CN101197622A - Band width distribution method and device used for PON coexistence of different transmission rate - Google Patents
Band width distribution method and device used for PON coexistence of different transmission rate Download PDFInfo
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Abstract
The invention provides a bandwidth allocation method used for coexistence of PONs with different transmission rates, comprising the following steps: variety table items are arranged in an OLT and used for recording varieties of ONUs with different transmission rates; the OLT performs unified time slot allocation of the ONUs with different transmission rates according to the table items, and uplink bandwidth allocation table items are formed; moreover, bandwidth allocation instructions of the ONUs with different transmission rates are respectively born on corresponding downlink optical channels with different wavelengths according to the uplink bandwidth allocation table items. The invention also provides a bandwidth allocation device used for coexistence of the PONs with different transmission rates.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the bandwidth allocation methods and the device that are used for PON coexistence of different transmission rate.
Background technology
At present, many Internet business inserts from modes such as the dialing modem of 56K to several million, asymmetric digital line subscribers feeder (ADSL), cable modem (CM), VDSL respectively by transfer rate.But, for miscellaneous service is provided, as high-quality video information business, VoD (Video onDemand) business etc., the transmission of data approximately requires to have the bandwidth of 100M, can't meet the demands with above-mentioned several access waies, therefore, demand with the optical fibre installation Access Network increases rapidly, EPON (PON) can satisfy these new business demands and economic again just, operation maintenance is user access networks easily, be illustrated in figure 1 as PON multicast network structural representation, EPON inserts signal from optical network line terminal (OLT), distribute to each user side (ONU/ONT by Optical Distribution Network (ODN), ONT is an optic network user terminal, is located immediately at user side; And ONU is the optical-fiber network subscriber unit, and also has other network such as Ethernet between the user), can watch multi-media signal at user side.Wherein OLT is positioned at local side, and ONU/ONT is positioned at user side, and OLT is a down direction to the direction of ONU/ONT, otherwise is up direction.Down direction adopts based on time-multiplexed multicast mode, will be assigned to some output user sides by power averaging by the light signal of OLT input by ODN, branch prescription case such as generally have 1 minute 16,1 minutes 32 or 1 minutes 64.
The PON system of present commercialization is behavior 1Gbps transfer rate up and down.When 1: 32 branching ratio, each user can assign to 30M left and right sides bandwidth.Because the rise of networks such as IPTV, visual telephone service, the 30M bandwidth can not satisfy user's demand.
Therefore international main standard organizes IEEE, ITUT all setting about formulating the industrial standard of 10Gbps EPON and high transmission rates TDMA-PON.The transfer rate of 10Gbps PON will reach 10Gbps, so each user's bandwidth will raise 10 times and reach 300Mbps.
But under the situation that still has a large amount of 1Gbps PON users at present, 10Gbps PON must can with 1Gbps PON coexistence of systems.
Fig. 2 is the co-existence schemes of the optimum that obtains behind the comprehensive various factors.Descending 10Gbps ONU adopts 1550 wavelength, and 1Gbps ONU still adopts 1490 wavelength, up shared one 1310 wavelength.
In present PON, allocated bandwidth all is that the ONU with a kind of transfer rate is distributed.Yet when having different transfer rate ONU among the PON, for example be 10Gbps and 1GbpsONU, according to the shared up wavelength of related art scheme, therefore need OLT to unify scheduling in time, and need to seek a kind of bandwidth allocation methods of full blast.
Therefore, the solution that people need a kind of PON coexistence of different transmission rate Time Bandwidth to distribute can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The present invention aims to provide a kind of bandwidth allocation methods and device, needs OLT to unify problems such as scheduling in time during with solution correlation technique PON coexistence of different transmission rate.
According to an aspect of the present invention, provide a kind of bandwidth allocation methods that is used for PON coexistence of different transmission rate, may further comprise the steps: the kind list item has been set in OLT, is used to write down the kind of different transmission rate ONU; OLT unifies time slot allocation according to above-mentioned list item to different transmission rate ONU, forms upstream bandwidth and distributes list item; And distribute list item according to described upstream bandwidth, the allocated bandwidth instruction of different transmission rate is carried to respectively on the descending optical channel of different wave length.
