CN101594243B - Method for realizing multicast spanning virtual local area networks based on optical network unit - Google Patents
Method for realizing multicast spanning virtual local area networks based on optical network unit Download PDFInfo
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Abstract
The invention discloses a method for realizing multicast spanning virtual local area networks based on an optical network unit, which comprises that: a home gateway is provided with a first virtual local area network for interactive network television service to use; the optical network unit and an optical line terminal are allocated with a second virtual local area network for multicast service to use; and the home gateway sends a multicast request message to the optical network unit, a user port of the optical network unit analyzes the information of the first virtual local area network, a mapping relation from first virtual local area network identification to second virtual local area network identification under the user port is established, when a downlink multicast data stream or a downlink multicast query protocol message reaches the user port of the optical network unit, the second virtual network identification in the multicast data stream or the multicast query protocol message is replaced by the first virtual local area network identification, and the multicast data stream or the multicast query protocol message is sent to the home gateway sending the multicast request message through the user port. The method realizes data distribution of the multicast spanning the virtual local area networks.
Description
Technical field
The present invention relates to the communication multicasting technology, relate in particular to and stride vlan (Virtual Local Area Network, VLAN) method of realizing group broadcasting in the broadband access network that contains family gateway equipment.
Background technology
Home gateway is a very important part in the current telecom operators market strategy, and it has entrusted to the care of the hope that current telecom operators change to the multi-service service provider from traditional single network provider.Telecom operators have defined more detailed standard to home gateway, as require home gateway to support middleware; Requirement is supported storage and is supported that shooting is first-class, makes it really become a network terminal main frame on home gateway.Should say, on function, will become more and more complicated with the software home gateway.
Along with the large-scale application of home gateway and IPTV (IPTV) technology, how the developing multicast business becomes a problem that is worth research in containing the broadband access network of family gateway equipment in recent years.
Existing multicast service adopts the single copy broadcast mode, multicast service distribution control point is arranged on the ONU (optical network unit), at OLT (optical line termination, the multicast authority table is set so that multicast is carried out control of authority optical line terminal), and reaches the purpose of filtering illegal multicast packet by the multicast filtering list item that is provided with in the ONU equipment.For the ONU equipment of multi-user's port, realize the purpose that multicast service is only transmitted to the requesting users port by IGMP (Internet Group Management Protocol) study (snooping) function.Multicast service model supports multicast virtual local area network (MVLAN).ONU and OLT go up the Virtual Local Area Network of dividing the multicast special use, it is isolated to be that multicast service uses one or more VLAN that is exclusively used in multicast service to realize with other business, a corresponding multicast channel of MVLAN or a channel-group (referring to the set of the multicast channel of an authority unified management).A multicast channel only belongs to a specific MVLAN.The group business stream that transmits in the single copy broadcast channel all has MVLAN sign (tag).Other data flow of user comprises that unicast service and up IGMP (Internet GroupMessage Protocol, IGMP) message etc. put under among the other clean culture VLAN.This has just caused such situation: descending group business stream can only be transmitted to MVLAN; And for the professional VLAN (CVLAN) that is used for User IP TV on the home gateway, group business stream can not be transmitted to it.
For example, when ONU is receiving the IGMP adding multicast message that multicast address is 224.1.2.3 on a certain user port after, transmit by existing snooping mechanism study foundation by two layers of exchange, this port information of record, multicast mac address and multicast virtual local area network sign (MVID) in transmitting, ONU is transmitted to OLT with this IGMP adding multicast message simultaneously.OLT has tackled whole IGMP requests that the multicast application terminal upwards sends and has gone forward side by side after line correlation handles, again it is transmitted to the upper strata multicast router, and set up the corresponding relation (also being a multicast forward table) of group membership and PON (Passive Optical Network, EPON) interface.Simultaneously, OLT is according to this multicast forward table forwarding multicasting Business Stream on each PON interface; ONU is according to its multicast forward table forwarding multicasting Business Stream on each user port, and all has MVLAN tag.In the family gateway equipment of under the ONU user port, hanging, use professional VLAN ID (CVID) to distinguish its type of service, represent HSI, IPTV, VoIP and telemanagement respectively such as VID 101,102,103,104, like this, because it is inequality to be used for the CVLAN of IPTV business on the MVLAN of multicast special use and the home gateway, descending group business stream just can not normally be forwarded on the home gateway.
