CN101459824B - Time shifted television service establishing method and time shifted television media functional entity - Google Patents
Time shifted television service establishing method and time shifted television media functional entity Download PDFInfo
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Abstract
The invention discloses a method for building time-shifting television service and an entity with the time-shifting television medium function used for realizing the time-shifting television service in an IMS network. The method of the invention comprises the following steps: receiving medium negotiation contained content delivery channel information and content control channel information initiated by a terminal by the entity with the time-shifting television medium function, building the transmission connection between the terminal according to the medium negotiation results, receiving the medium playing requirements transmitted by the terminal through the transmission connection, and transmitting medium information corresponding to the medium playing requirements to the terminal according to the content delivery channel built by the content delivery channel information. The invention further provides the entity with the time-shifting television medium function. The method can realize the time-shifting television service in the IMS network.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of time shifted TV business method for building up and time-moving television media function entity.
Background technology
Time shifted TV business is a kind of emerging streaming media service, at present a kind of solution based on existing IP network as shown in Figure 1, this system is by head end (Headend), middleware (Middleware), VOD system (VOD system) and set-top box formations such as (STB).
The basic process that realizes time shifted TV business in existing system is:
Set-top box 104 begins to obtain programme from middleware 102, adds the multicast group received television program of playing selected program according to programme in set-top box 104, and this program sends in the multicast mode;
If the user selects program to suspend, perhaps fast reverse operation, then set-top box 104 is sent request to middleware 102, and the clean culture program source that middleware 102 is corresponding with VOD system 103 mutual location is also transmitted the address to middleware 102, and middleware 102 returns to set-top box 104;
Set-top box 104 is obtained the clean culture program stream and is used enforcement stream protocol (RTSP, Real Time Streaming Protocol) that this program is controlled from VOD system 103 subsequently.If the user selects F.F. and catches up with programme televised live, then set-top box 104 switches to the multicast accepting state once more.
Such scheme is the scheme at existing IP network, employing HTTP/RTSP etc. realizes time shifted TV business as service request or control signaling, but IP Multimedia System (IMS at present develop rapidly, IP Multimedia Subsystem), do not have the clear and definite concrete mode that in the IMS system, realizes time shifted TV business in the prior art.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of time shifted TV business method for building up and time-moving television media function entity, can realize time shifted TV business in the IMS network.
The time shifted TV business method for building up that the embodiment of the invention provides comprises:
The content delivery channel information that time-moving television media function entity receiving terminal is initiated and the media negotiation of content control channel information;
According to described media negotiation result set up with described terminal between transmission be connected;
Connect the media play request that receiving terminal sends by described transmission;
Send the media information of described media play request correspondence to terminal by the content delivery channel of setting up according to the content delivery channel information behind the media negotiation.
The time shifted TV business method for building up that the embodiment of the invention provides comprises:
The operation information that the business control function body receiving terminal reports;
Send the conversation initialization request message to time-moving television media function entity;
Time-moving television media function entity is initiated the media negotiation request of content control channel information and content delivery channel information;
According to described media negotiation result set up with described terminal between transmission be connected;
Connect the media play request that receiving terminal sends by described transmission;
Send the media information of described media play request correspondence to terminal by the content delivery channel of setting up according to the content delivery channel information behind the media negotiation.
The time-moving television media function entity that the embodiment of the invention provides comprises:
The request message receiving element is used for the content delivery channel information of receiving terminal transmission and the request message of content control channel information;
Passage is set up control unit, be used for according to described content control channel information set up with described terminal between transmission be connected;
The request receiving element is used for connecting the media play request that receiving terminal sends by described transmission;
Media information returns the unit, is used for sending to terminal by the content delivery channel of described content delivery channel information correspondence the media information of described media play request correspondence.
As can be seen from the above technical solutions, the embodiment of the invention has the following advantages:
Because in the embodiment of the invention, the content delivery channel information that time-moving television media function entity receiving terminal sends and the request message of content control channel information, so time-moving television media function entity can be according to the content control passage that is used for control channel between content control channel information foundation that receives and the terminal, can be according to being used for the content delivery channel of transmitting realtime stream medium between foundation of content delivery channel information and the terminal, so can in the IMS system, realize time shifted TV business.
