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WO2025211840A1 - Procédé et appareil d'authentification pour communication par satellite dans un mode de stockage et de réacheminement - Google Patents

Procédé et appareil d'authentification pour communication par satellite dans un mode de stockage et de réacheminement

Info

Publication number
WO2025211840A1
WO2025211840A1 PCT/KR2025/004538 KR2025004538W WO2025211840A1 WO 2025211840 A1 WO2025211840 A1 WO 2025211840A1 KR 2025004538 W KR2025004538 W KR 2025004538W WO 2025211840 A1 WO2025211840 A1 WO 2025211840A1
Authority
WO
WIPO (PCT)
Prior art keywords
satellite
satellite device
request message
sat
sig
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2025/004538
Other languages
English (en)
Korean (ko)
Inventor
임태형
최홍진
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020240110025A external-priority patent/KR20250148355A/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of WO2025211840A1 publication Critical patent/WO2025211840A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present disclosure relates to a method and device for enabling authentication in a wireless communication system using a satellite as a component when the communication system operates in a store and forward mode.
  • 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and can be implemented not only in the sub-6GHz frequency band such as 3.5 gigahertz (3.5GHz), but also in the ultra-high frequency band called millimeter wave (mmWave) such as 28GHz and 39GHz ('Above 6GHz').
  • mmWave millimeter wave
  • mmWave millimeter wave
  • mmWave millimeter wave
  • 'Above 6GHz' millimeter wave
  • 6G mobile communication technology which is called the system after 5G communication (Beyond 5G)
  • implementation in the terahertz band for example, the 3 terahertz (3THz) band at 95GHz
  • 3THz the 3 terahertz
  • eMBB enhanced Mobile Broadband
  • URLLC Ultra-Reliable Low-Latency Communications
  • mMTC massive Machine-Type Communications
  • beamforming and massive MIMO to mitigate path loss of radio waves in ultra-high frequency bands and increase the transmission distance of radio waves
  • numerologies such as operation of multiple subcarrier intervals
  • dynamic operation of slot formats for efficient use of ultra-high frequency resources
  • initial access technology to support multi-beam transmission and wideband
  • definition and operation of BWP Bitth Part
  • new channel coding methods such as LDPC (Low Density Parity Check) codes for large-capacity data transmission and Polar Code for reliable transmission of control information
  • L2 pre-processing L2 pre-processing
  • Standardization is also in progress for system architecture/services such as 5G baseline architecture (e.g., Service-based Architecture, Service-based Interface) for grafting Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) that provides services based on the location of the terminal.
  • 5G baseline architecture e.g., Service-based Architecture, Service-based Interface
  • NFV Network Functions Virtualization
  • SDN Software-Defined Networking
  • MEC Mobile Edge Computing
  • the development of these 5G mobile communication systems includes new waveforms to ensure coverage in the terahertz band of 6G mobile communication technology, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), Array Antenna, and Large Scale Antenna, metamaterial-based lenses and antennas to improve the coverage of terahertz band signals, high-dimensional spatial multiplexing technology using Orbital Angular Momentum (OAM), Reconfigurable Intelligent Surface (RIS) technology, as well as full duplex technology to improve the frequency efficiency and system network of 6G mobile communication technology, satellite, AI (Artificial Intelligence) from the design stage and AI-based communication technology that realizes system optimization by internalizing end-to-end AI support functions, and ultra-high-performance communication and computing resources to provide services with complexity that exceeds the limits of terminal computing capabilities. It can serve as a basis for the development of next-generation distributed computing technologies that can be realized by utilizing them.
  • FD-MIMO Full Dimensional MIMO
  • Array Antenna and
  • a method of operating a UE (user equipment) (100) in a communication system may include: transmitting a first attach request message to a satellite device (200) through a service link; receiving retry information (retry info) indicating at least one of a reconnection time, a reconnection method, or a reconnection target from the satellite device (200) through the service link; and transmitting a second attach request message to the satellite device (200) based on the retry information.
  • retry info indicating at least one of a reconnection time, a reconnection method, or a reconnection target from the satellite device (200) through the service link
  • transmitting a second attach request message to the satellite device (200) based on the retry information.
  • the first connection request message may be transmitted in response to a first S&F indication received from the satellite device (200).
