OTN Service Subunit Data Division for Crossing Capacity
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Solution Overview
Problem
The existing Optical Transport Network (OTN) equipment faces limitations in crossing capacity due to the number of high-speed serial buses in a single Field Programmable Gate Array (FPGA), restricting expansion and service capacity.
Innovation Solution
The method involves dividing data mapped to backplane buses into parts and recombining them through an interconnected bus between service subunits, allowing data to be sent to a crossing unit, thereby achieving non-blocking capacity expansion without increasing the number of crossing units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single FPGA is used for electric-layer crossing scheduling, then device complexity is reduced, but crossing capacity is limited by the number of high-speed serial buses
Solution Approach 1:
The service unit is divided into multiple service subunits (first service subunit, second service subunit, etc.), each capable of independently processing data. This segmentation allows the system to achieve greater crossing capacity by distributing data processing across multiple subunits without requiring a single complex FPGA to handle all connections.
2Productivity
If multiple service subunits are used to increase crossing capacity, then service capacity expands, but system cost increases due to additional hardware
Solution Approach 1:
Multiple service subunits share common resources including the backplane buses and the crossing unit. The first service subunit and second service subunit both access the same N backplane buses and share the crossing unit for data transmission, reducing the need for duplicate hardware and lowering system costs while maintaining expanded service capacity.
Solution Approach 2:
The crossing unit serves multiple service subunits simultaneously, acting as a universal data transmission resource. The same crossing unit handles data from both the first service subunit and second service subunit, making it multi-functional and reducing the need for dedicated crossing units for each service subunit.
3Quantity of substance
If data is divided and recombined through interconnected bus, then crossing capacity is enhanced, but data processing complexity increases
Solution Approach 1:
Data is divided into parts (first part, second part) at the service subunit level before being sent to the crossing unit. This preliminary division is performed in an organized manner with clear mapping relationships, making the subsequent recombination process more manageable and reducing overall processing complexity.
Solution Approach 2:
The interconnected bus acts as an intermediary between service subunits and the crossing unit, facilitating structured data exchange. The bus provides a standardized interface for data transmission, simplifying the complexity of direct point-to-point connections between multiple service subunits and the crossing unit.
Data Source
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AI summary
The disclosure provides a crossing capacity processing method for Optical Transport Network (OTN) equipment and the OTN equipment, wherein the OTN equipment comprises a service unit and a crossing unit; the service unit comprises a first service subunit and a second service subunit. The method comprises the following steps: the first service subunit divides data T1 which is mapped to T timeslots of N/2 lower backplane buses of the first service subunit into two parts; the second service subunit divides data T2 which is mapped to the T timeslots of the N/2 lower backplane buses of the second service subunit into two parts; the first service subunit and the second service subunit exchange and recombine the data, and send recombined data to the crossing unit. The disclosure reduces the system cost and improves the utilization ratio of system.