KR100926237B1 - Wireless calling method and apparatus using RSSI and time difference algorithm - Google Patents

Abstract

The wireless calling method and apparatus using the RSSI and the time difference algorithm according to the present invention, in addition to the wireless calling function, recognizes the location of the caller together with information on the caller in the server wherever a person with a call-only wireless communication terminal means is located. It is intended to enable context-sensitive responses (eg, emergency rescue for emergencies).

In addition, it is possible to quickly communicate by checking the battery status of the wireless communication terminal means and the network status between each repeater and finding the repeater at the shortest distance according to the RSSI and the time difference algorithm, and transmitting the location information of the caller.

Pager, Relay, Emergency Call

Description

Method and apparatus for wireless calling using RSSI and time difference algorithm {METHOD AND APPARATUS FOR WIRELESS PAGING BY USING RSSI AND TIME DELAY ALGORITHM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication method on a network during radio calling, and more particularly, to a radio calling method and apparatus using RSSI and a time difference algorithm.

Conventional paging systems have a recognition function that enables the caller to know who the caller has the wireless call means, but since the caller's location is not known, for example, if the caller needs the caller's location, Appropriate action was difficult when faced with an urgent need for help.

In addition, even if the caller has a wireless calling means, it does not care about the state of the battery has not been able to achieve its utility when necessary.

In addition, communication based on the existing mesh protocol can be guaranteed reliability, but the link budget is increased, and thus, in the case of an outdoor area or a wide range of areas, which is not a confined space, a plan to compensate for this is required. There is a demand, and the communication server has a burden to solve the problems occurring on the network path as soon as possible to maintain the speed and reliability.

In addition, due to the characteristics of the mesh protocol, an error in RSSI (Receiving Signal Strength Indicate) field is generated when signals are overlapped and are transmitted at almost the same time.

The present invention has been made to solve the above-mentioned problems of the prior art, and is intended to allow the server to know the location information of the caller by calculating the location of the caller by the location information from the wireless calling means.

In addition, the server receives information about the battery level of the caller to facilitate maintenance and repair.

In addition, the RSSI and time difference algorithms attempt to reduce the increase of the link budget in large areas such as outdoors, and to deliver accurate location information of the sender by reducing the error by increasing the reception probability and the RSSI value. .

In order to achieve the above object and to solve the above-mentioned problems of the prior art, the radio calling method using the RSSI and the time difference algorithm according to an embodiment of the present invention comprises the steps of transmitting at least one radio calling means, at least one location information; At least one relay means receiving the transmitted position information to generate recognition information, the relay means transmitting the generated recognition information back to the calling means, the call receiving the recognition information Means for recognizing, based on the received recognition information, a first relay means located at the closest distance to itself, the wireless calling means transmitting the position information only to the recognized first relay means; Transmitting the location information received by the first relay means to a main server.

In addition, the method for controlling a radio call main server using a RSSI and a time difference algorithm according to an embodiment of the present invention comprises the steps of: identifying a signal path from the location information received by the first relay means; displaying the identified path; Monitoring a network condition between the relay means in real time based on the received location information and the identified path, calculating a caller location based on the received location information and the identified path, and the received location information If the emergency alarm signal is received, the step of displaying the calculated caller location and rescue request.

According to the present invention, a radio calling method using RSSI and a time difference algorithm calculates a caller's position based on location information such as RSSI (Receiving Signal Strength Indicate), time delay, etc. from a radio calling means. The server's location can be known from the server.

In addition, the server receives information on the remaining battery level of the caller from the wireless calling means to facilitate maintenance and repair.

In addition, by using RSSI and time difference algorithm, in case of large area such as outdoor, the reception angle range and size of antenna are differently selected according to specific location, and then the location is not changed by general mesh protocol but by step relay to specific relay. Configure a Link Budget that allows information to be delivered.

In addition, it is possible to deliver accurate location information by changing the differential RSSI value to a plurality of step-by-step digital signal and transmit. By providing a directional antenna in each region, it is possible to reduce the error of the RSSI reception value by increasing the reception probability and RSSI value for a signal from one wireless communication terminal means.

Hereinafter, with reference to the accompanying drawings and the contents described in the accompanying drawings will be described in detail preferred embodiments of the present invention, but the present invention is not limited or restricted by the embodiments. Like reference numerals in the drawings denote like elements.

