Method, network equipment and system for data transmission

Abstract

The invention discloses a method, network equipment and a system for data transmission, which can be applied to star and tree networks and dual-homing looped networks. The method comprises that: in a downlink direction, a master node transmits a downlink service signal to a slave node in a mode of optical layer broadcast, wherein a continuous optical signal which carries the downlink service signal also comprises an uplink bandwidth map; the slave node and the master node are connected by an OB (Optical Burst optical burst) channel; and the slave node adapts an uplink service signal to different OBUs for performing photoelectric conversion and transmitting a burst optical signal in a burst mode according to the number and serial number of the OBUs distributed to nodes in the uplink bandwidth map transmitted by the master node. The method, equipment and system easily realize burst amplification and high-speed burst receiving so as to better meet the requirements on long distance, large bandwidth and high transmission quality.

Description

technical field [0001] The present invention relates to the communication field, in particular to a data transmission method, network equipment and system. Background technique [0002] In the metropolitan area transmission network, the access point is generally connected to the aggregation point through direct optical fiber connection; while in the data communication network, the DSLAM (Digital Subscriber Line Access Multiplexer) located at the edge layer Generally, they are connected to the switch through direct fiber optic connection. Therefore, there are a large number of star or tree networking at the edge layer of the metro transport network. [0003] On the other hand, due to the continuous growth of user traffic in recent years, the traditional copper wire transmission technology cannot meet the user's access bandwidth requirements, and the mainstream technology PON (Passive Optical Network) in FTTx has begun to rise. PON technology increases the bandwidth of optic...

AI Technical Summary

Problems solved by technology

In this way, the optical power on a certain wavelength will continue to change, but the frequency and amplitude of the change are uncertain, which may eventually lead to a burst receiver power locking error or failure to lock, unable to receive signals correctly, and the system is unavailable

However, if optical power amplification is not used, WDM+TDM PON technology cannot meet the requirements of long distance and large bandwidth

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