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.
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[0051] The present invention will be further described in detail below in conjunction with the drawings.
[0052] The present invention provides a FEC hardware encoding method and circuit based on 10G EPON ONU, which is used to implement FEC hardware encoding in the upstream direction in 10G EPON ONU. The hardware circuit of the invention is simple to implement, has a small circuit scale, and can achieve higher Hardware timing speed.
[0053] In order to better understand the present invention, the following first introduces the structure of the 10G EPON ONU in the upstream direction.
[0054] The upstream structure of 10G EPON ONU specified in the IEEE802.3ay standard is as follows: figure 1 As shown, according to the transmission direction of the upstream data flow in the ONU (optical network unit), the upstream processing process in the ONU is described as follows: The RS layer (coordination sublayer) divides the upper layer data according to the XGMII interface (10Gigabit Media I...
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