As seen, existing multicast service implementation method can't be carried out normal multicast packet stream distribution at the scene of hanging home gateway under the ONU user port, causes the user under the home gateway can't receive multicast traffic stream like this.
Summary of the invention
Technical problem to be solved by this invention provides a kind of multicast spanning virtual local area networks implementation method based on optical network unit, the vlan multicast of striding that is applied to the home gateway scene is realized, can hang family gateway equipment down at the ONU user port and use CVID to come the scene of differentiated service type, carry out the normal distribution of group business stream by travelling across VLAN.
In order to solve the problems of the technologies described above, the invention provides a kind of multicast spanning virtual local area networks implementation method based on optical network unit, comprising:
First VLAN is set on home gateway to be used for interactive network TV service; Dividing second VLAN on optical network unit and optical line terminal uses for multicast service;
Home gateway sends multicast request message to optical network unit, comprises first information of virtual local area network in the described multicast request message;
The user port of optical network unit is received after the described multicast request message, parse described first information of virtual local area network, set up that first VLAN ID is transparent to this request message on the optical line terminal then to the mapping relations of second VLAN ID under this user port;
When carrying the descending multicast traffic stream of second VLAN ID or descending multicast inquiry protocol massages and arriving the user port of described optical network unit, according to the mapping relations of first VLAN ID under the described user port to second VLAN ID, second VLAN ID in described multicast traffic stream or the multicast inquiry protocol massages is replaced to first VLAN ID, then described multicast traffic stream or multicast inquiry protocol massages are sent to the home gateway of described transmission multicast request message from described user port.
Since method of the present invention when the user port of ONU adds the request message of multicast, set up first VLAN CVLAN sign under this port＜--the mapping relations of second VLAN MVLAN sign, and set up the multicast forwarding clauses and subclauses, in the described multicast forwarding clauses and subclauses relevant for the relevant information of port, thereby realize the travelling across VLAN distribution of descending multicast protocol message and multicast traffic stream, realized the diversity of the professional networking of IPTV.The present invention is applicable to polytype ustomer premises access equipment, and a more complete multicast solution is provided, and has enlarged multicast service popularizing in xPON.
Description of drawings
Fig. 1 is the multicast spanning virtual local area networks implementation method flow chart based on optical network unit of first embodiment of the invention.
Fig. 2 is the Signalling exchange flow chart between home gateway, ONU and the OLT;
Fig. 3 is the multicast forwarding illustrative view of functional configuration of ONU;
Fig. 4 is the specific implementation flow chart of striding the vlan multicast of home gateway scene described in one embodiment of the invention.
Embodiment
Core concept of the present invention is: the user port of ONU is received after the multicast request message of home gateway transmission, is obtained and write down the CVLAN information in this message; Set up the sign of CVLAN under this port＜--the mapping relations of MVLAN sign, on ONU, set up the multicast forwarding clauses and subclauses simultaneously, be used for the distribution of descending multicast packet; When descending multicast traffic stream that has a MVLAN tag and multicast inquiry protocol massages arrive user port, according to the CVLAN of previous this port of setting up sign＜--MVLAN sign mapping relations table, MVLAN tag in multicast packet and the multicast inquiry protocol massages is replaced to CVLAN tag, send from user port then, make the family gateway equipment of hanging under the user port can receive multicast traffic stream and multicast inquiry protocol massages smoothly.
Below by specific embodiments and the drawings the present invention is described in further details.
With reference to shown in Figure 1, the multicast spanning virtual local area networks implementation method flow chart based on optical network unit for first embodiment of the invention said method comprising the steps of:
Step 101: first VLAN is set on home gateway uses for interactive network TV service; Dividing second VLAN on optical network unit and optical line terminal uses for multicast service;
Step 102: home gateway sends multicast request message to optical network unit, comprises first information of virtual local area network in the described multicast request message;
Step 103: the user port of optical network unit is received after the described multicast request message, parse described first information of virtual local area network, set up that first VLAN ID is transparent to this request message on the optical line terminal then to the mapping relations of second VLAN ID under this user port;
Step 104: when carrying the descending multicast traffic stream of second VLAN ID or descending multicast inquiry protocol massages and arriving the user port of optical network unit, according to first VLAN ID under previous this user port set up that inquires to the mapping relations of second VLAN ID, second VLAN ID in multicast traffic stream or the descending multicast inquiry protocol massages is replaced to first VLAN ID, then multicast traffic stream or descending multicast inquiry protocol massages are sent from user port.
As preferred embodiment a kind of, the user port of optical network unit is received after the described multicast request message, parses after the step of described first information of virtual local area network, also comprises:
Determine whether the VLAN ID in this message is through the VLAN ID after the VLAN ID conversion; If then obtain the preceding VLAN ID of conversion, i.e. first VLAN ID according to the mapping relations in the VLAN conversion table; Otherwise the VLAN ID in the message is first VLAN ID.
As preferred embodiment a kind of, described method also comprises:
On optical network unit and optical line terminal, set up the multicast forwarding clauses and subclauses, described multicast forwarding clauses and subclauses are used for the distribution of descending multicast packet, the user port information of the optical network unit that comprise second information of virtual local area network that is exclusively used in multicast service and uses in the described multicast forwarding clauses and subclauses, receives described multicast request message and receive the optical line terminal port information of multicast request message, the multicast group IP address information in the described multicast request message.
Also comprise in the described multicast request message: being used to distinguish is to add multicast request or leave type of message information, the multicast ip address of multicast request, the sign of user port.
Described optical network unit also comprises the multicast filtering table, the media access control address and the subscriber port sign of second VLAN ID, multicast are set in the described multicast filtering table, media access control address wherein is that mapping obtains according to multicast ip address, and is corresponding
When carrying the descending multicast traffic stream of second VLAN ID or descending multicast inquiry protocol massages and arriving the user port of optical network unit, carry out the distribution of multicast packet according to media access control address and subscriber port sign that second VLAN ID, multicast are set in the described multicast filtering table.
Preferably, described multicast forwarding clauses and subclauses are arranged on two layers of crosspoint of device of optical network unit.
As preferred embodiment a kind of, after the described step that parses the described first VLAN ID information, also comprise the step of noting this first VLAN ID information.
In a preferred embodiment of the present invention,, set up the mapping relations table of one first VLAN ID to second VLAN ID for each user port of optical network unit.
In additional embodiments of the present invention, the multicast spanning virtual local area networks implementation method based on optical network unit may further comprise the steps:
Step 201: the first special VLAN CVLAN is set on home gateway uses for IPTV is professional; Dividing the second special-purpose VLAN MVLAN on ustomer premises access equipment ONU and local side apparatus OLT uses for multicast service;
The user port of step 202:ONU is received after the multicast request message of home gateway transmission, is noted the first VLAN CVLAN information in this message; Set up the mapping relations that the first VLAN CVLAN identifies and the second VLAN MVLAN identifies under this port simultaneously; Then this request message is transparent on the local side apparatus OLT.
Wherein, described step 202 specifically comprises:
After 2021:ONU equipment is received the multicast request message that has the first virtual LAN VLAN information at user port, extract the first virtual LAN VLAN information in the message;
2022: determine by the VLAN ID conversion table of inquiry exchange chip whether the first VLAN VID (LAN ID) in this message is through first virtual LAN VLAN after the conversion; If, then obtain the first preceding VLAN VID of conversion according to the mapping relations in the conversion table, be the first VLAN CVLAN of IPTV business; Otherwise the vlan information in the message is the first VLAN CVLAN of IPTV business.
