CN101588534A - Interconnection equipment of internet protocol television (IPTV) system based on IP multimedia subsystem (IMS) and methods for starting same, requesting broadcasting of programs and broadcasting progr - Google Patents
Interconnection equipment of internet protocol television (IPTV) system based on IP multimedia subsystem (IMS) and methods for starting same, requesting broadcasting of programs and broadcasting progr Download PDFInfo
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Abstract
The invention provides interconnection equipment of an internet protocol television (IPTV) system based on an IP multimedia subsystem (IMS) and methods for starting the same, requesting the broadcasting of programs and broadcasting programs lively. The interconnection equipment comprises a visit network and an affiliation network, wherein the visit network is used for accepting the visit of user equipment (UE) and comprises a transmission function entity, a user profile server function (UPSF) entity, a Core IMS and an internet border control function (IBCF) entity, and the affiliation network to which the UE is affiliated comprises a Core IMS, an application entity, an IPTV service control function entity, a transmission function entity, an IPTV media function (MF) entity and an IBCF entity. The invention realizes the roaming and the nomadism of the IPTV user in any region and improves the core competitiveness of an IPTV system.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of interconnection device and program request, program request and live broadcasting method of the IPTV system based on IMS.
Background technology
At present, the frame structure of next-generation communication network (Next Generation Network abbreviates NGN as) is definite substantially.Except management layer, NGN also comprises user level, transmission aspect, service control layer face and application etc.IP Multimedia System (IMS, IPMultimedia Subsystem) is the major function entity sets of service control layer face.Can realize registration, authentication, authentication, QoS (Quality ofService, the service quality) management and assurance of user and terminal equipment by IMS; Simultaneously, IMS support multiple user's access technology, support user nomadic and mobile management, support and other legacy networks or next generation network intercommunication, the fusion of supporting business.IMS is based on SIP's (Session InitiationProtocol, session initiation protocol).IMS has been considered to major technique and the architectural framework that next generation network merges.
IPTV, be called IPTV (Internet Protocol Television again, IPTV), be meant professional general names such as live, the program request of the TV programme that can support interaction capabilities and time shifting broadcasting are provided to the user by the IP bearer network.IPTV passes through telecommunication path, utilize ADSL (Asymmetrical Digital Subscriber Line Asymmetrical Digital Subscriber Line) or Ethernet access band net, transmit TV signal by Internet protocol, add set-top box (STB with television set, Set Top Box) is main terminal, the multiple digital media service that comprises TV programme is provided.
Based on the fusion of NGN and IPTV is a research focus, present research and commercial case study the stage of the framework discussion of same next generation network inside based on IMS and program request, live and recording function flow process.
Yet in realizing process of the present invention, the inventor finds, also has the problem that interconnects different between based on the next generation network of IMS, and this causes operator can not carry out service operation and management uniformly, thereby has reduced the operation management ability of IPTV.
For example, under present NGN IMS framework, the user can't roam in based on the next generation network of IMS different.
Summary of the invention
The present invention aims to provide a kind of interconnection device and program request, program request and live broadcasting method of the IPTV system based on IMS, to solve the problem that user's roaming condition in the prior art uses the IPTV business down.
In an embodiment of the present invention, a kind of interconnection device of the IPTV system based on IMS is provided, comprise: visited network, be used to accept subscriber equipment (User Equipment, abbreviate UE as) visit, it comprises transfer function entity, subscriber information server functional entity (User Profile Server Functions abbreviates UPSF as), Core IMS and IBCF; Home network, UE belongs to home network, it comprises Core IMS (core IMS), use and IPTV business function entity, the transfer function entity, IPTV MF (Media Function, media function) interruption controls functional entity (Intermediate BreakoutControl Function and between medium, abbreviate IBCF as), the transfer function entity comprises: transmission controlled function entity, it comprises Network Attachment Subsystem (Network Attachment Subsystem, abbreviate NASS as) and resource access subsystem (Resource Access Subsystem abbreviates RACS as); The transmission process functional entity; IPTV MF comprises: IPTV media control function entity (Media Control Functions abbreviates MCF as) and IPTV media delivery function (IPTV Media Delivery Functions abbreviates IPTV MDF as); IPTV business function entity comprises: UPSF, IPTV business control function body (IPTV ServiceControl Functions abbreviates IPTV SCF as); Wherein, IBCF is used for the gateway control function between visited network and the home network, the Core IMS of visited network connects the IBCF of visited network, and the Core IMS of home network connects the IBCF of home network, and the IBCF of visited network is connected by the Gi interface with the IBCF of home network.
Preferably, IPTV SCF connects UE by Ut.
Preferably, the Core IMS of visited network connects UE by Gm, by the NASS of e2 connection visited network, connects the RACS of visited network by Gq interface; The Core IMS of home network passes through the RACS that Gq ' interface connects home network by the NASS of e2 connection home network; The NASS of home network is by the NASS of gn interface connection visited network, and the RACS of home network connects the RACS of visited network by Gr interface.
Preferably, the NASS of visited network connects UE by the Gt interface.
Preferably, IPTV MCF connects UE by the Xc interface.
Preferably, IPTV MDF connects UE by the Xd interface.
Preferably, IPTV business function entity also comprises: service selection functional entity (ServiceSelection Functions abbreviates SSF as), and it connects UE by the Xa interface; And service discovering functional entity (Service Discovery Functions abbreviates SDF as), it connects the Core IMS of home network by the UPSF of Sh interface connection home network by ISC interface.