  • the first S&F indication may be a parameter indicating that the satellite device (200) supports a store and forward mode.
  • the first connection request message may include a second S&F indicator, which is a parameter indicating that the UE (100) supports store and forward mode.
  • the first connection request message may include an identifier (UE.ID) of the UE (100) and a signature (UE.Sig) generated by the UE (100).
  • UE.ID an identifier of the UE (100)
  • UE.Sig a signature generated by the UE (100).
  • the first connection request message may include an identifier (UE.ID) of the UE (100) and a signature (UE.Sig) generated by the UE (100).
  • UE.ID an identifier of the UE (100)
  • UE.Sig a signature generated by the UE (100).
  • the signature (SAT.Sig) generated by the satellite device (200) can be generated based on a random value (UE.RN) generated by the UE (100).
  • the above method of operation may include a step of verifying the validity of a signature (UE.Sig) generated by the UE (100).
  • UE.Sig a signature generated by the UE (100).
  • the above method of operation may include a step of completing authentication for the UE (100) when the validity is verified.
  • FIG. 1 is a conceptual diagram illustrating two different modes of satellite communication in a communication system according to an embodiment of the present disclosure.
  • FIG. 11 is a block diagram illustrating a UE (100) in a communication system according to an embodiment of the present disclosure.
  • FIG. 13 is a block diagram illustrating a GN device (300) in a communication system according to an embodiment of the present disclosure.
  • each block of the processing flowchart drawings and combinations of the flowchart drawings can be performed by computer program instructions.
  • These computer program instructions can be installed in a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing equipment, so that the instructions executed by the processor of the computer or other programmable data processing equipment create a means for performing the functions described in the flowchart block(s).
  • These computer program instructions can also be stored in a computer-available or computer-readable memory that can direct a computer or other programmable data processing equipment to implement the functions in a specific manner, so that the instructions stored in the computer-available or computer-readable memory can also produce a manufactured item that includes an instruction means for performing the functions described in the flowchart block(s).
  • the computer program instructions may be installed on a computer or other programmable data processing device, a series of operational steps may be performed on the computer or other programmable data processing device to create a computer-executable process, and the instructions that cause the computer or other programmable data processing device to perform the steps for performing the functions described in the flowchart block(s) may also provide steps for performing the functions described in the flowchart block(s).
  • the term ' ⁇ unit' used in various embodiments of the present disclosure means a software or hardware component such as an FPGA or ASIC, and the ' ⁇ unit' can perform certain roles.
  • the ' ⁇ unit' is not limited to software or hardware.
  • the ' ⁇ unit' may be configured to be on an addressable storage medium and may be configured to play one or more processors.
  • the ' ⁇ unit' may include components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.
  • HXRES Haash eXpected RESponse
  • step 9 one or more of the following processes may be performed:
  • - UE (100) can transmit RES to SEAF (700).
  • step 10 one or more of the following processes may be performed:
  • step 11 one or more of the following processes may be performed:
  • step 12 one or more of the following processes may be performed:
  • the UE (100) illustrated in FIG. 7 may be the UE (100) illustrated in FIG. 6.
  • the satellite (200) illustrated in FIG. 7 may include a part and/or the entirety of the SEAF (700) disclosed in FIG. 6.
  • the satellite (200) illustrated in FIG. 7 may include a part and/or the entirety of the ASUF (800) disclosed in FIG. 6.
  • the GN (300) illustrated in FIG. 7 may include a part and/or the entirety of the SEAF (700) disclosed in FIG. 6.
  • the GN (300) illustrated in FIG. 7 may include a part and/or the entirety of the AUSF (800) disclosed in FIG. 6.
  • the GN (300) illustrated in FIG. 7 may include the UDM (900) illustrated in FIG. 6.
  • the authentication process disclosed in FIG. 7 may be a modified process for satellite communication in storage and transmission mode based on the authentication process disclosed in FIG. 6.
  • the modified process may be as follows.
  • STEP 1 is collectively referred to as the Attach Request Procedure, and a detailed description of the process will be provided in FIGS. 8 to 10. Below, only a brief description of STEP 1 is provided.
  • the UE (100) can transmit an Attach Request message to the satellite (200). At this time, since the feeder link is not available, authentication between the terminal (100) and the network cannot be completed immediately. In this case, the UE (100) can wait until STEP 3, which will be described later, and then attempt an attachment request again in step 3.
