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EP-4447409-B1 - METHOD AND SYSTEM FOR HPLMN-BASED TRAFFIC CONTROL WHEN UE IS REGISTERED ON DIFFERENT PLMNS

EP4447409B1EP 4447409 B1EP4447409 B1EP 4447409B1EP-4447409-B1

Inventors

  • KUMAR, Lalith
  • JHA, KAILASH KUMAR
  • Uttur, Govind Irappa
  • M, Shweta
  • BAJAJ, Vikrant

Dates

Publication Date
20260513
Application Date
20190621

Claims (13)

  1. A method performed by a home session management function, H-SMF (141), of a home public land mobile network, HPLMN (100), in a communication system, the method comprising: receiving (820), from a user equipment, UE (300), via a visited PLMN, VPLMN (200), of the communication system, a multi access protocol data unit, MA PDU, session request for the UE (300), wherein the UE (300) is registered to the VPLMN (200) over 3 rd generation partnership project, 3GPP, access and to the HPLMN (100) over non-3GPP access; and transmitting (880), to the UE (300) via the VPLMN (200), access traffic steering, switching and splitting, ATSSS, rules for a MA PDU session for the UE (300) requested by the MA PDU session request in case that the MA PDU session was successfully established.
  2. An apparatus configured to operate as a home session management function, H-SMF (141), of a home public land mobile network, HPLMN (100), in a communication system, the apparatus comprising: a communicator (120); and a processor (140) coupled with the communicator (120) and configured to: receive (820), from a user equipment, UE (300), via a visited PLMN, VPLMN (200), of the communication system, a multi access protocol data unit, MA PDU, session request for the UE (300), wherein the UE (300) is registered to the VPLMN (200) over 3rd generation partnership project, 3GPP, access and to the HPLMN (100) over non-3GPP access; and transmit (880), to the UE (300) via the VPLMN (200), access traffic steering, switching and splitting, ATSSS, rules for a MA PDU session for the UE (300) requested by the MA PDU session request in case that the MA PDU session was successfully established.
  3. The method of claim 1 or the apparatus of claim 2, wherein the ATSSS rules are derived by the H-SMF (141).
  4. The method of claim 1 or the apparatus of claim 2, wherein ATSSS capability information of the UE (300) is received from the UE (300).
  5. The method of claim 1 or the apparatus of claim 2, wherein an N16 interface is used between a visited-SMF, V-SMF (241), in the VPLMN (200) and the H-SMF (141).
  6. The method of claim 1 or the apparatus of claim 2, wherein the ATSSS rules are included in an MA PDU session establishment accept message indicating that the MA PDU session was successfully established.
  7. The method or the apparatus of claim 6, wherein the MA PDU session establishment accept message further includes measurement assistance information.
  8. A method performed by a user equipment, UE (300), in a communication system, the method comprising: transmitting, to a home session management function, H-SMF (141), of a home public land mobile network, HPLMN (100) of the communication system via a visited public land mobile network VPLMN (200) of the communication system, a multi-access protocol data unit MA PDU session request for the UE (300), wherein the UE (300) is registered to the VPLMN (200) over 3 rd generation partnership project 3GPP access and to the HPLMN (100) over non-3GPP access; and receiving, from the H-SMF (141) via the VPLMN (200), access traffic steering, switching and splitting, ATSSS, rules for a MA PDU session for the UE (300) requested by the MA PDU session request in case that the MA PDU session was successfully established.
  9. A user equipment, UE (300), in a communication system, the UE comprising: a communicator (320); and a processor (340) coupled with the communicator (320) and configured to: transmit, to a home session management function, H-SMF (141), of a home public land mobile network, HPLMN (100) of the communication system via a visited public land mobile network VPLMN (200) of the communication system, a multi-access protocol data unit MA PDU session request for the UE (300), wherein the UE (300) is registered to the VPLMN (200) over 3 rd generation partnership project 3GPP access and to the HPLMN (100) over non-3GPP access; and receive, from the H-SMF (141) via the VPLMN (200), access traffic steering, switching and splitting, ATSSS, rules for a MA PDU session for the UE (300) requested by the MA PDU session request in case that the MA PDU session was successfully established.
  10. The method of claim 8 or the UE (300) of claim 9, wherein the ATSSS rules are derived by a home session management function, H-SMF (141), in the HPLMN (100).
  11. The method of claim 8 or the UE (300) of claim 9, wherein ATSSS capability information of the UE (300) is transmitted by the UE (300).
  12. The method of claim 8 or the UE (300) of claim 9, wherein the ATSSS rules are included in an MA PDU session establishment accept message indicating that the MA PDU session was successfully established.
  13. The method or the UE (300) of claim 12, wherein the MA PDU session establishment accept message further includes measurement assistance information.

