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A passive optical network coding processing method and device

A passive optical network and processing method technology, applied in the field of passive optical network coding processing methods and devices, can solve the problems of destroying the front end of the LPDC code block, the LDPC code word cannot be decoded, and no solution is proposed.

Active Publication Date: 2021-11-09
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the upstream service of EPON / GPON is bursty and discontinuous, and there will be a phenomenon of burst error (burst error) in the upstream channel, that is, in the process of data transmission, special errors appearing in series, in the optical network unit ( ONU), if the "switching effect" of the burst error transmitter introduces non-uniform and correlated bit errors at the front of the code block (burst-first), the burst mode receiver will also get the burst error, generally speaking , the time slot occupied by the burst error at the front end of the code block (burst-first) is 150ns, then for the 10G PON system, the bit length of the front end (burst-first) of the code block is 1500bits
[0007] However, the existing technology does not clarify the unified rules of LDPC codewords. If the rules of LDPC codewords designed by various manufacturers are different, the rules of codewords received by the LDPC decoder are inconsistent with those of the transmitter, which will lead to LDPC codeword cannot be decoded
[0008] In the same way, the burst length (burst_length) will destroy the front end of the LPDC code block. If the position of the burst error and the position of the puncture are staggered from each other, the burst error bit will be spread to the entire code word, resulting in Code block decoding error
[0009] For the above-mentioned technical problems in related technologies, no effective solution has been proposed yet

Method used

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  • A passive optical network coding processing method and device
  • A passive optical network coding processing method and device
  • A passive optical network coding processing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] An embodiment of the present invention provides a passive optical network, wherein the passive optical network may be a digital Ethernet passive optical network (Ethernet Passive Optical Network, EPON for short) / Gigabit-Capable PON , referred to as GPON), adopts Low Density Parity Check-Code (LDPC) code, the length of LDPC code word can be adjusted flexibly according to the service requirements of uplink and downlink channels within a certain range, but not limited to this.

[0057] figure 2 For a schematic flowchart of passive optical network coding processing provided by an embodiment of the present invention, see figure 2 , the present invention proposes a passive optical network coding processing method, the method comprising:

[0058] S101. Preset the transmission order of the codewords in each area in the encoding.

[0059] S102. Send the codewords of each area to the receiving end according to the delivery sequence.

[0060] Specifically, the parameters gener...

Embodiment 2

[0081] image 3 A schematic diagram of a passive optical network encoding process provided by Embodiment 1 of the present invention, see FIG. 3 , in this embodiment, the parameters generally represented in the encoding at the transmitting end include codewords, code rates, information bits, parity bits, Drilling check digits, zero filling or drilling information bits, etc., wherein the information bits, check digits, drilling check digits, zero filling or drilling information bits correspond to different areas in the coding respectively, in this embodiment , assuming that the code word length is L bits, and the code rate is x, then the information bit length L_s=L*x, the check bit length L_p=L-L_s;

[0082] Assuming that the check bit punching length is p bits, then the remaining check bit length L_p_0=L_p-p;

[0083] Assuming that the information bit is zero-filled or the length of the puncture is s bits, the actual transmitted information bit length L_s_0=L_s-s;

[0084] T...

Embodiment 3

[0090] Figure 4 A schematic diagram of a passive optical network coding process provided by Embodiment 1 of the present invention, see FIG. 4 , in this embodiment, the parameters generally represented in the coding at the transmitting end include codewords, code rates, information bits, parity bits, Drilling check digits, zero filling or drilling information bits, etc., wherein the information bits, check digits, drilling check digits, zero filling or drilling information bits are in different areas of the encoding, in this embodiment , assuming that the code word length is L bits, and the code rate is x, then the information bit length L_s=L*x, the check bit length L_p=L-L_s;

[0091] Assuming that the check bit punching length is p bits, then the remaining check bit length L_p_0=L_p-p;

[0092] Assuming that the information bit is zero-filled or the length of the puncture is s bits, the actual transmitted information bit length L_s_0=L_s-s;

[0093] Therefore, after punct...

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PUM

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Abstract

The present invention provides a passive optical network coding processing method, device and transmitting end. The method includes: the transmitting end presets the sequence of transmission of codewords in each area in the coding, and sends the codewords of each area to the receiver according to the sequence of transmission. end. Through the solution of the present invention, it is possible to overcome the problem that in the existing passive optical network technology, there is no unified rule for transmitting codewords at the transmitting end, which leads to the inability to decode. The sequential transfer order enables the receiving end of the passive optical network to better complete decoding according to the sequential transfer order.

Description

technical field [0001] The present invention relates to the field of optical communication, in particular to a passive optical network coding processing method and device. Background technique [0002] At present, PON (Passive Optical Network) passive optical network is the main technology to realize fiber-to-the-home, providing point-to-multipoint optical fiber access. Among them, Ethernet Passive Optical Network (EPON for short) and Gigabit Passive optical network (Gigabit-Capable PON, GPON for short) is the two main members of passive optical network access. [0003] In the related art, with the introduction of Low Density Parity Check-Code (LDPC) coding into the EPON / GPON system, the length of the LDPC code word can be flexibly adjusted within a certain range according to the service requirements of the uplink and downlink channels. [0004] For example: 25G PON LDPC codeword design as follows figure 1 As shown, the second area is a check bit of 2816 bits, the third ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H03M13/11
CPCH03M13/1165H04B10/516H04L1/0057H04L1/0061H04L1/0068H03M13/11H04L1/00
Inventor 刘铮袁立权张伟良
Owner ZTE CORP