CN100444576C - Group broadcast realization in IP telecommunication network system - Google Patents
Group broadcast realization in IP telecommunication network system Download PDFInfo
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- CN100444576C CN100444576C CNB2004100497082A CN200410049708A CN100444576C CN 100444576 C CN100444576 C CN 100444576C CN B2004100497082 A CNB2004100497082 A CN B2004100497082A CN 200410049708 A CN200410049708 A CN 200410049708A CN 100444576 C CN100444576 C CN 100444576C
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Abstract
The present invention relates to a method for realizing multicasting in an IP telecommunication network system, which is used for realizing the multicasting initiated by an IP network user. The IP telecommunication network system comprises at least one multi-address connectionless data network, a plurality of IP networks and a plurality of edge pass devices, wherein at least one address mapping device is arranged in the multi-address connectionless data network, IP addresses are adopted for the grouping in the IP networks, and multi-address connectionless data network addresses are adopted for the grouping in the multi-address connectionless data network; the realization of the multicasting comprises the four steps of (1) multicasting announcement, (2) establishment of a multicasting tree, (3) multicasting communication and (4) multicasting termination. In the process of multicasting realization, the edge pass devices and the address mapping device in the multi-address connectionless data network realize the conversion between the multicasting grouping by adopting the IP addresses and the multicasting grouping by adopting the multi-address connectionless data network addresses. The method sets a technical base for realizing multicasting service in the IP telecommunication network system.
Description
Technical field
The present invention relates to a kind of method that in the IP Telecommunication Network system, realizes multicast, particularly initiate the implementation method of multicast (multicast), belong to communication technical field by the IP network user.
Background technology
Multicast is meant and sends same message to more than one destination.In IP network, utilize multicasting technology can realize that the efficient data that a bit arrives multiple spot in the IP network transmits.Since effectively conserve network bandwidth, reduce offered load, the IP multicasting technology all has wide practical use in all many-sides such as real time data transmission, multimedia conferencing, data copy, recreation and emulation.
In the multicasting technology of IP network, certain of dividing into groups to send in the network is determined the node subclass, and this subclass is called multicast group (multicast group), and it is identified by an independent IP address.This address is called as multicast address, is also referred to as D class address.The scope of this Class D IP address is 224.0.0.0～239.255.255.255.Except the destination address part, multicastapackets and ordinary groups are as broad as long.
In the multicast procedures of IP network, the member of multicast group can dynamic change, main frame certain multicast group of having the right to select to add or withdraw from.Main frame can add a plurality of multicast group, also can send data to the multicast group that oneself does not have to add.The forwarding of IP multicastapackets on Internet handled by the router of supporting multicast.The IP multicastapackets that main frame sends is received by all multicast members in this subnet, can be forwarded to multicastapackets on all networks that comprise this multicast member with the multicast router that this subnet directly links to each other simultaneously.
Realize on the IP network that now the technical scheme of multicast is a plurality of, technical comparative maturity, but multicast is not widely used in the IP network, and its reason is that present multicasting technology also exists some technical problems.Existing telecommunications network technology is among the transformation process of essence.People recognize that gradually follow-on telecommunications network should adopt based on the packet-switch technology and the IP network of connection-oriented working method not, and LA Management Room does not adopt complicated flow control technique.For this reason, the inventor of this patent has proposed the technical though of IP Telecommunication Network system, and applied for patent of invention (number of patent application: 200410037641.0, patent application day: on April 28th, 2004).The architecture of this IP Telecommunication Network system and existing IP network based on the Internet design concept have very big difference, therefore, be applicable to that existing multicasting technology can not directly apply in the IP Telecommunication Network system, must carry out necessary transformation in conjunction with the characteristics of IP Telecommunication Network system, promote multicast-capable, satisfy the needs of business development.The present invention promptly provides a kind of technical scheme that realizes multicast in the IP Telecommunication Network system.
