CN101414941A - Method for mapping business of G-bit passive optical network system - Google Patents
Method for mapping business of G-bit passive optical network system Download PDFInfo
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- CN101414941A CN101414941A CNA2007101631843A CN200710163184A CN101414941A CN 101414941 A CN101414941 A CN 101414941A CN A2007101631843 A CNA2007101631843 A CN A2007101631843A CN 200710163184 A CN200710163184 A CN 200710163184A CN 101414941 A CN101414941 A CN 101414941A
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Abstract
The invention discloses a method for service mapping in a G bit passive optical network system. The method comprises the steps as follows: (1) the service sort of user port transmission data streams is set, the service sort is set with user priority level respectively, then the mapping relation between the user priority level and a G bit passive optical network port is set; (2) when data stream is input to a user port, an optical network unit (ONU) or an optical network terminal (ONT) confirms the user priority level to be mapped to the G bit passive optical network port according to the user priority of the service sort corresponding to the user port, and the data stream of the user port is transmitted to the G bit passive optical network port. The invention simplifies the process for identifying the service type, reduces the requirement of service type identification towards equipment function performance and improves the practibility greatly.
Description
Technical field
The present invention relates to Gigabit Passive Optical Network (Gigabit Passive Optical Network, be called for short GPON) system field, relate in particular to the method for mapping business in a kind of GPON system.
Background technology
GPON is the single fiber bi-directional Optical Access Network that multiple spot (P2MP) structure is put in a kind of employing, and its canonical topology structure is the tree type.The GPON system is made up of the optical line terminal (OLT) of network side, the optical network unit (ONU) and the Optical Distribution Network (ODN) of user side, is the single fiber bi-directional system.In addition, Optical Network Terminal (ONT) is a kind of of ONU, and it can have a plurality of different access subscriber equipment connectivity ports.At down direction (OLT is to ONU), the signal that OLT sends arrives each ONU by ODN in the mode of broadcasting.At up direction (ONU is to OLT), the signal that ONU sends only can arrive OLT, and can not arrive other ONU.For fear of data collision and improve network utilisation efficient, up direction adopts TDMA (time division multiple access accesss) mode, and the data transmission of each ONU is arbitrated.ODN is made up of Passive Optical Components such as optical fiber and one or more passive optical splitters, provides optical channel between OLT and ONU.According to ONU residing position difference in Access Network, can there be several network application types in the GPON system: Fiber To The Cabinet (FTTCab), Fiber-To-The-Building space/junction box (FTTB/C), fiber-to-the-home front yard user (FTTH), optical fiber are to company/office (FTTO) etc.
As shown in Figure 1, GPON system configuration schematic diagram in this typical networking model, mainly contains two types user mode access.A kind of access way is that ONU inserts subscriber equipmenies such as computer, phone, set-top box or TV indirectly by connecting switch S (Switchboard); Another mode is that ONT directly inserts subscriber equipmenies such as computer, phone, set-top box or TV by different ports.
As shown in Figure 2, the ONU of GPON system structural representation, expression be interface on ONU (or ONT) equipment or the graph of a relation between the port, is the GPON interface comprises a plurality of T-CONT, and (what Chinese?), T-CONT includes a plurality of virtual GEM (GPON Encapsulation Mode, G-PON Encapsulation Mode) PORT (port), when connecing subscriber equipment or residence network equipment, generally Ethernet (Ethernet) interface (ETH PORT, Ethernet Port) by ONU inserts.User's up-downgoing flow: from GEM PORT to ETH PORT is downlink traffic, is uplink traffic from ETH PORT to GEM PORT, and when data flow was passed through ONU equipment, ONU needed to handle from the next data of different ports.GEM PORT is a kind of virtual stream on the GEM layer, identifies differentiation by GEM PORTID.Each GEM PORT is used for being every kind of Ethernet service stream, or the transmission service of one group of identical Business Stream, and the GEM layer is distinguished different service traffics by GEM PORT.GEMPORT ID belongs to the part of GEM head, is used for identifying GEM PORT.GEM is encapsulated as the encapsulation mode of data in the GPON system, by will being encapsulated in the frame format of GEM after the packing of Ethernet bag.In system, a T-CONT can carry a plurality of GEM PORT, and T-CONT is the distribution that is used for controlling upstream bandwidth in the GPON system, and the service traffics of all ONU all are mapped directly into T-CONT.
