the UE, that is, the MCC list corresponding to country B or country C. can

Upon receiving this, the UE selects a PLMN by limiting it to MCCs in the target MCC list, recommended MCC list, or candidate MCC list in PLMN selection.

Case 3) UE receives deregistration request message and

In this case, the MCC that failed registration is stored in the forbidden MCC list.

That is, if the UE is not allowed to register at the current location, that is, if the UE receives a deregistration request message, the UE may store the MCC of the corresponding PLMN in the forbidden MCC list.

That is, when the UE receives the deregistration request message, the MCC of the corresponding PLMN can be stored in the forbidden MCC list.

Or, in one embodiment, the AMF may send to the UE a forbidden MCC list that the UE should not register. If the AMF sends the UE a forbidden MCC list that the UE should not register, the UE can store the MCC list in the forbidden MCC list. Alternatively, the UE stores the PLMN containing the corresponding MCC in the forbidden PLMN and does not attempt to register with that PLMN.

Several embodiments of 5GMM cause or cause transmitted by being included as a parameter information element in the deregistration request message are as follows.

When writing 5GMM cause information element or writing a new cause information element, the meaning and related actions of 5GMM cause or cause are as follows.

The deregistration request message may include 5GMM cause or cause explaining why the deregistration request was made.

Case 1) 5GMM cause or cause # x : current location is not allowed, that is, it is a case to inform that MCC including country A in the current location is not allowed.

Case 1-1) In an embodiment, the AMF may send a 5GMM cause or cause number X to the UE to inform that the current location is not allowed to access the UE.

In Case 1-2) or such 5GMM cause or cause, the AMF informs the UE of the following. That is, it can be informed that the UE is trying to access a PLMN that is not permitted to operate at the current location of the UE.

In Case 1-3) or such 5GMM cause or cause, the AMF informs the UE of the following.

The UE may inform that any PLMN belonging to the same MCC as the home country of the selected PLMN or the selected PLMN should not be selected in the geographical location of the current UE.

Upon receiving the 5GMM cause or deregistration request message including the cause, the UE performs registration with the PLMN including other MCCs.

For example, when the UE selects a PLMN including an MCC for A from a location of country A and performs registration, the UE receives a registration reject message including 5GMM cause or cause #x from the AMF according to an embodiment. Then, in the registration request message sent later, the UE attempts to register for another MCC (eg, a PLMN including country B or a PLMN including country C) other than country A in the subsequent registration request message.

Case 2) 5GMM cause or cause # y: Current PLMM not allowed.

In another embodiment, the AMF may send a 5GMM cause or cause that the access to the current PLMN is not allowed to the UE. Upon receiving a registration reject including such 5GMM cause or cause, the UE may store the corresponding PLMN in the forbidden PLMN.

Case 3) 5GMM cause or cause #z: It may indicate that the MCC in the current area is not allowed.

The UE may receive 5GMM cause or cause #z from the AMF, that is, 5GMM cause or cause indicating that registration of the UE is not permitted with the MCC of the current region.

For example, if the UE is in an area covered by country A, the MCC in the area may receive a registration reject including 5GMM cause or cause #z indicating that it is not allowed. Upon receiving such registration reject, the UE must perform registration with the PLMN including the MCC that indicates the country or region recommended by the AMF, even if it is located in the area covered by A. In this case, if a satellite satellite base station, i.e., satellite NR, exists in an area covering country A, country B, and country C, and the satellite satellite station is shared between countries A, B, and C, it is located in country A on the UE's current location. This is to allow access to the PLMN belonging to country B or country C, even if the PLMN to which it belongs is located nearby, according to regulation or the subscription of the UE.

Case 4) 5GMM cause or cause # xx: AMF may send a 5GMM cause or cause to the UE, meaning that servicing the UE in this area is not permitted.

The UE may receive a deregistration request message from the AMF. When 5GMM cause or cause #XX is received, this indicates that the PLMN does not service the UE at this location.

Therefore, upon receiving such 5GMM cause or cause, the UE knows to the UE that the PLMN attempted by the UE does not service the UE at the corresponding location, and then does not attempt to register for the PLMN or delete the PLMN. can

5GMM cause or cause # yy: Indicates that the UE attempted to register in the wrong country.

