WO2022001840A1

WO2022001840A1 - Service distribution method for passive optical network

Info

Publication number: WO2022001840A1
Application number: PCT/CN2021/102221
Authority: WO
Inventors: 张波; 郑刚
Original assignee: 华为技术有限公司
Priority date: 2020-06-29
Filing date: 2021-06-24
Publication date: 2022-01-06
Also published as: CN113938771A; CN113938771B

Abstract

A virtual network unit is deployed on an OLT by means of a virtualization technology, and one or more ONUs corresponding to the same contracted service are managed by means of the virtual network unit. The virtual network unit on the OLT can be regarded as a proxy or a gateway for ONUs, and ONUs communicate with a network-side network element by means of the virtual network unit. For the ONUs, the ONUs no longer needs to perform address translation between local area networks and wide area networks, thus simplifying the processing of the ONUs. In addition, the virtual network unit is deployed on the OLT, and the virtual network unit is actually a functional unit of the OLT, so that, according to the method provided in the present application, no passive device needs to be added in PON system architecture, and the advantage that the passive optical network is easy in deployment is thus brought into full play.

Description

A kind of service distribution method of passive optical network

This application claims the priority of the Chinese patent application with the application number of 202010607384.9 and the application title of "a method for providing services for passive optical networks", which was submitted to the State Intellectual Property Office of China on June 29, 2020, the entire contents of which are by reference Incorporated in this application.

technical field

The present application relates to the field of optical communications, and more particularly, to a method for issuing services of a passive optical network (Passive Optical Network, PON).

Background technique

Passive Optical Network (PON) technology is a point-to-multipoint fiber access technology. A PON system may include an Optical Line Terminal (OLT), an Optical Distribution Network (ODN), and at least one Optical Network Unit (ONU). The OLT is connected to multiple ONUs through the ODN.

With the development of home broadband access technology, home terminals generally have WiFi access capabilities, and WiFi has become the main access to the networking of electronic devices (such as personal computers, mobile phones, tablet devices, smart TVs, smart speakers, smart home appliances, etc.) in the home. Way. However, due to the obstruction of walls in the home environment, the home networking solution with a single WiFi hotspot has blind spots in WiFi coverage, which can no longer meet the demands of home broadband access. Therefore, there are a variety of technologies for multi-WiFi hotspot networking in the market, such as using Ethernet cable, power line, coaxial cable, WiFi relay, etc. as the transmission medium for multi-WiFi hotspot networking.

However, as the demand for home access bandwidth continues to increase, the above-mentioned transmission media can no longer meet the higher and higher bandwidth requirements (such as gigabit bandwidth requirements). .

Similarly, in other business scenarios that are sensitive to communication delay and communication rate, such as industrial Internet, smart buildings, etc., with the continuous increase of communication bandwidth requirements and the increasing number of broadband access devices, it is also urgent to introduce optical fiber access. technology to support the needs of high bandwidth, multipoint access.

SUMMARY OF THE INVENTION

As the demand for access bandwidth continues to increase, more and more terminal devices will access the network through optical fibers, and the density and number of ONUs will gradually increase. Inventive ideas for management. Specifically, a virtual network unit is deployed on the OLT by using the virtualization technology, and one or more ONUs corresponding to the same subscription service are managed through the virtual network unit. The virtual network unit on the OLT can be regarded as a proxy or gateway of the ONU, and the ONU communicates with the network element on the network side through the virtual network unit. For the ONU, the ONU does not need to perform the address translation of the local area network and the wide area network, which simplifies the processing of the ONU. At the same time, since the virtual network unit is deployed in the OLT, the virtual network unit is actually a functional unit of the OLT. Therefore, no active equipment is added to the PON system architecture, which can give full play to the advantages of the passive optical network for easy deployment. It should be noted that the ONU corresponding to the subscription service or the ONU used for the same subscription service mentioned in this application refers to one or more ONUs that need to be used by the same type or the same type of subscription service of the user. The virtual network unit refers to the virtual network unit created by the OLT for the user subscription service. For example, if a user subscribes to the home broadband service, in order to improve the broadband access experience, an ONU is deployed in each room of the family, with a total of 4 ONUs, and the user's subscribed home broadband service corresponds to 4 ONUs; in addition, the operator network ( Such as the operation support system and the network element management system) will also instruct the OLT to create a virtual network unit to manage or control the four ONUs.

Based on the above inventive concept, the present application proposes a service provisioning method for an ONU, and a device and system corresponding to the method.

In a first aspect, the present application proposes a service provisioning method applied to a PON. First, the OLT receives a first message from the network element management system, where the first message includes a registration identifier of a virtual network unit and a registration identifier of at least one ONU, where the virtual network unit is a function that has been created or is to be created in the OLT Unit, virtual network unit and at least one ONU correspond to the same subscription service; When the OLT receives the registration request of the first ONU, the OLT authenticates the first ONU according to the registration mark of the first ONU included in the registration request, if the previous network The registration mark of at least one ONU issued by the meta management system includes the registration mark of the first ONU, and the authentication is passed; then, the OLT sends a service registration request to the configuration server, and the service registration request includes the registration mark of the virtual network unit, and the configuration server sends the registration mark to the configuration server. The OLT returns service parameters corresponding to the registration identifier of the virtual network element. It should be noted that, in this method, after the user subscribes to the service, the operation support system will send the registration identifier of a virtual network unit corresponding to the signed service and the registration identifier of at least one ONU to the network element management system, and then operate the system. The support system will also send the registration identifier of the virtual network unit and the corresponding service parameters to the configuration server.

Based on the method described in the first aspect, the virtual network unit in the OLT acts as an agent or management node of one or more ONUs, and the virtual network unit manages multiple virtual network units under the same group of subscribed services, and the virtual network unit Service registration is performed with the configuration server in a unified manner, and the ONU does not need to register services with the configuration server separately, which simplifies the ONU process and function.

