CN1798139A - Devices and method of providing multimedia service for different network terminals - Google Patents
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Abstract
The invention can be configured into SIP server or H.323 gate keeper. It consists of a controller for use in providing a session control function base on SIP or a calling control function based on H.323 protocol, a protocol interface unit for use in providing an H.323 interface or SIP interface that communicates with the controller, a service management unit that communicates with the controller for use in providing the management function or the interface.
Description
Technical field
The present invention relates to the communications field, relate in particular to equipment and method that multimedia service is provided for different network terminals.
Background technology
Competition between the telecom operators is with more and more fierce.Therefore, the problem that how to reduce networking investment, reduces operation and maintenance cost becomes more and more important.The network integration can realize that operator provides miscellaneous service on same network, unifies service, unified management, the unified charging by the shared realization of equipment in the network, and final realization minimizing drops into, the purpose of additional income.
Along with the arriving of the 3rd third-generation mobile communication commercialization, mobile video signal has been subjected to extensive concern.The comprehensive videoconferencing service of mobile network and fixed network is undoubtedly the certainty of future market development.The mobility of portable terminal and portability make following video conference more can satisfy the demand that people generally link up.Because mobile network and fixed network are all different at aspects such as video signal session and host-host protocols, make the intercommunications of two nets become the matter of utmost importance of following pendulum in ours in front.
The purpose of this invention is to provide a kind of new equipment and method that multimedia service is provided for different network terminals.
Summary of the invention
For above-mentioned purpose, the present invention proposes a kind of multimedia server, it can be configured to session initiation protocol (SIP) server or gatekeeper H.323, comprising: control device is used to provide the conversation control function of dialogue-based initiation protocol or based on the CCF of agreement H.323; Protocol interface device is used to provide H.323 interface and session initiation protocol interface function, and this protocol interface device and described control device have the exchange of data flow; And the service management device, being used to provide and professional relevant management function or interface, this service management device and described control device have the exchange of data flow.
The invention allows for a kind of method of carrying out multimedia transmission between the session initiation protocol wireless terminal, comprise step: the session initiation protocol wireless terminal is registered in above-mentioned multimedia server;
Caller session initiation protocol wireless terminal sends call request to above-mentioned multimedia server, by the latter legitimate verification is carried out in this call request, when checking by and when finding called session initiation protocol wireless terminal, to called transmission call request; After called session initiation protocol wireless terminal is received call request, carry out call answering to above-mentioned multimedia server, and this call answering is sent to caller by the latter; Between the session initiation protocol wireless terminal, carry out the transmission of media stream.
The invention allows for a kind of method of carrying out multimedia transmission between session initiation protocol wireless terminal and session initiation protocol fixed terminal, comprise step: the session initiation protocol wireless terminal is registered in above-mentioned multimedia server; By above-mentioned multimedia server, between session initiation protocol wireless terminal and session initiation protocol fixed terminal, carry out call establishment; After call establishment is finished, between session initiation protocol wireless terminal and session initiation protocol fixed terminal, carry out the transmission of media stream.
The invention allows for a kind of session initiation protocol wireless terminal and participate in the H.323 method of the video conference of network, comprise step: the session initiation protocol wireless terminal is registered in above-mentioned multimedia server; The session initiation protocol wireless terminal sends the message that request enters video conference by above-mentioned multimedia server to the interconnecting gateway functional part; The interconnecting gateway functional part carries out protocol conversion to the message of this request, to connect with multipoint control unit; After connecting foundation, the interconnecting gateway functional part receives multimedia from the session initiation protocol wireless terminal, through behind the transcoding this multimedia is sent to described multipoint control unit.
The invention allows for a kind of H.323 wireless terminal and fixed terminal H.323 and carry out the method for multimedia transmission, comprise step: H.323 wireless terminal is registered in above-mentioned multimedia server; H.323 wireless terminal is by above-mentioned multimedia server, with H.323 fixed terminal foundation calling; Carry out the transmission of media stream at wireless terminal H.323 and fixed terminal H.323.
According to the present invention, can make full use of the Internet resources of having disposed, promptly merge the resource of mobile network and fixed network, provide for example data, audio frequency, the service of multimedia messagess such as video.