Several different methods is arranged at present, as deep-packet detection (DPI), ethernet type, VLAN (VLAN) ID, IP TOS (type of service), IP address, transport layer port number etc. on traffic differentiation.These modes all are the professional sorting techniques that possible adopt, but in for similar GPON or the main like this access style network that inserts as the user of DSLAM (Digital Subscriber Line Access Multiplexer), complicated service identification and differentiating method are owing to may can't realize on some equipment that (reason that can't realize is that chip itself is not supported, if adopt high-grade chip may increase equipment cost again in addition), thereby cause practicality to reduce greatly, brought the pressure on the cost also for simultaneously these equipment.
Summary of the invention
The invention provides the method for mapping business in a kind of Gigabit Passive Optical Network system, to solve in the GPON system problem that complicated service identification and differentiating method cause the equipment practicality to reduce greatly.
In order to solve the problems of the technologies described above, the invention provides the method for mapping business in a kind of Gigabit Passive Optical Network system, comprise the steps:
(1) class of business of user port transmitting data stream is set, and described class of business is provided with User Priority respectively, the mapping relations between described User Priority and the Gigabit Passive Optical Network port are set then;
(2) when described user port has the data flow input, optical network unit ONU or Optical Network Terminal ONT are according to the User Priority of the corresponding class of business of described user port, determine the Gigabit Passive Optical Network port that this User Priority is mapped to, with the data flow transmission of described user port to described Gigabit Passive Optical Network port.
The method of the invention, wherein, described user port is the port that directly inserts subscriber equipment, distinguishes with the port numbers that directly inserts subscriber equipment.
Further, insert the user port of subscriber equipment for ONU indirectly by switch, the user-side port of the switch that inserts with described ONU is the port of the class of business of distinguishes data stream; Directly insert the user port of subscriber equipment for ONT, insert the port of the port of subscriber equipment with described ONT as the class of business of distinguishes data stream.
Further, insert this situation of user port of subscriber equipment indirectly by switch, the class of business of user port transmitting data stream is set on the switch that described ONU inserts, and described class of business is provided with User Priority respectively for described ONU.
Further, insert this situation of user port of subscriber equipment indirectly by switch for described ONU, when described user port has the data flow input, described switch obtains the precedence information of this data flow according to the class of business of transmitting data stream, described precedence information is brought in the data flow that has VLAN ID VLANTAG, sent to described ONU.
Further, when described ONU receive from switch send have the data flow of VLANTAG the time, it is according to the described User Priority that has the data flow of VLANTAG, determine the Gigabit Passive Optical Network port that this User Priority is mapped to, the data flow transmission of described user port is arrived described Gigabit Passive Optical Network port, and send on the optical line terminal OLT equipment by Optical Distribution Network ODN network.
Further, when described ONU receives the data flow of sending by the ODN network from OLT, described ONU will according to the data flow that has VLANTAG with the information of User Priority among the VLANTAG, and with mapping relations information between the Gigabit Passive Optical Network port data flow is sent on the corresponding downlink port according to this priority.
The method of the invention, wherein, described Gigabit Passive Optical Network port is Gigabit Passive Optical Network encapsulation mode port GEM PORT, distinguishes with Gigabit Passive Optical Network encapsulation mode port-mark GEM PORT ID.
The method of the invention, wherein, the mapping relations between described User Priority and the Gigabit Passive Optical Network port adopt mapping one to one.
The method of the invention, wherein, directly insert the user port of subscriber equipment for ONT, the User Priority of class of business He this class of business of transmitting data stream is set on described ONT, described ONT directly obtains to want the user priority information of transmitting data stream, and transmits according to map information.
The present invention utilizes existing networking model and functional requirement; by a kind of simple traffic identification and differentiating method; satisfy the requirement of system for the business classification; simultaneously owing to need not do too much requirement to the hardware condition of existing device; can utilize the equipment of existing network to do professional function of classifying; thereby protected user's investment, improved practicality.
Description of drawings
Fig. 1 is a GPON system configuration schematic diagram;
Fig. 2 is the ONU of a GPON system structural representation;
Fig. 3 is an embodiment of the invention method for mapping business flow chart;
Fig. 4 is an application example method for mapping business schematic diagram of the present invention.
Embodiment
Mapping function between user port and GPON port described in the invention is exactly in order to satisfy the differentiation work of professional classification.In order simple and effectively to realize professional classification and identification, what this paper mainly adopted is the mode that class of business is provided with User Priority.
Below in conjunction with the drawings and specific embodiments technical scheme of the present invention is described in detail.
