WO2017063511A1 - Sdn-based residential cell network control system - Google Patents

Sdn-based residential cell network control system Download PDF

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WO2017063511A1
WO2017063511A1 PCT/CN2016/101431 CN2016101431W WO2017063511A1 WO 2017063511 A1 WO2017063511 A1 WO 2017063511A1 CN 2016101431 W CN2016101431 W CN 2016101431W WO 2017063511 A1 WO2017063511 A1 WO 2017063511A1
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switch
cell
network
network service
home
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PCT/CN2016/101431
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French (fr)
Chinese (zh)
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鲁珂
李晶晶
刘杰彦
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成都电科致远网络科技有限公司
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  • the invention belongs to the technical field of computer network networking and control technology, and more particularly to an SDN-based residential community network control system.
  • SDN Software Defined Network
  • the network deployment scheme of the residential community is mostly a traditional mechanism.
  • the broadband operator provides the user with a certain bandwidth of the network line.
  • the forwarding mode and QoS (Quality of Service) guarantee of the line are usually fixed on the switch and Among the routers, it cannot dynamically adapt to different services and access scenarios.
  • the bandwidth between different users in the cell cannot be shared.
  • the Ethernet outlets of different users in the cell must compete for the bandwidth, so that the utilization efficiency of bandwidth resources is relatively low.
  • the traditional QoS service is based on ports, or is based on services. The same service data packets of different users or user groups are treated equally, and it is impossible to provide users with finer QoS.
  • the object of the present invention is to overcome the deficiencies of the prior art and provide an SDN-based residential cell network control system to provide a fine QoS management mechanism for users.
  • the present invention is based on an SDN residential network control system, which is characterized in that it comprises a plurality of home network service terminals, a cell switch, a virtualization server and an SDN controller;
  • the plurality of home network service terminals are respectively used to replace existing routers in each home in the residential cell, and the home network service terminal includes two WAN (Wide Area Network) ports, and one is connected to the existing carrier broadband.
  • the network is connected to the virtualization server through the cell switch, and the home network service terminal receives the QoS policy delivered by the SDN controller, allocates bandwidth resources for the internal network connection of the home, and provides QoS guarantee;
  • the cell switch is configured to connect the home network service terminal in each home to the virtualization server, and receive the QoS policy delivered by the SDN controller to provide QoS guarantee for different home network service terminals;
  • the virtualization server is connected to the Internet (Internet) through a dedicated network line, and is used to provide virtualized desktop services to the homes in the residential cell through the cell switch and the home network service terminal. At the same time, the virtualization server receives the SDN controller. QoS policy to provide QoS guarantee for different virtualized desktop connections;
  • the SDN controller is a control center of the entire residential cell network, and the QoS policy is embodied in the form of a flow table.
  • the SDN controller dynamically delivers the information to the home network service terminal, the cell switch, and the virtualization server according to the current status of the residential cell network.
  • the flow table allocates network bandwidth resources for each network connection of the user from top to bottom and provides QoS guarantee.
  • the present invention further includes a building switch for connecting each home network service terminal in the community building and reconnecting to the virtualization server through the cell switch; the SDN controller dynamically moves to the building according to the current status of the residential network network.
  • the telnet switch delivers the QoS policy
  • the building dong switch receives the QoS policy delivered by the SDN controller to provide different QoS guarantees for different home network service terminals.
  • the user group switch is further configured to connect the home network service terminals of the home users having the same attribute, and then reconnect to the virtualization server through the cell switch; and the SDN controller dynamically updates according to the current status of the residential network.
  • the QoS policy is delivered to the building switch, and the user group switch receives the QoS policy delivered by the SDN controller to provide different QoS guarantees for different home network service terminals.
  • the home network service terminal, the building switch, the user group switch, the cell switch, and the virtualization server all support the OpenFlow protocol.
  • each of the virtualization servers can virtualize multiple virtual machines, different virtual machines have different IP addresses, and different home network service terminals access the specified virtual machines through IP addresses to provide virtualized virtual machines.
  • Service the virtualization server installs Open vSwitch, and OpenvSwitch supports OpenFlow protocol.
  • the technical solution of the present invention is based on the idea of a software-defined network, and provides a top-down globalization for users in a residential cell, hierarchical network QoS guarantee, and can finely control each network of users. Network connection.
  • the solution disclosed by the present invention can smoothly integrate the original network deployment of the user while providing the user with the virtualized desktop service.
  • FIG. 1 is a network topology diagram of an SDN-based residential cell network control system according to an embodiment of the present invention
  • FIG. 2 is a functional block diagram of a home network service terminal
  • FIG. 3 is a functional structural diagram of a network connection module in a home network service terminal
  • Figure 5 is a flow chart of the processing of data packets in the switch.
  • an SDN-based residential cell network control system includes m home network service terminals 101, a building switch 102 or a subscriber group switch 103, a cell switch (OLT) 104, a virtualization server 105, and an SDN control.
  • the user equipment 107 in FIG. 1 represents a network connection of different network devices connected to the home network service terminal 101, that is, a home network. For the sake of simplicity of the drawing, only the mth home network service terminal 101 draws n user equipments 107, and the others The user equipment 107 connected to the home network service terminal 101 is not shown.
  • the home network service terminal 101 is used to replace an existing router in the home, which includes two WAN ports, one for connecting to the existing carrier broadband network 108 and the other for connecting through the cell switch 104, the building switch 102 or the user.
  • the group switch 103 is connected to the virtualization server 105.
  • the home network service terminal 101 supports the OpenFlow protocol and receives the QoS policy delivered by the SDN controller 106 for the home interior.
  • the network connection allocates bandwidth resources and provides QoS guarantee.
  • the building switch 102, the subscriber group switch 103, and the cell switch 104 are switch devices that support the OpenFlow protocol.
