Optical communications – Multiplex – Optical local area network
Reexamination Certificate
2005-12-06
2010-10-26
Pham, Chi H (Department: 2471)
Optical communications
Multiplex
Optical local area network
C398S069000, C370S395510
Reexamination Certificate
active
07822343
ABSTRACT:
The present research relates to s a transmission frame structure supporting a data service and a circuit service of diverse bands in a Synchronous Optical Network (SONET)/Synchronous Digital Hierarchy (SDH) network. This research provides a transmission frame structure including a sync period, an async period, and a control period and provides a multiplexing apparatus that can add or extract a fixed length frame in the synch period of the transmission frame and add or extract a variable length frame in the asynch period, and a method for transmitting the transmission frame. The transmission frame structure includes a sync period for transmitting a fixed length frame; an async period for transmitting a variable length frame; and a control period for transmitting a control frame storing information for discriminating between the sync period and the async period. The technology of this research can be applied to a synchronous optical network system.
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Notification Concerning Transmittal of International Preliminary Report for International Application No. PCT/KR2005/004141, Jun. 13, 2007.
Chung Young-sik
Joo Seong-soon
Park Tae-joon
Song Jong-tae
Electronics and Telecommunications Research Institute
Huang Weibin
Lahive & Cockfield LLP
Lee, Esq. EuiHoon
Pham Chi H
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