CN101136147B - Wireless communication and group net experiment system thereof - Google Patents
Wireless communication and group net experiment system thereof Download PDFInfo
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- CN101136147B CN101136147B CN2007100703469A CN200710070346A CN101136147B CN 101136147 B CN101136147 B CN 101136147B CN 2007100703469 A CN2007100703469 A CN 2007100703469A CN 200710070346 A CN200710070346 A CN 200710070346A CN 101136147 B CN101136147 B CN 101136147B
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Abstract
The teaching apparatus is a wire-less communication network experiment system, which comprises a GSM/CDMA mobile communication terminal experiment box, a GSM/CDMA base-station experiment box, a computer connected with the GSM/CDMA base-station experiment box and fitted with application software, a kernel exchanger star-shape topologically connected with GSM/CDMA base-station experiment box and a computer connected with the kernel exchanger and fitted with management system software. The experiment system adopts software and hardware to cooperate, experiment course is very visual, and operation is flexible and simple, which can be used for experiments relative to courses such as mobile communication, computer network or Ethernet.
Description
Technical field
The present invention relates to a kind of teaching equipment, especially a kind of cordless communication network experimental system.
Background technology
At present, maintain sustained and rapid growth in mobile communication, mobile communications network is when 3G drive ons boldly comprehensively, WLAN (is the abbreviation of WirelessLAN, be WLAN (wireless local area network)), WiMAX (being the wideband wireless access), UWB (being ultrawideband) and Zigbee new wireless access wide band technology and short distance wireless technicals such as (being the wireless communication technology of short distance low transmission data rate) emerge in large numbers in succession, the wireless communication industry development presents diversified new frame.
Wireless near field communication causes attention more and more widely just gradually.Low-power consumption, microminiaturization are the especially an urgent demand and the key issues of portable product of current wireless communication products.A key issue of radio communication is a reliability of data transmission, and this depends on all multifactor, and as frequency selection, co-channel interference, transmission range, day line options etc., these all will think better of and compare when the design wireless communication system.
Fast development along with mobile communication, each colleges and universities has offered course such as " mobile communication ", " spread spectrum communication ", " computer network " in succession and the experimental facilities supporting with it can not satisfy the requirement of teaching, and the teaching equipment that presses for a kind of new type digital, system perfecting satisfies the needs of teaching.
Summary of the invention
The objective of the invention is in order to provide a kind of and be applicable to the cordless communication network experimental system of the needs of courses such as " mobile communication ", " spread spectrum communication ", " computer network ".
For realizing purpose of the present invention, this instructions provides a kind of radio communication and group net experiment system thereof, comprises that GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box, the computing machine that application software is installed that connects GSM/CDMA base station experimental box, star topology connect the computing machine that management system software is installed of the core switch of GSM/CDMA base station experimental box, connection core switch.
GSM/CDMA mobile communication terminal experimental box comprises 2.4G radio-frequency module, baseband processing module, the programmable logic device (PLD) that integrates; Voice module, liquid crystal driver module, Keyboard Control module, microphone and the loudspeaker that is connected with this integrated circuit by interface and cable and be installed in the computer interface that being used on this integrated circuit is connected computing machine; The antenna that connects radio-frequency module.GSM/CDMA mobile communication terminal experimental box also comprises the LCD that connects liquid crystal driver module; The keyboard that connects the keyboard control module.
GSM/CDMA base station experimental box comprises 2.4G radio-frequency module, baseband processing module, ethernet link layer control module, the ethernet physical layer module that integrates; But the resetting memory, ROM (read-only memory), the voice module that are connected with this integrated circuit by interface and cable; And be installed in the computer interface and the Ethernet interface that is connected core switch that being used on this integrated circuit connects computing machine; The antenna that connects radio-frequency module.
