CA2178546A1 - System for converting a paging device to a satellite terminal - Google Patents
System for converting a paging device to a satellite terminalInfo
- Publication number
- CA2178546A1 CA2178546A1 CA002178546A CA2178546A CA2178546A1 CA 2178546 A1 CA2178546 A1 CA 2178546A1 CA 002178546 A CA002178546 A CA 002178546A CA 2178546 A CA2178546 A CA 2178546A CA 2178546 A1 CA2178546 A1 CA 2178546A1
- Authority
- CA
- Canada
- Prior art keywords
- base station
- paging
- personal portable
- predetermined frequency
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A paging communications system is provided that relates to wide geographic area paging systems particularly directed towards a satellite based paging communications system. The personal portable paging system includes a typically commercially available a personal portable pager for receiving signals transmitted at a first frequency, for example of 930 MHz. A personal portable base station (located about the paging unit) converts the paging unit into a satellite terminal by receiving an L-band signal transmitted from a satellite transmitter at a second frequency, and for re-transmitting the received signal to the paging unit at the first frequency either electromagnetically or electrically. Conveniently, the base station can be carried by a user or can be mounted on or within a vehicle.
Description
2 1 78546 System For Converting a Paging Device To a Satellite Terminal Field of the Invention 5 The present invention relates generally to paging communications systems and more particularly to wide geographic area paging systems particularly directed toward a satellite based paging communications system.
Background of the Invention In the past, paging systems have provided service to a limited geographic area using a relatively high power centralized ground tr~nsmitting site. This arrangement worked ~lpqu~t~ly in small cites and municipalities, but often proved unsuitable for large metropolitan areas. To adequately serve a larger geographic area, paging systems began to simulcast (i.e. transmit the same message at sllhstzl.lti~lly the 15 same time) from several ground transmitters strategically positioned to provide wide are coverage. In such a system, an individual having a selective call receiver (pager) could receive information anywhere in the metropolitan area.
Today, the trend in paging communication is to provide even greater geographic coverage. Nationwide 20 paging systems are often contemplated in an attempt to provide paging messages to customers without regard to where they are in the United States (for example). One known multi-city paging system employs satellites to transmit paging messages to ground repeaters in appr~xi~.lately eighty cities so that their customers can be paged while traveling in any of the covered cities. Regrettably these more recent paging systems still suffer from the limited geographical coverage that can be achieved by the ground repeaters.
Accordingly, a need exists for a paging communication system that provides everyone with convenient, reliable and efficient paging service.
It is therefore an object of this invention to attempt to provide a device that will afford a more a 30 convenient paging service, provide paging service over extremely wide areas with essentially no coverage gaps yet being compatible with existing service.
It is a further object of the invention, to provide a mobile base station for coupling with existing selective call receivers, to convert these receivers, such as pagers and the like, into useful satellite terminals.
-It is an object of this invention to provide such a device that is capable of operating within FCC and Industry Canada regulations for transmitters having low power signals, thus obviating a requirement for licensing.
s Summary of the Invention Thus, in accordance with the invention, there is provided, a personal portable paging system cmllpliaillg: a personal portable paging unit for receiving signals tr~ncmilted at a first predet~.rmined frequency; and, a 10 personal portable base station (located about the paging unit) for converting the paging unit into a satellite terminal, said base station comprising receiving means for receiving a signal tr:~n.~mit1ed from a satellite transmitter at a second predetermined frequency, and for re-transmitting the received signal to the paging unit at the first predetermined frequency.
In accordance with the invention, there is further provided, a personal portable base station for use with a personal portable paging device operable to receive signals at a first pre :letPrmined frequency. The personal portable base station comprises receiving means for receiving a signal from a satellite station tr~n.cmitted at a second predetermined frequency; conversion means for converting the received signal to the first predetermined frequency; and, tr~nemitting means for tr~n~mitting the converted received signal to 20 the paging device at the first predetermined frequency.
In acc~,ldance with another aspect of the invention, a method is provided of coupling a portable pager with a satellite system. The method Colllpl ises the steps of receiving a signal at a location about the portable pager at a satellite tran.~mi1ting frequency; converting the signal to a first predetermined frequency 25 compatible with the operating frequency of the portable pager, and tr~n.~mitting the converted signal to the pager at the first predetermined frequency.
