CN100421410C - Method for realizing mobile communication network multimedia enhancement service - Google Patents
Method for realizing mobile communication network multimedia enhancement service Download PDFInfo
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Abstract
The present invention relates to a method for realizing mobile communication network multimedia enhancement service, which comprises seven steps, wherein in the first step, a user facility applies for the use of multimedia reinforcement service to a mobile communication subnetwork; in the second step, the gateway of the mobile communication subnetwork judges whether the user facility have been added into a corresponding IP multicast set, if have, the sixth step is executed, and if have not, the third step is executed; in the third step, the gateway sends a login request message to a multimedia server; in the fourth step, the multimedia server sends a login request responding message to the gateway; in the fifth step, when the multimedia server permits the gateway to use the service, the gateway sends out a message of adding in the IP multicast set to the corresponding IP multicast set, when does not, the sixth step is executed; in the sixth step, the gateway sends a responding message to the user facility; in the seventh step, the multimedia server sends the content of the multimedia reinforcement service to the gateway in an IP multicast mode, and the gateway sends the content of the multimedia reinforcement service to the user facility through the mobile communication subnetwork. The present invention can effectively save bandwidth, and can raise the utilization rate of network facilities and the use rate of media resources.
Description
Technical field
The present invention relates to the implementation method of mobile communication network multimedia enhancement service, particularly can effectively save bandwidth, improve network equipment utilance and media resource utilization rate, strengthen the implementation method of the mobile communication network multimedia enhancement service of extensibility.
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, as 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 the information series business of realizing the plain text low rate and the multicast and the broadcasting of high-speed multimedia business, and effectively utilize mobile network resource, operator is usually by the mode in mobile communications network inner use multicast or broadcasting, being embodied as the user provides the multimedia enhancement service of two-forty, Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access for example, abbreviation WCDMA) multimedia multicast and broadcasting service (MBMS) and CDMA 2000 (the Code DivisionMultiple Access2000 in the network, abbreviation CDMA2000) broadcasting in the network and multicast service (Broadcastand Multicast Service is called for short BCMCS).
Fig. 1 couples together a plurality of mobile communication subnets by IP network (can be the public ip network or the IP network of operator inside) for existing mobile communications network schematic diagram (for example WCDMA, CDMA2000 or TD-SCDMA).Gateway (the Gateway that wherein connects mobile communication subnet and IP network, be called for short GW) (the Gateway GPRS Support Node of GPRS or WCDMA mobile communications network (gateway GPRSsupport node for example, be called for short GGSN) equipment, and along with the mobile communication technology development, the equipment that has identical function in the mobile communications network) be responsible for making UE can visit IP network to subscriber equipment (User Equipment is called for short UE) distributing IP address.
Fig. 2, sets up one or more multimedia server and provides multimedia service for subscriber equipment based on the existing mobile communication network framework for existing mobile communication network multimedia enhancement service network frame schematic diagram on IP network.These mobile communication network multimedia enhancement service network frames mainly are optimized for the transmission of multi-medium data in mobile subnetwork inside.Meanwhile multimedia server is at list of gateways of each service maintenance, and certain gateway of record is represented in the mobile communication subnet of this gateway 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 of each mobile communication subnet according to the gateway information in the tabulation with the form of clean culture, thereby avoids sending business datum respectively at the subscriber equipment in the mobile communication subnet.
Fig. 3 is the workflow diagram of existing mobile communication network multimedia enhancement service, 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 notified the mobile communication subnet multimedia service that this subscriber equipment needs this multimedia server to provide according to the service statement information of multimedia server issue then, and provides professional application required relevant information; If this customer service application secures permission, network will be set up data transmission channel for the user, wherein the gateway of mobile communication subnet will be judged it whether in the corresponding Service Gateway tabulation of multimedia server, if also have then do not add this professional list of gateways to the request of multimedia server transmission registration message.When business at first, multimedia server is determined multi-medium data is sent to those gateways according to its list of gateways, gateway sends to subscriber equipment to data by 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 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 send to multimedia server, the release of data transmission channel also occurs in the multimedia service end of transmission, discharges data transmission channel when perhaps multimedia server no longer provides this multimedia service.