In an embodiment of the present invention, a kind of UE startup method of interconnection device of the IPTV system based on IMS also is provided, visited network in the UE visit interconnection device, and the home network in the ownership interconnection device, may further comprise the steps: step a, the NASS in the visited network receives the network attachment request of UE; Step b, the parameter that the NASS of visited network will be used for network attachment returns to UE; Step c, the Core IMS of visited network receives the IMS register requirement from UE; Steps d, the Core IMS of visited network judges the Core IMS of the home network that it belongs to according to the address information of UE, and the IMS register requirement sent to the Core IMS of home network, the Core IMS of home network returns registering result information to the Core of visited network IMS; Step e, the Core IMS of visited network is to UE feedback registering result information; Step f, the SDF of home network is to the address configuration information of the legal business of UE feedback and the information relevant with the ability of UE; Step g, the SSF of home network receives the selection service request from UE, and feeds back professional relevant concrete data message so that the user selects suitable business to UE.
Preferably, the SDF of home network receives that the business of UE adheres to request back execution in step f.
Preferably, the SDF of home network just asks initiatively execution in step f without UE.
Preferably, the network attachment request comprises the discovery of proxy call conversation control function entity among the Core IMS of configuration information, home network of IP address of terminal.
Preferably, comprise in the parameter that home network distributes to the address information of proxy call conversation control function entity among the Core IMS of the IP address information of UE and home network.
In an embodiment of the present invention, a kind of order method of interconnection device of the IPTV system based on IMS also is provided, UE is in the visited network in the interconnection device, and belong to home network in the interconnection device, may further comprise the steps: step a: the CoreIMS of visited network receives the conversation initialization request that UE initiates, with the request demand (telecommunication) service; Step b: the Core IMS of visited network sends the conversation initialization request to the Core of home network IMS; Step c: the Core IMS of home network sends the conversation initialization request to the SCF of home network; Steps d: SCF sends the conversation initialization request to the MF of home network; Step e, the foundation of carrying out content control between MF and the UE and/or paying channel; Step f:MF sends conversation initialization to SCF and replys; Step g: SCF sends conversation initialization to the Core of home network IMS and replys; Step h, the Core IMS of home network is reserved resource before the RACS of home network submits to, with the content control of opening visited network and/or the passage of paying content; Step I: the Core IMS of home network sends conversation initialization to the Core of visited network IMS and replys; Step j, the Core IMS of visited network is reserved resource before the RACS of visited network submits to, and with the content control of opening visited network and/or the passage of paying content, the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Step k, the Core IMS of visited network sends conversation initialization to UE and replys; And step l, UE reply according to conversation initialization and MF between connect, accept the content stream among the MF.
Preferably, execution in step e after UE initiates the medium request specifically comprises: step ea: the medium that the Core IMS of visited network receives the UE transmission provide request, and medium provide request to comprise content control and/or content delivery channel; Step eb: the CoreIMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Step ec: the CoreIMS of home network initiates medium to the Core of home network IMS request is provided; Step ed: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys; Step ee: the Core IMS of home network initiates medium to SCF request is provided; Step ef:SCF sends medium to MF request is provided; Step eg:MF provides to SCF initiation medium and replys, to return the information that comprises content control and/or content delivery channel; Step eh:SCF provides to the Core of home network IMS transmission medium and replys; Step ej: the Core IMS of home network provides to the Core of visited network IMS transmission medium and replys; Step el: the Core IMS of home network provides to UE transmission medium and replys.
Preferably, between step eh and step ej, also comprise: step ei, the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys; Between step ej and step el, also comprise: step ek, the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys.
Preferably, execution in step e after the request of MF initiation medium, specifically comprise: step ea:MF sends medium to SCF request is provided, and the medium request comprises content control and/or content delivery channel; Step eb:SCF sends medium to the Core of home network IMS request is provided; Step ec: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys; Step ed: the Core IMS of home network sends medium to the Core of visited network IMS request is provided; Step ee: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Step ef: the Core IMS of visited network initiates medium to UE request is provided; Step eg: the medium that visited network Core IMS reception UE initiates provide replys, to return the information that comprises content control and/or content delivery channel; Step ei: the Core IMS of visited network provides to the Core of home network IMS transmission medium and replys; Step ek: the Core IMS of home network provides to SCF transmission medium and replys; Step el:SCF returns medium to UE and provides and reply.
Preferably, between step eg and step ei, also comprise: step eh, the Core IMS of visited network sends resource reservation request to the RACS of visited network; The RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Between step ei and step ek, also comprise: step ej, the Core IMS of home network sends resource reservation request to the RACS of home network; The RACS of home network sends resource reservation to the Core of home network IMS and replys.
In an embodiment of the present invention, a kind of live broadcasting method of interconnection device of the IPTV system based on IMS also is provided, UE is in the visited network in the interconnection device, and belong to home network in the interconnection device, may further comprise the steps: step a: the CoreIMS of visited network receives the conversation initialization request that UE initiates, with the request live broadcast service; Step b: the Core IMS of visited network sends the conversation initialization request to the Core of home network IMS; Step c: the Core IMS of home network sends the conversation initialization request to the SCF of home network; Steps d, the foundation of carrying out content control between SCF and the UE and/or paying channel; Step e:SCF sends conversation initialization to the Core of home network IMS and replys; Step f, the Core IMS of home network is reserved resource before the RACS of home network submits to, with the passage of the content delivery of opening home network; Step g: the Core IMS of home network sends conversation initialization to the Core of visited network IMS and replys; Step h, the Core IMS of visited network is reserved resource before the RACS of visited network submits to, with the passage of the content delivery of opening visited network; Step I, the Core IMS of visited network sends conversation initialization to UE and replys; And step j, UE reply according to conversation initialization and multicast control point/multicast replication point between connect, accept multicast data flow.