In a possible implementation manner of the first aspect, the OLT also obtains, from the network element management system, a service virtual local area network tag (Service Virtual Local Area Network Tag, S-VLAN-T) and a user virtual local area network tag ( Customer Virtual Local Area Network Tag, C-VLAN-T); OLT establishes a business communication channel with Broadband Remote Access Server (BRAS) according to S-VLAN-T and C-VLAN-T, and obtains BRAS The Wide Area Network (WAN) IP address assigned to the virtual network unit. Subsequently, the virtual network unit communicates with the network element in the wide area network based on the WAN IP address. For example, in the service registration request sent by the OLT to the configuration server, the source address is the WAN IP address. It can be seen that, in the method proposed in this application, the OLT replaces one or more ONUs corresponding to the same subscription service to establish a service communication channel with the BRAS, which simplifies the processing of the ONU and the BRAS.

In a possible implementation manner of the first aspect, after the OLT authenticates the first ONU, the OLT also assigns a local area network (LAN) IP address to the user equipment connected to the first ONU; After the first ONU authentication is passed, the OLT also distributes the private virtual local area network label (Private Virtual Local Area Network Tag, P-VLAN-T) corresponding to the S-VLAN-T and the C-VLAN-T, and assigns the The P-VLAN-T is sent to the first ONU. Yes, as a communication gateway with a network address translation (NAT) function, the virtual network unit can implement message routing and forwarding between the ONU and other network elements. When the OLT receives the first packet from the first ONU, the packet header of the first packet includes P-VLAN-T, the LAN IP address of the user equipment and the MAC address of the virtual network unit; the OLT stores the data of the first packet Part of the encapsulation is sent to the Broadband Remote Access Server (BRAS) as a second packet, wherein the second packet carries S-VLAN-T, C-VLAN-T and WAN IP address; the second packet It also includes business parameters, such as at least one of account numbers, user names, and passwords. When the OLT receives the third packet from the BRAS, the OLT encapsulates the data part of the third packet into a fourth packet, and sends the fourth packet to the first ONU, where the fourth packet includes the P-VLAN-T and the LAN IP address of the user equipment.

In the local area network composed of the OLT and multiple ONUs, the OLT can route and forward messages in the local area network according to the P-VLAN-T and the MAC address of the message destination; assuming that the OLT manages multiple ONUs, the second ONU corresponds to the first ONU For the same subscription service, if the packet received by the OLT from the first ONU carries the MAC address corresponding to the second ONU, the OLT forwards the packet of the first ONU to the second ONU. Those skilled in the art should understand that the MAC address corresponding to the second ONU is the MAC address of the second ONU, or the MAC address of the user equipment connected to the second ONU.

In a possible implementation manner of the first aspect, the registration identifier is a logical registration identifier allocated by the operation support system for the virtual network unit and ONU corresponding to the same subscription service; the first message includes S-VLAN-T and C - VLAN-T. After receiving the first message, the OLT creates the virtual network unit on the OLT using a virtualization technology. In this implementation, the operation support system regards the virtual network unit in the OLT as the agent or gateway of the ONU, and manages the virtual network unit and the connected ONUs corresponding to the same subscription service as a group, and the operation support system Allocate logical registration identifiers for the virtual network unit and its connected ONUs corresponding to the same subscription service, and send these logical registration identifiers to the OLT; the OLT creates the virtual network unit, authenticates the ONU according to the logical registration identifier, and serves as the ONU The agent establishes communication channels with other network elements.

In a possible implementation manner of the first aspect, the device serial number identified as the ONU is registered; before the OLT receives the first message, the OLT creates a virtual network unit according to the second message sent by the network management system, which is the virtual network The unit assigns the device serial number and sends the device serial number of the virtual network unit to the network element management system. In this implementation, the OLT first creates a virtual network unit according to the instructions of the network management system, assigns a device serial number to it, and then reports the device serial number of the virtual network unit to the operation support system; The mobile terminal of the operation and maintenance personnel) also sends the equipment serial number of the ONU to the operation support system; the operation support system sends the equipment serial number of the ONU corresponding to the same contracted service to the OLT, and the OLT authenticates the ONU according to the equipment serial number of the ONU. And as an agent of the ONU to establish a communication channel with other network elements.

In a second aspect, the present application provides an OLT device. The device includes a processor, memory and a transceiver. The transceiver is used to send and receive signals and data; the memory is used to store program instructions; the processor is used to execute the program stored in the memory. When the program is executed, the OLT executes as described in the first aspect. method described.

In a third aspect, the present application provides a PON system, the PON system includes the OLT described in the above aspect and at least one optical network unit.

Description of drawings

1 is a schematic diagram of a PON system architecture provided by an embodiment of the present application;

2 is a schematic schematic diagram of a method for issuing a PON service provided by an embodiment of the present application;

3 is a schematic flowchart of a method for establishing a communication channel between a virtual network unit and a BRAS according to an embodiment of the present application;

4 is a schematic flowchart of a method for issuing a PON service provided by an embodiment of the present application;

5 is a schematic flowchart of another PON service provisioning method provided by an embodiment of the present application;

6 is a schematic diagram of a PON system architecture for ONU management based on services provided by an embodiment of the present application;

FIG. 7 is a functional schematic diagram of a virtual network unit according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of an OLT device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another OLT device provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

