A Communication Bus with Equal Authority of Nodes

Abstract

The present application provides a communication bus with equal authority for nodes, the communication bus includes nodes 1 to n connected serially in sequence, each node has application layer interaction interface control logic, L port and R port, and the L port of each node The port is connected to the R port of the next node, and the R port of each node is connected to the L port of the previous node, wherein: the external data signal bus and the external control signal bus are connected to the L port and the L port through the application layer interactive interface control logic R port connection; application layer interaction interface control logic through the internal data signal bus, and L port L message distribution switch, L receiving data serial-to-parallel conversion, L data packet verification monitoring, L receiving data packet buffer pool, and L acquisition data control unit, L sending data packet buffer pool, L sending data control unit, L encoding verification, L sending source selection, L loop monitoring connection.

Description

technical field [0001] The present application relates to the architecture of an aeronautical airborne computer system, in particular to a communication bus with equal rights of nodes. Background technique [0002] The airborne embedded communication bus is used for data and information communication between different airborne electronic devices. Currently, the communication buses widely used on aircraft in the aviation field include RS422, ARINC429, ARINC659, AFDX, optical fiber FC, MIL1553B, SAE- AS5643, CAN, etc., among which RS422 and ARINC429 are point-to-point communication buses, and the network application scalability is poor; ARINC659 bus is a bus based on signal synchronous time-sharing table-driven communication, and communication between devices on the bus requires a global design, and neither Support devices on the bus to send messages at the same time; AFDX bus is an extended application of Ethernet technology in the aviation field with higher requirements for ...

AI Technical Summary

Problems solved by technology

[0002] The airborne embedded communication bus is used for data communication between different airborne electronic devices. Currently, the communication buses widely used in aircraft in the aviation field include RS422, ARINC429, ARINC659, AFDX, optical fiber FC, MIL1553B, SAE- AS5643, CAN, etc. Among them, the RS422 and ARINC429 buses are point-to-point communication buses, and the scalability of networking applications is poor; the ARINC659 bus is a bus based on a signal-synchronized time-sharing table-driven mechanism. Support devices on the bus to send messages at the same time; the AFDX bus is an expanded application of Ethernet technology in the aviation field with higher requirements for safety, reliability and real-time performance. Networking needs to configure switches for data routing, and the scale of its network equipment is relatively large It is not suitable for medium and small aircraft with limited space; the optical fiber FC bus supports arbitrated ring and switched network topologies, and the arbitrated ring structure supports at most one point-to-point communication circuit at a time, while the switched structure also requires the introduction of additional switch devices; MIL1553B The bus is a bus based on the command-response communication mechanism. The data communication of the entire bus network requires the centralized scheduling of the bus controller node BC. All node devices send messages at the same time; the SAE-AS5643 bus is an extended application of the IEEE1394B bus in the field of aviation and airborne. It is based on a tree branch cascade network topology. Although no switch is required, the root node is still required to realize network communication. Management, that is, node permissions are not equal, and it does not support nodes on the bus to send information at the same time; CAN bus communication uses a physical layer message preemptive communication mechanism, although the root node or bus controller node does not need to perform management on the bus, nor does it need Additional switch equipment is introduced, but it does not support nodes on the bus to send information at the same time

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