Method, apparatus, and system for improving reliability of data transmission involving an Ethernet device
A data transmission method, apparatus, and system are applied to the field of communication technologies. The method includes: performing demultiplexing processing on obtained y first data streams to obtain x second data streams, where the y first data streams are obtained through bit multiplexing processing; mapping the x second data streams at a granularity of n bits to obtain z third data streams; and outputting the z third data streams over an output lane, where y, x, n, and z are all positive integers, and n≥2. The method may be applied to an Ethernet high-speed interface.
1. A data transmission method, comprising:
performing, by a physical medium attachment (PMA) layer of a physical layer (PHY) chip of a transmitting device, inner forward error correction (FEC) encoding on x second data streams to obtain x encoded second data streams, where x is a positive integer;
performing, by the PMA layer, first block-level multiplexing processing on the x encoded second data streams to obtain z third data stream(s), where z is a positive integer, x>z, and z≥1; and
outputting, by the PMA layer, the z third data stream(s) over z output lane(s).
2. The method according to claim 1 , wherein an FEC scheme of the inner FEC encoding is one of the following FEC schemes: a Reed-Solomon (RS) code, a Bose-Chaudhuri-Hocquenghem (BCH) code, a Hamming code, a low-density parity-check (LDPC) code, a polar code, or a convolutional code.
3. The method according to claim 1 , further comprising:
performing, by the PMA layer, bit-level demultiplexing processing on y first data streams to obtain y demultiplexed first data streams, wherein the y first data streams are based on bit-level multiplexing processing, where y is a positive integer, and x>y.
4. The method according to claim 3 , further comprising:
performing, by the PMA layer, second block-level multiplexing processing on the y demultiplexed first data streams to obtain the x second data streams.
5. The method according to claim 4 , wherein in each pair of adjacent second data streams of the x second data streams, symbols located at a same position in the second data streams of the respective pair comprise a symbol from first FEC encoded data and a symbol from second FEC encoded data, wherein first FEC encoding producing the first FEC encoded data is different from the inner FEC encoding, and second FEC encoding producing the second FEC encoded data is different from the inner FEC encoding.
6. The method according to claim 5 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
7. The method according to claim 1 , further comprising:
receiving, by the PMA layer, the x second data streams, wherein the x second data streams are obtained by performing second block-level multiplexing processing on first FEC encoded data and second FEC encoded data, wherein first FEC encoding producing the first FEC encoded data is different from the inner FEC encoding, and second FEC encoding producing the second FEC encoded data is different from the inner FEC encoding.
8. The method according to claim 7 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
9. The method according to claim 1 , wherein performing the first block-level multiplexing processing on the x encoded second data streams to obtain the z third data stream(s) comprises:
performing the first block-level multiplexing processing on the x encoded second data streams in a round-robin fashion to obtain the z third data stream(s).
10. The method according to claim 9 , wherein z=1, and performing the first block-level multiplexing processing on the x encoded second data streams in the round-robin fashion comprises:
sequentially multiplexing data of n consecutive bits obtained from each of the x encoded second data streams according to a round robin sequence for the x encoded second data streams to obtain the third data stream, wherein n≥2.
11. The method according to claim 9 , wherein z≥2, and performing the first block-level multiplexing processing on the x encoded second data streams in the round-robin fashion comprises:
sequentially multiplexing data of n consecutive bits obtained from each of the x encoded second data streams to respective third data streams according to a round robin sequence for the x encoded second data streams and the z third data streams until all data of the x encoded second data streams is mapped to obtain the z third data streams, wherein n≥2.
12. The method according to claim 1 , wherein the transmitting device is an ethernet device.
13. A data transmission method, comprising:
obtaining, by a physical medium attachment (PMA) layer of a physical layer (PHY) chip of a receiving device, z third data stream(s) over z input lane(s), wherein the z third data stream(s) are based on first block-level multiplexing processing, where z is a positive integer, and z≥1;
performing, by the PMA layer, first block-level demultiplexing processing on the z third data stream(s) to obtain x encoded second data streams, where x is a positive integer, and x>z; and
performing, by the PMA layer, inner forward error correction (FEC) decoding on the x encoded second data streams to obtain x second data streams.
