CN106302264B - Dune exchanges the unicast message interoperability methods and device between cable card board and flexible cable card board - Google Patents
Dune exchanges the unicast message interoperability methods and device between cable card board and flexible cable card board Download PDFInfo
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Abstract
The application proposes the unicast message interoperability methods and device between Dune exchange cable card board and flexible cable card board.Method includes: that flexible cable card board receives the unicast message for encapsulating two layers of head, and the outgoing interface for finding the next-hop of unicast message is located at Dune exchange cable card board；It is that the first unicast message encapsulates new two layers of head according to the next-hop of the unicast message, the unicast message for encapsulating new two layers of head is encapsulated as with communication between plates head and two layers PPH communication between plates messages；Dune exchange cable card board is sent by communication between plates message；Wherein, the outgoing interface of the two layers PPH next-hops for carrying the unicast message is identified in the corresponding physical port of Dune exchange cable card board；Dune exchanges communication message between cable card board receiver board, removes the communication between plates head and two layers of PPH head of message, identifies the unicast message that corresponding physical port transmission encapsulates new two layers of head by the physical port.The application realizes the unicast message intercommunication between Dune exchange cable card board and flexible cable card board.
Description
Technical field
This application involves the unicasts between board interworking technology field more particularly to Dune exchange cable card board and flexible cable card board
Message interoperability methods and device.
Background technique
From interface density and cost angle, fot router can be divided into two classes, one kind be may be programmed, may customize, with
CPU (Central Processing Unit, central processing unit)/FPGA (Field Programmable Gate Array,
Field programmable gate array)/NP (Network Processor, network processing unit) be forward core flexible cable card board, it is another
Class is that function is relatively fixed, cost is dominant, is the exchange cable card board for forwarding core with exchange chip.When there are two in same system
When the different cable card boards of kind, intercommunication problem certainly will be introduced.
Existing typical exchange chip has: the exchange chip (abbreviation XGS exchange chip) of XGS framework and Dune framework
Exchange chip (abbreviation Dune exchange chip).
The realization principle of Dune exchange chip is more special, specifically: uplink module inquires various list items, such as interface
Table, FIB (Forward Information Base, forwarding information storehouse) table, ILM (Incoming Label Map, input label
Mapping) table etc., but do not make any change to message, then increase PPH (Packet Processing before message
Header, Message processing head) modification information is carried, substantial modifications, such as additions and deletions label, modification IP are completed by downstream module
Two layers of head, increase encapsulation etc..
Dune exchange chip provides higher list item specification, bigger interface caching, stronger QOS (Quality of Service,
Service quality) function, it is generally used for the exchange cable card board of high-end/core switch and router.Made using Dune exchange chip
Cable card board is exchanged to forward the cable card board of core to be referred to as Dune.
Summary of the invention
The embodiment of the present application provides the unicast message interoperability methods and device between Dune exchange cable card board and flexible cable card board.
The technical solution of the application is achieved in that
A kind of unicast message interoperability methods between Dune exchange cable card board and flexible cable card board, this method comprises:
The flexible cable card board receives the first unicast message for encapsulating two layers of head, finds the next of the first unicast message
The outgoing interface of jump is located at Dune exchange cable card board；It is the first unicast report according to the next-hop of first unicast message
Text encapsulates new two layers of head, and first unicast message for encapsulating new two layers of head is encapsulated as with communication between plates head and two layers
PPH the first communication between plates messages；The Dune exchange cable card board is sent by the first communication between plates message；Wherein,
Two layers PPH of the first communication between plates message carry the outgoing interface of the next-hop of first unicast message described
Dune exchanges the corresponding physical port mark of cable card board；
The Dune exchange cable card board receives the first communication between plates message, removes the first communication between plates message
Communication between plates head and two layers of PPH head identify corresponding physical port transmission by the physical port and encapsulate new two layers of head
First unicast message.
