CN101145927B

CN101145927B - Carrier network, system and method of multicast and broadcast service

Info

Publication number: CN101145927B
Application number: CN200610153367.2A
Authority: CN
Inventors: 顾亮; 吴建军
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2006-09-12
Filing date: 2006-09-12
Publication date: 2011-10-26
Anticipated expiration: 2026-09-12
Also published as: CN101145927A; WO2008031362A1

Abstract

The invention relates to the wireless communication field, discloses a carrying network, a system and a method for multicasting broadcast services, and allowing WiMAX network to be able to carry MBS services. In the invention, all media flows are respectively carried in IP flows or IP multicast groups in a one-to-one or more-to-one way in CSN, and all the IP flows or the IP multicast groups are respectively carried in service flows in a one-to-one or more-to-one way in ASN. The content identification can indicate an IP flow or an IP multicast group when the IP multicast group contains only one IP flow. The objective added into MBS by the terminal is an IP multicast group or an IP flow. The carried objective connected by the air interface is the service flow, when a plurality of IP flows are carried on an MCID, LCID is needed to discriminate a plurality of content identifications.

Description

The bearer network of multicast broadcast service, system and method

Technical field

The present invention relates to wireless communication field, particularly the multicast and broadcast technology in the WiMAX network.

Background technology

IEEE802.16 is (the Institute of Electrical andElectronics Engineers of Institute of Electrical and Electronics Engineers, be called for short " IEEE ") in promulgation in December calendar year 2001, the standard that provides last kilometer WiMAX to insert at metropolitan area network is provided.

Meanwhile, numerous equipment and establishment supplier have formed World Interoperability for Microwave Access, WiMax (Worldwide Interoperability for Microwave Access, abbreviation " WiMAX ") tissue of forum, its purpose is to accelerate the deployment based on the broadband wireless network of above-mentioned IEEE802.16 series standard by guaranteeing broadband wireless access compatibility of apparatus and interoperability.Therefore, under normal conditions, the system that uses the realization WiMAX access of stipulating in 802.16 series standards is called the WiMAX system.

Fig. 1 shows the end-to-end reference model of WiMAX.As can be seen, WiMAX mainly comprises travelling carriage (Mobile Station, be called for short " MS ")/subscriber station (Subscribe Station, abbreviation " SS "), access service network (Access Service Network, be called for short " ASN ") and connectivity serving network (Connectivity Service Network is called for short " CSN ").

ASN is defined as the network function set that the wireless access service is provided for the WiMAX user terminal, ASN has comprised base station (Base Station, be called for short " BS ") and ASN gateway (ASN GateWay is called for short " ASN-GW ") network element, an ASN may be shared by a plurality of CSN.

The major function of ASN comprises the function of BS and the function of ASN-GW.Wherein, the function of BS has: provide that BS is connected with the L2 of subscriber station SS/MS, the compression and the encryption of RRM, measurement and power control and air interface data.The function of ASN-GW has: for SS/MS authentication function provides agency (proxy) function; Support the network of NSP to find and selection; For SS provides relaying (Relay) function of L3 information, as IP address assignment.

CSN is defined as to the WiMAX user terminal IP is provided Connection Service.CSN mainly provides the IP address assignment of following function: SS/MS, Internet inserts, checking, authorize, charging protocol (Authentication, Authorization, Account, be called for short " AAA ") agency (proxy) or server (server), authorization control based on the user, ASN is to the tunnel of CSN, WiMAX user's charging and the clearing between the operator, tunnel under the roaming condition between the CSN, switching between the ASN and various WiMAX service are (as location-based business, multi-medium multi-packet broadcasting and broadcasting service, the IP Multimedia System business).

MS/SS is (moving) subscriber equipment, and the user uses this devices accessing WiMAX network.

