Charging method and control device for group main line service

A charging method for group main line, GML, service, comprising:

• receiving a call to the GML and triggering an intelligent network, IN, service;
• redirecting the call to an extension of the GML according to a request from the calling party;
• checking, by a service control point, SCP, of the extension, the calling number upon receiving an initial detection point, IDP, message from a service switch point, SSP, of the calling party;
• and
• processing, by the SCP of the extension, the call to the extension as a call collectively paid by the GML, if there is a predefined special identification before the calling number.

A service control device, comprising:

• a service logic unit adapted to enable a corresponding service logic according to a call event reported by a service switch point, SSP, and issue a call control instruction to the SSP according to the service logic;
• and
• a charging unit adapted to charge a calling party or a called party in the call event and generate a call record;
• wherein the service control device further comprises:
• a called number checking unit adapted to check the called number in the call event, and inform the service logic unit to process the calling party as an extension collectively paid by the GML if there is a predefined prefix for group service before the called number.

A service control device, comprising:

• a service logic unit adapted to enable a corresponding service logic according to a call event reported by a service switch point, SSP, and issue a call control instruction to the SSP according to the service logic;
• and
• a charging unit adapted to charge a calling party or a called party in the call event and generate a call record;
• wherein the service control device further comprises:
• a calling number checking unit adapted to check an initial call message from an SSP of the calling party in the call event, and inform the service logic unit to process the called party as an extension collectively paid by the group main line, GML, if there is a predefined special identification code before the calling number in the initial call message.