A kind of unicast message intercommunication equipment between Dune exchange cable card board and flexible cable card board, the equipment include:
Flexible cable card board: the first unicast message for encapsulating two layers of head is received, the next-hop of the first unicast message is found
Outgoing interface be located at the Dune exchange cable card board；It is first unicast message according to the next-hop of first unicast message
New two layers of head is encapsulated, first unicast message for encapsulating new two layers of head is encapsulated as with communication between plates head and two layers of PPH
First communication between plates message of head；The Dune exchange cable card board is sent by the first communication between plates message；Wherein, described
Two layers PPH of the first communication between plates message outgoing interfaces for carrying the next-hop of first unicast message are handed in the Dune
The corresponding physical port mark of thread-changing snap-gauge；
Dune exchanges cable card board: receiving the first communication between plates message, removes the plate of the first communication between plates message
Between communicate head and two layers of PPH head, corresponding physical port identified by the physical port send and encapsulate the of new two layers of head
One unicast message.
As it can be seen that the embodiment of the present application can be realized the unicast message intercommunication between Dune exchange cable card board and flexible cable card board,
And it realizes simple.
Detailed description of the invention
Fig. 1 is the unicast message intercommunication side between one embodiment of the application Dune exchange cable card board provided and flexible cable card board
Method flow chart；
Fig. 2 is the signal of the routing device provided by the embodiments of the present application that cable card board and flexible cable card board are exchanged comprising Dune
Figure；
Fig. 3 is that two layers of unicast message of Dune provided by the embodiments of the present application exchange cable card board access pass through flexible cable card board
The flow chart of transmission；
Fig. 4 is that two layers of unicast message of flexible cable card board access provided by the embodiments of the present application exchange cable card board by Dune
The flow chart of transmission.
Specific embodiment
Fig. 1 is the unicast message intercommunication side between one embodiment of the application Dune exchange cable card board provided and flexible cable card board
Method flow chart, the specific steps of which are as follows:
Step 101: flexible cable card board receives the first unicast message for encapsulating two layers of head, finds the first unicast message
The outgoing interface of next-hop is located at Dune exchange cable card board；
Step 102: flexible cable card board is that the first unicast message encapsulates new two layers of head according to the next-hop of the first unicast message,
The first unicast message for encapsulating new two layers of head is encapsulated as with communication between plates head and two layers PPH the first communication between plates reports
Text；Wherein, two layers of the first communication between plates message PPH carry the outgoing interface of the next-hop of the first unicast message in the Dune
Exchange the corresponding physical port mark of cable card board；
Step 103: the first communication between plates message is sent Dune exchange cable card board by flexible cable card board；
Step 104:Dune exchanges cable card board and receives the first communication between plates message, between the plate for removing the first communication between plates message
Communicate head and two layers of PPH head；
Step 105:Dune switched line card identifies corresponding physical port by the physical port of two layers of PPH carrying and sends
Encapsulate the first unicast message of new two layers of head.
Preferably, Dune exchanges cable card board and receives the second unicast message for encapsulating two layers of head, finds the second unicast report
The outgoing interface of the next-hop of text is located at flexible cable card board；The second unicast message for encapsulating two layers of head is encapsulated as with logical between plate
Believe head and two layers PPH the second communication between plates messages；Second communication between plates message is sent to the flexible cable card board；The flexible line
Snap-gauge receives the second communication between plates message；Remove the communication between plates head and two layers of PPH head of the second communication between plates message；According to second
The next-hop of unicast message is that the second unicast message encapsulates new two layers of head, and the second unicast message for encapsulating new two layers of head is passed through
The outgoing interface of the next-hop of the second unicast message is sent on this plate.
Preferably, Dune exchanges the configuration that cable card board synchronizes the physical port of this Dune exchange cable card board to flexible cable card board
Information, in step 101, Dune exchanges cable card board and encapsulates two layers of head in two layers of PPH setting of the second communication between plates message
The mark of the receiving port of second unicast message；In step 102, flexible cable card board reads the mark of the receiving port；According to
The configuration information of the physical port of the synchronization checks that the receiving port enables the unicast forwarding of second unicast message.
Preferably, the first unicast message and the second unicast message are to encapsulate one of the following unicast message of two layers of head:
IPv4 unicast message, IPv6 unicast message, MPLS (Multi-Protocol Label Switching, multi-protocols
Tag switching) VLL (Virtual Leased Line, VLL) unicast message, MPLS VPLS (Virtual
Private LAN Service, Virtual Private LAN Service) unicast message, MPLS L3VPN (Layer3Virtual
Private Network, Layer3 Virtual Private Network) unicast message, (Generic Routing Encapsulation leads to GRE
With routed encapsulation) unicast message, VxLAN (Virtual eXtensible Local Area Network, virtual extended local
Net) unicast message.