The weak point of this method is:
The method of setting forth previously makes that multimedia server can be according to the gateway information of safeguarding in the tabulation, for each mobile communication subnet that user's request is arranged sends a multimedia service data when carrying out certain business datum transmission.Though this method avoids multimedia server to send business datum respectively at the subscriber equipment in the mobile communication subnet, but remain between multimedia server and the gateway with mode of unicast and transmit data, do not consider the transmission optimization between multimedia server and a plurality of gateway, repeat in the identical IP network of the data that mail to a plurality of gateways between multimedia server and gateway 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 quantity that multimedia server can support be its extensibility.And, along with developing rapidly of multimedia enhancement service, and the increase of using the mobile communication subnet number 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 provides a kind of implementation method of mobile communication network multimedia enhancement service at above-mentioned the deficiencies in the prior art, can effectively save bandwidth, improves network equipment utilance and media resource utilization rate, strengthens extensibility.
For achieving the above object, the invention provides a kind of implementation method of mobile communication network multimedia enhancement service, may further comprise the steps:
If this customer service application of step 2 secures permission, network is set up data transmission channel for the user, if this customer service application does not secure permission then finishes; Wherein the gateway of mobile communication subnet judges whether this gateway has added the multicast group of this multimedia enhancement service correspondence, is execution in step 6 then, otherwise execution in step 3;
Whether step 4, described multimedia server send register requirement to described gateway and receive the response, be used for notice and permit this gateway to use this multimedia enhancement service;
The registration message that step 5, described gateway receive described multimedia server is receiveed the response, and receive the response according to this registration message and to judge whether described multimedia server permits this gateway to use this multimedia enhancement service, be then to send to add multicast group message to the multicast group of this multimedia enhancement service correspondence, execution in step 6 then, otherwise execution in step 6;
Further, before described step 1, also can comprise the operation of setting up described multicast group, specifically may further comprise the steps: at first in step 01, described multimedia server distributes corresponding IP multicast address and sets up corresponding multicast group for this multimedia enhancement service; Then in step 02, send the multimedia enhancement service assert message to the user, this message comprises the relevant information of described IP multicast address and this multimedia enhancement service.Wherein, described multimedia enhancement service assert message can send to subscriber equipment by the mobile network, also can convey to the user by other media (for example TV, newspaper etc.).
Can comprise also that after described step 7 described subscriber equipment stops using the operation of described multimedia enhancement service, specifically may further comprise the steps: in step 81, described subscriber equipment sends message to the mobile communication subnet of correspondence, be used for application and stop using this multimedia enhancement service, and provide professional application required relevant information; In step 82, if described user applies stops using the request of this multimedia enhancement service to secure permission, described mobile communication subnet sends the application cancellation to described subscriber equipment and uses receiveing the response of this multimedia enhancement service, is used to notify described subscriber equipment to stop using this multimedia enhancement service; Then in step 83, the gateway of described mobile communication subnet correspondence judges whether that other subscriber equipment is using described multimedia enhancement service in addition, is EO then, otherwise execution in step 84; In step 84, described gateway sends the cancel register request message to described multimedia server, is used for notifying this gateway not need to receive described multimedia enhancement service to described multimedia server; In step 85, described multimedia server sends the cancel register request to described gateway and receives the response; In step 86, described gateway sends to the multicast group of this multimedia enhancement service correspondence in the back of receiveing the response of receiving described multimedia server and leaves multicast group message then.
Further, after described step 7, also can comprise the operation that stops to serve after this multimedia enhancement service finishes, specifically may further comprise the steps: at first in step 801, described multimedia server sends the cancel register request message to described gateway, is used to notify this multimedia enhancement service of described gateway to finish; In step 802, described gateway sends the cancel register request to described multimedia server and receives the response, and sends to the multicast group of this multimedia enhancement service correspondence then and leaves multicast group message then; Then in step 803, described gateway stops message by the mobile communication subnet of correspondence to described subscriber equipment transmission multimedia service, is used to notify described subscriber equipment to stop this multimedia enhancement service.In 804 steps, described multimedia server selects whether to delete the multicast group of this multimedia enhancement service correspondence.