Summary of the invention
In the IP Telecommunication Network system, the implementation of multicast has two kinds: the user initiates multicast in (1) IP network; (2) user initiates multicast to nms application.Purpose of the present invention provides promptly that the user initiates the implementation method of multicast in the IP network.
For realizing above-mentioned goal of the invention, the present invention adopts following technical scheme:
A kind of method that in the IP Telecommunication Network system, realizes multicast, be used for realizing by IP network Client-initiated multicast, this IP Telecommunication Network system comprises that at least one multiple location does not have and connects data network, most IP networks, and most edge gateway equipments, described IP network does not have the data network of connection by described edge gateway equipment with described multiple location and connects; Described multiple location does not have in the data network of connection and has at least one address mapping device, the IP address is adopted in grouping in the described IP network, described multiple location does not have the grouping that connects in the data network and adopts multiple location not have the data of connection net address, IP address and multiple location do not have the mapping relations that connect between the data net address and are kept in the interior address mapping table of address mapping device, described multiple location does not have all devices that connects in the data network and all is assigned a multiple location with described edge gateway equipment and does not have the data of connection net address, all devices in the described IP network and described edge gateway equipment all are assigned the IP address, and the authenticated back of described edge gateway equipment connects with described address mapping device; This multicast realizes comprising the announcement of (1) multicast; (2) multicast tree is set up; (3) cast communication; (4) four steps of multicast termination is characterized in that in the multicast implementation procedure:
The IP network multicast address of being realized multicastapackets by described edge gateway equipment and described address mapping device does not have the conversion that is connected between the data network multicast address with multiple location.
Wherein, described multicast announcement process comprises the steps:
(1) the multicast source end points of IP network obtains the IP network multicast address;
(2) the multicast source end points sends the multicast notice packet to network;
(3) the multicast notice packet arrives the edge gateway equipment that is attached thereto through IP network, and edge gateway equipment sends to address mapping device and includes IP network multicast address parameter in interior multicast application;
(4) after address mapping device is received the multicast application that edge gateway equipment sends, generating the IP network multicast address in address mapping device does not have the mapping table that is connected the data network multicast address with multiple location, and includes the multicast response that multiple location does not have connection data network multicast address parameter to the edge gateway equipment transmission.
Described multicast tree is set up process and is comprised the steps:
(1) to add the equipment of the IP network of multicast, send to IP network and include IP network multicast address parameter and add application at interior multicast;
(2) multicast adds the edge gateway equipment that application grouping arrival is connected with destination, and edge gateway equipment sends multicast to address mapping device and adds application;
(3) after address mapping device receives that multicast adds application, preserve the multiple location of described IP network multicast address and destination edge gateway equipment and do not have the data of connection net address, converting described IP network multicast address to multiple location by described edge gateway equipment with described address mapping device does not have the data network of connection multicast address, and the complete multiple location of formation does not have the multiple location that connects data network multicast address and whole destination edge gateway equipments and do not have the data of connection net address in described address mapping device;
(4) after all nodes that will add this multicast tree all added, multicast tree was built up.
Described cast communication process comprises the steps:
(1) the multicast source end points sends multicastapackets to network, multicastapackets arrives the edge gateway equipment that is connected with the multicast source end points, and the edge gateway equipment that is connected with the multicast source end points sends to address mapping device and includes IP network multicast address parameter in interior multicast address analysis request;
(2) address mapping device is received the multicast address analysis request, do address resolution, and to the edge gateway equipment that the multicast source end points connects postback include multiple location do not have connect the data network multicast address, all the multiple location of destination edge gateway equipments does not have and connects data net address parameter and resolve at interior multicast address;
(3) edge gateway equipment of multicast source end points connection sends multicastapackets.
The process of described multicast termination is:
The multicast source end points sends the grouping of multicast termination to network, the edge gateway equipment that the multicast source end points connects sends multicast termination application grouping to address mapping device, address mapping device is removed with described multiple location does not have the relevant whole list items of the data network multicast address of connection, the multicast termination.
