Optical Network Resource Reservation Timing
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Solution Overview
Problem
Current resource reservation techniques in optical telecommunications networks are poorly suited for dynamic traffic with short and frequent reservation periods, leading to unnecessary resource occupation and limited reservation speed due to the resource reservation time being greater than the data transfer time, especially when data propagation time is close to signaling time.
Innovation Solution
A method for delayed resource reservation that calculates the start and end times of resource reservation at each node by obtaining and updating transfer time information, allowing optimal resource usage and implementing the 'Just Enough Time' principle, which includes obtaining transfer time information and using it to determine the resource reservation start date, thereby avoiding unnecessary resource occupation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource reservation is performed before data transfer using conventional signaling protocols, then connection establishment is guaranteed, but resource occupation time becomes longer than necessary
Solution Approach 1:
The patent applies preliminary action by performing resource reservation in advance before data transfer, but optimizes the timing by calculating the exact reservation start time based on data propagation time. The source node determines when resources should be reserved at each intermediate node by subtracting the cumulative data propagation time from the desired connection start time, ensuring resources are ready exactly when needed without premature occupation.
Solution Approach 2:
The patent uses feedback by having intermediate nodes report their data propagation times to the source node. The source node receives this feedback information about the actual time it takes for data to traverse each link, then uses this feedback to calculate precise reservation timing, adjusting the reservation start time at each node based on the measured propagation characteristics of the network path.
2Device complexity
If resource reservation is performed with fixed timing, then simplicity is maintained, but adaptability to varying data transfer durations is reduced
Solution Approach 1:
The patent applies dynamics by making the resource reservation timing adaptive rather than fixed. Each intermediate node reports its data propagation time, and the source node dynamically calculates the reservation start time for each node based on these varying propagation times and the desired connection start time. This allows the system to adapt to different network conditions, traffic patterns, and path characteristics while maintaining a relatively simple overall mechanism.
Data Source
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AI summary
The invention relates to a method for processing a delayed resource reservation request in an optical telecommunication network for transferring data between a source device and a destination device, the control plane being different from the transfer plane, characterized in that, upon a node device of the network receiving the resource reservation request sent from the source device to the destination device via a path including at least one node device, said request containing at least one first parameter relating to the start of the connection at the source device, said method includes the following steps: obtaining information relating to a signal transfer time via said path up to an upstream node device; updating said information by adding a signal transfer time at said intermediate equipment; and calculating a date (tcn) for the start of the resource reservation at the node device using the value of said first received parameter and said information.