CN102480651A - Multi-rate optical signal transmission method, multi-rate optical signal transmission system and optical network unit - Google Patents
Multi-rate optical signal transmission method, multi-rate optical signal transmission system and optical network unit Download PDFInfo
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- CN102480651A CN102480651A CN2010105573938A CN201010557393A CN102480651A CN 102480651 A CN102480651 A CN 102480651A CN 2010105573938 A CN2010105573938 A CN 2010105573938A CN 201010557393 A CN201010557393 A CN 201010557393A CN 102480651 A CN102480651 A CN 102480651A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0064—Arbitration, scheduling or medium access control aspects
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Abstract
The invention provides a multi-rate optical signal transmission method, a multi-rate optical signal transmission system and an optical network unit. The method includes the steps that the ONU (optical network unit) receives an optical signal rate selective command sent by an OLT (optical line terminal), and then selects optical devices including optical signal rates in the optical signal rate selective command for optical signal transmission. The ONU comprises at least two optical devices, and each optical device transmits optical signals of different rates. By the aid of the method, when the rates of users using the ONU need to be upgraded or the high-rate ONU supports low-rate users, the ONU can be updated without interrupting user service, so that cost is reduced.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of many speed optical signal transmission method, system and optical network unit.
Background technology
Gigabit passive optical network (GPON; Gigabit-Capable Passive Optical Network) technology and Ethernet passive optical network (EPON; Ethernet Passive Optical Network) is two important techniques branches in the PON family; With other PON technology type seemingly, GPON and EPON adopt the passive light access technology of point to the multidrop topology structure.
Usually; The topological structure of PON system is as shown in Figure 1; PON is by the optical line terminal (OLT, Optical Line Terminal) of office's side, the optical network unit (ONU, Optical Network Unit) and the Optical Distribution Network (ODN of user side; Optical Distribution Network) forms, adopt the network configuration of point usually to multiple spot.ODN is made up of Passive Optical Components such as monomode fiber, optical branching device, optical connectors, and ODN is that the physical connection between OLT and the ONU provides light-transmitting medium.
Downstream rate and the upstream rate of the EPON of extensive use at present are 1.25Gbit/s, and the downstream rate of GPON is 2.5Gbit/s, and upstream rate is 1.25Gbit/s.Along with development of Communication Technique such as the Internets; Increasing gradually of the number of users of access PON system; And the user increases the increasing demand of bandwidth; The PON technology of future generation that is the basis with EPON and GPON technology develops rapidly; PON technology of future generation based on the EPON technology is the 10G EPON technology that downstream rate and upstream rate are 10Gbit/s, and the of future generation PON technology technological based on GPON is that 10Gbit/s, upstream rate are the XGPON technology of 2.5Gbit/s (perhaps 10Gbit/s) for downstream rate.For making full use of existing ODN network; The ODN network of the shared existing EPON of operator planning EPON and 10G EPON network system; The ODN network of the shared existing GPON of GPON and 10G GPON network system; When the user's of the ONU of existing EPON (perhaps GPON) system speed need be upgraded; Operator need send the technical staff ONU of EPON (perhaps GPON) to be replaced by the ONU of 10G EPON (perhaps XG PON) to the scene of depositing ONU, causes operating cost of operator to increase, and the ONU that changes existing EPON (perhaps GPON) can cause the temporary interruption of the customer service under the ONU.
To in the correlation technique when the user's of the ONU of existing EPON (perhaps GPON) system speed need be upgraded; Need the ONU of EPON (perhaps GPON) be replaced by the ONU of 10G EPON (perhaps XG PON); The problem that causes the temporary interruption of the customer service under the ONU does not propose effective solution at present as yet.
Summary of the invention
The present invention aims to provide a kind of many speed optical signal transmission method, system and optical network unit ONU; To solve in the correlation technique when the user's of the ONU of existing EPON (perhaps GPON) system speed need be upgraded; Need the ONU of EPON (perhaps GPON) be replaced by the ONU of 10G EPON (perhaps XG PON), cause the problem of the temporary interruption of the customer service under the ONU.
According to an aspect of the present invention, a kind of many speed optical signal transmission method is provided, has been applied to comprise in the passive optical network PON: optical network unit ONU receives the light signal rate selection order that optical line terminal OLT is sent; And the optical device of the light signal speed that comprises in said ONU selection and the order of said light signal rate selection carries out optical signal transmission; Wherein, comprise at least two optical devices among the said ONU, the light signal of each optical device transmission different rates.