Fig. 2 is the signal of the routing device provided by the embodiments of the present application that cable card board and flexible cable card board are exchanged comprising Dune
Figure.As shown in Fig. 2, the routing device 200 is by master control borad 211, backboard 212, flexible cable card board 231-234 and Dune switched line
Snap-gauge 241-243 composition.
Dune exchanges cable card board 241-243 under the triggering of drive module, respectively by the physical port configuration information of this plate
It is synchronized to flexible cable card board 231-234.Flexible cable card board 231-234 saves the object of synchronous Dune exchange cable card board 241-243
Manage port configuration information.Physical port configuration information generally refers to the enabled pass-through mode of physical port, such as: unicast.
Dune exchange cable card board 241-243 between, between flexible cable card board 231-234 and Dune exchange cable card board 241-243 and spirit
The forwarding-table item of each self study is mutually in step between hot line snap-gauge 231-234 in routing device, for example mac address table.These
The forwarding-table item of this plate forwarding chip is synchronized to the central processing unit of other cable card boards by the central processing unit of cable card board, will
The synchronous forwarding-table item of the central processing unit of other cable card boards is stored in the memory of this plate forwarding chip.Master control borad 211
Central processing unit, for example CPU, the forwarding-table item that this plate is learnt, for example adjacency list, fib table are synchronized to flexible cable card board
The central processing unit of 231-234 and Dune exchange cable card board 241-243, flexible cable card board 231-234 and Dune exchange line card
The synchronous list item of master control borad 211 is stored in the memory of the forwarding chip of this plate by the respective central processing unit of plate 241-243.
Two layers of PPH message and three layers of PPH can be carried by the communication between plates message that backboard forwards between Dune exchange cable card board 241-243
Message.It is held between Dune exchange cable card board 241-243 and flexible cable card board 231-234 by the communication between plates message that backboard forwards
Carry two layers of PPH message.
Fig. 3 is that two layers of unicast message of Dune provided by the embodiments of the present application exchange cable card board access pass through flexible cable card board
The flow chart of transmission, it includes the step of it is as follows:
Step 301: flexible cable card board 231 receives the IPv4 unicast message of encapsulation ether net head from own physical port.
Step 302: the outgoing interface that flexible cable card board 231 finds next-hop is located at Dune exchange cable card board 243.
Flexible cable card board 231 is determined according to the MAC Address list item that the target MAC (Media Access Control) address of ether net head is found executes three layers
Forwarding, finds the next-hop ip address and outgoing interface of the purpose IP address of IPv4 unicast message in fib table, in adjacency list
Find the MAC Address of next-hop ip address.For example, the outgoing interface that flexible cable card board 231 is found in fib table is global letter
Breath is the port numbers by master control borad generation and the slot number comprising identifying cable card board and identification physical port.
Step 303: flexible cable card board 231 is the IPv4 unicast report received according to the corresponding MAC Address of next-hop ip address
Text encapsulates new ethernet header, includes the corresponding physical port of outgoing interface to encapsulate the IPv4 unicast message encapsulation of new ether net head
Two layers of PPH head of mark；Communication between plates head is encapsulated again, and communication between plates message is sent to Dune exchange cable card board 243, Dune is handed over
The corresponding physical port mark of the outgoing interface of IPv4 unicast message next-hop is carried in two layers of PPH head on thread-changing snap-gauge.
Flexible cable card board 231 is that the IPv4 unicast message received encapsulates newly by purpose MAC Address of the MAC Address of next-hop
Ether net head, by the next-hop ip address found in fib table correspond to outgoing interface be converted into Dune exchange cable card board 243 object
The mark of port is managed, is carried in two layers PPH.
In routing device, the forwarding head of communication between plates message is for example believed in higig comprising source device and purpose equipment
Breath.Communication between plates message after encapsulation is sent to backboard by flexible cable card board 231, is sent out by communication line between routing device inner panel
Cable card board 243 is exchanged toward Dune.In Higig, identify that the mark of source device can be the slot number of flexible cable card board 231,
The mark of identifying purpose equipment can be the slot number of Dune exchange cable card board 243.