Description of drawings
Preferred implementation of the present invention is described below with reference to the accompanying drawings, wherein:
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Fig. 1 shows according to an embodiment of the invention, and the block diagram of the equipment of multimedia service is provided for different network terminals;
Fig. 2 shows according to an embodiment of the invention, carries out the system of multimedia transmission between wireless terminal and wireless terminal or the fixed terminal;
Fig. 3 shows the process that wireless terminal 101 is registered in multimedia server 10;
Fig. 4 is a flow chart, shows two multimedia transmission processes between the SIP wireless terminal;
Fig. 5 is a flow chart, shows the multimedia transmission process of SIP wireless terminal and SIP fixed terminal;
Fig. 6 is a flow chart, shows SIP wireless terminal 101 and participates in the H.323 process of the video conference of network.
Embodiment
Fig. 1 shows according to an embodiment of the invention, and the block diagram of the equipment of multimedia service is provided for different network terminals.
This equipment can be different network terminals, and for example the terminal on mobile network and the fixed network provides video, audio frequency and data three-in-one multimedia service.
Below, for the convenience that illustrates, this for providing the equipment of multimedia service, different network terminals is called multimedia server.
As shown in Figure 1, this multimedia server 10 comprises control device 12, is used to provide the controlled function of calling or session.This control device 12 provides dialogue-based initiation protocol (SessionInitiation Protocol, conversation control function SIP) or based on the CCF of agreement H.323.
Wherein, H.323 standard is that standardization department of international telecommunication union telecommunication (ITU-T) sets up on basis H.320/H.324, its application target is in the network environment of internet protocol-based (IP), to realize reliable real-time application towards audio frequency, video and data.Purpose for simplicity is not described in detail this standard here.
Session Initiation Protocol is proposed by the Internet engineering duty group (IETF), and its application target is based on internet environment, realizes data, Voice ﹠ Video real-time communication.Purpose for simplicity is not described in detail this standard here, about the detail of this agreement, and can be with reference to request comment (RFC) 3261 of IETF.
This multimedia server 10 also comprises protocol interface device 11.This protocol interface device 11 except for provide based on H.323 with the business of Session Initiation Protocol, thereby comprise H.323 outside the interface and SIP interface, signalling system No.7 interface, interfaces such as interface, internet device control protocol interface (IPDC) and Media Gateway Control Protocol interface H.248 for example can also be provided, with can with intercommunications such as next generation network (NGN), mobile voice net.The exchange of data flow is arranged between this protocol interface device 11 and the above-mentioned control device 12.
This multimedia server 10 also comprises service management device 13.This service management device 13 provides and professional relevant management function or interface, for example access of operation management maintain (OAM) function or interface, VPN(Virtual Private Network) management function or interface, orientation management function or interface, authentication and authorization charging (AAA) function or interface and applications or interface etc.The exchange of data flow is arranged between this service management device 13 and the above-mentioned control device 12.
In a word, this multimedia server can be configured to sip server according to actual demand, perhaps gatekeeper H.323 comprises for example functions such as address translation, admittance control, bandwidth control, territory management, call control signalling, calling authorization, route control, Bandwidth Management and call manager.
According to an embodiment of the invention, this multimedia server 10 also comprises protocol conversion apparatus 14, is used for the conversion between different agreement, for example, converts Session Initiation Protocol to H.323 agreement.This protocol conversion apparatus 14 can have the exchange of data flow with above-mentioned control device 12 and/or above-mentioned protocol interface device 11.
Multimedia server according to the present invention has height scalability, advantages such as good extensibility and comprehensive management function.
Fig. 2 shows according to an embodiment of the invention, carries out the system of multimedia transmission between wireless terminal and wireless terminal or the fixed terminal.
As shown in Figure 2, this system comprises wireless network 100, SIP network 200 and network 300 H.323.Wherein, SIP network 200 and H.323 network 300 are fixed networks, the Internet for example.
In wireless network 100, wireless terminal 101,102 and 103, for example the palmtop PC (PPC) of surfing the Net by wireless network card, intelligent wireless phone, mobile personal digital assistant (PDA) etc. for example are connected to packet data serving node (PDSN) 104 by (not shown)s such as base station repeater station and base station controllers by wireless access network.
Above-mentioned wireless terminal 101,102 and 103 can be a terminal of supporting SIP, also can be the terminal of supporting H.323.
Here, for the convenience that illustrates, only show three wireless terminals 101,102 and 103, and regulation wireless terminal 101 and 102 is wireless terminals of supporting SIP, wireless terminal 103 is for supporting wireless terminal H.323.Certainly, it will be understood by those of skill in the art that afore mentioned rules just schematically, can not be interpreted as limitation of the present invention.
