CN101115236B - Method for establishing MBMS bearing surface data transmission channel based on MBMS service area - Google Patents
Method for establishing MBMS bearing surface data transmission channel based on MBMS service area Download PDFInfo
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- CN101115236B CN101115236B CN2007101436588A CN200710143658A CN101115236B CN 101115236 B CN101115236 B CN 101115236B CN 2007101436588 A CN2007101436588 A CN 2007101436588A CN 200710143658 A CN200710143658 A CN 200710143658A CN 101115236 B CN101115236 B CN 101115236B
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Abstract
The invention provides a method of building an MBMS bearing surface data transmission channel based on an MBMS service area, which comprises that when MBMS-GW receives conversation start request that carries MBMS service areas and MBMS business multicast addresses from a broadcasting multicast business center, if the MBMS-GW finds out that an MBMS channel multicast address is not distributed to the MBMS service area, then an MBMS channel multicast address is distributed to the MBMS service area; the MBMS-GW transmits the MBMS channel multicast addresses to all access network base stations associated, if the access network base station does not build a multicast data transmission channel, then the MBMS channel multicast addresses are used to launch a request of entering the group, so that a multicast data transmission channel is built between the access network base station and the MBMS-GW; and furthermore, for all MBMS businesses which use MBMS service areas, the MBMS-GW uses multicast data transmission channels to send data.
Description
Technical field
The present invention relates to the communications field, more specifically, relate to a kind of method of setting up broadcasting multicast service (MBMS, Multimedia Broadcast/MulticastService) loading end data transmission channel based on the broadcast multicast services district.
Background technology
In order to effectively utilize mobile network resource, existing GSM has proposed to use the thought of multicast/broadcast transport service, i.e. MBMS.MBMS provides a data source to send the point-to-multipoint service of data to a plurality of users in the mobile network, realizes that Internet resources are shared, improves utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.
IP-based mechanism and the method for setting up multicast and broadcasting service and transmission system that world standardization has been organized ietf definition.If basic ideas are meant the user and want to receive the multicast IP data message, need before the message distribution, add multicast group, multicast group is tree, is made up of a series of routers, and the top is multicast source, also is data source, and the bottom is each user.Multicast source is dealt into next stage with data, and all add the data gateway or the router of multicast group, and router continues data to be forwarded to the gateway or the router of next stage again, up to the user class of lowermost end.
The method that the user adds multicast group is to accomplish through the JOIN process of Internet igmpinternet (IGMP, Internet Group Management Protocol) or multicast listener discovery agreement (MLD, Multicast Listener Discovery).For the bearer network of IPV4, use IGMP JOIN process to add multicast group, for the bearer network of IPV6, add multicast group through MLD JOIN process.The basic ideas of JOIN process are:
Each multicast service (in a certain period) all has a unique multicast address, and this multicast address is distributed by multicast source, and the user is that the parameter application adds multicast group with this address;
Multicast router in the IP network sends to multicast source according to configuration information with this user's JOIN request, oneself is set to a multicast router in the route of this multicast service simultaneously; And
During the data source distribution, the node that only is set to this professional multicast router just can continue to send notebook data, and other routers all abandon this multicast data message.
Thereby, reached and limited the purpose that message unrestrictedly spreads distribution.
The JOIN request is initiated through the user in the path of multicast pattern, dynamically sets up.And generally realize through static configuration in the path of broadcast mode, does not need the user before each distribution of services, to add multicast group.
No matter be multicast pattern, or broadcast mode, before professional the transmission, all there is a session to begin request message and is delivered to the network element each multicast path from service source, distribute relevant resource to notify each network element.Session begins message and comprises: multicast address information, session label information, the contents such as time that service region information, business begin to send; Network element receives session and begins message, can return a session and begin response message, and message is received in expression.
Session begins the message that message belongs to the signaling aspect, and the foundation of signaling paths static configuration is often accomplished.The business datum content belongs to the message of user level, and the foundation of data path can be to build through signaling, also can be to build through the IGMP/MLD agreement.
In order to set up the MBMS service path faster, reduce the waste of resource simultaneously, standardization body has developed the network architecture based on the MBMS of the evolution of next generation network framework (EMBMS), and some basic implementations.Fig. 1 is the network architecture sketch map of EMBMS.As shown in Figure 1, comprising:
ENodeB (Evolved NodeB) 102 is wireless access networks of evolution, and follow-on wireless access network can provide higher up-downgoing speed, lower transmission delay and reliable more wireless transmission;
MCE (Multi-Cell/Multicast Coordination Entity) 104 as the chain of command functional entity, is responsible for the chain of command signaling process, MBSFN (MBMS SingleFrequency Network) function and Radio Resource coordination etc.;
MBMS GW 106; MBMS gateway (MBMS GateWay) is divided into two parts in logic, and one is the signaling plane processing section; Gmb interface through shown in the figure is handled the contents such as conversation message from BM-SC; Also can with the signaling content of MCE connection processing data sync aspect, another is the user plane processing part of data, the data that BM-SC is sent send to the descending router of multicast group; And
BM-SC 108: broadcast multicast service center is as the distribution of the control of broadcast multicast service conversation, subscriber authorisation, safe key, and the convergent point of data source.
