Transmission method for realizing multi-port arbitrary rate integration

Abstract

Transmission is carried out through a high speed channel by pooling data received from multiple ports in different receiving speeds through pure data content and clock frequency of transparent transmitting service data so as to realize pooled transmission for multiple ports at optional speeds. The invention supports transmission at optional speed, whose access speed is lower than the said high-speed channel. Thus, one OUT unit module can realize accesses for multiple services, reduces designing cost. Functions of pooling multiple ports and mixing transmission makes system configuration flexible, reduces classes of module and spare parts. Transparent transmission avoids treating protocol for access services so as to simplifying module design.

Description

technical field [0001] The invention relates to the technical field of Dense Wavelength Division Multiplexing (DWDM), in particular to a transmission method for realizing multi-port arbitrary rate convergence. Background technique [0002] With the continuous development of communication technology, optical fibers can be used to transmit various services such as data, voice and images. Table 1 shows the more common services and their transmission rates at present. [0003] business name Transmission rate (Mbps) Fast Ethernet Service (FE) 125 Gigabit Ethernet service (GE) 1250 Fiber Distributed Data Interface (FDDI) 125 Storage Networking Business (ESCON) 200 Storage network business (Fibre Channel / FICON) 1062.5 Digital Video Broadcasting (DVB) 270 High Definition Digital Television (HDTV) 1485 Asynchronous Transfer Service (ATM) 155 / 622 Synchronous Digital Transport Service (STM-1 / OC-3) 155 Synchronous Dig...

AI Technical Summary

Problems solved by technology

[0010] The above method has the following disadvantages: when a low-speed service, such as a 125Mbps Fast Ethernet (FE) service access OTU, then a 125Mbps will take up a wavelength resource, and like this, the bandwidth resource of the wavelength will be seriously wasted

[0015] The disadvantage of the above method is that: since the clock frequency of the branch service corresponding to each port of the OTU unit cannot be transparently transmitted, the receiver cannot identify the frequency offset between it and the sender, and the receiver of the OTU unit must perform rate adaptation , to achieve the purpose of eliminating frequency offset through rate adaptation, and the rate adaptation operation is associated with the type of business

But various modules are difficult to be compatible

In this way, the flexibility of the OTU module is poor, and it is difficult to realize the transmission of mixed services. For example, it is very difficult to realize the aggregation of 1×GE+1×STM-4 to STM-16

If you want to adapt to various business convergence, you must design various types of OTU modules to enable rate adaptation for various types of services, which will inevitably increase the system design cost

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