In one embodiment according to the present invention, characteristics for the low code check that can adapt to wireless channel, SIP wireless terminal 101 and 102 adopts the encryption algorithm of low code check, for example, for audio frequency, adopt adaptive multi-rate (AMR) algorithm,, adopt Motion Picture Experts Group 4 (MPEG 4) algorithm for video.
Wherein, PDSN 104 is wireless access network and packet switched public data network, the gateway between the Internet for example, it is the access device of wireless terminal access internet, it provides for example wireless functions such as mutual conversion to IP signaling, thereby reach the purpose of shielding network signal, just the terminal with the IP network end is the same to make the behavior of the wireless terminal seen from the IP network end.
And PDSN 104 is connected to below the multimedia server 10 of the SIP network 200 that will describe in detail.
Here, for the convenience that illustrates, only show two terminals 202 and 203 of supporting Session Initiation Protocol.Certainly, it will be understood by those of skill in the art that this just schematically.
Wherein, multimedia server 10 is connected to below with the interconnecting gateway functional part of describing in detail (IWF) 305.
H.323 network 300 among Fig. 2 comprises multipoint control unit (MCU) 302, terminal 303 and 304 H.323, and IWF 305, and gatekeeper 301.Wherein IWF 305, and H.323 terminal 303 and 304 is connected to MCU 302, and, terminal 303 and 304 H.323, MCU302, IWF 305 is connected to gatekeeper 301.
Here, for the convenience that illustrates, only show two and support the H.323 terminal 303 and 304 of agreement.Certainly, it will be understood by those of skill in the art that this just schematically.
Wherein, according to standard H.323, H.323 terminal 303 and 304 is supported for example following function: support signaling and control, promptly support H.245 agreement and H.225 agreement and RAS (registration, permission and state) agreement; Support real time communication, promptly support RTP/RTCP agreement (RTP/RTCP Real-time Transport Control Protocol); Support coding, i.e. compression before the transmission decompresses after receiving.
The main effect of MCU 302 is to support the terminal more than 3 to carry out session.Typical MCU comprises a multipoint controller (MC) and several (also can not having) multipoint processors (MP).MC provides controlled function, for example negotiation among terminals, decision processing speech or the total ability of video.MP finishes the processing of the media stream in the session, for example the mixing of speech, voice exchange etc.
The major function of IWF 305 is to carry out real time flow medium, and for example coded format of audio/video conversion for example, converts MPEG4 (active images expert group) H.263 to, and G.711 adaptive multi-rate (AMR) is converted to, G.723.1, G.729.
Alternatively, IWF also can comprise protocol conversion function, is used for the conversion between different agreement, for example, converts Session Initiation Protocol to H.323 agreement.
According to an embodiment of the invention, when the wireless terminal of supporting Session Initiation Protocol, for example wireless terminal 101, think and another supports the wireless terminal of SIP that for example wireless terminal 102, perhaps with another fixing sip terminal, for example terminal 202, when carrying out session, wireless terminal, for example wireless terminal 101 and 102 must registration in multimedia server 10 earlier.
Fig. 3 shows the process that wireless terminal 101 is registered in multimedia server 10.
As shown in Figure 3, at first, at step S30, wireless terminal 101 is placed on the radio network gateway IP address allocated of the number of oneself and for example PDSN 104 and so in the register requirement, sends to corresponding multimedia server 10.
The information of 10 pairs of these wireless terminals 101 of multimedia server is made corresponding legitimate verification.When legitimate verification passes through, multimedia server 10 will be noted the resource information of this number and IP address.
Then, at step S32, multimedia server 10 is told wireless terminal 101 with registering result.
Also the registration process with wireless terminal 101 described above is identical to should be appreciated that the registration process of wireless terminal 102.
Like this, through repeatedly registration, multimedia server 10 will obtain information table as shown in table 1, and managing SIP wireless terminal on this basis is for address resolution and route are made in each calling.
| SIP wireless terminal number | The IP address information |
| 13312345678 | 172.24.193.1 |
| 13112345678 | 172.24.193.56 |
| ... | |
| 13387654321 | 172.24.193.2 |
| 13187654321 | 172.24.193.23 |
Table 1
For the SIP wireless terminal of having registered, can carry out the call peer terminal by multimedia server 10, to finish media stream, video flowing for example, transmission.
