CN101247541B - Method for implementing multimedia multicast service of mobile communications network - Google Patents
Method for implementing multimedia multicast service of mobile communications network Download PDFInfo
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Abstract
The invention relates to a method for realizing a mobile communication network media multicast business, comprising: a step 1 that a gateway node sends a notification message including a corresponding IP multicast address to a user device and a communication node which supports an IP multicast in the lower course; a step 2 that if the communication node receiving the notification message adds to a corresponding multicast group or all downstream nodes support the IP multicast, a step 3 is executed, if not after adding to the corresponding multicast group, the step 3 is executed; the step 3 that a multimedia server sends multimedia multicast business content to the communication node adding to the IP multicast group; a step 4 that the communication node sends the multimedia multicast business content to the downstream nodes which don't support the IP multicast or a user terminal. The invention can reach to beneficial technical effects of effectively saving up bandwidth, effectively reducing pressure for the communication node to transmit data, improving operating factor of network equipment and occupying coefficient of media resources, and increasing capacity of systems and expandability of business.
Description
Technical field
The present invention relates to the implementation method of multimedia multicast service, particularly the implementation method of multimedia multicast service of mobile communications network belongs to moving communicating field.
Background technology
Along with developing rapidly of mobile communication; The user no longer is satisfied with phone and messaging service to the demand of communication; A large amount of multimedia services emerge; The some of them applied business requires a plurality of users can receive identical data simultaneously, like video request program, television broadcasting, video conference, online education, interactive game etc.These mobile multi-media services are compared with general data, have characteristics such as data volume is big, longer duration, delay sensitive.For information series business and professional multicast and the broadcasting of high-speed multimedia that realizes the plain text low rate; And effectively utilize mobile network resource; Operator is usually through the mode in mobile communications network inner use multicast or broadcasting; Being embodied as the user provides the multimedia multicast service of two-forty; WCDMA (Wideband Code Division Multiple Access for example; Abbreviation WCDMA) broadcasting and the multicast service (Broadcastand Multicast Service is called for short BCMCS) in multimedia multicast in the network and broadcasting service (MBMS) and CDMA 2000 (Code DivisionMultiple Access2000 the is called for short CDMA2000) network.
Fig. 1 is existing mobile communications network sketch map (for example WCDMA, CDMA2000 or TD-SCDMA), couples together through the gateway node of IP network (can be the inner IP network of public ip network or operator) with a plurality of mobile communication subnets.Wherein connect the gateway node of mobile communication subnet and the gateway node (Gateway of IP network; Be called for short GW) (the gateway node GPRS Support Node of GPRS or WCDMA mobile communications network (gateway GPRS support node for example; Be called for short GGSN) equipment; And, have the equipment of identical function in the mobile communications network along with the mobile communication technology development) be responsible for making UE can visit IP network to subscriber equipment (User Equipment is called for short UE) distributing IP address.
Fig. 2 is the basis for existing multimedia multicast service of mobile communications network network frame sketch map with the existing mobile communication network framework, and on IP network, setting up one or more multimedia server is that subscriber equipment provides multimedia service.These multimedia multicast service of mobile communications network network frames mainly are optimized for the transmission of multi-medium data in mobile subnetwork inside.Meanwhile multimedia server is to the tabulation of gateway node of each service maintenance, and certain gateway node of record represent in the gateway node of mobile communication subnet of this gateway node correspondence in the tabulation has the user to need this business datum.When business at first; Multimedia server sends a business datum for the gateway node of the gateway node of each mobile communication subnet according to the gateway node information in the tabulation with the form of clean culture, thereby avoids sending business datum respectively to the subscriber equipment in the gateway node of mobile communication subnet.
Fig. 3 is the workflow diagram of existing multimedia multicast service of mobile communications network; At first by service statement of multimedia server issue; Show the service related information that it provides to subscriber equipment, comprise the IP address of server in this service statement, service related information etc.; Subscriber equipment is according to the service statement information of multimedia server issue then, the multimedia service that this subscriber equipment of gateway node of notice mobile communication subnet needs this multimedia server to provide; If this customer service application secures permission; Network will be set up data transmission channel for the user; Wherein the gateway node of the gateway node of mobile communication subnet will judge that it whether in the corresponding Service Gateway node listing of multimedia server, adds this professional gateway node tabulation if also have then send the registration message request to multimedia server.When business at first, multimedia server according to its gateway node tabulation confirm to send to those gateway nodes to multi-medium data, gateway node sends to subscriber equipment to the gateway node of data through the mobile communication subnet more according to this; No longer need this multimedia service at subscriber equipment; User device applies is stopped using this multimedia service; The gateway node of the gateway node of mobile communication subnet according to this subnet whether also the decision of this business datum of needs whether send the message that the cancellation data are sent to multimedia server; The release of data transmission channel also occurs in the multimedia service end of transmission, release data transmission channel when perhaps multimedia server no longer provides this multimedia service.
The weak point of this method is:
Said method makes and carrying out when certain business datum transmits, and multimedia server can be according to the gateway node information of safeguarding in the tabulation, for the gateway node of each mobile communication subnet that user's request is arranged sends a multimedia service data.Though the subscriber equipment that this method avoids multimedia server to be directed against in the gateway node of mobile communication subnet sends business datum respectively; But remain between multimedia server and the gateway node with mode of unicast and transmit data; Do not consider the transmission optimization between multimedia server and a plurality of gateway node; Repeat in the identical IP network of the data that mail to a plurality of gateway nodes between multimedia server and gateway node to transmit, referring to Fig. 2.Thereby caused the waste of IP network bandwidth resources, increased the load of multimedia server, and to influence the gateway node quantity that multimedia server can support be its extensibility.And, along with developing rapidly of multimedia multicast service, and the increase of gateway node number of using the mobile communication subnet of same business, above-mentioned defective also continues to increase to the influence of network bandwidth resources and extensibility thereupon.
Summary of the invention
The objective of the invention is deficiency to above-mentioned prior art; The implementation method of multimedia multicast service of mobile communications network is provided; Can effectively save bandwidth; Effectively reduce the pressure that communication node is transmitted data, improve network equipment utilance and media resource utilization rate, increase the capacity and the professional extensibility of system.