  • the satellite (200) may transmit retry information (Retry Info) to the UE (100).
  • the retry information may include one or more of the following information. For a more detailed description of the information listed below, refer to the disclosures of FIGS. 8 to 10.
  • ⁇ Reconnection method Information on how reconnection will be triggered.
  • ⁇ Reconnection target Information on the satellite(s) (200) that will be the target of the request when requesting reconnection.
  • step 1 one or more of the following processes may be performed:
  • step 2 of Fig. 6 A process corresponding to step 2 of Fig. 6 can be performed.
  • step 2 one or more of the following processes may be performed:
  • the satellite (200) of STEP 3 may be a satellite (200) belonging to the reconnection target list initiated in STEP 1. Therefore, the satellite (200) of STEP 3 and the satellite (200) of STEP 1 may be the same satellite or different satellites.
  • the satellite (200) can transmit retry information (Retry Info) to the UE (100).
  • Retry Info retry information
  • Step 1 of FIG. 9 may be performed before step 3 of FIG. 7 is executed.
  • step 9 of FIG. 6 and step 4 of FIG. 9 can be combined as follows: UE (100) can transmit the message described in step 9 of FIG. 6 to satellite (200). UE (100) can further transmit the message described in step 4 of FIG. 9 to satellite (200). At this time, M used for generating UE.Sig among the messages described in step 4 of FIG. 9 can further include the message described in step 9 of FIG. 6.
  • FIG. 10 is a flowchart illustrating a connection request process disclosed as part of FIG. 5 or FIG. 6 to FIG. 7 in a communication system according to an embodiment of the present disclosure.
  • FIG. 10 may be a process corresponding to the attach request procedure of FIG. 5 or FIG. 7.
  • the definitions of the UE (100) and the satellite (200) may follow the definitions disclosed in FIG. 5 and FIG. 7.
  • connection request process of Fig. 10 may be as follows.
  • step 1 one or more of the following processes may be performed:
  • - Satellite (200) can transmit S&F indication to UE (100).
  • step 2 one or more of the following processes may be performed:
  • - UE (100) can transmit an S&F indication to a satellite (200).
  • the UE.ID may be the ID of the UE (100). (The ID is an ID for performing the process disclosed in FIGS. 2 and 3, and any form/type of ID may be used as long as the purpose can be technically achieved.)
  • the UE.Sig may be an electronic signature generated by the UE (100).
  • the UE.Sig may be an electronic signature generated through the process disclosed in FIG. 3.
  • the ID used by the UE (100) is UE.ID
  • the M used by the UE (100) may be any information that can prevent a replay attack.
  • a possible M may be one of the examples presented below.
  • ⁇ M may be current time information.
  • various verification mechanisms utilizing it may be used.
  • a UE (100), which is a signer (1200) may generate an electronic signature using current time information
  • a satellite (200), which is a verifier (1300) may verify whether the received time information is acceptable within a specific error range.
  • the M used by the UE (100) may further include any message transmitted by the UE (100).
  • the M used by the UE (100) may further include an S&F indication.
  • the satellite (200) can authenticate the UE (100) by verifying the validity of the received UE.Sig.
  • the validity verification may include verification of whether the value of the signed message included in the electronic signature is correct.
  • the validity verification may include verification of whether the content of the message that is the target of the signature is acceptable.
  • the method for verifying the validity of the signed message may follow the process of FIG. 3.
  • step 3 one or more of the following processes may be performed:
  • the satellite (200) can transmit retry information (Retry Info) to the UE (100).
  • Retry Info retry information
  • the satellite (200) can transmit SAT.ID and SAT.Sig to the UE (100).
  • the SAT.ID may be an ID of the satellite (Satellite). (The ID is an ID for performing the process disclosed in FIGS. 2 and 3, and any form/type of ID may be used as long as the purpose can be technically achieved.)
  • the SAT.Sig may be an electronic signature generated by the satellite (Satellite) (200).
  • the SAT.Sig may be an electronic signature generated through the process disclosed in FIG. 3.
  • the ID used by the satellite (Satellite) (200) is SAT.ID
  • the M used by the satellite (Satellite) (200) may be any information that can prevent a replay attack.
  • a possible M may be one of the examples presented below.
