CN101425944B - Method for service bearing in G bit passive optical network system - Google Patents
Method for service bearing in G bit passive optical network system Download PDFInfo
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- CN101425944B CN101425944B CN2007101637676A CN200710163767A CN101425944B CN 101425944 B CN101425944 B CN 101425944B CN 2007101637676 A CN2007101637676 A CN 2007101637676A CN 200710163767 A CN200710163767 A CN 200710163767A CN 101425944 B CN101425944 B CN 101425944B
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Abstract
The invention discloses a service bearing method for G bit passive optical network system comprising following steps: 1) when optical network unit receives uplink service data stream from user side, separately marking virtual LAN label of the data stream, adapting the service data stream of different virtual LAN label to adapting port of G bit passive optical network GPON, transmitting to optical line terminal; 2) the optical line terminal restores packaged data stream of different virtual LAN label from the GPON package port, mapping the data stream of different virtual LAN label to virtual LAN of different HSP for package to implements service bearing of G bit passive optical network system. The invention provides a method for solving service bearing in GPON access technology.
Description
Technical field
The present invention relates to use the cable broadband access communication system of GPON (Gigabit Passive Optical Network, Gigabit Passive Optical Network) technology, relate in particular to service bearing method in a kind of GPON system.
Background technology
Broadband network develop rapidly recent years, various high bandwidths are professional and use continuous the appearance, make DSLAM (Digital Subscriber Line Access Multiplexer) dispose to trend towards disperse to move down, fully near the user, to improve more high bandwidth and higher-quality broadband inserting service.The fast development of optical fiber access technology, GPON, EPON (Ethernet Passive Optical Network, Ethernet passive optical network) etc. technology reaches its maturity, though in the long run, the light access technology possesses long distance symmetry advantage at a high speed, Fiber to the home (FTTH) is desirable broadband access method, but at present because aspects such as cost and demand temporarily are difficult to settle at one go complete instead of copper line technology.Therefore, concerning operator, making full use of and optimize existing copper cash resource, exploit potentialities to greatest extent, progressively realize " light advances copper and moves back " on the basis of suitably dropping into, is the main direction of development in a period of time from now on.In following a period of time, " xPON (x Passive Optical Network; various EPONs)+VDSL2 (Very highrate Digital Subscriber Line 2, very high speed digital subscriber lines 2) " will become the principal mode that broadband access is used 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 considered 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), various dissimilar to high level, after encapsulating, the business of different rates utilizes PON (Passive OpticalNetwork, EPON) transparent transmission, thereby support existing various voice and data service, comprise TDM (Time Division Multiplexing, time division multiplexing), PDH (PlesiochronousDigital Hierarchy, PDH (Pseudo-synchronous Digital Hierarchy)), SONET (Synchronous Optical Network, Synchronous Optical Network)/SDH (Synchronous Digital Hierarchy, synchronous digital hierarchy), (10/100 Base-T (is a kind of local area network standard with the work of 10/100Mbps speed to Ethernet (Ethernet), it is commonly called Fast Ethernet)), ATM (Asynchronous Transfer Mode, asynchronous transfer mode), special line etc.; Network coverage is wide.The optical network unit physical distance can reach 20km farthest, and logical reach covers can reach 60km; 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 miscellaneous service that may 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 be encapsulated between optical line terminal and the optical network unit through this and transmit in this process.Because the Internet is popular, IP uses increasingly extensive, IP network has been infiltrated various traditional communication ranges, make up a multibusiness network based on IP and become possibility, professional as at present popular IPTV (Web TV) business and VoIP (networking telephone) etc., this requires the access device in access network to want the multi-service tenability can be provided, and how business carries the emphasis problem that need solve at GPON packaged type and Ethernet packaged type.
Summary of the invention
The invention provides service bearing method in a kind of Gigabit Passive Optical Network system, to solve the problem of service bearer in the GPON system.
In order to solve the problems of the technologies described above, the invention provides service bearing method in a kind of Gigabit Passive Optical Network system, comprise the steps:
(1) after optical network unit receives from the uplink business data of user side stream, identify the virtual local area network tags of described data flow respectively, then the business data flow of described different virtual LAN label is fitted to the adaptive port encapsulation of different Gigabit Passive Optical Network GPON respectively, sends to optical line terminal;
(2) after described optical line terminal is received, from described GPON encapsulation port, recover the data flow of packed described different virtual LAN label, the data flow of described different virtual LAN label is mapped to the VLAN encapsulation of different service providers as required, to realize service bearer in the described Gigabit Passive Optical Network system.
