WO2001032481A1

WO2001032481A1 - Car alarm transmitting and paging process and system thereof

Info

Publication number: WO2001032481A1
Application number: PCT/US1999/025678
Authority: WO
Inventors: Weihao Xiao
Original assignee: New Xu International
Priority date: 1999-11-01
Filing date: 1999-11-01
Publication date: 2001-05-10

Abstract

A car alarm (01) transmitting (02) and paging (03) process and system thereof employs an existing conventional phone pager (05) and transmitter such as a common pager (05) or a cellulose phone to be used dually as a phone pager and also as an alarm activation notification device (05), comprises the steps of continuously broadcasting a 'safe' code; continuously monitoring and receiving said 'safe' code by said respective phone pager (05); notifying a user of said phone pager of a normal status of said vehicle alarm system; broadcasting a 'warning' code; receiving said 'warning' code instead of said 'safe' code by said respective phone pager (05); activating said phone pager (05) to notify said user of said phone pager of an alarm status of said vehicle alarm system (01); and notifying said user of said phone pager with said alarm status too when neither said 'safe' code nor said 'warning' code is received by said phone pager (05).

Description

Title

Car Alarm Transmitting and Paging Process and System Thereof

Technical Field

The present invention relates generally to a car alarm transmitting and paging process and system thereof, and more particularly to improvements to an existing conventional car alarm transmitter and conventional phone pager which allow pager to be used dually as a pager and also as an alarm activation notification device.

Background Art

The prior art has provided car alarm systems with various functions, methods, layouts, and constructions to combat the auto-thefts and corresponding climbs in insurance rates. The prior art can be broadly classified as localized car alarm systems and car alarm systems with tracking and locating capabilities. Localized car alarms such as disclosed by U.S. Patent No. 5,132,660 to Chen and Shee and U.S. Patent No. 5,049,867 to Stouffer activate the alarm system when the vehicle is intruded upon. However, if the owner of the vehicle or a security personnel is not in the vicinity, there is a high likelihood of the vehicle being stolen because a means of notifying the owner of the vehicle alarm activation in real time is not provided.

Consequently, most people are not willing to take action against theft if the vehicle being stolen is not theirs. Moreover, with the increasing number of false alarms, an activated alarm is often ignored. In summary, this type of security system does not provide a means of alerting the owner of alarm activation in real time regardless of the location of the vehicle with respect to the owner. Car alarm systems with tracking and locating capabilities as disclosed by U.S. Patent No. 5,223,844 to Mansell and Riley does not provide a means of notifying the owner of car alarm activation in real time.

U.S. Patent No. 5,432,495 to Tompkins discloses a beeper controlled auto security system in which a vehicle disabling device such as an ignition kill switch is selectively activated either by a hand held RF transmitter unit or a beeper paying system satellite transmission initiated by a telephone call which may be at a very remote location from the vehicle. U.S. Patent No. 5,432,495 does not disclose an improvement to an existing commercial phone pager to allow the pager to be used as an alarm activation device, as the present invention does. Moreover, the beeper taught in this invention cannot operate dually as a conventional phone beeper and an alarm activation device.

U.S. Patent No. 5,140,308 to Tanaka discloses a mobile radio system which has an upward and downward control channel for controlling a call-out transmitted from a mobile terminal station, independently from a communication channel. This invention includes a portable receiver which notifies the user of alarm activation, but the receiver does not work dually as a conventional phone pager.

U.S. Patent No. 5,334,974 to Simms et al. Discloses a fully automatic personal security system which combines the advantages of worldwide LORAN-C or GPS navigation with the substantially worldwide communication capabilities of a cellular telephone or communication satellite. This invention does not incorporate the use of a conventional phone pager and thus does not disclose a dually functional pager which operates both as a conventional phone pager and also as a notification device of alarm activation.

U.S. Patent No. 5,365,217 to Toner discloses a method and apparatus for monitoring safety of persons within a predetermined area which includes personal transmitters for wirelessly transmitting distress signals. These transmitters, however, are not conventional phone pagers and thus do not function dually as a pager and an alarm notification device. Disclosure of Invention

The present invention significantly improves upon the prior art by providing a car alarm system whereby an existing in-vehicle car alarm and a commonly available phone pager are utilized in conjunction with the present invention to provide a real time car alarm activation notice to the user even though the user may not be in the vicinity of the car and to void the necessity of the user having to carry separate pagers for the car alarm system and for personal use.

Accordingly, the primary object of the present invention is to provide an improvement to a conventional phone pager and a transmitter used in conjunction with a conventional car alarm in order to provide the user with real time notification of alarm activation.

A further object of the present invention is to provide an alarm system which reduces the amount of pagers or notification devices a carrier must hold in order to have access to adequate notification.

Another object of the present invention is to provide a car alarm transmitting and paging process and system thereof, which can insure the successive transmission and reception of the alarm signal in any environments.

Another object of the present invention is to provide a car alarm transmitting and paging process and system thereof, which can detect all possible frauds.

Accordingly, the present invention relates generally to a vehicle security system and particularly to the improvement of an existing conventional phone pager which allows the pager to be used dually as a phone pager and also as an alarm activation notification device, wherein a transmitter is used in conjunction with a conventional vehicle alarm to transmit the notification of alarm activation to the carrier of the modified pager. Because the modified pager still accepts incoming phone pages and operates as a conventional pager, this invention obviates the necessity of owning and carrying two separate pagers, one for normal pager use, and the other for notification of alarm activation.

It is a common practice of automobile thieves to disconnect the car alarm in order to inconspicuously steal an automobile. Consequently, the present invention provides a car alarm system which can still notify the owner of attempted theft when the transmitting antenna is interfered with or broken.

These together with other objects of the invention are explained clearly in the claims annexed to and forming a part of this disclosure. For a better understanding of the invention, its operating advantages and the specific objects attained by its use, reference should be made to the accompanying drawings and descriptive matter in which there are illustrated preferred embodiments of the invention.

Brief Description of the Drawings

Fig. 1 is a schematic diagram of a basic alarm and paging system.

Fig. 2 is a schematic diagram of a basic alarm transmitter.

Fig. 3 is a schematic diagram of a basic alarm pager.

Fig. 4 is a schematic diagram of a basic alarm system with group antenna.

Fig. 5 is a schematic diagram of a private paging\cellular alarm system.

Fig. 6 is a schematic diagram of a public vehicle alarm system.

Fig. 7 is a schematic diagram illustrating a switching between private and public alarm system.

Fig. 8 is a schematic diagram of the transmitting device used in conjunction with a conventional alarm system according to an alternative mode of the present invention.

