CN107872738A - A kind of ONU LLID management method, OLT and EPON systems - Google Patents

A kind of ONU LLID management method, OLT and EPON systems Download PDF

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Publication number
CN107872738A
CN107872738A CN201610852542.0A CN201610852542A CN107872738A CN 107872738 A CN107872738 A CN 107872738A CN 201610852542 A CN201610852542 A CN 201610852542A CN 107872738 A CN107872738 A CN 107872738A
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China
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llid
onu
olt
mac address
cryptographic hash
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CN107872738B (en
Inventor
毛宇
闫飞
唐宏
王鹏
张爱华
黄涌梅
高小兵
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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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
    • 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
    • H04Q2011/0079—Operation or maintenance aspects
    • 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
    • H04Q2011/0086—Network resource allocation, dimensioning or optimisation

Abstract

The invention discloses a kind of ONU LLID management method, OLT and EPON system, it is related to communication technical field, method therein includes：OLT receives the registration request of ONU transmissions, and registration request carries ONU MAC Address；OLT is judged in LLID with whether there is LLID corresponding with MAC Address in MAC mapping tables, if so, LLID corresponding with MAC Address then is distributed into ONU；LLID is sent to ONU by OLT.The ONU of present invention LLID management method, OLT and EPON system, the incidence relation between LLID and ONU MAC Address distribute LLID, and the LLID that each ONU is assigned to is relatively fixed；Within digestion period, if ONU reaches the standard grade again, OLT LLID corresponding to sub-distribution again；The LLID caused by ONU failures can be avoided to repeat and upstream data collision problem.

Description

A kind of ONU LLID management method, OLT and EPON systems
Technical field
The present invention relates to technical field of photo communication, more particularly to a kind of ONU LLID management method, OLT and EPON systems System.
Background technology
EPON (Ethernet Passive Optical Network, Ethernet passive optical network) is based on Ethernet PON technologies.It is transmitted using point-to-multipoint structure, passive fiber, and multiple business is provided on Ethernet.EPON system by OLT (Optical Line Terminal, optical line terminal), ODN (Optical Distribution Networ, light distribution Network) and ONU (Optical Network Unit, optical network unit) compositions, ONU points are active optical network unit and passive light NE.
The downlink transfer of EPON system uses broadcast mode, and uplink uses time division multiplexing mode, passes through an optical fiber Access multiple users.OLT is that each ONU distributes unique LLID (15bit), by GATE frames to each LLID distribute up when Gap is scheduled to each user bandwidth, avoids conflicting.Whether OLT is online by keep alive mechanism monitoring ONU, when OLT sentences Break some ONU it is not online when, recovery LLID simultaneously distributes to the new ONU that reaches the standard grade.For example, first ONU distribution 1 succeeded in registration, the Two ONU distribution 2 succeeded in registration, by that analogy, ONUn LLID is assigned as n；When ONUi (LLID=i) ONU is offline, OLT reclaims the LLID；Hereafter, reached the standard grade registration if any ONUn+1, LLID=i can be distributed to ONUn+1 by OLT.
Existing LLID distribution mechanisms are that idle LLID is sequentially assigned to the ONU newly to reach the standard grade from small to large, concentrate on one In less scope.The LLID of the ONU is reclaimed when OLT thinks that ONU a are offline, when a new ONU b reaches the standard grade, by this LLID distributes to the ONU b newly to reach the standard grade；ONU a are not regarded as that oneself is offline in some cases, are distributed in OLT to ONU b During ascending time slot, same time slot can be used to send upstream data, cause uplink service conflict.
The content of the invention
In view of this, the invention solves a technical problem be to provide a kind of ONU LLID management method, OLT And EPON system.
According to an aspect of the present invention, there is provided a kind of ONU LLID management method, including：OLT receives ONU hairs The registration request sent, wherein, the registration request carries the MAC Address of the ONU；The OLT judges to reflect in LLID and MAC Whether with the MAC Address corresponding LLID is had in firing table, if so, then distributing to LLID corresponding with the MAC Address The ONU；The LLID is sent to the ONU by the OLT.
