WO2012100716A1 - Procédé et appareil permettant de réaliser une fonction de passerelle résidentielle dans un réseau optique passif - Google Patents

Procédé et appareil permettant de réaliser une fonction de passerelle résidentielle dans un réseau optique passif Download PDF

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Publication number
WO2012100716A1
WO2012100716A1 PCT/CN2012/070598 CN2012070598W WO2012100716A1 WO 2012100716 A1 WO2012100716 A1 WO 2012100716A1 CN 2012070598 W CN2012070598 W CN 2012070598W WO 2012100716 A1 WO2012100716 A1 WO 2012100716A1
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WIPO (PCT)
Prior art keywords
entity
address
terminal device
network address
packet
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PCT/CN2012/070598
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English (en)
Chinese (zh)
Inventor
秦遵明
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中兴通讯股份有限公司
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Publication of WO2012100716A1 publication Critical patent/WO2012100716A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/25—Mapping addresses of the same type
    • H04L61/2503—Translation of Internet protocol [IP] addresses
    • H04L61/2514—Translation of Internet protocol [IP] addresses between local and global IP addresses

Definitions

  • the present invention relates to the field of passive optical network technologies, and in particular, to a method and apparatus for implementing a home gateway function in a passive optical network.
  • Passive Optical Network is a pure medium network, which uses point-to-multipoint optical fiber transmission and access technology. It can be composed of downlink broadcast mode and uplink time division multiple access mode. Treetop, star, and bus-type topologies do not require node devices at the optical branch point, only need to install a simple optical splitter, thus saving fiber cable resources, sharing bandwidth resources, saving room investment, and equipment security. High performance, fast network construction, and low cost of integrated network construction.
  • Passive optical networks are designed to avoid the electromagnetic interference and lightning effects of external equipment, reduce the failure rate of lines and external equipment, improve system reliability, and save maintenance costs. This is a long-awaited technology for telecom maintenance departments.
  • Passive optical networks mainly include Gigabit-Capable Passive Optical Network (GPON), Ethernet Passive Optical Network (EPON), and Next Generation Passive Optical Network (Next Generation Passive Optical Network). , NGPON ) and Wavelength Division Multiplexing Passive Optical Network (WPON).
  • the PON network structure includes an optical line terminal (OLT) and an optical network unit (ONU).
  • OLT optical line terminal
  • ONU optical network unit
  • the OLT is placed in the equipment room, and the ONU is placed in the corridor or home according to different application scenarios.
  • the ONU is the terminal at the service provider facility.
  • the ONU provides a fan-out connection to the user.
  • Each PON trunk can support up to 32 splits and
  • the function of the home gateway is completed by the ONU, but A large number of ONUs are deployed in the source optical network, and the home gateway function is implemented by using the ONU, which will greatly increase the network deployment cost, and also cause a problem that a large number of ONUs are difficult to manage and maintain.
  • the technical problem to be solved by the present invention is to provide a method and apparatus for implementing a home gateway function in a passive optical network, which solves the problem of high network deployment cost and difficulty in maintenance caused by the implementation of the home gateway function by the optical network unit.
  • the present invention provides a method for implementing a home gateway function in a passive optical network, including:
  • a virtual remote gateway is disposed in the optical line terminal, and the virtual remote gateway is connected to the optical network unit, configured to configure a public network address, allocate a private network address, and implement a text forwarding for the terminal device under the optical network unit. Further, the virtual remote gateway is provided with a plurality of service outlets, and the service outlets are connected to a routing forwarding entity corresponding to the services supported by the services.
  • the step of configuring the public network address for the terminal device by the virtual remote gateway includes: the virtual remote gateway performs dialing, selects a service exit according to the service type of the terminal device, and passes the corresponding route through the selected service outlet. Forward the entity to apply for a public network address to the routing server connected to the routing forwarding entity; or manually configure a static IP address.
  • the step of the virtual remote gateway assigning a private network address to the terminal device includes: the terminal device initiating an address request to the virtual remote gateway, where the virtual remote gateway receives the address request of the terminal device The private network address in the network segment is allocated to the terminal device according to the network segment configured by the user, and the private network address is fed back to the terminal device.
  • the step of the virtual remote gateway implementing the packet forwarding for the terminal device includes: after receiving the first packet of the terminal device, the virtual remote gateway performs export encapsulation on the first packet, and establishes a control connection. Sending the first packet to the corresponding routing and forwarding entity according to the destination address of the first packet, and sending the first packet to the uplink device by using the routing forwarding entity.