In accordance with another aspect of the invention, a personal portable base station is provided, for use with a personal portable paging device operable to receive signals of a first predetermined frequency. The 30 base station includes means for receiving a signal from a satellite station tr in~mitt~.d at a second pre~lctl rmined frequency; conversion means for converting the received signal to the first predetermined frequency; and, means for coupling the converted received signal to the personal portable paging device at the first pre/1~ t~rmined frequency.
Advantageously, the personal portable paging system in accordance with this invention, provides a relatively inexpensive transceiver for converting a signal of one frequency to another, that allows a commercially available pager to be utilized as a satellite terminal. The device can be designed to operate at power levels that do not exceed governmental standards for small tr~ncmi1ting devices not requiring 5 licensing.
Brief Description of the Drawings Exemplary embodiments of the invention will be described in conjunction with 10 the drawings, in which:
Fig. I is an illustration of a satellite system in accordance with this invention.
Fig. Ib is an illustration of a satellite system similar to that shown in Fig. Ia including a circuit similar to that of Fig. la, including a low power radio transmitter;
15 Fig. 2a is a circuit diagram of an embodiment of an MSAT paging terminal converter implementation using a down converter and filter; and, Fig. 2b is an alternative embodiment of an MSAT paging terminal converter implementation using a down converter, filter, and up converter.
20 DetailedDes~ ,; on Fundamentally, the present invention provides a continent-wide or global communication system designed to call (page) individuals having a selective call receiver (pager). According to the invention, any Cu~ )O~dly selective call receiver manufactured by any paging manufacturer may be used in the present 25 inventive system, that automatically adapts some portion of itself to accommodate the pager(s) that are llP~ign ited to receive a paging message. As will become hereinafter apparent, the accommodating nature of the present invention serves the individual (paging customer) using the pager, in that the operating range of the paging device is greatly increased.
30 Throughout this specification, the term " about the paging unit" shall be hl~ d to mean within a range and having a tr~n~mitting power and at frequencies not requiring licensing as a transmitting device. For example, in North America, typically, the maximum allowable transmitting power would not exceed 12 nanowatts; however, this may vary slightly from one geographic region to another.
At present, a satellite network exists for two-way communication of information. This network, commonly referred to as Mobile Satellite Services ("MSS"), comprises a Communications Ground Segment ("CGS") which consists of a Network Control Center and a Feeder-link Earth Station; a satellite; at least one mobile transceiver; and the existing terrestrial data and telephone networks.
The system in accordance with this invention may operate as a single or dual mode system. The paging devices to which it is designed can receive a same message simultaneously, or nearly simultaneously from two different sources, thus, from both from a satellite and from terrestrial transmitters that broadcast over 10 the local area. Therefore, the mobile base station described hereafter and the local broadcaster transmit at the same frequency. Alternatively in signal mode, the system can listen to either the satellite or the terrestrial transmitter.
Referring now to Fig. Ia, a satellite system is shown, having a ground station 10, that transmits signals in 15 the Ku-band to a mobile satellite (MSAT) 12. The MSAT 12 retransmits the received Ku-band signals in the L-band to mobile ground receivers 14. Each mobile receiver 14, in the form of a portable base station is equipped with an antenna capable of receiving an L-band signals tr~ncmit~ed from the satellite 12 at a frequency in the range of 1525 to 1559 MHz. The personal base station further includes circuitry for converting the 1525 to 1559 MHz received L-band signal to a frequency in the range of 929 to 932 MHz 20 compatible with the native frequency of a conventional pager 16. After the signals are converted, they are coupled to a pager 16 in one of two ways, shown in Figs. 2a and 2b respectively and later described. The basic operation of the system shown in Fig. 1 is as follows: A message to be transmitted to a pager 16 is sent by telephone through the public telephone network (PTN) to the ground station 10. The message is sent as a Ku-band signal tr~n~mitted by the ground station 10 destined for the pager 16 within the purview 25 of the satellite 12. The signal is received by the satellite 12 and is retr:~ncmilt~.d in the L-band to the personal base station. The base station 14 converts the L-band signal from a frequency of 1525 to 1559 MHz to a frequency of 929 to 932 MHz. Under most circumstances whether or not the pager is in the vicinity of the ground station it will receive a message destined for it if coupled to the personal base station 14. Thus, in essence, the pager 16 coupled to the base station 14 becomes a mobile personal satellite 30 terminal. Since the personal base station receives, converts, and transmits signals, a plurality of pagers 16 proximate to a single base station can receive messages in this manner.