  • a building switch 102 can connect a plurality of home network service terminals 101 in a building and forward the data packets of the home network service terminal 101 to the associated cell switch 104 through the appropriate ports.
  • the building switch 102 receives the QoS policy delivered by the SDN controller 106, and provides QoS guarantee for all the home network service terminals 101 connected thereto. Further, if it is not considered from the location of the user, but based on the attribute of the user, the building switch 102 can be transformed into the user group switch 103, and the user group switch 103 can connect the home network service terminal 101 of the user having the same attribute.
  • the user group switch 103 receives the QoS policy delivered by the SDN controller 106 and provides QoS guarantee for all users connected thereto.
  • the building switch 102 and the subscriber group switch 103 are optional devices, and the functions of the cell switch 104 can be directly implemented.
  • the cell switch 104 is the closest to the backbone network in the residential cell. In the current mainstream optical network environment, the cell switch 104 can be either a general network switch or an optical line terminal (OLT) according to the size of the cell. ).
  • the cell switch 104 supports the OpenFlow protocol, and receives the QoS policy delivered by the SDN controller 106 to provide different QoS guarantees for different building switches 102 or user group switches 103. In the absence of the building switch 102 and the user group switch 103, In this case, the cell switch 104 directly connects to the home network service terminal 101, and provides QoS guarantee for different home network service terminals 101 by receiving the QoS policy delivered by the SDN controller 106.
  • the virtualization server 105 is configured to provide a virtualized desktop service to a home user in the cell.
  • a plurality of virtual machines 109 can be virtualized in a virtualized server 105, and each virtual machine 109 is connected to a home network service terminal 101.
  • the virtualization server 105 connects to the Internet through a dedicated network line, and the home network service terminal 101 sends a virtual desktop connection request issued by the user to the virtualization server 105 through the building switch 102 and the cell switch 104.
  • the virtualization server 105 installs an Open vSwitch, supports the OpenFlow protocol, and receives QoS policies issued by the SDN controller 106 to provide QoS guarantee for different virtualized desktop connections.
  • the SDN controller 106 is a control center of the entire residential cell network, and according to the rules defined by the administrator, combined with the user attributes and the current network traffic status, the QoS policy is formulated into a flow table, and dynamically A flow table is sent to the home network service terminal 101, the building switch 102 or the subscriber group switch 103, the cell switch 104, and the virtualization server 105, thereby allocating network bandwidth resources for each network connection of the user from top to bottom, and providing QoS. Guarantee.
  • the Open vSwitch in the virtualization server 105 sends a flow table to provide QoS guarantee for each virtual machine 109 in the designated virtualization server 105.
  • a home network service terminal 101 is provided for each home user, and the terminal should at least include the functional modules shown in FIG. 2.
  • the home network service terminal 101 is simply abstracted as a virtualized desktop service module 201 and a network device connection module 202.
  • the virtualized desktop service module 201 is configured to provide a virtualized desktop service to the user, including display of the virtual desktop and interaction of the user.
  • the network device connection module 202 is configured to provide network connection support for the virtualized desktop service module 201.
  • the network device connection module 202 provides the wired network access module 203, the wireless network access module 204, and the routing module 205 to provide The corresponding function.
  • the user can continue to use the original network connection after accessing the virtualized desktop service, and the network device connection module configures 202 two WAN ports 206, one of which is used for accessing the user.
  • the original carrier broadband network 108, another WAN port is used to connect to the virtualization server 105.
  • a home network service terminal 101 There may be multiple network connections on a home network service terminal 101, such as different web browsing connections, download connections, mail connections, and virtualized desktop service connections. At the same time, these connections can be created by different user devices 109, such as mobile phones, tablets, and the like. Obviously, these network connections can be made either by wired access or by wireless access. All connections are forwarded through the network device connection module 202 to the corresponding network exit.
  • the function of the network device connection module 202 is not only forwarding network packets but also for each network.
  • the connection provides QoS guarantees.
  • the network device connection module 202 supports the OpenFlow protocol, and the forwarding rules are uniformly delivered by the SDN controller 106.
  • the structural topology of the network device connection module 202 is as shown in FIG.
  • the internal part is composed of a data plane 301, a forwarding plane 302 and a control plane 303, and provides a management interface 304.
  • the control plane 303 refers to the OpenFlow Controller 305, which interacts with the SDN controller 106 to control the command, sends the local state to the SDN controller 106, and receives the flow table sent by the SDN controller 106.
  • the forwarding plane 302 is responsible for completing the datagram.
  • the forwarding plane 302 includes a wired access module 203, a wireless access module 204, and two WAN ports 206.
  • the wired access module 203 has N (N is a positive integer greater than 1) LAN ports 306, and the LAN port 306 is used to connect various devices in the user's home.
  • the data plane 301 is a core part of the network device connection module 202.
  • the OpenFlow control port 308 receives the control command of the OpenFlow Controller 305, and determines the operation of the received data according to the content in the flow table 307. These operations mainly include: Port forwarding, entering queues, modifying fields, and dropping.
  • the flow table 307 in the data plane 301 is a collection of some rule items, defining some rules and corresponding operations.
  • a typical general flow table structure is shown in FIG. 4, and includes a matching field 401, an action item 402, and a statistic item 403.
  • the matching field 401 is a field that matches the received message with the header information, such as a port number and an IP address.
  • the action item 402 is a corresponding operation after completing the matching, such as direct forwarding, enqueue, and discard, etc.; the statistical item 403 is used to record the number of times a certain match is completed.
  • the network device connection module 202 processes the data packet according to the process shown in FIG. 5, that is, in the 501 operation, the header information of the data packet is matched with the flow table item by item. Matching, in the 502 operation, according to the action item in the flow table, the action set corresponding to the record is updated, and the metadata is updated. When all the flow tables are matched, the 503 operation performs the related action in the action set.
