CN101420353B

CN101420353B - Method for supporting virtual private LAN service in Gbit passive optical network system

Info

Publication number: CN101420353B
Application number: CN2007101634095A
Authority: CN
Inventors: 张海林
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2007-10-22
Filing date: 2007-10-22
Publication date: 2012-04-18
Anticipated expiration: 2027-10-22
Also published as: CN101420353A

Abstract

The present invention discloses a method for supporting uplink services of virtual private local area network in a gigabit passive optical network system for providing support of virtual private local area network services to a GPON system. The method comprise steps that an optical network unit maps received service data flows to a packaging port for packaging the service data flows, adapts them to an adaption port according to virtual local area network labels, and transmits them to an optical line terminal; The optical line terminal detaches the packaging mode of the received service data flows to obtain service data flows by recovery, adds virtual local area network labels of service providers to the service data flows, maps the service data flows to corresponding virtual local area network of service providers to packet the service data flows, and sends them to the upper layer network device connected with the optical line terminal. The present invention provides a method of supporting virtual private local area network services for the GPON system.

Description

The method of virtual support private LAN service in the Gbit passive optical network system

Technical field

The present invention relates to GPON (Gigabit Passive Optical Network, gigabit passive optical network) specifically, relate to the method for virtual support private LAN service in a kind of GPON system.

Background technology

Broadband network develop rapidly in recent years; Various high bandwidths are professional to be occurred with using constantly; Make DSLAM (Digital Subscriber Line Access Multiplexer; Digital Subscriber Line Access Multiplexer) dispose trend towards disperseing to move down, fully near the user, to improve more high bandwidth and higher-quality broadband inserting service.The optical fiber access technology is fast-developing; GPON, EPON PON (Passive Optical Network, EPON) technology such as (Ethernet Passive OpticalNetwork, ethernet passive optical networks) reach its maturity; Though in the long run; The light access technology possesses long distance symmetry advantage at a high speed, and FTTH (Fiber To The Home, Fiber to the home) is desirable broadband access method; But at present because aspects such as cost and demand temporarily are difficult to settle at one go substituting existing copper wire technology fully.Therefore, concerning operator, making full use of and optimize existing copper cash resource, exploit potentialities to greatest extent, on the basis of suitably dropping into, progressively realize " light advances copper and moves back ", is the main direction of development in a period of time from now in the field such as broadband access.Therefore, in the following quite a long time, " xPON+VDSL2 " will might become the principal mode that broadband access is used fully gradually.

The GPON technology is based on the comprehensive access technology of latest generation broadband passive light of ITU-TG.984.x standard; Have numerous advantages such as high bandwidth, high efficiency, large coverage, user interface are abundant, be regarded as the desirable technique that realizes that the Access Network business is broadband, synthesization is transformed by most of operators.GPON has following advantage: adopt GFP (Generic Framing Procedure; Generic Framing Procedure); After the various business dissimilar, different rates of high level are encapsulated, utilize the PON transparent transmission, thereby support existing various voice and data service; Comprise TDM (Time Division Multiplex; Time division multiplexing), PDH (Plesiochronous Digital Hierarchy, PDH), SONET (Synchronous Optical Network, Synchronous Optical Network)/SDH (Synchronous DigitalHierarchy; SDH), Ethernet (10/100 Base-T), ATM (AsynchronousTransfer Mode, asynchronous transfer mode), special line etc.; Network coverage is wide.ONU (OpticalNetwork Unit, optical network unit) physical distance can reach 20 kms farthest, and logical reach covers can reach 60 kms; Can support symmetry and asymmetric multiple line speed, maximum supporting rate can reach 2.5Gb/s, can satisfy the needs of the existing and following multiple business that possibly occur to bandwidth; Owing to adopted the GFP Generic Framing Procedure to encapsulate, improved the efficient of data encapsulation, reach as high as 97%, thereby reduced cost relatively, help the promotion and application of system.

GPON is as a kind of emerging light access technology, and its technical characterictic and traditional access technology have a lot of differences.Its main difference is that the connection between optical line terminal and optical network unit is the encapsulation that the GPON packaged type that adopts carries out.All business data flows all will pass through this encapsulation between optical line terminal and optical network unit, to transmit in this process.It is one of basic demand of all telecom operators at present that service quality guarantees, how in the broadband cabled connecting system that has used the GPON technology, to guarantee the virtual private LAN service service, is the problem that needs emphasis to solve.

