METHOD AND SYSTEM FOR PERFORMING TIME SYNCHRONIZATION BETWEEN NODES IN WIRELESS COMMUNICATION SYSTEM
    1.
    发明申请
    METHOD AND SYSTEM FOR PERFORMING TIME SYNCHRONIZATION BETWEEN NODES IN WIRELESS COMMUNICATION SYSTEM 有权
    在无线通信系统中执行节点之间的时间同步的方法和系统

    公开(公告)号:US20100157975A1

    公开(公告)日:2010-06-24

    申请号:US12641864

    申请日:2009-12-18

    IPC分类号: H04J3/06

    CPC分类号: H04J3/0682 H04W56/0015

    摘要: A method is provided for synchronizing time between nodes in a wireless communication system. A reference node transmits a first packet to a correspondent node. Upon receiving the first packet, the correspondent node transmits a second packet with a reception time of the first packet recorded therein, to the reference node. Upon receiving the second packet, the reference node calculates a forward delay time using a transmission time and the reception time of the first packet. The correspondent node receives a third packet with the forward delay time from the reference node, and calculates a reverse delay time. The correspondent node calculates an offset value for the synchronization using the forward delay time and the reverse delay time.

    摘要翻译: 提供了一种用于在无线通信系统中的节点之间同步时间的方法。 参考节点向对应节点发送第一分组。 在接收到第一分组时,通信节点将其中记录有第一分组的接收时间的第二分组发送到参考节点。 在接收到第二分组时,参考节点使用传输时间和第一分组的接收时间来计算前向延迟时间。 通信节点从参考节点接收具有前向延迟时间的第三个分组,并计算反向延迟时间。 通信节点使用前向延迟时间和反向延迟时间来计算同步的偏移值。

    METHOD FOR POWER CONSUMPTION IN WIRELESS SENSOR NETWORK
    2.
    发明申请
    METHOD FOR POWER CONSUMPTION IN WIRELESS SENSOR NETWORK 失效
    无线传感器网络中消耗功率的方法

    公开(公告)号:US20100124209A1

    公开(公告)日:2010-05-20

    申请号:US12622916

    申请日:2009-11-20

    IPC分类号: H04B7/212

    摘要: A method for reducing power consumption in a wireless sensor network is provided. An optimized path destined for a sink node is set using a common channel in which first and second nodes use a CSMA scheme. A first channel is set and transmission/reception slots for packet transmission/reception arc allocated in the first channel. A packet is transmitted to the second node through a first transmission slot using a TDMA scheme. When a packet is not received from the second node through a first reception slot within a first set amount of time, the first reception slot is allowed to transition to an inactive state. The first node is one of the sink node, at least one parent node, and at least one child node of the parent node, and the second node is one of child nodes of the first node.

    摘要翻译: 提供了一种用于降低无线传感器网络中的功耗的方法。 使用公共信道来设置目的地为汇聚节点的优化路径,其中第一和第二节点使用CSMA方案。 设置第一信道,并且在第一信道中分配用于分组发送/接收的发送/接收时隙。 使用TDMA方案通过第一传输时隙将分组发送到第二节点。 当在第一设定时间量内没有通过第一接收时隙从第二节点接收到分组时,允许第一接收时隙转变到非活动状态。 第一节点是汇聚节点,至少一个父节点和父节点的至少一个子节点之一,而第二节点是第一节点的子节点之一。