2023: note this first VLAN CVLAN information, for each user port, set up one first VLAN CVLAN sign＜--the mapping relations table of second VLAN MVLAN sign;
2024: set up the multicast forwarding clauses and subclauses on ONU equipment, described multicast forwarding clauses and subclauses comprise: vlan information, port information, IP address information.Vlan information in the forwarding entry is to be exclusively used in second VLAN MVLAN (multicast virtual local area network) information that multicast service uses, and these clauses and subclauses are used for the distribution of descending multicast packet; Do not change the content of request message, with this message transmission to local side apparatus OLT;
When the described request message is when adding the request message of multicast, to carry out each step of 1021-1024.
When the described request message is when leaving the request message of multicast, do not carry out each step of 1021-1024.
Step 203: descending multicast traffic stream all has the second VLAN MVLAN tag, carries out the distribution of multicast packet to each user port according to the previous multicast forwarding clauses and subclauses of setting up on ONU equipment; When data flow arrives user port, according to the first VLAN CVLAN of previous this port of setting up sign＜--second VLAN MVLAN sign mapping relations table, the second VLAN MVLAN tag in the multicast traffic stream is replaced to the first VLAN CVLAN tag, send from user port then.
Step 204: descending multicast inquiry protocol massages all has MVLAN tag, when this query message arrives user port, according to the first VLAN CVLAN of previous this port of setting up sign＜--second VLAN MVLAN sign mapping relations table, the second VLAN MVLAN tag in the query message is replaced to the first VLAN CVLAN tag, send from user port then.
In the such scheme, described multicast request message specifically comprises: being used to distinguish is to add multicast request or leave type of message information, M-VLAN sign, the multicast ip address of multicast request, the sign of user port.Wherein, the MAC Address that multicast is designated multicast ip address, M-VLAN sign and is shone upon by multicast ip address in the described multicast forwarding clauses and subclauses.
In the such scheme, the described multicast forwarding clauses and subclauses of setting up on ONU equipment are: two layers of crosspoint that described multicast forwarding clauses and subclauses are arranged on ONU equipment.
Fig. 2 is the Signalling exchange flow chart between home gateway HG, ONU and the OLT in the method for the invention.Referring to Fig. 2, in specific implementation, the multicast forwarding clauses and subclauses are set up and safeguarded to ONU and OLT equipment separately after receiving the upstream multicast request message that home gateway sends, comprise three contents in each forwarding entry: vlan information, port information, IP address information.Described vlan information is for being exclusively used in second VLAN (MVLAN) information that multicast service uses; Described port information is user port (ONU) that receives multicast request message and PON mouth (OLT) information that receives multicast request message; Described IP address information is the multicast group address in the multicast request message.
The multicast forwarding clauses and subclauses are used for the distribution of descending multicast traffic stream, ONU and OLT equipment are according to the information in the multicast forwarding clauses and subclauses, specifically, be basis multicast group address information, multicast virtual local area network and port information wherein, the multicast traffic stream that belongs to this multicast group is forwarded in corresponding multicast virtual local area network and the port.
Fig. 3 is the forwarding capability structural representation of ONU equipment.Referring to Fig. 3, ONU equipment is made up of EPON media interviews control (PON MAC) unit and two layers of exchange (L2 SWITCH) unit two parts usually.Owing to relate to the Virtual Local Area Network technology, therefore the network of ONU is to network interface (NNI, Network-Network Interface) multicast packet of side joint receipts is for having second VLAN (multicast virtual local area network) data of label (mvlan tag), the multicast packet that forwards in the UNI of ONU (User-Network Interface, user interface) side is first VLAN (interactive television service VLAN) data (cvlan tag) that have label.Because the operation flow of EPON media interviews control (PON MAC) unit is not an emphasis of the present invention, therefore repeats no more herein.
