CN104219122A - Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides - Google Patents
Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides Download PDFInfo
- Publication number
- CN104219122A CN104219122A CN201410424655.1A CN201410424655A CN104219122A CN 104219122 A CN104219122 A CN 104219122A CN 201410424655 A CN201410424655 A CN 201410424655A CN 104219122 A CN104219122 A CN 104219122A
- Authority
- CN
- China
- Prior art keywords
- onu
- olt
- detection messages
- mac
- loop
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides and relates to the field of the PON (passive optical network). The detection method includes that the OLTs transmit detection messages to the downlink at fixed time, target MAC (media access control) addresses and source MAC addresses are different from each other and filled into the detection messages; Ethernet protocol fields, randomly set anti-counterfeiting coding fields and VLAN (virtual local area network) information are also filled in the detection messages, and the default detection messages have no VLAN information; the OLTs determine whether loops exist or not by receiving response messages of the detection messages; the target MAC addresses and the source MAC addresses in the detection messages are acquired, corresponding PON passwords are acquired by the MAC addresses of the OLTs, corresponding ONU passwords are acquired by the MAC addresses of the PON passwords, and corresponding ports are acquired by the MAC addresses of the ONUs. By the detection method, existence of the far-end ONU loops can be determined, and port information of the loops can be quickly and accurately positioned.
Description
Technical field
The present invention relates to EPON field, is specifically the detection method of OLT local side quick position far-end ONU loop ports.
Background technology
The character of PON (Passive Optical Network, the abbreviation of EPON) medium is the combination of shared medium and point to point network.
Down direction: as shown in Figure 1, OLT (opticallineterminal, optical line terminal) Ethernet data that sends is subject to ODN (the Optical Distribution Network crossing a 1:n, passive optical splitter) or what passive optical splitter be sent to each ONU (Optical Network Unit, optical network unit).The typical value of n is 4,8,16,32,64 etc. (limited by available optical power budget), and this behavioural characteristic is identical with shared media network; Because Ethernet has broadcast characteristic, match with PON structure, OLT broadcast data packet, object ONU selectively extracts.
Up direction: as shown in Figure 1, due to the directional characteristic of passive light mixer, the packet that any one ONU sends can only arrive OLT, and can not arrive other ONU.PON is identical with point to point network at the behavioral characteristic of up direction; But be different from a real point to point network, in pon, all ONU belong to same collision domain, still may conflict if transmitted from the packet of different ONU simultaneously.Therefore at up direction, PON needs to adopt arbitration mechanism to avoid data collision, when ONU has data message to need upwards to send, apply for OLT, OLT distributes corresponding bandwidth to this ONU according to the up sequential of having distributed as far as possible, the principle of this allocated bandwidth is distribution according to need, and this technology ensure that the peak use rate of bandwidth in PON system largely.
As shown in Figure 2, all loops that may exist in PON system, loopback on ONU refers to two kinds of following situations: between ONU two ports, have one from ring head (in as Fig. 3 loop2), or exist from ring head or loop (in as Fig. 3 loop1) on the Ethernet switch or bridge of ONU cascade, suppose that all of the port is at a VLAN (Virtual Local Area Network, VLAN) in, loop so on OLT also comprises a kind of special loop except two kinds of situations above: the physical connection loop (as loop3 in Fig. 3) between different ONU.
At ONU and OLT internal user by two-layer protocol access network, the forwarding of message is by mac address forwarding table addressing.When ONU occurring loop, the data message of same source MAC can appear at inbound port and the outbound port of exchange chip simultaneously, causes MAC Address to be shaken, and affects the forwarding of normal flow.Simultaneously a large amount of broadcasting packet can copy forwarding in a large number between two of a loop port, and a large amount of broadcasting packets can forward to OLT by the broadcast storm caused.ONU now can constantly uplink bandwidth application, a large amount of bandwidth is caused extremely to be taken, the uplink bandwidth request of all ONU under this PON system may be had influence on time serious be not being met, when saving bit by bit to a certain extent, the mass data message of other ONU can be caused to be dropped.
