CN101883443B - Method and device for realizing SIP session transfer - Google Patents
Method and device for realizing SIP session transfer Download PDFInfo
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- CN101883443B CN101883443B CN 200910137699 CN200910137699A CN101883443B CN 101883443 B CN101883443 B CN 101883443B CN 200910137699 CN200910137699 CN 200910137699 CN 200910137699 A CN200910137699 A CN 200910137699A CN 101883443 B CN101883443 B CN 101883443B
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Abstract
The invention discloses a method and a device for realizing SIP session transfer. The method comprises the following steps: media information required to be transferred is obtained by a session transfer sender; and a session transfer request is started, and the media information required to be transferred is carried in the session transfer request so that a session transfer receiver establishes a transfer service according to the media information required to be transferred. By using the invention, the transfer of all or part of the media streams is performed according to wish of the client, thereby meeting the requirements in various occasions and enriching IPTV experience of the client.
Description
Technical field
The present invention relates to mobile communication technology, be specifically related to a kind of method and apparatus of the SIP of realization Session Hand-off.
Background technology
IPTV (Internet Protocol Television, TV broadcasting service based on the IP agreement) is a kind of broadband cabled television network that utilizes, integrate the multiple technologies such as the Internet, multimedia, communication, the brand-new technology of the multiple interactive services that comprises Digital Television is provided to the domestic consumer.The user can use PC or network machine top box+general television set mode to enjoy the IPTV business at home, also can enjoy the IPTV business by portable terminal.IPTV uses TCP/IP (Transmission Control Protocol/Internet Protocol, transmission control protocol/internet protocol) carries out clean culture, broadcasting or group broadcasting video frequency business as bearing protocol, effectively television network, three fields of telephone network and the Internet are combined, be the most representative business of the integration of three networks, just be subject to industry and more and more paying close attention to.
At present, in each large IPTV standard, all can't realize the transfer service of conversation media stream.
Summary of the invention
The embodiment of the invention provides a kind of method and apparatus of the SIP of realization Session Hand-off, to realize the transfer of SIP session medium stream.
The embodiment of the invention provides a kind of method of the SIP of realization Session Hand-off, comprising:
The Session Hand-off transmit leg obtains the media information that needs transfer;
The initiation session transfer request is carried the media information that needs transfer in the described session transfer request, so that the Session Hand-off recipient sets up transfer service according to the media information that described needs shift.
The embodiment of the invention provides a kind of method of the SIP of realization Session Hand-off, comprising:
The Session Hand-off recipient receives session transfer request, carries the media information that needs transfer in the described session transfer request;
According to the information of carrying in the described session transfer request, obtain to set up the required information of transfer service;
Utilize the required information of transfer service of setting up that obtains to set up transfer service.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The media information acquiring unit is used for obtaining the media information that needs transfer;
Information transmitting unit is used for the initiation session transfer request, carries the media information that needs transfer in the described session transfer request.
The embodiment of the invention provides a kind of subscriber equipment, comprising:
The request receiving unit is used for receiving session transfer request, carries the media information that needs transfer in the described session transfer request;
The business information acquiring unit for the information of carrying according to described session transfer request, obtains to set up the required information of transfer service;
Business is set up the unit, is used for utilizing the required information of transfer service of setting up that obtains to set up transfer service.
The embodiment of the invention provides a kind of operation controlling entity, comprising: receiving element, granted unit;
Described receiving element is used for receiving the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request;
Described granted unit is used for determining whether described Session Hand-off transmit leg has the Session Hand-off authority;
Described operation controlling entity also comprises:
The session establishment unit is used for after described granted unit determines that transmit leg has the Session Hand-off authority, sets up process according to the media information active initiation session that described needs shift; Perhaps,
Transmitting element is used for after described granted unit determines that transmit leg has the Session Hand-off authority, and the recipient sends session transfer request to Session Hand-off, carries the media information that needs transfer in the described session transfer request.
The method and apparatus of the realization SIP Session Hand-off that the embodiment of the invention provides, when the Session Hand-off transmit leg carries out Session Hand-off at needs, send session transfer request, and carry the media information that needs transfer in described session transfer request, so that the Session Hand-off recipient sets up transfer service according to the media information that described needs shift.Like this, for the Session Hand-off recipient, after receiving session transfer request, according to the information of carrying in the described session transfer request, obtain to set up the required information of transfer service, then utilize the required information of transfer service of setting up that obtains to set up transfer service.Thereby can realize carrying out according to user intention the transfer of all or part of Media Stream, thereby can satisfy various scene demands that the IPTV that enriches the user experiences.
Description of drawings
Fig. 1 is the flow chart that the present invention realizes method first embodiment of SIP Session Hand-off;
Fig. 2 is the flow chart that the present invention realizes method second embodiment of SIP Session Hand-off;
Fig. 3 is a kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off;
Fig. 4 is the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off;
Fig. 5 is the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off;
Fig. 6 is the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off;
Fig. 7 is a kind of structural representation of embodiment of the invention subscriber equipment;
Fig. 8 is the another kind of structural representation of embodiment of the invention subscriber equipment;
Fig. 9 is a kind of structural representation of embodiment of the invention operation controlling entity;
Figure 10 is the another kind of structural representation of embodiment of the invention operation controlling entity.
Embodiment
In order to make those skilled in the art person understand better the scheme of the embodiment of the invention, below in conjunction with drawings and embodiments the embodiment of the invention is described in further detail.
The embodiment of the invention realizes the method for SIP Session Hand-off, the Session Hand-off transmit leg obtains the media information that needs transfer, the initiation session transfer request, carry the media information that needs transfer in the described session transfer request, so that the Session Hand-off recipient sets up transfer service according to the media information that described needs shift.Like this, for the Session Hand-off recipient, after receiving session transfer request, according to the information of carrying in the described session transfer request, obtain to set up the required information of transfer service, then utilize the required information of transfer service of setting up that obtains to set up transfer service.Particularly, the session transfer request that the Session Hand-off recipient receives can receive from the Session Hand-off transmit leg, also can be to send after receiving the session transfer request that the Session Hand-off transmit leg sends by operation controlling entity.Correspondingly, need the process of setting up of the session of transfer to be initiated by the Session Hand-off recipient, also can be initiated by operation controlling entity.
