摘要
随着Internet的不断发展,实时数据的应用对网络提出了更高的服务质量控制要求,分组调度是实现网络服务质量控制的核心技术之一。分组调度按照一定的规则决定队列中分组的发送次序并分配共享链路带宽。文中介绍了一种先进的分组调度和资源管理模型:链路共享模型,以及两种不同的实现算法:CBQ和HPFQ,分析了它们用于传输实时流的可行性。HPFQ算法为实时数据提供了严格的时延保证和完全意义上的等级链路共享服务。文中使用网络仿真工具NS2,对链路共享模型下实时流传输的服务质量性能进行了仿真分析。
With the rapid development of Internet, real - time traffic calls for higher quality of services in the network. Packet scheduling is a key technology in QoS control. Packet scheduling discipline is needed to determine the packets scheduling order and how to share the network link bandwidth. This paper presents an advanced packet scheduling and resource management model： link - sharing model, and two implementation algorithms： CBQ and HPFQ. HPFQ provides both tight delay bounds for real - time sessions and the full semantics of hierarchical link - sharing service. This paper uses two algorithms for real - time flow transport, and a network simulation tool called NS2 is used to simulate and analyze the real - time flow performance.
出处
《计算机仿真》
CSCD
2007年第8期126-129,共4页
Computer Simulation
关键词
分组调度
链路共享
服务质量
实时流
Packet scheduling
Link sharing
Quality of services
Real - time traffic