Preferably, execution in step d after UE initiates the medium request specifically comprises: steps d a: the medium that the Core IMS of visited network receives the UE transmission provide request, and medium provide request to comprise the content delivery channel; Steps d b: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Steps d c: the Core IMS of visited network initiates medium to the Core of home network IMS request is provided; Steps d d: the CoreIMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys; Steps d e: the CoreIMS of home network sends medium to SCF request is provided; Steps d f:SCF provides to the Core of home network IMS initiation medium and replys, to return the information that comprises the content delivery channel; Steps d h: the Core IMS of home network provides to the Core of visited network IMS transmission medium and replys; Steps d j: the Core IMS of visited network provides to UE transmission medium and replys.
Preferably, also comprise between steps d f and steps d h: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Also comprise between steps d h and steps d j: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys.
Preferably, execution in step d specifically comprised after MF initiated the medium request: steps d a:SCF sends medium to the Core of home network IMS request is provided, and medium provide request to comprise the content delivery channel; Steps d b: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys; Steps d c: the Core IMS of home network initiates medium to the CoreIMS of visited network request is provided; Steps d d: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Steps d e, the Core IMS of visited network sends medium to UE request is provided; Steps d f, the medium that the Core IMS reception UE of visited network initiates provide replys, to return the information that comprises the content delivery channel; Steps d h: the Core IMS of visited network provides to the Core of home network IMS transmission medium and replys; Steps d j: the Core IMS of home network provides to SCF transmission medium and replys.
Preferably, also comprise between steps d f and steps d h: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys; Also comprise between steps d h and steps d j: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys.
Interconnection device and program request, program request and the live broadcasting method based on the IPTV system of IMS of the above embodiment of the present invention, overcome the problem of using the IPTV business in the prior art under user's roaming condition, realized that IPTV user in the roaming of arbitrary region and nomadic, has promoted the core competitiveness of IPTV system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the block diagram based on the interconnection device of the IPTV system of IMS according to the embodiment of the invention;
Fig. 2 shows according to the preferred embodiment of the invention the block diagram based on the interconnection device of the IPTV system of IMS;
Fig. 3 shows the message flow chart according to the UE startup method of the embodiment of the invention;
Fig. 4 shows the schematic diagram according to the interconnection device of Fig. 3 embodiment;
Fig. 5 shows the message flow chart according to the order method of the embodiment of the invention;
Fig. 6 shows the schematic diagram according to the interconnection device of Fig. 5 embodiment;
Fig. 7 shows the message flow chart of order method according to the preferred embodiment of the invention;
Fig. 8 shows the message flow chart of order method according to the preferred embodiment of the invention;
Fig. 9 shows the message flow chart according to the live broadcasting method of the embodiment of the invention;
Figure 10 shows the message flow chart of live broadcasting method according to the preferred embodiment of the invention;
Figure 11 shows the message flow chart of live broadcasting method according to the preferred embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Fig. 1 shows the block diagram based on the interconnection device of the IPTV system of IMS according to the embodiment of the invention, comprising: visited network 10, be used to accept the visit of UE 102, and it comprises transfer function entity 114, UPSF 104, Core IMS 106 and IBCF; Home network, UE belong to home network 20, and it comprises Core IMS 206, application and IPTV business function entity 224, transfer function entity 214, IPTV MF 220 and IBCF,
Transfer function entity 114 and 214 comprises: transmission controlled function entity 112 and 212, and it comprises NASS 108 and 208 and RACS 110 and 210; Transmission process functional entity 116 and 216;
IPTV MF 220 comprises: IPTV MCF 218 and IPTV MDF 222;
IPTV business function entity comprises: UPSF 104 and 204, IPTV SCF 202;
Wherein, IBCF is used for the gateway control function between visited network and the home network, the Core IMS of visited network connects the IBCF of visited network, and the Core IMS of home network connects the IBCF of home network, and the IBCF of visited network is connected by the Gi interface with the IBCF of home network.
Preferably, IPTV SCF connects UE by Ut.
Preferably, the Core IMS of visited network connects UE by Gm, by the NASS of e2 connection visited network, connects the RACS of visited network by Gq interface; The Core IMS of home network passes through the RACS that Gq ' interface connects home network by the NASS of e2 connection home network; The NASS of home network is by the NASS of gn interface connection visited network, and the RACS of home network connects the RACS of visited network by Gr interface.
Preferably, the NASS of visited network connects UE by the Gt interface.
Preferably, IPTV MCF connects UE by the Xc interface.
Preferably, IPTV MDF connects UE by the Xd interface.
Fig. 2 shows according to the preferred embodiment of the invention the block diagram based on the interconnection device of the IPTV system of IMS, and IPTV business function entity also comprises: SSF 226, and it connects UE 102 by the Xa interface; And SDF 228, it connects the Core IMS 206 of home network by the UPSF 204 of Sh interface connection home network 20 by ISC interface.
The specific explanations of each module of the interconnection device that more than relates to is as follows:
UE (User Equipment), subscriber terminal equipment can be the mobile phone with locomotivity; Also can be the set-top box of fixed network or the software terminal of realizing set-top box functionality, also comprise functions such as home gateway based on the software realization.This terminal equipment and user interactions can be watched as program request, IPTV business such as live.