Fig. 4 is a flow chart, shows two SIP wireless terminals, for example the transmission of multimedia streams process between the wireless terminal 101 and 102.
As shown in Figure 4, at first, at step S41, SIP wireless terminal 101 to be to multimedia server 10 request of setting up that makes a call, and wherein comprises the number that it thinks the other side SIP wireless terminal 102 of communicating by letter with it in this request.
After multimedia server 10 receives this request message, the legitimacy of this request is verified.When checking was passed through, multimedia server 10 was searched and the corresponding IP address information of the number of SIP wireless terminal 102.
When searching successfully, multimedia server 10 initiates to set up call request to SIP wireless terminal 102, shown in step S42.
After multimedia server 10 is received the response message of sending from SIP wireless terminal 102, send response messages to SIP wireless terminal 101, shown in step S44.
Like this, just can carry out media stream between the SIP wireless terminal 101 and 102, for example transmission of MPEG 4 video flowings is shown in step S45.
In one embodiment according to the present invention, at SIP wireless terminal 101 and SIP fixed terminal, for example carry out the transmission of media stream between the sip terminal 202 of SIP network 200.
Fig. 5 is a flow chart, shows the transmission of multimedia streams process of SIP wireless terminal and SIP fixed terminal.
When SIP wireless terminal 101 is thought and a SIP fixed terminal, for example sip terminal 202 is set up contact, carries out media stream, and for example during the transmission of voice/video, it will send " invitation " message to multimedia server 10.
After multimedia server 10 was received " invitation " message of sending from SIP wireless terminal 101, by operations such as for example addressing, to purpose SIP fixed terminal, for example SIP fixed terminal 202 sent " invitation " message here.
And, passed through the requirement of SIP wireless terminal 101 when multimedia server 10 after, it is immediately to one of the SIP wireless terminal 101 times state information of " in the trial " for example.
Similarly, passed through the requirement of multimedia server 10 when SIP fixed terminal 202 after, it is immediately to one of the multimedia server 10 times state information of " in the trial " for example.And it also sends " ring (ring) " information to multimedia server 10.
After receiving " ring " information of sending from SIP fixed terminal 202 when multimedia server 10, it also sends " ring " information to SIP wireless terminal 101.
When SIP fixed terminal 202 was ready to carry out transmission of multimedia streams, it sent " OK " message to multimedia server 10.
After multimedia server 10 is received " OK " message of sending from SIP fixed terminal 202, send " OK " message to SIP wireless terminal 101.
After receiving " OK " message of sending from multimedia server 10 when SIP wireless terminal 101, it knows that the SIP fixed terminal 202 of opposite end carried out the preparation of carrying out transmission of multimedia streams, therefore send " ACK (affirmation) " message to multimedia server 10, prompting " OK " message is received.
After multimedia server 10 is received this " ACK " message, give SIP fixed terminal 202 with this forwards.
Like this, the calling between SIP wireless terminal 101 and the SIP fixed terminal 202 is set up, can carry out media stream according to RTP/RTCP, for example the transmission of video flowing.
When sign off, a side, for example SIP wireless terminal 101 sends " BYE " message to multimedia server 10, and expression finishes current media stream, for example transmission of video flowing.
After multimedia server 10 was received this " BYE " message, to the opposing party, for example SIP fixed terminal 202 was transmitted this message.
The opposing party, after for example the whole stiff end 202 of SIP is received this " BYE " message, know that the SIP wireless terminal 101 of opposite end wants to finish current media stream, the for example transmission of video flowing, as response, SIP fixed terminal 202 sends " OK " message to multimedia server 10, and expression can finish the transmission of current media stream.
After multimedia server 10 is received this " OK " message, transmit this message to SIP wireless terminal 101.
Like this, the calling between SIP wireless terminal 101 and the SIP fixed terminal 202 is removed, and transmission of multimedia streams finishes.
In according to another implementation of the invention, SIP wireless terminal 101 is participated in the video conference under H.323 the MCU 302 of network 300 controls.
The content that should be noted that video conference described here can comprise audio frequency, video and/or data.
Fig. 6 is a flow chart, shows the process that SIP wireless terminal 101 is participated in the video conference under H.323 the MCU 302 of network 300 controls.
When SIP wireless terminal 101 was wanted to participate in video conference, it sent " invitation " message to multimedia server 10.
