CN102546382B - Method and system for realizing multicast in Internet protocol version 4 over Internet protocol version 6 (IPv4overIPv6) tunnel - Google Patents
Method and system for realizing multicast in Internet protocol version 4 over Internet protocol version 6 (IPv4overIPv6) tunnel Download PDFInfo
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Abstract
The invention provides a method and a system for realizing multicast in an Internet protocol version 4 over Internet protocol version 6 (IPv4overIPv6) tunnel. The method comprises the following steps that: a user side gateway encapsulates an Internet group management protocol (IGMP) multicast group addition request into an IPv6 tunnel for transmission, maps an IPv4 multicast group address into an IPv6 multicast group address, generates a multicast listener discovery (MLD) request message and transmits the MLD request message to a network side; the network side updates an IPv4 multicast tree forwarding table and an IPv6 multicast tree forwarding table; after receiving an IPv4 multicast data packet, the network side maps the IPv4 multicast group address into the IPv6 multicast group address, and downstream forwards an IPv6 multicast data packet obtained by the address mapping; a multicast replication point transmits the multicast-replicated IPv6 multicast data packet to a user side; and after receiving the IPv6 multicast data packet, the user side gateway decapsulates the IPv6 multicast data packet according to a multicast address mapping relationship, recovers the IPv4 multicast data packet and transmits the IPv4 multicast data packet to a user terminal.
Description
Technical field
The present invention relates to IPv6 networking technology area, especially, relate to a kind of method and system of realizing multicast in IPv4overIPv6 tunnel.
Background technology
At present, IPv4 address has presented situation more and more in short supply, according to distributor gear (Internet Assigned NumberAuthority, IANA) the address usage data prediction of nearest 3 years, global ip v4 address resource will exhaust around the end of the year in 2011.In the case, IPv6 address substitutes IPv4 address has gradually become the inexorable trend of internet development.But, the incompatibility of IPv6 agreement and IPv4 agreement has also caused IPv4 application can not move in IPv6 network stranghtforwardly, Just because of this, also drawn the multiple transitional technology in IPv6 evolution stage, except the relatively ripe double-stack technology of current research, be suitable in addition tunneling technique and the translation technology of different scenes.
For IPv4 address situation in short supply, can and provide the network access environment of IPv6 to solve the problem of address shortage for broadband user's distributing IP v6 address, simultaneously, provide application abundant on IPv4 network if continue as IPv6 access user, not only can adopt the tunneling technique of IPv4overIPv6 to realize IPv4 application passing through IPv 6 network, the more typical DS-Lite technology (being working group's draft of IETF at present) that can also adopt.
In IPv4overIPv6 tunnel, IPv6 datagram header is encapsulated into before the header of original IPv4 packet, thereby can realizes the direct transmission of IPv4 packet on IPv6 network.For IPv4 unicast data stream, the equipment by two ends, tunnel: home gateway and network side gateway encapsulate and decapsulation just can realize passing through of packet.But, for original IPv4 multicast packet, owing to can only see the unicast address at two ends, IPv6 tunnel in tunnel, None-identified encapsulates inner IPv4 multicast group address, also cannot use multicast distribution technology, all IPv4 multicast packets all will transmit by tunnel as unicast packet, thereby cause the reduction of bandwidth waste and the transmission efficiency of IPv6 bearer network.
Summary of the invention
The technical problem that the present invention will solve is to provide a kind of method and system of realizing multicast in IPv4overIPv6 tunnel, can make IPv4 multicast service can in IPv6 access network, realize multicast replication function, to improve the transmission efficiency of Internet resources.
According to an aspect of the present invention, a kind of method that realizes multicast in IPv4overIPv6 tunnel has been proposed, comprise that user's side gateway is by Internet Group Management Protocol (The Internet Group Management Protocol, IGMP) the multicast group message that joins request is encapsulated in IPv6 tunnel and transmits, according to the multicast address mapping relations that arrange, the IGMP multicast group IPv4 multicast group address carrying in message that joins request is mapped as to IPv6 multicast group address, generate and send multicast listener to network side based on IPv6 multicast group address and find agreement (Multicast Listener Discovery, MLD) request message, network side upgrades IPv4 multicast tree and transmits with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of IGMP multicast group, network side is receiving after the IPv4 multicast packet of upstream, according to multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address, the mode based on shared tree or the tree based on source is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to IPv6 multicast tree, network side multicast replication point copies the IPv6 multicast packet receiving, and the IPv6 multicast packet after copying is issued to IPv6 multicast tree transmits user's side gateway that middle request adds multicast group, user's side gateway, receiving after IPv6 multicast packet, carries out decapsulation according to multicast address mapping relations to IPv6 multicast packet, restores IPv4 multicast packet and is sent to user terminal.