In the technique scheme, before the multimedia enhancement service of beginning mobile communications network, set up multicast group by multimedia server, and when subscriber equipment need receive multimedia enhancement service, by the gateway of mobile communication subnet and communicating by letter of multimedia server, this gateway is added in the multicast group of this multimedia enhancement service correspondence, then multimedia server transmits this multimedia enhancement service content by the cast communication with described gateway, and described gateway then sends this multimedia enhancement service content to subscriber equipment by the mobile communication subnet; Thereby make and adopt the IP multicast mode to transmit the multimedia enhancement service content between described multimedia server and the described gateway.As shown in Figure 4, the multimedia server same data flow of issuing different gateways only need send once.And in the implementation method of the mobile communication network multimedia enhancement service of prior art, owing to communicate by letter for mode of unicast between multimedia server and the gateway, as shown in Figure 2, the same data flow that multimedia server is issued different gateways need repeat transmission at every turn.This shows, the implementation method of mobile communication network multimedia enhancement service provided by the invention can be by multimedia server and mobile communication subnet the cast communication of gateway, reach effective saving bandwidth, improve the beneficial effect of network equipment utilance and media resource utilization rate; And make the gateway that multimedia server can carry with more mobile communication subnet communicate further, strengthened the extensibility of multimedia server.
In sum, the present invention can reach effective saving bandwidth by organically in conjunction with mobile communication technology and IP cast communication technology, improves network equipment utilance and media resource utilization rate, strengthens the beneficial effect of extensibility.
Description of drawings
Fig. 1 is the existing interconnected schematic diagram of mobile communications network;
Fig. 2 is existing mobile communication network multimedia enhancement service network frame schematic diagram;
Fig. 3 is the workflow diagram of existing mobile communication network multimedia enhancement service;
Fig. 4 is the implementation method schematic diagram of mobile communication network multimedia enhancement service 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 workflow diagram of existing MBMS business in the specific embodiment of the invention five;
Figure 10 is the network frame schematic diagram of existing MBMS business 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 schematic diagram of MBMS service implementation method in the prior art;
Figure 27 is the schematic diagram of MBMS service implementation method in the specific embodiment of the invention five.
Embodiment
The present invention organically combines mobile communication technology and IP cast communication technology, multimedia server transmits the multimedia enhancement service content to the gateway of mobile communication subnet by the IP multicast mode, and the gateway of mobile communication subnet transmits this multimedia enhancement service content by mobile communications network to subscriber equipment.
The IP cast communication technology that at first the present invention is adopted is briefly introduced below:
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 the signal of a node need being sent to a plurality of node, no matter be to adopt to repeat the 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 packet be sent to specific multicast group, 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 multicast address and administration authority multicast address three classes from 224.0.0.0 to 239.255.255.255.Wherein, to 224.0.0.255, this is the address for Routing Protocol and the reservation of other purposes to local link multicast address scope at 224.0.0.0, and router is not transmitted the IP 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 (as Internet) or procotol; The administration authority multicast address be 239.0.0.0 to 239.255.255.255, can use for organization internal, 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 that the IP multicast transmits in 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 by 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 send to the multicast receiver from root through shared tree.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 by this expansion tree from the transmission source, this expansion tree has connected All hosts in this multicast group.Different I P multicast routing protocols uses different technology to construct these multicast expansion trees, in case this tree structure is finished, all flux of multicast all will be propagated by 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 by 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 may 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 briefly introducing that the IP cast communication technology that the present invention adopts is done,, technical scheme of the present invention be described in further detail below in conjunction with drawings and Examples.
Fig. 5 has represented the flow chart of the specific embodiment of the invention one, a kind of implementation method of mobile communication network multimedia enhancement service, may further comprise the steps: step 1 sends message for subscriber equipment to the mobile communication subnet, be used for application and use multimedia enhancement service, and provide professional application required relevant information; Step 2 is that if this customer service application secures permission, network is set up data transmission channel for the user, if this customer service application does not secure permission then finishes; Wherein the gateway of mobile communication subnet judges whether this gateway has added the multicast group of this multimedia enhancement service correspondence, is execution in step 6 then, otherwise execution in step 3; Step 3 sends login request message for described gateway to multimedia server, is used to inquire whether this gateway can use this multimedia enhancement service; Whether step 4 is receiveed the response for described multimedia server sends register requirement to described gateway, be used for notice and permit this gateway to use this multimedia enhancement service; Step 5 is receiveed the response for the registration message that described gateway receives described multimedia server, and receive the response according to this registration message and to judge whether described multimedia server permits this gateway to use this multimedia enhancement service, be then to send to add multicast group message to the multicast group of this multimedia enhancement service correspondence, execution in step 6 then, otherwise execution in step 6; Step 6 is used receiveing the response of this multimedia enhancement service for described gateway sends application to described subscriber equipment, is used to notify whether this multimedia enhancement service of licensed use of described subscriber equipment; If this multimedia enhancement service of the licensed use of this subscriber equipment then execution in step 7, otherwise finish; Step 7 is for when business datum begins to transmit, described multimedia server transmits corresponding multimedia enhancement service content in IP multicast mode to described gateway, and described gateway receives this multimedia enhancement service content after send to described subscriber equipment by the mobile communication subnet.
