Transmission and reception methods for optical communication, and corresponding devices

Abstract

To provide a transmitting method for optical communication that is applied to various scenarios such as metropolitan area networks, backbone networks, and data center interconnections, exceeding 400 Gbps (including 600 Gbps, 800 Gbps, and the like).SOLUTION: A method includes the steps of generating a super-frame including a plurality of sub-frames, and transmitting the super-frame. Each sub-frame includes training symbols and pilot symbols. Each of the training symbols and the pilot symbols is one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number. In addition, in the training symbols and pilot symbols included in each sub-frame, the numbers of -A-Aj, -A+Aj, A-Aj, and A+Aj in two mutually perpendicular polarization directions meet a certain requirement, which can achieve DC balance, and is conducive to signal recovery at a receiving end.SELECTED DRAWING: Figure 4

Claims

1. A transmission method for optical communication, A step of generating a superframe comprising multiple subframes, wherein each subframe includes a training symbol and a pilot symbol, and in one polarization direction, there exists one symbol that is both a training symbol and a pilot symbol, and in each subframe, in one polarization direction, N ＰＳ Individual pilot symbols and N ＴＳ There are N training symbols. ＰＳ It is 114, N ＴＳ The number of pilot symbols is 11, and in order to achieve DC balance, the N PS pilot symbols are combined with the N TS training symbols, each of the training symbols and pilot symbols being one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and the 114 pilot symbols for each of the two polarization directions are shown in the table below, in steps and Table 1 The step of transmitting the superframe and A transmission method that includes [this].

2. In one polarization direction, the total number of symbols N in the superframe Ｆ The number of subframes is 175104. ＳＦ The number of symbols in each subframe is 24, and N Ｓ The transmission method according to claim 1, wherein the number of symbols before framing of the superframe is 7296, and the number of symbols before framing of the superframe is 172032.

3. The number N of frame alignment word symbols ＦＡＷ and the number N of reserved symbols ＲＥＳ The sum N of them ＦＡＷ + N ＲＥＳ is 96. The transmission method according to claim 2

4. The transmission method according to claim 1, wherein in each subframe, the symbol at a fixed position for each of the 64 symbols is the pilot symbol.

5. The transmission method according to claim 1, wherein the first symbol in each subframe is both a training symbol and a pilot symbol.

6. The transmission method according to claim 1, wherein the modulation format of the symbol in the superframe is 16QAM, and the value of A is ±1 or ±3.

7. The transmission method according to claim 1, wherein the modulation format of the symbol in the superframe is QPSK, and the value of A is ±1.

8. A receiving method for optical communication, A step of receiving a superframe comprising multiple subframes, wherein each subframe includes a training symbol and a pilot symbol, and in one polarization direction, there is one symbol that is both the training symbol and the pilot symbol, and in each subframe, in one polarization direction, N ＰＳ Individual pilot symbols and N ＴＳ There are N training symbols. ＰＳ It is 114, N ＴＳ The number is 11, and in order to achieve DC balance, the N PS pilot symbols are combined with the N TS training symbols, each of the training symbols and pilot symbols being one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and the 114 pilot symbols in each of the two polarization directions are as shown in the table below, with steps and Table 2 The steps of decoding the received superframe and Reception methods including

9. In one polarization direction, the total number of symbols N in the superframe Ｆ The number of subframes is 175104. ＳＦ The number of symbols in each subframe is 24, and N Ｓ The receiving method according to claim 8, wherein the number of symbols before framing of the superframe is 7296, and the number of symbols before framing of the superframe is 172032.

10. Number of frame alignment word symbols N ＦＡＷ and the number of reserved symbols N ＲＥＳ Tono Wa N ＦＡＷ +N ＲＥＳ The receiving method according to claim 9, wherein is 96.

11. The receiving method according to claim 8, wherein in each subframe, the symbol at a fixed position for each of the 64 symbols is the pilot symbol.

12. The receiving method according to claim 8, wherein the first symbol in each subframe is both a training symbol and a pilot symbol.

13. The receiving method according to claim 8, wherein the modulation format of the symbol in the superframe is 16QAM, and the value of A is ±1 or ±3.

14. The receiving method according to claim 8, wherein the modulation format of the symbol in the superframe is QPSK, and the value of A is ±1.