According to a further aspect in the invention, a kind of system that realizes multicast in IPv4overIPv6 tunnel has also been proposed, comprise network equipment and the user side equipment being connected by tunnel, wherein, user side equipment, being encapsulated into IPv6 tunnel for message that IGMP multicast group is joined request transmits, according to the multicast address mapping relations that arrange, the IGMP multicast group IPv4 multicast group address carrying in message that joins request is mapped as to IPv6 multicast group address, generate and send MLD request message to network side based on IPv6 multicast group address, and according to multicast address mapping relations, IPv6 multicast packet is carried out to decapsulation to restore IPv4 multicast packet and to be sent to user terminal receiving after IPv6 multicast packet, network equipment, the IGMP multicast group join request message and/or the MLD request message that send for receiving user's side, upgrade IPv4 multicast tree and transmit with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of IGMP multicast group, receiving after the IPv4 multicast packet of upstream, IPv4 multicast group address is mapped as to IPv6 multicast group address, mode based on shared tree or the tree based on source is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to IPv6 multicast tree, and the IPv6 multicast packet receiving is copied, and the IPv6 multicast packet after copying is issued to described IPv6 multicast tree transmits the user side equipment that middle request adds multicast group.
The method and system of realizing multicast in IPv4overIPv6 tunnel provided by the invention, adopting IPv4overIPv6 tunnel to advance under the scene of IPv6 network evolution, realize IPv4 multicast packet by the mapping relations of IPv4 multicast group address and IPv6 multicast group address and wrap in the transmission in IPv6 multicast tree, in ensureing that IPv4 multicast service seamlessly transits, significantly save the bandwidth of IPv6 bearer network, realized more efficiently utilizing bearer network resource.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of an embodiment of the present invention's method of realizing multicast.
Fig. 2 is the system topological schematic diagram of an embodiment again of the present invention's method of realizing multicast.
Fig. 3 is the mapping relations schematic diagram between IPv4 multicast group address and IPv6 multicast group address.
Fig. 4 is the structural representation of an embodiment of the present invention's system of realizing multicast.
Fig. 5 is the structural representation that the present invention realizes another embodiment of the system of multicast.
Fig. 6 is the structural representation that the present invention realizes the another embodiment of the system of multicast.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Exemplary embodiment of the present invention and explanation thereof are used for explaining the present invention, but do not form inappropriate limitation of the present invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.
Fig. 1 is the schematic flow sheet of an embodiment of the present invention's method of realizing multicast.
As shown in Figure 1, this embodiment can comprise the following steps:
S102, user's side gateway is encapsulated into the IGMP multicast group message that joins request in IPv6 tunnel and transmits, according to the multicast address mapping relations that arrange, the IGMP multicast group IPv4 multicast group address carrying in message that joins request is mapped as to IPv6 multicast group address, generates and send MLD request message to network side based on IPv6 multicast group address;
Illustrate, user terminal (for example, Set Top Box) to user's side gateway (for example, home gateway) initiate the IGMP multicast group message that joins request, home gateway is being received after this message, the message that on the one hand IGMP multicast group joined request is encapsulated in IPv6 tunnel and transmits, home gateway is according to the IGMP multicast group message extraction IPv4 multicast group address that joins request on the other hand, according to multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address again, automatically generate the MLD request message that this IPv6 multicast group adds, and send MLD request message to the multicast replication point of network side.
S104, network side upgrades IPv4 multicast tree and transmits with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of IGMP multicast group.
S106, network side is receiving after the IPv4 multicast packet of upstream, according to multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address, the mode based on shared tree or the tree based on source is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to IPv6 multicast tree.
S108, network side multicast replication point copies the IPv6 multicast packet receiving, and the IPv6 multicast packet after copying is issued to user's side from all of the port of multicast group, that is, be issued to IPv6 multicast tree and transmit user's side gateway that middle request adds multicast group.
S110, user's side gateway, receiving after IPv6 multicast packet, carries out decapsulation according to multicast address mapping relations to IPv6 multicast packet, restores IPv4 multicast packet and is sent to user terminal.