In the first embodiment shown in Fig. Ia, the circuitry 20 for converting the L-band signal to a 930 MHz signal for coupling to the pager is shown. The circuit 20a includes an L-band antenna 24 coupled to a 2 1 78546 t converter 22 for converting the received signal to a frequency of 930 MHz. The converter 22 is electrically coupled to an adjacent terminal in the form of a paging device 16 for providing the paging device with a compatible signal.
5 Turning now to Fig. lb, a second embodiment of the invention is shown. The circuit 20b is similar to that of Fig. la, however, a low power radio transmitter (LPRT) 26 is electrically coupled to the converter 22.
The LPRT 26 is comprised of an amplifier 27 and a trAn~mitting antenna 28 that transmits a signal having a maximum power of 12 nanowatts. Thus, one or more pagers 16 or like receiving devices must be plo~ to the tran~mi~ting LPRT 26 in order to be electromagnetically coupled with it to receive the 10 tr~n~mi~ d signal. In a preferred embodiment, the LPRT 26 is designed to have a low enough power obviating a requirement for a radio broadcast license.
One embodiment of the converter 22 is shown in Fig2a and includes amplifying means in the form of a low noise amplifier (LNA) 221 for amplifying the received L-band signal and for providing the amplified signal to a bandpass filter 222; the filter 222 ~ul~ lly filters out unwanted frequency components other than those about 1.54 GHz; a mixer 224 receives the filtered 1.54 GHz signal and combines it with a synthetically generated local oscillator frequency signal of 610 MHz. By combining/multiplying these two signals together (1.54x 0.610), the 1.54 GHz signal is ~ul.~ lly converted to a 930 MHz signal. A
bandpass filter 226 is provided to filter out any unwanted frequencies substantially allowing only 930 MHz 20 frequency components to pass. The 930 MHz signal is amplified to the desired power level in an automatic gain controlled or limiting amplifier 227 to ensure that the regulatory transmit power limits are not exceeded The synthetically generated 610 MHz signal is conveniently provided, by a frequency synthesizer 225 slaved to a reference oscillator 228. The exact frequency of the synthesizer is typically programmed via a micloc~ loller 229.
A second embodiment of the converter AAA is shown in Fig2b and includes amplifying means in the form of a low noise amplifier (LNA) BBB for amplifying the received L-band signal and for providing the amplified signal to a bandpass filter CCC; the filter CCC ~ub~l~llially filters out unwanted frequency components other than those about 1.54 GHz; a mixer DDD receives the filtered 1.54 GHz signal and 30 combines it with a synthetically generated local oscillator frequency signal of 1454 MHz. By combining/multiplying these two signals together (1.54x 1.454), the 1.54 GHz signal is substantially converted to an 86 MHz signal. A bandpass filter EEE is provided to filter out any unwanted frequencies substantially allowing only 86 MHz frequency components to pass. The 86 MHz signal is amplified to the desired power level in an automatic gain controlled or limiting amplifier FFF to ensure that the regulatory transmit power limits are not exceeded. The 86 MHz signal is next presented to a mixer GGG and combined/multiplied with a synthetically generated signal of 844 MHz. This results in the 86 MHz signal being substantially converted to 930 MHz. A bandpass filter III is provided to filter out any unwanted frequencies substantially allowing only 930 MHz components to pass. The synthetically generated signals S at 1454 MHz and 844 MHz are conveniently provided, by frequency synthesizers JJJ and KKK slaved to a reference oscillator LLL. The exact frequency of the synthesizers is typically programmed via a microcontroller MMM.
Of course numerous other embodiments may be envisaged without departing from the spirit and scope of the invention.
Background of the Invention In the past, paging systems have provided service to a limited geographic area using a relatively high power centralized ground tr~nsmitting site. This arrangement worked ~lpqu~t~ly in small cites and municipalities, but often proved unsuitable for large metropolitan areas. To adequately serve a larger geographic area, paging systems began to simulcast (i.e. transmit the same message at sllhstzl.lti~lly the 15 same time) from several ground transmitters strategically positioned to provide wide are coverage. In such a system, an individual having a selective call receiver (pager) could receive information anywhere in the metropolitan area.
