公开(公告)号：US20040133641A1

公开(公告)日：2004-07-08

申请号：US10336523

申请日：2003-01-03

Applicant: NORTEL NETWORKS LIMITED

Inventor： Steve J. McKinnon ,  William Janning ,  Douglas S. Weisenberg

IPC: G06F015/16 ,  G06F015/173

CPC classification number: H04L67/24 ,  H04L67/14 ,  H04L67/142 ,  H04M3/42365 ,  H04M3/465 ,  H04M2203/404

Abstract: The present invention provides distributed communication services based on a presence technology platform. Presence messaging and communication techniques allow a variety of communication agents to cooperate with one another to provide distributed services. Essentially, the messaging between the agents is used to facilitate media sessions and update participating devices of state changes bearing on providing the services. In one embodiment, each of the participating devices is associated with a logic entity, referred to as a presentity, which subscribes to notification services for the other participating devices. When a state change occurs on any one of the participating devices, the corresponding presentity notifies the other devices of the state change. As such, each participating device knows the status of the other participating devices via the presentities and can systematically determine when and how to provide services based on its current state and the current state of the other participating devices.

Abstract translation: 本发明提供了基于存在技术平台的分布式通信服务。 存在消息和通信技术允许各种通信代理彼此协作以提供分布式服务。 基本上，代理之间的消息传递用于促进媒体会话并更新参与提供服务的状态变化的设备。 在一个实施例中，每个参与设备与被称为呈现器的逻辑实体相关联，逻辑实体订阅其他参与设备的通知服务。 当任何一个参与设备发生状态改变时，相应的存在体会通知其他设备状态改变。 因此，每个参与设备通过现实知道其他参与设备的状态，并且可以系统地基于其当前状态和其他参与设备的当前状态来系统地确定何时以及如何提供服务。