Optical Switching Hybrid Traffic Segmentation
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Solution Overview
Problem
Current optical data switching methods face inefficiencies in resource utilization and reliability, particularly in packet switching, which struggles to ensure timely delivery and low packet loss for time-sensitive traffic like video-conferencing, while circuit switching is wasteful with reserved bandwidth.
Innovation Solution
A hybrid approach that processes optical data packets by determining whether they are guaranteed-service or statistically-multiplexed, prioritizing guaranteed-service packets and efficiently inserting statistically-multiplexed packets into gaps based on their lengths, using a selection process to optimize bandwidth usage and maintain service guarantees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If packet switching is used to flexibly utilize bandwidth, then resource efficiency is improved, but reliability and timely delivery for time-sensitive traffic deteriorate
Solution Approach 1:
The patent segments traffic into two distinct classes: Guaranteed Service Traffic (GST) and Statistically-Multiplexed (SM) traffic. GST packets are handled with circuit-switching guarantees for reliable timely delivery, while SM packets utilize packet-switching flexibility. This segmentation allows the system to simultaneously achieve reliability for time-sensitive traffic and resource efficiency for other traffic.
Solution Approach 2:
The patent implements dynamic resource allocation where the network can adaptively switch between circuit-switching and packet-switching modes based on traffic requirements. The hybrid approach dynamically reserves resources for GST while allowing statistical multiplexing for SM traffic, enabling the system to optimize both reliability and resource efficiency under different operating conditions.
2Reliability
If circuit switching is used to ensure reliable data transport, then reliability is improved, but bandwidth resource utilization deteriorates
Solution Approach 1:
The patent applies different quality characteristics to different traffic types within the same network infrastructure. GST traffic receives circuit-switching treatment with guaranteed bandwidth and reliable delivery, while SM traffic receives packet-switching treatment with best-effort delivery. This local differentiation of service quality allows the network to achieve high reliability where needed without sacrificing overall resource utilization.
Solution Approach 2:
The patent creates a universal hybrid switching architecture that can handle both circuit-switched and packet-switched traffic through the same network infrastructure. The system universally supports both GST and SM traffic types, allowing flexible resource allocation where circuit-switching guarantees are provided only when and where needed, rather than reserving bandwidth across the entire network.
3Reliability
If guaranteed-service packets are prioritized with strict timing, then service reliability is improved, but bandwidth flexibility for other traffic deteriorates
Solution Approach 1:
The patent segments the network resource allocation into guaranteed portions for GST and flexible portions for SM traffic. By separating traffic handling into distinct queues and processing paths, the system can guarantee service levels for time-sensitive traffic while maintaining bandwidth flexibility for other traffic through statistical multiplexing in the SM queue.
Data Source
AI summary
A network node comprises an optical input, an optical output, a random-access queue and processing system. It receives a data packet, at the optical input and determines whether to process it as a guaranteed-service packet or as a statistically-multiplexed packet. A guaranteed-service packet is output within a predetermined maximum time of receipt, optionally within a data container comprising container control information. A statistically-multiplexed packet is queued. The node determines a set of statistically-multiplexed packets that would fit a gap between two guaranteed-service packets; selects one of the packets; and outputs it between the two guaranteed-service packets.