CN100521635C - Terminal cut-in control device and multimedia communication system based on Internet protocol - Google Patents
Terminal cut-in control device and multimedia communication system based on Internet protocol Download PDFInfo
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- CN100521635C CN100521635C CNB2004100701510A CN200410070151A CN100521635C CN 100521635 C CN100521635 C CN 100521635C CN B2004100701510 A CNB2004100701510 A CN B2004100701510A CN 200410070151 A CN200410070151 A CN 200410070151A CN 100521635 C CN100521635 C CN 100521635C
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Abstract
This invention discloses a terminal access control device including a local access module used accessing a terminal access control device by the local LAN multimedia terminal, a call control management module used in transferring network addresses and calling numbers to data packets of the multimedia terminal and selecting routes for data packets sent by the terminal to control its calling out and in, a network address transfer module for transferring the private network address and public network address, a wireless communication module for wirelessly accessing the control device into the public wireless network, a user identification module for identifying legal status a master control module for controlling the modules to finish data interaction.
Description
Technical field
The present invention relates to a kind of multimedia communication technology, especially a kind of terminal access control apparatus reaches the multimedia communications system based on Internet protocol.
Background technology
At present, based on perfect coding and the transmission that has realized voice of voice communication (VoIP, the Voice over Internet Protocol) technology of Internet protocol, and rely on its cheap price, lower maintenance cost and diversified application have obtained using widely in each enterprise.Wherein common communication protocol comprises following several:
H.323 protocol definition a kind of can applying in a flexible way in the communication mode of the equipment of multimedia conference call, be applicable to plurality of devices such as comprising video telephone, desktop computer and multimedia gateway.H.323 during design of protocol from the angle of terminal equipment, rather than from public switch telephone network (PSTN, Public SwitchedTelephone Network) internal unit is started with, therefore H.323 agreement with signalling system No.7 (SS7, Signaling System No7) there is bigger difficulty in the time of integrated, and not too is fit to large-scale application.
MGCP (MGCP, Media Gateway Control Protocol) numerous ip voice terminating gateways can be combined into an integral body that possesses interoperability, it is the combination of SGCP (SGCP, Simple Gateway Control Protocol) and IP device control protocol IPDC.MGCP is suitable for disposing large-scale application system.
Session initiation protocol (SIP, Session Initiation Protocol) is used for voice and video session initial, that manage and stop packet network, promptly provide a kind of both can be between terminal equipment and acting server, also can be to the method for gateway device call transmission control information.At present, SIP has obtained extensive use in the ip voice system.
More than three kinds of agreements be the interworking protocol of support ip voice system commonly used, be widely used in the voice communication system.
Multi-user PBX (PBX, Private Branch Exchange) is field digital or the analog telephone board that is used to connect private telephone network and public phone network, is mainly used in the expansion of enterprise network intercommunication phone extension set.And IP PBX system combines the PBX system and the ip voice technology of analog telephone, uses protocol transmission speech data, video data and instant note datas such as SIP.
Voice communication system commonly used in the existing enterprise is a kind of voice communication based on Internet protocol (VoIP) system, its core is an IP PBX system, IP PBX system realizes all or part of function of special-purpose PBX voice service with open data network packet technology, and is seamless integrated with existing data network.The function embodiment of IP PBX is its comprehensive to computer network and telephone exchange, in concrete use, needs IP PBX can ensure bandwidth, the speech quality of communication and higher communication security performance is provided.The IPPBX system mainly comprises:
The ip voice terminal, it comprises IP phone, the soft phone of PC, equipment such as SIP voice terminal, these equipment are different with common telephone set, directly insert data network, and do not use traditional telephone wire;
The communication server is hardware service applicator platform and the software kit thereof that carries out call control management;
The IP/PSTN gateway is the infrastructure element that connects ip voice terminal and network.
Present IP PBX system design does not require that based on distributed structure/architecture all equipment all is placed on same place, and its concrete network configuration is seen Fig. 1.The operation principle of IP PBX system is: when system receives one when mailing to the calling of ip voice terminal 15 by PSTN network 14, IP/PSTN gateway 12 is converted into the data packet format that meets Internet Protocol (IP) with the voice signal that receives, control according to the communication server 13, the ICP/IP protocol of use standard is given specific I P voice terminal 15 by the data packet transmission that enterprise's IP network 11 will meet Internet Protocol, subsequently, by this ip voice terminal 15 VoP that receives is decoded into continuous voice flow.