14. The method according to claim 13 , wherein an FEC scheme of the inner FEC decoding is one of the following FEC schemes: a Reed-Solomon (RS) decode, a Bose-Chaudhuri-Hocquenghem (BCH) decode, a Hamming decode, a low-density parity-check (LDPC) decode, a polar decode, or a convolutional decode.
15. The method according to claim 13 , further comprising:
performing, by the PMA layer, second block-level demultiplexing processing on the x second data streams to obtain y demultiplexed first data streams, where y is a positive integer, and x>y.
16. The method according to claim 15 , further comprising:
performing, by the PMA layer, bit-level demultiplexing processing on the y demultiplexed first data streams to obtain y first data streams, wherein the y first data streams are based on bit-level multiplexing processing.
17. The method according to claim 16 , wherein in each pair of adjacent second data streams of the x second data streams, symbols located at a same position in the second data streams of the respective pair comprise a symbol from first FEC encoded data and a symbol from second FEC encoded data.
18. The method according to claim 17 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
19. The method according to claim 13 , further comprising:
outputting, by the PMA layer, the x second data streams, wherein the x second data streams are obtained by performing second block-level multiplexing processing on first FEC encoded data and second FEC encoded data.
20. The method according to claim 19 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
21. The method according to claim 13 , wherein performing first block-level demultiplexing processing on the z third data stream(s) to obtain x encoded second data streams comprises:
performing the first block-level demultiplexing processing on the z third data stream(s) in a round-robin fashion to obtain the x encoded second data streams.
22. The method according to claim 21 , wherein z=1, and performing the first block-level demultiplexing processing on the z third data stream(s) in the round-robin fashion to obtain the x encoded second data streams comprises:
sequentially demultiplexing data of n consecutive bits in the third data stream to obtain the x encoded second data streams, wherein n≥2.
23. The method according to claim 21 , wherein z≥2, and performing the first block-level demultiplexing processing on the z third data stream(s) in the round-robin fashion to obtain the x encoded second data streams comprises:
sequentially demultiplexing data of n consecutive bits obtained from each of the z third data streams to respective encoded second data streams according to a round robin sequence for the z third data streams and until all data of the z third data streams is mapped to obtain the x encoded second data streams, wherein n≥2.
24. The method according to claim 13 , wherein the receiving device is an ethernet device.
25. A transmitting device, comprising:
a physical medium attachment (PMA) layer of a physical layer (PHY) chip, configured to:
perform inner forward error correction (FEC) encoding on x second data streams to obtain x encoded second data streams, where x is a positive integer;
perform first block-level multiplexing processing on the x encoded second data streams to obtain z third data stream(s), where z is a positive integer, x>z, and z≥1; and
an interface, configured to output the z third data stream(s) over z output lane(s).
26. The transmitting device according to claim 25 , wherein an FEC scheme of the inner FEC encoding is one of the following FEC schemes: a Reed-Solomon (RS) code, a Bose-Chaudhuri-Hocquenghem (BCH) code, a Hamming code, a low-density parity-check (LDPC) code, a polar code, or a convolutional code.
27. The transmitting device according to claim 25 , wherein the PMA layer is further configured to:
perform bit-level demultiplexing processing on y first data streams to obtain y demultiplexed first data streams, wherein the y first data streams are based on bit-level multiplexing processing, where y is a positive integer, and x>y.
28. The transmitting device according to claim 27 , wherein the PMA layer is further configured to:
perform second block-level multiplexing processing on the y demultiplexed first data streams to obtain the x second data streams.
29. The transmitting device according to claim 28 , wherein in each pair of adjacent second data streams of the x second data streams, symbols located at a same position in the second data streams of the respective pair comprise a symbol from first FEC encoded data and a symbol from second FEC encoded data, wherein first FEC encoding producing the first FEC encoded data is different from the inner FEC encoding, and second FEC encoding producing the second FEC encoded data is different from the inner FEC encoding.
