CA2469377A1 - Wireless screen systems and protocols - Google Patents
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- CA2469377A1 CA2469377A1 CA 2469377 CA2469377A CA2469377A1 CA 2469377 A1 CA2469377 A1 CA 2469377A1 CA 2469377 CA2469377 CA 2469377 CA 2469377 A CA2469377 A CA 2469377A CA 2469377 A1 CA2469377 A1 CA 2469377A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V15/00—Tags attached to, or associated with, an object, in order to enable detection of the object
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
Screening systems and protocols are disclosed that are used to screen and identify objects with RFID tags. The screening categorization, RF transmitting-receiving methods and communication protocols are dynamically programmable. An object screening system includes one control centre, one or more broadcast means, one or more tags and one or more detectors. The control centre stores registered tag data including tag IDs and attached object properties, categorizes all tags based on detection requests, and broadcasts commands to tags and detectors, through the broadcast means, in order to set tags' status and operating mode, and synchronize detectors' settings. A tag reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag.
Communication protocols are disclosed that cipher and decipher RF signal massages from a control centre to tags and detectors, from a tag to a detector, and communications between a tag and a detectors, so as to make the object screening system confidential, robust and reliable.
Communication protocols are disclosed that cipher and decipher RF signal massages from a control centre to tags and detectors, from a tag to a detector, and communications between a tag and a detectors, so as to make the object screening system confidential, robust and reliable.
Description
WIRELESS SCREEN SYSTEMS AND PROTOCOLS
TECHNICAL FIELD
This invention relates to method for screening movable objects with RFID tags, such as vehicles.
BACKGROUND
Screening systems for enhancing safety are widely used at important facilities, such as airports, to detect any dangerous or illegal materials in luggage or with passengers.
Micro electronic identification chips are also known to be so small that they can be embedded in human bodies. With explorations on GPS technologies, many methods have been developed to track objects, such as animals, vehicles, materials, and so on.
The vehicle tracking techniques make the tracked vehicles safer. However, the dangerous threats to a community are often from untracked vehicles. There are a number of problems in the vehicle tracking techniques for enhancing community safety.
The first problem is that it is impossible to track all vehicles due to bottlenecks in computer speeds, data storage capacities and communication network abilities. The second problem is that data collected from tracking process is huge and most of the data is useless.
The micro electronic identification chip idea is not quite suitable for identify individual human being. It is because that a chip embedded in human body may hurt surrounding body tissues, cause the carrier's safety, and damage the carrier's privacy and confidence.
There is a need for simple, high-speed and accurate object screening systems to screen and identify any movable objects, such as vehicles, at interested passes, so as to reduce threats to community safeties.
SUMMARY OF INVENTION
The invention provides an object screening system and protocols which have advantages in enhancing community safety significantly to a certain level in a large area. The first aspect of the invention provides a system for screening vehicles within a community.
The system comprises one control centre, one or more broadcast means, one or more tags embedded inside local vehicles and one or more detectors. A tag is a RFID
device, either built in a new vehicle or installed into a vehicle, under certain regulations.
The tag in a vehicle has to be registered in the control centre during installing or first-time selling.
The identification number of the tag is unique within the community and may serves as tag address. When transferring ownership of a vehicle with a tag, it is mandatory for its older owner, new owner or both to make sure to update the changes to the control centre.
The control centre stores registered tag data including tag IDs, vehicle's serial numbers and plate numbers and their ownerships, categorizes all tags based on screening or detecting requests, and broadcasts commands to tags and detectors through the broadcast means in order to set tags' status and operating mode and to synchronize detectors' settings. The broadcast means can be any kind of RF broadcasts. A tag responds to commands from the control centre via the broadcast means and reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag through an input/output interface.
The tag has an optional GPS receiver and optional inertial sensing accessories to record its movement and detect object collision and other trouble conditions. The detector has optional broadcast accessories to issue commands to all tags in its vicinity.