In this specific embodiment, by in existing mobile communications network, increasing the communication process of the gateway of corresponding user equipment and mobile communication subnet, and by between the gateway of mobile communication subnet and multimedia server, adopting the mode of IP cast communication to transmit the multimedia enhancement service content, thereby organically combine mobile communication technology and IP cast communication technology, reached the saving network bandwidth resources, improve network equipment utilance and media resource utilization rate, strengthen the beneficial effect of extensibility.
Fig. 6 is the schematic diagram of the specific embodiment of the invention two, a kind of implementation method of mobile communication network multimedia enhancement service, may further comprise the steps: at first in step 01, described multimedia server distributes corresponding IP multicast address and sets up corresponding multicast group for this multimedia enhancement service; Then in step 02, send the multimedia enhancement service assert message to the user, this message comprises the relevant information of described IP multicast address and this multimedia enhancement service.Wherein, described multimedia enhancement service assert message can send to subscriber equipment by the mobile network, also can convey to the user by other media (for example TV, newspaper etc.); Then in step 1, subscriber equipment sends message to the mobile communication subnet, is used for application and uses multimedia enhancement service, and provide professional application required relevant information; Step 2 is that if this customer service application secures permission, network is set up data transmission channel for the user, if this customer service application does not secure permission then finishes; Wherein the gateway of mobile communication subnet judges whether this gateway has added the multicast group of this multimedia enhancement service correspondence, is execution in step 6 then, otherwise execution in step 3; Step 3 sends login request message for described gateway to multimedia server, is used to inquire whether this gateway can use this multimedia enhancement service; Whether step 4 is receiveed the response for described multimedia server sends register requirement to described gateway, be used for notice and permit this gateway to use this multimedia enhancement service; Step 5 is receiveed the response for the registration message that described gateway receives described multimedia server, and receive the response according to this registration message and to judge whether described multimedia server permits this gateway to use this multimedia enhancement service, be then to send to add multicast group message to the multicast group of this multimedia enhancement service correspondence, execution in step 6 then, otherwise execution in step 6; Step 6 is used receiveing the response of this multimedia enhancement service for described gateway sends application to described subscriber equipment, is used to notify whether this multimedia enhancement service of licensed use of described subscriber equipment; If this multimedia enhancement service of the licensed use of this subscriber equipment then execution in step 7, otherwise finish; Step 7 is for when business datum begins to transmit, described multimedia server transmits corresponding multimedia enhancement service content in IP multicast mode to described gateway, and described gateway receives this multimedia enhancement service content after send to described subscriber equipment by the mobile communication subnet.
This specific embodiment is by 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 the gateway of mobile communication subnet and the multimedia server is provided further.
Flow chart referring to the specific embodiment of the invention shown in Figure 7 three, a kind of implementation method of mobile communication network multimedia enhancement service, the difference of itself and specific embodiment two is: can comprise also that after described step 7 described subscriber equipment stops using the operation of described multimedia enhancement service, specifically may further comprise the steps: in step 81, described subscriber equipment sends message to the mobile communication subnet of correspondence, be used for application and stop using this multimedia enhancement service, and provide professional application required relevant information; In step 82, if described user applies stops using the request of this multimedia enhancement service to secure permission, described mobile communication subnet sends the application cancellation to described subscriber equipment and uses receiveing the response of this multimedia enhancement service, is used to notify described subscriber equipment to stop using this multimedia enhancement service; Then in step 83, the gateway of described mobile communication subnet correspondence judges whether that other subscriber equipment is using described multimedia enhancement service in addition, is EO then, otherwise execution in step 84; In step 84, described gateway sends the cancel register request message to described multimedia server, is used for notifying this gateway not need to receive described multimedia enhancement service to described multimedia server; In step 85, described multimedia server sends the cancel register request to described gateway and receives the response; In step 86, described gateway sends to the multicast group of this multimedia enhancement service correspondence in the back of receiveing the response of receiving described multimedia server and leaves multicast group message then.When this specific embodiment provides subscriber equipment to leave multicast group further, the gateway of mobile communication subnet and the communication process between the multimedia server.