Core IMS (Core IP Multimedia Subsystem) module corresponding to the major function entity sets of service control layer face in the NGN network, mainly comprises nucleus modules such as P-CSCF/I-CSCF/S-CSCF kernel call session control.This functional entity provides the session control mechanism on SIP basis, provide IPTV terminal use's authentication, authentication, request resource access control (RACS) function to carry out resource allocation work, this module is also carried out the SIP session alternately with IPTV terminal, IPTV application function and content distribution function, finishes functions such as safety, Qos, charging, roaming;
IPTV service control function (IPTV Service Control Functions) module, this mould is a sip application server, provide service authentication in session initiation or modification, this comprises the information of checking the user, checks the content that the user whether can legal use selects; Credit limit and credit control; Select relevant media function etc., this function is primarily aimed at IPTV business such as program request, live, video recording, time shift.
Subscriber information server function (User Profile Server Functions) is called for short UPSF, comprises the information of the user data that the IPTV business is provided.
IPTV media function (IPTV Media Functions is called for short MF): comprise IPTV media control function and IPTV media delivery function.As described below respectively.
IPTV media control function (IPTV Media Control Functions) mainly comprises following function:
● the Media Stream of control MDF
● the medium of management MDF are handled
● the state of monitoring MDF
● mutual (for example technique mode " trick mode " order) of management and terminal
● processing is mutual with IPTV service control function SCF's
● accurately monitor this function content distribution and the state relevant control with different MDF
● when a MCF controls a plurality of MDF, select to provide the MDF of service according to certain strategy
● select the MF function, the result who selects is returned to SCF and the session that is redirected is returned to the MF function (for example, when the content of request between this MF function or MF during load balancing) of selection
● produce charge information, for example the terminal use based on view content charges.
● IPTV media delivery function (IPTV Media Delivery Functions), the function that mainly comprises is as follows:
● handle the payment (paying media business) of Media Stream to the user
● provide status report to MCF (for example IPTV Media Stream of report foundation).
● medium (for example content of program request), may also store the media business relevant information of some IPTV business.
● under the particular case, it can be used to store the content of frequent visit or user's related content (for example the content that produces of the live broadcast service of PVR, time shift, technique mode, user etc.) under same task be can't help situation that terminal finishes.
● as the media formats (for example, the decomposing force of television system depend on terminal capability or customer parameter select) (optional) of extra processing, coding or decoding (if desired) medium to different needs
● finish content protection function (for example content-encrypt) (optional)
● support obtain (optional) of IPTV media content
● for live broadcast service, this function is as the multicast source (optional) of live Media Stream
Transmission process function (Transport Processing Functions) is represented network insertion connection and IP kernel heart function, is responsible for the transmission of data under the prerequisite that ensures QoS.
IB CF (Intermediate Breakout Control Function) module, promptly middle mutual control module as carrying out the mutual gateway control function of sip message between two Core IMS, also can be used as the charging triggering function.
Resource access subsystem (Resource and Admission Control Subsystem) module, RACS assembly in the NGN network, this module is finished the resource control request from Core IMS module, determine the resource of available transmission, finish functions such as RSVP, distribution, bag are overanxious, Network address port translation alternately with bearing bed.
Business game decision making function (Service Policy Decision Function is called for short SPDF), this function is in resource access subsystem inside, is used for the interface module with external resource access subsystem.This function conduct is the final policy decision point of resource access subsystem inside separately, also as initiate resource reservation, resource modifying, resource submission request to other business game decision making functions.
Network Attachment Subsystem (Network Attachment Subsystem) module, NASS assembly in the NGN network, the initial work that provides the registration of access aspect and user terminal to insert the NGN business also provides authentication, the authentication of transport layer, the functions such as IP address space of management Access Network.
User access authorization function (User Access Authorization Function is called for short UAAF): finish subscription authentication, authorization check based on NASS user profile in network access layer; Can finish from the NASS user of each mandate and collect user's metering data; Also can be used as an agency, this moment UAAF can find and and other the UAAF server of NASS at user place of mandate communicate, UAAF agency can be forwarded to access, mandate and the charging request of the access management function AMF among its NASS the UAAF acting server of other NASS, and the response concurrent that can act on behalf of the UAAF acting server of accepting other NASS is delivered among the access management function AMF.
Further, communicate between the transmission process function of visited network and the transmission process function of home network, this function alternately can process IP TV MDF media flow transmission in UE and the control messages of the Media Stream between process IP TV MCF and the UE.
Further, communicate between the NASS of the NASS of visited network and home network.Be used to transmit the request of UE to the network attachment of home network.
Further, communicate between the RACS of the RACS of visited network and home network.Be used to transmit the resource access control request of UE to home network.The RACS that is used for home network asks its medium data transmission path of opening the transmission process function of visited network to the RACS of visited network, makes the transmission process function of visited network can accept the content flow data of IPTV.
Further, between the NASS function of terminal UE and visited network interface is arranged, this interface is responsible for terminal to the NASS of transmission controlled function request network attachment parameter information, and required parameter comprises the IP address configuration information of terminal UE, the address information of the P-CSCF among the Core IMS etc.
Other interfaces meet the interface that defines in the IPTV architecture standard of existing standard based on IMS, do not repeat them here.