This radio communication and group net experiment system thereof adopt the working method of software-hardware synergism, and experimentation is very directly perceived, and user's operation is more flexible simpler.This system teaching material of combining closely can be used for correlated curriculums experiments such as mobile communication, computer network, Principles of Modern Communication, also can carry out the experiment of Ethernet correlation technique.It adopts cordless communication network experimental system rf modulations, and transmission frequency is the open general frequency range of 2.4GHz of China, and output power is that 1mW and out-of-band radiation are less, need not the demand frequency licence.Because selecting the another one advantage of 2.4GHz frequency range is that wavelength is shorter, the size of antenna is less, volume that can reduction system, even Antenna Design can be realized that on pcb board antenna is built-in, can reduce the cost of system so simultaneously.The exchange of internal system The data ethernet frame format, interface rate can reach 100Mbps.Adopt the GSM/CDMA mobile communication terminal experimental box cell phone case of pure digi-tal speech processes, speech quality is more clear, can carry out the experiment of GSM/CDMA correlation technique.
The student can grasp following content after this experimental system is carried out Comprehensive Experiment: the PCM encoding and decoding; The ADPCM encoding and decoding; The base station encoding and decoding that interweave; Base station scrambler descrambling code; Base station M sequence produces and characteristics; Base station gold sequence produces and characteristics; Base station BPSK modulation; Base station QPSK modulation; Base station DS-CDMA coded demodulation; Handset call with answer; The numeral sending and receiving short messages; Signalling analysis; Ethernet is synchronous; Ethernet data receives and sends; Ethernet is packed and is unpacked; The understanding of ethernet frame format; Ethernet traffic control; Base station half-duplex mode of operation; Packet exchange; The full duplex work of switch; The networking of wireless communication system.
Purpose of the present invention, feature and advantage will be in conjunction with the embodiments, are further described with reference to accompanying drawing.
Description of drawings
Fig. 1 is the cut-away view of GSM/CDMA mobile communication terminal experimental box (mobile phone movable case);
Fig. 2 is that core switch is finished exchange control function synoptic diagram;
Fig. 3 is the cut-away view of GSM/CDMA base station experimental box;
Fig. 4 is radio communication and group net experiment system thereof figure.
Embodiment
With reference to last figure, provide following embodiment.To help to understand the present invention by embodiment, but not limit content of the present invention.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Embodiment: this radio communication and group net experiment system thereof comprise that GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box, the computing machine that application software is installed that connects GSM/CDMA base station experimental box, star topology connect the computing machine that management system software is installed of the core switch of GSM/CDMA base station experimental box, connection core switch.
GSM/CDMA mobile communication terminal experimental box comprises 2.4G radio-frequency module, baseband processing module, the programmable logic device (PLD) that integrates; Voice module, liquid crystal driver module, Keyboard Control module, microphone and the loudspeaker that is connected with this integrated circuit by interface and cable and be installed in the computer interface that being used on this integrated circuit is connected computing machine; The antenna that connects radio-frequency module.GSM/CDMA mobile communication terminal experimental box also comprises the LCD that connects liquid crystal driver module; The keyboard that connects the keyboard control module.
GSM/CDMA base station experimental box comprises 2.4G radio-frequency module, baseband processing module, ethernet link layer control module, the ethernet physical layer module that integrates; But the resetting memory, ROM (read-only memory), the voice module that are connected with this integrated circuit by interface and cable; And be installed in the computer interface and the Ethernet interface that is connected core switch that being used on this integrated circuit connects computing machine; The antenna that connects radio-frequency module.
This experimental system is made up of elements such as GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box and core switch, carries out the 2.4G wireless radiofrequency and sends, receives, Ethernet data exchange and resource management.GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box, core switch, background manage software are formed system, can carry out the mobile communication experiment.Reproduce compress speech coding and decoding, channel decoding, DS/CDMA coding and decoding, digital modulation and demodulation, radio frequency air interface, signaling exchange, route switching.Functions such as spreading code distribution, power control, multipath effect, mobile phone soft handover, Ethernet encoding and decoding, Ethernet processing protocol, computer communication network, network exchange.
GSM/CDMA mobile communication terminal experimental box is finished A/D, the D/A conversion of speech, speech coding and decoding, spread spectrum despreading, modulation (transmitting-receiving frequency 2.4GHz), wireless transmission and reception, air interface, control and management.GSM/CDMA mobile communication terminal experiment box hardware comprises: compositions such as microphone, loudspeaker, display screen and button, PC serial line interface, baseband processing module, RF sending/receiving module, voice module and antenna.