With existing technology, it is realize loop detection on ONU that the effective way of solution ONU second line of a couplet loop mainly contains two: one, removes this loop, thus abolish the possibility of broadcast storm after finding loop; One is on ONU, realize unknown bag suppress, and is controlled in the least possible scope by up unknown broadcast packet.
These two ways have some limitations, first way is only supported by Protocol at present on the equipment such as MDU, MGU, for SFU equipment then support more weak, and this way can only detect the loop between two ports of this ONU, or the loop in a port second line of a couplet switch, then helpless for the loop between different ONU, particularly between the ONU of different producer, although they achieve loop detection function, their detection messages probably effectively can not be identified by the other side; Even if between the ONU with producer, because loop detection function adds anti-fraud function, the detection messages that the other side ONU sends can be used as malicious attack message, still may examine and not measure this loop.
Second way can ensure the unknown bag quantitative value that this ONU is up effectively, but if contain the message (such as STP, IGMP etc.) of some agreement in these unknown messages, then may have an impact to the normal process of agreement; And when a large amount of ONU forwards this unknown message, also larger burden will be formed to OLT system.
Consider above situation, OLT system must have the way of a set of simple and fast find this loop fault as early as possible, to ensure the stable operation of whole system.
Summary of the invention
For the defect existed in prior art, the object of the present invention is to provide the detection method of OLT local side quick position far-end ONU loop ports, determine the existence of far-end ONU loop, and quick and precisely can locate the port information of loop appearance.
For reaching above object, the technical scheme that the present invention takes is: the detection method of OLT local side quick position far-end ONU loop ports, comprises step:
S1.OLT timing, to descending transmission detection messages, fill in target MAC (Media Access Control) address and source MAC, and source MAC is different from the MAC Address of ONU in detection messages; Detection messages also fill in too fidonetFido field, anti-fake code field and vlan information are set at random, default detection messages is not with vlan information;
S2.OLT determines to there is loop by the reply message receiving described detection messages;
S3. obtain target MAC (Media Access Control) address and source MAC in detection messages, obtain corresponding PON slogan by the mac address table of OLT, and obtain corresponding No. ONU by the mac address table of PON mouth, obtain corresponding port by the mac address table of ONU.
On the basis of technique scheme, described detection messages adopts common IP message, the Ethernet protocol field references detection messages type that its inside is filled in, and described Ethernet protocol field requires not conflict with protocol fields 0x8100 phase.
On the basis of technique scheme, described detection messages also comprises other fields making it meet ethernet standard word length, and the messaging system referred to for inadequate word length can form other fields by interpolation filling word automatically.
On the basis of technique scheme, the source MAC of described detection messages is 00:01:02:03:04:05, and Ethernet protocol field is 0x9000, and anti-fake code field is 0xFFFF, described vlan information refers to detection messages and is with VLAN value, and its span is 1 ~ 4096.
On the basis of technique scheme, described S1 fills in detection messages and the detailed step sent is:
S11. detection messages target MAC (Media Access Control) address and source MAC is filled;
S12. according to the equipment state of ONU, judge that detection messages is the need of with VLAN, if so, enters S13; If not, S15 is entered;
S13. judge whether to have traveled through all VLAN, if so, enter S17; If not, S14 is entered;
S14. the field of vlan information is filled;
S15. too fidonetFido field and the anti-fake code field of detection messages is filled;
S16. the detection messages of filling is sent completely;
S17. terminate.
On the basis of technique scheme, OLT comprises the line card of multiple bearer service, and check the mac address table of OLT, if find, certain line card learning has arrived described source MAC, then determine to there is loop under this line card; If find, multiple line card learning has arrived described source MAC, then all there is loop under multiple line card.
