面向宽带分组业务的多层多域光网络关键技术研究
发布时间：2018-08-07 14:18
【摘要】：在以IP业务为代表的分组业务量井喷式增长和新型业务不断涌现所导致的巨大带宽需求的刺激下,光网络技术迅速发展并不断演变。同时,光网络技术的迅速发展又推动了宽带流媒体应用的快速增长,以视频流媒体为代表的宽带分组业务应用成为驱动运营商网络转型的主要推动力。支持分组传送、满足多种类型宽带分组业务的不同QoS需求是下一代传送网的主要特点之一。与此同时,当前网络的异构性和大规模化的趋势明显,多层多域网络是未来传送网的发展趋势,多层多域网络的设计问题、资源配置和优化问题也成为传送网邻域研究的热点 在攻读博士学位期间,作为主要研究人员,本人参与并完成863和企业基金项目,对分组业务模型及其在光网络中的特征、分组传送网T-MPLS/MPLS-TP的管理维护问题和保护机制问题、多层多域网络的组网设计和分域问题进行了理论研究和仿真实验,取得的主要创新成果有： 1、针对目前光网络中不同的业务特征和QoS需求,给出自相似业务和流媒体业务模型,构造了自相似性业务发生模块并进行了仿真,提出了一种层次化的流媒体业务仿真方案,分别设计了存储流媒体业务和实时流媒体业务的仿真流程,并给出了两种流媒体业务对应的日志形式的数据参量。 2、在分析分组传送网OAM和保护倒换需求的基础上,结合当前的网络特点,基于环回和源路由联合保护技术,提出了一种保证业务时序正确并降低丢包率的联合优化方案,仿真结果表明所提方案在平均延时和平均丢包数方面均具有良好的性能。 3、在基于PCE的多域网络中,研究了多域光网络中的路径计算单元(PCE)位置选取技术,基于二次整形规划算法抽象出多域网络中PCE选址策略的数学模型； 4、提出了两种PCE选址相关算法：全局优化算法(GOP)和分布式优化算法(DOP),仿真结果表明所提出的两种算法可以显著的降低控制信息通信开销,其中的DOP算法无需全局拓扑信息就可以获得接近最优的结果。
[Abstract]:Stimulated by the blowout growth of packet traffic represented by IP services and the huge bandwidth demand caused by the continuous emergence of new services, the optical network technology develops rapidly and evolves. At the same time, the rapid development of optical network technology has promoted the rapid growth of broadband streaming media applications. The broadband packet service application represented by video streaming media has become the main driving force to drive the network transformation of operators. One of the main characteristics of next generation transport networks is to support packet transmission and to meet the different QoS requirements of various types of broadband packet services. At the same time, the current network heterogeneity and large-scale trend is obvious, multi-layer multi-domain network is the development trend of the future transport network, multi-layer and multi-domain network design problem, The problem of resource allocation and optimization has also become a hot spot in the study of transport network neighborhood. During the period of studying for a doctoral degree, as a leading researcher, I participated in and completed 863 and enterprise fund projects. The model of packet traffic and its characteristics in optical networks, the management and maintenance of packet transport network (T-MPLS/MPLS-TP), the protection mechanism, the design of multi-layer and multi-domain network and the simulation experiments are carried out. The main innovative achievements are as follows: 1. According to the different service characteristics and QoS requirements of optical network at present, the model of self-similar service and streaming media service is given, and the self-similar service generation module is constructed and simulated. In this paper, a hierarchical simulation scheme of streaming media service is proposed, and the simulation flow of storage streaming media service and real time streaming media service is designed respectively. The data parameters of two kinds of streaming media services are given. 2. On the basis of analyzing the requirements of packet transport network (OAM) and protection switching, combined with the characteristics of current network, combined with the combined protection technology of loop return and source routing, the data parameter of two kinds of streaming media services is given. A joint optimization scheme is proposed to ensure correct service timing and reduce packet loss rate. Simulation results show that the proposed scheme has good performance in terms of average delay and average number of packets lost. 3. In multi-domain networks based on PCE, the proposed scheme has good performance. The (PCE) location selection technology of path computing unit in multi-domain optical network is studied. The mathematical model of PCE location strategy in multi-domain network is abstracted based on quadratic shaping planning algorithm. 4. Two PCE location correlation algorithms are proposed: global optimization algorithm (GOP) and distributed optimization algorithm (DOP),). The simulation results show that the proposed two algorithms can significantly reduce the overhead of control information communication. The DOP algorithm can obtain close to optimal results without global topology information.
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN929.1
本文编号：2170294
[Abstract]:Stimulated by the blowout growth of packet traffic represented by IP services and the huge bandwidth demand caused by the continuous emergence of new services, the optical network technology develops rapidly and evolves. At the same time, the rapid development of optical network technology has promoted the rapid growth of broadband streaming media applications. The broadband packet service application represented by video streaming media has become the main driving force to drive the network transformation of operators. One of the main characteristics of next generation transport networks is to support packet transmission and to meet the different QoS requirements of various types of broadband packet services. At the same time, the current network heterogeneity and large-scale trend is obvious, multi-layer multi-domain network is the development trend of the future transport network, multi-layer and multi-domain network design problem, The problem of resource allocation and optimization has also become a hot spot in the study of transport network neighborhood. During the period of studying for a doctoral degree, as a leading researcher, I participated in and completed 863 and enterprise fund projects. The model of packet traffic and its characteristics in optical networks, the management and maintenance of packet transport network (T-MPLS/MPLS-TP), the protection mechanism, the design of multi-layer and multi-domain network and the simulation experiments are carried out. The main innovative achievements are as follows: 1. According to the different service characteristics and QoS requirements of optical network at present, the model of self-similar service and streaming media service is given, and the self-similar service generation module is constructed and simulated. In this paper, a hierarchical simulation scheme of streaming media service is proposed, and the simulation flow of storage streaming media service and real time streaming media service is designed respectively. The data parameters of two kinds of streaming media services are given. 2. On the basis of analyzing the requirements of packet transport network (OAM) and protection switching, combined with the characteristics of current network, combined with the combined protection technology of loop return and source routing, the data parameter of two kinds of streaming media services is given. A joint optimization scheme is proposed to ensure correct service timing and reduce packet loss rate. Simulation results show that the proposed scheme has good performance in terms of average delay and average number of packets lost. 3. In multi-domain networks based on PCE, the proposed scheme has good performance. The (PCE) location selection technology of path computing unit in multi-domain optical network is studied. The mathematical model of PCE location strategy in multi-domain network is abstracted based on quadratic shaping planning algorithm. 4. Two PCE location correlation algorithms are proposed: global optimization algorithm (GOP) and distributed optimization algorithm (DOP),). The simulation results show that the proposed two algorithms can significantly reduce the overhead of control information communication. The DOP algorithm can obtain close to optimal results without global topology information.
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TN929.1
【参考文献】
相关期刊论文 前2条
1 祁云磊;曲桦;;T-MPLS的关键技术研究[J];电信科学;2007年03期
2 ;PCE-based routing and spectrum assignment in OFDM-based bandwidth-variable optical networks[J];The Journal of China Universities of Posts and Telecommunications;2012年02期
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