# US 11,444,683 B2 · Wireless relay slices in a wireless communication network

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- Number: US 11,444,683 B2
- Document ID: US11444683B2
- Status: Granted
- Kind: B2
- Application number: 17/066,775
- Filed: 2020-10-09
- Published: 2022-04-14
- Granted: 2022-09-13
- Earliest claimed: 2020-10-09
- Assignees: Sprint Communications Company L.P.
- Applicants: T-Mobile Innovations LLC
- Inventors: Marouane Balmakhtar; Lyle Walter Paczkowski
- Web page: https://patentgrep.com/patent/US11444683B2

## CPC

- H04B 7/155: Ground-based stations (H04B7/204 takes precedence)
- H04W 76/12: Setup of transport tunnels
- H04W 48/18: Selecting a network or a communication service
- H04W 60/002: {Registration for requesting network slices}
- H04W 84/047: {using dedicated repeater stations}
- Y02D 30/70: in wireless communication networks
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

In a wireless communication network, an Access and Mobility Management Function (AMF) receives signaling for a wireless relay and transfers a slice request to a Network Slice Selection Function (NSSF). The NSSF transfers a network slice Identifier (ID) and relay slice IDs to the AMF. The AMF transfers the network slice ID and the relay slice IDs to a Session Management Function (SMF). The SMF instantiates a network User Plane Function (UPF) responsive to the network slice ID. The SMF instantiates relay UPFs in the wireless relay responsive to the relay slice IDs. The wireless relay wirelessly exchanges data with the UEs. The relay UPFs process the user data for the relay slices. The wireless relay wirelessly exchanges the user data with the wireless access node which exchanges the data with the network UPF. The network UPF processes the user data for the network slice.

## Claims

### Claim 1

A method of operating a wireless communication network to serve a wireless User Equipment (UEs) over relay slices in a wireless relay and a network slice in the wireless communication network, the method comprising:
the wireless relay wirelessly attaching to a wireless access node that responsively transfers relay attachment signaling for the wireless relay to an Access and Mobility Management Function (AMF);
the AMF receiving the relay attachment signaling for the wireless relay and responsively transferring a relay slice request for the wireless relay to a Network Slice Selection Function (NSSF), the NSSF receiving the relay slice request and responsively transferring a network slice Identifier (ID) for the network slice and relay slice IDs for the relay slices for the wireless relay to the AMF, the AMF receiving the network slice ID and the relay slice IDs and responsively transferring the network slice ID and the relay slice IDs for the wireless relay to a Session Management Function (SMF), and the SMF receiving the network slice ID and the relay slice IDs, and in response, instantiating a network User Plane Function (UPF) in the wireless communication network responsive to the network slice ID, instantiating relay UPFs in the wireless relay responsive to the relay slice IDs, and instantiating relay Control Plane Functions (CPFs) in the wireless relay for the relay slices;
the wireless relay wirelessly exchanging user data with the UEs, the relay UPFs processing the user data for the relay slices, the wireless relay wirelessly exchanging the user data with the wireless access node that exchanges the user data with the network UPF, the wireless relay wirelessly receiving UE attachments from the UEs and the CPFs responsively transferring UE attachment signaling for the UEs to the wireless access node that responsively transfers the UE attachment signaling to the AMF;
the AMF receiving the UE attachment signaling and responsively transferring UE slice requests for the UEs to the NSSF, the NSSF receiving the UE slice requests and responsively indicating the relay slice IDs for the UEs to the AMF, the AMF receiving the relay slice IDs for the UEs and responsively transferring the relay slice IDs for the UEs to the SMF, the SMF receiving the relay slice IDs for the UEs and responsively instructing the relay CPFs in the wireless relay to serve the UEs for the relay slices;
the CPFs in the wireless relay receiving the SMF instructions and responsively directing the relay UPFs in the wireless relay to serve the UE for the relay slices; and
the network UPF receiving and processing the user data for the network slice.

### Claim 2 (depends on 1)

The method of claim 1 wherein the NSSF indicating the relay slice IDs for the wireless relay to the AMF comprises:
the NSSF transferring a relay ID to distributed ledger; and
the distributed ledger processing the relay ID and responsively generating a consensus on the relay slice IDs and indicating the relay slice IDs to the NSSF.

### Claim 3 (depends on 1)

The method of claim 1 wherein the SMF instantiating the relay UPFs in the wireless relay for the relay slices comprises:
the SMF transferring the relay slice ID to a distributed ledger; and
the distributed ledger receiving and processing the relay slice ID, and in response, generating a consensus on the relay UPF and indicating the relay UPF to the wireless relay.

### Claim 4 (depends on 1)

The method of claim 1 further comprising:
the relay UPF in the wireless relay generating relay slice usage information and transferring the relay slice usage information to a distributed ledger; and
the distributed ledger receiving and processing the relay slice usage information and responsively generating a consensus on usage of the relay slice.

