摘要
在互联网的持续加速发展下,各种各样的新型大带宽应用喷薄而出,带宽需求量急剧增大,承载了数十Gb/s甚至Tb/s的速率的光传输网络一旦光纤毁坏将中断大量的业务,所以必须要提高光传输网络的生存能力,它的一个重要衡量指标即是倒换性能。提出一种应用于光传输网的保护组叠加倒换方法,支持业务保护功能的光传输设备可以在网络发生故障时主动将业务切换至备用通道上,提供业务自动恢复能力。利用FPGA实现硬件上的保护倒换叠加功能,且可令交叉芯片在业务交叉过程中以宿点作为对保护状态表和交叉表进行读取操作的索引,将倒换时间降低到几毫秒,可极大提高保护倒换性能。
With the continuous accelerated development of the Internet,a variety of new large bandwidth applications are spraying out,and the demand for bandwidth is increasing sharply.Once the optical transmission network carrying tens of Gb/s or even Tb/s rate is destroyed,a large number of services will be interrupted.Therefore,it is necessary to improve the viability of the optical transport network,one of its important measures is switching performance.This paper presents a protection group overlay and switching method for optical transmission networks.Optical transmission devices supporting service protection can actively switch services to standby channels when network failures occur,providing automatic service recovery capability.The protection switching overlay function on hardware is realized by using FPGA,and the sink point can be used as the index to read the protection status table and the cross table in the process of business crossover.The switching time can be reduced to several milliseconds,which can greatly improve the protection switching performance.
作者
侯磊
Hou Lei(Sino-Telecom Technology Co.,Inc.,Shanghai 201613,China)
出处
《信息技术与网络安全》
2019年第2期33-36,共4页
Information Technology and Network Security
关键词
FPGA
光传输网络
保护状态表
交叉表
FPGA(Field-Programmable Gate Array)
optical transport network
protection status table
cross table
