SpaceWire Traffic Supervision via Logical Address Routing
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Solution Overview
Problem
Current traffic supervision solutions in SpaceWire communication networks require multiple supervision equipment and involve cumbersome disconnection and reconnection of flight equipment, which can damage connectors and is inefficient, especially during integration and test phases of satellite systems.
Innovation Solution
Implementing a communication network architecture that uses routing techniques based on multiple logical addresses, allowing a single test equipment to acquire all network traffic by adding a specific address to data packets and updating router routing tables, enabling efficient supervision and recording of network traffic without modifying the packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple supervision equipment are inserted between each node of the network, then traffic supervision coverage is improved, but device complexity and intervention difficulty increase
Solution Approach 1:
The single supervision equipment performs multiple functions by receiving packets from multiple routers through different ports, filtering them based on destination addresses, and recording all network traffic. This eliminates the need for separate supervision equipment at each node while maintaining comprehensive monitoring coverage.
Solution Approach 2:
The supervision equipment acts as an intermediary that collects traffic from multiple routers indirectly through the routing table mechanism, rather than requiring direct connection to each node. The routing tables serve as the mediator that directs packets to the supervision equipment for analysis.
2Measurement precision
If supervision equipment is inserted between each node, then traffic monitoring capability is improved, but the disconnection and reconnection operations become more frequent and damaging
Solution Approach 1:
The routing tables serve as a virtual intermediary that enables traffic redirection without physical disconnection. By updating routing table entries, the system can direct traffic to the supervision equipment through existing connections, eliminating the need for physical connector manipulation and maintaining connection reliability.
Solution Approach 2:
The system changes the logical parameters (routing table entries) rather than physical connections to achieve traffic supervision. By modifying routing table configurations, traffic paths are redirected without touching the physical connectors, thus protecting them from damage.
3Device complexity
If a single supervision equipment is used to acquire all network traffic, then device complexity is reduced, but routing table updating operations become more complex
Solution Approach 1:
The single supervision equipment is configured to handle multiple routing table updates and packet filtering operations through a unified design. The equipment processes packets from different routers by filtering on destination addresses, consolidating what would otherwise require multiple separate supervision devices into one multi-functional unit.
4Measurement precision
If multiple supervision equipment are deployed, then overall traffic picture is improved, but intervention time and operational difficulty increase
Solution Approach 1:
The system merges the functions of multiple supervision equipment into a single device that receives packets from multiple routers. By consolidating traffic collection and analysis functions, the system reduces intervention time while maintaining comprehensive traffic visibility through the unified supervision equipment.
Data Source
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AI summary
A communication network comprising nodes (110, 121 to 126) identified by addresses and exchanging data in packets, and at least one router (131 and 132), the communication network being characterized in that: • said nodes are configured to append a specific address to the beginning of each transmitted data packet, • said communication network allows at least one data monitoring device (210) to be connected to one of the routers, • the routers are configured to forward data packets containing a specific address to said monitoring device or destination node based on the specific address, and • the monitoring device is configured to return received data packets to the router to which it is connected via a port, without modification. Associated monitoring equipment and method.