| 摘要 |
Simplification of IMS registration in the event of emergency calls is made possible by apparatuses and a method for setting up an emergency-call connection from a terminal (Figure 1: ~terminal~) to an IMS via a network (Figure 1: ~S-CSCF~, ~P-CSCF~, ~GGSN~, ~SGSN~, ~Radio Access Network~...) visited by the terminal, where, if the terminal is already registered in the IMS, setup of an emergency-call connection dispenses with IMS registration of the terminal in the IMS for this emergency-call connection if a comparison between a network identification (~network identifier~, Figure 1: ~MCC1~/~MNC1~) for the visited network, of which the terminal was notified when it registered in the visited network, and a network identification for the terminal's home network reveals a match between these network identifications.
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