WO2012163039A1 - Procédé et dispositif de protection de communications - Google Patents

Procédé et dispositif de protection de communications Download PDF

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Publication number
WO2012163039A1
WO2012163039A1 PCT/CN2011/081739 CN2011081739W WO2012163039A1 WO 2012163039 A1 WO2012163039 A1 WO 2012163039A1 CN 2011081739 W CN2011081739 W CN 2011081739W WO 2012163039 A1 WO2012163039 A1 WO 2012163039A1
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WO
WIPO (PCT)
Prior art keywords
terminal node
port
identifier
uplink
wireless
Prior art date
Application number
PCT/CN2011/081739
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English (en)
Chinese (zh)
Inventor
刘雅宁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN2011800040821A priority Critical patent/CN102598587A/zh
Priority to PCT/CN2011/081739 priority patent/WO2012163039A1/fr
Publication of WO2012163039A1 publication Critical patent/WO2012163039A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of data communications, and more particularly to a method and apparatus for communication protection. Background technique
  • the link protection scheme between the optical line terminal (OLT, Opt ica l Line Termina l) and the optical network unit (ONU, Opt ica l Network Uni t) is to maintain a backup link between the OLT and the ONU. After the link is faulty, the service is switched to the standby link.
  • the 0LT passive optical network (PON, Pas ive Opt i ca l Network) port 0 and port 1 are active and standby
  • 0NU PON0 and P0N1 are active and standby
  • the network always maintains a standby link. When the primary link fails, 0LT and 0NU jointly switch services to the standby link. On, to protect user business.
  • the optical link between the P0N port, 0LT, and 0NU of the 0LT must be redundantly backed up.
  • the 0NU device does not have a backup P0N link available, service protection cannot be implemented.
  • EOC Ethernet over Coax
  • a problem to be solved by embodiments of the present invention is that the problem of service protection cannot be achieved when the primary terminal node has no available wired links.
  • the present invention provides a method of communication protection, including:
  • the standby terminal node receives the uplink radio packet from the radio port, where the uplink radio packet includes uplink data, the uplink data includes an exchange data identifier of the active terminal node, and the uplink radio packet includes the primary terminal node.
  • Wireless communication address ;
  • the uplink packet is sent from the wired port to the central office node, where the uplink packet includes the identifier of the standby terminal node and the uplink data.
  • the present invention provides a communication protection apparatus, including:
  • a radio port processing unit configured to receive an uplink radio packet, where the uplink radio packet includes uplink data, where the uplink data includes an exchange data identifier of the active terminal node, and the uplink radio packet
  • the text includes a wireless communication address of the primary terminal node
  • the wired port processing unit is configured to send an uplink packet to the central office node, where the uplink packet includes an identifier of the standby terminal node and the uplink data.
  • the present invention provides a communication protection system, including:
  • Alternate terminal node primary terminal node, central office node;
  • the active terminal node sends an uplink radio packet to the standby terminal node, where the uplink radio packet includes uplink data, and the uplink data includes an exchange data identifier of the active terminal node, and the uplink radio packet Including a wireless communication address of the primary terminal node;
  • the standby terminal node receives the uplink wireless packet from a wireless port
  • the standby terminal node sends an uplink packet from the wired port to the central office node, where the uplink packet includes an identifier of the standby terminal node and the uplink data.
  • the standby terminal node protects the service by adding a wired link through the wireless link.
  • Figure 1 is a schematic diagram of a P0N protection system
  • FIG. 2 is a schematic structural diagram of a network according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for communication protection according to an embodiment of the present invention.
  • 3a is a schematic flowchart of a method for communication protection according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a format of a communication protection protocol packet according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a device for communication protection according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a system for communication protection according to an embodiment of the present invention.
  • Embodiments of the present invention provide a method of communication protection, which is described below in conjunction with FIG.
  • 0NU is a terminal node
  • 0LT is a central office node
  • ONU0 is used as an active terminal node
  • ONUn is used as a backup terminal node
  • ONU0 and ONUn communicate with the same 0LT.
  • the wireless port of ONU0 can communicate wirelessly through wireless ports between various wireless networks and ONUn, such as WiFi (Wireless Fidelity) network, Worldwide Interoperability for Microwave Access (WiMAX) network, 3G (3 rd Generation) Network, 4G (4 th Generation) network, etc.