Today, the trend in paging communication is to provide even greater geographic coverage. Nationwide 20 paging systems are often contemplated in an attempt to provide paging messages to customers without regard to where they are in the United States (for example). One known multi-city paging system employs satellites to transmit paging messages to ground repeaters in appr~xi~.lately eighty cities so that their customers can be paged while traveling in any of the covered cities. Regrettably these more recent paging systems still suffer from the limited geographical coverage that can be achieved by the ground repeaters.
Accordingly, a need exists for a paging communication system that provides everyone with convenient, reliable and efficient paging service.
It is therefore an object of this invention to attempt to provide a device that will afford a more a 30 convenient paging service, provide paging service over extremely wide areas with essentially no coverage gaps yet being compatible with existing service.
It is a further object of the invention, to provide a mobile base station for coupling with existing selective call receivers, to convert these receivers, such as pagers and the like, into useful satellite terminals.
-It is an object of this invention to provide such a device that is capable of operating within FCC and Industry Canada regulations for transmitters having low power signals, thus obviating a requirement for licensing.
s Summary of the Invention Thus, in accordance with the invention, there is provided, a personal portable paging system cmllpliaillg: a personal portable paging unit for receiving signals tr~ncmilted at a first predet~.rmined frequency; and, a 10 personal portable base station (located about the paging unit) for converting the paging unit into a satellite terminal, said base station comprising receiving means for receiving a signal tr:~n.~mit1ed from a satellite transmitter at a second predetermined frequency, and for re-transmitting the received signal to the paging unit at the first predetermined frequency.
In accordance with the invention, there is further provided, a personal portable base station for use with a personal portable paging device operable to receive signals at a first pre :letPrmined frequency. The personal portable base station comprises receiving means for receiving a signal from a satellite station tr~n.cmitted at a second predetermined frequency; conversion means for converting the received signal to the first predetermined frequency; and, tr~nemitting means for tr~n~mitting the converted received signal to 20 the paging device at the first predetermined frequency.
In acc~,ldance with another aspect of the invention, a method is provided of coupling a portable pager with a satellite system. The method Colllpl ises the steps of receiving a signal at a location about the portable pager at a satellite tran.~mi1ting frequency; converting the signal to a first predetermined frequency 25 compatible with the operating frequency of the portable pager, and tr~n.~mitting the converted signal to the pager at the first predetermined frequency.
In accordance with another aspect of the invention, a personal portable base station is provided, for use with a personal portable paging device operable to receive signals of a first predetermined frequency. The 30 base station includes means for receiving a signal from a satellite station tr in~mitt~.d at a second pre~lctl rmined frequency; conversion means for converting the received signal to the first predetermined frequency; and, means for coupling the converted received signal to the personal portable paging device at the first pre/1~ t~rmined frequency.
Advantageously, the personal portable paging system in accordance with this invention, provides a relatively inexpensive transceiver for converting a signal of one frequency to another, that allows a commercially available pager to be utilized as a satellite terminal. The device can be designed to operate at power levels that do not exceed governmental standards for small tr~ncmi1ting devices not requiring 5 licensing.
Brief Description of the Drawings Exemplary embodiments of the invention will be described in conjunction with 10 the drawings, in which:
Fig. I is an illustration of a satellite system in accordance with this invention.
Fig. Ib is an illustration of a satellite system similar to that shown in Fig. Ia including a circuit similar to that of Fig. la, including a low power radio transmitter;
15 Fig. 2a is a circuit diagram of an embodiment of an MSAT paging terminal converter implementation using a down converter and filter; and, Fig. 2b is an alternative embodiment of an MSAT paging terminal converter implementation using a down converter, filter, and up converter.
20 DetailedDes~ ,; on Fundamentally, the present invention provides a continent-wide or global communication system designed to call (page) individuals having a selective call receiver (pager). According to the invention, any Cu~ )O~dly selective call receiver manufactured by any paging manufacturer may be used in the present 25 inventive system, that automatically adapts some portion of itself to accommodate the pager(s) that are llP~ign ited to receive a paging message. As will become hereinafter apparent, the accommodating nature of the present invention serves the individual (paging customer) using the pager, in that the operating range of the paging device is greatly increased.
30 Throughout this specification, the term " about the paging unit" shall be hl~ d to mean within a range and having a tr~n~mitting power and at frequencies not requiring licensing as a transmitting device. For example, in North America, typically, the maximum allowable transmitting power would not exceed 12 nanowatts; however, this may vary slightly from one geographic region to another.
