CN103546834A - System and method for achieving coexistence between XG-PONs and GPONs in ODNs - Google Patents
System and method for achieving coexistence between XG-PONs and GPONs in ODNs Download PDFInfo
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- CN103546834A CN103546834A CN201310528346.4A CN201310528346A CN103546834A CN 103546834 A CN103546834 A CN 103546834A CN 201310528346 A CN201310528346 A CN 201310528346A CN 103546834 A CN103546834 A CN 103546834A
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Abstract
The invention discloses a system and method for achieving coexistence between XG-PONs and GPONs in ODNs, and relates to the field of optical fiber communication. The system for achieving the coexistence between the XG-PONs and the GPONs in the ODNs comprises N GPON OLTs, an XG-PON OLT, a splitter with the shunt ratio of 1:M and N WDM devices, wherein M>=N>=1, the M and the N are both positive integers, the N GPON OLTs are connected with the N WDM devices respectively, the XG-PON OLTs are connected with the N WDM devices through the splitter with the shunt ratio of 1:M, optical signals of one single XG-PON system are shunted to the ODNs of N GPON systems, a plurality of XG-PON ONUs of one XG-PON system are distributed to the ODNs of the GPON systems in a dispersed-configuration mode, and mixed networking can be carried out on the XG-PON systems and the GPON systems according to the ratio of 1:N. According to the system and method for achieving the coexistence between the XG-PONs and the GPONs in the ODNs, the input cost of equipment can be reduced, and use efficiency of the system can be improved.
Description
Technical field
The present invention relates to fiber optic communication field, particularly relate to a kind of XG-PON and GPON and in ODN, realize the system and method coexisting.
Background technology
GPON(Gigabit Passive Optical Network, gigabit passive optical network) technology is based on ITU-T series standard G.984, that a kind of speed is up to the comprehensive access technology of broadband passive optical network of 2.48832Gbps, its local side OLT (Optical Line Termination, optical line terminal) with one or more far-end ONU(Optical Network Unit, optical network unit) between, adopt single fiber bi-directional mode with tree-like ODN(Optical Distribution Network, fiber distribution network) network configuration is connected, there is high bandwidth, high efficiency, the many merits such as large coverage and user interface are abundant, by most of operators, be considered as realizing Access Network business broadband, the desirable technique of synthesization transformation, on existing network, widely apply at present.
The basic group-network construction of system based on GPON technology as shown in Figure 1, it mainly by the OLT of local side, the ONT/ONU of user side and the ODN that connects these two kinds of equipment form, wherein ODN comprises circuit optical fiber and passive optical splitter (Splitter).GPON system is single fiber bi-directional system, and uplink and downlink should be used respectively different wavelength, and the centre wavelength of down going channel is 1490nm, and wave-length coverage is 1480nm～1500nm; The centre wavelength of data feedback channel is 1310nm, and wave-length coverage is 1290～1330nm, its single GPON system maximum can access light that 128 GPON ONU equipment provide maximum 1:128 along separate routes than.
XG-PON(10-Gigabit-capable Passive Optical Networks, 10G bit passive optical network) technology is the speed upgrade technology of GPON system, its downstream rate is up to 9.95328Gbps, meet G.987 series standard of ITU-T, its system structure composed and network construction form and GPON are in full accord, ，Shi shown in Figure 1 telecom operators are from now on for the desirable technique of GPON technology upgrading transformation.XG-PON system is also single fiber bi-directional system, and its uplink and downlink are used respectively different wavelength, and the centre wavelength of down going channel is 1577nm, and wave-length coverage is 1575nm～1580nm; The centre wavelength of data feedback channel is 1270nm, and wave-length coverage is 1260～1280nm, its single XG-PON system maximum can access light that 256 XG-PONONU equipment provide maximum 1:256 along separate routes than.
When needs allow GPON and XG-PON system (comprising OLT and ONU) realize and coexisting in same ODN, when sharing existing ODN resource, for example, while needing newly-increased XG-PON user in the ODN that opens GPON user, just need between OLT side OLT optical interface and ODN, increase a WDM(Wavelength Division Multiplexing, wavelength division multiplexing) device, shown in Figure 2, this WDM device is in down direction (OLT to ONU direction), by the 1480nm～1500nm downlink optical signal from GPON system with close ripple from 1575nm～1580nm downlink optical signal of XG-PON system and enter simple optical fiber, be sent to ODN, trunk optical fiber in ODN, after optical branching device and branch optical fiber, arrive ONU equipment separately, on up direction (ONU to OLT direction), 1260nm～1280nm uplink optical signal that 1290nm～1330nm light signal that each GPON ONU sends and each XG-PONONU send is after each branch optical fiber is crossed optical branching device and trunk optical fiber, at WDM device, place carries out partial wave, isolated 2 road light signals are sent to respectively the receiver module of GPON and XG-PON system, have so just realized XG-PON and GPON and have coexisted in same ODN.
