G.hn Auto Pairing Method for Crosstalk Reduction in Access Networks
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Solution Overview
Problem
Conventional access networks face challenges in providing gigabit rate Ethernet services over phone lines due to crosstalk issues caused by high frequencies, especially in older buildings where installing additional lines is difficult or impractical, leading to communication errors and incorrect line identification.
Innovation Solution
A GIGA wire automatic pairing method using the G.hn specification, where domain masters and end-points are connected via a bundle cable, with protocol-based MAC authentication and synchronized signal frequencies between 20 Hz to 60 Hz to reduce crosstalk, and a seed value is pre-configured at the domain master and acquired by the end-point during the pairing process to prevent incorrect line identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If G.hn specification is applied to provide gigabit rate service over phone lines, then bandwidth is increased from 100 Mbps to 1 Gbps, but crosstalk interference occurs due to high frequency signals
Solution Approach 1:
The patent introduces a bundle cable as an intermediary structure that groups multiple phone lines together with shielding. This bundle cable acts as a mediator between the high-frequency G.hn signals and the external environment, reducing crosstalk interference from adjacent lines while allowing gigabit rate service to operate over the existing phone line infrastructure
2Power
If additional phone lines are installed to provide gigabit rate service, then bandwidth is increased, but installation becomes cumbersome and requires resident consent
Solution Approach 1:
The patent makes the existing phone line infrastructure universal by applying G.hn specification to enable gigabit rate service over conventional phone lines without requiring new installations. The same phone lines that previously provided only voice service or low-speed data can now carry high-speed data, eliminating the need for additional line installations and reducing bureaucratic hurdles
3Power
If high frequency signals are used for gigabit rate service, then bandwidth is increased, but line signal attenuation and distortion occur due to interference
Solution Approach 1:
The bundle cable structure serves as a protective intermediary that shields individual phone lines from external electromagnetic interference. By grouping lines together with proper shielding and twisting, the bundle cable reduces signal attenuation and distortion caused by crosstalk from adjacent lines, thereby improving signal quality while maintaining gigabit rate capability
Solution Approach 2:
The patent employs signal synchronization techniques where periodic training sequences and equalization signals are transmitted to adaptively compensate for channel effects. This periodic action allows the system to continuously adjust and optimize signal quality despite high-frequency interference, maintaining reliable gigabit rate service
4Ease of operation
If MAC authentication is performed without proper line identification, then pairing process is simplified, but communication errors occur due to incorrect line identification
Solution Approach 1:
The patent uses distinctive identification markers (analogous to color changes) for each line, such as unique voltage levels or signal patterns that allow the authentication system to clearly distinguish between different physical lines. This visual/electrical differentiation ensures that MAC authentication is performed on the correct line, preventing communication errors while maintaining an automated pairing process
Data Source
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AI summary
The present invention relates to a method for GIGA wire auto pairing, in more details the method for performing auto pairing between a domain master and end-point in an access network forming a G.hn domain including access network multiplexer (GAM) in which multiple ports are functioning as domain masters, a terminal (GNT) which includes an end-point forming a G.hn domain with the domain master, and a bundle cable connecting the domain master with the end-point. The auto pairing process is performed by activating ports and starting opening-up, and linking the domain master and the end-point using a seed value, then if the link is set up, automatically registering MAC address of the end-point using previously saved MAC address of the end-point. And thus the domain master is connected only with the registered end-point in the relink process. According to the present invention, it is unlikely to confuse different lines as the same lines.