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SDH/SONET non-loading plug-in method and apparatus

A device and identification technology, applied in the field of optical transmission, can solve the problems of low circuit use efficiency and occupy large resources, and achieve the effect of simple circuit and strong reusability

Inactive Publication Date: 2010-09-29
UTSTARCOM TELECOM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Figure 4 The structure diagram of the above traditional method is shown in , in which the low-level pointer interpretation is a very complicated process, which requires the use of state machines and many storage units, takes up a lot of resources, and the circuit usage efficiency is low

Method used

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  • SDH/SONET non-loading plug-in method and apparatus
  • SDH/SONET non-loading plug-in method and apparatus
  • SDH/SONET non-loading plug-in method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Higher order unloaded insert

[0025] Figure 6 Shown is the structure of the high-order unloaded insertion device, which includes a frame structure count generator 1, which is used to generate row and column counts according to the frame structure indication signal; a pointer indication signal generator 2, which receives the above-mentioned row and column, and generates counts for Position the indication signals of H1 and H2; the unloaded data stream generator 3, according to the indication of the indication signal, insert the pointer value at the pointer position respectively and insert zero bytes into all other bytes, thereby generating the unloaded data stream; and the multiplexer 4. Choose whether to insert the unloaded data stream.

[0026] The working methods of these parts are described in detail below.

[0027] Such as Figure 7 As shown in step a, when the frame header is valid, the frame structure count generator 1 is cleared, and when the frame...

Embodiment 2

[0031] Example 2: Low level unloaded insert

[0032] Figure 10 It is a structural diagram of a low-level unloaded insertion device, which includes a frame structure count generator 10 for generating row and column counts according to the frame alignment signal; a pointer indication signal generator 20, according to the frame structure counter and H4_byte[1:0] Judgment is made to generate V1 and V2 indication signals; the unloaded data stream generator 30, according to the indication of the pointer signal, inserts the pointer value at the pointer position respectively, inserts all zero bytes in other bytes, and can decide whether to place the H4 byte position is inserted into the H4 sequence; and the multiplexer 40 is used to select whether to insert the unloaded data stream.

[0033] The work of these parts will be described in detail below.

[0034] like figure 2 The mapping structure of low-order TU-2, TU-11, and TU-12 is shown. It can be seen from the figure that it is...

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PUM

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Abstract

This invention relates to a method for plugging unload bytes of SDH / SONET and a circuit including generating high-low order channel to load the data stream, among which, the effective pointer value is plugged into H6, H2 high-order pointer positions to the high-order channel, zero bytes are plugged into other overhead bytes and net charge positions, thus, C2 bytes are zero and the lower reach device receives the channel without loading instruction information, the effective pointer value is given at V1, V2 bytes and zero is plugged into other overhead and net charge positions to realize that zero is plugged into the V5 byte unload bit so as to realize low order unload plug, which omits the pointer analysis circuit.

Description

technical field [0001] The present invention generally relates to the field of optical transmission, and in particular relates to an unloaded insertion method and device for saving circuit size and memory capacity in a Digital Synchronous Hierarchy (SDH) / Synchronous Optical Network (SONET) system. Background technique [0002] In synchronous digital transmission systems such as SDH / SONET, some channels often send empty traffic, causing downstream equipment to issue many useless alarms, thereby reducing the efficiency of equipment processing alarms. To solve this problem, an unloaded alarm is inserted on the high-order cross-connect and low-order cross-connect to tell the downstream device that the service of the high-order path or low-order path is a useless empty service, so that the downstream does not process the empty service; or when the local When the output has no valid data flow source, the downstream equipment is not alarmed by inserting and not loading. [0003] S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/14H04J3/16H04J3/08
Inventor 马彬
Owner UTSTARCOM TELECOM CO LTD
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