Existing IP PBX system forms the structure more complicated, and the installation and maintenance process is loaded down with trivial details, and needs to cooperate network layout that the ip voice terminal equipment is installed, and use occasion is restricted.While is according to the networking requirement of IP PBX system, all need to dispose the complete VoIP system of a cover for each local area network (LAN), thereby for the enterprise that a plurality of offices is arranged and each LAN is not combined, VoIP system obviously is very uneconomic for the network of each office is set up independently.
Also have a kind of voice communication system that has same application with VoIP system at present, be digital europe cordless telephone (DECT, Digital European Cordless Telephone) system, its system configuration as shown in Figure 2.The DECT system is the present maximum a kind of cordless telephone system of utilization, and regional mobility can be provided for the terminal use of PBX, for high density, among a small circle cordless communications system have defined general frame.
The DECT fixed system is by radio fixed part (RFP), and wireless controller (CC) is called out coded portion and supplementary service and partly formed; Radio fixed part provides the aerial physical interface that communicates with the DECT voice terminal in each coverage cell of DECT system; CC is responsible for handling the bottom business of one or more RFP; Call out coded portion and finish internal and external calling procedure and respective coding conversion work; Supplementary service partly provides center authentication, charging and mobile management function.
The DECT system is easy to use, but it is based on traditional cellular mobile telephone architecture, needs to install specific DECT fixed system and buying DECT voice terminal, and have certain difficulty aspect system extension.
Special-purpose PBX system has all been installed by present many enterprises, comprises that traditional use RJ11 interface connects the PBX of enterprises normal speech terminal and the IP PBX system of use standard I P procotol.The terminal of these two kinds of PBX systems all is subjected to the restriction of terminal wiring or IP network wiring, and the wiring expense is higher, and uses the shortcoming flexibility.The DECT cordless telephone system uses the DECT communication terminal, and more preceding two kinds of PBX systems are more flexible, but its autgmentability is not very desirable for large-scale application, and is therefore many in family's occasion use.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of terminal access control apparatus and based on the multimedia communications system of Internet protocol, so that the multimedia communications system of setting up can be broken away from the inconvenience that terminal connects up and the IP network wiring is brought, and make multimedia communications system have autgmentability preferably.
For addressing the above problem, the present invention proposes a kind of terminal access control apparatus, be used to control between the multimedia terminal of different local area network and carry out multimedia communication by the common wireless communication net, or the multimedia terminal of control local area network is linked into public telephone network by the common wireless communication net, or carry out multimedia communication between the different multimedia terminal in the control local area network, specifically comprise:
Local access module is used for the local area network multimedia terminal and inserts described terminal access control apparatus;
The call control management module, being used for multi-medium data bag to described multimedia terminal carries out the network address and calls out conversion between the code name, and the multi-medium data bag that send the local area network multimedia terminal carried out Route Selection, and the incoming call or the exhalation of the described multimedia terminal of control;
Network address conversion module is used for the private network address of multi-medium data bag and the conversion between the public network address;
Wireless communication module is used to make described terminal access control apparatus wireless access common wireless communication net;
Subscriber identification module is connected with described wireless communication module, is used for identifying the legal identity of described terminal access control apparatus at the common wireless communication net;
Main control module is connected with wireless communication module with described local access module, call control management module, network address conversion module respectively, is used to control that to finish multi-medium data between each module that self connects mutual.
Described terminal access control apparatus also comprises the voice quality administration module that is connected with described main control module, is used for the transmission quality of the VoP of management maintenance multimedia terminal transmission.
Described call control management module specifically comprises:
Call out the control submodule, be used for multi-medium data bag to the multimedia terminal and carry out the network address and call out conversion between the code name, and the multi-medium data bag that the multimedia terminal sends is carried out bandwidth control;
The call manager submodule, the multi-medium data bag that is used for the local area network multimedia terminal is sent carries out Route Selection, and the incoming call of control external multimedia terminal.
