Hybrid Control Plane Data Link Agent for FSO Error Correction
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Solution Overview
Problem
Current telecommunication networks face challenges in managing transmission interruptions due to atmospheric impairments and object interference in Free Space Optics (FSO) links, as conventional re-transmission methods at higher layers are inefficient and unsuitable for real-time communication, leading to service quality issues and race conditions.
Innovation Solution
The implementation of a method that allows control plane messages to be transmitted through the data plane using data plane frames with markings, enabling line-rate transmission and correction of FSO transmission errors via automated retransmission requests (ARQ) at the data link layer, with a framework that supports modular traffic control functions and quality of service (QoS) mechanisms across multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional re-transmission occurs at physical layer or IP layer, then transmission errors can be corrected, but transmission speed is reduced and vendor chip inter-operability issues arise
Solution Approach 1:
The patent moves the error correction function from traditional layers (physical or IP layer) to the data link layer, creating a new dimensional approach in the protocol stack. This allows line-rate operation at the data link layer while maintaining reliability through ARQ mechanisms, resolving the contradiction between speed and reliability by operating at an optimal layer in the protocol hierarchy
Solution Approach 2:
The patent changes the operational parameters by implementing ARQ at the data link layer with line-rate processing capabilities, rather than at slower higher layers. This parameter change in the protocol layer and processing speed enables both high transmission speed and reliable error correction simultaneously
2Reliability
If TCP mechanisms are used for flow level transmission correction, then transmission control is provided, but round-trip delays and exponential back-off reduce throughput
Solution Approach 1:
The patent implements preliminary error detection and correction at the data link layer before data reaches the TCP layer. By performing ARQ at this lower layer with direct acknowledgment mechanisms, the system corrects errors in real-time without waiting for TCP-level round-trip delays, thus maintaining throughput while ensuring reliable transmission
3Reliability
If control plane messages are transmitted separately via control plane, then message reliability is maintained, but transmission latency increases
Solution Approach 1:
The patent merges control plane message transmission with the data plane by encapsulating control messages within data plane frames. This allows control messages to ride along with data traffic and be transmitted at line rate through the data plane infrastructure, eliminating the need for separate control plane transmission paths and reducing latency while maintaining reliability through frame markings and extraction mechanisms
Data Source
AI summary
Novel tools and techniques in a telecommunication network are provided for implementing a data link layer control plane that may comply with the Ethernet standard and with sub-millisecond transmission control capabilities across multiple dis-similar technologies and bandwidth links. The framework provides a dynamic modular traffic control function insertion, removal, mapping function by having interpreter functions in the protocol agents that can map states and commands to sub-service chain functions that are configured per path and quality of service (QoS) flows. The control protocol provides high levels of resiliency and reliability by having a replicating function that transmits the same control protocol frames across multiple links simultaneously. The agents are multi-chassis capable and support hitless service impacts for administrative changes. Control plane messages may be encoded as a data plane frame and be transmitted at a high rate using the data plane.