Alternatively, it is when judging in LLID with not LLID corresponding with the MAC Address in MAC mapping tables, then described OLT distributes to the LLID of the ONU based on the MAC Address and according to default rule generation；The OLT is by the MAC LLID of the location with distributing to ONU corresponding relation is write in the LLID and MAC mapping tables.
Alternatively, after the OLT determines that the ONU is offline, judge whether the ONU weighs in default duration threshold value It is new to send registration request, if it is, the LLID is again assigned into the ONU；If it is not, then the OLT LLID with The corresponding relation of the MAC Address and the LLID is deleted in MAC mapping tables.
Alternatively, the OLT distributes to the LLID of the ONU based on the MAC Address and according to default rule generation Including：The OLT calculates the cryptographic Hash of the MAC Address, using the cryptographic Hash as the LLID for distributing to the ONU.
Alternatively, the cryptographic Hash of the OLT calculating MAC Address includes：The MAC Address is entered to a preset value Row complementation, the remainder obtained by complementation are the cryptographic Hash.
Alternatively, it is described the cryptographic Hash is distributed into the ONU as the LLID to include：Based on the LLID with MAC mapping tables judge whether the cryptographic Hash has been used, if it is not, then using the cryptographic Hash as distributing to the ONU's LLID；If it is, by the cryptographic Hash increase by one it is default increment turn into new cryptographic Hash, when it is determined that the new cryptographic Hash not By in use, then using the new cryptographic Hash as the LLID for distributing to the ONU.
Alternatively, the ONU sends REGISTER_REQ frames after the GATE frames that the OLT is sent are received, wherein, The REGISTER_REQ frames include ONU MAC Address；The OLT passes through REGISTER after LLID is distributed to the ONU Frame notifies the LLID to the ONU.
According to another aspect of the present invention, there is provided a kind of optical line terminal OLT, including：Information receiving module, for connecing The registration request that ONU is sent is received, wherein, the registration request carries the MAC Address of the ONU；Distribute module is identified, is used for Judge in LLID with whether there is LLID corresponding with the MAC Address in MAC mapping tables, if so, then will be with the MAC Address Corresponding LLID distributes to the ONU；Sending module is identified, for the LLID to be sent into the ONU.
Alternatively, the mark distribute module, be additionally operable to when judge in LLID and MAC mapping tables not with the MAC Corresponding to address during LLID, then the LLID of the ONU is distributed to based on the MAC Address and according to default rule generation；Will LLID of the MAC Address with distributing to ONU corresponding relation is write in the LLID and MAC mapping tables.
Alternatively, the mark distribute module, is additionally operable to after it is determined that the ONU is offline, judges in default duration threshold Whether the ONU resends registration request in value, if it is, the LLID is again assigned into the ONU；If not, The corresponding relation of the MAC Address and the LLID is then deleted in LLID and MAC mapping tables.
Alternatively, the mark distribute module, it is additionally operable to calculate the cryptographic Hash of the MAC Address, the cryptographic Hash is made To distribute to the LLID of the ONU.
Alternatively, the mark distribute module, it is additionally operable to the MAC Address carrying out complementation to a preset value, The remainder obtained by complementation is the cryptographic Hash.
Alternatively, the mark distribute module, it is additionally operable to judge that the cryptographic Hash is based on the LLID and MAC mapping tables It is no to have been used, if it is not, then using the cryptographic Hash as the LLID for distributing to the ONU；If it is, by the cryptographic Hash The default increment of increase by one turns into new cryptographic Hash, when it is determined that the new cryptographic Hash is not used by, then by the new cryptographic Hash As the LLID for distributing to the ONU.
Alternatively, the ONU sends REGISTER_REQ frames after the GATE frames that the OLT is sent are received, wherein, The REGISTER_REQ frames include ONU MAC Address；The mark sending module, for after LLID is distributed to ONU, leading to REGISTER frames are crossed to notify the LLID to the ONU.
