# US 11,122,416 B2 · Device and method for providing network slice interworking in wireless communication system

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- Number: US 11,122,416 B2
- Document ID: US11122416B2
- Status: Granted
- Kind: B2
- Application number: 16/749,308
- Filed: 2020-01-22
- Published: 2020-07-23
- Granted: 2021-09-14
- Earliest claimed: 2019-01-22
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Hoyeon Lee; Jungshin Park; Sunghoon Kim
- Web page: https://patentgrep.com/patent/US11122416B2

## CPC

- H04W 8/082: {for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents}
- H04W 76/12: Setup of transport tunnels
- H04W 8/00: Network data management
- H04W 8/06: Registration at serving network Location Register, VLR or user mobility server
- H04W 48/18: Selecting a network or a communication service
- H04W 60/002: {Registration for requesting network slices}
- H04W 60/005: {Multiple registrations, e.g. multihoming}
- H04W 60/04: using triggered events
- H04W 76/10: Connection setup
- H04W 8/02: Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W 84/042: {Public Land Mobile systems, e.g. cellular systems}
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04W 88/16: Gateway arrangements
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A pre-5th-Generation (5G) or 5G communication system for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE), in which a method performed by a user equipment (UE) includes transmitting, to a first base station (BS), a packet data network (PDN) connection request message receiving, from the first BS, information on a first single-network slice selection assistance information (S-NSSAI) selected by a combination of a packet data network gateway control plane entity (PGW-C) and a session management function (SMF) from among the UE's at least one subscribed S-NSSAI, transmitting, to a second BS, a registration request message including a requested NSSAI in which the first S-NSSAI is included, and receiving, from the second BS, a registration accept message including an allowed NSSAI in which a second S-NSSAI mapped to the first S-NSSAI is included.

## Claims

### Claim 1

A method for operating a user equipment (UE) in a wireless communication system, the method comprising:
transmitting, to a first base station (BS), a packet data network (PDN) connection request message;
receiving, from the first BS, information on a first single-network slice selection assistance information (S-NSSAI) selected by a combination of a packet data network gateway control plane entity (PGW-C) and a session management function (SMF) from among the UE's at least one subscribed S-NSSAI;
transmitting, to a second BS, a registration request message including a requested NSSAI in which the first S-NSSAI is included; and
receiving, from the second BS, a registration accept message including an allowed NSSAI in which a second S-NSSAI mapped to the first S-NSSAI is included.

### Claim 2 (depends on 1)

The method of claim 1, wherein, in case of home routed (HR) roaming, the first S-NSSAI is a home public land mobile network S-NSSAI (HPLMN S-NSSAI).

### Claim 3 (depends on 1)

The method of claim 1, wherein the second S-NSSAI is a visited public land mobile network S-NSSAI (VPLMN S-NSSAI) mapped to the first S-NSSAI which is a home public land mobile network S-NSSAI (HPLMN S-NSSAI).

### Claim 4 (depends on 1)

The method of claim 1, wherein the second S-NSSAI is determined to be mapped to the first S-NSSAI by a network slice selection function (NSSF).

### Claim 5 (depends on 1)

The method of claim 1, wherein the first base station is based on an evolved packet system (EPS), and the second base station is based on a 5th generation wireless system (5GS).

### Claim 6 (depends on 1)

The method of claim 1, wherein the information on the first S-NSSAI is received via protocol configuration options (PCO).

### Claim 7 (depends on 1)

The method of claim 1, further comprising:
ensuring whether the requested NSSAI in which the first S-NSSAI is included is not in conflict with user equipment route selection policy rules (URSP rules).

### Claim 8

A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver; and
at least one processor operably coupled to the transceiver, and configured to:
transmit, to a first base station (BS), a packet data network (PDN) connection request message;
receive, from the first BS, information on a first single-network slice selection assistance information (S-NSSAI) selected by a combination of a packet data network gateway control plane entity (PGW-C) and a session management function (SMF) from among the UE's at least one subscribed S-NSSAI;
transmit, to a second BS, a registration request message including a requested NSSAI in which the first S-NSSAI is included; and
receive, from the second BS, a registration accept message including an allowed NSSAI in which a second S-NSSAI mapped to the first S-NSSAI is included.

### Claim 9 (depends on 8)

The UE of claim 8, wherein, in case of home routed (HR) roaming, the first S-NSSAI is a home public land mobile network S-NSSAI (HPLMN S-NSSAI).

### Claim 10 (depends on 8)

The UE of claim 8, wherein the second S-NSSAI is a visited public land mobile network S-NSSAI (VPLMN S-NSSAI) mapped to the first S-NSSAI which is a home public land mobile network S-NSSAI (HPLMN S-NSSAI).

### Claim 11 (depends on 8)

The UE of claim 8, wherein the second S-NSSAI is determined to be mapped to the first S-NSSAI by a network slice selection function (NSSF).

### Claim 12 (depends on 8)

The UE of claim 8, wherein the first base station is based on an evolved packet system (EPS), and the second base station is based on a 5th generation wireless system (5GS).

### Claim 13 (depends on 8)

The UE of claim 8, wherein the information on the first 5-NSSAI is received via protocol configuration options (PCO).

### Claim 14 (depends on 8)

The UE of claim 8, wherein the at least one processor is further configured to:
ensure whether the requested NSSAI in which the first S-NSSAI is included is not in conflict with user equipment route selection policy rules (URSP rules).