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This paper proposes a novel multimedia network backbone architecture that supports all-optical transmission and quality of service (QoS). A new media access control (MAC) protocol for this network named CSMA/CP (carrier sense multiple access/carrier preemption) is used to directly transport variable size IP packets on the DWDM ring network without encapsulating IP packets to SONET; it improves the transport efficiency of network In addition, this network also provides the survivability function to increase reliability for restoring any node or fiber failures. In the thesis, the system model of the network is built, analyzed, and simulated. Simulation results show the proposed MAC protocol is able to take higher node throughput and lower packet latency. Finally, the proportional delay differentiated mechanism is added for this system to support differentiated services (DiffServ).