CN104378303B - Method and system, ONU and the OLT of forwarding multicasting business - Google Patents
Method and system, ONU and the OLT of forwarding multicasting business Download PDFInfo
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- CN104378303B CN104378303B CN201410677517.4A CN201410677517A CN104378303B CN 104378303 B CN104378303 B CN 104378303B CN 201410677517 A CN201410677517 A CN 201410677517A CN 104378303 B CN104378303 B CN 104378303B
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Abstract
The present invention proposes a kind of method and system, optical network unit and the optical line terminal of forwarding multicasting business, including：The ONU decapsulates to the first multicast service message from optical line terminal OLT, according to the LLID LLID of its preamble information and the first multicast service forwarding mark for receiving the first multicast service whether is allowed to be judged, if allow to receive, the first multicast service message is then sent to user, otherwise, the first multicast service message is abandoned.Present invention alleviates the processing load of ONU user.
Description
Technical field
The present invention relates to ethernet passive optical network (EPON, Ethernet Passive Optical Network) technology,
Espespecially a kind of method and system, optical network unit ONU and the optical line terminal OLT of forwarding multicasting business.
Background technology
Fig. 1 (a) is that EPON uses point-to-multipoint networking structure schematic diagram.As shown in Fig. 1 (a), data are on single fiber
Transmitted in both directions is carried out, up direction is (i.e. from optical network unit (ONU, Optical Network Unit) to optical line terminal
(OLT, Optical Line Terminal) is transmitted) using time division multiplexing (TDM, Time-Division Multiplexing)
Transmission means, down direction (i.e. from OLT to ONU transmit) uses broadcast transmission.
Fig. 1 (b) internal cascade schematic diagrams between OLT and ONU.As shown in Fig. 1 (b), each ONU includes user
With passive optical-fiber network (PON, Passive Optical Network) chip, OLT also includes user and PON chips.It is existing
The method of forwarding multicasting business is：
ONU receives report (report) message from user, and report messages include user's on-demand multicasting business
Multicast internet protocol (IP, Internet Protocol) address；ONU is carried out to the multicast ip address in report messages
Study, multicast medium access control (MAC, Media Access Control) addresses forwarding table is generated, report messages are sent out
Give ONU PON chips；
Report messages are encapsulated preamble information by ONU PON chips；Wherein, preamble information includes logic chain road sign
Know starting delimiter (SLD, Start of LLID (LLID, Logical Link Identifier) Delimiter), logic chain
Line LLID (ONU itself LLID) and CRC (CRC, Cyclic Redundancy Check), in addition to
2 bytes that 2 bytes and SLD that SLD above retains retain below；ONU PON chips lead to the report messages after encapsulation
Cross the PON chips that optical splitter is sent to OLT；
After OLT PON chips remove the preamble information of report messages, report messages are transmitted to OLT and exchange core
Piece；After OLT exchange chips learn to the multicast ip address in report messages, report messages are sent to multicast services
Device；
After multicast server receives report messages, by group business stream corresponding to the multicast ip address in report messages
It is sent to OLT；
Multicast media access control (MAC, Media AccessControl) address that OLT user's detection learns before
It whether there is forwarding-table item corresponding to group business stream in forward table, group business stream abandoned if being not present；If the general in the presence of if
Group business stream is forwarded to OLT PON chips；
Group business stream is encapsulated preamble information by OLT PON chips, and wherein LLID is packaged into 0X7FFF, and will encapsulation
All ONU under group business stream flood model afterwards to PON interfaces；Fig. 2 is the multicast service message of the group business stream after encapsulation
Frame structure schematic diagram, wherein, SPD is SFD, and DA is purpose MAC Address, and SA is source MAC, length/
Type is protocol type field, and data field is the efficient message that user sends, and FCS is Frame Check Sequence；
ONU PON chips detect that the LLID of group business stream is 0X7FFF, and group business stream is transmitted to ONU friendship
Change chip；With the presence or absence of corresponding to group business stream in the multicast mac address forward table that ONU exchange chip detection learns before
Forwarding-table item, if abandoning group business stream in the absence of if, group business stream is forwarded to end user if existing.
From above-mentioned flow, it will be seen that when OLT has multicast service to issue, if some ONU on-demand multicasting
Program, all ONU under the same PON interfaces of OLT can receive group business stream, and ONU PON chips directly turn the data
ONU exchange chip is issued, ONU exchange chip judges whether group business stream forwards according to multicast mac address table, this
Sample has just aggravated the processing load of ONU exchange chip, and the limited of exchange chip for wasting ONU PON chip sums turns
Hair band is wide, in the case where network traffics are larger, can cause data congestion, cause user data loss.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of method and system, the optical network unit of forwarding multicasting business
And optical line terminal, the processing load of ONU user can be mitigated.
In order to achieve the above object, the present invention proposes a kind of method of forwarding multicasting business, applied to being arranged on user
Optical network unit ONU between optical line terminal OLT, this method include：
ONU decapsulates to the first multicast service message from optical line terminal OLT, according to its preamble information
LLID LLID and whether allow receive the first multicast service the first multicast service forwarding mark judged, if permit
Perhaps receive, then the first multicast service message is sent to user, otherwise, abandon the first multicast service message.
Preferably, also include before this method：
ONU after the second multicast service message encapsulation preamble information from user to being sent to OLT, and preamble information is extremely
Whether the LLID including ONU and instruction ONU ask the second multicast service of multicast service to forward mark less.
Preferably, the second multicast service forwarding mark is uniquely corresponding with each ONU under OLT.
Preferably, positioned really with ONU only in the binary coding of the setting length in the first multicast service forwarding mark
One correspondence.
Preferably, the whole binary coding of the setting length in the first multicast service forwarding mark is uniquely corresponding with ONU.
Preferably, when the second multicast service message from user is reports report messages, ONU is to report messages
Also include before encapsulation preamble information：
ONU learns to the multicast internet protocol IP address in report messages, generates multicast medium access control
Mac address forwarding table；
Report messages encapsulation preamble information from user is included,
ONU LLID is saved in the LLID of preamble information, and ONU the second multicast service forwarding mark is indicated
To ask multicast service.
Preferably, when the multicast service message from user for when leaving message, ONU is to leaving message encapsulation lead code letter
Also include before breath：
List item corresponding to the multicast ip address in message is left in deletion multicast mac address forward table；
Message encapsulation preamble information of leaving from user is included：
ONU LLID is saved in the LLID of preamble information, and ONU the second multicast service forwarding mark is indicated
Not ask multicast service.
