BT网络中基于QoS约束集的抑制搭便车策略研究  

Research on Free-riding Inhibition Strategy Based on QoS Constraint Sets in the BT Network

作　　者：陈晶[1,2] 王海龙[1] 

机构地区：[1]燕山大学信息科学与工程学院计算机系,河北秦皇岛066004 [2]河北省计算机虚拟技术实验室,河北秦皇岛066004

出　　处：《小型微型计算机系统》2016年第12期2622-2626,共5页Journal of Chinese Computer Systems

基　　金：国家自然科学基金青年基金项目(61602401)资助;河北省自然科学基金项目(F2014203192)资助

摘　　要：BT网络中通常会存在由于热心节点面临过多请求而无法及时处理而导致网络QoS降低的问题.为此,提出基于QoS约束集的策略.首先,提出并描述了影响BT网络QoS的属性约束集;其次,以约束集中的属性为基础,分析了影响节点优先级的因素,给出了节点在网络中的综合效用值的计算方法,并依据综合效用值确定了节点在网络中的优先级和服务顺序;最后,以优先级次序和邻居节点为基础,给出了抑制节点搭便车的处理过程,并对提出的策略进行了实验验证.实验结果表明,该策略在对搭便车节点进行抑制的同时保证了BT网络的QoS.At present,BT network usually exist the problems of reducing the QoS which many nodes are eager request can not be time- ly treatment. Therefore, a QoS constraint strategy is proposed in this paper. Firstly, the QoS constraint sets are described in the BT net- work. Secondly, on the basis of attribute constraint set, the influence factors of node priority is analyzed, and the calculation method of the utility value of nodes is given, and the service order and priorities of the nodes are determined based on the comprehensive utility value in the network. Finally ,the processing of the nodes free-riding inhibition is described based on priority and neighbor downloading nodes, and the strategy is tested by simulation experiment. The experimental results show that, the strategy of nodes free-riding inhibi- tion ensures the QoS of BT network.

关 键 词：BT网络 QoS属性约束 搭便车 综合效用值 邻居下载节点 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]