This embodiment can solve the continuity problem of original IPv4 multicast application in the process to the evolution of IPv6 network,, provides the efficient transmission of original IPv4 multicast service in IPv6 network under the IPv4overIPv6 tunnel scene of setting up that is.In this embodiment, the handling process that is transmitted in IPv4 network or dual-stack network part of original IPv4 multicast packet is constant, and in IPv6 network, IPv4 multicast packet can be shared identical multicast duplicating method with IPv6 multicast packet, not only save Internet resources, and kept the simplification of handling process.
Realize in another embodiment of method of multicast in the present invention, multicast address mapping relations comprise and IPv4 multicast group address are mapped as to multicast identifier field in IPv6 multicast group address and the Scop field of IPv6 multicast group address is set to multicast address mapped identification, the address of IPv4 multicast group can be encapsulated in IPv6 multicast group address like this, to transmit in IPv6 network.
Realize in the another embodiment of method of multicast in the present invention, network side upgrades IPv4 multicast tree and transmits the step of transmitting with IPv6 multicast tree and can comprise according to receiving join request the corresponding interface of message and/or MLD request message of IGMP multicast group:
Network side Broadband Remote Access Server judges whether the interface that receives MLD request message is present in during IPv6 multicast tree transmits, if there is no, the interface that receives MLD request message is joined IPv6 multicast tree transmit in to send IPv6 multicast packet to this interface, and send Protocol Independent Multicast (Protocol Independent Multicast to network side gateway, PIM) message that joins request, wherein, the PIM message bearing IPv6 multicast group address that joins request;
Network side gateway joins request after message receiving PIM, and Broadband Remote Access Server is added to IPv6PIM neighborhood, and by receive PIM join request the interface of message join IPv6 multicast tree transmit in to send IPv6 multicast packet to this interface;
Network side gateway carries out decapsulation to the IGMP multicast group transmitting in the tunnel message that joins request, according to IGMP multicast group join request the IPv4 multicast group of carrying in message add message by receive IPv4 multicast group add the interface of message be updated to IPv4 multicast tree transmit in to send IPv4 multicast packet to this interface.
Realize in an embodiment again of method of multicast in the present invention, the step that the mode based on shared tree is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to IPv6 multicast tree can comprise:
Network side gateway sends the PIM message that joins request after upgrading as shared tree convergent point to IPv4 multicast source server, the message bearing IPv4 multicast group address that joins request of the PIM after renewal;
IPv4 multicast source server joins request after message at the PIM receiving after renewal, by receive PIM after upgrading join request the interface of message be updated to IPv4 multicast tree transmit in and issue IPv4 multicast packet to this interface;
Network side gateway, receiving after IPv4 multicast packet, is mapped as IPv6 multicast group address according to multicast address mapping relations by IPv4 multicast group address, and to the IPv6 multicast packet after Broadband Remote Access Server forwarding address mapping.
Realize in an embodiment again of method of multicast in the present invention, network side multicast replication point can be Layer 2 switch, Digital Subscriber Line Access Multiplexer (Digital Subscriber Line Access Multiplexer, or EPON (Passive Optical Network, PON) equipment DSLAM).
Fig. 2 is the system topological schematic diagram of an embodiment again of the present invention's method of realizing multicast.
In this embodiment, user's lateral terminal and the IPv4 that is applied as that need to access apply, user access control equipment Broadband Remote Access Server (Broadband Remote Access Server, BRAS) is user assignment IPv6 address, realizes user's IPv6 access.Between home gateway and network side gateway, set up IPv4overIPv6 tunnel, realize IPv4 packet passing through by IPv6 tunnel.Taking Set Top Box as example, suppose that this user's Set Top Box sends the application that adds of IPv4 multicast group, IPv6 access network provides the scheme of identifying and transmit IPv4 multicast packet in IPv6 tunnel, possess and comprise the following steps, wherein, the fine dotted line in Fig. 2 represents IPv4 multicast signaling flow, and thick dashed line represents IPv6 multicast signaling flow, fine line represents IPv4 group business stream, and heavy line represents IPv6 group business stream:
S202, subscriber computer top box (IPv4) is initiated the IGMP multicast group message that joins request to home gateway.
