Virtual DPU Architecture for Crosstalk Cancellation
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Solution Overview
Problem
Legacy wireline systems face challenges in coping with new network architectures for G.fast and MGfast deployment scenarios due to the high complexity and power consumption of distribution point units (DPUs), which require high-density deployment and lack effective solutions for crosstalk cancellation between DPUs due to lack of direct connections and latency issues.
Innovation Solution
A system and method for virtualizing signal processing tasks in wireline networks, where signal processing tasks are split between DPUs, central office management (COM) circuits, and cloud management (CM) circuits, allowing for the majority of heavy processing to occur at the central office or in the cloud, simplifying DPU operations, reducing power consumption, and enabling crosstalk cancellation between DPUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If distribution point units (DPUs) are deployed with high density to achieve multi-Gigabit connections over copper wire, then data transmission capability is improved, but device complexity and power consumption increase
Solution Approach 1:
The patent segments the DPU functionality into two parts: a simplified DPU at the customer premises that performs only basic signal processing, and a remote unit hosted in the cloud that performs complex signal processing tasks including cross-talk cancellation. This segmentation reduces the complexity and power consumption of the DPU while maintaining high data transmission capability through the coordinated operation of both units.
Solution Approach 2:
The patent introduces a remote unit as an intermediary between the simplified DPU and the network operations center. This remote unit handles complex signal processing tasks that would otherwise require high-density DPU deployment, thereby reducing device complexity while maintaining productivity through the intermediary's processing capabilities.
2Productivity
If distribution point units (DPUs) are deployed with high density to achieve multi-Gigabit connections over copper wire, then data transmission capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the power-intensive signal processing tasks from the DPU and relocates them to a remote unit in the cloud. The DPU performs only lightweight signal processing, dramatically reducing its power consumption while maintaining multi-Gigabit data transmission capability through the distributed architecture.
Solution Approach 2:
The remote unit performs signal processing tasks autonomously without requiring high-power DPUs at each customer premises. This self-service approach to signal processing reduces the power consumption of customer premises equipment while maintaining high data transmission capability through the remote unit's processing capabilities.
3Adaptability or versatility
If distribution point units (DPUs) are deployed without direct connections between them, then deployment flexibility is improved, but crosstalk cancellation capability deteriorates
Solution Approach 1:
The patent introduces a centralized cross-talk cancellation unit as an intermediary that receives signals from multiple DPUs and performs cross-talk cancellation processing. This mediator enables effective cross-talk cancellation even though DPUs are not directly connected, maintaining reliability while preserving deployment flexibility.
Solution Approach 2:
The patent implements a feedback mechanism where the remote unit receives uplink signals from DPUs, performs cross-talk cancellation based on channel state information, and sends processed signals back to the network. This feedback loop enables effective cross-talk cancellation without requiring direct DPU connections, maintaining both deployment flexibility and cancellation capability.
Data Source
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AI summary
A distribution point unit (DPU) circuit associated with a communication system configured to be coupled to a central office management (COM) circuit over fiber, is disclosed. The DPU circuit comprises one or more processors configured to provide one or more upstream data signals in digital domain or analog domain, to the COM circuit over fiber. In some embodiments, the one or more upstream data signals are associated with one or more modem circuits respectively coupled to one or more lines associated with the DPU circuit. In some embodiments, the one or more processors is further configured to receive one or more downstream data signals from the COM circuit over fiber, in digital domain or analog domain. In some embodiments, the one or more downstream data signals are to be provided to the one or more modem circuits respectively coupled to the one or more lines associated with the DPU circuit.