IP QoS与网络效用最大化的研究
发布时间：2018-11-03 08:26
【摘要】：基于效用的资源分配方法,通过效用函数来研究网络资源分配问题,效用函数描述的是用户对于分配给自己确定的资源的满意度。NUM(网络效用最大化)作为一种研究有中心控制网络的模型被广泛的采用,它将所有用户的满意度与分配策略联系起来。NUM框架需要建立相应的效用最大化数学模型,使得网络效用的分析和优化具有理论指导。IP QoS(服务质量)是一种保证质量的控制机制,采用IP QoS机制网络具有满足给定业务合同的能力,包括专用带宽、抖动控制和延迟(用于实时和交互式流量情形)、丢包率等等。IP QoS在新的时代背景下,具有非常重要的意义,如何将网络效用最大化与IP QoS结合起来,为用户提供高效和多样性的网络服务,同时,保证网络的可伸缩型是近几年的研究的热点。伸缩性要求能够更加灵活的配置用户的类型,高效要求网络能够消耗最低的成本,提供给用户最满意的服务。 本文从IP QoS的服务模型和NUM的理论模型出发,分析IP QoS服务模型之间的差异和常见的队列管理策略,同时,介绍了NUM的理论模型和相关的模型优化的方法。讨论了IP QoS和NUM两者之间的联系,将QoS服务模型与NUM理论模型结合起来,提出了通过将QoS服务模型中的各种业务流的类型(Best Effort、Soft QoS、Hard QoS)进行参数化,利用参数来区分不同的服务的类型和指标,为不同业务类型参数化其效用函数。在建立的统一的效用函数的基础上,建立NUM模型,通过优化理论,研究资源分配问题。然后,基于理论分析和模型优化,设计资源分配算法,进行资源的分配。最后,通过实验数据进行仿真,分析了不同情况下的资源分配情况,保证在条件容许的情况下,用户既能够获得合同定义的服务质量,又能够最大化网络的效用。
[Abstract]:Utility based resource allocation method is used to study the problem of network resource allocation through utility function. Utility function describes the user's satisfaction with the resources assigned to him,. NUM (network utility maximization) as a model for the study of a central control network is widely used. It links the satisfaction of all users to the allocation strategy. The NUM framework needs to establish a mathematical model for maximizing utility. So that the analysis and optimization of network utility has the theoretical guidance of. IP QoS (quality of service) is a kind of quality control mechanism. The IP QoS mechanism network has the ability to satisfy the given service contract, including the dedicated bandwidth. Jitter control and delay (for real-time and interactive traffic cases), packet loss rate and so on, are of great significance in the new era, how to combine the network utility maximization with IP QoS, To provide users with efficient and diverse network services and to ensure the scalability of the network is a hot topic in recent years. Scalability requires a more flexible configuration of user types, and efficiency requires that the network consume the lowest cost and provide the most satisfactory services to users. Based on IP QoS service model and NUM theory model, this paper analyzes the differences between IP QoS service models and common queue management strategies. At the same time, it introduces the theoretical model of NUM and the methods of model optimization. This paper discusses the relationship between IP QoS and NUM, combines QoS service model with NUM theory model, and proposes to parameterize the types of traffic flow (Best Effort,Soft QoS,Hard QoS) in QoS service model. The utility function of different service types is parameterized by using parameters to distinguish different service types and indicators. On the basis of the unified utility function, the NUM model is established, and the resource allocation problem is studied by optimization theory. Then, based on theoretical analysis and model optimization, resource allocation algorithm is designed to allocate resources. Finally, through the simulation of the experimental data, the resource allocation in different cases is analyzed to ensure that the user can obtain the quality of service defined by the contract and maximize the utility of the network.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.09
本文编号：2307247
[Abstract]:Utility based resource allocation method is used to study the problem of network resource allocation through utility function. Utility function describes the user's satisfaction with the resources assigned to him,. NUM (network utility maximization) as a model for the study of a central control network is widely used. It links the satisfaction of all users to the allocation strategy. The NUM framework needs to establish a mathematical model for maximizing utility. So that the analysis and optimization of network utility has the theoretical guidance of. IP QoS (quality of service) is a kind of quality control mechanism. The IP QoS mechanism network has the ability to satisfy the given service contract, including the dedicated bandwidth. Jitter control and delay (for real-time and interactive traffic cases), packet loss rate and so on, are of great significance in the new era, how to combine the network utility maximization with IP QoS, To provide users with efficient and diverse network services and to ensure the scalability of the network is a hot topic in recent years. Scalability requires a more flexible configuration of user types, and efficiency requires that the network consume the lowest cost and provide the most satisfactory services to users. Based on IP QoS service model and NUM theory model, this paper analyzes the differences between IP QoS service models and common queue management strategies. At the same time, it introduces the theoretical model of NUM and the methods of model optimization. This paper discusses the relationship between IP QoS and NUM, combines QoS service model with NUM theory model, and proposes to parameterize the types of traffic flow (Best Effort,Soft QoS,Hard QoS) in QoS service model. The utility function of different service types is parameterized by using parameters to distinguish different service types and indicators. On the basis of the unified utility function, the NUM model is established, and the resource allocation problem is studied by optimization theory. Then, based on theoretical analysis and model optimization, resource allocation algorithm is designed to allocate resources. Finally, through the simulation of the experimental data, the resource allocation in different cases is analyzed to ensure that the user can obtain the quality of service defined by the contract and maximize the utility of the network.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.09
【参考文献】
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