Common communication is the communication between a node and another one node, but along with the increase of user's request, and the introducing of multiple medium, the transmission mode that will look for novelty more promptly also may comprise the communication of multiple spot to multiple spot to multiple spot.In order to support these patterns, wish to satisfy the utilization of resources validity of communication simultaneously again, i.e. multiplexing to some crucial communication resources, the bandwidth of air interface for example, the transmission tunnel of connection identifier (Connection ID is called for short " CID ") and Access Network etc., therefore, in the up-to-date agreement IEEE802.16e/D5 of IEEE802.16, introduced multicast broadcast service (MulticastBroadcast Service is called for short " MBS ").

In traditional communication concept, broadcasting and multicast are a kind of technology that transmits data from a data source to a plurality of targets.Above-mentioned MBS provides in the mobile network by a data source and has sent the standard of data to a plurality of users, can realize that thus Internet resources share, and improves the utilance of utilization rate of network resource, especially air interface resource.

It is worthy of note, above-mentioned MBS not only can realize the multicast and the broadcasting of the information series business of plain text, low rate, can also realize the multicast and the broadcasting of high-speed multimedia business, for example, video request program, television broadcasting, video conference, online education, interactive game or the like.Therefore, MBS will promote the development of following mobile data services.

IEEE aloft supports on the signaling of interface and the transfer of data MBS in 802.16e.The MBS transmission mode can be divided into single BS pattern and many BS pattern, and the notion in MBS territory is defined under many BS pattern.So-called set that the MBS territory is exactly a BS, the BS in this set must satisfy a condition: the multicast connection identifiers of using when sending the MBS data (MCID) must be consistent with Security Association (SA).Prior art does not have detailed description to single BS pattern; But under many BS pattern, how BS sends the MBS data, and how MS receives the MBS data, and how BS to notify MS the transmission of interested MBS data, and corresponding description is all arranged.

Mainly being described below of aerial interface in the existing system:

The first, the DL-MAP that broadcasting CID goes up broadcasting comprises zero to one or more MBS-MAP-IE, MBS-MAP-IE last each with MBS territory ID as sign.

The second, one MBS-MAP-IE identifies the physical resource of a MBS-MAP message of broadcasting on the air interface; If single BS pattern then directly the indication be the physical resource of MBS.

The three, one MBS-MAP message can comprise zero MBS-DATA-IE to one or more MBS-DATA-IE or expansion, the PHY parameter between these MBS-DATA-IE can unanimity also can be inconsistent, determine by network side; But a MBS-DATA-IE only has only a PHY parameter set.

Comprise one or more MCID among the four, one MBS-DATA-IE; Why requiring a MBS-DATA-IE to comprise one is for the consideration that reduces the MBS-MAP message-length to a plurality of MCID, and the pairing MCID of MBS data of identical DIUC is indicated in a MBS-DATA-IE.On transfer of data, exactly the identical MAC-PDU of DIUC (protocol Data Unit of media access control layer) is placed on the physical resource and transmits, though the data of different MBS have mixed in physical resource, can on the MAC layer, distinguish by the MCID on the MAC-PDU head.Not every MCID is corresponding to same MBS, but each MCID is corresponding to a MBS.

Among the five, one the expansion MBS-DATA-IE, a MCID also comprises one or more logic channels ID.Logic channel ID uses in the air interface, is used for informing whether the MBS data of the current indication of MS have its interested content.

In addition, DCD is last can carry zero to one or more MBS territory ID.According to the regulation of IEEE 802.16e to content ID: and MCID and this group information of logic channel ID are corresponding one by one.Identify the upper layer data stream of WiMAX Access Network service flow (Service Flow is called for short " SF ") carrying by content identification (Content ID).

DL-MAP message indicates the physical resource that next MBS-MAP message sends, but does not distinguish MCID and the logic channel ID that comprises in the MBS-MAP message; Indication to next MBS-MAP message physical resource is also arranged among the MBS-DATA-IE, be with the indication difference among the DL-MAP, the MBS-MAP message here is a special MBS-MAP message, wherein necessarily comprises a MBS-DATA-IE and has MCID consistent with current MBS-DATA-IE and logic channel ID.Like this, terminal just need not to receive one by one DL-MAP message, only needs just can know from current MBS-MAP-IE the delivery time of the next MBS-MAP message of being concerned about.