More excellent; The optical device of the light signal speed that said ONU selection comprises in ordering with said light signal rate selection carries out optical signal transmission; Comprise following one of arbitrarily: said ONU selects to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed; Said ONU switches to the optical signal transmission that second optical device of supporting said second speed carries out second speed, and wherein, said first rate is different with said second speed; Said ONU selects to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order was second speed, said ONU opened the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously; Said ONU selects its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
More excellent, the operation wavelength of said at least two optical devices is different.
More excellent, the operation wavelength of said at least two optical devices is different, comprising: the upward signal of each optical device output realizes closing ripple output through a wavelength division multiplex device WDM1r; And the downstream signal of different operating wavelength arrives different optical devices through said WDM1r partial wave.
According to a further aspect in the invention, a kind of optical network unit ONU is provided, has comprised: at least two optical devices, wherein, each optical device is used to transmit the light signal of different rates.
More excellent; Comprise: handover module; Be used for selecting to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate, when the corresponding light signal speed of said light signal rate selection order is second speed, switch to the optical signal transmission that second optical device of supporting said second speed carries out second speed; Wherein, said first rate is different with said second speed; Opening module; Be used for selecting to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed, open the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously; Select module, be used for selecting its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
More excellent; Said ONU also comprises wavelength division multiplex device WDM1r; Be used for not simultaneously, the upward signal of each optical device output realized closing ripple output in the operation wavelength of said at least two optical devices, with the downstream signal partial wave of different operating wavelength to different optical devices.
According to a further aspect in the invention, a kind of many speed light signal transmission device is provided, has been applied to comprise in the passive optical network PON: optical line terminal OLT is used to send the order of light signal rate selection; Optical network unit ONU is used to receive said light signal rate selection order; The optical device of the light signal speed that selection comprises in ordering with said light signal rate selection carries out optical signal transmission; Wherein, comprise at least two optical devices among the said ONU, the light signal of each optical device transmission different rates.
More excellent; Said ONU is further used for: select to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed; Switch to the optical signal transmission that second optical device of supporting said second speed carries out second speed, wherein, said first rate is different with said second speed; Perhaps; Select to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed, open the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously; Perhaps, select its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
More excellent, said ONU also comprises and closes ripple/wave-dividing device WDM1r, is used in the operation wavelength of said at least two optical devices not simultaneously the upward signal of each optical device output not being realized closing ripple output; The downstream signal partial wave of different operating wavelength is arrived different optical devices.
Adopt the embodiment of the invention, comprise at least two optical devices among the ONU, the light signal of each optical device transmission different rates; ONU receives the light signal rate selection order that optical line terminal OLT is sent; The optical device of the light signal speed that selection comprises in ordering with the light signal rate selection carries out optical signal transmission, and the user's under ONU speed needs upgrading, when perhaps the ONU of two-forty supports low-rate users; Need not interrupt customer service and remove to upgrade ONU, reduce cost.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the topology diagram according to the PON system of correlation technique;
Fig. 2 is the process chart according to many speed optical signal transmission method of the embodiment of the invention;
Fig. 3 is first kind of structural representation according to the ONU of two kinds of speed of support of the embodiment of the invention;
Fig. 4 is the structural representation according to the network of the GPON system of the embodiment of the invention and XGPON coexistence of systems;
Fig. 5 is second kind of structural representation according to the ONU of two kinds of speed of support of the embodiment of the invention;
Fig. 6 is first kind of structural representation according to the optical network unit ONU of the embodiment of the invention;
Fig. 7 is second kind of structural representation according to the optical network unit ONU of the embodiment of the invention;
Fig. 8 is the third structural representation according to the optical network unit ONU of the embodiment of the invention;
Fig. 9 is the structural representation according to many speed light signal transmission system of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Hereinafter will and combine embodiment to specify the present invention with reference to accompanying drawing.Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
Mention in the correlation technique; When the user's of the ONU of existing EPON (perhaps GPON) system speed need be upgraded; Operator need send the technical staff ONU of EPON (perhaps GPON) to be replaced by the ONU of 10G EPON (perhaps XG PON) to the scene of depositing ONU; Cause operating cost of operator to increase, and change the temporary interruption that the ONU that has EPON (perhaps GPON) now can cause the customer service under the ONU.For solving the problems of the technologies described above, the embodiment of the invention provides a kind of many speed optical signal transmission method, is applied in the passive optical network PON, and handling process is as shown in Figure 2, comprising:
The optical device of the light signal speed that step 204, ONU selection comprise in ordering with the light signal rate selection carries out optical signal transmission; Wherein, comprise at least two optical devices among the ONU, the light signal of each optical device transmission different rates.
