CN102035830A - 3G (The 3rd Generation Telecommunication) multimedia dispatching control system - Google Patents
3G (The 3rd Generation Telecommunication) multimedia dispatching control system Download PDFInfo
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Abstract
The invention relates to a 3G (The 3rd Generation Telecommunication) multimedia dispatching control system, belonging to the field of dispatching control systems. The 3G multimedia dispatching control system comprises a 3G public network, a dispatching platform, an access switch, a core switch, a core access gateway, a management terminal set, multimedia terminal equipment, an ip (Internet Protocol) telephone server and a duplex intercom server, which form a stable architecture to realize simultaneous mass duplex clustering intercom without limits on space and distance, and the mass duplex clustering intercom is clear and noiseless in call quality which is the same to that of a telephone, and also has the functions of video transmission, personnel location, dispatching sound recording, and mobile conference; and meanwhile, the system can realize zero-charge communication, ensures the synchronization of work and communication and safety guarantee, and has wide application range.
Description
Technical field
The present invention relates to a kind of dispatching and command system, relate in particular to a kind of 3G multimedia dispatching and command system.
Background technology
At present, in the rescue process of various contingencies and natural calamity,, except increasing manpower and goods and materials, a comprehensive coordination commander's system must be arranged also in order to improve the efficient of rescue.Present dispatching and command system mainly utilizes meanss of communication such as mobile phone to pass on various information, but communication tools such as mobile phone tend to be subjected to weather, the geographical position, all multifactor influences such as expense height, and communication tool such as mobile phone can only one-side reaction voice messaging, the cammander can only carry out Analysis of Policy Making by sounding understanding field condition, the order that so often causes the cammander to assign lacks accuracy, promptness, fail safe realizes easy and simple to handle so press for a kind of rescue that is used for of research and development, air time is long, sound clarity, no telephone expenses, simple visual remote-wireless communication device is the dispatching and command system on basis.
Mobile communication technology has developed since rising always at a gallop, has experienced the three generations at present.First generation mobile communication system originates from the eighties in 20th century, and what mainly adopt is analogue technique and frequency division multiple access (FDMA) technology, owing to be subjected to the restriction of transmission bandwidth, having caused its most fatal shortcoming is to carry out the long-distance roaming of mobile communication.Second generation mobile communication system (2G) originates from phase early 1990s, and what mainly adopt is the time division multiple access (TDMA) and code division multiple access (CDMA) technology of numeral, and this system realizes business such as voice-and-data with digital transmission mode.3-G (Generation Three mobile communication system) (3G) development is quickened, and has realized " whole world unified standard, unified frequency range, global seamless roam " substantially, the capability goal of the technology of " spectrum efficiency height " and " mobile multi-media service ".Shang Yong WCDMA has realized 384kbps, and cdma2000 1X has then realized user rate average out to 50kbps～97kbps, and 1XEV/DO has realized the user rate of average 500kbps.The speed of GPRS realization at present is 30kbps～40kbps.The experimental system of TD-SCDMA has realized the speed of 148kbps.It can provide preceding two generation the product various wide-band-message business that can not provide, such as high-speed data, image, television image etc. at a slow speed.
Wireless signal four-wire system duplex transmission technology makes to send with acceptance separates fully, with make a phone call the same, more easy to use than semiduplex intercom.The transmission of data and reception shunting are transmitted by the different transmission line of two-way respectively, and communicating pair can both send and receive operation at synchronization, and load mode is a full duplex system.Under full duplex mode, each end of communication system all is provided with transmitter and receiver, therefore, can transmit on both direction simultaneously by control data.Full duplex mode need not the switching of travel direction, the time delay that does not therefore have handover operation and produced, and this is very favourable to the interactive application (for example remote monitoring and control system) that can not incur loss through delay if having time.This mode requires communication two party that transmitter and receiver are all arranged, and needs 2 paths data signal simultaneously, four-wire system transmission just.
The digital communication technology antijamming capability is strong, and the information in the digital communication was included among having or not of pulse, as long as absolute value of noise is no more than a certain threshold value, receiving terminal just can be differentiated having or not of pulse, to guarantee the reliability of communication; And the digital communication technology long-distance transmissions still can be ensured the quality of products, because digital communication is to adopt regenerative relay system, can abate the noise, the digital signal of regeneration is the same with original digital signal, can continue transmission goes down, communication quality just is not subjected to the influence of distance like this, can carry out telecommunication in high quality.In addition, it also has the various communication service requirements (as phone, telegram, image, data etc.) of adaptation, is convenient to realize unified integrated services digital network, is convenient to adopt large scale integrated circuit, be convenient to realize encryption, be convenient to realize the advantages such as computer management of communication network.
