CN101242291A - A method and system for providing multicast service and multicast service parameter provision device - Google Patents
A method and system for providing multicast service and multicast service parameter provision device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/16—Arrangements for providing special services to substations
- H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
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Abstract
The invention discloses a multicast service method, comprising the steps: a service-supplying equipment provides functional entity SPSF to multicast service parameters to obtain multicast service parameters; a network side distributes network resource based on the multicast service parameters; a media resource functional entity MRF provides a multicast service to the user by the distributed network resource. The invention also discloses a system for providing multicast service, and an equipment for providing multicast service parameters. The multicast service can be actualized based on IMS system by the scheme of the invention.
Description
Technical field
The present invention relates to the multimedia multicast technical field, particularly a kind of method, equipment and system that multicast service is provided.
Background technology
In today of communication and information technology high development, along with the appearance of the IP technology of striding link layer and transmission medium, what internet (Internet) used popularizes rapidly.Meanwhile, people no longer are satisfied with single voice communication mode, and need brand-new multimedia communication mode.The fusion of the IPization of mobile communication network and fixed telecommunication network, Internet and communication network becomes the developing direction that industry is generally acknowledged undisputedly.For satisfying the common requirements of more and more outstanding IP multimedia application, third generation partner program (Three Generation Partnership Project, 3GPP) on the basis of packet carrying network, introduce IP Multimedia System (the IP Multimedia System of all-IP business network framework, IMS), target provides personalized user data, the shielding user mode access, the degree of opening of control professional ability provides multimedia communication experiences.
IMS is superimposed upon a subsystem on the existing packet domain in Wideband Code Division Multiple Access (WCDMA) (WCDMA) network 3GPP R5 stage, adopt the bearer path of packet domain for its upper strata control signaling and media delivery, introduce session initiation protocol (SIP) as professional control protocol, utilize simple, the easy expansion of SIP, media combination characteristics easily, by business control is separated with carrying control, provide abundant multimedia service.
The network architecture of IMS is (with reference to 3GPP TS 23.228) as shown in Figure 1, main functional entity comprises call conversation control function entity (Call Session Control Function, CSCF), specifically comprise proxy CSCF (Proxy CSCF, P-CSCF) 102, inquiry/serving CSCF (I/S-CSCF) 103, the application server (AS) 115 of miscellaneous service logic control function is provided, the home subscriber server (HSS) and being used to of centralized management user contracting data is realized media gateway controlling entity (Medium Gateway Control Function, MGCF) the 106/ interactive multimedia gateway (T-MGW) 107 with the circuit switching net interconnecting.Subscriber equipment (UE) 101 is by current on-site P-CSCF 102 access IMS, and session and professional triggering control reach with the business control of AS and then finished by the S-CSCF of its registered place alternately.
P-CSCF102 and I/S-CSCF 103 can be referred to as CSCF, are used for providing correlation functions such as IMS network user agent, session control, route, professional triggering and different IMS inter-domain intercommunicate; MGCF 106/T-MGF 107/SGF 109 is MGCF, medium gateway function and signaling gateway function, is used to realize the intercommunication between the IMS network user and traditional public switched telephone network (PSTN) network user; Borde gateway controlled function entity (BGCF) 108 is used for addressing between the MGCF and route between the different IMS territory; The user location function entity (Subscriber Location Function, SLF) 114 are used for a plurality of user property service function entities (User Profile Server Function, the UPSF) selection between 116; Interconnected boundary Control function (Interconnect Border ControlFunction, IBCF) 111 and interconnected Border Gateway Function (Interconnect Border GatewayFunction, IBGF) 110 is the functional entity of IMS inter-domain intercommunicate; Media resource function controller (Media Resource Function Controller, MRFC) 104 and Media Resource Function Processor (Media Resource Function Processor, MRFP) 105 media resource function entity (MRF) be can be referred to as, distribution, control and processing thereof are used for media resource; Network Attachment Subsystem (NetworkAttachment Sub-system, NASS) 101 access authentications that are used for the user, address assignment etc.; (Resource and Admission Control Subsystem, RACS) 117 demands that are used for according to operation layer such as IMS are finished the control to bearer network to resource access control system.Wherein, P-CSCF 102 and I/S-CSCF 103 are referred to as IMS core (core IMS).
Streaming media service or IPTV business are a kind of new business that developed rapidly in recent years.Streaming media service transmits the multimedia file that comprises video, audio frequency on packet switching network, the network equipment that is used to store these multimedia files is called the Streaming Media source.The user need not to download fully these multimedia files just can play many multicast service medias content immediately.The key technology that Streaming Media is realized is transmitted technology exactly as a stream, and the stream transmission technology is continuous video and audio-frequency information to be become Media Stream after treatment be stored in the Streaming Media source, subscriber equipment is play described Media Stream while downloading, and whole file such as does not need to download to the network transmission technology that just can watch behind the local device.