Adopt the embodiment of the invention, comprise at least two optical devices among the ONU, the light signal of each optical device transmission different rates; ONU receives the light signal rate selection order that optical line terminal OLT is sent; The optical device of the light signal speed that selection comprises in ordering with the light signal rate selection carries out optical signal transmission, and the user's under ONU speed needs upgrading, when perhaps the ONU of two-forty supports low-rate users; Need not interrupt customer service and remove to upgrade ONU, reduce cost.
During enforcement, ONU select with the order of light signal rate selection in the optical device of the light signal speed that comprises carry out optical signal transmission numerous embodiments can be arranged, comprise following one of arbitrarily:
ONU selects to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of light signal rate selection order is second speed; ONU switches to the optical signal transmission that second optical device of supporting second speed carries out second speed; Wherein, first rate is different with second speed;
ONU selects to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of light signal rate selection order was second speed, ONU opened the optical signal transmission that second optical device of supporting second speed carries out second speed simultaneously;
ONU selects its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
During enforcement, first rate is different with second speed, and first rate is second speed greatly, also can be less than second speed.
During enforcement; More excellent; The operation wavelength of at least two optical devices is different, corresponding, can be provided with one and close ripple/wave-dividing device; The upward signal of each optical device output realizes closing ripple output through closing ripple/wave-dividing device, and the downstream signal of different operating wavelength is through closing ripple/wave-dividing device partial wave to different optical devices.
Many speed optical signal transmission method that the embodiment of the invention provides is applicable to many speed of ONU support in the PON system; The speed that has solved the user under the ONU in the existing P ON system needs upgrading, the problem that the temporary transient interruption of the customer service that causes when perhaps the ONU of two-forty supports low-rate users and operator's operation cost increase.
For many speed optical signal transmission method that the embodiment of the invention is provided explaination ground is clearer more detailed, it is described from the another one angle at present:
During enforcement, comprise two kinds of perhaps optical devices of multiple speed among the ONU, ONU takes one of following manner to select the speed of work at least:
Mode one: ONU, is adjusted on the assigned rate under the order (being the light signal rate selection order of preamble) of OLT and works when its speed needs to improve (perhaps reducing) in initial condition certain speed work supporting;
Mode two: ONU when it need support the user of lower (perhaps higher) speed, under the order of OLT, opens the service aisle of the speed of OLT appointment in initial condition certain speed work supporting under the situation of the work that keeps former speed;
Mode three: ONU is in part or all the speed work of initial condition supporting.
Describe with several specific embodiments, specific embodiment is an example with the ONU that supports two kinds of speed all, can also select to support the ONU of two or more speed in the practical application, and the practical implementation flow process is similar with the ONU that supports two kinds of speed at present.
