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US 8,588,256 B2Granted
Transmission apparatus and signal mapping method
AssigneeFujitsu Limited
InventorsToru Katagiri, Hiroyuki Kitajima
Life of this patent
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Abstract
A transmission apparatus exercises insertion control for inserting a client signal and a stuff byte into a payload area in a frame into which the client signal is to be mapped, and sends the frame after the insertion control. In addition, the transmission apparatus inserts the client signal or the stuff byte in columns of the frame into the payload area except a leading column.
Claims10
A transmission apparatus comprising:
- an insertion control unit which exercises insertion control for inserting a signal and a stuff byte into a payload area in a frame into which the signal is to be mapped;
- and
- a frame sending unit which sends the frame after the insertion control,
- wherein the insertion control unit inserts the signal or the stuff byte in columns of the frame into the payload area except a leading column;
- wherein:
- if
- i×int(Cdata/m)mod int(Spayload/m)<int(Cdata/m) (1)
- is satisfied, then the insertion control unit inserts the signal into an ith column of the payload area;
- and
- if
- i×int(Cdata/m)mod int(Spayload/m)int(Cdata/m) (2)
- is satisfied, then the insertion control unit inserts the stuff byte into an ith column of the payload area
- where, in inequalities (1) and (2), i is a column number assigned to a column of the payload area, m is a number of rows of the frame, Cdata is a number of bytes of the signal to be mapped, Spayload is a total number of bytes of the payload area, int(x) is a function for finding an integral value for x, and (A mod B) represents a remainder obtained by dividing A by B.
10 more elements
A signal mapping method for mapping a signal into a frame, the method comprising:
- inserting the signal or a stuff byte in columns of the frame into a payload area in the frame except a leading column at the time of exercising insertion control for inserting the signal and the stuff byte into the payload area into which the signal is to be mapped;
- wherein:
- if
- i×int(Cdata/m)mod int(Spayload/m)<int(Cdata/m) (5)
- is satisfied, then the signal is inserted into an ith column of the payload area;
- and
- if
- i×int(Cdata/m)mod int(Spayload/m)int(Cdata/m) (6)
- is satisfied, then the stuff byte is inserted into an ith column of the payload area
- where, in inequalities (5) and (6), i is a column number assigned to a column of the payload area, m is a number of rows of the frame, Cdata is a number of bytes of the signal to be mapped, Spayload is a total number of bytes of the payload area, int(x) is a function for finding an integral value for x, and (A mod B) represents a remainder obtained by dividing A by B.
7 more elements
Dependencies are inferred from the claim text.