Fig. 9 is a schematic diagram of the modified conventional phone pager according to the above alternative mode of the present invention. Best Mode for Carrying Out the Invention

The basic configuration of the present invention comprises a common vehicle alarm a transmitting means 02, such as a transmitter or a transceiver, and a modified conventional pager 05, as shown in Fig 1 Because sensors are normally used to trigger the activation of a car alarm, when a sensor of a conventional car alarm is activated, the transmitter 02 transmits a signal directly to the modified conventional pager 05 which notifies the user of the activation of the alar

Referring to FIG 2, the transmitter 02 comprises a microprocessor 24, wherein an alarm output interface 21 connects the sensors of the alarm system 22 to the microprocessor 24 The alarm can be activated by the user either in vehicle or remotely through the alarm control 20 The user^'s digital ID along with "safe^" and "warning^" digital alarm status codes are programmed into the microprocessor 24. and the microprocessor sends the appropriate digital alarm status code to the tone encoder 25. wherein the tone encoder 25 converts the digital code into specific modulation format and RF frequencies The radio frequencies are then sent to the amplifier 26 which are then broadcasted via an antenna 27 A programmer 23 is provided to input digital code data into the microprocessor 24

The transmitter frequencies and coding format of the transmitter are the same as those used by conventional phone paging systems so that the phone pager can recen e signals from the vehicle transmitter For instance, the encoder

translate the digital code Irom ihe microprocessor into a sequence of corresponding tone signal under the formal of the local communication regulation In the U S , it is called Metropage For example, the area code "818^" is represented by three tone signals of "1728 Hz" "741 H/\ and "1728 H/^" The radio frequencies, however, will be different according to the pager compam the user is with Furthermore, the power of the transmitter will be preset as strong as possible to reach the pager carrier even when the carrier is in a poor area for radio signal transaction But the powei should be limited to a certain level so that it will not violate FCC or other local regulations For the best results, this alarm is to be applied as a license free electronic device

FIG 3 is a schematic diagram of a conventional phone pager However, it is also the diagram for the modified conventional pager 05 of the present invention, since the maior modification only involves the improvement of the microprocessor inside the pager. Referring to FIG. 3 the modified conventional pager 05 comprises an antenna 40, an amplifier 41, a decoder 43, a microprocessor 45, a power monitor 42, control battens 44, and a display and audio output 46. The modified conventional pager 05 differs from a conventional pager only in that the microprocessor 45 is reprogrammed in the unique way disclosed in this invention in order to receive and recognize multiple paging signals, namely, the "safe" and "warning" codes stored within the microprocessor 24 of the transmitter 02 and the signal sent from the phone paging station.

When the car alarm system 01 is activated and the sensors of the alarm system 22 do not detect any theft (the sensors may be motion detectors, vibration detectors, or any other detection devices commonly used in the art of alarm systems), the interface 21 of the alarm 01 induces the microprocessor 24 to send a "safe" digital alarm status code to the encoder 25, which then is broadcasted via the antenna 27.

The receiving antenna 04 of the modified phone pager 05 receives the "safe" digital alarm frequency via the amplifier 41, and this frequency is converted to digital code through the tone decoder 43. The microprocessor 45 then analyzes the "safe" code, and informs the user of the status of the alarm via the display and/or the audio output 46, or simply doesn't display anything to conserve batteries. The transmitter 02 sends these messages periodically to constantly inform the user of the status of the alarm. Therefore, the microprocessor 45 in the pager may be programmed in a manner which allows the display and/or audio output does not respond to a "safe" status code received from the transmitter 02.

When the car alarm system 01 is activated and the sensors of the alarm system 22 detect theft, the interface 21 of the alarm 01 induces the microprocessor 24 to send a "warning" digital alarm status code to the tone encoder 25, which then is broadcasted via the antenna 27. The receiving antenna 40 of the modified phone pager 05 receives the "warning" digital alarm signal via the amplifier 41, and this signal is converted to digital code through the tone decoder 43. The microprocessor 45 then analyzes the "warning" code, and informs the user of the breach of the vehicle alarm via the display and/or the audio output 46.

In the event that thieves break the antenna 03 of the transmitter 02 in order to stop transmission of the "warning" code to the pager 05, the pager 05 does not receive the typical "safe" code, and thus a resulting "warning" code is generated in the microprocessor 45 of the pager 05, and is consequently shown on the display and through the audio output 46. This prohibits thieves from preventing the transmission of the "warning" code to the user. Thus, whether the sensors of the car alarm 01 are triggered or the transmitting antenna 03 is broken by potential thieves, the user is notified via the pager 05.

Most pagers in the current market have selecting means which allow the user to select between different modes and/or options. The microprocessor in the modified phone pager of this invention is reprogrammed so that the user may toggle between alarm mode and normal pager mode. In the alarm mode, the pager responds both to the signal from the vehicle transmitter as well as the signal from the phone paging station. In normal mode, the pager only responds to the signal from the phone paging station. The reason to do this is to prevent the pager from keep alerting the user when no "save" code is received because the user don't want to activate the vehicle alarm.

It is worth to mention that the pager in the alarm system continuously monitors the "safe" code sent by the transmitter and informs the user the safe status of the vehicle. However, if a phone call is coming to the pager while it is monitoring the "safe" code, the CPU on the pager is programmed in such a way that it will give the priority to respond to the incoming phone call. On the other hand, if the "warning" code is detected or no "safe" code is received by the pager at any time, the pager gives the priority to respond to the alarm status.

It is well known that effective RF signal communication is only possible in open space and within a limited range. However, in the vehicle system, the vehicle some times is parked in a close parking structure, which has large attenuation to RF signal. Further, the vehicle owner might loss the alarm signal if he is far away from the vehicle, or located in a complex building. In order to insure the successive transmission and reception of the alarm signal in any environments, the present invention improves the RF signal transaction by preventing the vehicle alarm from sharing the same antenna for general radio reception, wherein a special antenna for paging frequencies is used so that RF signal will be effetely transmitted.

Alternatively, a so-called Cellular/SMR antenna in the side pockets of a car's non- metallic front or rear bumper can also be used. This hidden broadband antenna operates in the paging frequencies with certain amount of gain in a nearly omnidirectional pattern around the car. The hidden antenna is protected from weather or car washer damage and with no visible masts. Theft and vandalism are minimized.

It is another option to improves the RF signal transaction by using planer antenna, PCS dB diamond antenna, patch antenna and other types of in-door antenna, which provide ultra-compact size, minimum visual impact and high performance for in-door open spaces. Also, if only one alarm antenna is installed, it is preferred to use omnidirectional antenna which radiates RF signal in all directions because, in general, it is not determined where the user is located.

As shown in Fig. 4, the application of antenna groups 63 is illustrated, wherein it is an optimum selection of different types of antennas such that each antenna will have relatively higher gain and cover different direction. The RF signal from the transmitter 61 is divided through the power divider 62 to the antenna group 63. These will help RF signal to penetrate the close parking structure and have wider coverage.

Moreover, those big parking structures 87 may install in-door antennas and RF radiating cables 86, as shown in Fig. 5, so as to improve the RF transmission. This system will pick up the alarm signal from the vehicle alarm inside the parking structure by in-door antennas 86 and transmit it to the user through an external antenna 88.

