Fast and Accurate Provisioning of WDM Links for Data Center Interconnection with Minimal Probing

Khái niệm cốt lõi

A technique to quickly and accurately estimate the end-to-end GSNR of all possible optical paths using a quality of transmission probe channel, and a device software architecture that enables users and carriers to cooperate for fast provisioning of WDM links and flexible route switching.

Tóm tắt

The content discusses the increasing requirements for data center interconnection (DCI) services, which use fiber to connect distributed data centers in a metro area and quickly establish high-capacity optical paths between cloud services, mobile edge computing, and users. Several challenges remain in the development of DCI services, including the need for real-time WDM provisioning to quickly fulfill user demand and protocols to enable user-carrier cooperation automatically.
The authors propose an approach to estimate the end-to-end (EtE) GSNR accurately in a short time by simply applying a quality of transmission probe channel link by link, at a measurable, convenient arbitrary modulation format and modulator. This approach can be applied to coherent transceivers with various optical frequency ranges, modulators, and modulation formats installed at each connection point.
The authors also propose a Linux-based device software architecture that utilizes open interfaces, specifications, and architectures defined by Open ROADM MSA, TIP OOPT, and IGF. This architecture enables the carrier to monitor and control the user's transceiver remotely, ensuring safe operation and robustness of the DCI service.
The authors experimentally verified the accuracy of their approach using three different routes of 32 km/72 km/122 km in the C-band. The accuracy estimated from the sum of the measurements for each link was 0.6 dB, and the wavelength-dependent error was about 0.2 dB. They then used field fibers deployed in an urban area, a Linux-based transmission device software architecture, and coherent transceivers with different optical frequency ranges, modulators, and modulation formats, and completed the fast WDM provisioning of an optical path within 6 minutes.

Thống kê

There are increasing requirements for data center interconnection (DCI) services, which use fiber to connect any DC distributed in a metro area and quickly establish high-capacity optical paths between cloud services and mobile edge computing and the users.
The target response time required for rapid response to fast time-varying traffic requests and prompt optical path restoration in the event of disasters is around 10 minutes.
The latency for ultra-low latency services for inter-computer communications is assumed to be within 2 ms, corresponding to a metro area of roughly 200 km in radius.
The accuracy estimated from the sum of the measurements for each link was 0.6 dB, and the wavelength-dependent error was about 0.2 dB.
The fast WDM provisioning of an optical path was completed within 6 minutes using field fibers deployed in an urban area.

Trích dẫn

"The target response time required for (1) and (2) is set to be around 10 minutes (For (2), the case where the quality of transmission (QoT) of multiple optical links are degraded at once is included, this target is defined as the time required to restore one end-to-end (EtE) optical path between a particular user's muxponder)."
"The latency in (3) is assumed to be within 2 ms, dominated by fiber propagation delay. This delay corresponds to a metro area of roughly 200 km in radius, depending on the fiber installation conditions."
"For the operational EtE GSNR measurements, the accuracy estimated from the sum of the measurements for each link was 0.6 dB, and the wavelength-dependent error was about 0.2 dB."
"Then, using field fibers deployed in an urban area, a Linux-based transmission device software architecture, and coherent transceivers with different optical frequency ranges, modulators, and modulation formats, the fast WDM provisioning of an optical path was completed within 6 minutes."

Thông tin chi tiết chính được chắt lọc từ

Fast WDM provisioning with minimal probing

by Hideki Nishi... lúc arxiv.org 04-09-2024

https://arxiv.org/pdf/2309.07359.pdf

Yêu cầu sâu hơn

How can the proposed approach be extended to accommodate other form factors, such as QSFP-DD, which are widely used by data center operators?

To extend the proposed approach to accommodate other form factors like QSFP-DD, which are commonly used in data centers, the device software architecture based on containers and TAI can be adapted to incorporate the specific control interfaces and functionalities of QSFP-DD transceivers. This adaptation would involve developing modules or libraries within the architecture that can interact with QSFP-DD transceivers, enabling the monitoring, control, and optimization of these devices in a similar manner to the CFP2-DCO transceivers. By integrating the necessary specifications and protocols for QSFP-DD transceivers into the existing architecture, DCX operators can ensure seamless interoperability and management of a diverse range of transceiver form factors within their optical networks.

How can the device software architecture based on containers and TAI be further leveraged by DCX operators to provide extended support services for their users?

DCX operators can further leverage the device software architecture based on containers and TAI to provide extended support services for their users by enhancing the capabilities of the architecture to enable advanced monitoring, troubleshooting, and maintenance functionalities. This can be achieved by integrating additional features such as real-time performance monitoring, automated fault detection and isolation, predictive maintenance based on telemetry data, and remote configuration management for user equipment. By utilizing the containerized architecture and TAI interface, DCX operators can streamline the deployment of these enhanced services across their network infrastructure, ensuring efficient and reliable operation while offering proactive support to users. Additionally, the architecture can facilitate the implementation of secure and scalable service provisioning mechanisms, enabling DCX operators to deliver tailored support services that meet the evolving needs of their users.

How can the proposed approach be extended to accommodate other form factors, such as QSFP-DD, which are widely used by data center operators?

To extend the proposed approach to accommodate other form factors like QSFP-DD, which are commonly used in data centers, the device software architecture based on containers and TAI can be adapted to incorporate the specific control interfaces and functionalities of QSFP-DD transceivers. This adaptation would involve developing modules or libraries within the architecture that can interact with QSFP-DD transceivers, enabling the monitoring, control, and optimization of these devices in a similar manner to the CFP2-DCO transceivers. By integrating the necessary specifications and protocols for QSFP-DD transceivers into the existing architecture, DCX operators can ensure seamless interoperability and management of a diverse range of transceiver form factors within their optical networks.