Virtual lane identification method and apparatus for applying virtual lane scheme to optical transport network
AssigneeElectronics and Telecommunications Research Institute
InventorsHyun Woo Cho, Yong Wook Ra, Byung Jun Ahn
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Abstract
There is provided a virtual lane identification method and apparatus for applying a virtual lane scheme to an optical transport network. More particularly, there is provided a technique for identifying virtual lanes using multi-frame alignment signals (MFASs) at a receiver without modifying an existing frame structure of an optical transport network signal by periodically changing a rotating direction of the virtual lanes when applying an Ethernet virtual lane scheme to a ultra-high speed OTN signal, particularly to OTU4 (100G).
Claims11
A virtual lane identification apparatus at a transmitting side, the apparatus comprising:
- a framer forming and processing a frame structure of transport data signal;
- a frame disassembler dividing the frame into blocks of a predetermined size so that a frame alignment signal (FAS) and a multi-frame alignment signal (MFAS) of the frame received from the framer are contained in one same block;
- and
- a lane identification rotating device periodically changing a rotating direction of a plurality of virtual lanes and distributing the blocks divided by the frame disassembler to the plurality of virtual lanes by a round-robin scheme.
A virtual lane identification apparatus at a receiving side, the apparatus comprising:
- a lane identification device aligning a plurality of received virtual lanes respectively using frame alignment signals (FASs) and identifying the plurality of virtual lanes using sets of multi-frame alignment signals (MFASs);
- a virtual lane assembler reassembling an original frame of an optical transport network signal from all the virtual lanes having been aligned and identified by the lane identification device;
- and
- a framer receiving the frame reassembled by the virtual lane assembler and performing signal processing.
A method of identifying a virtual lane, the method comprising:
- receiving a signal in predetermined units and checking a detection period of frame alignment signals (FASs) contained in the input signal;
- checking whether the detection period and MFAS values contained in the input signal are normal;
- identifying and aligning virtual lanes when the detection period and the MFAS values are normal;
- and
- reassembling the virtual lanes, having been identified and aligned, to output an original frame of an optical transport network signal.
Dependencies are inferred from the claim text.