If there are a plurality of customer requirements to receive identical business tine simultaneously, can adopt multicasting technology to make professional transmit leg is that the Streaming Media source sends a Media Stream to the designated multicast address.In order to obtain multicast content, professional recipient is that subscriber equipment is by adding professional multicast group, as internet usage cohort messaging protocol (Internet Group Message Protocol, IGMP) require the router of adjacency to send business tine to oneself, then alternately to set up multicast forwarding path, the multicast service content just can pass to content recipient along multicast forwarding path from multicast source like this by multicast routing protocol (as Protocol Independent Multicast-sparse mode (PIM-SM) agreement etc.) between the router.Use multicasting technology transport service stream, no matter how many recipients has, and professional transmit leg only need send a data flow.Multicast packet only produces single data flow the transmission point of putting from the business transmission on recipient's the transfer path, obviously use multicasting technology can alleviate the load of professional transmit leg, and can effectively utilize Internet resources.
The representative instance of multicast service is live telecast (LTV) business.For the whole users that watch same program, all be identical at each programme content of constantly being received, therefore can adopt the bearing bed multicast mode to reduce network bandwidth requirements.Certainly, can adopt the multicast mode to carry out for the situation that same business tine need be sent to simultaneously a plurality of users, can regard multicast service as, as for Multi-Party Conference, send to a plurality of users in the multicast mode again after spokesman's audio/video information can being sent to Conference server, this can be regarded as the application of multicast service equally.
Can provide voice service based on the IMS system at present, but for providing multicast class business also not have solution preferably.
Summary of the invention
In view of this, the objective of the invention is to, propose a kind of method that multicast service is provided, can realize multicast service based on the IMS system.This method comprises the steps:
Business provides equipment to provide functional entity SPSF to obtain the multicast service parameter to the multicast service parameter;
Network side is according to described multicast service parameter allocation of network resources;
Pass through the Internet resources that distributed, the media resource function entity MRF provide multicast service to subscriber equipment.
The present invention also proposes a kind of system that multicast service is provided, and the multicast service parameter provides equipment.
Described system comprises that IMS network and business provide equipment, also comprise:
SPSF is used to store multicast service identifier and multicast service parameter associated therewith;
Described business provides equipment to be used for obtaining corresponding multicast service parameter according to multicast service identifier to SPSF, and the multicast service parameter of being obtained is sent to the IMS network;
Described IMS network is used for according to described multicast service parameter allocation of network resources, and is handed down to subscriber equipment by the Internet resources that wherein MRF passes through the multicast service content to be distributed.
Described multicast service parameter provides equipment to comprise:
Receive request module, be used to receive the request that requires to provide the multicast service parameter, comprise service identification in this request; And described service identification is sent to multicast service parameter matching module;
The multicast service parameter memory module is used to store the multicast service parameter;
Multicast service parameter matching module is used for matching corresponding multicast service parameter in the multicast service parameter memory module, and the multicast service parameter that is matched being sent to sending module according to from the service identification that receives request module;
Sending module, the multicast service parameter from multicast service parameter matching module that is used for being received are sent to the network entity of submitting the multicast service parameter request to.
As can be seen from the above technical solutions, the embodiment of the invention provides the multicast service parameter by SPSF, is sent to subscriber equipment according to described multicast service parameter allocation of network resources and with multicast service.Based on the embodiment of the invention, those skilled in the art can need not to pay creative work, obtain the implementation of various multicast mechanism business based on IMS, thus horn of plenty based on the multicast class business of IMS system, the IPTV class business of focus is carried out especially at present provides good basis.
Description of drawings
Fig. 1 is an existing IMS system configuration schematic diagram;
Fig. 2 provides the system schematic of multicast service for the embodiment of the invention;
Fig. 3 is the service request signaling process figure of the basic chain of command of embodiment of the invention scheme;
Fig. 4 is the service request signaling process figure of the chain of command of first embodiment of the invention;
Fig. 5 is the multicast flow chart of first embodiment of the invention data surface;
Fig. 6 is the service request signaling process figure of the chain of command of second embodiment of the invention;
Fig. 7 is the service request signaling process figure of the chain of command of fourth embodiment of the invention;
Fig. 8 provides the internal module schematic diagram of functional entity for the multicast service parameter of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with accompanying drawing.
The multicast service system that the embodiment of the invention provides based on IMS, its network configuration as shown in Figure 2, wherein functional entity or assembly such as UE 201, RACS 202, MRF 204, UPSF 205, AS 206 and interface ISC, Gm, Gq/Gq ', Mr, Sh, Cx etc. are in existing telecommunications and internet fused business and agreement (Telecommunication and Internet converged Services andProtocols for Advanced Networking, TISPAN) existing definition in the series standard; Certainly, TISPAN defined IMS system and the defined IMS of 3GPP system come down in a continuous line, and its details difference does not influence the concrete application of this patent.