Because IMS (IP Multimedia Subsystem, IP Multimedia System) is the subsystem of the support IP multimedia service that in Release 5 versions, proposes of 3GPP (3rdGeneration Partnership Project, 3rd Generation Partnership Project).IMS is an IP-based standards system that is independent of access technology, and it and existing voice and data network can intercommunications.No matter be fixed network users, PSTN (Public Switched Telephone Network for example, PSTN), ISDN (Integrated Services Digital Network, integrated services digital network), internet, or mobile subscriber, for example GSM (Global System for Mobile Communications, global system for mobile communications), CDMA (Code Division Multiple Access, code division multiple access).The system of IMS be so that can set up the IP communication of equity by various types of clients, and can obtain needed service quality.Except session management, the IMS system also relates to completion service provides necessary function, such as registration, safety, charging, Bearer Control, roaming etc.Therefore, the below take based on the IPTV of IMS system as example, the embodiment of the invention is elaborated.Certainly, the method for embodiment of the invention realization SIP Session Hand-off is not limited in and is applied to this network environment.
The below realizes that to the embodiment of the invention method of Session Hand-off is elaborated from UE (User Equipment, subscriber equipment) side and network side respectively.
With reference to Fig. 1, be the flow chart that the present invention realizes method first embodiment of SIP Session Hand-off, may further comprise the steps:
Step 101, Session Hand-off transmit leg are obtained the media information that needs transfer.
Step 102, the initiation session transfer request is carried the media information that needs transfer in the described session transfer request, so that the Session Hand-off recipient sets up transfer service according to the media information that described needs shift.
Described session transfer request can be sip message, such as being message (notice) message, refer (submission) message among the SIP etc.Certainly, also can realize by newly-increased sip message.
Go back the following any one or more parameter of portability in the described session transfer request:
ST (Session Transfer, Session Hand-off) message indication is because if adopt SIP (SessionInitiation Protocal, Session initiation Protocol) message, then need to make a distinction with other sip message, can indicate to indicate by this ST message.
STI (Session Transfer Identifier, Session Hand-off sign) is used for the session that sign needs transfer.
The Session Hand-off recipient.
Branch mode indication comprises and copies or substitute, and is used for showing the session that whether continues behind the Session Hand-off to keep with the Session Hand-off transmit leg, if copy, then need to continue to keep the session with the Session Hand-off transmit leg behind the Session Hand-off, if substitute, then do not need.
The Session Hand-off indication, namely part shifts or all shifts indication, is used for showing whole business is shifted or certain Media Stream is shifted.
The media information that needs transfer by SDP (Session Description Protocol, Session Description Protocol) expression, if all shift, and has had the indication of whole transfers, and this parameter can be set.If part shifts, then need to show the media information that the user need to shift with this parameter.
Content identification and side-play amount, content identification and the side-play amount of the ongoing business of expression user.
Need to prove, in concrete the application, be to substitute if need the branch mode of the session of transfer, and after then Session Hand-off was finished, the Session Hand-off transmit leg also needed to remove corresponding session.Particularly, can remove session according to the notice of operation controlling entity; Perhaps the Session Hand-off transmit leg is initiatively removed session.
As seen, the embodiment of the invention realizes the method for SIP Session Hand-off, Session Hand-off transmit leg initiation session transfer request, in described session transfer request, carry the media information that needs transfer, thereby for Session Hand-off provides necessary information, like this, no matter needing the process of setting up of the session of transfer is to be initiated by the Session Hand-off recipient, or by SCF (Session Control Function, operation controlling entity) initiates, can set up corresponding session according to the media information of wherein needs transfer.And, not only can realize whole transfers of Media Stream, and can realize that the part of Media Stream shifts.
Need to prove after the Session Hand-off success, if the user wishes that the media information that will transfer to the Session Hand-off recipient is transferred back to the Session Hand-off transmit leg, following two kinds of methods can be arranged:
A kind of is that the Session Hand-off transmit leg is directly initiated SIP Re-invite (heavily inviting) message, request obtains corresponding media information, SCF is to MCF (Media Control Function, medium controlling entity) initiates Re-invite, MCF sends RTSP Play (broadcast) message to MDF (Media Delivery Function, the distribution of media entity), ask corresponding media information.Can according to circumstances, determine whether keeping or deleting Session Hand-off recipient's corresponding session or business.
Another kind is that the Session Hand-off recipient asks SCF that corresponding media information is transferred back to the Session Hand-off transmit leg, carry STI in the request and represent the m of this media information capable, shift transmit leg by the SCF announcement session and carry out session modification, perhaps SCF directly initiates SIP Reinvite initiation session modification process, makes the Session Hand-off transmit leg regain corresponding media information.
With reference to Fig. 2, be the flow chart that the present invention realizes method second embodiment of SIP Session Hand-off, may further comprise the steps:
Particularly, described session transfer request can be directly to come from the Session Hand-off transmit leg, also can be by SCF in the session transfer request of receiving that the Session Hand-off transmit leg sends, and confirm that the Session Hand-off transmit leg has and send after the Session Hand-off authority.
In the session transfer request that the Session Hand-off transmit leg sends, can also carry some other information, be described in detail in front.
The information of carrying in the session transfer request that SCF sends can comprise following one or more parameter: the indication of ST message, STI, Session Hand-off transmit leg, Session Hand-off are indicated, are partly shifted or all shift and indicate, Media Stream, content identification and the side-play amount of needs transfer.
According to using needs, the media information that the needs that carry in the session transfer request that SCF sends shift, the media information that shifts from the needs that carry in the session transfer request that the Session Hand-off transmit leg sends can have part different, that is to say, after SCF receives the session transfer request of Session Hand-off transmit leg transmission, the actual characteristic of the media information that can shift is as required made amendment to the SDP in this session transfer request, describes in detail in the time of specifically will giving an example in the back.
Step 202 according to the information of carrying in the described session transfer request, obtains to set up the required information of transfer service.
Particularly, the Session Hand-off recipient can directly obtain the described professional required information of setting up from described session transfer request; Can also obtain the described professional required information of setting up from other entities according to the information of carrying in the described session transfer request, specifically will describe in detail in the back.
Step 203 utilizes the required information of transfer service of setting up that obtains to set up transfer service.
Mention in above-mentioned steps 202, the Session Hand-off recipient can be according to the information of carrying in the described session transfer request, obtains the described professional required information of setting up from other entities, need mainly to refer to the side-play amount of the business that shifts.The source of the session transfer request that receives according to the Session Hand-off recipient is different, and following two kinds of situations can be arranged:
1. the session transfer request that receives of described Session Hand-off recipient comes from the Session Hand-off transmit leg, then describedly obtains the required information of described foundations business from other entities and comprises:
After the Session Hand-off recipient receives described session transfer request, send the session establishment request to SCF, carry STI in the described session establishment request;
Receive the response message that SCF returns, carry SCF in the described response message according to the side-play amount of described STI from the business of the needs transfer of MCF acquisition;
Acquisition needs the side-play amount of the business of transfer from described response message.
