Optical Burst Switching Duplicate Transmission Priority
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Solution Overview
Problem
Optical burst switching networks face significant burst loss due to contention for optical resources, leading to blocking issues, and existing methods to alleviate this, such as duplicate transmission, increase traffic and blocking probability while not fully utilizing statistical multiplexing advantages.
Innovation Solution
The method involves transmitting a duplicate optical burst with a lower priority than the original, allowing the destination node to process and discard the duplicate if it arrives after the original, thereby preventing blocking without increasing overall traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If duplicate optical burst transmission is implemented to reduce burst loss, then reliability is improved, but traffic volume increases causing higher blocking probability
Solution Approach 1:
The patent changes the priority parameter of duplicate bursts relative to original bursts. By assigning lower priority to duplicates, the system allows originals to be transmitted first, reducing burst loss without requiring equal bandwidth allocation for all duplicates. This parameter change resolves the contradiction by optimizing resource allocation based on burst type.
Solution Approach 2:
The patent implements partial action by transmitting duplicates only when originals are blocked or lost. The destination node discards duplicate bursts if the original arrives successfully, and processes duplicates only when needed. This partial transmission approach reduces overall traffic volume while maintaining reliability improvements.
2Reliability
If duplicate bursts are transmitted with equal priority to original bursts, then reliability is improved, but device complexity increases due to complex signaling and processing
Solution Approach 1:
The patent simplifies device complexity by changing the priority parameter assignment - duplicates are given lower priority than originals. This eliminates the need for complex bidirectional signaling and reservation protocols, as the priority differentiation automatically manages resource allocation without requiring additional control mechanisms.
3Ease of operation
If optical bursts are transmitted without priority differentiation, then ease of operation is improved, but productivity decreases due to blocking and retransmission delays
Solution Approach 1:
The patent introduces priority differentiation as a simple parameter change - originals receive high priority while duplicates receive low priority. This maintains ease of operation by using a straightforward priority-based queuing mechanism, while simultaneously improving productivity by ensuring originals are transmitted first, reducing blocking and retransmission delays.
Data Source
AI summary
An optical burst switching (OBS) system and a method using duplicate optical burst transmission is provided. In accordance with the present invention, optical bursts do not have the same priority when the duplicate optical bursts are transmitted in an OBS network so that a burst loss rate due to blocking can be reduced. Optical bursts do not have the same priority when the duplicate optical bursts are transmitted in an OBS network, so that a burst loss rate due to the blocking can be reduced. After an optical burst control packet is transmitted on a signal channel using a unidirectional reservation manner in the OBS, a problem such as optical burst loss due to the blocking can be prevented even when the optical burst is transmitted on a data channel after an offset time is elapsed without any response messages.