  • ⁇ M may be current time information.
  • various verification mechanisms utilizing it may be used.
  • a satellite (200) which is a signer (1200)
  • a UE (100) which is a verifier (1300)
  • the M used by the satellite (200) may further include any message transmitted by the satellite (200).
  • the M used by the satellite (200) may further include Retry Info.
  • the UE (100) can authenticate the satellite (200) by verifying the validity of the received SAT.Sig.
  • the validity verification may include verification of whether the value of the signed message included in the electronic signature is correct.
  • the validity verification may include verification of whether the content of the message that is the target of the signature is acceptable.
  • the method for verifying the validity of the signed message may follow the process of FIG. 3.
  • Step 5 of FIG. 5 and Step 3 of FIG. 10 can be combined as follows:
  • the satellite (200) can transmit the message described in Step 5 of FIG. 5 to the UE (100).
  • the satellite (200) can further transmit the message described in Step 3 of FIG. 10 to the UE (100).
  • M used for generating SAT.Sig can further include the message described in Step 5 of FIG. 5.
  • Step 1 of FIG. 10 may be performed before step 3 of FIG. 7 is executed.
  • Step 3 of FIG. 7 and Step 2 of FIG. 10 can be combined as follows: UE (100) can transmit the message described in Step 3 of FIG. 7 to Satellite (200). UE (100) can further transmit the message described in Step 2 of FIG. 10 to Satellite (200). At this time, M, which is used for generating UE.Sig among the messages described in Step 2 of FIG. 10, can further include the message described in Step 3 of FIG. 7.
  • step 7 of FIG. 6 and step 3 of FIG. 10 can be combined as follows:
  • the satellite (200) can transmit the message described in step 7 of FIG. 6 to the UE (100).
  • the satellite (200) can further transmit the message described in step 3 of FIG. 10 to the UE (100).
  • M used for generating SAT.Sig can further include the message described in step 7 of FIG. 6.
  • FIG. 11 is a block diagram illustrating a UE (100) in a communication system according to an embodiment of the present disclosure.
  • the processor (110) can control the overall operation of the UE (100) to perform operations according to one or a combination of two or more of the embodiments of FIGS. 1 to 10 described above.
  • the processor (110), the transceiver (120), and the memory (130) do not necessarily have to be implemented as separate modules, and of course, they can be implemented in the form of a single chip.
  • the processor (110) and the transceiver (120) can be electrically connected.
  • the processor (110) can be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.
  • the transceiver (120) can include a communication interface for transmitting and receiving signals with other network entities via wired/wireless.
  • the memory (130) can store data such as a basic program, an application program, and setting information for the operation of the UE (100).
  • the memory (130) provides the stored data upon request of the processor (110).
  • the memory (130) can be configured as a storage medium or a combination of storage media such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD.
  • the processor (110) can perform at least one of the above-described embodiments based on a program for performing an operation according to at least one of the above-described embodiments of the present disclosure stored in the memory (130).
  • the program may be stored in an attachable storage device that is accessible via a communication network such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof.
  • a storage device may be connected to a device performing an embodiment of the present disclosure via an external port.
  • a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.
  • FIG. 12 is a block diagram illustrating a satellite device (200) in a communication system according to an embodiment of the present disclosure.
  • the satellite device (200) may include a processor (210) for controlling the overall operation of the satellite device (200), a transceiver (220) including a transmitter and a receiver, and a memory (230) according to one or a combination of two or more of the embodiments of FIGS. 1 to 10.
  • the present invention is not limited to the above example, and the satellite device (200) may include more or fewer components than the components illustrated in FIG. 12.
  • the transceiver (230) may transmit and receive signals with at least one of other network entities or terminals.
  • the signals transmitted and received with at least one of other network entities or terminals may include at least one of control information and data.
  • the processor (210) may control the overall operation of the satellite device (200) to perform operations according to one or a combination of two or more of the embodiments of FIGS. 1 to 10 described above.
  • the processor (210), the transceiver (220), and the memory (230) do not necessarily have to be implemented as separate modules, and may of course be implemented in the form of a single chip.
  • the processor (210) and the transceiver (220) may be electrically connected.
  • the processor (210) may be an Application Processor (AP), a Communication Processor (CP), a circuit, an application-specific circuit, or at least one processor.
