Low Power Twisted Pair Coding Scheme for Short Reach Transceivers
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Solution Overview
Problem
Existing transceivers designed for 10 GBASE-T standards over twisted pair cables are inefficient in terms of power consumption and complexity, especially for short reach cables up to 30 meters, due to their design requiring four TWPs for bidirectional signal transmission.
Innovation Solution
Implementing a 2Tx-2Rx communication scheme where two TWPs are used for transmission and two for reception, reducing the need for echo cancellers and hybrid circuits, and utilizing multiplexing and demultiplexing to achieve a baud-rate of 1.6 GHz while maintaining compatibility with 10 GBASE-T standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If four TWPs are used for bidirectional signal transmission according to 10 GBASE-T standard, then communication compatibility is maintained, but power consumption and device complexity increase
Solution Approach 1:
The patent segments the communication function by dedicating specific twisted pairs for specific directions (Tx1, Tx2 for transmission; Rx3, Rx4 for reception). This segmentation eliminates the need for bidirectional switching and echo cancellation circuitry, reducing device complexity while maintaining 10 GBASE-T compatibility through proper signal encoding on the dedicated pairs.
Solution Approach 2:
Instead of using all four TWPs for bidirectional communication as in conventional 10 GBASE-T, the patent inverts the approach by using only two TWPs for transmission and two for reception. This inversion simplifies the transceiver design by eliminating hybrid circuits and echo cancellers, reducing complexity while achieving the same communication goal.
2Power
If four TWPs are used for bidirectional signal transmission, then signal transmission capability is maintained, but power consumption increases
Solution Approach 1:
The patent extracts and removes unnecessary power-consuming components such as hybrid circuits and echo cancellers from the transceiver design. By dedicating specific TWPs for transmission and reception, the system eliminates the need for these components, significantly reducing power consumption while maintaining full signal transmission capability at 10 Gbps.
3Adaptability or versatility
If echo cancellers and hybrid circuits are included, then bidirectional communication is enabled, but device complexity and cost increase
Solution Approach 1:
The patent segments the communication channels into dedicated transmit and receive paths. By assigning specific twisted pairs for transmission (Tx1, Tx2) and others for reception (Rx3, Rx4), the system eliminates the need for hybrid circuits and echo cancellers that would be required for bidirectional communication on the same pairs, thereby reducing circuit complexity and cost.
Data Source
AI summary
A transceiver, a communication system and an associated method thereof for reducing overall power consumption and complexity of the transceiver that operates over short reach twisted pair cables. The analog front end (AFE) of the transceiver communicates over at least one twisted pair that is configured only for transmission of data streams and communicates over at least one twisted pair that is only for reception of data streams. The transceiver includes circuitry that generates multiplexed and demultiplexed data streams for communication with the analog front end. Additionally, the transceiver utilizes at least certain portions of signal processing circuitry and AFE of a 10 GBASE-T transceiver or the like.