Wherein, BM-SC is connected with content service provider/broadcast group broadcast source (ContentProvider/Multicast Broadcast Source), accomplishes converging of data.
Basic ideas based on EMBMS business realizing mechanism are: the path of user level need be set up through IP multicast protocol (IGMP/MLD agreement).
An open question is at present: how to set up the muticast data transmission passage between eNodeB 102 and the MBMS-GW 106.Thereby, be badly in need of a kind of scheme, make user access service data and service switchover classification fast, and network resources waste is few as far as possible, safeguard simply, be convenient to the interpolation of new business.
Summary of the invention
Demand in view of prior art; The invention provides a kind of method of setting up broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district; It distributes MBMS channel multicast address by MBMS-GW to each MBMS coverage (MBMS Service Area), by eNodeB use this channel multicast address build through the IGMP/MLD agreement and MBMS-GW between multicast channel.
The invention provides a kind of method of setting up broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district; May further comprise the steps: step 1; When the multimedia broadcast-multicast service gateway receives that the session that carries the professional multicast address of MBMS coverage and MBMS from broadcast multicast service center begins to ask; If the multimedia broadcast-multicast service gateway discovery does not distribute MBMS channel multicast address for the MBMS coverage as yet; Then distribute a MBMS channel multicast address, as the IP address of the muticast data transmission passage between access network base stations and the multimedia broadcast-multicast service gateway for the MBMS coverage; Step 2; The multimedia broadcast-multicast service gateway passes to all access network base stations associated with MBMS channel multicast address; If access network base stations is not set up the muticast data transmission passage as yet; Then use MBMS channel multicast address to initiate, between access network base stations and multimedia broadcast-multicast service gateway, to set up a muticast data transmission passage into the group request; And step 3, use the MBMS of MBMS coverage professional for all, the multimedia broadcast-multicast service gateway uses the muticast data transmission passage to send data.
When the multimedia broadcast-multicast service gateway distributes a MBMS channel multicast address for the MBMS coverage; Set up the relation between the professional multicast address of MBMS, MBMS coverage and the MBMS channel multicast address; Wherein, The professional multicast address of one or more MBMS that belongs to same MBMS coverage is corresponding to a MBMS coverage, and the MBMS coverage is corresponding one by one with MBMS channel multicast address.
Wherein, when access network base stations is initiated into the group request to the multimedia broadcast-multicast service gateway, preserve MBMS channel multicast address.
In addition, the multimedia broadcast-multicast service gateway uses muticast data transmission passage transmission data to comprise: the multimedia broadcast-multicast service gateway receives the MBMS multicast packet by the professional multicast address designation of MBMS from broadcast multicast service center; The multimedia broadcast-multicast service gateway is according to MBMS coverage and the MBMS channel multicast address of the professional multicast address search of MBMS to correspondence; And multimedia broadcast-multicast service gateway use MBMS channel multicast address encapsulation MBMS multicast packet, and the MBMS multicast packet after access network base stations is transmitted encapsulation.
The method of setting up broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district according to the present invention also comprises: after access network base stations receives the MBMS multicast packet after the encapsulation from the multimedia broadcast-multicast service gateway; With the MBMS multicast packet deblocking after the encapsulation, to obtain the MBMS multicast packet; And access network base stations sends to corresponding user according to the professional multicast address of MBMS of sign MBMS multicast packet with the MBMS multicast packet.
When access network base stations build through the Internet igmpinternet and the multimedia broadcast-multicast service gateway between the muticast data transmission passage time, going into the group request is IGMP Join request; And when access network base stations find through multicast listener that agreement is built and the multimedia broadcast-multicast service gateway between the muticast data transmission passage time, going into the group request is MLD Join request.
Thereby; Through the present invention, between eNodeB and MBMS-GW, set up a common multicast channel, obtain simplifying thereby make the user insert the professional flow process of MBMS; The switching of user between different MBMS business is also more quick, has effectively promoted user's satisfaction.