2. the session transfer request that receives of described Session Hand-off recipient is sent by SCF, then describedly obtains the required information of described foundations business from other entities and comprises:
The Session Hand-off recipient receives the session establishment request that SCF sends, and carries the described side-play amount that needs the business of transfer that SCF obtains from MCF in the described session establishment request; From described session establishment request, obtain the described professional required information of setting up.
In embodiments of the present invention, also can further may further comprise the steps:
SCF receives the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request;
Determine whether described Session Hand-off transmit leg has the Session Hand-off authority;
If transmit leg has the Session Hand-off authority, then set up process according to the active of the information in described session transfer request initiation session; Perhaps send session transfer request to the Session Hand-off recipient, carry the media information that needs transfer in the described session transfer request.
Wherein, SCF sets up process according to the information initiation session in the described session transfer request and comprises:
SCF sets up process to the MCF initiation session, obtains the side-play amount of RTSP (Real Time Streaming Protocol, real time streaming transport protocol) gap marker and the business that needs to shift;
Described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient, initiation and Session Hand-off recipient's session.
In embodiments of the present invention, also can further may further comprise the steps:
After SCF receives the session transfer request of Session Hand-off transmit leg transmission, the media information that the needs that carry in the described session transfer request shift is made amendment, and the amended media information that needs to shift is carried in the session establishment request that sends to the Session Hand-off recipient.
SCF receives the session establishment request that the Session Hand-off recipient initiates, and carries the Session Hand-off sign in the described session establishment request;
Determine whether described Session Hand-off recipient has the authority that receives Session Hand-off;
If described Session Hand-off recipient has the authority that receives Session Hand-off, then obtain the side-play amount of the business of RTSP gap marker and needs transfer from MCF according to described Session Hand-off sign;
Described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient.
As seen, the method for the Session Hand-off of the embodiment of the invention, the Session Hand-off recipient receives the session transfer request that carries the media information that needs transfer, sets up corresponding session according to the media information of wherein needs transfer.And, not only can realize whole transfers of Media Stream, and can realize that the part of Media Stream shifts.
Below in conjunction with concrete network entity the embodiment of the invention under the difference transfer demand is realized that the process of Session Hand-off is described in detail.
In the following embodiments, suppose that UE1 and UE2 belong to same contracted user, and the Session Hand-off of having contracted is professional, the user watches CoD (Content On Demand by UE1, content-on-demand) business, and in the process of watching, finish Session Hand-off, finish Session Hand-off when perhaps signatory between UE1 and the UE2 meets requiring of Session Hand-off business.
With reference to Fig. 3, be a kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off.
In this embodiment, the session that UE1 carries out all need to be copied on the UE2, and set up process by UE2 active initiation session.Mainly may further comprise the steps:
301. the user selects to carry out session service by UE1, specifically can be to realize by number and selection Session Hand-off business at UE1 input UE2.
302.UE1 initiation session transfer request, described session transfer request specifically can be sip messages, such as being existing message message, refer message etc. among the SIP.Certainly, also can realize by newly-increased sip message.
The parameter that wherein needs to carry comprises: the indication of ST message, STI, UE2, copy or substitute indication, part shifts or all shift media information, content identification and the side-play amount of indication, needs transfer.
Wherein need the media information that shifts, can represent by in existing sip message, increasing a new message header: ST-media Transferred:Audio
Also can use when setting up session the serial number of the Media Stream of reaching with regard to the Offer/Answer model between UE1 and the SCF.
In addition, also can in the message body of session transfer request, add the XML of presentation medium.
303.SCF after receiving session transfer request, UE1 is carried out the Session Hand-off mandate, judges whether UE1 has corresponding authority.
If 304. UE1 has corresponding authority, then SCF initiation sip message notice UE2 need to carry out Session Hand-off, the parameter of carrying in described sip message comprises: the indication of ST message, STI, UE1, SDP, content identification and side-play amount.Wherein:
Described SDP is used for to UE2 notice UE1 about this professional related media information.
If all shift, and do not carry the media relevant information in the session transfer request of step 301, SCF can be by obtaining about this professional media relevant information with MCF alternately.
If part shifts or all shifts, and carried the media relevant information in the session transfer request of step 301, SCF can make amendment to these information, specifically can be by obtaining alternately about this professional media relevant information with MCF.
Such as, the user wishes the audio frequency of UE1 is transferred to UE2, and indicates by increasing delegation among the SDP in the sip message of issuing SCF at UE1:
m＝audio?4011?RTP/AVP?96
/ * UE1 only support payload type 96 correspond to G.726 coding */
After SCF received this session transfer request, by obtaining alternately the coding that this program is supported 98 (MPV) 99 (H.261) simultaneously with MCF, then SCF can be revised as this m is capable:
m＝audio?4011?RTP/AVP?96?97?98。
Described content identification and side-play amount are used to indicate content identification and the side-play amount of the CoD program that the user watching on UE1.If carried the side-play amount that UE1 arranges in the session transfer request of step 301, then SCF can directly carry this side-play amount.Perhaps, SCF can by mutual with MCF or MDF, obtain the user watches this CoD business tine by UE1 side-play amount.
Need to prove, may there be the regular hour poor between the side-play amount of carrying in the sip message that the side-play amount that UE1 arranges and SCF send to UE2, can ignore this time difference at this, think that it can not affect the continuity of customer service, namely think this two place side-play amount for all be professional to transfer to immediately scene on the UE2 from UE1.
305.UE2 after receiving this sip message, return response message 200 OK to SCF.
306.SCF after receiving the response message that returns, return response message 200 OK to UE1.
307.UE2 send Invite (invitation) message, the session establishment process between initiation and the SCF is carried STI in described Invite message, to show that the session that needs are set up is the session that obtains by Session Hand-off.
308.SCF after receiving Invite message, judge the business of this request for requiring through Session Hand-off to set up according to the STI that wherein carries.SCF authorizes UE2, confirms that UE2 has the authority of watching the Session Hand-off business.
At this moment, SCF can obtain from MCF the side-play amount of the ongoing business of UE1, may exist certain hour poor between the side-play amount of carrying in the sip message that SCP initiates in the side-play amount that obtain this moment and the step 304.
