CN102316388B - Selective QinQ implementation method in a kind of passive optical network and device thereof - Google Patents

Abstract

The invention discloses a flexible QinQ implementation method in a PON system and its device. The method includes: dividing the ONUs under the OLT interface in the PON system into a plurality of ONU groups; Add the same group logo first SVLAN logo in the text, and the first SVLAN logo of each ONU group is different from each other; OLT revises the group logo first SVLAN logo in the user message to the corresponding service logo second SVLAN logo; thereby realizing The flexible QinQ technology based on the ONU group increases the number and scale of ONUs and improves the service capacity of the system.

Description

Flexible QinQ implementation method and device in a passive optical network system

technical field

The invention relates to a method and a device for realizing QinQ services in a broadband access network system, in particular to a method for realizing flexible QinQ services in a PON (Passive Optical Network, Passive Optical Network) system and related devices.

Background technique

The flexible QinQ function is the function of adding different outer layer SVLAN (StackVLAN, stack virtual local area network) tags before the user's original packet VLAN (virtual local area network) TAG (label) based on different service data flows, see Figure 1, including:

(1) According to different CVLAN (CustomerVLAN, user virtual local area network) ranges in the user data flow, put on different outer layer SVLAN labels;

(2) According to different Ethernet protocol types in the user data stream, such as PPPOE/IPOE/ARP, put different outer layer SVLAN labels;

(3) According to the priority of the user data flow, label different outer layer SVLANs.

Currently, flexible QinQ is widely used in PON system equipment. In the actual networking, the PONOLT (OpticalLineTerminal, optical line terminal) device is connected to many PONONU (OpticalNetworkUnit, optical network unit) through the optical splitter (which can replace the previous layer 2 switch), and the ONU is connected to the DSLAM (DigitalSubscriberLineAccessMultiplexer, digital subscriber line access Multiplexer) and other equipment, it is required that PONOLT can realize the function of a part of the metropolitan area network aggregation switch, and put different outer VLAN tags according to different service data flows before the original message VLAN tags to realize service identification.

There are generally two scenarios in the application:

(1) Flexible QinQ based on the OLT interface, that is, it is required to add different outer SVLAN labels for different service flows under different PONOLT interfaces. In this scenario, only the OLT interface can be identified, and the relevant ONU cannot be specifically located. At the same time, the range of CVLANs that can be used by different ONUs under the OLT interface is also limited.

(2) Flexible QinQ based on the ONU interface, that is, it is required to add different outer layer SVLAN labels for different service flows under different PONONU interfaces. In this scenario, the hardware resources occupied by different ONU interfaces are independent, and the scale of the number of ONUs under the OLT interface is limited by the resources of the entire system, which generally cannot meet the requirements of practical applications.

Contents of the invention

The main purpose of the present invention is to solve the problem that the flexible QinQ based on the OLT interface in the existing PON system cannot be specifically positioned to the relevant ONU, so that the range of CVLANs that can be used by different ONUs under the OLT interface is also limited; and the flexible QinQ based on the ONU interface in the PON system The scale of the number of ONUs under the OLT interface is easily limited by the resources of the entire system. A flexible QinQ implementation method in the passive optical network system is proposed. Under the OLT interface, the ONU can be located and the ONU’s capacity is expanded. Quantity scale.

According to one aspect of the present invention, a flexible QinQ implementation method in a PON system is provided, including: dividing the ONUs under the OLT interface in the PON system into a plurality of ONU groups; in the message sent to the OLT by each ONU group Add the first SVLAN identifier of the same group identifier, and the first SVLAN identifier of each ONU group is different from each other; the OLT modifies the first SVLAN identifier of the group identifier in the user message to the second SVLAN identifier of the corresponding service identifier.

Wherein, dividing the ONU under the OLT interface in the PON system into multiple ONU groups includes: dividing the ONU under the OLT interface in the PON system into multiple ONU groups according to the networking type; or

The ONUs under the OLT interface in the PON system are divided into multiple ONU groups according to business functions.

Wherein, the ONU under the OLT interface in the PON system is divided into a plurality of ONU groups according to the networking type, and the networking type includes at least one of the following:

FTTH networking type, FTTB networking type, FTTB+LAN networking type, FTTB+DSL networking type.

Wherein, OLT revises the group identification first SVLAN identification in the user message to the corresponding service identification second SVLAN identification including:

According to the service and user information identified by the VLAN in the user message in each ONU group, the OLT, combined with the configured flexible QinQ rules, modifies the group ID first SVLAN ID before the VLAN in the user message to the corresponding service ID second SVLAN .

