| 摘要 |
A method for realizing the presence service is disclosed. By using recording the relation between the observer ID and the class ID into the authentication configurating information of observer, and during the presence body issuing presence information, associates the presence information with the class ID, the presence server determines the presence information which is available by the observer according to the relation between the class ID, and the observer ID and the presence information. A system for realizing the presence service, a presence information processing device and a presence body client are also disclosed. By using the present method, system, device or client, the same presence information element of the same one presence body can present different value to different observer at the same time, and before the presence information is transmitted to the observer, the presence server deletes the class ID information contained in the presence information file, thus the privacy of the presence body can be protected.
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