  • WiFi Wireless Fidelity
  • WiMAX Worldwide Interoperability for Microwave Access
  • 3G (3 rd Generation) Network 3G (3 rd Generation) Network
  • 4G (4 th Generation) network etc.
  • ONUO and ONUn can access the wireless network through a wireless access point for communication, or can directly perform point-to-point wireless communication.
  • the embodiment of the present invention is described by taking a WiFi port as an example, and those skilled in the art can obtain a case of using other types of wireless ports for communication.
  • the ONUO After receiving the user data, the ONUO can encapsulate the user data into an exchange message.
  • the exchange message can be in the form of an Ethernet packet or other types of packets, such as an Asynchronous Transfer Mode (ATM). Messages, etc.
  • ATM Asynchronous Transfer Mode
  • the packet carries the switch ID of the ONU0 device.
  • the switch ID can be determined by the service type of the ONU0 device.
  • the packet For an Ethernet packet, the packet can carry the virtual local area network (VLAN) of the ONU0 device.
  • VLAN virtual local area network
  • VPN Virtual Path Identifier
  • the user data received ONUO itself Gen 4 may be an Ethernet packet, packet or ATM, or other type of exchange messages.
  • the VLAN ID of the uplink service VLAN used is 100.
  • the ONU0 switches the VLAN ID 101 of the service data to Its own VLAN ID 100 is sent from the upstream port of ONU0 to the upper device.
  • ONUn uses the VLAN with the VLAN ID of 200 as the uplink, and supports the service access of the user port with the VLAN ID 201.
  • ONU0 and ONUn use There may be one or more of the upstream VLAN and the downstream VLAN.
  • the embodiment of the present invention is exemplified by an Ethernet packet, and a person skilled in the art can learn, according to the description, an operation situation in which an exchange message is an ATM message or another type of message.
  • the access-side service of the ONU0 is uplinked to the 0LT through the P0N port through the uplink VLAN.
  • the ONU0 receives the data of the user port 0, identifies the VLAN ID of the user data as 101, and switches to the ONU0's own VLAN ID 100.
  • the source media access control for the user 4 is completed (MAC, Med Ia Acces s Cont ro l) address learning, recording the mapping relationship between the source MAC address, user port 0, user VLAN ID 01, and upstream VLAN ID 100.
  • the uplink exchange with the VLAN ID 100 in the Ethernet text format is sent to the 0LT through the P0N port through the P0N protocol processing and the P0N encapsulation.
  • the ONU0 receives the information from the P0N port and processes the P0N packet through the P0N protocol, and obtains the Ethernet 4 packet of the VLAN ID 100.
  • the user port 0 and the user VLAN ID 101 are searched according to the VLAN information and the destination MAC address to complete the uplink. Switch from VLAN to user VLAN to obtain user data.
  • the port information is queried according to the destination MAC address and the uplink VLAN information of the downlink switching packet, and the MAC address is forwarded from the ONU0 to the VLAN 100, and then the VLAN identifier of the downlink packet is 1 00. , sent to ONU0.
  • ONU0 is the initiator of the switchover.
  • the uplink service channel is switched from the original uplink P0N port to the WiF i port, so that the service that is originally uplinked through the uplink port is sent to the standby 0NUn through the WiF i port.
  • the port mirroring function is used to mirror the original uplink port data to the WiF i port.
  • the WiF i port is added to the uplink VLAN.
  • the packets are broadcast in the VLAN and sent to the upstream port and the WiF port.
  • the standby terminal node ONUn may be a standby node determined according to the configuration, or may be a standby node dynamically determined through a certain communication interaction.
  • the communication protection method provided by the embodiment of the present invention may include the following steps: Step 309: ONUn receives an uplink radio packet sent by the ONUQ from the radio port, where the uplink radio packet includes uplink data, and the uplink data includes ONU0.
  • the data identifier is exchanged, and the uplink radio message further includes a wireless communication address of the ONU0.
  • the ONUn receives the uplink radio packet from the WiF i port, and the uplink data encapsulated in the uplink radio packet may be the uplink exchange packet sent by the ONU0 to the 0LT, and the uplink exchange packet includes the VLAN ID 1 00 used by the ONU0.
  • ID 100 is an exchange data identifier.
  • the uplink radio packet may be a Layer 2 packet as shown in FIG. 4, and the packet includes a packet header and a data field.