Preferably, it is query message that ONU, which receives the first multicast service message from OLT,.
The invention also provides a kind of method of forwarding multicasting business, applied to multicast server and optical network unit ONU
Between optical line terminal OLT, this method includes：
OLT receive the second multicast service message from ONU, in the multicast service forward table pre-set search less than
List item corresponding to multicast internet protocol IP address in the second multicast service message from ONU, according to second from ONU
List item corresponding to multicast ip address and preamble information generation in multicast service message；Remove the second multicast industry from ONU
It is engaged in after the preamble information of message, the multicast ip address in the second multicast service message from ONU is learnt, generation group
Medium access control mac address forwarding table is broadcast, the second multicast service message from ONU is sent to multicast server；Receive
It is leading to the first multicast service message encapsulation from multicast server to the first multicast service message from multicast server
Code information, and the first multicast service message from multicast server after encapsulation is sent under PON interfaces corresponding to ONU
All ONU；
Or the multicast ip address in the first multicast service message from multicast server forwards in multicast service
First multicast service forwarding mark corresponding to being searched in table, by the first multicast service message from multicast server replicate
(N-1) part；Wherein, N is the number of the first multicast service forwarding mark found；To the first multicast service message of each duplication
Encapsulate preamble information, the institute the first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU
There is ONU.
Preferably, the multicast service message encapsulation preamble information of each duplication is included：
Multicast service forwarding mark in the preamble information of N parts the first multicast service message is set to N number of lookup respectively
The the first multicast service forwarding mark arrived.
Preferably, when the multicast in the second multicast service message that OLT finds from ONU in multicast service forward table
Corresponding to internet protocol address during list item, this method also includes：
The second multicast service forwarding mark is saved in multicast service and turned corresponding to the ONU that the second multicast service message will be sent
In delivering；
Or delete the ONU of transmission the second multicast service message in the list item found, and by multicast MAC table
Deleted from list item corresponding to the multicast ip address in ONU the second multicast service message, by the second multicast service report from ONU
Text is sent to multicast server.
Preferably, the first multicast service message encapsulation preamble information from multicast server is included：
Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server,
List item corresponding to multicast ip address is searched in first multicast service forward table, by first corresponding to the ONU in the list item found
Multicast service forwarding mark is set to the ONU request multicast services in the list item for representing to find.
Preferably, the first multicast service message from multicast server is general query message or group-specific query report
Text, or the protocol massages of broadcasting packet or multicast frame structure；OLT before packaging preamble information when, by preamble information
One multicast service forwarding mark, which is set to, represents that all ONU ask multicast service under PON interfaces corresponding to ONU.
The invention also provides a kind of optical network unit, comprise at least：
Package module, for being decapsulated to the first multicast service message from optical line terminal OLT；
Judge module, for the LLID LLID according to its preamble information and whether allow to receive the first multicast
The first multicast service forwarding mark of business is judged, if allowing to receive, the first multicast service message is sent into user,
Otherwise, the first multicast service message is abandoned.
Preferably, package module is additionally operable to：
To being sent to OLT after the second multicast service message encapsulation preamble information from user, preamble information is at least
Whether LLID and instruction ONU including ONU ask the second multicast service of multicast service to forward mark.
Preferably, the multicast service message from user is report report messages；
Optical network unit also includes：
Generation module, for learning to the multicast internet protocol IP address in report messages, generation multicast is situated between
Matter access control MAC addresses forward table；
Package module specifically includes the second multicast service message encapsulation preamble information from user：
The LLID of itself is saved in the LLID of preamble information, and multicast service forwarding mark is set to expression itself
Ask multicast service.
Preferably, the multicast service message from user is to leave message；
Optical network unit, in addition to：
Removing module, list item corresponding to multicast ip address in message is left in multicast mac address forward table for deleting；
Package module specifically includes the second multicast service message encapsulation preamble information from user：
The LLID of itself is saved in the LLID of preamble information, and multicast service forwarding mark is set to expression itself
Multicast service is not asked.
The invention also provides a kind of optical line terminal, comprise at least：
Searching modul, for receiving the second multicast service message from optical network unit ONU, in the multicast pre-set
Searched in business forward table less than table corresponding to the multicast internet protocol IP address in the second multicast service message from ONU
, according to list item corresponding to the generation of the preamble information of the second multicast service message from ONU；Remove second from ONU
After the preamble information of multicast service message, the second multicast service message from ONU is transmitted to multicast server；
Package module, for encapsulating preamble information to the first multicast service message from multicast server, and will envelope
The first multicast service message from multicast server after dress is sent to all ONU under PON interfaces corresponding to ONU；Or
Multicast ip address in the first multicast service message from multicast server is searched corresponding in multicast service forward table
The first multicast service forwarding mark, by from multicast server the first multicast service message replicate (N-1) part；Wherein, N is
The number of the first multicast service forwarding mark found；Preamble information is encapsulated to the first multicast service message of each duplication,
All ONU first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU；
Generation module, for learning to the multicast ip address in the second multicast service message from ONU, generation group
Medium access control mac address forwarding table is broadcast, the second multicast service message from ONU is sent to multicast server.
Preferably, searching modul is additionally operable to：
The multicast internet protocol IP in the second multicast service message from ONU is found in multicast service forward table
List item corresponding to address, the second multicast service forwarding mark is saved in multicast industry corresponding to the ONU that will send multicast service message
In forward table of being engaged in；
Or delete the ONU of transmission the second multicast service message in the list item found, and by multicast MAC table
Deleted from list item corresponding to the multicast ip address in ONU the second multicast service message, by the second multicast service report from ONU
Text is sent to multicast server.
Preferably, package module is specifically used the first multicast service message encapsulation preamble information from multicast server
In：
Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server,
List item corresponding to multicast ip address is searched in multicast service forward table, by the first multicast corresponding to the ONU in the list item found
Business forwarding is identified as the ONU request multicast services in the list item for representing to find.
The invention also provides a kind of system of forwarding multicasting service message, comprise at least：
Optical network unit ONU, for being decapsulated to the first multicast service message from optical line terminal OLT, root
According to its preamble information LLID LLID and whether allow receive the first multicast service the first multicast service forward
Mark is judged, if allowing to receive, the first multicast service message is sent into user, otherwise, abandons this first group
Broadcast service message；
Optical line terminal OLT, for sending the first multicast service message to ONU.