The technical solutions of the embodiments of the present application can be applied to various passive optical network systems, for example, next-generation PON (NG-PON), NG-PON1, NG-PON2, gigabit-capable PON (next-generation PON, NG-PON) PON, GPON), 10 gigabit per second PON (10 gigabit per second PON, XG-PON), symmetric 10 gigabit passive optical network (10-gigabit-capable symmetric passive optical network, XGS-PON), Ethernet PON ( Ethernet PON, EPON), 10 gigabit per second EPON (10 gigabit per second EPON, 10G-EPON), next-generation EPON (next-generation EPON, NG-EPON), wavelength-division multiplexing (wavelength-division multiplexing, WDM) PON , Time-and wavelength-division multiplexing (TWDM) PON, point-to-point (P2P) WDM PON (P2P-WDM PON), asynchronous transfer mode PON (asynchronous transfer mode PON, APON) ), broadband PON (broadband PON, BPON), etc., and 25 gigabit per second PON (25 gigabit per second PON, 25G-PON), 50 gigabit per second PON (50 gigabit per second PON, 50G-PON), 100 Gigabit per second PON (100gigabit per second PON, 100G-PON), 25 Gigabit per second EPON (25gigabit per second EPON, 25G-EPON), 50 Gigabit per second EPON (50gigabit per second EPON, 50G-EPON), 100 gigabit per second EPON (100gigabit per second EPON, 100G-EPON), and other rates of GPON, EPON, etc.

FIG. 1 is a schematic structural diagram of a PON system proposed by the application. As shown in FIG. 1, the PON system 100 includes at least one OLT 101, at least one ODN 102, and at least one ONU. Among them, the OLT 101 provides a network-side interface for the PON system 100 to connect various network-side network elements or entities, such as the network element management system 106, the configuration server 107, and the Broadband Remote Access Server (BRAS) 105. ONU 103-1, ONU 103-2 and ONU 103-3 are connected to OLT 101 through ODN 105, ONU provides user-side interface for PON system 100, ONU is the optical access device closest to the terminal; ONU can also be called optical Network terminal (Optical Network Terminal, ONT), for the convenience of description, ONT and ONU are collectively referred to as ONU in the following; Figure 1 takes 3 ONUs as an example, there may be more ONUs or only one ONU in the actual networking; for the convenience of description , hereinafter, ONU 103 is used to refer to any ONU among ONU 103-1, ONU 103-2 and ONU 103-3; in FIG. 1, ONU 103-1, ONU 103-2 and ONU 103-3 may be a family It can be an optical cat distributed in different rooms in a building, or it can be an optical access device distributed in different areas (such as different floors) in a building, or it can be an optical access device distributed in different production lines or workshops in a factory . ODN 104 is a network composed of optical fibers and passive optical splitting devices, used to connect OLT 101 equipment and ONU 103 equipment, and used to distribute data signals between OLT 101 and ONU 103. The network element management system 106 is a system for managing the network, devices or network elements within the network. The configuration server 107 is responsible for configuring and managing the client terminal equipment. The Broadband Remote Access Server (BRAS) 105 is a bridge between the broadband access network and the backbone network, and provides functions such as access, authentication, billing, control, and management for broadband network users.

The PON system shown in Figure 1 can be applied to various scenarios that require broadband access, such as homes, buildings, and industries. For example, in a family, by distributing ONU 103 in each room, users can obtain faster and more stable broadband access experience. With the increase in the density and number of ONUs, how to manage these ONUs concisely and how to optimize service provisioning and service interworking processes have become technical issues that need to be solved urgently.

The PON system architecture 100 proposed in the present application uses virtualization technology to deploy a virtual network unit 102 on the OLT, and manages and controls the ONU 103 in groups, such as user-based subscription services, corresponding to the same group or one of the same subscription services. Or multiple ONUs 103 carry out unified management and control through a virtual network unit 102; the virtual network unit 102 can be regarded as an agent or a gateway of the ONU 103, and the ONU 103 communicates with the network side network element through the virtual network unit 102; each ONU 103 does not It is necessary to establish a communication channel with the network element on the network side, which simplifies the processing of the ONU 103. At the same time, since the virtual network unit 102 is deployed in the OLT 101, it is actually a functional unit of the OLT 101. Therefore, no new active devices are added to the PON system architecture.

It should be noted that the virtualization technology described in this application is a resource management technology in the computer field. , breaking the inseparable barriers between solid structures, allowing users to apply these resources in a better way than the original configuration. This application does not limit the specific type of virtualization technology, and the virtual network unit 102 can be deployed in the OLT by applying the container technology or other virtualization technology.

Based on the PON system 100 shown in FIG. 1 , the method and device proposed in the present application will be introduced below with reference to specific embodiments. In the following specific embodiments, for the convenience of understanding, the method and apparatus proposed in the present application will be mainly introduced in the context of a home broadband access scenario. Those skilled in the art can understand that the methods and devices described in this application can also be applied to other industries and application scenarios, such as broadband access for industrial Internet, broadband access for intelligent building management, and Broadband access for smart transportation, etc.; that is, when an application scenario is compared with a home broadband access service, the main difference lies in the type of service and the deployment location of the ONU 103, the method, device and system provided in this application can also be applied to The broadband access scenario.

FIG. 2 is a flow chart of a service provisioning method proposed by the present application. Before the service provisioning process shown in Figure 2, it is assumed that the user has signed a service contract with the operator, and the contracted service may include one or more services, such as broadband Internet access, voice over IP (Voice over Internet Protocol, VoIP) and other services , the subscription service corresponds to one or more ONUs 103. The operations support system (OSS) determines the registration identifier of the virtual network unit and the ONU that is bound to or corresponding to the user's subscription service; the registration identifier of the ONU is used to uniquely identify an ONU. During the registration process of the ONU with the OLT, the ONU The registration identifier of the virtual network unit is used to identify the identity of the ONU; the registration identifier of the virtual network unit is used to identify the virtual network unit, and the registration identifier of the virtual network unit is used to identify the identity of the virtual network unit during the service registration process of the virtual network unit. The OSS also generates contracted service data. The contracted service data includes service parameters; the service parameters include the service activation status of each broadband access service, and the account and password of each broadband access service, such as broadband Internet access account and password, VoIP account and password, etc. . The OSS sends the registration identifier of the virtual network unit and corresponding service parameters to the configuration server. The OSS sends the registration identifiers of the virtual network unit and the ONU to the network element management system.

