# US 12,192,890 B2 · Apparatus and method for managing user plane function in wireless communication system

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- Number: US 12,192,890 B2
- Document ID: US12192890B2
- Status: Granted
- Kind: B2
- Application number: 18/457,191
- Filed: 2023-08-28
- Published: 2023-12-14
- Granted: 2025-01-07
- Earliest claimed: 2020-06-23
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hoyeon Lee; Sangsoo Jeong; Varini Gupta
- Web page: https://patentgrep.com/patent/US12192890B2

## CPC

- H04W 48/18: Selecting a network or a communication service
- H04L 12/1407: {Policy-and-charging control [PCC] architecture}
- H04M 15/41: {Billing record details, i.e. parameters, identifiers, structure of call data record [CDR]}
- H04M 15/61: {based on the service used}
- H04M 15/66: {Policy and charging system}
- H04M 15/8228: {Session based}
- H04W 4/24: Accounting or billing
- H04W 8/06: Registration at serving network Location Register, VLR or user mobility server
- H04W 36/14: Reselecting a network or an air interface
- H04W 60/002: {Registration for requesting network slices}
- H04W 76/12: Setup of transport tunnels
- H04W 76/22: Manipulation of transport tunnels
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

In accordance with an embodiment of the disclosure, a method performed, by an access and mobility management function (AMF), in a wireless communication system, the method comprising receiving, from a user equipment (UE) with a packet data network (PDN) connection established, a registration request message including a first single-network slice selection assistance information (S-NSSAI) associated with the PDN connection, determining a second S-NSSAI associated with a packet data unit (PDU) session corresponding to the PDN connection based on the first S-NSSAI, and transmitting an information regarding the second S-NSSAI to a user plane function (UPF) via a session management function (SMF) to request modification of N4 session.

## Claims

### Claim 1

A method performed, by an access and mobility management function (AMF), in a wireless communication system, the method comprising:
receiving, from a user equipment (UE) with a packet data network (PDN) connection established, a registration request message including first single-network slice selection assistance information (S-NSSAI) associated with the PDN connection;
determining second S-NSSAI associated with a packet data unit (PDU) session corresponding to the PDN connection, based on the first S-NSSAI; and
transmitting the second S-NSSAI to a session management function (SMF), wherein the second S-NSSAI is used for N4 session modification between the SMF and a user plane function (UPF).

### Claim 2 (depends on 1)

The method of claim 1, wherein the transmitting of the second S-NSSAI comprises transmitting a message for requesting an update of the PDU session to the SMF, and
wherein the message for requesting the update of the PDU session includes the second S-NSSAI.

### Claim 3 (depends on 1)

The method of claim 1,
wherein the second S-NSSAI is used for performance measurement by the UPF.

### Claim 4 (depends on 1)

The method of claim 1,
wherein in case that third S-NSSAI stored in the UPF and associated with the PDU session is different with the second S-NSSAI, the third S-NSSAI is updated with the second S-NSSAI.

### Claim 5 (depends on 1)

The method of claim 1,
wherein the second S-NSSAI includes information on a slice/service type (SST) used in a 5th generation system (5GS) and information on a slice differentiator (SD) used in the 5GS.

### Claim 6

An access and mobility management function (AMF) in a wireless communication system, the AMF comprising:
a transceiver; and
at least one processor configured to:
receive, from a user equipment (UE) with a packet data network (PDN) connection established, a registration request message including first single-network slice selection assistance information (S-NSSAI) associated with the PDN connection,
determine second S-NSSAI associated with a packet data unit (PDU) session corresponding to the PDN connection, based on the first S-NSSAI, and
transmit the second S-NSSAI to a session management function (SMF), wherein the second S-NSSAI is used for N4 session modification between the SMF and a user plane function (UPF).

### Claim 7 (depends on 6)

The AMF of claim 6, wherein;
the second S-NSSAI is included in a message for requesting an update of the PDU session, transmitted from the AMF to the SMF.

### Claim 8 (depends on 6)

The AMF of claim 6,
wherein the second S-NSSAI is used for performance measurement by the UPF.

### Claim 9 (depends on 6)

The AMF of claim 6,
wherein in case that third S-NSSAI stored in the UPF and associated with the PDU session is different with the second S-NSSAI, the third S-NSSAI is updated with the second S-NSSAI.

### Claim 10 (depends on 6)

The AMF of claim 6,
wherein the second S-NSSAI includes information on a slice/service type (SST) used in a 5th generation system (5GS) and information on a slice differentiator (SD) used in the 5GS.

### Claim 11

A wireless communication system, the system comprising:
a session management function (SMF); and
an access and mobility management function (AMF) configured to:
receive, from a user equipment (UE) with a packet data network (PDN) connection established, a registration request message including first single-network slice selection assistance information (S-NSSAI) associated with the PDN connection,
determine second S-NSSAI associated with a packet data unit (PDU) session corresponding to the PDN connection, based on the first S-NSSAI, and
transmit the second S-NSSAI to the SMF, and
wherein the SMF is configured to transmit the second S-NSSAI to a user plane function (UPF) for N4 session modification.

### Claim 12 (depends on 11)

The system of claim 11, wherein:
the second S-NSSAI is included in a message for requesting an update of the PDU session, transmitted from the AMF to the SMF.

### Claim 13 (depends on 11)

The system of claim 11, further comprising the UPF configured to use
the second S-NSSAI for performance measurement.

### Claim 14 (depends on 11)

The system of claim 11, further comprising the UPF configured to,
in case that third S-NSSAI stored in the UPF and associated with the PDU session is different with the second S-NSSAI, update the third S-NSSAI with the second S-NSSAI.

### Claim 15 (depends on 11)

The system of claim 11,
wherein the second S-NSSAI includes information on a slice/service type (SST) used in a 5th generation system (5GS) and information on a slice differentiator (SD) used in the 5GS.