  • the transceiver (220) may include a communication interface for transmitting and receiving signals with other network entities via wired/wireless.
  • the memory (230) can store data such as a basic program, an application program, and setting information for the operation of the satellite device (200).
  • the memory (230) provides the stored data according to a request of the processor (210).
  • the memory (230) can be configured as a storage medium or a combination of storage media such as a ROM, a RAM, a hard disk, a CD-ROM, and a DVD.
  • the processor (210) can perform at least one of the above-described embodiments based on a program for performing an operation according to at least one of the above-described embodiments of the present disclosure stored in the memory (230).
  • the program may be stored in an attachable storage device that is accessible via a communication network such as the Internet, an intranet, a local area network (LAN), a wide local area network (WLAN), a storage area network (SAN), or a combination thereof.
  • a storage device may be connected to a device performing an embodiment of the present disclosure via an external port.
  • a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.
  • FIG. 13 is a block diagram illustrating a GN device (300) in a communication system according to an embodiment of the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente divulgation concerne un système de communication 5G ou 6G pour prendre en charge un débit de transmission de données supérieur dans lequel un procédé de fonctionnement d'un équipement utilisateur (UE) (100) dans un système de communication sans fil, selon un mode de réalisation de la présente divulgation, peut comprendre les étapes consistant à : transmettre un premier message de demande de rattachement à un dispositif satellite (200) par l'intermédiaire d'une liaison de service ; recevoir, en provenance du dispositif satellite (200) par l'intermédiaire de la liaison de service, des informations de relance indiquant au moins une information parmi un instant de nouveau rattachement, un procédé de nouveau rattachement et une cible de nouveau rattachement ; et transmettre un second message de demande de rattachement au dispositif satellite (200) sur la base des informations de relance.
PCT/KR2025/004538 2024-04-05 2025-04-04 Procédé et appareil d'authentification pour communication par satellite dans un mode de stockage et de réacheminement Pending WO2025211840A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20240046712 2024-04-05
KR10-2024-0046712 2024-04-05
KR10-2024-0110025 2024-08-16
KR1020240110025A KR20250148355A (ko) 2024-04-05 2024-08-16 저장 및 전송 모드의 위성 통신을 위한 인증 방법 및 장치

Publications (1)

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WO2025211840A1 true WO2025211840A1 (fr) 2025-10-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2477449A1 (fr) * 2011-01-12 2012-07-18 HTC Corporation Appareils et procédés pour la mise en ouvre de temporisateurs pour un délai d'attente dans les procédures de gestion de mobilité
KR101911197B1 (ko) * 2015-05-01 2018-12-28 퀄컴 인코포레이티드 위성 통신을 위한 핸드오프
KR20220139306A (ko) * 2020-02-07 2022-10-14 퀄컴 인코포레이티드 5g 뉴 라디오 (nr) 에서의 비-지상 네트워크 (ntn) 시스템에 대한 핸드오버 메커니즘
KR20220149305A (ko) * 2021-04-30 2022-11-08 삼성전자주식회사 위성 통신 시스템에서 기지국에 접속하는 방법 및 장치
KR20240024066A (ko) * 2021-07-07 2024-02-23 삼성전자주식회사 무선 네트워크에서 ue의 이용 불가능성 기간 파라미터를 조정하는 방법 및 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2477449A1 (fr) * 2011-01-12 2012-07-18 HTC Corporation Appareils et procédés pour la mise en ouvre de temporisateurs pour un délai d'attente dans les procédures de gestion de mobilité
KR101911197B1 (ko) * 2015-05-01 2018-12-28 퀄컴 인코포레이티드 위성 통신을 위한 핸드오프
KR20220139306A (ko) * 2020-02-07 2022-10-14 퀄컴 인코포레이티드 5g 뉴 라디오 (nr) 에서의 비-지상 네트워크 (ntn) 시스템에 대한 핸드오버 메커니즘
KR20220149305A (ko) * 2021-04-30 2022-11-08 삼성전자주식회사 위성 통신 시스템에서 기지국에 접속하는 방법 및 장치
KR20240024066A (ko) * 2021-07-07 2024-02-23 삼성전자주식회사 무선 네트워크에서 ue의 이용 불가능성 기간 파라미터를 조정하는 방법 및 시스템

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