201: The network element management system 106 sends the registration identifier of the virtual network element and the registration identifier of at least one ONU to the OLT 101. The registration identifier of the virtual network unit is the registration identifier of the virtual network unit 102; the ONU is the ONU 103 deployed in the user's home to provide broadband access for the user's terminal equipment; the ONU 103 corresponding to the registration identifier of at least one ONU corresponds to the same By signing a service, the same broadband access service can be provided for the user terminal. The virtual network unit 102 records the registration identifier of the ONU as a credential for subsequent ONU registration authentication. It should be noted that when the OLT 101 receives the 201 message, the virtual network unit 102 may have been created, or the virtual network unit 102 may not have been created. If the virtual network unit 102 has not been created, the OLT 101 uses the virtualization technology to create the virtual network unit 102 after receiving the 201 message.

202: The ONU 103 sends a registration request to the OLT 101, which carries the registration identifier of the ONU. After the user subscribes to the broadband service, the ONU 103 will be installed and enabled at home. The ONU 103 sends a registration request to the OLT 101 after being powered on. There are various types of ONU registration identifiers, which can be the serial number of the ONU 103 device, or a logical number assigned by the OSS to the ONU 103 (also referred to as a logical registration identifier). When the registration identifier is the logical registration identifier allocated by the OSS, the user or operation and maintenance personnel is required to import the logical registration identifier into the ONU 103, such as inputting the logical registration identifier through a web page or application client for ONU maintenance.

203: The OLT 101 receives the registration request from the ONU 103 and authenticates the ONU 103. If the registration identifier of the ONU received in the 201 message includes the registration identifier carried in the 202 message, the authentication is passed. If the user signs up and enables multiple ONUs, the OLT 101 will receive registration requests from multiple ONUs 103, and the OLT 101 associates these ONUs 103 with the virtual network unit 102, and assigns the multiple ONUs 103 to the same home virtual network. manage. The so-called associating the ONU 103 with the virtual network unit 102 refers to recording the correspondence between the ONU 103 and the virtual network unit 102.

204: The virtual network unit 102 in the OLT 101 sends a service registration request to the configuration server 107 on behalf of the ONU 103 to obtain service parameters corresponding to the subscribed service. The service registration request sent by the OLT 101 to the configuration server 107, which carries the registration identifier of the virtual network unit 102; The corresponding service parameters are sent to the OLT 101. The subsequent virtual network unit 102 carries service parameters in the packets sent to the BRAS or the service server, and the BRAS or the service server authenticates the user according to the service parameters. It should be noted that the virtual network unit 102 in the OLT 101 only needs to perform service registration once; if the virtual network unit 102 completes the service registration and obtains service parameters, it receives the registration request of other ONUs 103 corresponding to the same contracted service, the virtual After the ONU 103 is authenticated by the network unit 102, it is not necessary to perform service registration again.

A brief concept of service provisioning in the PON system 100 is introduced in FIG. 2 . The virtual network unit 102 in the OLT 101 acts as a proxy or aggregation node for one or more ONUs 103 in the user's home network, and the virtual network unit 102 manages multiple virtual network units 102 under the same subscription service. The service registration is performed with the configuration server 107 in a unified manner; the ONU 103 does not need to perform service registration with the configuration server 107 respectively, which simplifies the flow and function of the ONU 103.

It should also be noted that, since the virtual network unit 102 is a virtual function unit or virtual function module in the OLT 101, the functions implemented by the virtual network unit 102 and the functions implemented by other components of the OLT 101 are not absolutely obvious. Some functions can be realized by the virtual network unit 102, and can also be realized by other components in the OLT 101; such as the registration identifier of the virtual network unit issued by the network element management system 106 and the registration identifier of at least one ONU can be stored In the public memory of the OLT 101, it can also be stored in the dedicated memory of the virtual network unit 102; for another example, the authentication of the ONU 103 in step 203 can be implemented by other parts of the OLT other than the virtual network unit 102, or It is realized by the virtual network unit 102; the virtual network unit 102 and the external network element send messages, and also need the cooperation of the OLT 101 communication single board or the communication interface; therefore, in the description of FIG. 2 and the following embodiments, if there is no clear The description is a function or method that needs to be performed by the virtual network unit 102, and the method performed by the OLT 101 may be performed by the virtual network unit 102, or may be implemented by other components.

On the basis of the flow shown in FIG. 2, FIG. 3 further describes how the virtual network unit 102 establishes a communication channel with the BRAS, and how to allocate a local area network IP to the ONU 103 in a home virtual network. Fig. 3 has the same message or step as Fig. 2, and adopts the same message or step number as Fig. 2.

301: The network element management system 106 also sends the channel parameters of the broadband access to the OLT 101. The subscription service data introduced in Figure 2 includes not only service parameters, but also channel parameters. The so-called channel parameters refer to the parameters required when establishing a communication channel with the BRAS, such as Service Virtual Local Area Network Tag (S-Virtual Local Area Network Tag, S- VLAN-T) and User Virtual Local Area Network Tag (Customer Virtual Local Area Network Tag, C-VLAN-T), etc. The channel parameters may be delivered by the OSS to the network element management server 107 , or may be allocated by the network element management server 107 . The network element management server 107 delivers the channel parameters to the OLT 101. It should be noted that the content delivered by the network element management system 106 in the 301 and 201 messages can be delivered through one message, or through different messages; when 301 and 201 are two different messages When, 301 and 201 are not limited in order.