309.SCF serve as B2BUA (Back-to-Back User Agent, back-to-back user agent), initiation session is set up message Invite to MCF.
310.MCF after receiving Invite message, initiate RTSP to MDF and set up request, the RTSP passage between foundation and the MDF.
311.MDF after receiving that RTSP sets up request, return 200 OK message to MCF, wherein carry the RTSP passage ID (RTSP sign) of the RTSP passage of foundation.
312.MCF after receiving 200 OK message, return 200 OK message to SCF, wherein carry the RTSP passage ID that MDF returns.
313.SCF RTSP passage ID (if side-play amount obtains when the step 308, at this moment should return) is returned to UE2 in 200 OK.
SCF can notify the UE1 Session Hand-off professional success at this moment.
314.UE2 initiate RTSP broadcast message according to RTSP passage ID and side-play amount to MDF.
315.MDF after receiving that described RTSP plays message, return 200 OK message to UE2.
Then, the user just can watch this CoD program by UE2.
As seen, in embodiments of the present invention, the media information that the needs that SCF sends UE1 shift sends to UE2, by UE2 initiatively initiation session set up process, the service duplication that needs among the UE1 to shift to UE2, has been realized Session Hand-off.
With reference to Fig. 4, be the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off.
In this embodiment, the session replacing whole that UE1 need to be carried out and is set up process by the SCF initiation session to UE2.Mainly may further comprise the steps:
401. the user selects to carry out the Session Hand-off business by UE1, can be by at the number of UE1 input UE2 and select the Session Hand-off business realizing, can be selected to be all or part of transfer and to be to substitute or the transfer of copy mode by the user simultaneously.
402.UE1 the initiation session transfer request can be passed through sip message.It can be message message, refer message, also can realize by newly-increased sip message.In embodiments of the present invention, use message message, the parameter that wherein needs to carry comprises: the indication of ST message, STI, UE2, copy or substitute indication, part shifts or all shifts indication, SDP, content identification and side-play amount.
403.SCF after receiving session transfer request, UE1 is carried out the Session Hand-off mandate, judges whether UE1 has corresponding authority.
If 404. UE1 has corresponding authority, then SCF returns 200 OK message to UE1.
405.SCF initiate Invite message to MCF.
Set up message 406.MCF initiate RTSP, the RTSP passage between foundation and the MDF.
407.MDF the RTSP passage ID that establishes is issued MCF in 200 OK.
408.MCF RTSP passage ID is returned to SCF in 200 OK.At this moment, MCF can obtain side-play amount simultaneously, and returns to SCF.
409.SCF send Invite message to UE2, RTSP passage ID and described side-play amount are carried in the session of initiation and UE2 in the described Invite message.
410.UE2 send 200 OK message to SCF, show session establishment.
Above-mentioned steps 405 to 410 is set up professional process for the third party controls.SCF serves as the third party, related two SIP sessions.
411.SCF send ACK message to UE2.
412.UE2 initiate RTSP broadcast message according to the RTSP passage ID that carries in the Invite message of receiving in the step 409 and side-play amount.
413. the user watches CoD professional by UE2.
414.SCF professional the transfer successfully of notice UE1 Session Hand-off.
Need to prove, above-mentioned steps 412,413 and step 414,415 between there is no strict sequential relationship.
416. because the UE1 initiation is the Session Hand-off of alternative, it is professional therefore to need to disconnect CoD, particularly, UE1 passes through to send RTSP Tear Down (RTSP dismounting) message, disconnects RTSP and connects.
417.MDF return successfully response message to UE1, disconnection is connected with the RTSP of UE1.
418.UE1 initiate SIP Bye message to SCF.
419.SCF after receiving SIP Bye message, with the session association between itself and the MCF, initiate SIP BYE message to MCF.
420.MCF return 200 OK message to SCF.
Above-mentioned steps 416 to step 421 is by SCF notice UE1, and by the process of UE1 initiation dismounting session, this process also can be initiated by SCF.Detailed process will describe in detail in the back.
As seen, in embodiments of the present invention, after SCF receives the media information of the needs transfer that UE1 sends, the media information that needs are shifted sends to UE2, set up process by UE2 active initiation session, the business that needs among the UE1 to shift is substituted into UE2, realized Session Hand-off.What UE1 initiated is the Session Hand-off of alternative, and therefore, after Session Hand-off was finished, SCF notified UE1, by UE1 initiation session demolishing process.
With reference to Fig. 5, be the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes the SIP Session Hand-off.
In this embodiment, step 501 is similar to step 413 to the step 401 among step 513 and Fig. 4.
Because what UE1 initiated is the Session Hand-off of alternative, it is professional therefore to need to disconnect CoD, particularly:
514.SCF send SIP BYE message, initiation session demolishing process to UE1.
515.UE1 after receiving SIP BYE message, send RTSP Tear Down (RTSP dismounting) message to MDF, disconnect RTSP and connect.
516.MDF return successfully response message to UE1.
Be connected with the RTSP of UE1 517.MDF disconnect.
518.UE1 return 200 OK message to SCF.
519.SCF send SIP BYE message to MCF.
520.MCF return 200 OK message to SCF.
As seen, in embodiments of the present invention, after SCF receives the media information of the needs transfer that UE1 sends, the media information that needs are shifted sends to UE2, set up process by UE2 active initiation session, the business that needs among the UE1 to shift is substituted into UE2, realized Session Hand-off.What UE1 initiated is the Session Hand-off of alternative, and therefore, after Session Hand-off was finished, SCF was by SIP BYE message, initiation session demolishing process.
With reference to Fig. 6, be the another kind of message flow chart of method in concrete application that the embodiment of the invention realizes Session Hand-off.
In this embodiment, the session section that UE1 carries out need to be substituted on the UE2, and set up process by the SCF initiation session.Mainly may further comprise the steps:
601. the user selects to carry out the Session Hand-off business by UE1, specifically can be by number and selection Session Hand-off business realizing at UE1 input UE2, the user wishes in the UE1 input which Media Stream is transferred on the UE2, and no longer receives these Media Streams at UE1.
602.UE1 to SCF initiation session transfer request, described session transfer request can be sip message, and the parameter that wherein needs to carry comprises: the indication of ST message, STI, UE2, copy or substitute indication, part shifts or all shifts indication, SDP, content identification and side-play amount.
In the present embodiment, above-mentioned part transfer or whole the transfer are designated as the part transfer; Carry m=audio and corresponding a capable (such as m=audio 4011 RTP/AVP 96) among the described SDP, show and wish this Media Stream is transferred to UE2.
