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两个节点绑定的问题

tim jrt
Prodigy 151 points


我的理解，节点为了节能，节点通信都是定时睡眠+轮询。但是，在一个网络里，某两个节点绑定后，他们没有通过第三个点连接，这两个节点如果通信的话，接收数据的点，是不是应该一直保持接收状态啊？还是其他方式传输的？

  • 0
    TI__Mastermind 39047 points

    你是说zigbee吗？ 如果是coordinator和router都是主电源供电，一般是需要处于接收状态的。ED不路由，所以可以电池供电和周期性唤醒睡眠。采用polling方式，ED的父节点则会缓存到ED的数据，当ED轮询时转发数据给ED.

    Coordinator

    •Starts a non-beaconed PAN
    •Allows other devices to join it
    •Buffers messages for sleeping End Devices
    •Provides binding and address-table services
    •Routes messages
    •Dynamically repairs routing
    •Can have I/O capability
    •Manages security
    •Radio always on

    Router
    •Does not own or start PAN  (Scans to find a network to join)
    •Allows other devices to join it after PAN has been started
    •Routes messages
    •Dynamically repairs routing
    •Buffers messages for sleeping End Devices
    •Support secure messaging
    •Can have I/O capability
    •Radio always on
    End Device
    •Does not:
    –route messages
    –own or start network
    –allow other devices to join it
    •Scans to find a PAN to join
    •Polls parent to get messages (can be disabled)
    •Can be mobile
    •Radio/CPU can sleep
  • 0 回复 Yue TANG
    Prodigy 151 points

    谢谢TY解答，

    嗯，coordinator和router都是保持RX状态，ED都是polling他们获得数据。但对于绑定的这种间接通信，AB是ED， C是AB的parent，假设A和B有binding了，A是源绑定，那么实际通信的情况是，如果A发信息给B，是A先发给C，C在转发给B了对吧？？

    另外还想请教一个问题，对于OSAL的消息列队，A和B通信，A的发送功率大于B，但我的理解，当B给A发送很多消息，而B又发送不出去，就堆积在列队里，那如果超出了预设值，会不会直接指针跳飞了？？