Master-Slave PDU Arbitration for Network Relay
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Solution Overview
Problem
Conventional network Power Distribution Units (PDUs) face increased complexity and cost when numerous units need to connect to an external network for remote monitoring, requiring multiple IP addresses and complex system arrangements.
Innovation Solution
Implementing a master-slave architecture in power distribution systems, where power distribution units can arbitrate to switch between master and slave modes, allowing indirect network connection without external cables and reducing IP address requirements, enabling efficient relay communication and failover services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each network PDU is connected to the external network for remote monitoring, then remote monitoring capability is improved, but system complexity increases substantially
Solution Approach 1:
Multiple network PDUs are merged into a master-slave architecture where only the master PDU connects to the external network. The slave PDUs relay monitoring data through the master PDU, combining multiple individual connections into a single external connection while maintaining remote monitoring capability for all PDUs.
Solution Approach 2:
The master PDU acts as an intermediary between the external network and multiple slave PDUs. It receives monitoring commands from the external network and relays them to slave PDUs, while also collecting status information from slaves and forwarding to the external network, eliminating the need for direct external connections to each PDU.
2Reliability
If numerous network PDUs connect to the external network, then remote monitoring coverage is improved, but IP address consumption increases
Solution Approach 1:
Multiple PDU units are merged into a hierarchical master-slave structure where only the master PDU occupies an external network IP address. All slave PDUs communicate through the master PDU, eliminating the need for each PDU to have a dedicated external IP address while maintaining comprehensive monitoring coverage.
3Adaptability or versatility
If master-node arbitrating process is implemented, then network-connecting relay service is improved, but control process complexity increases
Solution Approach 1:
The master-node arbitrating process is implemented autonomously by the PDUs themselves without external intervention. Each PDU independently executes the arbitration algorithm to determine its role, and the system automatically handles failover when the master fails, eliminating the need for external control complexity while providing adaptive relay service.
Solution Approach 2:
The master-node arbitrating process is executed in advance before actual network operations begin. PDUs pre-determine their master or slave roles through arbitration, and the system is prepared with failover mechanisms, so when the master fails, the slave can quickly take over without complex real-time control decisions.
Data Source
AI summary
A power distribution system capable of network-connecting relay is provided. Power distribution units of the power distribution system execute a master-node-arbitrating process to generate an arbitration result, and respectively switch to a master node mode for being a master node or a slave node mode for being a slave node according to the arbitration result. When being the master node, a power distribution unit receives a monitor command from a remote management device via an external network, and transfers it to the corresponded slave node(s). When being the slave node, a power distribution unit executes the monitor command received from the master node. Therefore, the complexity of building system and the cost of building system can be effectively reduced, and network-connecting relay service can be provided.