The grouping of multicast first packet has complete header and complete multicast extension header, and the header of the follow-up grouping of multicast does not contain the multicast extension header.
Method of the present invention can realize in the IP Telecommunication Network system by IP network Client-initiated multicast, establishes technical foundation for realize professional increment in the IP Telecommunication Network system.
Description of drawings
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is the composition structural representation of IP Telecommunication Network system.
Fig. 2 is for being initiated the implementation method flow chart of multicast by the IP network user in the IP Telecommunication Network system.
Fig. 3 is the flow chart of multicast announcement process.
Fig. 4 sets up the flow chart of process for multicast tree.
Fig. 5 is the flow chart of cast communication process.
Embodiment
Fig. 1 is to realizing the explanation of the IP Telecommunication Network system that the present invention relied on.This IP Telecommunication Network system comprises that at least one multiple location do not have connection data network (being designated hereinafter simply as the NCT data network), most IP networks, and most edge gateway equipment ED.Here said IP network includes but not limited to IP metropolitan area network, Access Network or the local network of users, and it is connected with the NCT data network by edge gateway equipment ED; Also comprise at least one address mapping device ADT in each NCT data network; All devices in the NCT data network and edge gateway equipment all are assigned a NCT data network address, all devices in the IP network and edge gateway equipment ED are assigned the IP address, and the mapping relations between IP address and the NCT data network address are kept among the interior address mapping table of address mapping device ADT; Connect between the authenticated and address mapping device ADT of edge gateway equipment ED.The NCT data network is a kind of architecture of level type, it is made up of core layer equipment CR, convergence-level equipment MR, access layer equipment AR, network management device and address mapping device ADT, communicates by letter by core layer equipment realization separately between each NCT data network.Carry out addressing in the inner address of NCT data network of adopting of NCT data network itself, this data network address is different from the IP address of IP network.This double address structure is to understand the key point of this IP Telecommunication Network system.
In the IP Telecommunication Network system, IP network separates with the strictness on topological structure of NCT data network.Each IP network and a NCT data network connect, and and this IP network under the NCT data network between the relation of breaking the wall of mistrust, if this trusting relationship fails to set up, can not communicate between IP network and the NCT data network; Also be like this between each NCT data network.
Address mapping device ADT equipment is the equipment of realizing map addresses on the network, and it preserves address mapping table.The content-dependent of address mapping table is in the type of the external network that links to each other with edge gateway equipment.Edge gateway equipment ED is the gateway device that IP network is connected with the NCT data network.It has the function of two aspects at least, and the first realizes the conversion of NCT data network address and IP address, makes network can be used to carry existing IP grouping; Another function is that the Business Stream to IP network converges.
Each edge gateway equipment ED has definite NCT data network address and IP address, and knows the IP address of connected equipment or network.Edge gateway equipment must be registered to corresponding address mapping device ADT, and registration process need authenticate, to confirm the trusting relationship between edge gateway equipment ED and the address mapping device ADT.By this authentication, not connection-oriented IP Telecommunication Network system also can realize secure communication.
Be the structure of IP Telecommunication Network system that the present invention is relied on and the brief description of operation logic above.Can just not give unnecessary details at this referring to the specification of this patent application about further specifying of IP Telecommunication Network system.
As mentioned above, this IP Telecommunication Network system comprises the NCT data network that adopts NCT data network address and adopts IP network two parts of IP address.Therefore, the multicast in the IP Telecommunication Network system will inter-network (IP network and NCT data network) be realized, because the NCT data network can provide resource to guarantee, thereby can guarantee the service quality of multicast.Data network in the IP Telecommunication Network system comprises two types of multicasts like this: a kind of is IP network Client-initiated multicast, and another kind is that the user initiates multicast to nms application.In IP network Client-initiated multicast, because what transmit in the IP network is the IP grouping, and what transmit in the NCT data network is the NCT grouping, and IP grouping and NCT are grouped in the process that needs an address transition in the process of inter-network transmission.This is the key technology step that realizes multicast in this IP Telecommunication Network system.