On the basis of technique scheme, the detailed step of described S3 is:
S31. obtain the mac address table of OLT, judge in this mac address table, whether to there is the source MAC filled in S1, if not, enter S32; If so, S33 is entered;
S32., after time delay a period of time, again S31 is entered;
S33. the PON slogan that described in the mac address table obtaining OLT, source MAC is corresponding;
S34. according to the mac address table of PON mouth place chip, No. ONU that described source MAC is corresponding is obtained;
S35. obtain the mac address table of ONU, find out the port of study to described source MAC;
S36. close described port, and report loopback alarm.
On the basis of technique scheme, in described S32, the time of time delay is set as 80 seconds.
Beneficial effect of the present invention is: by the setting of descending detection messages, and its source MAC can never appear on the port of ONU, once the port of ONU has found this source MAC, so can determine that this port certainly exists loop.The present invention releases MDU (Multiplex Dwelling Unit, multitenant unit) and HGU (Home Gateway Unit, home gateway unit) equipment performs the resource of loop detection and pressure, SFU (Single Family Unit can be detected, single home unit) loop message of equipment, do not need line card to carry out the descending detection messages of extra collection, add index, send the operations such as descending detection messages, and quick and precisely can locate the port information of loop appearance.
Accompanying drawing explanation
Fig. 1 is the up-downgoing data flow characteristics schematic diagram of PON system in background technology;
Fig. 2 is the loop schematic diagram that in background technology, PON system may exist;
Fig. 3 is the detection method flow chart of OLT local side quick position far-end ONU loop ports of the present invention;
Fig. 4 is the form schematic diagram of detection messages of the present invention;
Fig. 5 is the detail flowchart of S1 in Fig. 4;
Fig. 6 is the detail flowchart of S3 in Fig. 4.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 3, the detection method of OLT local side quick position far-end ONU loop ports, comprises step:
S1.OLT timing is to descending transmission detection messages, and timing is set as 80 seconds.As shown in Figure 4, detection messages adopts common IP message, and it comprises target MAC (Media Access Control) address and source MAC, and object MAC is the broadcasting packet of full FF, and target MAC (Media Access Control) address is the object physical address that message will arrive; Source MAC refers to the physical address that message sends ground, and source MAC is different from the MAC Address of ONU, avoids obscuring with common HOST MAC phase.Detection messages also fill in too fidonetFido field, anti-fake code field, vlan information and other fields are set at random, default detection messages is not with vlan information; Ethernet protocol field refers to the type of detection messages, is used for doing message identification; Anti-fake code field refers to screen counterfeit message; Vlan information refers to the incidental VLAN value of this detection messages, and span is 1 ~ 4096; Messaging system for inadequate word length automatically can add filling word and form other fields, makes it meet ethernet standard word length.In the present embodiment, source MAC uses 00:01:02:03:04:05, and Ethernet protocol type is 0x9000, and anti-fake code field is 0xFFFF.
S2.OLT determines to there is loop by the reply message receiving described detection messages.Specifically, OLT comprises the line card of a center card and multiple bearer service, the slot of center card is inserted with line card, OLT checks mac address table on the card of center, if find, certain line card learning has arrived up source MAC (00:01:02:03:04:05), then determine to there is loop under this line card; If find, multiple line card learning has arrived described source MAC, then all there is loop under multiple line card.
S3. obtain target MAC (Media Access Control) address and source MAC in detection messages, obtain corresponding PON slogan by the mac address table of OLT, and obtain corresponding No. ONU by the mac address table of PON mouth, obtain corresponding port by the mac address table of ONU.
As shown in Figure 5, above-mentioned S1 fills in the detailed step of message and transmission and is:
S11. detection messages target MAC (Media Access Control) address and source MAC is filled;
S12. according to the equipment state of ONU, judge that detection messages is the need of with VLAN, if so, enters S13; If not, S15 is entered;
S13. judge whether to have traveled through all VLAN, if so, enter S17; If not, S14 is entered;
S14. the field of vlan information is filled;
S15. too fidonetFido field and the anti-fake code field of detection messages is filled;
S16. the detection messages of filling is sent completely;
S17. terminate.
