US 11,876,838 B2
Lawful interception chain in service providing networks
Amedeo Imbimbo, Caivano (IT); Mario Ascione, Torre del Greco (IT); and Francesca Marfia, Pagani (IT)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/281,788
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
PCT Filed Oct. 4, 2018, PCT No. PCT/SE2018/051016
§ 371(c)(1), (2) Date Mar. 31, 2021,
PCT Pub. No. WO2020/071972, PCT Pub. Date Apr. 9, 2020.
Prior Publication US 2021/0385255 A1, Dec. 9, 2021
Int. Cl. H04L 9/40 (2022.01); H04L 47/34 (2022.01)
CPC H04L 63/306 (2013.01) [H04L 47/34 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method performed by a network operator providing a lawful interception, LI, service to a law enforcement agency, LEA, the method comprising:
determining a chain identifier, chainID, based on a target type related to an LI target, a target identifier related to the LI target, a Lawful Interception Identifier uniquely associated with an intercept request, and a correlation number for a service session of the LI target; and
transmitting packets related to the service session to the LEA as a unique chain, each packet including a chain header and at least one of intercept related information, IRI, and content of communication, CC,
wherein the chain header includes the chainID, a timestamp and a sequence number, which is a packet counter, and wherein the chain header of a first packet transmitted for the service session also includes the target type, the target identifier, the Lawful Interception Identifier, and the correlation number.