CN101841789B - Video communication method and system, and method for activating video communication of packet switched domain - Google Patents
Video communication method and system, and method for activating video communication of packet switched domain Download PDFInfo
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Abstract
The invention provides a video communication method and a system, and a method for activating video communication of a packet switched domain, which relates to the field of video communication, wherein the method for activating the video communication of the packet switched domain comprises the following steps: when a call session control function module (CSCF) of a calling party receives a message which shows that a called party is off-line and is transmitted by a call session control function module (CSCF) of the called party, the CSCF of the calling party transmits a request message to a mobile switching center; the mobile switching center generates data in a special format according to the request message; the mobile switching center transmits the data in the special format to the called party; and the called party responds to the data in the special format to connect the packet switched domain. The invention utilizes the characteristic that a circuit domain keeps on-line, and the off-line called party can receive the request message of video communication through the mobile switching center of the circuit domain, thereby activating the IP packet switched domain, saving the resources and improving the call completing rate of video communication.
Description
Technical field
The present invention relates to field of video communication, particularly relate to the method for a kind of video communication method and system, activating video communication of packet switched domain.
Background technology
In the 3G epoch, what talked about at most is the video call function of mobile phone, and this also is one of the most popular abroad 3G service.Rely on the Highspeed Data Transmission Technology of 3G network, the 3G mobile user can carry out point-to-point video communication.
At present, point-to-point video communication technology mainly contains two kinds: a kind of is video communication technology in circuit domain, and another kind is the video communication technology on the IP packet domain.Because the whole communication technology is all at the future development to packet domain, so the video communication technology on the IP packet domain will become the mainstream technology of industry.
Video communication technology on the IP packet domain is to be carried on the online a kind of technology of IP data communications, it is encoded after user's video, audio signal sample by terminal, and be transferred to end user terminal by IP network, video, the voice data of end user terminal after by the IP network received code decoded again, thereby realized video communication.
Can find out, its basis of video communication technology on the IP packet domain is based upon on the IP network, if the user need to carry out video communication, must guarantee that at first its terminal has connected IP network, if terminal called does not access IP network, video communication service will be difficult to realize: when user A wishes to carry out video communication with user B, user A accesses IP network, dial the video communication terminal of user B, but because the terminal of user B does not access IP network, the terminal that user A can't connecting subscribers participating B.Because the professional overwhelming majority of present mobile phone access IP network is not monthly payment, so having closed IP network when usage data is not professional, mobile phone terminal connects, the IP network that video communication must have corresponding technological means to solve and how activate the video communication called user terminal connects, and this just can make video communication service really feasible.
Summary of the invention
The objective of the invention is to propose the method for a kind of video communication method and system, activating video communication of packet switched domain, improve the availability of video communication.
For achieving the above object, the invention provides a kind of method of activating video communication of packet switched domain, comprising:
When caller calls session control function module CSCF received the not online notification message of expression callee that callee's call session control function module CSCF sends, calling party CSCF sent a request message to mobile switching centre;
Mobile switching centre receives the request message that calling party CSCF sends, and increases the video communication prefix before the called number in request message, to generate the data of caller identification message format;
To the send a telegram here data of display message form of mobile switching centre send the callee to; With
The callee responds the data of caller identification message format to connect packet domain.
The present invention also provides a kind of video communication method, comprising:
The calling party initiates the video communication request to caller calls session control function module CSCF;
Calling party CSCF sends the message of searching of searching the callee to callee's call session control function module CSCF;
When calling party CSCF received the not online notification message of expression callee that callee CSCF sends, calling party CSCF sent a request message to mobile switching centre;
Mobile switching centre receives the request message that calling party CSCF sends, and increases the video communication prefix before the called number in request message, to generate the data of caller identification message format;
To the send a telegram here data of display message form of mobile switching centre send the callee to; With
The callee responds the data of caller identification message format to connect packet domain.
