Data transmission method from high speed Ethernet to optical transmission network and related interface and equipment

Abstract

The present invention provides a method of the date transmission from high speed internet to Optical Transport Network (OTN), a network interface and an equipment based on the method, the basic idea thereof is realizing the wireless transmission from high speed internet business to OTN network through three steps: flow control, speed match and mapping packaging. Based on the existing network structure the three steps are completed respectively by the medium access control sublayer, physical coding sublayer and Optical Transport Network access sublayer. Using the invention the transmission from high speed internet business to OTN network transparently is realizing directly in physical layer only by the raw data mapping packaging. The transmission can be carried out in the form which is completely accorded with the standard and the efficiency and quality of the business transmission is guaranteed due to rate matching during mapping.

Description

technical field [0001] The invention relates to the field of network technology, in particular to the seamless connection technology of high-speed Ethernet (10 Gigabit or above) and optical transmission network. Background technique [0002] The 802.3 Ethernet (Ethernet) protocol has undergone a rapid development process since its birth, and has now become an undisputed de facto standard within the scope of a local area network (LAN, Local-Area Network). Its transmission form has developed from the initial 10M thick cable bus to thin cable 10Base2, then to 1Base5, twisted pair 10Base-T, and then to 100Base-TX for Fast Ethernet Category 5 transmission, 100BaseT4 for Category 3 transmission and optical fiber The 100BaseFX for transmission, and the subsequent Gigabit Ethernet, include 1000Base-SX for short-wavelength optical transmission, 1000Base-LX for long-wavelength optical transmission, and 1000Base-T for five-category line transmission. In 2002, IEEE officially passed th...

AI Technical Summary

Problems solved by technology

[0010] 5. Use 10GE LAN interface to directly map 10GE services to OTU2. Since the data rate of 10GE services is slightly higher, this method needs to occupy a part of the forward error correction (FEC, Forward Error Correction) bytes of OTU2, which reduces the cost of FEC. gain;

[0012] The above schemes 1, 2, 3, and 4 require two or more mapping processes to realize the mapping from 10G MAC frame to OTU2, which not only increases the complexity of the device in physical design, but also requires the use of complex encapsulation Technology encapsulates 10G MAC frames into some standard intermediate data packets for transmission, which reduces the efficiency of transmission

Although solutions 5 and 6 can directly realize the transparent transmission of 10GE services to the OTN network at the PHY layer, they either need to occupy a certain FEC area to transmit 10GE services or need to expand the OTU2 frame. Both of the above two solutions destroy the standard form of the OTU2 frame. It has caused huge obstacles to the docking of different chips; and in order to ensure the coding gain of FEC, scheme 5 needs to adopt more complex enhanced FEC, which cannot achieve both efficiency and transmission quality; while scheme 6 does not meet the specifications and cannot smoothly transition to Future 40Gbps transmission environment, because if some OTUs are at 10.7GHz and other OTUs are at 11.1GHz, it is impossible to combine multiple OTUs from different customers in a multiplexed manner

To sum up, it can be seen that the current processing methods are various, each has its own defects, and it is easy to form a network "island", which is not convenient for network docking processing and information sharing

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