US 11,758,455 B2
Distributed unit (DU) failover techniques for high reliability virtualized radio access network architectures
Fred Jay Anderson, Lakeville, OH (US); Indermeet Singh Gandhi, San Jose, CA (US); Mark Grayson, Berkshire (GB); and Shailender Potharaju, Fremont, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Feb. 22, 2021, as Appl. No. 17/181,715.
Prior Publication US 2022/0272594 A1, Aug. 25, 2022
Int. Cl. H04W 36/10 (2009.01); H04W 36/16 (2009.01)
CPC H04W 36/10 (2013.01) [H04W 36/165 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
maintaining, by a management node for a virtualized Radio Access Network (vRAN), service information for a plurality of distributed unit components for the vRAN, wherein the service information identifies, at least in part, service characteristics and failover rules for the plurality of distributed unit components in relation to a plurality of radio units for the vRAN, wherein the service characteristics are based on service measurements performed for the plurality of distributed unit components and the plurality of radio units for the vRAN and the service measurements comprise a current radio unit capacity and a current traffic usage for each of the plurality of distributed unit components, a current latency for each of one or more radio units assigned to each of the plurality of distributed unit components, and a current latency for each of one or more other radio units that are not assigned to each of the plurality of distributed unit components;
determining a failure of a particular distributed unit component of the plurality of distributed unit components, wherein one or more particular radio units are assigned to the particular distributed unit component prior to the failure; and
causing the one or more particular radio units to be reassigned to one or more other distributed unit components of the plurality of distributed unit components based on the service characteristics maintained in the service information and particular failover rules identified in the service information that are associated with each of the one or more particular radio units that are re-assigned.