According to another aspect of the present invention, the invention provides a flexible QinQ implementation device in a PON system, including an OLT and an ONU under the OLT interface, and the OLT also includes: a division module, which divides the ONU into a plurality of ONU groups; adding modules, Add the message sent to the OLT in each ONU group to add the first SVLAN identifier of the same group identifier that distinguishes other ONU groups, and the first SVLAN identifier of each ONU group is different from each other; modify the module to add the group identifier in the user message The first SVLAN identifier is changed to the corresponding service identifier second SVLAN identifier.

Wherein, the division module is used to divide the ONU into multiple ONU groups according to the networking type; or is used to divide the ONU into multiple ONU groups according to the service function.

The modification module is used to modify the first SVLAN identification of the group identification before the VLAN in the user message to the corresponding service according to the business and user information identified by the VLAN in the user message in each ONU group, combined with the configured flexible QinQ rules Identifies the second SVLAN.

Compared with the prior art, the beneficial effects of the present invention are: the present invention divides a plurality of ONU interfaces of the same type into the same group by grouping the ONU interfaces under each PONOLT interface that accesses the core network according to its type, Add a layer of SVLAN label to identify the group information of the ONU before the original user VLAN on the message sent from the ONU to PONOLT, thus realizing the flexible QinQ technology based on the ONU group, increasing the number and scale of the ONU, and improving the system efficiency. business capacity.

Compared with the prior art, the method of the invention overcomes the respective shortcomings of the flexible QinQ based on the OLT interface and the ONU interface, and realizes the effective fusion of the two.

Description of drawings

FIG. 1 is a schematic diagram of a functional structure of an existing QinQ;

Fig. 2 is the flowchart of flexible QinQ implementation method in the PON system of the present invention;

FIG. 3 is a schematic diagram of a flexible QinQ implementation process according to an embodiment of the present invention;

FIG. 4 is a structural block diagram of a device for implementing flexible QinQ in the PON system of the present invention.

detailed description

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

A flexible QinQ implementation method in a PON system, the specific process of the method is as shown in Figure 2,

S11, divide the ONU under the OLT interface in the PON system into a plurality of ONU groups;

S12, adding the first SVLAN identifier of the same group identifier in the message sent to the OLT by each ONU group, and the first SVLAN identifier of each ONU group is different from each other;

S13. The OLT modifies the group identifier first SVLAN identifier in the user message to a corresponding service identifier second SVLAN identifier.

Among them, the ONU under the OLT interface in the PON system is divided into multiple ONU groups according to its networking type, as shown in Figure 3, in the PON system, according to FTTH, FTTB+LAN, FTTB+DSL multiple ONU networking Type of business access scenarios, the specific implementation method is as follows:

ONU1-10 is an FTTH scenario and is classified as ONU group 1. ONU11-20 is an FTTB+LAN scenario and is classified as ONU group 2. ONU21-30 is an FTTB+DSL scenario and is classified as ONU group 3.

Each ONU has high-speed Internet access, IPTV, and VOIP three services, among which HIS (Highspeed Internet Service) means high-speed Internet service.

In order to identify the ONU group information, the message sent to PONOLT by the ONU in the ONU group adds a layer of group identification first SVLAN before the original user VLAN, where ONU group 1 is 4090, ONU group 2 is 4091, and ONU group 3 is 4092, used to identify the information of the ONU group it belongs to.

When the three data streams of high-speed Internet access, IPTV, and VOIP of ONU group 1, ONU group 2, and ONU group 3 are sent to the core network by PONOLT, the second SVLAN of the outer layer service identifier that needs to be marked, ONU group 1 is respectively 4000, 4002, 4001. ONU group 2 is 4010, 4012, 4011 respectively. ONU group 3 is 4020, 4022, 4021 respectively. Therefore, a flexible QinQ implementation method for ONU groups in the PON system is realized.

Among them, the ONU under the OLT interface in the PON system is divided into multiple ONU groups according to the service function, and the QinQ implementation method after the ONU group is divided is basically the same as the QinQ implementation method after the above-mentioned division according to the network type, and will not be repeated here. .

The invention also provides a device for implementing flexible QinQ in a PON system, including an OLT and an ONU, wherein the OLT further includes a dividing module, an adding module and a modifying module.

Among them, the division module divides the ONU under the OLT interface in the PON system into multiple ONU groups; the addition module adds the first SVLAN of the same group identification that distinguishes other ONU groups to all messages in each ONU group; the modification module, PONOLT According to the difference of the VLANs in the user messages in each ONU group, modify the first SVLAN of the group identification in the user messages to the second SVLAN of the service identification.