  • the present invention has the following features:
  • the invention is based on the idea of SDN, and provides a scheme for deploying and managing a cell network, which realizes linkage control from a user home service terminal, a building switch, a user group switch to a cell switch (OLT), and simultaneously virtualizes the desktop.
  • the server provides a virtualized desktop service for home users, and uses a "brain" (SDN controller) to achieve global control of each network device in the residential cell.
  • SDN controller separating the forwarding plane and the control plane in the router (switch), Different application scenarios provide better services for users (user groups).
  • QoS management of the virtualized server Provides refined QoS guarantee for different users, and even groups users, providing different QoS guarantees for different user groups through user group switches or building switches.

Abstract

Disclosed is an SDN-based residential cell network control system, specifically comprising: a home network service terminal for substituting an existing router in a home, receiving an instruction of an SDN controller and providing a QoS guarantee for different terminals; a cell switch for connecting to the home network service terminal, receiving the instruction of the SDN controller and providing a QoS guarantee for different home network service terminals; a virtualized server for providing a virtualized desktop service to an intra-cell home user, receiving the instruction of the SDN controller and providing a QoS guarantee for different virtualized desktop connections; and the SDN controller, being a control centre of the whole cell network and used for dynamically issuing a flow table to the home network service terminal, the cell switch and the virtualized server according to a current condition of the cell network, allocating network bandwidth resources to each network connection of the user from top to bottom, and providing a QoS guarantee.

Description

一种基于SDN的住宅小区网络控制系统Residential area network control system based on SDN 技术领域Technical field
本发明属于计算机网络组网和控制技术领域,更为具体地讲,涉及一种基于SDN的住宅小区网络控制系统。The invention belongs to the technical field of computer network networking and control technology, and more particularly to an SDN-based residential community network control system.
背景技术Background technique
软件定义网络(Software Defined Network,SDN),是由美国斯坦福大学的研究人员提出的一种新型网络创新架构,其可以将网络设备控制面与数据面分离开来,从而实现了网络流量的灵活控制,为核心网络及应用的创新提供了良好的平台。近年来,SDN的思想已经应用到了各种不同的应用场景中,帮助人们更灵活,更方便地控制网络。Software Defined Network (SDN) is a new network innovation architecture proposed by researchers at Stanford University in the United States. It can separate the control plane of the network device from the data plane, thus achieving flexible control of network traffic. , providing a good platform for innovation in core networks and applications. In recent years, the idea of SDN has been applied to a variety of different application scenarios, helping people to be more flexible and more convenient to control the network.
目前,住宅小区的网络部署方案多是传统机制,由宽带运营商向用户提供一定带宽的网络线路,该线路的转发方式、QoS(Quality of Service,服务质量)保障等通常都是固定在交换机和路由器当中的,不能针对不同的业务和访问场景动态适应。在访问低峰,小区中不同用户之间的带宽不能共享,在访问高峰,小区中不同用户之间又要竞争提供的以太网出口,使得带宽资源的利用效率比较低。同时,传统的QoS服务是基于端口,或者说是基于业务的,不同用户或者用户组的相同业务数据包同等对待,无法为用户提供更精细的QoS。At present, the network deployment scheme of the residential community is mostly a traditional mechanism. The broadband operator provides the user with a certain bandwidth of the network line. The forwarding mode and QoS (Quality of Service) guarantee of the line are usually fixed on the switch and Among the routers, it cannot dynamically adapt to different services and access scenarios. In the low peak of access, the bandwidth between different users in the cell cannot be shared. In the peak of access, the Ethernet outlets of different users in the cell must compete for the bandwidth, so that the utilization efficiency of bandwidth resources is relatively low. At the same time, the traditional QoS service is based on ports, or is based on services. The same service data packets of different users or user groups are treated equally, and it is impossible to provide users with finer QoS.
发明内容Summary of the invention
本发明的目的在于克服现有技术的不足,提供一种基于SDN的住宅小区网络控制系统,以实现为用户提供精细的QoS管理机制。The object of the present invention is to overcome the deficiencies of the prior art and provide an SDN-based residential cell network control system to provide a fine QoS management mechanism for users.
为实现上述发明目的,本发明基于SDN的住宅小区网络控制系统,其特征在于,包括多个家庭网络服务终端、小区交换机、虚拟化服务器和SDN控制器;To achieve the above object, the present invention is based on an SDN residential network control system, which is characterized in that it comprises a plurality of home network service terminals, a cell switch, a virtualization server and an SDN controller;
所述多个家庭网络服务终端,分别用于代替住宅小区内各个家庭中现有的路由器,家庭网络服务终端包含两个WAN(Wide Area Network,广域网)口,一个连接到现有的运营商宽带网络,另一个通过小区交换机连接到虚拟化服务器,家庭网络服务终端接收SDN控制器下发的QoS策略,为家庭内部的网络连接分配带宽资源,提供QoS保障; The plurality of home network service terminals are respectively used to replace existing routers in each home in the residential cell, and the home network service terminal includes two WAN (Wide Area Network) ports, and one is connected to the existing carrier broadband. The network is connected to the virtualization server through the cell switch, and the home network service terminal receives the QoS policy delivered by the SDN controller, allocates bandwidth resources for the internal network connection of the home, and provides QoS guarantee;
所述小区交换机,用于将各个家庭中的家庭网络服务终端连接到虚拟化服务器,并接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供QoS保障;The cell switch is configured to connect the home network service terminal in each home to the virtualization server, and receive the QoS policy delivered by the SDN controller to provide QoS guarantee for different home network service terminals;
所述虚拟化服务器通过专门的网络线路连接Internet(互联网),用于向住宅小区内各个家庭通过小区交换机、家庭网络服务终端提供虚拟化桌面服务,同时,虚拟化服务器接收SDN控制器下发的QoS策略,为不同的虚拟化桌面连接提供QoS保障;The virtualization server is connected to the Internet (Internet) through a dedicated network line, and is used to provide virtualized desktop services to the homes in the residential cell through the cell switch and the home network service terminal. At the same time, the virtualization server receives the SDN controller. QoS policy to provide QoS guarantee for different virtualized desktop connections;
所述SDN控制器,是整个住宅小区网络的控制中心,QoS策略以流表的形式体现,SDN控制器根据住宅小区网络的当前状况动态地向家庭网络服务终端、小区交换机和虚拟化服务器下发流表,自上而下地为用户的每一个网络连接分配网络带宽资源,并提供QoS保障。The SDN controller is a control center of the entire residential cell network, and the QoS policy is embodied in the form of a flow table. The SDN controller dynamically delivers the information to the home network service terminal, the cell switch, and the virtualization server according to the current status of the residential cell network. The flow table allocates network bandwidth resources for each network connection of the user from top to bottom and provides QoS guarantee.