603.SCF after receiving described session transfer request, UE1 is carried out the Session Hand-off mandate, judges whether UE1 has corresponding authority.
If 604. UE1 has corresponding authority, then SCF initiation sip message notice UE2 need to carry out Session Hand-off, the parameter that wherein needs to carry comprises: the indication of ST message, STI, UE1, SDP, part shift or all shift indication, content identification and side-play amount.
Need to prove that if carried the media relevant information in above-mentioned steps 601, then SCF can make amendment to these information, specifically can be by obtaining alternately about this professional media relevant information with MCF.Such as, SCF is as follows to the modification process of these information:
Suppose that the user wishes the audio frequency of UE1 is transferred to UE2, in UE1 issues SDP in the session transfer request of SCF, increase following content:
m＝audio?4011?RTP/AVP?96
/ * UE1 only support payload type 96 correspond to G.726 coding */
SCF after receiving this session transfer request, through and the mutual acquisition of the MCF program that need to shift support simultaneously the coding of 98 (MPV), 99 (H.261), then SCF is revised as this m is capable:
m＝audio?4011?RTP/AVP?96?97?98
In addition, if UE1 issues and carried the side-play amount that UE1 arranges in the session transfer request of SCF in above-mentioned steps 601, SCF can directly carry this side-play amount in the sip message of initiating so.Perhaps, SCF can by mutual with MCF/MDF, obtain the user watches this program request business tine by UE1 side-play amount.Need to prove, the side-play amount that this two place obtains, i.e. the side-play amount that arranges of UE1 and the SCF side-play amount of in the sip message that sends to UE2, carrying, between may exist the regular hour poor, this time difference can be ignored, think that it can not affect the customer service continuity.
605.UE2 after receiving this request, return response message 200 OK to SCF.
607.UE2 send Invite message, session establishment process between initiation and the SCF, carry STI in the described Invite message, show that this is the session that once obtains by Session Hand-off, and wherein carry the media content that the current session of m line display need to be set up: m=audio 4011 RTP/AVP 96 97.
608.SCF after receiving Invite message, judge the business of this request for requiring through Session Hand-off to set up according to the STI that wherein carries.SCF authorizes UE2, confirms that UE2 has the authority of watching this Session Hand-off business.
SCF can obtain the side-play amount of the ongoing business of UE1 at this moment from MCF, may there be the larger time difference in the side-play amount of carrying in the sip message that SCF initiates in the side-play amount that obtain this moment and the above-mentioned steps 605.
609.SCF serve as B2BUA, initiation session is set up message Invite to MCF.
610.MCF after receiving Invite message, initiate RTSP and set up message, the RTSP passage between foundation and the MDF.
612.MCF return 200 OK message to SCF, wherein carried the RTSP passage ID that MDF returns.
613.SCF after receiving the response message that MCF returns, RTSP passage ID (if side-play amount obtains, at this moment should return) is returned to UE2 by 200 OK message in step 608.
At this moment, SCF can notify the UE1 Session Hand-off professional success.
614.UE2 initiate RTSP broadcast message according to RTSP passage ID and described side-play amount to MDF.
616. this moment, UE2 receives the audio stream from MDF, namely transfers to the Media Stream of UE2 from UE1, in order to distinguish with other Media Streams, is referred to as Media Stream 1.
617.SCF this time Session Hand-off success of notice UE1.
618.UE1 return 200 OK message to SCF.
619. if UE1 does not wish to continue to support (reception) audio stream, then UE1 initiates SIP Re-Invite (heavily inviting) message, SDP in this message is about the m behavior of audio stream: m=audio 0 RTP/AVP96 shows that UE1 does not wish to continue to support (reception) audio stream.
620.SCF after receiving the initiation SIP Re-Invite of UE1 initiation, initiate SIP Re-Invite message to MCF.
621.MCF after receiving SIP Re-Invite message, initiate RTSP and play message to MDF, wherein carry following information:
PLAY?rtsp://SessionTransfer.com/SessionTransfer1
Require:3gpp-switch
Session:xxxx
Switch-Stream:old＝rtsp://SessionTransfer.com/SessionTransfer1/streamID＝1，
old＝rtsp://SessionTransfer.com/SessionTransfer1/streamID＝2；
new＝rtsp://SessionTransfer.com/SessionTransfer1/streamID＝2，
old＝rtsp://SessionTransfer.com/SessionTransfer1/streamID＝3；
new＝rtsp://SessionTransfer.com/SessionTransfer1/streamID＝3，
This shows that MCF wishes Media Stream 1 deletion.
623.MCF return 200 OK message to SCF.
After this, the user is by other Media Streams outside the UE1 receiving media stream 1, such as video flowing (Media Stream 2) and the captions (Media Stream 3) of demand (telecommunication) service.
As seen, in embodiments of the present invention, after SCF receives the media information of the needs transfer that UE1 sends, the media information that needs are shifted sends to UE2, set up process by UE2 active initiation session, the business that needs among the UE1 to shift is substituted into UE2, realized the transfer of session.Because what UE1 initiated is the Session Hand-off of part alternative, therefore, after Session Hand-off was finished, UE1 sent SIP Re-Invite message, received the Media Stream that does not shift from MDF.
Need to prove, in above-mentioned Fig. 4 is extremely embodiment illustrated in fig. 7, SCF and other entities, such as UE1, UE2, MCF's is mutual by IMS Core (IP Multimedia Subsystem Core, the IP Multimedia System kernel entity), such as CSCF (Call Session Control Function, CCF) comprises P-CSCF (Proxy CSCF), S-CSCF (Serving CSCF), the IMS entities such as I-CSCF (Interrogating CSCF) carry out the forwarding of message, clear in order to illustrate, not shown relevant entity in Fig. 2.
In addition, in above-mentioned each figure, also omitted the response message Ack of corresponding Invite (invitation) message.
In addition, need to prove, in the various embodiments described above, SCF can obtain on different opportunitys the side-play amounts of the business that need to shift, and the side-play amount that obtain different opportunitys may exist the regular hour poor, when concrete the application, can be according to different business needs, the opportunity of selecting SCF to obtain side-play amount is to adapt to different business demands.