Preferably, the ONU is additionally operable to：
To being sent to the OLT, the lead code after the second multicast service message encapsulation preamble information from user
Whether information asks the second multicast service of multicast service to forward mark including at least the LLID and the instruction ONU of the ONU；
The OLT is additionally operable to：
The second multicast service message from ONU is received, searches in the multicast service forward table pre-set and does not arrive
From list item corresponding to the multicast internet protocol IP address in ONU the second multicast service message, according to second group from ONU
Broadcast list item corresponding to multicast ip address and the preamble information generation in service message；Remove the second multicast service from ONU
After the preamble information of message, the multicast ip address in the second multicast service message from ONU is learnt, generates multicast
Medium access control mac address forwarding table, the second multicast service message from ONU is sent to multicast server；Receive
The first multicast service message from multicast server, lead code is encapsulated to the first multicast service message from multicast server
Information, and the first multicast service message from multicast server after encapsulation is sent under PON interfaces corresponding to the ONU
All ONU；
Or the multicast ip address in the first multicast service message from multicast server is in the multicast service
In forward table search corresponding to the first multicast service forwarding mark, by the first multicast service message from multicast server answer
Make (N-1) part；Wherein, N is the number of the first multicast service forwarding mark found；To the first multicast service report of each duplication
Text encapsulation preamble information, the first multicast service message of each duplication after encapsulation is sent under PON interfaces corresponding to ONU
All ONU.
Preferably, the OLT is additionally operable to：
The multicast internet association in the second multicast service message from ONU is found in multicast service forward table
List item corresponding to discussing IP address, the second multicast service forwarding mark corresponding to the ONU of the second multicast service message will be sent
It is saved in multicast service forward table；
Or delete the ONU of transmission the second multicast service message in the list item found, and by multicast MAC table
Described in list item corresponding to multicast ip address in the second multicast service message from ONU delete, by it is described from ONU the
Two multicast service messages are sent to the multicast server.
Compared with prior art, the present invention is extended to forward as multicast service to lead code and identified.Pass through the present invention
Scheme, ONU PON chips when receiving the first multicast service message, according to the lead code of the first multicast service message believe
The multicast service forwarding mark of breath judges whether the first multicast service message of reception, and the exchange chip without ONU enters to advance
One step judges, so as to alleviate the processing load of ONU user.
Brief description of the drawings
The accompanying drawing in the embodiment of the present invention is illustrated below, the accompanying drawing in embodiment is for entering one to the present invention
Step understands, is used to explain the present invention together with specification, does not form limiting the scope of the invention.
Fig. 1 (a) is that EPON uses point-to-multipoint networking structure schematic diagram；
Fig. 1 (b) internal cascade schematic diagrams between OLT and ONU；
Fig. 2 is existing multicast service message structure schematic diagram；
Fig. 3 is the method flow diagram of the forwarding multicasting business applied to ONU of the present invention；
Fig. 4 is the multicast service message structure schematic diagram of the present invention；
Fig. 5 is the method flow diagram of the forwarding multicasting business applied to OLT of the present invention；
Fig. 6 is the ONU of present invention structure composition schematic diagram；
Fig. 7 is the OLT of present invention structure composition schematic diagram.
Embodiment
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not
It can be used for limiting the scope of the invention.
Referring to Fig. 3, the present invention proposes a kind of method of forwarding multicasting business, and applied to ONU, this method is in multicast service
(being such as extended after SLD) is set to be used to identify whether ONU asks the multicast industry of multicast service in the preamble information of message
Business forwarding mark.
Multicast service message refers to the packet to be communicated between ONU and OLT or message etc., such as report messages,
Or general query message or group-specific query message, group business stream etc..
This method includes：
Step 300, ONU decapsulate to the first multicast service message from optical line terminal OLT, leading according to its
The LLID LLID of code information and the first multicast service forwarding mark progress for whether allowing the first multicast service of reception
Judge, if allowing to receive, the first multicast service message is sent to user, otherwise, abandons the first multicast service message.
In this step, to the first multicast service report when the first multicast service forwarding mark can be OLT responses ONU request
The mark or OLT of text encapsulation force the mark of the first multicast service message encapsulation sent.
In this step, the first multicast service forwarding mark in setting length binary coding in really position and ONU
It is unique corresponding；Or first multicast service forwarding mark in setting length whole binary coding it is uniquely corresponding with ONU.
In this step, the first multicast service message from OLT can be group business stream or general query message or
Group-specific query message.
In this step, according to the LLID and the first multicast industry of the preamble information of the first multicast service message from OLT
Business forwarding mark judges that requesting itself multicast service includes：Judge the lead code of the first multicast service message from OLT
The LLID of information is to represent multicast service (such as 0X7FFF), and the preamble information of the first multicast service message from OLT
The forwarding of first multicast service, which is identified as, represents that (the first multicast service forwards requesting itself multicast service as corresponding to the LLID of itself
Mark N positions for 1 or first multicast service forwarding mark be set to the LLID values of itself corresponding to binary number it is equal, or
First multicast service forwarding be identified as it is complete 1), the first multicast service message from OLT is sent to user.
In this step, as the LLID and the first multicast of the preamble information according to the first multicast service message from OLT
When business forwarding mark judges that itself does not ask multicast service, the first group business stream is abandoned.
Wherein, turned according to the LLID of the preamble information of the first multicast service message from OLT and the first multicast service
Issue of bidding documents is known and judges that itself does not ask multicast service to include：
The LLID of the preamble information of the first multicast service message from OLT is judged to represent multicast service, and it is preceding
The first multicast service forwarding of preamble information, which is identified as expression, itself does not ask multicast service.(as corresponding to the LLID of itself
The N positions of one multicast service forwarding mark forward ident value binary number corresponding with the LLID values of itself for 0 or multicast service
It is unequal).
In this step, when ONU receives general query message or group-specific query message from OLT, to inquiry
Message is decapsulated, and judges that the LLID of the preamble information of the query message after decapsulation represents multicast service, and second group
Broadcast business forwarding be identified as represent ONU corresponding to PON interfaces at least one ONU receiving multicast business when, by the multicast service
Message is sent to user.
Also include before this method：
Step 301, ONU after the second multicast service message encapsulation preamble information from user to being sent to OLT.
In this step, whether preamble information asks second group of multicast service including at least ONU LLID and instruction ONU
Broadcast business forwarding mark.
In this step, the second multicast service forwarding mark is uniquely corresponding with each ONU under OLT.
