OPNET Simulation Strategy QoS Queue Mechanism

The rapid development of Internet and popularity made it to a single network for multimedia real-time and non-real-time operational data, and other business operations of the common transmission is a pressing cutting need.In a single network to achieve a variety of business regulation to provide an effective means of achieving the QOS control, the packet queue scheduling mechanism for QOS control is a core component of the network. And the next generation network is based on a technology network, And effectively guaranteed a network carrying many types of business and quality of service, is the communication network to the next generation evolution of the network key Clearly, a network providing QOS control of the queue scheduling algorithm is the next generation in recent years and the network of a hot researchIn the network, such as buffer zones and link bandwidth and other network resources will allow all users to share. However, some new problems also stems from. Suppose a user group in the same link, transmission of data packets. At this point on the packet scheduling rules need to determine which one packet to the next one packet transmission, In other words, the full capacity utilization of network resources, require sophisticated queue scheduling algorithm to different business users set different flow to meet the priority needs of QOS.Packet Scheduling Algorithm of the queue mechanism is strategy in the network to provide the quality of service one of the key links, When the need for sending the data package, Packet network nodes need scheduling algorithm in accordance with the rules of service from a number of different formations Retrieve the choice of a suitable number of According to the corresponding packet scheduling and services For most Internet users QOS is an important issue. In this paper, we illustrate the DifServ architecture and standards in networks, And then describe how to construct a DifServ Domain. We simulate our research in OPNET Modeler with several queuing schemes. And we analyze the result at the end of this paper.