AS 206 is used to provide the logic control function of business, and for control plane, AS 206 provides professional entity to UE 201, and can be called as business provides equipment.
MRF 204 is as the entity that multicast service media stream is provided on the data surface, and its media business content can be come the media server in the automatic network.
Embodiment of the invention system comprises that also the multicast service parameter provides functional entity (ServiceParameter Supply Function, SPSF) 207.This entity is used to preserve and externally provides multicast service to carry out required multicast service parameter (Service Parameters), comprise the employed media delivery parameter of multicast service, comprise multicast address, multicast port and/or multicast source address/port, also comprise coding/decoding information.Described multicast source address/port just provides the address of the media server of multicast service media resource content.Wherein I1 is the interface between AS 206 and the SPSF 207; AS 206 can comprise multicast address by the transport layer information of this interface from SPSF 207 request multicast services, and perhaps multicast address and port may also comprise multicast source address, perhaps multicast source address and port etc.
It is wherein a kind of connected mode that SPSF shown in Fig. 2 207 is connected with AS 206, and in fact SPSF 207 also can be arranged between S-CSCF 203 and the MRF 204, perhaps is arranged between AS 206 and the MRF 204; SPSF 207 can and S-CSCF 203 and MRF 204 between have interface respectively, also can and AS 206 and MRF 204 between have interface respectively.
Below the multicast class operation flow of the embodiment of the invention is divided into two logical gates, the service request signaling procedure of chain of command and the multicast procedures of data surface, and respectively these two logical gates are described in detail.
When the service request signaling procedure is user's requested service, for obtain multicast service media flow transmission parameter need with required carry out mutual of service server.
For different access network technologies, its multicast treatment mechanism that inserts part is different, therefore after obtaining the multicast service transmission parameter, the user also needs to carry out data surface reciprocal process specific to access technology, multiple access technology is not carried out exhaustive explanation in the present invention, only the Access Network framework of being contained with TISAPN RACS is that example is illustrated.Adopt other access technology not influence application of the present invention.
The basic controlling plane traffic demand signalling flow process of the embodiment of the invention comprises the steps: as shown in Figure 3
Step 301 sends to P-CSCF to step 302:UE and comprises initiating a session request of service identification, and this initiates a session request through the route of I/S-CSCF, is forwarded to AS.
After step 303:AS receives and initiates a session request, send the multicast service parameter request to SPSF, described multicast service parameter specifically comprises professional multicast address and/or port, and/or media delivery parameter and coding/decoding informations such as multicast source address and/or port.
Step 304:SPSF returns the multicast service parameter to AS.
After step 305:AS receives the multicast service parameter, send conversational response message, carry described multicast service parameter in this conversational response message to P/I/S-CSCF.
Step 306:P/I/S-CSCF determines the Internet resources that this multicast service is required according to carrying out the resource reservation process between multicast service parameter in the described conversational response message and the RACS.
Step 307:P/I/S-CSCF is sent to UE with the session response message.
Step 308:UE and AS carry out media consultation process by RACS and P/I/S-CSCF, determine the common code encoding/decoding mode of supporting of both sides.
Step 309:UE sends the affirmation message of initiation session to P/I/S-CSCF.
Step 310:P/I/S-CSCF and AS carry out the resource distribution process, distribute and the corresponding Internet resources of this multicast service.
Step 311:P/I/S-CSCF sends the affirmation message of initiation session to AS.
In the above-mentioned flow process, the resource distribution process of the resource reservation process of step 306, the media consultation process of step 308 and step 310 can be with reference to the relevant regulations of existing standard agreement.
Below by specific embodiment the present invention program is further set forth.
The service request signaling procedure of the control plane of first embodiment of the invention comprises the steps: as shown in Figure 4
Step 401:UE selects program by electronic program guides (EPG) guiding, initiates the SIP service request to P/I/S-CSCF.Multicast service identifier is carried in this SIP request.Multicast service identifier is used for the programme content that identifying user is asked; For different business, multicast service identifier may be different.Concrete process of transmitting is that UE sends to local P-CSCF with this SIP service request, by the routing mechanism of prior art, selects corresponding I-CSCF and S-CSCF, and P-CSCF sends to selected I-CSCF and S-CSCF with the SIP service request again.
In addition, do not provide the user here and how to obtain EPG, can solve with prior art, for example the user (Hypertext Transfer Protocol HTTP) obtains EPG to the network entity that electronic program list is provided by the hypertext transfer agreement.