In addition, also have one among the MBS-DATA-IE and change indication,, just directly receive the MBS data if do not change; Otherwise need to resolve new MBS-DATA-IE, with the relevant MBS information of new terminal more.

Describe the air interface links layer in the existing standard and how to have carried MBS:

1, the air interface links layer can connect CID or multicast air interface connection MCID, the SF of a network side of carrying by the clean culture air interface;

2, the SF of network side identifies by SFID, and a SF can carry one or more high level data streams, and high level data stream is by Content ID sign.

But, only describe the air interface links layer in the prior art and how to have carried MBS, the service bearer scheme complete from the MBS server to terminal is not provided.That is to say, prior art does not provide the scheme of finishing, as not providing for a business from content service provider, how in the WiMAX network, to be carried and to be managed, not having to give the Content ID have definition is the sign of what object, MS add MBS to as if what, be an IP multicast group or a concrete Content, air interface connect carrying to as if what, and when carry a plurality of content ID or the like.And therefore the mode correspondence has been given in different carryings diverse solution, does not provide concrete solution in the prior art.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of bearer network, system and method for multicast broadcast service, makes the WiMAX network can carry the MBS business.

For achieving the above object, the invention provides a kind of bearer network of multicast broadcast service, comprise:

Connectivity serving network CSN, each Media Stream that is used for providing network from content respectively with a pair of → or many-to-one mode be carried on IP stream or IP multicast group;

Access service network ASN, be used for from each IP stream of CSN or IP multicast group respectively with one to one or many-to-one mode be carried on service flow, send to terminal by air interface.

Wherein, each described IP multicast group comprises at least one IP stream.

In addition, indicate described IP multicast group by the multicast broadcast service content identification.

In addition, each Media Stream offers at least one CSN;

Each IP stream sends at least one ASN and/or multicast broadcast service territory;

Each service flow SF is sent at least one base station BS in same ASN and/or the multicast broadcast service territory.

In addition, described IP stream identifies by one of following sign or its combination in any:

IP source address, IP destination address, service priority TOS/DSCP, protocol type, stream label, transmission control protocol TCP/ User Datagram Protoco (UDP) UDP source port number and TCP/UDP destination slogan.

In addition, same service flow uses a connection identifiers CID or multicast connection identifiers MCID to carry on the interface aloft, and same CID or MCID are sent at least one terminal.

In addition,, then distinguish LCID unique corresponding content identification on a CID or MCID at link layer with logical channel identifier LCID if a plurality of IP stream is carried on a CID or the MCID.

The present invention also provides a kind of bearing system of multicast broadcast service, comprises:

Multicast broadcast service server, each Media Stream that is used for providing network from content are respectively with one to one or many-to-one mode is carried on IP stream or the IP multicast group sends at least one multicast broadcast service agency;

Multicast broadcast service agency, be used for from least one IP stream of at least one multicast broadcast service server or IP multicast group respectively with one to one or many-to-one mode be carried on service flow and send at least one base station;

The base station is used for that described service flow is carried on different air interface connections and sends to terminal.

Wherein, described multicast broadcast service agency is arranged in access service network gateway.

In this external described system, described multicast broadcast service server according to one of following factor or its combination in any with media stream bearing in IP stream or IP multicast group:

Content provides the requirement of network, quality of service requirement, multicast broadcast service server own resource situation, CSN network resource status, the service strategy of Internet Service Provider NSP and the plan of operation of multicast broadcast service of Media Stream.

In this external described system, when the multicast broadcast service server uses the carrying of IP multicast group to provide the Media Stream of network from content, described multicast broadcast service server also is used for the distributing IP multicast address, makes up the IP multicast group, and at least one IP stream is carried on the IP multicast group transmits.

In this external described system, described multicast broadcast service agency is carried on IP stream or IP multicast group in the service flow according to one of following factor or its combination in any:

The quality of service requirement and the multicast broadcasting service authentication requirement of the division in multicast broadcast service planning requirement, multicast broadcast service territory, IP stream.

