Service switching point and system for creating detailed charging information

A service switching point equipped with a switching function and connected via a communication network to a service control point equipped with an additional service control function, the service switching point comprising:

• means for receiving, via the communication network, first charging information, related to the additional service from the service control point, the first charging information created by the service control point when the additional service has been requested by a subscriber;
• means for creating second charging information unique to an ordinary service, the second charging information to be used as part of detailed charging information;
• and
• means for creating detailed charging information by combining the first charging information, which is sent from said service control point, with the second charging information, which is created in the service switching point, the detailed charging information including a charging information identifier, a charging information field length, a basic part in which the second charging information is entered a plurality of extended parts and a stopper indicating end of the charging information;
• the first charging information having a structure identical to a structure of the extended part, the first charging information includes a first charging information identifier, an additional-information length and a name of the additional service;
• and
• said means for creating the detailed charging information creates the detailed charging information by placing the first charging information as an extended part after the extended part of second charging information and placing the stopper after the first charging information.

A system for creating detailed charging information for an additional service, comprising:

• a service switching point having a service switching function;
• a service control point having an additional service control function, said service control point having a data base for storing various data for an additional service and means for executing the additional-service control, upon referring to data stored in the data base, when an additional service has been requested, and for creating first charging information which is unique to the additional-service for use as part of detailed charging information and transmitting the first charging information to a service switching point;
• a network for performing an exchange of signals between these two points;
• and
• said service switching point having:
• means for creating second charging information including charging information different from the first charging information, for use as part of the detailed charging information;
• and
• means for creating the detailed charging information by combining the first charging information, which is sent from said service control point, with the second charging information, which is created in the service switching point.