The present invention also provides a kind of mobile switching centre, comprising:
Receiving element be used for to receive the request message that caller calls session control function module CSCF sends when receiving the not online notification message of expression callee that callee's call session control function module CSCF sends;
Data processing unit is used for increasing the video communication prefix, to generate the data of caller identification message format before the called number of request message; With
Transmitting element, the data of the display message form that is used for send a telegram here send the callee to, and the callee responds the data of caller identification message format with the connection packet domain.
The present invention also provides a kind of video communication system, comprising:
Caller calls session control function module CSCF, be used for receiving the video communication request that the calling party initiates, send the message of searching of searching the callee to callee's call session control function module CSCF, and when receiving the not online notification message of expression callee that callee CSCF sends, send a request message to mobile switching centre;
Callee's call session control function module CSCF is used for receiving and processing the message of searching of searching the callee that calling party CSCF sends, and sends a notification message to calling party CSCF when the callee is not online; With
Mobile switching centre, be used for to receive the request message that calling party CSCF sends when receiving the not online notification message of expression callee that callee CSCF sends, increase the video communication prefix before the called number in request message, to generate the data of caller identification message format, send the data of incoming call display message form to callee, the callee responds the professional format data to connect packet domain.
Based on technique scheme, the present invention has utilized circuit domain to keep online characteristics, and the mobile switching centre by circuit domain makes the not online callee can receive the solicited message of video communication, thereby activates the IP packet domain.In one embodiment, mobile switching centre increases the video communication prefix in the video communication solicited message, generates the caller identification data, sends the callee to.Like this, the user keeps when not required the time and being connected of IP packet domain, and also can not obtain the video communication solicited message by caller id information when online, thereby activate the packet domain connection.Save resource, improved the call completing rate of video communication.
Description of drawings
Accompanying drawing described herein is used to provide further explanation of the present invention, consists of a part of the present invention.Illustrative examples of the present invention and explanation thereof only are used for explaining the present invention, but do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation according to the application scenarios of the embodiment of the invention.
Fig. 2 is the flow chart according to the method for the activating video communication of packet switched domain of the embodiment of the invention.
Fig. 3 is the flow chart of the method for activating video communication of packet switched domain according to another embodiment of the present invention.
Fig. 4 is the flow chart according to the video communication method of the embodiment of the invention.
Fig. 5 is the flow chart of video communication method according to another embodiment of the present invention.
Fig. 6 is the structural representation according to the mobile switching centre of the embodiment of the invention.
Fig. 7 is the structural representation according to the video communication system of the embodiment of the invention.
Fig. 8 is the structural representation of video communication system according to another embodiment of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described in more detail, exemplary embodiment of the present invention wherein is described.In the accompanying drawings, identical label represents identical or similar assembly or element.
Fig. 1 is the structural representation according to the application scenarios 100 of the embodiment of the invention.Application scenarios 100 comprises: MSC/VLR (Mobile Switching Center, mobile switching centre/Visitor Location Register VLR Visitor Location Register) 102, access module 104, HLR (Home Location Register, attaching position register) 106, SCP (Service Control Point, service control point) 108, MGCF (Media Gateway Control Function, the MGCF module) 110, CSCF (Call State Control Function, call session control function module) 112 and PDSN (Packet Data Serving Node, packet data serving node) 114.
MSC/VLR 102 comprises mobile switching centre and VLR Visitor Location Register.MSC can control the travelling carriage that is arranged in its overlay area, and finishes the function that speech channel continues, and also is such as the mobile network of CDMA and the interface between other networks.MSC can finish the functions such as switching between talking connection, charging, BTS (base transceiver station, base transceiver station) and the MSC and complementary RRM, mobile management.VLR is used for calling, the information of the required retrieval of outgoing call and the information of user's signing service and supplementary service that storage institute compass of competency calls on a customer, client's number for example, the identification in zone, present position, the parameters such as service that provide to the client.