The method of the invention, wherein, described optical line terminal sends to the upper layer network equipment that described optical line terminal connects after the data flow of described different virtual LAN label is mapped to different service provider's VLAN encapsulation as required.
The method of the invention, wherein, described upper layer network device processes and send downlink service data stream after, comprise the steps:
(a) after described optical line terminal is received the downlink service data stream of described upper layer network equipment transmission, at first separate the VLAN encapsulation of service provider network, then described service supplier's virtual LAN services data flow is mapped to different GPON encapsulation port encapsulation respectively, and sends to optical network unit;
(b) after described optical network unit is received, separate the G-PON Encapsulation Mode of described business data flow, then described data flow is sent to corresponding user.
The method of the invention, wherein, in the step (1), identify the virtual local area network tags of described data flow respectively by the professional mapping block of described optical network unit, the encapsulation adaptation module by described optical network unit is fitted to the adaptive port encapsulation of different Gigabit Passive Optical Network GPON to the business data flow of described different virtual LAN label respectively then.
The method of the invention, wherein, the professional mapping block of described optical network unit identifies the virtual local area network tags of described data flow respectively according to the input port of business data flow.
The method of the invention, wherein, the label of described VLAN comprises VLAN ID and priority tag.
The method of the invention, wherein, in the step (2), from described GPON encapsulation port, recover the data flow of packed described different virtual LAN label by the encapsulation adaptation module of described optical line terminal, the data flow of described different virtual LAN label is mapped to different service provider's VLAN encapsulation as required by the Service Switching Module of described optical line terminal.
The method of the invention, wherein, in the step (a), the VLAN of being separated service provider network by the Service Switching Module of described optical line terminal encapsulates, and the encapsulation adaptation module by described optical line terminal is mapped to different GPON encapsulation port encapsulation to described service supplier's virtual LAN services data flow respectively then.
The method of the invention wherein, in the step (b), is separated the G-PON Encapsulation Mode of described business data flow by the encapsulation adaptation module of described optical network unit, by described optical network unit described data flow is sent to corresponding user then.
The invention provides and a kind ofly in the system that has used the GPON access technology, solve service bearing method.
Description of drawings
Fig. 1 is the hardware module project organization figure that the embodiment of the invention realizes service bearer;
Fig. 2 is an application example business datum method for stream processing schematic diagram of the present invention;
Fig. 3 is an application example up direction business data flow process chart of the present invention;
Fig. 4 is an application example down direction business data flow process chart of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described in detail.
As shown in Figure 1, the embodiment of the invention realizes the hardware module project organization figure of service bearer, comprises the professional mapping block of optical network unit, the encapsulation adaptation module of optical network unit, the encapsulation adaptation module of optical line terminal, the Service Switching Module of optical line terminal; Wherein, the professional mapping block of optical network unit links to each other with the encapsulation adaptation module of optical network unit, the encapsulation adaptation module of optical line terminal links to each other with the Service Switching Module of optical line terminal, connect by optical fiber between optical line terminal and the optical network unit, it realizes that service bearing method comprises the steps:
Step 101, after optical network unit receives from the uplink business data of user side stream, the professional mapping block of optical network unit identifies the virtual local area network tags of described data flow respectively according to the input port of business data flow, sends to the encapsulation adaptation module of optical network unit then; The virtual local area network tags of sign comprises VLAN ID and priority tag, and emphasis is that each isolated user port uses identical VLAN tag, and perhaps every of each user business data flow with independent characteristic uses identical mark;
Step 102, the encapsulation adaptation module of optical network unit is fitted to the adaptive port encapsulation of different GPON to the business data flow of described different virtual LAN label respectively: the business data flow that has identified identical virtual local area network tags is fitted to the adaptive port encapsulation of same GPON, the data flow of different virtual LAN label is fitted to other GPON encapsulation port encapsulation, promptly use the logical channel of GPON encapsulation port, send to optical line terminal then as the data flow of different virtual LAN label;
Step 103, after optical line terminal was received, the encapsulation adaptation module of optical line terminal recovered the data flow of packed described different virtual LAN label from described GPON encapsulation port, sent to the Service Switching Module of optical line terminal then;
Step 104, the Service Switching Module of optical line terminal is mapped to different service provider's VLAN encapsulation as required to the data flow of described different virtual LAN label, and sends to the upper layer network equipment that optical line terminal connects;
Step 105, the upper layer network device processes also sends downlink service data stream, receive the downlink service data stream of described upper layer network equipment transmission when described optical line terminal after, the Service Switching Module of described optical line terminal is separated the VLAN encapsulation of service provider network, sends to the encapsulation adaptation module of optical line terminal then;
Step 106, the encapsulation adaptation module of optical line terminal is mapped to different GPON encapsulation port encapsulation to described service supplier's virtual LAN services data flow respectively, and sends to optical network unit by optical fiber;
Step 107, after optical network unit was received, the encapsulation adaptation module of described optical network unit was separated the G-PON Encapsulation Mode of described business data flow;
Step 108, optical network unit sends to corresponding user to described data flow then.