At present, a satellite network exists for two-way communication of information. This network, commonly referred to as Mobile Satellite Services ("MSS"), comprises a Communications Ground Segment ("CGS") which consists of a Network Control Center and a Feeder-link Earth Station; a satellite; at least one mobile transceiver; and the existing terrestrial data and telephone networks.
The system in accordance with this invention may operate as a single or dual mode system. The paging devices to which it is designed can receive a same message simultaneously, or nearly simultaneously from two different sources, thus, from both from a satellite and from terrestrial transmitters that broadcast over 10 the local area. Therefore, the mobile base station described hereafter and the local broadcaster transmit at the same frequency. Alternatively in signal mode, the system can listen to either the satellite or the terrestrial transmitter.
Referring now to Fig. Ia, a satellite system is shown, having a ground station 10, that transmits signals in 15 the Ku-band to a mobile satellite (MSAT) 12. The MSAT 12 retransmits the received Ku-band signals in the L-band to mobile ground receivers 14. Each mobile receiver 14, in the form of a portable base station is equipped with an antenna capable of receiving an L-band signals tr~ncmit~ed from the satellite 12 at a frequency in the range of 1525 to 1559 MHz. The personal base station further includes circuitry for converting the 1525 to 1559 MHz received L-band signal to a frequency in the range of 929 to 932 MHz 20 compatible with the native frequency of a conventional pager 16. After the signals are converted, they are coupled to a pager 16 in one of two ways, shown in Figs. 2a and 2b respectively and later described. The basic operation of the system shown in Fig. 1 is as follows: A message to be transmitted to a pager 16 is sent by telephone through the public telephone network (PTN) to the ground station 10. The message is sent as a Ku-band signal tr~n~mitted by the ground station 10 destined for the pager 16 within the purview 25 of the satellite 12. The signal is received by the satellite 12 and is retr:~ncmilt~.d in the L-band to the personal base station. The base station 14 converts the L-band signal from a frequency of 1525 to 1559 MHz to a frequency of 929 to 932 MHz. Under most circumstances whether or not the pager is in the vicinity of the ground station it will receive a message destined for it if coupled to the personal base station 14. Thus, in essence, the pager 16 coupled to the base station 14 becomes a mobile personal satellite 30 terminal. Since the personal base station receives, converts, and transmits signals, a plurality of pagers 16 proximate to a single base station can receive messages in this manner.
In the first embodiment shown in Fig. Ia, the circuitry 20 for converting the L-band signal to a 930 MHz signal for coupling to the pager is shown. The circuit 20a includes an L-band antenna 24 coupled to a 2 1 78546 t converter 22 for converting the received signal to a frequency of 930 MHz. The converter 22 is electrically coupled to an adjacent terminal in the form of a paging device 16 for providing the paging device with a compatible signal.
5 Turning now to Fig. lb, a second embodiment of the invention is shown. The circuit 20b is similar to that of Fig. la, however, a low power radio transmitter (LPRT) 26 is electrically coupled to the converter 22.
The LPRT 26 is comprised of an amplifier 27 and a trAn~mitting antenna 28 that transmits a signal having a maximum power of 12 nanowatts. Thus, one or more pagers 16 or like receiving devices must be plo~ to the tran~mi~ting LPRT 26 in order to be electromagnetically coupled with it to receive the 10 tr~n~mi~ d signal. In a preferred embodiment, the LPRT 26 is designed to have a low enough power obviating a requirement for a radio broadcast license.
One embodiment of the converter 22 is shown in Fig2a and includes amplifying means in the form of a low noise amplifier (LNA) 221 for amplifying the received L-band signal and for providing the amplified signal to a bandpass filter 222; the filter 222 ~ul~ lly filters out unwanted frequency components other than those about 1.54 GHz; a mixer 224 receives the filtered 1.54 GHz signal and combines it with a synthetically generated local oscillator frequency signal of 610 MHz. By combining/multiplying these two signals together (1.54x 0.610), the 1.54 GHz signal is ~ul.~ lly converted to a 930 MHz signal. A
bandpass filter 226 is provided to filter out any unwanted frequencies substantially allowing only 930 MHz 20 frequency components to pass. The 930 MHz signal is amplified to the desired power level in an automatic gain controlled or limiting amplifier 227 to ensure that the regulatory transmit power limits are not exceeded The synthetically generated 610 MHz signal is conveniently provided, by a frequency synthesizer 225 slaved to a reference oscillator 228. The exact frequency of the synthesizer is typically programmed via a micloc~ loller 229.
A second embodiment of the converter AAA is shown in Fig2b and includes amplifying means in the form of a low noise amplifier (LNA) BBB for amplifying the received L-band signal and for providing the amplified signal to a bandpass filter CCC; the filter CCC ~ub~l~llially filters out unwanted frequency components other than those about 1.54 GHz; a mixer DDD receives the filtered 1.54 GHz signal and 30 combines it with a synthetically generated local oscillator frequency signal of 1454 MHz. By combining/multiplying these two signals together (1.54x 1.454), the 1.54 GHz signal is substantially converted to an 86 MHz signal. A bandpass filter EEE is provided to filter out any unwanted frequencies substantially allowing only 86 MHz frequency components to pass. The 86 MHz signal is amplified to the desired power level in an automatic gain controlled or limiting amplifier FFF to ensure that the regulatory transmit power limits are not exceeded. The 86 MHz signal is next presented to a mixer GGG and combined/multiplied with a synthetically generated signal of 844 MHz. This results in the 86 MHz signal being substantially converted to 930 MHz. A bandpass filter III is provided to filter out any unwanted frequencies substantially allowing only 930 MHz components to pass. The synthetically generated signals S at 1454 MHz and 844 MHz are conveniently provided, by frequency synthesizers JJJ and KKK slaved to a reference oscillator LLL. The exact frequency of the synthesizers is typically programmed via a microcontroller MMM.
Of course numerous other embodiments may be envisaged without departing from the spirit and scope of the invention.
Claims (19)
1. A personal portable paging system comprising:
a personal portable paging unit for receiving signals transmitted at a first predetermined frequency; and, a portable personal base station for converting the paging unit into a satellite terminal, said base station comprising receiving means for receiving a signal transmitted from a satellite transmitter at a second predetermined frequency, and for re-transmitting the received signal to the paging unit at the first predetermined frequency.
a personal portable paging unit for receiving signals transmitted at a first predetermined frequency; and, a portable personal base station for converting the paging unit into a satellite terminal, said base station comprising receiving means for receiving a signal transmitted from a satellite transmitter at a second predetermined frequency, and for re-transmitting the received signal to the paging unit at the first predetermined frequency.
2. A personal portable paging unit as defined in claim 1, wherein the personal portable base station is designed to be located about the paging unit so as to be coupled thereto.
3. A personal portable paging unit as defined in claim 1, wherein the personal portable base station is dedicated to only one personal portable paging unit.
4. A personal portable paging system as defined in claim 1, wherein the base station is a mobile unit adapted to be mounted to or within a vehicle.
5. A personal portable paging system as defined in claim 2, wherein the base station is a mobile unit, moveable from place to place and sized to be carried by a user.
6. A personal portable paging system as defined in claim 2, wherein the first predetermined frequency band is exclusive of the second predetermined frequency and wherein the first predetermined frequency band corresponds to a standard operating frequency of a portable paging unit, and wherein the second predetermined frequency corresponds to an operating transmitting frequency of a satellite.
7. A personal portable paging system as defined in claim 6, wherein a signal provided to the paging unit by the personal portable base station is identical in format and frequency to that of a standard signal normally provided to a paging unit by a fixed terrestrial transmitting base station.
8. A portable base station for use with a personal, portable, paging device operable to receive information transmitted at a first predetermined frequency, comprising:
receiving means for receiving the information destined for the personal portable paging device from a satellite transmitted at a second predetermined frequency;
conversion means for converting the received signal to the first predetermined frequency; and, means for providing the received, converted signal to the paging device at the first predetermined frequency.
receiving means for receiving the information destined for the personal portable paging device from a satellite transmitted at a second predetermined frequency;
conversion means for converting the received signal to the first predetermined frequency; and, means for providing the received, converted signal to the paging device at the first predetermined frequency.
9. A portable base station as defined in claim 8, wherein the means for providing the received converted signal to the paging device, includes means for electrically coupling the base station to the paging device.
10. A portable base station as defined in claim 8, wherein the means for providing the received converted signal to the paging device, includes means for electromagnetically coupling the base station to the paging device.
11. A portable base station as defined in claim 10, wherein the means for providing the received converted signal to the paging device, includes means for transmitting the received converted signal to the paging device.
