US 12,289,288 B2
Method and apparatus for processing DNS query and response messages, by an edge application server discovery function (EASDF) of a communication network, in accordance with handling rules
Klaus Hoffmann, Munich (DE); and Shubhranshu Singh, Munich (DE)
Assigned to NOKIA SOLUTIONS AND NETWORKS OY, Espoo (FI)
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
Filed on Aug. 8, 2023, as Appl. No. 18/446,422.
Claims priority of application No. 22189494 (EP), filed on Aug. 9, 2022.
Prior Publication US 2024/0056417 A1, Feb. 15, 2024
Int. Cl. H04L 61/4511 (2022.01); H04L 67/141 (2022.01); H04W 80/12 (2009.01); H04L 101/668 (2022.01)
CPC H04L 61/4511 (2022.05) [H04L 67/141 (2013.01); H04W 80/12 (2013.01); H04L 2101/668 (2022.05)] 16 Claims
OG exemplary drawing
 
1. A method for use by an edge application server discovery function (EASDF) of a communication network, the method comprising:
receiving a domain name server (DNS) query message from a user equipment; and
based on the DNS query message received from the user equipment not including information regarding an extension mechanism for DNS (EDNS) client subnet option:
in accordance with a first handling rule, including, into the DNS query message, first information regarding an EDNS client subnet option, and forwarding the DNS query message including the first information regarding the EDNS client subnet option to a domain name server;
receiving a DNS response message from the domain name server, the DNS response message including a response to the DNS query and second information regarding an EDNS client subnet option; and
in accordance with a second handling rule, removing, from the DNS response message the second information regarding the EDNS client subnet option, and forwarding the DNS response message without the second information regarding the EDNS client subnet option to the user equipment.