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    • 3. 发明申请
    • SYSTEM AND METHOD FOR ACKNOWLEDGEMENT PACKET TRANSMITTING AND RECEIVING
    • 用于确认分组传输和接收的系统和方法
    • WO2010033260A1
    • 2010-03-25
    • PCT/US2009/032262
    • 2009-01-28
    • QUALCOMM INCORPORATEDJIA, ZhanfengTIAN, QingjiangJULIAN, David, Jonathan
    • JIA, ZhanfengTIAN, QingjiangJULIAN, David, Jonathan
    • H04L1/16H04L1/18
    • H04L1/1607H04B2001/6908H04L1/1854
    • A communications method comprising the steps of receiving a data packet; processing the data packet; and transmitting an ack packet approximately at an end of a first defined time interval if the processing of the data packet is completed within the first defined interval, or transmitting the ack packet approximately at an end of a second defined time interval if the processing of the data packet is not completed within the first defined interval and is completed within the second defined interval. Another communication method comprising the steps of transmitting a data packet; scanning a channel for an ack packet approximately at an end of a first defined time interval from the transmission of the data packet; and scanning the channel for the ack packet approximately at an end of a second defined time interval from the transmission of the data packet if the ack packet was not received within the first defined interval.
    • 一种通信方法,包括以下步骤:接收数据分组; 处理数据包; 以及如果在所述第一定义的间隔内完成所述数据分组的处理,则在第一定义的时间间隔的结尾处大致发送确认分组,或者如果所述第一定义的时间间隔的处理 数据分组在第一定义的间隔内未完成,并且在第二定义的间隔内完成。 另一种通信方法包括以下步骤:发送数据分组; 从数据分组的发送开始,在第一定义的时间间隔结束时扫描一个用于确认分组的信道; 以及如果在所述第一定义的间隔内没有接收到所述确认分组,则在从所述数据分组的发送开始的第二定义的时间间隔的结束时,大致对所述确认分组的所述信道进行扫描。
    • 6. 发明申请
    • TWO-WAY RANGING WITH INTER-PULSE TRANSMISSION AND RECEPTION
    • 双脉冲传输和接收两路测距
    • WO2010022273A1
    • 2010-02-25
    • PCT/US2009/054519
    • 2009-08-20
    • QUALCOMM INCORPORATEDEKBAL, AmalJULIAN, David, JonathanJIA, Zhanfeng
    • EKBAL, AmalJULIAN, David, JonathanJIA, Zhanfeng
    • G01S13/76
    • G01S13/765
    • Relatively short turnaround times are provided in conjunction with two-way ranging to, for example, facilitate accurate ranging measurements when the relative clock drift between ranging nodes (e.g., devices) is relatively high. In some aspects, relatively short turnaround times are achieved through the use of a symmetric channel that is defined to enable concurrent transmission of ranging messages between nodes. For example, a symmetric channel may be established by configuring the nodes to receive one or more pulses associated with a received ranging message in between pulse transmissions associated with a transmitted ranging message. In this way, one node may send a ranging timestamp shortly after the other nodes sends its ranging timestamp, thereby mitigating the impact of the clock drift on the ranging measurements. In some aspects the pulses may comprise ultra-wideband pulses. The techniques described herein may be employed to provide two-way ranging in, for example, low power and/or non-coherent wireless devices.
    • 结合双向测距提供相对短的周转时间,例如,当测距节点(例如,设备)之间的相对时钟漂移相对较高时,便于进行准确的测距测量。 在一些方面,通过使用被定义为能够在节点之间并行传送测距消息的对称信道来实现相对短的周转时间。 例如,可以通过将节点配置为在与传送的测距消息相关联的脉冲传输之间接收与接收到的测距消息相关联的一个或多个脉冲来建立对称信道。 以这种方式,一个节点可以在其他节点发送其测距时间戳之后不久发送测距时间戳,从而减轻时钟漂移对测距测量的影响。 在一些方面,脉冲可以包括超宽带脉冲。 本文描述的技术可以用于在例如低功率和/或非相干无线设备中提供双向测距。
    • 9. 发明申请
    • KEEP-ALIVE FOR WIRELESS NETWORK
    • 保持无线网络
    • WO2009036097A1
    • 2009-03-19
    • PCT/US2008/075901
    • 2008-09-10
    • QUALCOMM INCORPORATEDJIA, ZhanfengJULIAN, David, Jonathan
    • JIA, ZhanfengJULIAN, David, Jonathan
    • H04W72/12
    • H04L12/189H04L12/1863H04L67/14H04L67/145H04L67/325H04W52/0216H04W76/25Y02D70/142Y02D70/146Y02D70/26
    • A transmitting device transmits data to one or more receiving devices. At least one of the receiving devices transmits a keep-alive to the transmitting device. The keep-alive is transmitted at a reduced rate relative to the data transmission rate. In some implementations multiple receiving devices may transmit keep-alives. In these cases, each receiving device may transmit its keep-alives according to a schedule to prevent or reduce the likelihood of overlapping keep-alives. In some implementations a receiving device may be selected to transmit keep-alives. Here, if the selected receiving device stops transmitting keep-alives another receiving device is selected to transmit keep-alives. Through the use of the above techniques, the transmitting device need not keep track of which receiving devices are listening to the data transmission. Rather, the transmitting device may simply stop transmitting in the event that it no longer receives keep-alives.
    • 发送设备向一个或多个接收设备发送数据。 至少一个接收设备向发送设备发送保持活动。 保持活动以相对于数据传输速率的降低的速率传输。 在一些实施方式中,多个接收设备可以传送保持活动。 在这些情况下,每个接收设备可以根据时间表发送其保持活动,以防止或减少保留重叠的可能性。 在一些实施方式中,可以选择接收设备来传送保活。 这里,如果选择的接收设备停止发送保持活动,则选择另一个接收设备来传送保持密码。 通过使用上述技术,传输设备不需要跟踪哪些接收设备正在监听数据传输。 相反,发送设备可以在其不再接收保持活动的情况下简单地停止发送。