CN105099543B - Network rapid protection method for SDH equipment - Google Patents

Abstract

The invention belongs to a protection method, and particularly relates to a network rapid protection method of SDH equipment. It includes: and judging a fault point, judging the position of the network fault point, wherein the network fault point may appear in an optical fiber link, an Ethernet link or backbone network equipment, and then selecting different network reconstruction modes according to different positions of the fault point. The invention has the following remarkable effects: through the arrangement of the invention, when the main transmission link fails, the transmission link with the optimal transmission effect can be quickly switched to, so that the time cost of system transmission is saved, the transmission link is optimized, and the system transmission effect is ensured to the greatest extent on the premise of ensuring the reliability of network communication.

Description

A fast network protection method for SDH equipment

technical field

The invention belongs to a protection method, in particular to a fast network protection method for SDH equipment.

Background technique

Synchronous Digital Hierarchy (SDH) is a comprehensive information transmission network that integrates multiplexing, line transmission and switching functions, and has standard interfaces. It is one of the most widely used technologies in the field of information transmission technology. The information structure level used by SDH is called Synchronous Transport Module STM-N (Synchronous Transport Module, N=1, 4, 16, 64), the most basic module is STM-1 (ie 155M), four STM-1 synchronous multiplexing Constitute STM-4 (namely 622M), 16 STM-1 or four STM-4 synchronous multiplexing constitute STM-16 (namely 2.5G).

The synchronous digital system has the following characteristics:

a) Unified the two major digital systems of 1.5Mbit/s and 2Mbit/s above the STM-1 level, and truly realized the worldwide standard of digital transmission system for the first time;

b) The synchronous multiplexing method and flexible multiplexing mapping structure are adopted, and the high-speed signal can be directly added and inserted into the low-speed branch signal only by using software;

c) Rich overhead bits are designed in the SDH frame structure, which enhances the fault detection capability of the network;

d) Reduces the need to separate transmission and multiplexing, simplifies hardware, and eases wiring congestion;

e) With the transparency of information payload, the network can transmit various payloads and their mixtures;

f) It has timing transparency. SDH works as a synchronous network, and network elements are connected to high-precision reference clocks, which can reduce frequency adjustment and improve network performance;

g) Improved network availability and bit error performance.

The SDH network is fully compatible with the existing network. The SDH optical transmission equipment that meets the military standard has strong environmental adaptability, high reliability, small size, large transmission capacity, rich service interfaces, long transmission distance, good confidentiality performance, and anti-electromagnetic interference. Features.

In general, the transmission of data in the network only needs the main link. As shown in Figure 1, the link from PC1 to PC2 only needs SDHA equipment and SDHC equipment as the intermediate transmission equipment of the backbone network. However, under certain application conditions, the requirements for transmission stability are relatively high, and a single link is prone to failure. Therefore, SDHB equipment and SDHD equipment will be added to the network as backups for SDHA equipment and SDHC equipment. However, at this time, the problem of the optimal path for data transmission arises again. During normal transmission, the transmission can be realized through the main link, that is, the link of PC1->SDHA->SDHC->PC2. If the link of PC1->SDHA When there is a problem with the road, SDHA->SDHC link, or SDHC->PC2 link, how to transmit data is the optimal solution, which needs to be determined by the method set in advance.

In the prior art, there is no method for optimizing the network transmission path for the SDH network.

Contents of the invention

Aiming at the defects of the prior art, the invention provides a fast network protection method for SDH equipment.

The present invention is achieved in that a kind of network fast protection method of SDH equipment comprises the following steps:

Step 1: Determine the point of failure

Determine the location of the network fault point. The network fault point may appear in the optical fiber link, Ethernet link or backbone network equipment.

Wherein the optical fiber link damage refers to SDHA->SDHC (or SDHC->SDHA) network failure;

Ethernet link damage refers to PC1->SDHA (or SDHC->PC2) network failure;

The damage of backbone network equipment refers to the failure of SDHA equipment (or SDHC equipment),

When the judgment result is that the optical fiber link is damaged, perform step 2;

When the judgment result is that the Ethernet link is damaged, perform step 3;

When the judgment result is that the backbone network equipment is damaged, go to step 4,

Step 2: The optical fiber link is damaged, and the network transmission is reconstructed

First enable the standby devices, namely SDHB devices and SDHD devices;

Then establish the transmission link of PC1->SDHA->SDHB->SDHD->SDHC->PC2,

Step 3: The Ethernet link is damaged, and the network transmission is reconstructed

When the transmission link of PC1->SDHA fails, activate the standby SDHB equipment;

Then establish the transmission link of PC1->SDHB->SDHA->SDHC->PC2,

When the transmission link of SDHC->PC2 fails, activate the backup SDHD device;

Then establish the transmission link of PC1->SDHA->SDHC->SDHD->PC2,

Step 4: The backbone network equipment is damaged, and the network transmission is reconstructed

When the SDHA equipment fails, activate the standby SDHB equipment;

Then establish the transmission link of PC1->SDHB->SDHD->SDHC->PC2,

When the SDHC transmission link fails, activate the backup SDHD device;

Then establish the transmission link of PC1->SDHA->SDHB->SDHD->PC2.

