CN1337830A - Link transmission mode of radio paging system - Google Patents
Link transmission mode of radio paging system Download PDFInfo
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- CN1337830A CN1337830A CN 01124669 CN01124669A CN1337830A CN 1337830 A CN1337830 A CN 1337830A CN 01124669 CN01124669 CN 01124669 CN 01124669 A CN01124669 A CN 01124669A CN 1337830 A CN1337830 A CN 1337830A
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- cable
- catv
- paging
- radio paging
- link
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Abstract
The invention discloses a link transmission mode related to the new application of signal transmission mode. The character consists in that the link signal sent by the calling control center in the wireless calling system is transferred to each forwarding base stations through trunk transmission system of cable TV system and user distribution network. Comparing with present the trunking mode such as radio frequency relay, microwave relay and satellite link it provides merits of reasonable to use frequency resources, reliable transferring, strong interference killing feature and low cost.
Description
The present invention relates to the new application of cable TV (CATV) system in the radio paging system link transmission.
The transmission means of link mainly contains wireless radiofrequency relaying, microwave relay, satellite circuit (as VSAT) and special circuit in the radio paging system at present.Wherein the channel rent of microwave relay and satellite circuit and transmitting-receiving news equipment are relatively expensive, and special circuit is because each base station single line is pressed the line charge, and repeating base station overcharge more is many more; Less radio-frequency also is irrational from the angle of the utilization of resources.General rf frequency resource is used for fixing some the communication to transfer point (as mobile phone, intercom); Fixing point is to the communication of unlimited many transfer points (as radio broadcasting, paging); Relatively in the above two present radio paging links fixing point to the communication of limited quantity fixing point just seem uneconomical rationally.
The objective of the invention is to more effectively, more reasonably utilize frequency resource.According to different communication needs, select different transmission meanss, give full play to the speciality of various transmission systems.Utilize the link information of cable TV (CATV) system transmissions radio paging system.
The method according to this invention, in radio paging system, paging control centre is to the link information of each repeating base station, system carries out relay transmission by cable TV (CATV), concrete grammar is as follows: the front end that the digit pulse level signal of paging code and format device output is transferred to cable TV (CATV) system in the paging control centre of radio paging system, its transmission means can be directly transmission or after ovennodulation by special circuit or microwave relay or satellite circuit or less radio-frequency relay transmission to front end, select which kind of transmission means for use, take all factors into consideration which kind of mode and be easy to realize, the geographical position of the front end of paging control centre and cable television system and price factor.Front end in cable TV (CATV) system, the link signal that paging control centre is sent here be through modulation once more, and promptly being modulated on the radiofrequency signal again, trunk transmission system and the user's distribution network by cable TV (CATV) system transfers to each user side.The Channel Transmission mode of the link information of radio paging system in cable TV (CATV) system can be single channel or multiplexed.At last, the repeating base station of radio paging system obtains link information at the user side of cable TV (CATV) system through demodulation.If the minority repeating base station of radio paging system, not in the coverage of cable TV (CATV) system user distribution network, then can be from the paging control centre of the front end of cable TV (CATV) system or user side or radio paging system directly with special circuit or microwave relay or satellite circuit or less radio-frequency relaying to these other repeating base station transmission link information.
Brief Description Of Drawings.
Utilize the example of embodiment to be described in greater detail with reference to the attached drawings the present invention now, wherein:
Fig. 1 carries out the block diagram of relay transmission by cable TV (CATV) system for the link information of a radio paging system according to an embodiment of the invention.
Fig. 2 is the link information of a plurality of radio paging systems according to another embodiment of the invention carries out relay transmission by a cable TV (CATV) system a block diagram.
In the embodiment of Fig. 1, paging control centre 100 at radio paging system, the digit pulse level signal of paging code and format device 101 outputs, be modulated into audio FM through audio demodulator 102, audio demodulator 32 demodulation of delivering to by special circuit 200 in the front end 30 of cable TV (CATV) system are reduced into the digit pulse level signal, the digit pulse level signal of coming out with this demodulation is through exciter (radio-frequency modulator) 39 modulated radio signals again, both frequency shift keying (FSK), the effect of exciter (radio-frequency modulator) 39 is that the digit pulse level signal is modulated on the radiofrequency signal of assigned frequency, its output signal must meet the pertinent regulations of cable TV (CATV) system (among Fig. 1 in the front end 30,33 is processor channel, 34 is modulator, 35 for satellite receives, and miscellaneous equipment omits).Then this through the radiofrequency signal of ovennodulation through blender 31, after the radiofrequency signal mixing with other TV transmission program, trunk transmission system 40 and the user's distribution network 50 of sending into cable TV (CATV) system transfer to each user side, wherein, process optical sender 41 and optical receiver 42, trunk amplifier 43, spur amplifier 44 in trunk transmission system 40.Be noted that the primary transmission mode is an optical cable in this embodiment, same, the mode of the primary transmission of cable TV used herein (CATV) system also comprises coaxial cable and microwave line (MMDS).In user's distribution network 50, radiofrequency signal is sent to subscriber box 53 (54 are terminating resistance among Fig. 1) through distributor 51, splitter 52.The repeating base station 600 that is dispersed in radio paging system everywhere obtains after the radiofrequency signal of ovennodulation from subscriber box 53 everywhere, obtain the digit pulse level signal through radio-frequency transmitter 601, sending to paging receiver through radio frequency sending set 603 with this digit pulse level signal.
