Efficient changing of address information using NAT and NAPT routers with separate transmission of payload data and signaling information

The method as claimed in one of the preceding claims, characterized in that

• the address information comprises IP (Internet protocol) addresses and/or port addresses.

The method as claimed in one of the preceding claims, characterized in that

• the BICC (bearer independent call control) protocol, the SIP-T (session initiation protocol) or an ISUP (ISDN user part) protocol adapted for packet network transmission of payload data is used as signaling protocol.

The method as claimed in one of the preceding claims, characterized in that

• a new INAP parameter is defined which comprises the address information to be changed, and
• the address information to be changed is transmitted from the SSP to the SCP with the aid of this INAP parameter.

The method as claimed in one of the preceding claims, characterized in that

• at least one of the INAP procedures INITIAL DP, CONNECT, EventReportBCSM and ContinueWithArgument is used for the changing of address information, the INAP procedures used being adapted for the transmission of address information or, respectively, of the information element BEARER CONTROL INFORMATION.

The method as claimed in one of the preceding claims, characterized in that

• the functions of the SSP are implemented in a media gateway controller (MGC).

The method as claimed in one of the preceding claims, characterized in that

• the functions of the SSP are implemented in a CMN (call mediation node).

The method as claimed in one of the preceding claims, characterized in that

• address information is changed during the setting-up of a connection,
• in order to change address information, an APP (application transport parameter) of an IAM (initial address message) is evaluated for address information, and
• address information of the APP parameter is changed.