Multiplex communications – Communication over free space – Repeater
Reexamination Certificate
2011-08-02
2011-08-02
Yao, Kwang B (Department: 2473)
Multiplex communications
Communication over free space
Repeater
C370S350000
Reexamination Certificate
active
07990909
ABSTRACT:
A method and apparatus are provided to achieve frequency synchronization between a first clock at a first node and a second clock at a second node of a packet-carrying communications network. At the first node: a property of packet transmission through the network between the first node and the second node is measured; and the measurement of the property is sent to the second node. At the second node, the same property of packet transmission through the network between the first node and the second node is measured. The measurement of the property made at the first node and the measurement of the property made at the second node are used to synchronize the frequency of the second clock with respect to the first clock.
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Christopher & Weisberg P.A.
Ciena Corporation
Loo Juvena
Yao Kwang B
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