Summary of the invention

Technical problem to be solved by this invention is to be to provide the method that provides support for virtual private LAN service in a kind of GPON system, realizes that to be embodied as the GPON system virtual private LAN service provides support.

In order to solve the problems of the technologies described above, the invention provides the method for virtual support private LAN uplink service in a kind of Gbit passive optical network system, comprising:

(1) user's that the virtual private LAN service is provided that the optical network unit of Gbit passive optical network system will receive business data flow is mapped to encapsulation port and encapsulates;

(2) business data flow of said optical network unit after said encapsulation is fitted to the adaptive port of gigabit passive optical network according to virtual local area network tags, is transferred to the optical line terminal of said Gbit passive optical network system;

(3) said optical line terminal is separated the encapsulation mode of the business data flow that receives, the business data flow of virtual local area network tags that recovered packed sign;

(4) said optical line terminal adds service supplier's virtual local area network tags on the said business data flow that recovers; And according to said service supplier's virtual local area network tags business data flow is mapped to corresponding service provider VLAN and encapsulates, send to the upper layer network equipment that said optical line terminal connects.

The method of virtual support private LAN uplink service in the above-mentioned Gbit passive optical network system, optical network unit is mapped to said encapsulation port with said business data flow described in the step (1), can not change the Priority flag in the said business data flow.

Further, optical network unit described in the step (1) can be mapped to independently said encapsulation port with said business data flow according to the Priority flag in the said business data flow.And optical network unit described in the step (1) can be mapped to a said encapsulation port with said business data flow, does not distinguish said Priority flag.

The present invention also provides the method for virtual support private LAN downlink business in a kind of Gbit passive optical network system, comprising:

(a) optical line terminal of Gbit passive optical network system is separated the VLAN encapsulation of the business data flow of the upper layer network equipment transmission that receives;

(b) said optical line terminal is according to the service supplier's virtual local area network tags in the said business data flow of separating after the encapsulation; Be mapped to corresponding encapsulation port to business data flow and encapsulate, and the business data flow after the said encapsulation is sent to the optical network unit of said Gbit passive optical network system;

(c) said optical network unit is separated the encapsulation mode of the business data flow that receives;

(d) said optical network unit is mapped to said business data flow of separating after the encapsulation mode user port that the virtual private LAN service is provided accordingly.

The inventive method provides a kind of method of virtual support private LAN service for the GPON system.

Description of drawings

Fig. 1 is the inventive method application scenarios embodiment sketch map.

Fig. 2 is a step sketch map of supporting the method embodiment of up virtual private LAN service in the inventive method in the GPON system.

Fig. 3 is a kind of mapping mode of virtual private LAN map of services module to source traffic.

Fig. 4 is a step sketch map of supporting the method embodiment of descending virtual private LAN service in the inventive method in the GPON system.

Embodiment

For making the object of the invention, technical scheme and advantage clearer, the present invention is done to specify further below in conjunction with accompanying drawing.

For GPON system uplink direction, optical network unit is a transmitting terminal, and optical line terminal is a receiving terminal; The down direction optical line terminal is a transmitting terminal, and optical network unit then is a receiving terminal.Shown in Figure 1 is the inventive method application scenarios embodiment sketch map; Technical scheme of the present invention relates to the virtual private LAN map of services module 110 and G-PON Encapsulation Mode adaptation module 120 of optical network unit 100, and the virtual private LAN map of services module 210 and G-PON Encapsulation Mode adaptation module 220 of optical line terminal 200.Below in conjunction with the up direction and the down direction of business, the function of above-mentioned each module is described.

Fig. 2 shows the method flow of supporting up virtual private LAN service in the GPON system, comprises step:

Step 201, optical network unit 100 receive the user's that the virtual private LAN service is provided business data flow;

Step 202, the user service data stream that 110 pairs of the virtual private LAN map of services modules of optical network unit 100 receive shines upon, and is mapped to the GPON encapsulation port to business data flow and encapsulates; In this process, do not change, and source traffic is mapped to independently GPON potted ends slogan according to the Priority flag in the source traffic as the Priority flag in the business data flow of source traffic; Certainly, also can be mapped to a GPON encapsulation port to the whole service data flow, and not distinguish the Priority flag of source traffic according to concrete needs;