Step 305:Dune exchange cable card board 243 receive the communication between plates message from flexible cable card board 231, remove plate between
Head and two layers of PPH head are communicated, corresponding physical port transmission is identified by the physical port in two layers PPH and encapsulates new ether
The IPv4 unicast message of net head.
Dune exchange cable card board 243 receives the communication between plates message of straddle, finds the purpose slot number of the higig head of message
It is directed toward this cable card board, reading the corresponding physical port mark of outgoing interface in two layers PPH according to the fixed offset value of two layers of PPH is
Can determine the physical port to send the IPv4 unicast message for encapsulating new ether net head, without carry out it is any table look-up processing and
Modify the processing of message.
The forwarding chip realization principle that Dune exchanges cable card board is special, can inquire forwarding-table item, for example MAC table, interface
Table, fib table, ILM table, but do not make any change to message.By forwarding process shown in Fig. 3, the flexible line of message is accessed
Snap-gauge completes forwarding-table item inquiry, Reseals ether net head according to the next-hop of purpose IP address, and next-hop is existed
Dune exchanges the physical port mark on cable card board and directly carries in two layers PPH.Dune exchanges cable card board can direct basis
Physical port mark acquisition in two layers of PPH in communication between plates message has Resealed the IPv4 unicast message of ether net head extremely
The port of next-hop, Dune exchange cable card board are not necessarily to search forwarding table, save forward efficiency, more avoid Dune exchange line card
The forwarding chip of plate due to can not modify message caused by forward obstructed problem.
Fig. 4 is that two layers of unicast message of flexible cable card board access provided by the embodiments of the present application exchange cable card board by Dune
The flow chart of transmission, specific step is as follows
Step 401:Dune exchange cable card board 241 receives the IPv4 unicast message for encapsulating ether net head.
The outgoing interface for the next-hop that step 402:Dune exchange cable card board 241 finds the IPv4 unicast message received is located at
Flexible cable card board 234.
Dune exchanges cable card board 241 and determines execution according to the MAC Address list item that the target MAC (Media Access Control) address of ether net head is found
Three layers of forwarding, find the next-hop ip address and outgoing interface of the purpose IP address of IPv4 unicast message in fib table, according to out
The slot number of interface determines that the outgoing interface of next-hop is located at flexible cable card board 234.
It, cannot be to the IPv4 for encapsulating ether net head after the forwarding chip that Dune exchanges cable card board 241 searches forwarding-table item
Unicast message is modified.The forwarding chip of Dune exchange cable card board 241 will encapsulate the IPv4 unicast message of ether net head
The corresponding mark of receiving port carries in two layers PPH incoming interface fields.The forwarding chip of Dune exchange cable card board 241
The index of the outgoing interface found and adjacency list can be added to the respective field at two layers PPH.Alternatively, Dune switched line
Two layers PPH incoming interface fields are arranged according to the mark of the receiving port of message for the forwarding chip of snap-gauge 241, to two layers of PPH
Other fields of head keep default value.
Step 403:Dune exchanges cable card board 241 and the IPv4 unicast message for encapsulating ether net head is encapsulated as between plate
Head and two layers PPH communication between plates messages are communicated, flexible cable card board 234 is sent to.
Step 404: flexible cable card board 234 receives the communication between plates message from Dune exchange cable card board 241；Between removal plate
The communication between plates head of communication message and two layers of PPH head；It is that the encapsulation of IPv4 unicast message is new according to the next-hop of IPv4 unicast message
The IPv4 unicast message for encapsulating new ether net head is passed through the next-hop of arrival IPv4 unicast message on this plate by ether net head
Outgoing interface is sent.
Flexible cable card board 234 receives communication between plates message, can be exchanged according to higig determining Dune cable card boards 241 by this
Communication between plates message is sent to this plate.Flexible cable card board 234 is read two in communication between plates message according to the fixed offset value of two layers of PPH
The mark of the receiving port of incoming interface field in PPH, layer searches Dune exchange cable card board 241 and synchronizes the port come with confidence
Breath, confirmation receiving port have enabled the forwarding of IPv4 Protocol unicast.Flexible cable card board 234 removes two layers of PPH head, according to Ethernet
The MAC Address list item that the target MAC (Media Access Control) address of head is found, which determines, executes three layers of forwarding, finds IPv4 unicast message in fib table
Purpose IP address next-hop ip address and outgoing interface, the MAC Address of next-hop ip address is found in adjacency list, with
The MAC Address of next-hop is that purpose MAC Address Reseals ether net head, by the forwarding of outgoing interface on this plate Reseal with
The too IPv4 unicast message of net head.