In this external described system, described multicast broadcast service planning requirement comprises:

Each IP stream that can be carried on same service flow is from same multicast broadcast service server and have identical Multimedia Broadcast Multicast Service KI; Perhaps,

Each IP stream that can be carried on same service flow requires to broadcast in same access service network during from same multicast broadcast service server and plan of operation.

In this external described system, the multicast broadcast service server is arranged in connectivity serving network.

The present invention also provides a kind of bearing method of multicast broadcast service, comprises following steps:

Each Media Stream that CSN will provide network from content respectively with one to one or many-to-one mode be carried in IP stream or the IP multicast group;

ASN will from each IP stream of CSN or IP multicast group respectively with one to one or many-to-one mode be carried in the service flow, send to terminal by air interface.

Wherein, according to one of following factor or its combination in any with media stream bearing in IP stream or IP multicast group:

Content provides the requirement of network, quality of service requirement, network resource status, Internet Service Provider's service strategy and the plan of operation of multicast broadcast service of Media Stream.

In this external described method, IP stream or IP multicast group are carried in the service flow according to one of following factor or its combination in any:

In this external described method, described terminal is that business object adds multicast broadcast service with the IP multicast group;

Carry a plurality of IP multicast group or IP multicast group when comprising a plurality of IP stream when a service flow, network side entity connects the upper-layer service of current transmission by distributing LCID in the link-layer identification air interface.

In this external described method, described terminal is that business object adds multicast broadcast service with IP stream;

When a service flow was carried a plurality of IP stream, network side entity connected the upper-layer service of current transmission by distributing LCID in the link-layer identification air interface.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, in CSN with each Media Stream respectively with one to one or many-to-one mode be carried in IP stream or the IP multicast group, in ASN with each IP stream or IP multicast group respectively with one to one or many-to-one mode be carried in the service flow.By this carrying model, can be carried on smoothly in the WiMAX network from the MBS business of content service provider, each interlayer service bearer has certain independence and independence, does not need to revise the WiMAX prior protocols.

Content identification both can have been indicated an IP stream, also can indicate the IP multicast group when the IP multicast group comprises and only comprise an IP stream.Thereby the clear and definite concrete object of content identification provides the mode of the another kind sign IP multicast group beyond the IP multicast address.

The object that clear and definite terminal adds MBS can be an IP multicast group, also can be an IP stream, and the mode of multiple adding MBS is provided.

Clear and definite air interface connect carrying to as if service flow, need distinguish a plurality of content identifications when a plurality of IP streams are carried on LCID when a MCID goes up.

The invention provides media stream bearing to IP stream or IP multicast group, and material elements that can foundation when IP stream or IP multicast group be carried to service flow, thereby make the present invention have more practicality.

Description of drawings

Fig. 1 is according to WiMAX network architecture schematic diagram in the prior art;

Fig. 2 is the bearer network schematic diagram according to the MBS of first embodiment of the invention;

Fig. 3 is the bearing system schematic diagram according to the MBS of second embodiment of the invention;

Fig. 4 is the bearing method flow chart according to the MBS of third embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

Among the present invention, each Media Stream that CSN will provide network from content respectively with one to one or many-to-one mode be carried in IP stream or the IP multicast group and be transferred to ASN, ASN will from each IP stream of CSN or IP multicast group respectively with one to one or many-to-one mode be carried in the service flow, send to terminal by air interface.The different data streams that each layer network can provide upper layer network is carried in the same data flow of this layer network, and also the different data streams that upper layer network can be provided is carried in the different data streams of this layer network.Concrete bearing mode is determined by network side entity.

According to above-mentioned principle, first execution mode of the present invention is described in detail below.First execution mode of the present invention relates to the bearer network of MBS, and the network carrying model of present embodiment as shown in Figure 2.

Specifically, in content service network, content and service provider provides one or more Media Streams to CSN, and this Media Stream can be represented a concrete business, as CCTV1 or Phoenix Satellite TV etc., also can represent the set of one group of business, as CCTV1～12 etc.Wherein, Media Stream is the basic service object that content and service provider offers MBS server (MBS Server).Same Media Stream can offer different CSN networks, and each Media Stream offers at least one CSN.