Step 402:S-CSCF triggers corresponding AS and handles according to the service request of being received.A kind of possible triggering mode is as follows: S-CSCF is after receiving the SIP request, download initial filter standard or norm (Initial Filter Criteria from UPSF, iFC), the service identification that carries in the described SIP request, field etc. are mated with iFC, select corresponding AS according to matching result, and send service request to selected AS.As the service identification in the SIP request is " LTV ", defines the corresponding live telecast server of service identification " LTV " among the iFC, and then the given live television service server of trigger request is handled.In fact also can adopt other triggering mode.
Step 403 is asked user service data to 404:AS to UPSF, and described user service data comprises the tabulation of user channel rights of using, subscribes to the time limit etc.AS determines the operable multicast service of described subscriber equipment according to the user service data from UPSF, if do not find the operable multicast service of described subscriber equipment, then refuses described multicast service request, and finishes flow process of the present invention; If find corresponding multicast service then to continue execution in step 405.
Multicast service identifier in the step 405:AS analysis user service request, determine the multicast service parameter corresponding with this multicast service identifier, and send the information of request multicast service parameter to SPSF, described multicast service parameter specifically comprises professional multicast address (and port), may also comprise multicast source address media delivery parameter and coding/decoding informations such as (and ports).In the media delivery parameter, multicast address is necessary; The multicast destination interface must depend on multicast address; Source port must depend on source address and occur, and does not perhaps occur; May be combined as:
Multicast address;
Multicast address and (purpose) port;
Multicast address and (purpose) port and source address;
Multicast address and source address;
Multicast address and source address and source port;
Multicast address and port, source address, and source port.
In sending terminal information to, have multicast address and multicast port at least;
But be used for only can using multicast address and/or multicast port when IGMP adds the request of multicast group;
If expansion IGMP or similar agreement then can all use, but multicast address are necessary.
Step 406:SPSF returns the multicast service parameter to AS.Described multicast service parameter comprises media delivery parameter and coding/decoding information.AS carries out necessary renewal according to described media delivery parameter and/or to the user service data user conversation, as upgrading the channel of the current use of user.
Step 407:AS is attached to the media delivery parameter information in the response message, and this response message carries out routing forwarding to P-CSCF by the IMS core.
Step 408:P-CSCF carries out the resource control request according to media delivery parameter entrained in the described response message to RACS.Described resource control request is used to indicate transport layer to carry out resource allocation and uses the designated multicast grant column list, as forbids or allow designated user to receive specific multicast flowing.
The media delivery parameter maps that comprises in the resource control request of step 409:RACS with application layer is a transport layer parameters, and the multicast grant column list is sent to Access Layer gate entity.In the present embodiment, described Access Layer gate entity is RCEF, carries out multicast mandate and resource control by it, sets up multicast channel.According to the difference of real network, Access Layer gate entity also can be other node.Described multicast grant column list comprises the information of forbidding or allowing designated user reception specific multicast service Media Stream.
Step 410:P-CSCF is transmitted to UE with the response that step 408 provides.
Step 411:UE adds their confirmation to above-mentioned response, and this affirmation is transmitted by P-CSCF and finally is dealt into AS.
So far, the user has obtained can be used for the parameter information that aware transport layer multicast is set up.
In the above-mentioned flow process, step 408 and step 409 are used for the resource control procedure that illustrates that flow process is possible; This step may occur in P-CSCF in the IMS core when receiving service response, also can occur in P-CSCF in the IMS core and receive professionally when confirming, specifically depends on the resource control strategy of network opportunity.In addition, the resource control procedure also can be divided into resource reservation and resource use, takes place under certain condition respectively; The media consultation process that provides in this example has only been passed through once and has been consulted, and UE and AS may need media consultation process repeatedly in reality is mutual.Below as do not add explanation, the concrete implementation detail of resource control procedure all can be carried out with reference to existing RACS technical standard.
The data surface multicast procedures of the embodiment of the invention comprises the steps: as shown in Figure 5
Step 501:UE sends the request that adds the designated multicast group to Access Layer gate node, send to the multicast service content of designated multicast address with reception, if this asks to be IGMP request, only can use multicast address when then adding the request of multicast group, perhaps multicast address and multicast port; If use expansion IGMP or similar agreement, then may also comprise multicast source address/port, but multicast address remain necessary.
Here may comprise further also that RCEF joins request to multicast according to the aforementioned multicast grant column list that issues authorizes, if authorize by continue to carry out follow-up flow process, otherwise request and the process ends of refusal UE.
Step 502: this request is after RCEF handles, and RCEF is established to the multicast transfer path of MRF by other transmission layer entity such as BGF, and this process can use multicast routing protocol (as PIM-SM or PIM-DM) etc. to carry out.After this multicast service media stream flows to RCEF by MRF, and sends to UE by RCEF.
