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公开(公告)号：US20050100054A1
公开(公告)日：2005-05-12
申请号：US10646087
申请日：2003-08-22
CPC分类号： H04J3/0632 , H04J3/0682
摘要： A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network, from a source having a source TDM clock to a destination having a destination TDM clock. The method includes providing at least some packets with a Remote Timestamp representing the state of the source TDM clock when the packet is created; providing said at least some packets with a Local Timestamp representing the state of the destination TDM clock when the packet is received; determining a Transit Time value representing the difference between said Local and Remote Timestamps; and controlling the clock frequency of the TDM output on the basis of said Transit Time as determined above.
摘要翻译： 一种从已经通过分组网络发送的TDM数据的分组从具有源TDM时钟的源到具有目的地TDM时钟的目的地的TDM输出的时钟信号的恢复方法。 所述方法包括：当所述分组被创建时，提供表示所述源TDM时钟的状态的远程时间戳的至少一些分组; 当接收到所述分组时，向所述至少一些分组提供表示目的地TDM时钟的状态的本地时间戳; 确定表示所述本地和远程时间戳之间的差的传输时间值; 以及基于上述确定的所述运输时间来控制TDM输出的时钟频率。
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公开(公告)号：US20050100006A1
公开(公告)日：2005-05-12
申请号：US10652645
申请日：2003-08-28
申请人： Martin Scott , Nicholas Faithorn , Timothy Frost
发明人： Martin Scott , Nicholas Faithorn , Timothy Frost
CPC分类号： H04J3/0632
摘要： A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network. The method includes providing a packet buffer to store incoming packets after transmission over the packet network, maintaining a packet count which is incremented as packets arrive at the packet buffer, and decremented each time a packet leaves the packet buffer, and sampling the packet count and controlling the clock frequency of the TDM output on the basis of the sampled packet count.
摘要翻译： 一种从已经通过分组网络发送的TDM数据的分组恢复TDM输出的时钟信号的方法。 该方法包括提供一个分组缓冲器，用于在通过分组网络传输之后存储输入分组，保持分组计数，其随着分组到达分组缓冲器而增加，并且每当分组离开分组缓冲器时递减，并且对分组计数进行采样， 基于采样分组计数控制TDM输出的时钟频率。
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公开(公告)号：US07411970B2
公开(公告)日：2008-08-12
申请号：US10646087
申请日：2003-08-22
CPC分类号： H04J3/0632 , H04J3/0682
摘要： A method of recovering a clock signal for a TDM output from packets of TDM data which have been transmitted over a packet network, from a source having a source TDM clock to a destination having a destination TDM clock. The method includes providing at least some packets with a Remote Time stamp representing the state of the source TDM clock when the packet is created; providing said at least some packets with a Local Timestamp representing the state of the destination TDM clock when the packet is received; determining a Transit Time value representing the difference between said Local and Remote Timestamps; and controlling the clock frequency of the TDM output on the basis of said Transit Time as determined above.
摘要翻译： 一种从已经通过分组网络发送的TDM数据的分组从具有源TDM时钟的源到具有目的地TDM时钟的目的地的TDM输出的时钟信号的恢复方法。 该方法包括：在创建分组时，提供表示源TDM时钟的状态的远程时间戳的至少一些分组; 当接收到所述分组时，向所述至少一些分组提供表示目的地TDM时钟的状态的本地时间戳; 确定表示所述本地和远程时间戳之间的差的传输时间值; 以及基于上述确定的所述运输时间来控制TDM输出的时钟频率。
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