Description of drawings
Fig. 1 is a time shifted TV business system construction drawing in the prior art;
Fig. 2 is the time shifted TV business method for building up first embodiment flow chart in the embodiment of the invention;
Fig. 3 is the time shifted TV business method for building up second embodiment flow chart in the embodiment of the invention;
Fig. 4 is time shifted TV business method for building up the 3rd an embodiment flow chart in the embodiment of the invention;
Fig. 5 is time shifted TV business method for building up the 4th an embodiment flow chart in the embodiment of the invention;
Fig. 6 is time shifted TV business method for building up the 5th an embodiment flow chart in the embodiment of the invention;
Fig. 7 is the time-moving television media function entity first embodiment schematic diagram in the embodiment of the invention;
Fig. 8 is the time-moving television media function entity second embodiment schematic diagram in the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of time shifted TV business method for building up and time-moving television media function entity, is used for realizing time shifted TV business (TsTV, Time Shift TV) at the IMS network.
Time shifted TV business can be divided into following two types according to the form that the user enters time-moving television:
1) direct time shift mode: the user by suspending or the key that falls back, enters time shift by live when watching live telecast.
2) time shift channel mode: Electronic Program Guide (EPG, Electronic Program Guide) provide the time shift channel information, and the user can select the time shift video frequency program, selects to watch.
TsTV Business Processing process can be decomposed into following 4 basic subprocess, is specially:
A, business are set up process: mainly refer to the professional process of initially setting up.
B, VCR operating process: the user can carry out VCR operation (or being called Trick Mode) when watching time shifted TV business, as time-out, F.F., rewind down and redirect etc.
After C, the professional foundation, handoff procedure between clean culture and the multicast: in IMS Based IPTV system, live telecast (LTV), the normal multicast mode media stream that adopts, and time shifted TV business, under non-up-to-date broadcast state, (just playing the time shift content) and often adopting the mode of unicast media stream, often adopting multicast mode media stream and under up-to-date broadcast state, (just playing live content).After the time shifted TV business session was set up, the user can carry out the VCR operation, as F.F. or jump to up-to-date broadcast point, so trigger the switching between multicast and the clean culture load mode.
D, professional dispose procedure.
Above the TsTV business has been carried out recapitulative introduction, introduced the TsTV service establishing method in the embodiment of the invention below in detail, concrete, according to user mode access, the TsTV service establishing method in the embodiment of the invention can be divided into two classes:
One, direct time shift mode:
Under the manner, the TsTV service establishing method can be subdivided into four kinds of different embodiment again:
1, set up content delivery channel and content control passage simultaneously:
See also Fig. 2, TsTV service establishing method first embodiment comprises in the embodiment of the invention:
201, the user asks temporaty suspension;
Wherein, the user watches LTV, and delivery method is multicast, watches that the user asks temporaty suspension in the process.
User's request when watching the live telecast (LTV) of supporting VCR operation (or Trick Mode) suspends.
202, terminal withdraws from the multicast group to the basic controlling entity requests;
The play position information of terminal recording medium, and send the report leave the multicast group to the multicast point that live Media Stream is provided, in the present embodiment, do not need to send the report message that leaves the multicast group during based on IGMP 1.0 versions, but during based on IGMP 2.0 versions, then need to send the report message that leaves the multicast group, so this step is optional for condition.
203, the user asks to continue to play TV programme;
For example the user continues to play TV programme by the play button request of remote operation handle, because this moment, the user no longer received the multicast Media Stream, then needs to carry out the TsTV business and could make the user continue to watch TV programme.
204, terminal sends session change request;
Terminal sends session change request, content delivery channel and the content control passage media description information of (being connected as TCP) (SDP offer1) in the request to network (IMS Core).
In the present embodiment, can preserve as the case may be or the multicast Media Stream of the former live telecast of deexcitation.
205, transmit session change request;
After IMS Core receives the session change request message of terminal, IMS Core signalling route rule according to 3GPP IMS normalized definition, give the business control function body (SCF, Service Control Function) that live telecast is provided with the session change request forward pass of terminal.
