Master Node Service Processing in Optical Burst Transport Networks
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Solution Overview
Problem
In Optical Burst Transport Networks (OBTN), resource conflicts arise when a service crosses a master node, affecting resource assignment and transmission in subsequent ring periods, which existing solutions have not adequately addressed.
Innovation Solution
A method and device for processing a service crossing a master node, where the master node selects a processing strategy within the Dynamic Bandwidth Assignment (DBA) period to either retain or eliminate the service, grouping data frames into frame sets to manage bandwidth and resolve conflicts, using retention or elimination strategies based on the ratio of DBA to frame periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a service crossing the master node is allowed to use a time slot in the current ring period, then the service can be transmitted, but it causes resource conflicts in the next ring period where the same time slot cannot be used by other services
Solution Approach 1:
The patent segments the time slot resources into two distinct parts: occupied time slots (for services crossing the master node) and unoccupied time slots (for other services). This segmentation is achieved by marking the status of each time slot in the bandwidth map, allowing the system to differentiate between time slots that are currently in use versus those available for assignment, thereby preventing resource conflicts in the next ring period
Solution Approach 2:
The patent performs preliminary marking of time slot status in the current bandwidth map before generating the next bandwidth map. By预先 marking which time slots are occupied by services crossing the master node, the system proactively prevents resource conflicts before they occur in the next ring period, ensuring correct resource assignment from the outset
2Device complexity
If the DBA period is set to be an integral multiple of the frame period, then the scheduling complexity is reduced, but the dynamic response performance of the network deteriorates
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms for the DBA period and frame period relationships. Instead of fixing the DBA period as a rigid integral multiple of the frame period, the system can dynamically adjust the timing parameters based on network conditions and service requirements, allowing optimal balance between scheduling complexity and dynamic response performance under different operating scenarios
Data Source
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AI summary
Provided are a method and device for processing a service crossing the master node, which relate to the communications field, and solve a problem of a resource conflict caused by the service crossing the master node in the OBTN. The method comprises: when assigning a bandwidth for a service requested by each node within the present DBA period, a master node selects a processing strategy; the master node eliminates, according to the selected processing strategy, a resource conflict caused by the service crossing the master node, and assigns a bandwidth to the service requested by each node. The technical solution provided by the present disclosure is applicable to the OBTN, thereby implementing highly reliable OBTN resource scheduling.