The 5GMM cause or cause is used by the AMF to inform the UE that 'the UE is trying to register in a country other than the country in which it should attempt PLMM selection'. Upon receiving this, the UE does not attempt to register with the PLMN having the corresponding MCC.

5GMM cause or cause # zz: This is a case in which the AMF informs the UE through 5GMM cause or cause #zz so that the UE selects a PLMN located in another country.

The 5GMM cause or cause is for informing the UE to select a PLMN in another country. Upon receiving this, the UE must select a PLMN that includes an MCC other than the PLMN of the MCC to which the PLMN that the selected PLMN has attempted to register and attempt to register.

As described above, when the UE receives the deregistration request message from the AMF, in step 1525, the UE may operate as follows.

Case 1) UE can delete the corresponding PLMM (delete)

In this embodiment, when the UE receives a 5GMM cause or a deregistration request message including a cause, the UE deletes the PLMN to which the UE has attempted to access from the PLMN list accessible to the UE.

Case 2) The UE can store the corresponding PLMN and use it for the next registration request (store). For example, it can store the received PLMN or the received MCC. Alternatively, the received MCC list can be stored. Alternatively, the received MCC list may be stored, and the corresponding MCC list may be used to select a PLMN including the corresponding MCC list during PLMN selection. Alternatively, the PLMN including the received MCC list may be stored in the candidate PLMN or stored in the current location allowed PLMN.

In this case, according to an embodiment, the AMF transmits MCC list information that the UE can access in the corresponding area to the UE, or the AMF gives the UE information to access the UE using the MCC of the current location.

Accordingly, in this case, when the UE receives an accessible MCC list, it may select a PLMN list including the corresponding MCC from the PLMN list, and may attempt registration by sending a registration request to the reselected PLMN.

Case 3 ) The UE may replace the previous PLMN with the corresponding PLMN information.

Case 4) The UE may additionally store the corresponding PLMN in addition to the previously received information.

Hereinafter, other parameter information elements included in the deregistration request message are as follows.

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

16 is a flowchart illustrating a procedure for supporting communication in a system supporting 5G wireless communication and artificial satellite according to an embodiment of the present disclosure.

16 illustrates an operation when the AMF sends a service reject message to the UE.

In step 1621, the UE transmits a service request message to the AMF.

In step 1623, a service reject message is transmitted from the AMF to the UE. That is, in step 1623, the AMF may transmit a service reject message to the UE to notify that the service request requested by the UE is rejected.

[Table 23] service reject message

Next, various embodiments of the MCC list transmitted by being included as a parameter information element in the service reject message will be described.

in one embodiment

Case 1) The AMF informs the UE of the MCC of the current location to select and access the PLMN having the MCC corresponding to the current location.

The AMF may send the MCC of the current location of the UE while sending a service reject message to the UE.

For example, the AMF may send the MCC of the country A if the UE accesses it from the location of the country A. That is, the AMF may send an MCC list corresponding to the country of the UE location.

Upon receiving this MCC list, the UE uses it to modify the MCC of the UE's location. That is, upon receiving the MCC list, the UE selects a PLMN including the received MCC and performs registration.

Case 2) When the AMF informs the UE of the candidate MCC list that the UE can access, that is, the recommended MCC list, or the target MCC list among the countries covered by the satellite that the UE can try to register. to be.

Alternatively, the AMF informs the UE of the target MCC list that can be used as a target in PLMN selection.

The recommended MCC list, target MCC list, or candidate MCC list may be valid in a country where the UE is physically located. That is, if the UE cannot use the corresponding MCC because it is physically far away from the recommended MCC list, target MCC list, or candidate MCC list, the recommended MCC list, target MCC list, or candidate MCC list may or may not be valid.

AMF can send a list of candidate MCCs that the UE can access or a list of target MCCs that the UE can access while sending a service reject message to the UE.