206, initiation session initialization request;
After SCF receives session change request, message content according to session change request judges whether the user is just asking the TsTV business, the foundation of judging is a control channel information in the service identification information of carrying in the SIP header field in the session change request message content or the SDP message body, if judge when the user is just asking TsTV professional, SCF initiates the initial request of new session to time-moving television media function entity (the TsTV MF that the TsTV business is provided, Time Shift TV Media Function), the media description information of content delivery channel and content control passage (SDP Offer2) in the initial session request message.
Present embodiment is not done any qualification to the message routing mode between SCF and the TsTV MF, for example can be without IMS Core routing forwarding.
207, return the conversation initialization response message;
After providing the TsTV MF of time-shift service media resource to receive request, set up SIP session and RTSP session, generate the Session ID (SessionID) of RTSP session, distribute time shifted TV business to need media resource, return conversation initial response message (200 OK) then, the medium Answer information (SDP Answer2) of content delivery channel and content control passage in the message, and wait for the TCP establishment of connection.
208, return session change response message;
SCF sends session change response message (200 OK), the medium Answer information (SDP Answer1) of content delivery channel and content control passage in the message to IMS Core.
209, transmit session change response message;
IMS Core is to terminal forward pass session change response message (200 OK), the medium Answer information (SDP Answer1) of content delivery channel and content control passage in the message.
210～212, terminal is returned acknowledge message;
After terminal is received session change response message, preserve key message in the response message, as information such as media description and session ids, if adopt SIP reINVITE mechanism, terminal sends response confirmation message to IMS Core so, and message is sent to TsTV MF through SCF.
213, setting up carrying connects;
In the step in front, terminal, SCF and TsTV MF carry out media negotiation by interaction content delivery channel information and content control channel information.
Terminal is according to the media negotiation result, and the transmission of setting up the real-time stream protocol of carrying with TsTV MF is connected (connecting as TCP).
214, terminal sends media play request;
Terminal sends playing request message (RTSP PLAY) by the content control passage to TsTV MF, and message comprises session id, medium position information parameter informations such as (as playing absolute time).
215, return the media play response;
TsTV MF sends to terminal by the content control passage and plays message (RTSP 200OK).
216, media stream.
TsTV MF sends streaming medium content by content delivery channel to terminal.
Suspend with the user in the present embodiment and continue to watch be operating as the implementation that example has illustrated the TsTV business, be understandable that, can be other operation equally, for example F.F. or slow-motion or the like, the specific implementation flow process is similar.
Step 210 to step 215 is an optional step in the present embodiment, can select according to actual conditions.
Present embodiment is owing to send the session change request message of content delivery channel information and content control channel information by terminal, so TsTV MF can set up content control passage and content delivery channel according to these two parameters, so realized the TsTV business in the IMS system.
2, independently set up content delivery channel and content control passage:
See also Fig. 3, TsTV service establishing method second embodiment comprises in the embodiment of the invention:
301, the user asks temporaty suspension;
Wherein, the user watches LTV, and delivery method is multicast, watches that the user asks temporaty suspension in the process.
User's request when watching the LTV that supports VCR operation (or Trick Mode) suspends.
302, terminal withdraws from the multicast group to the basic controlling entity requests;
The play position information of terminal recording medium, and send the report leave the multicast group to the multicast point that live Media Stream is provided, in the present embodiment, do not need to send the report message that leaves the multicast group during based on IGMP 1.0 versions, but during based on IGMP 2.0 versions, then need to send the report message that leaves the multicast group, so this step is optional for condition.
303, the user asks to continue to play TV programme;
For example the user continues to play TV programme by the play button request of remote operation handle, because this moment, the user no longer received the multicast Media Stream, then needs to carry out the TsTV business and could make the user continue to watch TV programme.
304, terminal initiation session change request;
In the present embodiment, the content that comprises in the session change request has following two kinds of possibilities:
The content object sign (the Request-URI header field as RTSP comprises RTSP URI) that comprises time shift program in the session change request that A, terminal send;
The content object sign that does not comprise time shift program in the session change request that B, terminal send.
The media description information (SDPoffer1) of content control channel during then the session change of this step initiation is asked, the content object that might comprise time shift program in this information identifies.
In the present embodiment, can preserve as the case may be or the multicast Media Stream of the former live telecast of deexcitation.