Another aspect of the invention provides a system for screening vehicles worldwide. The system comprises one control centre, one or more broadcast means, one or more tags embedded in vehicles and one or more detectors. A tag is a RFID device, either built in a new vehicle or installed into a vehicle, under regulations of a nation, nations or United Nations. The tag in a vehicle has to be registered in the control centre during installing or first-time selling. The identification number of the tag is unique worldwide and may serves as tag address. When transferring ownership of a vehicle with a tag, it is mandatory for its older owner, new owner or both to make sure to update the changes to the control centre. The control centre stores registered tag data including tag IDs, vehicle's serial numbers and plate numbers and their ownerships, categorizes all tags based on screening or detecting requests, and broadcasts commands to tags and detectors through the broadcast means in order to set tags' status and operating mode and to synchronize detectors' settings. The broadcast means can be any kind of RF
broadcasts, such as satellite broadcast for GPS. A tag responds to commands from the control centre via the broadcast means and reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag through an input/output interface. The tag has an optional GPS
receiver and optional inertial sensing accessories to record its movement and detect object collision and other trouble conditions. The detector has optional broadcast accessories to issue commands to all tags in its vicinity.
Communication protocols provided in the invention are used to cipher and decipher RF
signals, such as that from a control centre to tags and detectors, that from a detector to tags, that from a tag to a detector, and a two-way communication between a tag and a detector, in an object screening system provided in the invention. The screening categories, RF transmitting-receiving methods and communication protocols are dynamically programmable, so as to make the object screening system confidential, robust and reliable.
Typical applications of object screening systems and protocols provided in the invention include 1) searching for stolen vehicles; 2) blocking un-registered vehicles for a special event; 3) controlling traffic; and 4) rescuing troubled vehicles.
BRIEF DESCRIPTION OF THE DRAWING
In drawing which illustrates specific embodiment of the invention, but which shoult not be construed as restricting the spirit or scope of the invention in any way:
FIG. 1 is a diagram of an object screening system and protocols DESCRIPTION
The invention provides object screening systems and protocols that are used to screen movable objects and identify the interested ones for the purpose of enhancing community safety. The invention is described with four typical applications in following.
Before starting description of any applications, assume an object screening system for vehicles is well established in an area for each of these typical applications, as shown in FIG.1. The object screening system comprises one control centre 110, one or more broadcast means 120 that are connected with the control centre 110 and able to broadcast RF signals 121 with commands from the control centre 110, one or more tags 130a, 130b, 130c, 130d and 130n that are available on some vehicles, and one or more detectors 140. The tags are registered in the control centre 110 and able to receive the RF
signals 121 from the broadcast means 120, to transmit a RF signal 131 based on the commands from the control centre 110. The commands from the control centre 110 are able to target either all of tags, specific groups of tags, or an individual tag. A detector 140 is able to receive the RF signals 121 from the broadcast means 120, to receive the RF
signal 131 from the tag 130a, to set up a two-way RF communication 141 with the interested tag 130a, to broadcast RF signals 142 to the tags 130a and 130b in its vicinity, and to output screening results through an input/output interface.
The first typical application of an object screening system is to search stolen vehicles.
When a vehicle has been stolen, its owner is responsible to report the loss to the control centre immediately. The control centre will categorize the tag of the vehicle with a status marked as "stolen". Then, the control centre broadcasts commands, including tag's ID
and instructions for the tag, out to reach all tags in the area. The tag in the stolen vehicle receives the commands from control centre, changes the status and operating mode based on the instructions and emits RF signal marked as "stolen". A detector will pick up the signal from the stolen vehicle when the stolen vehicle passes by and indicates the vehicle as a stolen one. The tag may has a backup power supply and should not be disabled or destroyed easily. There is always a chance that the tag has been disabled. So, any vehicles will be suspected as stolen ones if they do not emit right RF
signals. It will not be a problem if tags are mandatory for all vehicles for certain kinds.