Step 503: the user need finish this multicast service, and UE sends the request SIP BYE message of end multicast service to finish this session to P-CSCF.Carry multicast address/port information in the described SIP BYE message.
Step 504:P-CSCF is according to multicast address/port information entrained in the described request, send the resource control request to RACS, comprising the indication that transport layer is carried out resource control and revised or delete the designated multicast grant column list, flow rights of using with the transport layer service media of deleting described UE.Resource control described here may just be carried out the record or the renewal of number of users for multicast service media stream, discharges and needn't carry out actual resource when certain user leaves, because may also exist other user watching same program.
Step 505:RACS is mapped as transport layer parameters with application layer instruction/request, and the multicast grant column list is sent to Access Layer gate entity such as RCEF, carries out multicast mandate and resource control etc. by RCEF.
Step 506:P-CSCF will give AS from the request route of the end multicast service of UE.
Step 507:AS sends the conversation end acknowledge message to UE, confirms conversation end.
Step 508:UE sends multicast group to gate entity RCEF and leaves request, as IGMP leave message; To finish data surface service ending process.This message also can just send when the user initiates SIP BYE end session simultaneously, does not influence the Business Processing process.
In above-mentioned flow process, if multicast address is only carried in the IGMP of step 501 request, then transport layer can be carried out professional route according to multicast address; If carry multicast address and source address, then transport layer can be carried out the medium route with multicast address and source address; In addition, carry multicast address and/or multicast source address and/or multicast destination interface and/or the isoparametric combination of port thereby also can adopt to be expanded with the similar New Deal of IGMP or to the IGMP agreement in the multicast group request, transport layer then further can be carried out route to Media Stream according to the combination of described parameter.That is to say, MRF can be with multicast (purpose) address, and perhaps multicast address and port may also comprise multicast source address, perhaps the isoparametric combination of multicast source address and port comes the multicast Media Stream is distinguished, thereby can use a multicast address that a plurality of multicast Media Streams are provided.
The service request signaling procedure of the control plane of second embodiment of the invention as shown in Figure 6, this flow process is compared with flow process shown in Figure 3, after the former step 407, further comprises the steps:
Step 407a:AS sends the media resource request carry the professional multicast address that obtains in the step 407 and/or port, coding/decoding information to MRF;
Step 407b:MRF returns corresponding media delivery parameter to AS.Described media delivery parameter comprises professional multicast address or multicast address and destination interface, multicast source address or multicast source address and source port, and coding/decoding information etc.This media delivery parameter may be identical with the media delivery parameter in the media resource request that AS sends, also may be different, and different reasons occurring may be that change or renewal etc. have taken place multicast source; If multicast service is distinguished in the combination of extra use source address or use source address and source port on the basis of described parameter, then MRF can provide multicast source address and source port information in this step.
The reason of adding above step is: confirm that MRF is in normal operating state, perhaps notifying MRF to carry out provides the preparation of multicast service; Perhaps ask MRF that additional parameter is provided.
Other step of present embodiment and data surface multicast procedures are with first embodiment, so repeat no more.
The service request signaling procedure of the control plane of third embodiment of the invention is compared with flow process shown in Figure 4 as shown in Figure 7, only is that step 306 and 307 replaces with following steps:
Step 406a ': AS sends the multicast service parameter request to MRF, and this request at first sends to the S-CSCF of IMS nuclear;
Step 406b ': S-CFCF is to the request of SPSF forwarding multicasting service parameter;
Step 407a ': SPSF processing multicast service parameter request, return the multicast service parameter response to S-CSCF; In this response, carry the media delivery parameter and give S-CSCF, specifically comprise professional multicast address and port and/or multicast source address and/or source port, coding/decoding information etc.Here SPSF also may be to the request of the further routing multicast service parameter of MRF, thereby provides above-mentioned media delivery parameter by MRF.
Step 407b ': S-CSCF is transmitted to AS with described multicast service parameter response.
Among this embodiment, the multicast service parameter request that AS sends is not directly to send to SPSF, but arrives SPSF through the routing forwarding of S-CSCF.
The schematic diagram of the internal module of the SPSF of the embodiment of the invention comprises as shown in Figure 8 as lower module:
Receive request module 801, be used to receive the request that requires to provide the multicast service parameter, comprise service identification in this request; And described service identification is sent to multicast service parameter matching module 803.In the present embodiment, described multicast service parameter request comes from AS.
Multicast service parameter memory module 802 is used for medium transmission parameter and coding/decoding information, and described media delivery parameter comprises multicast service address and/or port, and/or multicast source address and/or port.