HLR 106 is the network elements such as GSM/GPRS/EDGE server net.HLR 106 is databases, storing the user's of certain operator related data, for example: supplementary service, authentication parameter, APN (Access Point Name, APN), MSC/VLR 102 numbers of user's current accessed, the SGSN number of user's current accessed etc.
MGCF 110 is IMS (IP Multimedia Subsystem, IP Multimedia System) a part, can with CSCF (Call State Control Function, call session control function module) 112 communicates, the connection of control media channel in IMS-MGW (IP Multimedia Subsystem Media Gateway, IP Multimedia System media gateway).In addition, MGCF 110 can be at ISDN (Integrated Services Digital Network, integrated services digital network) conversion carries on an agreement between ISUP (ISDN User Part, ＩＳＤＮUser Part) and the IP Multimedia System pager control protocol.
CSCF 112 is the inner functional entitys of IMS (IP Multimedia Subsystem, IP Multimedia System), is whole IMS server, the main signaling control of being responsible for processing in the multimedia call session process.CSCF 112 can managing I MS network subscription authentication, IMS loading end QoS (Quality of Service, service quality), cooperate with other network entity and to carry out SIP (Session Initiated Protocol, initial session protocol) control of session, and service negotiation and resource distribution etc.
PDSN 114 is wireless packet data IADs of accepting wireless network and packet data network, and simple IP and Mobile IP access way are provided, and the service of access Internet or Intranet is provided for travelling carriage.
In present video communication service, each user terminal all has two connections, and one is circuit domain, and another is the IP packet domain.The user carries out voice call by circuit domain.When the user carried out video communication, the user need to be connected to the IP packet domain, and when carrying out video communication, the video between the user and audio frequency all transmit by the IP packet domain.Usually, the user is (unless user's shutdown) of always connecting with being connected of circuit domain, and disconnects with being connected generally of IP packet domain.Therefore, in the prior art, when the callee did not connect packet domain, the video communication request that the calling party initiates can't meet with a response.And according to embodiments of the invention, can utilize the circuit domain that remains connection status to activate packet domain, so that not online callee can respond calling party's video communication request.Wherein, calling party and callee can be the communication terminals such as IPTV, phone.
Fig. 2 is the flow chart according to the method 200 of the activating video communication of packet switched domain of the embodiment of the invention.
In step 202, when caller calls session control function module CSCF received the not online message of expression callee that callee's call session control function module CSCF sends, calling party CSCF sent a request message to mobile switching centre.
In step 204, mobile switching centre generates the professional format data according to request message.
In step 206, mobile switching centre sends the professional format data to callee.
In step 208, the callee responds the professional format data to connect packet domain.
The present invention has utilized circuit domain to keep online characteristics, and the mobile switching centre by circuit domain makes the not online callee can receive the solicited message of video communication, thereby activates the IP packet domain.Like this, the user keeps when not required the time and being connected of IP packet domain, and has saved resource, has improved the call completing rate of video communication.
Fig. 3 is the flow chart of the method 300 of according to another embodiment of the present invention activating video communication of packet switched domain.
In step 302, when caller calls session control function module CSCF received the not online message of expression callee that callee's call session control function module CSCF sends, calling party CSCF sent a request message to mobile switching centre.
In step 304, increase the video communication prefix before callee's number of mobile switching centre in request message, generate the professional format data of caller identification message format.Incoming display technology is a kind of very ripe technology, and communication terminal and network can both be supported substantially at present.Incoming display technology refers to that switch provides the transmission of the data of caller ID professional format to the user, and user terminal can utilize the terminal that meets the data decode call format to receive and show.After switch sends the bell signal first time, and then send a string modulation signal, such as FSK (Frequency-shift Keying, frequency shift keying), or DTMF (Dual Tone Multi Frequency, the dual-tone multifrequency form) signal, this modulation signal can comprise the information such as telephone number, date, time, name and video communication prefix of dialing party.Calling subscriber number indicator begins to receive fsk signal under the waking up of bell signal each time, (such as the RC145447 of Motorola) obtains wherein information through decoding chip, is carried out format analysis processing and is shown at screen by single-chip microcomputer.Equally, if what transmit is the DTMF caller ID information, only need carry out data decode by the DTMF decoding chip, can show the caller ID of DTMF.