To shown in Figure 5, the user initiates under the situation of multicast in by IP network as Fig. 2, and the implementation procedure of this multicast comprises multicast announcement, multicast tree foundation, cast communication and multicast termination (not shown) four big steps, is described in detail as follows respectively below:
1. the step of multicast announcement:
(1) the multicast source end points of IP network obtains the IP network multicast address according to the program of application multicast address in the IP network.
In the IP Telecommunication Network system, a basic technical thought is exactly to adopt the existing feasible technic relization scheme that facts have proved as far as possible.This technical step is exactly typical example, and what it adopted is exactly prior art.Above-mentioned IP network multicast address is aforesaid Class D IP address (224.0.0.0～239.255.255.255).
(2) the multicast source end points sends the multicast notice packet to network.
In the multicast notice, include the multicast address of this multicast.
(3) the multicast notice packet arrives the edge gateway equipment that is attached thereto through IP network, and edge gateway equipment sends to address mapping device and includes the isoparametric multicast application of IP network multicast address.
(4) address mapping device receives that edge gateway equipment sends have the isoparametric multicast application of IP network multicast address after, generating the IP network multicast address in address mapping device does not have the mapping table that is connected the data net address with multiple location, and has the multicast response that multiple location does not have connection data network multicast address parameter to the edge gateway equipment transmission.
The front is mentioned, and has the mapping relations table between IP address and the NCT address in address mapping device ADT, by this table can obtain with the corresponding NCT data network of IP network multicast address in multicast address.
2. the step set up of multicast tree:
(1) to add the equipment of the IP network of multicast, send to IP network and have the isoparametric multicast of IP network multicast address and add application;
(2) have the edge gateway equipment that the isoparametric multicast adding of IP network multicast address application grouping is connected with destination by the arrival such as technology that realize cast communication in tunnel or the existing IP network, edge gateway equipment sends to address mapping device and has the isoparametric multicast adding of IP network multicast address application;
(3) after address mapping device receives that having the isoparametric multicast of IP network multicast address adds application, preserving the multiple location of this IP network multicast address and destination edge gateway equipment does not have the data of connection net address, address mapping device form complete multiple location do not have connect the data network multicast address and all the multiple location of destination edge gateway equipments do not have the data of connection net address.
(4) after all nodes that will add this multicast tree all added, multicast tree was built up.
3. the step of cast communication:
(1) the multicast source end points sends multicastapackets to network, multicastapackets arrives the edge gateway equipment that is connected with the source end by technology such as tunnel or IP network multicast protocols, and the edge gateway equipment that is connected with the multicast source end points sends to address mapping device and has the isoparametric multicast address analysis request of IP network multicast address.
(2) address mapping device is received the multicast address analysis request, do address resolution, and to the edge gateway equipment that the multicast source end points connects postback have multiple location do not have connect the data network multicast address, all the multiple location of destination edge gateway equipments does not have the isoparametric multicast address resolution response of the data net address of connection.
(3) edge gateway equipment that connects of multicast source end points send the same multicast address first be grouped into first packet, the grouping of multicast first packet has complete header and complete multicast extension header, and the multiple location that has whole destination edge gateway equipments in the multicast extension header does not have the data of connection net address.
(4) edge gateway equipment that connects of multicast source end points sends second grouping of same multicast address and later is grouped into the follow-up grouping of multicast, and the header of follow-up grouping can not contain the multicast extension header.
(5) comprise in the multicastapackets: multicast identification field, multicast address field and grouping load.
Comprise the multicast extension header in the first packet multicastapackets.
