OTN Device Packet Service Mapping via Board Port Identification
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Solution Overview
Problem
Current methods for mapping packet services onto Optical Transport Networks (OTNs) are limited by the granularity of packet service size and cross-connect scheduling direction, leading to inflexible bandwidth management and restricted scheduling capabilities.
Innovation Solution
The proposed solution involves an OTN device with a tributary board, cross-connect board, and line board, where packet service messages are processed by identifying board and port numbers through table lookup, allowing for flexible cross-connect scheduling and sharing of ODU timeslots between tributary boards and line boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If board-level EOO architecture is used for mapping packet service onto OTN, then multi-service OTN platform support is achieved, but cross-connect scheduling direction is limited and bandwidth management flexibility is reduced
Solution Approach 1:
The patent segments the OTN device into multiple independent line boards, each capable of performing packet service mapping and ODU timeslot allocation. This segmentation allows each line board to independently handle cross-connect scheduling, thereby achieving flexible bandwidth management and multi-directional scheduling while maintaining multi-service platform support.
Solution Approach 2:
The patent introduces a new dimension of control by allowing cross-connect scheduling not only at the board level but also at the line board level. This dimensional expansion enables finer-grained control over packet service mapping and ODU timeslot allocation, resolving the limitation of fixed scheduling directions in traditional board-level EOO architecture.
2Reliability
If minimum timeslot granularity of 1.25 Gbps is used in OTN device, then TDM technology compatibility is maintained, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic bandwidth allocation by allowing line boards to flexibly allocate ODU timeslots based on actual packet service requirements. Instead of fixed 1.25 Gbps granularity, the system can dynamically adjust timeslot allocation and combine multiple timeslots to match variable bandwidth demands, thereby improving utilization efficiency while maintaining TDM compatibility through the underlying OTN framework.
Solution Approach 2:
The patent changes the effective timeslot granularity parameter by allowing combination of multiple ODU timeslots to form larger bandwidth units. This parameter transformation enables the system to adapt to different bandwidth requirements without being constrained by the fixed 1.25 Gbps minimum granularity, thus improving bandwidth utilization while preserving TDM technology compatibility.
Data Source
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AI summary
Embodiments of the present invention disclose a method for mapping a packet service onto an optical transport network, including: receiving a packet service message from an access side, and identifying the packet service message by using a first board number of a first line board in which a first egress is located and a first port number of the first egress; sending the packet service message to the first line board corresponding to the first board number; and encapsulating the packet service message that is sent to the first line board, mapping an encapsulated packet service message onto a first optical channel data unit ODU corresponding to the first port number, and sending the first ODU by using the first egress. According to the foregoing technical solutions, cross-connect scheduling of any bandwidth in any direction is implemented based on a packet service, and packet services on different tributary boards share different ODU timeslot or a same ODU timeslot on a same line board.