CN1049786C - Under-ground and obove-ground - Google Patents
Under-ground and obove-ground Download PDFInfo
- Publication number
- CN1049786C CN1049786C CN96109737A CN96109737A CN1049786C CN 1049786 C CN1049786 C CN 1049786C CN 96109737 A CN96109737 A CN 96109737A CN 96109737 A CN96109737 A CN 96109737A CN 1049786 C CN1049786 C CN 1049786C
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- ground
- underground
- website
- wireless
- wireless communication
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Abstract
The present invention relates to an overground and underground 'all day' wireless communication system which belongs to wireless communication equipment. The present invention aims at using the existing ground wireless communication system and the existing underground power lines or telephone lines and additionally increasing wired relay transmission station sites to form a wireless communication system. The system is composed of overground station sites, a wireless communication network, transmission lines for connecting the overground station sites and underground station sites, and a relaying subsystem for the wired relay transmission of underground multiple station sites. Each station site comprises a receiver, a transmitter and an automatic converting device for wired signals and wireless signals with the functions of demodulation, modulation, transmission and reception. The present invention has the advantages of wide application and convenient use, and after being used, the system has obvious effect.
Description
The invention belongs to wireless telecommunications system.
At present, the terrestrial wireless communication such as beeper, intercom and radio telephone (promptly being commonly called as mobile telephone), is popularized.Yet because of the stratum is a good conductor, radio wave can not penetrate first; Moreover locate such as subway, mine, mansion basement etc., because of the stratum absorbs electric wave and the characteristics of radio wave straight line transmission, cause and adopt present terrestrial wireless communication system, be difficult to realize above and below ground accessible " round-the-clock " wireless telecommunications
[1,2]Even utilize the ground intercom of power line transmission
[3,4,5], also can only can be regarded as the mutation of telephone.Therefore, solve the task of top priority in the wireless telecommunications of above and below ground " wait entirely in the sky ".See also list of references:
1. the Wan-hai gull is edited, mobile communication equipment atlas and guide, Beijing: Electronic Industry Press, 1991, PP18-27.
Wei volume such as core white, up-to-date hand-held station intercom principle is used and maintenance, Foochow: Fujian science tech publishing house, 1991, chapter 1, radio hand-held station intercom principle.
3. Liu Wen China, power line carrier speakerphone, radio, 3,1994, PP33,34.
4. the Shen book is bright, four-way power line carrier intercom, radio, 9,1994, PP34-35.
5. Chen Yuan is quick, multichannel wired intercom, modern communications, 12,1996, P21.
The object of the invention is to utilize existing terrestrial wireless communication system and underground existing power line or telephone wire, additional wired relay transmission website and the under-ground and obove-ground that constitutes.
The present invention seeks to realize like this:
A kind of above and below ground wireless telecommunication system comprises the wireless telecommunications net, it is characterized in that also comprising ground website, underground website, transmission line, reaches above and below ground wireless telecommunications net; Transmission line connects the wireless interface receiver and the radio transmitter interface of a certain website of underground each website and ground.
Described transmission line is power line, telephone wire or industrial siding;
Described website comprises that demodulation, the modulation of receiver, transmitter and the transmission of solution above and below ground reach and wired and wireless signal automatic transfer equipment; The receiver of certain website and underground each website is connected the wireless interface receiver and the radio transmitter interface of conversion equipment with transmitter on the ground, connects transmission line again.
In conjunction with the accompanying drawings, further specify content of the present invention.
Fig. 1 system block diagram of the present invention
Fig. 2 website block diagram of the present invention
Square frame among Fig. 1 represents website; The thick black line that the above and below ground is communicated with Transmission line, existing telephone wire for example, lamp cord etc. Elongated oval generation The terrestrial wireless communication network of table commencement of commercial operation.
After website receives wireless signal on the ground, earlier modulation intelligence is extracted Come out, remove again to modulate the IF carrier of new generation, the IF carrier after the modulation Amplify to send in the transmission line through frequency-selecting and transmit. Other underground certain Individual website is received IF carrier and is carried this modulation intelligence that comes and extract earlier Come the identical radio frequency of receiving with ground station that goes again to modulate new generation Carrier wave, the radio-frequency carrier after the modulation be through frequency-selecting amplification and countdown circuit, Deliver to commercially available emitter and launch, so, undergroundly close on this website place just Received the wireless signal of the same frequency of sending on the ground.
The like, underground certain website also can receive underground Certain frequency wireless signal becomes the wire signal of IF carrier modulating wave, send Enter in the transmission line to carry. Arrived ground station, this wire signal is extracted, And remove to modulate the radio-frequency carrier of new generation, the carrier signal after the modulation is sent again Launch again with the carrier wave of the identical frequency of original wireless signal to commercially available emitter The user goes out, so just can receive underground user's wireless signal on the ground. Certainly, also can carry out wireless signal transfer between the underground website.
