CN100428860C - Multimedia broadcast/multicast service linking method - Google Patents
Multimedia broadcast/multicast service linking method Download PDFInfo
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- CN100428860C CN100428860C CNB2006100336605A CN200610033660A CN100428860C CN 100428860 C CN100428860 C CN 100428860C CN B2006100336605 A CNB2006100336605 A CN B2006100336605A CN 200610033660 A CN200610033660 A CN 200610033660A CN 100428860 C CN100428860 C CN 100428860C
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Abstract
The present invention provides a method for linking a multimedia broadcasting/multicasting service (MBMS), which is suitable for the field of mobile communication. A CN transmits a linking request message to an RAN, and a TMGI list which is borne by an MBMS and added by user equipment is carried in the linking request message; when an MBMS bearing relationship is not established between the CN and the RAN, an IP multicasting address and an APN which are corresponding to the TMGI are carried in the linking request message. In an MBMS multicasting mode, the present invention simplifies the signaling process by adding the IP multicasting address and the APN information into an MBMS UE LINKING REQUEST message.
Description
Technical field
The invention belongs to moving communicating field, relate in particular in the multimedia broadcast/group broadcast service, CN initiates the method for link to RAN.
Background technology
Multicast and broadcasting are a kind of technology that transmits data message from a data source to a plurality of targets.Along with the fast development of Internet, a large amount of multimedia services emerge, and the some of them applied business requires a plurality of users can receive identical data, for example video request program, television broadcasting, video conference, online education or interactive game etc. simultaneously.Compare with general data, these multimedia services have characteristics such as data volume is big, longer duration, delay sensitive.Because the mobile network has particular network structure, functional entity and wave point, and is different with wired IP network, therefore present IP multicast service only is applicable to wired IP network, is not suitable for the mobile network.
In order to effectively utilize mobile network resource, third generation partnership project (Third GenerationPartnership Projects, 3GPP) multimedia broadcast/group broadcast service (MultimediaBroadcast/Multicast Service has been proposed, MBMS), promptly in the mobile network, provide a data source to send the point-to-multipoint service of data to a plurality of users, the realization Internet resources are shared, and improve utilization rate of network resource, especially air interface resource.The MBMS of 3GPP definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business.
The network reference model of MBMS as shown in Figure 1, the edge of MBMS bearer service is Gmb, Gi reference point, be broadcast/multicast service center (BM-SC) and Gateway GPRS Support Node (Gateway GPRSSupport Node, GGSN) interface between, the Gmb interface provides the chain of command function, and the Gi interface provides the user plane bearer function.
BM-SC is the inlet of content provider/multicast and broadcast content source, be used for authorizing and initiating the MBMS bearer service at mobile network, and plan transmits the MBMS content to schedule.Its function comprises third party content supplier authentication, mandate and charging; MBMS transmission relevant parameter is provided, for example service quality (Quality of Service, QoS), multicast and broadcast zone, initiation and termination MBMS transfer resource; Receive and transmit the MBMS content from external data source, arrange the MBMS session to transmit and inform user, session re-transmission etc.; Service statement comprises media description, conversation description such as multicast service identifier, address, delivery time etc.Content provider/multicast and broadcast content source can be passed through Packet Data Network, and (Packet DataNetwork PDN), provides content as internet to BM-SC.
GGSN is as the IP multicast service node of MBMS data, request according to BM-SC is broadcasting or multicast transmission foundation or release and Serving GPRS Support Node (Serving GPRS Supporting Node, SGSN) the MBMS carrying between, receive IP broadcast/multicast content from BM-SC or other data source, and (GPRS Tunneling Protocol, GTP) tunnel sends relevant SGSN to pass through GPRS Tunnel Protocol.
SGSN carries out network control to the user, support MBMS recipient moving between SGSN, request foundation or the carrying of the MBMS between release and the GGSN according to GGSN, send the broadcast/group broadcast data to Radio Access Network (Radio Access Network, RAN), as the Universal Terrestrial Radio Access Network road (Universal Terrestrial Radio Access Network, UTRAN), GSM EDGE Radio Access Network (GSM/EDGE Radio Access Network, GERAN).(Home Location Register HLR) obtains user profile to SGSN by attaching position register.
RAN is according to request foundation or the carrying of the MBMS between release and the SGSN of SGSN, select shared channel or dedicated channel to transmit the MBMS business in predetermined broadcasting/packet service zone, support core net to initiate and stop MBMS to transmit, support the MBMS recipient at radio network controller (Radio NetworkController, moving RNC), support MBMS transmission service statement, paging information, MBMS concurrent service, for example receive the MBMS video content and carry out audio call and messaging service simultaneously.
Subscriber equipment (User Equipment; UE) support activation MBMS business; content is encrypted and MBMS safety related functions such as consistency protection, receive MBMS service statement, paging information or support synchronous service and according to the MBMS session identification decision whether ignore the MBMS session.
In the network reference model of above-mentioned MBMS, Gn/Gp represents the interface between SGSN and the GGSN, Gi represent interface between BM-SC and the GGSN and interface protocol be Internet group management protocol of the multicast group (Internet Group Management Protocol, IGMP).Gmb represents that interface and the interface protocol between BM-SC and the GGSN is exclusively used in transmission MBMS signaling parameter.Gr represents the interface between SGSN and the HLR.Iu represents the interface between SGSN and the UTRAN.Iu/GGb represents the interface between SGSN and the GERAN.UE is connected communication with Um Interface with UTRAN, GERAN by Uu respectively.
More contents of the network reference model of relevant MBMS are referring to 3GPP TS 23.246 " 3rdGeneration Partnership Project; Technical Specification Group Services and SystemAspects; Multimedia Broadcast/Multicast Service (MBMS); Architecture andfunctional description ", the present invention quotes at this, repeats no more.
A MBMS business has a distribution tree during a session (Session), as shown in Figure 2.Tree root is at BM-SC, and leaf is that all prepare to receive this professional UE.No matter how many branches downstream node also has down, only has a branch between a upstream node and a downstream node, is called a MBMS carrying.All branches of a distribution number use same QoS.Except leaf node, other node is all preserved the tabulation of downstream node, when session data need issue, upstream node by and these downstream nodes between the MBMS carrying session data are mail to the downstream node of appointment.For each downstream node, only send a session data, continue distribution by downstream node again.
The main flow process of multicast service comprises that signatory (Subscription), service bulletin (Service announcement), adding (Joining), session begin (Session Start), MBMS notice (MBMS notification), transfer of data (Data transfer), conversation end (Session Stop) and leave the stages such as (Leaving) as shown in Figure 3.Wherein, Joining is the process that a contracted user adds multicast group, and promptly the user notification network wishes to receive the data of certain multicast service.In realization, the Joining process is finished by MBMS multicast exciting flow process, also is the process that a multicast distribution tree is set up.In this process, if downstream node is found and upstream node is not also set up the MBMS bearing relation, the downstream node tabulation that does not promptly add upstream node then joins in the downstream node tabulation of upstream node by register flow path, thereby joins in the multicast distribution tree.At this moment, only be to set up the MBMS bearing relation between downstream node and upstream node, and really do not set up the MBMS carrying of user's face, also do not distribute required resource for the MBMS carrying.When Session start, just really set up user's face MBMS carrying, distribute its required resource, certain QoS is provided, be used for the MBMS transmission session data.
The main flow process of broadcasting service is compared with the multicast flow process as shown in Figure 4, has lacked Subscription, Joining and Leaving flow process.Broadcasting user does not need to contract, and does not need to add specific broadcasting group yet, and the geographical position that needs only its place just can receiving broadcast service in broadcast domain.
More contents of the multicast of relevant above-mentioned MBMS, the main flow process of broadcasting service are referring to 3GPP TS23.246 " 3rd Generation Partnership Project; Technical Specification Group Servicesand System Aspects; Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description ", the present invention quotes at this, repeats no more.
In the MBMS multicast, (Core Network CN) links the RAN that (Linking) flow process offers MBMS UE context (Context) the Iu pattern by MBMS to core net.MBMS UElinking flow process is in PS (packet switching) territory mobile management at UE and connects (PMM CONNECTED) state, and triggers when meeting the following conditions:
(1), and there is a PS territory RAB (PS RAB) to be established when a UE that MBMS UE Context the arranged PMM CONNECTED state of moving into.
(2) add the MBMS multicast group by PS RAB as a UE who is in PMM CONNECTED state.
(3) UE is by service request (Service Request) the flow process PMM CONNECTED state of moving into.
