CN102271044A - Bidirectional conversion method and system of ASM (Any Source Multicast) and SSM (Source Specific Multicast) based on IPv6 (Internet Protocol Version 6) - Google Patents
Bidirectional conversion method and system of ASM (Any Source Multicast) and SSM (Source Specific Multicast) based on IPv6 (Internet Protocol Version 6) Download PDFInfo
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Abstract
The invention discloses a bidirectional conversion method and system of an ASM (Any Source Multicast) and an SSM (Source Specific Multicast) based on an IPv6 (Internet Protocol Version 6). The method comprises the following steps of: S1, initializing the bidirectional conversion between the ASM and the SSM based on the IPv6; S2, receiving a user conversion application; if the conversion application is from the ASM to the SSM, transferring to a step S3; if the conversion application is from the SSM to the ASM, transferring to a step S4; and, if the conversion application is neither from the ASM to the SSM nor from the SSM to the ASM, refusing the application; S3, performing the conversion from the IPv6-based ASM to the IPv6-based SSM; and S4, performing the conversion from the IPv6-based SSM to the IPv6-based ASM. According to the method and the system disclosed by the invention, the bidirectional conversion between the IPv6-based ASM and the IPv6-based SSM can be carried out according to the applied conversion information; the IPv6-based SSM can be converted into the IPv6-based ASM; and the IPv6-based ASM from one group but a plurality of sources can be converted into the IPv6-based SSM from a plurality of different source addresses but the same multicast group.
Description
Technical field
The present invention relates to Internet technical field, particularly a kind of ASM and SSM multicast bi-directional conversion method and system based on IPv6.
Background technology
High-performance Video transmission system (comprising video conferencing system and network television system) with technical characterstics such as big data quantity, low delays is that the typical case of Next Generation Internet uses, and this application itself has proposed very high request to aspects such as the network bandwidth and real-times to network, end system and application system.Popular Video Applications system comprises DVTS system, VLC system and high definition non-compression video system at present, resolution from SD (720 * 480) to high definition (1920 * 1080), transmission bandwidth has different characteristics from 22Mbps to 800Mbps, for the different demands of user provide different services.The high-performance Video transmission system generally has a bit the concurrent transmission characteristic to multiple spot or multiple spot to multiple spot, owing to reasons such as port speed constraint, network congestions, current the Internet differs and satisfies Video transmission system requirement for bandwidth under concurrent multiplexing scene surely.Before this, not specially at the method for the solution network problem of Video transmission system, traditional transmission method based on clean culture, under concurrent multiplexing scene, consume network bandwidth seriously, and may be because of excessive network congestion and the packet loss of causing of concurrent number, each road transmission performance all is affected.
On the basis of IPv6 internet architecture of new generation; Any-Source Multicast (Any Source Multicast; ASM) and specific source multicasting (Source Specific Multicast; SSM) technology reduces to guarantee the data redundancy in the Internet in order to the data message transmission service of a kind of one-to-many and multi-to-multi to be provided in network layer as far as possible.On the link of a plurality of copies that originally sent datagram, ASM multicast and SSM multicast are by specific method for routing, the data message that sends on this link is restricted to only individual data message, thereby strict control data redundancy, but lack the method for between the network user of the network user who supports the ASM multicast and support SSM multicast, carrying out bi-directional conversion.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: between the network user of the network user who supports the ASM multicast and support SSM multicast, how with the data message forwarding of ASM multicast network to the SSM multicast network, and how with the data message forwarding of SSM multicast network to the ASM multicast network.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of ASM and SSM multicast bi-directional conversion method based on IPv6, may further comprise the steps:
S1:IPv6ASM and the initialization of SSM multicast bi-directional conversion;
S2: receive the user and change application; If ASM then changes step S3 over to SSM conversion application; If SSM then changes step S4 over to ASM conversion application; If, then refuse an application neither ASM neither change application to ASM by SSM to SSM conversion application;
S3: carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast;
S4: carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
Preferably, described step S1 specifically comprises:
S11: read local IPv6 address list from local profile;
S12: according to the sequencing of IPv6 address in the profile address tabulation, verification address legitimacy successively; If the address is legal, for it distributes ID; If the address is illegal, do not distribute ID for it;
S13: set up the mapping relations of ID and local IPv6 address among the S12, save as the local address mapping table.