After multimedia server 10 is received this " invitation " message,, know that SIP wireless terminal 101 wants to participate in video conference according to the content in this message.Because the equipment MCU 302 that supports video conference is at network 300 H.323, therefore, it sends to IWF 305 should " invitation " message.
Because what wireless terminal 101 adopted is Session Initiation Protocol, be agreement H.323 and MCU 302 adopts, in order to reach the purpose of intercommunication, in one embodiment according to the present invention, multimedia server 10 places carry out SIP and H.323 between protocol conversion.In according to another implementation of the invention, this function realizes at IWF 305 places.
As previously mentioned, H.323 in the network 300 all types of equipment before setting up call, all need to gatekeeper's 301 logins and obtain its permission.Therefore, after IWF 305 receives this " invitation " message, 301 send " license request (ARQ) " message to the gatekeeper, request authentication and the address resolution procedure of a RAS of beginning.
Work as authentication success, after IWF 305 receives " ACF " message, according to MCU 302 addresses that wherein comprise, send " foundation " message, the beginning call establishment to MCU 302.
After MCU 302 receives " foundation " message, to IWF 305 loopbacks " calling is carried out " message.And MCU 302 sends " ring " message to IWF 305.When MCU 302 is ready to, send " connecting " message to IWF 305.
Like this, the call establishment between IWF 305 and the MCU 302 finishes.
Next between MCU 302 and IWF 305, carry out capabilities exchange procedure, determine the employed ability of this video conference, for example the audio frequency of Zhi Chiing, video compression algorithm etc.
After finishing capabilities exchange procedure, next open the logical channel process at MCU 302 and IWF 305.
After opening logical channel, IWF 305 sends " OK " message to multimedia server 10, confirms can begin to carry out video conference.
After multimedia server 10 is received " OK " message of sending from IWF 305, give SIP wireless terminal 101 with this forwards.
Like this, SIP wireless terminal 101 just can by multimedia server 10, send multimedia messages, the especially for example stream media information of video/audio to IWF 305 according to for example Real-time Transport Protocol.
G.723.1 or G.729 after IWF 305 received the multimedia messages of sending from SIP wireless terminal 101, to multimedia messages, for example real time flow medium carried out the coded format conversion, for example, H.263 MPEG 4 was converted to, and G.711 AMR is converted to.And, send the multimedia messages of changing to MCU 302 according to Real-time Transport Protocol.
Similarly, MCU 302 also can send multimedia messages, the especially for example stream media information of video/audio to IWF 305 according to for example Real-time Transport Protocol.
After IWF 305 received the multimedia messages of sending from MCU 302, to some multimedia messages, for example real time flow medium carried out the coded format conversion, for example, will H.263 be converted to MPEG 4, will be G.711, G.723.1 or G.729 be converted to AMR.And,, send the multimedia messages of changing to SIP wireless terminal 101 by multimedia server 10 according to Real-time Transport Protocol.
Certainly, it will be understood by those of skill in the art that above-mentioned MCU 302 also can be a terminal 303 or 304 etc. H.323, just when MCU 302 changes into to terminal 303 H.323 or 304 etc., can only carry out end-to-end video session, and can not carry out video conference.
Shall also be noted that other terminal except that the 1st terminal adds video conference, both can call out it and add meeting that also can initiatively initiating as described above by terminal, the calling MCU of process adds meeting by MCU 302.
In another execution mode according to the present invention, wireless H.323 terminal 103 thinks and fixes H.323 terminal and carry out media stream, video for example, the transmission of audio frequency and/or data.
Similarly, after wireless H.323 terminal 103 must be registered in multimedia server 10 earlier, ability and distant terminal carried out session.
Should be noted that since this moment wireless terminal 103 are terminals of supporting H.323, so it does not need to pass through IWF 305 with the fixing H.323 session between the terminal 303.Promptly this moment, multimedia server 10 directly linked to each other with gatekeeper 301.
The transmission course that H.323 terminal 103 that this moment is wireless and fixing H.323 terminal are carried out media stream comprises:
At first, H.323 wireless terminal connects with fixing H.323 terminal by multimedia server 10.
Certainly, this process that connects also comprises call establishment, ability assignment procedure and opens the logic channel process.
After connecting, just can carry out the transmission of multimedia messagess such as audio frequency, video and data for example in wireless H.323 terminal 103 and fixing H.323 terminal.