Fig. 8 is the flow chart of the specific embodiment of the invention four, a kind of implementation method of mobile communication network multimedia enhancement service, the difference of itself and specific embodiment two is: also can comprise the operation that stops to serve after this multimedia enhancement service finishes after described step 7, specifically may further comprise the steps: at first in step 801, described multimedia server sends the cancel register request message to described gateway, is used to notify this multimedia enhancement service of described gateway to finish; In step 802, described gateway sends the cancel register request to described multimedia server and receives the response, and sends to the multicast group of this multimedia enhancement service correspondence then and leaves multicast group message then; Then in step 803, described gateway stops message by the mobile communication subnet of correspondence to described subscriber equipment transmission multimedia service, is used to notify described subscriber equipment to stop this multimedia enhancement service.In 804 steps, described multimedia server selects whether to delete the multicast group of this multimedia enhancement service correspondence.This specific embodiment provides further when multimedia enhancement service finishes, the gateway of mobile communication subnet and the communication process between the multimedia 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) elaborates further.
MBMS provides the point-to-multipoint service of a data source to a plurality of users send data in the mobile network, be 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, by increasing some new functional entitys such as broadcast multicast service center (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, be called for short SGSN), Gateway GPRS Support Node (Gateway GPRS Support Node, be called for short GGSN), radio network controller (Radio Network Controller, be 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 workflow diagram of existing MBMS business, 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 orders the MBMS business.BM-SC normally initiates the service statement process with broadcast mode, notifies user MBMS the relevant information of business, as geographic range, multicast group address, professional time started etc.The user can be by adding the multicast group process, transmits to BM-SC and want the multicast group address that adds ordering corresponding M BMS business, 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 by 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 the user who orders this MBMS business, 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 started de-registration procedure when the tabulation of this multicast group correspondence of preserving when the downstream node be empty, perhaps startup de-registration procedure when BM-SC stops to transmit this MBMS and serves.
Figure 10 is the network frame schematic diagram of existing MBMS business.Wherein, GGSN is the gateway of mobile communication subnet and 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.Be used to UE to provide passage with communicating by letter of GGSN.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 to 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 RADIO ACCESSNETWORK, be called for short GERAN) or UMTS Terrestrial radio access network (UMTS Terrestrial RadioAccess 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 of the subnet of mobile communication described in the present embodiment is specially GGSN, and described 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; Described then BM-SC is according to predefined sparse mode IP multicast routing protocol, with described GGSN grafting in the multicast tree of described multicast group correspondence.Last described BM-SC is according to described predefined sparse mode IP multicast routing protocol, communicates by letter with described GGSN and transmits described MBMS business tine by described multicast tree.
Specify with regard to the method for carrying out the IP cast communication by shared multicast tree mode or active multicast tree mode between described BM-SC and the described GGSN respectively below:
(1) carry out the IP cast communication by sharing the multicast tree mode between described BM-SC and the described GGSN:
At first BM-SC sets up by following steps and shares multicast tree (referring to Figure 12): in step 01, BM-SC is the IP multicast address of described MBMS traffic assignments correspondence; Then in step 02, described BM-SC sends the multicast service assert message of the relevant parameter of the IP address that comprises described IP multicast address, described BM-SC and this MBMS business to the GGSN in its downstream; Then in step 03, described BM-SC sends message via first hop router of this BM-SC to predefined point router, is used to notify described point to set up described multicast tree; In step 04, the professional corresponding shared multicast tree of this MBMS is set up and safeguarded to described point router according to described predefined sparse mode IP multicast routing protocol subsequently.
GGSN can add this multicast group in the registration process or the session process of beginning of MBMS business 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 periodically sends PIM-Join message in the PIM agreement.Its step comprises (referring to Figure 13): in step 1a, need to receive the GGSN of MBMS business tine after described BM-SC registration and receiving the register requirement response of described BM-SC transmission, send adding multicast group message to described point router, be used to ask to add the professional corresponding multicast group of this MBMS; Subsequently in step 20, described point router is according to described sparse mode IP multicast routing protocol, with described GGSN grafting on described shared multicast tree.