The dividing module divides the ONU into multiple different ONU groups according to the networking type, and the same type of ONU forms an ONU group; then, through the adding module, a layer is added to the message sent to the OLT module before the original user VLAN to identify its location The first SVLAN label of the ONU group, the OLT module accepts the ONU group information, and combines the configured flexible QinQ rules to modify the first SVLAN label that identifies the ONU group information on the outer layer to the second SVLAN label required by the actual business through the modification module .

The invention divides multiple ONU interfaces of the same type into the same group by grouping the ONU interfaces under each PONOLT interface connected to the core network according to its type, so that the message sent to the PONOLT on the ONU is placed before the original user VLAN. A layer of SVLAN is added to identify the group information of the ONU, so that the number and scale of ONU can be increased, and the flexible QinQ based on the OLT interface in the existing PON system cannot specifically locate the relevant ONU, so that different ONUs under the OLT interface can be used. The scope of the CVLAN is also limited; and the flexible QinQ based on the ONU interface in the PON system is likely to make the scale of the number of ONUs under the OLT interface limited by the resources of the entire system. By adding the first SVLAN identifier to identify the ONU group it belongs to before the original user VLAN in each ONU group; so that users in each group of ONUs have SVLAN identifiers that distinguish other groups, which is convenient for the flexible QinQ of the PONOLT interface to the ONU group. By modifying the first SVLAN of the users in each ONU group to the second SVLAN required by the actual business, it is convenient to process the user service information in each group of ONUs, and facilitate the flexible QinQ of the OLT interface.

Compared with the prior art, the method of the invention overcomes the respective shortcomings of the flexible QinQ based on the OLT interface and the ONU interface, and realizes the effective fusion of the two. Using this scheme, when all ONUs under the OLT interface are in one group, it is OLT interface-based flexible QinQ; when each ONU forms a group by itself, it is ONU-based flexible QinQ; in other cases, it is ONU-based Flexible QinQ for groups.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims (5)

1. a kind of flexible QinQ implementation method in the passive optical network PON system, it is characterized in that, described method comprises: According to the networking type or business function, the optical network unit ONU under the OLT interface of the optical line terminal in the PON system is divided into multiple ONU groups; In the message sent by each ONU group to the OLT, add a group identifier that distinguishes other ONU groups, and the group identifiers of each ONU group are different from each other; After the OLT receives the message added with the group identifier, the OLT modifies the group identifier in the message to a corresponding service identifier; Wherein, the group identifier is the first stack virtual local area network SVLAN identifier, and the service identifier is the second stack virtual local area network SVLAN identifier; Wherein, the flexible QinQ refers to adding different outer stack virtual local area network labels before the virtual local area network labels of the user's original packets based on different service data flows. 2. the flexible QinQ implementation method in the PON system according to claim 1, is characterized in that, described networking type comprises at least one of following: FTTH networking type, FTTB networking type, FTTB+LAN networking type, FTTB+DSL networking type. 3. the flexible QinQ implementation method in the PON system according to claim 1 is characterized in that, described OLT revises the group identification in the user message to corresponding service identification and comprises: According to the business and user information identified by the virtual local area network VLAN in the user message in each ONU group, the OLT modifies the first SVLAN identifier before the VLAN in the user message to the second SVLAN identifier in combination with the configured flexible QinQ rules. 4. a flexible QinQ implementation device in a passive optical network PON system, comprising OLT and the ONU under the OLT interface, it is characterized in that, said OLT comprises: Divide the module, divide the ONU into multiple ONU groups according to the networking type or service function; Add a module to add group identifiers for different ONU groups to the messages sent to the OLT in each ONU group, and the group identifiers of each ONU group are different from each other; The modification module modifies the group identifier in the user message to the corresponding service identifier; Wherein, the group identifier is the first stack virtual local area network SVLAN identifier, and the service identifier is the second stack virtual local area network SVLAN identifier; Wherein, the flexible QinQ refers to adding different outer stack virtual local area network labels before the virtual local area network labels of the user's original packets based on different service data flows. 5. flexible QinQ realizes device in the PON system according to claim 4, it is characterized in that, described modification module is used for according to the business and the user information that virtual local area network VLAN identifies in the user message in each ONU group, in conjunction with configured According to the flexible QinQ rule, the first SVLAN identifier before the VLAN in the user packet is changed to the second SVLAN identifier.