Data transferring method based no synchronous digit transmission network

Abstract

The method involves inserting identifying information into service data that is transmitted, forming the service data on synchronous digital transmission channels in the SDH / Sonet network in agreement with inserted identifying information and transmitting the service data over the synchronous digital transmission channels. The receiving end distinguishes service data using the identifying information and distributes the data to different users.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a method for broadband data transmission through a synchronous digital transmission network. Background technique [0002] In Synchronous Digital Transport Network (SDH / SONET), more and more broadband service data needs to be transmitted. At present, there are two methods adopted to transmit broadband service data through SDH / SONET: [0003] One method is to directly map the data of the broadband data interface to the synchronous digital transmission channel of the synchronous digital transmission network for transmission. Each broadband data interface corresponds to a transmission channel, and each customer has an independent single or multiple synchronous digital transmission channels. As shown in Figure 1, the specific data processing process is: the synchronous digital transmission channel receives the message from the broadband data interface, and according to...

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Problems solved by technology

[0005] Through the introduction of the above two methods, it can be seen that the existing data transmission method based on the synchronous digital transmission network has the following disadvantages: each synchronous digital transmission channel can only be assigned to one customer, regardless of whether the customer is using it or not It must be reserved for the customer, resulting in low utilization efficiency of the synchronous digital transmission channel, and the cost that the customer needs to pay is relatively high; at the same time, when a synchronous digital transmission channel rented by a customer is connected into a logical loop, in order to avoid the broadcast loop The formation of the road must close some synchronous digital transmission channels, resulting in expensive synchronous digital transmission channels being idle, resulting in waste of customer investment; third, the existence of a large number of redundant synchronous digital transmission channels in the above method wastes limited transmission resources. And the spanning tree protocol is usually used for redundant backup protection. The protection switching time of the spanning tree protocol is as long as tens of seconds, which cannot meet the requirements of carrier-level protection, and will also cause oscillations, which will cause the network to be unstable for a long time; , for the same synchronous digital transmission channel, the above two methods cannot distinguish the data belonging to the same customer but with different business priorities. In the case of congestion or protection, they cannot be treated differently and cannot provide better services for customers.

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