Self-adaptive access system and method of 1G Ethernet and OC (Optical Carrier) 48 network

Abstract

The invention provides a self-adaptive access system and method of 1G Ethernet and OC (Optical Carrier) 48 network. The self-adaptive access system is realized based on fpga (Field Programmable Gata Array). The fpga has the advantage of flexible online programmable characteristic and can switch network access types in a nanosecond level under the condition that power is not off. The self-adaptive access system also comprises a programmable crystal oscillator of a peripheral chip and a deserializing module serdes in the inner part of the fpga. The self-adaptive access method comprises the following steps: start depends on a signallost signal transferred to the fpga by a photoelectric converter and a global reset signal of a circuit; a start state IIC is not configured with the crystal oscillator in the circuit and detects the 1G Ethernet network type; and MAC (Multiaction Computer) fifo (first in, first out) or POS (Point of Sale) fifo is utilized to respectively detect the two network types. According the self-adaptive access system and method of the 1G Ethernet and the OC 48 network provided by the invention, the network access does not need any artificial setting; and if an optical fiber insertion action exists, the 1G Ethernet and the OC 48 network are automatically detected and adapted.

Description

technical field [0001] The invention belongs to the field of network communication, and specifically relates to a 1G Ethernet and OC48 network adaptive access system and method. Background technique [0002] In a complex network environment, 1G Ethernet and OC48 network access generally coexist, that is to say, their Line rates are equivalent, so for network equipment, the same network interface supports the above two network protocols. It is the most convenient solution to upgrade equipment or replace network access. They can share the same type of optical module, optical fiber and hardware circuit; but their working reference clocks are different. If the network device wants to successfully switch between these two types of network access, it must be replaced from the hardware. The frequency of the crystal oscillator is used to change the reference clock frequency of network access, so as to realize the mutual switching of the two networks. If a certain network type is s...

AI Technical Summary

Problems solved by technology

Therefore, if you want to decapsulate the encapsulated frames, which include Ethernet frames and PPP frames, network maintenance personnel must perform complex configurations. In the case of an error message

[0003] The invention with the patent number ZL20091002556.9 and titled "A POS Port Adaptive Implementation Method" discloses a network adaptive access method, but the invention has the following defects: 1. The matching cycle is too long, 5 ~10 seconds, and this length of time will cause a large amount of data loss; 2. In this method, it is judged that "SCRAMBLE self-adaptation" and "CRC self-adaptation" are sequential, and the formulation "SCRAMBLE error" is inappropriate. The mismatch of the line scrambling code may cause the POS interface processing module to fail to find the frame header, that is, the self-adaptive module cannot detect the frame and there is no such thing as a correct error in the CRC check. At this time, the counter cannot work; 3. This method does not support the adaptive access function with Ethernet

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