According to a further aspect in the invention, provide a kind of allocated bandwidth device that is used for PON coexistence of different transmission rate, comprising: the kind list item is provided with module, is used at OLT the kind list item being set, with the kind of record different transmission rate ONU; The time slot allocation module is used to make OLT according to above-mentioned list item different transmission rate ONU to be unified time slot allocation, forms upstream bandwidth and distributes list item; And bandwidth allocation module, be used for distributing list item according to described upstream bandwidth, the allocated bandwidth of different transmission rate is instructed be carried to respectively on the descending optical channel of different wave length.
According to a further aspect in the invention, provide a kind of method of definite ONU downstream rate, may further comprise the steps:
In discovery procedure, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength;
For the ONU of described specific downstream rate offers special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
According to a further aspect in the invention, provide a kind of device of definite ONU downstream rate, having comprised:
Find that message issues module, be used for, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength in discovery procedure;
ONU downstream rate determination module is used to the ONU of described specific downstream rate to offer special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
According to a further aspect in the invention, provide a kind of definite different rates ONU the affiliated method of finding window, may further comprise the steps:
In discovery procedure, receive from ONU with find window corresponding protocols message, described protocol massages comprises identification information, the corresponding relation of window and downstream rate is found in described identification information indication;
According to downstream rate and the described identification information of ONU, determine the discovery window that described ONU is affiliated.
According to a further aspect in the invention, provide a kind of definite different rates ONU the affiliated device of finding window, having comprised:
Receiver module is used in discovery procedure, receive from ONU with find window corresponding protocols message, described protocol massages comprises identification information, the corresponding relation of window and downstream rate is found in described identification information indication;
Determination module according to downstream rate and the described identification information of ONU, is determined the discovery window that described ONU is affiliated.
By technique scheme, the present invention utilizes the classified information of OLT management ONU, unifies time slot allocation according to classified information, thereby has realized the allocated bandwidth of full blast, and the present invention has realized following technique effect:
1) solved allocated bandwidth in PON coexistence of different transmission rate;
2) provide the bandwidth allocation methods of full blast among a kind of PON of coexistence.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Fig. 1 shows the structural representation according to PON network system of the prior art;
Fig. 2 shows the PON network diagram according to 10Gbps in the prior art and 1Gbps ONU coexistence;
Fig. 3 shows the method flow diagram according to definite ONU downstream rate of the present invention;
Fig. 4 shows the block diagram according to definite ONU downstream rate device of the present invention;
Fig. 5 shows the bandwidth allocation methods flow chart that is used for PON coexistence of different transmission rate according to of the present invention;
Fig. 6 shows the block diagram that is used for the allocated bandwidth device of PON coexistence of different transmission rate according to of the present invention;
Fig. 7 shows the schematic diagram of the switching time of 1Gbps according to an embodiment of the invention and 10Gbps transfer rate laser respectively;
Fig. 8 shows the contrast schematic diagram of the guard time between the message between 1Gbps according to an embodiment of the invention and the 10Gbps transfer rate; And
Fig. 9 shows the schematic diagram that compares between the different bandwidth allocative efficiency according to an embodiment of the invention;
Figure 10 shows according to the method flow diagram of finding window under definite different rates ONU of the present invention;
Figure 11 shows according to the block diagram of finding the device of window under definite different rates ONU of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
The present invention proposes, because different downstream rate ONU such as 10Gbps ONU adopt different downstream wavelength with 1Gbps ONU.
The embodiment of the invention provides a kind of method of definite ONU downstream rate, may further comprise the steps as Fig. 3:
Step S302 in discovery procedure, issues the discovery message that sends to specific downstream rate ONU by corresponding wavelength;
Step S304 is for the ONU of described specific downstream rate offers special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
For example, in discovery procedure, the discovery message of 10Gbps ONU is issued to 10Gbps ONU by respective wavelength such as 1550nm wavelength, and opens one and aim at the discovery window that 10Gbps ONU offers, therefore as long as all be 10Gbps ONU at this ONU that finds window registration.In like manner the discovery message of 1Gbps ONU is issued to 1Gbps ONU by respective wavelength such as 1490nm wavelength, and opens one and aim at the discovery window that 1GbpsONU begins, as long as all be 1Gbps ONU at this ONU that finds window registration.