305, transmit session change request;
After IMS Core receives the session change request message of terminal,, give the SCF that live telecast is provided with the session change request forward pass of terminal according to the IMS Core signalling route rule of 3GPP IMS normalized definition.
306, initiation session initialization request;
After receiving session change request, SCF judges the user according to the message content of session change request and is just asking time shifted TV business, SCF initiates the initial request of new session to the TsTVMF that time shifted TV business is provided, the media description information of content control channel in the initial session request message (SDP Offer2).
307, return the conversation initialization response;
After providing the TsTV MF of time-shift service media resource to receive request, set up the SIP session.
For above-mentioned situation A, TsTV MF sets up the RTSP session simultaneously, generates the Session ID (SessionID) of RTSP session, distributes time shifted TV business to need media resource;
For above-mentioned situation B, TsTV MF does not set up the RTSP session, content object identity in response message.
Return conversation initial response message (200 OK) then, the medium Answer information (SDP Answer2) of content control channel in the request, and wait for the TCP establishment of connection.
308, return session change response message;
SCF sends session change response message (200 OK), the medium Answer information (SDP Answer1) of content control channel in the message to IMS Core.
309, transmit session change response message;
IMS Core is to terminal forward pass session change response message (200 OK), the medium Answer information (SDP Answer1) of content control channel in the message.
310～312, terminal is returned acknowledge message;
After terminal is received session change response message, preserve key message in the response message, as information such as the media description of content control passage and session ids, if adopt SIP reINVITE mechanism, terminal sends response confirmation message to IMS Core so, and message is sent to TsTV MF through SCF.
313, setting up carrying connects;
In the step in front, terminal, SCF and TsTV MF carry out media negotiation by interaction content control channel information.
Terminal is connected (connecting as TCP) according to the media negotiation result with the transmission of setting up the real-time stream protocol of carrying between the TsTV MF.
313b, obtain media description information;
Terminal is by the content control passage set up the media description information to TsTV MF request content delivery channel, as send RTSP SUBSCRIBE request, TsTV MF returns response message (RTSP200 OK), the media description information of content delivery channel in the message to terminal.
314, initiation session change request;
Terminal sends session change request once more to IMS Core, and the medium of new content delivery channel capable (SDP Offer3) in the request message for above-mentioned situation B, increase the content object identification information in the medium of the content control passage of request are capable.
315, transmit session change request;
After IMS Core receives the session change request message of terminal,, the session change of terminal is asked to be routed to SCF according to the IMS Core signalling route rule of 3GPP IMS normalized definition.
316, send session change request;
After receiving session change request, corresponding TsTV MF is asked in the change of SCF initiation session, comprises the medium medium capable and content delivery channel capable (SDPOffer4) of content control passage in the session change request message.
317, return session change response;
After TsTV MF receives request, distribute time shifted TV business to need media resource, for above-mentioned situation B, TsTV MF sets up the RTSP session, comprises session id information in response message.Return conversation initial response message (200 OK) then, the medium Answer information (SDPAnswer4) of content control channel in the request.
318, return session change response;
SCF sends session change response message (200 OK), the medium Answer information (SDP Answer3) of content delivery channel and content control passage in the message to IMS Core.
319, transmit session change response;
IMS Core is to terminal forward pass session change response message (200 OK), the medium Answer information (SDP Answer3) of content delivery channel and content control passage in the message.
320～322, terminal is returned acknowledge message;
After terminal is received session change response message, preserve key message in the response message, as information such as media description and session ids, if adopt SIP reINVITE mechanism, terminal sends response confirmation message to IMS Core so, and message is sent to TsTV MF through SCF.
323, terminal sends media play request;
Terminal sends playing request message (RTSP PLAY) by the content control passage to TsTV MF, and message comprises session id, medium position information parameter informations such as (as playing absolute time).
324, return the media play response;
TsTV MF sends to terminal by the content control passage and plays message (RTSP 200OK).
325, media stream.
TsTV MF sends streaming medium content by content delivery channel to terminal.
Suspend with the user in the present embodiment and continue to watch be operating as the implementation that example has illustrated the TsTV business, be understandable that, can be other operation equally, for example F.F. or slow-motion or the like, the specific implementation flow process is similar.
The difference of present embodiment and TsTV service establishing method first embodiment is, content control passage and content delivery channel in the present embodiment are not to set up simultaneously, but set up the content control passage earlier, thereby the media description information that obtains content delivery channel by this content control passage is set up content delivery channel afterwards, so improved the flexibility of TsTV service establishing method in the embodiment of the invention.
3, report operation information to trigger the TsTV business:
See also Fig. 4, TsTV service establishing method the 3rd embodiment comprises in the embodiment of the invention:
401, the user asks temporaty suspension;
Wherein, the user watches LTV, and delivery method is multicast, watches that the user asks temporaty suspension in the process.
User's request when watching the LTV that supports VCR operation (or Trick Mode) suspends.
402, terminal withdraws from the multicast group to the basic controlling entity requests;
The play position information of terminal recording medium, and send the report leave the multicast group to the multicast control point that the multicast Media Stream is provided, in the present embodiment, do not need to send the report message that leaves the multicast group during based on IGMP 1.0 versions, but during based on IGMP 2.0 versions, then need to send the report message that leaves the multicast group, so this step is optional for condition.
403, the user asks to continue to play TV programme;
For example the user continues to play TV programme by the play button request of remote operation handle, because this moment, the user no longer received the multicast Media Stream, then needs to carry out the TsTV business and could make the user continue to watch TV programme.
404, transmit operation reports request;
May have two kinds of operation requests in the present embodiment and report, be respectively:
A, terminal to report button raw information (as keyboard-coding): terminal reports SCF with the raw information of button/operation of user, by the implication that SCF resolves button, in conjunction with business contexts, determines service request from user information.
B, terminal to report VCR operation information (as carrying similar RTSP protocol parameter Scale/Range information): terminal need be converted into the VCR operation information with button/operation of user, then the VCR operation information is reported SCF.
The concrete signaling realizing method that terminal reports to SCF has multiple, including but not limited to methods such as SIPMessage/Info mechanism, SIP Subscribe/Notify mechanism and non-SIP mechanism.
405, trigger the professional foundation of TsTV;
SCF judges the user according to business processing logic (LTV watches middle user to ask time-out/play operation) and asks time shifted TV business, so trigger the foundation of time shifted TV business.
406, initiation session initialization request;
SCF sends the conversation initial request to TsTV MF, does not comprise SDP message body in the request.
407, return the conversation initialization response;
After TsTV MF receives the conversation initial request, set up the SIP session, return conversation initial response message (200 OK), the media description information of content control channel and content delivery channel in the response (SDP offer1) to SCF.
408, send session change request;
After SCF receives the conversation initial response message of TsTV MF, send session change request, content control channel and content delivery channel media description information (SDP offer2) in the request to IMS Core.
409, transmit session change request;
IMS Core gives terminal according to IMS signalling route rule with the session change request forward pass of receiving.
410, terminal is returned session change response;
Terminal is received the session change request message of network, return session change response message, the medium Answer information (SDP answer2) of content control channel and content delivery channel in the response message according to terminal capability and business process rule to IMS Core then.
411, transmit session change response;
IMS Core gives SCF according to IMS signalling route rule with the session change response message forward pass of receiving.
412～413, sending the session change confirms;
SCF returns session change response and gives terminal, and message is through IMS Core route.
414, sending conversation initialization confirms;
SCF is according to the terminal session change response message of receiving, structure conversation initial acknowledge message, the medium Answer information (SDP answer1) of content control channel and content delivery channel in the message.
415, carry out subsequent step:
Wherein, follow-up flow process comprises:
A, terminal send media play request;
Terminal sends playing request message (RTSP PLAY) by the content control passage to TsTV MF, and message comprises session id, medium position information parameter informations such as (as playing absolute time).
B, return media play response;
TsTV MF sends to terminal by the content control passage and plays message (RTSP 200OK).
C, media stream.
TsTV MF sends streaming medium content by content delivery channel to terminal.
In the present embodiment, terminal triggers the TsTV business by reporting operation information, and concrete operation information type can be determined according to actual conditions, so improved the flexibility of TsTV service establishing method in the embodiment of the invention.