On the other hand, in describing the present invention, when it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terminology used herein is a term used to properly express a preferred embodiment of the present invention, which may vary according to a user, an operator's intention, or a custom in the field to which the present invention belongs. Therefore, the definitions of the terms should be made based on the contents throughout the specification.

1 is a conceptual diagram of a radio calling method and apparatus using RSSI and a time difference algorithm according to an embodiment of the present invention.

Hereinafter, a radio calling method using RSSI and a time difference algorithm according to an embodiment of the present invention will be described with reference to FIG. 1.

The wireless calling method using the RSSI and the time difference algorithm according to the present invention includes a wireless calling means (for example, Pager) 110, a relay means 120, a main server 130, and the like. An example follows.

In this case, the call means 110 has one call button and one emergency alarm button to enable call and emergency alarm functions according to a situation, and the battery state of the wireless call means by a light emitting element or other display means. You can grasp and display the status of battery level and send it.

In addition, the calling means 110 is a portable size and can be basically waterproof, and transmits a unique ID and emergency alarm signal, the remaining battery status of the wireless call means that can be identified by the user, and receives a call signal, and The battery remaining state of the terminal means is displayed through the light emitting device and transmitted together with the above information.

The relay means 120 is composed of a mesh structure or a specific tree structure except for the relay means which may be defined as the first relay means at the closest distance to the calling means.

For example, a person with wireless call means 110 receives a call signal for himself indoors or outdoors, and wherever he or she is in the event of an emergency, via relay means 120 or directly to the main server. In addition to the information on the caller 130 to the caller's location to inform the situation (e.g., emergency rescue for emergency situation, etc.) is possible. In this case, a number of persons having the calling means 110 are provided, and at least one or more wireless calling means 110 transmits the location information. Then, at least one relay means 120 receives the position information transmitted from the call means 110, and uses the radio call means composed of RSSI (Receiving Signal Strength Indicate) information, time information, and an alarm signal. Recognition information including the position information of the and the ACK signal is generated and transmitted back to the calling means.

The calling means 110 receiving the recognition information recognizes the first relay means, which is a relay means that is closest to itself by calculating based on the received recognition information, and converts the position information into the first relay means. Transmits the location information to the main server through the relay means at the shortest distance. In addition, the output of the calling means 110 is smaller than the output of the relay means 120 to facilitate the mesh networking.

The location information received by the relay means 120 is at least one of the unique ID and reception time of the calling means 110, Receiving Signal Strength Indicate (RSSI) information, an emergency alarm signal, and the received location. It also has a means for changing the RSSI information of the information into a plurality of step-by-step digital signals.

In addition, the relay means 120 uses a 2.4 GHz Industrial, Scientific, Medical (ISM) frequency band or UHF (Ultra High Frequency) band allocated by an international organization for industrial, scientific, and medical fields. The communication protocol can be basically implemented as a mesh structure or a specific tree structure, and the number of relay means and relay route can be set arbitrarily and automatically according to the user's environment.

In the case of relaying outdoors or in a large area, the reception angle range and size of the antenna to be applied can be selected differently according to a specific position, and wirelessly the position recognition information is transmitted through the step-by-step relay using a specific relay means rather than a general mesh protocol. It is also possible to configure a link budget.

In this case, due to the characteristics of the mesh protocol, a plurality of differentiated RSSI values are proposed as a method for minimizing an error in RSSI received values that may appear when signals are overlapped and overlapped with neighboring relay means 120. It is possible to transmit accurate location-aware information by changing and transmitting the digital signal of each step, or increase the reception probability and RSSI value of the signal of one call-only communication terminal 110 by installing an antenna having directionality in each region. Can be.

The main server 130 identifies the signal path from the location information received by the first relay means and displays the identified path, and the network state between the relay means based on the received location information and the identified path. Monitor in real time.

In addition, when the caller 110 receives the emergency alarm signal by calculating the caller location based on the received location information and the determined path, the calculated caller location is displayed and the rescue agency requests a rescue. In this case, the above processes do not necessarily have to be performed in a series of orders, and the order of the control method may be executed differently.

2 is a block diagram of a radio calling means using RSSI and a time difference algorithm according to an embodiment of the present invention.

Hereinafter, with reference to FIG. 2, the configuration and role of the radio call means using the RSSI and the time difference algorithm according to the present invention.

The wireless call means 110 according to the present invention includes a transceiver 210, a calculator 220, a first relay means recognizer 230, and the like.