Fig. 4 shows the device 400 according to the acquisition ONU downstream rate of the embodiment of the invention, and it comprises:
Find that message issues module 402, be used for, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength in discovery procedure;
ONU downstream rate determination module 404 is used to the ONU of described specific downstream rate to offer special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
Optionally, described specific downstream rate comprises 10Gbps or 1Gbps.When described specific downstream rate was 10Gbps, described discovery message issued module 402 and is further used for described discovery message is issued by the 1550nm wavelength.When described specific downstream rate was 1Gbps, described discovery message issued module 402 and is further used for described discovery message is issued by the 1490nm wavelength.
Because different upstream rate ONU such as 10Gbps ONU adopt identical up wavelength with 1Gbps ONU, and bimodulus or multimode rake receiver can be set, and identify the upstream rate of ONU.
Fig. 5 shows the bandwidth allocation methods that is used for PON coexistence of different transmission rate according to the embodiment of the invention, and it may further comprise the steps:
Step S502 is provided with the kind list item in OLT, be used to write down the kind of different transmission rate ONU, can identify uplink rate and the downlink transfer rate of ONU according to this kind;
Step S504, OLT unifies time slot allocation according to above-mentioned list item to different transmission rate ONU, forms upstream bandwidth and distributes list item; And
Step S506 distributes list item according to described upstream bandwidth, the allocated bandwidth of different transmission rate is instructed be carried to respectively on the descending optical channel of different wave length.Also can will send to the data of different downstream rate ONU, be put into respectively on the pairing wavelength of its downstream rate.
Alternatively, different transmission rate ONU comprises high transmission rates ONU and low transfer rate ONU, and the kind list item that is provided with in OLT comprises two kinds, is respectively high transmission rates and low transfer rate.
Step S504 can comprise ONU is divided into two groups by the transfer rate difference, makes high transmission rates ONU ascending time slot adjacent, makes low transfer rate ONU ascending time slot adjacent.
Alternatively, high transmission rates ONU is 10Gbps ONU, and low transfer rate ONU is 1Gbps ONU.
Step S504 may further comprise the steps: the allocated bandwidth instruction of the ONU of 10Gbps is put into the ONU that sends to 10Gbps on corresponding wavelength such as the 1550nm wavelength, the allocated bandwidth instruction of the ONU of 1Gbps is put into the ONU that sends to 1Gbps on corresponding wavelength such as the 1490nm wavelength.
Fig. 6 shows the allocated bandwidth device 600 that is used for PON coexistence of different transmission rate according to the embodiment of the invention, and it comprises:
The kind list item is provided with module 602, is used at OLT the kind list item being set, and with the kind of record different transmission rate ONU, can identify uplink rate and the downlink transfer rate of ONU according to this kind;
Time slot allocation module 604 is used to make OLT according to above-mentioned list item different transmission rate ONU to be unified time slot allocation, forms upstream bandwidth and distributes list item; And
Bandwidth allocation module 606 is used for distributing list item according to described upstream bandwidth, the allocated bandwidth of different transmission rate is instructed be carried to respectively on the descending optical channel of different wave length.Also can will send to the data of different downstream rate ONU, be put into respectively on the pairing wavelength of its downstream rate.
Alternatively, different transmission rate ONU comprises high transmission rates ONU and low transfer rate ONU, and the kind list item that is provided with in OLT comprises two kinds, is respectively high transmission rates and low transfer rate.
Time slot allocation module 604 can be used for ONU is divided into two groups by the transfer rate difference, makes high transmission rates ONU ascending time slot adjacent, makes low transfer rate ONU ascending time slot adjacent.
Alternatively, high transmission rates ONU is 10Gbps ONU, and low transfer rate ONU is 1Gbps ONU.
Time slot allocation module 604 can be used for the instruction of the allocated bandwidth of the ONU of 10Gbps is put into the ONU that sends to 10Gbps on the 1550nm wavelength, and the allocated bandwidth instruction of the ONU of 1Gbps is put into the ONU that sends to 1Gbps on the 1490nm wavelength.
