US 12,294,874 B2
Link failure detection between distributed unit (DU) and central unit control plane (CU-CP)
Siddhartha Chenumolu, Englewood, CO (US); Ash Khamas, Englewood, CO (US); Dhaval Mehta, Englewood, CO (US); and Gurpreet Sohi, Englewood, CO (US)
Assigned to DISH Wireless L.L.C., Englewood, CO (US)
Filed by DISH Wireless L.L.C., Englewood, CO (US)
Filed on Jun. 29, 2022, as Appl. No. 17/853,241.
Claims priority of provisional application 63/315,036, filed on Feb. 28, 2022.
Prior Publication US 2023/0276269 A1, Aug. 31, 2023
Int. Cl. H04J 3/14 (2006.01); H04L 41/0654 (2022.01); H04L 45/00 (2022.01); H04W 24/04 (2009.01); H04W 36/14 (2009.01); H04W 36/30 (2009.01); H04W 76/19 (2018.01); H04W 76/25 (2018.01); H04W 76/27 (2018.01); H04W 76/30 (2018.01)
CPC H04W 24/04 (2013.01) [H04L 41/0654 (2013.01); H04L 45/22 (2013.01); H04W 36/14 (2013.01); H04W 36/305 (2018.08); H04W 76/19 (2018.02); H04W 76/25 (2018.02); H04W 76/27 (2018.02); H04W 76/30 (2018.02)] 17 Claims
OG exemplary drawing
 
1. A method for managing user experiences during a cellular telecommunication network outage involving network communication failure detection, the method comprising:
a distributed unit (DU) of a fifth-generation New Radio (5G NR) cellular telecommunication network detecting there exists a failure in communication between the DU and a corresponding central unit control plane (CU-CP) of a 5G NR centralized unit (CU); and
performing different recovery actions in response to the failure in communication being due to a detected inactive network link to the CU-CP versus the CU-CP itself being initially indicated as inactive;
wherein the performing different recovery actions in response to the failure in communication being due to the detected inactive network link to the CU-CP versus the CU-CP itself being initially indicated as inactive includes:
the DU sending a CU-CP heartbeat request to an Internet Protocol (IP) address of the CU-CP at a pre-configured interval;
the DU re-trying for a preconfigured amount of time to send the CU-CP heartbeat request to the IP address of the CU-CP in response to not receiving a response to the CU-CP heartbeat request; and
in response to not receiving a response to the re-trying for the preconfigured amount of time to send the CU-CP heartbeat request to the IP address of the CU-CP, the DU sending a CU-CP default gateway heartbeat request to a default Gateway IP address of the CU-CP at a pre-configured interval.