The transceiver 210 transmits an ID unique to the radio call means, an emergency alarm signal, a battery remaining state, receives a call signal, and transmits a battery remaining state of the calling means.

The calculation unit 220 compares the RSSI information value and the time information value among the recognition information received by the radio calling means, calculates the largest RSSI information value and the smallest time information value, and recognizes the first relay means. The unit 230 informs.

The first relay means recognition unit 230 is a relay means located at the closest distance having the largest RSSI information value among the recognition information received by the wireless call means calculated by the calculation unit 220 and the time information having the smallest value. Is determined as the first relay means, and together with the information to be sent only to the first relay means, the network is not configured for signal transmission with other relay means.

3 is a block diagram of a radio call relay means using an RSSI and a time difference algorithm according to an embodiment of the present invention.

Hereinafter, with reference to FIG. 3, the configuration and role of the radio call relay means using the RSSI and the time difference algorithm according to the present invention will be described.

The wireless call repeater 120 according to the present invention includes a transceiver 310, a recognition information generator 320, an RSSI digital signal generator 330, and the like.

The transmitter / receiver 310 may include at least one of an ID, a reception time, an emergency alarm signal, a RSSI (Receiving Signal Strength Indicate), and a battery remaining state signal from the calling means 110. Receive one or more.

The recognition information generation unit 320 includes the ACK signal again by including the location information of the radio call means composed of Receiving Signal Strength Indicate (RSSI) information, the time information, and the alarm signal received by the transceiver 310. When the identification information is transmitted to the calling means 110, it is possible to determine the first relay means.

The RSSI digital signal unit 330 may change the RSSI information among the position information received from the calling means 110 into a plurality of stepped digital signals to minimize the error of the RSSI value so that the position recognition may be more accurate.

4 is a configuration diagram of a radio call main server using RSSI and a time difference algorithm according to an embodiment of the present invention.

Hereinafter, the configuration and role of a radio call main server using RSSI and a time difference algorithm according to the present invention will be described with reference to FIG. 4.

The wireless call main server 130 according to the present invention includes a transceiver 410, a path finding unit 420, a display unit 430, an operation unit 440, a structure request unit 450, a monitoring unit 460, and the like. It is configured to include.

The transmitter / receiver 410 receives location information, a battery remaining status signal, and the like from at least one or more of the relay means 120, and then transmits a request signal and user information from the rescue requester 450 to the rescue agency.

The path detecting unit 420 detects a signal path from the position information received through the transmitting and receiving unit 410, and at this time, detects a transmission path between each relay means and displays the path identified by the display unit 420 later on the basis of this. Done.

The display unit 430 may be a display unit based on a display method such as displaying on a character board or a map on a monitor using an LED (Light Emitting Diode) based on a kind of map set in advance according to a user environment. The location of the identified sender for the calculation at 440 is indicated.

The calculator 440 calculates a caller location based on the received location information and the identified path.

When the rescue requester 450 receives the emergency alarm signal among the received location information, the rescue requester 450 causes the display unit 430 to display the caller location determined by the operation of the operation unit 440, and the transceiver 410. Send a request signal to the rescue agency through.

The monitoring unit 460 monitors the network status between the relay means in real time based on the received location information and the path determined by the path determining unit 420, and an emergency alarm of the information from the wireless calling unit 110. When a signal is received, the request signal is transmitted through the rescue request unit 450, and the position is displayed through the display unit 430.

It also controls the caller position calculation of the operation unit 440 and the transceiver unit 410.

5 is a diagram illustrating execution of an RSSI and a time difference algorithm according to an embodiment of the present invention.

Hereinafter, an implementation using RSSI and a time difference algorithm according to an embodiment of the present invention will be described with reference to FIG. 5.

In the RSSI and time difference algorithm according to the present invention, a signal generated from at least one radio calling means (for example, pager) 110 may be transmitted to neighboring 1, 2, and 3 relay means 120, wherein At least one other relay means 120 is likely to receive the signal of the call means 110, but due to distance and obstacles, it is virtually unlikely to be transmitted to the relay means 4, etc.

In this case, the relay means 1, 2, and 3, which have received the signal of the calling means 110, are wireless calling means composed of RSSI (Receiving Signal Strength Indicate) information, time information, and alarm signal, which is information of an outgoing pager. Recognition information including an ACK signal is generated together with the position information of the ACK signal, and the ACK signal is not transmitted to the main server 130 through the relay means 120.