In step 306, mobile switching centre sends the professional format data to callee.
In step 308, the callee judges namely that by the front prefix of judging caller ID incoming call is that common audio call or video communication called out.
In step 310, if video communication is called out, the callee responds the professional format data to connect packet domain.
In step 312, if normal voice calls, the callee presses the voice flow process and connects.
Fig. 4 is the flow chart according to the video communication method 400 of the embodiment of the invention.
In step 402, the calling party initiates the video communication request to caller calls session control function module CSCF.
In step 404, calling party CSCF sends to callee's call session control function module CSCF and searches callee's request message.
In step 406, when calling party CSCF received the not online message of expression callee that callee CSCF sends, calling party CSCF sent a request message to mobile switching centre.
In step 408, mobile switching centre generates the professional format data according to request message.
In step 410, mobile switching centre sends the professional format data to callee.
In step 412, the callee responds the professional format data to connect packet domain.
Fig. 5 is the flow chart of video communication method 500 according to another embodiment of the present invention.
In step 502, the calling party initiates the video communication request to caller calls session control function module CSCF.
In step 504, calling party CSCF sends to callee's call session control function module CSCF and searches callee's request message.
In step 506, when calling party CSCF received the not online message of expression callee that callee CSCF sends, calling party CSCF can send a request message to the MGCF module.
In step 508, the MGCF module is transmitted to mobile switching centre with request message.
In step 510, mobile switching centre generates the professional format data according to request message.In one embodiment, mobile switching centre can increase the video communication prefix before the callee's number in request message, generates the data of caller identification message format.
In step 512, mobile switching centre sends the professional format data to callee.
In step 514, the callee judges namely that by the front prefix of judging caller ID incoming call is that common audio call or video communication called out.
In step 516, if video communication is called out, the callee responds the professional format data to connect packet domain.
In step 518, if normal voice calls, the callee presses the voice flow process and connects.
Fig. 6 is the structural representation according to the mobile switching centre 600 of the embodiment of the invention.Mobile switching centre 600 comprises receiving element 602, data processing unit 604 and transmitting element 606.
Receiving element 602 is used for receiving the request message of calling party CSCF transmission when caller calls session control function module CSCF receives the not online message of expression callee that callee's call session control function module CSCF sends.
Transmitting element 606 is used for sending the professional format data to callee, and the callee responds the professional format data to connect packet domain.
Fig. 7 is the structural representation according to the video communication system 700 of the embodiment of the invention.Video communication system 700 comprises: caller calls session control function module CSCF 702, callee's call session control function module CSCF 704 and mobile switching centre 706.
Calling party CSCF 702 is used for receiving the video communication request that the calling party initiates.
Fig. 8 is the structural representation of video communication system 800 according to another embodiment of the present invention.Video communication system 800 comprises: caller calls session control function module CSCF 802, callee's call session control function module CSCF 804, mobile switching centre 806 and MGCF module 808.
Calling party CSCF 802 is used for receiving the video communication request that the calling party initiates.
Callee CSCF 804 is used for receiving and processing the request message of searching the callee that calling party CSCF 802 sends.
MGCF module 808 is used for receiving the request message that calling party CSCF sends, and request message is transmitted to mobile switching centre.
Mobile switching centre 806 is used for when calling party CSCF 802 receives the not online message of the expression callee of callee CSCF 804 transmissions, receive request message, generate the professional format data according to request message, send the professional format data to callee, the callee responds the professional format data to connect packet domain.