优选的,本发明还包括楼栋交换机,用于连接小区楼栋内的各个家庭网络服务终端,并通过小区交换机再连接到虚拟化服务器;SDN控制器根据住宅小区网络的当前状况动态地向楼栋交换机下发QoS策略,楼栋交换机接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供不同的QoS保障。Preferably, the present invention further includes a building switch for connecting each home network service terminal in the community building and reconnecting to the virtualization server through the cell switch; the SDN controller dynamically moves to the building according to the current status of the residential network network. The telnet switch delivers the QoS policy, and the building dong switch receives the QoS policy delivered by the SDN controller to provide different QoS guarantees for different home network service terminals.
优选的,还包括用户组交换机,用于将具有相同属性的家庭用户的家庭网络服务终端连接到一起,然后通过小区交换机再连接到虚拟化服务器;同时SDN控制器根据住宅小区网络的当前状况动态地向楼栋交换机下发QoS策略,用户组交换机接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供不同的QoS保障。Preferably, the user group switch is further configured to connect the home network service terminals of the home users having the same attribute, and then reconnect to the virtualization server through the cell switch; and the SDN controller dynamically updates according to the current status of the residential network. The QoS policy is delivered to the building switch, and the user group switch receives the QoS policy delivered by the SDN controller to provide different QoS guarantees for different home network service terminals.
优选的,所述家庭网络服务终端、楼栋交换机、用户组交换机、小区交换机和虚拟化服务器均支持OpenFlow协议。Preferably, the home network service terminal, the building switch, the user group switch, the cell switch, and the virtualization server all support the OpenFlow protocol.
优选的,每个所述虚拟化服务器,能虚拟出多个虚拟机,不同的虚拟机具有不同的IP地址,不同的家庭网络服务终端通过IP地址来访问指定的虚拟机,以便提供虚拟化虚拟化服务,所述虚拟化服务器安装Open vSwitch,OpenvSwitch支持OpenFlow协议。Preferably, each of the virtualization servers can virtualize multiple virtual machines, different virtual machines have different IP addresses, and different home network service terminals access the specified virtual machines through IP addresses to provide virtualized virtual machines. Service, the virtualization server installs Open vSwitch, and OpenvSwitch supports OpenFlow protocol.
本发明的技术方案具有以下有益效果:The technical solution of the present invention has the following beneficial effects:
本发明的技术方案基于软件定义网络的思想,为住宅小区内的用户提供一种自上而下的全局化,层次化网络QoS保障,可以精细地控制用户的每一路网 络连接。同时,本发明所公开的方案可以为用户提供虚拟化桌面服务的同时平滑地集成用户原有的网络部署。The technical solution of the present invention is based on the idea of a software-defined network, and provides a top-down globalization for users in a residential cell, hierarchical network QoS guarantee, and can finely control each network of users. Network connection. At the same time, the solution disclosed by the present invention can smoothly integrate the original network deployment of the user while providing the user with the virtualized desktop service.
实现从用户家庭路由器,楼栋交换机,用户组交换机到小区交换机(OLT)的联动控制,同时,加入虚拟化服务器为家庭用户提供虚拟化桌面服务,并使用一个“大脑”(SDN控制器)实现住宅小区内各个网络设备的全局控制,采用层次化的QoS策略,在网络全局范围内实现资源的分配和调度,为用户提供精细的QoS管理机制,真正做到“按需分配,保证质量”。Realize the linkage control from the user's home router, building switch, user group switch to the community switch (OLT), and join the virtualization server to provide virtualized desktop services for home users, and use a "brain" (SDN controller) to achieve The global control of each network device in the residential community adopts a hierarchical QoS policy to realize resource allocation and scheduling within the global scope of the network, providing users with a fine QoS management mechanism, truly achieving "on-demand allocation and quality assurance."
附图说明DRAWINGS
图1为本发明实施例所述的基于SDN的住宅小区网络控制系统的网络拓扑图;1 is a network topology diagram of an SDN-based residential cell network control system according to an embodiment of the present invention;
图2为家庭网络服务终端的功能模块图;2 is a functional block diagram of a home network service terminal;
图3为家庭网络服务终端中网络连接模块的功能结构图;3 is a functional structural diagram of a network connection module in a home network service terminal;
图4为OpenFlow交换机的流表示例;4 is a flow representation of an OpenFlow switch;
图5为数据包在交换机内的处理流程图。Figure 5 is a flow chart of the processing of data packets in the switch.
具体实施方式detailed description
下面结合附图对本发明的具体实施方式进行描述,以便本领域的技术人员更好地理解本发明。需要特别提醒注意的是,在以下的描述中,当已知功能和设计的详细描述也许会淡化本发明的主要内容时,这些描述在这里将被忽略。The specific embodiments of the present invention are described below in conjunction with the drawings in order to provide a better understanding of the invention. It is to be noted that in the following description, when a detailed description of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted herein.
如图1所示,一种基于SDN的住宅小区网络控制系统,包括m个家庭网络服务终端101、楼栋交换机102或用户组交换机103、小区交换机(OLT)104、虚拟化服务器105、SDN控制器106以及运营商宽带网络108。图1中的用户设备107表示家庭网络服务终端101连接的不同网络设备即家庭内部的网络连接,为了图面的简洁,只有第m个家庭网络服务终端101画出了n个用户设备107,其他家庭网络服务终端101连接的用户设备107未画出。As shown in FIG. 1, an SDN-based residential cell network control system includes m home network service terminals 101, a building switch 102 or a subscriber group switch 103, a cell switch (OLT) 104, a virtualization server 105, and an SDN control. The router 106 and the operator broadband network 108. The user equipment 107 in FIG. 1 represents a network connection of different network devices connected to the home network service terminal 101, that is, a home network. For the sake of simplicity of the drawing, only the mth home network service terminal 101 draws n user equipments 107, and the others The user equipment 107 connected to the home network service terminal 101 is not shown.
家庭网络服务终端101用于代替家庭中现有的路由器,其包含两个WAN口,一个用于连接现有的运营商宽带网络108,另一个用于通过小区交换机104、楼栋交换机102或用户组交换机103连接虚拟化服务器105。家庭网络服务终端101支持OpenFlow协议,接收SDN控制器106下发的QoS策略,为家庭内部 的网络连接分配带宽资源,提供QoS保障。The home network service terminal 101 is used to replace an existing router in the home, which includes two WAN ports, one for connecting to the existing carrier broadband network 108 and the other for connecting through the cell switch 104, the building switch 102 or the user. The group switch 103 is connected to the virtualization server 105. The home network service terminal 101 supports the OpenFlow protocol and receives the QoS policy delivered by the SDN controller 106 for the home interior. The network connection allocates bandwidth resources and provides QoS guarantee.
楼栋交换机102、用户组交换机103和小区交换机104为支持OpenFlow协议的交换机设备。一个楼栋交换机102可连接一个楼栋内的多个家庭网络服务终端101,并将家庭网络服务终端101的数据包通过合适的端口转发到所属小区交换机104。楼栋交换机102接收SDN控制器106下发的QoS策略,为连接到其上的所有家庭网络服务终端101提供QoS保障。更进一步,如果不是从用户所在的位置考虑,而是根据用户的属性考虑,可以将楼栋交换机102改造为用户组交换机103,用户组交换机103可以连接具有相同属性的用户的家庭网络服务终端101,比如,定制了相同资费套餐的用户属于同一个用户组。用户组交换机103接收所述SDN控制器106下发的QoS策略,为连接到其上的所有用户提供QoS保障。在规模较小的网络中,楼栋交换机102和用户组交换机103是可选设备,也可以直接由小区交换机104完成其功能。The building switch 102, the subscriber group switch 103, and the cell switch 104 are switch devices that support the OpenFlow protocol. A building switch 102 can connect a plurality of home network service terminals 101 in a building and forward the data packets of the home network service terminal 101 to the associated cell switch 104 through the appropriate ports. The building switch 102 receives the QoS policy delivered by the SDN controller 106, and provides QoS guarantee for all the home network service terminals 101 connected thereto. Further, if it is not considered from the location of the user, but based on the attribute of the user, the building switch 102 can be transformed into the user group switch 103, and the user group switch 103 can connect the home network service terminal 101 of the user having the same attribute. For example, users who have customized the same tariff package belong to the same user group. The user group switch 103 receives the QoS policy delivered by the SDN controller 106 and provides QoS guarantee for all users connected thereto. In a smaller network, the building switch 102 and the subscriber group switch 103 are optional devices, and the functions of the cell switch 104 can be directly implemented.
小区交换机104是住宅小区内最靠近骨干网的设备在目前主流的光纤网络环境下,根据小区的规模,小区交换机104既可以是一般的网络交换机,还可以是光线路终端(Optical Line Terminal,OLT)。小区交换机104支持OpenFlow协议,接收SDN控制器106的下发的QoS策略,为不同的楼栋交换机102或用户组交换机103提供不同的QoS保障,在不存在楼栋交换机102和用户组交换机103的情况下,则小区交换机104直接连接家庭网络服务终端101,通过接收SDN控制器106下发的QoS策略,为不同的家庭网络服务终端101提供QoS保障。The cell switch 104 is the closest to the backbone network in the residential cell. In the current mainstream optical network environment, the cell switch 104 can be either a general network switch or an optical line terminal (OLT) according to the size of the cell. ). The cell switch 104 supports the OpenFlow protocol, and receives the QoS policy delivered by the SDN controller 106 to provide different QoS guarantees for different building switches 102 or user group switches 103. In the absence of the building switch 102 and the user group switch 103, In this case, the cell switch 104 directly connects to the home network service terminal 101, and provides QoS guarantee for different home network service terminals 101 by receiving the QoS policy delivered by the SDN controller 106.
虚拟化服务器105用于向小区内家庭用户提供虚拟化桌面服务,一台虚拟化服务器105中可虚拟出多台虚拟机109,每一台虚拟机109对应连接一个家庭网络服务终端101。虚拟化服务器105通过专门的网络线路连接Internet,家庭网络服务终端101将用户发出的虚拟桌面连接请求通过楼栋交换机102和小区交换机104发送到虚拟化服务器105。虚拟化服务器105安装Open vSwitch,支持OpenFlow协议,接收SDN控制器106下发的QoS策略,为不同的虚拟化桌面连接提供QoS保障。The virtualization server 105 is configured to provide a virtualized desktop service to a home user in the cell. A plurality of virtual machines 109 can be virtualized in a virtualized server 105, and each virtual machine 109 is connected to a home network service terminal 101. The virtualization server 105 connects to the Internet through a dedicated network line, and the home network service terminal 101 sends a virtual desktop connection request issued by the user to the virtualization server 105 through the building switch 102 and the cell switch 104. The virtualization server 105 installs an Open vSwitch, supports the OpenFlow protocol, and receives QoS policies issued by the SDN controller 106 to provide QoS guarantee for different virtualized desktop connections.