In addition, since cellular phone (or PCS) becomes more and more popular, the vehicle owner might carry a portable communication device which combines cellular phone and pager into one unit. A cellular phone can also be included into this alarm system so that the car owner can use this alarm system by either carrying a common pager or a cellular phone, or a portable communication device having both cellular phone and pager functions, as shown in Fig.5. However, the cellular phone, similar to the pager described above, still communicates with the vehicle alarm directly without any public system involved to prevent service charge.

In other words, all features related to the pager method can alternatively be applied to the cellular phone method. That is, after the user presets the alarm system , the vehicle transmitter 82 continuously transmits a "safe" code directly to the cellular phone 92 without any assistance of the public networks. The transmission format is the same as the cellular phone. Upon receiving the "safe" code from the vehicle, the CPU inside the cellular is reprogrammed such that the cellular phone keeps silent and displays the "safe" status. When the vehicle is tempted, the vehicle transmitter 82 will send a "warning" code to the cellular phone 82 so that it will alert the user by display and sound. If the alarm antenna 85 or any other components is destroyed such that no signal could be sent out, the cellular phone 92 will also alert the user because of such drop out of the incoming "safe" signal.

In view of above, direct communication between the vehicle alarm and the user's receiver is embodied without the assistance of any public network. However, in case the condition for RF transmission or reception is extremely poor, the above alarm system might still fail. Therefore, an alternative mode can be employed to improve the alarm signal transmission is to connect the alarm system with the existing paging, cellular and PCS networks because these systems have been improved to have much more guarantee coverage such that RF signal can be picked up from and transmitted to any difficult environments.

On the vehicle side, the user can select between the private format (as shown in

Fig.5) and the public format (as shown in Fig. 6), or both (as shown in Fig. 7) through the CPU programmer 23. After the public format is preset, transmitter 103 continuously transmits the "safe" code in a compatible format to the nearest base station 109 . The base station will then transfer this "safe" code to the user's cellular phone 120 (or PCS). In case the alarm system is tempted, the vehicle transmitter 103 will send the "warning" code through the base station 103 to the user's cellular phone 120. The user's handset will alert the user upon receiving the "warning" code or receives no specific signal at all because of the damage of the alarm antenna or other part of the alarm system.

Moreover, because of the expensive service charge to continuously transmit the alarm signal through the voice channel of the cellular system, it might use the control channel of the cellular system or by other less expensive way to transfer such narrow band short alarm message through the public networks. Nowadays, some cellular and PCS system, as shown in Fig. 6, already have specific channels for paging purpose just like that in the pager system. It is an option of this invention to make use those paging channels in the cellular and PCS systems to transfer vehicle alarm messages to lower down service charge. Another way to improve the RF transmission is to take advantage of an improved paging system, called two-way paging, as shown in Fig. 6. Two-way paging, similar like cellular system, has two networks, i.e. one for outgoing traffic and one for incoming traffic. However, in two-way paging, the pager 117 is allowed to transmit a very short message to the base station to save channel spacing and lower cost. When it is preset, the car transmitter 102 will continuously send the alarm status to the paging base station 113 in the same format as the two-way paging system. The base station will send this signal to 2-way pager 117 of the subscriber to report the car security status.

Also, in order for the user to determine, for economic reason, when to use the public networks to deliver the alarm signal, a reference table is provided to the user. It is well known that RF communication is reciprocal. That is, if the reception is weak in an environment, the transmission will also be weak. Therefore, after parking the vehicle, the user can compare the local signal level against that on the table. If his pager, cellular phone, PCS, two-way pager, or the vehicle receiver indicates the RF signal from the near public network is below certain level, the user will preset the vehicle alarm into a public mode from the CPU programmer before he leaves the vehicle.

Another inexpensive way to use the public network for alarm purpose is to allow the user to select public network only when it is necessary at his designation. On the vehicle side, based on the one-way alarm (transmitter only) in the above private system, there also installed a receiver, or transceiver 134 , which can be preset to receive either paging, cellular, PCS signal, or all of them from the public network, as shown in Fig. 7. The receiver 148 carried by the user continuously monitors the signal level from the vehicle transceiver 134 and will alert the user upon receiving a weak alarm signal. When the user finds out the signal is too weak, he will send out a request by his cellular phone 148, PCS or two-way pager to the public network 143. Such request can also be sent out automatically by the user's hand-set 148 upon the detection of the weak signal from the vehicle. Upon the receiving of this request, the public network 143 will send a command to the vehicle. Upon the detection of this command by the vehicle receiver 134, the CPU will switch the alarm transmitter 134 from private into public format so that the alarm signal can effetely be transmitted through the public network 143 to the user's receiver 148.

After the vehicle transmitter 134 and the user's receiver 148 are set to public mode, the use, or the user's receiver 148 itself, can periodically request the public network 143 to reset the vehicle alarm system 143 back to private mode. If the signal from the private mode is back to normal again, the system will stay with the private mode until a weak signal is detected again.

Fraud detection is a major feature of this alarm system. As mentioned above, in case the alarm antenna is broken by theft, the pager will detect such theft because of the loss of the continuous "safe" signal. However, if the theft destroys the system by slowly isolating the antenna from the pager so that the RF signal drops gradually, the pager might treat it as normal conditions as if the user walks away from the vehicle. Also, if the theft duplicates a fraud 'safe" signal similar to the alarm system before isolating the antenna from the user, the pager may not detect such theft.

In order to detect all possible frauds, a batten on the pager can be pushed to record the signal level when the user arrives in his destination. The power monitor 42 in the pager, as shown in Fig. 3, will compare the incoming signal continuously with the recorded level. When fraud happens, the signal level appears on the pager will certainly change significantly in a short period of time, which will cause the pager to alert the user. Further, the pager is programmed not to respond to those slow changes of signal level when the user walks away from the vehicle or moves around at the designation.

The present invention can detect fraud signal by using any available anti-fraud coding technique. For instance, the alarm from the vehicle can be programmed with some "pin code" as used in cellular phone system such that the pager will only recognize this specific code as its "home" signal. Otherwise, the pager will alert the user if it receives any other different coding.

Figs. 8 and 9 illustrate an alternative mode according to the above embodiment of the present invention, wherein the car alarm transmitting and paging system also comprises a transmitter 100 and a modified conventional pager 200. Because sensors are normally used to trigger the activation of a car alarm, when a sensor of a conventional car alarm is activated, the transmitter 100 transmits a signal to the modified conventional pager 200 which notifies the user of the activation of the alarm. Referring to FIG. 8, the transmitter 100 comprises a microprocessor 110, wherein a relay 130 connects the sensors of the alarm system 120 to the microprocessor 110. The user's digital ID along with "safe" and "warning" digital alarm status codes are programmed into the microprocessor 110, and the microprocessor sends the appropriate digital alarm status code to the tone encoder 150, wherein the tone encoder 150 converts the digital code into tone frequencies which in turn are converted into radio frequencies by the frequency modulator 160. The radio frequencies are then sent to the FM amplifier 170 which are then broadcasted via an antenna 180. A keypad 140 is provided to input digital code data into the microprocessor 110.

The transmitter frequencies and coding format of the transmitter are the same as those used by conventional phone paging systems so that the phone pager can receive signals from the vehicle transmitter. For instance, the tone encoder translates the digital code from the microprocessor into a sequence of corresponding tone signal under the format of the local communication regulation. In the U.S., it is called Metropage. For example, the area code "818" is represented by three tone signals of "1728 Hz", "741 Hz", and "1728 Hz". The radio frequencies, however, will be different according to the pager company the user is with. Furthermore, the power of the transmitter is strong enough to reach the pager carrier even when the carrier is in a difficult area for radio communications. But the power should be limited to a certain level so that it will not violate FCC regulations. For the best results, this alarm is to be applied as a license free electronic device.

FIG. 9 is a schematic diagram of a conventional phone pager. However, it is also the diagram for the modified conventional pager 200 of the present invention, since the modification only involves the improvement of the microprocessor inside the pager. Referring to FIG. 9, the modified conventional pager 200 comprises an antenna 210, a FM receiver 220, a tone decoder 230, a microprocessor 240, a display 250, and an audio output 260. The modified conventional pager 200 differs from a conventional pager only in that the microprocessor 240 is reprogrammed in the unique way disclosed in this invention in order to receive and recognize multiple paging signals, namely, the "safe" and "warning" codes stored within the microprocessor 1 10 of the transmitter 100 and the signal sent from the phone paging station.

When the car alarm system 120 is activated and the sensors of the alarm system 120 do not detect any theft (the sensors may be motion detectors, vibration detectors, or any other detection devices commonly used in the art of alarm systems), the relay 130 of the alarm 120 induces the microprocessor 110 to send a "safe" digital alarm status code to the tone encoder 150, which then is broadcasted via the antenna 180.

The receiving antenna 210 of the modified phone pager 200 receives the "safe" digital alarm frequency via the FM receiver, and this frequency is converted to digital code through the tone decoder 230. The microprocessor 240 then analyzes the "safe" code, and informs the user of the status of the alarm via the display 250 and/or the audio output 260, or simply doesn't display anything to conserve batteries. The transmitter 100 sends these messages periodically to constantly inform the user of the status of the alarm. Therefore, the microprocessor 240 may be programmed in a manner which allows the display and/or audio output does not respond to a "safe" status code received from the transmitter 100.

When the car alarm system 120 is activated and the sensors of the alarm system 120 detect theft, the relay 130 of the alarm 120 induces the microprocessor 110 to send a "warning" digital alarm status code to the tone encoder 150, which then is broadcasted via the antenna 180. The receiving antenna 210 of the modified phone pager 200 receives the "warning" digital alarm signal via the FM receiver, and this signal is converted to digital code through the tone decoder 230. The microprocessor 240 then analyzes the "warning" code, and informs the user of the status of the alarm via the display 250 and/or the audio output 260.

In the event that thieves break the antenna 180 of the transmitter 100 in order to stop transmission of the "warning" code to the pager 200, the pager 200 does not receive the typical "safe" code, and thus a resulting "warning" code is generated in the microprocessor 240 of the pager 200, and is consequently shown on the display 250 and through the audio output 260. This prohibits thieves from preventing the transmission of the "warning" code to the user. Thus, whether the sensors of the car alarm 120 are triggered or the transmitting antenna 180 is broken by potential thieves, the user is notified via the pager 200.

By means of the car alarm transmitter and the respective modified phone pager as disclosed above, the present invention substantially proceeds a car alarm transmitting and paging process, which comprises the following steps. (a) Continuously or periodically broadcast a "safe" code, which is a transmitting signal with a specific frequency, from the vehicle transmitter when the vehicle alarm system is activated to normally function, wherein the frequencies and coding format of vehicle transmitter are compatible with the phone pager.

(b) Continuously monitor and receive the "safe" code by the respective phone pager.

(c) Notify the user of the phone pager of a normal status of the vehicle alarm system, i.e. the vehicle alarm system is normally functioned.

(d) Broadcast a "warning" code, which is also a transmitting signal with another frequency, from the vehicle transmitter when a sensor of the vehicle alarm system detects theft, i.e. senses a breach of security provided by the vehicle alarm system.

(e) Receive the "warning" code instead of the "safe" code by the respective phone pager.

(f) Activate the phone pager to notify the user of the phone pager of an alarm status of the vehicle alarm system, i.e. the vehicle alarm system is triggered to respond.

(g) When neither the "safe" code nor the "warning" code is received by the phone pager, notify the user of the phone pager with the alarm status too.

Before the step (a), the present invention may further comprises a pre-step of selecting between an alarm mode and a normal mode for the phone pager, wherein in the alarm mode, the phone pager responds both to the signal from the vehicle transmitter as well as the signal from the phone paging station, and in the normal mode, the phone pager only responds to the signal from the phone paging station.

The step (a) further comprises the sub-steps of:

(a-1) activating the vehicle alarm system; (a-2) sending a "safe" digital alarm status code from a transmitter CPU to an encoder of the vehicle transmitter for encoding the "safe" digital alarm status code to the "safe" code; and

(a-3) broadcasting the "safe" code via an antenna.

The step (b) further comprises the sub-steps of:

(b-1) continuously monitoring the "safe" code by a paging antenna of the phone pager which is modified to reprogrammed a pager CPU of the phone pager to be capable of receiving and recognizing multiple paging signals, including the "safe" code and the

"warning" code stored within the transmitter CPU and the signal sent from the phone paging station;

(b-2) receiving the "safe" code from the respective car transmitter;

(b-3) converting the "safe" code to a "safe" digital code through a decoder of the phone pager;

(b-3) analyzing the "safe" code by the paging CPU; and

Moreover, the notifying step (c) can be proceeded by notifying the user of the phone pager of the safe status of the vehicle alarm system with a safe message via a display and/or an audio output of the phone pager; or notifying the user of the phone pager of the safe status of the car alarm system by allowing the display and/or audio output do not respond to the "safe" code received from the car transmitter.

The step (d) further comprises the sub-steps of:

(d-1) sensing a theft by the car alarm system;

(d-2) sending a "warning" digital alarm status code from the transmitter CPU to the encoder of the vehicle transmitter for encoding the "warning" digital alarm status code to the "warning" code; and (d-3) broadcasting the "warning" code via the antenna.

In the steps (a-3) and (d-3), the antenna can be the vehicle's antenna responsive to general radio reception. The antenna can also be an additional independent antenna for paging frequencies, a so-called Cellular/SMR antenna, a planer antenna, a PCS dB diamond antenna, a patch antenna, or other types of in-door antenna.

The RF signal transmission can be further enhanced by installing an in-door antenna and radiating cables in a parking structure where the vehicle parked inside, so that the "safe" code and the "warning" code are first received by the in-door antenna of the parking structure and then transmitted to the respective phone pager through an external antenna of the parking structure.