Correspondingly, the invention allows for a kind of multimedia communications system, comprising based on Internet protocol:
The multimedia terminal, being used for the Media Stream that receives encoded forms the multi-medium data bag and sends; Be used for receiving multimedia data bag and decoding formation Media Stream simultaneously;
The terminal access control apparatus is connected with described multimedia terminal, is used to control between the terminal of different local area network carry out multimedia communication by the common wireless communication net, or carries out multimedia communication between the different terminals in the control local area network.
Described system also comprises the IP phone gateway, be connected with public telephone network, be connected with described common wireless communication net by the internet simultaneously, be used for the multimedia terminal is converted to the data format that meets public telephone network by the terminal access control apparatus through the multi-medium data packet protocol that the common wireless communication net sends to the internet; Or be to send to the terminal access control apparatus by the common wireless communication net after meeting the data pack protocol of internet with the Data Format Transform of public telephone network.
Described IP phone gateway specifically comprises:
SGW is used for the signaling message of internet and the signaling in the public telephone network are changed;
Media gateway is used for the multi-medium data packet format of internet and the data format in the public telephone network are changed;
Media Gateway Controller is connected with media gateway with described SGW respectively, is used to control SGW and media gateway and finishes the signaling message between internet and the public telephone network and the conversion of data format.
Described terminal access control apparatus specifically comprises:
Local access module is used for the local area network multimedia terminal and inserts described terminal access control apparatus;
The call control management module, being used for multi-medium data bag to described multimedia terminal carries out the network address and calls out conversion between the code name, and the multi-medium data bag that send the local area network multimedia terminal carried out Route Selection, and the incoming call or the exhalation of the described multimedia terminal of control;
Network address conversion module is used for the private network address of multi-medium data bag and the conversion between the public network address;
Wireless communication module is used to make described terminal access control apparatus wireless access common wireless communication net;
Subscriber identification module is connected with described wireless communication module, is used for identifying the legal identity of described terminal access control apparatus at the common wireless communication net;
Main control module is connected with wireless communication module with described local access module, call control management module, network address conversion module respectively, is used to control that to finish multi-medium data between each module that self connects mutual.
Described terminal access control apparatus also comprises the voice quality administration module that is connected with described main control module, is used for the transmission quality of the VoP of management maintenance multimedia terminal transmission.
Described local access module is the RJ45 interface module, and described multimedia terminal is wired multimedia terminal, and described wired multimedia terminal is connected to described RJ45 interface module by wired mode; Or
Described local access module is a wireless network card, and described multimedia terminal is a wireless multimedia terminal, and described wireless multimedia terminal is connected to described wireless network card by wireless mode.
Terminal or the terminal for can simultaneously carry out voice and video communication of described multimedia terminal for carrying out voice communication.
Because it is that the multimedia communications system based on Internet protocol that core is set up supports wireless IP multimedia terminal or wired IP multimedia terminal to be linked into public telephone network by the common wireless communication net that terminal access control apparatus provided by the invention reaches with this device, can realize that also multimedia communication is carried out in the multimedia terminal in the local area network scope and multimedia communication is carried out in the multimedia terminal in a plurality of local area network scopes that connected by the common wireless communication net, therefore the multimedia communications system of setting up based on the IP agreement can not be subjected to the restriction of terminal wiring and the restriction of IP network wiring, should use more flexible;
The IP multimedia communications system that the present invention is simultaneously set up utilizes as the carrying entity of common wireless communication nets such as 2.5 generation/3 third generation mobile communication networks as the multimedia communication link, make a plurality of multimedia terminals can utilize single described terminal access control apparatus to use the common wireless communication net to carry out multimedia communication simultaneously, also can realize multimedia communication and multimedia terminal the multimedia communication a plurality of local area network scopes that by common wireless communication net connected in of multimedia terminal in the local area network scope, strengthen the extensibility of IP multimedia communications system.
On the other hand, because the present invention adopts the carrying entity of internet as IP multimedia service, rather than the enterprises lan that uses at present, therefore improve the utilance of IP phone gateway, reduced the construction cost of setting up the IP multimedia communications system.
Description of drawings
Fig. 1 is existing IP PBX system network architecture figure;
Fig. 2 is digital europe cordless telephone DECT system network architecture figure;
Fig. 3 is the theory diagram of terminal access control apparatus provided by the invention;
Fig. 4 is the topology diagram of the multimedia communications system based on Internet protocol provided by the invention;
Fig. 5 is the theory diagram of a kind of implementation of wired multimedia terminal;
Fig. 6 is the theory diagram of a kind of implementation of wireless multimedia terminal;
Fig. 7 is the theory diagram of IP phone gateway of the present invention.