In this step, the multicast service message from user can be report report messages；Report messages are ONU
User receives the report messages from user, to multicast internet protocol (IP, the Internet in report messages
Protocol) address is learnt, and after generating mac address forwarding table, is sent to ONU PON chips.
Multicast service message encapsulation preamble information from user is included：The LLID of itself is saved in lead code letter
In the LLID of breath, and ONU the second multicast service forwarding mark is set to and represents requesting itself multicast service.
Wherein, report messages include the multicast ip address of user's program request.
Wherein, ONU user can be learnt using prior art to report messages, be not intended to limit the present invention
Protection domain.
Wherein, ONU the second multicast service forwarding mark is set to and represents that requesting itself multicast service includes：
The n-th position by the second multicast service forwarding mark corresponding to the LLID of itself is expression requesting itself multicast industry
Business；Or by the second multicast service forwarding mark be set to the LLID of itself corresponding to binary number it is equal, n is LLID pairs of ONU
The binary number answered.
In this step, as shown in figure 4, preamble information comprises at least the second multicast service forwarding mark and LLID, also wrap
Include 2 bytes and the CRC that SLD, SLD above retain.
Wherein, each corresponding ONU of the second multicast service forwarding mark, for identifying whether ONU asks multicast
Business.For example, when the position takes 0, represent that the ONU does not ask multicast service；When the position takes 1, represent that the ONU asks multicast
Business.
Second multicast service forwarding mark digit more than or equal to OLT a PON interface for ONU number.Example
Such as, in existing EPON, an OLT PON interface generally corresponds to 128 ONU, it is therefore preferred that 16 bytes can be used
(totally 128) represent multicast service forwarding mark, 1 byte that one of byte retains for before before LLID.
Or second multicast service forwarding mark identify whether ONU asks multicast service using binary mode, i.e., the
Two multicast service identifiers and binary number corresponding to ONU LLID are uniquely corresponding.For example, when an OLT PON interface is corresponding
During 128 ONU, 128 ONU can be identified using 2 bytes (totally 16), when the forwarding of the second multicast service is identified as
When 0000000000000001, represent that the ONU that LLID is 1 asks multicast service；When the forwarding of the second multicast service is identified as
When 0000000000000010, represent that the ONU that LLID is 2 asks multicast service, by that analogy.
Wherein, ONU PON chips include report messages encapsulation preamble information：
LLID is set to the LLID of itself by ONU, and the second multicast service forwarding mark is set to and represents requesting itself multicast
(the n-th position of multicast service forwarding mark is 1 to business as corresponding to by itself, or uses and put the second multicast service identifier
It is equal for binary number corresponding to the LLID values with itself).Wherein, the ONU LLID of itself is distributed by OLT, specifically such as
What distribution belongs to prior art, it is impossible to for limiting protection scope of the present invention.
In this step, the multicast service message from user, which can also be, leaves message.
The second multicast service message encapsulation preamble information from user is included：
The LLID of itself is saved in the LLID of preamble information, and ONU the second multicast service forwarding mark is put
To represent itself not ask multicast service.
Wherein, the second multicast service forwarding mark is set into expression itself does not ask multicast service to include：
The nth position of second multicast service forwarding mark corresponding to the LLID of itself itself multicast industry is not asked into for expression
Business；Or to be set to binary number corresponding with the LLID of itself unequal by the second multicast service forwarding mark.
In this step, when ONU receive from user when leaving (igmp leave) message, ONU user's deletion group
Broadcast and list item corresponding to multicast ip address in message is left in mac address forwarding table, and message encapsulation preamble information will be left
Afterwards, message will be left and is sent to OLT.
Wherein, leaving message includes multicast ip address.
Wherein, when ONU encapsulates preamble information, the second multicast service forwarding mark is set to expression and itself does not ask multicast
(nth position of multicast service forwarding mark is 0 to business as corresponding to by itself, or the second multicast service is forwarded into ident value
Binary number corresponding with the LLID values of itself is unequal).
OLT is received after multicast leaves message, delete in OLT multicast service forward tables to should ONU forwarding-table item.
Referring to Fig. 5, the present invention proposes a kind of method of forwarding multicasting business, applied to OLT, in multicast service message
It is provided for ONU in preamble information to identify whether to ask the multicast service forwarding mark of multicast service, this method includes：
Step 500, OLT receive the second multicast service message from ONU, in the multicast service forward table pre-set
Search less than list item corresponding to multicast ip address in the second multicast service message from ONU, according to the second multicast from ONU
List item corresponding to the preamble information generation of service message；Remove the preamble information of the second multicast service message from ONU
Afterwards, the second multicast service message from ONU is transmitted to OLT user.
In this step, the second multicast service message from ONU can be report messages or leave message.
In this step, multicast service forward table is pre-set on OLT, and there is provided multicast service when pre-setting to turn
All information included in delivering, as shown in table 1, multicast service forward table comprise at least OLT PON interface identifier, multicast IP
Second multicast service forwarding mark corresponding to address and ONU, it is preferable that also including ageing time.
The multicast service forward table of table 1
Wherein, OLT PON interfaces are connected with the main interface of optical splitter, ONU PON interfaces and the stub interface of optical splitter
It is connected, each OLT PON interfaces can connect 128 ONU after being divided by optical splitter；Multicast ip address is the group from ONU
Broadcast the multicast ip address in service message；Multicast service forwarding mark can be the multicast service message from ONU corresponding to ONU
The LLID of middle preamble information.
Wherein, in order to save multicast service forward table resource, while the multicast mac address table ageing time with OLT is ensured
Keep synchronous, ageing time can be increased in multicast service forward table, ageing time initial value is set to maximum M (M and OLT
Multicast mac address table in ageing time maximum it is consistent), each second subtracts 1.When OLT does not receive coming for a certain list item within the M seconds
From after ONU multicast service message makes ageing time be zeroed, multicast service forward table will delete the list item.It is zeroed in ageing time
Before, if the multicast service message from ONU corresponding to receiving the list item, ageing time is set to again maximum M.
For example, program request situation of the OLT PON interfaces 1/1 according to different ONU, generates following multicast service forward table：
The multicast service forward table of table 2
In table, 1/1 represents first PON interface of the business board of the 1st groove position of OLT.
Understand ONU1 program requests 224.1.1.2 multicast service (assuming that multicast service corresponding to the multicast group according to upper table
Flow for A)；ONU2 program requests 224.1.1.3 multicast service (assuming that the corresponding group business stream is B)；Outside ONU1, ONU2
Any group business stream of the non-program requests of other ONU.After OLT receives two Business Streams of A, B, lead code encapsulation is carried out.