The step (e) further comprises the sub-steps of:

(e-1) receiving the "warning" code from the respective vehicle transmitter;

(e-2) converting the "warning" code to a "warning" digital code through the decoder of the phone pager; and

(e-3) analyzing the "warning" code by the paging CPU.

Thereafter, the notifying step (f) is processed by notifying the user of the phone pager of the warning status of the car alarm system with a "warning" message via a display and/or an audio output of the phone pager.

If the antenna of the transmitter is broken by the theft in order to stop transmission of the "warning" code to the phone pager, the phone pager will not receive the continuously or periodically broadcasting "safe" code. According to the present invention, in the step (g), the transmitter CPU is preprogrammed to generate the "warning" digital code once the receiving of the "safe" code is ceased for any reason. Therefore, the user will also be notified of the warning status of the car alarm system with a "warning" message via a display and/or an audio output of the phone pager. Thus, whether the sensors of the car alarm system are triggered or the transmitting antenna is broken by potential thieves, the user is notified via the phone pager.

To further improve fraud detection of this vehicle alarm process, besides of the continuous and periodic transmission of the alarm status, it further comprises the following steps:

(h) recording a normal signal level by said phone pager upon receiving the nominal "safe" code from the alarm transmitter;

(i) comparing incoming signal level and coding format continuously with the previous recorded signal;

(j) notifying the user a breach of vehicle alarm when the signal level and format appearing on the user's phone pager deviate significantly from said recorded signal;

(k) maintaining said phone pager not to respond to a normal slow changing of said signal level due to the moving or changing of location of the user

When a phone call is coming to said phone pager while said phone pager is monitoring the "safe" code, the phone pager responds to said phone call first and switches back to monitor the "safe" code after processing of the incoming phone call. However, when the "warning" code is received or no "safe" code is received, the phone pager responds to said

"warning" code in priority.

The pager described previously can also include a cellular phone or a cellular phone with a built-in pager, which can perform the same function as the common pager.

For better signal transmission, the vehicle alarm signal can also transmitted through a public network, such as cellular, PCS, and two-way paging system.

To lower down cost, the vehicle alarm signal can be transmitted through the public network by using its control channels and paging channels.

To further improve RF signal transaction, the alarm signal from the vehicle is first received by an in-door antenna of a parking structure where the vehicle is parked. Then the alarm signal is transmitted to the user through an external antenna in the parking structure.

To further improve signal transmission, more than one antenna (or an antenna group) are installed on the vehicle. The alarm signal can be transmitted via this antenna group to the user for better coverage.

In order to improve the quality of signal transition and lower down service charge, the alarm signal can be transmitted selectively between direct (private) mode and public mode, wherein the transmitter of the vehicle alarm can be replaced by a transceiver (transmitter & receiver) for transmitting alarm signal and receiving control signal from public networks. Moreover, the CPU of the transmitter is reprogrammed and connected to a RF switch adapted to selectively switch the transmitter between direct (private) and mode. Accordingly, the car alarm transmitting and paging process of the present invention can also comprise the steps of:

(i) presetting a transmission mode of the alarm transmitter between direct and public mode by the user when leaving the vehicle,

(ii) sending out a request by the user at his designation to said vehicle alarm through said public networks, and

(iii) switching the transmission mode of said transmitter between direct and public mode by the CPU and the RF switch upon receiving said request from said public networks, and

(iv) sending out request by the user's two-way device (cellular, PCS and two-way pager) automatically to the vehicle alarm through the public network to switch the transmission mode of the vehicle transmitter between private and public mode, wherein the selection depends on the alarm signal level appears on the user's two-way device, wherein selecting direct (private) mode for strong signal and selecting public mode for weak signal.

Claims

What is Claimed is

1. A vehicle alarm transmitting and paging process, comprising the steps of:

(a) continuously broadcasting a "safe" code, which is a transmitting signal with a specific frequency, when a vehicle alarm system installed in a vehicle is activated to normally function, wherein said frequencies and coding format of said transmitting signal are compatible with a respective phone pager;

(b) continuously monitoring and receiving said "safe" code by said respective phone pager;

(c) notifying a user of said phone pager of a normal status of said vehicle alarm system that said vehicle alarm system is normally functioned;

(d) broadcasting a "warning" code, which is also a transmitting signal with another frequency, when a sensor of said vehicle alarm system detects theft;

(e) receiving said "warning" code instead of said "safe" code by said respective phone pager;

(f) activating said phone pager to notify said user of said phone pager of an alarm status of said vehicle alarm system that said vehicle alarm system is triggered to respond; and

(g) notifying said user of said phone pager with said alarm status too when neither said "safe" code nor said "warning" code is received by said phone pager.

2. A vehicle alarm transmitting and paging process, comprising the steps of:

(a) periodically broadcasting a "safe" code, which is a transmitting signal with a specific frequency, when a vehicle alarm system installed in a vehicle is activated to normally function, wherein said frequencies and coding format of said transmitting signal are compatible with a respective phone pager; (b) continuously monitoring and receiving said "safe" code by said respective phone pager;

(c ) notifying a user of said phone pager of a normal status of said vehicle alarm system that said vehicle alarm system is normally functioned;

3. A vehicle alarm transmitting and paging process, as recited in claim 1, wherein, before said step (a), further comprising a step of selecting between an alarm mode and a normal mode for said phone pager, wherein in said alarm mode, said phone pager responds both to said transmitting signal as well as signals from a phone paging station, and in said normal mode, said phone pager only responds to said signals from said phone paging station.

4. A vehicle alarm transmitting and paging process, as recited in claim 2, wherein, before said step (a), further comprising a step of selecting between an alarm mode and a normal mode for said phone pager, wherein in said alarm mode, said phone pager responds both to said transmitting signal as well as signals from a phone paging station, and in said normal mode, said phone pager only responds to said signals from said phone paging station.

5. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein the step (a) further comprises the steps of:

(a-1) activating said vehicle alarm system; (a-2) sending a "safe" digital alarm status code from a transmitter CPU to an encoder of a vehicle transmitter for encoding said "safe" digital alarm status code to said "safe" code; and

(a-3) broadcasting said "safe" code via an antenna.

6. A vehicle alarm transmitting and paging process, as recited in claim 5, wherein the step (b) further comprises the steps of:

(b-1) continuously monitoring said "safe" code by a paging antenna of said phone pager which is modified to reprogrammed a pager CPU of said phone pager to be capable of receiving and recognizing multiple paging signals, including said "safe" code and said "warning" code stored within said transmitter CPU and said signal sent from said phone paging station;

(b-2) receiving said "safe" code from said respective vehicle transmitter;

(b-3) converting said "safe" code to a "safe" digital code through a decoder of said phone pager;

(b-3) analyzing said "safe" code by said paging CPU; and

7. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein said notifying step (c) is proceeded by notifying said user of said phone pager of said safe status of said vehicle alarm system with a safe message selectively via a display and an audio output of said phone pager.

8. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or

4, wherein said notifying step (c) is proceeded by notifying said user of said phone pager of said safe status of said vehicle alarm system by allowing said phone pager does not respond to said "safe" code.

9. A vehicle alarm transmitting and paging process, as recited in claim 6, wherein said notifying step (c) is proceeded by notifying said user of said phone pager of said safe status of said vehicle alarm system with a safe message selectively via a display and an audio output of said phone pager.

10. A vehicle alarm transmitting and paging process, as recited in claim 6, wherein said notifying step (c) is proceeded by notifying said user of said phone pager of said safe status of said vehicle alarm system by allowing said phone pager does not respond to said "safe" code.

11. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein the step (d) further comprises the steps of:

(d-1) sensing a theft by said vehicle alarm system;

(d-2) sending a "warning" digital alarm status code from a transmitter CPU to an encoder of a vehicle transmitter for encoding said "warning" digital alarm status code to said "warning" code; and

(d-3) broadcasting said "warning" code via an antenna, and

(d-4) no said signal sending out when antenna and other components being damaged.

12. A vehicle alarm transmitting and paging process, as recited in claim 7, wherein the step (d) further comprises the steps of:

(d-1) sensing a theft by said vehicle alarm system;

(d-2) sending a "warning" digital alarm status code from said transmitter CPU to said encoder of a vehicle transmitter for encoding said "warning" digital alarm status code to said "warning" code; and

(d-3) broadcasting said "warning" code via said antenna.

13. A vehicle alarm transmitting and paging process, as recited in claim 8, wherein the step (d) further comprises the steps of: (d-1) sensing a theft by said vehicle alarm system;

(d-3) broadcasting said "warning" code via said antenna.

14. A vehicle alarm transmitting and paging process, as recited in claim 9, wherein the step (d) further comprises the steps of:

(d-1) sensing a theft by said vehicle alarm system;

(d-3) broadcasting said "warning" code via said antenna.

15. A vehicle alarm transmitting and paging process, as recited in claim 10, wherein the step (d) further comprises the steps of:

(d-1) sensing a theft by said vehicle alarm system;

(d-3) broadcasting said "warning" code via said antenna.

16. A vehicle alarm transmitting and paging process, as recited in claim 1 1, wherein the step (e) further comprises the steps of:

(e-1) receiving said "warning" code from said respective vehicle transmitter; (e-2) converting said "warning" code to a "warning" digital code through said decoder of said phone pager; and

(e-3) analyzing said "warning" code by said paging CPU.

17. A vehicle alarm transmitting and paging process, as recited in claim 12, wherein the step (e) further comprises the steps of:

(e-1) receiving said "warning" code from said respective vehicle transmitter;

(e-2) converting said "warning" code to a "warning" digital code through said decoder of said phone pager; and

(e-3) analyzing said "warning" code by said paging CPU.

18. A vehicle alarm transmitting and paging process, as recited in claim 13, wherein the step (e) further comprises the steps of:

(e-1) receiving said "warning" code from said respective vehicle transmitter;

(e-3) analyzing said "warning" code by said paging CPU.

19. A vehicle alarm transmitting and paging process, as recited in claim 14, wherein the step (e) further comprises the steps of:

(e-1) receiving said "warning" code from said respective vehicle transmitter;

(e-3) analyzing said "warning" code by said paging CPU.

20. A vehicle alarm transmitting and paging process, as recited in claim 15, wherein the step (e) further comprises the steps of:

(e-1) receiving said "warning" code from said respective vehicle transmitter;

(e-3) analyzing said "warning" code by said paging CPU.

21. A vehicle alarm transmitting and paging process, as recited in claim 16, wherein the step (f) is processed by notifying said user of said phone pager of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

22. A vehicle alarm transmitting and paging process, as recited in claim 17, wherein the step (f) is processed by notifying said user of said phone pager of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

23. A vehicle alarm transmitting and paging process, as recited in claim 18, wherein the step (f) is processed by notifying said user of said phone pager of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

24. A vehicle alarm transmitting and paging process, as recited in claim 19. wherein the step (f) is processed by notifying said user of said phone pager of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

25. A vehicle alarm transmitting and paging process, as recited in claim 20, wherein the step (f) is processed by notifying said user of said phone pager of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

26. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via a display and an audio output of said phone pager.

27. A vehicle alarm transmitting and paging process, as recited in claim 21, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

28. A vehicle alarm transmitting and paging process, as recited in claim 22, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

29. A vehicle alarm transmitting and paging process, as recited in claim 23, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

30. A vehicle alarm transmitting and paging process, as recited in claim 24, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

31. A vehicle alarm transmitting and paging process, as recited in claim 25, wherein in the step (g), a transmitter CPU is preprogrammed to generate said "warning" digital code once said receiving of said "safe" code is ceased for any reason, so that said user is notified of said warning status of said vehicle alarm system with a warning message selectively via said display and said audio output of said phone pager.

32. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

33. A vehicle alarm transmitting and paging process, as recited in claim 27, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

34. A vehicle alarm transmitting and paging process, as recited in claim 28, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

35. A vehicle alarm transmitting and paging process, as recited in claim 29, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

36. A vehicle alarm transmitting and paging process, as recited in claim 30, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

37. A vehicle alarm transmitting and paging process, as recited in claim 31, wherein in the step (b) and (c), when a phone call is coming to said phone pager while said phone pager is monitoring said "safe" code, said phone pager responds to said phone call, and that in the step (e), (f) and (g), when said "warning" code is received or no "safe" code is received, said phone pager responds to said "warning" code in priority.

38. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

(i) comparing signal level and coding format of said "safe" code continuously with said recorded signal;

(j) notifying said user of said phone pager with a warning message when said signal level and format appearing on said phone pager deviate significantly from said recorded signal; and

(k) maintaining said phone pager not to respond to a normal slow changing of said signal level.

39. A vehicle alarm transmitting and paging process, as recited in claim 33, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

40. A vehicle alarm transmitting and paging process, as recited in claim 34, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

41. A vehicle alarm transmitting and paging process, as recited in claim 35, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

42. A vehicle alarm transmitting and paging process, as recited in claim 36, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

43. A vehicle alarm transmitting and paging process, as recited in claim 37, after the step (g), further comprising the steps of:

(h) recording a normal signal level by said phone pager;

44. A vehicle alarm transmitting and paging process, as recited in claim 1. 2, 3, or 4, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

45. A vehicle alarm transmitting and paging process, as recited in claim 39, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

46. A vehicle alarm transmitting and paging process, as recited in claim 40, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

47. A vehicle alarm transmitting and paging process, as recited in claim 41, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

48. A vehicle alarm transmitting and paging process, as recited in claim 42, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

49. A vehicle alarm transmitting and paging process, as recited in claim 43, wherein in the step (a) and step (d), said "safe" code and said "warning" code are broadcasted via group antennas from said vehicle.

50. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

51. A vehicle alarm transmitting and paging process, as recited in claim 39, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

52. A vehicle alarm transmitting and paging process, as recited in claim 40, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

53. A vehicle alarm transmitting and paging process, as recited in claim 41, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

54. A vehicle alarm transmitting and paging process, as recited in claim 42, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

55. A vehicle alarm transmitting and paging process, as recited in claim 43, wherein in the step (a) and step (d), said "safe" code and said "warning" code are first received by an in-door antenna of a park structure where said vehicle parked therein, and then transmitted to said phone pager through an external antenna of said parking structure.

56. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3 or 4, wherein said phone pager is a common pager.

57. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3 or 4, wherein said phone pager is a two-way wireless device.

58. A vehicle alarm transmitting and paging process, as recited in claim 39, wherein said phone pager is a two-way wireless device.

59. A vehicle alarm transmitting and paging process, as recited in claim 40, wherein said phone pager is a two-way wireless device.

60. A vehicle alarm transmitting and paging process, as recited in claim 41, wherein said phone pager is a two-way wireless device.

61. A vehicle alarm transmitting and paging process, as recited in claim 42, wherein said phone pager is a two-way wireless device.

62. A vehicle alarm transmitting and paging process, as recited in claim 43, wherein said phone pager is a two-way wireless device.

63. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

64. A vehicle alarm transmitting and paging process, as recited in claim 39, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

65. A vehicle alarm transmitting and paging process, as recited in claim 40, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

66. A vehicle alarm transmitting and paging process, as recited in claim 41, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

67. A vehicle alarm transmitting and paging process, as recited in claim 42, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

68. A vehicle alarm transmitting and paging process, as recited in claim 43, wherein said "safe" code and said "warning" code are transmitted through a public network including to use voice, paging and control channels thereof.

69. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, further comprising the steps of:

(i) presetting a transmission mode between a direct private mode and a public mode of a vehicle transmitter by said user when said user leaves said vehicle,

(ii) sending out a designated request by said user to said vehicle alarm through said public networks,

(iii) switching said transmission mode of said transmitter between said direct private mode and said public mode by means of a transmitter CPU and a RF switch upon receiving said request from said public networks, and

(iv) sending out said request by said paging phone which is a two-way wireless device automatically to said vehicle alarm through said public network to switch said transmission mode of said vehicle transmitter between said direct private mode and said public mode, depending on a alarm signal level appears on said two-way wireless device, wherein said direct private mode is adapted for strong signal transmission and said public mode is adapted for weak signal transmission.

70. A vehicle alarm transmitting and paging process, as recited in claim 39, further comprising the steps of:

(i) presetting a transmission mode between a direct private mode and a public mode of said vehicle transmitter by said user when said user leaves said vehicle,

(iii) switching said transmission mode of said transmitter between said direct private mode and said public mode by means of said transmitter CPU and a RF switch upon receiving said request from said public networks, and

71. A vehicle alarm transmitting and paging process, as recited in claim 40, further comprising the steps of:

(ii) sending out a designated request by said user to said vehicle alarm through said public networks, (iii) switching said transmission mode of said transmitter between said direct private mode and said public mode by means of said transmitter CPU and a RF switch upon receiving said request from said public networks, and

72. A vehicle alarm transmitting and paging process, as recited in claim 41, further comprising the steps of:

73. A vehicle alarm transmitting and paging process, as recited in claim 42, further comprising the steps of: (i) presetting a transmission mode between a direct private mode and a public mode of said vehicle transmitter by said user when said user leaves said vehicle,

74. A vehicle alarm transmitting and paging process, as recited in claim 43, further comprising the steps of:

75. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3 or 4, wherein said phone pager is a cellular phone.

76. A vehicle alarm transmitting and paging process, as recited in claim 70, wherein said phone pager is a cellular phone.

77. A vehicle alarm transmitting and paging process, as recited in claim 71, wherein said phone pager is a cellular phone.

78. A vehicle alarm transmitting and paging process, as recited in claim 72, wherein said phone pager is a cellular phone.

79. A vehicle alarm transmitting and paging process, as recited in claim 73, wherein said phone pager is a cellular phone.

80. A vehicle alarm transmitting and paging process, as recited in claim 74, wherein said phone pager is a cellular phone.

81. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or

4, wherein said phone pager is a personal communication system, PCS.

82. A vehicle alarm transmitting and paging process, as recited in claim 70, wherein said phone pager is a personal communication system, PCS.

83. A vehicle alarm transmitting and paging process, as recited in claim 71, wherein said phone pager is a personal communication system, PCS.

84. A vehicle alarm transmitting and paging process, as recited in claim 72, wherein said phone pager is a personal communication system, PCS.

85. A vehicle alarm transmitting and paging process, as recited in claim 73, wherein said phone pager is a personal communication system, PCS.

86. A vehicle alarm transmitting and paging process, as recited in claim 74, wherein said phone pager is a personal communication system, PCS.

87. A vehicle alarm transmitting and paging process, as recited in claim 1, 2, 3, or 4, wherein said phone pager is a two-way-pager.

88. A vehicle alarm transmitting and paging process, as recited in claim 70, wherein said phone pager is a two-way-pager.

89. A vehicle alarm transmitting and paging process, as recited in claim 71, wherein said phone pager is a two-way-pager.

90. A vehicle alarm transmitting and paging process, as recited in claim 72, wherein said phone pager is a two-way-pager.

91. A vehicle alarm transmitting and paging process, as recited in claim 73, wherein said phone pager is a two-way-pager.

92. A vehicle alarm transmitting and paging process, as recited in claim 74, wherein said phone pager is a two-way-pager.

93. A vehicle alarm transmitting and paging system, comprising:

a vehicle alarm system having at least one sensor adapted for triggering said vehicle alarm system when a theft is detected;

a vehicle transmitter for continuously broadcasting a "safe" code which is a transmitting signal with a specific frequency when said vehicle alarm system is activated to normally function, and broadcasting a "warning" code with another frequency when said vehicle alarm system is triggered; and

a phone pager, which is modified to be capable of receiving said "safe" code and said "warning" code, for continuously monitoring and receiving said "safe" code and notifying an user of said phone pager of a normal status of said vehicle alarm system that said vehicle alarm system is normally functioned, wherein when said phone pager receives said "warning" code instead of said "safe" code from said vehicle transmitter, said phone pager is adapted for notifying said user of said phone pager of an alarm status of said vehicle alarm system that said vehicle alarm system is triggered to respond, wherein when neither said "safe" code nor said "warning" code is received by said phone pager, said phone pager is activated to notify said user of said phone pager with said alarm status too.

94. A vehicle alarm transmitting and paging system, as recited in claim 93, wherein said vehicle transmitter comprises a microprocessor which is programmed with a user's ID, "safe" and a "warning" digital alarm status code, a interface for connecting said sensor of said vehicle alarm system with said microprocessor, a encoder for transmitting said "safe" and "warning" digital alarm status codes which are converted into digital format and RF frequencies, an antenna, and an amplifier which amplifies said radio frequencies and broadcasts via said antenna.