S204, home gateway (two stack) is supported multicast agent (IGMP proxy) Function Extension, the message that on the one hand IGMP multicast group joined request is encapsulated in IPv6 tunnel and transmits, home gateway is IPv6 multicast group address by the IPv4 multicast group address of receiving by relationship map shown in Fig. 3 on the other hand, and automatically generate the MLD request message that this IPv6 multicast group adds (MLD be used for subscriber's main station and and the multicast router of its direct neighbor between set up, safeguard multicast member relation, function with to realize principle all identical with IGMP), and send MLD request message to network side,
Wherein, the mapping relations example of IPv4 multicast group address and IPv6 multicast group address has been shown in Fig. 3, in IPv6 address, 128 multicast group address forms are as follows:
Multicast flag: 8 is all 1;
Flgs flag: 4, wherein, high 3 is to retain position, gets 0, and lowest order is temporary mark position, and value 0 is the well-known multicast address of permanent allocation, and value 1 is the multicast address of non-permanent allocation;
Scop:4 position, identify the range of application of this IPv6 multicast group, wherein, 3 (0011), 4 (0100), 6 (0110), 7 (0111), 9 (1001)～D (1101) are unallocated, can optionally one of them be set to multicast address mapped identification, for example, can be set to as shown in Figure 39;
Reserved:80 position, in RFC2373, regulation is necessary for full 0;
Group ID:32 position, IPv6 multicast identifier number.
In order to realize the mapping one by one of IPv4 multicast group address and IPv6 multicast group address, Scop field of the present invention is used the unappropriated 9 multicast mapping addresss for all IPv4overIPv6 tunnel, address after IPv4 mapping as shown in Figure 3, can be stored in these mapping relations in home gateway and network side gateway to carry out the mapping of IPv4 and IPv6 multicast address.
In Fig. 3, be that 1 multicast flag represents IPv6 multicast address entirely, being the multicast address that 0001 Flgs represents impermanent distribution, is the multicast mapping address that 1001 Scop represents the IPv4overIPv6 tunnel using, and Group ID is embedded IPv4 multicast address.
S206, edge copy-point (for example, switch, DSLAM or PON) support MLD to monitor (snooping), receive MLD request message (, MLD multicast group join request message) and realize adding of IPv6 multicast group and forward MLD request message.
S208, BRAS receives MLD multicast group and joins request, judge (whether the interface that receives this MLD request message be present in IPv6 multicast tree, multicast group) transmit, transmit and not yet record this interface as multicast tree, this interface is added to during IPv6 multicast tree transmits, and send the PIM message (multicast group address is IPv6) that joins request to network upstream, if BRAS has had the record of this interface, no longer send the PIM message that joins request to network upstream.
S210, network side gateway is as shared tree convergent point (the Rendezvous Point of IPv6 multicast tree, RP) receiving PIM that BRAS sends joins request after message BRAS is added to IPv6PIM neighborhood, and to the IGMP multicast group encapsulating in the tunnel message decapsulation that joins request, add information for the IPv4 multicast group of carrying in IGMP message, the port of reception is added to IPv4 multicast tree, set up IPv4 multicast forward table, and sending the PIM message that joins request to network side, the multicast group address in this message is IPv4 address.
S212, IPv4 multicast source server or IPv4 multicast share tree convergent point RP receive that PIM joins request after message (multicast group address is IPv4), add multicast tree to transmit the interface that receives this message, and send multicast data flow to this interface, arrive network side gateway by IPv4 multicast tree.
S214, network side gateway is received after the IPv4 multicast packet of upstream, according to address mapping relation, IPv4 multicast group address is mapped as to IPv6 multicast group address,, before IPv4 multicast header, encapsulate IPv6 multicast header, the IPv6 multicast packet setting it as after mapping forwards.
S216, IPv6 multicast packet arrives after BRAS, and BRAS transmits the forwarding of carrying out multicast packet based on IPv6 multicast tree.
S218, the scene for multicast replication point at switch or DSLAM, when IPv6 multicast packet arrives multicast replication point, carries out copying of IPv6 multicast packet, thereafter the multicast packet copying is sent from all of the port of multicast group.
S220, home gateway receives IPv6 multicast packet, will encapsulate the packet decapsulation of IPv6 multicast header, the IPv4 multicast packet of reduction tunnel internal, concurrent feeding device top box by the mapping relations of above-mentioned IP v6 multicast group address and IPv4 multicast group address.