  • the packet header includes the following fields:
  • the AC is the destination MAC address
  • the SMAC is the source MAC address
  • the virtual local area network is used. (VLAN) tag
  • Ethernet message type is used.
  • the uplink data is encapsulated in the data field, and the content of the data field is identified by the definition of the Ethernet message type field as the uplink data sent by the ONU0 to the 0LT.
  • the source MAC field of the uplink wireless message includes the MAC address of the ONU0, and the MAC address is a wireless communication address.
  • Step 311 The ONUn sends an uplink packet from the P0N port to the 0LT, where the uplink packet includes the identifier of the ONUn and the uplink data extracted from the uplink radio packet.
  • ONUn After receiving the uplink radio packet, ONUn can forward the uplink data encapsulated in the uplink radio packet to the P0N port, and send the uplink packet to the 0LT through the P0N encapsulation.
  • the uplink data is data between ONU0 and 0LT, It is sent via the ONN and 0LT P0N ports, carrying the identifiers used by ONUn and 0LT communications.
  • the encapsulation format of the uplink packet varies according to the specific P0N type, and may be a GP0N, EP0N or X-GP0N type.
  • the communication data sent from 0NUQ to 0LT can be sent to the 0LT through the radio port between ONU0 and ONUn and the P0N port of ONUn, which protects the data communication between 0NUQ and 0LT.
  • the communication data of ONU0 and 0LT is forwarded by ONUn through the path indicated by the dotted line.
  • Step 31 The ONUn receives the downlink packet from the P0N port, and the downlink packet includes the identifier of the ONUn and the downlink data sent by the 0LT to the ONU0, where the downlink data includes the exchanged data identifier used by the ONU0.
  • the ONUn receives the downlink packet through the P0N port.
  • the packet can be a packet such as GP0N, EP0N, or XG-P0N.
  • the message contains the identifier used by ONUn and 0LT communication, but contains the downlink exchange message sent to ONU0, which contains the VLAN ID 100 used by ONU0.
  • Step 315 Forward the downlink data to the wireless port according to the exchange data identifier used by the ONU0, the wireless communication address of the ONU0, and the forwarding relationship of the wireless port of the ONUn, and from the wireless port.
  • the VLAN ID 100 is identified, and the corresponding relationship between the VLAN ID, the ONUn wireless port, and the ONUO wireless communication address is determined.
  • the exchanged packet is forwarded to the ONU's wireless port, and the ONU0's wireless communication address is used as the destination MAC address.
  • the downlink exchanged packet is wirelessly encapsulated and sent to ONU0.
  • the ONUn may extract the exchange data identifier used by the ONU0 and the wireless communication address of the ONU0 from the uplink radio message sent by the ONU0, and save the correspondence between the exchange data identifier and the radio communication address. For example, after the ONUn receives the uplink radio layer 2 packet from the WiF i port, it can determine, according to the Ethernet data type field of the layer 2 packet, that the data field of the packet includes the uplink exchange packet sent by the ONU0 to the 0LT, and the uplink
  • the exchange message contains the VLAN ID 100 used by the ONU0.
  • the Layer 2 message also includes the MAC address of the ONU0. It can be saved in the forwarding relationship between the VLAN ID 100, the MAC address of the ONU0, and the WiF i port of the ONUn. The forwarding relationship can be used to forward downlink data.
  • ONUn For the case where ONUn needs to forward data from multiple other 0NUs to 0LT, it can record the exchange data identifier used by each other ONU, the wireless communication address, and the forwarding relationship of the corresponding radio port used by ONUn, so as to correctly forward the downlink data to Other 0NU.
  • the method may further include step 302 as shown in FIG. 3a: Step 302: ONUn receives a protection group creation request message sent by the ONUQ from the wireless port, the message containing the exchange data identifier used by the ONU0 And wireless communication address.
  • the exchange data identifier and the wireless communication address may be extracted from the protection group creation request message, and a forwarding relationship is established.
  • the protection group creation request message can be sent from the ONU0 to the ONUn through the WiF i port in the form of a Layer 2 packet.
  • the format of the message can be as shown in Figure 4.
  • the wireless communication address of the ONU0 can be SMAC.
  • the Ethernet message type value can be defined to indicate that the data field carries a switching protocol message related to the service protection, such as the protection group creation request message herein.
  • the protection group delete request message can be sent to the ONUn. After the ONUn is received, the corresponding forwarding relationship related to the ONU0 can be deleted.
  • the content of the data field of the message can be according to the type length value ( TLV , Type Leng th Va lue ) Format encapsulation, one or more TLV fields can be carried as needed.
  • the message in this embodiment can adopt the format and content of Table 1.
  • the protection group creation message can contain the exchange data identifier, such as VLAN ID 1 00 used by ONU0.
  • the forwarding relationship is established by extracting the corresponding information from the protection group switching message.
  • ONUn can check the VLAN ID of the uplink data sent by the ONU0 to the 0LT and extract the information to establish the forwarding relationship, but directly forward to the P0N port. For the case where ONUn needs to forward data from multiple other 0NUs to 0LT, ONUn can extract the information to establish a forwarding relationship from the protection group switching message sent by each other 0NU.
  • the data to be sent to the active terminal node is identified from the downlink packet, the data is sent to the active terminal node through the wireless port of the standby terminal node.
  • the 0LT receives the exchanged packet of the VLAN ID 100 of the ONU0 through the PON0 port of the P0N port corresponding to the ONU0.
  • the switch identifier VLAN ID is also set to 100, and the VLAN ID of the ONUn is received from the PONn.
  • the exchange message of 200 set the VLAN ID to 200 for the exchange message to be sent to ONUn.
  • 0LT receives an ONUn from the PONn.
  • the OLT can establish the forwarding relationship by using the automatic learning mode.
  • the PONn receives the VLAN ID 100 sent by the ONU0, the OLT sends the packet to the ONUQ, and also sends the packet through the PONn port. Use VLAN ID 1 00 with ONU0.
  • the method may further comprise the following steps in Figure 3a:
  • Step 303 The ONUn receives the protection group switching request message sent by the ONU0 from the radio port, and the message includes the identifier of the ONU0.
  • the format of the protection group switching message can be as shown in Table 1.
  • the message contains the source 0NU, that is, the identifier of the ONU0, and is used to inform the ONU0 that the data of the ONU0 will be forwarded in the protection group protection group switching notification message sent to the 0LT.
  • the message may also include the destination 0NU, that is, the identity of ONUn, which may be used to verify whether the 0NU that received the message is 0NU of the data that needs to be forwarded to ONU0.
  • 0NUn may send a response message or may not send a response message. Accordingly, ONU0 may wait for the response message to be sent before sending the data, or may not wait for the response message.
  • Step 305 The ONUn sends a protection group protection group switching notification message from the P0N port to the 0LT, where the message includes the identifier of the ONU0. ONUn can send a protection group protection group switching notification message to 0LT through 0AM and 0MCI messages.
  • ONUn can notify the OLT that ONUn will forward the communication data between ONU0 and 0LT, and 0LT can perform corresponding processing.
  • 0LT can re-establish the forwarding relationship, and send the data originally sent to ONU0 through the PON0 port to the ONUn through the PONn port for ONUn forwarding.
  • the 0LT After receiving the protection group switching notification message, the 0LT can dynamically learn the forwarding relationship from the uplink packet, but can establish a forwarding relationship through the protection group switching notification message. Regardless of how the forwarding relationship is established, 0LT can still be sent to ONU0 through PON0 while being forwarded by ONUn.
  • Steps 303 and 305 may be first sent to the ONUn when the ONU0 determines that the switching needs to be performed, so that the ONUn is sent to the OLT, or may be sent during the process of forwarding data.
  • the method may further include the following steps as shown in FIG. 3a: Step 317: ONUn from the wireless The port receives the protection group recovery request message sent by the 0NUQ, the protection The protection group recovery request message includes the identifier of ONU0;
  • Step 319 ONUn sends a recovery notification message from the P0N port to the 0LT, and the recovery notification message includes the identifier of the ONU0.
  • ONU0 can notify 0LT through ONUn, and no longer forward communication data through ONUn, and ONU0 and 0LT can be restored to communicate using the P0N port.
  • the method may further comprise the following steps as shown in Figure 3a:
  • Step 306 ONUn sends a bandwidth request message from the P0N port to the OLT, and the bandwidth allocation request message requests to allocate a new bandwidth, which is greater than or equal to the currently available maximum bandwidth allocated by the 0LT to the ONUn, and less than or equal to the maximum available bandwidth allocated by the 0LT to the ONU0. And the sum of the maximum available bandwidth that 0LT allocates to ONU0.
  • Step 307 ONUn receives the bandwidth allocation message sent by the 0LT from the P0N port, and the bandwidth allocation message includes information about the new bandwidth requested by ONUn.
  • ONUn can obtain a larger new bandwidth.
  • the newly allocated bandwidth is the sum of the bandwidth originally allocated to ONU0 and ONUn, and ONUn can have sufficient bandwidth to transmit the communication data of ONU0 and ONUn to ensure the quality of service.
  • ONUn can send a bandwidth allocation request to 0LT after determining that the communication data between ONU0 and 0LT needs to be forwarded.
  • the method may further comprise the following steps as shown in Figure 3a:
  • Step 301 ONUn sends an authentication notification message from the wireless port, where the authentication notification message includes information of ONUn.
  • the information of the ONUn may include the identifier of the ONUn, the identifier of the 0LT to which the ONUn belongs, and the identifier of the P0N port on the 0LT corresponding to the ONUn.
  • the format of the authentication notification message can be as shown in Table 1.
  • the authentication notification message can be broadcasted to the ONU of the same wireless network as ONUn.
  • the standby terminal node ONUn can send its own information to other ONUs, and the other ONUs can dynamically select the alternate terminal node according to the received authentication notification message.
  • the ONU with the smallest identifier value may be selected as the backup according to the identifier of the ONU that sends the authentication notification message included in the authentication notification message, or may be the identifier of the 0LT corresponding to the ONU that sends the authentication notification message included in the authentication notification message.
  • the corresponding 0LT P0N port number selects the same P0N that corresponds to the same 0LT.
  • the port is used as a backup.
  • the above embodiment is described by taking 0NU as the terminal node and 0LT as the central office node.
  • the method described in this embodiment can also be applied to other types of terminal nodes and central office nodes.
  • the E0C central office equipment is located in the same wireless network, for example, in the WiF i network, and can form a protection group and protect each other.
  • the E0C terminal is called CNU. Taking CNUO and CNUn as an example, when the CNUO fails, it can CNUn initiates a switching request.
  • CNUn receives the CNUO switching request, and receives the CNUO uplink service data on the WiF i port, and sends it to the E0C central office device from its own uplink port.
  • Both the CNUO and the CNUn can be configured with the same service configuration on the E0C office. This ensures that the CNUO service is correctly forwarded after being forwarded by CNUn.
  • An embodiment of the present invention provides a device for communication protection. As shown in FIG.
  • ONUn which is shown as 500 in FIG. 5, and includes:
  • the radio port processing unit in the ONUn may be a WiF i port processing unit, configured to receive an uplink radio packet, where the uplink radio packet includes uplink data, where the uplink data includes an exchange data identifier of the ONU0, and the uplink radio packet Contains the wireless communication address of ONU0.
  • the exchange data identifier may be the uplink VLAN ID used by the ONU0
  • the wireless communication address may be the MAC address of the ONU0.
  • the WiF i port processing unit can be implemented in the WIFI chip.
  • the WIFI chip implements the encapsulation and decapsulation of the wireless device.
  • the address of the packet header is analyzed to identify whether the packet needs to be forwarded to the upper layer service module for processing or discarding.
  • the wired port processing unit in ONUn can be a P0N port processing unit for sending to the 0LT
  • the uplink packet includes the identifier of the ONUn and the uplink data sent by the ONU0 to the 0LT.
  • the wired port processing unit can be implemented in a general-purpose logic FPGA chip or in Application Specific Interconnected Circuits (ASIC).
  • apparatus 500 may further include:
  • the forwarding relationship establishing unit 505 is configured to establish a correspondence between the exchange data identifier used by the ONU0, the wireless communication address of the ONU0, and the wireless port of the ONUn.
  • the forwarding relationship establishing unit can be implemented by running software software using a general-purpose central processing unit.
  • the wired port processing unit 501 receives the downlink packet, where the downlink packet includes the identifier of the ONUn and the downlink data including the exchange data identifier used by the ONU0, and forwards the downlink data to the wireless port according to the exchanged data identifier and the established forwarding relationship.
  • the radio port processing unit 503 sends a downlink radio packet to the wireless communication address of the ONU0 stored in the forwarding relationship, and the downlink radio packet includes the downlink data.
  • the foregoing correspondence may be established by extracting, from the uplink radio packet, the exchange data identifier used by the ONU0, the wireless communication address of the ONU0, and storing the exchange data identifier used by the ONU0, the wireless communication address of the ONU0, and the correspondence of the wireless port of the ONUn.
  • the relationship may be obtained by extracting the exchange data identifier used by the ONU0 and the wireless communication address of the ONU0 from the protection group creation request message sent by the ONU0 received by the radio port processing unit 501, and storing the correspondence.
  • the radio port processing unit 501 may further receive a protection group switching request message sent by the ONU0, where the protection group switching request message includes an identifier of the ONU0; the wired port processing unit 503 sends a protection group switching notification message to the OLT, the protection The group switching notification message includes the identifier of the ONU0 extracted from the protection group switching request message.
  • the radio port processing unit 501 may further receive a protection group recovery request message sent by the ONU0, where the protection group recovery request message includes an identifier of the ONU0.
  • the wired port processing unit 503 sends a recovery notification message to the OLT, the recovery notification message. Contains the ID of ONU0.
  • the wired port processing unit 503 may further send a bandwidth request message from the PON port to the OLT, where the bandwidth allocation request message requests to allocate a new bandwidth, the new bandwidth is greater than or equal to 0LT allocated to the ONUn available maximum bandwidth, and less than or equal to 0LT is allocated to the ONU0.
  • Maximum available bandwidth and 0LT points The sum of the available maximum bandwidths allocated to the ONUO, and then the wired port processing unit 503 receives the bandwidth allocation message sent by the OLT from the PON port, the bandwidth allocation message containing information of the new bandwidth requested by the ONUn.
  • the radio port processing unit 501 can also send an authentication notification message, the authentication notification message including ONUn information.
  • the authentication notification message can be used to notify the ONUO that ONUn can forward the communication data between ONU0 and 0LT.
  • the embodiment of the present invention is described by taking an ONU as a terminal node and 0L T as a central office node.
  • the wired port processing unit may be a cable TV (CATT, Cab le TV) port processing unit.
  • CAT cable TV
  • Cab le TV Cab le TV
  • the embodiment of the present invention further provides a system for communication protection, as shown in 600 of FIG. 6, the system includes an active terminal node 601, a standby terminal node 603, a central office node 605, a primary terminal node, and a standby terminal node. It can be 0NU or E0C terminal. Correspondingly, the type of the central office node can be 0LT or E0C central office equipment. For the interaction process between the primary terminal node 601, the standby terminal node 603, and the central office node 605, reference may be made to the description of the method embodiment part and the device embodiment part.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention se rapporte à un procédé, à un dispositif et à un système de protection de communications. Le procédé selon l'invention comprend les étapes suivantes : un nœud terminal en mode d'attente reçoit, via un port radio, un message radio sur la liaison montante transmis par un nœud terminal actif, le message radio sur la liaison montante contenant des données sur la liaison montante qui sont transmises par le nœud terminal actif à un nœud de répartiteur central, les données sur la liaison montante comprenant une identification de données échangées du nœud terminal actif, et le message radio sur la liaison montante contenant d'autre part une adresse de communication radio du nœud terminal actif ; et le nœud terminal en mode d'attente transmet, via un port filaire, un message sur la liaison montante au nœud de répartiteur central, le message sur la liaison montante contenant une identification du nœud terminal en mode d'attente ainsi que les données sur la liaison montante transmises par le nœud terminal actif au nœud de répartiteur central. Grâce à la solution technique décrite dans le mode de réalisation de la présente invention, quand le nœud terminal actif ne dispose d'aucune liaison en ligne disponible, le nœud terminal actif et le nœud terminal en mode d'attente protègent les services en utilisant une liaison radio en même temps qu'une liaison en ligne.
PCT/CN2011/081739 2011-11-03 2011-11-03 Procédé et dispositif de protection de communications WO2012163039A1 (fr)

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CN2011800040821A CN102598587A (zh) 2011-11-03 2011-11-03 通信保护的方法和装置
PCT/CN2011/081739 WO2012163039A1 (fr) 2011-11-03 2011-11-03 Procédé et dispositif de protection de communications

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CN107241138B (zh) * 2016-03-28 2021-06-08 中兴通讯股份有限公司 Xg-pon系统及其通道倒换的重测距控制方法
CN110022174A (zh) * 2018-01-08 2019-07-16 中兴通讯股份有限公司 光网络单元业务保护的方法及装置

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