95. A vehicle alarm transmitting and paging system, as recited in claim 94, wherein said phone pager comprises a paging antenna and a receiver adapted for receiving said radio frequencies, a tone decoder for decoding said radio frequencies into digital codes, a microprocessor for analyzing said digital codes to distinguish said "safe" code and said "warning" code.

96. A multi-purpose car alarm transmitting and paging system utilizing a conventional pager for both conventional phone paging and car alarm activation notification, comprising:

a transmitter connected to a conventional car alarm via a interface, wherein said interface is activated when said conventional car alarm is activated, wherein said interface is not activated when said conventional car alarm is not activated, wherein said transmitter comprises:

a microprocessor which periodically sends digital codes according to information received from said interface;

a digital "safe" code stored in said microprocessor, wherein said "safe: code is sent o an encoder if said interface is not activated;

a digital "warning" code stored in said microprocessor, wherein said "warning" code is sent to said encoder if said interface is activated;

a programmer of inputting other digital codes into said microprocessor;

said encoder connected to said microprocessor, wherein said encoder converts said digital codes into digital modulation format signals, wherein said digital format signals are compatible with local phone paging systems;

a power amplifier connected to said tone encoder, wherein said amplifier converts said digital signals into radio frequencies, wherein said radio frequencies are compatible with local phone paging systems;

an antenna connected to said amplifier;

said transmitter having a small enough broadcasting range to conform to FCC regulations;

a modified phone pager which receives signals from both a conventional phone paging station and said transmitter, comprising

an antenna;

a amplifier connected to said antenna;

a decoder connected to said amplifier, wherein said decoder converts said tone signals into digital codes;

a microprocessor connected to said decoder;

said microprocessor able to recognize said "safe" and 'warning" messages of said microprocessor of said transmitter; said microprocessor also able to recognize incoming pages from said conventional phone paging station;

said microprocessor sending a "warning" message to said display and an audio output when a "warning" message is received from said transmitter;

said microprocessor not sending any message to said display and said audio output when a "safe" message is received from said transmitter;

said microprocessor sending a "warning" message to said display and said audio output when neither a "safe" nor a "warning" message is received from said transmitter'

said display wherein said microprocessor determines what is displayed on said display;

said audio output wherein said microprocessor determines whether said audio output is activated or deactivated;

said pager having a means to select between an alarm mode and a normal mode, wherein said alarm mode allows said pager to accept incoming pages as well as transmissions from said transmitter, wherein said normal mode allows said pager to accept only incoming pages.

97. A vehicle alarm transmitting and paging system, as recited in claim 95, wherein said pager comprises a CPU programmed to respond to incoming phone calls in priority when said pager is monitors said "safe" code, wherein said CPU responds to alarm signal in priority when said "warning" code is received or no "safe" code is received.

98. A vehicle alarm transmitting and paging system, as recited in claim 96, wherein said pager comprises a CPU programmed to respond to incoming phone calls in priority when said pager is monitors said "safe" code, wherein said CPU responds to alarm signal in priority when said "warning" code is received or no "safe" code is received.

99. A vehicle alarm transmitting and paging system, as recited in claim 97, wherein said phone pager comprise a batten to activate signal recording, a power monitor to record nominal signal level and format from said alarm transmitter, a CPU continuously comparing incoming signal with recorded signal, and to alert the user when in-normal signal is received and ignores nominal changing of signal level due to the user change his location.

100. A vehicle alarm transmitting and paging system, as recited in claim 98, wherein said phone pager comprise a batten to activate signal recording, a power monitor to record nominal signal level and format from said alarm transmitter, a CPU continuously comparing incoming signal with recorded signal, and to alert the user when in-normal signal is received and ignores nominal changing of signal level due to the user change his location.

101. A vehicle alarm transmitting and paging system, as recited in claim 99, wherein said phone pager comprise a two-way device (cellular phone, PCS and two-way pager), wherein said two way device is re-programmed to perform the same functions as said pager.

102. A vehicle alarm transmitting and paging system, as recited in claim 100 wherein said phone pager comprise a two-way device (cellular phone, PCS and two-way pager), wherein said two way device is re-programmed to perform the same functions as said pager.

103. A vehicle alarm transmitting and paging system, as recited in claim 101, comprise a transmitter which can transmit said alarm signal through public network to said pager, a said pager can receive said alarm signal from said alarm transmitter through public network.

104. A vehicle alarm transmitting and paging system, as recited in claim 102, comprise a transmitter which can transmit said alarm signal through public network to said pager, a said pager can receive said alarm signal from said alarm transmitter through public network.

105. A vehicle alarm transmitting and paging system, as recited in claim 103, comprises a transmitter and pager, which can transmit and receive said alarm a public network which is selected from a public network group including a control channel and a paging channel of cellular, PCS and two-way paging systems.

106. A vehicle alarm transmitting and paging system, as recited in claim 104, comprises a transmitter and pager, which can transmit and receive said alarm a public network which is selected from a public network group including a control channel and a paging channel of cellular, PCS and two-way paging systems.

107. A vehicle alarm transmitting and paging system, as recited in claim 105, comprises an in-door antenna and RF radiating cable group in a park structure where said vehicle parked therein, which receive alarm signal from said vehicle first, then transmit said signal to said user through an external antenna of said parking structure.

108. A vehicle alarm transmitting and paging system, as recited in claim 106, comprises an in-door antenna and RF radiating cable group in a park structure where said vehicle parked therein, which receive alarm signal from said vehicle first, then transmit said signal to said user through an external antenna of said parking structure.

109. A vehicle alarm transmitting and paging system, as recited in claim 107, comprises more than one alarm antenna installed on said vehicle to improve RF transaction

110. A vehicle alarm transmitting and paging system, as recited in claim 108, comprises an in-door antenna and RF radiating cable group in a park structure where said vehicle parked therein, which receive alarm signal from said vehicle first, then transmit said signal to said user through an external antenna of said parking structure.

11 1. A vehicle alarm transmitting and paging system, as recited in claim 109, further comprises the following to reduce charges by public transmission

a transceiver (transmitter & receiver) to replace said transmitter to transmit said alarm signal and to receive control signal from said public networks, and

a reprogrammed said transmitter CPU access commands from said user in said vehicle or to respond to commands received by said transceiver from said public networks to switch the transmission format between direct and public mode, and a RF switch connecting to said transceiver to switch said direct transmission format, and

a said two-way device cellular phone, PCS and two-way pager) of said user to send out request by said user in his designation or automatically sends request through said network to switch said transmission mode of said vehicle, wherein said selection depends on said alarm signal level appears on said user's two-way device, wherein selecting direct (private) mode for strong signal and selecting public mode for weak signal.

112. A vehicle alarm transmitting and paging system, as recited in claim 1 10, further comprises the following to reduce charges by public transmission

a reprogrammed said transmitter CPU access commands from said user in said vehicle or to respond to commands received by said transceiver from said public networks to switch the transmission format between direct and public mode, and

a RF switch connecting to said transceiver to switch said direct transmission format, and