For realizing above-mentioned purpose, the invention provides a kind of implementation method of multimedia multicast service of mobile communications network, may further comprise the steps:
The gateway node of step 1, mobile communication subnet sends the notification message of the IP multicast address that comprises that this multimedia multicast service is corresponding to the communication node of the support IP in subscriber equipment and these gateway node downstream multicast; Said communication node sends a notification message to the communication node of the support IP in these communication node downstream multicast successively, with this multimedia multicast service of notice registration.Said communication node is can be through the mobile communication subnet to subscriber equipment (User Equipment; Abbreviation UE) node of transmission data; Comprise Gateway GPRS Support Node (the gateway GPRS support node in GPRS or the WCDMA mobile communications network; Abbreviation GGSN), serving GPRS support node (Service GPRS Support Node is called for short SGSN), radio network controller (Radio Network Controller is called for short RNC); Perhaps base station NodeB, IAD or access node.And along with mobile communication technology development, the equipment that has similar functions in the mobile communications network; Wherein, SGSN is the downstream node of GGSN, and RNC is the downstream node of SGSN; For example gateway node (like GGSN, the mobile communication subnetwork communicating node at the promptly upper reaches) is received when user applies is used the request of multimedia multicast service, will to its downstream node (SGSN) in, support message of downstream node transmission of IP multicast to notify; SGSN also can proceed such operation, does not perhaps all support the IP multicast up to the downstream node of certain communication node for the user;
If having added all downstream nodes of the corresponding multicast group of this multimedia multicast service or this communication node, step 2, the communication node of receiving said notification message all support the IP multicast; Then execution in step 3; Otherwise this communication node adds corresponding IP multicast group, and execution in step 3 then;
In technique scheme, further comprising the steps of before step 1:
Step a, said gateway node receive the message that is used to apply for using multimedia multicast service that subscriber equipment sends;
Step b, said gateway node judge whether to this multimedia multicast service of multimedia server registration, is execution in step 1 then, otherwise behind this multimedia multicast service of multimedia server registration execution in step 1.
Further; Step 4 can be specially: receive the content that the communication node of the content of said multimedia multicast service sends said multimedia multicast service to the communication node of not supporting the IP multicast or the user terminal in said these communication node downstream successively; The content of said multimedia multicast service sends to user terminal the most at last; Be after communication node is received content; Perhaps do not support the downstream node of IP multicast to send this content to user's (downstream node is the user), downstream node continues to transmit to be transmitted according to such strategy, and the content of said multimedia multicast service sends to user terminal the most at last.
The operation of the IP multicast group of communication node adding correspondence is specially in the step 2: communication node sends to the IP of correspondence multicast group and adds IP multicast group message, and adds corresponding IP multicast group.
In the technique scheme, can may further comprise the steps described in the step b to this multimedia multicast service of multimedia server registration:
Step b1, said gateway node send login request message to multimedia server, are used to register this multimedia multicast service;
Step b2, said multimedia server send register requirement to said gateway node receives the response, and is used to notify this gateway node registered this multimedia multicast service.
The corresponding IP multicast group of adding described in the step 2 can comprise: this communication node adds corresponding IP multicast group through multicast router mode or host mode.
Before said step a, also can comprise the operation of setting up said multicast group, specifically may further comprise the steps: at first in step a01, said multimedia server distributes corresponding IP multicast address and sets up corresponding multicast group for this multimedia multicast service; Then in step a02, send the multimedia multicast service assert message to the user, this message comprises the relevant information of said IP multicast address and this multimedia multicast service.Wherein, said multimedia multicast service assert message can send to subscriber equipment through the mobile network, also can convey to the user through other media (for example TV, newspaper etc.).
Can comprise also that after said step 4 said subscriber equipment stops using the operation of said multimedia multicast service; Specifically may further comprise the steps: in step 41; Said subscriber equipment sends message to the gateway node of the mobile communication subnet of correspondence, is used for application and stops using this multimedia multicast service; In step 42; If said user applies stops using the request of this multimedia multicast service to secure permission; The gateway node of said mobile communication subnet sends the application cancellation to said subscriber equipment and uses receiveing the response of this multimedia multicast service, is used to notify said subscriber equipment to stop using this multimedia multicast service; Then in step 43, the gateway node that the gateway node of said mobile communication subnet is corresponding judges whether that other subscriber equipment is using said multimedia multicast service in addition, is EO then, otherwise execution in step 44; In step 44, said gateway node sends the cancel register request message to said multimedia server, is used for notifying this gateway node need not receive said multimedia multicast service to said multimedia server; In step 45, said multimedia server sends the cancel register request to said gateway node receives the response; Then in step 46; Said gateway node receive said multimedia server receive the response the back to the corresponding multicast group of this multimedia multicast service send comprise said IP multicast address leave multicast group message, and notify communication node these gateway node downstream, that added this multicast group to leave this multicast group; Communication node these gateway node downstream, that added this multicast group sends to the corresponding multicast group of this multimedia multicast service and leaves multicast group message; And notify communication node these communication node downstream, that added this multicast group to leave this multicast group, by that analogy.
Further; After said step 4, also can comprise the operation that stops to serve after this multimedia multicast service finishes; Specifically may further comprise the steps: at first in step 501; Said multimedia server sends the cancel register request message to said gateway node, is used to notify this multimedia multicast service of said gateway node to finish; In step 502, said gateway node sends the cancel register request to said multimedia server receives the response then, sends to the corresponding multicast group of this multimedia multicast service then and leaves multicast group message; Then in step 503, said gateway node stops message through the gateway node of the mobile communication subnet of correspondence to said subscriber equipment transmission multimedia service, is used to notify said subscriber equipment to stop this multimedia multicast service.In step 504, the corresponding multicast group of said this multimedia multicast service of multimedia server deletion.
In the technique scheme; Before the multimedia multicast service of beginning mobile communications network; Set up multicast group by multimedia server; And when subscriber equipment need receive multimedia multicast service,, this gateway node is added in the corresponding multicast group of this multimedia multicast service through the gateway node of gateway node and the communicating by letter of multimedia server of mobile communication subnet; Then multimedia server transmits this multimedia multicast service content through the cast communication with said gateway node, and said gateway node then sends this multimedia multicast service content to subscriber equipment through the gateway node of mobile communication subnet; Thereby make and adopt the IP multicast mode to transmit the multimedia multicast service content between said multimedia server and the said gateway node.As shown in Figure 4, multimedia server is issued the same data flow of different gateway nodes and only need be sent once.And in the implementation method of the multimedia multicast service of mobile communications network of prior art; Owing to communicate by letter for mode of unicast between multimedia server and the gateway node; As shown in Figure 2, the same data flow that multimedia server is issued different gateway nodes need repeat to send at every turn.This shows; The implementation method of multimedia multicast service of mobile communications network provided by the invention can be through multimedia server and mobile communication subnet the cast communication of gateway node of gateway node; Reach effective saving bandwidth, improve the beneficial effect of network equipment utilance and media resource utilization rate; And make the gateway node that multimedia server can carry with the gateway node of more mobile communication subnet communicate, multicast the extensibility of multimedia server; Further; Pass through technique scheme; Gateway node and downstream node are not that the communication node of user terminal need repeatedly not duplicate the business datum of receiving and can send to downstream node; This can effectively reduce the pressure that communication node is transmitted data for the communication node that has a large amount of downstream nodes, increases the professional extensibility and the capacity of system.
In sum; The present invention is through organically combining mobile communication technology and IP cast communication technology; Can reach effective saving bandwidth; Effectively reduce the pressure that communication node is transmitted data, improve network equipment utilance and media resource utilization rate, the useful technique effect of the capacity of increase system and professional extensibility.
