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    • 13. 发明授权
    • PON system method for receiving optical signal and OLT
    • PON系统接收光信号和OLT的方法
    • US08116627B2
    • 2012-02-14
    • US12222224
    • 2008-08-05
    • Hiroki IkedaToshiki SugawaraYusuke Yajima
    • Hiroki IkedaToshiki SugawaraYusuke Yajima
    • H04B10/20
    • H04B10/272H04B10/27
    • When a signal of weak optical power is received immediately after a signal of intense optical power, input of the signal of intense optical power readily causes saturation, and the influence interferes in the signal of weak optical power to deteriorate receiver sensitivity. Moreover, when a reverse-bias voltage of APD is changed, if a difference between the voltages is large, a next optical signal is received until the receiver sensitivity of the APD becomes stable, so that receiver sensitivity deteriorates. A DBA order is determined so that a difference in reverse-bias voltage is small, and reverse-bias voltage is controlled in line with reception timing from ONU.
    • 当在强光信号之后立即接收到弱光功率的信号时,强光信号信号的输入容易引起饱和,并且影响会干扰弱光功率的信号,从而降低接收机灵敏度。 此外,当APD的反向偏置电压发生变化时,如果电压差大,则接收下一个光信号,直到APD的接收灵敏度变得稳定为止,接收灵敏度变差。 确定DBA顺序,使得反向偏置电压的差小,并且根据ONU的接收定时来控制反向偏置电压。
    • 16. 发明申请
    • Channel switching system and method of IPTV service in passive optical network
    • 无源光网络中IPTV业务的信道交换系统及方法
    • US20100086302A1
    • 2010-04-08
    • US12591911
    • 2009-12-04
    • Hiroki IkedaNie Yaling
    • Hiroki IkedaNie Yaling
    • H04B10/00
    • H04J3/1694H04N7/22
    • Channel switching system and method of an IPTV service in a passive optical network (PON) are disclosed. To reduce a channel switching time of an IPTV system in the passive optical network, the system and the method use a channel switching control module and a channel list module in the passive optical network. In a case where a passive optical network system receives an IPTV channel switching request transmitted from a terminal user, the channel switching control module checks a recording of a channel list module and a recording of an authentication list module, and then updates a filter recording of an optical network unit to thereby directly transmit an image flow of a new channel in the passive optical network. When such system and method are applied to the passive optical network, high-speed switching of the IPTV service channel by the terminal user can be realized.
    • 公开了无源光网络(PON)中的IPTV业务的信道切换系统和方法。 为了减少无源光网络中IPTV系统的信道切换时间,系统和方法使用无源光网络中的信道切换控制模块和信道列表模块。 在无源光网络系统接收到从终端用户发送的IPTV信道切换请求的情况下,信道切换控制模块检查信道列表模块的记录和认证列表模块的记录,然后更新过滤器记录 光网络单元,从而在无源光网络中直接发送新信道的图像流。 当将这种系统和方法应用于无源光网络时,可以实现终端用户对IPTV业务信道的高速交换。