Although GPON and XG-PON can realize the ONU that can access GPON in same ODN in the i.e. ODN of coexisting by WDM device, also can access the ONU of XG-PON, just there will be following 2 problems in actual applications:
First, the cost of XG-PON system is the several times of GPON system, if simply a set of XG-PON system and a set of GPON system are integrated into the equipment investment cost that networking in same ODN will increase considerably operator by WDM device;
In addition, XG-PON can provide higher bandwidth to user, but price is higher, what can enjoy is main mainly with high-end customer, the number of users that is to say XG-PON will be less than the number of users of GPON, if still adopt the 1:1 proportioning mode networking of a set of GPON system of a set of XG-PON system matches will cause the waste of device resource.
Summary of the invention
The object of the invention is in order to overcome the deficiency of above-mentioned background technology, provide a kind of XG-PON and GPON in ODN, to realize the system and method coexisting, can reduce the input cost of equipment, the service efficiency of increase system.
The invention provides a kind of XG-PON and GPON and in ODN, realize the system coexisting, comprise N GPON OLT, 1 XG-PON OLT and N WDM device, also comprise that 1 along separate routes than being the optical branching device of 1:M, M >=N >=1, M, N is positive integer, N GPON OLT is connected with N WDM device respectively, XG-PON OLT is compared and is connected with N WDM device respectively for the optical branching device of 1:M by shunt, the light signal of single XG-PON system is shunted to by an optical branching device in each ODN of N GPON system and go, each WDM device again by optical branching device respectively with each ODN in G-PON ONU, XG-PON ONU is connected, by a plurality of XG-PON ONU decentralized configuration in an XG-PON system in each ODN of N GPON system, making XG-PON system and GPON system is that 1:N carries out mixed networking according to configuration quantitative proportion.
The present invention also provides a kind of XG-PON and GPON in ODN, to realize the method coexisting, and comprises the following steps:
1～N cover GPON OLT is the GPONONU equipment separately of the ODN network insertion by separately respectively, while needing to access XG-PON ONU equipment in each ODN, only increase and join a set of XG-PON OLT, only increase an XG-PON OLT local side optical interface, under this XG-PON optical interface, connect one along separate routes than be 1:M optical branching device, M >=N >=1, M, N is positive integer, this optical branching device is separated into M optical channel by the light signal of XG-PON, adopt again WDM device that the light signal of the XG-PON light signal of this M road optical channel and 1～N cover GPON system is closed to ripple and partial wave, the GPON on final this 1～N road and XG-PON He road light signal enter ODN network through the WDM device in path separately, and be sent to ONU end, GPON ONU and GPON OLT communicate, XG-PONONU communicates by letter with XG-PON OLT, finally realize the shared ODN of a set of XG-PON system and a plurality of GPON system and carry out networking.
Compared with prior art, advantage of the present invention is as follows:
The present invention increases an optical branching device in XG-PON system, the light signal of single XG-PON system is gone than shunting to for the optical branching device of 1:M in each ODN of N GPON system along separate routes by one, M >=N >=1, M, N are positive integer, soon a plurality of XG-PON ONU decentralized configuration in an XG-PON system are in each ODN of N GPON system, and making XG-PON system and GPON system is that 1:N carries out mixed networking according to configuration quantitative proportion.In the XG-PON of practical application and GPON coexist the system of ODN, the present invention can reduce equipment input cost, increase the service efficiency of system.
Accompanying drawing explanation
Fig. 1 is the Organization Chart of GPON, the basic networking of XG-PON.
Fig. 2 is that GPON, XG-PON close the theory diagram of ripple and the shared ODN of partial wave by WDM.
Fig. 3 is that in the embodiment of the present invention, XG-PON and GPON realize the structured flowchart of the system coexisting in ODN.
Embodiment
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
Shown in Figure 3, the embodiment of the present invention provides a kind of XG-PON and GPON in ODN, to realize the system coexisting, comprise N GPON OLT, 1 XG-PON OLT, 1 along separate routes than the optical branching device and N the WDM device that are 1:M, M >=N >=1, M, N is positive integer, N GPON OLT is connected with N WDM device respectively, XG-PON OLT is compared and is connected with N WDM device respectively for the optical branching device of 1:M by shunt, the light signal of single XG-PON system is shunted to by an optical branching device in each ODN of N GPON system and go, each WDM device again by optical branching device respectively with each ODN in G-PON ONU, XG-PON ONU is connected, soon a plurality of XG-PON ONU decentralized configuration in an XG-PON system are in each ODN of N GPON system, making XG-PON system and GPON system is that 1:N carries out mixed networking according to configuration quantitative proportion.