As shown in Figure 3, embodiment of the invention method for mapping business flow process comprises the steps:
The class of business of user port transmitting data stream is set, and described user port is the port that directly inserts subscriber equipment, distinguishes with the port numbers that directly inserts subscriber equipment.The user-side port of the switch S that inserts as ONU in above-mentioned Fig. 1 is the port of the class of business of distinguishes data stream, on ONT, inserts the port of the port of subscriber equipment as the class of business of distinguishes data stream with ONT.
Above-mentioned class of business is provided with User Priority respectively.With the 802.1D User Priority is example, defines different types of service respectively according to the value of User Priority, as shown in table 1 below.User Priority is 7 expression TDM (time division multiplexing) types of service, User Priority is 5 expression VOIP (transporting speech on the IP network) types of service, User Priority is 4 expression video traffic types, as IPTV (Web TV), VOD (video request program) etc., User Priority is 0 the common business of networking type of expression.
| UserPriority | Type of service | Remarks |
| 7 | Network?Control | Comprise TDM |
| 6 | Internetwork?Control | Keep |
| 5 | Voice(<10ms?latency?andjitter) | VoIP |
| 4 | Video(<100mslatencyand?jitter) | IPTV, video |
| 3 | Critical?Applications | Keep |
| 2 | Excellent?Effort | Keep |
| 1 | Background | Keep |
| 0 | Best?Effort | Common business of networking |
The type of service definition list that table 1 is different
Insert this situation of user port of subscriber equipment for ONU indirectly by switch S, the class of business of user port transmitting data stream is set on the switch that described ONU inserts, and described class of business is provided with User Priority respectively.Directly insert this situation of user port of subscriber equipment for ONT, the setting of step 301 is all finished on ONT.
Then in the mapping relations that are provided with on ONU or the ONT between above-mentioned User Priority and the GPON port.Mapping relations between user priority information and the GEM PORT ID adopt method one to one, and promptly a class business is mapped on the GEM PORT.
On up direction, be the mapping relations between the many-one, from a plurality of ports, the service traffics that a plurality of VLAN circuit or a plurality of user come are integrated into same GEM PORT.And on down direction, be the mapping relations of one-to-many, the corresponding a plurality of user ports of a kind of type of service possibility, VLAN circuit or a plurality of user.
Insert this situation of user port of subscriber equipment indirectly by switch S for ONU, when described user port has the data flow input, described switch obtains the precedence information of this data flow according to the class of business of transmitting data stream, described precedence information is brought in the data flow that has VLAN ID VLANTAG, sent to described ONU.When described ONU receive from switch send have the data flow of VLANTAG the time, it is according to the described User Priority that has the data flow of VLANTAG, determine the Gigabit Passive Optical Network port that this User Priority is mapped to, the data flow transmission of described user port is arrived described Gigabit Passive Optical Network port, and send on the OLT equipment by the ODN network.Directly insert this situation of user port of subscriber equipment for ONT, ONT can directly obtain to want the user priority information of transmitting data stream, and transmits according to map information.
As shown in Figure 4, in the application example method for mapping business schematic diagram of the present invention, be connected to switch S under the ONU equipment, switch S inserts user's computer, phone, set-top box or television equipment respectively by different ports.These three kinds of equipment can think to represent respectively three kinds of different types of service.Computer has been represented common business of networking, and phone has been represented the VOIP business, and set-top box or TV have been represented IPTV and VOD business.
In order to realize professional mapping, idiographic flow is described below:
Step 401 is provided with the class of business of the transmitting data stream of switch S upper port correspondence.Rule is common business of networking for the port traffic type that connects computer, and the port traffic type of answering the call is the VOIP business, and the port traffic type of meet sb. at the airport top box or TV is a video traffic;
Step 402 is provided with User Priority respectively to the class of business on the switch S.The User Priority of the common business of networking of computer representative is 0, and the User Priority of the speech business of phone representative is 5, and the User Priority of the video traffic of set-top box or TV representative is 4; Use the VLAN circuit to be connected between switch S and the ONU, promptly the data flow between ONU and the S must have VLANTAG (VLAN ID);
Step 403 is provided with the mapping relations between last User Priority of ONU and the GEM PORT.The User Priority classification of the last use of ONU is consistent with the definition on the S.Mapping relations adopt mapping one to one, promptly User Priority be 0 business to be mapped to GEM PORT be 10 port, User Priority be 5 business to be mapped to GEM PORT be 15 port, User Priority is that to be mapped to GEMPORT be 14 port for 4 business;
Step 404, when data flow transmission, realize mapping: switch S is at first to wanting data flow transmitted differentiated service kind, obtain wanting the precedence information of data flow transmitted then according to this class of business, and send to ONU (VLANTAG on data flow band when the VLAN circuit transmission) by the VLAN circuit, when ONU receive from switch S send have the data flow of VLANTAG the time, it will according to the information of User Priority among the VLANTAG realize with GEM PORT ID between the mapping processing, and data flow be encapsulated in the GEM frame send on the OLT equipment by the ODN network; When ONU receives the data flow of sending by the ODN network from OLT, ONU will according to the data flow that has VLANTAG with the information of User Priority among the VLANTAG, and according to the mapping relations information between this priority and the GEM PORT ID data flow is sent on the corresponding downlink port (usually under pattern one to one, only can corresponding downlink port; For the one-to-many pattern, when a plurality of downlink port is arranged, will all duplicate a data flow) to these ports.