After the BM-SC initiation session began message, GGSN also can add multicast group by 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, need to receive the GGSN of MBMS business tine after the session of receiving described BM-SC transmission begins request, send adding multicast group message to described point router, be used to ask to add the professional corresponding multicast group of this MBMS; Subsequently in step 20, described point router is according to described sparse mode IP multicast routing protocol, with described GGSN grafting on described shared multicast tree.Second kind of situation is: the session of initiating as BM-SC begins, simultaneously there is new user to want to receive this MBMS business datum again, because what BM-SC safeguarded 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, need to receive the GGSN of MBMS business tine after the session of this MBMS business that described BM-SC initiates begins, send login request message to described BM-SC, and after the register requirement of receiving described BM-SC transmission is receiveed the response, point router to described shared multicast tree sends adding multicast group message, is used to ask to add the professional corresponding multicast group of this MBMS; Then in step 2c, the point router of described shared multicast tree is according to described sparse mode IP multicast routing protocol, with described GGSN grafting on described shared multicast tree.
GGSN can leave described multicast group under following three kinds of situations then:
First kind is when the UE in DRNC downstream is sky, DRNC sends the cancel register request to SGSN, same, when the downstream node among the SGSN is that DRNC is when being sky, just send the cancel register request to GGSN, when the downstream node of GGSN is that SGSN is when being sky, though session this moment does not finish, but GGSN still sends the cancel register request message to BM-SC, receive the cancel register request message of BM-SC transmission at GGSN after, GGSN sends to RP and leaves multicast group message, for example sends PIM Prune message in the PIM agreement, leaves corresponding multicast group.Its step comprises (referring to Figure 16): in step a0, when described GGSN was empty in the downstream node tabulation of this multicast group correspondence of its preservation, described GGSN sent the cancel register request message to BM-SC; In step a1, after described GGSN received the cancel register request message that BM-SC sends, described GGSN sent to described point router and leaves multicast group message, is used for request and withdraws from this multicast group; In step a2, described point router is according to described sparse mode IP multicast routing protocol, with described GGSN beta pruning from described 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 and 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, described GGSN is after receiving the cancel register request that described BM-SC sends, GGSN sends the cancel register request to BM-SC and receives the response, and leaves multicast group message to described point router transmission, is used for request and withdraws from this multicast group; In step b1, described point router is according to described sparse mode IP multicast routing protocol, with described GGSN beta pruning from described 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, GGSN sends the conversation end request to BM-SC and 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 18): in step c0, described GGSN is after receiving the conversation end request that described BM-SC sends, GGSN sends the conversation end request to BM-SC and receives the response, and leaves multicast group message to described point router transmission, is used for request and withdraws from this multicast group; In step c1, described point router is according to described sparse mode IP multicast routing protocol, with described GGSN beta pruning from described 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 by active multicast tree mode between described BM-SC and the described GGSN:
At first BM-SC sets up active multicast tree (referring to Figure 19) by following steps: in step 001, described BM-SC is the IP multicast address of described MBMS traffic assignments correspondence; Then in step 002, described BM-SC sends the multicast service assert message of the relevant parameter of the IP address that comprises described IP multicast address, described BM-SC and this MBMS business to the GGSN in its downstream; In step 003, described BM-SC sets up and safeguards the professional corresponding active multicast tree of this MBMS according to described predefined sparse mode IP multicast routing protocol afterwards.
GGSN can add this multicast group under following three kinds of situations 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 has the demand to this multicast group information, 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, need to receive the GGSN of MBMS business tine after described BM-SC registration and receiving the register requirement response of described BM-SC transmission, send adding multicast group message to described BM-SC, be used to ask to add the professional corresponding multicast group of this MBMS; Then in described step 2A, described BM-SC is according to described predefined sparse mode IP multicast routing protocol, with described GGSN grafting on described 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, need to receive the GGSN of MBMS business tine after the session of receiving described 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, described BM-SC is according to described predefined sparse mode IP multicast routing protocol, with described GGSN grafting in described active multicast tree.
The third situation is: the session of initiating as BM-SC begins, simultaneously there is new user to want to add multicast group again, because what BM-SC safeguarded 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, need to receive the GGSN of MBMS business tine after the session of this MBMS business that described BM-SC initiates begins, send register requirement to described BM-SC, and after receiving the register requirement response that described 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, described BM-SC is according to described predefined sparse mode IP multicast routing protocol, with described GGSN grafting in described active multicast tree.
