L bit=1   ----------+           +-----------+           +----------
                    |           |           |           |
L bit=0             +-----------+           +-----------+
           Batch n        ...      Batch 3     Batch 2     Batch 1
         <---------> <---------> <---------> <---------> <--------->

                             Traffic Flow
         ===========================================================>
L bit   ...1111111111 0000000000 11111111111 00000000000 111111111...
         ===========================================================>