302: When the OLT 101 receives the 301 message, the virtual network unit 102 may have been created, or the virtual network unit 102 may not have been created. If the virtual network unit 102 has not been created, the OLT 101 uses the virtualization technology to create the virtual network unit 102 after receiving the 301 message. The OLT 101 obtains the channel parameters from the network element management system 106, and after creating the virtual network unit 102, establishes a communication channel with the BRAS 105 based on the channel parameters, and obtains the WAN IP address assigned by the BRAS 105 to the virtual network unit 102. The subsequent virtual network unit 102 uses this wide area network IP address to communicate with other network elements in the wide area network. As in step 204, the OLT 101 uses the wide area network IP address of the virtual network unit 102 as the source address to communicate with the configuration server 107. It should be noted that, steps 302 and 202 are not limited in time sequence.

303: As described in the embodiment corresponding to FIG. 2, after a certain ONU 103 is successfully registered, the virtual network unit 102 and other ONUs 103 corresponding to the same subscription service belong to the same home virtual network for management. The virtual network is a local area network formed by at least one ONU 103 and a virtual network unit. Specifically, the virtual network unit 102 needs to allocate local area network parameters in the home virtual network to the ONU 103 successfully registered, and the local area network parameters include one or more of the following parameters, such as the local area network IP address and the private virtual local area network label (Private Virtual Local Area Network). Local Area Network Tag, P-VLAN-T), etc. It can be understood that the virtual network unit 102 supports the function of a Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, DHCP) server, and allocates the internal IP of the home virtual network to the ONU 103 it manages. When the ONU 103 needs to communicate with network elements other than the local area network, the virtual network unit 102 needs to report the local area network (also referred to as an intranet or a private network) and a wide area network (also referred to as an external network or a public network). The virtual network unit 102 also needs to have the function of network address translation (NAT) to perform IP address translation between the local area network and the wide area network. It should be noted that the present application does not limit the sequence of steps 303 and 204 .

FIG. 2 and FIG. 3 introduce the basic concept of a service provisioning method, and the method is applied to the PON system 100 proposed in this application. For ease of understanding, on the basis of FIG. 2 and FIG. 3 , FIG. 4 introduces an example of service provisioning in which a registration identifier is allocated by the OSS.

401: The user signs the service with the operator, and the OSS allocates a logical registration identifier to the virtual network unit and the ONU bound to or corresponding to the user subscribed service; the OSS generates the subscribed service data, and the subscribed service data includes service parameters and channel parameters.

402: The OSS sends the logical registration identifier of the virtual network unit and corresponding service parameters to the configuration server 107.

403: The OSS sends the logical registration identifiers of the virtual network unit and the ONU and the corresponding channel parameters to the network element management system 106.

404: The network element management system 106 sends the logical registration identifiers of the virtual network unit and the ONU, as well as the corresponding channel parameters, to the OLT 101. For a specific explanation of this step, refer to step 201 and step 301, which will not be repeated here.

405: The OLT 101 obtains the WAN IP address assigned by the BRAS 105 to the virtual network unit 102. See step 302 for specific explanation.

406-407: ONU 103 sends a registration request to OLT 101, and OLT 101 authenticates ONU 103. See steps 202 and 203 for details.

408: The virtual network unit 102 allocates the local area network parameters in the home virtual network to the ONU 103 that is successfully registered. See step 303 for details.

409 : The virtual network unit 102 communicates with the configuration server 107 to acquire service parameters corresponding to the logical registration identifier of the virtual network unit 102 . See step 204 for details.

In the process shown in FIG. 4, the registration identifier is allocated by the OSS to the virtual network unit 102 and the ONU 103. In another implementation manner, the device serial number of the ONU may also be used as the registration identifier. Figure 5 introduces a service issuance process using the device serial number as the registration identifier.

501 : The user signs a service contract with the operator, and the OSS generates contracted service data, and the contracted service data includes service parameters and channel parameters.

502: The OSS sends the channel parameters to the network element management system 106.

503: The network element management system 106 sends the channel parameters to the OLT 101.

504: The OLT 101 records the channel parameters, creates a virtual network unit 102, assigns a device serial number to the virtual network unit 102, and returns the device serial number of the virtual network unit 102 to the network element management system 106. It should be noted that since the virtual network unit 102 is a virtual optical network unit created by the OLT 101, the device serial number of the virtual network unit 102 is not the serial number of a real device, but the OLT 101 is the virtual network unit 102 An assigned ID.

505: The network element management system 106 returns the device serial number of the virtual network unit 102 to the OSS.

506: The OSS sends the device serial number of the virtual network unit 102 and the corresponding service parameters to the configuration server 107.

507: The OSS delivers the device serial number of the virtual network unit 102 to the subscriber or the operation and maintenance personnel. For example, the OSS sends the device serial number of the virtual network unit 102 to the mobile terminal of the subscriber or the operation and maintenance personnel.

508: When one or more ONUs 103 need to be installed and enabled, send the device serial number of one or more ONUs 103 and the device serial number of the virtual network unit 102 to the OSS through the mobile terminal. There are many ways for the mobile terminal to obtain the device serial number of the ONU 103, which can be manually entered or scanned through the mobile terminal application client to scan the device serial number barcode of the ONU 103. The mobile terminal may report the device serial numbers of multiple ONUs 103 in one report message, or may report the device serial numbers of the ONUs 103 one by one.

509-510: The OSS issues the device serial numbers of the virtual network unit 102 and the ONU 103 to the network element management system 106, and the network element management system 106 issues the device serial numbers of the virtual network unit 102 and the ONU 103 to the OLT 101.

511-513: The ONU 103 sends a registration request to the OLT 101, and the OLT 101 authenticates the ONU 103, and allocates local area network parameters in the home virtual network to the ONU 103 successfully registered. This step is similar to steps 406 and 408 in FIG. 4, except that the registration identifier of the ONU 103 carried in step 511 is the device serial number of the ONU 103, and the OLT 101 authenticates the ONU 103 according to the device serial number.