The calling means 110 receives the identification information including its own ACK signal from the first, second, and third relay means 120, and calculates time information that is a time difference according to the received RSSI value and path. . That is, the calling means 110 has the smallest value of the time information that is the relay time * 2 from the calling means 110 to the relay means 120, and the RSSI coming from the relay means 1, 2, 3, respectively. It recognizes the relay means located closest to itself, which has the largest value.

As shown in FIG. 5, the calling means 110 has a relay time * 2 time from the calling means 110 to the relay means 120 and the first relay means at the closest distance to itself with RSSI information. Recognizes the relay means 1 and transmits the position information signal to the relay means 1 only.

At this time, the other neighboring relay means can receive the signal, but includes information indicating that the signal is sent only to the first relay means so as not to construct a network for signal transmission with other relay means.

The first relay means, which is a first relay means, receives position information of the call means 110 and transmits a signal to a main server through a mesh structure or a specific tree structure, and basically the call means ( The output of the relay means 120 is stronger than the signal output of 110 to facilitate mesh networking.

The wireless calling method using the fixed routing algorithm according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules for performing the operations, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

1 is a conceptual diagram of a radio calling method and apparatus using RSSI and a time difference algorithm according to an embodiment of the present invention.

2 is a block diagram of a radio calling means using RSSI and a time difference algorithm according to an embodiment of the present invention.

3 is a block diagram of a radio call relay means using an RSSI and a time difference algorithm according to an embodiment of the present invention.

4 is a configuration diagram of a radio call main server using RSSI and a time difference algorithm according to an embodiment of the present invention.

5 is a diagram illustrating execution of an RSSI and a time difference algorithm according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: radio calling means;

120: relay means;

130: main server;

230: a first relay means recognition section;

320: recognition information generation unit;

330: RSSI digital signal unit;

Claims (15)

In the radio calling method implemented by a radio calling device, Transmitting, by the radio calling means of the radio calling apparatus, location information; Receiving, by the relay means of the radio calling apparatus, generating the identification information including Receiving Signal Strength Indicate (RSSI) information and time information using the location information; Transmitting, in the relay means, the recognition information to the radio calling means; In the radio calling means receiving the recognition information, determining, by the first relay means, a relay means having the largest RSSI information value and the smallest time information; Transmitting, by the radio calling means, the location information to the recognized first relay means; And Transmitting, by the first relay means, the received location information to a main server Wireless calling method comprising a. The method of claim 1, Transmitting, at the radio calling means, at least one of a unique ID, an emergency alarm signal, or a battery level status to the first relay means; And Displaying, by the wireless calling means, a battery remaining state Wireless calling method further comprising. delete The method of claim 1, The time information, And twice the relay time from the radio calling means to the relay means. delete The method of claim 1, The relay means and the first relay means, Means for converting said RSSI information into a digital signal. The method of claim 1, The relay means and the first relay means, Wireless calling method characterized by using the 2.4GHz ISM frequency band or UHF band. The method of claim 1, The relay means and the first relay means, And a directional antenna. The method of claim 1, The relay means and the first relay means, And a plurality of antenna reception angle ranges and a plurality of antenna sizes. The method of claim 1, And the output of the radio calling means is smaller than the output of the relay means. The method of claim 1, Identifying, by the main server, a signal path from the location information received by the first relay means; Calculating, at the main server, a caller location based on the received location information and the identified signal path; And At the main server, when the received location information includes an emergency alarm signal, displaying and calculating the requested caller location; Wireless calling method further comprising. The method of claim 11, Transmitting, by the main server, a warning signal to the wireless calling means according to the battery remaining state when the received position information includes a battery remaining state; Wireless calling method further comprising. A computer-readable recording medium having recorded thereon a program for performing the method of any one of claims 1, 2, 4, and 6-12. In the wireless calling device, Wireless calling means for transmitting location information; And Relay means for receiving the position information, using the position information, generating recognition information including RSSI information and time information, and transmitting the recognition information to the radio calling means; Including, The wireless calling means that has received the recognition information, The first relay means by determining and recognizing, by the first relay means, a relay means having the largest RSSI information value and the smallest time information, and transmitting the position information to the recognized first relay means. And to transmit the location information to a main server. The method of claim 14, The radio call means, And transmitting the remaining battery level to the first relay means, and displaying the remaining battery level.

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