一种基于优先级的分组丢弃算法PRED  

Algorithm for packet dropping based on precedence

作　　者：夏清国[1] 高德远[1] 姚群[2] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072 [2]空军工程大学电讯工程学院,陕西西安710077

出　　处：《计算机应用》2004年第12期33-35,共3页journal of Computer Applications

基　　金：国家自然科学基金资助项目 (6 0 2 73 0 88)

摘　　要：针对实时业务如语音,分析了现有的Internet的缓冲管理算法———DropTail算法的缺陷,提出了一种基于优先级的分组丢弃算法———PRED算法。PRED算法体现了分组的相对优先级,并能自适应地对分组的服务级别进行平滑地升级或降级,因而很适于作为DiffServ网络中的分组丢弃算法。仿真结果证明了理论分析的正确性。For real time service such as voice, Drop Tail algorithm, the buffer management (packet dropping) algorithm implemented in current Internet was analyzed. Because of its unsatisfactory performance, a packet dropping algorithm based on precedence named PRED was proposed. The PRED algorithm could reflect the relative precedence of packet, and adjust the service level of packet adaptively. Thus, it is an ideal packet dropping algorithm for DiffServ model. The simulation shows the validity of the theory analysis.

关 键 词：服务质量 区分服务 缓冲管理 分组丢弃 

分 类 号：TP391.02[自动化与计算机技术—计算机应用技术]