514: The OLT 101 obtains the WAN IP address assigned by the BRAS 105 to the virtual network unit 102. Refer to step 302 for specific explanation. It should be noted that, after obtaining the channel parameters, the OLT 101 can obtain the WAN IP address assigned by the BRAS 105 to the virtual network unit 102 at any time, that is, the step 514 can occur at any time after the step 503 and before the step 515.

515: The virtual network unit 102 sends a service registration request to the configuration server 107 to obtain service parameters corresponding to the subscribed service. For details of this step, please refer to the description of step 204 . The registration identifier described in step 204 is specifically the device serial number of the virtual network unit 102 in this embodiment.

Based on the methods of Fig. 2 and Fig. 3, Fig. 4 and Fig. 5 respectively show two different service provisioning examples. In the process shown in Figure 5, the device serial number is used as the authentication identifier, and the OSS does not need to assign the authentication identifier. However, since in the method shown in FIG. 5, the OSS needs to collect and obtain the equipment serial number of the ONU 103, the OSS still needs the participation of the OSS in the process of registering the ONU 103 after step 501 (see steps 508 and 509). In the solution shown in FIG. 4 , after the OSS generates and issues the registration identifier and contracted service data in step 401, it no longer needs to participate in the registration and online process of the ONU 103. The two embodiments have their own characteristics and are suitable for different network operation and maintenance requirements.

2 to 5 introduce the concept and specific embodiments of service provisioning in the PON system 100 . Compared with the prior art, in the service provisioning method proposed by this application, the virtual network unit 102 located in the OLT 101 uniformly manages multiple ONUs 103 of the user, and each ONU 103 does not need to establish a communication channel with the BRAS 105 respectively to obtain the WAN IP address, There is also no need to initiate service registration to the configuration server 107 to obtain service parameters, which simplifies the processing of the ONU 103 and improves the system performance.

The PON system architecture proposed in Figure 1 is flexible and scalable, conforms to the trend of cloudification and ONU simplification, and is conducive to operators to quickly deploy new services. The architecture shown in FIG. 1 can be extended to implement service-based ONU management. As shown in Figure 6, a virtual network unit 102 on the OLT corresponds to a plurality of ONUs 103 of the same type or the same group of services, and the virtual network unit 102 serves as a communication gateway for the ONU 103 and other user equipment or terminal equipment connected to the ONU 103, It makes business easy to deploy and network easy to maintain. As shown in FIG. 6 , ONUs 103 corresponding to different services are managed by different virtual virtual network units 102 on the OLT, and the virtual network units 102 communicate with servers or service platforms that provide services. The home broadband service platform 111, the virtual reality service platform 112 and the IoT service platform 113 respectively provide home broadband service, virtual reality service and IoT service. These business platforms 110 can be deployed in the cloud in a cloud-like manner. The OLT 101 provides a home broadband service virtual network unit 102, a virtual reality service virtual network unit 102, and an IoT service virtual network unit 102, and manages the ONUs 103 corresponding to the services respectively. It should be noted that FIG. 6 is only an example of a network architecture, and does not include all network elements. For example, the OLT 101 may need to communicate with the service platform through the BRAS 105. It should also be noted that when an ONU 103 needs to support multiple service types, it may belong to different virtual network units 102 for management.

It can be seen from the above description that in the service provisioning process, the virtual network unit 102, as a virtual ONU, acquires the channel parameters and service parameters corresponding to the subscribed service. The following will introduce how the virtual network unit 102 routes and forwards messages based on the channel parameters and the service parameters in the business process. As shown in FIG. 7 , the virtual network unit 102 needs to have the functions of a NAT 701 and a DHCP server 702. The network between the virtual network unit 102 and the ONU 103 is a local area network (or referred to as an intranet or a private network), and the network between the virtual network unit 102 and the BRAS 105 is a wide area network (or referred to as an external network or a public network). The virtual network unit 102 needs to support the function of the DHCP server 702, and allocates the local area network parameters in the home virtual network for the ONU 103 successfully registered, and the local area network parameters include one or more of the following parameters, such as the local area network IP address and the private virtual local area network label ( Private Virtual Local Area Network Tag, P-VLAN-T), etc. When the ONU 103 needs to communicate with network elements other than the local area network, the virtual network unit 102 needs to perform packet forwarding between the internal network and the external network, and the virtual network unit 102 also needs to have the function of NAT 701 to perform IP transfer between the internal network and the external network. Address translation. It should be noted that NAT address translation can be performed in various ways. For example, the virtual network unit 102 can map the LAN IPs of different ONUs 103 to the same WAN IP and different ports, or map the LAN IPs of different ONUs 103 to the same WAN IP and different ports. are different WAN IPs; for the convenience of description, this application is collectively referred to as the conversion between WAN IP addresses and LAN IP addresses, and no longer reflects the concept of port numbers.

When the OLT 101 receives a message from a certain registered ONU 103, the header of the message includes the P-VLAN-T allocated by the virtual network unit 102, the LAN IP address and virtual network allocated by the virtual network unit 102 for the user equipment. The media access control (Media Access Control, MAC) address of the network unit 102, the virtual network unit 102 converts the LAN IP address in the message to the WAN IP address, and converts the P-VLAN-T in the message to the S-VLAN -T and C-VLAN-T, and carry service parameters in the message, and then forward the message to the BRAS 105 through the WAN interface 703. The BRAS 105 authenticates the virtual network unit 102 according to the S-VLAN-T and the C-VLAN-T; when the OLT 101 receives a message from a certain registered ONU 103, the message header of the message includes the virtual network unit 102 The assigned P-VLAN-T and the corresponding media access control (Media Access Control, MAC) address of another ONU 103, then the virtual network unit 102 directly forwards the message to another ONU 103 through the LAN interface 704. It should be understood by those skilled in the art that the MAC address corresponding to another ONU 103 is the MAC address of the other ONU 103, or the MAC address of the user equipment to which the other ONU 103 is connected.