The second typical application of an object screening system is to block un-registered vehicles for a special event. When a special event is held at a place, the safety could be improved significantly if only the registered vehicles are allowed to the place and the surrounding area. For example, thousands of registered attendants will take their thousands of vehicles to a event. The organizers and attendants are responsible to register all their vehicles for the event and report to the control centre. The control centre will categorize the tag of these registered vehicles with a status marked as "Event Attendant".
Then the control centre broadcasts commands out to reach all tags in the area during certain periods of entering time. The tags in the vehicles registered for the event receive the commands from the control centre, change the status and operating mode based on the instructions and emit RF signal marked as "Event Attendant". The detectors will pick up the signals from vehicles and allow the vehicles emitting the correct RF
signal to pass at event entrances. Any other vehicles will be blocked or turned away which emit either wrong RF signal or nothing. Communication protocols are designed to make the object screening system robust and reliable.
The third typical application of an object screening system is to control traffic. All vehicles from the same direction often need to be split for sakes of construction conditions, community safety, vehicle types and vehicle status. For example, there are coming-home vehicles and going-abroad vehicles in the same traffic at a border between two countries. These two kinds of vehicles need to pass through two different kinds of gates for customs declaration. The tags in all of these vehicles may not need to be registered at the control centre. The control centre broadcasts common commands out to reach all tags continuously. The tags in these vehicles receive the common commands from the control centre and a special command requesting nationality from the broadcast accessories of a detector in their vicinity, and emit RF signals marked with nationality information. The detector picks ug the signal from a vehicle, outputs a result with nationality information of the vehicle and guides the vehicle to a designated gate.
The fourth typical application of an object screening system is to rescue troubled vehicles. The tags in the object screening system have GPS receivers and inertial sensing accessories to record vehicle movement and detect vehicle collision and other trouble conditions. For example, one vehicle has an accident and its driver and all passengers if any may lost consciousness. The tag in the vehicle is able to judge if the vehicle is in trouble by detecting the impact, vehicle's gesture and doors' status. There is a backup power supply to the tag. The tag emits a RF signal based on the ciphering rules from the control centre. A detector in a patrol vehicle picks up the signal from the tag when both vehicles come close. The detector sets up a two-way communication link to the tag, reads data from the tag including the location information, and outputs the results through its input/output interface.
As will be apparent to those skilled in the art in the light of the foregoing disclosure.
Many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
(What is claimed will be filed later) s
TECHNICAL FIELD
This invention relates to method for screening movable objects with RFID tags, such as vehicles.
BACKGROUND
Screening systems for enhancing safety are widely used at important facilities, such as airports, to detect any dangerous or illegal materials in luggage or with passengers.
Micro electronic identification chips are also known to be so small that they can be embedded in human bodies. With explorations on GPS technologies, many methods have been developed to track objects, such as animals, vehicles, materials, and so on.
The vehicle tracking techniques make the tracked vehicles safer. However, the dangerous threats to a community are often from untracked vehicles. There are a number of problems in the vehicle tracking techniques for enhancing community safety.
The first problem is that it is impossible to track all vehicles due to bottlenecks in computer speeds, data storage capacities and communication network abilities. The second problem is that data collected from tracking process is huge and most of the data is useless.
The micro electronic identification chip idea is not quite suitable for identify individual human being. It is because that a chip embedded in human body may hurt surrounding body tissues, cause the carrier's safety, and damage the carrier's privacy and confidence.
There is a need for simple, high-speed and accurate object screening systems to screen and identify any movable objects, such as vehicles, at interested passes, so as to reduce threats to community safeties.
SUMMARY OF INVENTION
The invention provides an object screening system and protocols which have advantages in enhancing community safety significantly to a certain level in a large area. The first aspect of the invention provides a system for screening vehicles within a community.
The system comprises one control centre, one or more broadcast means, one or more tags embedded inside local vehicles and one or more detectors. A tag is a RFID
device, either built in a new vehicle or installed into a vehicle, under certain regulations.
The tag in a vehicle has to be registered in the control centre during installing or first-time selling.