Multicast service parameter matching module 803, be used for according to service identification from reception request module 801, in multicast service parameter memory module 802, match corresponding media delivery parameter and coding/decoding information, and media delivery parameter and the coding/decoding information that is matched is sent to sending module 804.
Sending module 804, the media delivery parameter and the coding/decoding information that are used for being received are sent to the network entity of submitting the multicast service parameter request to, and in embodiments of the present invention, this network entity is AS.
In addition, SPSF can also comprise a multicast service parameter acquisition module 805, is used to obtain described multicast service parameter, and the multicast service parameter of being obtained is sent to the multicast service parameter memory module.
Used SPSF in the embodiment of the invention, the effect of being played in implementing procedure of the present invention provides the multicast service parameter to AS exactly.On the specific implementation, can be by service discovering and selection functional entity (Services Discover and Select Function, the SD﹠amp in the relevant patent; SF), media resource positioning function entity (Multimedia Resources Locate Function, MRLF), (Service Schedule Function SSF) serves as SPSF among the present invention program for media resource agent functionality entity (MRBF) or service deployment functional entity.
Stipulate that SSF is used to finish deployment and the tissue to multicast service in another part patent application document of submitting on January 11st, 2007 according to the inventor.If serve as SPSF by SSF, then described multicast service parameter acquisition module 805 comprises:
The multicast address management unit is used to carry out the distribution and the management of multicast address/port, for example, distributes and manage the address of a plurality of MRF, and the source address and/or the port of the media server of media content perhaps is provided to MRF.
Address and relevance unit are used to set up the corresponding relation between multicast address/port of being managed in multicast service content identification, multicast source address and/or port and multicast address management unit.
Service discovering and selection functional entity (SD﹠amp; SF) in the IPTV standard that at present the TISPAN normal structure is being formulated, orientate as and can be used to provide service discovering information, for providing, the user uses professional guidance information; Certainly this entity also can provide multi-operator inlet information, thereby provides the guidance information of selecting multi-operator for the user; The user can be based on the selected business of using particular operator of this guidance information.In the present invention, this entity also can possess such function, promptly can preserve the multicast service transmission layer information that multicast service is carried out required use, comprise multicast address, perhaps multicast address and port may also comprise multicast source address, perhaps multicast source address and port etc.
If by SD﹠amp; SF serves as SPSF, and then described multicast service parameter acquisition module 805 comprises:
Operator's interface unit, operator is by this unit, and business information such as the multicast address/port of the multicast service that it provided and/or multicast source address/port are injected multicast service parameter memory module 802.
Application number is MRLF and/or the MRBF that has proposed to be used to carry out media resource scheduling in the patent application document of 200610033774.X.If serve as SPSF by MRLF or MRBF, then described multicast service parameter acquisition module 805 comprises:
Determine the multicast service unit, be used to be defined as multicast address or the media server that UE provides multicast service;
The multicast service parameter extraction unit, be used for determine the relevant information of the determined multicast address in multicast service unit or the multicast source address of media server/or port information extract, and be sent to multicast service parameter memory module 802.
If serve as SPSF, then can realize the service request signaling procedure of control plane as shown in Figure 3 by MRLF; If serve as SPSF, then can realize the service request signaling procedure of control plane as shown in Figure 7 by MRBF.The detailed introduction of MRLF or MRBF or correlation function are realized consulting above-mentioned application documents.
Below only be that the specific implementation of multicast service parameter acquisition module has been lifted several common example, the present invention does not limit the obtain manner of multicast service parameter.
The embodiment of the invention has provided a multi-cast system based on IMS, provides the multicast service realization flow based on this system, and provides the entity that is used to provide the multicast service parameter in this system.Based on the embodiment of the invention, those skilled in the art can need not to pay creative work, obtain the implementation of various multicast mechanism business based on IMS, thus horn of plenty based on the multicast class business of IMS system, the IPTV class business of focus is carried out especially at present provides good basis.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (28)
1. the method that multicast service is provided is characterized in that, this method comprises the steps:
Business provides equipment to provide functional entity SPSF to obtain the multicast service parameter to the multicast service parameter;
The network based described multicast service parameter allocation of network resources of IMS;
Pass through the Internet resources that distributed, the media resource function entity MRF provide multicast service to subscriber equipment.
2. method according to claim 1 is characterized in that, described business provides equipment to obtain before the multicast parameters, further comprises:
Subscriber equipment sends the service request that comprises service identification to proxy call conversation control function entity P-CSCF, P-CSCF selects corresponding query call conversation control function entity I-CSCF and service call session functions entity S-CSCF, and described service request is sent to selected S-CSCF;
Described S-CSCF is according to the service request of being received, triggering corresponding business provides equipment to handle.