Various ways have been packaged to lead code, for example, can be by the way of set in the present embodiment, multicast service
Corresponding ONU1 the 1st position is set to 1 in " multicast service forwarding mark " field in stream A lead codes, other positions 0；
The 2nd of corresponding ONU2 is set to 1 in " multicast service forwarding mark " field in group business stream B lead codes, other positions
It is set to 0.It can also use binary mode, it is corresponding in " multicast service forwarding mark " field in group business stream A lead codes
ONU1 be encapsulated as 0000000000000001；It is right in " multicast service forwarding mark " field in group business stream B lead codes
The ONU2 answered is encapsulated as 0000000000000010.
In this step, OLT finds list item corresponding to multicast ip address in multicast service forward table, if from ONU's
Second multicast service message is report messages, will send the second multicast service corresponding to the ONU of the second multicast service message and turns
Issue of bidding documents, which is known, to be saved in multicast service forward table, and the second multicast service message from ONU is sent into multicast server, table
Bright ONU program requests multicast service, when the second multicast service issues, group business stream is encapsulated according to the multicast service forward table
Lead code；If the second multicast service message from ONU is leaves message, PON chips are by the transmission in the list item found
The ONU of second multicast service message is deleted, and the second multicast service message from ONU is sent to OLT exchange chip；
OLT exchange chip deletes list item corresponding to the multicast ip address in the second multicast service message from ONU in multicast MAC table
Remove, the second multicast service message from ONU is sent to multicast server.
In this step, when OLT receive from ONU when leaving message, OLT will leave message in multicast service forward table
In multicast ip address and preamble information in LLID corresponding to list item delete, the group that will be left in multicast MAC table in message
Broadcast list item corresponding to IP address to delete, message will be left and be sent to multicast server.
Step 501, OLT learn to the multicast ip address in the second multicast service message from ONU, generate MAC
Addresses forwarding table, the second multicast service message from ONU is sent to multicast server；Receive from multicast server
First multicast service message, the first multicast service message is sent to OLT.
Step 502, OLT encapsulate preamble information to the first multicast service message from multicast server, and will come from
First multicast service message of multicast server is sent to all ONU under PON interfaces corresponding to ONU；Or according to from group
Broadcast the multicast ip address in the first multicast service message of server searched in multicast service forward table corresponding to the first multicast
Business forwarding mark, N parts are copied into by the first multicast service message from multicast server；Wherein, N is first found
The number of multicast service forwarding mark；Preamble information is encapsulated to each first multicast service message of duplication, will be each after encapsulation
The the first multicast service message replicated is sent to all ONU under PON interfaces corresponding to ONU.
In this step, the first multicast service message from multicast server can be that group business stream or common group are looked into
Ask message or group-specific query message or the protocol massages of broadcasting packet or multicast frame structure.
In this step, as each corresponding ONU of the first multicast service forwarding mark, OLT from multicast to taking
The first multicast service message encapsulation preamble information of business device, and the first multicast service message from multicast server is sent
To all ONU under PON interfaces corresponding to ONU.Using such a mode, OLT is only needed according to multicast service forward table to difference
The group business stream of multicast group encapsulates preamble information respectively, and ONU can also forward mark to multicast according to multicast service
Business Stream is accepted or rejected
When the first multicast service forwards mark to identify ONU using binary mode, OLT is according to coming from multicast server
The first multicast service message in multicast ip address searched in multicast service forward table corresponding to multicast service forwarding mark,
First group of multicast service message from multicast server is replicated into (N-1) part；Wherein, N is the first multicast service found
Forward the number of mark；Preamble information is encapsulated to the first multicast service message of each duplication, by the of each duplication after encapsulation
One multicast service message is sent to all ONU under PON interfaces corresponding to ONU.Using such a extended mode, it is only necessary to two words
Section can both have been realized forwards management to the multicast service of all ONU under some PON mouth, reduces the traffic overhead of lead code.
Wherein, the first multicast service message encapsulation preamble information of each duplication is included：By first group of N parts from multicast server
Broadcast the forwarding mark of the multicast service in the preamble information of service message and be set to N number of the first multicast service forwarding found respectively
Mark.For example, if N is 2, the first multicast service message from multicast server is replicated portion by user, plus original
It is a two parts altogether, the first multicast service forwarding mark in the preamble information of a copy of it multicast service message is set to
0000000000000001 (0000000000000001 one of multicast service forwarding mark to find), by another
Multicast service forwarding mark in the preamble information of multicast service message is set to 0000000000000010
(0000000000000010 another multicast service forwarding mark to find).
In this step, OLT includes to the first multicast service message encapsulation preamble information from multicast server：OLT
Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server, in multicast service
List item corresponding to searching multicast ip address in forward table, the first multicast service corresponding to the ONU in the list item found is forwarded
Mark is set to the ONU request multicast services in the list item for representing to find, and LLID is set to and represents that multicast service (is such as
0X7FFF)。
In this step, OLT can use group of the prior art according to the first multicast service message from multicast server
Broadcast MAC Address and map out multicast ip address, it is impossible to be used in limit protection scope of the present invention, repeat no more here.
In this step, when OLT receives general query message or group-specific query message, OLT is by general query
Message or group-specific query message encapsulation preamble information, the general query message after encapsulation or group-specific query message are sent out
Give ONU.
Wherein, OLT before packaging preamble information when, by preamble information the first multicast service forwarding mark be set to table
Show that all ONU ask multicast service under PON interfaces corresponding to ONU.For example, mark can be forwarded to be set to complete 1 multicast service.
In this step, when OLT receives the protocol massages of broadcasting packet or multicast frame structure：OLT by broadcasting packet or
The protocol massages encapsulation preamble information of multicast frame structure, ONU is sent to by the broadcasting packet after encapsulation or protocol massages.
Wherein, OLT before packaging preamble information when, by preamble information multicast service forwarding mark be set to expression
All ONU ask multicast service under PON interfaces corresponding to ONU.
After ONU receives the protocol massages of broadcasting packet or multicast frame structure, due to the first multicast in preamble information
Business forwarding, which is identified as, represents that all ONU ask multicast service under PON interfaces corresponding to ONU, and ONU is according to the broadcast received
The protocol massages of message or multicast frame structure carry out subsequent treatment.