The above embodiment of the present invention need not increase special equipment in IP network, first mapping relations between IPv4 multicast group address and IPv6 multicast group address are set in the time of network design, secondly carry out the conversion process of multicast signaling and packet in IPv4overIPv6 tunnel terminal device: home gateway mainly completes IGMP proxy expanded function, the MLD that the triggers IPv6 multicast group mapping address signaling that joins request; Network side gateway processes IGMP adds signaling to set up IPv4 multicast forward table, and sends IPv4PIM signaling message to network side, the IPv6 multicast join message that treatments B RAS side is sent simultaneously, the IPv6PIM neighborhood between foundation and BRAS.Function and the business processing flow of original BRAS, access network equipment, multicast service platform, Set Top Box etc. are continued to use original system.
Fig. 4 is the structural representation of an embodiment of the present invention's system of realizing multicast.
As shown in Figure 4, the system 10 of this embodiment can comprise network equipment 11 and the user side equipment 12 being connected by tunnel, wherein,
User side equipment 12, is encapsulated into IPv6 tunnel for message that IGMP multicast group is joined request and transmits, according to the multicast address mapping relations that arrange, the join request IPv4 multicast group address that carries in message of IGMP multicast group is mapped as to IPv6 multicast group address, generates and send MLD request message and according to multicast address mapping relations, IPv6 multicast packet is carried out to decapsulation to restore IPv4 multicast packet and to be sent to user terminal receiving after IPv6 multicast packet to network side based on IPv6 multicast group address;
Network equipment 11, the IGMP multicast group join request message and/or the MLD request message that send for receiving user's side, upgrade IPv4 multicast tree and transmit with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of IGMP multicast group, receiving after the IPv4 multicast packet of upstream, IPv4 multicast group address is mapped as to IPv6 multicast group address, mode based on shared tree or the tree based on source is according to the IPv6 multicast packet after the forwarding address mapping downstream of IPv6 multicast tree, and the IPv6 multicast packet receiving is copied, and the IPv6 multicast packet after copying is issued to IPv6 multicast tree transmits the user side equipment that middle request adds multicast group.
In this embodiment, IPv4 multicast packet arrives network side gateway by original multicast tree, before IPv4 multicast packet header, encapsulate the IPv6 multicast packet header of mapping relations, by IPv6 multicast distribution mode, IPv4 multicast packet is sent to home gateway, after home gateway decapsulation, still send to the mode of Set Top Box that IPv4 multicast application can normally be used in IPv6 network by IPv4 multicast packet, and do not affect the transmission efficiency of original IPv4 multicast service.
Fig. 5 is the structural representation that the present invention realizes another embodiment of the system of multicast.
As shown in Figure 5, compared with embodiment in Fig. 4, the user side equipment 21 in the system 20 of this embodiment can comprise user terminal 211 and user's side gateway 212 of interconnection, wherein,
User terminal 211, for join request to user's side gateway initiation IGMP multicast group message and reception IPv4 multicast group data bag;
User's side gateway 212, is encapsulated into IPv6 tunnel for message that IGMP multicast group is joined request and transmits and realize the mutual mapping between IPv4 multicast group address and IPv6 multicast group address according to multicast address mapping relations.
Fig. 6 is the structural representation that the present invention realizes the another embodiment of the system of multicast.
As shown in Figure 6, compared with embodiment in Fig. 4, the network equipment 31 in the system 30 of this embodiment can comprise multicast replication point 311, Broadband Remote Access Server 312, network side gateway 313 and IPv4 multicast source server 314, wherein,
Multicast replication point 311, be connected with user side equipment 12, be used for receiving MLD request message and IPv6 multicast packet is copied, and the IPv6 multicast packet after copying is issued to IPv6 multicast tree transmits user's side gateway that middle request adds multicast group;
Broadband Remote Access Server 312, be connected with multicast replication point 311, whether the interface that receives MLD request message for judging is present in IPv6 multicast tree is transmitted, if there is no, the interface that receives MLD request message is joined during IPv6 multicast tree transmits, and send join request message and transmit and forward IPv6 multicast packet according to IPv6 multicast tree of PIM to network side gateway, and wherein, the PIM message bearing IPv6 multicast group address that joins request;
Network side gateway 313, be connected with Broadband Remote Access Server 312, be used for receiving the PIM message that joins request, Broadband Remote Access Server is added to IPv6PIM neighborhood, join during IPv6 multicast tree transmits receiving the join request interface of message of PIM, the IGMP multicast group transmitting in the tunnel message that joins request is carried out to decapsulation, add message to add the interface of message to be updated to during IPv4 multicast tree transmits by receiving IPv4 multicast group according to the join request IPv4 multicast group of carrying in message of IGMP multicast group, send the PIM message that joins request after upgrading as shared tree convergent point to IPv4 multicast source server, and according to multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address receiving after the IPv4 multicast packet of upstream, and to the IPv6 multicast packet after Broadband Remote Access Server forwarding address mapping, wherein, PIM after the renewal message bearing IPv4 multicast group address that joins request,
IPv4 multicast source server 314, be connected with network side gateway 313, for receiving PIM after the renewal message that joins request, by receive PIM after upgrading join request the interface of message be updated to IPv4 multicast tree transmit in and issue IPv4 multicast packet to this interface.