According to another aspect of the invention, there is provided a kind of Ethernet passive optical network EPON system, including it is as described above OLT。
The ONU of present invention LLID management method, OLT and EPON system, is established between LLID and ONU MAC Address Incidence relation, distribute LLID based on incidence relation, the LLID that each ONU is assigned to is relatively fixed；When ONU is offline, passing through Can just the incidence relation between LLID and ONU MAC Address be deleted by crossing after a longer ageing time, in digestion period It is interior, if ONU reaches the standard grade again, OLT LLID corresponding to sub-distribution again；Hash algorithm can be used to calculate ONU MAC Address to draw Corresponding LLID values, the small LLID of numerical value will not be reused frequently, and the LLID caused by ONU failures can be avoided repeatedly and up Data collision problem.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only Some embodiments of the present invention, for those of ordinary skill in the art, without having to pay creative labor, also Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet according to one embodiment of the ONU of present invention LLID management method；
Fig. 2 is that the flow that ONU is registered in one embodiment according to the ONU of present invention LLID management method is illustrated Figure；
Fig. 3 is the module diagram according to the OLT of present invention one embodiment.
Embodiment
The present invention is described more fully with reference to the accompanying drawings, wherein illustrating the exemplary embodiment of the present invention.Under The accompanying drawing that face will be combined in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of protection of the invention.Many retouch is carried out to technical scheme with reference to each figure and embodiment State.
Fig. 1 is according to the schematic flow sheet of one embodiment of the ONU of present invention LLID management method, such as Fig. 1 institutes Show：
Step 101, OLT receives the registration request of ONU transmissions, wherein, registration request carries ONU MAC Address.
Step 102, OLT is judged in LLID with whether there is LLID corresponding with MAC Address in MAC mapping tables, if so, then LLID corresponding with MAC Address is distributed into ONU.For example, established on OLT and safeguard a LLID and MAC mapping tables, it is as follows Shown in table 1：
LLID ONU MAC ONU states Remaining ageing time
1 3C970E1D51D8 Online 30 days
15 4D860A2234B3 Offline 10 days
Table 1-LLID and MAC mapping tables
Step 103, LLID is sent to ONU by OLT.
When judging in LLID with not LLID corresponding with MAC Address in MAC mapping tables, then OLT be based on MAC Address, And ONU LLID is distributed to according to default rule generation.Default rule can have it is a variety of, such as by MAC Address generate breathe out Uncommon value etc..OLT writes MAC Address and the LLID for distributing to ONU corresponding relation in LLID and MAC mapping tables.
The LLID of ONU in above-described embodiment management method, establish associating between LLID and ONU MAC Address System, LLID is distributed based on incidence relation, LLID will not reuse frequently, can avoid the LLID caused by ONU failures repeat and Upstream data collision problem.
MAC (Media Access Control) address is Media Access Control address, in osi model, second number of plies Then it is responsible for MAC Address according to link layer.At least one MAC Address of ONU, length is 48 bits (6 byte), by the numeral of 16 systems Composition, first 24 are called tissue unique identifier (Organizationally Unique Identifier, i.e. OUI), be by The code that IEEE registration management mechanism distributes to different manufacturers, has distinguished different producers；24 are by producer oneself point afterwards Match somebody with somebody, referred to as extended identifier.
After OLT determines that ONU is offline, judge whether ONU resends registration request in default duration threshold value, if It is that LLID is then again assigned to ONU with LLID corresponding with ONU MAC in MAC mapping tables.If it is not, then OLT is in LLID With deleting MAC address and LLID corresponding relation in MAC mapping tables.Duration threshold value can be 20 days, 30 days, 40 days etc..
After OLT receives the REGISTER_REQ frames of new registration ONU transmissions, ONU MAC Address is got.OLT searches LLID With MAC mapping tables, if the MAC Address of the ONU distributes to corresponding LLID in table in LLID and MAC mapping tables ONU.If the MAC Address of the ONU not in LLID and MAC mapping tables, distributes a LLID equally not in list, and ONU MAC Address and LLID are write into list.
