A Bidirectional Communication Extension for Decentralized SOC Architecture

The rapid evolution of SoC architectures has intensified the need for decentralized, real-time, peer-to-peer communication among heterogeneous IP cores-capabilities that traditional static master-slave interconnects cannot meet. Despite the widespread use of AMBA AXI, its standard form still lacks support for dynamic, bidirectional data exchange in decentralized systems. This work introduces a dynamic bidirectional AXI extension that enables IP cores to switch between transmit and receive roles during operation. The design employs modular RTL architecture with arbitration logic, handshake control, and FSM-based coordination to achieve low-latency commu- nication while preserving AXI compliance. Verification results demonstrate stable multi-core data transfer and significantly improved adaptability compared to static interconnects, making the proposed architecture well-suited for next-generation highperformance and real-time embedded SoC platforms.