Preferably, the local profile among the described step S11 comprises a plurality of IPv6 unicast address that this locality can receive the network interface card configuration of IPv6ASM multicast and SSM multicast.
Preferably, the ID of the local IPv6 address of distributing among the described step S12 is since 1 and be the positive integer of continuous dispensing.
Preferably, described step S3 specifically comprises:
S31: the ASM that extracts user's submission is to SSM multicast conversion application information, and described application information comprises the ASM multicast group address before the conversion, the SSM group address that need be transformed into;
S32: determine whether to be legal IPv6ASM group address according to the ASM group address in the described application information, if non-legal IPv6ASM group address then refuses an application;
S33: determine whether to be legal IPv6SSM group address according to the SSM group address in the described application information, if non-legal IPv6SSM group address then refuses an application;
S34: determine whether to distribute to address pool that should the IPv6SSM group address according to the IPv6SSM group address that is mapped to, as not distributing address pool, then distribute address pool, and in the ASM group address in the address pool mapping table, this IPv6SSM group address address pool is pointed in the mapping address pond of this ASM group address;
S35: the IPv6ASM multicast group that adds the appointment of IPv6ASM group address;
S36: the user sends the IPv6ASM multicast data message to the IPv6ASM group address;
S37:, transmit operation for the data message that in the IPv6ASM multicast group, receives.
Preferably, described step S37 specifically comprises:
S371: after receiving data I Pv6ASM data message, in the address pool mapping table, find address pool in the ASM group address, in address pool, search then this message＜IPv6 address, source, the ASM group address〉tuple, if exist in the address pool this message＜IPv6 address, source, the ASM group address〉tuple, then search its corresponding ID,, determine then whether address pool has address space left if there is not the IPv6 address, source of this message in the address pool, if address space left is arranged in the address pool, then in address pool, add the IPv6 address, source of this message, and distribute corresponding ID and change step S372 over to, otherwise, refusal is transmitted application, stops the S37 step;
S372: use the ID that finds or distribute among the S371, as the ID item, search the local IPv6 address of this ID correspondence in the local address mapping table of in S13, setting up;
S373: the local IPv6 address that source IPv6 address binding is found in the S372;
S374: the IPv6ASM data message is sent to IPv6SSM multicast group among the S33.
Preferably, described step S4 specifically comprises:
S41: the conversion SSM that extracts user's submission is to ASM multicast conversion application information, and described application information comprises SSM source address and the group address before the conversion, the ASM group address that is transformed into;
S42: determine whether to be legal IPv6SSM group address according to the SSM group address in the described application information, if non-legal IPv6SSM group address then refuses an application;
S43: determine whether legal IPv6ASM group address according to the ASM group address in the described application information, if non-legal IPv6ASM group address then refuses an application;
S44: first local address in the local address mapping table that the SSM source address binding is set up in the S13;
S45: the IPv6SSM source address that the conversion application information that the user submits among the adding S41 comprises and the IPv6SSM multicast group of IPv6SSM group address appointment;
S46: the user sends the IPv6SSM multicast data message to the IPv6SSM group address;
S47: the IPv6SSM data message is sent to IPv6ASM multicast group among the S43.
The present invention also provides a kind of ASM and SSM multicast bi-directional conversion system based on IPv6, comprising:
The application information receiver module is used to receive the conversion application information that the user submits to;
The application information authentication module is connected with described application information receiver module, is used to verify whether the IPv6ASM of user applies and SSM multicast address be legal; If the group address of application is invalid, then refuse an application;
IPv6ASM multicasts to IPv6SSM multicast modular converter, is connected with described application information authentication module, is used to carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast;
IPv6SSM multicasts to IPv6ASM multicast modular converter, is connected with described application information authentication module, is used to carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
Preferably, described IPv6ASM multicasts to IPv6SSM multicast modular converter and adds corresponding IPv6ASM multicast group according to application information, and the SSM group address that is mapped to for this ASM multicast group is distributed corresponding address pool, when the user when the IPv6ASM multicast group sends data, check this data source address, according to this＜source address, the ASM group address〉whether in address pool, exist and carry out corresponding address assignment operation, if exist, then from address pool, search corresponding gateway local address, if do not exist, then in address pool, distribute gateway local address that should source address; Subsequently, as source address, send to the IPv6SSM multicast group of user applies with this gateway local address.