The present invention is directed to multicast service, on two layers of crosspoint, the multicast filtering table is set, the VLAN sign of multicast is set in the multicast filtering table, the MAC Address of multicast and subscriber port sign, (the Medium Access Control of MAC wherein, media interviews control) address is that mapping obtains according to multicast ip address, two layers of crosspoint receive PON MAC unit and filter the multicast packet that forwarding comes, the multicast ip address of this multicast packet is mapped as MAC Address, inquire about described multicast filtering table, the user port of the described multicast mac address correspondence that is write down in this multicast filtering table is transmitted described multicast packet.
Under initial condition, described multicast filtering table is sky, and therefore two layers of exchange are carried out discard processing to the unknown multicast data under initial condition.
Fig. 4 is the specific implementation flow chart of striding the vlan multicast of the described home gateway scene of third embodiment of the invention.Referring to Fig. 4, this flow process comprises:
Step 401, the first special VLAN CVLAN is set on home gateway uses for IPTV is professional.
Step 402, send the IGMP request message to ONU equipment.
The user port of step 403, ONU is received after the multicast request message of home gateway transmission, note the first VLAN CVLAN information in this message, for each user port, set up one first VLAN CVLAN sign＜--the mapping relations table of second VLAN MVLAN sign.
Step 404, set up the multicast forwarding clauses and subclauses on ONU equipment, the vlan information in the forwarding entry is to be exclusively used in the second VLAN MVLAN information that multicast service uses, and these clauses and subclauses are used for the distribution of descending multicast packet.
Step 405, do not change the content of request message, with this message transmission to local side apparatus OLT.
Step 406, set up the multicast forwarding clauses and subclauses on OLT equipment, the vlan information in the forwarding entry is to be exclusively used in the second VLAN MVLAN information that multicast service uses, and these clauses and subclauses are used for the distribution of descending multicast packet.
Step 407, issue multicast traffic stream.
Step 408, descending multicast traffic stream all have the second VLAN MVLAN tag, carry out the distribution of multicast packet to each user port according to the previous multicast forwarding clauses and subclauses of setting up on ONU equipment.
Step 409, when data flow arrives user port, according to the first VLAN CVLAN of previous this port of setting up sign＜--the mapping relations table of second VLAN MVLAN sign, the second VLAN MVLAN tag in the multicast traffic stream is replaced to the first VLAN CVLAN tag, send from user port then.
Step 410, issue multicast packet and flow to home gateway.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with the people of this technology in the disclosed technical scope of the present invention; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
Claims (8)
1. the multicast spanning virtual local area networks implementation method based on optical network unit is characterized in that, comprising:
First VLAN is set on home gateway to be used for interactive network TV service; Dividing second VLAN on optical network unit and optical line terminal uses for multicast service;
Home gateway sends multicast request message to optical network unit, comprises the first VLAN ID information in the described multicast request message;
The user port of optical network unit is received after the described multicast request message, parse the described first VLAN ID information, set up that first VLAN ID is transparent to this request message on the optical line terminal then to the mapping relations of second VLAN ID under this user port;
When carrying the descending multicast traffic stream of second VLAN ID or descending multicast inquiry protocol massages and arriving the user port of described optical network unit, according to the mapping relations of first VLAN ID under the described user port to second VLAN ID, second VLAN ID in described multicast traffic stream or the multicast inquiry protocol massages is replaced to first VLAN ID, then described multicast traffic stream or multicast inquiry protocol massages are sent to the home gateway of described transmission multicast request message from described user port.
2. the method for claim 1 is characterized in that,
Describedly parse the described first VLAN ID information, comprising:
Determine whether the VLAN ID in this message is through the VLAN ID after the conversion; If then obtain the preceding VLAN ID of conversion, i.e. first VLAN ID according to the mapping relations in the VLAN conversion table; Otherwise the VLAN ID in the message is first VLAN ID.