Description of drawings
Fig. 1 is the existing interconnected sketch map of mobile communications network;
Fig. 2 is existing multimedia multicast service of mobile communications network network frame sketch map;
Fig. 3 is the workflow diagram of existing multimedia multicast service of mobile communications network;
Fig. 4 is the implementation method sketch map of multimedia multicast service of mobile communications network of the present invention;
Fig. 5 is the flow chart of the specific embodiment of the invention one;
Fig. 6 is the flow chart of the specific embodiment of the invention two;
Fig. 7 is the flow chart of the specific embodiment of the invention three;
Fig. 8 is the flow chart of the specific embodiment of the invention four;
Fig. 9 is the professional workflow diagram of existing MBMS in the specific embodiment of the invention five;
Figure 10 is the professional network frame sketch map of existing MBMS in the specific embodiment of the invention five;
The flow chart that Figure 11 technical scheme of the present invention is used in the MBMS business;
Figure 12 sets up the flow chart of sharing multicast tree in the specific embodiment of the invention five;
Figure 13 is that subscriber equipment adds the flow chart of sharing multicast tree in the specific embodiment of the invention five;
Figure 14 is that subscriber equipment adds another flow chart of sharing multicast tree in the specific embodiment of the invention five;
Figure 15 is that subscriber equipment adds the another flow chart of sharing multicast tree in the specific embodiment of the invention five;
Figure 16 leaves the flow chart of sharing multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 17 leaves another flow chart of sharing multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 18 leaves the another flow chart of sharing multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 19 is for setting up the flow chart of active multicast tree in the specific embodiment of the invention five;
Figure 20 adds the flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 21 adds another flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 22 adds the another flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 23 leaves the flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 24 leaves another flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five;
Figure 25 leaves the another flow chart of active multicast tree for subscriber equipment in the specific embodiment of the invention five.
Figure 26 is the sketch map of MBMS service implementation method in the prior art;
Figure 27 is the sketch map of MBMS service implementation method in the specific embodiment of the invention five.
Embodiment
The present invention has organically combined mobile communication technology and IP cast communication technology; Multimedia server comes the gateway node transmission multimedia multicast service content to the gateway node of mobile communication subnet through the IP multicast mode, and the gateway node of the gateway node of mobile communication subnet transmits this multimedia multicast service content through mobile communications network to subscriber equipment.
The IP cast communication technology that at first the present invention is adopted is below briefly introduced:
IP multicast (also claiming multi-address broadcast or multicast) technology is that a kind of one or more main frame of permission (multicast source) once and side by side sends the TCP/IP network technology of single packet to multiple host.Multicast is one of effective ways of saving the network bandwidth as some communication to multiple spot.In the application of network audio/video broadcasting, in the time need the signal of a node being sent to a plurality of node, no matter be to adopt repetition point-to-point communication mode, still adopt broadcast mode, all can the serious waste network bandwidth, have only multicast to be only best choice.Multicast can make one or more multicast sources only send to specific multicast group to packet, and has only the main frame that adds this multicast group just can receive packet.
The IP cast communication must depend on IP multicast address, and it is a Class D IP address in IPv4, and scope and is divided into the local link multicast address, reserves three types of multicast address and administration authority multicast address from 224.0.0.0 to 239.255.255.255.Wherein, to 224.0.0.255, this is the address that keeps for Routing Protocol and other purposes to local link multicast address scope at 224.0.0.0, and router is not transmitted the I P bag that belongs to this scope; Reserve multicast address and be 224.0.1.0 to 238.255.255.255, can be used for global range (like Internet) or procotol; The administration authority multicast address be 239.0.0.0 to 239.255.255.255, can supply organization internal to use, be similar to private IP address, can not be used for Internet, can limit the multicast scope.
Use the All hosts of same IP multicast address receive multicast packet to constitute a host groups, be also referred to as multicast group.The member of a multicast group changes at any time, and a main frame can add or leave multicast group at any time, and the number of multicast member and the geographical position at place are also unrestricted, and a main frame also can belong to several multicast group.In addition, the main frame that does not belong to some multicast group also can send packet to this multicast group.
Transmit multicast packet in order to receive main frame, describe the path of IP multicast in transmission through network with the multicast distribution tree to all.The multicast distribution tree has two kinds of fundamental types: active tree and shared tree.Active tree is with the root of multicast source as active tree, and the branch of active tree forms through network and arrives the distribution tree that receives main frame, because active tree is run through network with the shortest path, so also often be called shortest path tree.Shared tree with some selectable multicast path in the multicast network by in a common root as shared tree, this velamen is called point (RP).Shared tree can be divided into unidirectional shared tree and bidirectional sharing tree again.Unidirectional shared tree refers to that multicast traffic stream must pass through shared tree and send to the multicast receiver from root.Bidirectional sharing tree refers to that multicast traffic stream can be without shared tree.
Multicast path by a kind of common thinking be exactly between multicast member the structure one the expansion distribution tree.Specific " transmission source, a purpose group " last IP flux of multicast all is transferred to the recipient through this expansion tree from the transmission source, this expansion tree has connected All hosts in this multicast group.Different IP multicast routing protocols uses different techniques to construct these multicast expansion trees, in case this tree structure is accomplished, all flux of multicast all will be propagated through it.
According to the distribution of multicast member in the network, generally speaking the IP multicast routing protocol can be divided into following two kinds of fundamental types.First kind of hypothesis multicast member is distributed in the network thick and fast; That is to say; The most subnet of network all comprises a multicast member at least; And the network bandwidth is enough big, and this being known as " dense mode " multicast routing protocol (Dense-Mode) depends on broadcast technology and sends the data to routers all in the network.Multicast path by second type be the sparse mode multicast routing protocol; Its hypothesis multicast member is sparse dispersion in network; And network can not provide enough transmission bandwidths, goes up through isdn line such as Internet to connect a large number of users that is dispersed in many different regions.In this case, thus broadcasting will waste many unnecessary network bandwidths and possibly cause serious network performance problems.So the sparse mode multicast routing protocol must depend on the technology with routing capability and set up and keep multicast tree.The sparse mode multicast routing protocol mainly comprises multicast protocol (the Core Based Tree based on kernel tree; Abbreviation CBT), sparse mode standalone protocol multicast (Protocol-Independent Multicast-Sparse Mode; Abbreviation PIM-SM), PIM source specific multicast (PIM-Source Specific Multicast is called for short PIM-SSM).
More than be to be briefly introduced,, technical scheme of the present invention done further detailed description below in conjunction with accompanying drawing and embodiment to what the IP cast communication technology that the present invention adopts did.