12. A portable base station as defined in claim 11 wherein the transmitting means has a maximum transmitting power of 12 nanowatts.
13. A personal portable base station as defined in claim 8, wherein the personal portable base station is a mobile unit, moveable from place to place and sized to be carried by a user, in the form of a hand-held or body-borne unit.
14. A personal portable base station as defined in claim 8, wherein the personal portable base station is mountable to a vehicle.
15. A personal portable base station as defined in claim 8, wherein the base station is capable of transmitting the converted signal to a plurality of paging devices proximate to the base station.
16. A personal portable base station as defined in claim 8 further coupling means for coupling to a DC
power source of a vehicle.
power source of a vehicle.
17. A personal portable base station as defined in claim 8 comprising means in the form of rechargeable a power supply for coupling to and providing power to the base station.
18. A personal portable base station as defined in claim 8 wherein the first predetermined frequency is approximately, 930 MHz and wherein the second predetermined frequency is approximately 1.54 GHz.
19. A method of coupling a hand held pager with a satellite system, comprising:
receiving a signal at a location about the hand held pager at a satellite transmitting frequency; converting the signal to a first predetermined frequency compatible with the operating frequency of the hand held pager, and transmitting the converted signal to the pager at the first predetermined frequency.
receiving a signal at a location about the hand held pager at a satellite transmitting frequency; converting the signal to a first predetermined frequency compatible with the operating frequency of the hand held pager, and transmitting the converted signal to the pager at the first predetermined frequency.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21195P | 1995-06-16 | 1995-06-16 | |
| US60/000,211 | 1995-06-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2178546A1 true CA2178546A1 (en) | 1996-12-17 |
Family
ID=21690418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002178546A Abandoned CA2178546A1 (en) | 1995-06-16 | 1996-06-07 | System for converting a paging device to a satellite terminal |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2178546A1 (en) |
| MX (1) | MX9602327A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110636609A (en) * | 2019-10-23 | 2019-12-31 | 广州爱浦路网络技术有限公司 | Method for optimizing paging based on satellite network terminal |
-
1996
- 1996-06-07 CA CA002178546A patent/CA2178546A1/en not_active Abandoned
- 1996-06-13 MX MX9602327A patent/MX9602327A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110636609A (en) * | 2019-10-23 | 2019-12-31 | 广州爱浦路网络技术有限公司 | Method for optimizing paging based on satellite network terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| MX9602327A (en) | 1997-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0502977B1 (en) | Satellite based simulcast paging system | |
| EP0569486B1 (en) | A communication system capable of adjusting transmit power of a subscriber unit | |
| JP4859273B2 (en) | Method and apparatus for reducing mutual interference in a hybrid GPS receiver and communication system | |
| CA2068875C (en) | Satellite based global paging system | |
| US7174127B2 (en) | Data communications systems and methods using different wireless links for inbound and outbound data | |
| US6311128B1 (en) | Combined navigation and mobile communication satellite architecture | |
| US6029048A (en) | Repeater system having reduced power loss | |
| WO1998007286A3 (en) | In-band vehicular repeater for trunked radio system | |
| US20040192193A1 (en) | Mobile signal relay for cellular transmission in remote areas | |
| CA2564411A1 (en) | Systems and methods for space-based reuse of terrestrial cellular frequency spectrum | |
| JP2867938B2 (en) | Mobile satellite communication equipment | |
| US20020028654A1 (en) | Multimedia two-way communication terminal | |
| US20010031623A1 (en) | Channel booster amplifier | |
| US7236778B2 (en) | System and method for testing transceivers | |
| US6060996A (en) | Pager broadcast system | |
| US20070010198A1 (en) | Method and apparatus for utilizing selective signal polarization and interference cancellation for wireless communication | |
| KR100789492B1 (en) | Improved diversity coverage | |
| KR970000161B1 (en) | Radio repeater under ground | |
| CA2178546A1 (en) | System for converting a paging device to a satellite terminal | |
| KR0144208B1 (en) | Repeater | |
| US7313411B2 (en) | Wireless communication system | |
| KR100268601B1 (en) | Mobile communication system that effectively covers the shadow area of the base station and easily expands the service area | |
| KR100630453B1 (en) | Booster for digital multimedia broadcasting of satellite using car | |
| JP2972432B2 (en) | Radio structure relay system using floating structure | |
| KR20050027439A (en) | Repeater for digital satellite broadcasting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |