CN101808256A - Passive optical network system with multicast authentication and control functions and implementing method thereof - Google Patents
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Abstract
The invention discloses a passive optical network system with multicast authentication and control functions and an implementing method thereof. In the method, an ONU monitors the interaction between a multicast service terminal and a BRAS to acquire a user name and multicast authority of the multicast service terminal; and a multicast forwarding table is set on the basis; multicast messages are filtered according to the multicast forwarding table; and an OLT bypasses all multicast messages and processes the multicast messages on a master control panel by adopting a multicast protocol, so that the multicast user authentication and control of the passive optical network system are realized.
Description
Technical field
The present invention relates to passive optical network, be specifically related to have passive optical network and its implementation of multicast authentication and controlled function.
Background technology
BRAS (Broadband Remote Access Server, broad band remote access service equipment).
Along with the fast development of the communication technology, the broadband access network business becomes the most noticeable business in the telecommunication service.In numerous broadband access network business, multicast (Multicast) business is particularly important.The emerging broadband services that with the multicast is representative all needs bigger bandwidth, less forwarding time delay, and this has just proposed higher and faster demand to existing communication network.Since early stage for the greatly developing of backbone transport networks, Access Network becomes the bottleneck of whole communication network.Existing access technology, comprise digital subscriber line (DigitalSubscriber Line, be called for short DSL) insert and the Ethernet access, because the access speed of DSL circuit is along with the increase of distance descends very fast, when broadband services surpasses access speed, for business carry out the very big obstacle of formation, and insert for Ethernet, because the distance of Ethernet switch is shorter, coverage is very restricted.In order to solve the bottleneck problem of Access Network, press for new access technology.
Along with the development of optical transport technology, EPON (Passive Optical Network is called for short PON) technology is applied in the access technology gradually, and this technology mainly contains following several characteristics:
1. the structure of point-to-multipoint
2. descending employing broadcast mode
3. high bandwidth
As a kind of new access technology, the bandwidth that it provided can adapt to now and in 10 years in the future the user to the demand of bandwidth.This technology both can have been used the ONU of SFU type, also can use simultaneously the ONU of MDU type, original DSL subscriber's cable also can by with original access device as a node connecting system, thereby existing twisted-pair feeder resource is fully utilized.EPON can solve the present network bottleneck problem of Access Network, is the direction of access technology development.
In passive optical network technique, its down direction is broadcasted, and this is very favorable for the developing multicast business.In present multicast implementation, set up special multicast transmission passage to ONU (Optical Network Unit, optical network unit are called for short ONU) from OLT (Optical Line Terminal, optical line terminal are called for short OLT).OLT obtains the group broadcasting program that the user asks by analyzing the multicast protocol message from user side.The multicast data flow that OLT gets access to oneself sends to each descending PON light mouth.ONU receives after the multicast data flow, and it is forwarded to the corresponding registered permanent residence of using, and realizes multicast service.