Transmission line can transmit the multifrequency point multiple signals and not interfere with each other. Cause Be pipeline and the mansion basements such as underground mine, subway, may turn round, Overslaugh wireless signal linear transmission needs to establish a plurality of websites under the old place. Logical Normal wire radio operating frequency is 100K-300KHz. Radiofrequency signal is adopted RF spot with the ground communication network.
Fig. 2 is site structure block diagram of the present invention. The frame of broken lines representative is wired With the wireless signal automatic transfer equipment, the round frame of top represents commercially available reception Machine, the round frame of below represents commercially available emitter. When receiver is received signal fW1, extract the modulation signal S of conveying by the wireless receiving interface1, such as speech signal, next square frame is delivered in this modulation, the IF carrier of new generation is modulated the intercarrier signal f after the modulationc1Amplify through frequency-selecting, send into transmission in the transmission line.
The wire signal f of other frequencyc2, amplify through frequency-selective amplifier, send Enter next square frame and carry out earlier the intermediate-freuqncy signal demodulation, go again to modulate new generation Radio-frequency carrier. This modulated RF carrier wave is used for the control emission, by not having Line transmitter interface circuit send commercially available emitter, with former wireless carrier frequency fW2To carry next signal S2 by IF carrier, send.
Advantage of the present invention:
1. be widely used, can be at subway, mine, and mansion basement etc. is located to use;
2. easy to use, realize above and below ground accessible " wait entirely in the sky " wireless telecommunications.
Embodiment 1
Receiver, the model of transmitter are commercially available TK208, and the intercom model is C150, and certain mansion basement is installed this system, use the electric light transmission line.Intercom sends information when the ground, through demodulation, modulation and transmission, delivers to underground website, and through demodulation, modulation and an emission, the information that another intercom at then underground any place all can be uploaded with receiving realizes above and below ground " round-the-clock " communication again.Otherwise, when underground intercom sends information,, deliver to website on the ground by transmission line through demodulation, modulation and transmission, again through demodulation, modulation and emission, intercom on the ground also can receive the underground information that transmits.Through using 2 years, effect is obvious.
Embodiment 2
Certain mansion basement 1 floor has an intercom, and underground 3 layers have another intercom, and other conditions are with embodiment 1." round-the-clock " wireless telecommunications between same realization is underground.Through using 2 years, effect is obvious.
Claims (3)
1. an above and below ground wireless telecommunication system comprises the wireless telecommunications net, it is characterized in that also comprising ground website, underground website, transmission line, reaches above and below ground wireless telecommunications net; Transmission line connects the wireless interface receiver and the radio transmitter interface of a certain website of underground each website and ground.
2. according to the described wireless telecommunication system of claim 1, it is characterized in that described transmission line is power line, telephone wire or industrial siding;
3. according to the described wireless telecommunication system of claim 1, it is characterized in that described website comprises that demodulation, the modulation of receiver, transmitter and the transmission of solution above and below ground reach and wired and wireless signal automatic transfer equipment; The receiver of certain website and underground each website is connected the wireless interface receiver and the radio transmitter interface of conversion equipment with transmitter on the ground, connects transmission line again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96109737A CN1049786C (en) | 1996-09-10 | 1996-09-10 | Under-ground and obove-ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96109737A CN1049786C (en) | 1996-09-10 | 1996-09-10 | Under-ground and obove-ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1148312A CN1148312A (en) | 1997-04-23 |
| CN1049786C true CN1049786C (en) | 2000-02-23 |
Family
ID=5120565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96109737A Expired - Fee Related CN1049786C (en) | 1996-09-10 | 1996-09-10 | Under-ground and obove-ground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1049786C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE357090T1 (en) | 1998-06-24 | 2007-04-15 | Sk Telecom Co Ltd | REPEATING DEVICE WITH TELEPHONE CONNECTION AND PERSONALIZED LINE |
| CN102710354A (en) * | 2012-04-20 | 2012-10-03 | 南京矿通科技有限公司 | Underground radio broadcasting system and control method thereof |
| CN105429671A (en) * | 2015-12-22 | 2016-03-23 | 通号通信信息集团上海有限公司 | Railway section communication system based on overhead contact line and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203018A (en) * | 1987-03-16 | 1988-10-05 | Kuixuan Han | Communications system |
| EP0462728A2 (en) * | 1990-06-18 | 1991-12-27 | Nortel Networks Corporation | Mobile communications |
-
1996
- 1996-09-10 CN CN96109737A patent/CN1049786C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2203018A (en) * | 1987-03-16 | 1988-10-05 | Kuixuan Han | Communications system |
| EP0462728A2 (en) * | 1990-06-18 | 1991-12-27 | Nortel Networks Corporation | Mobile communications |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1148312A (en) | 1997-04-23 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20000223 Termination date: 20110910 |