The identification number of the tag is unique within the community and may serves as tag address. When transferring ownership of a vehicle with a tag, it is mandatory for its older owner, new owner or both to make sure to update the changes to the control centre.
The control centre stores registered tag data including tag IDs, vehicle's serial numbers and plate numbers and their ownerships, categorizes all tags based on screening or detecting requests, and broadcasts commands to tags and detectors through the broadcast means in order to set tags' status and operating mode and to synchronize detectors' settings. The broadcast means can be any kind of RF broadcasts. A tag responds to commands from the control centre via the broadcast means and reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag through an input/output interface.
The tag has an optional GPS receiver and optional inertial sensing accessories to record its movement and detect object collision and other trouble conditions. The detector has optional broadcast accessories to issue commands to all tags in its vicinity.
Another aspect of the invention provides a system for screening vehicles worldwide. The system comprises one control centre, one or more broadcast means, one or more tags embedded in vehicles and one or more detectors. A tag is a RFID device, either built in a new vehicle or installed into a vehicle, under regulations of a nation, nations or United Nations. The tag in a vehicle has to be registered in the control centre during installing or first-time selling. The identification number of the tag is unique worldwide and may serves as tag address. When transferring ownership of a vehicle with a tag, it is mandatory for its older owner, new owner or both to make sure to update the changes to the control centre. The control centre stores registered tag data including tag IDs, vehicle's serial numbers and plate numbers and their ownerships, categorizes all tags based on screening or detecting requests, and broadcasts commands to tags and detectors through the broadcast means in order to set tags' status and operating mode and to synchronize detectors' settings. The broadcast means can be any kind of RF
broadcasts, such as satellite broadcast for GPS. A tag responds to commands from the control centre via the broadcast means and reports its status to a detector in its vicinity, and the detector selectively sets up a two-way communication with the tag and outputs detected results from the tag through an input/output interface. The tag has an optional GPS
receiver and optional inertial sensing accessories to record its movement and detect object collision and other trouble conditions. The detector has optional broadcast accessories to issue commands to all tags in its vicinity.
Communication protocols provided in the invention are used to cipher and decipher RF
signals, such as that from a control centre to tags and detectors, that from a detector to tags, that from a tag to a detector, and a two-way communication between a tag and a detector, in an object screening system provided in the invention. The screening categories, RF transmitting-receiving methods and communication protocols are dynamically programmable, so as to make the object screening system confidential, robust and reliable.
Typical applications of object screening systems and protocols provided in the invention include 1) searching for stolen vehicles; 2) blocking un-registered vehicles for a special event; 3) controlling traffic; and 4) rescuing troubled vehicles.
BRIEF DESCRIPTION OF THE DRAWING
In drawing which illustrates specific embodiment of the invention, but which shoult not be construed as restricting the spirit or scope of the invention in any way:
FIG. 1 is a diagram of an object screening system and protocols DESCRIPTION
The invention provides object screening systems and protocols that are used to screen movable objects and identify the interested ones for the purpose of enhancing community safety. The invention is described with four typical applications in following.
Before starting description of any applications, assume an object screening system for vehicles is well established in an area for each of these typical applications, as shown in FIG.1. The object screening system comprises one control centre 110, one or more broadcast means 120 that are connected with the control centre 110 and able to broadcast RF signals 121 with commands from the control centre 110, one or more tags 130a, 130b, 130c, 130d and 130n that are available on some vehicles, and one or more detectors 140. The tags are registered in the control centre 110 and able to receive the RF
signals 121 from the broadcast means 120, to transmit a RF signal 131 based on the commands from the control centre 110. The commands from the control centre 110 are able to target either all of tags, specific groups of tags, or an individual tag. A detector 140 is able to receive the RF signals 121 from the broadcast means 120, to receive the RF
signal 131 from the tag 130a, to set up a two-way RF communication 141 with the interested tag 130a, to broadcast RF signals 142 to the tags 130a and 130b in its vicinity, and to output screening results through an input/output interface.
