移动软交换的容灾机制及工程实现

【作者】 戴波；

【导师】 隆克平； 王锦；

【作者基本信息】 电子科技大学 ， 电子与通信工程， 2009， 硕士

【摘要】 四川联通现网传统交换机均是爱立信BYB501设备。虽目前均在售后服务期限内。但随着在网运行时间加长,故障率也逐渐有所提高。且爱立信BYB501设备无法进行IP化改造,给设备今后的升级和组网带来不便。通过现网统计分析,对比传统交换机的容量、处理能力、体积、耗电量等等数据,认为将现网电路交换替换成软交换设备势在必行。不管是从现有网络经济性方向出发还是从未来向3G过渡,都需要将现有电路交换设备替换成软交换设备。由于MSC Server集中管理用户,容量较大,一旦MSC Server宕机,将会对本地网内用户业务带来灾难性的影响,因此MSC Server采用容灾机制在软交换的整个建设过程中起着非常重要的作用。软交换容灾机制作为本人的课题的研究重点。目前,成熟的软交换容灾机制主要有:1、MSC Server 1+1备份;2、MSC Server N+1备份;3、MSC POOL方式。本人针对这三种容灾方式的工作原理、实现机制进行了学习和研究。本文通过对软交换冗余备份方式的比较,选择了符合四川联通实际情况的软交换备份方案。相比于传统交换局,软交换局的容量一般比较大,由此衍生出软交换MSC Server比传统交换局更需要进行容灾以确保网络安全稳定的运行,本文对此进行了重点研究。经过华为Server N+1倒换测试,验证了主用MSC Server能够正常倒换到备用MSC Server,但下挂MGW有20-30分钟的业务中断。经过2008年“5.12”汶川特大地震,现网设备的容灾是大家普遍关心的话题。特别是核心网设备的容灾提到了更高的高度,很多设备要求进行物理地址容灾。有效的备份方式保证在突发灾害面前通过链路倒换将业务转移,保证“生命线”的畅通。这是我们每一个通信人义不容辞的责任。更多还原

【Abstract】 The living traditional MSC in Sichuan Unicom are BYB501 equipment provided by Ericsson. Although the current period in the after-sales service. But with the hardware at run-time longer, the failure rate is also gradually improve. Another point is there is no path for a BYB501 device with IP based transformation. It has brought big obstacle for node upgrade and network construction. Comparing with traditional MSC’s capacity, physical volume, power consumption, meanwhile through the KPI analysis, it is concluded that the necessity is very much imperative to replace them by softswitch MSC. Regardless of the economy from the existing network or from the direction of the future transition to 3G will require the existing circuit-switched equipment be replaced by soft-switching equipment.Due to some factors that MSC server has concentrated management scheme and big capacity, once the a MSC server crashes, it will cause disaster to the serving subscribers. Therefore the use of disaster recovery mechanism for MSC Server softswitch at the entire construction process plays an important role. Softswitch disaster recovery mechanism is the subject of my research focus. At present, At present, sophisticated Softswitch major disaster recovery mechanism has: 1, MSC Server 1 +1 backup; 2, MSC Server N +1 backup; 3, MSC POOL way. I for the three disaster recovery mode working principle, implementation mechanism of study and research.This paper singled out a suitable MSC server redundancy back up mode by comparison for Sichuan unicom. This is in line with the actual network situation. Comparing to traditional exchange, capacity of softswitch generally relatively large, thus derived from softswitch MSC Server more than the traditional need for disaster recovery to ensure the security and stability of networks operating. After Huawei Server N +1 switching test, verify the main MSC Server can successful switch to the standby MSC Server, but the belonging MGW has 20-30 minutes traffic interruption.After 2008, "5.12" WenChuan earthquakes, network disaster recovery are generally concerned by everyone. In particular, core network equipment, disaster recovery referred to a higher altitude, a lot of equipment requires physical address disaster recovery. Effective way to ensure the backup at the face of unexpected disasters through the link switching operations to ensure that expedite "lifeline". This is the obligatory responsibility of our people engaged in communication.更多还原