In present multicast scheme, the authentication of multicast and control become a problem demanding prompt solution, and this is that traditional multicast protocol does not have the authentification of user function because of the multicast authentication difficulty, and the user can arbitrarily add and leave; Service billing difficulty, multicast protocol do not relate to the charging problem, and operator can't learn when the user adds and when leave, and how many users also can't add up certain time has watching group broadcasting program on earth, can't accurate billing.Adding the multicast user is point-to-multipoint, after the multi-cast business data of an authenticated user issues, unauthorized user only need send with the corresponding multicast protocol message of this multi-cast business data can directly accept this multicast service at lower floor's access device, has very big potential safety hazard.Just because of above-mentioned reason, the a large amount of multicast authentication control methods that adopt of operator are by BRAS (Broadband Remote AccessServer, BAS Broadband Access Server) adopt PPPOE to authenticate, this method has solved the problem that authentification of user disperses very much, but begin multicast service in the Access Network side and be actually the transmission of use mode of unicast, the advantage that the multicast mode is saved bandwidth can't obtain performance, the bottleneck problem of also having aggravated Access Network simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to solve the problem that present passive optical network access equipment is realized multicast authentication and control difficulty.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention provides the method that a kind of passive optical network is realized multicast authentication and control, may further comprise the steps:
A, each multicast service terminal inserts message to the BRAS request of sending respectively, this request inserts the username and password that includes the multicast service terminal in the message, BRAS receives after above-mentioned request inserts message and verifies respectively whether the username and password of each multicast service terminal is correct, correct as username and password, then reply acknowledgement frame to this multicast service terminal, and issue electric program menu with acknowledgement frame, the multicast authority that promptly includes multicast group IP address list and this multicast service terminal in this acknowledgement frame, a program channel in the corresponding electric program menu in each IP address in the described multicast group IP address list is used for accepting in view of the above the program stream of this channel; Incorrect as username and password, then abandon this request and insert message, do not do any response;
B, ONU intercept multicast service terminal on each multicast port and the interactive information of BRAS, obtain the user name and the multicast authority of the multicast service terminal on this multicast port according to above-mentioned interactive information, and the multicast authority template of each multicast port is set according to above-mentioned user name and the multicast limit of delegating power;
The type of message that C, ONU receive according to each multicast port is safeguarded multicast forward table by IGMP Snooping agreement, and the different messages of receiving are handled respectively, and the list item of described multicast forward table comprises multicast port, multicast address and M-VLAN;
D, OLT main control unit adopt IGMP proxy multicast protocol that multicast message is handled, promptly by safeguarding that multicast forward table duplicates multi-cast business data and distributes;
E, BRAS step by step deliver to each multicast service terminal according to multicast forward table through OLT and ONU with multi-cast business data.
In the said method, step C may further comprise the steps:
If ONU receives is multicast that the multicast service terminal the is sent message that joins request, whether the authority of then verifying this multicast service terminal satisfies the authority of setting in the multicast authority template, if satisfy, then in the multicast forward table of ONU, increase a list item, multicast port is to receive the join request port of message of multicast, multicast address is join request MAC Address after the entrained multicast group IP address spaces of message of this multicast, M-VLAN is the M-VLAN that office's square gauge is drawn, and this multicast is joined request message transmission to the OLT ply-yarn drill; If do not satisfy, then abandon this multicast message that joins request;
If what ONU received is the leave message that the multicast service terminal is sent, then in current multicast forward table, search the multicast list of corresponding port, if find this list item, then open a last membership query timer of group immediately, then upwards transmit this leave message.Asking joins message responds if timer expiry, this multicast port do not have, then the list item at this multicast port place of deletion in multicast forward table; Join message if receive the request of this multicast port before overtime, then the list item at this multicast port place is not carried out any operation;
When ONU receive be the query message of OLT the time, then it is forwarded to all multicast port of this ONU.
The present invention also provides a kind of passive optical network with multicast authentication and controlled function, comprise BRAS, OLT, some ONU and the some multicast service terminals that are connected on each ONU, described BRAS, be used for verifying whether the username and password of each multicast service terminal access request message is correct, reply acknowledgement frame by the back to this multicast service terminal in checking, and issue electric program menu with acknowledgement frame, be to include multicast group IP address list and the needed multicast parameters configuration information of this multicast service terminal in the acknowledgement frame, wherein, a program channel in the corresponding electric program menu in each IP address in the multicast group IP address list, can accept the program stream of this program channel in view of the above, the multicast parameters configuration information comprises the multicast authority of correspondence table and this multicast service terminal of program channel and multicast group IP address list;
Described ONU is provided with and intercepts module, IGMP Snooping module and message processing module (MPM), intercept module and intercept multicast service terminal on its each port and the interactive information of BRAS, obtain user name and the multicast authority of each multicast service terminal on this port according to above-mentioned interactive information, and the multicast authority template of each user port is set according to above-mentioned user name and multicast authority; IGMP Snooping module is provided with, safeguards a multicast forward table, and transmit data according to multicast forward table to OLT and each multicast service terminal according to the type of message of receiving, the list item of described multicast forward table comprises multicast port, multicast address and M-VLAN; Message processing module (MPM) calls according to each port type of message of receiving that IGMP Snooping resume module multicast joins message, leave message, and the query message of OLT is forwarded to all multicast port of this ONU;
Described OLT is provided with IGMP proxy module, and this IGMP proxy module is duplicated data according to multicast forward table the message of receiving and distributed.
The present invention, on the OLT of passive optical network, move igmp proxy, on the ONU of EPON, move IGMP snooping and multicast template filtering function module then, so this system had both possessed the agency and the convergence capabilities of multicast agent, also have the characteristics of intercepting with the contour performance of transparent transmission simultaneously, and realized the multicast authentication and the controlled function of system.
Description of drawings
Fig. 1 is a kind of embodiment schematic diagram with passive optical network of multicast authentication and controlled function provided by the invention;
Fig. 2 is the another kind of embodiment schematic diagram with passive optical network of multicast authentication and controlled function provided by the invention;
Fig. 3 realizes the method flow diagram of multicast authentication and control for passive optical network access equipment of the present invention.
Embodiment
The object of the present invention is to provide a kind of passive optical network to realize multicast authentication and the method for control and the passive optical network that uses this method, so that make full use of the passive optical network bandwidth in actual use, be that example is illustrated with two multicast service terminals below, for a plurality of multicast service terminals, its implementation is identical, in the entire process flow process, the regulation of multicast protocol relevant criterion is followed in the processing strictness of all multicast protocol messages.
Fig. 3 is the flow chart that passive optical network provided by the invention is realized multicast authentication and control method, in this flow process, multicast service terminal 1 is by authorizing the mutual of developing multicast business, multicast service terminal 2 is failed by authorizing, therefore, the multicast protocol message that multicast service terminal 2 is sent is tackled by ONU, and detailed step is as follows:
A, multicast service terminal 1 (IP:192.168.0.101) and multicast service terminal 2 (IP:192.168.0.102) are initiated the PPPoE request to BRAS (IP:192.168.0.1) respectively, include the username and password of multicast service terminal separately in the PPPoE request separately, BRAS receives after above-mentioned PPPoE request inserts message and verifies respectively whether the username and password of each multicast service terminal is correct, correct as username and password, then reply the PPPoE acknowledgement frame to this multicast service terminal, and issue electric program menu with this PPPoE acknowledgement frame, be to include multicast group IP address list and the needed multicast parameters configuration information of this multicast service terminal in the PPPoE acknowledgement frame, wherein, a program channel in the corresponding electric program menu in each IP address in the multicast group IP address list, can accept the program stream of this program channel in view of the above, the multicast parameters configuration information comprises the correspondence table and the multicast authority of program channel and multicast group IP address list, username and password as the multicast service terminal is incorrect, then abandon this message, and this multicast service terminal is set for forbidding the user, stop on its multicast message and send.Include channel CCTV-1 in the multicast group IP address list that multicast service terminal 1 gets access to by the PPPoE acknowledgement frame in this example, the multicast group address of CCTV-1 is 225.1.1.1, and the multicast authority of multicast service terminal 1 is for allowing visit CCTV-1 channel; Do not have program channel CCTV-1 in the multicast group IP address list that multicast service terminal 2 gets access to by the PPPoE acknowledgement frame, the multicast group address of CCTV-1 is 225.1.1.1, and the multicast authority of multicast service terminal 2 is not for allowing to visit the CCTV-1 channel.B, ONU intercept the PPPoE interactive information of multicast service terminal 1 on its port and multicast service terminal 2 and BRAS, obtain the user name and the multicast authority of the multicast service terminal on this port according to the PPPoE interactive information, and the multicast authority template of each multicast port is set according to above-mentioned user name and the multicast limit of delegating power;
C, ONU handle respectively according to the type of message that each port is received.
