Authentication vector (AV) requesting and dispatching method involves generating AV based on type of service, and sending third message containing AV to IMS network

摘要

An HLR determines if an AV request is from an IMS service, a global system for mobile communications (GSM)/general packet radio service (GPRS) service or universal mobile telecommunication system (UMTS) service. An authentication center in the HLR generates the AV with a key associated with the subscriber identity, IMPI. The HLR sends a third message containing the AV to an IMS network. A first message requesting for the AV to authenticate a subscriber requesting IMS service is received by an HSS through an IMS network. The HSS processes the first message and sends a second message to the HLR.