Do not break away from design of the present invention and scope and can make many other changes and remodeling.Should be appreciated that to the invention is not restricted to specific execution mode, scope of the present invention is defined by the following claims.
Claims (12)
1. multimedia server, it can be configured to session initiation protocol (SIP) server or gatekeeper H.323, comprising:
Control device is used to provide the conversation control function of dialogue-based initiation protocol or based on the CCF of agreement H.323;
Protocol interface device is used to provide H.323 interface and session initiation protocol interface function, and this protocol interface device and described control device have the exchange of data flow; And
The service management device is used to provide and professional relevant management function or interface, and this service management device and described control device have the exchange of data flow.
2. according to the multimedia server of claim 1, wherein said protocol interface device provides following one or multinomial interface function: signalling system No.7 interface, H.248 interface, internet device control protocol interface and MGCP interface.
3. according to the multimedia server of claim 1, wherein said service management device also provides following one or multinomial interface or function: operation management maintain function or interface, VPN management function or interface, orientation management function or interface, authentication and authorization charging function or interface and applications insert or interface.
4. multimedia server according to claim 1 wherein also comprises protocol conversion apparatus, is used for the conversion between different agreement, and this protocol conversion apparatus can have the exchange of data flow with described control device and/or described protocol interface device.
5. method of carrying out multimedia transmission between the session initiation protocol wireless terminal comprises step:
Described session initiation protocol wireless terminal is registered in each described multimedia server in according to claim 1-4;
Caller session initiation protocol wireless terminal each described multimedia server in according to claim 1-4 sends call request, by the latter legitimate verification is carried out in this call request, when checking by and when finding called session initiation protocol wireless terminal, to called transmission call request;
After called session initiation protocol wireless terminal was received described call request, each described multimedia server carried out call answering in according to claim 1-4, and by the latter this call answering is sent to caller;
Between described session initiation protocol wireless terminal, carry out the transmission of media stream.
6. method of carrying out transmission of multimedia streams between session initiation protocol wireless terminal and session initiation protocol fixed terminal comprises step:
Described session initiation protocol wireless terminal is registered in each described multimedia server in according to claim 1-4;
By according to each described multimedia server among the claim 1-4, between described session initiation protocol wireless terminal and session initiation protocol fixed terminal, carry out call establishment;
After above-mentioned call establishment is finished, between described session initiation protocol wireless terminal and session initiation protocol fixed terminal, carry out the transmission of media stream.
7. according to the method for claim 6, wherein also comprise step:
By according to each described multimedia server among the claim 1-4, between described session initiation protocol wireless terminal and session initiation protocol fixed terminal, carry out the call tear down process.
8. a session initiation protocol wireless terminal is participated in the H.323 method of the video conference of network, comprises step:
Described session initiation protocol wireless terminal is registered in each described multimedia server in according to claim 1-4;
Described session initiation protocol wireless terminal according to each described multimedia server among the claim 1-4, sends message that request enter video conference to the interconnecting gateway functional part by described;
Described interconnecting gateway functional part carries out protocol conversion to the message of this request, to connect with multipoint control unit;
After connecting foundation, described interconnecting gateway functional part receives media stream from described session initiation protocol wireless terminal, through behind the transcoding this media stream is sent to described multipoint control unit.
9. method according to claim 8 wherein also comprises step:
Described interconnecting gateway functional part receives media stream from described multipoint control unit, through behind the transcoding this media stream is sent to described session initiation protocol wireless terminal.
10. method according to claim 8, wherein said interconnecting gateway functional part and multipoint control unit connect and comprise the steps:
The call setup step is used for setting up between described interconnecting gateway functional part and multipoint control unit and calls out
Ability is set step, is used for determining employed ability;
Open the logic channel step, be used to carry out the transmission of media stream.
11. one kind H.323 wireless terminal and fixed terminal H.323 carry out the method for transmission of multimedia streams, comprise step:
Described H.323 wireless terminal is registered in each described multimedia server in according to claim 1-4;
Described H.323 wireless terminal is set up calling by according to each described multimedia server among the claim 1-4 with described H.323 fixed terminal;
Carry out the transmission of media stream at described H.323 wireless terminal and fixed terminal H.323.
12. a session initiation protocol wireless terminal, it adopts the encryption algorithm of the code check that is suitable for wireless channel.
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| WO2010148744A1 (en) * | 2009-12-11 | 2010-12-29 | 中兴通讯股份有限公司 | System and method for service management based on m2m |
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