In CSN, the Media Stream that CSN uses IP stream or IP multicast group carrying upper layer network to provide, each IP multicast group comprises at least one IP stream.The CSN network can be with different media stream bearing in different IP stream, as

situation

1 and 2; Also can be in same IP stream, as situation 3 with different media stream bearing.Wherein, be meant can be by the one or more uniquely identified IP traffics in the IP source address in the IP message, IP destination address, service priority TOS/DSCP, protocol type, stream label (Flow Label), TCP (transmission control protocol)/UDP (User Datagram Protoco (UDP)) source port number, the TCP/UDP destination slogan for IP stream.

IP stream offers the basic service object of ASN network as the CSN network, each IP stream sends among at least one ASN and/or MBS territory (as the MBS zone of IEEE 802.16d/e definition), and same IP stream can send in different the ASN network and/or MBS territory.Different IP stream is by Content ID (content identification) sign of IEEE802.16d/e definition.

When using the IP multicasting technology, IP multicast address is distributed by CSN, and same IP multicast group can comprise one or more IP streams.When an IP multicast group comprised and only comprise an IP stream, Content ID also can be used to identify multicast group.Because the clear and definite concrete object of Content ID, so present embodiment provides the mode of the another kind sign IP multicast group beyond the IP multicast address.CSN can by the IP multicast path by or the tunnel style IP multicast message that will comprise one or more IP stream send in different the ASN network and/or MBS territory.

In ASN, IP stream or multicast group that ASN uses SF carrying upper layer network CSN to provide.ASN can be carried on different IP stream or multicast group among the different SF, as situation 1; Also different IP stream or multicast group can be carried among the same SF, as situation 2 and situation 3.

SF is as the basic service object in the ASN, and each SF sends at least one BS in same ASN and/or the MBS territory, and same SF can send to the different B S in same ASN and/or the MBS territory.

Different SF is by the SFID sign of IEEE 802.16d/e definition.MBS is the SF of MBS, just is meant a SF in the ASN network.

Aloft in the interface, same SF uses a CID or MCID to carry on the interface aloft, and same CID or MCID can send to different MS.When a plurality of IP streams are carried on the MCID, also need to use logical channel identifier LCID (Logical Channel ID is called for short " LCID ") to distinguish at link layer.LCID unique corresponding Content ID on a MCID.

If the operable code modulation mode of different MCID of same BS is identical, BS can transmit a plurality of MCID as required on same physical resource.

This shows that by above-mentioned carrying model, can be carried on smoothly in the WiMAX network from the MBS of content service provider, each interlayer service bearer has certain independence and independence, does not need to revise the WiMAX prior protocols.

What deserves to be mentioned is that according to the mode difference of terminal adding MBS, the business object that terminal adds has following several situation:

1) when terminal used the IP multicast to add MBS, the IP multicast group that CSN provides was the basic service object that terminal adds; When a SF carries a plurality of IP multicast group or multicast group when comprising a plurality of IP stream, when promptly a SF has comprised the data flow of a plurality of Content ID signs, network side entity also need distribute LCID, is used for connecting current which upper-layer service of having transmitted in this air interface of link-layer identification.

2) when terminal was carried Content ID adding MBS in use dynamic service flow establishment (DSA) process, the IP stream that CSN provides was the basic service object that terminal adds; When a SF carried a plurality of IP stream, network side entity also need distribute LCID, was used for connecting current which the IP stream that transmitted in this air interface of link-layer identification.

Because it can be an IP multicast group that terminal adds the object of MBS, also can be an IP stream, therefore, present embodiment provides the mode of multiple adding MBS for terminal.

Second execution mode of the present invention relates to the bearing system of MBS, as shown in Figure 3, comprises the MBS server, each Media Stream that is used for providing network from content respectively with one to one or many-to-one mode be carried on IP stream or IP multicast group; MBS agency, be used for from least one IP stream of at least one MBS server (MBS Server) or IP multicast group respectively with one to one or many-to-one mode be carried on SF, this MBS agency is arranged in the ASN gateway; BS is used for that the different SF from the MBS agency is carried on different air interface connections and sends to terminal.

