一种基于P2P流量规划的网络资源可重构分配方法  

A Network Resources Reconfigurable Allocation Method Based on P2P Traffic Planning

作　　者：马东超[1] 王晓亮[2] 杨参[2] 马礼[1] 

机构地区：[1]北方工业大学信息工程学院,北京100041 [2]北京大学软件与微电子学院,北京100871

出　　处：《计算机学报》2012年第12期2515-2527,共13页Chinese Journal of Computers

基　　金：国家自然科学基金(61272446;61170292;60970104);北京市自然科学基金项目(4122023);北京市属高等学校人才强教计划项目(PHR201007121)资助

摘　　要：现有IP网络的无连接性和网络资源的松散管理结构使得网络流量存在全局范围内的分布不均情况,造成网络资源利用率低并且对运营商的一些突发的QoS需求很难做到快速响应.具备网络资源集中式管理特征的可重构网络虽然弥补了这一不足,但对特定业务的流量优化能力以及按需合理重构网络资源的能力不足,使得可重构网络资源分配及QoS保障技术仍有待进一步提高,尤其是占据网络流量主体的P2P业务流量和突发性高优先级QoS保障.当前的P2P优化以及流量工程技术不但自身存在不完善,并且也不能高效地直接适用于可重构网络环境中.因此,文中站在网络资源全局统筹的角度,提出了一种应用于可重构网络环境中的、基于P2P流量规划的网络资源动态可重构技术,使得可重构网络的资源管理机制有能力对全网P2P流量进行优化调度,尤其是能够在网络资源不足的情况下,通过调整P2P流量,释放指定网络资源以响应突发高优先级需求.通过仿真验证可见,以P2P流量规划的手段对全网资源进行全局规划、动态重构,形成弹性的可重构网络环境中,网络流量负担、P2P节点出、入度等多方面均有较大幅度提升,从而赋予了运营商一种对各种优先级业务的规划手段.Maldistribution of network traffic widely exists because of the connectionless and in compact management of network resources in current IP network. This problem causes low usage rate of network resources and hard response to sudden QoS requirements by ISPs. Reconfigurable network with features of network resource concentration management solves this problem, but the lack of specific service optimization and network resources reconstruction capability causes that resource allocation and QoS are still to be further improved especially the P2P traffic and un- expected high-priority service. The current P2P optimization and traffic engineering technology not only have their own problems, but also cannot be directly used in the reconfigurable network environment efficiently. Therefore, this article standing on the global design level of network resources, propose a dynamically reconfigurable technology based on P2P traffic planning and fits for the reconfigurable network environment. This technology makes reconfigurable network re- source management mechanisms have the ability to schedule the P2P traffic of the entire network,especially in the short of network resources circumstances, by adjusting the P2P traffic to release the specified network resources in response to the unexpected high priority needs. The emulations show that the traffic burden, P2P node output degree and input degree are more improved. This can establish a flexible reconfigurable network environment and give a service adjusting instru- ment to ISPs.

关 键 词：流量规划 网络资源可重构 P2P 突发流量需求 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]