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Hardware coding method and circuit based on FEC (forward error correction) in 10G EPON ONU (Ethernet passive optical network optical network unit)

A coding method and coding circuit technology are applied in the field of FEC hardware coding methods and circuits to achieve the effects of strong operability, simple and effective implementation method, and small circuit cost.

Inactive Publication Date: 2011-06-01
FENGHUO COMM SCI & TECH CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0011] For the defects existing in the existing IEEE802.3av standard protocol, the purpose of the present invention is to provide a method and circuit based on FEC hardware encoding in 10G EPON ONU, so as to solve the problem of the data bit width of FEC encoding in the upstream direction of 10G EPON ONU. The problem of implementing correct FEC encoding when the data bit width required by FEC encoding does not match

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  • Hardware coding method and circuit based on FEC (forward error correction) in 10G EPON ONU (Ethernet passive optical network optical network unit)
  • Hardware coding method and circuit based on FEC (forward error correction) in 10G EPON ONU (Ethernet passive optical network optical network unit)
  • Hardware coding method and circuit based on FEC (forward error correction) in 10G EPON ONU (Ethernet passive optical network optical network unit)

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Embodiment Construction

[0051] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0052] The present invention provides a method and circuit based on FEC hardware encoding in 10G EPON ONU, which is used to realize FEC hardware encoding in the uplink direction in 10G EPON ONU. Hardware timing speed.

[0053] In order to better understand the present invention, the structure of the upstream direction of the 10G EPON ONU is first introduced below.

[0054] The structure of the 10G EPON ONU upstream direction specified in the IEEE802.3ay standard is as follows: figure 1 As shown, according to the transmission direction of the upstream data stream in the ONU (Optical Network Unit), the upstream processing process in the ONU is described as follows: the RS layer (coordination sublayer) transfers the data of the upper layer according to the XGMII interface (10Gigabit Media Independent Interface, 10Gb is independent of the media After the format...

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Abstract

The invention relates to a hardware coding method and circuit based on FEC (forward error correction) in a 10G EPON ONU (Ethernet passive optical network optical network unit). The hardware coding method comprises the following steps: S10. writing 66bit-wide data sent by a scrambler part into an fifo buffer; S20. writing the rest 65bit-wide data into nine register arrays in sequence after taking out the 66bit-wide data from the fifo buffer and removing the LSB (least significant bit) each time; S30. instantly starting a corresponding Reed-Solomon (RS) (252, 220) coder for coding once data are written into a certain register array, and then writing check bytes obtained through coding into corresponding bits of the corresponding register arrays to be registered; and S40. reading the data from the register arrays according to a certain format, thus obtaining the FEC coded data. The method and the circuit have the following advantages: the method is simple, convenient and effective and has high operability; and the circuit has a smaller scale and can achieve higher hardware circuit time sequence speed.

Description

technical field [0001] The present invention relates to FEC (forward error correction) coding technology in 10G EPON, specifically a kind of FEC hardware coding method and circuit based on 10G EPON ONU. Background technique [0002] In recent years, with the emergence of high-bandwidth services such as video-on-demand, online games, and IPTV (Interactive Internet Television), users' demand for access bandwidth has increased. The existing ADSL (Asymmetric Digital Subscriber Loop)-based The traditional broadband access method has been difficult to meet the user's requirements for high bandwidth, two-way transmission capability and security. Today, with the rapid development of broadband access, Passive Optical Network (PON) technology has become the preferred access mode of various operators due to its recognized characteristics of high speed, long distance, multi-service, low cost, and easy maintenance. [0003] However, with the improvement of user requirements, especially ...

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Application Information

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IPC IPC(8): H04L1/00
Inventor 朱齐雄姜涛
Owner FENGHUO COMM SCI & TECH CO LTD
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