Embodiment
The present invention has at first proposed a kind of terminal access control apparatus, so that this terminal access control apparatus wireless access can be passed through to the common wireless communication net in the multimedia terminal, and then is linked into public telephone network PSTN again by the common wireless communication net; Also can make the multimedia terminal in a plurality of local area network scopes that connected by the common wireless communication net, carry out multimedia communication.Terminal access control apparatus based on this design, the present invention and then proposed a kind of multimedia communications system again based on Internet protocol (IP), the establishment that can realize this IP multimedia communications system is not subjected to the restriction of terminal wiring and the restriction of IP network wiring, multimedia communication can be carried out, the multimedia communication of also can speaking based on the common wireless communication net and then with public telephone network PSTN in all multimedia terminals in a plurality of local area network scopes that connected by the common wireless communication net.
At first in conjunction with the accompanying drawings the concrete enforcement principle of terminal access control apparatus of the present invention is described in detail below; Consult Fig. 3, this figure is the theory diagram of terminal access control apparatus provided by the invention; This terminal access control apparatus provides the network insertion interface for the multimedia terminal in certain zone, and finishes the calling control and the call manager process of multimedia communication.
As shown in Figure 3, the terminal access control apparatus comprises local access module 25, call control management module 20, network address conversion module 21, wireless communication module 22, subscriber identification module 23, main control module 24, voice quality administration module 25; The contact of each module and act on as follows:
Call control management module 20, being used for multi-medium data bag to the multimedia terminal carries out the network address and calls out conversion between the code name, and the multi-medium data bag that send the local area network multimedia terminal carried out Route Selection, and the incoming call or the exhalation of control multimedia terminal; Call control management module 20 is mainly used in permission/refusal multimedia terminal and is linked into the terminal access control apparatus, and the multi-medium data bag that the multimedia terminal sent is carried out bandwidth control.
Network address conversion module 21 is used for the private network address (being the local area network (LAN) private IP address) of multi-medium data bag and the conversion between the public network address (public ip address); Promptly be used for the multimedia terminal when being connected to external network, change mutually between the data packet addressed with the LAN data packet address of local area network and outside public telecommunication network by the terminal access control apparatus.
Subscriber identification module 23 is connected with above-mentioned wireless communication module 22, is used for identifying the legal identity of described terminal access control apparatus at the common wireless communication net; Wherein subscriber identification module 23 can be the SIM card in the existing gsm mobile communication system, or is the UIM card in the CDMA mobile communication system, also can be usim card in the 3G (Third Generation) Moblie or the like.
Main control module 24 is connected with above-mentioned call control management module 20, network address conversion module 21, wireless communication module 22 and local access module 26 respectively, is used to control between each module that self connects finish data interaction.Main control module 24 is finished the function of the central processing unit CPU in the terminal access control apparatus.
In addition, in order to make terminal access control apparatus of the present invention have access performance preferably, the terminal access control apparatus can also and then comprise the voice quality administration module 25 that is connected with main control module 24, be used for the transmission quality of the VoP of management maintenance multimedia terminal transmission, and give VoP more bandwidth and littler time delay.
Wherein above-mentioned call control management module 20 and then can comprise and call out control submodule 201 and call manager submodule 202; Wherein:
Call out control submodule 201, be used for multi-medium data bag to the multimedia terminal and carry out the network address and call out conversion between the code name, and the multi-medium data bag that the multimedia terminal sends is carried out bandwidth control; Calling control submodule 201 is mainly used in and allows or refuse the multimedia terminal to be linked into the terminal access control apparatus;
In conjunction with the accompanying drawings the concrete enforcement principle of the multimedia communications system that the present invention is based on Internet protocol is described in detail again below; Consult Fig. 4, this figure is the topology diagram of the multimedia communications system based on Internet protocol provided by the invention, the multimedia communications system that the present invention is based on Internet protocol specifically comprises multimedia terminal, terminal access control apparatus 43, IP phone gateway 46, wherein the effect of each part is as follows:
Multimedia terminal (mainly including line multimedia terminal 41 and wireless multimedia terminal 42), being used for the Media Stream that receives encoded forms the multi-medium data bag and sends; Be used for receiving multimedia data bag and decoding formation Media Stream simultaneously; The multimedia terminal is meant the multimedia terminal that includes the ip voice protocol stack, the needs that can satisfy customer multi-media communication (are that voice communication can either be carried out in the multimedia terminal, also can carry out communication based on voice and video), and divide into wireless multimedia terminal 42 and wired multimedia terminal 41 according to user's access way.