The ultra-high sensitive signal reception technique of-100dBm can solve common bluetooth communication can only transmit tens meters apart from bottleneck problem, will accept thresholding to be reduced to-below the 100dBm, realized the remote transmission of sound arrowband.So-called threshold effect, exactly after the input signal-to-noise ratio of envelope detector is reduced to a specific numerical value, a kind of phenomenon of rapid deterioration appears in the output signal-to-noise ratio of wave detector, the input signal-to-noise ratio that begins to occur threshold effect is called threshold value, and this threshold effect is that the non-linear demodulation effect by envelope detector causes.Under little state of signal-to-noise, modulation signal can't separate with noise, and useful signal is submerged among the noise, and this moment, the wave detector output signal-to-noise ratio was not pari passu along with input signal-to-noise ratio descends, but threshold effect has just appearred in rapid deterioration.
Frequency hopping (Frequency-Hopping Spread Spectrum; FHSS) carrier frequency that operation principle is meant the receiving-transmitting sides transmission signals is carried out the communication mode of Discrete Change according to predetermined rule, that is to say, the carrier frequency of using in the communication is subjected to pseudorandom to change the control of sign indicating number and random jump.From the implementation of the communication technology, " frequency hopping " is a kind ofly to carry out the frequency shift keyed communication mode of multifrequency with a sign indicating number sequence, also is the communication system of a kind of yard control carrier frequency saltus step.On time domain, Frequency Hopping Signal is a multifrequency frequency shift keyed signals; From frequency domain, the frequency spectrum of Frequency Hopping Signal be one on broadband very with the unequal interval random jump.Wherein: frequency hopping controller is a core component, comprise frequency hopping pattern produce, synchronously, function such as adaptive control; Synthetizer is synthetic required frequency under the control of frequency hopping controller; Data terminal comprises carries out error control to data.It is compared with fixed communication frequently.More hidden also being difficult to of frequency hopping communications intercepted and captured, and has good antijamming capability, even there is the part frequency disturbed, still can communicate by letter normally on other not disturbed frequencies.Because frequency-hopping communication system is instantaneous narrowband systems, it is easy to the narrow-band communication system compatibility with other, that is to say, frequency hopping radio set can with radio station, the arrowband intercommunication of routine, help the renewal of equipment.Frequency hopping is one of the most frequently used spread spectrum mode, also is widely used in a plurality of fields such as GSM, WLAN (wireless local area network), indoor wireless communication, satellite communication, subsurface communication, radar, microwaves.
2.4GHz wireless technology is a kind of short range wireless transmission technology, has bandwidth height (2Mbps), transmitted in both directions, strong interference immunity, long transmission distance (short distance wireless technical scope), the advantage of little power consumption.As everyone knows, 900M is the public network frequency range, can realize transmitting signal by public base station, and 1.8G is the standby frequency range of public network double frequency, and the 2.4G frequency range is the common ISM band in countries in the world, need not the application permission, the free use.
In data communication system or the computer network system, the bandwidth of transmission medium or capacity often surpass the demand of the single signal of transmission, in order to effectively utilize communication line, wish that a channel transmits multiple signals simultaneously, Here it is so-called multiplexing technique (MultiplexiI1g).Adopt multiplexing technique to get up a plurality of signal combination and on a physical channel, transmit, when long-distance transmissions, can save the installation and maintenance expense of cable greatly.
Summary of the invention
The technical problem to be solved in the present invention be overcome in the present dispatching and command system information exchange untimely, can't allocate in real time, communication effect is of poor quality, the expense height, can not intuitively reflect the problem of on-the-spot real conditions provides a kind of 3G multimedia dispatching and command system.
For addressing the above problem, technical scheme of the present invention is: a kind of 3G multimedia dispatching and command system, be used for the remote scheduling commander, and this system comprises:
One 3G public network;
Dispatching platform: comprise computer and phone that scheduler program is housed, be connected with core switch that the function of dispatching desk is the issue that the operator carries out gathering of information and analyzes and make a strategic decision by dispatching desk by access switch;
Access switch: be connected with dispatching platform, two-way intercommunication server, IP phone server, be used for the exchanges data of dispatching platform, two-way intercommunication server, IP phone server and core switch;
Core switch: be connected with access switch,, provide bidirectional data exchange, data sync and backbone transport structure by transmitting communication data stream at a high speed;
Core IAD: be connected with access switch, the duplex high speed data communication interface be provided, realize seamless data link from the 3G public network to dispatching and command system;
The office terminal machine: for the hypervisor computer is housed, be connected with access switch, its hypervisor has dispatching patcher highest weight limit, coordinated management command system authorities at different levels;
Multimedia terminal equipment: function is to receive and send voice and video information;
The ip telephony server: be connected with access switch, management distributes phone IP, realizes that many people converse simultaneously;
Duplex intercommunication server: be connected with access switch, handle receiving data and sending data, realize wireless signal four-wire system duplex transmission.