3GPP TS 25.413 " 3rd Generation Partnership Project; Technical SpecificationGroup Radio Access Network; UTRAN Iu interface RANAP signaling " in the process of link flow process has been described, as shown in Figure 5:
CN sends linking request (MBMS UE LINKING REQUEST) message to RAN, Temporary Mobile Group Identity (the Temporary MobileGroup Identity that comprises the MBMS carrying that UE adds or leave in the message, TMGI) tabulation, and the MBMS carrying that adds for each UE, comprise its end-to-end (Point To Point, PTP) wireless access bearing sign (RAB ID).TMGI is used for MBMS carrying of global unique identification, it is equivalent to according to IP multicast address and APN (AccessPoint Name, APN) identify MBMS carrying jointly, promptly TMGI is with (there is relation one to one in IP multicast address between APN).
RAN returns link response (MBMS UE LINKING RESPONSE) message to CN.
RAN is by the MBMS bearing relation between register flow path foundation and the CN.The process of register flow path has been described among the 3GPP TS 25.413, as shown in Figure 6:
RAN sends MBMS register requirement (MBMS REGISTRATION REQUEST) message to CN, comprises TMGI, IP multicast address and APN in the message.CN returns MBMS registration response (MBMS REGISTRATION RESPONSE) message to RAN.
In said process, if when CN initiates the link flow process, also do not set up the MBMS bearing relation between RAN and the CN, RAN need initiate register flow path.And RAN does not have the information of IP multicast address and APN required in the register flow path, and RAN must remove to obtain MBMS again by other flow process and carry pairing IP multicast address and APN, has caused whole signaling flow process more complicated.
Summary of the invention
The object of the present invention is to provide a kind of method of multimedia broadcast/multicast service linking, be intended to solve exist in the prior art when CN initiates the link flow process, if also do not set up the MBMS bearing relation between RAN and the CN, RAN need obtain MBMS by other flow process and carry pairing IP multicast address and APN initiation register flow path, thereby causes the problem of whole signaling flow process more complicated.
The present invention realizes like this, a kind of method of multimedia broadcast/multicast service linking, CN sends link request message to RAN, carry the TMGI tabulation of the MBMS carrying that subscriber equipment adds in the message, when CN and RAN do not set up the MBMS bearing relation, carry IP multicast address corresponding and APN in the described link request message with TMGI.
Described IP multicast address and APN can be included in the TMGI tabulation of the MBMS carrying that subscriber equipment adds.
Described IP multicast address and APN are essential cell, perhaps
If the carrying of the MBMS between RAN and CN is not also set up, described IP multicast address and APN are the optional cell of condition.
Described IP multicast address cell comprises IP multicast address cell length and IP multicast address information field.
When described IP multicast address was the optional cell of condition, described IP multicast address cell further comprised IP multicast address source identity field.
Described APN cell comprises APN cell length and APN field.
When described APN was the optional cell of condition, described APN cell further comprised APN source identity field.
The present invention by increase IP multicast address and APN information in MBMS UE LINKING REQUEST message, has simplified signaling process under the MBMS multicast pattern.
Description of drawings
Fig. 1 is the network reference model figure of MBMS;
Fig. 2 is a MBMS service conversation distribution tree schematic diagram;
Fig. 3 is the stage schematic diagram of MBMS multicast service;
Fig. 4 is the stage schematic diagram of MBMS broadcasting service;
Fig. 5 is CN initiates realization flow figure from link to RAN;
Fig. 6 is RAN initiates realization flow figure from registration to CN;
Fig. 7 is CN provided by the invention initiates realization flow figure from link to RAN.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the present invention, when CN need send MBMS UE LINKING REQUEST to the RAN of Iu pattern, at first each the MBMS carrying that adds at UE judges whether CN has set up the MBMS bearing relation with RAN, it is the downstream node tabulation whether RAN has added CN, if also do not set up the MBMS bearing relation, then CN carries the IP multicast address and the APN of this TMGI correspondence, as shown in Figure 7 in mailing to the MBMS UE LINKING REQUEST message of RAN.Like this, RAN can not initiate register flow path by extra flow process.
As the first embodiment of the present invention, MBMS UE LINKING REQUEST message adopts following structure:
| IE/Group Name (cell title) | Presence (remarks) |
| MBMS UE LINKING REQUEST type of message | Essential |
| The TMGI tabulation of the MBMS carrying that adds | Optional |
| The TMGI tabulation of the MBMS carrying of leaving | Optional |
Wherein, the TMGI tabulation of the MBMS of adding carrying is the tabulation of following cell:
| IE/Group Name | Presence |
| TMGI | Essential |
| IP multicast address | Essential |
| APN | Essential |
| PTP RAB ID | Essential |
The IP multicast address coded format is as follows:
| The IP multicast address cell length |
| IP multicast address |
The length of " IP multicast address cell length " this cell of field identification follow-up " IP multicast address " field is unit with the byte.
