Presence tracking for datagram based protocols with search
    2.
    发明申请
    Presence tracking for datagram based protocols with search 审中-公开
    基于数据报的协议的存在跟踪与搜索

    公开(公告)号:US20050108331A1

    公开(公告)日:2005-05-19

    申请号:US10698568

    申请日:2003-10-31

    申请人: Lawrence Osterman

    发明人: Lawrence Osterman

    IPC分类号: G06F15/16 H04L29/06 H04L29/08

    摘要: A presence tracking architecture for datagram-based protocols. A client application seeking to know the presence or lack thereof of a device and/or service utilizes a standard protocol in a non-intuitive way to trigger notification of the device and/or service before any associated timeout expires. At first presence, a multicast message is broadcast to notify all devices. Subsequently, on-demand notification may be requested by a client application by sending directly (e.g., in unicast) to the device before its timeout has expired a message that is normally only sent in multicast. If capable, the device can then respond normally with a unicast message indicating it is on-line. If the response is not received, the device and/or service is determined to be off-line.

    摘要翻译: 基于数据报的协议的存在跟踪架构。 寻求知道设备和/或服务的存在或不存在的客户端应用以非直观的方式使用标准协议来在任何相关超时到期之前触发设备和/或服务的通知。 首次存在时,广播多播消息以通知所有设备。 随后,客户应用程序可以通过直接(例如,单播)在超时之前通过在多播中正常发送的消息超时之前向设备请求按需通知。 如果有能力,设备就可以通过单播消息进行正常响应,表明它是在线的。 如果没有收到响应,则设备和/或服务被确定为脱机。