CN101087202A - A GPON system multicast method and device - Google Patents
A GPON system multicast method and device Download PDFInfo
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- CN101087202A CN101087202A CNA2007101079928A CN200710107992A CN101087202A CN 101087202 A CN101087202 A CN 101087202A CN A2007101079928 A CNA2007101079928 A CN A2007101079928A CN 200710107992 A CN200710107992 A CN 200710107992A CN 101087202 A CN101087202 A CN 101087202A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
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- General Engineering & Computer Science (AREA)
- Small-Scale Networks (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention relates to GPON system multicast method and device, said method includes: OLT completes the data reputation of target ONU of multicast cluster according to the multicast cluster corresponding with multicast; OLT encrypts said data according to corresponding method, and sends to said ONU; said ONU receives and deciphered said data; device includes receiving circuit of descending multicast data, searching circuit of multicast list, searching circuit of PORT-ID, and descending data transmission circuit, the receiving circuit of ascending IGMP protocol packet, BP searching circuit, BP enter/depart multicast circuit and the sending circuit of ascending data. The multicast method and device complete the multicast reputation at OLT, and encrypt the data for different ONU, and reinforces the security of multicast.
Description
Technical field
The present invention relates to Optical Transmission Network OTN, be specifically related to a kind of GPON system multicast method and device thereof.
Background technology
The EPON GPON of Gigabit-capable Gigabits per second speed, it is a kind of technology in the optical access network, constitute by optical line terminal OLT, Optical Distribution Network ODN and optical network unit ONU three parts, a kind of network architecture that between OLT and ONU, connects by passive optical distribution network ODN, as shown in Figure 1, business packet from OLT to ONU adopts broadcast transmission, the 12 bit Port-ID values that ONU carries according to each frame are filtered downlink frame, obtain one's own business packet selectively and abandon all the other incoherent packets; ONU uploads the professional OLT of giving distributing on the time slot of oneself burst.Therefore the GPON system in fact is the network configuration of an one-to-many.
The GPON system adopts Port-ID to identify miscellaneous service from different ONU in the OLT side, and Port-ID is used to provide 4096 different traffic stream identifier among the GPON, and is multiplexing to realize Business Stream.OLT sends to the downlink business of ONU and can realize encrypting by encryption device, to reach the networking security requirement, still for the business that is broadcast to all ONU, because the key difference of each ONU has no idea to send by the mode of data encryption.When realizing multicast, OLT filters out the multicast program that does not belong to this PON mouth according to the multicast filtering table of configuration, and the multicast program that will belong to this PON mouth then sends to all ONU by the mode of broadcasting, and finishes duplicating of multicast by ONU.
The multicast service of Shi Xianing in this manner, a plurality of ONU need receive same multicast traffic stream, therefore can not encrypt data stream, like this will cause the user at will to meet an ONU and just can receive all multicast services, can't satisfy the requirement of networking security.
Summary of the invention
The technical issues that need to address of the present invention provide a kind of GPON system multicast method and device thereof, can also carry out the encryption of OLT side to multi-cast business data.
Above-mentioned first technical problem of the present invention solves like this, and a kind of GPON system multicast method is provided, and may further comprise the steps:
1.1) OLT finishes this multicast group according to the corresponding multicast group of multicast packets and specify the data of purpose ONU to duplicate;
1.2) OLT encrypts described data, sends to described purpose ONU respectively by corresponded manner;
1.3) corresponding described purpose ONU receives and press corresponded manner and correctly decipher described data.
According to method of multicasting provided by the invention, described multicast group comprises that a multicast group indicates and a plurality of target ONU indicates.
According to method of multicasting provided by the invention, described multicast group indicates and can be made up of the target MAC (Media Access Control) address and the VLAN sign VLAN-ID of multicast packets.
According to method of multicasting provided by the invention, it can be bridge port BP that described ONU indicates; This method also comprises the corresponding relation of bridge port BP and ONU or ONU physics Ethernet interface.
According to method of multicasting provided by the invention, described multicast group can have one or more; Each multicast packets can only corresponding multicast group.
According to method of multicasting provided by the invention, described multicast group can send corresponding IGMP protocol package according to ONU and apply for adding or apply for leaving this multicast group.
According to method of multicasting provided by the invention, described corresponding IGMP protocol package comprises that multicast group indicates, target ONU indicates and application adds or the application departure motion.
