Remote PHY Auto-Negotiation via Embedded Management Channel
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Solution Overview
Problem
Remote PHY devices in communications networks lack direct or indirect connections to network management devices, preventing the exchange of management information and thus impairing network performance due to the inability to monitor and adjust their capabilities.
Innovation Solution
Implementing an independent station manager module in the remote network device to facilitate bi-directional exchange of management information with a local network management device through a communications interface, using an embedded management channel within existing traffic channels, formatted according to Auto-Negotiation routines, to enable remote PHY Auto-Negotiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a direct connection is used between network management device and network device, then management information exchange is reliable, but device complexity and connectivity requirements increase
Solution Approach 1:
The patent introduces an intermediary management information exchange mechanism that operates over existing data communication channels. The Auto-Negotiation protocol acts as a mediator, enabling management information to be transmitted through the same physical interface used for data traffic, thereby eliminating the need for separate dedicated management connections while maintaining reliable information exchange.
Solution Approach 2:
The patent makes the existing data communication interface multi-functional by enabling it to carry both data traffic and management information. The Auto-Negotiation protocol allows the physical layer interface to serve dual purposes: normal data communication and management information exchange, thus reducing overall system complexity by eliminating dedicated management channels.
2Device complexity
If an indirect connection through intermediate network elements is used, then device complexity is reduced, but management information exchange reliability deteriorates
Solution Approach 1:
The patent introduces station manager modules as intermediary entities that facilitate reliable management information exchange over indirect connections. These station managers act as trusted mediators between the network management device and remote network devices, ensuring accurate information transmission through the existing data communication infrastructure without requiring direct physical connections.
3Device complexity
If remote PHY devices lack connection to network management device, then device complexity is reduced, but network performance monitoring and adjustment capability is lost
Solution Approach 1:
The patent enables the data communication interface to perform dual functions: normal data traffic transmission and management information exchange for remote PHY devices. By making the existing interface universal, the system maintains simplified device architecture while restoring full network performance monitoring and adjustment capabilities through the Auto-Negotiation protocol.
Solution Approach 2:
The patent implements self-service capabilities where remote PHY devices can autonomously exchange management information with the network management device through the Auto-Negotiation protocol. The devices use their existing data communication interfaces to self-manage their configuration and status reporting, eliminating the need for separate dedicated management connections while maintaining full manageability.
Data Source
AI summary
A communications network includes a management device and a remote device. The remote device includes a physical layer device (PHY) coupled to a link partner. An independent station manager of the remote device provides the bi-directional exchange of management information between the PHY and a serial-to-parallel (S/P) interface connecting the remote device and the management device. A station manager of the management device provides the bi-directional exchange of management information between the S/P interface and a Media Access Controller (MAC) of the management device. The independent station manager and the station manager transmit initiation messages, formatted according to a message template of an Auto-Negotiation (AN) routine of the S/P interface reserved for customization, to reserve an embedded management channel for the transfer of management information. Management information messages, formatted according to a message template of the AN routine, are subsequently exchanged, thereby providing Auto-Negotiation of the PHY.