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EP-4738976-A1 - METHOD AND APPARATUS FOR CONTROLLING PDU SESSION IN WIRELESS COMMUNICATION SYSTEM

EP4738976A1EP 4738976 A1EP4738976 A1EP 4738976A1EP-4738976-A1

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology.

Inventors

  • BAEK, YOUNGKYO
  • PARK, JUNGSHIN

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240725

Claims (15)

  1. A method performed by an access and mobility management function (AMF) entity in a wireless communication system, the method comprising: acquiring information on a femto system associated with a local data network; selecting a session management function (SMF) entity, based on the information on the femto system; and transmitting, to the SMF entity, a first message including a request for establishing a PDU session associated with the local data network.
  2. The method of claim 1, wherein the information on the femto system comprises at least one of an identifier of the femto system, a cell identifier regarding the femto system, an indicator indicating that the femto system is a femto system, and a network entity address of the femto system.
  3. The method of claim 1, wherein the acquiring of the information on the femto system comprises receiving, from a base station associated with the femto system, a second message including the information on the femto system, and wherein the second message further comprises the request for establishing the PDU session associated with the local data network.
  4. The method of claim 1, wherein the SMF entity is either a local SMF entity associated with the femto system or an SMF entity associated with a macro system.
  5. A method performed by a session management function (SMF) entity in a wireless communication system, the method comprising: receiving, from an access and mobility management function (AMF) entity, a first message including a request for establishing a PDU session associated with a local data network; and transmitting, to a local user plane function (UPF) entity associated with a femto system, a second message for establishing the PDU session.
  6. The method of claim 5, wherein the SMF entity is either a local SMF entity associated with the femto system or an SMF entity associated with a macro system.
  7. The method of claim 6, wherein, in case that the SMF entity is the SMF associated with the macro system, the first message further comprises information on the femto system, and wherein the method further comprises identifying the local UPF entity, based on the information on the femto system.
  8. The method of claim 7, wherein the information on the femto system comprises at least one of an identifier of the femto system, a cell identifier regarding the femto system, an indicator indicating that the femto system is a femto system, and a network entity address of the femto system.
  9. An access and mobility management function (AMF) entity in a wireless communication system, comprising: a transceiver; and a controller coupled to the transceiver, wherein the controller is configured to: acquire information on a femto system associated with a local data network; select a session management function (SMF) entity, based on the information on the femto system; and transmit, to the SMF entity, a first message including a request for establishing a PDU session associated with the local data network.
  10. The AMF entity of claim 9, wherein the information on the femto system comprises at least one of an identifier of the femto system, a cell identifier regarding the femto system, an indicator indicating that the femto system is a femto system, and a network entity address of the femto system.
  11. The AMF entity of claim 9, wherein the acquiring of the information on the femto system comprises receiving, from a base station, a second message including the information on the femto system, and wherein the second message further comprises the request for establishing the PDU session associated with the local data network.
  12. The AMF entity of claim 9, wherein the SMF entity is either a local SMF entity associated with the femto system or an SMF entity associated with a macro system.
  13. A session management function (SMF) entity in a wireless communication system, comprising: a transceiver; and a controller coupled to the transceiver, wherein the controller is configured to: receive, from an access and mobility management function (AMF) entity, a first message including a request for establishing a PDU session associated with a local data network; and transmit, to a local user plane function (UPF) entity associated with a femto system, a second message for establishing the PDU session.
  14. The SMF entity of claim 13, wherein the SMF entity is either a local SMF entity associated with the femto system or an SMF entity associated with a macro system.
  15. The SMF entity of claim 13, wherein, in case that the SMF entity is an SMF associated with a macro system: the first message further comprises information on the femto system, and the controller is configured to identify the local UPF entity, based on the information on the femto system, and wherein the information on the femto system comprises at least one of an identifier of the femto system, a cell identifier regarding the femto system, an indicator indicating that the femto system is a femto system, and a network entity address of the femto system.

Description

[Technical Field] The disclosure relates to a wireless communication system and, more particularly, to a method and an apparatus for controlling a PDU session so that a terminal connected to a femto base station in the wireless communication system receives a data service through a femto system. [Background Art] 5G mobile communication technologies define broad frequency bands such that high transmission rates and new services are possible, and can be implemented not only in "Sub 6GHz" bands such as 3.5GHz, but also in "Above 6GHz" bands referred to as mmWave including 28GHz and 39GHz. In addition, it has been considered to implement 6G mobile communication technologies (referred to as Beyond 5G systems) in terahertz (THz) bands (for example, 95GHz to 3THz bands) in order to accomplish transmission rates fifty times faster than 5G mobile communication technologies and ultra-low latencies one-tenth of 5G mobile communication technologies. At the beginning of the development of 5G mobile communication technologies, in order to support services and to satisfy performance requirements in connection with enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine-Type Communications (mMTC), there has been ongoing standardization regarding beamforming and massive MIMO for mitigating radio-wave path loss and increasing radio-wave transmission distances in mmWave, supporting numerologies (for example, operating multiple subcarrier spacings) for efficiently utilizing mmWave resources and dynamic operation of slot formats, initial access technologies for supporting multi-beam transmission and broadbands, definition and operation of BWP (BandWidth Part), new channel coding methods such as a LDPC (Low Density Parity Check) code for large amount of data transmission and a polar code for highly reliable transmission of control information, L2 preprocessing, and network slicing for providing a dedicated network specialized to a specific service. Currently, there are ongoing discussions regarding improvement and performance enhancement of initial 5G mobile communication technologies in view of services to be supported by 5G mobile communication technologies, and there has been physical layer standardization regarding technologies such as V2X (Vehicle-to-everything) for aiding driving determination by autonomous vehicles based on information regarding positions and states of vehicles transmitted by the vehicles and for enhancing user convenience, NR-U (New Radio Unlicensed) aimed at system operations conforming to various regulation-related requirements in unlicensed bands, NR UE Power Saving, Non-Terrestrial Network (NTN) which is UE-satellite direct communication for providing coverage in an area in which communication with terrestrial networks is unavailable, and positioning. Moreover, there has been ongoing standardization in air interface architecture/protocol regarding technologies such as Industrial Internet of Things (IIoT) for supporting new services through interworking and convergence with other industries, IAB (Integrated Access and Backhaul) for providing a node for network service area expansion by supporting a wireless backhaul link and an access link in an integrated manner, mobility enhancement including conditional handover and DAPS (Dual Active Protocol Stack) handover, and two-step random access for simplifying random access procedures (2-step RACH for NR). There also has been ongoing standardization in system architecture/service regarding a 5G baseline architecture (for example, service based architecture or service based interface) for combining Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technologies, and Mobile Edge Computing (MEC) for receiving services based on UE positions. As 5G mobile communication systems are commercialized, connected devices that have been exponentially increasing will be connected to communication networks, and it is accordingly expected that enhanced functions and performances of 5G mobile communication systems and integrated operations of connected devices will be necessary. To this end, new research is scheduled in connection with eXtended Reality (XR) for efficiently supporting AR (Augmented Reality), VR (Virtual Reality), MR (Mixed Reality) and the like, 5G performance improvement and complexity reduction by utilizing Artificial Intelligence (AI) and Machine Learning (ML), AI service support, metaverse service support, and drone communication. Furthermore, such development of 5G mobile communication systems will serve as a basis for developing not only new waveforms for providing coverage in terahertz bands of 6G mobile communication technologies, multi-antenna transmission technologies such as Full Dimensional MIMO (FD-MIMO), array antennas and large-scale antennas, metamaterial-based lenses and antennas for improving coverage of terahertz band signals, high-dimensional space multiplexing tec