In order to realize multicast, in packet format, 3 fields have been defined: multicast identification field, multicast address field, multicast extension header for multicast.In the multicast procedures of IP Telecommunication Network system, the first packet grouping has complete header and complete multicast extension header, has the NCT address of whole destination ED in the multicast extension header.Wherein, multicast first packet and leaf node are revised bag to be needed to confirm, therefore sends with the order packet form.Because the whole node devices in the NCT data network all have buffer memory (Cache) ability, after the first packet of multicast passes through, utilize buffer memory the NCT address of NCT multicast address and whole leaf node ED can be remembered, when follow-up grouping comes, only need the NCT multicast address to get final product.Therefore, the header of follow-up grouping can not contain the multicast extension header.
4. the step of multicast termination:
The multicast source end points sends the grouping of multicast termination to network, the edge gateway equipment that the multicast source end points connects sends to address mapping device and has the isoparametric multicast termination of multicast address application grouping, address mapping device is removed the whole list items relevant with this multicast address, the multicast termination.
For atm device that is not based on the IP agreement or frame relay (FR) equipment, as long as in ADT, prepare the mapping table of atm address or frame relay address and NCT address, and in ED, finish the work of address transition, can realize the multicast that ATM or Frame Relay Device participate in equally.
Above the implementation method of initiating multicast by the IP network user in the IP Telecommunication Network system is had been described in detail, but obvious specific implementation form of the present invention is not limited thereto.For the those skilled in the art in present technique field, the various conspicuous change of under the situation of spirit that does not deviate from the method for the invention and claim scope it being carried out is all within protection scope of the present invention.
Claims (10)
1. method that in the IP Telecommunication Network system, realizes multicast, be used for realizing by IP network Client-initiated multicast, this IP Telecommunication Network system comprises that at least one multiple location does not have and connects data network, most IP networks, and most edge gateway equipments, described IP network does not have the data network of connection by described edge gateway equipment with described multiple location and connects; Described multiple location does not have in the data network of connection and has at least one address mapping device, the IP address is adopted in grouping in the described IP network, described multiple location does not have the grouping that connects in the data network and adopts multiple location not have the data of connection net address, described IP address and described multiple location do not have the mapping relations that connect between the data net address and are kept in the interior address mapping table of described address mapping device, described multiple location does not have all devices that connects in the data network and all is assigned a multiple location with described edge gateway equipment and does not have the data of connection net address, all devices in the described IP network and described edge gateway equipment all are assigned the IP address, and the authenticated back of described edge gateway equipment connects with described address mapping device; This multicast realizes comprising the announcement of (1) multicast; (2) multicast tree is set up; (3) cast communication; (4) four steps of multicast termination is characterized in that in the multicast implementation procedure:
The IP network multicast address of being realized multicastapackets by described edge gateway equipment and described address mapping device does not have the conversion that is connected between the data network multicast address with multiple location.
2. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 1, described multicast is initiated by user in the IP network, it is characterized in that:
Described multicast announcement process comprises the steps:
(1) the multicast source end points of IP network obtains the IP network multicast address;
(2) the multicast source end points sends the multicast notice packet to network;
(3) the multicast notice packet arrives the edge gateway equipment that is attached thereto through IP network, and edge gateway equipment sends to address mapping device and comprises IP network multicast address parameter in interior multicast application;
(4) after address mapping device is received the multicast application that edge gateway equipment sends, generating the IP network multicast address in address mapping device does not have the mapping table that is connected the data network multicast address with multiple location, and has the multicast response that multiple location does not have connection data network multicast address parameter to the edge gateway equipment transmission.
3. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 1, described multicast is initiated by user in the IP network, it is characterized in that:
Described multicast tree is set up process and is comprised the steps:
(1) to add the equipment of the IP network of multicast, send to IP network and comprise the IP network multicast address and add application at interior multicast;
(2) multicast adds the edge gateway equipment that application grouping arrival is connected with destination, and edge gateway equipment sends multicast to address mapping device and adds application;
(3) after address mapping device receives that multicast adds application, preserve the multiple location of described IP network multicast address and destination edge gateway equipment and do not have the data of connection net address, converting described IP network multicast address to multiple location by described edge gateway equipment with described address mapping device does not have the data network of connection multicast address, and the complete multiple location of formation does not have the multiple location that connects data network multicast address and whole destination edge gateway equipments and do not have the data of connection net address in described address mapping device;
(4) after all nodes that will add this multicast tree all added, multicast tree was built up.
4. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 1, described multicast is initiated by user in the IP network, it is characterized in that:
Described cast communication process comprises the steps:
(1) the multicast source end points sends multicastapackets to network, multicastapackets arrives the edge gateway equipment that is connected with the multicast source end points, and the edge gateway equipment that is connected with the multicast source end points sends to address mapping device and comprises IP network multicast address parameter in interior multicast address analysis request;
(2) address mapping device is received the multicast address analysis request, do address resolution, and to the edge gateway equipment that the multicast source end points connects postback include multiple location do not have connect the data network multicast address, all the multiple location of destination edge gateway equipments does not have and connects data net address parameter and resolve at interior multicast address;
(3) edge gateway equipment of multicast source end points connection sends multicastapackets.
5. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 1, described multicast is initiated by user in the IP network, it is characterized in that:
The process of described multicast termination is:
The multicast source end points sends the grouping of multicast termination to network, the edge gateway equipment that the multicast source end points connects sends multicast termination application grouping to address mapping device, address mapping device is removed with described multiple location does not have the relevant whole list items of the data network multicast address of connection, the multicast termination.
6. as any described method that realizes multicast in the IP Telecommunication Network system in the claim 2 to 5, described multicast is initiated by user in the IP network, it is characterized in that:
Described multicast source end points connects by technology and the described edge gateway equipment that comprises the tunnel.
7. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 4, described multicast is initiated by user in the IP network, it is characterized in that:
Comprise multicast identification field, multicast address field and grouping load in the described multicastapackets.
8. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 4, described multicast is initiated by user in the IP network, it is characterized in that:
The grouping of multicast first packet has complete header and complete multicast extension header, and the header of the follow-up grouping of multicast does not contain the multicast extension header.
9. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 8, described multicast is initiated by user in the IP network, it is characterized in that:
The multiple location that has whole destination edge gateway equipments in the described multicast extension header does not have the data of connection net address.
10. the method that in the IP Telecommunication Network system, realizes multicast as claimed in claim 8, described multicast is initiated by user in the IP network, it is characterized in that:
Described multicast first packet grouping sends with the order packet form.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100497082A CN100444576C (en) | 2004-06-24 | 2004-06-24 | Group broadcast realization in IP telecommunication network system |
| EP05752258A EP1748600A4 (en) | 2004-04-28 | 2005-04-28 | A system and communication method of ip telecommunication network and its application |
| PCT/CN2005/000594 WO2005107161A1 (en) | 2004-04-28 | 2005-04-28 | A system and communication method of ip telecommunication network and its application |
| US11/587,810 US7894458B2 (en) | 2004-04-28 | 2005-04-28 | System and communication method of IP telecommunication network and its application |
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| CNB2004100497082A CN100444576C (en) | 2004-06-24 | 2004-06-24 | Group broadcast realization in IP telecommunication network system |
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| CN100444576C true CN100444576C (en) | 2008-12-17 |
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| CN101369907B (en) | 2007-08-15 | 2011-09-28 | 华为技术有限公司 | Multicast service implementing method, its apparatus and system |
| CN101815141B (en) * | 2009-02-24 | 2012-01-04 | 北京中京创原通信技术有限公司 | Edge gateway equipment-oriented address analyzing method |
| CN101902344B (en) * | 2009-06-01 | 2015-04-01 | 中兴通讯股份有限公司 | Method for establishing multicast tree in public packet telecom data network (PTDN) and system thereof |
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