The first typical application of an object screening system is to search stolen vehicles.
When a vehicle has been stolen, its owner is responsible to report the loss to the control centre immediately. The control centre will categorize the tag of the vehicle with a status marked as "stolen". Then, the control centre broadcasts commands, including tag's ID
and instructions for the tag, out to reach all tags in the area. The tag in the stolen vehicle receives the commands from control centre, changes the status and operating mode based on the instructions and emits RF signal marked as "stolen". A detector will pick up the signal from the stolen vehicle when the stolen vehicle passes by and indicates the vehicle as a stolen one. The tag may has a backup power supply and should not be disabled or destroyed easily. There is always a chance that the tag has been disabled. So, any vehicles will be suspected as stolen ones if they do not emit right RF
signals. It will not be a problem if tags are mandatory for all vehicles for certain kinds.
The second typical application of an object screening system is to block un-registered vehicles for a special event. When a special event is held at a place, the safety could be improved significantly if only the registered vehicles are allowed to the place and the surrounding area. For example, thousands of registered attendants will take their thousands of vehicles to a event. The organizers and attendants are responsible to register all their vehicles for the event and report to the control centre. The control centre will categorize the tag of these registered vehicles with a status marked as "Event Attendant".
Then the control centre broadcasts commands out to reach all tags in the area during certain periods of entering time. The tags in the vehicles registered for the event receive the commands from the control centre, change the status and operating mode based on the instructions and emit RF signal marked as "Event Attendant". The detectors will pick up the signals from vehicles and allow the vehicles emitting the correct RF
signal to pass at event entrances. Any other vehicles will be blocked or turned away which emit either wrong RF signal or nothing. Communication protocols are designed to make the object screening system robust and reliable.
The third typical application of an object screening system is to control traffic. All vehicles from the same direction often need to be split for sakes of construction conditions, community safety, vehicle types and vehicle status. For example, there are coming-home vehicles and going-abroad vehicles in the same traffic at a border between two countries. These two kinds of vehicles need to pass through two different kinds of gates for customs declaration. The tags in all of these vehicles may not need to be registered at the control centre. The control centre broadcasts common commands out to reach all tags continuously. The tags in these vehicles receive the common commands from the control centre and a special command requesting nationality from the broadcast accessories of a detector in their vicinity, and emit RF signals marked with nationality information. The detector picks ug the signal from a vehicle, outputs a result with nationality information of the vehicle and guides the vehicle to a designated gate.
The fourth typical application of an object screening system is to rescue troubled vehicles. The tags in the object screening system have GPS receivers and inertial sensing accessories to record vehicle movement and detect vehicle collision and other trouble conditions. For example, one vehicle has an accident and its driver and all passengers if any may lost consciousness. The tag in the vehicle is able to judge if the vehicle is in trouble by detecting the impact, vehicle's gesture and doors' status. There is a backup power supply to the tag. The tag emits a RF signal based on the ciphering rules from the control centre. A detector in a patrol vehicle picks up the signal from the tag when both vehicles come close. The detector sets up a two-way communication link to the tag, reads data from the tag including the location information, and outputs the results through its input/output interface.
As will be apparent to those skilled in the art in the light of the foregoing disclosure.