SDN控制器106是整个住宅小区网络的控制中心,其根据管理员定义的规则,结合用户属性和当前网络的流量状况,将QoS策略制定成流表,动态地向 向家庭网络服务终端101、楼栋交换机102或用户组交换机103、小区交换机104和虚拟化服务器105下发流表,从而自上而下地为用户的每一个网络连接分配网络带宽资源,并提供QoS保障。具体而言:1)其向所述家庭网络服务终端101下发流表,为家庭内的各个不同的网络连接提供QoS保障;2)其向所述楼栋交换机102下发流表,为连接到指定楼栋交换机102的各个不同的家庭网络服务终端101提供QoS保障;3)其向所述用户组交换机103下发流表,为连接到指定用户组交换机103的各个家庭网络服务终端101提供QoS保障;4)其向所述小区交换机104下发流表,为连接到指定小区交换机的各个家庭网络服务终端101、或楼栋交换机102、或用户组交换机103提供QoS保障;5)其向所述虚拟化服务器105中的Open vSwitch下发流表,为指定虚拟化服务器105中的各个虚拟机109提供QoS保障。The SDN controller 106 is a control center of the entire residential cell network, and according to the rules defined by the administrator, combined with the user attributes and the current network traffic status, the QoS policy is formulated into a flow table, and dynamically A flow table is sent to the home network service terminal 101, the building switch 102 or the subscriber group switch 103, the cell switch 104, and the virtualization server 105, thereby allocating network bandwidth resources for each network connection of the user from top to bottom, and providing QoS. Guarantee. Specifically: 1) it sends a flow table to the home network service terminal 101 to provide QoS guarantee for different network connections in the home; 2) it sends a flow table to the building switch 102 for connection Each of the different home network service terminals 101 to the designated building switch 102 provides QoS guarantee; 3) it sends a flow table to the subscriber group switch 103 to provide for each home network service terminal 101 connected to the designated subscriber group switch 103. QoS guarantee; 4) sending a flow table to the cell switch 104, providing QoS guarantee for each home network service terminal 101, or the building switch 102, or the user group switch 103 connected to the designated cell switch; 5) The Open vSwitch in the virtualization server 105 sends a flow table to provide QoS guarantee for each virtual machine 109 in the designated virtualization server 105.
为每一个家庭用户提供一个家庭网络服务终端101,该终端至少应包含图2所示的功能模块。在本发明中,只关注网络部署和控制部分,所以将家庭网络服务终端101简单地抽象为一个虚拟化桌面服务模块201和一个网络设备连接模块202。其中,虚拟化桌面服务模块201用于向用户提供虚拟化桌面服务,包括虚拟桌面的显示和用户的交互等。网络设备连接模块202用于为虚拟化桌面服务模块201提供网络连接支持。在本发明所公开的方案中,由于家庭网络服务终端101是用户端的唯一设备,所以,网络设备连接模块202提供了有线网络接入模块203、无线网络接入模块204和路由模块205,以提供相应的功能。同时,为了能完成平滑的过渡,使用户在接入了虚拟化桌面服务后能继续使用原有的网络连接,网络设备连接模块配置202两个WAN口206,其中一个WAN口用于接入用户原有的运营商宽带网络108,另一个WAN口用于连接虚拟化服务器105。A home network service terminal 101 is provided for each home user, and the terminal should at least include the functional modules shown in FIG. 2. In the present invention, only the network deployment and control portion is concerned, so the home network service terminal 101 is simply abstracted as a virtualized desktop service module 201 and a network device connection module 202. The virtualized desktop service module 201 is configured to provide a virtualized desktop service to the user, including display of the virtual desktop and interaction of the user. The network device connection module 202 is configured to provide network connection support for the virtualized desktop service module 201. In the solution of the present disclosure, since the home network service terminal 101 is the only device of the user end, the network device connection module 202 provides the wired network access module 203, the wireless network access module 204, and the routing module 205 to provide The corresponding function. At the same time, in order to complete the smooth transition, the user can continue to use the original network connection after accessing the virtualized desktop service, and the network device connection module configures 202 two WAN ports 206, one of which is used for accessing the user. The original carrier broadband network 108, another WAN port is used to connect to the virtualization server 105.
一个家庭网络服务终端101上可存在多路网络连接,比如不同的网页浏览连接,下载连接,邮件连接和虚拟化桌面服务连接等。同时,这些连接又可以是通过不同的用户设备109创建的,比如手机,平板等。显然,这些网络连接既可以通过有线接入方式,又可以通过无线接入方式。所有的连接都通过网络设备连接模块202转发到对应的网络出口。There may be multiple network connections on a home network service terminal 101, such as different web browsing connections, download connections, mail connections, and virtualized desktop service connections. At the same time, these connections can be created by different user devices 109, such as mobile phones, tablets, and the like. Obviously, these network connections can be made either by wired access or by wireless access. All connections are forwarded through the network device connection module 202 to the corresponding network exit.