As shown in Figure 2, during each module in the Fig. 1 that flows through of application example business datum method for stream processing schematic diagram of the present invention, business data flow, each module is finished the processing to business data flow:
Wherein, up direction as shown in Figure 3, application example up direction business data flow handling process of the present invention comprises the steps:
After step 301, optical network unit received user's uplink business data stream, the professional mapping block of optical network unit identified the virtual local area network tags of described data flow respectively, sends to the encapsulation adaptation module of optical network unit then; The possible mode that identifies this label is according to user's physical port number, the port of user side may be various forms such as ADSL (Asymmetric Digital Subscriber Line, asymmetrical digital user line), SHDSL (Single-pair High-speed Digital Subscriber Line, single to highspeed user's digital circuit), VDSL (Very high bit-rate Digital Subscriber Line, very high speed digital subscriber lines), the label of the VLAN in the packet after the sign is unique, and this label comprises VLAN ID and priority tag.The data flow of the data flow of user port 1 and user port 2 identifies according to logic port respectively as shown in Figure 2, and with VLAN ID VLAN (VLAN) 2, VLAN3, VLAN4, the VLAN5 transmission of classifying, the data flow virtual local area network tags of this process user side can be converted into the independent identification that needs;
Step 302, the encapsulation adaptation module of optical network unit is fitted to the adaptive port encapsulation of same GPON to the business data flow that has identified identical virtual local area network tags, the data flow of different virtual LAN label is fitted to other GPON encapsulation port encapsulation, promptly use the logical channel of GPON encapsulation port, send to optical line terminal by optical fiber then as the data flow of different virtual LAN label; In Fig. 2, the data flow of VLAN2, VLAN3, VLAN4, VLAN5 is mapped to one respectively, and independently GPON encapsulation port GPON encapsulation port 1, GPON encapsulation port 2, GPON encapsulation port 3, GPON encapsulation port 4 encapsulate the back transmission;
Step 303, the encapsulation adaptation module of optical line terminal recovers packed same line of business data flow from the GPON encapsulation port, the business datum stream format of taking-up is the Ethernet bag of the band virtual local area network tags of GPON encapsulation port before adaptive on optical network unit;
Step 304, the Service Switching Module of optical line terminal adds different service provider's VLAN encapsulation as required to the data flow of different business, and sends to the upper layer network equipment that optical line terminal connects; Be added service supplier's virtual local area network tags VLANx respectively as the data flow of VLAN2, VLAN3 among Fig. 2, the data flow of VLAN4, VLAN5 has been added service supplier's virtual local area network tags VLANy (the Data Stream Processing process of user port 3 is similar) respectively; This process will guarantee that the business data flow of different GPON encapsulation port can be mapped to unique service supplier's virtual local area network tags group, guarantees that perhaps service supplier's label is unique.
The upper layer network device processes also sends downlink service data stream, wherein, down direction as shown in Figure 4, application example down direction business data flow handling process of the present invention comprises the steps:
Step 401, after optical line terminal receives the downlink service data stream that upper layer network equipment sends, the Service Switching Module of optical line terminal is at first separated the VLAN encapsulation of service provider network, sends to the encapsulation adaptation module of optical line terminal then;
Step 402, the encapsulation adaptation module of optical line terminal is mapped to different GPON encapsulation port encapsulation to each the service supplier's virtual LAN services that receives respectively, sends to optical network unit by optical fiber then;
When step 403, optical network unit received from the business data flow that optical line terminal sends, its encapsulation adaptation module was separated G-PON Encapsulation Mode;
Step 404, optical network unit sends to corresponding user to data flow.
Scheme of the present invention is not restricted to listed utilization in specification and the execution mode.Concerning the technology of the present invention those of ordinary skill in the field, can make various corresponding changes and distortion according to the present invention, and all these corresponding changes and distortion all belong to the protection range of claim of the present invention.