4, reporting service information triggers the TsTV business:
See also Fig. 5, TsTV service establishing method the 4th embodiment comprises in the embodiment of the invention:
501, the user asks temporaty suspension;
Wherein, the user watches LTV, and delivery method is multicast, watches that the user asks temporaty suspension in the process.
User's request when watching the LTV that supports VCR operation (or Trick Mode) suspends.
502, terminal withdraws from the multicast group to the basic controlling entity requests;
The play position information of terminal recording medium, and send the report leave the multicast group to the multicast control point that the multicast Media Stream is provided, in the present embodiment, do not need to send the report message that leaves the multicast group during based on IGMP 1.0 versions, but during based on IGMP 2.0 versions, then need to send the report message that leaves the multicast group, so this step is optional for condition.
503, the user asks to continue to play TV programme;
For example the user continues to play TV programme by the play button request of remote operation handle, because this moment, the user no longer received the multicast Media Stream, then needs to carry out the TsTV business and could make the user continue to watch TV programme.
504, initiation session change request;
Terminal determines that according to current business contexts and user's VCR operation the user is just asking time shifted TV business, so send session change request to IMS Core, do not comprise SDP message body in the request, comprise time shifted TV business information, identifying user is just asking the mode of television services including but not limited to the method that adopts service identification.
505, transmit session change request;
IMS Core gives terminal according to IMS signalling route rule with the session change request forward pass of receiving.
506, initiation session initialization request;
After SCF received the session change request message of terminal, according to time shifted TV business information in the request, SCF determined to need to trigger time shifted TV business, so send the conversation initial request to TsTV MF, does not comprise SDP message body in the request.
507, return the conversation initialization response;
TsTV MF sets up session after receiving the conversation initial request, and returns the conversation initial response message, the media description of content control channel and content delivery channel in the response message (SDP offer1).
508, return session change response;
SCF is according to session change response message and the business contexts information received, structure session change response message and message body, the media description information of content control channel and content delivery channel in the response message (SDP offer2).
509, transmit session change response;
IMS Core gives terminal according to IMS signalling route rule with the session change response message forward pass of receiving.
510, returning the session change confirms;
Terminal is received the session change response message of network, returns session change acknowledge message, the media answer of content control channel and content delivery channel in the acknowledge message (SDP answer2) according to terminal capability and business process rule to IMS Core then.
511, transmitting the session change confirms;
IMS Core gives SCF according to IMS signalling route rule with the session change acknowledge message forward pass of receiving.
512, returning conversation initialization confirms;
SCF constructs the conversation initial acknowledge message according to session acknowledge message and the business contexts information received, the medium Answer information (SDPanswer1) of bag content control passage and content delivery channel in the message.
513, carry out follow-up flow process;
Wherein, follow-up flow process comprises:
A, terminal send media play request;
Terminal sends playing request message (RTSP PLAY) by the content control passage to TsTV MF, and message comprises session id, medium position information parameter informations such as (as playing absolute time).
B, return media play response;
TsTV MF sends to terminal by the content control passage and plays message (RTSP 200OK).
C, media stream.
TsTV MF sends streaming medium content by content delivery channel to terminal.
In the present embodiment, terminal triggers the TsTV business by reporting service information, terminal is converted into service requesting information according to the current business context with button/operation of user, as just carrying out the LTV business, terminal judges goes out the user is just asking time shifted TV business, so the time-shift service solicited message is reported SCF, SCF calls suitable business processing logic according to service requesting information, as trigger the foundation of time shifted TV business, so improved the flexibility of TsTV service establishing method in the embodiment of the invention.
Two, time shift channel mode:
See also Fig. 6, TsTV service establishing method the 5th embodiment comprises in the embodiment of the invention:
601, browse EPG;
The user browses the EPG menu, selects to enter time shift channel submenu, selected specific time shift channel (promptly requiring to withdraw from play position or latest position is play since last time) and/or specify broadcast program or play position and request to watch.
602, initiation session initialization request;
Terminal sends the conversation initial request to IMS Core, and request comprises channel identication and program location information etc., but the media description (promptly not containing SDP) of content control channel or content delivery channel not.
603, transmit the conversation initialization request;
IMS Core gives SCF according to the routing rule of 3GPP IMS specification description with the conversation initial request forward pass of terminal.