Fig. 5 has represented the flow chart of the specific embodiment of the invention one; The implementation method of multimedia multicast service of mobile communications network; May further comprise the steps: step 1 is used for application and uses multimedia multicast service for subscriber equipment sends message to the gateway node of mobile communication subnet; Step 2 is for said gateway node judges whether to this multimedia multicast service of multimedia server registration, is execution in step 3 then, otherwise behind this multimedia multicast service of multimedia server registration execution in step 3; Step 3 is sent the notification message of the IP multicast address that comprises that this multimedia multicast service is corresponding to the communication node of the support IP in said subscriber equipment and these gateway node downstream multicast for said gateway node; Said communication node sends a notification message to the communication node of the support IP in these communication node downstream multicast; By that analogy, be used for this multimedia multicast service of notice registration.Said communication node is can be through the mobile communication subnet to subscriber equipment (User Equipment; Abbreviation UE) node of transmission data; Comprise Gateway GPRS Support Node (the gateway GPRS support node in GPRS or the WCDMA mobile communications network; Abbreviation GGSN), serving GPRS support node (ServiceGPRS Support Node; Abbreviation SGSN), radio network controller (Radio Network Controller is called for short RNC), base station NodeB, IAD or access node.And along with mobile communication technology development, the equipment that has similar functions in the mobile communications network; Wherein, SGSN is the downstream node of GGSN, and RNC is the downstream node of SGSN; For example gateway node (like GGSN, the mobile communication subnetwork communicating node at the promptly upper reaches) is received when user applies is used the request of multimedia multicast service, will to its downstream node (SGSN) in, support message of downstream node transmission of IP multicast to notify; SGSN also can proceed such operation, does not perhaps all support the IP multicast up to the downstream node of certain communication node for the user; If step 4 is all supported the IP multicast for all downstream nodes that the communication node of receiving said notification message has added the corresponding multicast group of this multimedia multicast service or this communication node; Then execution in step 5; Otherwise this communication node sends to the IP of correspondence multicast group and adds IP multicast group message; And adding corresponding IP multicast group, execution in step 5 then; Step 5 is when business datum begins to transmit, the content that said multimedia server sends said multimedia multicast service with IP multicast mode to the said communication node that adds the IP multicast group; Step 6 is sent said multimedia multicast service for the communication node of content of receiving said multimedia multicast service to the downstream node of not supporting the IP multicast or user terminal content; By that analogy; Be after communication node is received content; Perhaps do not support the downstream node of IP multicast to send this content to user's (downstream node is the user), downstream node continues to transmit to be transmitted according to such strategy, and the content of said multimedia multicast service sends to user terminal the most at last.
In technique scheme, step 1 and 2 is optional.The operation of the IP multicast group of communication node adding correspondence is specially in the step 4: communication node sends to the IP of correspondence multicast group and adds IP multicast group message, and adds corresponding IP multicast group.In step 6; The communication node of content of receiving said multimedia multicast service is according to same strategy; Content to the communication node of not supporting the IP multicast or the user terminal in said these communication node downstream sends said multimedia multicast service finally sends to user terminal up to the content with said multimedia multicast service.
In this specific embodiment; Through in existing mobile communications network, increasing the communication process of the gateway node of corresponding user equipment and mobile communication subnet; And through between the gateway node of mobile communication subnet and multimedia server, adopting the mode of IP cast communication to transmit the multimedia multicast service content; Thereby organically combined mobile communication technology and IP cast communication technology; Reach the saving network bandwidth resources, improved network equipment utilance and media resource utilization rate, the beneficial effect of multicast extensibility.
Fig. 6 is the sketch map of the specific embodiment of the invention two; The implementation method of multimedia multicast service of mobile communications network; Be with the difference of the foregoing description two; Further comprising the steps of before said step 1: at first in step 01, said multimedia server distributes corresponding IP multicast address and sets up corresponding multicast group for this multimedia multicast service; Then in step 02, send the multimedia multicast service assert message to the user, this message comprises the relevant information of said IP multicast address and this multimedia multicast service.Wherein, said multimedia multicast service assert message can send to subscriber equipment through the mobile network, also can convey to the user through other media (for example TV, newspaper etc.).
This specific embodiment is through increasing the operating process of corresponding multimedia server, and the operating procedure of carrying out setting up in the IP cast communication process multicast group between gateway node and the multimedia server of gateway node of mobile communication subnet is provided further.
Flow chart referring to the specific embodiment of the invention shown in Figure 7 three; Be with the difference of specific embodiment one: can comprise also that after said step 6 said subscriber equipment stops using the operation of said multimedia multicast service; Specifically may further comprise the steps: step 61 is used for application and stops using this multimedia multicast service for said subscriber equipment sends message to the gateway node of the mobile communication subnet of correspondence; Step 62 is used receiveing the response of this multimedia multicast service for said gateway node sends the application cancellation to said subscriber equipment, is used to notify said subscriber equipment to stop using this multimedia multicast service; Step 63 is for said gateway node judges whether that in addition other subscriber equipment is using said multimedia multicast service, is EO then, otherwise execution in step 64; Step 64 is that said gateway node sends the cancel register request message to said multimedia server, is used for notifying this gateway node need not receive said multimedia multicast service to said multimedia server; Step 65 is receiveed the response for said multimedia server sends the cancel register request to said gateway node; Step 66 for said gateway node receive said multimedia server receive the response the back to the corresponding multicast group of this multimedia multicast service send comprise said IP multicast address leave multicast group message, and notify communication node these gateway node downstream, that added this multicast group to leave this multicast group; Communication node these gateway node downstream, that added this multicast group to the corresponding multicast group of this multimedia multicast service send comprise said IP multicast address leave multicast group message; And notify communication node these communication node downstream, that added this multicast group to leave this multicast group, by that analogy.
Fig. 8 is the flow chart of the specific embodiment of the invention four; The implementation method of multimedia multicast service of mobile communications network; The difference of itself and specific embodiment one is: after said step 6, also can comprise the operation that stops to serve after this multimedia multicast service finishes; Specifically may further comprise the steps: step 701 is used to notify this multimedia multicast service of said gateway node to finish for said multimedia server sends the cancel register request message to said gateway node; Step 702 is receiveed the response for said gateway node sends the cancel register request to said multimedia server, sends to the corresponding multicast group of this multimedia multicast service then and leaves multicast group message; Step 703 stops message for the mobile communication subnet of said gateway node through correspondence sends multimedia service to said subscriber equipment, is used to notify said subscriber equipment to stop this multimedia multicast service; Step 704 is the corresponding multicast group of said this multimedia multicast service of multimedia server deletion.
In the foregoing description one to four, said gateway node can be Gateway GPRS Support Node or IAD.Said communication node can be Gateway GPRS Support Node, serving GPRS support node, radio network controller, NodeB, IAD or access node.Described multimedia server can be broadcasting multicast service controller or multicast service server.
Embodiment five:
Below in conjunction with accompanying drawing, the embodiment that technical scheme of the present invention is used in multimedia multicast and broadcasting service (Multimedia Broadcast/Multicast Service is called for short MBMS) does to set forth in detail further.