Referring to Fig. 6, the invention also provides a kind of optical network unit, comprise at least：
Package module, for being decapsulated to the first multicast service message from optical line terminal OLT；
Judge module, for the LLID LLID according to its preamble information and whether allow to receive the first multicast
The first multicast service forwarding mark of business is judged, if allowing to receive, the first multicast service message is sent into user,
Otherwise, the first multicast service message is abandoned.
In the optical network unit of the present invention, package module is additionally operable to：
To being sent to OLT after the second multicast service message encapsulation preamble information from user, preamble information is at least
Whether LLID and instruction ONU including ONU ask the second multicast service of multicast service to forward mark.
In the optical network unit of the present invention, the multicast service message from user is report report messages；
Optical network unit also includes：
Generation module, for learning to the multicast internet protocol IP address in report messages, generation multicast is situated between
Matter access control MAC addresses forward table；
Package module specifically includes the second multicast service message encapsulation preamble information from user：
The LLID of itself is saved in the LLID of preamble information, and multicast service forwarding mark is set to expression itself
Ask multicast service.
In the optical network unit of the present invention, the multicast service message from user is to leave message；
Optical network unit, in addition to：
Removing module, list item corresponding to multicast ip address in message is left in multicast mac address forward table for deleting；
Package module specifically includes the second multicast service message encapsulation preamble information from user：
The LLID of itself is saved in the LLID of preamble information, and multicast service forwarding mark is set to expression itself
Multicast service is not asked.
Referring to Fig. 7, the invention also provides a kind of optical line terminal, comprise at least：
Searching modul, for receiving the second multicast service message from optical network unit ONU, in the multicast pre-set
Searched in business forward table less than table corresponding to the multicast internet protocol IP address in the second multicast service message from ONU
, according to list item corresponding to the generation of the preamble information of the second multicast service message from ONU；Remove second from ONU
After the preamble information of multicast service message, the second multicast service message from ONU is transmitted to multicast server；
Package module, for encapsulating preamble information to the first multicast service message from multicast server, and will envelope
The first multicast service message from multicast server after dress is sent to all ONU under PON interfaces corresponding to ONU；Or
Multicast ip address in the first multicast service message from multicast server is searched corresponding in multicast service forward table
The first multicast service forwarding mark, by from multicast server the first multicast service message replicate (N-1) part；Wherein, N is
The number of the first multicast service forwarding mark found；Preamble information is encapsulated to the first multicast service message of each duplication,
All ONU first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU；
Generation module, for learning to the multicast ip address in the second multicast service message from ONU, generation group
Medium access control mac address forwarding table is broadcast, the second multicast service message from ONU is sent to multicast server.
In the optical line terminal of the present invention, searching modul is additionally operable to：
The multicast internet protocol IP in the second multicast service message from ONU is found in multicast service forward table
List item corresponding to address, the second multicast service forwarding mark is saved in multicast industry corresponding to the ONU that will send multicast service message
In forward table of being engaged in；
Or delete the ONU of transmission the second multicast service message in the list item found, and by multicast MAC table
Deleted from list item corresponding to the multicast ip address in ONU the second multicast service message, by the second multicast service report from ONU
Text is sent to multicast server.
In the optical line terminal of the present invention, before package module is to the first multicast service message encapsulation from multicast server
Preamble information is specifically used for：
Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server,
List item corresponding to multicast ip address is searched in multicast service forward table, by the first multicast corresponding to the ONU in the list item found
Business forwarding is identified as the ONU request multicast services in the list item for representing to find.
The invention also provides a kind of system of forwarding multicasting service message, comprise at least：
Optical network unit ONU, for being decapsulated to the first multicast service message from optical line terminal OLT, root
According to its preamble information LLID LLID and whether allow receive the first multicast service the first multicast service forward
Mark is judged, if allowing to receive, the first multicast service message is sent into user, otherwise, abandons the first multicast industry
Business message；
Optical line terminal OLT, for sending the first multicast service message to ONU.
In the system of the present invention, ONU is additionally operable to：
To being sent to OLT after the second multicast service message encapsulation preamble information from user, preamble information is at least
Whether LLID and instruction ONU including ONU ask the second multicast service of multicast service to forward mark；
OLT is additionally operable to：
The second multicast service message from ONU is received, searches in the multicast service forward table pre-set and does not arrive
From list item corresponding to the multicast internet protocol IP address in ONU the second multicast service message, according to second group from ONU
Broadcast list item corresponding to multicast ip address and the preamble information generation in service message；Remove the second multicast service from ONU
After the preamble information of message, the multicast ip address in the second multicast service message from ONU is learnt, generates multicast
Medium access control mac address forwarding table, the second multicast service message from ONU is sent to multicast server；Receive
The first multicast service message from multicast server, lead code is encapsulated to the first multicast service message from multicast server
Information, and the first multicast service message from multicast server after encapsulation is sent to the institute under PON interfaces corresponding to ONU
There is ONU；
Or the multicast ip address in the first multicast service message from multicast server forwards in multicast service
First multicast service forwarding mark corresponding to being searched in table, by the first multicast service message from multicast server replicate
(N-1) part；Wherein, N is the number of the first multicast service forwarding mark found；To the first multicast service message of each duplication
Encapsulate preamble information, the institute the first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU
There is ONU.
In the system of the present invention, OLT is additionally operable to：
The multicast internet protocol IP in the second multicast service message from ONU is found in multicast service forward table
List item corresponding to address, the second multicast service forwarding mark is saved in group corresponding to the ONU that will send the second multicast service message
Broadcast in business forward table；
Or delete the ONU of transmission the second multicast service message in the list item found, and by multicast MAC table
Deleted from list item corresponding to the multicast ip address in ONU the second multicast service message, by the second multicast service report from ONU
Text is sent to multicast server.
It should be noted that embodiment described above be for only for ease of it will be understood by those skilled in the art that, and
It is not used in and limits the scope of the invention, on the premise of the inventive concept of the present invention is not departed from, those skilled in the art couple
Any obvious replacement and improvement that the present invention is made etc. is within protection scope of the present invention.
Claims (23)
- A kind of 1. method of forwarding multicasting service message, applied to the optical-fiber network being arranged between user and optical line terminal OLT Unit ONU, it is characterised in that this method includes：The ONU decapsulates to the first multicast service message from optical line terminal OLT, according to its preamble information LLID LLID and whether allow receive the first multicast service the first multicast service forwarding mark judged, if sentencing Disconnected is out to represent multicast service from the LLID of the preamble information of OLT the first multicast service message, and first from OLT The first multicast service forwarding of the preamble information of multicast service message, which is identified as, represents requesting itself multicast service, then allows to connect Receive, the first multicast service message is sent to user, otherwise, abandons the first multicast service message.