604, initiation session initialization request;
After SCF receives the conversation initial request message, ask time shifted TV business according to the information Recognition user who carries in the request, set up session, user's request is watched the time shift channel and is not specified broadcast program or positional information, and SCF determines that according to the user service information (if withdrawing from the positional information of this channel last time) and/or the local policy of storage the media delivery passage adopts multicast or mode of unicast.
As sending the delivery method that current live content then adopts the multicast Media Stream to the user, SCF sends conversation initial response message (being execution in step 606) to IMS Core, message comprises the media description of multicast Media Stream, follow-uply set up process and existing LTV business to set up process consistent, present embodiment no longer is repeated in this description.
Send over the content of certain time to the user if desired and then can adopt the delivery method of unicast media stream.SCF sends the conversation initial request to the TsTV MF that the time-moving television media resource is provided, and message does not comprise media description information, execution in step 605.
605, return the conversation initialization response;
TsTV MF sends conversation initial response message, the media description of message content control channel and content delivery channel (SDP Offer1) to SCF.
606, return the conversation initialization response;
SCF is according to the conversation initial response message structure conversation initial response message of TsTV MF, and the media description of message content control channel and content delivery channel (SDP offer2) sends this conversation initial response message then to IMS Core.
607, transmit the conversation initialization response;
IMS Core gives SCF according to the routing rule of 3GPP IMS specification description with session initial communication message forward pass.
608,609 or 608,609,610: return the conversation initialization response:
When in the flow process of front during execution in step 605, need execution in step 610 herein;
Terminal sends the conversation initial acknowledge message through IMS Core to SCF, the medium Answer information (SDP Answer2) of message content control channel and content delivery channel, SCF gives TsTV MF with this message forward pass, comprises medium Answer information (SDP Answer1) in the message.
611A, 612A: if need the multicast Media Stream, then add the multicast group, send the multicast Media Stream to terminal by the basic controlling entity;
611B～613B: if need unicast media stream, then set up the content control passage, and initiate playing request to TsTV MF, TsTV MF sends Media Stream to terminal after returning and playing response.
Present embodiment at be the implementation of TsTV business in the time shift channel mode, so further improved the flexibility of TsTV service establishing method in the embodiment of the invention.
Introduce the device embodiment in the embodiment of the invention below, see also Fig. 7, time-moving television media function entity first embodiment comprises in the embodiment of the invention:
Request message receiving element 701 is used for the content delivery channel information of receiving terminal transmission and the request message of media control channel information;
Passage is set up control unit 702, be used for according to the content control channel information set up with terminal between transmission be connected;
Request receiving element 703 is used for connecting the media play request that receiving terminal sends by transmission;
Media information returns unit 704, is used for sending to terminal by the content delivery channel of content delivery channel information correspondence the media information of described media play request correspondence.
See also Fig. 8, time-moving television media function entity second embodiment comprises in the embodiment of the invention:
Receiving element 801 is used for the request message of the content control channel information that receiving terminal sends;
Passage is set up control unit 802, be used for according to the content control channel information set up with terminal between transmission be connected;
Request receiving element 804 is used for the media play request that receiving terminal sends;
Media information returns unit 805, is used for sending to terminal by the content delivery channel of content delivery channel information correspondence the media information of media play request correspondence.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises the steps: the content delivery channel information of time-moving television media function entity receiving terminal initiation and the media negotiation of content control channel information when carrying out; According to described media negotiation result set up with described terminal between transmission be connected; Connect the media play request that receiving terminal sends by described transmission; Send the media information of described media play request correspondence to terminal by the content delivery channel of setting up according to described content delivery channel information.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
Because in the embodiment of the invention, the content delivery channel information that time-moving television media function entity receiving terminal sends and the request message of content control channel information, so time-moving television media function entity can be according to the content control passage that is used for control channel between content control channel information foundation that receives and the terminal, can be according to being used for the content delivery channel of transmitting realtime stream medium between foundation of content delivery channel information and the terminal, so can in the IMS system, realize time shifted TV business.
