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In recent years, the concept of autonomicity has been proposed to solve the complexity issues of the network and reduce the manual intervention. The self-* properties of the autonomic network, such as self-configuration, self-healing, self-optimizing and self-management, enable the network to adapt to the heterogeneous and complex network environments. On the other hand, with the rapidly growing demand for Quality of Service (QoS), it is hard to satisfy the QoS requirement with the traditional manual methods. In this paper, a novel autonomic architecture for QoS management in wired network is proposed. With a clean-slate A4D (Autonomic 4D) approach adopted and autonomic mechanisms introduced into the traditional DiffServ framework, the proposed architecture is capable of adjusting network behavior adaptively to meet the users' QoS requirements.