MBMS provides a data source to send the point-to-multipoint service of data to a plurality of users in the mobile network, is used for realizing effectively Internet resources shared (comprising that mobile core network and access network resource are shared).MBMS is based on existing WCDMA or gsm communication network; Through increasing some new functional entitys such as broadcasting multicast service controller (Broadcast Multicast Service Center; Be called for short BM-SC); And packet domain functional entity in existing network such as Serving GPRS Support Node (Serving GPRSSupport Node; Abbreviation SGSN), gateway node GPRS Support Node (Gateway GPRS SupportNode is called for short GGSN), radio network controller (Radio Network Controller is called for short RNC) and subscriber equipment (User Equipment; Be called for short UE) increase corresponding M BMS functional module in waiting, defined new logic shared channel in addition and realized that interface-free resources is shared.
Fig. 9 is the professional workflow diagram of existing MBMS, and the MBMS operation flow comprises that contract process, service statement process, user of user adds multicast group process, registration process, session and begin process, transmission data procedures, conversation end process, user and leave process and de-registration procedure; Above-mentioned each process has the precondition of its startup respectively, sequential relationship between each process and on-fixed.The user sets up with content supplier in the signatory process of user and gets in touch, and it is professional to order MBMS.BM-SC normally initiates the service statement process with broadcast mode, notifies user MBMS professional relevant information, like geographic range, multicast group address, professional time started etc.The user can be through adding the multicast group process, transmits to BM-SC and want that the multicast group address that adds is professional to order corresponding M BMS, and the major function that adds the multicast group process is that BM-SC authorizes the user and charges.The user can register at BM-SC through registration process.BM-SC before sending the MBMS data to downstream node initiation session begin process; Be used to notify user conversation to begin and prepare to begin to receive the MBMS data; Session begins process and user, and to add the multicast group process separate, and new user still can add this multicast group after session began.BM-SC sends the MBMS multicast notification message with after notifying user MBMS data and arriving user side at once to ordering the professional user of this MBMS, starts and transmits data procedures.BM-SC is the initiation session terminal procedure after transmitting data procedures end, MBMS Data Transfer Done, is used to notify the user will end the MBMS transfer of data.When the user wants to withdraw from this MBMS business, initiate the user and leave process.The notice upstream node starts de-registration procedure when the corresponding tabulation of this multicast group of downstream node preservation is sky, perhaps starts de-registration procedure when this MBMS serves when BM-SC stops to transmit.
Figure 10 is the professional network frame sketch map of existing MBMS.Wherein, GGSN is the gateway node of mobile communication subnet and the gateway node of IP network, is used to UE distributing IP address, makes UE can visit IP network; SGSN and RNC mainly are responsible for resource management and control, are used to UE and with communicating by letter of GGSN passage are provided.BM-SC is the functional entity that increases newly, also is to realize that MBMS can run manageable crucial entity, and its function comprises: user management, session management, agency and transmission, professional declaration management, safety management.The edge of MBMS bearer service is Gmb and Gi reference point, i.e. two interfaces between BM-SC and the GGSN.The Gmb interface provides the chain of command function, and the Gi interface provides the user plane bearer function.The Gmb interface is the interface that increases newly, and other interface all is the interface that has existed in existing WCDMA network or the GSM network.3GPP has defined 8 kinds of Gmb interface commands, is used to realize the mutual of control information between BM-SC and the GGSN.In addition, to existing WCDMA/GSM Packet Based Network functional entity GGSN, SGSN, base station controller (RNC/BSC) and UE, also need increase MBMS correlation function and process.When realizing that MBMS is professional, content supplier sends to BM-SC with the MBMS data; BM-SC safeguards the tabulation of relevant GGSN, and the MBMS data are sent once to each relevant GGSN; GGSN safeguards the tabulation of relevant SGSN, and the MBMS data are sent once to each relevant SGSN; SGSN safeguards GSM EDGE Radio Access Network (GSM EDGE RADIOACCESS NETWORK; Be called for short GERAN) or UMTS Terrestrial radio access network (UMTS TerrestrialRadio Access Network; Abbreviation UTRAN) tabulation of relevant RNC/BSC in, and with the MBMS data to each relevant RNC transmission once; RNC/BSC sends the MBMS data to relevant UE.In the MBMS of reality network design, in order to utilize existing IP network device resource most effectively, and improve the utilization rate of media resource, in the whole network, dispose a plurality of BM-SC and a plurality of GGSN usually, and present the relation of multi-to-multi between BM-SC and the GGSN.
The flow chart that Figure 11 uses in the MBMS business for technical scheme of the present invention, the gateway node of the gateway node of the subnet of mobile communication described in the present embodiment is specially GGSN, and said multimedia server is specially BM-SC.GGSN is after receiving the application adding multicast group message that subscriber equipment sends; Judge at first whether this GGSN has added this multicast group; Be then to send message informing to have added this multicast group to subscriber equipment; Otherwise send adding multicast group message to BM-SC, be used to ask to add the professional corresponding multicast group of this MBMS; Said then BM-SC is according to predefined sparse mode IP multicast routing protocol, with said GGSN grafting in the corresponding multicast tree of said multicast group.Last said BM-SC is according to said predefined sparse mode IP multicast routing protocol, communicates by letter with said GGSN and transmits said MBMS business tine through said multicast tree.
Specify with regard to the method for carrying out the IP cast communication through shared multicast tree mode or active multicast tree mode between said BM-SC and the said GGSN respectively below:
(1) carry out the IP cast communication through sharing the multicast tree mode between said BM-SC and the said GGSN:
At first BM-SC sets up through following steps and shares multicast tree (referring to Figure 12): in step 01, BM-SC is the corresponding IP multicast address of said MBMS traffic assignments; Then in step 02, said BM-SC sends the multicast service assert message of the professional relevant parameter of the IP address that comprises said IP multicast address, said BM-SC and this MBMS to the GGSN in its downstream; Then in step 03, said BM-SC sends message via first hop router of this BM-SC to predefined point router, is used to notify said point to set up said multicast tree; In step 04, the professional corresponding shared multicast tree of this MBMS is set up and safeguarded to said point router according to said predefined sparse mode IP multicast routing protocol subsequently.
GGSN can add this multicast group in MBMS professional registration process or the session process that begins then:
When GGSN after BM-SC registration, just send a message that adds multicast group, as long as the downstream node of GGSN has the demand to this multicast group information, GGSN just remains in this multicast group always, for example in the PIM agreement, periodically sends PIM-Join message.Its step comprises (referring to Figure 13): in step 1a; The GGSN that needs to receive the MBMS business tine is after said BM-SC registration and receiving the register requirement response of said BM-SC transmission; Send adding multicast group message to said point router, be used to ask to add the professional corresponding multicast group of this MBMS; Subsequently in step 20, said point router is according to said sparse mode IP multicast routing protocol, with said GGSN grafting on said shared multicast tree.