Other features and advantages of the present invention will be set forth in specification subsequently, and, partly from specification, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the specification of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the network architecture sketch map of EMBMS;
Fig. 2 is a flow chart of setting up the method for broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district according to of the present invention; And
Fig. 3 is based under the EMBMS network architecture sketch map that loading end between the ENodeB and MBMS-GW is set up process.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
The present invention distributes the channel multicast address by MBMS-GW to each MBMS coverage; And begin message through session and pass to eNodeB; By eNodeB build through the IGMP/MLD agreement and MBMS-GW between the muticast data transmission passage, and through the relevant multicast packet of this muticast data transmission passage transmission.
Fig. 2 is a flow chart of setting up the method for broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district according to of the present invention.As shown in Figure 2, this method may further comprise the steps:
Step S102; When the multimedia broadcast-multicast service gateway receives that the session that carries the professional multicast address of MBMS coverage and MBMS from broadcast multicast service center begins to ask; If the multimedia broadcast-multicast service gateway discovery does not distribute MBMS channel multicast address for the MBMS coverage as yet; Then distribute a MBMS channel multicast address, as the IP address of the muticast data transmission passage between access network base stations and the multimedia broadcast-multicast service gateway for the MBMS coverage;
Step S104; The multimedia broadcast-multicast service gateway passes to all access network base stations associated with MBMS channel multicast address; If access network base stations is not set up the muticast data transmission passage as yet; Then use MBMS channel multicast address to initiate, between access network base stations and multimedia broadcast-multicast service gateway, to set up a muticast data transmission passage into the group request; And
Step S106, professional for the MBMS that uses the MBMS coverage, the multimedia broadcast-multicast service gateway uses the muticast data transmission passage to send data.
When the multimedia broadcast-multicast service gateway distributes a MBMS channel multicast address for the MBMS coverage; Set up the relation between the professional multicast address of MBMS, MBMS coverage and the MBMS channel multicast address; Wherein, The professional multicast address of one or more MBMS that belongs to same MBMS coverage is corresponding to a MBMS coverage, and the MBMS coverage is corresponding one by one with MBMS channel multicast address.
Wherein, when access network base stations is initiated into the group request to the multimedia broadcast-multicast service gateway, preserve MBMS channel multicast address.
In addition, the multimedia broadcast-multicast service gateway uses muticast data transmission passage transmission data to comprise: the multimedia broadcast-multicast service gateway receives the MBMS multicast packet by the professional multicast address designation of MBMS from broadcast multicast service center; The multimedia broadcast-multicast service gateway is according to MBMS coverage and the MBMS channel multicast address of the professional multicast address search of MBMS to correspondence; And multimedia broadcast-multicast service gateway use MBMS channel multicast address encapsulation MBMS multicast packet, and the MBMS multicast packet after access network base stations is transmitted encapsulation.
The method of setting up broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district according to the present invention also comprises: after access network base stations receives the MBMS multicast packet after the encapsulation from the multimedia broadcast-multicast service gateway; With the MBMS multicast packet deblocking after the encapsulation, to obtain the MBMS multicast packet; And access network base stations sends to corresponding user according to the professional multicast address of MBMS of sign MBMS multicast packet with the MBMS multicast packet.
When access network base stations build through the Internet igmpinternet and the multimedia broadcast-multicast service gateway between the muticast data transmission passage time, going into the group request is IGMP Join request; And when access network base stations find through multicast listener that agreement is built and the multimedia broadcast-multicast service gateway between the muticast data transmission passage time, going into the group request is MLD Join request.
Fig. 3 is based under the EMBMS network architecture sketch map that loading end between the ENodeB and MBMS-GW is set up process; Wherein, Session begins the bang path of message and has set up completion in advance, and MBMS GW is that session begins the gateway that message must approach, then MCE can transparent transmission message arrive relevant ENodeB; Also can control and arrive which ENodeB, ENodeB is the last network element that arrives.As shown in Figure 3, this method comprises following key step:
Step S302, BM-SC send session and begin to ask MBMS GW, have carried the professional multicast address of MBMS in the request message at least, the MBMS coverage;
Step S304, MBMS GW identifies this message, returns session to BM-SC and begins response message;
Step S306, MBMS-GW find not distribute the channel multicast address to this MBMS coverage as yet, then distribute a channel multicast address for it, and set up the corresponding relation between the professional multicast address of MBMS-MBMS coverage-MBMS channel multicast address three;
Step S308 carries out session and begins reciprocal process between MBMS-GW, MCE, the ENodeB, through this process, MBMS-GW is with the professional multicast address of MBMS, and parameters such as MBMS coverage, MBMS channel multicast address pass to eNodeB;
Step S310; ENodeB receives the channel multicast address; Find not set up multicast channel as yet, then use this MBMS channel multicast address to initiate IGMP (IPv4) or MLD (IPv6) Join request and add multicast group, set up the muticast data transmission passage between this eNodeB and the MBMS-GW;
Step S312, BM-SC sends the MBMS multicast packet to MBMS-GW, and this multicast packet is identified by the professional multicast address of MBMS;
Step S314; MBMS-GW is according to MBMS coverage and the MBMS channel multicast address of the professional multicast address search of this MBMS to correspondence; Use the original multicast data message of this MBMS channel multicast address encapsulation, message is mail to eNodeB through this multicast packet passage; And
Step S316; ENodeB receives multicast message through this multicast packet passage from MBMS-GW; With the multicast message decapsulation that has encapsulated MBMS channel multicast address; Take out original MBMS multicast packet, eNodeB is according to the professional multicast address of MBMS of this multicast packet of sign, judges and transmits this multicast packet and give corresponding user.