" IP multicast address " field is the content of IP multicast address.
The APN coded format is as follows:
| The APN cell length |
| APN |
The length of " APN cell length " this cell of field identification follow-up " APN " field is unit with the byte.
" APN " field is the content of APN.
As the second embodiment of the present invention, MBMS UE LINKING REQUEST message adopts following structure:
| IE/Group Name | Presence |
| MBMS UE LINKING REQUEST type of message | Essential |
| The TMGI tabulation of the MBMS carrying that adds | Optional |
| The TMGI tabulation of the MBMS carrying of leaving | Optional |
Wherein " the TMGI tabulation of the MBMS carrying of adding " is the tabulation of following cell:
| IE/Group Name | Presence |
| TMGI | Essential |
| PTP RAB ID | Essential |
| IP multicast address | Condition is optional, if the carrying of the MBMS between RAN and CN is not also set up |
| APN | Condition is optional, if the carrying of the MBMS between RAN and CN is not also set up |
The IP multicast address coded format is as follows:
| The IP multicast address source identity |
| The IP multicast address cell length |
| IP multicast address |
" IP multicast address source identity " field is used to identify this cell.
The length of " IP multicast address cell length " this cell of field identification follow-up " IP multicast address " field is unit with the byte.
" IP multicast address " field is the content of IP multicast address.
The APN coded format is as follows:
| The APN source identity |
| The APN cell length |
| APN |
" APN source identity " field is used to identify this cell.
The length of " APN cell length " this cell of field identification follow-up " APN " field is unit with the byte.
" APN " field is the content of APN.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1, a kind of method of multimedia broadcast/multicast service linking, core net CN sends link request message to Radio Access Network RAN, carry the Temporary Mobile Group Identity TMGI tabulation of the multimedia broadcast/group broadcast service MBMS carrying that subscriber equipment adds in the message, it is characterized in that, when CN and RAN do not set up the MBMS bearing relation, carry IP multicast address corresponding with TMGI and APN APN in the described link request message, described IP multicast address and APN are included in the described TMGI tabulation.
2, the method for multimedia broadcast/multicast service linking as claimed in claim 1 is characterized in that, described IP multicast address and APN are essential cell, perhaps
If the carrying of the MBMS between RAN and CN is not also set up, described IP multicast address and APN are the optional cell of condition.
3, the method for multimedia broadcast/multicast service linking as claimed in claim 2 is characterized in that, described IP multicast address cell comprises IP multicast address cell length and IP multicast address information field.
4, the method for multimedia broadcast/multicast service linking as claimed in claim 3 is characterized in that, when described IP multicast address was the optional cell of condition, described IP multicast address cell further comprised IP multicast address source identity field.
5, the method for multimedia broadcast/multicast service linking as claimed in claim 2 is characterized in that, described APN cell comprises APN cell length and APN field.
6, the method for multimedia broadcast/multicast service linking as claimed in claim 5 is characterized in that, when described APN was the optional cell of condition, described APN cell further comprised APN source identity field.
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| CN102056294B (en) | 2009-11-09 | 2013-01-16 | 华为技术有限公司 | Method and device for maintaining service continuity through traffic offload function (TOF) entity |
| CN102123345B (en) * | 2011-01-27 | 2016-03-09 | 电信科学技术研究院 | The sending method of the positional information of a kind of MBMS, Apparatus and system |
| CN106302399A (en) * | 2016-07-29 | 2017-01-04 | 中兴通讯股份有限公司 | Control the method and system of multicast access, cloud desktop, cloud terminal |
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| US20050170842A1 (en) * | 2004-02-02 | 2005-08-04 | Bonnie Chen | Method and apparatus for providing a multimedia broadcast/multicast service in a visited network |
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Patent Citations (5)
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| CN1487756A (en) * | 2002-05-17 | 2004-04-07 | ���ǵ�����ʽ���� | Method for establishing signalling connection in mobile communication system |
| CN1482777A (en) * | 2002-06-25 | 2004-03-17 | Method and device for data broadcasting in third generation networks | |
| CN1203695C (en) * | 2002-08-13 | 2005-05-25 | 北京三星通信技术研究有限公司 | Production of temporary mobile group designation and distribution method |
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