Realize in an embodiment again of system of multicast in the present invention, multicast address mapping relations comprise and IPv4 multicast group address are mapped as to multicast identifier field in IPv6 multicast group address and the Scop field of IPv6 multicast group address is set to multicast address mapped identification, wherein, instantiation can be referring to above-mentioned Fig. 3.
Realize in an embodiment again of system of multicast in the present invention, multicast replication point can be Layer 2 switch, DSLAM or PON equipment.
The instantiation of system embodiment of the present invention can, referring to the instantiation of preceding method, just no longer repeat at this.
In addition, the above embodiment of the present invention is not only for DS-Lite tunneling technique, but also can be for IPv4overIPv6 class tunneling technique, thereby makes above-described embodiment have applicability widely.
The above embodiment of the present invention has following beneficial effect:
(1) can for example, realize effective transmission of multicast packet in the main scene of IPv6 network transition (, in IPv4overIPv6 tunneling technique scheme);
(2) because multicast packet wraps in while transmitting in clean culture tunnel, multicast replication point can only be positioned at network side gateway, (descending multicast packet can only copy by unicast stream mode, multicast replication point is at network side gateway), and the present invention can realize moving down of multicast replication point carry IPv4 multicast service in IPv6 network time,, (for example multicast replication point can be moved down into the edge copy-point of support MLDSnooping, Layer 2 switch, DSLAM, or PON equipment);
(3) owing to originally can only propagating flux of multicast with IPv6 clean culture tunnel style between network side gateway and user's side gateway,, can there is 1 Media Stream to each multicast user, if adopt mode of the present invention, no matter in multicast group, there are how many users, between network side gateway and multicast replication point, only have 1 Media Stream, thus can improve that newly-increased IPv6 converges, in access network for the transmission efficiency of multicast service, reduce the bandwidth demand to bearer network;
(4) the present invention does not affect the flow process of existing IPv4 multicast service, does not affect function and the performance requirement of the existing Set Top Box of user, multicast service platform;
(5) the present invention does not need to increase specific equipment, on the basis of original IPv4overIPv6 home gateway and network side gateway, improves, workable.
Although specific embodiments more of the present invention are had been described in detail by example, it should be appreciated by those skilled in the art, above example is only in order to describe, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (8)
1. a method that realizes multicast in IPv4overIPv6 tunnel, is characterized in that, comprising:
User's side gateway is encapsulated into the IGMP multicast group message that joins request in IPv6 tunnel and transmits, according to the multicast address mapping relations that arrange, the described IGMP multicast group IPv4 multicast group address carrying in message that joins request is mapped as to IPv6 multicast group address, generate and send MLD request message to network side based on described IPv6 multicast group address, described multicast address mapping relations comprise and IPv4 multicast group address are mapped as to multicast identifier field in IPv6 multicast group address and the Scop field of described IPv6 multicast group address is set to multicast address mapped identification;
Network side upgrades IPv4 multicast tree and transmits with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of described IGMP multicast group;
Network side is receiving after the IPv4 multicast packet of upstream, according to described multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address, the mode based on shared tree or the tree based on source is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to described IPv6 multicast tree;
Network side multicast replication point copies the IPv6 multicast packet receiving, and the IPv6 multicast packet after copying is issued to described IPv6 multicast tree transmits user's side gateway that middle request adds multicast group;
User's side gateway is being received after IPv6 multicast packet, according to described multicast address mapping relations, IPv6 multicast packet is carried out to decapsulation, restores IPv4 multicast packet and is sent to user terminal.
