Apparatus for collecting charging information of a data service and charging method thereof

A system applied in a wireless network for collecting charging information of a data service, the system comprising a proxy device and a charging system,

• the proxy device comprising:
• a protocol distribution processing module configured to classify first service data according to a protocol type of the first service data which is received from a Mobile Station (MS) via a gateway service node in the wireless network and to send the classified first service data to one of a plurality of protocol processing modules corresponding to the protocol type of the first service data wherein the first service data comprises at least one of the following:
• Hyper Text Transfer Protocol (HTTP) service data, Wireless Application Protocol (WAP) service data, Transmission Control Protocol/Internet Protocol (TCP/IP) service data or Real Time Protocol/ Real Time Session Protocol (RTP/RTSP) service data;
• said one of the plurality of protocol processing modules, each of which corresponds to a protocol type, configured to receive the classified first service data from the MS via the protocol distribution processing module corresponding to the protocol type, extract charging information of the classified first service data, wherein the charging information comprises the protocol type of the first service data, send the charging information of the classified first service data to a charging system for charging by a charging mode corresponding to the protocol type of the first service data, and transmit the classified first service data transparently to a packet switched domain network;
• and
• the charging system configured to, when a service server has collected charging information of second service data having a second protocol type and the second service data has been charged based on one charging mode according to the collected charging information of the second service data at the service server by the charging system, determine if the first service data from which the charging information is extracted at the proxy device has the same protocol type as the second service data from which the charging information is extracted at the service server according to the charging information of the first service data collected by the proxy device, wherein
• if the first service data has a different protocol type than the second service data, the charging system is configured to charge the first service data by a charging mode corresponding to the protocol type of the classified first service data received at the proxy device, wherein the first service data is classified by the protocol type, wherein the charging modes of data services include a volume based charging mode and a content based charging mode;
• and
• if the first service data has the same protocol type as the second service data, the charging system is configured to not charge for the first service data according to the charging information of the first service data collected at the proxy device.