Ethernet Transceiver Time Slots for Alien Crosstalk Mitigation
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Solution Overview
Problem
The high cost and disruptive nature of upgrading existing 1G and slower Ethernet networks to 10G Ethernet networks due to the need for higher-rated cables like Cat6 or Cat6A, which are more expensive and require significant labor, is exacerbated by the increased alien crosstalk in legacy cables such as Cat5 and Cat5e, leading to performance degradation.
Innovation Solution
Implementing time-division multiplexing (TDM) to mitigate alien crosstalk by selectively operating transceivers in active and low power modes, reducing crosstalk through controlled transmission periods, and utilizing power-saving mechanisms like Energy Efficient Ethernet (EEE) to minimize interference between cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If 10G Ethernet is implemented over Cat5/Cat5e cables, then data transmission speed is improved, but crosstalk between cables increases causing performance degradation
Solution Approach 1:
The patent implements Time-Division Multiplexing (TDM) where transceivers transmit data in periodic time slots rather than continuously. Each transceiver is assigned specific time windows for transmission, creating periodic action patterns. This temporal separation ensures that when one cable transmits, other cables are in low-power mode, eliminating crosstalk interference while maintaining 10G Ethernet speed over legacy Cat5/Cat5e cables
2Object-affected harmful factors
If cables are upgraded to Cat6/Cat6A to support 10G Ethernet, then crosstalk is reduced, but cost and installation disruption increase
Solution Approach 1:
The patent enables existing Cat5/Cat5e cable infrastructure to serve 10G Ethernet needs through intelligent transceiver control. The system self-manages crosstalk mitigation by coordinating transmission schedules among transceivers, eliminating the need for physical cable upgrades. This allows legacy cables to provide 10G performance without replacement costs or installation disruption
3Productivity
If transceivers operate continuously in active mode, then data transmission is maintained, but power consumption increases
Solution Approach 1:
The patent implements Energy Efficient Ethernet (EEE) where transceivers alternate between active transmission modes and low-power states in periodic cycles. During assigned time slots, transceivers transmit data actively; during other periods, they enter low-power mode with reduced or no transmission. This periodic operation maintains network productivity while significantly reducing average power consumption compared to continuous active operation
Data Source
AI summary
A transceiver transmits data via a first cable among a plurality of cables in a wired communication network, and selectively operates in one of (i) an active mode for transmitting data to a link partner via the first cable and (ii) a low power mode during which the transceiver quiets transmissions to conserve power. A crosstalk detector determines that transmission of data in the first cable is causing crosstalk in one or more second cables. A controller, in response to the crosstalk detector determining that transmission of the data in the first cable is causing crosstalk in one or more second cables, controls the transceiver to operate in the low power mode during a plurality of first time periods to reduce crosstalk in the one or more second cables during the plurality of first time periods.