When the multicast that receives multicast service terminal 1 when the port at multicast service terminal 1 place joins request message, whether the multicast authority of verifying this multicast service terminal satisfies the authority of setting in the multicast authority template, because the multicast authority of multicast service terminal 1 is for allowing visit CCTV-1 channel, therefore, in the multicast forward table of ONU, increase a list item, multicast port is the port that the request of receiving joins message, multicast address is the MAC Address after the multicast group IP address spaces of asking to join message entrained, concrete conversion gets final product with reference to the MAC mapping relations of ICP/IP protocol D class address, can check ICP/IP protocol, no longer describe in detail herein, M-VLAN is office's M-VLAN of drawing of square gauge, and this request joined message is transparent to the OLT ply-yarn drill; When the multicast that the port at multicast service terminal 2 places receives multicast service terminal 2 joins request message, whether the multicast authority of verifying this multicast service terminal satisfies the authority of setting in the multicast authority template, because the multicast authority of multicast service terminal 2 is not for allowing to visit the CCTV-1 channel, therefore, ONU verifies that it haves no right to watch this program, the multicast that abandons multicast service terminal 2 message that joins request, and on send multicast service terminal 2 to add the information of failure.
When the port at multicast service terminal 1 place receives the leave message that multicast service terminal 1 sends, in current multicast forward table, search the multicast list of corresponding port, if find this list item, then open a last membership query timer of group immediately, wait for the group ad hoc inquiry that the OLT main control unit sends, asking joins message responds if timer expiry, this multicast port do not have, then the list item at this multicast port place of deletion in multicast forward table; Join message if receive the request of this multicast port before overtime, then the list item at this multicast port place is not carried out any operation, simultaneously this leave message is transparent to the OLT ply-yarn drill;
If ONU receives when being the query message of OLT, then it is forwarded to all multicast port of this ONU.
D, OLT main control unit adopt IGMP proxy multicast protocol that multicast message is handled, and promptly by safeguarding that multicast address is transmitted data are duplicated and are distributed, and the list item that this multicast address is transmitted comprises multicast port, multicast address and M-VLAN;
E, BRAS, to multicast server request corresponding business stream and issue according to the multicast member message of receiving; Group business stream is transmitted passage along setting up good multicast address, by OLT, ONU, delivers to the multicast service terminal step by step.In this example, final multicast service terminal 1 has received the group business stream of CCTV-1.
According to above analysis, adopt said method, passive optical network just can be passed to multicast service user terminal 1, and stops user 2 to use multicast service.
In the said method, ONU and OLT all have member's aging mechanism, do not receive above ageing time when certain port to join message, with the deletion from multicast address is transmitted of this port.The module of operation igmp proxy also has member's aging mechanism on the main control unit, do not receive and join message when certain port surpasses ageing time, with this port from the multicast address list deletion.
The passive optical network with multicast authentication and controlled function that the present invention also provides has two kinds of embodiment, and Fig. 1 is first kind of embodiment schematic diagram of this system.Among this embodiment, the type of ONU is SFU (Single Family Unit, the household unit of living alone, be called for short SFU) type ONU, each multicast service terminal is monopolized an ONU and is commenced business, and at this moment, ONU intercepts mutual between this multicast service terminal and the BRAS, the multicast template rights of this multicast service terminal is set, thereby the multicast service of this multicast service terminal is managed and controls.
Fig. 2 is the another kind of embodiment schematic diagram with passive optical network of multicast authentication and controlled function.ONU type in this system is MDU (Multi.Dwelling Unit, multitenant unit, be called for short MDU) type ONU, on specific implementation, can be DSL type ONU, also can be LAN type ONU, have a plurality of multicast service terminals under the ONU this moment, ONU intercepts mutual between each multicast service terminal and the BRAS, for each multicast service terminal is provided with the multicast authority template, thereby realizes management and control to multicast service.