From above description as can be seen, the present invention utilizes the classified information of OLT management ONU, unifies time slot allocation according to classified information, thereby has realized the allocated bandwidth of full blast.
OLT is recorded in the classified information of these ONU in the list item, and is as shown in table 1:
Table 1
| Sequence number | Transfer | Sequence number | |
| 1 | 10Gbps | 12654 | |
| 2 | 10Gbps | 25846 | |
| 3 | 1Gbps | 98542 |
In PON network shown in Figure 2, comprise the ONU of two kinds of different transmission rates, the physical layer parameter of their optical modules has bigger difference, and is as shown in table 2:
Table 2
| Parameter | 10G EPON | 1G EPON |
| Laser switching time | 30ns | 512ns |
| Gain fast and the clock recovery time | 40ns | 400ns |
Fig. 7 shows the schematic diagram of the switching time of 1Gbps according to an embodiment of the invention and 10Gbps transfer rate laser respectively.
With reference to Fig. 7, in the PON of high transmission rates low transfer rate ONU coexistence, because two kinds of shared same up wavelength of ONU must carry out time slot allocation to the ONU unification of two kinds of transfer rates when therefore carrying out allocated bandwidth.In distributing the process of time slot, consider two kinds of ONU physical parameter on difference.For example the clock recovery time of the laser switching time of 1Gbps ONU and OLT all slow many than 10Gbps, therefore many greatly than 10Gbps of the interval between the uplink message that sends of different 1Gbps ONU.
The effect of guard time is that after laser distributed message, closing laser also needed a period of time, before laser thoroughly is closed, still can send laser, disturbs the communication of other ONU.And the laser of the ONU of the transmission message of back is opened also and is needed the regular hour, also can send laser before thoroughly opening, but power can not satisfy the proper communication requirement.
Fig. 8 shows the contrast schematic diagram of the guard time between the message between 1Gbps according to an embodiment of the invention and the 10Gbps transfer rate.Fig. 9 shows the schematic diagram that compares between the different bandwidth allocative efficiency according to an embodiment of the invention.
With reference to Fig. 8; because the switching time of the laser of the ONU of 1Gbps is more a lot of than the length of 10Gbps; if the message of 10Gbps message and 1Gbps is adjacent; the ONU of 10Gbps will wait for that the ONU of 1Gbps thoroughly closes laser; could send upward signal, guard time between the two is than all being the much longer of 10Gbps.And when gaining with clock recovery in OLT fast, if variation has taken place for transfer rate and power, the circuit response also will expend more time.With reference to Fig. 9, if the 10Gbps uplink message is divided into one group, the uplink message of 1Gbps is divided into one group, the allocative efficiency of raising upstream bandwidth that then can be bigger.
OLT forms an allocated bandwidth list item after the ONU to two kinds of different transfer rates unifies time slot allocation, as shown in table 3:
Table 3
| ONUID | Time started | During end |
| Between | ||
| 1 | 00 | 11 |
| 2 | 13 | 18 |
| 3 | 20 | 28 |
| 4 | 35 | 42 |
| 5 | 49 | 58 |
OLT is according to the content of this list item, and the allocated bandwidth instruction of the ONU of 10Gbps is put into the ONU that sends to 10Gbps on the 1550nm wavelength.The allocated bandwidth instruction of the ONU of 1Gbps is put into the ONU that sends to 1Gbps on the 1490nm wavelength.
The embodiment of the invention also provides a kind of definite different rates ONU the affiliated method of finding window, and as shown in figure 10, handling process is as follows:
Step S1002, in discovery procedure, receive from ONU with find window corresponding protocols message, described protocol massages comprises identification information, the corresponding relation of window and downstream rate is found in described identification information indication;
Step S1004 according to downstream rate and the described identification information of ONU, determines the discovery window that described ONU is affiliated.
The embodiment of the invention also provides a kind of definite different rates ONU the affiliated device of finding window, as shown in figure 11, comprising:
Determination module 1104 according to downstream rate and the described identification information of ONU, is determined the discovery window that described ONU is affiliated.