In sum, adopt method of the present invention, can make quick access service data of user and service switchover classification, and network resources waste seldom, safeguard simply, be convenient to the interpolation of new business.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. set up the method for broadcast multicast service carrier face data transmission channel based on the broadcast multicast services district for one kind, it is characterized in that, may further comprise the steps:
Step 1; When the multimedia broadcast-multicast service gateway receives that the session that carries the professional multicast address of MBMS coverage and MBMS from broadcast multicast service center begins to ask; If being said MBMS coverage as yet, said multimedia broadcast-multicast service gateway discovery do not distribute MBMS channel multicast address; Then be that a MBMS channel multicast address is distributed in said MBMS coverage, as the IP address of the muticast data transmission passage between access network base stations and the said multimedia broadcast-multicast service gateway;
Step 2; Said multimedia broadcast-multicast service gateway passes to all access network base stations associated with said MBMS channel multicast address; If said access network base stations is not set up the muticast data transmission passage as yet; Then use said MBMS channel multicast address to initiate, between said access network base stations and said multimedia broadcast-multicast service gateway, to set up a muticast data transmission passage into the group request; And
Step 3, professional for the MBMS that uses said MBMS coverage,
Said multimedia broadcast-multicast service gateway uses said muticast data transmission passage to send data.
2. method according to claim 1; It is characterized in that; At said multimedia broadcast-multicast service gateway is when a MBMS channel multicast address is distributed in said MBMS coverage; Set up the relation between the professional multicast address of said MBMS, said MBMS coverage and the MBMS channel multicast address; Wherein, the professional multicast address of one or more said MBMS that belongs to same MBMS coverage is corresponding to a said MBMS coverage, and said MBMS coverage is corresponding one by one with said MBMS channel multicast address.
3. method according to claim 1 and 2 is characterized in that, when said access network base stations is initiated into the group request to said multimedia broadcast-multicast service gateway, preserves said MBMS channel multicast address.
4. method according to claim 1 and 2 is characterized in that, said multimedia broadcast-multicast service gateway uses said muticast data transmission passage transmission data to comprise:
Said multimedia broadcast-multicast service gateway receives the MBMS multicast packet by the professional multicast address designation of said MBMS from said broadcast multicast service center;
Said multimedia broadcast-multicast service gateway is according to said MBMS coverage and the said MBMS channel multicast address of the professional multicast address search of said MBMS to correspondence; And
Said multimedia broadcast-multicast service gateway uses said MBMS channel multicast address to encapsulate said MBMS multicast packet, and the MBMS multicast packet after said access network base stations is transmitted encapsulation.
5. method according to claim 4 is characterized in that, also comprises:
After said access network base stations receives the MBMS multicast packet after the said encapsulation from said multimedia broadcast-multicast service gateway, with the MBMS multicast packet deblocking after the said encapsulation, to obtain said MBMS multicast packet; And
Said access network base stations sends to corresponding user according to the professional multicast address of the said MBMS of the said MBMS multicast packet of sign with said MBMS multicast packet.
6. method according to claim 1 and 2; It is characterized in that; When said access network base stations build through the Internet igmpinternet and said multimedia broadcast-multicast service gateway between said muticast data transmission passage the time, it is said that to go into the group request be the IGMPJoin request; And when said access network base stations find through multicast listener that agreement is built and said multimedia broadcast-multicast service gateway between said muticast data transmission passage the time, it is said that to go into the group request be MLD Join request.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1499762A (en) * | 2002-11-05 | 2004-05-26 | 北京三星通信技术研究有限公司 | Method for building wireless access loadbearing for MBMS services |
| CN1918823A (en) * | 2004-02-13 | 2007-02-21 | Lg电子株式会社 | Method for transmitting service information between network nodes for mbms service in mobile communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1499762A (en) * | 2002-11-05 | 2004-05-26 | 北京三星通信技术研究有限公司 | Method for building wireless access loadbearing for MBMS services |
| CN1918823A (en) * | 2004-02-13 | 2007-02-21 | Lg电子株式会社 | Method for transmitting service information between network nodes for mbms service in mobile communication system |
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