| 省级气象宽带网可靠性设计 |
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| 引用本文： | 陈晓宇,张永华,吴兆雄,王佳,孙鹏.省级气象宽带网可靠性设计[J].应用气象学报,2013,24(6):761-768. |
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| 作者姓名： | 陈晓宇 张永华 吴兆雄 王佳 孙鹏 |
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| 作者单位： | 1.广东省气象信息中心，广州 510080 |
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| 基金项目： | 资助项目：公益性行业（气象）科研专项（GYHY201206031） |
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| 摘 要： | 气象业务的发展和社会需求的增长，对广域宽带网络系统提出更高要求，不但要求传输的数据量大，时效性强，而且要求其可靠性高。目前各省级气象局的宽带网可靠性设计，大都采用降级备份，无法做到双链路自动切换、无缝备份，难以满足气象业务7×24 h从不间断的实际需求，网络可靠性有待进一步提高。该文提出一种基于双向转发检测 (BFD) 和策略路由技术的网络可靠性设计方案，应用该方案不仅使网络结构和带宽有大幅提升，还能实现业务分流、链路冗余和故障自动切换，提高气象宽带网的可靠性水平。该方案经严格测试后，已依托广东省气象宽带网得以实现并投入业务运行，效果良好。同时，该设计对其他省级气象网络建设有一定参考价值。
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| 关 键 词： | 气象宽带网 可靠性 链路检测 业务分流 链路冗余 |
| 收稿时间： | 2013-02-20 |
Reliability Design of Meteorological Broadband Network at Provincial Level |
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| Chen Xiaoyu,Zhang Yonghu,Wu Zhaoxiong,Wang Jia and Sun Peng.Reliability Design of Meteorological Broadband Network at Provincial Level[J].Quarterly Journal of Applied Meteorology,2013,24(6):761-768. |
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| Authors: | Chen Xiaoyu Zhang Yonghu Wu Zhaoxiong Wang Jia and Sun Peng |
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| Affiliation: | 1.Guangdong Provincial Meteorological Information Center, Guangzhou 5100802.Key Laboratory of Regional Numerical Weather Prediction, Guangzhou 5100803.Meteorological Science and Technology Training Center of Guangdong Province, Guangzhou 510080 |
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| Abstract: | With the rapid development of information technology, the demand of connectivity keeps rising and the scale of network keeps expanding. Design and implementation of a reliable wide-area-network are critical for information transmission. With the development of meteorological services and growth of social needs, observations and forecast data gradually become larger and call for timeliness. Simple network infrastructure is no longer a guarantee for reliable transmission and highly reliable network is desired, not only for mass data transmission, but also for higher reliability. At present, the reliability of broadband network at provincial level is normally realized by taking a downgrade backup. But the bandwidth of backup link is narrow, so the transmission performance cannot catch up with the original link. Besides, it's unable to switch links automatically, and manual intervention is still needed.An original network reliability designing method is proposed based on BFD (bidirectional forwarding detection), NQA (network quality analysis) network reliability designing scheme, and strategy of routing technology. Through summarizing the network reliability research status, analyzing the meteorological broadband network reliability, the design and realization of this new meteorological broadband network is discussed from three aspects: The network backup, the flow sharing and the automatically switching. The application of the scheme has improved the network structure and bandwidth of the meteorological Province-City-County network system, and also has realized network backup, flow sharing and automatic switching on faults, which improves the reliability level greatly. There are 3 challenges in the design and implementation of this network. The first is the implementation of redundancy network with heterogeneous transmission links, the second is the routing redundancy of physical link testing, and the last is the real-time switching at business level of task types. The scheme has been tested strictly and successfully implemented in meteorological broadband network of Guangdong Province, and it's also suitable for meteorological network design of other provinces. |
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| Keywords: | meteorological broadband network reliability link detection distribution of business data flow link redundancy |
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