Wherein, when the equipment state of ONU can be determined to fill certain VLAN time, need not travel through, directly fill the vlan information field of specifying, all the other steps are constant.
As shown in Figure 6, the detailed step of above-mentioned S3 is:
S31. obtain the mac address table of OLT, judge in this mac address table, whether to there is the source MAC filled in S1, if not, enter S32; If so, S33 is entered;
S32. time delay is after 80 seconds, again enters S31;
S33. the PON slogan that described in the mac address table obtaining OLT, source MAC is corresponding;
S34. according to the mac address table of PON mouth place chip, No. ONU that described source MAC is corresponding is obtained;
S35. obtain the mac address table of ONU, find out the port of study to described source MAC;
S36. close described port, and report loopback alarm.
The present invention is not limited to above-mentioned execution mode, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (8)
1. a detection method for OLT local side quick position far-end ONU loop ports, is characterized in that, comprise step:
S1.OLT timing, to descending transmission detection messages, fill in target MAC (Media Access Control) address and source MAC, and source MAC is different from the MAC Address of ONU in detection messages; Detection messages also fill in too fidonetFido field, anti-fake code field and vlan information are set at random, default detection messages is not with vlan information;
S2.OLT determines to there is loop by the reply message receiving described detection messages;
S3. obtain target MAC (Media Access Control) address and source MAC in detection messages, obtain corresponding PON slogan by the mac address table of OLT, and obtain corresponding No. ONU by the mac address table of PON mouth, obtain corresponding port by the mac address table of ONU.
2. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, it is characterized in that: described detection messages adopts common IP message, the Ethernet protocol field references detection messages type that its inside is filled in, described Ethernet protocol field requires not conflict with protocol fields 0x8100 phase.
3. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, it is characterized in that: described detection messages also comprises other fields making it meet ethernet standard word length, the messaging system referred to for inadequate word length can form other fields by interpolation filling word automatically.
4. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, it is characterized in that: the source MAC of described detection messages is 00:01:02:03:04:05, Ethernet protocol field is 0x9000, anti-fake code field is 0xFFFF, described vlan information refers to detection messages and is with VLAN value, and its span is 1 ~ 4096.
5. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, is characterized in that: described S1 fills in detection messages and the detailed step sent is,
S11. detection messages target MAC (Media Access Control) address and source MAC is filled;
S12. according to the equipment state of ONU, judge that detection messages is the need of with VLAN, if so, enters S13; If not, S15 is entered;
S13. judge whether to have traveled through all VLAN, if so, enter S17; If not, S14 is entered;
S14. the field of vlan information is filled;
S15. too fidonetFido field and the anti-fake code field of detection messages is filled;
S16. the detection messages of filling is sent completely;
S17. terminate.
6. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, it is characterized in that: OLT comprises the line card of multiple bearer service, check the mac address table of OLT, if find, certain line card learning has arrived described source MAC, then determine to there is loop under this line card; If find, multiple line card learning has arrived described source MAC, then all there is loop under multiple line card.
7. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 1, is characterized in that: the detailed step of described S3 is,
S31. obtain the mac address table of OLT, judge in this mac address table, whether to there is the source MAC filled in S1, if not, enter S32; If so, S33 is entered;
S32., after time delay a period of time, again S31 is entered;
S33. the PON slogan that described in the mac address table obtaining OLT, source MAC is corresponding;
S34. according to the mac address table of PON mouth place chip, No. ONU that described source MAC is corresponding is obtained;
S35. obtain the mac address table of ONU, find out the port of study to described source MAC;
S36. close described port, and report loopback alarm.