Although meaning is changeable from above-described embodiment it can be seen that the definition of each field is complicated in PPH.But Dune is handed over
When thread-changing snap-gauge receives two layers of unicast message from own physical port, find that the outgoing interface of message is located at after executing entry lookup
It on flexible cable card board, does not then modify to two layers of unicast message, indicates that flexible cable card board forwards without in PPH carryings
The control information of processing.The message received is sent to flexible cable card board by communication between plates by Dune exchange cable card board, directly right
The original unicast message that Dune exchanges the original access of cable card board executes entry lookup in this plate and is sent out by the physical port of this plate
It send, various message modifications and forwarding instruction is obtained without parsing whole fields of complicated PPH head, greatly reduces flexible line
The implementation complexity of snap-gauge.
The embodiment of Fig. 2-Fig. 4 of the present invention using Ethernet encapsulation IPv4 unicast message for implementation of the invention into
Explanation is gone, those skilled in the art embodiment can carry out other transformation according to the present invention.For example, other than ether net head
It can also be other two layers of link protocol headings, in addition to IPv4 unicast message, can also be IPv6 unicast message, GRE unicast
Message, VxLAN unicast message, MPLS VLL unicast message, MPLS VPLS unicast message, MPLS L3VPN unicast message.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (8)
1. the unicast message interoperability methods between a kind of Dune exchange cable card board and flexible cable card board, which is characterized in that this method packet
It includes:
The flexible cable card board receives the first unicast message for encapsulating two layers of head, finds the next-hop of the first unicast message
Outgoing interface is located at Dune exchange cable card board；It is first unicast message envelope according to the next-hop of first unicast message
New two layers of head is filled, first unicast message for encapsulating new two layers of head is encapsulated as at communication between plates head and two layer message
First communication between plates message of reason head PPH；The Dune exchange cable card board is sent by the first communication between plates message；Its
In, two layers PPH of the first communication between plates message carry the outgoing interface of the next-hop of first unicast message in institute
State the corresponding physical port mark of Dune exchange cable card board；
The Dune exchange cable card board receives the first communication between plates message, between the plate for removing the first communication between plates message
Head and two layers of PPH head are communicated, corresponding physical port transmission is identified by the physical port and encapsulates the first of new two layers of head
Unicast message.
2. the method according to claim 1, wherein the method also includes:
The Dune exchange cable card board receives the second unicast message for encapsulating two layers of head, finds second unicast message
The outgoing interface of next-hop is located at the flexible cable card board；Second unicast message for encapsulating two layers of head is encapsulated as with plate
Between communicate head and two layers PPH the second communication between plates messages；The second communication between plates message is sent to the flexible line card
Plate；
The flexible cable card board receives the second communication between plates message；Remove the communication between plates of the second communication between plates message
Head and two layers of PPH head；It is that second unicast message encapsulates new two layers of head according to the next-hop of second unicast message, will seals
The second unicast message for having filled new two layers of head is sent by the outgoing interface of the next-hop of second unicast message on this plate.
3. method according to claim 1 or 2, which is characterized in that first unicast message and the second unicast message
For one of following unicast message:
IPv4 unicast message, IPv6 unicast message, multiprotocol label switching MPLS VLL VLL unicast message, MPLS
Virtual Private LAN Service VPLS unicast message, MPLS Layer3 Virtual Private Network L3VPN unicast message, generic route encapsulation
GRE unicast message, virtual extended local area network VxLAN unicast message.
4. according to the method described in claim 2, it is characterized in that, the method also includes: the Dune exchange cable card board to
The flexible cable card board synchronizes the configuration information of the physical port of the Dune exchange cable card board, and the Dune exchange cable card board exists
The receiving port of second unicast message of two layers of head is encapsulated described in two layers of PPH setting of the second communication between plates message
Mark；
The flexible cable card board reads the mark of the receiving port；According to the configuration information inspection of the physical port of the synchronization
The receiving port enables the unicast forwarding of second unicast message.