2. method according to claim 1, is characterized in that, described network side upgrades IPv4 multicast tree and transmits the step of transmitting with IPv6 multicast tree and comprise according to receiving join request the corresponding interface of message and/or MLD request message of described IGMP multicast group:
Network side Broadband Remote Access Server judges whether receive the interface of described MLD request message is present in during described IPv6 multicast tree transmits, if there is no, join during described IPv6 multicast tree transmits receiving the interface of described MLD request message, and sending the PIM message that joins request to network side gateway, described PIM joins request in message and carries IPv6 multicast group address;
Described network side gateway joins request after message receiving described PIM, and described Broadband Remote Access Server is added to IPv6PIM neighborhood, and joins during described IPv6 multicast tree transmits receiving the join request interface of message of described PIM;
Described network side gateway carries out decapsulation to the IGMP multicast group transmitting in the tunnel message that joins request, and adds message to add the interface of message to be updated to during described IPv4 multicast tree transmits by receiving IPv4 multicast group according to the join request IPv4 multicast group of carrying in message of IGMP multicast group.
3. method according to claim 2, is characterized in that, the step that the described mode based on shared tree is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to described IPv6 multicast tree comprises:
Described network side gateway sends the PIM message that joins request after upgrading as shared tree convergent point to IPv4 multicast source server, the message bearing IPv4 multicast group address that joins request of the PIM after described renewal;
Described IPv4 multicast source server joins request after message at the PIM receiving after renewal, by receive PIM after upgrading join request the interface of message be updated to described IPv4 multicast tree transmit in and issue IPv4 multicast packet to this interface;
Described network side gateway is receiving after described IPv4 multicast packet, according to described multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address, and to the IPv6 multicast packet after the mapping of described Broadband Remote Access Server forwarding address.
4. method according to claim 1, is characterized in that, described network side multicast replication point is Layer 2 switch, DSLAM or PON equipment.
5. a system that realizes multicast in IPv4overIPv6 tunnel, is characterized in that, comprises network equipment and the user side equipment being connected by tunnel, wherein,
Described user side equipment, being encapsulated into IPv6 tunnel for message that IGMP multicast group is joined request transmits, according to the multicast address mapping relations that arrange, the described IGMP multicast group IPv4 multicast group address carrying in message that joins request is mapped as to IPv6 multicast group address, generate and send MLD request message to network side based on described IPv6 multicast group address, and according to described multicast address mapping relations, IPv6 multicast packet is carried out to decapsulation to restore IPv4 multicast packet and to be sent to user terminal receiving after IPv6 multicast packet, described multicast address mapping relations comprise IPv4 multicast group address are mapped as to the multicast identifier field in IPv6 multicast group address, and the Scop field of described IPv6 multicast group address is set to multicast address mapped identification,
Described network equipment, the IGMP multicast group join request message and/or the MLD request message that send for receiving user's side, upgrade IPv4 multicast tree and transmit with IPv6 multicast tree and transmit according to receiving join request the corresponding interface of message and/or MLD request message of described IGMP multicast group, receiving after the IPv4 multicast packet of upstream, IPv4 multicast group address is mapped as to IPv6 multicast group address, mode based on shared tree or the tree based on source is transmitted the IPv6 multicast packet after forwarding address mapping downstream according to described IPv6 multicast tree, and the IPv6 multicast packet receiving is copied, and the IPv6 multicast packet after copying is issued to described IPv6 multicast tree transmits the user side equipment that middle request adds multicast group.
6. system according to claim 5, is characterized in that, described user side equipment comprises user terminal and user's side gateway of interconnection, wherein,
Described user terminal, for initiating join request message and receive IPv4 multicast group data bag of described IGMP multicast group to described user's side gateway;
Described user's side gateway, is encapsulated into IPv6 tunnel for message that described IGMP multicast group is joined request and transmits and realize the mutual mapping between IPv4 multicast group address and IPv6 multicast group address according to described multicast address mapping relations.