Specifically, the MBS server is the supplier of MBS.The one or more Media Streams that provide from one or more content suppliers are provided the MBS server.According to the requirement of different content provider, the service quality of different media flows (Quality of Service, abbreviation " QoS ") resource situation and Internet Service Provider (the NetWork Service Procider of requirement, current MBS server and network, factors such as service strategy abbreviation " NSP "), MBS planning, Media Stream repacked be carried in the IP stream, finally send one or more ASN gateways to.

If use the IP multicast, then the MBS server also need be responsible for the distributing IP multicast address, make up the IP multicast group and one or more IP streams are carried on the IP multicast group and transmit.

MBS agency (MBS Proxy) entity is a functional entity of handling the MBS signaling in ASN network or the MBS territory for MS.This functional entity is usually located in the ASN gateway.

The ASN gateway is the entity in the ASN, one or more IP streams or the IP multicast group that provides from one or more MBS servers is provided the MBS agency of ASN gateway, and according to factors such as the qos requirement of the division in MBS planning requirement, MBS territory, IP stream, the requirements of MBS authentication, IP stream or IP multicast group repacked be carried among the SF, send to one or more BS.

Wherein, the MBS authentication requires to be meant, the ASN gateway is carried on these IP streams that need consider when same SF goes up whether from same MBS server and have identical MBS KI MAK, if just consideration can be carried with different IP stream on a SF.The MBS planning requirement is meant, the ASN gateway requires to broadcast in this ASN network when different IP stream is carried on these IP streams that need consider when same SF goes up whether from same MBS server and plan of operation, if just consideration can be carried on a SF.

BS is carried on different air interfaces with different SF and connects.Being to use the clean culture air interface to connect CID as for BS still is that multicast air interface connection MCID is determined by BS.BS can be carried on different air interface links layer connections on the same physical resource according to coding adjustment mode, finally sends to one or more MS.

By the MBS server in the present embodiment, MBS agency and base station, feasible MBS from content service provider can be carried in the WiMAX network smoothly, each interlayer service bearer has certain independence and independence, does not need to revise the WiMAX prior protocols.And present embodiment provides media stream bearing to IP stream or IP multicast group, and material elements that can foundation when IP stream or IP multicast group be carried to SF, thereby makes the present invention have more practicality.

The 3rd execution mode of the present invention relates to the bearing method of MBS, specifically as shown in Figure 4.

In step 410, each Media Stream that CSN will provide network from content respectively with one to one or many-to-one mode be carried in IP stream or the IP multicast group.Specifically, CSN provides factors such as the service strategy, MBS planning of the resource situation of the requirement of network, the qos requirement of different media flows, current MBS server and network and NSP according to different content, Media Stream repacked be carried in the IP stream, finally send one or more ASN gateways to.

Then, enter step 420, ASN will from each IP stream of CSN or IP multicast group respectively with one to one or many-to-one mode be carried among the SF, send to terminal by air interface.Specifically, ASN is according to factors such as the qos requirement of the division in MBS planning requirement, MBS territory, IP stream, the requirements of MBS authentication, IP stream or IP multicast group repacked be carried among the SF, sends to one or more BS.BS is carried on different air interfaces with different SF and connects.Being to use the clean culture air interface to connect CID as for BS still is that multicast air interface connection MCID is determined by BS.BS can be carried on different air interface links layer connections on the same physical resource according to coding adjustment mode, finally sends to one or more MS.

Be not difficult to find that can be carried on smoothly in the WiMAX network from the MBS of content service provider, each interlayer service bearer has certain independence and independence, does not therefore need to revise the WiMAX prior protocols.

Need to prove, if MS is that business object adds MBS with the IP multicast group, then carry a plurality of IP multicast group or IP multicast group when comprising a plurality of IP stream when a service flow, network side entity connects the upper-layer service of current transmission by distributing LCID in the link-layer identification air interface; If MS is that business object adds MBS with IP stream, then when a service flow was carried a plurality of IP stream, network side entity connected the upper-layer service of current transmission in the link-layer identification air interface by distribution LCID.Because it can be an IP multicast group that terminal adds the object of MBS, also can be an IP stream, therefore, present embodiment provides the mode of multiple adding MBS for terminal.

