User equipment steering across a wireless wide area disaggregated virtualized radio access network and a wireless local area radio access network

Patent metadata

Field	Value
Publication number	US-12160730-B2
Application number	US-202318345074-A
Country	US
Kind code	B2
Filing date	Jun 30, 2023
Priority date	Aug 11, 2021
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

Presented herein are techniques to facilitate wireless wide area (WWA) virtualized Radio Access Network (vRAN) (e.g., 5G) to wireless local area (WLA) RAN (e.g., Wi-Fi) steering or WLA RAN to WWA vRAN steering for one or more UE. In one example, a method may include obtaining first performance metrics associated with links of a WWA vRAN (e.g., fronthaul, midhaul, and backhaul links); obtaining second performance metrics associated with links WLA RAN (e.g., backhaul links); and in response to determining that one of the WWA vRAN is experiencing degraded performance based on the first performance metrics or the WLA RAN the second performance metrics, activating a steering event that causes, at least in part, an indication to be communicated to a UE to cause the UE to connect to the WWA vRAN or the WLA RAN that is not experiencing degraded performance.

First claim

What is claimed is:

1. A method comprising:
obtaining first performance metrics associated with a first plurality of links of a wireless wide area (WWA) virtualized Radio Access Network (vRAN), wherein the first plurality of links facilitate interconnection among a plurality of WWA radio units, at least one distributed unit, at least one central unit, and a mobile core network;
obtaining second performance metrics associated with a second plurality of links for a wireless local area (WLA) Radio Access Network (RAN), wherein the second plurality of links facilitate interconnection among a plurality of WLA radio nodes and a controller of the WLA RAN; and
in response to determining that one of the WWA vRAN is experiencing degraded performance based on the first performance metrics or the WLA RAN is experiencing degraded performance based on the second performance metrics, activating a steering event that causes, at least in part, an indication to be communicated to a user equipment (UE) to cause the UE to connect to the WWA vRAN or the WLA RAN that is not experiencing degraded performance.

2. The method of claim 1 , wherein the first performance metrics include link utilization for the first plurality of links, packet loss for the first plurality of links, and load for the plurality of WWA radio units, the at least one distributed unit, and the at least one central unit and wherein the second performance metrics include link utilization for the second plurality of links, packet loss for the second plurality of links, and load for the plurality of WLA radio nodes and the controller of the WLA RAN.

3. The method of claim 1 , wherein determining that one of the WWA vRAN or the WLA RAN is experiencing degraded performance includes determining one of:
that one or more of the first performance metrics satisfies one or more threshold levels to determine that the WWA vRAN is experiencing degraded performance; or
that one or more of the second performance metrics satisfies one or more threshold levels to determine that the WLA RAN is experiencing degraded performance.

4. The method of claim 3 , wherein upon determining that one or more of the first performance metrics satisfies the one or more threshold levels to determine that the WWA vRAN is experiencing degraded performance, the method includes determining that there is available capacity in the WLA RAN before activating the steering event.

5. The method of claim 4 , wherein based on determining that the WWA vRAN is experiencing degraded performance and that there is available capacity in the WLA RAN, upon obtaining a request from the UE to register with the mobile core network, the activated steering event is associated with providing a Non-Access Stratum (NAS) registration reject message to the UE including the indication to cause the UE to connect to the WLA RAN.

6. The method of claim 5 , wherein the indication communicated to the UE identifies at least one of:
that there is available capacity in the WLA RAN;
that the WWA vRAN is experiencing degraded performance for at least one of: one or more fronthaul links interconnecting the plurality of WWA radio units and the at least one distributed unit, one or more midhaul links interconnecting the at least one distributed unit and at least one central unit, and one or more backhaul links interconnecting the at least one central unit and the mobile core network; and
a list of one or more of the plurality of WLA radio nodes of the WLA RAN with which the UE can connect.

7. The method of claim 4 , wherein based on determining that the WWA vRAN is experiencing degraded performance and that there is available capacity in the WLA RAN, the activated steering event is associated with providing, via at least one WWA radio unit, a broadcast including the indication to cause the UE to connect to the WLA RAN, wherein the indication identifies at least one of:
that there is available capacity in the WLA RAN; and
that the WWA vRAN is experiencing degraded performance for at least one of: one or more fronthaul links interconnecting the plurality of WWA radio units and the at least one distributed unit, one or more midhaul links interconnecting the at least one distributed unit and at least one central unit, and one or more backhaul links interconnecting the at least one central unit and the mobile core network.

8. The method of claim 4 , wherein based on determining that the WWA vRAN is experiencing degraded performance and that there is available capacity in the WLA RAN, upon obtaining a request to establish a quality of service flow for the UE, the activated steering event is associated with providing a Non-Access Stratum (NAS) protocol data unit (PDU) session establishment reject message to the UE including the indication to cause the UE to connect to the WLA RAN.

9. The method of claim 8 , wherein the indication communicated to the UE identifies at least one of:
that there is available capacity in the WLA RAN;
that the WWA vRAN is experiencing degraded performance for at least one of: one or more fronthaul links interconnecting the plurality of WWA radio units and the at least one distributed unit, one or more midhaul links interconnecting the at least one distributed unit and at least one central unit, and one or more backhaul links interconnecting the at least one central unit and the mobile core network; and
a list of one or more of the plurality of WLA radio nodes of the WLA RAN with which the UE can connect.

10. The method of claim 4 , wherein based on determining that the WWA vRAN is experiencing degraded performance and that there is available capacity in the WLA RAN, the activated steering event is associated with updating an Access Traffic Steering, Switching, and Splitting (ATSSS) policy based on updated WWA vRAN and WLA RAN sharing rules to cause the UE to connect to the WLA RAN.

11. The method of claim 3 , wherein upon determining that one or more of the second performance metrics satisfies the one or more threshold levels to determine that the WLA RAN is experiencing degraded performance, the method includes determining that there is available capacity in the WWA vRAN before activating the steering event.

12. The method of claim 11 , wherein based on determining that the WLA RAN is experiencing degraded performance and that there is available capacity in the WWA vRAN, upon obtaining a Wi-Fi association request from the UE, the activated steering event is associated with providing an Wi-Fi association response reject message including the indication to cause the UE to connect to the WWA vRAN, wherein the indication identifies at least one of:
that the WLA RAN is experiencing degraded performance;
that there is available capacity in the WWA vRAN; and
a list of one or more of one or more radio units of the WWA vRAN with which the UE can connect.

13. The method of claim 11 , wherein based on determining that the WLA RAN is experiencing degraded performance and that there is available capacity in the WWA vRAN, the activated steering event is associated with providing, via at least one WLA radio node of the plurality of WLA radio nodes of the WLA RAN, a broadcast including the indication to cause the UE to connect to the WWA vRAN, wherein the indication identifies at least one of:
that the WLA RAN is experiencing degraded performance; and
that there is available capacity in the WWA vRAN.

14. The method of claim 13 , wherein the indication is provided via a quality of service (QOS) enhanced basic service set (QBSS) Information Element (IE).

15. One or more non-transitory computer readable storage media encoded with instr

Assignees

• Cisco Tech Inc

Inventors

• Gundavelli Srinath
• Gandhi Indermeet Singh
• Grayson Mark

Classifications

• H04W36/304

  due to measured or perceived resources with higher communication quality · CPC title

• H04W36/0085 Primary

  Hand-off measurements · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W24/02

  Arrangements for optimising operational condition · CPC title

• H04W36/22 Primary

  for handling the traffic · CPC title