Transmission Link Power Control Using BER Feedback
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Solution Overview
Problem
In data center local area networks, existing methods for improving interference immunity in long-distance data transmission, such as using high-shielding cables, increase network interconnection costs and do not effectively adapt to dynamic external environment changes.
Innovation Solution
A power control method that dynamically adjusts the transmit power class value of a link based on bit error rate information and signal-to-noise ratios, using channel encoding specific to the type of link (LDPC for 10GBASE-T, 64B/66B for optical, and orthogonal frequency division multiplexing for wireless), to maintain reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-shielding cables are used to improve interference immunity, then interference immunity is improved, but network interconnection cost increases
Solution Approach 1:
The patent implements dynamic power adjustment mechanisms that allow the transmission system to adapt its power levels based on real-time channel conditions. The transmit end can dynamically switch between different power classes (e.g., from Class 0 to Class 7 in 10GBASE-T) based on detected bit error rates and signal quality, providing adaptive interference immunity without requiring expensive fixed high-shielding cables throughout the network.
Solution Approach 2:
The patent changes the power parameter of the transmission signal adaptively. By monitoring bit error rate information and signal-to-noise ratio, the system adjusts the transmit power class value to optimize performance. This parameter-based adaptation provides interference immunity on-demand rather than through permanent physical modifications like high-shielding cables, thereby reducing overall network interconnection costs.
2Reliability
If transmit power is increased to improve signal quality, then signal quality is improved, but energy consumption increases
Solution Approach 1:
The patent employs dynamic power adjustment where the transmit end continuously monitors bit error rate information and signal-to-noise ratio from the receive end. Based on these measurements, the system dynamically adjusts the transmit power class value - increasing power only when channel conditions deteriorate and decreasing power when conditions improve, thereby optimizing signal quality while minimizing energy consumption at different time instances.
Solution Approach 2:
The system changes the power parameter adaptively based on channel conditions. By implementing power class adjustment mechanisms (such as transitioning between power classes in 10GBASE-T or power levels in optical systems), the patent maintains acceptable signal quality thresholds while avoiding unnecessary high power consumption during good channel conditions, thus resolving the contradiction between signal quality and energy consumption.
3Reliability
If fixed high-power transmission is used to ensure reliability in all conditions, then reliability is improved, but adaptability to different environments deteriorates
Solution Approach 1:
The patent implements dynamic power adjustment mechanisms that allow the transmission system to adapt its power levels based on real-time channel conditions. The transmit end can dynamically switch between different power classes based on detected bit error rates and signal quality, providing adaptive interference immunity without requiring expensive fixed high-shielding cables throughout the network.
Solution Approach 2:
The system establishes a feedback loop where the receive end monitors transmission quality (bit error rate, signal-to-noise ratio) and communicates this information back to the transmit end. Based on this feedback, the transmit end adjusts its power class value to optimize performance for the current environmental conditions, thereby achieving both reliability and adaptability.
Data Source
AI summary
The application provides a power control method and apparatus. The power control method includes: obtaining, by a transmit end of a link, bit error rate information of a receive end of the link; and if the bit error rate information does not meet a predetermined condition, adjusting a transmit power class value of the transmit end. According to the power control method and apparatus of the application, the transmit power class value of the transmit end of the link can be dynamically adjusted according to a change of a system or an external environment, thereby improving interference immunity of the link and ensuring stability and reliability of data transmission.