### Claim 5 (depends on 1)

The method of claim 1 wherein the wireless relay wirelessly exchanging the user data with the UEs comprises implementing individual wireless bandwidths specified for individual ones of the relay slices.

### Claim 6 (depends on 1)

The method of claim 1 wherein the wireless relay wirelessly exchanging the user data with the UE, processing the user data with the relay UPFs for the relay slices, and wirelessly exchanging the user data with the wireless access node comprises the wireless relay using individual hardware amounts specified for individual ones of the relay slices.

### Claim 7 (depends on 1)

The method of claim 1 wherein the wireless relay wirelessly exchanging the user data with the UE, processing the user data with the relay UPFs for the relay slices, and wirelessly exchanging the user data with the wireless access node comprises the wireless relay using individual data rates specified for individual ones of the relay slices.

### Claim 8 (depends on 1)

The method of claim 1 wherein the wireless relay comprises:
a Fifth Generation New Radio (5GNR) gNodeB; and
a 5GNR Relay User Equipment (R-UE).

### Claim 9

A wireless communication network to serve a wireless User Equipment (UEs) over relay slices in a wireless relay and a network slice in the wireless communication network, the wireless communication network comprising:
the wireless relay wirelessly configured to attach to a wireless access node that responsively transfers relay attachment signaling for the wireless relay to an Access and Mobility Management Function (AMF);
the AMF configured to receive the relay attachment signaling for the wireless relay and responsively transfer a relay slice request for the wireless relay to a Network Slice Selection Function (NSSF), the NSSF configured to receive the relay slice request and responsively transfer a network slice Identifier (ID) for the network slice and relay slice IDs for the relay slices for the wireless relay to the AMF, the AMF configured to receive the network slice ID and the relay slice IDs and responsively transfer the network slice ID and the relay slice IDs for the wireless relay to a Session Management Function (SMF), and the SMF configured to receive the network slice ID and the relay slice IDs, and in response, instantiate a network User Plane Function (UPF) in the wireless communication network responsive to the network slice ID, instantiate relay UPFs in the wireless relay responsive to the relay slice IDs, and instantiate relay Control Plane Functions (CPFs) in the wireless relay for the relay slices;
the wireless relay configured to wirelessly exchange user data with the UEs, the relay UPFs configured to process the user data for the relay slices, the wireless relay configured to wirelessly exchange the user data with the wireless access node that exchanges the user data with the network UPF, the wireless relay configured to wirelessly receive UE attachments from the UEs, and the CPFs configured to responsively transfer UE attachment signaling for the UEs to the wireless access node that responsively transfers the UE attachment signaling to the AMF;
the AMF configured to receive the UE attachment signaling and responsively transfer UE slice requests for the UEs to the NSSF, the NSSF configured to receive the UE slice requests and responsively indicate the relay slice IDs for the UEs to the AMF, the AMF configured to receive the relay slice IDs for the UEs and responsively transfer the relay slice IDs for the UEs to the SMF, the SMF configured to receive the relay slice IDs for the UEs and responsively instruct the relay CPFs in the wireless relay to serve the UEs for the relay slices;
the CPFs in the wireless relay configured to receive the SMF instructions and responsively direct the relay UPFs in the wireless relay to serve the UE for the relay slices; and
the network UPF configured to receive and process the user data for the network slice.

### Claim 10 (depends on 9)

The wireless communication network of claim 9 wherein:
the NSSF is configured to transfer a relay ID to distributed ledger; and
the distributed ledger is configured to process the relay ID and responsively generate a consensus on the relay slice IDs and indicate the relay slice IDs to the NSSF.

### Claim 11 (depends on 9)

The wireless communication network of claim 9 wherein:
the SMF is configured to transfer the relay slice ID to a distributed ledger; and
the distributed ledger is configured to receive and process the relay slice ID, and in response, generate a consensus on the relay UPF and indicate the relay UPF to the wireless relay.

### Claim 12 (depends on 9)

The wireless communication network of claim 9 further comprising:
the relay UPF in the wireless relay configured to generate relay slice usage information and transfer the relay slice usage information to a distributed ledger; and
the distributed ledger configured to receive and process the relay slice usage information and responsively generate a consensus on usage of the relay slice.

### Claim 13 (depends on 9)

The wireless communication network of claim 9 wherein the wireless relay is configured to implement individual wireless bandwidths specified for individual ones of the relay slices.

### Claim 14 (depends on 9)

The wireless communication network of claim 9 wherein the wireless relay is configured to use individual hardware amounts specified for individual ones of the relay slices.

### Claim 15 (depends on 9)

The wireless communication network of claim 9 wherein the wireless relay is configured to use individual data rates specified for individual ones of the relay slices.

### Claim 16 (depends on 9)

The wireless communication network of claim 9 wherein the wireless relay comprises:
a Fifth Generation New Radio (5GNR) gNodeB; and
a 5GNR Relay User Equipment (R-UE).