8. the detection method of OLT local side quick position far-end ONU loop ports as claimed in claim 7, is characterized in that: in described S32, the time of time delay is set as 80 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424655.1A CN104219122A (en) | 2014-08-26 | 2014-08-26 | Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424655.1A CN104219122A (en) | 2014-08-26 | 2014-08-26 | Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104219122A true CN104219122A (en) | 2014-12-17 |
Family
ID=52100275
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410424655.1A Pending CN104219122A (en) | 2014-08-26 | 2014-08-26 | Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104219122A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539348A (en) * | 2015-01-06 | 2015-04-22 | 烽火通信科技股份有限公司 | PON system link loopback detection method and device |
| CN105119777A (en) * | 2015-09-07 | 2015-12-02 | 烽火通信科技股份有限公司 | Link loopback detection method in passive optical network (PON) system |
| CN105553739A (en) * | 2015-12-25 | 2016-05-04 | 瑞斯康达科技发展股份有限公司 | Method and device for tracking MAC addresses |
| CN105591692A (en) * | 2015-11-04 | 2016-05-18 | 杭州华三通信技术有限公司 | Method and device of loop elimination in Ethernet passive optical network (EPON) |
| CN106941634A (en) * | 2017-05-18 | 2017-07-11 | 烽火通信科技股份有限公司 | The method and system of OLT loopback detections in a kind of GPON systems |
| CN108123752A (en) * | 2017-12-29 | 2018-06-05 | 武汉长光科技有限公司 | A kind of EPON accurate loop detection methods based on geography information positioning |
| CN109309604A (en) * | 2018-11-15 | 2019-02-05 | 锐捷网络股份有限公司 | A kind of method, apparatus of loop detection, terminal device and medium |
| US11050486B2 (en) | 2019-02-14 | 2021-06-29 | Nokia Solutions And Networks Oy | Loop detection in a passive optical LAN network |
| CN113242481A (en) * | 2021-06-29 | 2021-08-10 | 烽火通信科技股份有限公司 | MAC address synchronization method and device of OLT equipment |
| CN114040434A (en) * | 2021-11-12 | 2022-02-11 | 深圳市友华通信技术有限公司 | Loop detection method and device for home gateway |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124184A (en) * | 2005-10-27 | 2007-05-17 | Alaxala Networks Corp | Loop detecting method and loop detection device |
| CN101170462A (en) * | 2007-12-07 | 2008-04-30 | 杭州华三通信技术有限公司 | Downlink loop detection method and device for tree network |
| CN101707538A (en) * | 2009-11-25 | 2010-05-12 | 烽火通信科技股份有限公司 | Method for detecting and automatically recovering Ethernet loopback |
| CN103997368A (en) * | 2013-02-18 | 2014-08-20 | 中兴通讯股份有限公司 | Passive optical network link detection method and apparatus |
-
2014
- 2014-08-26 CN CN201410424655.1A patent/CN104219122A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007124184A (en) * | 2005-10-27 | 2007-05-17 | Alaxala Networks Corp | Loop detecting method and loop detection device |
| CN101170462A (en) * | 2007-12-07 | 2008-04-30 | 杭州华三通信技术有限公司 | Downlink loop detection method and device for tree network |
| CN101707538A (en) * | 2009-11-25 | 2010-05-12 | 烽火通信科技股份有限公司 | Method for detecting and automatically recovering Ethernet loopback |
| CN103997368A (en) * | 2013-02-18 | 2014-08-20 | 中兴通讯股份有限公司 | Passive optical network link detection method and apparatus |
Non-Patent Citations (1)
| Title |
|---|
| 胡昌银: ""EPON 系统中ONU 端口环路检测方案及实现"", 《光通信技术》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016110151A1 (en) * | 2015-01-06 | 2016-07-14 | 烽火通信科技股份有限公司 | Method and device for detecting link loopback of pon system |
| CN104539348B (en) * | 2015-01-06 | 2017-04-12 | 烽火通信科技股份有限公司 | PON system link loopback detection method and device |
| CN104539348A (en) * | 2015-01-06 | 2015-04-22 | 烽火通信科技股份有限公司 | PON system link loopback detection method and device |
| CN105119777B (en) * | 2015-09-07 | 2019-01-25 | 烽火通信科技股份有限公司 | A method of the link loopback detection in PON system |
| CN105119777A (en) * | 2015-09-07 | 2015-12-02 | 烽火通信科技股份有限公司 | Link loopback detection method in passive optical network (PON) system |
