Patent ID: 7882245

Claim:
A presence service system comprising: a presence service access device, a presence server, and a charging processing module; wherein the presence service access device is configured to: receive presence information published by a presentity; verify the presence information based on a predefined mode definition; acquire routing information from a tandem device, wherein the routing information comprises a subscription relationship between watchers and presentities, an ascription relationship between watchers and presence servers, and data of correspondence relationship between presence servers and presence service access devices; determine a corresponding watcher, which subscribes the published presence information of the presentity, based on the subscription relationship; determine a corresponding presence server based on the determined watcher and the ascription relationship between watchers and presence servers; determine a corresponding presence service access device based on the determined presence server and the data of the correspondence relationship between presence servers and presence service access devices; forward the presence information to the determined presence service access device, wherein the determined presence service access device is configured to transmit the presence information passing the verification to the determined presence server; wherein the presence server is configured to receive and store the presence information transmitted by the presence service access device and distribute the presence information to a watcher client; and wherein the charging processing module is configured to receive confirmation information returned by the presence server subsequent to publishing the presence information, generate an original call detail record and a charging record of the presence service based on the confirmation information, and transmit a charging file to a charging center.