After some ONU is offline, LLID corresponding to withdrawal distributes to other ONU to OLT at once, but starts aging meter When, the ONU does not reach the standard grade registration again after a digestion period, then from LLID and MAC mapping tables deleting MAC address and LLID.Because LLID scope is much larger than the ONU quantity of PON system lower band, therefore suggest digestion period setting one longer Time.
In one embodiment, OLT based on MAC Address and according to default rule generation distribute to ONU LLID have it is more Kind, for example, OLT calculates the cryptographic Hash of MAC Address, using cryptographic Hash as the LLID for distributing to ONU.Hash tables be referred to as hash table or Hash table, Hash tables are a kind of special data structures, it can fast positioning to the record wanted to look up, can have a variety of sides Method generates cryptographic Hash, for example, immediately allocating method, middle square method, jackknife method, except leaving and taking remaining method etc..LLID and MAC mapping tables are deposited The cryptographic Hash of MAC Address and MCA addresses is put, that is, the LLID distributed corresponding relation.
The cryptographic Hash that OLT calculates MAC Address can be used except remaining method is left and taken, and MAC Address is taken to a preset value Remaining computing, the remainder obtained by complementation are cryptographic Hash.Whether OLT be based on LLID and judge cryptographic Hash with MAC mapping tables Used, if cryptographic Hash is not used by, ONU is distributed to using cryptographic Hash as LLID.If cryptographic Hash has been used, Cryptographic Hash is increased into a default increment turns into new cryptographic Hash, when it is determined that newly cryptographic Hash is not in LLID and MAC mapping tables When, then this new cryptographic Hash distributes to ONU as LLID, and default increment can be positive and negative 1,2 etc..
Preset value can be configured according to specific network, can set multiple preset values, the value of each preset value Scope is 0-65535.For example, LLID=Hash (ONU_MAC_Address), wherein hash algorithm input are that length is 48bit Binary code, output result be 15bit binary code.
Fig. 2 is that the flow that ONU is registered in one embodiment according to the ONU of present invention LLID management method is illustrated Figure, as shown in Figure 2：
Step 201, OLT broadcasts GATE frames and notifies the unregistered ONU windowing times.
Step 202, unregistered ONU sends REGISTER_REQ frames, wherein the MAC Address comprising ONU.
Step 203, OLT distributes LLID to ONU, and notifies the ONU, ONU to confirm by REGISTER frames.
ONU sends REGISTER_REQ frames after the GATE frames of OLT transmissions are received, and REGISTER_REQ frames include ONU MAC Address.OLT is notified LLID to ONU by REGISTER frames after LLID is distributed to ONU.
The LLID of ONU in above-described embodiment management method, establish associating between LLID and ONU MAC Address System, LLID is distributed based on incidence relation；When ONU is offline, just can be by LLID and ONU after a longer ageing time MAC Address between incidence relation delete, within digestion period, if ONU reaches the standard grade again, OLT is again corresponding to sub-distribution LLID；Hash algorithm can be used to calculate ONU MAC Address and draw corresponding LLID values, can be avoided caused by ONU failures LLID is repeated and upstream data collision problem.
According to another aspect of the present invention, as shown in Figure 3, there is provided a kind of optical line terminal OLT 30, including：Information connects Receive module 31, mark distribute module 32 and mark sending module 33.Information receiving module 31 receives the registration request that ONU is sent, Wherein, registration request carries ONU MAC Address.Mark distribute module 32 judge whether to have in LLID and MAC mapping tables with LLID corresponding to MAC Address, if so, LLID corresponding with MAC Address then is distributed into ONU.Identifying sending module 33 will LLID is sent to ONU.
When judging in LLID with not LLID corresponding with MAC Address in MAC mapping tables, then the base of distribute module 32 is identified ONU LLID is distributed in MAC Address and according to default rule generation.Distribute module 32 is identified by MAC Address with distributing to In ONU LLID corresponding relation write-in LLID and MAC mapping tables.
