US 12,137,086 B2
Method for robust token generation in 5G mobile core network
Ravi Shankar Mantha, Bangalore (IN); and Krishna Chaitanya Mahamkali, Bangalore (IN)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Jul. 20, 2022, as Appl. No. 17/869,157.
Prior Publication US 2024/0031347 A1, Jan. 25, 2024
Int. Cl. H04L 9/40 (2022.01)
CPC H04L 63/08 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method performed at a network function (NF) repository function (NRF) of a core network, the method comprising:
upon receiving, from a consumer NF, a request to access services of a producer NF, issuing, to the consumer NF, an access token used to access the services, based on allowed authorization attributes for the producer NF and the consumer NF;
before expiry of the access token, receiving, from the producer NF, an update message that indicates retiring authorization attributes of the allowed authorization attributes that will retire at a future time, and storing the retiring authorization attributes; and
before the expiry of the access token and before the retiring authorization attributes retire:
upon receiving, from the consumer NF, a new access token request for a new access token for accessing the services of the producer NF, determining not to authorize the new access token request based on the retiring authorization attributes; and
based on determining, sending, to the consumer NF, an access token error that provides notice to the consumer NF to migrate service requests to a new producer NF before the expiry and before the retiring authorization attributes retire.