GGSN can leave described multicast group under following three kinds of situations then:
First kind of situation is when the UE in DRNC downstream is sky, DRNC sends the cancel register request to SGSN, same, when the downstream node among the SGSN is that DRNC is when being sky, just send the cancel register request to GGSN, when the downstream node of GGSN is that SGSN is when being sky, though session this moment does not finish, but GGSN still sends the cancel register request message to BM-SC, receive the cancel register request message of BM-SC transmission at GGSN after, and GGSN will send to multicast router and leave multicast group message, for example sends PIM Prune message in the PIM agreement, leaves corresponding multicast group.Its step comprises (referring to Figure 23): in steps A 0, when described GGSN was empty in the downstream node tabulation of this multicast group correspondence of its preservation, described GGSN sent the cancel register request message to BM-SC; In steps A 1, after described GGSN received the cancel register request message that BM-SC sends, described GGSN sent the cancel register request to described multicast router, is used to leave described multicast group; In steps A 2, described multicast router is according to described predefined sparse mode IP multicast routing protocol, with described GGSN beta pruning from described 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 and receives the response, and stops to send PIMJoin message simultaneously.Its step comprises (referring to Figure 24): in step B0, when described BM-SC stops in this MBMS business, send the cancel register request message to described GGSN; In step B1, after described GGSN received described cancel register request, GGSN sent the cancel register request to BM-SC and receives the response, and stops to send described 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, described BM-SC sends the cancel register request to described GGSN behind the conversation end of this MBMS business; In step C1, after described GGSN receives described cancel register request, stop to send described 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 elaborating of specific embodiment that technical solution of the present invention is used in the MBMS business, illustrate 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 schematic diagram 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, as 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 again to the data of every transmission paths.By as seen above-mentioned, 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 schematic diagram of the specific embodiment of the invention five.Adopt IP multicast mode to communicate between BM-SC and the GGSN, when distributing data, BM-SC only need send once for same data.As 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, strengthens the useful technique effect of extensibility.
Further, the specific embodiment of the invention five should be used as detailed description with regard to technical solution of the present invention in GSM network MBMS business, those of ordinary skill in the art is to be understood that, technical scheme of the present invention also can similarly be applied to the realization of the multimedia enhancement service in the cdma network, to reach effective saving bandwidth, improve network equipment utilance and media resource utilization rate, strengthen the useful technique effect of extensibility.
It should be noted last that: above embodiment is only in order to illustrating technical scheme of the present invention, but not the present invention is made restrictive sense.Although the present invention is had been described in detail 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 the spirit and scope that replacement does not break away from technical solution of the present invention.
Claims (10)
1. the implementation method of a mobile communication network multimedia enhancement service is characterized in that, comprising:
Step 1, subscriber equipment send message to the mobile communication subnet, are used for application and use multimedia enhancement service, and provide professional application required relevant information;
If this customer service application of step 2 secures permission, network is set up data transmission channel for the user, if this customer service application does not secure permission then finishes; Wherein the gateway of mobile communication subnet judges whether this gateway has added the multicast group of this multimedia enhancement service correspondence, is execution in step 6 then, otherwise execution in step 3;
Step 3, described gateway send login request message to multimedia server, are used to inquire whether this gateway can use this multimedia enhancement service;
Whether step 4, described multimedia server send register requirement to described gateway and receive the response, be used for notice and permit this gateway to use this multimedia enhancement service;
The registration message that step 5, described gateway receive described multimedia server is receiveed the response, and receive the response according to this registration message and to judge whether described multimedia server permits this gateway to use this multimedia enhancement service, be then to send to add multicast group message to the multicast group of this multimedia enhancement service correspondence, execution in step 6 then, otherwise execution in step 6;
Step 6, described gateway send application to described subscriber equipment and use receiveing the response of this multimedia enhancement service, are used to notify whether this multimedia enhancement service of licensed use of described subscriber equipment; And judge whether this multimedia enhancement service of licensed use of this subscriber equipment, be execution in step 7 then, otherwise finish;
Step 7, when business datum begins to transmit, described multimedia server transmits corresponding multimedia enhancement service content in IP multicast mode to described gateway, and described gateway receives this multimedia enhancement service content after send to described subscriber equipment by the mobile communication subnet.
2. method according to claim 1 is characterized in that, also comprises specifically comprising the operation of setting up described multicast group before described step 1:
Step 01, described multimedia server distribute corresponding IP multicast address and set up corresponding multicast group for this multimedia enhancement service;
Step 02, send the multimedia enhancement service assert message to the user, this message comprises the relevant information of described IP multicast address and this multimedia enhancement service.
