| 摘要 |
A SECURITY MODE METHOD (200) RECEIVES (210) A LAYER 3 MESSAGE IN A FIRST DOMAIN FROM A NETWORK, DETERMINES (220) IF THE LAYER 3 MESSAGE HAS INTEGRITY PROTECTION INFORMATION, ASCERTAINS (240) IF A SECURITY MODE HAS BEEN INITIATED IN THE FIRST DOMAIN, AND FORWARDS (260) THE LAYER 3 MESSAGE TO AN UPPER LAYER, IF THE LAYER 3 MESSAGE LACKS INTEGRITY PROTECTION INFORMATION AND A SECURITY MODE HAS NOT BEEN INITIATED IN THE FIRST DOMAIN EVEN IF SECURITY MODE HAS BEEN INITIATED IN A SECOND DOMAIN. THIS METHOD ALLOWS A MOBILE STATION TO PROCESS A NON-INTEGRITY-PROTECTED LAYER 3 MESSAGE FROM ONE DOMAIN EVEN IF INTEGRITY PROTECTION HAS BEEN INITIATED IN ANOTHER DOMAIN. WHEN PACKET-SWITCHED AND CIRCUIT-SWITCHED CONNECTIONS ARE BEING CONCURRENTLY SET UP, ANON-INTEGRITY-PROTECTED MESSAGE IN ONE DOMAIN MAY ARRIVE AT A MOBILE STATION AFTER AN INTEGRITY PROTECTION INITIATION MESSAGE IN ANOTHER DOMAIN. |