3. method according to claim 2 is characterized in that, described subscriber equipment further comprised before P-CSCF sends service request: subscriber equipment obtains electronic program guides guiding program.
4. method according to claim 1 is characterized in that, described business provides equipment to provide functional entity to obtain the multicast service parameter to the multicast service parameter to comprise:
Business provides the multicast service identifier in the request of device analysis customer service, determines the multicast service parameter corresponding with this multicast service identifier, and sends the information of request multicast service parameter to SPSF;
SPSF provides equipment to return the multicast service parameter to business.
5. method according to claim 4 is characterized in that, described multicast service parameter comprises media delivery parameter and coding/decoding information.
6. method according to claim 5 is characterized in that, described media delivery parameter comprises: the multicast service address.
7. method according to claim 6 is characterized in that, described media delivery parameter also further comprises the multicast service port.
8. method according to claim 6 is characterized in that, described media delivery parameter also further comprises multicast source address.
9. method according to claim 8 is characterized in that, described media delivery parameter also further comprises multicast source port.
10. method according to claim 6 is characterized in that, described SPSF provides after equipment returns the multicast service parameter to business, further comprises:
Business provides equipment to send the media resource request of carrying the multicast service parameter that is obtained to MRF;
MRF provides equipment to return medium source address to business, perhaps medium source address and port.
11. method according to claim 1 is characterized in that, described business provides equipment to provide functional entity to obtain the multicast service parameter to the multicast service parameter to comprise:
Business provides equipment to send the multicast service parameter request to P/I/S-CSCF, and S-CSCF is transmitted to SPSF with described multicast service parameter request;
SPSF handles described multicast service parameter request, returns the multicast service parameter response to S-CSCF, and S-CSCF provides equipment with the described multicast service parameter response business of being transmitted to.
12., it is characterized in that described network side comprises according to described multicast service parameter allocation of network resources according to each described method of claim 1 to 11:
The response message that application server will comprise the multicast service parameter information carries out routing forwarding to P-CSCF by IP Multimedia System IMS core;
P-CSCF carries out the resource control request according to the multicast service parameter in the described response message to resource and permission control subsystem RACS;
RACS is mapped as application layer instruction/request transport layer parameters and according to user's positioning result the multicast grant column list is sent to Access Layer gate entity;
Access Layer gate entity is established to the multicast transfer path of MRF.
13. method according to claim 12 is characterized in that, described Access Layer gate entity is established to before the multicast transfer path of MRF, further comprises:
UE sends the request that adds the designated multicast group to Access Layer gate node.
14. method according to claim 13, it is characterized in that, described UE is after Access Layer gate node sends the request that adds the designated multicast group, further comprise: Access Layer gate entity joins request to the multicast of being received according to the multicast grant column list and authorizes, if authorize by carry out described subsequent step.
15., it is characterized in that described network side comprises according to described multicast service parameter allocation of network resources according to each described method of claim 1 to 11:
After business provides equipment to receive the multicast service parameter, send the conversational response message of carrying described multicast service parameter to P/I/S-CSCF;
P/I/S-CSCF determines the Internet resources that this multicast service is required according to carrying out the resource reservation process between multicast service parameter in the described conversational response message and the RACS;
P/I/S-CSCF is sent to subscriber equipment with the session response message, and subscriber equipment and business provide equipment to carry out media consultation process by RACS and P/I/S-CSCF, determines the common code encoding/decoding mode of supporting of both sides;
P/I/S-CSCF and business provide equipment to carry out the resource distribution process, distribute and the corresponding Internet resources of this multicast service.
16. the system that multicast service is provided comprises that IMS network and business provide equipment, it is characterized in that this system also comprises:
SPSF is used to store multicast service identifier and multicast service parameter associated therewith;
Described business provides equipment to be used for obtaining corresponding multicast service parameter according to multicast service identifier to SPSF, and the multicast service parameter of being obtained is sent to the IMS network;
Described IMS network is used for according to described multicast service parameter allocation of network resources, and is handed down to subscriber equipment by the Internet resources that wherein MRF passes through the multicast service content to be distributed.
17. system according to claim 16 is characterized in that, described IMS network comprises P-CSCF, I-CSCF and S-CSCF;
Described P-CSCF is used to receive the service request that comprises service identification from subscriber equipment, selects corresponding I-CSCF and S-CSCF, and P-CSCF sends to selected I-CSCF and S-CSCF with described service request again;
Described S-CSCF is used for according to the service request of being received, selects corresponding business that equipment is provided, and described service request is sent to selected business equipment is provided.
18. system according to claim 17 is characterized in that, this system further comprises UPSF, is used to store iFC, and according to the request of S-CSCF, provides corresponding iFC to S-CSCF;
Then described S-CSCF selection business provides equipment to be: S-CSCF mates service request and described iFC, selects corresponding service that equipment is provided according to matching result.
