发明授权
US08193934B2 Method for using recording rules and previous value selection rules for presence information in a communications system 有权
在通信系统中使用记录规则和存在信息的先前值选择规则的方法

Method for using recording rules and previous value selection rules for presence information in a communications system
摘要:
In a communications system, a presence server maintains and distributes presence information in accordance with recording rules and previous value selection rules. The presence server: associates a recording rule with each presence information element in a subset of a plurality of presence information elements for a presentity; maintains a set of previous values according to the recording rule associated with the presence information element, for each presence information element in the subset; receives an initial subscribe request from a watcher for one or more presence information elements in the subset; and in response to the initial subscribe request, notifies the watcher of a number of the previous values maintained for each presence information elements in the subscribe request, wherein the number of the previous values that is sent is determined by a previous value selection rule associated with each presence information element.
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