Claims (9)
1. service bearing method in the Gigabit Passive Optical Network system is characterized in that, comprises the steps:
(1) after optical network unit receives from the uplink business data of user side stream, identify the virtual local area network tags of described data flow respectively, then the business data flow of different virtual LAN label is fitted to the adaptive port encapsulation of different Gigabit Passive Optical Network GPON respectively, sends to optical line terminal;
(2) after described optical line terminal is received, from described GPON encapsulation port, recover the data flow of packed described different virtual LAN label, the data flow of described different virtual LAN label is mapped to the VLAN encapsulation of different service providers as required, to realize service bearer in the described Gigabit Passive Optical Network system.
2. method according to claim 1, it is characterized in that, described optical line terminal sends to the upper layer network equipment that described optical line terminal connects after the data flow of described different virtual LAN label is mapped to different service provider's VLAN encapsulation as required.
3. as method as described in the claim 2, it is characterized in that, described upper layer network device processes and send downlink service data stream after, comprise the steps:
(a) after described optical line terminal is received the downlink service data stream of described upper layer network equipment transmission, at first separate the VLAN encapsulation of service provider network, then described service supplier's virtual LAN services data flow is mapped to different GPON encapsulation port encapsulation respectively, and sends to optical network unit;
(b) after described optical network unit is received, separate the G-PON Encapsulation Mode of described business data flow, then described data flow is sent to corresponding user.
4. method according to claim 1, it is characterized in that, in the step (1), identify the virtual local area network tags of described data flow respectively by the professional mapping block of described optical network unit, the encapsulation adaptation module by described optical network unit is fitted to the adaptive port encapsulation of different Gigabit Passive Optical Network GPON to the business data flow of described different virtual LAN label respectively then.
5. as method as described in the claim 4, it is characterized in that the professional mapping block of described optical network unit identifies the virtual local area network tags of described data flow respectively according to the input port of business data flow.
6. method according to claim 1 is characterized in that the label of described VLAN comprises VLAN ID and priority tag.
7. method according to claim 1, it is characterized in that, in the step (2), from described GPON encapsulation port, recover the data flow of packed described different virtual LAN label by the encapsulation adaptation module of described optical line terminal, the data flow of described different virtual LAN label is mapped to different service provider's VLAN encapsulation as required by the Service Switching Module of described optical line terminal.
8. as method as described in the claim 3, it is characterized in that, in the step (a), the VLAN of being separated service provider network by the Service Switching Module of described optical line terminal encapsulates, and the encapsulation adaptation module by described optical line terminal is mapped to different GPON encapsulation port encapsulation to described service supplier's virtual LAN services data flow respectively then.
9. as method as described in the claim 3, it is characterized in that, in the step (b), separate the G-PON Encapsulation Mode of described business data flow, by described optical network unit described data flow is sent to corresponding user then by the encapsulation adaptation module of described optical network unit.
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| CN2007101637676A CN101425944B (en) | 2007-10-30 | 2007-10-30 | Method for service bearing in G bit passive optical network system |
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| CN2007101637676A CN101425944B (en) | 2007-10-30 | 2007-10-30 | Method for service bearing in G bit passive optical network system |
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| CN101425944B true CN101425944B (en) | 2011-01-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102480652B (en) * | 2010-11-29 | 2014-09-10 | 中兴通讯股份有限公司 | Method for mapping service flow and ONT (Optical Network Termination) |
| CN107786299B (en) * | 2016-08-25 | 2021-06-08 | 华为技术有限公司 | Method, device and network system for sending and receiving service |
| CN109104372B (en) * | 2018-08-23 | 2021-04-30 | 郑州云海信息技术有限公司 | Network docking method, device and system and storage medium |
| CN117201434A (en) * | 2023-11-07 | 2023-12-08 | 杭州初灵信息技术股份有限公司 | Ethernet data interaction method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507206A (en) * | 2002-12-06 | 2004-06-23 | 北京格林威尔科技发展有限公司 | Transmission method of circuit service in passive light network based on Ethernet |
| CN1614944A (en) * | 2003-11-06 | 2005-05-11 | 北京邮电大学 | Dynamic distribution control of upward band width in passive optical network |
| CN1725756A (en) * | 2005-07-21 | 2006-01-25 | 上海交通大学 | Passive optical network system based on generalized multiprotocol label switching (GMPLS) protocol |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507206A (en) * | 2002-12-06 | 2004-06-23 | 北京格林威尔科技发展有限公司 | Transmission method of circuit service in passive light network based on Ethernet |
| CN1614944A (en) * | 2003-11-06 | 2005-05-11 | 北京邮电大学 | Dynamic distribution control of upward band width in passive optical network |
| CN1725756A (en) * | 2005-07-21 | 2006-01-25 | 上海交通大学 | Passive optical network system based on generalized multiprotocol label switching (GMPLS) protocol |
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