Fig. 3 shows the message flow chart according to the UE startup method of the embodiment of the invention, and wherein, the visited network in the UE visit interconnection device, and the home network in the ownership interconnection device may further comprise the steps:
Step 2, the parameter that the NASS of visited network will be used for network attachment returns to UE;
Step 3, the Core IMS of visited network receives the IMS register requirement from UE;
Step 4, the Core IMS of visited network judges the Core IMS of the home network that it belongs to according to the address information of UE, and the IMS register requirement sent to the Core IMS of home network, the Core IMS of home network returns registering result information to the Core of visited network IMS;
Step 5, the Core IMS of visited network is to UE feedback registering result information;
Preferably, the SDF of home network receives that the business of UE adheres to request back execution in step 6.
Preferably, the SDF of home network just asks initiatively execution in step 6 without UE.
Preferably, the network attachment request comprises the discovery of proxy call conversation control function entity among the Core IMS of configuration information, home network of IP address of terminal.
Preferably, comprise in the parameter that home network distributes to the address information of proxy call conversation control function entity among the Core IMS of the IP address information of UE and home network.
Fig. 4 shows the schematic diagram according to the interconnection device of Fig. 3 embodiment, comprising: visited network 10, be used to accept the visit of UE 102, and it comprises Core IMS 106 and NASS108; Home network 20, UE belongs to home network, and it comprises Core IMS 206, NASS 208, SSF 226 and SDF 228.
Fig. 5 shows the message flow chart according to the order method of the embodiment of the invention, and wherein, UE is in the visited network in the interconnection device, and belongs to the home network in the interconnection device, may further comprise the steps:
Step 1: the Core IMS of visited network receives the conversation initialization request that UE initiates, with the request demand (telecommunication) service;
Step 2: the Core IMS of visited network sends the conversation initialization request to the Core of home network IMS;
Step 3: the Core IMS of home network sends the conversation initialization request to the SCF of home network;
Step 4:SCF sends the conversation initialization request to the MF of home network;
Step 5, the foundation of carrying out content control between MF and the UE and/or paying channel;
Step 6:MF sends conversation initialization to SCF and replys;
Step 7:SCF sends conversation initialization to the Core of home network IMS and replys;
Step 8, the Core IMS of home network is reserved resource before the RACS of home network submits to, with the content control of opening visited network and/or the passage of paying content;
Step 9: the Core IMS of home network sends conversation initialization to the Core of visited network IMS and replys;
Step 10, the Core IMS of visited network is reserved resource before the RACS of visited network submits to, and with the content control of opening visited network and/or the passage of paying content, the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Step 11, the Core IMS of visited network sends conversation initialization to UE and replys; And
Step 12, UE reply according to conversation initialization and MF between connect, accept the content stream among the MF.
Fig. 6 shows the schematic diagram according to the interconnection device of Fig. 5 embodiment, comprising: visited network 10, be used to accept the visit of UE 102, and it comprises Core IMS 106 and RACS110; Home network 20, UE belongs to home network, and it comprises Core IMS 206, RACS210, SCF 202 and MF 220.
Preferably, execution in step 5 after UE initiates the medium request, Fig. 7 shows the message flow chart of the order method of this preferred embodiment of the present invention, specifically comprises:
Step 1: the medium that the Core IMS of visited network receives the UE transmission provide request, and medium provide request to comprise content control and/or content delivery channel;
Step 2: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Step 3: the Core IMS of home network initiates medium to the Core of home network IMS request is provided;
Step 4: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys;
Step 5: the Core IMS of home network initiates medium to SCF request is provided;
Step 6:SCF sends medium to MF request is provided;
Step 7:MF provides to SCF initiation medium and replys, to return the information that comprises content control and/or content delivery channel;
Step 8:SCF provides to the Core of home network IMS transmission medium and replys;
Step 10: the Core IMS of home network provides to the Core of visited network IMS transmission medium and replys;
Step 12: the Core IMS of home network provides to UE transmission medium and replys.
Preferably, between step e8 and step 10, also comprise: step 9, the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys;
Between step 10 and step 12, also comprise: step 11, the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys.
Preferably, execution in step e after the request of MF initiation medium, Fig. 8 shows the message flow chart according to the order method of the preferred embodiment, specifically comprises:
Step 1:MF sends medium to SCF request is provided, and the medium request comprises content control and/or content delivery channel;
Step 2:SCF sends medium to the Core of home network IMS request is provided;
Step 3: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys;
Step 4: the Core IMS of home network sends medium to the Core of visited network IMS request is provided;
Step 5: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Step 6: the Core IMS of visited network initiates medium to UE request is provided;
Step 7: the medium that visited network Core IMS reception UE initiates provide replys, to return the information that comprises content control and/or content delivery channel;
Step 9: the Core IMS of visited network provides to the Core of home network IMS transmission medium and replys;
Step 11: the Core IMS of home network provides to SCF transmission medium and replys;
Step 12:SCF returns medium to UE and provides and reply.
Preferably, between step 7 and step 9, also comprise: step 8, the Core IMS of visited network sends resource reservation request to the RACS of visited network; The RACS of visited network sends resource reservation to the Core of visited network IMS and replys.
Between step 9 and step 11, also comprise: step 10, the Core IMS of home network sends resource reservation request to the RACS of home network; The RACS of home network sends resource reservation to the Core of home network IMS and replys.