For example, the UE accessed from a location in country A, and the corresponding PLMN includes the MCC of country A, but it is not allowed in the UE's subscription to country A, or there is no regulation or security in country A. Access may not be allowed for security reasons. In this case, if access to the MCC of country B or country C is allowed as a neighboring country of country A and a neighboring country within satellite coverage, AMF will send the information of the MCC to the UE, that is, the MCC list corresponding to country B or country C. can

Upon receiving this, the UE selects a PLMN by limiting it to MCCs in the target MCC list, recommended MCC list, or candidate MCC list in PLMN selection.

Case 3) The UE receives a service reject message and

In this case, the MCC that failed registration is stored in the forbidden MCC list.

That is, if the UE is not allowed to register at the current location, that is, if the UE receives a service reject message, the UE may store the MCC of the corresponding PLMN in the forbidden MCC list.

That is, when the UE receives the service reject message, the MCC of the corresponding PLMN may be stored in the forbidden MCC list.

Or, in one embodiment, the AMF may send to the UE a forbidden MCC list that the UE should not register. If the AMF sends the UE a forbidden MCC list that the UE should not register, the UE can store the MCC list in the forbidden MCC list. Alternatively, the UE stores the PLMN containing the corresponding MCC in the forbidden PLMN and does not attempt to register with that PLMN.

Various embodiments of 5GMM cause or cause transmitted by being included as a parameter information element in the service reject message are as follows.

When writing 5GMM cause information element or writing a new cause information element, the meaning and related actions of 5GMM cause or cause are as follows.

Meanwhile, the service reject message may include a 5GMM cause or cause explaining why the service was rejected.

Case 1) 5GMM cause or cause # x : current location is not allowed, that is, it is a case to inform that MCC including country A in the current location is not allowed.

Case 1-1) In an embodiment, the AMF may send a 5GMM cause or cause number X to the UE to inform that the current location is not allowed to access the UE.

In Case 1-2) or such 5GMM cause or cause, the AMF informs the UE of the following. That is, it can be informed that the UE is trying to access a PLMN that is not permitted to operate at the current location of the UE.

In Case 1-3) or such 5GMM cause or cause, the AMF informs the UE of the following.

The UE may inform the fact that any PLMN belonging to the same MCC as the home country of the selected PLMN or the selected PLMN should not be selected in the geographical location of the current UE.

Upon receiving the 5GMM cause or service reject message including the cause, the UE performs registration with the PLMN including other MCCs.

For example, when the UE selects a PLMN including an MCC for A from a location of country A and performs registration, according to an embodiment, the UE receives a registration reject message including 5GMM cause or cause #x from the AMF. Then, in the registration request message sent later, the UE attempts to register with an MCC other than country A (eg, a PLMN including country B or a PLMN including country C).

Case 2) 5GMM cause or cause # y: Current PLMM not allowed.

In another embodiment, the AMF may send a 5GMM cause or cause that the access to the current PLMN is not allowed to the UE. Upon receiving a registration reject including such 5GMM cause or cause, the UE may store the corresponding PLMN in the forbidden PLMN.

Case 3) 5GMM cause or cause #z: It may indicate that the MCC in the current area is not allowed.

The UE may receive 5GMM cause or cause #z from the AMF, that is, 5GMM cause or cause indicating that registration of the UE is not permitted with the MCC of the current region.

For example, if the UE is in an area covered by country A, the MCC in the area may receive a registration reject including 5GMM cause or cause #z indicating that it is not allowed. Upon receiving such registration reject, the UE must perform registration with the PLMN including the MCC that indicates the country or region recommended by the AMF, even if it is located in the area covered by A. In this case, if a satellite satellite base station, i.e., satellite NR, exists in an area covering country A, country B, and country C, and the satellite satellite station is shared between countries A, B, and C, it is located in country A on the UE's current location. This is to allow access to the PLMN belonging to country B or country C, even if the PLMN to which it belongs is located nearby, according to the regulation or the subscription of the UE.

Case 4) 5GMM cause or cause # xx: AMF may send a 5GMM cause or cause to the UE, meaning that servicing the UE in this area is not permitted.

The UE may receive a service reject message from the AMF. If 5GMM cause or cause #XX is received, this indicates that the PLMN does not service the UE at this location.

