Method for extending real-time data channel of gigabit Ethernet
A Gigabit Ethernet and real-time data technology, which is applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of complex data processing, poor system stability, long development cycle, etc., and achieve simultaneous transmission and system stability Reliable, cost-effective results
Active Publication Date: 2012-07-25
HUAXIAO PRECISION SUZHOU
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Problems solved by technology
The implementation cost of Ethernet over TDM technology is too high, because the TDM network itself has the disadvantages of complex technology and high cost, and the price of Ehernet over TDM dedicated chips is also quite expensive
TDMover Ethernet technology is to transmit synchronous TDM real-time data in asynchronous Ethernet. It needs to use large buffer and complex sorting algorithm to deal with the loss of TDM data and clock caused by random delay and packet loss of Ethernet. Seriously affect the real-time performance of TDM signals, and the complexity of data processing also leads to poor system stability, long development cycle and high cost
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[0018] The invention proposes a method for adding a real-time data channel on a standard Gigabit Ethernet optical fiber transmission line. This method improves the current 8B / 10B encoding scheme, so that each 8bits Ethernet data corresponds to two independent 10bits encodings, and the real-time data stream up to 125Mbps is used to select it at the sending end. The "1" in the data stream " and "0" respectively correspond to a set of independent 10bits codes, which can be decoded at the receiving end according to the same rules to restore real-time data of GbE and 125Mbps, realizing simultaneous independent transmission of GbE+TDM. In order to ensure the DC balance of the synthesized 1.25Gbps code stream, the 125Mbps data stream can be serially scrambled in advance to balance the number of "0" and "1" in it, and select the difference between "0" and "1" in the 10B code Small code pattern, two independent 10bits codes corresponding to each 8bits Ethernet data, can be 5 "0", or on...
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The invention relates to a method for extending the real-time data channel of a gigabit Ethernet. Specifically, the method is that a 9B / 10B code table is designed and each 9B data corresponds to an independent 10B code; each 1B data of an extended 125Mbps real-time data channel is correspondingly stacked with each 8B data in a 1000Mbps Ethernet data at a transmitting terminal to form 9Bdata, a sole corresponding 10B code is obtained through searching in the 9B / 10B code table, the line transmission speed of the 10B code is still 1.25Gbps, and the 10B code is compatible with a standard gigabit Ethernet and can be transmitted on the original optical fiber line; and after a receiving terminal receives the 10B code, the 9B code is obtained through searching in the same 9B / 10B code table, so the 1000Mbps Ethernet data and the 125Mbps real-time data of the extended channel are restored. The invention improves 8B / 10B codes into (8+1) B / 10B codes, so the real-time data channel with maximum speed of 125Mbps is extended.
Description
technical field [0001] The invention relates to a method for extending a real-time data channel on a Gigabit Ethernet, and belongs to the technical field of communication and information system network transmission. Background technique [0002] Gigabit Ethernet (GbE, Gigabit Ethernet) has been widely used from desktops to metropolitan area networks. In order to solve the problem of coexistence and integration between the emerging packet switching network and the traditional time division multiplexing (TDM) circuit switching network that is still in operation in large numbers, the Ethernet over TDM technology that transmits Ethernet signals through the TDM network and the TDM over TDM technology that transmits TDM signals through the Ethernet network Ethernet technology has been developed and applied. The implementation cost of Ethernet over TDM technology is too high, because the TDM network itself has the disadvantages of complex technology and high cost, and the price of...
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IPC IPC(8): H04L1/00H04L12/56
Inventor 徐钊杨福锦姜秀柱刘景超马洪亮
Owner HUAXIAO PRECISION SUZHOU