  • the method further includes: after the first remote message is sent to the corresponding routing and forwarding entity, the virtual remote gateway further establishes a routing forwarding table, and records a source address of the first packet in the routing forwarding table.
  • the method further includes: after the virtual remote gateway establishes the routing forwarding table, after receiving the response message of the uplink device, querying the destination address and the destination port according to the response packet
  • the routing and forwarding table is configured to find the destination address of the response and the private network address and the destination port corresponding to the destination port, and send the response packet to the terminal device.
  • the method further includes: when the virtual remote gateway receives the normal packet after the first packet sent by the terminal device, performing the accelerated forwarding of the normal packet according to the routing forwarding table.
  • the present invention also provides an apparatus for implementing a home gateway function in a passive optical network, comprising: a virtual remote gateway, the virtual remote gateway being connected to the optical network unit, wherein: the virtual remote gateway includes:
  • a public network address configuration entity configured to configure a public network address for the terminal device under the optical network unit
  • a private network address allocation entity configured to allocate a private network address for the terminal device under the optical network unit
  • an address The conversion/routing entity is configured to implement packet forwarding for the terminal device under the optical network unit.
  • the public network address configuration entity is configured to configure the public network address in the following manner: performing dialing, selecting a service outlet according to the service type of the terminal device, and forwarding the entity through the corresponding route through the selected service outlet.
  • the routing server connected to the routing forwarding entity applies for a public network address; or
  • the static IP address is manually configured by the user.
  • the private network address allocation entity is configured to allocate the private network address in the following manner: after receiving the address request of the terminal device, assigning the network to the terminal device according to the network segment configured by the user The private network address in the segment, and the private network address is fed back to the terminal device.
  • address translation/routing entity is configured to implement packet forwarding in the following manner:
  • the first packet After receiving the first packet of the terminal device, the first packet is egress-encapsulated, and the first packet is sent to the uplink device.
  • the virtual remote gateway further includes: a hardware acceleration entity
  • the address translation/routing entity is further configured to establish a routing forwarding table, in which the source address of the first packet and the source port are forwarded to the public network address of the terminal device, and the first packet is forwarded. a mapping relationship between the service outlets, and the routing forwarding table is sent to the hardware acceleration entity, where the source address and the source port are respectively a private network address and a text sending port of the terminal device;
  • the hardware acceleration entity is configured to accelerate the normal packet according to the routing forwarding table sent by the address translation/routing entity when receiving the normal packet after the first packet sent by the terminal device Forward.
  • the public network address configuration entity includes: a dynamic host protocol configuration client entity and a point-to-point dialing client entity; and the private network address assignment entity is a dynamic host protocol configuration server entity.
  • the present invention eliminates the need for each of the home gateway functions on the OLT.
  • the ONU provides this function.
  • the ONU only implements the access interface function, which greatly reduces the cost of the ONU, enhances the versatility, and facilitates the large-scale deployment of services. In addition, it is no longer necessary to perform a home gateway for each ONU.
  • Business configuration reduces the operating costs of the business.
  • FIG. 1 is a schematic diagram of networking of a passive optical network in the prior art
  • FIG. 2 is an application of a method for implementing a home gateway function in a passive optical network according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a virtual remote gateway in a method for implementing a home gateway function in a passive optical network according to an embodiment
  • FIG. 4 is a flow chart of a method for implementing a home gateway function in a passive optical network according to an embodiment of the present invention.
  • a virtual remote gateway is configured in the optical line terminal, and the virtual remote gateway configures a public network address, allocates a private network address, and implements packet forwarding for the terminal device under the optical network unit.
  • a virtual remote gateway (VRG) corresponding to an optical network unit (ONU) is configured, and a corresponding virtual remote gateway can be configured for each ONU in the OLT, and one virtual remote gateway provides an ONU.