Description

[Technical Field] The embodiments herein relate to device management. More particularly relates to a method and system for Home Public Land Mobile Network (HPLMN)-based traffic control when user equipment (UE) is registered on different PLMNs. [Background Art] To meet the demand for wireless data traffic having increased since deployment of 4G communication systems, efforts have been made to develop an improved 5G or pre-5G communication system. Therefore, the 5G or pre-5G communication system is also called a 'Beyond 4G Network' or a 'Post LTE System'. The 5G communication system is considered to be implemented in higher frequency (mmWave) bands, e.g., 60GHz bands, so as to accomplish higher data rates. To decrease propagation loss of the radio waves and increase the transmission distance, the beamforming, massive multiple-input multiple-output (MIMO), Full Dimensional MIMO (FD-MIMO), array antenna, an analog beam forming, large scale antenna techniques are discussed in 5G communication systems. In addition, in 5G communication systems, development for system network improvement is under way based on advanced small cells, cloud Radio Access Networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), reception-end interference cancellation and the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) and sliding window superposition coding (SWSC) as an advanced coding modulation (ACM), and filter bank multi carrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA) as an advanced access technology have been developed. The Internet, which is a human centered connectivity network where humans generate and consume information, is now evolving to the Internet of Things (IoT) where distributed entities, such as things, exchange and process information without human intervention. The Internet of Everything (IoE), which is a combination of the loT technology and the Big Data processing technology through connection with a cloud server, has emerged. As technology elements, such as "sensing technology", "wired/wireless communication and network infrastructure", "service interface technology", and "Security technology" have been demanded for loT implementation, a sensor network, a Machine-to-Machine (M2M) communication, Machine Type Communication (MTC), and so forth have been recently researched. Such an loT environment may provide intelligent Internet technology services that create a new value to human life by collecting and analyzing data generated among connected things. IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected cars, smart grid, health care, smart appliances and advanced medical services through convergence and combination between existing Information Technology (IT) and various industrial applications. In line with this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as a sensor network, Machine Type Communication (MTC), and Machine-to-Machine (M2M) communication may be implemented by beamforming, MIMO, and array antennas. Application of a cloud Radio Access Network (RAN) as the above-described Big Data processing technology may also be considered to be as an example of convergence between the 5G technology and the loT technology. In general, consider that a user equipment (UE) is camped to a home network of a subscriber. Consider that the UE is registered with a HPLMN of the home network for both 3rd Generation Partnership Project (3GPP) and non-3GPP access (Consider FIG. 1, step 1). The HPLMN provides the required services to the UE based on a subscriber data policy. Current 3GPP standards support establishment of a Multi-Access protocol data unit (MA PDU) Session for Access Traffic Steering, Switching and Splitting (ATSSS) when the UE is camped on the HPLMN for both 3GPP and non-3GPP access. The ATSSS feature extends 5G system to enable traffic steering, switching and splitting between 3GPP and non-3GPP access networks. The ATSSS feature can be achieved by establishing the MA PDU session between the UE and the network. Further, when the UE is in roaming, the MA PDU session can be established only if the UE is registered to a same visitor Public Land Mobile Network (PLMN) for both the 3GPP access and the non-3GPP access. i.e. only if the UE is registered for both the 3GPP access and non-3GPP access with the same telecom operator, then that telecom operator controls how much traffic flows to 3GPP access and how much traffic should flow over non-3GPP access. However, due to mobility when the UE is registered with different PLMNs i.e., the HPLMN for non-3GPP access and a visited Public Land Mobile Network (VPLMN) for the 3GPP access (step 4), then the MA PDU session gets terminated (step 5) or will not be able to be establi