Above-mentioned application example is the port of the class of business of distinguishes data stream with the user-side port of the switch S that ONU inserts.And on ONT, insert the port of the port of subscriber equipment as the class of business of distinguishes data stream with ONT, method is similar, difference is that the class of business of transmitting data stream and the User Priority of this class of business are provided with on ONT, so ONT can directly obtain to want the user priority information of transmitting data stream, and transmit according to map information.
By realized the function of professional mapping in the GPON system with upper type.By utilizing prior art and device characteristics, the mode of use port and User Priority is implemented in the business mapping between the access device, and the mapping relations between GPON system business type and the port, thereby for system inserts different user, distinguish different business a kind of advantages of simplicity and high efficiency implementation method is provided, simplified the identifying of type of service, reduced the functional performance requirement of type of service identification, improved the practicality and the adaptability of traffic differentiation and mapping function greatly equipment.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, the method for mapping business in a kind of Gigabit Passive Optical Network system is characterized in that, comprises the steps:
(1) class of business of user port transmitting data stream is set, and described class of business is provided with User Priority respectively, the mapping relations between described User Priority and the Gigabit Passive Optical Network port are set then;
(2) when described user port has the data flow input, optical network unit ONU or Optical Network Terminal ONT are according to the User Priority of the corresponding class of business of described user port, determine the Gigabit Passive Optical Network port that this User Priority is mapped to, with the data flow transmission of described user port to described Gigabit Passive Optical Network port.
2, method according to claim 1 is characterized in that, described user port is the port that directly inserts subscriber equipment, distinguishes with the port numbers that directly inserts subscriber equipment.
3, as method as described in the claim 2, it is characterized in that, insert the user port of subscriber equipment for ONU indirectly by switch, the user-side port of the switch that inserts with described ONU is the port of the class of business of distinguishes data stream; Directly insert the user port of subscriber equipment for ONT, insert the port of the port of subscriber equipment with described ONT as the class of business of distinguishes data stream.
4, as method as described in the claim 3, it is characterized in that, insert this situation of user port of subscriber equipment indirectly by switch for described ONU, the class of business of user port transmitting data stream is set on the switch that described ONU inserts, and described class of business is provided with User Priority respectively.
5, as method as described in the claim 4, it is characterized in that, insert this situation of user port of subscriber equipment indirectly by switch for described ONU, when described user port has the data flow input, described switch obtains the precedence information of this data flow according to the class of business of transmitting data stream, described precedence information is brought in the data flow that has VLAN ID VLANTAG, sent to described ONU.
6, as method as described in the claim 5, it is characterized in that, when described ONU receive from switch send have the data flow of VLANTAG the time, it is according to the described User Priority that has the data flow of VLANTAG, determine the Gigabit Passive Optical Network port that this User Priority is mapped to, the data flow transmission of described user port is arrived described Gigabit Passive Optical Network port, and send on the optical line terminal OLT equipment by Optical Distribution Network ODN network.
7, as method as described in the claim 6, it is characterized in that, when described ONU receives the data flow of sending by the ODN network from OLT, described ONU will according to the data flow that has VLANTAG with the information of User Priority among the VLANTAG, and with mapping relations information between the Gigabit Passive Optical Network port data flow is sent on the corresponding downlink port according to this priority.
8, method according to claim 1 is characterized in that described Gigabit Passive Optical Network port is Gigabit Passive Optical Network encapsulation mode port GEM PORT, distinguishes with Gigabit Passive Optical Network encapsulation mode port-mark GEM PORT ID.
9, method according to claim 1 is characterized in that, the mapping relations between described User Priority and the Gigabit Passive Optical Network port adopt mapping one to one.