Instance one
The structure of the ONU of two kinds of speed of support is as shown in Figure 3, and ONU comprises two optical devices, and one of them supports that the operating rate of the optical device of XGPON system is to receive the light signal of behavior 10Gbit/s down; The light signal of behavior 2.5Gbit/s in the transmission, the downstream wavelength scope that can receive be 1575nm to 1580nm, the up wavelength of transmission is that 1260nm is to 1280nm; Another optical device of supporting the GPON system is for receiving the light signal of descending 2.5Gbit/s; Receive the light signal of up 1.25Gbit/s, the downstream wavelength scope that can receive be 1480nm to 1500nm, the up wavelength of transmission is that 1290nm is to 1330nm; Certainly; Can also comprise an optical device that is used to receive cable TV (CATV, Cable Television) signal among the ONU, or other optical devices.Receiver wavelength range is that 1550nm is to 1560nm.The downstream signal of the downstream signal of XGPON, the downstream signal of GPON and CATV passes through to arrive optical device, the optical device of supporting the GPON system of supporting the XGPON system and the module that receives the CATV signal respectively behind the wavelength division multiplex device WDM1r partial wave shown in Fig. 3; The upward signal of XGPON and the upward signal of GPON transfer to OLT then through the ODN network that the WDM1r shown in Fig. 3 closes the system that gets into behind the ripple.The optical device of the support XGPON system of ONU is controlled by one group of MAC chip and TM management of software ic with the optical device of supporting the GPON system.ONU can be applied in the network of GPON system shown in Figure 4 and XGPON coexistence of systems, and the structure of the ONU among Fig. 4 is as shown in Figure 3.ONU can select one of following three kinds of modes to carry out work:
Mode one:
The ONU upgrading:
ONU starts the optical device work of supporting GPON system speed when initial condition, this moment, ONU was the ONU that supports the GPON system, and the OLT of GPON system and ONU register according to the mode of GPON system and activate and work.When the whole user's bandwidth that connect under this ONU need be upgraded; ONU need upgrade to the ONU that supports XGPON speed; Then the OLT of GPON system assigns the optical device of closing GPON system speed to ONU; And the order of opening the optical device of XGPON system speed, the ONU of this moment is the ONU that supports the XGPON system, the OLT of XGPON system and ONU register according to the mode of XGPON system and activate and work.ONU accomplishes the work of speed upgrade.
The ONU degradation:
ONU starts the optical device work of supporting XPON system speed when initial condition, this moment, ONU was the ONU that supports the XGPON system, and the OLT of XGPON system and ONU register according to the mode of XGPON system and activate and work.When the whole user's bandwidth that connect under this ONU need be demoted; ONU need be downgraded to the ONU that supports GPON speed; Then the OLT of XGPON system assigns the optical device of closing XGPON system speed to ONU; And open the optical device of GPON system speed, and the ONU of this moment is the ONU that supports the GPON system, the OLT of GPON system and ONU register according to the mode of GPON system and activate and work.ONU accomplishes the work of speed degradation.
Mode two:
ONU starts the optical device work of supporting GPON system speed when initial condition, this moment, ONU was the ONU that supports the GPON system, and the OLT of GPON system and said ONU register according to the mode of GPON system and activate and work.
When the bandwidth of the certain customers that this ONU connects down need be upgraded; ONU is not except for to need the user of bandwidth upgrading to keep the existing operating rate; Need for the customer upgrade that needs bandwidth upgrading the ONU that supports XGPON speed also; Then the OLT of GPON system assigns the optical device that keeps GPON system speed to ONU, and opens the optical device of XGPON system speed, and the ONU of this moment is the ONU that promptly supports the GPON system; Simultaneously also be the ONU that supports the XGPON system, the OLT of XGPON system and ONU register according to the mode of XGPON system and activate and work.
The optical device of the OLT of GPON system and the ONU that satisfies the GPON system and MAC chip and the TM chip of controlling this optical device carry out work according to the mode of GPON system; The optical device of the ONU of GPON system receives only the downstream signal of GPON system; Be the downstream signal of 1480nm to 1500nm; Leach the downstream signal of XGPON system, promptly 1575nm is to the downstream signal of 1580nm; The optical device of the ONU of GPON system only sends the OLT of the upward signal of GPON system to the GPON system; Be the upward signal of 1290nm to 1330nm; The 1290nm of GPON system passes through to get into the optical splitter among Fig. 4 behind the WDM1r at ONU place to the upward signal of 1330nm; Be transferred among Fig. 4 WDM1r then, through arriving the OLT of GPON system behind the partial wave of this WDM1r near OLT.The optical device of the OLT of XGPON system and the ONU that satisfies the XGPON system and MAC chip and the TM chip of controlling this optical device carry out work according to the mode of XGPON system; The optical device of the ONU of XGPON system receives only the downstream signal of XGPON system; Be the downstream signal of 1575nm to 1580nm; Leach the downstream signal of GPON system, promptly 1480nm is to the downstream signal of 1500nm; The optical device of the ONU of XGPON system only sends the OLT of the upward signal of XGPON system to the XGPON system; Be the upward signal of 1260nm to 1280nm; The 1260nm of XGPON system passes through to get into the optical splitter among Fig. 4 behind the WDM1r at ONU place to the upward signal of 1280nm; Be transferred among Fig. 4 WDM1r then, through arriving the OLT of XGPON system behind the partial wave of this WDM1r near OLT.
