CN1278697A - Link transmission mode in radio paging system - Google Patents
Link transmission mode in radio paging system Download PDFInfo
- Publication number
- CN1278697A CN1278697A CN 00119557 CN00119557A CN1278697A CN 1278697 A CN1278697 A CN 1278697A CN 00119557 CN00119557 CN 00119557 CN 00119557 A CN00119557 A CN 00119557A CN 1278697 A CN1278697 A CN 1278697A
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- Prior art keywords
- cable
- catv
- radio paging
- link
- transmission
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The present invention provides a transmission mode of link in radio paging system, relates to a new application of signal transmission mode, which is characterized by that the link signal sent out by paging control centre, of radio paging system can be transmitted into all repeater base stations by means of transmission and distribution system of cable TV (CATV) system. As compared with existent link relay modes of wireless radio-frequency relay, microwave relay, satellite circuit and special-purpose circuit said invention possesses the advantages of reasonable utilization of frequency resource, reliable transmission, strong antijamming capability and low cost, etc..
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.
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 spare relaying 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 secondary modulation, and promptly being modulated on the radiofrequency signal again, the transmission distribution system 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 the transmission distribution system of cable TV (CATV) system, 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.
In a preferred embodiment, paging control centre at radio paging system, the digit pulse level signal of paging code and format device output, become audio FM through modulators modulate, deliver to the front end of cable TV (CATV) system by special circuit, be reduced into the digit pulse level signal through the demodulator demodulation again, the signal that comes out with this demodulation carries out secondary modulation to radiofrequency signal again, i.e. the frequency (FSK frequency shift keying) of the sinusoidal concussion of modulated RF transfers to each user side to the transmission distribution system of sending into cable TV through blender through the radiofrequency signal of secondary modulation then.Be dispersed in the repeating base station of radio paging system everywhere, the radiofrequency signal through each user side obtains passing through secondary modulation obtains the digit pulse level signal through demodulation again.
In a further preferred embodiment, the shared cable TVs of several radio paging systems (CATV) system is arranged, these several radio paging systems are from the paging control centre in different geographical position, pass through special circuit, modes such as microwave relay will be delivered to the front end of cable TV (CATV) system through the audio signal of digit pulse level signal modulation, with these audio signals from paging control centre the radiofrequency signal of different frequency is carried out frequency modulation(FM) (FSK frequency shift keying) then, the radiofrequency signal after the modulation reaches each user side through the transmission distribution system of blender by cable TV (CATV) system.The repeating base station of different radio paging system, after receiving radiofrequency signal, go out separately link signal from different frequency demodulations, the link information of so different paging control centre carries out relay transmission by the mode of frequency division multiplex in a cable TV (CATV) system.
The present invention compares with the link trunking modes such as less radio-frequency relaying, microwave relay, satellite circuit and special circuit of present use has 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 secondary modulation, be modulated on the radiofrequency signal, transfer to each user side by the transmission distribution system, 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 repeating base station is not in the transmission distribution system coverage of cable TV (CATV) system individually, can 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 1, it is characterized in that information Channel Transmission mode in cable TV (CATV) system comprises single channel or multiplexed any.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119557 CN1278697A (en) | 2000-08-03 | 2000-08-03 | Link transmission mode in radio paging system |
| CN 01124669 CN1337830A (en) | 2000-08-03 | 2001-08-02 | Link transmission mode of radio paging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00119557 CN1278697A (en) | 2000-08-03 | 2000-08-03 | Link transmission mode in radio paging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1278697A true CN1278697A (en) | 2001-01-03 |
Family
ID=4587801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00119557 Pending CN1278697A (en) | 2000-08-03 | 2000-08-03 | Link transmission mode in radio paging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1278697A (en) |
-
2000
- 2000-08-03 CN CN 00119557 patent/CN1278697A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |