# US 2025/0097720 A1 · Ru/du setup and chaining in o-ran

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- Number: US 2025/0097720 A1
- Document ID: US20250097720A1
- Status: Published application
- Kind: A1
- Application number: 18/468,518
- Filed: 2023-09-15
- Published: 2025-03-20
- Earliest claimed: 2023-09-15
- Assignees: DISH Wireless L.L.C.
- Applicants: DISH Wireless L.L.C.
- Inventors: Orlando Cuavas; Prakash Srinivasan
- Web page: https://patentgrep.com/patent/US20250097720A1

## CPC

- H04W 16/18: Network planning tools
- H04W 88/085: {Access point devices with remote components}
- H04W 92/12: between access points and access point controllers
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

Various embodiments provide RU/DU/CU chaining in an O-RAN by ZTP operations automatically. The chaining creates a logical gNB for achieving flexibility in the O-RAN. In some embodiments, one or more RUs are chained to a DU in a cell site when the DU is initiated in the O-RAN. In those embodiments, a network management system is employed to store and manage O-RAN configurations to facilitate the RU/DU/CU chaining. In some embodiments, the cell site is customized during the chaining process.

## Claims

### Claim 1

A method for chaining a radio unit and distribution unit automatically in an open radio access network (O-RAN), the method being implemented by a computer system, wherein the method comprises:
detecting a distribution unit (DU) is instantiated in the O-RAN;
obtaining chaining information for the DU, the chaining information indicating a chaining between the DU and at least one radio unit (RU);
resetting the at least one RU; and
chaining the DU with the at least one RU to form a radio access network (RAN) for a cell site.

### Claim 2 (depends on 1)

The method of claim 1, wherein the method further comprises:
reserving one or more network addresses for the at least RU; and, wherein the chaining of the DU with the at least one RU uses the one or more network addresses.

### Claim 3 (depends on 1)

The method of claim 1, wherein the method further comprises:
Validating the RAN to verify the RAN is accessible.

### Claim 4 (depends on 1)

The method of claim 1, wherein the method further comprises performing customization for the cell site after the RAN is accessible.

### Claim 5 (depends on 1)

The method of claim 1, wherein the RU and the DU are both physically located on the cell site.

### Claim 6 (depends on 1)

The method of claim 1, wherein the RU is physically located on the cell site and the DU is physically located remoted to the cell site.

### Claim 7 (depends on 1)

The method of claim 1, wherein the method further comprising chaining the DU with a central unit (CU), wherein the CU is configured for non-real time scheduling functions and the DU is configured for real time scheduling functions.

### Claim 8 (depends on 7)

The method of claim 7, wherein chaining the DU with the CU comprises:
detecting the CU is instantiated and obtaining information indicating the CU is to be chained with the DU.

### Claim 9 (depends on 7)

The method of claim 7, wherein the RU, DU and CU to form a gnodeB (gNb).

### Claim 10

A computer system configured to execute a method for chaining a radio unit and distribution unit automatically in an open radio access network (O-RAN), wherein when the method is executed, the computer system is caused to perform:
detecting a distribution unit (DU) is instantiated in the O-RAN;
obtaining chaining information for the DU, the chaining information indicating a chaining between the DU and at least one radio unit (RU);
resetting the at least one RU; and
chaining the DU with the at least one RU to form a radio access network (RAN) 11 for a cell site.

### Claim 11 (depends on 10)

The computer system of claim 10, wherein the computer system is further caused to perform:
reserving one or more network addresses for the at least RU; and, wherein the chaining of the DU with the at least one RU uses the one or more network addresses.

### Claim 12 (depends on 10)

The computer system of claim 10, wherein the computer system is further caused to perform:
validating the RAN to verify the RAN is accessible.

### Claim 13 (depends on 10)

The computer system of claim 10, wherein the computer system is further caused to perform customization for the cell site after the RAN is accessible.

### Claim 14 (depends on 10)

The computer system of claim 10, wherein the RU and the DU are both physically located on the cell site.

### Claim 15 (depends on 10)

The computer system of claim 10, wherein the RU is physically located on the cell site and the DU is physically located remoted to the cell site.

### Claim 16 (depends on 10)

The computer system of claim 10, wherein the computer system is further caused to perform chaining the DU with a central unit (CU), wherein the CU is configured for non-real time scheduling functions and the DU is configured for real time scheduling functions.

### Claim 17 (depends on 16)

The computer system of claim 16, wherein chaining the DU with the CU comprises: detecting the CU is instantiated and obtaining information indicating the CU is to be chained with the DU.

### Claim 18 (depends on 16)

The computer system of claim 16, wherein the RU, DU and CU to form a gnodeB (gNb).