Fig. 9 shows the message flow chart according to the live broadcasting method of the embodiment of the invention, and wherein, UE is in the visited network in the interconnection device, and belongs to the home network in the interconnection device, may further comprise the steps:
Step 1: the Core IMS of visited network receives the conversation initialization request that UE initiates, with the request live broadcast service;
Step 2: the Core IMS of visited network sends the conversation initialization request to the Core of home network IMS;
Step 3: the Core IMS of home network sends the conversation initialization request to the SCF of home network;
Step 4, the foundation of carrying out content control between SCF and the UE and/or paying channel;
Step 5:SCF sends conversation initialization to the Core of home network IMS and replys;
Step 7: the Core IMS of home network sends conversation initialization to the Core of visited network IMS and replys;
Step 8, the Core IMS of visited network is reserved resource before the RACS of visited network submits to, with the passage of the content delivery of opening visited network;
Step 9, the Core IMS of visited network sends conversation initialization to UE and replys; And
Step 10, UE reply according to conversation initialization and multicast control point/multicast replication point between connect, accept multicast data flow.
Preferably, execution in step 4 after UE initiates the medium request, Figure 10 shows the message flow chart according to the live broadcasting method of the preferred embodiment, specifically comprises:
Step 1: the medium that the Core IMS of visited network receives the UE transmission provide request, and medium provide request to comprise the content delivery channel;
Step 2: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Step 3: the Core IMS of visited network initiates medium to the Core of home network IMS request is provided;
Step 4: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys;
Step 5: the Core IMS of home network sends medium to SCF request is provided;
Step 6:SCF provides to the Core of home network IMS initiation medium and replys, to return the information that comprises the content delivery channel;
Step 8: the Core IMS of home network provides to the Core of visited network IMS transmission medium and replys;
Step 10: the Core IMS of visited network provides to UE transmission medium and replys.
Preferably, between step 6 and step 8, also comprise: step 7, the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Between step 8 and step 10, also comprise: step 9, the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys.
Preferably, execution in step d after the request of MF initiation medium, the message flow chart that Figure 11 shows according to the live broadcasting method of the preferred embodiment specifically comprises:
Step 1:SCF sends medium to the Core of home network IMS request is provided, and medium provide request to comprise the content delivery channel;
Step 2: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys;
Step 3: the Core IMS of home network initiates medium to the Core of visited network IMS request is provided;
Step 4: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Step 5, the Core IMS of visited network sends medium to UE request is provided;
Step 8: the Core IMS of visited network provides to the Core of home network IMS transmission medium and replys;
Step 10: the Core IMS of home network provides to SCF transmission medium and replys.
Preferably, also comprise between step 6 and step 8: the Core IMS of visited network sends resource reservation request to the RACS of visited network, and the RACS of visited network sends resource reservation to the Core of visited network IMS and replys;
Also comprise between step 8 step 10: the Core IMS of home network sends resource reservation request to the RACS of home network, and the RACS of home network sends resource reservation to the Core of home network IMS and replys.
From above description, as can be seen, interconnection device and program request, program request and the live broadcasting method based on the IPTV system of IMS of the above embodiment of the present invention, overcome the problem of using the IPTV business in the prior art under user's roaming condition, realized that IPTV user in the roaming of arbitrary region and nomadic, has promoted the core competitiveness of IPTV system.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. interconnection device based on the IPTV system of IP multimedia subsystem, IMS, it is characterized in that, comprise: visited network, be used to accept the visit of subscriber equipment, it comprises interruption controls functional entity between transfer function entity, subscriber information server functional entity, core IP multimedia subsystem, IMS and medium; Home network, described subscriber equipment belongs to described home network, it comprises interruption controls functional entity between core IP multimedia subsystem, IMS, application and IPTV business function entity, transfer function entity, IPTV media function entity and medium
Described transfer function entity comprises:
Transmission controlled function entity, it comprises Network Attachment Subsystem and resource access subsystem;
The transmission process functional entity;
IPTV media function entity comprises: IPTV media control function entity and IPTV media delivery functional entity;
IPTV business function entity comprises: subscriber information server functional entity, IPTV business control function body;
Wherein, the interruption controls functional entity is used for the gateway control function between described visited network and the described home network between described medium, the core IP multimedia subsystem, IMS of described visited network connects interruption controls functional entity between the medium of described visited network, the core IP multimedia subsystem, IMS of described home network connects interruption controls functional entity between the medium of described home network, between the medium of described visited network between the medium of interruption controls functional entity and described home network the interruption controls functional entity be connected by the Gi interface.
2. interconnection device according to claim 1, it is characterized in that, the core IP multimedia subsystem, IMS of described visited network connects described subscriber equipment by Gm, connect the Network Attachment Subsystem of described visited network by e2, connect the resource access subsystem of described visited network by Gq interface; The core IP multimedia subsystem, IMS of described home network connects the Network Attachment Subsystem of described home network by e2,
Pass through the resource access subsystem that Gq ' interface connects described home network; The Network Attachment Subsystem of described home network connects the Network Attachment Subsystem of described visited network by gn interface, and the resource access subsystem of described home network connects the resource access subsystem of described visited network by Gr interface.
3. interconnection device according to claim 1 is characterized in that the Network Attachment Subsystem of described visited network connects described subscriber equipment by the Gt interface.
4. interconnection device according to claim 1 is characterized in that, described IPTV media control function entity connects described subscriber equipment by the Xc interface.
5. interconnection device according to claim 1 is characterized in that, described IPTV media delivery functional entity connects described subscriber equipment by the Xd interface.