In the various embodiments described above, describe UE1 and sent session transfer request to SCF, then set up the process of corresponding session by SCF or UE2 according to the media information that the needs that carry in the described session transfer request shift.Need to prove that UE1 also can directly send session transfer request to UE2, and carry the media information that needs transfer in described session transfer request, UE2 sets up corresponding session according to the media information that described needs shift.Wherein, if need part to shift, then need the side-play amount of the business that shifts to carry in session transfer request, also can be obtained from other entities by UE2, detailed process is similar to the above, is not described in detail at this.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method is to come the relevant hardware of instruction to finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
Correspondingly, the embodiment of the invention also provides a kind of UE, as shown in Figure 7, is a kind of structural representation of embodiment of the invention UE.
In this embodiment, described UE700 comprises: media information acquiring unit 701 and information transmitting unit 702.In addition, described UE700 also can further comprise: remove unit 703.Wherein:
Media information acquiring unit 701 is used for obtaining the media information that needs transfer.
Remove unit 703, when the branch mode that is used for the session shifted at needs is alternative, after Session Hand-off is finished, remove session.Particularly, session can be removed according to the notice of operation controlling entity in described dismounting unit 703, perhaps initiatively removes session.
For so that after the Session Hand-off success, the media information that shifts is transferred back to this UE again, in embodiments of the present invention, described information transmitting unit 702 also is used for after the Session Hand-off success, sends the heavy invitation message of SIP, and request regains described media information.
In addition, in embodiments of the present invention, also can further comprise: session modification unit (not shown) is used for the notice initiation session modification process according to operation controlling entity; Described media information acquiring unit 701 also is used for the session modification process according to the initiation of described session modification unit, regains described media information; The session modification process of perhaps initiating according to operation controlling entity regains described media information.
The UE of the embodiment of the invention can be used as the Session Hand-off transmit leg, and the initiation session transfer request is carried the media information that need to shift in the described session transfer request, thereby provides necessary information for Session Hand-off.Detailed process can with reference to the description in the method for embodiment of the invention realization SIP Session Hand-off shown in Figure 1, not repeat them here.
Correspondingly, the embodiment of the invention also provides a kind of UE, as shown in Figure 8, is the another kind of structural representation of this UE.
In this embodiment, described UE800 comprises: request receiving unit 801, business information acquiring unit 802 and business are set up unit 803.Wherein:
Business information acquiring unit 802 for the information of carrying according to described session transfer request, obtains to set up the required information of transfer service;
Business is set up unit 803, and the required information of transfer service of setting up that is used for utilizing described business information acquiring unit 802 to obtain is set up transfer service.
Particularly, described business information acquiring unit 802 can directly obtain to set up professional required information on the one hand from described session transfer request, on the other hand, the session transfer request that receives according to described request receiving element 801 is from different entities, described business information acquiring unit 802 can also obtain to set up professional required information by other means, and following two kinds of situations specifically can be arranged:
1. described request receiving element 801 receives session transfer request from the Session Hand-off transmit leg.
In this case, described UE800 also can further comprise: request transmitting unit and response receiving element (not shown).Wherein, the described request transmitting element is used for sending the session establishment request to SCF after described request receiving element 801 is received described session transfer request, carries the Session Hand-off sign in the described session establishment request; Described response receiving element is used for receiving the response message that SCF returns, and carries SCF in the described response message according to the side-play amount of described Session Hand-off sign from the business of the needs transfer of MCF acquisition.
In this case, described business information acquiring unit 802, concrete being used for obtains the described professional required information of setting up from the response message that described response receiving element receives.
2. described request receiving element 801 receives described session transfer request from SCF.
In this case, described request receiving element 801 also is used for receiving the session establishment request that SCF sends, and carries SCF in the described session establishment request from the side-play amount of the described business that need to shift of MCF acquisition; Described business information acquiring unit 802, concrete being used for obtains to set up professional required information from described session establishment request.
The UE of the embodiment of the invention can be used as the Session Hand-off recipient, receives session transfer request, and according to the information of carrying in the described session transfer request, sets up corresponding session.Detailed process can with reference to the description in the method for embodiment of the invention realization SIP Session Hand-off shown in Figure 2, not repeat them here.And the UE of the embodiment of the invention not only can realize whole transfers of Media Stream, and can realize that the part of Media Stream shifts.
Correspondingly, the embodiment of the invention also provides a kind of SCF, as shown in Figure 9, is a kind of structural representation of embodiment of the invention SCF.
In this embodiment, described SCF900 comprises: receiving element 901, granted unit 902 and session establishment unit 903.Wherein:
Receiving element 901 is used for receiving the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request; In actual applications, also can further carry following any one or more parameter in the described session transfer request: the indication of Session Hand-off message, Session Hand-off sign, Session Hand-off recipient, Session Hand-off indication, content identification and side-play amount.
In embodiments of the present invention, a kind of preferred result of described session establishment unit 903 comprises: acquisition of information subelement and session establishment subelement (not shown).Wherein, described acquisition of information subelement is used for initiation session and sets up process, obtains the side-play amount of RTSP gap marker and the business that needs to shift; Described session establishment subelement is used for described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient initiation and Session Hand-off recipient's session.
The SCF of the embodiment of the invention, after the session transfer request that receives the Session Hand-off transmit leg, the information of carrying in the session transfer request that can send according to the Session Hand-off transmit leg, initiatively initiation session is set up process, sets up corresponding session.And, not only can realize whole transfers of Media Stream, and can realize that the part of Media Stream shifts.Detailed process can be with reference to the description in the method for the front embodiment of the invention.
As shown in figure 10, be the another kind of structural representation of embodiment of the invention SCF.
In this embodiment, described SCF1000 comprises: receiving element 1001, granted unit 1002 and transmitting element 1003.Wherein:
Receiving element 1001 is used for receiving the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request; In actual applications, also can further carry following any one or more parameter in the described session transfer request: the indication of Session Hand-off message, Session Hand-off sign, Session Hand-off recipient, Session Hand-off indication, content identification and side-play amount;
Transmitting element 1003 is used for after described granted unit 1002 determines that transmit leg has the Session Hand-off authority, and the recipient sends session transfer request to Session Hand-off, carries the media information that needs transfer in the described session transfer request.
In embodiments of the present invention, described receiving element 1001 also is used for receiving the session establishment request that the Session Hand-off recipient initiates, and carries the Session Hand-off sign in the described session establishment request; Described granted unit 1002 is used for also determining whether described Session Hand-off recipient has the authority that receives Session Hand-off;
Alternatively, described SCF1000 also can further comprise: acquiring unit 1004, after determining that at described granted unit 1002 described Session Hand-off recipients have the authority that receives Session Hand-off, obtain the side-play amount of the business of RTSP gap marker and needs transfer from MCF according to described Session Hand-off sign.Described transmitting element 1003 also is used for described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient.
