Multi-Master Arbitration Method in Dynamically Reconfigurable High Speed ​​Serial Bus

Abstract

The invention discloses a multi-master arbitration method in a dynamic reconfigurable high-rate serial bus. The multi-master arbitration method is characterized in that the multi-master arbitration method comprises the following steps: distributing a bus right to use to each main node through a variable time slot rotation method when a plurality of main nodes exist on the bus; when certain main node needs to occupy the bus to communicate, waiting for an arbitration time slot corresponding to the main node, beginning a communication process in the corresponding arbitration time slot, suspending the timing and the rotation of the arbitration time slot, and causing the arbitration time slot to be expanded to a communication time slice; and after the communication process ends, restoring the timing and the rotation of the arbitration time slot again. The multi-master arbitration method reduces the length of the arbitration time slot, can quicken the rotation speed of each main node on the bus, reduces communication resource waste, improves arbitration efficiency and improves the instantaneity of a bus system through the variable time slot rotation method.

Description

technical field [0001] The invention relates to a multi-master arbitration method in an embedded system bus, in particular to a multi-master arbitration method in a dynamically reconfigurable high-speed serial bus. Background technique [0002] The dynamic reconfigurable high-speed serial bus (UM-BUS) is a high-speed serial bus with remote expansion capability, which is proposed for system miniaturization and embedded integrated design, which can organically unify redundant fault tolerance and high-speed communication. Such as figure 1 As shown, it adopts a bus topology based on M-LVDS technology, supports direct interconnection of multiple nodes, and can use up to 32 channels to transmit communications concurrently. During the communication process, if some channels fail, the bus controller can monitor them in real time, dynamically allocate data to the remaining effective channels for transmission, realize dynamic reconstruction, and dynamically fault-tolerant communicati...

AI Technical Summary

Problems solved by technology

For the UM-BUS bus, the above-mentioned arbitration algorithm has problems such as low arbitration efficiency, large transfer delay, token loss, and poor bandwidth utilization, which cannot meet the real-time and reliability requirements of the UM-BUS bus.

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