Many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
(What is claimed will be filed later) s
Claims (22)
1. A system for screening vehicles within a geographical area, the system comprising:
a). one control centre, for storing vehicles' registration, responding requests from either vehicles' owners or designated government officers, and broadcasting control-centre commands;
b). one or more broadcast means, for broadcasting the control-centre commands from the control centre over the geographical area in RF frequencies;
c). one or more tags, attached to vehicles, each of the tags comprising: data memory for storing tag data including tag identification number serving as communication address and tag status history; one RF communication means having three communication channels for respectively receiving the control-centre commands from the control centre through the broadcast means, emitting tag message in random time intervals, and responding requests in two-way communication in slave mode; a clock for stamping received commands with time; and a timer for resetting the tag itself back to a default operation mode in a period of time specified in received commands;
d). one or more detectors, either carried by men or mounted on vehicles or stationary platforms, each of the detectors comprising: data memory for storing detector data including detector identification number serving as communication address and authorization data; one RF communication means having three communication channels for respectively receiving the control-centre commands from the control centre through the broadcast means, monitoring the tag message emitted from tags in its vicinity, and setting up a two-way communication in master mode with a particular tag in a close communication range and retrieving the tag data from the tag; an interface for configuring and authorizing the detector, making commands to the tag, displaying detecting results and the tag data, and remotely communicating with either the control centre or any government offices; and a timer for disabling the detector in a specified period of time defined in each authorization;
e). an algorithm, for dynamically encrypting and decrypting the control-centre commands from the control centre to the tags and the detectors, the tag message emitted from the tags and received at the detectors, and the two-way communication between a tag and a detector.
a). one control centre, for storing vehicles' registration, responding requests from either vehicles' owners or designated government officers, and broadcasting control-centre commands;
b). one or more broadcast means, for broadcasting the control-centre commands from the control centre over the geographical area in RF frequencies;
c). one or more tags, attached to vehicles, each of the tags comprising: data memory for storing tag data including tag identification number serving as communication address and tag status history; one RF communication means having three communication channels for respectively receiving the control-centre commands from the control centre through the broadcast means, emitting tag message in random time intervals, and responding requests in two-way communication in slave mode; a clock for stamping received commands with time; and a timer for resetting the tag itself back to a default operation mode in a period of time specified in received commands;
d). one or more detectors, either carried by men or mounted on vehicles or stationary platforms, each of the detectors comprising: data memory for storing detector data including detector identification number serving as communication address and authorization data; one RF communication means having three communication channels for respectively receiving the control-centre commands from the control centre through the broadcast means, monitoring the tag message emitted from tags in its vicinity, and setting up a two-way communication in master mode with a particular tag in a close communication range and retrieving the tag data from the tag; an interface for configuring and authorizing the detector, making commands to the tag, displaying detecting results and the tag data, and remotely communicating with either the control centre or any government offices; and a timer for disabling the detector in a specified period of time defined in each authorization;
e). an algorithm, for dynamically encrypting and decrypting the control-centre commands from the control centre to the tags and the detectors, the tag message emitted from the tags and received at the detectors, and the two-way communication between a tag and a detector.
2. A system, as in claim 1, wherein each of said tags further comprises one RF
communication channel for receiving commands from a second command source;
each of said detectors further comprises one RF communication channel for transmitting commands to the tags in its vicinity as the second command source; and said algorithm is further for dynamically encrypting and decrypting the information in the second command source.
communication channel for receiving commands from a second command source;
each of said detectors further comprises one RF communication channel for transmitting commands to the tags in its vicinity as the second command source; and said algorithm is further for dynamically encrypting and decrypting the information in the second command source.
3. A system, as in claim 1, wherein each of said tags further comprises a plurality of RF communication channels for emitting the tag message in a combination pattern designated in the commands from either the control centre or the second command source; and each of said detectors further comprises a plurality of RF
communication channels for monitoring the tag message emitted from the plurality of RF
communication channels of the tags in its vicinity.
communication channels for monitoring the tag message emitted from the plurality of RF
communication channels of the tags in its vicinity.
4. A system, as in claim 1, wherein said tag identification number, used as tag communication address, comprises a plurality of information fields for including and grouping information of vehicle's serial number, plate number, colour code and model number, the ownership data such as owner's postal code and country code, and other meaningful characters for identification.
5. A system, as in claim 1, wherein said detector identification number, used as detector communication address, comprises a plurality of information fields for including and grouping information of detector's serial number and model number, the ownership data such as owner's postal code and division code, and other meaningful characters for classification.
6. A system, as in claim 1, wherein said control-centre command comprises screening code, indicia of duration time, and indicia of operation mode including indicia of the encrypting and decrypting methods of said algorithm.