In conjunction with Fig. 1 and Fig. 2, the passive optical network with multicast authentication and controlled function comprises BRAS, OLT, some ONU and is connected some service terminals on each ONU.Whether the username and password that each multicast service terminal of verifying BRAS inserts in the request message is correct, reply acknowledgement frame by the back to this multicast service terminal in checking, and issue electric program menu with acknowledgement frame, be to include multicast group IP address list and the needed multicast parameters configuration information of this multicast service terminal in the acknowledgement frame, wherein, a program channel in the corresponding electric program menu in each IP address in the multicast group IP address list, can accept the program stream of this program channel in view of the above, the multicast parameters configuration information comprises the multicast authority of correspondence table and this multicast service terminal of program channel and multicast group IP address list.ONU is provided with and intercepts module, IGMPSnooping module and message processing module (MPM), intercept module and intercept multicast service terminal on its each port and the interactive information of BRAS, obtain user name and the multicast authority of each multicast service terminal on this port according to above-mentioned interactive information, and the multicast authority template of each port is set according to above-mentioned user name and the multicast limit of delegating power; The setting of IGMP Snooping module, multicast address of maintenance are transmitted, and transmit to OLT and each multicast service terminal forwarding data according to multicast address, and the list item that described multicast address is transmitted comprises multicast port, multicast address and M-VLAN.Message processing module (MPM) is carried out following processing respectively according to each port type of message of receiving:
When the multicast that receives this multicast service terminal when the ONU port at multicast service terminal place joins request message, whether the multicast authority of verifying this multicast service terminal satisfies the authority of setting in the multicast authority template, when the multicast authority of multicast service terminal is permission, call IGMP Snooping module and in the multicast address of ONU is transmitted, increase a list item, multicast port is the port that the request of receiving joins message, multicast address is the MAC Address after the multicast group IP address spaces of asking to join message entrained, M-VLAN is office's M-VLAN of drawing of square gauge, and this request joined message is transparent to the OLT ply-yarn drill; When the multicast authority of multicast service terminal when not allowing to visit, the multicast that then abandons the multicast service terminal message that joins request, and on give this multicast service terminal to add the information of failure.
When the ONU port at multicast service terminal place receives the leave message that this multicast service terminal sends, call IGMP Snooping module and in current multicast address is transmitted, search the multicast list of corresponding port, if find this list item, then open a last membership query timer of group immediately, wait for the group ad hoc inquiry that the OLT main control unit sends, if timer expiry, this multicast port does not have request and joins message and respond, and then deletes the list item at this multicast port place in multicast address is transmitted; Join message if receive the request of this multicast port before overtime, then the list item at this multicast port place is not carried out any operation, simultaneously this leave message is transparent to the OLT ply-yarn drill;
When receive be the query message of OLT the time, then it is forwarded to all multicast port of this ONU.
OLT is provided with IGMP proxy module, and this IGMP proxy module is transmitted according to multicast address the message received data are duplicated and distributed.
Also can adopt the DHCP agreement to realize the mutual of multicast service terminal and BRAS among the present invention, concrete implementation method and foregoing description are similar, repeat no more.
The present invention is not limited to above-mentioned preferred forms, and anyone should learn that the simple structure of making changes or modification under enlightenment of the present invention, and every have identical or close technical scheme with the present invention, all falls within protection scope of the present invention.
Claims (3)
1. passive optical network is realized the method for multicast authentication and control, it is characterized in that may further comprise the steps:
A, each multicast service terminal inserts message to the BRAS request of sending respectively, this request inserts the username and password that includes the multicast service terminal in the message, BRAS receives after above-mentioned request inserts message and verifies respectively whether the username and password of each multicast service terminal is correct, correct as username and password, then reply acknowledgement frame to this multicast service terminal, and issue electric program menu with acknowledgement frame, the multicast authority that promptly includes multicast group IP address list and this multicast service terminal in this acknowledgement frame, a program channel in the corresponding electric program menu in each IP address in the described multicast group IP address list is used for accepting in view of the above the program stream of this channel; Incorrect as username and password, then abandon this message, and this user is set for forbidding the user, stop on its multicast message and send;
B, ONU intercept multicast service terminal on each multicast port and the interactive information of BRAS, obtain the user name and the multicast authority of the multicast service terminal on this multicast port according to above-mentioned interactive information, and the multicast authority template of each multicast port is set according to above-mentioned user name and the multicast limit of delegating power;
The type of message that C, ONU receive according to each multicast port is safeguarded multicast forward table by IGMP Snooping agreement, and the different messages of receiving are handled respectively, and the list item of described multicast forward table comprises multicast port, multicast address and M-VLAN;
D, OLT main control unit adopt IGMP proxy multicast protocol that multicast message is handled, promptly by safeguarding that multicast forward table duplicates multi-cast business data and distributes;
E, BRAS step by step deliver to each multicast service terminal according to multicast forward table through OLT and ONU with multi-cast business data.
2. passive optical network as claimed in claim 1 is realized the method for multicast authentication and control, it is characterized in that in step C:
If ONU receives is multicast that the multicast service terminal the is sent message that joins request, whether the authority of then verifying this multicast service terminal satisfies the authority of setting in the multicast authority template, if satisfy, then in the multicast forward table of ONU, increase a list item, multicast port is to receive the join request port of message of multicast, multicast address is join request MAC Address after the entrained multicast group IP address spaces of message of this multicast, M-VLAN is the M-VLAN that office's square gauge is drawn, and this multicast is joined request message transmission to the OLT ply-yarn drill; If do not satisfy, then abandon this multicast message that joins request;
If what ONU received is the leave message that the multicast service terminal is sent, then in current multicast forward table, search the multicast list of corresponding port, if find this list item, then open a last membership query timer of group immediately, wait for the group ad hoc inquiry that the OLT main control unit sends, asking joins message responds if timer expiry, this multicast port do not have, then the list item at this multicast port place of deletion in multicast forward table; Join message if receive the request of this multicast port before overtime, then the list item at this multicast port place is not carried out any operation, simultaneously this leave message is transparent to ply-yarn drill;
When ONU receive be the query message of OLT the time, then it is forwarded to all multicast port of this ONU.
3. the passive optical network that has multicast authentication and controlled function comprises BRAS, OLT, some ONU and is connected some multicast service terminals on each ONU, it is characterized in that,
Described BRAS, be used for verifying whether the username and password of each multicast service terminal access request message is correct, reply acknowledgement frame by the back to this multicast service terminal in checking, and issue electric program menu with acknowledgement frame, be to include multicast group IP address list and the needed multicast parameters configuration information of this multicast service terminal in the acknowledgement frame, wherein, a program channel in the corresponding electric program menu in each IP address in the multicast group IP address list, can accept the program stream of this program channel in view of the above, the multicast parameters configuration information comprises the multicast authority of correspondence table and this multicast service terminal of program channel and multicast group IP address list;
Described ONU is provided with and intercepts module, IGMP Snooping module and message processing module (MPM), intercept module and intercept multicast service terminal on its each port and the interactive information of BRAS, obtain user name and the multicast authority of each multicast service terminal on this port according to above-mentioned interactive information, and the multicast authority template of each port is set according to above-mentioned user name and the multicast limit of delegating power; IGMP Snooping module is provided with, safeguards a multicast forward table, and transmit data according to multicast forward table to OLT and each multicast service terminal according to the type of message of receiving, the list item of described multicast forward table comprises multicast port, multicast address and M-VLAN; Message processing module (MPM) is called all multicast port that IGMP Snooping resume module multicast joins message, leave message is forwarded to the query message of OLT this ONU according to each port type of message of receiving;
Described OLT is provided with IGMP proxy module, and this IGMP proxy module is duplicated data according to multicast forward table the message of receiving and distributed.
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| CN105591764A (en) * | 2015-12-18 | 2016-05-18 | 杭州华三通信技术有限公司 | Method and device for synchronizing multicast forwarding table items |
| CN105591764B (en) * | 2015-12-18 | 2018-12-11 | 新华三技术有限公司 | Multicast forwarding list item synchronous method and device |
| CN109039675A (en) * | 2018-09-26 | 2018-12-18 | 盛科网络（苏州）有限公司 | Member based on IGMPv2 agreement leaves management method and system |
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| CN110138796B (en) * | 2019-05-24 | 2022-03-01 | 新华三技术有限公司 | Multicast control method and device |
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