  • One or more virtual remote gateways can also be configured in the OLT, and one virtual remote gateway provides services for multiple ONUs.
  • a plurality of service outlets are set on the virtual remote gateway, and each service outlet is connected to a routing forwarding entity corresponding to the service supported by the service outlet.
  • routing and forwarding entities include: High Speed Internet (HSI) bridge, Video On Demand (VOD) forwarding entity and voice service (VOICE) forwarding entity.
  • the VRG includes the following entities: a public network address configuration entity, a private network address assignment entity, a network address translation (Nat)/router entity, and a hardware acceleration (Hardware Acceleration) entity.
  • the network address allocation entity may be a dynamic host configuration protocol (DHCP) server entity.
  • the public network address configuration entity may configure a static public network address for the terminal device, or apply for a public network address for the terminal device.
  • DHCP Dynamic Host Protocol Configuration
  • PPOE Point-to-Point Protocol over Ethernet
  • a DHCP server entity is used to assign an IP address to all users on the user-side ONU, which is usually a private network IP address.
  • a DHCP client entity is used by the network to obtain an IP address from a DHCP server (router) for a specific service, usually a public network IP address.
  • the PPPOE client entity is used by the network side to obtain an IP address from a Broadband Remote Access Server (BRAS) of a specific service, usually a public network IP address.
  • BRAS Broadband Remote Access Server
  • the Nat/Routing entity is used to forward data packets of the user side to the network side in software, and complete functions such as address translation and route forwarding.
  • the hardware acceleration entity is used to forward data packets of the user side to the network side by hardware acceleration, and complete functions such as address translation and route forwarding. Since the addresses allocated by different services are not the same, you need to use the DHCP client or PPPOE client to obtain the network side address.
  • FIG. 4 is a schematic diagram of a method for implementing a home gateway function according to the embodiment, including:
  • Step 401 The terminal device accesses the ONU, and accesses the OLT through the default virtual local area network (VLAN) of the ONU.
  • VLAN virtual local area network
  • Step 402 The user completes the service configuration, including enabling the DHCP server and setting a network segment of the private network address to be allocated;
  • the VRG and the network side include various service exports, such as High Speed Internet (HSI) services, Video On Demand (VOD) services, and voice (VOICE) services.
  • the network needs to divide services and configure different client dialing modes for services, such as DHCP client dialing mode or PPPOE client dialing mode.
  • Step 403 The ONU enables the VRG function, and triggers the PPPOE client or the DHCP client of the VRG corresponding to the ONU to perform PPPOE or DHCP dialing, according to the service class of the terminal device.
  • Step 404 The terminal device under the ONU initiates the DHCP address application, from the VRG The DHCP server obtains the internal private network address.
  • Step 405 The DHCP server allocates the private network address in the configured network segment to the terminal device according to the network segment configured by the user, and feeds the private network address to the terminal device.
  • Step 406 ONU The terminal device performs the service and sends the first packet to the OLT.
  • the source address of the first packet is the private network address of the terminal device.
  • the services include high-speed Internet access, VOD, and VOICE.
  • Step 407 After receiving the first packet of the user, the OLT performs egress encapsulation on the first packet, and establishes a control connection.
  • the Nat/routing entity performs routing according to the destination IP address, and forwards the packet to the corresponding routing and forwarding entity.
  • Step 408 The Nat/Routing entity establishes a routing forwarding table, and records the mapping between the source address of the first packet and the source port to the public network address and the packet forwarding port, and sends the established routing forwarding table to the hardware acceleration entity.
  • the source address and the source port are respectively the private network address of the terminal device and the sending port of the terminal device.
  • Step 409 The routing and forwarding entity sends the packet to the uplink device through routing or bridging.
  • Step 410 The OLT receives the uplink device. After the response packet, the response packet is sent to the VRG by the route forwarding entity.
  • Step 411 The Nat/route entity of the VRG queries the routing forwarding table according to the destination address and the destination port of the response packet, and finds the corresponding private network address and The transmission port is sent to the terminal device.
  • Step 412 After the normal message sent by the terminal device is sent to the OLT, the hardware acceleration entity on the OLT performs acceleration forwarding according to the routing forwarding table.
  • the ONU disables the VRG operation, notifies the VRG service control module, and triggers the ONU.
  • the VRG performs the PPPOE/DHCP offline and releases the IP address.
  • the OLT is connected to the three ONUs, the ONU1, the ONU2, and the ONU3.
  • the users accessing each ONU include the PC Internet service, the set top box (STB) video service, and the Session Initiation Protocol (SIP). Client voice service.
  • STB set top box
  • SIP Session Initiation Protocol
  • Each ONU accesses the 0LT through a specific VLAN.
  • Each ONU corresponds to an independent VRG on the 0LT.
  • Each VRG implements services including Internet access, video, and voice, and is connected to each other through bridging or routing. Connect to the server.
  • Step a The user completes the VRG service configuration, which mainly includes setting an address segment allocated by the VRG side, such as 192.1.1.2-192.1.1.254;
  • Step b After the VRG function is enabled, 0NU1 triggers the PPP0E client entity or the DHCP client entity corresponding to VRG1 to dial the number and apply for the public network IP address.
  • the public network address obtained by the PPPOE dial-up from the Broadband Remote Access Server is 1.1.1.1
  • the public network address obtained by the VOD service dialing is 10.40.1.2
  • the public network address obtained by dialing the VOICE service Is 172.26.1.1.
  • step c the actual user (PCI 1 ) in ONU1 initiates a DHCP address request, and obtains the internal private network address from the DHCP server entity in VRG1, assuming that the internal private network address is 192.1.1.2;
  • Step d The actual user under ONU1 (PC11) The high-speed Internet access is performed, and the first packet is sent to the OLT.
  • the destination address of the packet is 2.2.1.1
  • the source address is the private network address 192.1.1.2
  • the source TCP port is 1234.
  • Step e After receiving the first packet of the PC11, the OLT performs software processing by the Vat Nat/Route entity, and the egress of the first packet is encapsulated into a PPPOE encapsulation, and the encapsulation VLAN is vlan400.
  • the TCP control connection is established, according to the purpose Address 2.2.1.1, choose to send the first message from the Wide Area Network (WAN) interface 13 to the HSI bridge;
  • WAN Wide Area Network
  • Step f The Nat/Route entity establishes a routing forwarding table, records the source address 192.1.1.2, the mapping relationship between the source TCP port 1234 and the public network address 1.1.1.1, and the packet forwarding port 2345, and the established NAT forwarding table (192.1.1.2) , 1234 (TCP) 1.1.1.1, 2345 (TCP)) is delivered to the hardware acceleration entity;
  • the high-speed bridge module is not a VRG, and is a functional entity that the OLT has implemented.
  • Step g the OLT high-speed bridge module performs the Layer 2 bridging process according to the destination MAC address, sends it to the uplink port, and sends the response to the BRAS, and the BRAS gives a response;
  • Step h after the OLT receives the BRAS response message, the high-speed Internet access
  • the bridge module sends a Layer 2 bridge to the VRG according to the destination MAC address.
  • step i the Vat Nat/Route entity is based on the destination address of 1.1.1.1 and the destination port is 2345.
  • the routing forwarding table is searched and the route is found.
  • the destination IP address is 192.1.1.1.2 and the destination TCP port is 1234, which is sent from the corresponding user interface of VRG1.
  • Step j The normal packet of the PC11 user (refers to the data packet after the control connection is established) is sent to the OLT, and directly by the hardware acceleration module on the OLT according to the routing forwarding table (192.1.1.2/1234 ⁇ 1.1.1.1/2345 ) Speed up forwarding.
  • Other VOD/VOICE services are similar to Internet services and will not be described in detail here.
  • the ONU disables the VRG operation and notifies the VRG service control entity to trigger the VPP network side of the ONU to perform the offline operation of the PPPOE client entity/DHCP client entity to release the IP address.
  • modules and steps of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or their Multiple modules or steps are implemented as a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un procédé et un appareil permettant de réaliser des fonctions de passerelle résidentielle dans un réseau optique passif (PON). L'invention consiste à : disposer une passerelle distante virtuelle dans un terminal de ligne optique (OLT), la passerelle distante virtuelle (VRG) est connectée à une unité de réseau optique (ONU) et configure une adresse de réseau publique, alloue une adresse de réseau privée et expédie des paquets pour l'équipement terminal dépendant de l'unité de réseau optique. Suite à la réalisation de fonctions de passerelle résidentielle sur le terminal OLT, il n'est plus nécessaire à chaque unité ONU de fournir de telles fonctions, l'unité ONU réalise uniquement la fonction d'interface d'accès au réseau PON, ce qui diminue significativement les coûts des unités ONU, améliore la versatilité et facilite le déploiement à grande échelle de services de réseau PON. En outre, il n'est plus nécessaire d'effectuer une configuration du service de passerelle domestique pour chaque unité ONU, réduisant ainsi le coût opérationnel du service.
PCT/CN2012/070598 2011-01-28 2012-01-19 Procédé et appareil permettant de réaliser une fonction de passerelle résidentielle dans un réseau optique passif WO2012100716A1 (fr)

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CN201110031184.4A CN102082979B (zh) 2011-01-28 2011-01-28 在无源光网络中实现家庭网关功能的方法及装置
CN201110031184.4 2011-01-28

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CN115361605A (zh) * 2022-10-20 2022-11-18 武汉长光科技有限公司 虚拟域域内漫游方法、装置、设备和计算机可读存储介质

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