Fig. 2 is another embodiment.In this embodiment, three shared cable TVs of radio paging system (CATV) system is arranged, this embodiment is fit to the shared cable TV of any one above radio paging system (CATV) system certainly.In Fig. 2,110 is A paging control centre, and 120 is B paging control centre, and 130 is C paging control centre, the A here, B, C can be the paging control centres of three different paging centers, also can be the paging control centres of three different frequent points of a paging centers.In each paging control centre, earlier by separately paging code and format device 111,121 and 131 produce the digit pulse level signal, through audio demodulator 112 separately, 122 and 132 are modulated into audio FM, respectively by special circuit 201,202 and microwave relay link 800 deliver to the front end 30 of cable TV (CATV) system, use then these from the audio signal of different paging control centre through exciter (radio-frequency modulator) 36, the radiofrequency signal of 37 and 38 pairs of different frequencies is carried out frequency modulation(FM), deliver to blender 31 again, the next link signal of both a plurality of paging control centres adopts the mode of frequency multiplexing to transmit in a cable TV (CATV) system, after the radiofrequency signal of these different frequencies is mixed through blender 31 together with the radiofrequency signal of other TV transmission program, trunk transmission system 40 and the user's distribution network 50 of sending into cable TV (CATV) system transfer to each user side, each repeating base station 610 of radio paging system, 620 and 630 receive link signal (each repeating base station 610 here separately respectively from the radiofrequency signal of the different frequency of user side, 620 and 630 can be the repeating base station of different paging centers, also can be the repeating base station of the different frequent points of a paging centers), through radio-frequency transmitter 611,621 and 631 obtain audio FM separately, pass through audio demodulator 612 again, 622 and 632 obtain digit pulse level signal separately, again through separately radio frequency sending set 613,623 and 633, signal is sent to separately paging receiver.
The present invention and the link trunking modes such as less radio-frequency relaying, microwave relay, satellite circuit and special circuit of using at present Compare and have the advantages such as the frequency resource utilization is reasonable, transmission is reliable, antijamming capability is strong, expense is low.
Claims (6)
1. the transmission means of link in the radio paging system is characterized in that utilizing the information in cable TV (CATV) the system transmissions radio paging system.
2. described by claim 1, it is characterized in that information transmitted is the link information of paging control centre to repeating base station.
3. described by claim 2, it is characterized in that the link information that transmits comprises digit pulse level signal or any through in the audio signal of digit pulse level signal modulation.
4. described by claim 1, it is characterized in that in cable TV (CATV) system, link information is through ovennodulation, be modulated on the radiofrequency signal, blender, trunk transmission system and user's distribution network by front end transfer to each user side, deliver to each repeating base station of radio paging system again, demodulate link information.
5. described by claim 4, it is characterized in that if the repeating base station of indivedual radio paging systems not in the coverage of user's distribution network of cable TV (CATV) system, can directly transfer to these other repeating base stations to link information with other communication modes from the front end of cable TV (CATV) system or the paging control centre of user side or radio paging system.
6. described by claim 4, it is characterized in that the Channel Transmission mode of link information in cable TV (CATV) system comprises single channel or multiplexed any.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01124669 CN1337830A (en) | 2000-08-03 | 2001-08-02 | Link transmission mode of radio paging system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119557 CN1278697A (en) | 2000-08-03 | 2000-08-03 | Link transmission mode in radio paging system |
| CN00119557.3 | 2000-08-03 | ||
| CN 01124669 CN1337830A (en) | 2000-08-03 | 2001-08-02 | Link transmission mode of radio paging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1337830A true CN1337830A (en) | 2002-02-27 |
Family
ID=25739488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01124669 Pending CN1337830A (en) | 2000-08-03 | 2001-08-02 | Link transmission mode of radio paging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1337830A (en) |
-
2001
- 2001-08-02 CN CN 01124669 patent/CN1337830A/en active Pending
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