Shown in Figure 3, the embodiment of the present invention also provides a kind of XG-PON and GPON in ODN, to realize the method coexisting, and comprises the following steps:
1～N cover GPON OLT is the GPONONU equipment separately of the ODN network insertion by separately respectively, while needing to access XG-PON ONU equipment in each ODN, only increase and join a set of XG-PON OLT, only increase an XG-PON OLT local side optical interface, under this XG-PON optical interface, connect one along separate routes than be 1:M optical branching device, M >=N >=1, M, N is positive integer, this optical branching device is separated into M optical channel by the light signal of XG-PON, adopt again WDM device that the light signal of the XG-PON light signal of this M road optical channel and 1～N cover GPON system is closed to ripple and partial wave, the GPON on final this 1～N road and XG-PON He road light signal enter ODN network through the WDM device in path separately, and be sent to ONU end, so GPON ONU and GPON OLT communicate, XG-PONONU communicates by letter with XG-PON OLT, finally realize a set of XG-PON system and can carry out networking with the shared ODN of a plurality of GPON systems.
The present invention's application of having succeeded in the system of XG-PON system and a plurality of GPON system mixed networking, after checking, proof the method is simple after tested, input cost is low, can significantly improve the service efficiency of system.
Those skilled in the art can carry out various modifications and variations to the embodiment of the present invention, if these revise and modification within the scope of the claims in the present invention and equivalent technologies thereof, these modifications and modification are also within protection scope of the present invention.
The prior art that the content of not describing in detail in specification is known to the skilled person.
Claims (2)
1. an XG-PON and GPON realize the system coexisting in ODN, comprise N GPON OLT, 1 XG-PON OLT and N WDM device, it is characterized in that: also comprise that 1 along separate routes than being the optical branching device of 1:M, M >=N >=1, M, N is positive integer, N GPON OLT is connected with N WDM device respectively, XG-PON OLT is compared and is connected with N WDM device respectively for the optical branching device of 1:M by shunt, the light signal of single XG-PON system is shunted to by an optical branching device in each ODN of N GPON system and go, each WDM device again by optical branching device respectively with each ODN in G-PON ONU, XG-PON ONU is connected, by a plurality of XG-PON ONU decentralized configuration in an XG-PON system in each ODN of N GPON system, making XG-PON system and GPON system is that 1:N carries out mixed networking according to configuration quantitative proportion.
2. XG-PON and GPON realize the method coexisting in ODN, it is characterized in that, comprise the following steps:
1～N cover GPON OLT is the GPON ONU equipment separately of the ODN network insertion by separately respectively, while needing to access XG-PON ONU equipment in each ODN, only increase and join a set of XG-PON OLT, only increase an XG-PON OLT local side optical interface, under this XG-PON optical interface, connect one along separate routes than be 1:M optical branching device, M >=N >=1, M, N is positive integer, this optical branching device is separated into M optical channel by the light signal of XG-PON, adopt again WDM device that the light signal of the XG-PON light signal of this M road optical channel and 1～N cover GPON system is closed to ripple and partial wave, the GPON on final this 1～N road and XG-PON He road light signal enter ODN network through the WDM device in path separately, and be sent to ONU end, GPON ONU and GPON OLT communicate, XG-PON ONU communicates by letter with XG-PON OLT, finally realize the shared ODN of a set of XG-PON system and a plurality of GPON system and carry out networking.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103957475A (en) * | 2014-04-11 | 2014-07-30 | 烽火通信科技股份有限公司 | Networking system allowing GPON and XG-PON to be concomitant and application |
| CN115460486A (en) * | 2022-09-02 | 2022-12-09 | 烽火通信科技股份有限公司 | MPM dual-mode service implementation method and device of 50G PON system |
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| CN101877798A (en) * | 2009-04-30 | 2010-11-03 | 中兴通讯股份有限公司 | Coexistence system of existing passive optical network and next generation passive optical network and updating method |
| WO2012062119A1 (en) * | 2010-11-12 | 2012-05-18 | 中兴通讯股份有限公司 | Passive optical network and signal transmission method of passive optical network |
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| CN101568046A (en) * | 2009-06-09 | 2009-10-28 | 成都优博创技术有限公司 | Method for realizing coexistence of unsymmetrical 10GEPON and GEPON optical network terminals and system thereof |
| WO2012062119A1 (en) * | 2010-11-12 | 2012-05-18 | 中兴通讯股份有限公司 | Passive optical network and signal transmission method of passive optical network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957475A (en) * | 2014-04-11 | 2014-07-30 | 烽火通信科技股份有限公司 | Networking system allowing GPON and XG-PON to be concomitant and application |
| CN115460486A (en) * | 2022-09-02 | 2022-12-09 | 烽火通信科技股份有限公司 | MPM dual-mode service implementation method and device of 50G PON system |
| CN115460486B (en) * | 2022-09-02 | 2024-05-24 | 烽火通信科技股份有限公司 | MPM dual-mode service implementation method and device of 50G PON system |
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