As can be seen from the above description, the present invention has realized following technique effect:
In the embodiment of the invention, ONU is carried out time slot allocation, form upstream bandwidth and distribute list item, can make the efficient of allocated bandwidth higher according to the upstream rate of ONU; Distribute list item according to described upstream bandwidth, allocated bandwidth is instructed to send to ONU with the corresponding wavelength of the downstream rate of ONU, thereby when different rates PON coexists, speed and bandwidth, wavelength is corresponding, realize OLT unified scheduling in time, the allocated bandwidth solution when forming different rates PON coexistence.
In the embodiment of the invention, in discovery procedure, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength; For the ONU of described specific downstream rate offers special discovery window, as long as follow-up by in described discovery window registration, the downstream rate that can determine ONU is described specific downstream rate, thereby makes the acquisition of downstream rate simple and fast.In addition, the embodiment of the invention is used to indicate the corresponding relation of finding window and downstream rate by introduce identification information in discovery procedure; Follow-up downstream rate and described identification information according to ONU can be determined the discovery window that described ONU is affiliated, offer the different solutions of finding windows thereby be embodied as different rates ONU.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, 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, thereby, they can be stored in the storage device and carry out by calculation element, 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.Should be understood that the variation in these concrete enforcements is conspicuous for a person skilled in the art, do not break away from spiritual protection range of the present invention.
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 (20)
1. a bandwidth allocation methods that is used for PON coexistence of different transmission rate is characterized in that, may further comprise the steps:
The kind list item is set in OLT, is used to write down the kind of different transmission rate ONU;
OLT unifies time slot allocation according to above-mentioned list item to different transmission rate ONU, forms upstream bandwidth and distributes list item; And
Distribute list item according to described upstream bandwidth, the allocated bandwidth of different transmission rate ONU is instructed be carried to respectively on the descending optical channel of corresponding different wave length.
2. bandwidth allocation methods as claimed in claim 1 is characterized in that, described different transmission rate ONU comprises high transmission rates ONU and low transfer rate ONU, and the kind list item that is provided with in OLT comprises high transmission rates and low transfer rate.
3. bandwidth allocation methods as claimed in claim 2 is characterized in that, unifies time slot allocation and comprises ONU and to make high transmission rates ONU ascending time slot adjacent by the transfer rate different grouping, makes low transfer rate ONU ascending time slot adjacent.
4. bandwidth allocation methods as claimed in claim 3 is characterized in that described high transmission rates ONU comprises the ONU of 10Gbps transfer rate, and described low transfer rate ONU comprises the ONU of 1Gbps transfer rate.
5. bandwidth allocation methods as claimed in claim 4 is characterized in that, unifies time slot allocation and may further comprise the steps:
The allocated bandwidth instruction of the ONU of 10Gbps is put into the ONU that sends to 10Gbps on the 1550nm wavelength, the allocated bandwidth instruction of the ONU of 1Gbps is put into the ONU that sends to 1Gbps on the 1490nm wavelength.
6. an allocated bandwidth device that is used for PON coexistence of different transmission rate is characterized in that, comprising:
The kind list item is provided with module, is used at OLT the kind list item being set, with the kind of record different transmission rate ONU;
The time slot allocation module is used to make OLT according to above-mentioned list item different transmission rate ONU to be unified time slot allocation, forms upstream bandwidth and distributes list item; And
Bandwidth allocation module is used for distributing list item according to described upstream bandwidth, the allocated bandwidth of different transmission rate ONU is instructed be carried to respectively on the descending optical channel of corresponding different wave length.
7. allocated bandwidth device as claimed in claim 6 is characterized in that, described different transmission rate ONU comprises high transmission rates ONU and low transfer rate ONU, and the kind list item that is provided with in OLT comprises high transmission rates and low transfer rate.
8. allocated bandwidth device as claimed in claim 7 is characterized in that, described time slot allocation module is further used for ONU making high transmission rates ONU ascending time slot adjacent by the transfer rate different grouping, makes low transfer rate ONU ascending time slot adjacent.
9. allocated bandwidth device as claimed in claim 8 is characterized in that, described high transmission rates ONU comprises 10Gbps ONU, and described low transfer rate ONU comprises 1Gbps ONU.
