Wireless communication network fault recovery using integrated access and backhaul
A wireless access node detects a fault and scans for a wireless Integrated Access and Backhaul (IAB) service. A network controller also detects the fault and signals a neighbor access node to initiate the wireless IAB service. The wireless access node wirelessly exchanges fault data with the neighbor access node over the wireless TAB service. The neighbor access node exchanges the fault data with the network controller in response to the signaling. The wireless access node recovers from the fault in response to the fault data.
1. A method of operating a wireless communication network to recover from a fault, the method comprising:
a wireless access node wirelessly exchanging user data with wireless user devices and exchanging the user data with the wireless communication network;
the wireless access node detecting the fault and responsively scanning for a wireless Integrated Access and Backhaul (IAB) service;
a network controller detecting the fault and responsively transferring signaling to a neighbor access node to initiate the wireless IAB service;
the wireless access node wirelessly exchanging fault data with the neighbor access node over the wireless IAB service;
the neighbor access node wirelessly exchanging the fault data with the wireless access node over the wireless IAB service and exchanging the fault data with the network controller responsive to the signaling;
the wireless access node recovering from the fault in response to the fault data; and
the wireless access node wirelessly exchanging additional user data with wireless user devices and exchanging the additional user data with the wireless communication network.
2. The method of claim 1 further comprising:
a User Plane Function (UPF) exchanging the user data with the wireless access node;
the UPF detecting the fault and responsively transferring an alarm; and
wherein the network controller detecting the fault comprises receiving the alarm.
3. The method of claim 1 further comprising:
an Access and Mobility Management Function (AMF) exchanging the other signaling with the wireless access node;
the AMF detecting the fault and responsively transferring an alarm; and
wherein the network controller detecting the fault comprises receiving the alarm.
4. The method of claim 1 wherein the wireless access node detecting the fault and responsively scanning for the wireless IAB service comprises a Radio Resource Control (RRC) detecting a backhaul signal impairment and a Physical Layer (PHY) detecting an IAB broadcast for the wireless IAB service from the neighbor access node.
5. The method of claim 1 wherein:
the wireless access node wirelessly exchanging the user data and the additional user data with the wireless user devices comprises radio circuitry exchanging the user data and the additional user data with the wireless user devices; and
the wireless access node scanning for the wireless IAB service, transferring the signaling for the wireless IAB service, and exchanging the fault data for the wireless IAB service comprises the radio circuitry scanning for the wireless IAB service, transferring the signaling for the wireless IAB service, and exchanging the fault data for the wireless IAB service.
6. The method of claim 1 wherein the neighbor access node wirelessly exchanging the fault data with the wireless access node over the wireless IAB service responsive to the signaling comprises the neighbor access node wirelessly transferring an IAB broadcast for the wireless IAB service responsive to the signaling.
7. The method of claim 1 wherein the neighbor access node wirelessly exchanging the fault data with the wireless access node over the wireless IAB service responsive to the signaling comprises the neighbor access node periodically wirelessly transferring an IAB broadcast for the wireless IAB service responsive to the signaling.
8. The method of claim 1 wherein the fault comprises a backhaul failure between the wireless access node and the wireless communication network.
9. The method of claim 1 wherein the fault comprises a cell-site router failure at the wireless access node.
10. The method of claim 1 wherein the fault comprises an ethernet switch failure at the wireless access node.
11. A wireless communication network to recover from a fault, the wireless communication network comprising:
a wireless access node configured to wirelessly exchange user data with wireless user devices and exchange the user data with the wireless communication network;
the wireless access node configured to detect the fault and responsively scan for a wireless Integrated Access and Backhaul (IAB) service;
a network controller configured to detect the fault and responsively transfer signaling to a neighbor access node to initiate the wireless TAB service;
the wireless access node configured to wirelessly exchange fault data with the neighbor access node over the wireless TAB service;
the neighbor access node configured to wirelessly exchange the fault data with the wireless access node over the wireless TAB service and exchange the fault data with the network controller responsive to the signaling;
the wireless access node configured to recover from the fault in response to the fault data; and
the wireless access node configured to wirelessly exchange additional user data with wireless user devices and exchanging the additional user data with the wireless communication network.
12. The wireless communication network of claim 11 further comprising:
a User Plane Function (UPF) configured to exchange the user data with the wireless access node;
the UPF configured to detect the fault and responsively transfer an alarm; and
wherein the network controller is configured to detect the fault by receiving the alarm.
13. The wireless communication network of claim 11 further comprising:
an Access and Mobility Management Function (AMF) configured to exchange the other signaling with the wireless access node;
the AMF configured to detect the fault and responsively transfer an alarm; and
wherein the network controller is configured to detect the fault by receiving the alarm.
14. The wireless communication network of claim 11 wherein the wireless access node comprises a Radio Resource Control (RRC) configured to detect a backhaul signal impairment and a Physical Layer (PHY) configured to detect an IAB broadcast for the wireless IAB service from the neighbor access node.
15. The wireless communication network of claim 11 wherein the wireless access node comprises radio circuitry configured to wirelessly exchange the user data and the additional user data with the wireless user devices, scan for the wireless IAB service, transfer the signaling for the wireless IAB service, and exchange the fault data for the wireless IAB service.
16. The wireless communication network of claim 11 wherein the neighbor access node is configured to wirelessly transfer an IAB broadcast for the wireless IAB service responsive to the signaling.
17. The wireless communication network of claim 11 wherein the neighbor access node is configured to periodically wirelessly transfer an IAB broadcast for the wireless IAB service responsive to the signaling.
18. The wireless communication network of claim 11 wherein the fault comprises a backhaul failure between the wireless access node and the wireless communication network.
19. The wireless communication network of claim 11 wherein the fault comprises a cell-site router failure at the wireless access node.
20. The wireless communication network of claim 11 wherein the fault comprises an ethernet switch failure at the wireless access node.