When the OLT 101 receives a packet from the BRAS, the packet includes S-VLAN-T, C-VLAN-T and WAN IP address, the virtual network unit 102 needs to convert the S-VLAN-T and C-VLAN-T in the packet T is converted to P-VLAN-T, the WAN IP address is converted to the LAN IP address of the corresponding ONU 103, and then the message is sent to the corresponding ONU 103 through the LAN interface 704.

As can be seen from the above example, in the local area network formed by the virtual network unit 102 and the ONU 103, through the P-VLAN-T and the MAC address, message forwarding and intercommunication in the local area network can be realized. When communicating with other devices, the virtual network unit 102 acts as a communication gateway to implement message routing and forwarding between the ONU 103 and network elements outside the local area network.

In addition to the NAT and DHCP server functions, for specific services, the virtual network unit 102 also needs to have specific functions corresponding to the services. Point Protocol over Ethernet, PPPOE) dial-up function.

It should be noted that the WAN interface 703 and the LAN interface 704 in FIG. 7 are logical interfaces, which can be specifically implemented by software codes or programs; the dotted lines shown in FIG. 7 represent logical connections. The message sent or received by the LAN interface 704 may need to be realized through the PON interface board of the OLT 101, that is, the virtual network unit 102 communicates with the ONU 103 through the PON interface board of the OLT 101; it needs to pass through the WAN interface of the virtual network unit 102. 703 The message sent or received may need to be implemented through the network side interface of the OLT 101, for example, the virtual network unit 102 communicates with the BRAS 105 through the network side interface of the OLT 101.

The present application also provides an OLT 101 device 800. As shown in FIG. 8, the device includes a processor 801, a memory 802, and a transceiver 803, and the processor 801, the memory 802, and the transceiver 803 are connected to each other by wires.

The processor 801 may adopt a general-purpose central processing unit (Central Processing Unit, CPU), a microprocessor, an application-specific integrated circuit ASIC, or at least one integrated circuit, for executing a related program, so as to implement the technology provided by the embodiments of the present invention plan. The processor can independently have the function of PON-related protocol media access control (MAC), or can realize the PON protocol MAC function through an external chip to realize communication with the ONU 103. The processor can independently have the function of the Ethernet MAC, or can realize the function of the Ethernet MAC through an external chip, so as to realize the communication with other network elements other than the ONU 103 . Device 800 may include multiple processors, each of which may include one or more CPUs. The processor 801 is specifically responsible for executing the methods related to the OLT 101 in this application, and communicates with other network elements or devices through the transceiver 803.

Memory 802 is used to store program instructions and data. The memory can be a read-only memory (Read Only Memory, ROM), a static storage device, a dynamic storage device, or a random access memory (Random Access Memory, RAM). When implementing the technical solutions provided by the embodiments of the present invention through software or firmware, program codes for implementing the technical solutions provided by the embodiments of the present invention are stored in the memory 802 and executed by the processor 801 . The memory 802 can be used to store and record the correspondence between the ONU 103 and the virtual network unit 102, the registration identifier of the ONU 103 and the registration identifier of the virtual network unit 102. The processor 801 executes the program instructions in the memory 802 to realize the functions of the OLT 101 described in this application, such as creating a virtual network unit 102, realizing functions such as the NAT 701 and the DHCP server 702.

In one embodiment, the processor 801 may include a memory 802 inside. In another embodiment, processor 801 and memory 802 are two separate structures.

The transceiver 803 is configured to perform the operations of transmitting and receiving signals or data of the OLT in the above embodiments. Transceiver 803 includes an optical transmitter and/or an optical receiver. Optical transmitters can be used to transmit optical signals, and optical receivers can be used to receive optical signals. The light transmitter can be realized by a light-emitting device, such as a gas laser, a solid-state laser, a liquid laser, a semiconductor laser, a directly modulated laser, and the like. The optical receiver may be implemented by a photodetector, such as a photodetector or a photodiode (eg, an avalanche diode) or the like. Transceiver 803 may also include digital-to-analog converters and analog-to-digital converters. The transceiver 803 may further include a wavelength division multiplexer for realizing multiplexing and demultiplexing of optical signals of different wavelengths.

Since the OLT not only needs to communicate with the ONU, but also needs to communicate with other network-side network elements (such as BRAS, network element management system, configuration server, etc.) other than the ONU 103, the signal transceiver function performed by the transceiver 803 can be specifically performed by Different transceivers are implemented separately. As shown in FIG. 9 , the transceiver 803 of the OLT 101 device 900 includes a user-side transceiver 8031 and a network-side transceiver 8032 . The user-side transceiver 8031 may be specifically located on the PON interface board of the OLT to implement the functions of the user-side interface described in the above embodiments, and the user-side transceiver 8031 is used to send and receive communication signals with the ONU 103. The transceiver 8031 receives messages from the ONU 103 (eg, step 202, step 406, step 511), and sends a message to the ONU 103 (eg, step 303, step 408, step 513). The network side transceiver 8032 is used to send and receive communication signals with the network side network element, and realize the function of the network side interface in the above-mentioned embodiment. For example, the OLT 101 sends a message to the network side network element through the network side transceiver 8032 (as in step 204, Step 302, Step 405, Step 409, Step 504, Step 514, Step 515), or receive a message from the network element on the network side (eg Step 201, Step 204, Step 301, Step 302, Step 404, Step 405, Step 409) , step 503, step 510, step 514, step 515). The structures of the network-side transceiver 8032 and the user-side transceiver 8031 are similar to those of the transceiver 803, and will not be repeated here.