The present invention has utilized circuit domain to keep online characteristics, and the mobile switching centre by circuit domain makes the not online callee can receive the solicited message of video communication, thereby activates the IP packet domain.In one embodiment, mobile switching centre increases the video communication prefix in the video communication solicited message, generates the caller identification data, sends the callee to.Like this, the user keeps when not required the time and being connected of IP packet domain, and also can not obtain the video communication solicited message by caller id information when online, thereby activate the packet domain connection.Save resource, improved the call completing rate of video communication.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.
Claims (6)
1. the method for an activating video communication of packet switched domain is characterized in that, comprising:
When caller calls session control function module CSCF received the not online notification message of expression callee that callee's call session control function module CSCF sends, calling party CSCF sent a request message to mobile switching centre;
Mobile switching centre receives the request message that calling party CSCF sends, and increases the video communication prefix before the called number in request message, to generate the data of caller identification message format;
To the send a telegram here data of display message form of mobile switching centre send the callee to; With
The callee responds the data of caller identification message format to connect packet domain.
2. a video communication method is characterized in that, comprising:
The calling party initiates the video communication request to caller calls session control function module CSCF;
Calling party CSCF sends the message of searching of searching the callee to callee's call session control function module CSCF;
When calling party CSCF received the not online notification message of expression callee that callee CSCF sends, calling party CSCF sent a request message to mobile switching centre;
Mobile switching centre receives the request message that calling party CSCF sends, and increases the video communication prefix before the called number in request message, to generate the data of caller identification message format;
To the send a telegram here data of display message form of mobile switching centre send the callee to; With
The callee responds the data of caller identification message format to connect packet domain.
3. video communication method according to claim 2 is characterized in that, calling party CSCF sends a request message to mobile switching centre and comprises:
Calling party CSCF sends a request message to the MGCF module; With
The MGCF module is transmitted to mobile switching centre with request message.
4. a mobile switching centre is characterized in that, comprising:
Receiving element be used for to receive the request message that caller calls session control function module CSCF sends when receiving the not online notification message of expression callee that callee's call session control function module CSCF sends;
Data processing unit is used for increasing the video communication prefix, to generate the data of caller identification message format before the called number of request message; With
Transmitting element, the data of the display message form that is used for send a telegram here send the callee to, and the callee responds the data of caller identification message format with the connection packet domain.
5. a video communication system is characterized in that, comprising:
Caller calls session control function module CSCF, be used for receiving the video communication request that the calling party initiates, send the message of searching of searching the callee to callee's call session control function module CSCF, and when receiving the not online notification message of expression callee that callee CSCF sends, send a request message to mobile switching centre;
Callee's call session control function module CSCF is used for receiving and processing the message of searching of searching the callee that calling party CSCF sends, and sends a notification message to calling party CSCF when the callee is not online; With
Mobile switching centre, be used for to receive the request message that calling party CSCF sends when receiving the not online notification message of expression callee that callee CSCF sends, increase the video communication prefix before the called number in request message, to generate the data of caller identification message format, send the data of incoming call display message form to callee, the callee responds the professional format data to connect packet domain.
6. video communication system according to claim 5 is characterized in that, also comprises:
The MGCF module is used for receiving the request message that calling party CSCF sends, and request message is transmitted to mobile switching centre.
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| CN102238234A (en) * | 2011-06-13 | 2011-11-09 | 袁亭 | CS (circuit switched)-domain-based PS (package swtiched) domain point-to-point communication method and application scenario thereof |
| CN103051863B (en) * | 2011-10-17 | 2016-09-14 | 腾讯科技（深圳）有限公司 | A kind of session setup method and system |
| CN104684103B (en) * | 2013-11-28 | 2019-04-09 | 中国电信股份有限公司 | For establishing the methods, devices and systems for the communication connection that direct transfers |
| CN106470194A (en) * | 2015-08-20 | 2017-03-01 | 中兴通讯股份有限公司 | Networking telephone connection processing method and device |
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| CN1620019A (en) * | 2004-07-20 | 2005-05-25 | 深圳市沃通通信服务有限公司 | Method of realizing mobile instant communication based on internet address technology and its application |
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