3. the method for claim 1 is characterized in that, also comprises:
On optical network unit and optical line terminal, set up the multicast forwarding clauses and subclauses, described multicast forwarding clauses and subclauses are used for the distribution of descending multicast packet, the user port information of the optical network unit that comprise the second VLAN ID information that is exclusively used in multicast service and uses in the described multicast forwarding clauses and subclauses, receives described multicast request message and receive the optical line terminal port information of multicast request message, the multicast ip address information in the described multicast request message.
4. the method for claim 1 is characterized in that, also comprises in the described multicast request message: being used to distinguish is to add multicast request or leave type of message information, the multicast ip address of multicast request, the sign of user port.
5. the method for claim 1, it is characterized in that, described optical network unit also comprises the multicast filtering table, the media access control address and the subscriber port sign of second VLAN ID, multicast are set in the described multicast filtering table, media access control address wherein is that mapping obtains according to multicast ip address, accordingly
When carrying the descending multicast traffic stream of second VLAN ID or descending multicast inquiry protocol massages and arriving the user port of optical network unit, carry out the distribution of multicast packet according to media access control address and subscriber port sign that second VLAN ID, multicast are set in the described multicast filtering table.
6. method as claimed in claim 3 is characterized in that, described multicast forwarding clauses and subclauses are arranged on two layers of crosspoint of device of optical network unit.
7. the method for claim 1 is characterized in that, after the described step that parses the described first VLAN ID information, also comprises the step of noting this first VLAN ID information.
8. the method for claim 1 is characterized in that, for each user port of optical network unit, sets up the mapping relations table of one first VLAN ID to second VLAN ID.
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| CN101945251B (en) * | 2010-06-02 | 2014-02-05 | 中兴通讯股份有限公司 | Method, system and set top box for realizing control over interactive internet protocol television service |
| US10356579B2 (en) | 2013-03-15 | 2019-07-16 | The Nielsen Company (Us), Llc | Methods and apparatus to credit usage of mobile devices |
| CN103354502B (en) * | 2013-07-08 | 2016-04-20 | 深圳市共进电子股份有限公司 | A kind of implement method for trans-VLAN multicast in EPON home gateway |
| CN104702425A (en) * | 2013-12-06 | 2015-06-10 | 上海斐讯数据通信技术有限公司 | Optical line terminal equipment upgrade method |
| CN105119826B (en) * | 2015-07-08 | 2018-06-29 | 上海斐讯数据通信技术有限公司 | A kind of multicast group management method and system based on forwarding and control separation |
| CN111385026B (en) * | 2018-12-29 | 2022-08-26 | 中兴通讯股份有限公司 | OLT equipment virtualization method and OLT equipment |
| CN109743646A (en) * | 2019-03-12 | 2019-05-10 | 深圳市瑞吉联通信科技有限公司 | A kind of delivery method and device of broadband connection data flow |
| CN111541610A (en) * | 2020-04-21 | 2020-08-14 | 北京天融信网络安全技术有限公司 | Communication method, communication device, network equipment and computer readable storage medium |
| CN112004242B (en) * | 2020-08-31 | 2023-03-14 | 成都新潮传媒集团有限公司 | Port mapping registration method and device of elevator terminal and computer equipment |
| CN112751682B (en) * | 2020-12-28 | 2023-04-07 | 武汉长光科技有限公司 | Multicast communication control method for expanding PON local area network group based on VXLAN technology |
| CN113207049B (en) * | 2021-03-31 | 2022-05-27 | 新华三信息安全技术有限公司 | Multicast forwarding method and device |
| CN113765916B (en) * | 2021-09-07 | 2023-04-18 | 成都长虹网络科技有限责任公司 | IPTV multicast control method, system, computer equipment and storage medium |
| CN114172854B (en) * | 2021-11-30 | 2024-03-19 | 新华三大数据技术有限公司 | Report Wen Jingxiang, mirror image configuration method, virtual switch and mirror image configuration device |
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