FIELD: information technologies.
SUBSTANCE: when it is detected that subscriber data has been lost as a result of, for instance node reboot, S-CSCF sends a signal SIP RESET to notify the nearest P-CSCF about loss of subscriber data. Receiving SIP RESET signal, P-CSCF searches for subscribers, which are registered in S-CSCF, sending SIP RESET signal. If such are available, P-CSCF controls flag by registration information of P-CSCF for detection of the fact that subscriber data has been lost in S-CSCF and sends SIP REGISTER signal into S-CSCF. Receiving SIP REGISTER signal, S-CSCF recovers lost subscriber data from subscriber data base HSS, processing registration according to existing procedures.
EFFECT: speeding up procedures of authorising provision of transmission and reception services.
20 cl, 10 dwg
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