10. allocated bandwidth device as claimed in claim 9, it is characterized in that, described time slot allocation module is further used for the instruction of the allocated bandwidth of the ONU of 10Gbps is put into the ONU that sends to 10Gbps on the 1550nm wavelength, and the allocated bandwidth instruction of the ONU of 1Gbps is put into the ONU that sends to 1Gbps on the 1490nm wavelength.
11. the method for a definite ONU downstream rate is characterized in that, may further comprise the steps:
In discovery procedure, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength;
For the ONU of described specific downstream rate offers special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
12. method as claimed in claim 11 is characterized in that, described specific downstream rate comprises 10Gbps or 1Gbps.
13. method as claimed in claim 12 is characterized in that, when described specific downstream rate was 10Gbps, described discovery message issued by the 1550nm wavelength.
14. method as claimed in claim 12 is characterized in that, when described specific downstream rate was 1Gbps, described discovery message issued by the 1490nm wavelength.
15. the device of a definite ONU downstream rate is characterized in that, comprising:
Find that message issues module, be used for, the discovery message that sends to specific downstream rate ONU is issued by corresponding wavelength in discovery procedure;
ONU downstream rate determination module is used to the ONU of described specific downstream rate to offer special discovery window, the ONU that the ONU that is registered in this discovery window is defined as having described specific downstream rate.
16. device as claimed in claim 15 is characterized in that, described specific downstream rate comprises 10Gbps or 1Gbps.
17. device as claimed in claim 16 is characterized in that, when described specific downstream rate was 10Gbps, described discovery module was further used for described discovery message is issued by the 1550nm wavelength.
18. device as claimed in claim 16 is characterized in that, when described specific downstream rate was 1Gbps, described discovery module was further used for described discovery message is issued by the 1490nm wavelength.
19. the affiliated method of finding window of definite different rates ONU is characterized in that, may further comprise the steps:
In discovery procedure, receive from ONU with find window corresponding protocols message, described protocol massages comprises identification information, the corresponding relation of window and downstream rate is found in described identification information indication;
According to downstream rate and the described identification information of ONU, determine the discovery window that described ONU is affiliated.
20. the affiliated device of finding window of definite different rates ONU is characterized in that, comprising:
Receiver module is used in discovery procedure, receive from ONU with find window corresponding protocols message, described protocol massages comprises identification information, the corresponding relation of window and downstream rate is found in described identification information indication;
Determination module according to downstream rate and the described identification information of ONU, is determined the discovery window that described ONU is affiliated.
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| CN102379105B (en) * | 2009-04-07 | 2014-04-23 | 株式会社日立制作所 | Optical multiplexing terminating device, passive optical network system, and method for allocating frequency |
| CN102379105A (en) * | 2009-04-07 | 2012-03-14 | 株式会社日立制作所 | Optical multiplexing terminating device, passive optical network system, and method for allocating frequency |
| CN101877798B (en) * | 2009-04-30 | 2014-08-13 | 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 |
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| CN101984777B (en) * | 2009-05-28 | 2013-06-12 | 富士通网络通讯株式会社 | Passive optical network system, station equipment in passive optical network system, and a control method thereof |
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| CN101959087B (en) * | 2009-07-15 | 2014-12-17 | 中兴通讯股份有限公司 | Multicast processing method and device |
| CN102006526A (en) * | 2009-09-01 | 2011-04-06 | 中兴通讯股份有限公司 | Method and device for processing broadcast packet/multicast control message |
| WO2013053249A1 (en) * | 2011-10-14 | 2013-04-18 | 中兴通讯股份有限公司 | Optical signal transmission method and device |
| CN103051984A (en) * | 2011-10-14 | 2013-04-17 | 中兴通讯股份有限公司 | Method and device for transmitting optical signal |
| US9306700B2 (en) | 2011-10-14 | 2016-04-05 | Zte Corporation | Method and device for transmitting optical signals |
| CN103051984B (en) * | 2011-10-14 | 2017-09-12 | 中兴通讯股份有限公司 | Optical signal transmission method and device |
| WO2018227624A1 (en) * | 2017-06-16 | 2018-12-20 | 华为技术有限公司 | Data packet processing method, device and system |
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