The xApplication for ONOS-SDRAN (µONOS Architecture) to manage RAN slices

The onos-rsm is the xApplication running over ONOS SD-RAN for RAN Slice Management (RSM). The RAN slice has definitions related with Quality of Service (QoS) for associated UEs, such as time frame rates and scheduling algorithms. In order to manage the RAN slice, this xApplication creates, deletes, and updates RAN slices through CLI. Also, this xApplication associates a specific UE to a RAN slice so that the UE can achieve the QoS that is defined in the associated RAN slice. The onos-rsm xApplication subscribes CU E2 nodes as well as DU E2 nodes. CU E2 nodes report the EPC Mobility Management (EMM) event to the onos-rsm xApp. On the other hands, DU E2 nodes receive control messages for RAN slice management and UE-slice association. The onos-rsm xApplication stores all RAN slice information to onos-topo and onos-uenib.

To begin with, onos-rsm subscribes CUs and DUs through onos-e2t. Once UE is attached, the CU send the indication message to onos-rsm to report that the UE is connected. Then, onos-rsm stores the attached UE information to onos-uenib. When a user creates/deletes/updates a slice through onos-cli, onos-rsm sends a control message to DU. Likewise, the user associates UE with a created slice through onos-cli, onos-rsm sends a control message to DU. After sending the control message successfully, onos-rsm updates onos-topo and onos-uenib, accordingly.

Go to onos-cli and command below for each purpose

• Create slice
  • DU_E2_NODE_ID: target DU's E2 Node ID (e.g., e2:4/e00/3/c8).
  • SCHEDULER_TYPE: scheduler type such as round robin (RR) and proportional fair (PF).
  • SLICE_ID: this slice's ID (e.g., 1).
  • WEIGHT: time frame rates (e.g., 30). It should be less than 80.
  • SLICE_TYPE: downlink (DL) or uplink (UL).

onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm create slice --e2NodeID <DU_E2_NODE_ID> --scheduler <SCHEDULER_TYPE> --sliceID <SLICE_ID> --weight <WEIGHT> --sliceType <SLICE_TYPE>

# example:
onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm create slice --e2NodeID e2:4/e00/3/c8 --scheduler RR --sliceID 1 --weight 30 --sliceType DL

• Update slice
  • DU_E2_NODE_ID: target DU's E2 Node ID (e.g., e2:4/e00/3/c8).
  • SCHEDULER_TYPE: scheduler type such as round robin (RR) and proportional fair (PF).
  • SLICE_ID: this slice's ID (e.g., 1).
  • WEIGHT: time frame rates (e.g., 30). It should be less than 80.
  • SLICE_TYPE: downlink (DL) or uplink (UL).

onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm update slice --e2NodeID <DU_E2_NODE_ID> --scheduler <SCHEDULER_TYPE> --sliceID <SLICE_ID> --weight <WEIGHT> --sliceType <SLICE_TYPE>

# example:
onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm update slice --e2NodeID e2:4/e00/3/c8 --scheduler RR --sliceID 1 --weight 50 --sliceType DL

• Delete slice
  • DU_E2_NODE_ID: target DU's E2 Node ID (e.g., e2:4/e00/3/c8).
  • SLICE_ID: this slice's ID (e.g., 1).
  • SLICE_TYPE: downlink (DL) or uplink (UL).

onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm delete slice --e2NodeID <DU_E2_NODE_ID> --sliceID <SLICE_ID> --sliceType <SLICE_TYPE>

# example:
onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm delete slice --e2NodeID e2:4/e00/3/c8 --sliceID 1 --sliceType DL

• UE-slice association
  • DU_E2_NODE_ID: target DU's E2 Node ID (e.g., e2:4/e00/3/c8).
  • SLICE_ID: this slice's ID (e.g., 1).
  • DRB_ID: DRB-ID for the bearer. It should be in onos-uenib.
  • DU_UE_F1AP_ID: DU_UE_F1AP_ID. It should be in onos-uenib.

onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm set association --dlSliceID <SLICE_ID> --e2NodeID <DU_E2_NODE_ID> --drbID <DRB_ID> --DuUeF1apID <DU_UE_F1AP_ID>

# example:
onos-cli$ kubectl exec -it deployment/onos-cli -n riab -- onos rsm set association --dlSliceID 1 --e2NodeID e2:4/e00/3/c8 --drbID 5 --DuUeF1apID 1240