Therefore, upon receiving such 5GMM cause or cause, the UE knows to the UE that the PLMN attempted by the UE does not service the UE at the corresponding location, and then does not attempt to register for the PLMN or delete the PLMN. can

5GMM cause or cause # yy: Indicates that the UE attempted to register in the wrong country.

The 5GMM cause or cause is used by the AMF to inform the UE that 'the UE is trying to register in a country other than the country in which it should attempt PLMM selection'. Upon receiving this, the UE does not attempt to register with the PLMN having the corresponding MCC.

5GMM cause or cause # zz: This is a case in which the AMF informs the UE through 5GMM cause or cause #zz so that the UE selects a PLMN located in another country.

The 5GMM cause or cause is for informing the UE to select a PLMN in another country. Upon receiving this, the UE must select a PLMN that contains an MCC other than the PLMN of the MCC to which the PLMN that the selected PLMN has attempted to register and attempt to register.

As described above, when the UE receives the service reject message from the AMF, in step 1625, the UE may operate as follows.

Case 1) UE can delete the corresponding PLMM (delete)

In this embodiment, when the UE receives a 5GMM cause or a service reject message including a cause, the UE deletes the PLMN to which the UE has attempted to access from the PLMN list accessible to the UE.

Case 2) The UE stores the corresponding PLMN and can use it for the next registration request or service request. (store)

For example, the received PLMN or the received MCC may be stored. Alternatively, the received MCC list can be stored. Alternatively, the received MCC list may be stored, and the corresponding MCC list may be used to select a PLMN including the corresponding MCC list during PLMN selection. Alternatively, the PLMN including the received MCC list may be stored in the candidate PLMN or stored in the current location allowed PLMN.

In this case, according to an embodiment, the AMF transmits MCC list information that the UE can access in the corresponding area, or the AMF gives the UE information to access the UE using the MCC of the current location.

Accordingly, in this case, when the UE receives an accessible MCC list, it may select a PLMN list including the corresponding MCC from the PLMN list, and may attempt registration by sending a registration request to the reselected PLMN.

Case 3 ) The UE may replace the previous PLMN with the corresponding PLMN information.

Case 4) The UE may additionally store the corresponding PLMN in addition to the previously received information.

Hereinafter, other parameter information elements included in the service reject message are as follows.

- A UE access allowable RAT type information element (UE access allowable RAT type information element) is an information element, ie, a parameter, that AMF (Network) informs the UE. This “information on the RAT type that the UE can access” is for the AMF to inform the UE of “information on the RAT type allowed for the UE”. That is, the information that the AMF informs the UE may include the following items. 1) Notifying the RAT type supported by the network, 2) The network is capable of providing a service to the UE from among “RAT types (lists) supported by the UE”, which is information that the UE informs the network through the capability information of the UE. RAT type, and 3) RAT type information indicating that AMF can support the UE based on subscription information of the UE, etc.

We can provide you with such information.

- When the UE receives the accessible RAT type information, the UE stores the accessible RAT type information, and then uses the information to perform registration when transmitting a registration request message. The UE may perform a function such as PLMN selection by selecting an accessible PLMN or RAT type during registration.

- RAT priority (extended priority) is the UE's subscription, regional/national regulation/regulation, regional characteristics (sea, area without base station) when the RAT accessible to the UE is 5G NR, satellite NR, etc. Priority is given to RATs to which the UE can access according to the priority.

In the specific embodiments of the present disclosure described above, components included in the disclosure are expressed in the singular or plural according to the specific embodiments presented. However, the singular or plural expression is appropriately selected for the context presented for convenience of description, and the present disclosure is not limited to the singular or plural element, and even if the element is expressed in plural, it is composed of the singular or singular. Even an expressed component may be composed of a plurality of components.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments and should be defined by the claims described below as well as the claims and equivalents.

Claims (1)

A method for supporting communication using an artificial satellite in a wireless communication system, the method comprising:
transmitting, by the terminal, a registration request message to an Access and Mobility Management Function (AMF); and
Comprising the step of the terminal receiving a registration acceptance message or a registration rejection message from the AMF,
The registration request message includes information on whether the terminal supports an artificial satellite RAN (Radio Access Network),
The registration response message includes information on a RAT type for the UE to access the satellite RAN and a timer value related to transmission of the registration message.

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