GSM/CDMA base station experimental box finish and 4 GSM/CDMA mobile communication terminal experimental boxs between wireless transmission and reception, modulation (transmitting-receiving frequency 2.4GHz), the spread spectrum despreading, channel decoding, and become the Ethernet data of industrial standard to be transferred to core switch the data-switching of despreading, the control of parameter and various interface and management, and the control of the exchange in the base station.The hardware of GSM/CDMA base station experimental box comprises: the compositions such as ethernet module of PC serial line interface, baseband processing module, RF sending/receiving module and antenna and industrial standard.
Adopt the Ethernet protocol (10M/100M adaptation function) of industrial standard and the Ethernet compatibility of practical application.Background manage software is finished the observation of various control informations.Analyze the message format and the channel architecture of various forward logic channels (pilot channel, synchronizing channel, paging channel, forward traffic channel) and reverse logic channel (access channel, reverse traffic channel).In background manage software, also comprise the control of system and management function (register, power monitoring shows in real time and soft handover control, transfer table are called out and the observation of base station call flow).
By GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box, core switch, background manage software is formed.The maximum system capacity of core switch can be expanded at most and connect 3 GSM/CDMA base station experimental boxs, and each GSM/CDMA base station experimental box can connect 4 GSM/CDMA mobile communication terminal experimental boxs (mobile phone movable case) at most.Whole radio communication and group net experiment system thereof can connect 12 GSM/CDMA mobile communication terminal experimental boxs (mobile phone movable case) at most.Any two GSM/CDMA mobile communication terminal experimental boxs (mobile phone movable case) in the system can both be conversed by base station (two mobile phone movable cases in same base station) or base station and core switch (at two mobile phone movable cases of different base station).System can provide session services (promptly 12 mobile phone movable cases can be set up talk business simultaneously) for 12 mobile phone movable cases simultaneously.
Claims (1)
1. radio communication and group net experiment system thereof is characterized in that: comprise that GSM/CDMA mobile communication terminal experimental box, GSM/CDMA base station experimental box, the computing machine that application software is installed that connects GSM/CDMA base station experimental box, star topology connect the computing machine that management system software is installed of the core switch of GSM/CDMA base station experimental box, connection core switch; Described GSM/CDMA mobile communication terminal experimental box comprises 2.4G radio-frequency module, baseband processing module, the programmable logic device (PLD) that integrates; Voice module, liquid crystal driver module, Keyboard Control module, microphone and the loudspeaker that is connected with this integrated circuit by interface and cable and be installed in the computer interface that being used on this integrated circuit is connected computing machine; The antenna that connects radio-frequency module; Described GSM/CDMA base station experimental box comprises 2.4G radio-frequency module, baseband processing module, ethernet link layer control module, the ethernet physical layer module that integrates; But the resetting memory, ROM (read-only memory), the voice module that are connected with this integrated circuit by interface and cable; And be installed in the computer interface and the Ethernet interface that is connected core switch that being used on this integrated circuit connects computing machine; The antenna that connects radio-frequency module.
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| CN2007100703469A CN101136147B (en) | 2007-07-26 | 2007-07-26 | Wireless communication and group net experiment system thereof |
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| CN2007100703469A CN101136147B (en) | 2007-07-26 | 2007-07-26 | Wireless communication and group net experiment system thereof |
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| CN101136147A CN101136147A (en) | 2008-03-05 |
| CN101136147B true CN101136147B (en) | 2011-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165014A (en) * | 2013-04-15 | 2013-06-19 | 南京航空航天大学 | Monitoring teaching demonstration method and system of internet-of-things-based discrete manufacturing workshop |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111341183A (en) * | 2020-04-20 | 2020-06-26 | 电子科技大学 | Display device driving technology test box |
| WO2022133928A1 (en) * | 2020-12-24 | 2022-06-30 | 华为技术有限公司 | Communication network and networking method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165014A (en) * | 2013-04-15 | 2013-06-19 | 南京航空航天大学 | Monitoring teaching demonstration method and system of internet-of-things-based discrete manufacturing workshop |
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