5. the unicast message intercommunication equipment between a kind of Dune exchange cable card board and flexible cable card board, which is characterized in that the equipment packet
It includes:
Flexible cable card board: receiving the first unicast message for encapsulating two layers of head, finds going out for the next-hop of the first unicast message
Interface is located at Dune exchange cable card board；It is first unicast message encapsulation according to the next-hop of first unicast message
First unicast message for encapsulating new two layers of head is encapsulated as handling with communication between plates head and two layer message by new two layers of head
First communication between plates message of PPH, head；The Dune exchange cable card board is sent by the first communication between plates message；Its
In, two layers PPH of the first communication between plates message carry the outgoing interface of the next-hop of first unicast message in institute
State the corresponding physical port mark of Dune exchange cable card board；
Dune exchanges cable card board: receiving the first communication between plates message, leads between the plate of removal the first communication between plates message
Believe head and two layers of PPH head, the first list that corresponding physical port transmission encapsulates new two layers of head is identified by the physical port
Casting text.
6. equipment according to claim 5, which is characterized in that
Dune exchange cable card board is further used for, and receives the second unicast message for encapsulating two layers of head, finds described the
The outgoing interface of the next-hop of two unicast messages is located at the flexible cable card board；By second unicast message for encapsulating two layers of head
It is encapsulated as with communication between plates head and two layers PPH the second communication between plates messages；The second communication between plates message is sent to
The flexible cable card board；
The flexible cable card board is further used for, and receives the second communication between plates message；Remove the second communication between plates report
The communication between plates head and two layers of PPH head of text；It is second unicast message encapsulation according to the next-hop of second unicast message
New two layers of head will encapsulate the second unicast message of new two layers of head and be gone out by the next-hop of second unicast message on this plate
Interface is sent.
7. equipment according to claim 5 or 6, which is characterized in that first unicast message and the second unicast message
For one of following unicast message:
IPv4 unicast message, IPv6 unicast message, multiprotocol label switching MPLS VLL VLL unicast message, MPLS
Virtual Private LAN Service VPLS unicast message, MPLS Layer3 Virtual Private Network L3VPN unicast message, generic route encapsulation
GRE unicast message, virtual extended local area network VxLAN unicast message.
8. equipment according to claim 6, which is characterized in that
The Dune exchange cable card board is further used for, and the physics of the Dune exchange cable card board is synchronized to the flexible cable card board
The configuration information of port, and, the second communication between plates message two layers PPH setting described in encapsulate the second of two layers of head
The mark of the receiving port of unicast message；
The flexible cable card board is further used for, and reads the mark of the receiving port；According to the physical port of the synchronization
Configuration information checks that the receiving port enables the unicast forwarding of second unicast message.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309828.XA CN106302264B (en) | 2015-06-08 | 2015-06-08 | Dune exchanges the unicast message interoperability methods and device between cable card board and flexible cable card board |
| PCT/CN2016/085199 WO2016197933A2 (en) | 2015-06-08 | 2016-06-08 | Packet forwarding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510309828.XA CN106302264B (en) | 2015-06-08 | 2015-06-08 | Dune exchanges the unicast message interoperability methods and device between cable card board and flexible cable card board |
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| CN106302264A CN106302264A (en) | 2017-01-04 |
| CN106302264B true CN106302264B (en) | 2019-06-14 |
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| CN111817958B (en) * | 2020-06-10 | 2023-04-07 | 新华三信息安全技术有限公司 | Message forwarding method and network equipment |
| CN112235212B (en) * | 2020-09-11 | 2022-04-26 | 新华三信息安全技术有限公司 | Message forwarding method and programmable frame type switching equipment |
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2015
- 2015-06-08 CN CN201510309828.XA patent/CN106302264B/en active Active
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- 2016-06-08 WO PCT/CN2016/085199 patent/WO2016197933A2/en active Application Filing
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| Publication number | Publication date |
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| WO2016197933A3 (en) | 2017-02-09 |
| CN106302264A (en) | 2017-01-04 |
| WO2016197933A2 (en) | 2016-12-15 |
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