Preferably, described IPv6SSM multicasts to IPv6ASM multicast modular converter and adds corresponding IPv6SSM multicast group according to application information, when the user when the IPv6SSM multicast group sends data, as source address, send to the IPv6ASM multicast group of user applies with the gateway local address.
(3) beneficial effect
The present invention carries out IPv6ASM multicast and IPv6SSM multicast bi-directional conversion according to the transitional information of being applied for, the IPv6SSM multicast can be converted to the IPv6ASM multicast, can with from one the grouping but the IPv6ASM multicast in a plurality of sources is converted to multiple source address difference the identical IPv6SSM multicast of multicast group.
Description of drawings
Fig. 1 is a cellular logic topology diagram of the present invention;
Fig. 2, Fig. 3 are ASM and the SSM multicast bi-directional conversion method flow diagrams that the present invention is based on IPv6;
Fig. 4 is ASM and the SSM multicast bi-directional conversion system construction drawing that the present invention is based on IPv6.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used to illustrate the present invention, but do not limit the scope of the invention.
As shown in Figure 1, apply for that with user u1 and u3 ASM and the service of SSM multicast bi-directional conversion based on IPv6 are that example illustrates the present invention, wherein bi-directional conversion gateway GW is between u1 and u3, and GW is to the network support IPv6ASM multicast between u1, and GW is to the network support IPv6SSM multicast between u3.
Bi-directional conversion gateway GW is deployed between user u1 and the u3, and ASM and SSM multicast bi-directional conversion service routine based on IPv6 are installed, and disposes operation in back 24 hours, waits for user's multicast conversion application, and major function is as follows:
Wait user's multicast conversion application obtains multicast conversion application information from the user, comprises that ASM changes application information to SSM conversion application information and SSM to ASM.Wherein ASM comprises the ASM multicast group address before the conversion, the SSM group address that need be transformed into to SSM conversion application information, and SSM comprises SSM multicast source that conversion is preceding and group address, the ASM group address that need be transformed into to ASM conversion application information;
After receiving multicast conversion application information, ASM and SSM multicast bi-directional conversion gateway GW carry out corresponding operating according to the type of conversion application information.
As Fig. 2, shown in Figure 3, ASM and SSM multicast bi-directional conversion method based on IPv6 of the present invention may further comprise the steps: S1:IPv6ASM and the initialization of SSM multicast bi-directional conversion; S2: receive the user and change application; If ASM then changes step S3 over to SSM conversion application; If SSM then changes step S4 over to ASM conversion application; If, then refuse an application neither ASM neither change application to ASM by SSM to SSM conversion application; S3: carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast; S4: carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
The specific implementation flow process of the inventive method:
The user comprises that to the details of bi-directional conversion gateway GW submit applications (comprising: ASM changes to SSM the conversion applying type; SSM is to the ASM conversion) and corresponding additional information.ASM comprises to the additional information of SSM conversion: the ASM group address before the conversion, the SSM group address that is transformed into.SSM comprises to the additional information of ASM conversion: SSM source address and group address before the conversion, the ASM group address that is transformed into.
GW determines corresponding initialization operation according to user's translation type.If whether application ASM, then checks this ASM grouping to SSM conversion and was applied, if application, then be this ASM packet map to SSM group address pond open up corresponding address pool, and with this this address pool of ASM packet points.If application SSM is to the ASM conversion, first address of then taking out the GW local address is as forwarding address.
The user sends data, the beginning repeating process:
If what the user sent is the ASM multicast, then to search in should the address pool of ASM group address the user＜source address, the ASM group address〉tuple.If there is above-mentioned tuple in the address pool, then with the GW local address of this address correspondence as source address, the load of ASM message is sent to the SSM group address.If there is no user's address in the address pool then is that this station address distributes a GW local address, and as source address, and the load of ASM message is sent to the SSM group address.
If what the user sent is the SSM multicast, then with first address of GW local address as source address, the load of this SSM message is sent to the ASM group address.
