FPGA Transceiver Virtualization via Dynamic Routing

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Solution Overview

Problem

In modern cloud-based data centers, the conventional fixed allocation of transceivers in FPGAs limits resource sharing and performance due to temporary inactivity of partial reconfiguration slots and varying network conditions, leading to inefficient use of expensive transceiver resources.

Innovation Solution

A dedicated partial reconfiguration slot with transceiver rerouting and adaptation logic, transceiver sharing block, full transceiver interconnections, and dedicated direct interconnections enables transceiver virtualization, allowing dynamic routing and load-balancing of data traffic flows between partial reconfiguration slots and transceivers based on network controller requests.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If fixed allocation of transceivers is used in FPGAs, then transceiver resources are assigned to partial reconfiguration slots, but resource sharing is limited and performance deteriorates due to temporary inactivity and varying network conditions

Engineering Contradiction:

Improveresource sharing capabilityVSAvoidtransceiver utilization efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The patent implements dynamic transceiver allocation by introducing a routing configuration mechanism that can reassign transceivers to different partial reconfiguration slots based on real-time network conditions and slot activity status. The routing configuration is updated dynamically when slots become inactive or when network demands change, enabling flexible resource sharing and improving transceiver utilization efficiency.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the allocation parameters of transceivers from fixed to dynamic based on slot inactivity thresholds and network conditions. When a partial reconfiguration slot becomes inactive for a predetermined period, its associated transceiver is reassigned to another active slot, thereby optimizing resource utilization and resolving the contradiction between adaptability and productivity.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If fixed allocation is used, then transceiver assignment is simple, but load-balancing capability is insufficient under varying network conditions

Engineering Contradiction:

Improvetransceiver assignment simplicityVSAvoidload-balancing performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent introduces a feedback mechanism where the network controller monitors slot inactivity and network conditions, then adjusts transceiver routing configurations accordingly. This feedback loop enables the system to maintain simple initial assignment while dynamically improving load-balancing performance based on real-time observations of slot usage patterns and network demands.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary assignment of transceivers to slots during configuration, then prepares for dynamic adjustments by continuously monitoring slot status. When inactivity thresholds are met or network conditions change, pre-configured routing alternatives are activated, maintaining operational simplicity while improving reliability through proactive load balancing.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If dynamic routing and load-balancing are implemented, then resource usage is optimized, but device complexity increases due to additional routing configuration mechanisms

Engineering Contradiction:

Improvetransceiver utilization efficiencyVSAvoidrouting configuration structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent introduces a routing configuration mechanism as an intermediary component between the transceivers and partial reconfiguration slots. This mediator handles the complexity of dynamic routing and load-balancing calculations, allowing the core FPGA functionality to remain relatively simple while achieving optimized resource utilization through the intermediary's intelligent routing decisions.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The system segments the routing function into separate manageable components: a routing configuration manager that handles high-level allocation decisions, and slot-specific routing logic that manages individual transceiver assignments. This segmentation reduces overall system complexity by dividing the complex dynamic routing task into smaller, more manageable functions that can be implemented and maintained more easily.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11979769B2Virtualization of transceivers for multi-tenant programmable network-based devices

Publication Date: 2024.05.07 NOKIA SOLUTIONS & NETWORKS OY

AI summary

A programmable device includes a plurality of first partial reconfiguration slots, a plurality of transceivers and a second partial reconfiguration slot. The plurality of first partial reconfiguration slots are configured to execute one or more applications or network functions. The second partial reconfiguration slot is configured to route data traffic flows between the plurality of first partial reconfiguration slots and the plurality of transceivers.