19., it is characterized in that described SPSF is service discovering and selection functional entity SD﹠amp according to claim 16,17 or 18 described systems; SF, media resource positioning function entity MRLF, media resource agent functionality entity MRBF or service deployment functional entity SSF.
20. a multicast service parameter provides equipment, it is characterized in that, this equipment comprises:
Receive request module, be used to receive the request that requires to provide the multicast service parameter, comprise service identification in this request; And described service identification is sent to multicast service parameter matching module;
The multicast service parameter memory module is used to store the multicast service parameter;
Multicast service parameter matching module is used for matching corresponding multicast service parameter in the multicast service parameter memory module, and the multicast service parameter that is matched being sent to sending module according to from the service identification that receives request module;
Sending module, the multicast service parameter from multicast service parameter matching module that is used for being received are sent to the network entity of submitting the multicast service parameter request to.
21. multicast service parameter according to claim 20 provides equipment, it is characterized in that, this equipment further comprises the multicast service parameter acquisition module, is used to obtain the multicast service parameter, and the multicast service parameter of being obtained is sent to the multicast service parameter memory module.
22. multicast service parameter according to claim 21 provides equipment, it is characterized in that, described multicast service parameter comprises media delivery parameter and coding/decoding information;
Described media delivery parameter comprises: multicast service address and/or port, and/or multicast source address and/or port.
23. multicast service parameter according to claim 22 provides equipment, it is characterized in that, described multicast service parameter acquisition module comprises:
The multicast address management unit is used to carry out the distribution and the management of multicast address/port;
Address and relevance unit are used to set up the corresponding relation between multicast address/port of being managed in multicast service content identification, multicast source address and/or port and multicast address management unit.
24. multicast service parameter according to claim 23 provides equipment, it is characterized in that, it is service deployment functional entity SSF that described multicast service parameter provides equipment.
25. multicast service parameter according to claim 22 provides equipment, it is characterized in that, described multicast service parameter acquisition module comprises:
Operator's interface unit, operator is by this unit, and business information such as the multicast address/port of the multicast service that it provided and/or multicast source address/port are injected the multicast service parameter memory module.
26. multicast service parameter according to claim 25 provides equipment, it is characterized in that, it is service discovering and selection functional entity SD﹠amp that described multicast service parameter provides equipment; SF.
27. multicast service parameter according to claim 22 provides equipment, it is characterized in that, described multicast service parameter acquisition module comprises:
Determine the multicast service unit, be used to be defined as multicast address or the media server that UE provides multicast service;
The multicast service parameter extraction unit, be used for determine the relevant information of the determined multicast address in multicast service unit or the multicast source address of media server/or port information extract, and be sent to the multicast service parameter memory module.
28. multicast service parameter according to claim 27 provides equipment, it is characterized in that, it is media resource positioning function entity MRLF or media resource agent functionality entity MRBF that described multicast service parameter provides equipment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200710080103.3A CN101242291A (en) | 2007-02-09 | 2007-02-09 | A method and system for providing multicast service and multicast service parameter provision device |
| PCT/CN2008/070263 WO2008098504A1 (en) | 2007-02-09 | 2008-02-03 | Method and system for providing multicast service and device for providing multicast service parameter |
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| CN200710080103.3A CN101242291A (en) | 2007-02-09 | 2007-02-09 | A method and system for providing multicast service and multicast service parameter provision device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741915B (en) * | 2008-11-17 | 2013-04-24 | 华为技术有限公司 | Content interaction method, equipment and system for peer-to-peer protocols |
| WO2018177173A1 (en) * | 2017-03-31 | 2018-10-04 | 华为技术有限公司 | Method for realizing multicast and relevant network device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102457492B (en) * | 2010-10-20 | 2014-10-08 | 中国移动通信有限公司 | Coordinated transmission method for streaming media file, system and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1735272A (en) * | 2004-07-29 | 2006-02-15 | 北京三星通信技术研究有限公司 | The method of notice is provided for multimedia broadcast-multicast service |
| CN100488163C (en) * | 2005-01-19 | 2009-05-13 | 华为技术有限公司 | Multicast service processing method and system |
| US20060262793A1 (en) * | 2005-05-19 | 2006-11-23 | Nokia Corporation | Method and system for handover between service delivery platforms by following content |
-
2007
- 2007-02-09 CN CN200710080103.3A patent/CN101242291A/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741915B (en) * | 2008-11-17 | 2013-04-24 | 华为技术有限公司 | Content interaction method, equipment and system for peer-to-peer protocols |
| WO2018177173A1 (en) * | 2017-03-31 | 2018-10-04 | 华为技术有限公司 | Method for realizing multicast and relevant network device |
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