The address initial configuration of preserving among the GW is as follows:
The group address buffer memory of preserving among the GW is as follows:
Wherein, each group address may be ASM or SSM group address arbitrarily; ASM type identifier and SSM type identifier are distinguished with integer 1 and 2; ASM group address corresponding address pond memory address, the ASM group address that the ASM address should be forwarded to for this SSM grouping are pointed in SSM address pool position.
Each SSM address pool of preserving among the GW is as follows:
Wherein, after certain address pool item was occupied, " whether taking " sign position was enabled.
System of the present invention realizes
As shown in Figure 4, ASM and SSM multicast bi-directional conversion system based on IPv6 of the present invention comprise: application information receiver module 10 is used to receive the conversion application information that the user submits to; Application information authentication module 20 is connected with described application information receiver module, is used to verify whether the IPv6ASM of user applies and SSM multicast address be legal; If the group address of application is invalid, then refuse an application; IPv6ASM multicasts to IPv6SSM multicast modular converter 31, is connected with described application information authentication module, is used to carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast; IPv6SSM multicasts to IPv6ASM multicast modular converter 32, is connected with described application information authentication module, is used to carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
Described IPv6ASM multicasts to IPv6SSM multicast modular converter and adds corresponding IPv6ASM multicast group according to application information, and the SSM group address that is mapped to for this ASM multicast group is distributed corresponding address pool, when the user when the IPv6ASM multicast group sends data, check this data source address, according to this＜source address, the ASM group address〉whether in address pool, exist and carry out corresponding address assignment operation, if exist, then from address pool, search corresponding gateway local address, if do not exist, then in address pool, distribute gateway local address that should source address; Subsequently, as source address, send to the IPv6SSM multicast group of user applies with this gateway local address.
Described IPv6SSM multicasts to IPv6ASM multicast modular converter and adds corresponding IPv6SSM multicast group according to application information, when the user when the IPv6SSM multicast group sends data, as source address, send to the IPv6ASM multicast group of user applies with the gateway local address.
As from the foregoing, this method has been finished based on Networking Platform design IPv6, that support ASM multicast and SSM multicast bi-directional conversion; Proposed ASM and SSM multicast bi-directional conversion method, supported the mutual conversion of two kinds of multicasts, IPv6ASM and SSM multicast intercommunication problem under a framework based on IPv6.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvement and replacement, these improvement and replacement also should be considered as protection scope of the present invention.
Claims (10)
1. ASM and SSM multicast bi-directional conversion method based on an IPv6 is characterized in that, may further comprise the steps:
S1:IPv6ASM and the initialization of SSM multicast bi-directional conversion;
S2: receive the user and change application; If ASM then changes step S3 over to SSM conversion application; If SSM then changes step S4 over to ASM conversion application; If, then refuse an application neither ASM neither change application to ASM by SSM to SSM conversion application;
S3: carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast;
S4: carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
2. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 1 is characterized in that described step S1 specifically comprises:
S11: read local IPv6 address list from local profile;
S12: according to the sequencing of IPv6 address in the profile address tabulation, verification address legitimacy successively; If the address is legal, for it distributes ID; If the address is illegal, do not distribute ID for it;
S13: set up the mapping relations of ID and local IPv6 address among the S12, save as the local address mapping table.
3. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 2 is characterized in that, the local profile among the described step S11 comprises a plurality of IPv6 unicast address that this locality can receive the network interface card configuration of IPv6ASM multicast and SSM multicast.
4. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 2 is characterized in that, the ID of the local IPv6 address of distributing among the described step S12 is since 1 and be the positive integer of continuous dispensing.
5. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 1 is characterized in that described step S3 specifically comprises:
S31: the ASM that extracts user's submission is to SSM multicast conversion application information, and described application information comprises the ASM multicast group address before the conversion, the SSM group address that need be transformed into;
S32: determine whether to be legal IPv6ASM group address according to the ASM group address in the described application information, if non-legal IPv6ASM group address then refuses an application;
S33: determine whether to be legal IPv6SSM group address according to the SSM group address in the described application information, if non-legal IPv6SSM group address then refuses an application;
S34: determine whether to distribute to address pool that should the IPv6SSM group address according to the IPv6SSM group address that is mapped to, as not distributing address pool, then distribute address pool, and in the ASM group address in the address pool mapping table, this IPv6SSM group address address pool is pointed in the mapping address pond of this ASM group address;
S35: the IPv6ASM multicast group that adds the appointment of IPv6ASM group address;
S36: the user sends the IPv6ASM multicast data message to the IPv6ASM group address;
S37:, transmit operation for the data message that in the IPv6ASM multicast group, receives.
6. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 5 is characterized in that described step S37 specifically comprises:
S371: after receiving data I Pv6ASM data message, in the address pool mapping table, find address pool in the ASM group address, in address pool, search then this message＜IPv6 address, source, the ASM group address〉tuple, if exist in the address pool this message＜IPv6 address, source, the ASM group address〉tuple, then search its corresponding ID,, determine then whether address pool has address space left if there is not the IPv6 address, source of this message in the address pool, if address space left is arranged in the address pool, then in address pool, add the IPv6 address, source of this message, and distribute corresponding ID and change step S372 over to, otherwise, refusal is transmitted application, stops the S37 step;
S372: use the ID that finds or distribute among the S371, as the ID item, search the local IPv6 address of this ID correspondence in the local address mapping table of in S13, setting up;
S373: the local IPv6 address that source IPv6 address binding is found in the S372;
S374: the IPv6ASM data message is sent to IPv6SSM multicast group among the S33.
7. ASM and SSM multicast bi-directional conversion method based on IPv6 as claimed in claim 1 is characterized in that described step S4 specifically comprises:
S41: the conversion SSM that extracts user's submission is to ASM multicast conversion application information, and described application information comprises SSM source address and the group address before the conversion, the ASM group address that is transformed into;
S42: determine whether to be legal IPv6SSM group address according to the SSM group address in the described application information, if non-legal IPv6SSM group address then refuses an application;
S43: determine whether legal IPv6ASM group address according to the ASM group address in the described application information, if non-legal IPv6ASM group address then refuses an application;
S44: first local address in the local address mapping table that the SSM source address binding is set up in the S13;
S45: the IPv6SSM source address that the conversion application information that the user submits among the adding S41 comprises and the IPv6SSM multicast group of IPv6SSM group address appointment;
S46: the user sends the IPv6SSM multicast data message to the IPv6SSM group address;
S47: the IPv6SSM data message is sent to IPv6ASM multicast group among the S43.
8. ASM and SSM multicast bi-directional conversion system based on an IPv6 is characterized in that, comprising:
Application information receiver module (10) is used to receive the conversion application information that the user submits to;
Application information authentication module (20) is connected with described application information receiver module, is used to verify whether the IPv6ASM of user applies and SSM multicast address be legal; If the group address of application is invalid, then refuse an application;
IPv6ASM multicasts to IPv6SSM multicast modular converter (31), is connected with described application information authentication module, is used to carry out the conversion that IPv6ASM multicasts to the IPv6SSM multicast;
IPv6SSM multicasts to IPv6ASM multicast modular converter (32), is connected with described application information authentication module, is used to carry out the conversion that IPv6SSM multicasts to the IPv6ASM multicast.
9. ASM and SSM multicast bi-directional conversion system based on IPv6 as claimed in claim 8, it is characterized in that, described IPv6ASM multicasts to IPv6SSM multicast modular converter (31) and adds corresponding IPv6ASM multicast group according to application information, and the SSM group address that is mapped to for this ASM multicast group is distributed corresponding address pool, when the user when the IPv6ASM multicast group sends data, check this data source address, according to this＜source address, the ASM group address〉whether in address pool, exist and carry out corresponding address assignment operation, if exist, then from address pool, search corresponding gateway local address, if do not exist, then in address pool, distribute gateway local address that should source address; Subsequently, as source address, send to the IPv6SSM multicast group of user applies with this gateway local address.
10. ASM and SSM multicast bi-directional conversion system based on IPv6 as claimed in claim 8, it is characterized in that, described IPv6SSM multicasts to IPv6ASM multicast modular converter (32) and adds corresponding IPv6SSM multicast group according to application information, when the user when the IPv6SSM multicast group sends data, as source address, send to the IPv6ASM multicast group of user applies with the gateway local address.
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| US6259701B1 (en) * | 1997-09-11 | 2001-07-10 | At&T Corp. | Method and system for a unicast endpoint client to access a multicast internet protocol (IP) session |
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Application publication date: 20111207 |