Network Communication Apparatus Single Twisted Pair Auto Negotiation
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Solution Overview
Problem
Ethernet auto negotiation fails when connecting electronic devices with only one twisted pair, preventing communication between them.
Innovation Solution
A network communication method using a time division communication mechanism for single-way communication to perform an auto negotiation process, exchanging communication capability and acknowledgement packets between devices when an acknowledgement is not received, allowing for communication path determination and format establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Ethernet auto negotiation mechanism is used, then communication can be established between devices with two twisted pairs, but communication fails when only one twisted pair is available
Solution Approach 1:
The patent implements dynamic communication mode switching between full-duplex (two twisted pairs) and half-duplex (one twisted pair) modes. The system automatically detects the available twisted pair configuration and adapts the negotiation mechanism accordingly, enabling reliable communication establishment regardless of whether one or two twisted pairs are present.
Solution Approach 2:
The patent changes the communication parameters by introducing time-division multiplexing for packet exchange when only one twisted pair is available. Instead of requiring simultaneous bidirectional communication, the system alternates transmission and reception time slots, modifying the negotiation protocol to accommodate the reduced physical medium while maintaining communication reliability.
2Adaptability or versatility
If time division communication mechanism is implemented for single-way communication, then auto negotiation can be performed with single twisted pair, but communication time period is extended
Solution Approach 1:
The patent employs periodic time-division multiplexing where transmission and reception occur in alternating time slots. This structured periodic action allows both devices to exchange negotiation packets sequentially over a single twisted pair, achieving adaptability to single-pair connections while keeping the time extension predictable and manageable through defined time slot allocations.
3Reliability
If acknowledgement packet reception is required for negotiation, then communication reliability is ensured, but communication fails when acknowledgement cannot be transmitted back
Solution Approach 1:
The system dynamically adjusts the acknowledgement mechanism based on the detected twisted pair configuration. When two twisted pairs are available, traditional simultaneous bidirectional acknowledgement is used. When only one twisted pair is detected, the system switches to sequential time-division acknowledgement where devices take turns transmitting and receiving, maintaining negotiation reliability while accommodating unidirectional transmission constraints.
Data Source
AI summary
A network communication method used in a network communication apparatus is provided that includes the steps outlined below. An external network communication apparatus is electrically coupled through a communication path. A communication capability packet is transmitted to the external network communication apparatus. Whether an acknowledgement packet from the external network communication apparatus is received through the communication path is determined. When the acknowledgement packet is not received, a single direction communication is performed within any single time period by using a time division communication mechanism such that an auto negotiation process is performed by exchanging the communication capability packet and the acknowledgement packet of both of the network communication apparatus and the external network communication apparatus.