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In the era of application convergence, the embedded systems are required to support multiple applications with different traffic patterns and quality of service (QoS) requirements. But continual process technology's shrinking trend makes the communication network of the embedded system the performance bottleneck for its increased latency. To ameliorate this problem, a communication-centric embedded system architecture (ACCESA) is proposed in this paper which is modular and block based. The modular and block based architecture of ACCESA helps in performance improvement of the embedded system by means of flexible and efficient QoS provisions and power management. The pre-fabricated or preconfigured hybrid and hierarchical communication network of ACCESA saves on run-time reconfiguration time and on interconnect cost by preventing under utilization of communication resources without sacrificing on processing speed and throughput of the applications. This reduced and efficient resource usage in ACCESA in turn saves on power consumption of the chip.