6. subscriber equipment startup method based on the interconnection device of the IPTV system of IP multimedia subsystem, IMS, it is characterized in that, subscriber equipment is visited the visited network in the described interconnection device, and belongs to the home network in the described interconnection device, may further comprise the steps:
Step a, the Network Attachment Subsystem in the described visited network receive the network attachment request of described subscriber equipment;
The parameter that step b, the Network Attachment Subsystem of described visited network will be used for network attachment returns to described subscriber equipment;
Step c, the core IP multimedia subsystem, IMS of described visited network receives the multimedia subsystem register request from described subscriber equipment;
Steps d, the core IP multimedia subsystem, IMS of described visited network is judged the core IP multimedia subsystem, IMS of the home network that it belongs to according to the address information of described subscriber equipment, and described multimedia subsystem register request sent to the core IP multimedia subsystem, IMS of described home network, the core IP multimedia subsystem, IMS of described home network returns registering result information to the core IP multimedia subsystem, IMS of described visited network;
Step e, the core IP multimedia subsystem, IMS of described visited network feeds back described registering result information to described subscriber equipment;
Step f, the service discovering functional entity of described home network is to the address configuration information of the legal business of described subscriber equipment feedback and the information relevant with the ability of described subscriber equipment;
Step g, the service selection functional entity of described home network receives the selection service request from described subscriber equipment, and feeds back professional relevant concrete data message so that the user selects suitable business to described subscriber equipment.
7. according to the subscriber equipment startup method of claim 6, it is characterized in that the service discovering functional entity of described home network receives that the business of described subscriber equipment adheres to request back execution in step f.
8. according to the subscriber equipment startup method of claim 6, it is characterized in that the service discovering functional entity of described home network is without described user equipment requests execution in step f just initiatively.
9. according to the subscriber equipment startup method of claim 6, it is characterized in that described network attachment request comprises the discovery of proxy call conversation control function entity in the core IP multimedia subsystem, IMS of the configuration information of IP address of terminal, described home network.
10. according to the subscriber equipment startup method of claim 6, it is characterized in that, comprise in the described parameter that described home network distributes to the address information of proxy call conversation control function entity in the core IP multimedia subsystem, IMS of described user device IP address information and described home network.
11. order method based on the interconnection device of the IPTV system of IP multimedia subsystem, IMS, it is characterized in that, subscriber equipment is in the visited network in the described interconnection device, and belongs to the home network in the described interconnection device, may further comprise the steps:
Step a: the core IP multimedia subsystem, IMS of described visited network receives the conversation initialization request that described subscriber equipment is initiated, with the request demand (telecommunication) service;
Step b: the core IP multimedia subsystem, IMS of described visited network sends described conversation initialization request to the core IP multimedia subsystem, IMS of described home network;
Step c: the core IP multimedia subsystem, IMS of described home network sends described conversation initialization request to the business control function body of described home network;
Steps d: described business control function body sends described conversation initialization request to the media function entity of described home network;
Step e, the foundation of carrying out content control between described media function entity and the described subscriber equipment and/or paying channel;
Step f: described media function entity sends conversation initialization to described business control function body and replys;
Step g: described business control function body sends described conversation initialization to the core IP multimedia subsystem, IMS of described home network and replys;
Step h, the core IP multimedia subsystem, IMS of described home network is reserved resource before the resource access subsystem of described home network is submitted to, with the content control of opening visited network and/or the passage of paying content;
Step I: the core IP multimedia subsystem, IMS of described home network sends described conversation initialization to the core IP multimedia subsystem, IMS of described visited network and replys;
Step j, the core IP multimedia subsystem, IMS of described visited network is reserved resource before the resource access subsystem of described visited network is submitted to, with the content control of opening visited network and/or the passage of paying content, the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Step k, the core IP multimedia subsystem, IMS of described visited network sends conversation initialization to described subscriber equipment and replys; And
Step l, described subscriber equipment reply according to conversation initialization and described media function entity between connect, accept the content stream in the described media function entity.
12. order method according to claim 11 is characterized in that, execution in step e after described subscriber equipment is initiated the medium request specifically comprises:
Step ea: the medium that the core IP multimedia subsystem, IMS of described visited network receives described subscriber equipment transmission provide request, and described medium provide request to comprise content control and/or content delivery channel;
Step eb: the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Step ec: the core IP multimedia subsystem, IMS of described home network is initiated medium to the core IP multimedia subsystem, IMS of described home network request is provided;
Step ed: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network sends described resource reservation to the core IP multimedia subsystem, IMS of described home network and replys;
Step ee: the core IP multimedia subsystem, IMS of described home network is initiated described medium to described business control function body request is provided;
Step ef: described business control function body sends described medium to described media function entity request is provided;
Step eg: described media function entity provides to described business control function body initiation medium and replys, to return the information that comprises content control and/or content delivery channel;
Step eh: described business control function body sends described medium to the core IP multimedia subsystem, IMS of described home network and provides and reply;
Step ej: the core IP multimedia subsystem, IMS of described home network sends described medium to the core IP multimedia subsystem, IMS of described visited network and provides and reply;
Step el: the core IP multimedia subsystem, IMS of described home network sends described medium to described subscriber equipment and provides and reply.
13. order method according to claim 12 is characterized in that,
Between step eh and step ej, also comprise: step ei, the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network;
Between step ej and step el, also comprise: step ek, the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network.
