Data transmission method, apparatus, and system

Abstract

The present disclosure provides a data transmission method including: receiving a first-mode optical signal from a first port corresponding to a first port number; converting, according to a correspondence between the first port number and a first mode group number, the received first-mode optical signal into a second-mode optical signal carried in a first mode group identified by the first mode group number, where the second-mode optical signal carried in the first mode group identified by the first mode group number includes an optical signal in one or more modes; and outputting the second-mode optical signal obtained by means of conversion.

1 - 16 . (canceled) 
     
     
         17 . A data transmission method, comprising:
 receiving a first optical signal from an input port;   converting, according to a correspondence between an input port of an optical signal and a mode group, the received first optical signal into a second optical signal in one or more modes in a mode group corresponding to the input port; and   multiplexing the second optical signal to a multimode optical fiber for transmission.   
     
     
         18 . The data transmission method according to  claim 17 , wherein the first optical signal is an optical signal in one or more modes. 
     
     
         19 . The data transmission method according to  claim 17 , wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. 
     
     
         20 . A data transmission method, comprising:
 receiving a second optical signal;   determining a mode group to which the second optical signal belongs; and   outputting, according to a correspondence between an output port and a mode group, the received second optical signal from a corresponding output port.   
     
     
         21 . The data transmission method according to  claim 20 , further comprising:
 converting the second optical signal into a preset-mode optical signal for output.   
     
     
         22 . The data transmission method according to  claim 20 , wherein the second optical signal is an optical signal in one or more modes. 
     
     
         23 . The data transmission method according to  claim 20 , wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. 
     
     
         24 . A mode multiplexer, comprising:
 a first port processing unit, configured to:
 receive a first optical signal from an input port; 
   a first processor, configured to:
 convert, according to a correspondence between an input port of an optical signal and a mode group, the received first optical signal into a second optical signal in one or more modes in a mode group corresponding to the input port, and 
 instruct the first port processing unit to multiplex the second optical signal to a multimode optical fiber for transmission; and 
   wherein the first port processing unit is further configured to:
 multiplex, according to an instruction from the first processor, the second optical signal to a multimode optical fiber for transmission. 
   
     
     
         25 . The mode multiplexer according to  claim 24 , wherein the first optical signal is an optical signal in one or more modes. 
     
     
         26 . The mode multiplexer according to  claim 24 , wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants. 
     
     
         27 . A mode demultiplexer, comprising:
 a second port processing unit, configured to:
 receive a second optical signal; 
   a second processor, configured to:
 determine a mode group to which the received second optical signal belongs, 
 obtain, according to a correspondence between an output port and a mode group, the output port corresponding to the received second optical signal, and 
 instruct the second port processing unit to output the received second optical signal from the corresponding output port; and 
   wherein the second port processing unit is further configured to:
 output, according to an instruction from the second processor, the received second optical signal from a corresponding output port. 
   
     
     
         28 . The mode demultiplexer according to  claim 27 , wherein:
 the second processor is further configured to:
 convert the second optical signal into a preset-mode optical signal, and 
 instruct the second port processing unit to output the signal obtained by means of conversion from a corresponding output port; and 
   the second port processing unit is further configured to:
 output the optical signal obtained by means of conversion from the corresponding port according to an instruction from the second processor. 
   
     
     
         29 . The mode demultiplexer according to  claim 27 , wherein the second optical signal is an optical signal in one or more modes. 
     
     
         30 . The mode demultiplexer according to  claim 27 , wherein the mode group comprises optical signals in one or more modes having a same propagation constant or approximate propagation constants.