The SCF of the embodiment of the invention, after the session transfer request that receives the Session Hand-off transmit leg, the recipient sends session transfer request to Session Hand-off, makes the Session Hand-off recipient according to the media information that the needs that carry in this session transfer request shift, and sets up corresponding session.And, not only can realize whole transfers of Media Stream, and can realize that the part of Media Stream shifts.Detailed process can be with reference to the description in the method for the front embodiment of the invention.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for helping to understand method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (20)
1. a method that realizes the SIP Session Hand-off is characterized in that, comprising:
The Session Hand-off transmit leg obtains the media information that needs transfer;
The initiation session transfer request, carry the media information that needs transfer in the described session transfer request, obtain to set up the required information of transfer service so that the Session Hand-off recipient receives the media information that shifts according to described needs after the described session transfer request, and utilize the described required information of transfer service of setting up that obtains to set up transfer service; Wherein, describedly set up the side-play amount that the required information of transfer service comprises the business that needs shift, then described acquisition is set up the required information of transfer service and is specifically comprised: after described Session Hand-off recipient receives described session transfer request, send the session establishment request to operation controlling entity, carry the Session Hand-off sign in the described session establishment request, receive the response message that described operation controlling entity is returned, carry described operation controlling entity in the described response message according to the side-play amount of described Session Hand-off sign from the business of the described needs transfer of medium controlling entity MCF acquisition, from described response message, obtain the side-play amount of the described business that need to shift; Perhaps, described Session Hand-off recipient receives the session establishment request that operation controlling entity sends, carry the described side-play amount that needs the business of transfer that described operation controlling entity obtains from medium controlling entity MCF in the described session establishment request, described Session Hand-off recipient obtains the described professional required information of setting up from described session establishment request.
2. method according to claim 1 is characterized in that, also carries the Session Hand-off indication in the described session transfer request, and described Session Hand-off indication is used to indicate session all transfer or session section transfer.
3. method according to claim 1 and 2 is characterized in that,
Carry the media information of required transfer by the SDP in the message body in the described session transfer request; Perhaps
Carry the described media information that needs transfer by the message header in the described session transfer request; Perhaps
By with described media information in the capable corresponding serial number of each media represent the media information that described needs shift; Perhaps
Define the described media information that needs transfer by the XML grammer in the Session Hand-off message body.
4. method according to claim 1 and 2 is characterized in that, comprises branch mode in the described session transfer request, and described branch mode is alternative; Described method also comprises:
If needing the branch mode of the session of transfer is to substitute, after then Session Hand-off was finished, the Session Hand-off transmit leg was removed described session according to the notice of operation controlling entity; Perhaps the Session Hand-off transmit leg is initiatively removed described session.
5. method according to claim 1 and 2 is characterized in that, described method also comprises:
After the Session Hand-off success, described Session Hand-off transmit leg is by the heavy invitation message of SIP, and request regains described media information; Perhaps
Described Session Hand-off transmit leg regains described media information according to the notice initiation session modification process of operation controlling entity; Perhaps
The session modification process that described Session Hand-off transmit leg is initiated by operation controlling entity regains described media information.
6. a method that realizes the SIP Session Hand-off is characterized in that, comprising:
The Session Hand-off recipient receives session transfer request, carries the media information that needs transfer in the described session transfer request;
According to the information of carrying in the described session transfer request, obtain to set up the required information of transfer service;
Utilize the required information of transfer service of setting up that obtains to set up transfer service;
Wherein, describedly set up the side-play amount that the required information of transfer service comprises the business that needs shift, then described acquisition is set up the required information of transfer service and is specifically comprised:
After described Session Hand-off recipient receives described session transfer request, send the session establishment request to operation controlling entity, carry the Session Hand-off sign in the described session establishment request;
Receive the response message that described operation controlling entity is returned, carry described operation controlling entity in the described response message according to the side-play amount of described Session Hand-off sign from the business of the described needs transfer of medium controlling entity MCF acquisition;
From described response message, obtain the described side-play amount that needs the business of transfer;
Perhaps,
Described Session Hand-off recipient receives the session establishment request that operation controlling entity sends, and carries the described side-play amount that needs the business of transfer that described operation controlling entity obtains from medium controlling entity MCF in the described session establishment request;
Described Session Hand-off recipient obtains the described professional required information of setting up from described session establishment request.
7. method according to claim 6 is characterized in that, also carries the Session Hand-off indication in the described session transfer request, and described Session Hand-off indication is used to indicate session all transfer or session section transfer.
8. method according to claim 7 is characterized in that, described method also comprises:
Operation controlling entity receives the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request;
Determine whether described Session Hand-off transmit leg has the Session Hand-off authority;
If transmit leg has the Session Hand-off authority, then set up process according to the information initiation session in the described session transfer request; Perhaps send session transfer request to the Session Hand-off recipient, carry the media information that needs transfer in the described session transfer request.
9. method according to claim 8 is characterized in that, describedly sets up process according to the information initiation session in the described session transfer request and comprises:
Operation controlling entity is set up process to the medium controlling entity initiation session, obtains the side-play amount of real time streaming transport protocol RTSP gap marker and the business that needs to shift;
Described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient, initiation and Session Hand-off recipient's session.
10. method according to claim 8 is characterized in that, described method also comprises:
After operation controlling entity is received the session transfer request of Session Hand-off transmit leg transmission, the media information that the needs that carry in the described session transfer request shift is made amendment, and the amended media information that needs to shift is carried in the session establishment request that sends to the Session Hand-off recipient.
11. method according to claim 8 is characterized in that, described method also comprises:
Operation controlling entity receives the session establishment request that the Session Hand-off recipient initiates, and carries the Session Hand-off sign in the described session establishment request;
Determine whether described Session Hand-off recipient has the authority that receives Session Hand-off;
If described Session Hand-off recipient has the authority that receives Session Hand-off, then obtain the side-play amount of the business of RTSP gap marker and needs transfer from medium controlling entity according to described Session Hand-off sign;
Described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient.