In addition, the CATV downstream signal arrives ONU after through WDM1r and optical splitter, and the partial wave of the WDM1r through the ONU side arrives the CATV optical device.ONU can also be upgraded to and carry out work on the higher rate outside the work that has kept existing speed, makes ONU can satisfy the user of GPON and two kinds of speed of XGPON simultaneously.Foregoing be the ONU initialization on GPON speed, on the basis that keeps GPON speed, opened the optical device of supporting XGPON speed then; Thereby may be simultaneously operated in the speed of XGPON; In other embodiment, also can adopt the ONU initialization on XGPON speed, on the basis that keeps XGPON speed, open the optical device of supporting GPON speed then; Thereby may be simultaneously operated in the speed of GPON, repeat no more here.
Mode three:
ONU opens the optical device of GPON speed and the optical device of XGPON speed in initial condition, and the ONU of this moment is the ONU that promptly supports the GPON system, also is simultaneously the ONU that supports the XGPON system.The optical device of the OLT of GPON system and the ONU that satisfies the GPON system and MAC chip and the TM chip of controlling this optical device carry out work according to the mode of GPON system; The optical device of the ONU of GPON system receives only the downstream signal of GPON system, and the optical device of the ONU of GPON system only sends the OLT of the upward signal of GPON system to the GPON system.The optical device of the OLT of XGPON system and the ONU that satisfies the XGPON system and MAC chip and the TM chip of controlling this optical device carry out work according to the mode of XGPON system; The optical device of the ONU of XGPON system receives only the downstream signal of XGPON system, and the optical device of the ONU of XGPON system only sends the OLT of the upward signal of XGPON system to the XGPON system.The working method of opening two kinds of optical devices in the working method of OLT and ONU and the mode two simultaneously is identical, repeats no more here.
In embodiments of the present invention, two corresponding medium access control chips of optical device and a traffic management chip also can adopt the corresponding medium access control chip of each optical device and a traffic management chip in other embodiments, and be as shown in Figure 5.
Based on same inventive concept, the embodiment of the invention also provides a kind of optical network unit ONU, and its structure is as shown in Figure 6, comprising: at least two optical devices 601, wherein, each optical device 601 is used to transmit the light signal of different rates.
In one embodiment, as shown in Figure 7, optical network unit ONU can comprise:
In one embodiment, the operation wavelength of at least two optical devices 601 is different.
In one embodiment, as shown in Figure 8, ONU also comprises and closes ripple/wave-dividing device WDM1r 801, is used for the upward signal of each optical device output is realized closing ripple output; The downstream signal partial wave of different operating wavelength is arrived different optical devices.
Based on same inventive concept, the embodiment of the invention also provides a kind of many speed light signal transmission system, is applied in the passive optical network PON, and its structural representation is as shown in Figure 9, comprising:
Optical line terminal OLT 901 is used to send the order of light signal rate selection;
Optical network unit ONU 902 is used for the order of receiving optical signals rate selection; The optical device of the light signal speed that selection comprises in ordering with the light signal rate selection carries out optical signal transmission; Wherein, comprise at least two optical devices among the ONU, the light signal of each optical device transmission different rates.
In one embodiment; ONU can be further used for: select to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of light signal rate selection order is second speed; Switch to the optical signal transmission that second optical device of supporting second speed carries out second speed, wherein, first rate is different with second speed; Perhaps; Select to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of light signal rate selection order is second speed, open the optical signal transmission that second optical device of supporting second speed carries out second speed simultaneously; Perhaps, select its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
In one embodiment, the operation wavelength of at least two optical devices is different.
In one embodiment, also comprise among the ONU and close ripple/wave-dividing device WDM1r, be used for the upward signal of each optical device output is realized closing ripple output; The downstream signal partial wave of different operating wavelength is arrived different optical devices.
From above description, can find out that the present invention has realized following technique effect:
Adopt the embodiment of the invention, comprise at least two optical devices among the ONU, the light signal of each optical device transmission different rates; ONU receives the light signal rate selection order that optical line terminal OLT is sent; The optical device of the light signal speed that selection comprises in ordering with the light signal rate selection carries out optical signal transmission, and the user's under ONU speed needs upgrading, when perhaps the ONU of two-forty supports low-rate users; Need not interrupt customer service and remove to upgrade ONU, reduce cost.