The embodiments of the present invention also have various beneficial effects described in the foregoing method embodiments, which are not repeated here.

The present invention also provides a PON system, which includes the above-mentioned optical line terminal OLT 101 and one or more optical network units ONU 103.

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present invention are generated. The computer may be a general purpose computer, special purpose computer, computer network, or other programmable device. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center is by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The usable media may be magnetic media (e.g., floppy disk, hard disk, magnetic tape), optical media (e.g., DVD), or semiconductor media (e.g., Solid State Disk (SSD)), and the like.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A passive optical network (Passive Optical Network, PON) service issuing method, characterized in that,

The optical line terminal (Optical Line Terminal, OLT) receives the first message from the network element management system, where the first message includes a registration identifier of a virtual network unit and a registration identifier of at least one optical network unit (Optical Network Unit, ONU) , wherein the virtual network unit is a functional unit that has been created or to be created in the OLT, and the virtual network unit and the at least one ONU correspond to the same subscription service;

The OLT receives the registration request of the first ONU, and the registration request of the first ONU includes the registration mark of the first ONU;

The OLT authenticates the first ONU according to the registration mark of the first ONU, and if the registration mark of the at least one ONU includes the registration mark of the first ONU, the authentication is passed;

The OLT sends a service registration request to the configuration server to obtain service parameters corresponding to the subscribed service, where the service registration request includes the registration identifier of the virtual network unit.
The method of claim 1, wherein the method further comprises:

The OLT obtains the service virtual local area network tag (Service Virtual Local Area Network Tag, S-VLAN-T) and the customer virtual local area network tag (Customer Virtual Local Area Network Tag, C corresponding to the contracted service) from the network element management system -vlan-T);

Described OLT establishes the data channel with Broadband Remote Access Server (Broadband Remote Access Server, BRAS) according to described S-VLAN-T and C-VLAN-T, and obtains the wide area network (Wide Area Network (Wide) that BRAS allocates for described virtual network unit. Area Network, WAN) IP address.
The method according to claim 2, characterized in that, after the OLT obtains the WAN IP address, it sends a service registration request to the configuration server, and the service registration request includes the WAN IP address.
The method according to claim 2 or 3, wherein after the OLT passes the authentication of the first ONU, the method further comprises: the OLT assigning a Local Area Network (LAN) IP to the user equipment address, where the user equipment is the user equipment that communicates with the OLT through the first ONU.
The method according to any one of claims 2-4, wherein after the OLT passes the authentication of the first ONU, the method further comprises: assigning the S-VLAN-T and C to the OLT -Private Virtual Local Area Network Tag (P-VLAN-T) corresponding to VLAN-T, and after receiving the registration request of the first ONU, send the P-VLAN-T to the First ONU.
The method of claim 5, wherein the method further comprises:

Described OLT receives the first message from described first ONU, the message header of described first message includes described P-VLAN-T, the LAN IP address of described user equipment and described virtual network unit's IP address. Media Access Control (MAC) address;

The OLT sends a second packet to a Broadband Remote Access Server (BRAS), where the second packet includes the data part of the first packet, and the second packet further includes the S-VLAN-T, the C-VLAN-T and the WAN IP address.
The method according to claim 6, wherein the service parameter includes at least one of account number, user name, password and other information, and the message sent by the OLT to the BRAS includes the service parameter.
The method of claim 5, wherein the method further comprises:

Described OLT receives the 3rd message from BRAS, described 3rd message comprises described S-VLAN-T, described C-VLAN-T and described WAN IP address;

Described OLT sends the 4th message to described first ONU, described 4th message comprises the data part of described 3rd message, also comprises the LAN IP address of described P-VLAN-T and described user equipment .
The method according to claim 5, wherein the registration identifier of the at least one ONU further includes the registration identifier of the second ONU, and the method further comprises that the OLT receives the registration request of the second ONU, and sends the registration request to the ONU. The P-VLAN-T is sent to the second ONU.
The method of claim 12, wherein the method further comprises:

The OLT receives the fifth message from the first ONU, and the header of the fifth message includes the P-VLAN-T and the Media Access Control (Media Access Control) corresponding to the second ONU. Control, MAC) address;

The OLT forwards the fifth packet to the second ONU.
The method according to any one of claims 2-10, wherein the registration identifier is a logical registration identifier, the first message includes the S-VLAN-T and C-VLAN-T, and the OLT After receiving the first message, the virtual network element is created on the OLT using virtualization technology.
The method according to any one of claims 2-10, wherein the registration identifier is a device serial number, and before the OLT receives the first message, the method further comprises:

The OLT receives a second message from the network element management system, and the second message includes the S-VLAN-T and the C-VLAN-T;

After the OLT receives the second message, the virtual network unit is created on the OLT using a virtualization technology.
The method according to claim 12, wherein after the OLT receives the second message, the method further comprises: the OLT assigns a device serial number to the virtual network unit, and assigns the device serial number to the virtual network unit. The device serial number of the virtual network element is sent to the network element management system.
The method according to any one of claims 1-13, wherein the OLT includes a plurality of the virtual network units, and each virtual network unit corresponds to a group of ONUs.
The method according to claim 14, wherein the first virtual network unit and its ONU correspond to the first subscription service, and the second virtual network unit and its ONU correspond to the second subscription service.
The method according to claim 14 or 15, wherein an ONU of the first virtual network unit and an ONU of the second virtual network unit are the same ONU.
An optical line terminal, characterized in that the optical line terminal includes a processor, a memory, and a transceiver, wherein,

The transceiver is used to send and receive signals or data;

the memory for storing program instructions;

The processor is configured to execute program instructions stored in the memory, and when the program is executed, the optical line terminal executes the method according to any one of claims 1-16.
A PON system, characterized in that the PON system comprises the optical line terminal as claimed in claim 17 and at least one optical network unit.