Distribute module 32 is identified after it is determined that ONU is offline, judges whether ONU resends note in default duration threshold value Volume request, if it is, LLID is again assigned to ONU by mark distribute module 32；If it is not, then in LLID and MAC mapping tables The corresponding relation of middle deleting MAC address and LLID.
The cryptographic Hash that distribute module 32 calculates MAC Address is identified, using cryptographic Hash as the LLID for distributing to ONU.Mark point MAC Address is subjected to complementation to a preset value with module 32, the remainder obtained by complementation is cryptographic Hash.Mark Distribute module 33 judges whether cryptographic Hash has been used based on LLID and MAC mapping tables, if it is not, then using cryptographic Hash as distribution LLID to ONU；If it is, cryptographic Hash is increased a default increment by mark distribute module 33 turns into new cryptographic Hash, when It is determined that when new cryptographic Hash is not used by, then using new cryptographic Hash as the LLID for distributing to ONU.ONU is receiving OLT transmissions After GATE frames, REGISTER_REQ frames are sent, REGISTER_REQ frames include ONU MAC Address.Identify sending module 33 to After ONU distribution LLID, LLID is notified to ONU by REGISTER frames.
In one embodiment, the present invention provides a kind of Ethernet passive optical network EPON system, including OLT as above.
The LLID of ONU in above-described embodiment management method, OLT and EPON system, with establishing LLID and ONU MAC Incidence relation between location, LLID is distributed based on incidence relation；When ONU is offline, after a longer ageing time The incidence relation between LLID and ONU MAC Address can just be deleted, within digestion period, if ONU reaches the standard grade again, OLT is again LLID corresponding to sub-distribution；LLID values corresponding to being drawn using hash algorithm calculating ONU MAC Address, LLID are more uniform Be distributed in 0-65535 sections, the small LLID of numerical value will not be reused frequently, can avoid the LLID caused by ONU failures Repeat and upstream data collision problem.
The method and system of the present invention may be achieved in many ways.For example, can by software, hardware, firmware or Software, hardware, firmware any combinations come realize the present invention method and system.The said sequence of the step of for method is only Order described in detail above is not limited in order to illustrate, the step of method of the invention, is especially said unless otherwise It is bright.In addition, in certain embodiments, the present invention can be also embodied as recording program in the recording medium, these programs include For realizing the machine readable instructions of the method according to the invention.Thus, the present invention also covering storage is used to perform according to this hair The recording medium of the program of bright method.
Description of the invention provides for the sake of example and description, and is not exhaustively or by the present invention It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Select and retouch State embodiment and be to more preferably illustrate the principle and practical application of the present invention, and one of ordinary skill in the art is managed The present invention is solved so as to design the various embodiments with various modifications suitable for special-purpose.

Claims (15)

  1. A kind of 1. LLID LLID of optical network unit ONU management method, it is characterised in that including：
    Optical line terminal OLT receives the registration request of ONU transmissions, wherein, the registration request carries the MAC of the ONU Address；
    The OLT judged in LLID with whether there is LLID corresponding with the MAC Address in MAC mapping tables, if so, then will be with LLID corresponding to the MAC Address distributes to the ONU；
    The LLID is sent to the ONU by the OLT.
  2. 2. the method as described in claim 1, it is characterised in that also include：
    When judging in LLID with not LLID corresponding with the MAC Address in MAC mapping tables, then the OLT is based on described MAC Address and the LLID that the ONU is distributed to according to default rule generation；
    The MAC Address and the LLID for distributing to the ONU corresponding relation are write the LLID and MAC and mapped by the OLT In table.
  3. 3. method as claimed in claim 2, it is characterised in that also include：
    After the OLT determines that the ONU is offline, judge whether the ONU resends registration in default duration threshold value Request, if it is, the LLID is again assigned into the ONU；
    If it is not, then the OLT deletes the corresponding relation of the MAC Address and the LLID in LLID and MAC mapping tables.