Obviously; It is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize that they can concentrate on the single calculation element with the general calculation device; Perhaps be distributed on the network that a plurality of calculation element forms; Alternatively, they can be realized with the executable program code of calculation element, carried out by calculation element thereby can they be stored in the storage device; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, 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. speed optical signal transmission method more than a kind is characterized in that, is applied to comprise in the passive optical network PON:
Optical network unit ONU receives the light signal rate selection order that optical line terminal OLT is sent; And
The optical device of the light signal speed that said ONU selection comprises in ordering with said light signal rate selection carries out optical signal transmission;
Wherein, comprise at least two optical devices among the said ONU, the light signal of each optical device transmission different rates.
2. method according to claim 1 is characterized in that, said ONU select with said light signal rate selection order in the optical device of the light signal speed that comprises carry out optical signal transmission, comprise following one of arbitrarily:
Said ONU selects to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed; Said ONU switches to the optical signal transmission that second optical device of supporting said second speed carries out second speed; Wherein, said first rate is different with said second speed;
Said ONU selects to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order was second speed, said ONU opened the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously;
Said ONU selects its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
3. method according to claim 1 and 2 is characterized in that, the operation wavelength of said at least two optical devices is different.
4. method according to claim 3 is characterized in that, the operation wavelength of said at least two optical devices is different, comprising:
The upward signal of each optical device output realizes closing ripple output through a wavelength division multiplex device WDM1r; And the downstream signal of different operating wavelength arrives different optical devices through said WDM1r partial wave.
5. an optical network unit ONU is characterized in that, comprising:
At least two optical devices, wherein, each optical device is used to transmit the light signal of different rates.
6. optical network unit according to claim 5 is characterized in that, comprising:
Handover module; Be used for selecting to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed; Switch to the optical signal transmission that second optical device of supporting said second speed carries out second speed, wherein, said first rate is different with said second speed;
Opening module; Be used for selecting to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed, open the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously;
Select module, be used for selecting its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
7. according to claim 5 or 6 described optical network units; It is characterized in that; Said ONU also comprises wavelength division multiplex device WDM1r; Be used for not simultaneously, the upward signal of each optical device output realized closing ripple output in the operation wavelength of said at least two optical devices, with the downstream signal partial wave of different operating wavelength to different optical devices.
8. speed light signal transmission system more than a kind is characterized in that, is applied to comprise in the passive optical network PON:
Optical line terminal OLT is used to send the order of light signal rate selection;
Optical network unit ONU is used to receive said light signal rate selection order; The optical device of the light signal speed that selection comprises in ordering with said light signal rate selection carries out optical signal transmission; Wherein, comprise at least two optical devices among the said ONU, the light signal of each optical device transmission different rates.
9. system according to claim 8; It is characterized in that; Said ONU is further used for: select to support that in initial condition first optical device of first rate carries out the optical signal transmission of first rate, when the corresponding light signal speed of said light signal rate selection order is second speed, switch to the optical signal transmission that second optical device of supporting said second speed carries out second speed; Wherein, said first rate is different with said second speed; Perhaps; Select to support that in initial condition first optical device of said first rate carries out the optical signal transmission of first rate; When the corresponding light signal speed of said light signal rate selection order is second speed, open the optical signal transmission that second optical device of supporting said second speed carries out second speed simultaneously; Perhaps, select its all optical devices that comprise to carry out the optical signal transmission of different rates in initial condition.
10. according to Claim 8 or 9 described systems, it is characterized in that said ONU also comprises and close ripple/wave-dividing device WDM1r, be used in the operation wavelength of said at least two optical devices not simultaneously the upward signal of each optical device output not being realized closing ripple output; The downstream signal partial wave of different operating wavelength is arrived different optical devices.
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| CN201010557393.8A CN102480651B (en) | 2010-11-23 | 2010-11-23 | Multi-rate optical signal transmission method, multi-rate optical signal transmission system and optical network unit |
| PCT/CN2011/076067 WO2012068875A1 (en) | 2010-11-23 | 2011-06-21 | Method, system and optical network unit for transmitting multi-speed optical signals |
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| WO2012068875A1 (en) | 2012-05-31 |
| CN102480651B (en) | 2015-07-22 |
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