After the BM-SC initiation session began message, GGSN also can add multicast group through send adding multicast group message to the point router.Wherein, First kind of situation is: transmit before the data, the BM-SC initiation session begins process, after GGSN receives that the session of BM-SC begins request; GGSN sends a session to BM-SC to begin to ask to receive the response; Send adding multicast group message to RP simultaneously, for example the transmission PIM-Join message of timing in the PIM agreement adds corresponding multicast group.Its step comprises (referring to Figure 14): in step 1b; The GGSN that needs to receive the MBMS business tine is after the session of receiving said BM-SC transmission begins request; Send adding multicast group message to said point router, be used to ask to add the professional corresponding multicast group of this MBMS; Subsequently in step 20, said point router is according to said sparse mode IP multicast routing protocol, with said GGSN grafting on said shared multicast tree.Second kind of situation is: the session of initiating as BM-SC begins; Simultaneously have new user to want to receive this MBMS business datum again, because the BM-SC maintenance is the tabulation of GGSN, the GGSN of this moment is not in the tabulation of BM-SC; So after GGSN receives that the register requirement of BM-SC transmission is responded; Send to add multicast group message to RP, regularly transmission PIM-Join message in the PIM agreement for example, grafting is on multicast tree.Its step comprises (referring to Figure 15): in step 1c; The GGSN that needs to receive the MBMS business tine is after the professional session of this MBMS that said BM-SC initiates begins; Send login request message to said BM-SC; And after the register requirement of receiving said BM-SC transmission was receiveed the response, the point router transmission adding multicast group message to said shared multicast tree was used to ask to add the professional corresponding multicast group of this MBMS; Then in step 2c, the point router of said shared multicast tree is according to said sparse mode IP multicast routing protocol, with said GGSN grafting on said shared multicast tree.
GGSN can leave said multicast group under following three kinds of situation then:
First kind is when the UE in DRNC downstream is sky, and DRNC sends the cancel register request to SGSN, and is same; When the downstream node among the SGSN is DRNC when being sky, just send the cancel register request, when the downstream node of GGSN is that SGSN is when being sky to GGSN; Though session this moment does not finish; But GGSN still sends the cancel register request message to BM-SC, and after GGSN received the cancel register request message that BM-SC sends, GGSN sent to RP and leaves multicast group message; For example in the PIM agreement, send PIM Prune message, leave corresponding multicast group.Its step comprises (referring to Figure 16): in step a 0, when said GGSN was empty in the corresponding downstream node tabulation of this multicast group of its preservation, said GGSN sent the cancel register request message to BM-SC; In step a1, after said GGSN received the cancel register request message that BM-SC sends, said GGSN sent to said point router and leaves multicast group message, is used for request and withdraws from this multicast group; In step a2, said point router is according to said sparse mode IP multicast routing protocol, with said GGSN beta pruning from said shared multicast tree then.
Second kind of situation is: GGSN is after receiving the cancel register request that BM-SC sends; GGSN sends the cancel register request to BM-SC receives the response; And send to RP and to leave multicast group message, for example send PIM-Prune message in the PIM agreement, multicast tree is carried out beta pruning.Its step comprises (referring to Figure 17): in step b0; Said GGSN is after receiving the cancel register request that said BM-SC sends; GGSN sends the cancel register request to BM-SC receives the response, and leaves multicast group message to said point router transmission, is used for request and withdraws from this multicast group; In step b1, said point router is according to said sparse mode IP multicast routing protocol, with said GGSN beta pruning from said shared multicast tree then.
The third situation is: work as Data Transfer Done; BM-SC initiation session terminal procedure; GGSN is after the conversation end request of receiving BM-SC, and GGSN sends the conversation end request to BM-SC receives the response, and leaves multicast group message to the RP transmission; For example send PIM-Prune message in the PIM agreement, multicast tree is carried out beta pruning.Its step comprises (referring to Figure 18): in step c0; Said GGSN is after receiving the conversation end request that said BM-SC sends; GGSN sends the conversation end request to BM-SC receives the response, and leaves multicast group message to said point router transmission, is used for request and withdraws from this multicast group; In step c1, said point router is according to said sparse mode IP multicast routing protocol, with said GGSN beta pruning from said shared multicast tree then.
When this MBMS service ending, BM-SC stops to send multicast packet, and deletion should be shared multicast tree.
(2) carry out the IP cast communication through active multicast tree mode between said BM-SC and the said GGSN:
At first BM-SC sets up active multicast tree (referring to Figure 19) through following steps: in step 001, said BM-SC is the corresponding IP multicast address of said MBMS traffic assignments; Then in step 002, said BM-SC sends the multicast service assert message of the professional relevant parameter of the IP address that comprises said IP multicast address, said BM-SC and this MBMS to the GGSN in its downstream; In step 003, said BM-SC sets up and safeguards the professional corresponding active multicast tree of this MBMS according to said predefined sparse mode IP multicast routing protocol afterwards.
GGSN can add this multicast group under following three kinds of situation then:
First kind of situation is: when GGSN after BM-SC registration; Just send a message that adds multicast group; As long as the downstream node of GGSN is the demand of this multicast group information sometimes, GGSN just remains in this multicast group always, for example the transmission PIM-Join message of timing in the PIM agreement.Its step comprises (referring to Figure 20): in step 1A; The GGSN that needs to receive the MBMS business tine is after said BM-SC registration and receiving the register requirement response of said BM-SC transmission; Send adding multicast group message to said BM-SC, be used to ask to add the professional corresponding multicast group of this MBMS; Then in said step 2A, said BM-SC is according to said predefined sparse mode IP multicast routing protocol, with said GGSN grafting on said active multicast tree.
Second kind of situation is: transmit before the data; The BM-SC initiation session begins process, and after GGSN received that the session of BM-SC begins request, GGSN sent to multicast router and adds multicast group message; For example the transmission PIM-Join message of timing in the PIM agreement adds corresponding multicast group.Its step comprises (referring to Figure 21): in step 1B; The GGSN that needs to receive the MBMS business tine is after the session of receiving said BM-SC begins request; Send adding multicast group message to predefined multicast router, be used to ask to add the professional corresponding multicast group of this MBMS; Then in step 2B, said BM-SC is according to said predefined sparse mode IP multicast routing protocol, with said GGSN grafting in said active multicast tree.
The third situation is: the session of initiating as BM-SC begins; Simultaneously have new user to want to add multicast group again, because the BM-SC maintenance is the tabulation of GGSN, the GGSN of this moment is not in the tabulation of BM-SC; So receive the register requirement of BM-SC at GGSN after; Send to add multicast group message to multicast router, regularly transmission PIM-Join message in the PIM agreement for example, grafting is on multicast tree.Its step comprises (referring to Figure 22): in step 1C; The GGSN that needs to receive the MBMS business tine is after the professional session of this MBMS that said BM-SC initiates begins; Send register requirement to said BM-SC; And after receiving the register requirement response that said BM-SC sends, send adding multicast group message to multicast router, be used to ask to add the professional corresponding multicast group of this MBMS; Then in step 2B, said BM-SC is according to said predefined sparse mode IP multicast routing protocol, with said GGSN grafting in said active multicast tree.