  4. 4. method as claimed in claim 2, it is characterised in that the OLT is based on the MAC Address and according to default rule Then generation is distributed to the LLID of the ONU and included：
    The OLT calculates the cryptographic Hash of the MAC Address, using the cryptographic Hash as the LLID for distributing to the ONU.
  5. 5. method as claimed in claim 4, it is characterised in that the cryptographic Hash that the OLT calculates the MAC Address includes：
    The MAC Address is subjected to complementation to a preset value, the remainder obtained by complementation is the cryptographic Hash.
  6. 6. method as claimed in claim 4, it is characterised in that it is described distributed to using the cryptographic Hash as the LLID it is described ONU includes：
    Judge whether the cryptographic Hash has been used based on the LLID and MAC mapping tables, if it is not, then the cryptographic Hash is made To distribute to the LLID of the ONU；
    If it is, by the cryptographic Hash increase by one it is default increment turn into new cryptographic Hash, when it is determined that the new cryptographic Hash not By in use, then using the new cryptographic Hash as the LLID for distributing to the ONU.
  7. 7. the method as described in claim 1, it is characterised in that also include：
    The ONU sends REGISTER_REQ frames after the GATE frames that the OLT is sent are received, wherein, it is described REGISTER_REQ frames include ONU MAC Address；
    The OLT is notified the LLID to the ONU by REGISTER frames after LLID is distributed to the ONU.
  8. A kind of 8. optical line terminal OLT, it is characterised in that including：
    Information receiving module, for receiving the registration request of ONU transmissions, wherein, the registration request carries the ONU's MAC Address；
    Distribute module is identified, for judging in LLID with whether there is LLID corresponding with the MAC Address in MAC mapping tables, such as Fruit has, then LLID corresponding with the MAC Address is distributed into the ONU；
    Sending module is identified, for the LLID to be sent into the ONU.
  9. 9. OLT as claimed in claim 8, it is characterised in that
    The mark distribute module, it is additionally operable to not corresponding with the MAC Address with MAC mapping tables in LLID when judging During LLID, then the LLID of the ONU is distributed to based on the MAC Address and according to default rule generation；By the MAC LLID of the location with distributing to ONU corresponding relation is write in the LLID and MAC mapping tables.
  10. 10. OLT as claimed in claim 9, it is characterised in that
    The mark distribute module, is additionally operable to after it is determined that the ONU is offline, judges the ONU in default duration threshold value Whether registration request is resend, if it is, the LLID is again assigned into the ONU；If it is not, then LLID with The corresponding relation of the MAC Address and the LLID is deleted in MAC mapping tables.
  11. 11. OLT as claimed in claim 10, it is characterised in that
    The mark distribute module, it is additionally operable to calculate the cryptographic Hash of the MAC Address, the cryptographic Hash is described as distributing to ONU LLID.
  12. 12. OLT as claimed in claim 11, it is characterised in that
    The mark distribute module, it is additionally operable to the MAC Address carrying out complementation to a preset value, passes through complementation Obtained remainder is the cryptographic Hash.
  13. 13. OLT as claimed in claim 11, it is characterised in that
    The mark distribute module, it is additionally operable to judge whether the cryptographic Hash has been used based on the LLID and MAC mapping tables, If it is not, then using the cryptographic Hash as the LLID for distributing to the ONU；If it is, the cryptographic Hash is increased by one in advance If increment turn into new cryptographic Hash, when it is determined that the new cryptographic Hash is not used by, then using the new cryptographic Hash as distributing to The LLID of the ONU.
  14. 14. OLT as claimed in claim 11, it is characterised in that the ONU after the GATE frames that the OLT is sent are received, REGISTER_REQ frames are sent, wherein, it is described
    REGISTER_REQ frames include ONU MAC Address；
    The mark sending module, for after LLID is distributed to ONU, being notified the LLID to described by REGISTER frames ONU。
  15. A kind of 15. Ethernet passive optical network EPON system, it is characterised in that：
    Including the OLT as described in any one of claim 8 to 14.
CN201610852542.0A 2016-09-26 2016-09-26 Management method of LLID of ONU, OLT and EPON system Active CN107872738B (en)

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