- 2. according to the method for claim 1, it is characterised in that also include before this method：The ONU is described leading to being sent to the OLT after the second multicast service message encapsulation preamble information from user Whether code information asks the second multicast service of multicast service to forward mark including at least the LLID and the instruction ONU of the ONU Know.
- 3. according to the method for claim 2, it is characterised in that under the second multicast service forwarding mark and the OLT Each ONU uniquely correspond to.
- 4. according to the method for claim 1, it is characterised in that the setting length in the first multicast service forwarding mark Binary coding in really position it is uniquely corresponding with the ONU.
- 5. according to the method for claim 1, it is characterised in that the setting length in the first multicast service forwarding mark Whole binary coding it is uniquely corresponding with the ONU.
- 6. according to any described method of claim 2~5, it is characterised in that when second multicast service from user When message is reports report messages, the ONU also includes before encapsulating preamble information to the report messages：The ONU learns to the multicast internet protocol IP address in the report messages, generates multicast medium access Control mac address forwarding table；The described pair of report messages encapsulation preamble information from user includes：The LLID of the ONU is saved in the LLID of preamble information, and the second multicast service of the ONU is forwarded into mark It is designated as asking multicast service.
- 7. according to any described method of claim 2~5, it is characterised in that when the multicast service message from user During to leave message, the ONU before leaving message encapsulation preamble information to also including：List item corresponding to the multicast ip address in message is left described in deletion multicast mac address forward table；The described pair of message encapsulation preamble information of leaving from user includes：The LLID of the ONU is saved in the LLID of preamble information, and the second multicast service of the ONU is forwarded into mark It is designated as not asking multicast service.
- 8. according to the method for claim 1, it is characterised in that the ONU receives the first multicast industry from the OLT Business message is query message.
- A kind of 9. method of forwarding multicasting business, it is characterised in that applied between multicast server and optical network unit ONU Optical line terminal OLT, this method include：OLT receive the second multicast service message from ONU, in the multicast service forward table pre-set search less than from List item corresponding to multicast internet protocol IP address in ONU the second multicast service message, according to the second multicast from ONU List item corresponding to multicast ip address and preamble information generation in service message；Remove the second multicast service report from ONU After the preamble information of text, the multicast ip address in the second multicast service message from ONU is learnt, generation multicast is situated between Matter access control MAC addresses forward table, the second multicast service message from ONU is sent to multicast server；Receive and From the first multicast service message of multicast server, to the first multicast service message encapsulation lead code letter from multicast server Breath, and the first multicast service message from multicast server after encapsulation is sent under PON interfaces corresponding to the ONU All ONU；Wherein, described pair of the first multicast service message encapsulation preamble information from multicast server includes：To first The preamble information of multicast service message is extended, and is provided for identifying first group that whether ONU asks the first multicast service Broadcast business forwarding mark；Or the multicast ip address in the first multicast service message from multicast server forwards in the multicast service First multicast service forwarding mark corresponding to being searched in table, by the first multicast service message from multicast server replicate (N-1) part；Wherein, N is the number of the first multicast service forwarding mark found；To the first multicast service message of each duplication Encapsulate preamble information, the institute the first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU There is ONU；Wherein, the first multicast service message encapsulation preamble information to each duplication includes：To the first multicast service report The preamble information of text is extended, and is provided for identifying whether ONU asks the first multicast service of the first multicast service to forward Mark.
- 10. according to the method for claim 9, it is characterised in that the multicast service message encapsulation to each duplication is leading Code information includes：Multicast service forwarding mark in the preamble information of N parts the first multicast service message is set to N number of find respectively First multicast service forwarding mark.
- 11. according to the method for claim 9, it is characterised in that when the OLT finds institute in multicast service forward table When stating list item corresponding to the multicast internet protocol IP address in the second multicast service message from ONU, this method also includes：The second multicast service forwarding mark is saved in multicast service and turned corresponding to the ONU that the second multicast service message will be sent In delivering；Or delete the ONU of transmission the second multicast service message in the list item found, and by institute in multicast MAC table State corresponding to the multicast ip address in the second multicast service message from ONU list item to delete, by second group from ONU Broadcast service message and be sent to the multicast server.
- 12. according to the method for claim 10, it is characterised in that described pair of the first multicast service from multicast server Message encapsulation preamble information includes：Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server, List item corresponding to the multicast ip address is searched in the first multicast service forward table, by ONU pairs in the list item found The the first multicast service forwarding mark answered is set to the ONU request multicast services in the list item for representing to find.
- 13. according to the method for claim 9, it is characterised in that the first multicast service report from multicast server Text is general query message or group-specific query message, or the protocol massages of broadcasting packet or multicast frame structure；The OLT exists When encapsulating preamble information, the first multicast service forwarding mark in the preamble information is set to and represents that the ONU is corresponding PON interfaces under all ONU ask multicast service.
- 14. a kind of optical network unit, it is characterised in that comprise at least：Package module, for being decapsulated to the first multicast service message from optical line terminal OLT；Judge module, for the LLID LLID according to its preamble information and whether allow to receive the first multicast service The first multicast service forwarding mark judged, if judging the preamble information of the first multicast service message from OLT LLID for represent multicast service, and the first multicast service of the preamble information of the first multicast service message from OLT turn Hair, which is identified as, represents requesting itself multicast service, then allows to receive, the first multicast service message is sent into user, no Then, the first multicast service message is abandoned.
- 15. optical network unit according to claim 14, it is characterised in that the package module is additionally operable to：To being sent to the OLT, the preamble information after the second multicast service message encapsulation preamble information from user Whether LLID and the instruction ONU including at least the ONU ask the second multicast service of multicast service to forward mark.
- 16. optical network unit according to claim 15, it is characterised in that the multicast service message from user is Report report messages；The optical network unit also includes：Generation module, for learning to the multicast internet protocol IP address in the report messages, generation multicast is situated between Matter access control MAC addresses forward table；The package module specifically includes the second multicast service message encapsulation preamble information from user：The LLID of itself is saved in the LLID of the preamble information, and multicast service forwarding mark is set to expression Requesting itself multicast service.
- 17. optical network unit according to claim 15, the multicast service message from user is to leave message；The optical network unit, in addition to：Removing module, list item corresponding to multicast ip address in message is left in multicast mac address forward table for deleting；The package module specifically includes the second multicast service message encapsulation preamble information from user：The LLID of itself is saved in the LLID of the preamble information, and multicast service forwarding mark is set to expression Itself does not ask multicast service.