7. system according to claim 5, is characterized in that, described network equipment comprises multicast replication point, Broadband Remote Access Server, network side gateway and IPv4 multicast source server, wherein,
Described multicast replication point, be connected with described user side equipment, be used for receiving described MLD request message and IPv6 multicast packet is copied, and the IPv6 multicast packet after copying is issued to described IPv6 multicast tree transmits user's side gateway that middle request adds multicast group;
Described Broadband Remote Access Server, be connected with described multicast replication point, whether the interface that receives described MLD request message for judging is present in IPv6 multicast tree is transmitted, if there is no, join during described IPv6 multicast tree transmits receiving the interface of described MLD request message, and send join request message and transmit and forward IPv6 multicast packet according to described IPv6 multicast tree of PIM to described network side gateway, wherein, the described PIM message bearing IPv6 multicast group address that joins request;
Described network side gateway, be connected with described Broadband Remote Access Server, be used for receiving the described PIM message that joins request, described Broadband Remote Access Server is added to IPv6PIM neighborhood, join during described IPv6 multicast tree transmits receiving the join request interface of message of described PIM, the IGMP multicast group transmitting in the tunnel message that joins request is carried out to decapsulation, add message to add the interface of message to be updated to during described IPv4 multicast tree transmits by receiving IPv4 multicast group according to the join request IPv4 multicast group of carrying in message of IGMP multicast group, send the PIM message that joins request after upgrading as shared tree convergent point to IPv4 multicast source server, and according to described multicast address mapping relations, IPv4 multicast group address is mapped as to IPv6 multicast group address receiving after the described IPv4 multicast packet of upstream, and to the IPv6 multicast packet after the mapping of described Broadband Remote Access Server forwarding address, wherein, PIM after the described renewal message bearing IPv4 multicast group address that joins request,
Described IPv4 multicast source server, be connected with described network side gateway, for receiving PIM after the renewal message that joins request, by receive PIM after upgrading join request the interface of message be updated to described IPv4 multicast tree transmit in and issue IPv4 multicast packet to this interface.
8. system according to claim 7, is characterized in that, described multicast replication point is Layer 2 switch, DSLAM or PON equipment.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US10218467B2 (en) | 2009-12-23 | 2019-02-26 | Pismo Labs Technology Limited | Methods and systems for managing error correction mode |
| US9787501B2 (en) | 2009-12-23 | 2017-10-10 | Pismo Labs Technology Limited | Methods and systems for transmitting packets through aggregated end-to-end connection |
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| CN102820977B (en) * | 2012-08-07 | 2016-05-25 | 福建星网锐捷网络有限公司 | Method of multicasting, device and the network equipment |
| CN103260088B (en) * | 2012-12-14 | 2016-03-16 | 四川九洲电器集团有限责任公司 | A kind of Set Top Box supports the method for IPV4 and IPV6 network simultaneously |
| CN104509046B (en) * | 2013-07-12 | 2017-12-29 | 华为技术有限公司 | A kind of data communications method, equipment and system |
| CN105306227A (en) * | 2014-06-16 | 2016-02-03 | 中兴通讯股份有限公司 | Home gateway DS-Lite multicast method and equipment |
| CN110912798B (en) * | 2014-08-08 | 2021-12-21 | 柏思科技有限公司 | Method and system for transmitting data through aggregated connections |
| CN105491558A (en) * | 2014-09-18 | 2016-04-13 | 北京信威通信技术股份有限公司 | Method for generating IPv6 multicast address of cluster group |
| CN112188301B (en) * | 2019-07-04 | 2022-07-22 | 中国电信股份有限公司 | Communication method, apparatus, system, terminal, and computer-readable storage medium |
| CN114095429B (en) * | 2021-10-14 | 2023-08-15 | 东北大学 | Multi-source multicast flow optimization method based on IPv6 address |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101159659A (en) * | 2007-11-23 | 2008-04-09 | 清华大学 | Method for multicast employing single static bidirectional sharing tree in flexible wire type tunnel |
| CN101296179A (en) * | 2007-10-29 | 2008-10-29 | 清华大学 | Method for IPv6 repeating vector IPv4/6 through inverse path |
| CN101667975A (en) * | 2009-10-23 | 2010-03-10 | 福建星网锐捷网络有限公司 | Route generation method, device, central processing unit and three-layer switch |
-
2011
- 2011-04-22 CN CN201110101354.1A patent/CN102546382B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101296179A (en) * | 2007-10-29 | 2008-10-29 | 清华大学 | Method for IPv6 repeating vector IPv4/6 through inverse path |
| CN101159659A (en) * | 2007-11-23 | 2008-04-09 | 清华大学 | Method for multicast employing single static bidirectional sharing tree in flexible wire type tunnel |
| CN101667975A (en) * | 2009-10-23 | 2010-03-10 | 福建星网锐捷网络有限公司 | Route generation method, device, central processing unit and three-layer switch |
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