According to method of multicasting provided by the invention, described multicast group indicates and can be made up of the target MAC (Media Access Control) address and the VLAN sign VLAN-ID of multicast packets; Described ONU indicates and comprises bridge port BP.
Above-mentioned another technical problem of the present invention solves like this, and a kind of GPON system multicast device is provided, and is arranged among the OLT, form by downstream module and uplink module, wherein:
Downstream module: comprise that the descending multicast packet receiving circuit, the multicast table that are electrically connected are successively searched circuit, PORT-ID searches circuit and downlink data transtation mission circuit;
Uplink module: comprise that the up IGMP protocol package receiving circuit, the BP that are electrically connected successively search circuit, BP adds/leave multicast group circuit and upstream data transtation mission circuit.
According to multicast apparatus provided by the invention, also comprise storage multicast table, the BP memory cell to PORT-ID mapping table and PORT-ID to the BP mapping table, described memory cell and described multicast table search that circuit, PORT-ID search that circuit, BP are searched circuit and BP adds/leaves the multicast group circuit and is electrically connected.
GPON system multicast method provided by the invention and device thereof, on OLT, finish the copy function of multicast packets, and carry out the encryption of multicast packets data at different ONU, strengthened the fail safe of multicast service, specifically promptly: by introducing the notion of bridge port BP, bridge port BP is corresponding one by one with the physics Ethernet interface of ONU or ONU, and set up the transmission channel sign Port-ID of GPON and the mapping relations between the bridge port BP according to certain rule, determine the bearer path of business in GPON based on bridge port, the multicast replication function is finished at OLT, and BP has only application to add corresponding multicast group just can receive the packet that OLT issues.The multicast service of Shi Xianing in this way, owing on OLT, finished duplicating of multicast, OLT can adopt the mode of enciphered data to be broadcast to ONU according to different ONU, like this have only the ONU that can correctly decipher just can receive multicast service, strengthen the fail safe of multicast service, overcome the shortcoming that multicast service can not be encrypted.
Description of drawings
Further the present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a GPON access network structural representation.
Fig. 2 is apparatus of the present invention structural representations.
Fig. 3 is a multicast service schematic diagram of the present invention.
Embodiment
At first, apparatus of the present invention are described:
Device of the present invention is on the OLT among Fig. 1.The up reception of mainly finishing the IGMP protocol package, BP searches and BP is added functions such as corresponding multicast group; Descending multicast packets according to reception is searched multicast table and is obtained BP, finishes the copy function of packet.
As Fig. 2, device of the present invention consists of the following components:
1, descending multicast packet receiving circuit;
2, multicast table is searched circuit;
3, Port-ID searches circuit;
4, downlink data transtation mission circuit;
5, up IGMP protocol package receiving circuit;
6, BP searches circuit;
7, BP adds/leaves the multicast group circuit;
8, upstream data transtation mission circuit;
9, memory cell, comprise multicast table, Port-ID to BP mapping table and BP to the Port-ID mapping table.
With regard to above each several part, divide both direction to describe its operation principle in detail below:
Up direction: up IGMP protocol package receiving circuit is finished the function that receives the IGMP protocol package from OLT MAC, after receiving the IGMP protocol package, (hardware is realized going up and is represented multicast group with the combination of MAC Address and Vlan-ID for Port-Id that carries in the extraction bag and multicast group information.MAC:MediaAccess Control medium access control, VLAN-ID:Virtual Local Area Network Identifier virtual local area network identifiers), and judge that this IGMP protocol package is that application adds or relevant multicast group is left in application, give BP with Port-ID and relevant information (comprising multicast group information and the action that application adds or application is left) then and search circuit, BP searches circuit and searches Port-ID according to Port-Id and obtain BP to the BP mapping table, give BP with BP number with relevant information and add/leave the multicast group circuit, BP adds/leaves the multicast group circuit and according to the action of carrying in the information this BP added or leave relevant multicast group, soon this BP writes multicast table or deletes from multicast table, after finishing aforesaid operations, can send multicast packet by upstream data transtation mission circuit notice multicast program.
Down direction: descending multicast packet receiving circuit is finished the reception of descending multicast packet, and multicast packets is delivered to multicast table search circuit, multicast table is searched the target MAC (Media Access Control) address and the Vlan-ID of circuit extraction multicast packets, search multicast table, obtain a plurality of BP that this multicast packets need be transmitted, Port-ID search circuit according to look into BP that multicast table obtains and certain mapping ruler (this mapping ruler can be in the multicast packets with fields such as priority, VLAN-ID, COS territory and ethernet type) search BP to the Port-ID mapping table, obtain Port-ID with the BP correspondence; The downlink data transtation mission circuit is finished duplicating of multicast packet according to the number of Port-ID, will duplicate back multicast packets and Port-ID and send to the OLT-MAC chip.