12. a subscriber equipment is characterized in that, comprising:
The media information acquiring unit is used for obtaining the media information that needs transfer;
Information transmitting unit, be used for the initiation session transfer request, carry the media information that needs transfer in the described session transfer request, obtain to set up the required information of transfer service so that the Session Hand-off recipient receives the media information that shifts according to described needs after the described session transfer request, and utilize the described required information of transfer service of setting up that obtains to set up transfer service; Wherein, describedly set up the side-play amount that the required information of transfer service comprises the business that needs shift, then described acquisition is set up the required information of transfer service and is specifically comprised: after described Session Hand-off recipient receives described session transfer request, send the session establishment request to operation controlling entity, carry the Session Hand-off sign in the described session establishment request, receive the response message that described operation controlling entity is returned, carry described operation controlling entity in the described response message according to the side-play amount of described Session Hand-off sign from the business of the described needs transfer of medium controlling entity MCF acquisition, from described response message, obtain the side-play amount of the described business that need to shift; Perhaps, described Session Hand-off recipient receives the session establishment request that operation controlling entity sends, carry the described side-play amount that needs the business of transfer that described operation controlling entity obtains from medium controlling entity MCF in the described session establishment request, described Session Hand-off recipient obtains the described professional required information of setting up from described session establishment request.
13. subscriber equipment according to claim 12 is characterized in that, described subscriber equipment also comprises:
Remove the unit, when the branch mode that is used for the session shifted at needs is alternative, after Session Hand-off is finished, remove session.
14. according to claim 12 or 13 described subscriber equipmenies, it is characterized in that,
Described information transmitting unit also is used for after the Session Hand-off success, sends the heavy invitation message of SIP, and request regains described media information.
15. according to claim 12 or 13 described subscriber equipmenies, it is characterized in that, also comprise:
The session modification unit is used for the notice initiation session modification process according to operation controlling entity;
Described media information acquiring unit also is used for the session modification process according to the initiation of described session modification unit, regains described media information; The session modification process of perhaps initiating according to operation controlling entity regains described media information.
16. a subscriber equipment is characterized in that, comprising:
The request receiving unit is used for receiving session transfer request, carries the media information that needs transfer in the described session transfer request;
The business information acquiring unit for the information of carrying according to described session transfer request, obtains to set up the required information of transfer service;
Business is set up the unit, is used for utilizing the required information of transfer service of setting up that obtains to set up transfer service;
Wherein, the described request receiving element receives described session transfer request from the Session Hand-off transmit leg, then described subscriber equipment also comprises: request transmitting unit, be used for after the described request receiving element is received described session transfer request, send the session establishment request to operation controlling entity, carry the Session Hand-off sign in the described session establishment request; The response receiving element is used for receiving the response message that described operation controlling entity is returned, and carries described operation controlling entity in the described response message according to the side-play amount of described Session Hand-off sign from the business of the described needs transfer of medium controlling entity acquisition; Described business information acquiring unit, concrete being used for obtains the described professional required information of setting up from the described response message that described response receiving element receives;
Perhaps
The described request receiving element receives described session transfer request from operation controlling entity, described request receiving element then, also be used for receiving the session establishment request that described operation controlling entity sends, carry the described side-play amount that needs the business of transfer that described operation controlling entity obtains from medium controlling entity in the described session establishment request; Described business information acquiring unit, concrete being used for obtains the described professional required information of setting up from described session establishment request.
17. subscriber equipment according to claim 16 is characterized in that, directly obtains the described professional required information of setting up in the information that described business information acquiring unit carries from described session transfer request.
18. an operation controlling entity is characterized in that, comprising: receiving element, granted unit;
Described receiving element is used for receiving the session transfer request that the Session Hand-off transmit leg sends, and carries the media information that needs transfer in the described session transfer request;
Described granted unit is used for determining whether described Session Hand-off transmit leg has the Session Hand-off authority;
Described operation controlling entity also comprises:
The session establishment unit, be used for after described granted unit determines that transmit leg has the Session Hand-off authority, set up process according to the media information active initiation session that described needs shift, in the session establishment request, carry described operation controlling entity from the side-play amount of the business of the needs transfer of medium controlling entity MCF acquisition; Perhaps,
Transmitting element, be used for after described granted unit determines that transmit leg has the Session Hand-off authority, the recipient sends session transfer request to Session Hand-off, carry the media information that needs transfer in the described session transfer request, at this moment, described operation controlling entity obtains the side-play amount of RTSP gap marker and the business that needs to shift from medium controlling entity MCF.
19. operation controlling entity according to claim 18 is characterized in that, described session establishment unit comprises:
The acquisition of information subelement is used for initiation session and sets up process, obtains the side-play amount of real time streaming transport protocol RTSP gap marker and the business that needs to shift;
The session establishment subelement is used for described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient initiation and Session Hand-off recipient's session.
20. operation controlling entity according to claim 18 is characterized in that,
Described receiving element also is used for receiving the session establishment request that the Session Hand-off recipient initiates, and carries the Session Hand-off sign in the described session establishment request;
Described granted unit is used for also determining whether described Session Hand-off recipient has the authority that receives Session Hand-off;
Described operation controlling entity also comprises:
Acquiring unit is used for after described granted unit determines that described Session Hand-off recipient has the authority that receives Session Hand-off, obtains the side-play amount of the business of RTSP gap marker and needs transfer from medium controlling entity according to described Session Hand-off sign;
Described transmitting element also is used for described RTSP gap marker and described side-play amount are sent to the Session Hand-off recipient.
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| IN2014DN06621A (en) * | 2012-05-15 | 2015-05-22 | Ericsson Telefon Ab L M | |
| CN111918415B (en) * | 2019-05-10 | 2022-11-01 | 大唐移动通信设备有限公司 | Method and equipment for modifying double connection |
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| CN101316204A (en) * | 2007-05-28 | 2008-12-03 | 华为技术有限公司 | Conversation moving method and conversation moving system |
| CN101370292A (en) * | 2008-09-24 | 2009-02-18 | 深圳华为通信技术有限公司 | Method, apparatus and system for media transfer between terminals |
| CN101383827A (en) * | 2008-10-13 | 2009-03-11 | 深圳华为通信技术有限公司 | Method, apparatus and system for media transferring |
| CN101404822A (en) * | 2007-09-30 | 2009-04-08 | 华为技术有限公司 | Conversation transfer method, system and equipment |
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| CN101316204A (en) * | 2007-05-28 | 2008-12-03 | 华为技术有限公司 | Conversation moving method and conversation moving system |
| CN101404822A (en) * | 2007-09-30 | 2009-04-08 | 华为技术有限公司 | Conversation transfer method, system and equipment |
| CN101370292A (en) * | 2008-09-24 | 2009-02-18 | 深圳华为通信技术有限公司 | Method, apparatus and system for media transfer between terminals |
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