More than a kind of time shifted TV business method for building up provided by the present invention and time-moving television media function entity are described in detail, for one of ordinary skill in the art, thought according to the embodiment of the invention, part in specific embodiments and applications all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1. a time shifted TV business method for building up is characterized in that, comprising:
The content delivery channel information that time-moving television media function entity receiving terminal is initiated and the media negotiation of content control channel information;
According to described media negotiation result set up with described terminal between transmission be connected;
Connect the media play request that receiving terminal sends by described transmission;
Send the media information of described media play request correspondence to terminal by the content delivery channel of setting up according to the content delivery channel information behind the media negotiation.
2. time shifted TV business method for building up according to claim 1 is characterized in that, comprises before the step of the content delivery channel information that described time-moving television media function entity receiving terminal is initiated and the media negotiation of content control channel information:
The user initiates to suspend request in the process of using live television service;
The current play position information of terminal recording medium.
3. time shifted TV business method for building up according to claim 2 is characterized in that, the step of the content delivery channel information that described time-moving television media function entity receiving terminal is initiated and the media negotiation of content control channel information comprises:
When the user initiated to continue playing request, terminal sent the session change request message of content delivery channel information and content control channel information to business control function body;
Described business control function body judges according to service identification in the described session change request message or content control channel information whether the business of user's request is time shifted TV business, if then send the conversation initialization request message of content delivery channel information and content control channel information to time-moving television media function entity.
4. according to each described time shifted TV business method for building up in the claim 1 to 3, it is characterized in that, described according to the media negotiation object information set up and described terminal between the transmission step of connecting comprise:
According to the media negotiation result, the transmission of setting up the real-time stream protocol of carrying between terminal and the time-moving television media function entity is connected.
5. time shifted TV business method for building up according to claim 4 is characterized in that, the described step that connects the media play request that receiving terminal sends by described transmission comprises:
Terminal connects to the transmission of time-moving television media function entity by described transmission and comprises message session sign, the playing request message of medium position information.
6. a time shifted TV business method for building up is characterized in that, comprising:
The operation information that the business control function body receiving terminal reports;
Send the conversation initialization request message to time-moving television media function entity;
Time-moving television media function entity is initiated the media negotiation request of content control channel information and content delivery channel information;
According to described media negotiation result set up with described terminal between transmission be connected;
Connect the media play request that receiving terminal sends by described transmission;
Send the media information of described media play request correspondence to terminal by the content delivery channel of setting up according to the content delivery channel information behind the media negotiation.
7. time shifted TV business method for building up according to claim 6 is characterized in that, described operation information is a button operation information, or the Play Control operation information.
8. time shifted TV business method for building up according to claim 7 is characterized in that, described step to time-moving television media function entity transmission conversation initialization request message comprises before:
Business control function body judges whether the operation information that receives is the time shifted TV business operation information, if then carry out the step that sends the conversation initialization request message to time-moving television media function entity.
9. a time-moving television media function entity is characterized in that, comprising:
The request message receiving element is used for the content delivery channel information of receiving terminal transmission and the request message of content control channel information;
Passage is set up control unit, be used for according to described content control channel information set up with described terminal between transmission be connected;
The request receiving element is used for connecting the media play request that receiving terminal sends by described transmission;
Media information returns the unit, is used for sending to terminal by the content delivery channel of the content delivery channel information correspondence behind the media negotiation media information of described media play request correspondence.
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| CN2008101896213A CN101459824B (en) | 2007-07-04 | 2007-07-04 | Time shifted television service establishing method and time shifted television media functional entity |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889677A (en) * | 2006-06-02 | 2007-01-03 | Ut斯达康通讯有限公司 | Status control system and method for supporting time shifted TV business |
| CN1972441A (en) * | 2006-12-14 | 2007-05-30 | 中兴通讯股份有限公司 | Method of stream media storage and service |
| CN101340557A (en) * | 2007-07-04 | 2009-01-07 | 华为技术有限公司 | Time shifted television establishing method and time shifted television media functional entity |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889677A (en) * | 2006-06-02 | 2007-01-03 | Ut斯达康通讯有限公司 | Status control system and method for supporting time shifted TV business |
| CN1972441A (en) * | 2006-12-14 | 2007-05-30 | 中兴通讯股份有限公司 | Method of stream media storage and service |
| CN101340557A (en) * | 2007-07-04 | 2009-01-07 | 华为技术有限公司 | Time shifted television establishing method and time shifted television media functional entity |
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