10, as method as described in the claim 3, it is characterized in that, directly insert the user port of subscriber equipment for ONT, the User Priority of class of business He this class of business of transmitting data stream is set on described ONT, described ONT directly obtains to want the user priority information of transmitting data stream, and transmits according to map information.
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| CNA2007101631843A CN101414941A (en) | 2007-10-16 | 2007-10-16 | Method for mapping business of G-bit passive optical network system |
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| CNA2007101631843A CN101414941A (en) | 2007-10-16 | 2007-10-16 | Method for mapping business of G-bit passive optical network system |
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| WO2010145598A1 (en) * | 2009-11-03 | 2010-12-23 | 中兴通讯股份有限公司 | Configuration method, scheduling method for downlink priority scheduling and equipment thereof |
| CN102075437A (en) * | 2011-02-12 | 2011-05-25 | 成都市华为赛门铁克科技有限公司 | Communication method, gateway and network |
| CN101719793B (en) * | 2009-12-07 | 2012-12-12 | 浙江工业大学 | System for access control of unidirectional light bus network based on priority level dynamic regulation |
| CN103634228A (en) * | 2013-11-25 | 2014-03-12 | 华为技术有限公司 | Network message transmission method and equipment |
| CN104486195A (en) * | 2014-12-22 | 2015-04-01 | 上海市共进通信技术有限公司 | Method for realizing business model control management in GPON terminal equipment |
| CN105207956A (en) * | 2015-10-08 | 2015-12-30 | 国网天津市电力公司 | Multi-service isolation real-time communication system and method for power terminal communication access network |
| CN109743646A (en) * | 2019-03-12 | 2019-05-10 | 深圳市瑞吉联通信科技有限公司 | A kind of delivery method and device of broadband connection data flow |
| WO2022100593A1 (en) * | 2020-11-11 | 2022-05-19 | 中兴通讯股份有限公司 | Configuration method, data transmission method, controller, optical line terminal, and medium |
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- 2007-10-16 CN CNA2007101631843A patent/CN101414941A/en active Pending
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| CN102055643A (en) * | 2009-11-03 | 2011-05-11 | 中兴通讯股份有限公司 | Allocation method for downlink priority scheduling, and downlink priority scheduling method and device |
| WO2010145598A1 (en) * | 2009-11-03 | 2010-12-23 | 中兴通讯股份有限公司 | Configuration method, scheduling method for downlink priority scheduling and equipment thereof |
| CN102055643B (en) * | 2009-11-03 | 2015-05-20 | 中兴通讯股份有限公司 | Allocation method for downlink priority scheduling, and downlink priority scheduling method and device |
| CN101719793B (en) * | 2009-12-07 | 2012-12-12 | 浙江工业大学 | System for access control of unidirectional light bus network based on priority level dynamic regulation |
| CN102075437A (en) * | 2011-02-12 | 2011-05-25 | 成都市华为赛门铁克科技有限公司 | Communication method, gateway and network |
| CN102075437B (en) * | 2011-02-12 | 2013-04-24 | 华为数字技术（成都）有限公司 | Communication method, gateway and network |
| US10057175B2 (en) | 2013-11-25 | 2018-08-21 | Huawei Technologies Co., Ltd. | Method and device for transmitting network packet |
| CN103634228A (en) * | 2013-11-25 | 2014-03-12 | 华为技术有限公司 | Network message transmission method and equipment |
| CN104486195A (en) * | 2014-12-22 | 2015-04-01 | 上海市共进通信技术有限公司 | Method for realizing business model control management in GPON terminal equipment |
| CN104486195B (en) * | 2014-12-22 | 2018-12-07 | 上海市共进通信技术有限公司 | The method of business model control management is realized in GPON terminal device |
| CN105207956B (en) * | 2015-10-08 | 2018-01-05 | 国网天津市电力公司 | The multi-service isolation real-time communication system and method for electric power terminal communication access net |
| CN105207956A (en) * | 2015-10-08 | 2015-12-30 | 国网天津市电力公司 | Multi-service isolation real-time communication system and method for power terminal communication access network |
| CN109743646A (en) * | 2019-03-12 | 2019-05-10 | 深圳市瑞吉联通信科技有限公司 | A kind of delivery method and device of broadband connection data flow |
| WO2022100593A1 (en) * | 2020-11-11 | 2022-05-19 | 中兴通讯股份有限公司 | Configuration method, data transmission method, controller, optical line terminal, and medium |
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