SERVICE MANAGEMENT ORCHESTRATION DRIVEN NETWORK ENERGY SAVING USING O1 INTERFACE

1 . A method, comprising:

receiving, by a Service Management and Orchestration (SMO) of an Open Radio Access Network (O-RAN), network energy saving (NES) information from at least one of an O-RAN Distributed Unit (O-DU) and an O-RAN Centralized Unit (O-CU), wherein the NES information includes capability exposing information received from an O-RAN Radio Unit (O-RU);

determining, by the SMO based at least in part on the NES information, whether to activate an NES use-case;

based on determining to activate the NES use-case, sending, by the SMO, a trigger to activate the NES use-case; and

receiving, by the SMO, a first notification indicating a change in a state of the NES use-case.

2 . The method as claimed in claim 1 , further comprising:

receiving, by the SMO, further NES information including traffic load performance and energy consumption measurements from at least one of the O-DU and the O-CU;

determining, by the SMO based at least in part on the further NES information, whether to deactivate the NES use-case;

based on determining to deactivate the NES use-case, sending, by the SMO, a trigger to the O-CU to deactivate the NES use-case; and

receiving, by the SMO, a second notification indicating a change in the state of the NES use-case.

3 . The method as claimed in claim 1 , wherein:

the NES use-case is Cell and Carrier Switch Off/On;

the trigger is sent to the O-CU;

based on receiving the trigger, the O-CU is configured to send a request to the O-DU to request deactivation of cells and associated carriers;

based on receiving the request, the O-DU is configured to process Cell and Carrier Switch Off to an O-RU via a management plane (M-Plane) to set the O-RU into an energy saving state; and

the O-RU is configured to be set into the energy saving state by disabling an associated array-carrier.

4 . The method as claimed in claim 1 , wherein:

the NES use-case is TRx control, wherein the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to send attributes and parameters to the O-CU to update a Synchronization Signal Block (SSB) configuration, and send a Section type 4 Control Plane (ST4 C-Plane) message with TRx control associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by turning off appropriate RF Channels and Antenna Elements based on the ST4 C-Plane message.

5 . The method as claimed in claim 4 , wherein:

the determining whether to activate the NES use-case is further based on using an Artificial Intelligence (AI) or machine learning (ML) algorithm; and

the method further comprises, based on determining to not activate the NES use-case, sending, by the SMO, a message to the O-CU and the O-DU indicating to not activate TRx control.

6 . The method as claimed in claim 1 , wherein:

the NES use-case is Advanced Sleep Mode (ASM);

the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to either stop sending configuration update(s) to the O-CU, or send attributes and parameters to the O-CU to update a SSB configuration, and send a ST4 C-Plane message with Sleep Mode associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by putting the O-RU to sleep or putting components of the O-RU to sleep based on the ST4 C-Plane message.

7 . The method as claimed in claim 1 , wherein the NES information comprises NES use-case(s) related capabilities, traffic load performance, and energy consumption measurements.

8 . A Service Management and Orchestration (SMO) of an Open Radio Access Network (O-RAN) configured to:

receive network energy saving (NES) information from at least one of an O-RAN Distributed Unit (O-DU) and an O-RAN Centralized Unit (O-CU), wherein the NES information includes capability exposing information received from an O-RAN Radio Unit (O-RU);

determine based at least in part on the NES information, whether to activate an NES use-case;

based on determining to activate the NES use-case, send a trigger to activate the NES use-case; and

receive a first notification indicating a change in a state of the NES use-case.

9 . The SMO as claimed in claim 8 , further configured to:

receive further NES information including traffic load performance and energy consumption measurements from at least one of the O-DU and the O-CU;

determine based at least in part on the further NES information, whether to deactivate the NES use-case;

based on determining to deactivate the NES use-case, send a trigger to the O-CU to deactivate the NES use-case; and

receive a second notification indicating a change in the state of the NES use-case.

10 . The SMO as claimed in claim 8 , wherein:

the NES use-case is Cell and Carrier Switch Off/On;

the trigger is sent to the O-CU;

based on receiving the trigger, the O-CU is configured to send a request to the O-DU to request deactivation of cells and associated carriers;

based on receiving the request, the O-DU is configured to process Cell and Carrier Switch Off to an O-RU via a management plane (M-Plane) to set the O-RU into an energy saving state; and

the O-RU is configured to be set into the energy saving state by disabling an associated array-carrier.

11 . The SMO as claimed in claim 8 , wherein:

the NES use-case is TRx control, wherein the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to send attributes and parameters to the O-CU to update a Synchronization Signal Block (SSB) configuration, and send a Section type 4 Control Plane (ST4 C-Plane) message with TRx control associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by turning off appropriate RF Channels and Antenna Elements based on the ST4 C-Plane message.

12 . The SMO as claimed in claim 11 , wherein:

the SMO is configured to determine whether to activate the NES use-case further based on using an Artificial Intelligence (AI) or machine learning (ML) algorithm; and

the SMO is further configured to, based on determining to not activate the NES use-case, send a message to the O-CU and the O-DU indicating to not activate TRx control.

13 . The SMO as claimed in claim 8 , wherein:

the NES use-case is Advanced Sleep Mode (ASM);

the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to either stop sending configuration update(s) to the O-CU, or send attributes and parameters to the O-CU to update a SSB configuration, and send a ST4 C-Plane message with Sleep Mode associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by putting the O-RU to sleep or putting components of the O-RU to sleep based on the ST4 C-Plane message.

14 . The SMO as claimed in claim 8 , wherein the NES information comprises NES use-case(s) related capabilities, traffic load performance, and energy consumption measurements.

15 . At least one non-transitory computer-readable recording medium having recorded thereon instructions executable to implement a method comprising:

receiving, by a Service Management and Orchestration (SMO) of an Open Radio Access Network (O-RAN), network energy saving (NES) information from at least one of an O-RAN Distributed Unit (O-DU) and an O-RAN Centralized Unit (O-CU), wherein the NES information includes capability exposing information received from an O-RAN Radio Unit (O-RU);

determining, by the SMO based at least in part on the NES information, whether to activate an NES use-case;

based on determining to activate the NES use-case, sending, by the SMO, a trigger to activate the NES use-case; and

receiving, by the SMO, a first notification indicating a change in a state of the NES use-case.

16 . The at least one-transitory computer-readable recording medium as claimed in claim 15 , the method, further comprising:

receiving, by the SMO, further NES information including traffic load performance and energy consumption measurements from at least one of the O-DU and the O-CU;

determining, by the SMO based at least in part on the further NES information, whether to deactivate the NES use-case;

based on determining to deactivate the NES use-case, sending, by the SMO, a trigger to the O-CU to deactivate the NES use-case; and

receiving, by the SMO, a second notification indicating a change in the state of the NES use-case.

17 . The at least one-transitory computer-readable recording medium as claimed in claim 15 , wherein:

the NES use-case is Cell and Carrier Switch Off/On;

the trigger is sent to the O-CU;

based on receiving the trigger, the O-CU is configured to send a request to the O-DU to request deactivation of cells and associated carriers;

based on receiving the request, the O-DU is configured to process Cell and Carrier Switch Off to an O-RU via a management plane (M-Plane) to set the O-RU into an energy saving state; and

the O-RU is configured to be set into the energy saving state by disabling an associated array-carrier.

18 . The at least one-transitory computer-readable recording medium as claimed in claim 15 , wherein:

the NES use-case is TRx control, wherein the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to send attributes and parameters to the O-CU to update a Synchronization Signal Block (SSB) configuration, and send a Section type 4 Control Plane (ST4 C-Plane) message with TRx control associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by turning off appropriate RF Channels and Antenna Elements based on the ST4 C-Plane message.

19 . The at least one-transitory computer-readable recording medium as claimed in claim 18 , wherein:

the determining whether to activate the NES use-case is further based on using an Artificial Intelligence (AI) or machine learning (ML) algorithm; and

the method further comprises, based on determining to not activate the NES use-case, sending, by the SMO, a message to the O-CU and the O-DU indicating to not activate TRx control.

20 . The at least one-transitory computer-readable recording medium as claimed in claim 15 , wherein:

the NES use-case is Advanced Sleep Mode (ASM);

the trigger is sent to the O-DU;

based on receiving the trigger, the O-DU is configured to either stop sending configuration update(s) to the O-CU, or send attributes and parameters to the O-CU to update a SSB configuration, and send a ST4 C-Plane message with Sleep Mode associated parameters to the O-RU to set the O-RU into an energy saving state; and

the O-RU is set into the energy saving state by putting the O-RU to sleep or putting components of the O-RU to sleep based on the ST4 C-Plane message.