Fig. 3 shows a kind of mapping mode of 110 pairs of source traffics of virtual private LAN map of services module; The service priority of virtual private LAN user port 1 is labeled as 1 data flow and is mapped to GPON encapsulation port 1; Be mapped to GPON encapsulation port 2 and the service priority of virtual private LAN user port 1 is labeled as 2 data flow, the service priority of virtual private LAN user port 2 is labeled as 3 and 4 data flow and is mapped to GPON encapsulation port 3 and 4 respectively;

Step 203, the G-PON Encapsulation Mode adaptation module 120 of optical network unit 100 is fitted to an adaptive port of GPON to virtual private LAN user's business data flow according to virtual local area network tags; The data flow of different virtual LAN label is fitted to different GPON encapsulation port, also promptly uses the logical channel of GPON encapsulation port as the data flow of different virtual LAN label;

Step 204, optical network unit 100 sends to optical line terminal 200 with business data flow;

Step 205, the G-PON Encapsulation Mode adaptation module 220 of optical line terminal 200 are separated the G-PON Encapsulation Mode of the data flow that receives from the GPON encapsulation port, the business data flow of virtual local area network tags that recovered packed sign;

Step 206; The virtual private LAN map of services module 210 of optical line terminal 200 is added service supplier's virtual local area network tags on business data flow; The business data flow of different virtual LAN label as required; Be mapped to the VLAN encapsulation of corresponding service provider, and send to the upper layer network equipment that optical line terminal 200 connects; In Fig. 3, the priority of encapsulation is 1 virtual private LAN data flow in the GPON encapsulation port 1, has been added service supplier's virtual local area network tags x, and has been passed to corresponding upper layer network equipment.

Fig. 4 shows the method flow of supporting descending virtual private LAN service in the GPON system, comprises step:

Step 401, optical line terminal 200 receives the business data flow that upper layer network equipment sends;

Step 402, the virtual private LAN map of services module on the optical line terminal 200 are separated the VLAN encapsulation of the service provider network of business data flow;

Step 403, the GPON encapsulation adaptation module 220 of optical line terminal 200 is mapped to corresponding GPON encapsulation port to the business data flow that receives and encapsulates according to the service supplier's virtual local area network tags in the business data flow;

Continuation is with reference to figure 3; If service supplier's virtual local area network tags is the business data flow of x; Then the Service Switching Module on the optical line terminal 200 is separated the VLAN encapsulation of service provider network, and sends to corresponding GPON encapsulation port 1 to packet according to the service supplier's virtual local area network tags x in the packet;

Step 404, the business data flow after optical line terminal 200 will encapsulate sends to optical network unit 100;

After step 405, optical network unit 100 receive the business data flow that sends from optical line terminal 200, separate the G-PON Encapsulation Mode of this business data flow;

Step 406; The virtual private LAN map of services module 110 of optical network unit 100 has been mapped to the corresponding user port that the virtual private LAN service is provided to the business data flow of separating after the encapsulation mode as required; The business data flow that passes over like GPON encapsulation port 1 then directly is sent to the user port 1 that virtual private LAN service is provided; And can not transmit according to purpose MAC (adapter) address, to satisfy the safety requirements of virtual private LAN.

The inventive method has been considered the peculiar technical characterictic of GPON system uplink direction, and a kind of method of virtual support private LAN service is provided for the GPON system.

Claims

1. the method for virtual support private LAN uplink service in the Gbit passive optical network system is characterized in that, comprising:

(4) said optical line terminal adds service supplier's virtual local area network tags on the said business data flow that recovers; And according to said service supplier's virtual local area network tags business data flow is mapped to corresponding service supplier's VLAN and encapsulates, send to the upper layer network equipment that said optical line terminal connects.

2. the method for virtual support private LAN uplink service in the Gbit passive optical network system as claimed in claim 1 is characterized in that:

Optical network unit is mapped to said encapsulation port with said business data flow described in the step (1), does not change the Priority flag in the said business data flow.

3. the method for virtual support private LAN uplink service in the Gbit passive optical network system as claimed in claim 2 is characterized in that:

Optical network unit further is mapped to independently said encapsulation port according to the Priority flag in the said business data flow with said business data flow described in the step (1).

4. the method for virtual support private LAN uplink service in the Gbit passive optical network system as claimed in claim 2 is characterized in that:

Optical network unit is mapped to a said encapsulation port with said business data flow described in the step (1), does not distinguish said Priority flag.

5. the method for virtual support private LAN downlink business in the Gbit passive optical network system is characterized in that, comprising: