CN105099543B - Network rapid protection method for SDH equipment - Google Patents
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Abstract
Description
技术领域technical field
本发明属于保护方法,具体涉及一种SDH设备的网络快速保护方法。The invention belongs to a protection method, in particular to a fast network protection method for SDH equipment.
背景技术Background technique
同步数字体系(Synchronous Digital Hierarchy,SDH)是一种将复接、线路传输及交换功能融为一体、并具有标准接口的综合信息传送网络,是信息领域在传输技术方面应用最为广泛技术之一。SDH采用的信息结构等级称为同步传送模块STM-N(SynchronousTransport Module,N=1,4,16,64),最基本的模块为STM-1(即155M),四个STM-1同步复用构成STM-4(即622M),16个STM-1或四个STM-4同步复用构成STM-16(即2.5G)。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).
同步数字体系具有以下特点:The synchronous digital system has the following characteristics:
a)在STM-1等级以上统一了1.5Mbit/s和2Mbit/s两大数字体系,首次真正实现了数字传输体制上的世界性标准;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)采用了同步复用方式和灵活的复用映射结构,只需利用软件即可使高速信号一次直接分插出低速支路信号;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)SDH帧结构中设计了丰富的开销比特,增强了网络的故障检测能力;c) Rich overhead bits are designed in the SDH frame structure, which enhances the fault detection capability of the network;
d)减少了将传输和复用分开的需要,简化了硬件,缓解了布线拥挤;d) Reduces the need to separate transmission and multiplexing, simplifies hardware, and eases wiring congestion;
e)具有信息净负荷的透明性,网络可以传送各种净负荷及其混合体;e) With the transparency of information payload, the network can transmit various payloads and their mixtures;
f)具有定时透明性,SDH是作为同步网工作的,网元连接至高精度基准时钟,可以减少调整频率和改善网络性能;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)改善了网络可用性和误码性能。g) Improved network availability and bit error performance.
SDH网络与现有网络能完全兼容,满足军用标准的SDH光传输设备具有环境适应能力强、可靠性高、体积小、传输容量大、业务接口丰富、传输距离远、保密性能好、抗电磁干扰等特点。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.
在一般情况下,网络中数据的传输只需要主链路。如附图1所示,PC1到PC2的链路只需要SDHA设备和SDHC设备作为主干网中间传输设备即可。但是在某些应用条件下,对传输稳定性的要求比较高,单一链路容易产生故障,因此网络中会增加SDHB设备和SDHD设备作为SDHA设备和SDHC设备的备份。然而,此时又出现了数据传输最优路径的问题,当正常传输时,可以通过主链路,即PC1->SDHA->SDHC->PC2的链路实现传输,如果PC1->SDHA的链路出现问题、SDHA->SDHC的链路出现问题、SDHC->PC2的链路出现问题时,数据如何传输是最优方案,是需要依靠提前设置的方法确定的。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.
现有技术中尚没有针对SDH网络进行网络传输路径优化的方法。In the prior art, there is no method for optimizing the network transmission path for the SDH network.
发明内容Contents of the invention
本发明针对现有技术的缺陷,提供一种SDH设备的网络快速保护方法。Aiming at the defects of the prior art, the invention provides a fast network protection method for SDH equipment.
本发明是这样实现的:一种SDH设备的网络快速保护方法,包括下述步骤:The present invention is achieved in that a kind of network fast protection method of SDH equipment comprises the following steps:
步骤一:判定故障点Step 1: Determine the point of failure
判断网络故障点所在位置,网络故障点可能出现在光纤链路、以太网链路或主干网设备,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.
其中光纤链路损坏是指SDHA->SDHC(或SDHC->SDHA)的网络出现故障;Wherein the optical fiber link damage refers to SDHA->SDHC (or SDHC->SDHA) network failure;
以太网链路损坏是指PC1->SDHA(或SDHC->PC2)的网络出现故障;Ethernet link damage refers to PC1->SDHA (or SDHC->PC2) network failure;
主干网设备损坏是指SDHA设备(或SDHC设备)出现故障,The damage of backbone network equipment refers to the failure of SDHA equipment (or SDHC equipment),
当判断结果为光纤链路损坏时,执行步骤二;When the judgment result is that the optical fiber link is damaged, perform step 2;
当判断结果为以太网链路损坏时,执行步骤三;When the judgment result is that the Ethernet link is damaged, perform step 3;
当判断结果为主干网设备损坏时,执行步骤四,When the judgment result is that the backbone network equipment is damaged, go to step 4,
步骤二:光纤链路损坏,网络传输重构Step 2: The optical fiber link is damaged, and the network transmission is reconstructed
首先启用备用设备,即SDHB设备和SDHD设备;First enable the standby devices, namely SDHB devices and SDHD devices;
然后建立PC1->SDHA->SDHB->SDHD->SDHC->PC2的传输链路,Then establish the transmission link of PC1->SDHA->SDHB->SDHD->SDHC->PC2,
步骤三:以太网链路损坏,网络传输重构Step 3: The Ethernet link is damaged, and the network transmission is reconstructed
当PC1->SDHA的传输链路故障时,启用备用的SDHB设备;When the transmission link of PC1->SDHA fails, activate the standby SDHB equipment;
然后建立PC1->SDHB->SDHA->SDHC->PC2的传输链路,Then establish the transmission link of PC1->SDHB->SDHA->SDHC->PC2,
当SDHC->PC2的传输链路故障时,启用备用的SDHD设备;When the transmission link of SDHC->PC2 fails, activate the backup SDHD device;
然后建立PC1->SDHA->SDHC->SDHD->PC2的传输链路,Then establish the transmission link of PC1->SDHA->SDHC->SDHD->PC2,
步骤四:主干网设备损坏,网络传输重构Step 4: The backbone network equipment is damaged, and the network transmission is reconstructed
当SDHA设备故障时,启用备用的SDHB设备;When the SDHA equipment fails, activate the standby SDHB equipment;
然后建立PC1->SDHB->SDHD->SDHC->PC2的传输链路,Then establish the transmission link of PC1->SDHB->SDHD->SDHC->PC2,
当SDHC的传输链路故障时,启用备用的SDHD设备;When the SDHC transmission link fails, activate the backup SDHD device;
然后建立PC1->SDHA->SDHB->SDHD->PC2的传输链路。Then establish the transmission link of PC1->SDHA->SDHB->SDHD->PC2.
本发明的显著效果在于:通过本发明的设置,可以在主传输链路发生故障时,快速切换到传输效果最优的传输链路上,节约了系统传输的时间成本,优化了传输链路,在保证网络通信可靠性的前提下,最大程度的保证系统传输效果。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.
附图说明Description of drawings
图1是带有备份设备的传输链路的网络传输示意图;Fig. 1 is a schematic diagram of network transmission with a transmission link of a backup device;
图2是SDHA->SDHC(或SDHC->SDHA)出现问题时,网络传输示意图;Fig. 2 is a schematic diagram of network transmission when a problem occurs in SDHA->SDHC (or SDHC->SDHA);
图3是PC1->SDHA(或SDHC->PC2)出现问题时,网络传输示意图;Fig. 3 is a schematic diagram of network transmission when a problem occurs in PC1->SDHA (or SDHC->PC2);
图4是SDHA设备(或SDHC设备)出现问题时,网络传输示意图。FIG. 4 is a schematic diagram of network transmission when an SDHA device (or SDHC device) has a problem.
具体实施方式detailed description
如附图2~4所示,一种SDH设备的网络快速保护方法,包括下述步骤:As shown in accompanying drawing 2~4, a kind of network fast protection method of SDH equipment comprises the following steps:
步骤一:判定故障点Step 1: Determine the point of failure
判断网络故障点所在位置,网络故障点可能出现在光纤链路、以太网链路或主干网设备。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.