所述网络设备连接模块202的功能除了转发网络分组外,还为每一个网络 连接提供QoS保障。具体而言,网络设备连接模块202支持OpenFlow协议,其转发规则由SDN控制器106统一下发。网络设备连接模块202的结构拓扑如图3所示。其内部由数据平面301,转发平面302和控制平面303组成,并对外提供管理接口304。其中,控制平面303指OpenFlow Controller 305,其与SDN控制器106交互控制指令,向SDN控制器106发送本机状态,并接收SDN控制器106下发的流表;转发平面302负责完成数据报的封装和转发,转发平面302包括有线接入模块203、无线接入模块204和两个WAN口206。在本发明公开的方案中,有线接入模块203有N(N为大于1的正整数)个LAN口306,LAN口306用于连接用户家庭里的各种设备。数据平面301是网络设备连接模块202的核心部分,通过OpenFlow control port 308接收OpenFlow Controller 305的控制指令,并根据流表307中的内容决定对接收到的数据的操作,这些操作主要有:从指定端口转发、进入队列、修改字段和丢弃。数据平面301中的流表307是一些规则项的集合,定义了一些规则和对应的操作。The function of the network device connection module 202 is not only forwarding network packets but also for each network. The connection provides QoS guarantees. Specifically, the network device connection module 202 supports the OpenFlow protocol, and the forwarding rules are uniformly delivered by the SDN controller 106. The structural topology of the network device connection module 202 is as shown in FIG. The internal part is composed of a data plane 301, a forwarding plane 302 and a control plane 303, and provides a management interface 304. The control plane 303 refers to the OpenFlow Controller 305, which interacts with the SDN controller 106 to control the command, sends the local state to the SDN controller 106, and receives the flow table sent by the SDN controller 106. The forwarding plane 302 is responsible for completing the datagram. For encapsulation and forwarding, the forwarding plane 302 includes a wired access module 203, a wireless access module 204, and two WAN ports 206. In the solution disclosed by the present invention, the wired access module 203 has N (N is a positive integer greater than 1) LAN ports 306, and the LAN port 306 is used to connect various devices in the user's home. The data plane 301 is a core part of the network device connection module 202. The OpenFlow control port 308 receives the control command of the OpenFlow Controller 305, and determines the operation of the received data according to the content in the flow table 307. These operations mainly include: Port forwarding, entering queues, modifying fields, and dropping. The flow table 307 in the data plane 301 is a collection of some rule items, defining some rules and corresponding operations.
一个典型的通用流表结构如图4所示,包括匹配域401,动作项402和统计项403,匹配域401是与接收到的报文进行头部信息匹配的字段,比如端口号和IP地址等;动作项402是完成匹配后对应的操作,比如直接转发,入队和丢弃等;统计项403用于记录完成某项匹配的次数。当一个数据包进入数据平面301后,网络设备连接模块202会按照图5所示的流程对数据包进行处理,即在501操作中,将数据包的头部信息与流表逐项匹配,一旦匹配,则502操作中,按照流表中的动作项,更新该条记录所对应的动作集合,更新元数据,当所有流表匹配完以后,503操作将执行动作集合中的相关动作。A typical general flow table structure is shown in FIG. 4, and includes a matching field 401, an action item 402, and a statistic item 403. The matching field 401 is a field that matches the received message with the header information, such as a port number and an IP address. The action item 402 is a corresponding operation after completing the matching, such as direct forwarding, enqueue, and discard, etc.; the statistical item 403 is used to record the number of times a certain match is completed. After a data packet enters the data plane 301, the network device connection module 202 processes the data packet according to the process shown in FIG. 5, that is, in the 501 operation, the header information of the data packet is matched with the flow table item by item. Matching, in the 502 operation, according to the action item in the flow table, the action set corresponding to the record is updated, and the metadata is updated. When all the flow tables are matched, the 503 operation performs the related action in the action set.
综上所述,本发明具有以下特点:In summary, the present invention has the following features:
1、本发明基于SDN的思想,提供了一种小区网络的部署与管理方案,实现从用户家庭服务终端,楼栋交换机,用户组交换机到小区交换机(OLT)的联动控制,同时,虚拟化桌面服务器为家庭用户提供了虚拟化桌面服务,并且使用一个“大脑”(SDN控制器)实现住宅小区内各个网络设备的全局控制,通过将路由器(交换机)中的转发面和控制面分离,可以在不同的应用场景为用户(用户组)提供更优质的服务。1. The invention is based on the idea of SDN, and provides a scheme for deploying and managing a cell network, which realizes linkage control from a user home service terminal, a building switch, a user group switch to a cell switch (OLT), and simultaneously virtualizes the desktop. The server provides a virtualized desktop service for home users, and uses a "brain" (SDN controller) to achieve global control of each network device in the residential cell. By separating the forwarding plane and the control plane in the router (switch), Different application scenarios provide better services for users (user groups).
2、基于本发明所提出的网络部署,通过对虚拟化服务器的QoS管理,可以 为不同的用户提供精细化的QoS保障,甚至可以将用户分组,通过用户组交换机或楼栋交换机为不同的用户组提供不同的QoS保障。2. Based on the network deployment proposed by the present invention, by QoS management of the virtualized server, Provides refined QoS guarantee for different users, and even groups users, providing different QoS guarantees for different user groups through user group switches or building switches.
3、通过精细化的QoS为用户提供更稳定的虚拟化桌面服务,同时统一管理用户原有的带宽资源。本发明以面向虚拟化桌面服务为例来说明,但是其原理可以使用到虚拟化桌面服务外的其他专用网络服务上,比如游戏和多媒体等。3. Provide users with more stable virtualized desktop services through refined QoS, and uniformly manage the original bandwidth resources of users. The present invention is described by taking a virtualized desktop service as an example, but the principle can be applied to other dedicated network services other than virtualized desktop services, such as games and multimedia.
尽管上面对本发明说明性的具体实施方式进行了描述,以便于本技术领域的技术人员理解本发明,但应该清楚,本发明不限于具体实施方式的范围,对本技术领域的普通技术人员来讲,只要各种变化在所附的权利要求限定和确定的本发明的精神和范围内,这些变化是显而易见的,一切利用本发明构思的发明创造均在保护之列。 While the invention has been described with respect to the preferred embodiments of the present invention, it is understood that the invention These variations are obvious as long as the various changes are within the spirit and scope of the invention as defined and claimed in the appended claims.