GGSN can leave said multicast group under following three kinds of situation then:
First kind of situation is when the UE in DRNC downstream is sky, and DRNC sends the cancel register request to SGSN, and is same; When the downstream node among the SGSN is DRNC when being sky, just send the cancel register request, when the downstream node of GGSN is that SGSN is when being sky to GGSN; Though session this moment does not finish; But GGSN still sends the cancel register request message to BM-SC, and after GGSN receives the cancel register request message that BM-SC sends, and GGSN will send to multicast router and leaves multicast group message; For example in the PIM agreement, send PIM Prune message, leave corresponding multicast group.Its step comprises (referring to Figure 23): in steps A 0, when said GGSN was empty in the corresponding downstream node tabulation of this multicast group of its preservation, said GGSN sent the cancel register request message to BM-SC; In steps A 1, after said GGSN received the cancel register request message that BM-SC sends, said GGSN sent the cancel register request to said multicast router, is used to leave said multicast group; In steps A 2, said multicast router is according to said predefined sparse mode IP multicast routing protocol, with said GGSN beta pruning from said active multicast tree then.
When second kind of situation is MBMS transmission service stopping; BM-SC sends the cancel register request message to GGSN; In this case, need be by the direct beta pruning of BM-SC, GGSN is after receiving the cancel register request message that BM-SC sends; GGSN sends the cancel register request to BM-SC receives the response, and stops to send PIMJoin message simultaneously.Its step comprises (referring to Figure 24): in step B0, when said BM-SC stops in this MBMS business, send the cancel register request message to said GGSN; In step B1, after said GGSN received said cancel register request, GGSN sends the cancel register request to BM-SC receiveed the response, and stops to send said adding multicast group message simultaneously then.
The third situation is in the conversation end process, the direct beta pruning of BM-SC, and GGSN stops to send PIM Join message after receiving the cancel register request that BM-SC sends.Its step comprises (referring to Figure 25): in step C0, said BM-SC sends the cancel register request to said GGSN behind the conversation end of this MBMS business; In step C1, after said GGSN receives said cancel register request, stop to send said adding multicast group message then.
When this MBMS service ending, BM-SC stops to send multicast packet, and this active multicast tree of deletion.
More than be the detailed elaboration of specific embodiment that technical scheme of the present invention is used in the MBMS business, explain further below in conjunction with accompanying drawing: compared with prior art, the useful technique effect that five of the specific embodiment of the invention can reach.
Referring to Figure 26, be the sketch map of existing MBMS service implementation method.Adopt mode of unicast to communicate between BM-SC and the GGSN; When the needs distributing data; BM-SC sends the MBMS data once to each relevant GGSN; Shown in figure 26, data transfer path a, data transfer path b and data transfer path c send to different GGSN from BM-SC with identical data, so the network between BM-SC and the GGSN all will be transmitted once the data of every transmission paths again.By above-mentioned visible; The defective of this method is not consider the transmission optimization between BM-SC and the GGSN; Between BM-SC and GGSN, remain with mode of unicast and transmit the MBMS data; Thereby greatly wasted IP network resource and bandwidth, and to influence the GGSN quantity that BM-SC can support be its extensibility.
Referring to Figure 27, be the MBMS service implementation method sketch map of the specific embodiment of the invention five.Adopt I P multicast mode to communicate between BM-SC and the GGSN, when distributing data, BM-SC only need send once for same data.Shown in figure 27, the network between BM-SC and the GGSN is only transmitted once for the same data of issuing a plurality of GGSN, thereby can reach effective saving bandwidth, improves network equipment utilance and media resource utilization rate, the useful technique effect of multicast extensibility.
Further; The specific embodiment of the invention five just technical scheme of the present invention should be used as detailed description in GSM network MBMS business; Those of ordinary skill in the art should be appreciated that technical scheme of the present invention also can likewise be applied to the realization of the multimedia multicast service in the cdma network, to reach effective saving bandwidth; Improve network equipment utilance and media resource utilization rate, the useful technique effect of multicast extensibility.In addition, the downstream node of RNC is a user terminal among the present mobile network MBMS, and the downstream node of RNC can be NodeB in the future, and the downstream node of NodeB is a user terminal, its technical scheme that the invention described above provided that stands good.Along with mobile network's development, possibly only keep IAD (Access Gateway is called for short AGW) and access node (Access Node among the mobile network in the future; Abbreviation AN) two network elements, wherein the function of GGSN is born by AGW, and the function of NodeB is born by AN; The function of SGSN and RNC is born by AGW and AN; AGW is a gateway node in this case, and AN is its downstream node, and the downstream node of AN is a user terminal.Those of ordinary skill in the art is to be understood that; Technical scheme of the present invention also can likewise be applied to the realization of the multimedia multicast service among this mobile network; To reach effective saving bandwidth; Improve network equipment utilance and media resource utilization rate, the useful technique effect of multicast extensibility, it all should be within technical scheme of the present invention scope required for protection.
It should be noted last that: above embodiment is only in order to explaining technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is specified with reference to above-mentioned preferred embodiment; Those of ordinary skill in the art is to be understood that: it still can make amendment or be equal to replacement technical scheme of the present invention, and this modification or be equal to spirit and the scope that replacement does not break away from technical scheme of the present invention.
Claims (17)
1. the implementation method of a multimedia multicast service of mobile communications network is characterized in that, comprising:
The gateway node of step 1, mobile communication subnet sends the notification message of the IP multicast address that comprises that this multimedia multicast service is corresponding to the communication node of the support IP in subscriber equipment and these gateway node downstream multicast; Said communication node sends a notification message to the communication node of the support IP in these communication node downstream multicast successively, with this multimedia multicast service of notice registration;
If having added all downstream nodes of the corresponding multicast group of this multimedia multicast service or this communication node, step 2, the communication node of receiving said notification message all support the IP multicast; Then execution in step 3; Otherwise this communication node adds corresponding IP multicast group, and execution in step 3 then;
Step 3, when business datum begins to transmit, the content that said multimedia server sends said multimedia multicast service with IP multicast mode to the said communication node that adds the IP multicast group;
Step 4, receive that the communication node of the content of said multimedia multicast service sends to the content of said multimedia multicast service the user terminal in these communication node downstream.
2. method according to claim 1 is characterized in that, and is further comprising the steps of before step 1:
Step a, said gateway node receive the message that is used to apply for using multimedia multicast service that subscriber equipment sends;
Step b, said gateway node judge whether to this multimedia multicast service of multimedia server registration, is execution in step 1 then, otherwise behind this multimedia multicast service of multimedia server registration execution in step 1.