Further, described multimedia terminal equipment comprises terminal, development board, R-T unit, and described terminal comprises microphone, earphone, camera, display; Development board directly provides interface to terminal, and microphone, earphone are respectively audio frequency input, output interface, and camera is a USB interface, and display is a winding displacement; Various initial data are through being sent, received by dispensing device after the processor processing.This multimedia terminal equipment can be installed on the safety cap simultaneously.
The invention has the beneficial effects as follows: adopt this 3G multimedia dispatching and command system, can realize not having the thousand people duplexing cluster intercommunication simultaneously of space and distance limit, call tone quality with say that phone is the same and know no noise.Also possess video transmission, personnel positioning, scheduling recording, mobile conferencing function; Simultaneously can realize 0 rate communication, work and communication are carried out synchronously, ensure safety; And the native system scope of application is extensive.
Description of drawings
Fig. 1 is the configuration diagram of 3G multimedia dispatching and command system of the present invention.
Fig. 2 is the multimedia terminal structure chart.
Embodiment
A kind of 3G multimedia dispatching and command system as shown in Figure 1 comprises at least one multimedia terminal equipment 10; A 3G public network 20 is used for propagation of wireless signal, and realizes the seamless data link of 3G public network to dispatching and command system by core IAD 30; Be provided with dispatching platform 90, duplexing intercommunication server 80, ip telephony server 70, office terminal 60 in command centre, they can be connected with core switch 50 by access switch 40 separately, core switch can be transmitted communication data stream at a high speed, thereby provides bidirectional data exchange, data sync to form reliable backbone transport structure.
Wherein duplexing intercommunication server has adopted wireless signal four-wire system duplex transmission treatment technology.
Dispatching platform is made up of some computers 91 and phone 92.The staff of command centre can pass through their issue an orders and analytical information.
The office terminal is a computer that hypervisor is housed.This hypervisor can be coordinated the work of whole command system, various authority settings also are provided, group busy, function such as broadcasting.
What access switch used is the switch device that the port of a plurality of 10M/100M/1000M of having adaptive abilities can be provided.
The core IAD is based on the ip voice of 3G data protocol, the multimedia of data/facsimile service inserts switching equipment.
Multimedia terminal equipment is made up of terminal, development board, R-T unit as shown in Figure 2, and described terminal comprises microphone, earphone, camera, display; Development board directly provides interface to terminal, and microphone, earphone are respectively audio frequency input, output interface, and camera is a USB interface, and display is a winding displacement; Various initial data are through being sent, received by dispensing device after the processor processing.This multimedia terminal adopted digital communication technology ,-the ultra-high sensitive signal of 100dBm receives, frequency hopping, guaranteed that stablizing of conversation is pure and fresh, this multimedia terminal equipment can be installed on the safety cap simultaneously, thereby realizes the function of edge work limit conversation, the job security of reinforcement.
Claims (3)
1. a 3G multimedia dispatching and command system is used for the remote scheduling commander, and this system comprises:
One 3G public network;
Dispatching platform: comprise computer and phone that scheduler program is housed, be connected with core switch that the function of dispatching desk is the issue that the operator carries out gathering of information and analyzes and make a strategic decision by dispatching desk by access switch;
Access switch: be connected with dispatching platform, two-way intercommunication server, IP phone server, be used for the exchanges data of dispatching platform, two-way intercommunication server, IP phone server and core switch;
Core switch: be connected with access switch,, provide bidirectional data exchange, data sync and backbone transport structure by transmitting communication data stream at a high speed;
Core IAD: be connected with access switch, the duplex high speed data communication interface be provided, realize seamless data link from the 3G public network to dispatching and command system;
The office terminal machine: for the hypervisor computer is housed, be connected with access switch, its hypervisor has dispatching patcher highest weight limit, coordinated management command system authorities at different levels;
Multimedia terminal equipment: function is to receive and send voice and video information;
The ip telephony server: be connected with access switch, management distributes phone IP, realizes that many people converse simultaneously;
Duplex intercommunication server: be connected with access switch, handle receiving data and sending data, realize wireless signal four-wire system duplex transmission.
2. 3G multimedia dispatching and command system according to claim 1 is characterized in that: described multimedia terminal equipment comprises terminal, development board, R-T unit, and described terminal comprises microphone, earphone, camera, display; Development board directly provides interface to terminal, and microphone, earphone are respectively audio frequency input, output interface, and camera is a USB interface, and display is a winding displacement; Various initial data are through being sent, received by dispensing device after the processor processing.
3. 3G multimedia dispatching and command system according to claim 2 is characterized in that: described multimedia terminal equipment can be installed on the safety cap.
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Cited By (3)
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| CN106714113A (en) * | 2015-11-12 | 2017-05-24 | 成都鼎桥通信技术有限公司 | Broadband multimedia cluster system and communication method |
| CN111787270A (en) * | 2020-07-27 | 2020-10-16 | 国网河南省电力公司检修公司 | Intelligent management and control consultation and conference system and method based on positioning technology |
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