Apparatus of the present invention are supported 512 BP, and each BP can dispose maximum 8 Port-ID, finish mutual mapping between 4096 Port-ID and 512 BP to BP mapping table and BP to the Port-ID mapping table by Port-ID.
In second step, describe the concrete implementation step of the inventive method in detail:
Suppose that ONU1 has disposed a PortID-1 as multicast service, ONU2 has disposed a PortID-2 as multicast service, and PortID-3 is as other business, as online or voice etc., it is corresponding one by one that BP and ONU are set here, the corresponding ONU1 of BP-1, the corresponding ONU2 of BP-2 is shown in table 1 (Port-ID is to the BP mapping table), the degree of depth of table 1 is 4096, make index with Port-ID, width is 9, and the content of depositing is BP.There is a multicast group A in system, and hardware is realized going up and represented multicast group A with MAC-a and VID-x.
| Port-ID | Bridge port BP |
| PortID-1 | BP-1 |
| PortID-2 | BP-2 |
| PortID-3 | BP-2 |
| ...... | ...... |
| PortID-4096 | BP-n |
Table 1 Port-ID is to the BP mapping table
The first step, ONU1 and ONU2 ask to add multicast group A respectively, and ONU1 and ONU2 send out the IGMP bag that Fa Qi not add multicast group A;
Second step, after this device receives the request of ONU1 and ONU2 adding multicast group A, at first in multicast table, create multicast group A, and search Port-ID to the BP mapping table according to the PortID-1 and the PortID-2 of IGMP band, as shown in table 1, obtain BP-1 and BP-2, and BP-1 and BP-2 are written in the BP tabulation of multicast group A correspondence, shown in table 2 and table 3, notify multicast program to send descending multicast packet then;
| MAC Address | VLAN-ID | The bridge port index |
| MAC-a | VID-x | BP-Index |
Table 2 multicast table
| The pointer of next BP | The pointer of next BP |
| Pointer-1 | BP-1 |
| Pointer-2 | BP-2 |
| Pointer-n | BP-n |
Table 3 BP tabulation
The 3rd step, after this device receives descending multicast packet, extract target MAC (Media Access Control) address and Vlan-ID and search multicast table, if mate with MAC-a that disposes and VID-x, then search the BP tabulation, obtain BP-1 and BP-2 that this multicast packet need be transmitted according to the BP-Index in the table;
The 4th step, according to BP-1 that obtains and BP-2, and the priority 802.1p value of extracting in the bag, look-up table 4, BP obtain and the corresponding PortID-1 of BP-1, BP-2, PonID-2 to the Port-ID mapping table; The degree of depth of table 4 is 512, and as index, each clauses and subclauses comprises 8 Port-ID with BP, and according to 802.1p, fields such as VLAN-ID, COS territory and ethernet type are index;
| Bridge port BP | 802.1P value | Port-ID |
| BP-1 | 1 | PortID-1 |
| 2 | PortID-1 | |
| ...... | ...... | |
| BP-2 | 1 | PortID-2 |
| 2 | PortID-3 | |
| ...... | ...... | |
| ...... | ||
| BP-512 | 1 | PortID- |
| 2 | PortID-m | |
| ...... | ...... | |
Table 4 BP is to the Port-ID mapping table
The 5th the step, with multicast packet duplicate two parts stamp PortID-1 respectively, PonID-2 sends.
By device of the present invention, OLT can carry out the encryption of multicast packets data at different ONU, has strengthened the fail safe of multicast packet.
Claims (10)
1, a kind of GPON system multicast method is characterized in that, may further comprise the steps:
1.1) OLT finishes this multicast group according to the corresponding multicast group of multicast packets and specify the data of purpose ONU to duplicate;
1.2) OLT encrypts described data, sends to described purpose ONU respectively by corresponded manner;
1.3) corresponding described purpose ONU receives and press corresponded manner and correctly decipher described data.
According to the described method of multicasting of claim 1, it is characterized in that 2, described multicast group comprises that a multicast group indicates and a plurality of target ONU indicates.
According to the described method of multicasting of claim 2, it is characterized in that 3, described multicast group indicates and can be made up of the target MAC (Media Access Control) address and the VLAN sign VLAN-ID of multicast packets.