Wired multimedia terminal 41 can be special-purpose wired IP phone, also can be the computer that Ethernet is connected to cable network that passes through that the VoIP soft hardware equipment is installed, and is listed as following method, though or realize the principles device identical with other forms with this example:
Consult Fig. 5, this figure is the theory diagram of a kind of implementation of wired multimedia terminal, wherein, wired multimedia terminal 41 is by micro-control unit 54, digital signal processing module 53, encoding and decoding speech module 52, phonetic entry output module 51, external equipment module 55, ethernet interface module 57 and ip voice convergence module 56 are formed; Each effect of forming module is as follows:
Phonetic entry output module 51 is used to realize the input and output of user speech stream;
Encoding and decoding speech module 52, be connected with phonetic entry output module 51, finish the modulus/digital-to-analogue conversion of voice signal, be about to phonetic entry output module 51 and import analog signal of voice into and be converted to the digital signal that is suitable for Network Transmission, or the digital signal that network is sent to is converted to analog voice signal carries out voice output through phonetic entry output module 51 again;
Digital signal processing module 53 is connected with encoding and decoding speech module 52, is responsible for the base-band digital voice signal is handled;
Ip voice convergence module 56 is connected with micro-control unit 54, and the audio digital signals after being responsible for handling carries out the IP protocol encapsulation, and guarantees the priority of ip voice signal in Network Transmission;
To converge the packet that contains voice messaging that carries out after IP encapsulates unit 56 through ip voice at last and be sent to terminal access control apparatus 43 through ethernet interface module 57;
Consult Fig. 6, this figure is the theory diagram of a kind of implementation of wireless multimedia terminal; One of implementation method of wireless multimedia terminal 42 is that its terminal can comprise: phonetic entry output module 61, encoding and decoding speech module 62, digital signal processing module 63, micro-control unit 64, external equipment module 65, ip voice convergence module 66, wireless network card 67 are formed.Wherein each effect of forming module is as follows:
Phonetic entry output module 61 is used to realize the input and output of user speech stream;
Encoding and decoding speech module 62, be connected with phonetic entry output module 61, be used to finish the modulus/digital-to-analogue conversion of voice signal, be about to the voice analog signal that phonetic entry output module 61 imports into and be converted to the digital signal that is suitable for Network Transmission, or the digital signal that network is sent to is converted to voice signal carries out voice output through phonetic entry output module 61 again;
Digital signal processing module 63 is connected with encoding and decoding speech module 62, is responsible for the base-band digital voice signal is handled;
Micro-control unit 64 is connected with digital signal processing module 63, external equipment module 65, ip voice convergence module 66, is used for the data interaction between each module is controlled;
External equipment module 65 is connected with micro-control unit 64, is used to connect external interface device, as can be used for connecting the external device such as LCD panel, keyboard of wireless multimedia terminal 42;
Ip voice convergence module 66 is connected with micro-control unit 64, and the audio digital signals after being responsible for handling carries out the IP protocol encapsulation, and guarantees the priority of ip voice signal in Network Transmission; To be sent to terminal access control apparatus 43 through wireless network card 67 through the packet that contains voice messaging that ip voice convergence module 66 carries out after IP encapsulates at last;
Wireless network card 67 converges unit 66 with ip voice and is connected, and is responsible for wireless multimedia terminal 42 and carries out radio communication with wireless mode and terminal access control apparatus 43.
Terminal access control apparatus 43 is connected with the multimedia terminal, if the multimedia terminal is a wireless multimedia terminal 42, then multimedia access control apparatus 43 is connected with wireless multimedia terminal 42 by wireless mode; If the multimedia terminal is wired multimedia terminal 41, then terminal access control apparatus 43 is connected with wired multimedia terminal 41 by wired mode, terminal access control apparatus 43 is used to control the multimedia terminal and is linked into public telephone network PSTN 47 by common wireless communication net 44, realize that perhaps the multimedia terminal carries out multimedia communication in the local area network scope, perhaps control the multimedia terminal and in a plurality of local area network scopes that connected by the common wireless communication net, carry out multimedia communication.。
Wherein the concrete composition of terminal access control apparatus 43 is no longer too much given unnecessary details here with above-mentioned specific descriptions to the terminal access control apparatus.
Consult Fig. 7, this figure is the theory diagram of IP phone gateway of the present invention, IP phone gateway 46 is one of equipment of realizing multimedia communications system provided by the present invention, can handle the basic call control of miscellaneous service, comprise call routing, management control, connect control (set up session and remove session), signalling interworking (as from the SS7 signaling to the IP agreement) etc.IP phone gateway 46 further comprises Media Gateway Controller 71, media gateway 72 and SGW 73; Wherein:
The multimedia communications system that the present invention is based on Internet protocol (IP) is linked into the terminal access control apparatus by the multimedia terminal that makes the user by wired or wireless mode, and then by terminal access control apparatus wireless access wireless communication system (as 2.5 generation/3 third-generation mobile communication nets etc.), realize that the terminal access control apparatus provides network insertion for the multimedia terminal in certain zone, and finish the calling control and the call manager process of multimedia communication, the concrete again and common wireless communication net of terminal access control apparatus communicates, as the data link by 2.5 generation/3 third-generation mobile communication nets, the digital speech information of multimedia terminal is transferred to the IP phone gateway that is arranged in the internet with the form of IP packet; The IP phone gateway links to each other with public switch telephone network PSTN, be responsible for handling the basic call control of miscellaneous service, realization comprises internetwork communications such as PSTN network, IP network, cno.1 signaling network, SS7 signaling network, ISDN, PRI, intelligent network, and finish authentication and mandate to the multimedia terminal, finish the address format conversion between the diverse network, management interface is provided; Simultaneously the terminal access control apparatus can realize that also the multimedia terminal carries out multimedia communication in the local area network scope; Perhaps control the multimedia terminal and in a plurality of local area network scopes that connected by the common wireless communication net, carry out multimedia communication
Here the present invention has been carried out detailed argumentation, but will be appreciated that, described only with the signal mode provided detailed description and instantiation, for one of ordinary skill in the art, thought of the present invention and range of application all obviously have various modifications or improvements.Therefore these declaratives should not be construed as the qualification to the present invention.
Claims (9)
1, a kind of terminal access control apparatus, be used to control between the multimedia terminal of different local area network and carry out multimedia communication by the common wireless communication net, or the multimedia terminal of control local area network is linked into public telephone network by the common wireless communication net, or carry out multimedia communication between the different multimedia terminal in the control local area network, specifically comprise:
Local access module is used for the local area network multimedia terminal and inserts described terminal access control apparatus;
The call control management module, being used for multi-medium data bag to described multimedia terminal carries out the network address and calls out conversion between the code name, and the multi-medium data bag that send the local area network multimedia terminal carried out Route Selection, and the incoming call or the exhalation of the described multimedia terminal of control;
Network address conversion module is used for the private network address of multi-medium data bag and the conversion between the public network address;
Wireless communication module is used to make described terminal access control apparatus wireless access common wireless communication net;
Subscriber identification module is connected with described wireless communication module, is used for identifying the legal identity of described terminal access control apparatus at the common wireless communication net;
Main control module is connected with wireless communication module with described local access module, call control management module, network address conversion module respectively, is used to control that to finish multi-medium data between each module that self connects mutual.
2, terminal access control apparatus according to claim 1 is characterized in that, also comprises the voice quality administration module that is connected with described main control module, is used for the transmission quality of the VoP of management maintenance multimedia terminal transmission.
3, terminal access control apparatus according to claim 1 and 2 is characterized in that, described call control management module specifically comprises:
Call out the control submodule, be used for multi-medium data bag to the multimedia terminal and carry out the network address and call out conversion between the code name, and the multi-medium data bag that the multimedia terminal sends is carried out bandwidth control;
The call manager submodule, the multi-medium data bag that is used for the local area network multimedia terminal is sent carries out Route Selection, and the incoming call of control external multimedia terminal.