14. order method according to claim 11 is characterized in that, execution in step e after the request of described media function entity initiation medium specifically comprises:
Step ea: described media function entity sends medium to described business control function body request is provided, and described medium request comprises content control and/or content delivery channel;
Step eb: described business control function body sends described medium to the core IP multimedia subsystem, IMS of described home network request is provided;
Step ec: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network;
Step ed: the core IP multimedia subsystem, IMS of described home network sends described medium to the core IP multimedia subsystem, IMS of described visited network request is provided;
Step ee: the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Step ef: the core IP multimedia subsystem, IMS of described visited network is initiated medium to described subscriber equipment request is provided;
Step eg: described visited network core IP multimedia subsystem, IMS receives medium that described subscriber equipment initiates and provides and reply, to return the information that comprises content control and/or content delivery channel;
Step ei: the core IP multimedia subsystem, IMS of described visited network sends described medium to the core IP multimedia subsystem, IMS of described home network and provides and reply;
Step ek: the core IP multimedia subsystem, IMS of described home network sends described medium to described business control function body and provides and reply;
Step el: described business control function body returns described medium to described subscriber equipment and provides and reply.
15. order method according to claim 14 is characterized in that,
Between step eg and step ei, also comprise: step eh, the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network; The resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Between step ei and step ek, also comprise: step ej, the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network; The resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network.
16. live broadcasting method based on the interconnection device of the IPTV system of IP multimedia subsystem, IMS, it is characterized in that, subscriber equipment is in the visited network in the described interconnection device, and belongs to the home network in the described interconnection device, may further comprise the steps:
Step a: the core IP multimedia subsystem, IMS of described visited network receives the conversation initialization request that described subscriber equipment is initiated, with the request live broadcast service;
Step b: the core IP multimedia subsystem, IMS of described visited network sends described conversation initialization request to the core IP multimedia subsystem, IMS of described home network;
Step c: the core IP multimedia subsystem, IMS of described home network sends described conversation initialization request to the business control function body of described home network;
Steps d, the foundation of carrying out content control between described business control function body and the described subscriber equipment and/or paying channel;
Step e: described business control function body is replied to the core IP multimedia subsystem, IMS transmission conversation initialization of described home network;
Step f, the core IP multimedia subsystem, IMS of described home network is reserved resource before the resource access subsystem of described home network is submitted to, with the passage of the content delivery of opening home network;
Step g: the core IP multimedia subsystem, IMS of described home network sends described conversation initialization to the core IP multimedia subsystem, IMS of described visited network and replys;
Step h, the core IP multimedia subsystem, IMS of described visited network is reserved resource before the resource access subsystem of described visited network is submitted to, with the passage of the content delivery of opening visited network;
Step I, the core IP multimedia subsystem, IMS of described visited network sends conversation initialization to described subscriber equipment and replys; And
Step j, described subscriber equipment reply according to conversation initialization and multicast control point/multicast replication point between connect, accept multicast data flow.
17. live broadcasting method according to claim 16 is characterized in that, execution in step d after described subscriber equipment is initiated the medium request specifically comprises:
Steps d a: the medium that the core IP multimedia subsystem, IMS of described visited network receives described subscriber equipment transmission provide request, and described medium provide request to comprise the content delivery channel;
Steps d b: the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Steps d c: the core IP multimedia subsystem, IMS of described visited network is initiated medium to the core IP multimedia subsystem, IMS of described home network request is provided;
Steps d d: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network;
Steps d e: the core IP multimedia subsystem, IMS of described home network sends described medium to described business control function body request is provided;
Steps d f: described business control function body is initiated medium to the core IP multimedia subsystem, IMS of described home network to be provided and replys, to return the information that comprises the content delivery channel;
Steps d h: the core IP multimedia subsystem, IMS of described home network sends described medium to the core IP multimedia subsystem, IMS of described visited network and provides and reply;
Steps d j: the core IP multimedia subsystem, IMS of described visited network sends described medium to described subscriber equipment and provides and reply.
18. live broadcasting method according to claim 17 is characterized in that,
Also comprise between steps d f and steps d h: the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Also comprise between steps d h and steps d j: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network.
19. live broadcasting method according to claim 16 is characterized in that, execution in step d specifically comprised after described media function entity was initiated the medium request:
Steps d a: described business control function body provides request to the core IP multimedia subsystem, IMS transmission medium of described home network, and described medium provide request to comprise the content delivery channel;
Steps d b: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network;
Steps d c: the core IP multimedia subsystem, IMS of described home network is initiated medium to the core IP multimedia subsystem, IMS of described visited network request is provided;
Steps d d: the core IP multimedia subsystem, IMS of described visited network sends described resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Steps d e, the core IP multimedia subsystem, IMS of described visited network sends medium to described subscriber equipment request is provided;
Steps d f, the core IP multimedia subsystem, IMS of described visited network receive medium that described subscriber equipment initiates and provide and reply, to return the information that comprises the content delivery channel;
Steps d h: the core IP multimedia subsystem, IMS of described visited network sends described medium to the core IP multimedia subsystem, IMS of described home network and provides and reply;
Steps d j: the core IP multimedia subsystem, IMS of described home network sends described medium to described business control function body and provides and reply.
20. live broadcasting method according to claim 19 is characterized in that,
Also comprise between steps d f and steps d h: the core IP multimedia subsystem, IMS of described visited network sends resource reservation request to the resource access subsystem of described visited network, and the resource access subsystem of described visited network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described visited network;
Also comprise between steps d h and steps d j: the core IP multimedia subsystem, IMS of described home network sends resource reservation request to the resource access subsystem of described home network, and the resource access subsystem of described home network is replied to the core IP multimedia subsystem, IMS transmission resource reservation of described home network.
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| WO2011079732A1 (en) * | 2009-12-28 | 2011-07-07 | 深圳市同洲电子股份有限公司 | Method, center data gateway and system for realizing roaming of digital television reception terminal |
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