| CN105591692A (en) * | 2015-11-04 | 2016-05-18 | 杭州华三通信技术有限公司 | Method and device of loop elimination in Ethernet passive optical network (EPON) |
| CN105553739A (en) * | 2015-12-25 | 2016-05-04 | 瑞斯康达科技发展股份有限公司 | Method and device for tracking MAC addresses |
| CN105553739B (en) * | 2015-12-25 | 2019-04-26 | 瑞斯康达科技发展股份有限公司 | A kind of method and device for realizing MAC Address tracking |
| CN106941634A (en) * | 2017-05-18 | 2017-07-11 | 烽火通信科技股份有限公司 | The method and system of OLT loopback detections in a kind of GPON systems |
| CN108123752A (en) * | 2017-12-29 | 2018-06-05 | 武汉长光科技有限公司 | A kind of EPON accurate loop detection methods based on geography information positioning |
| CN109309604A (en) * | 2018-11-15 | 2019-02-05 | 锐捷网络股份有限公司 | A kind of method, apparatus of loop detection, terminal device and medium |
| US11050486B2 (en) | 2019-02-14 | 2021-06-29 | Nokia Solutions And Networks Oy | Loop detection in a passive optical LAN network |
| CN113242481A (en) * | 2021-06-29 | 2021-08-10 | 烽火通信科技股份有限公司 | MAC address synchronization method and device of OLT equipment |
| CN113242481B (en) * | 2021-06-29 | 2022-04-19 | 烽火通信科技股份有限公司 | MAC address synchronization method and device of OLT equipment |
| CN114040434A (en) * | 2021-11-12 | 2022-02-11 | 深圳市友华通信技术有限公司 | Loop detection method and device for home gateway |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104219122A (en) | Detection method for quickly positioning far-end ONU (optical network unit) loop ports by OLT (optical line terminal) local sides | |
| TWI455501B (en) | Methods and apparatus for extending mac control messages in epon | |
| US7873039B2 (en) | Enhanced optical line terminal controller | |
| TWI351831B (en) | Self-healing ring-based passive optical network sy | |
| CN101873515B (en) | IPV6 message transmission method, system and device of passive optical network | |
| WO2018157291A1 (en) | Method for communication in passive optical network system, optical line terminal and optical network unit | |
| US20030235205A1 (en) | Ethernet passive optical network system | |
| CN104541518A (en) | Method and apparatus of building a coaxial convergence layer in ethernet passive optical network (PON) over coaxial network (EPOC) | |
| KR20060081694A (en) | Method and apparatus for transmission control in an ethernet passive optical network | |
| CN104125518A (en) | Method for realizing data message transmission in transformer substation through passive optical network | |
| CN103840976B (en) | Communication means, light device and the network equipment | |
| US20150036510A1 (en) | Method and device for measuring ethernet performance | |
| WO2011012007A1 (en) | Method and system for quickly updating ranging results of optical network unit by optical line terminal | |
| CN104869028A (en) | Network device and loop detection method | |
| CN101163093A (en) | Method of implementing centralized multicast management on integrated access equipment | |
| CN102271293B (en) | A kind of method and system identifying malice optical network unit | |
| CN105119777A (en) | Link loopback detection method in passive optical network (PON) system | |
| WO2014101185A1 (en) | Method, apparatus and system for detecting performance of multicast channel | |
| US20120163799A1 (en) | Method for Transmitting OAM Message and Processing Error in PON System | |
| TWI474682B (en) | System and method for applying an extended multipoint protocol to wireless access systems | |
| CN105591956B (en) | Flow control methods and equipment based on User-Network Interface UNI | |
| CN105490741A (en) | Method and device for detecting loopback link, optical line terminal, and optical network terminal | |
| US9820022B2 (en) | Managing network access based on ranging information | |
| CN100479406C (en) | Resource distributing method of bus system | |
| WO2011157167A2 (en) | Method and device for transmitting data in passive optical network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141217 |