ADM method, device and system based on universal framing protocol

Abstract

An ADM method based on universal framing protocol and its device and system are disclosed. Multiple gigabit Ethernets between multiple nodes are connected and complexed according to a universal framing protocol for a byte synchronizing interface whose bandwidth is lower than the sum of the peak bandwidths of multiple Ethernets, multiple gigabit Ethernets can multiplex the data via buffer, and when network congestion occurs, the data is processed by priority.

Description

technical field [0001] The present invention relates to network multiplexing technology, in particular to broadband network channel multiplexing technology, specifically an add / drop multiplexing method, device and system based on general framing procedures. Background technique [0002] With the continuous development of the Internet, the amount of data transmitted on the network is getting larger and larger, and the previous narrowband network can no longer meet people's needs, so many representative broadband technologies have emerged. The Generic Framing Procedure (GFP) is defined in ITU-T G.7041 / Y.1303, which is a new type of data link framing protocol, mainly for block-encoded or packet-oriented data based on byte-synchronous transmission channels flow. [0003] Unlike HDLC: High Level Data Link Control, which fills the frame header with specific characters to determine the frame boundary, GFP draws on the frame positioning method of ATM: Asynchronous Transfer Mode, us...

AI Technical Summary

Problems solved by technology

The virtual container method is to independently designate a virtual container for each service. Regardless of whether the service utilizes the bandwidth of the virtual container, the bandwidth of the virtual container is reserved for the service. However, in a certain operator composed of multiple GE ADMs In the network, the actual utilization rate of each GE is about 30%, so the bandwidth reserved for each GE is actually wasted and cannot be used by other services

Although it is possible to adjust the virtual container bandwidth occupied by each service, for example, the original 8 VC4s required by GE are now adjusted to 4 VC4s, but this method is less flexible and cannot provide GE services on the upper layer during traffic peaks. Enough bandwidth, and the GE port traffic of the upper-layer router is reduced in disguise, and the business capabilities of the upper-layer equipment are not fully utilized. At the same time, the method of reducing the bandwidth of the virtual container still does not achieve the balance between multiple services by using the "peak-valley effect" Traffic requirements, to achieve the purpose of statistical multiplexing

Although GE ADM implemented in GFP CID mode can allow multiple GE services to share the physical bandwidth of the same bearer pipe, in fact, because the traffic of each GE cannot be accurately predicted, and GFP does not define a flow control mechanism, in order to enable the upper-layer services to provide Better transmission characteristics. The existing implementation method actually leaves bandwidth for the sum of the peak traffic of each GE on the lower-layer bearer pipeline. The disadvantage of this method is obvious. Although the realization function of GE ADM is simplified, But it reduces the bandwidth carrying efficiency on a single wavelength

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