Fault Diagnosis And Alarms Transfer Of A Miniature And Low-cost 100G Optical Transmission System

The rise of cloud computing,mobile 4G/5G internet,etc,are driving network capacity demand rapidly.The traditional 10 G network is facing enormous challenges due to its limited capacity.As a result,large data center switch and router are being upgraded to 100 G OTN interface,which is driving the massive deployment of the 100 G backbone network.Because of the high-cost and large volume and high power dissipation of the 100 G backbone device,they don’t applicable to the metropolitan area networks.Therefore metropolitan area networks and access network will become the new bottleneck of network.The massive deployment of the 100 G networks relieve the demand of network capacity,which leds that optical network becomes increasingly complex,in the 100 G transmission system,when there is a sudden link failure occurring on either client side or long haul transmission side,or the sudden alarm of power,the alarm signal must be delivered to remote equipment instantly,otherwise the remote equipment will still think the transmission line is in normal situation,and continually transmit data to 100 G switch or router,but these data information are really garbage.In this situation,the thesis proposes a new miniature and low-cost 100 G technology used in metropolitan area networks.Furthermore,in order to do necessary link failure and OAM management,the thesis further proposes a scheme to implement fault diagnosis and alarms transfer to ensure the safety of network.Firstly,the thesis introduces the overall concept,focuses on the OTN recommendation of G.709,introduce the overhead of OTN frame.The thesis proposes to use 2 bytes RES of OTN frame OTUk overhead to carry alarms information to transport warning signal between two dervices of remote site.Secondly,based on this research objectives,the thesis conducts the study of fault diagnosis and alarms transfer,do circuit design of Dying Gasp and link alarm of CFP and SFP +.Once the FPGA get the los alarm,FPGA will insert the los signal into the RES overhead of OTN famer,and then send this link failure message to the remote site device.When the link loss message is embedded and transmitted to the remote device together with the 100 G real traffic,the receiving alarm signals will make the remote device stop sending the optical signal to its associated 100 G switch or router to prevent garbage data or spam.When the link failure is re-covered,the system will detect it and do automatic recovery as well as alarm clearance accordingly.Finally,build hardware testing environment on the system hardware platform to test the reliability of 100 G transmission system and alarms transfer.Test results show that the system can operate normally and stably,moreover the system can implement fault diagnosis and alarms transfer.