Failure scenarios in a virtualized radio access network (vRAN) environment raise a number of challenges. For example, enterprise customers with their mission-critical and factory automation use-cases are demanding redundancy at every possible element in a vRAN since every millisecond of delay caused by, for example, a Centralized Unit (CU) failure may result in a factory floor coming to a standstill. To address these types of challenges, techniques are presented herein that support CU redundancy in a vRAN architecture (through, among other things, the addition of a standby CU) without negatively impacting radio operations or user equipment (UE) connections or triggering a signaling storm. Among other things, a standby CU may come up either as a Centralized Unit Control Plane (CU-CP) or a Centralized Unit User Plane (CU-UP) depending upon the specific element which failed.
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Gandhi, Indermeet; Potharaju, Shailender; Talati, Shail; and Khanna, Arun, "STATEFUL CENTRALIZED UNIT REDUNDANCY WITHOUT IMPACTING DISTRIBUTED UNIT OR RADIO OPERATIONS IN VRAN ARCHITECTURES", Technical Disclosure Commons, (April 14, 2021)