The remarkable effect of the present invention is that: through the setting of the present invention, when the main transmission link fails, it can quickly switch to the transmission link with the best transmission effect, saving the time cost of system transmission, optimizing the transmission link, Under the premise of ensuring the reliability of network communication, the transmission effect of the system is guaranteed to the greatest extent.

Description of drawings

Fig. 1 is a schematic diagram of network transmission with a transmission link of a backup device;

Fig. 2 is a schematic diagram of network transmission when a problem occurs in SDHA->SDHC (or SDHC->SDHA);

Fig. 3 is a schematic diagram of network transmission when a problem occurs in PC1->SDHA (or SDHC->PC2);

FIG. 4 is a schematic diagram of network transmission when an SDHA device (or SDHC device) has a problem.

detailed description

As shown in accompanying drawing 2～4, a kind of network fast protection method of SDH equipment comprises the following steps:

Step 1: Determine the point of failure

Determine the location of the network fault point. The network fault point may appear in the optical fiber link, Ethernet link or backbone network equipment.

Wherein the optical fiber link damage refers to SDHA->SDHC (or SDHC->SDHA) network failure;

Ethernet link damage refers to PC1->SDHA (or SDHC->PC2) network failure;

The damage of backbone network equipment refers to the failure of SDHA equipment (or SDHC equipment).

The method for judging the network fault point is a common method in the field, for example, the method for judging the network fault point built in the HSRP protocol.

When the judgment result is that the optical fiber link is damaged, perform step 2;

When the judgment result is that the Ethernet link is damaged, perform step 3;

When the judgment result is that the backbone network equipment is damaged, go to step 4.

Step 2: The optical fiber link is damaged, and the network transmission is reconstructed

First enable the standby devices, namely SDHB devices and SDHD devices;

Then establish the transmission link of PC1->SDHA->SDHB->SDHD->SDHC->PC2.

Step 3: The Ethernet link is damaged, and the network transmission is reconstructed

When the transmission link of PC1->SDHA fails, activate the standby SDHB equipment;

Then establish the transmission link of PC1->SDHB->SDHA->SDHC->PC2.

When the transmission link of SDHC->PC2 fails, activate the backup SDHD device;

Then establish the transmission link of PC1->SDHA->SDHC->SDHD->PC2.

Step 4: The backbone network equipment is damaged, and the network transmission is reconstructed

When the SDHA equipment fails, activate the standby SDHB equipment;

Then establish the transmission link of PC1->SDHB->SDHD->SDHC->PC2.

When the SDHC transmission link fails, activate the backup SDHD device;

Then establish the transmission link of PC1->SDHA->SDHB->SDHD->PC2.

Claims (1)

1. the network fast protection method of a kind of SDH equipment, it is characterised in that comprise the steps：

Step 1：Judge trouble point

Judge network failure point position, network failure point possibly be present at fiber link, ethernet link or backbone network and set It is standby,

Wherein fiber link damage refers to that SDHA- ＞ SDHC, or SDHC- ＞ SDHA network break down；

Ethernet link damage refers to that PC1- ＞ SDHA, or SDHC- ＞ PC2 network break down；

Backbone network device damage refers to that SDHA equipment, or SDHC equipment break down,

When judged result is that fiber link is damaged, step 2 is performed；

When judged result is that ethernet link damages, step 3 is performed；

When judged result is backbone network device damage, step 4 is performed,

Step 2：Fiber link is damaged, network transmission reconstruct

Stand-by equipment, i.e. SDHB equipment and SDHD equipment are enabled first；

Then PC1- ＞ SDHA- ＞ SDHB- ＞ SDHD- ＞ SDHC- ＞ PC2 transmission link is established,

Step 3：Ethernet link damages, network transmission reconstruct

When PC1- ＞ SDHA transmission link failure, standby SDHB equipment is enabled；

Then PC1- ＞ SDHB- ＞ SDHA- ＞ SDHC- ＞ PC2 transmission link is established,

When SDHC- ＞ PC2 transmission link failure, standby SDHD equipment is enabled；

Then PC1- ＞ SDHA- ＞ SDHC- ＞ SDHD- ＞ PC2 transmission link is established,

Step 4：Backbone network device damage, network transmission reconstruct

When SDHA equipment faults, standby SDHB equipment is enabled；

Then PC1- ＞ SDHB- ＞ SDHD- ＞ SDHC- ＞ PC2 transmission link is established,

When SDHC failures, standby SDHD equipment is enabled；

Then PC1- ＞ SDHA- ＞ SDHB- ＞ SDHD- ＞ PC2 transmission link is established.