- 18. a kind of optical line terminal, it is characterised in that comprise at least：Searching modul, for receiving the second multicast service message from optical network unit ONU, in the multicast service pre-set Searched in forward table less than table corresponding to the multicast internet protocol IP address in the second multicast service message from ONU , according to list item corresponding to the generation of the preamble information of the second multicast service message from ONU；Remove described come from After the preamble information of ONU the second multicast service message, the second multicast service message from ONU is transmitted to multicast services Device；Package module, for encapsulating preamble information to the first multicast service message from multicast server, and by after encapsulation The first multicast service message from multicast server be sent to all ONU under PON interfaces corresponding to the ONU, wherein, Described pair of the first multicast service message encapsulation preamble information from multicast server includes：To the first multicast service message Preamble information is extended, and is provided for identifying whether ONU asks the first multicast service of the first multicast service to forward mark； Or the multicast ip address in the first multicast service message from multicast server is searched in multicast service forward table Corresponding first multicast service forwarding mark, the first multicast service message from multicast server is replicated into (N-1) part； Wherein, N is the number of the first multicast service forwarding mark found；The first multicast service message encapsulation to each duplication is leading Code information, the first multicast service message of each duplication after encapsulation is sent to all under PON interfaces corresponding to the ONU ONU, wherein, the first multicast service message encapsulation preamble information to each duplication includes：To the first multicast service message Preamble information be extended, be provided for identify ONU whether ask the first multicast service the first multicast service forward mark Know；Generation module, for learning to the multicast ip address in the second multicast service message from ONU, generation multicast is situated between Matter access control MAC addresses forward table, the second multicast service message from ONU is sent to multicast server.
- 19. optical line terminal according to claim 18, it is characterised in that the searching modul is additionally operable to：The multicast internet protocol IP in the second multicast service message from ONU is found in multicast service forward table List item corresponding to address, the second multicast service forwarding mark is saved in group corresponding to the ONU that will send the multicast service message Broadcast in business forward table；Or delete the ONU of transmission the second multicast service message in the list item found, and by institute in multicast MAC table State corresponding to the multicast ip address in the second multicast service message from ONU list item to delete, by second group from ONU Broadcast service message and be sent to the multicast server.
- 20. optical line terminal according to claim 18, it is characterised in that the package module is to from multicast server The first multicast service message encapsulation preamble information be specifically used for：Multicast ip address is mapped out according to the multicast mac address of the first multicast service message from multicast server, List item corresponding to the multicast ip address is searched in the multicast service forward table, by corresponding to the ONU in the list item found The forwarding of first multicast service is identified as the ONU request multicast services in the list item for representing to find.
- 21. a kind of system of forwarding multicasting service message, it is characterised in that comprise at least：Optical network unit ONU, for being decapsulated to the first multicast service message from optical line terminal OLT, according to it The LLID LLID of preamble information and the first multicast service forwarding mark for whether allowing the first multicast service of reception Judged, if the LLID for judging the preamble information of the first multicast service message from OLT is expression multicast service, and The first multicast service forwarding of the preamble information of the first multicast service message from OLT, which is identified as, represents requesting itself multicast Business, then allow to receive, the first multicast service message is sent to user, otherwise, abandon the first multicast service message；Optical line terminal OLT, for sending the first multicast service message to ONU.
- 22. system according to claim 21, it is characterised in that the ONU is additionally operable to：To being sent to the OLT, the preamble information after the second multicast service message encapsulation preamble information from user Whether LLID and the instruction ONU including at least the ONU ask the second multicast service of multicast service to forward mark；The OLT is additionally operable to：The second multicast service message from ONU is received, is searched in the multicast service forward table pre-set less than from ONU The second multicast service message in multicast internet protocol IP address corresponding to list item, according to the second multicast industry from ONU List item corresponding to multicast ip address and the preamble information generation being engaged in message；Remove the second multicast service message from ONU Preamble information after, the multicast ip address in the second multicast service message from ONU is learnt, generate multicast medium Access control MAC addresses forward table, the second multicast service message from ONU is sent to multicast server；Receive and come from First multicast service message of multicast server, to the first multicast service message encapsulation lead code letter from multicast server Breath, and the first multicast service message from multicast server after encapsulation is sent under PON interfaces corresponding to the ONU All ONU；Or the multicast ip address in the first multicast service message from multicast server forwards in the multicast service First multicast service forwarding mark corresponding to being searched in table, by the first multicast service message from multicast server replicate (N-1) part；Wherein, N is the number of the first multicast service forwarding mark found；To the first multicast service message of each duplication Encapsulate preamble information, the institute the first multicast service message of each duplication after encapsulation being sent under PON interfaces corresponding to ONU There is ONU.
- 23. system according to claim 22, it is characterised in that the OLT is additionally operable to：The multicast internet protocol IP in the second multicast service message from ONU is found in multicast service forward table List item corresponding to address, the second multicast service forwarding mark corresponding to the ONU of the second multicast service message will be sent and preserved Into multicast service forward table；Or delete the ONU of transmission the second multicast service message in the list item found, and by institute in multicast MAC table State corresponding to the multicast ip address in the second multicast service message from ONU list item to delete, by second group from ONU Broadcast service message and be sent to the multicast server.
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| CN105610590B (en) * | 2015-12-18 | 2018-12-11 | 新华三技术有限公司 | A kind of multicast message transmission method and device |
| CN109905785B (en) * | 2019-03-29 | 2021-05-28 | 新华三技术有限公司 | Message forwarding method and device |
| CN112423164A (en) * | 2020-11-03 | 2021-02-26 | 河南理工大学 | Redirection mechanism based on optimized MPCP protocol |
| CN112822128B (en) * | 2020-12-30 | 2023-04-07 | 瑞斯康达科技发展股份有限公司 | PON system message mirroring method and PON system |
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| CN101051923A (en) * | 2007-04-05 | 2007-10-10 | 中兴通讯股份有限公司 | Multicast control method in ether passive optical network |
| CN101150425A (en) * | 2007-11-15 | 2008-03-26 | 中国电信股份有限公司 | Right control method for multicast service and its optical network unit and optical line terminal |
| CN102065344A (en) * | 2009-11-12 | 2011-05-18 | 中兴通讯股份有限公司 | Data transmission method and gigabit-capable passive optical network system |
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