7. A system, as in claim 1, wherein said control-centre commands are inserted in communication data frames with a destination address, derived from the tag identification numbers and the detector identification numbers, for targeting either all of the tags, all of the detectors, a specific group of the tags, a specific group of the detectors, an individual tag or an individual detector.
8. A system, as in claim 6 and 7, wherein the particular tag, targeted by the destination address with the control-centre commands from the control centre, sets its operating mode including the encrypting and decrypting methods, updates the tag message with the screening code in the commands, and emits the tag message in random time intervals continuously for the duration time defined in the commands.
9. A system, as in claim 2, wherein the command from said second command source comprises screening code, indicia of duration time, and indicia of operation mode including indicia of the encrypting and decrypting methods of said algorithm.
10. A system, as in claim 2, wherein the command from said second command source are inserted in communication data frames with a destination address, derived from the tag identification numbers, for targeting either all of the tags, a specific group of the tags, or an individual tag.
11. A system, as in claim 9 and 10, wherein the particular tag, targeted by the destination address with the commands from the second command source, sets its operating mode including the encrypting and decrypting methods, updates the tag message with the screening code in the commands, and emits the tag message in random time intervals continuously for the duration time defined in the commands.
12. A system, as in claim 1, wherein said tag message comprises indicia of communication address being ready for the two-way communication with a detector.
13. A system, as in claim 1, wherein the random time intervals are in a range that the longest interval should be short enough for the tag to emit its tag message at least twice to a detector during the tag and the detector's approaching to each other.
14. A system, as in claim 1, wherein said tags further comprises an interface for instructing vehicle's operator.
15. A system, as in claim 1, wherein each of said tags further comprises a GPS
receiver for determining its location.
receiver for determining its location.
16. A system, as in claim 1, wherein each of said detectors further comprises a GPS
receiver for determining its location.
receiver for determining its location.
17. A system, as in claim 1, wherein each of said tags further comprises inertial sensing accessories for determining vehicle's moving trajectory and trouble conditions.
18. A system, as in claim 1, wherein the tags in said default operation mode emit dummy tag message comprising a dummy screening code and indicia of communication address ready for the two-way communication with a detector.
19. A system, as in claim 18, wherein said control centre broadcasts the dummy screening code to all tags and all detectors. The value of the dummy code changes with time to synchronize all detectors dynamically.
20. A system, as in claim 1, wherein said tags comprise backup power accessories.
21. A system, as in claim 1, wherein said detectors are administrated in a plurality of ranks in a tree structure that a detector in a higher rank can authorize and revitalize any detectors in the lower ranks within its branch.
22. A system, as in claim 6 and 7, wherein the particular detector, targeted by the destination address with the control-centre commands from the control centre, sets its operating mode including the encrypting and decrypting methods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2469377 CA2469377A1 (en) | 2004-05-31 | 2004-05-31 | Wireless screen systems and protocols |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2469377 CA2469377A1 (en) | 2004-05-31 | 2004-05-31 | Wireless screen systems and protocols |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2469377A1 true CA2469377A1 (en) | 2005-11-30 |
Family
ID=35452291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2469377 Abandoned CA2469377A1 (en) | 2004-05-31 | 2004-05-31 | Wireless screen systems and protocols |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2469377A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006048714A1 (en) * | 2004-11-01 | 2006-05-11 | Nokia Corporation | Methods, systems, devices and computer program products for providing user-access to broadcast content in combination with short-range communication content |
-
2004
- 2004-05-31 CA CA 2469377 patent/CA2469377A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006048714A1 (en) * | 2004-11-01 | 2006-05-11 | Nokia Corporation | Methods, systems, devices and computer program products for providing user-access to broadcast content in combination with short-range communication content |
| US7536151B2 (en) | 2004-11-01 | 2009-05-19 | Nokia Corporation | Methods, systems, devices and computer program products for providing user-access to broadcast content in combination with short-range communication content |
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