According to the described method of multicasting of claim 2, it is characterized in that 4, it can be bridge port BP that described ONU indicates; This method also comprises the corresponding relation of bridge port BP and ONU or ONU physics Ethernet interface.
According to the described method of multicasting of claim 1, it is characterized in that 5, described multicast group can have one or more.
According to the described method of multicasting of claim 1, it is characterized in that 6, described multicast group can send corresponding IGMP protocol package according to ONU and apply for adding or apply for leaving this multicast group.
According to the described method of multicasting of claim 6, it is characterized in that 7, described corresponding IGMP protocol package comprises that multicast group indicates, target ONU indicates and application adds or the application departure motion.
According to the described method of multicasting of claim 7, it is characterized in that 8, described multicast group indicates and can be made up of the target MAC (Media Access Control) address and the VLAN sign VLAN-ID of multicast packets; Described ONU indicates and comprises bridge port BP.
9, a kind of GPON system multicast device is characterized in that, is arranged among the OLT, form by downstream module and uplink module, wherein:
Downstream module: comprise that the descending multicast packet receiving circuit, the multicast table that are electrically connected are successively searched circuit, PORT-ID searches circuit and downlink data transtation mission circuit;
Uplink module: comprise that the up IGMP protocol package receiving circuit, the BP that are electrically connected successively search circuit, BP adds/leave multicast group circuit and upstream data transtation mission circuit.
10, according to the described multicast apparatus of claim 1, it is characterized in that, also comprise storage multicast table, the BP memory cell to PORT-ID mapping table and PORT-ID to the BP mapping table, described memory cell and described multicast table search that circuit, PORT-ID search that circuit, BP are searched circuit and BP adds/leaves the multicast group circuit and is electrically connected.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101079928A CN100550758C (en) | 2007-05-22 | 2007-05-22 | A kind of GPON system multicast method and device thereof |
| PCT/CN2007/003938 WO2008141505A1 (en) | 2007-05-22 | 2007-12-29 | Multicast method and its device for gigabit passive optical network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101079928A CN100550758C (en) | 2007-05-22 | 2007-05-22 | A kind of GPON system multicast method and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101087202A true CN101087202A (en) | 2007-12-12 |
| CN100550758C CN100550758C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101079928A Expired - Fee Related CN100550758C (en) | 2007-05-22 | 2007-05-22 | A kind of GPON system multicast method and device thereof |
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|---|---|
| CN (1) | CN100550758C (en) |
| WO (1) | WO2008141505A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141505A1 (en) * | 2007-05-22 | 2008-11-27 | Zte Corporation | Multicast method and its device for gigabit passive optical network system |
| CN101951323A (en) * | 2010-08-12 | 2011-01-19 | 上海市共进通信技术有限公司 | Device and method for realizing uplink multicast in Gigabit passive optical network |
| CN101998188A (en) * | 2009-08-27 | 2011-03-30 | 中兴通讯股份有限公司 | Encryption/decryption method and system for passive optical network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005197947A (en) * | 2004-01-06 | 2005-07-21 | Mitsubishi Electric Corp | Terminal station device and terminating device |
| CN1855834A (en) * | 2005-04-20 | 2006-11-01 | 华为技术有限公司 | Method for multicast via passive optical network |
| CN1953367A (en) * | 2005-10-17 | 2007-04-25 | 中兴通讯股份有限公司 | A method for enciphering control of multicast service in Ethernet passive optical network |
| CN100550758C (en) * | 2007-05-22 | 2009-10-14 | 中兴通讯股份有限公司 | A kind of GPON system multicast method and device thereof |
-
2007
- 2007-05-22 CN CNB2007101079928A patent/CN100550758C/en not_active Expired - Fee Related
- 2007-12-29 WO PCT/CN2007/003938 patent/WO2008141505A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141505A1 (en) * | 2007-05-22 | 2008-11-27 | Zte Corporation | Multicast method and its device for gigabit passive optical network system |
| CN101998188A (en) * | 2009-08-27 | 2011-03-30 | 中兴通讯股份有限公司 | Encryption/decryption method and system for passive optical network |
| CN101951323A (en) * | 2010-08-12 | 2011-01-19 | 上海市共进通信技术有限公司 | Device and method for realizing uplink multicast in Gigabit passive optical network |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008141505A1 (en) | 2008-11-27 |
| CN100550758C (en) | 2009-10-14 |
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