Centralized Switch Fabric Protection Switching Control
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Solution Overview
Problem
Existing network protection mechanisms in digital transmission networks face challenges with centralized switch fabrics, as they are costly to build and complex due to the need for both client and server layer protection controllers to refer to a single centralized fabric, complicating switching processes.
Innovation Solution
A method for protection switching in a network element with a centralized switch fabric, where data signals are received and routed through client and server entities, configuring protection groups with work and protect entities, creating supplement client entities to check for faults and raise alarms to respective protection controllers, utilizing a centralized processor, memory, client and server layer protection controllers, and a network protocol module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a centralized switch fabric is used, then cost is reduced compared to distributed switch fabric, but device complexity increases due to both client and server layer protection controllers referring to the same centralized fabric
Solution Approach 1:
The invention segments the protection switching control into two independent layers: client layer protection controllers and server layer protection controllers. Each layer operates autonomously with its own decision-making logic, eliminating the complexity of coordinated control while maintaining centralized fabric architecture. This segmentation allows independent optimization of each control layer without increasing overall system complexity.
Solution Approach 2:
The invention introduces an intermediary mechanism where the centralized switch fabric acts as a shared resource pool that both client and server layers can independently access. The fabric itself becomes the mediator that handles switching decisions locally based on control signals from either layer, eliminating the need for complex inter-layer coordination while maintaining cost-effectiveness.
2Ease of operation
If distributed switch fabric is used, then protection switching is simpler to implement with independent control at each layer, but cost increases
Solution Approach 1:
The invention merges the advantages of distributed control independence with centralized fabric cost-effectiveness. By allowing both client and server layer protection controllers to independently manage their respective switching decisions on the same centralized fabric, the system achieves operational simplicity similar to distributed systems while maintaining the cost benefits of centralized architecture.
3Ease of manufacture
If both client and server layer protection controllers refer to the same centralized fabric, then cost is reduced, but switching process complexity increases
Solution Approach 1:
The invention implements preliminary action by pre-configuring protection groups and establishing independent control logic at both client and server layers before switching events occur. This pre-establishment of control mechanisms allows immediate, autonomous response to failures without complex real-time coordination, maintaining switching efficiency while using centralized fabric.
Solution Approach 2:
The invention introduces dynamic switching capabilities where the centralized fabric can adaptively respond to control signals from either client or server layers based on real-time network conditions. This dynamic behavior allows the system to optimize switching paths on-the-fly without predetermined rigid configurations, maintaining high productivity while using cost-effective centralized architecture.
Data Source
AI summary
A method and system protects switching in a network element. At least one data signal at the client entity is received, wherein the signal flow through server entity via the client entity. A configuring protection group on at least one client entity is served by at least two server entity, wherein the protection group includes at least one work entity and at least one protect entity. A plurality of supplement client entities of client entity is created such that at least one of the supplement client entity flows over one server entity and checking the entities for a fault to raise alarm to their respective controllers. The controller includes at least one server layer protection controller and at least one client layer protection controller.