30. The transmitting device according to claim 29 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
31. The transmitting device according to claim 25 , wherein the PMA layer is further configured to:
receive the x second data streams, wherein the x second data streams are obtained by performing second block-level multiplexing processing on first FEC encoded data and second FEC encoded data, wherein first FEC encoding producing the first FEC encoded data is different from the inner FEC encoding, and second FEC encoding producing the second FEC encoded data is different from the inner FEC encoding.
32. The transmitting device according to claim 31 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
33. The transmitting device according to claim 25 , wherein the PMA layer is configured to:
perform the first block-level multiplexing processing on the x encoded second data streams in a round-robin fashion to obtain the z third data stream(s).
34. The transmitting device according to claim 33 , wherein z=1, and the PMA layer is configured to:
sequentially multiplex data of n consecutive bits obtained from each of the x encoded second data streams according to a round robin sequence for the x encoded second data streams, to obtain the third data stream, wherein n≥2.
35. The transmitting device according to claim 33 , wherein z≥2, and the PMA layer is configured to:
sequentially multiplex data of n consecutive bits obtained from each of the x encoded second data streams to respective third data streams according to a round robin sequence for the x encoded second data streams and the z third data streams until all data of the x encoded second data streams is mapped to obtain the z third data streams, wherein n≥2.
36. The transmitting device according to claim 25 , wherein the transmitting device is an ethernet device.
37. A receiving device, comprising:
a first interface, configured to obtain z third data stream(s) over z input lane(s), wherein the z third data stream(s) are based on first block-level multiplexing processing, where z is a positive integer, and z≥1; and
a physical medium attachment (PMA) layer of a physical layer (PHY) chip, configured to:
perform first block-level demultiplexing processing on the z third data stream(s) to obtain x encoded second data streams, where x is a positive integer, and x>z; and
perform inner forward error correction (FEC) decoding on the x encoded second data streams to obtain x second data streams.
38. The receiving device according to claim 37 , wherein an FEC scheme of the inner FEC decoding is one of the following FEC schemes: a Reed-Solomon (RS) decode, a Bose-Chaudhuri-Hocquenghem (BCH) decode, a Hamming decode, a low-density parity-check (LDPC) decode, a polar decode, or a convolutional decode.
39. The receiving device according to claim 37 , wherein the PMA layer is further configured to:
perform second block-level demultiplexing processing on the x second data streams to obtain y demultiplexed first data streams, where y is a positive integer, and x>y.
40. The receiving device according to claim 39 , wherein the PMA layer is further configured to:
perform bit-level demultiplexing processing on the y demultiplexed first data streams to obtain y first data streams, wherein the y first data streams are based on bit-level multiplexing processing.
41. The receiving device according to claim 40 , wherein in each pair of adjacent second data streams of the x second data streams, symbols located at a same position in the second data streams of the respective pair comprise a symbol from first FEC encoded data and a symbol from second FEC encoded data.
42. The receiving device according to claim 41 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
43. The receiving device according to claim 37 , wherein the receiving device further comprises:
a second interface, configured to output the x second data streams, wherein the x second data streams are obtained by performing second block-level multiplexing processing on first FEC encoded data and second FEC encoded data.
44. The receiving device according to claim 43 , wherein each pair of adjacent symbols in each second data stream of the x second data streams includes a symbol from the first FEC encoded data and a symbol from the second FEC encoded data.
45. The receiving device according to claim 37 , wherein the PMA layer is configured to:
perform the first block-level demultiplexing processing on the z third data stream(s) in a round-robin fashion to obtain the x encoded second data streams.
46. The receiving device according to claim 45 , wherein z=1, and the PMA is configured to:
sequentially demultiplex data of n consecutive bits in the third data stream to obtain the x encoded second data streams, wherein n≥2.
47. The receiving device according to claim 45 , wherein z≥2, and the PMA layer is configured to:
sequentially demultiplex data of n consecutive bits obtained from each of the z third data streams to respective encoded second data streams according to a round robin sequence for the z third data streams and until all data of the z third data streams is mapped to obtain the x encoded second data streams, wherein n≥2.
48. The receiving device according to claim 37 , wherein the receiving device is an ethernet device.