ODU Service Transmission via Ethernet Encapsulation
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Solution Overview
Problem
Existing optical channel data unit (ODU) service transmission systems face inefficiencies in forwarding ODU frames through Ethernet switching units, leading to potential service congestion and reduced transmission quality due to the inability to perform Ethernet switching on ODU time division multiplexing services effectively.
Innovation Solution
The implementation of an ODU service transmission apparatus comprising a first ODU service processing unit, a timeslot allocating unit, a switching output port allocating unit, an Ethernet switching unit, and a second ODU service processing unit, which encapsulates ODU frames into Ethernet frames based on a slice length and output port timeslot mapping tables, ensuring synchronized and interleaved timeslot allocation to facilitate efficient forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ODU frames are forwarded through Ethernet switching units without encapsulation, then forwarding speed is maintained, but service congestion occurs and transmission quality deteriorates
Solution Approach 1:
The patent segments the ODU service transmission process into distinct functional modules: ODU service processing units that handle encapsulation and decapsulation, an Ethernet switching unit that performs switching operations, and timeslot allocation mechanisms that manage resource distribution. This segmentation allows each component to specialize in specific tasks, improving overall system reliability while maintaining forwarding efficiency through optimized workflows.
Solution Approach 2:
The patent introduces an intermediary encapsulation layer where ODU frames are wrapped in Ethernet frames before being forwarded through the Ethernet switching unit. This intermediary structure enables the ODU service to leverage Ethernet switching capabilities while maintaining service integrity, thus improving transmission quality without sacrificing forwarding efficiency. The timeslot allocation mechanism acts as another intermediary to coordinate resource usage and prevent congestion.
2Adaptability or versatility
If ODU services are transmitted without Ethernet switching capability, then device compatibility is improved, but forwarding flexibility and efficiency are reduced
Solution Approach 1:
The patent implements a universal transmission framework where ODU frames are encapsulated in standard Ethernet frames, enabling them to be transmitted through any Ethernet switching unit regardless of vendor or model. This multi-functional approach allows the system to leverage existing Ethernet infrastructure while maintaining ODU service characteristics, thus improving device compatibility without compromising forwarding efficiency through the use of standardized protocols and interfaces.
3Adaptability or versatility
If complex service classification is performed, then service types are properly managed, but processing complexity and time increase
Solution Approach 1:
The patent performs preliminary service classification and timeslot allocation at the ingress ODU service processing unit before frames enter the Ethernet switching unit. By pre-configuring service classifications and establishing timeslot mappings in advance, the system avoids complex real-time classification operations during forwarding, thus reducing processing time while maintaining comprehensive service classification capability for managing multiple service types.
Data Source
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Figure 3
Figure 4(a)~4(c)
AI summary
The present invention relates to the field of communication transmission, and in particular, discloses an optical channel data unit service transmission apparatus and method. The switching apparatus includes a first ODU service processing unit, a timeslot allocating unit, a switching output port allocating unit, an Ethernet switching unit, and a second ODU service processing unit, and forwards an ODU service according to a timeslot mapping table and a frame period timeslot table corresponding to the ODU service, which improves compatibility of the device, ensures that service congestion does not occur on a forwarding port of the switching apparatus, reduces a delay in forwarding the service and a cost of the switching device, and improves transmission quality of a communication network.