其中光纤链路损坏是指SDHA->SDHC(或SDHC->SDHA)的网络出现故障;Wherein the optical fiber link damage refers to SDHA->SDHC (or SDHC->SDHA) network failure;
以太网链路损坏是指PC1->SDHA(或SDHC->PC2)的网络出现故障;Ethernet link damage refers to PC1->SDHA (or SDHC->PC2) network failure;
主干网设备损坏是指SDHA设备(或SDHC设备)出现故障。The damage of backbone network equipment refers to the failure of SDHA equipment (or SDHC equipment).
判断网络故障点所用的方法是本领域的常用方法,例如HSRP协议中自带的网络故障点判断方法。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.
当判断结果为光纤链路损坏时,执行步骤二;When the judgment result is that the optical fiber link is damaged, perform step 2;
当判断结果为以太网链路损坏时,执行步骤三;When the judgment result is that the Ethernet link is damaged, perform step 3;
当判断结果为主干网设备损坏时,执行步骤四。When the judgment result is that the backbone network equipment is damaged, go to step 4.
步骤二:光纤链路损坏,网络传输重构Step 2: The optical fiber link is damaged, and the network transmission is reconstructed
首先启用备用设备,即SDHB设备和SDHD设备;First enable the standby devices, namely SDHB devices and SDHD devices;
然后建立PC1->SDHA->SDHB->SDHD->SDHC->PC2的传输链路。Then establish the transmission link of PC1->SDHA->SDHB->SDHD->SDHC->PC2.
步骤三:以太网链路损坏,网络传输重构Step 3: The Ethernet link is damaged, and the network transmission is reconstructed
当PC1->SDHA的传输链路故障时,启用备用的SDHB设备;When the transmission link of PC1->SDHA fails, activate the standby SDHB equipment;
然后建立PC1->SDHB->SDHA->SDHC->PC2的传输链路。Then establish the transmission link of PC1->SDHB->SDHA->SDHC->PC2.
当SDHC->PC2的传输链路故障时,启用备用的SDHD设备;When the transmission link of SDHC->PC2 fails, activate the backup SDHD device;
然后建立PC1->SDHA->SDHC->SDHD->PC2的传输链路。Then establish the transmission link of PC1->SDHA->SDHC->SDHD->PC2.
步骤四:主干网设备损坏,网络传输重构Step 4: The backbone network equipment is damaged, and the network transmission is reconstructed
当SDHA设备故障时,启用备用的SDHB设备;When the SDHA equipment fails, activate the standby SDHB equipment;
然后建立PC1->SDHB->SDHD->SDHC->PC2的传输链路。Then establish the transmission link of PC1->SDHB->SDHD->SDHC->PC2.
当SDHC的传输链路故障时,启用备用的SDHD设备;When the SDHC transmission link fails, activate the backup SDHD device;
然后建立PC1->SDHA->SDHB->SDHD->PC2的传输链路。Then establish the transmission link of PC1->SDHA->SDHB->SDHD->PC2.
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CN1764144A (en) * | 2005-09-30 | 2006-04-26 | 烽火通信科技股份有限公司 | Method for carrying out VPR protection inversion in network |
CN201114093Y (en) * | 2007-06-15 | 2008-09-10 | 上海未来宽带技术及应用工程研究中心有限公司 | Optical fibre line protector for protecting PON network |
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JP2002359627A (en) * | 2001-05-30 | 2002-12-13 | Nec Corp | Protection system, virtual concatenation processing block, node and ring network |
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CN1764144A (en) * | 2005-09-30 | 2006-04-26 | 烽火通信科技股份有限公司 | Method for carrying out VPR protection inversion in network |
CN201114093Y (en) * | 2007-06-15 | 2008-09-10 | 上海未来宽带技术及应用工程研究中心有限公司 | Optical fibre line protector for protecting PON network |
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