3. method according to claim 1; It is characterized in that; Step 4 is specially: receive the content that the communication node of the content of said multimedia multicast service sends said multimedia multicast service to the communication node of not supporting the IP multicast or the user terminal in said these communication node downstream successively, the content of said multimedia multicast service sends to user terminal the most at last.
4. method according to claim 1 is characterized in that, the operation of the IP multicast group of communication node adding correspondence is specially in the step 2: communication node sends to the IP of correspondence multicast group and adds IP multicast group message, and adds corresponding IP multicast group.
5. method according to claim 2 is characterized in that, comprising to this multimedia multicast service of multimedia server registration described in the step b:
Step b1, said gateway node send login request message to multimedia server, are used to register this multimedia multicast service;
Step b2, said multimedia server send register requirement to said gateway node receives the response, and is used to notify this gateway node registered this multimedia multicast service.
6. method according to claim 1 is characterized in that, the corresponding IP multicast group of the adding described in the step 2 comprises: this communication node adds corresponding IP multicast group through the multicast router mode.
7. method according to claim 1 is characterized in that, the corresponding IP multicast group of the adding described in the step 2 comprises: this communication node adds corresponding IP multicast group through host mode.
8. method according to claim 2 is characterized in that, before said step a, also comprises the operation of setting up said multicast group, specifically comprises:
Step a01, said multimedia server distribute corresponding IP multicast address and set up corresponding multicast group for this multimedia multicast service;
Step a02, send the multimedia multicast service assert message to the user, this message comprises the relevant information of said IP multicast address and this multimedia multicast service.
9. method according to claim 1 is characterized in that, can comprise also that after said step 4 said subscriber equipment stops using the operation of said multimedia multicast service, specifically may further comprise the steps:
Step 41, said subscriber equipment send message to the gateway node of the mobile communication subnet of correspondence, are used for application and stop using this multimedia multicast service;
Step 42, said gateway node send the application cancellation to said subscriber equipment and use receiveing the response of this multimedia multicast service, are used to notify said subscriber equipment to stop using this multimedia multicast service;
Step 43, said gateway node judge whether that in addition other subscriber equipment is using said multimedia multicast service, are EOs then, otherwise execution in step 44;
Step 44, said gateway node send the cancel register request message to said multimedia server, are used for notifying this gateway node need not receive said multimedia multicast service to said multimedia server;
Step 45, said multimedia server send the cancel register request to said gateway node receives the response;
Step 46, said gateway node receive said multimedia server receive the response the back to the corresponding multicast group of this multimedia multicast service send comprise said IP multicast address leave multicast group message, and notify communication node these gateway node downstream, that added this multicast group to leave this multicast group; Communication node these gateway node downstream, that added this multicast group to the corresponding multicast group of this multimedia multicast service send comprise said IP multicast address leave multicast group message; And notify communication node these communication node downstream, that added this multicast group to leave this multicast group, by that analogy.
10. method according to claim 1 is characterized in that, after said step 4, also can comprise the operation that stops to serve after this multimedia multicast service finishes, and specifically may further comprise the steps:
Step 501, said multimedia server send the cancel register request message to said gateway node, are used to notify this multimedia multicast service of said gateway node to finish;
Step 502, said gateway node send the cancel register request to said multimedia server receives the response, and sends to the corresponding multicast group of this multimedia multicast service then and leaves multicast group message;
Step 503, said gateway node stop message through the mobile communication subnet of correspondence to said subscriber equipment transmission multimedia service, are used to notify said subscriber equipment to stop this multimedia multicast service;
Step 504, the corresponding multicast group of this multimedia multicast service of said multimedia server deletion.
11. according to the arbitrary described method of claim 1-10, it is characterized in that: said gateway node is Gateway GPRS Support Node or IAD.
12. according to the arbitrary described method of claim 1-10, it is characterized in that: said communication node is Gateway GPRS Support Node, serving GPRS support node, radio network controller, NodeB, IAD or access node.
13. according to the arbitrary described method of claim 1-10, it is characterized in that: described multimedia server is broadcasting multicast service controller or multicast service server.
14. method according to claim 13; It is characterized in that; This communication node described in the step 2 also comprises after the IP of correspondence multicast group is sent adding IP multicast group message: after said broadcasting multicast service controller is received said adding multicast group message; According to predefined sparse mode IP multicast routing protocol or particular source IP multicast routing protocol, with the Gateway GPRS Support Node grafting in the corresponding multicast tree of said multicast group.
15. method according to claim 14; It is characterized in that; Said step 3 comprises: when business datum begins to transmit; Said broadcasting multicast service controller is according to said predefined sparse mode IP multicast routing protocol or particular source IP multicast routing protocol, the content of sending said multimedia multicast service to the said communication node that adds the IP multicast group through said multicast tree.
16. method according to claim 15 is characterized in that: before step a, also comprise the operation of setting up said multicast tree, specifically comprise:
Step a11, said broadcasting multicast service controller are that said multimedia multicast and broadcasting service are distributed corresponding IP multicast address;
Step a12, said broadcasting multicast service controller send the multicast service assert message of the relevant parameter that comprises said IP multicast address and this multimedia multicast and broadcasting service to the gateway node in its downstream;
Step a13, said broadcasting multicast service controller send message via first hop router of this broadcasting multicast service controller to predefined point router, are used to notify said point to set up said multicast tree;
The shared multicast tree that this multimedia multicast and broadcasting service are corresponding is set up and safeguarded to step a14, said point router according to said predefined sparse mode IP multicast routing protocol.
17. method according to claim 15 is characterized in that: before step a, also comprise the operation of setting up said multicast tree, specifically comprise:
Step a21, said broadcasting multicast service controller are that said multimedia multicast and broadcasting service are distributed corresponding I P multicast address;
Step a22, said broadcasting multicast service controller send the multicast service assert message of the relevant parameter that comprises said IP multicast address and this multimedia multicast and broadcasting service to the gateway node in its downstream;
The active multicast tree that this multimedia multicast and broadcasting service are corresponding is set up and safeguarded to step a23, said broadcasting multicast service controller according to said predefined particular source IP multicast routing protocol.
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| CN106921634B (en) * | 2015-12-28 | 2020-11-20 | 中兴通讯股份有限公司 | Multimedia stream multicast method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005125118A1 (en) * | 2004-06-21 | 2005-12-29 | Matsushita Electric Industrial Co. Ltd. | Adaptive and scalable qos architecture for single-bearer multicast/broadcast services |
| CN1735065A (en) * | 2004-08-10 | 2006-02-15 | 华为技术有限公司 | Method for building bearing in multimedia broadcast/multicast service |
| CN1866896A (en) * | 2006-06-13 | 2006-11-22 | 中国移动通信集团公司 | Method for realizing mobile communication network multimedia enhancement service |
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