Claims (6)

  1. 一种基于SDN的住宅小区网络控制系统,其特征在于,还包括多个家庭网络服务终端、小区交换机、虚拟化服务器和SDN控制器;An SDN-based residential cell network control system, characterized in that it further comprises a plurality of home network service terminals, a cell switch, a virtualization server and an SDN controller;
    所述多个家庭网络服务终端,分别用于代替住宅小区内各个家庭中现有的路由器,家庭网络服务终端包含两个WAN(Wide Area Network,广域网)口,一个连接到现有的运营商宽带网络,另一个通过小区交换机连接到虚拟化服务器,家庭网络服务终端接收SDN控制器下发的QoS策略,为家庭内部的网络连接分配带宽资源,提供QoS保障;The plurality of home network service terminals are respectively used to replace existing routers in each home in the residential cell, and the home network service terminal includes two WAN (Wide Area Network) ports, and one is connected to the existing carrier broadband. The network is connected to the virtualization server through the cell switch, and the home network service terminal receives the QoS policy delivered by the SDN controller, allocates bandwidth resources for the internal network connection of the home, and provides QoS guarantee;
    所述小区交换机,用于将各个家庭中的家庭网络服务终端连接到虚拟化服务器,并接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供QoS保障;The cell switch is configured to connect the home network service terminal in each home to the virtualization server, and receive the QoS policy delivered by the SDN controller to provide QoS guarantee for different home network service terminals;
    所述虚拟化服务器通过专门的网络线路连接Internet(互联网),用于向住宅小区内各个家庭通过小区交换机、家庭网络服务终端提供虚拟化桌面服务,同时,虚拟化服务器接收SDN控制器下发的QoS策略,为不同的虚拟化桌面连接提供QoS保障;The virtualization server is connected to the Internet (Internet) through a dedicated network line, and is used to provide virtualized desktop services to the homes in the residential cell through the cell switch and the home network service terminal. At the same time, the virtualization server receives the SDN controller. QoS policy to provide QoS guarantee for different virtualized desktop connections;
    所述SDN控制器,是整个住宅小区网络的控制中心,QoS策略以流表的形式体现,SDN控制器根据住宅小区网络的当前状况动态地向家庭网络服务终端、小区交换机和虚拟化服务器下发流表,自上而下地为用户的每一个网络连接分配网络带宽资源,并提供QoS保障。The SDN controller is a control center of the entire residential cell network, and the QoS policy is embodied in the form of a flow table. The SDN controller dynamically delivers the information to the home network service terminal, the cell switch, and the virtualization server according to the current status of the residential cell network. The flow table allocates network bandwidth resources for each network connection of the user from top to bottom and provides QoS guarantee.
  2. 根据权利要求1所述的基于SDN的住宅小区网络控制系统,其特征在于,还包括楼栋交换机,用于连接楼栋内的各个家庭网络服务终端,然后通过小区交换机再连接到虚拟化服务器;SDN控制器根据住宅小区网络的当前状况动态地向楼栋交换机下发QoS策略,楼栋交换机接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供不同的QoS保障。The SDN-based residential cell network control system according to claim 1, further comprising a building switch for connecting each home network service terminal in the building, and then connecting to the virtualization server through the cell switch; The SDN controller dynamically sends a QoS policy to the building switch according to the current status of the residential cell network, and the building switch receives the QoS policy delivered by the SDN controller to provide different QoS guarantees for different home network service terminals.
  3. 根据权利要求1所述的基于SDN的住宅小区网络控制系统,其特征在于,包括用户组交换机,用于将具有相同属性的家庭用户的家庭网络服务终端连接到一起,然后通过小区交换机再连接到虚拟化服务器,同时SDN控制器根据住宅小区网络的当前状况动态地向楼栋交换机下发QoS策略,用户组交换机接收SDN控制器下发的QoS策略,为不同的家庭网络服务终端提供不同的QoS 保障。The SDN-based residential cell network control system according to claim 1, comprising a subscriber group switch for connecting home network service terminals of home users having the same attribute, and then reconnecting through the cell switch The QoS controller dynamically delivers the QoS policy to the building switch according to the current status of the residential network, and the user group switch receives the QoS policy delivered by the SDN controller to provide different QoS for different home network service terminals. Guarantee.
  4. 根据权利要求2所述的基于SDN的住宅小区网络控制系统,其特征在于,所述家庭网络服务终端、楼栋交换机、小区交换机和虚拟化服务器均支持OpenFlow协议。The SDN-based residential cell network control system according to claim 2, wherein the home network service terminal, the building switch, the cell switch, and the virtualization server support the OpenFlow protocol.
  5. 根据权利要求3所述的基于SDN的住宅小区网络控制系统,其特征在于,所述家庭网络服务终端、用户组交换机、小区交换机和虚拟化服务器均支持OpenFlow协议。The SDN-based residential cell network control system according to claim 3, wherein the home network service terminal, the user group switch, the cell switch, and the virtualization server support the OpenFlow protocol.
  6. 根据权利要求1所述的基于SDN的住宅小区网络控制系统,其特征在于,所述虚拟化服务器能虚拟出多个虚拟机,不同的虚拟机具有不同的IP地址,不同的家庭网络服务终端通过IP地址来访问指定的虚拟机,以便提供虚拟化桌面服务,所述虚拟化服务器安装Open vSwitch,Open vSwitch支持OpenFlow协议。 The SDN-based residential cell network control system according to claim 1, wherein the virtualization server can virtualize a plurality of virtual machines, different virtual machines have different IP addresses, and different home network service terminals pass The IP address is used to access the specified virtual machine to provide a virtualized desktop service. The virtualized server installs an Open vSwitch, and the Open vSwitch supports the OpenFlow protocol.
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