15. A transmission method for optical communication, A step of generating a superframe comprising multiple subframes, wherein each subframe includes a training symbol and a pilot symbol, and in one polarization direction, there exists one symbol that is both a training symbol and a pilot symbol, and in each subframe, in one polarization direction, N ＰＳ Individual pilot symbols and N ＴＳ There are N training symbols. ＰＳ It is 114, N ＴＳ The step is 11, and each of the training symbol and the pilot symbol is one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and in one polarization direction, in a combination of 114 pilot symbols and 11 training symbols, the number of -A-Aj, -A+Aj, A-Aj, and A+Aj in that one polarization direction is all 31, The step of transmitting the superframe and A transmission method that includes [this].

16. In one polarization direction, the total number of symbols N in the superframe Ｆ The number of subframes is 175104. ＳＦ The number of symbols in each subframe is 24, and N Ｓ The transmission method according to claim 15, wherein the number of symbols before framing of the superframe is 7296, and the number of symbols before framing of the superframe is 172032.

17. Number of frame alignment word symbols N ＦＡＷ and the number of reserved symbols N ＲＥＳ Tono Wa N ＦＡＷ +N ＲＥＳ The transmission method according to claim 16, wherein is 96.

18. Each of the training symbols and pilot symbols is one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and in one polarization direction, in a combination of 114 pilot symbols and 11 training symbols, the 114 pilot symbols in each of the two polarization directions are as shown in the table below. Table 3 The transmission method according to claim 15.

19. The transmission method according to claim 15, wherein in each subframe, the symbol at a fixed position for each of the 64 symbols is the pilot symbol.

20. The transmission method according to claim 15, wherein the first symbol in each subframe is both a training symbol and a pilot symbol.

21. The transmission method according to claim 15, wherein the modulation format of the symbol in the superframe is 16QAM, and the value of A is ±1 or ±3.

22. The transmission method according to claim 15, wherein the modulation format of the symbol in the superframe is QPSK, and the value of A is ±1.

23. A receiving method for optical communication, A step of receiving a superframe comprising multiple subframes, wherein each subframe includes a training symbol and a pilot symbol, and in one polarization direction, there is one symbol that is both the training symbol and the pilot symbol, and in each subframe, in one polarization direction, N ＰＳ Individual pilot symbols and N ＴＳ There are N training symbols. ＰＳ It is 114, N ＴＳ The step is 11, and each of the training symbol and the pilot symbol is one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and in one polarization direction, in a combination of 114 pilot symbols and 11 training symbols, the number of -A-Aj, -A+Aj, A-Aj, and A+Aj in that one polarization direction is all 31, The steps of decoding the received superframe and Reception methods including

24. In one polarization direction, the total number of symbols N in the superframe Ｆ The number of subframes is 175104. ＳＦ The number of symbols in each subframe is 24, and N Ｓ The receiving method according to claim 23, wherein the number of symbols before framing of the superframe is 7296, and the number of symbols before framing of the superframe is 172032.

25. Number of frame alignment word symbols N ＦＡＷ and the number of reserved symbols N ＲＥＳ Tono Wa N ＦＡＷ +N ＲＥＳ The receiving method according to claim 24, wherein is 96.

26. Each of the training symbols and pilot symbols is one of -A-Aj, -A+Aj, A-Aj, and A+Aj, where A is a real number, and in one polarization direction, in a combination of 114 pilot symbols and 11 training symbols, the 114 pilot symbols in each of the two polarization directions are as shown in the table below. Table 4 The receiving method according to claim 23.

27. The receiving method according to claim 23, wherein in each subframe, the symbol at a fixed position for each of the 64 symbols is the pilot symbol.

28. The receiving method according to claim 23, wherein the first symbol in each subframe is both a training symbol and a pilot symbol.

29. The receiving method according to claim 23, wherein the modulation format of the symbol in the superframe is 16QAM, and the value of A is ±1 or ±3.

30. The receiving method according to claim 23, wherein the modulation format of the symbol in the superframe is QPSK, and the value of A is ±1.

31. A communication device for optical communication, wherein the communication device is configured to carry out the method described in any one of claims 1 to 30.

32. A system for optical communication, the system comprising a transmitting device and a receiving device, wherein the transmitting device is configured to carry out the method according to any one of claims 1 to 7 and 15 to 22, and the receiving device is configured to carry out the method according to any one of claims 8 to 14 and 23 to 30.

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