Though pass through with reference to some of the preferred embodiment of the invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims

1. the bearer network of a multicast broadcast service is characterized in that, comprises:

Connectivity serving network CSN, each Media Stream that is used for providing network from content respectively with one to one or many-to-one mode be carried on IP stream or IP multicast group;

2. the bearer network of multicast broadcast service according to claim 1 is characterized in that, each described IP multicast group comprises at least one IP stream.

3. the bearer network of multicast broadcast service according to claim 2 is characterized in that, indicates described IP multicast group by the multicast broadcast service content identification.

4. according to the bearer network of each described multicast broadcast service in the claim 1 to 3, it is characterized in that each Media Stream offers at least one described CSN.

5. according to the bearer network of each described multicast broadcast service in the claim 1 to 3, it is characterized in that each IP stream sends at least one described ASN and/or multicast broadcast service territory.

6. according to the bearer network of each described multicast broadcast service in the claim 1 to 3, it is characterized in that each service flow SF is sent at least one base station BS in same ASN and/or the multicast broadcast service territory.

7. according to the bearer network of each described multicast broadcast service in the claim 1 to 3, it is characterized in that described IP stream identifies by one of following sign or its combination in any:

8. according to the bearer network of each described multicast broadcast service in the claim 1 to 3, it is characterized in that, same service flow uses a connection identifiers CID or multicast connection identifiers MCID to carry on the interface aloft, and same CID or MCID are sent at least one terminal.

9. the bearer network of multicast broadcast service according to claim 8, it is characterized in that, if a plurality of IP streams are carried on a CID or the MCID, then distinguish LCID unique corresponding content identification on a CID or MCID at link layer with logical channel identifier LCID.

10. the bearing system of a multicast broadcast service is characterized in that, comprises:

11. the bearing system of multicast broadcast service according to claim 10 is characterized in that, described multicast broadcast service agency is arranged in access service network gateway.

12. the bearing system of multicast broadcast service according to claim 10 is characterized in that, described multicast broadcast service server according to one of following factor or its combination in any with media stream bearing in IP stream or IP multicast group:

13. bearing system according to each described multicast broadcast service in the claim 10 to 12, it is characterized in that, when described multicast broadcast service server uses the carrying of IP multicast group to provide the Media Stream of network from content, described multicast broadcast service server also is used for the distributing IP multicast address, makes up the IP multicast group, and at least one IP stream is carried on the IP multicast group transmits.

14. the bearing system according to each described multicast broadcast service in the claim 10 to 12 is characterized in that, described multicast broadcast service agency is carried on IP stream or IP multicast group in the service flow according to one of following factor or its combination in any:

15. the bearing system of multicast broadcast service according to claim 14 is characterized in that, described multicast broadcast service planning requirement comprises:

16. the bearing system according to each described multicast broadcast service in the claim 10 to 12 is characterized in that, described multicast broadcast service server is arranged in connectivity serving network.

17. the bearing method of a multicast broadcast service is characterized in that, comprises following steps:

Each Media Stream that CSN will provide network from content respectively with one to one or many-to-one mode be carried in IP stream or the IP multicast group, wherein, different media stream bearing is in different IP stream, perhaps different media stream bearing is in same IP stream;

18. the bearing method of multicast broadcast service according to claim 17 is characterized in that, according to one of following factor or its combination in any with media stream bearing in IP stream or IP multicast group:

19. the bearing method of multicast broadcast service according to claim 17 is characterized in that, according to one of following factor or its combination in any IP stream or IP multicast group is carried in the service flow:

20. the bearing method according to each described multicast broadcast service in the claim 17 to 19 is characterized in that, described terminal is that business object adds multicast broadcast service with the IP multicast group;

21. the bearing method according to each described multicast broadcast service in the claim 17 to 19 is characterized in that, described terminal is that business object adds multicast broadcast service with IP stream;