基于SDN的异构无线网络流量分载技术研究
发布时间：2018-12-28 18:30
【摘要】：随着无线通信技术的不断发展,移动数据流量快速增长,同时也为移动蜂窝网带来了流量过载的挑战。为了减轻流量压力,异构网络协作分流的方法备受重视。然而考虑到不同接入网络的差异性和外部环境的波动性,如果不能对异构网络进行统一有效的管理控制,将必然导致网络资源不能按需分配和带宽资源利用率较低等严重的问题。因此,为了实现异构网络在流量分配领域的协同合作,需要进一步研究有效的分流方法。本文围绕异构网络分流问题,从基于SDN的分流架构及自适应流量分载算法两个方面进行了深入研究。具体创新成果如下： 第一,以软件定义网络(SDN)为研究基础,基于无线接入网络协作分流的场景,提出了一种新型的开放式分流架构,深入研究了网络控制器的实现方法和层间通信协议的制定,采用无线网络资源抽象和无缝移动管理两项基本功能实现底层异构接入网的统一管理。 第二,提出了一种基于吸引粒子选择算法(Attractor Selection)的自适应流量分载算法,选取LTE与WLAN重覆盖网络的场景,采用离散马尔可夫-泊松过程的排队模型(dMMPP)计算业务接入时延,自适应地根据不断波动的网络状态选择合适的接入网络进行分流。通过仿真表明,该方法不但有效地实现了LTE网络与WLAN网络之间的分流,而且使系统性能在时延和网络切换次数上达到了均衡,在满足用户业务需求的同时提高了网络的稳定性。
[Abstract]:With the continuous development of wireless communication technology, mobile data traffic is growing rapidly, but also brings the challenge of traffic overload for mobile cellular networks. In order to reduce traffic pressure, the method of collaborative streaming in heterogeneous networks has been paid more attention. However, considering the diversity of different access networks and the volatility of the external environment, if the heterogeneous network can not be unified and effective management control, It will inevitably lead to some serious problems, such as network resources cannot be allocated according to their needs and the utilization of bandwidth resources is low. Therefore, in order to achieve collaborative cooperation in the field of traffic allocation in heterogeneous networks, it is necessary to further study effective shunt methods. In this paper, the shunt architecture based on SDN and the adaptive traffic load splitting algorithm are studied in detail around the shunt problem of heterogeneous networks. The concrete innovation achievements are as follows: first, based on the research of software defined network (SDN), a new open shunt architecture is proposed based on the scenario of wireless access network collaboration and shunt. The realization method of network controller and the formulation of communication protocol between layers are deeply studied. Two basic functions of wireless network resource abstraction and seamless mobile management are adopted to realize the unified management of the underlying heterogeneous access network. Secondly, an adaptive traffic load sharing algorithm based on the particle selection algorithm (Attractor Selection) is proposed. The scenario of LTE and WLAN recoverage network is selected, and the queue model (dMMPP) of discrete Markov Poisson process is used to calculate the service access delay. Adaptively select the appropriate access network according to the fluctuating state of the network. The simulation results show that the proposed method not only realizes the shunt between LTE network and WLAN network effectively, but also equalizes the system performance in terms of delay and network handover times, and improves the stability of the network while satisfying the needs of user services.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN92
本文编号：2394277
[Abstract]:With the continuous development of wireless communication technology, mobile data traffic is growing rapidly, but also brings the challenge of traffic overload for mobile cellular networks. In order to reduce traffic pressure, the method of collaborative streaming in heterogeneous networks has been paid more attention. However, considering the diversity of different access networks and the volatility of the external environment, if the heterogeneous network can not be unified and effective management control, It will inevitably lead to some serious problems, such as network resources cannot be allocated according to their needs and the utilization of bandwidth resources is low. Therefore, in order to achieve collaborative cooperation in the field of traffic allocation in heterogeneous networks, it is necessary to further study effective shunt methods. In this paper, the shunt architecture based on SDN and the adaptive traffic load splitting algorithm are studied in detail around the shunt problem of heterogeneous networks. The concrete innovation achievements are as follows: first, based on the research of software defined network (SDN), a new open shunt architecture is proposed based on the scenario of wireless access network collaboration and shunt. The realization method of network controller and the formulation of communication protocol between layers are deeply studied. Two basic functions of wireless network resource abstraction and seamless mobile management are adopted to realize the unified management of the underlying heterogeneous access network. Secondly, an adaptive traffic load sharing algorithm based on the particle selection algorithm (Attractor Selection) is proposed. The scenario of LTE and WLAN recoverage network is selected, and the queue model (dMMPP) of discrete Markov Poisson process is used to calculate the service access delay. Adaptively select the appropriate access network according to the fluctuating state of the network. The simulation results show that the proposed method not only realizes the shunt between LTE network and WLAN network effectively, but also equalizes the system performance in terms of delay and network handover times, and improves the stability of the network while satisfying the needs of user services.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN92
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