Abstract: A message processing method, device, and system are provided in the embodiments of the present invention. The method comprises: receiving service messages and identifying the protocol type of the service messages; performing protocol adaptation according to the protocol type; and reconstructing the content of the service messages after protocol adaptation according to the corresponding content reconstructing policies and sending the service messages after content reconstructing. The present invention implements information embedment into the content over different protocols without proxy server settings.

Abstract: A service charging method, including: receiving a service packet, performing a protocol resolution on the service packet and obtaining charging information when determining that the protocol resolution needs to be performed on the service packet; and performing a service charging according to the charging information and a preset charging policy. The invention further provides a service charging system, a network access server and a protocol resolving device. Thus, it is easier and more convenient for a user to use a service, and no complex traffic back-patching solution needs to be implemented.

Abstract: An advice of charging (AoC) method, system, and mobile terminal thereof are provided. The method includes receiving AoC information sent by a service charging server, and then displaying the AoC information. The mobile terminal includes a receiving module adapted to receive AoC information sent by a service charging server, and a display module adapted to display the received AoC information. The system includes a terminal, a service charging server, a service gateway, and a charging engine. The present invention is applicable to pre-consumption prompt, post-consumption notification, and prompts for data services such as browsing, streaming media, and mail.