Method and apparatus for transmitting data in optical transport network

Abstract

A method of transmitting data in an optical transport network is provided. The method comprises generating an optical transmission unit frame including an in-band area including a first area to which information data is allocated and a second area to which the information data is not allocated and an out-band area including parity information and transmitting the data through the optical transmission unit frame.

1 . A method for receiving client signal in an optical transport network, comprising:
 receiving an optical transmission unit (OTU) frame including an in-band area and an out-band area,   wherein the in-band area includes a first area to which the client signal is allocated and a second area to which fixed stuff is allocated; and   demapping the client signal from the first area.   
     
     
         2 . The method of  claim 1 , wherein the second area locates in 8-byte area at the end of the in-band area. 
     
     
         3 . The method of  claim 1 , wherein the second area locates between the first area and the out-band area. 
     
     
         4 . The method of  claim 1 , wherein the first area includes payload and overhead of the client signal, wherein the overhead includes client signal failure (CSF) bit and a plurality of bytes for payload type (PT) of the payload. 
     
     
         5 . The method of  claim 1 , wherein the client signal has a bitrate close to 104.134G. 
     
     
         6 . The method of  claim 1 , wherein the out-band area includes information for forward error correction (FEC). 
     
     
         7 . The method of  claim 6 , further comprising:
 performing an error correction of the information data by using the information included in the out-band area.   
     
     
         8 . The method of  claim 1 , further comprising:
 subtracting justification information from the first area.   
     
     
         9 . A method for receiving tributary signal in an optical transport network, comprising:
 receiving an optical transmission unit (OTU) frame including an in-band area and an out-band area,   wherein the in-band area includes a first area to which the tributary signal is allocated and a second area to which fixed stuff is allocated; and   demapping the tributary signal from a plurality of tributary slots included in the first area.   
     
     
         10 . The method of  claim 9 , wherein the second area locates in 8-byte area at the end of the in-band area. 
     
     
         11 . The method of  claim 9 , wherein the second area locates between the first area and the out-band area. 
     
     
         12 . The method of  claim 9 , wherein the first area includes 80 tributary slots. 
     
     
         13 . The method of  claim 9 , wherein the first area includes a plurality of 1.25G tributary slots. 
     
     
         14 . The method of  claim 9 , wherein the out-band area includes information for forward error correction (FEC) of the tributary signal. 
     
     
         15 . The method of  claim 14 , further comprising:
 correcting error of the tributary signal by using the information included in the out-band area.   
     
     
         16 . An apparatus of receiving data signal in an optical transport network, comprising:
 a receiver configured to receive an optical transmission unit (OUT) frame including an in-band area and an out-band area, wherein the in-band area includes a first area to which the data signal is allocated and a second area to which fixed stuff is allocated; and   demapper configured to demap the client signal from the first area.   
     
     
         17 . The apparatus of  claim 16 , wherein out-band area includes information for forward error correction (FEC) of the data signal. 
     
     
         18 . The apparatus of  claim 17 , further comprising:
 error corrector configured to correct error of the data signal by using the information included in the out-band area.   
     
     
         19 . The apparatus of  claim 14 , wherein the data signal is client signal. 
     
     
         20 . The apparatus of  claim 14 , wherein the data signal is tributary signal.