4, a kind of multimedia communications system based on Internet protocol is characterized in that, comprising:
The multimedia terminal, being used for the Media Stream that receives encoded forms the multi-medium data bag and sends; Be used for receiving multimedia data bag and decoding formation Media Stream simultaneously;
The terminal access control apparatus is connected with described multimedia terminal, and be used to control between the terminal of different local area network carry out multimedia communication, or carry out multimedia communication between the different terminals in the control local area network by the common wireless communication net,
Described terminal access control apparatus specifically comprises:
Local access module is used for the local area network multimedia terminal and inserts described terminal access control apparatus;
The call control management module, being used for multi-medium data bag to described multimedia terminal carries out the network address and calls out conversion between the code name, and the multi-medium data bag that send the local area network multimedia terminal carried out Route Selection, and the incoming call or the exhalation of the described multimedia terminal of control;
Network address conversion module is used for the private network address of multi-medium data bag and the conversion between the public network address;
Wireless communication module is used to make described terminal access control apparatus wireless access common wireless communication net;
Subscriber identification module is connected with described wireless communication module, is used for identifying the legal identity of described terminal access control apparatus at the common wireless communication net;
Main control module is connected with wireless communication module with described local access module, call control management module, network address conversion module respectively, is used to control that to finish multi-medium data between each module that self connects mutual.
5, the multimedia communications system based on Internet protocol according to claim 4, it is characterized in that, also comprise the IP phone gateway, be connected with public telephone network, be connected with described common wireless communication net by the internet simultaneously, be used for the multimedia terminal is converted to the data format that meets public telephone network by the terminal access control apparatus through the multi-medium data packet protocol that the common wireless communication net sends to the internet; Or be to send to the terminal access control apparatus by the common wireless communication net after meeting the data pack protocol of internet with the Data Format Transform of public telephone network.
6, the multimedia communications system based on Internet protocol according to claim 5 is characterized in that, described IP phone gateway specifically comprises:
SGW is used for the signaling message of internet and the signaling in the public telephone network are changed;
Media gateway is used for the multi-medium data packet format of internet and the data format in the public telephone network are changed;
Media Gateway Controller is connected with media gateway with described SGW respectively, is used to control SGW and media gateway and finishes the signaling message between internet and the public telephone network and the conversion of data format.
7, according to claim 4,5 or 6 described multimedia communications systems based on Internet protocol, it is characterized in that, described terminal access control apparatus also comprises the voice quality administration module that is connected with described main control module, is used for the transmission quality of the VoP of management maintenance multimedia terminal transmission.
8, according to claim 4,5 or 6 described multimedia communications systems, it is characterized in that based on Internet protocol,
Described local access module is the RJ45 interface module, and described multimedia terminal is wired multimedia terminal, and described wired multimedia terminal is connected to described RJ45 interface module by wired mode; Or
Described local access module is a wireless network card, and described multimedia terminal is a wireless multimedia terminal, and described wireless multimedia terminal is connected to described wireless network card by wireless mode.
9, the multimedia communications system based on Internet protocol according to claim 4 is characterized in that, terminal or the terminal for can simultaneously carry out voice and video communication of described multimedia terminal for carrying out voice communication.
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| CNB2004100701510A CN100521635C (en) | 2004-08-04 | 2004-08-04 | Terminal cut-in control device and multimedia communication system based on Internet protocol |
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| CNB2004100701510A CN100521635C (en) | 2004-08-04 | 2004-08-04 | Terminal cut-in control device and multimedia communication system based on Internet protocol |
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| WO2006094433A1 (en) * | 2005-03-08 | 2006-09-14 | Zte Corporation | A ip multimedia subsystem for incorporating fixed access |
| US8472315B2 (en) * | 2008-02-07 | 2013-06-25 | Belair Networks Inc. | Method and system for controlling link saturation of synchronous data across packet networks |
| CN101605357B (en) * | 2009-07-01 | 2012-07-04 | 杭州华三通信技术有限公司 | Method for accessing public switched telephone network by wireless network device and wireless network device |
| CN101815143B (en) * | 2010-01-06 | 2012-08-29 | 北京讯鸟软件有限公司 | Real-time guaranteeing method of IP soft call voice and video stream media |
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