3. method according to claim 1 is characterized in that, can comprise also that after described step 7 described subscriber equipment stops using the operation of described multimedia enhancement service, specifically may further comprise the steps:
Step 81, described subscriber equipment send message to the mobile communication subnet of correspondence, are used for application and stop using this multimedia enhancement service, and provide professional application required relevant information;
If the described user applies of step 82 stops using the request of this multimedia enhancement service to secure permission, described mobile communication subnet sends the application cancellation to described subscriber equipment and uses receiveing the response of this multimedia enhancement service, is used to notify described subscriber equipment to stop using this multimedia enhancement service;
The gateway of step 83, described mobile communication subnet correspondence judges whether that in addition other subscriber equipment is using described multimedia enhancement service, is EO then, otherwise execution in step 84;
Step 84, described gateway send the cancel register request message to described multimedia server, are used for notifying this gateway not need to receive described multimedia enhancement service to described multimedia server;
Step 85, described multimedia server send the cancel register request to described gateway and receive the response;
Step 86, described gateway send to the multicast group of this multimedia enhancement service correspondence in the back of receiveing the response of receiving described multimedia server and leave multicast group message.
4. method according to claim 1 is characterized in that, also can comprise the operation that stops to serve after this multimedia enhancement service finishes after described step 7, specifically may further comprise the steps:
Step 801, described multimedia server send the cancel register request message to described gateway, are used to notify this multimedia enhancement service of described gateway to finish;
Step 802, described gateway send the cancel register request to described multimedia server and receive the response, and send to the multicast group of this multimedia enhancement service correspondence then and leave multicast group message;
Step 803, described gateway stop message by the mobile communication subnet of correspondence to described subscriber equipment transmission multimedia service, are used to notify described subscriber equipment to stop this multimedia enhancement service;
Step 804, described multimedia server select whether to delete the multicast group of this multimedia enhancement service correspondence.
5. according to the arbitrary described method of claim 1-4, it is characterized in that: the gateway of the mobile communication subnet described in the step 2 is a Gateway GPRS Support Node.
6. method according to claim 5 is characterized in that: the multimedia server described in the step 3 is a broadcast multicast service center.
7. method according to claim 6, it is characterized in that: in described step 5, described gateway sends to the multicast group of this multimedia enhancement service correspondence by described broadcast multicast service center and adds multicast group message, described step 5 also comprises: after described broadcast multicast service center is received described adding multicast group message, according to predefined sparse mode IP multicast routing protocol, with described Gateway GPRS Support Node grafting in the multicast tree of described multicast group correspondence.
8. method according to claim 7, it is characterized in that: described step 7 specifically comprises: described broadcast multicast service center is according to described predefined sparse mode IP multicast routing protocol, communicate by letter with described Gateway GPRS Support Node and transmitting multimedia multimedia broadcast/multicast service content by described multicast tree, described gateway receives this multimedia multicast and broadcast service content after send to described subscriber equipment by the mobile communication subnet.
9. method according to claim 8 is characterized in that: also comprised specifically comprising the operation of setting up described multicast tree before step 1:
Step 01, described broadcast multicast service center are that described multimedia multicast and broadcasting service are distributed corresponding IP multicast address;
Step 02, described broadcast multicast service center send the multicast service assert message of the relevant parameter of the IP address that comprises described IP multicast address, described broadcast multicast service center and this multimedia multicast and broadcasting service to the Gateway GPRS Support Node in its downstream;
Step 03, described broadcast multicast service center send message via first hop router of this broadcast multicast service center to predefined point router, are used to notify described point to set up described multicast tree;
The shared multicast tree of this multimedia multicast and broadcasting service correspondence is set up and safeguarded to step 04, described point router according to described predefined sparse mode IP multicast routing protocol.
10. method according to claim 8 is characterized in that: also comprised specifically comprising the operation of setting up described multicast tree before step 1:
Step 001, described broadcast multicast service center are that described multimedia multicast and broadcasting service are distributed corresponding IP multicast address;
Step 002, described broadcast multicast service center send the multicast service assert message of the relevant parameter of the IP address that comprises described IP multicast address, described broadcast multicast service center and this multimedia multicast and broadcasting service to the Gateway GPRS Support Node in its downstream;
The active multicast tree of this multimedia multicast and broadcasting service correspondence is set up and safeguarded to step 003, described broadcast multicast service center according to described predefined sparse mode IP multicast routing protocol.
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| CN101304550B (en) * | 2007-05-08 | 2011-10-05 | 华为技术有限公司 | System and method for providing multimedia broadcast multicast service |
| CN101282510A (en) * | 2008-05-04 | 2008-10-08 | 华为软件技术有限公司 | Method and system for transmitting reinforced service message as well as equipment for reinforcing message service |
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