Long-distance port expansion device based on multi-port PHY chip

By replacing the switch with a multi-port PHY chip, low-cost, low-latency long-distance data transmission is achieved, solving the problems of high cost and high latency of remote switches. It is suitable for industrial control and real-time data acquisition, and has hardware redundancy and rapid fault recovery capabilities.

CN121690876APending Publication Date: 2026-03-17KUNGAO XINXIN MICROELECTRONICS (JIANGSU) CO LTD
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Patent Information

Application Number
CN202511929198.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-19
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

In traditional network communication systems, remote switching equipment is expensive and has high latency, making it difficult to meet the needs of industrial control and real-time data acquisition.

Method used

A multi-port PHY chip is used to directly replace the switch, enabling long-distance data transmission via fiber optic cable or shielded twisted pair cable. Automatic switching for link failures is implemented on the PHY chip, creating redundant transmission paths and eliminating the need for switching chips and processor modules.

Benefits of technology

It reduces hardware costs, decreases network latency, improves equipment reliability and fault recovery speed, adapts to the limited space and low power consumption requirements of industrial sites, and is compatible with existing Ethernet terminals.

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Abstract

The invention discloses a long-distance port expansion device based on a multi-port PHY chip, and the device comprises a near-end device which is integrated with a multi-channel serial interface supporting a multi-port protocol; the remote equipment comprises at least one PHY (Physical Layer) chip, and the PHY chip is provided with an uplink multi-channel protocol interface supporting a multi-port protocol and is provided with a plurality of downlink network ports; and the multi-channel serial interface of the near-end equipment is connected with the uplink multi-channel protocol interface of the PHY chip through a long-distance transmission medium. According to the invention, the port access and data forwarding functions of a traditional switch (including a switch realized by a switch chip or a processor) are directly replaced by the far-end multi-port PHY, and the method is suitable for various network communication scenes sensitive to network cost, time delay and architecture complexity.
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