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    • 32. 发明申请
    • OPTICAL NETWORK TERMINAL, METHOD FOR TIME SYNCRONIZATION THEREOF, OPTICAL LINE TERMINAL, AND METHOD FOR MANAGING NETWORK THEREOF
    • 光网络终端,其时间同步方法,光线终端及其网络管理方法
    • US20110129218A1
    • 2011-06-02
    • US12902273
    • 2010-10-12
    • Sung Chang Kim
    • Sung Chang Kim
    • H04J14/00
    • H04J3/0682H04J3/1694
    • A method for synchronizing time by an optical network terminal (ONT) in a passive optical network system is provided. The method includes: receiving a ranging request message including a first current time of an optical line terminal (OLT); calculating a first compensation time when a transmission delay is compensated at a time that the ranging request message is received; transmitting a serial number response message to the OLT; calculating a second compensation time when the transmission delay is compensated at a time when the serial number response message is transmitted; receiving a ranging time message including a second current time when the serial number response message from the OLT is received; calculating an offset time from the first current time, the second current time, the first compensation time, and the second compensation time; and synchronizing a clock of the ONT and a clock of the OLT based on the offset time.
    • 提供了一种通过无源光网络系统中的光网络终端(ONT)来同步时间的方法。 该方法包括:接收包括光线路终端(OLT)的第一当前时间的测距请求消息; 当接收到所述测距请求消息时,计算发送延迟被补偿的第一补偿时间; 向OLT发送序列号响应消息; 当在发送序列号响应消息的时间补偿传输延迟时,计算第二补偿时间; 当接收到来自OLT的序列号响应消息时,接收包括第二当前时间的测距时间消息; 从第一当前时间,第二当前时间,第一补偿时间和第二补偿时间计算偏移时间; 以及基于所述偏移时间来同步所述ONT的时钟和所述OLT的时钟。
    • 34. 发明申请
    • METHOD OF SAVING POWER IN OPTICAL ACCESS NETWORK
    • 节省光功率网络的方法
    • US20100260497A1
    • 2010-10-14
    • US12678742
    • 2008-05-22
    • Bin-Yeong YoonSung-Chang KimGeun-Yong Kim
    • Bin-Yeong YoonSung-Chang KimGeun-Yong Kim
    • H04B10/08
    • H04B10/272H04Q11/0067H04Q2011/0079
    • Provided is a method of reducing power consumption of an optical access network (OAN) as much as possible by configuring an optical line terminal (OLT) and optical network terminals (ONTs) in the OAN to support a maximum power-saving mode. According to the method, upon the application of power, an ONT operates normally in an activation mode. The ONT then determines whether the requirements for switching from activation mode to power-saving mode are satisfied. If the requirements are satisfied, the ONT transmits a sleep signal to an OLT, which is a message notifying that the ONT will soon switch to power-saving mode. Thereafter, the ONT switches to power-saving mode and cuts off power for all functions except for power for monitoring and controlling external inputs. The ONT then determines whether the requirements for switching from power-saving mode to activation mode are satisfied. If the requirements are satisfied, the ONT transmits a wake-up signal to the OLT and switches to the activation mode for normal operation.
    • 提供了一种通过配置OAN中的光线路终端(OLT)和光网络终端(ONT)来支持最大功率节省模式来尽可能多地降低光接入网(OAN)的功耗的方法。 根据该方法,在应用电源时,ONT在激活模式下正常工作。 ONT然后确定是否满足从激活模式切换到省电模式的要求。 如果满足要求,则ONT向OLT发送睡眠信号,该消息通知ONT即将切换到省电模式。 此后,ONT切换到省电模式,并切断所有功能,除了用于监视和控制外部输入的电源。 ONT然后确定是否满足从省电模式切换到激活模式的要求。 如果满足要求,则ONT向OLT发送唤醒信号,并切换到正常操作的激活模式。