KR20160131646A - Communication device and control method thereof - Google Patents

Abstract

The present invention relates to a communication device capable of enhancing positioning accuracy and positioning time performance by adaptively selecting an optimum communication device (AP) for positioning a tag device in a tag device positioning technique (TWR positioning technique) A method of operating a communication device is proposed.

Description

[0001] COMMUNICATION DEVICE AND CONTROL METHOD [0002] BACKGROUND OF THE INVENTION [0003]

The present invention relates to a tag device positioning technique for measuring a position of a tag device based on an operation of receiving a tag signal from a tag device in a communication device (AP), and more particularly, And a technique capable of increasing the positioning accuracy and the positioning time performance by adaptively selecting a communication device (AP).

Currently, the Real Time Location Service (RTLS), which provides various information according to the real time location of moving objects, is a very familiar service that is commonly used.

In an RTLS system providing such RTLS, basically, the position of the moving object must be measured (grasped).

At this time, among the positioning techniques for measuring the position of the moving object (hereinafter referred to as the tag device) that can be used for the RTLS, based on the operation of receiving the tag signal from the tag device at the AP (Access Point) (TWR: Two Way Ranging).

Such a TWR positioning technique is based on the assumption that the tag apparatus receives an AP list from a specific AP located nearby, and transmits and receives a tag signal, that is, a positioning message, to each of the APs included in the AP list, It is a technique that measures (grasps) the position of the tag device based on the delay of the message round trip time between APs.

That is, in the case of the TWR positioning technique, it is known that the performance of the positioning accuracy and the positioning time largely depend on the AP list in which the tag device transmits and receives the message.

However, in the existing AP list providing method, when the tag device broadcasts a search signal to know an AP to which a message for positioning is to be transmitted, the AP list providing function of the nearby APs receiving the search signal And a list of APs stored in the specific APs is provided to the tag device.

That is, if the search signal of the tag device is received by the specific AP, the existing AP list providing method can not obtain a fixed AP list Is received from a specific AP.

As a result, the existing AP list providing method has a problem that the performance of the positioning accuracy and the positioning time may deteriorate due to message transmission / reception with an inappropriate AP when positioning the tag device.

Accordingly, in the present invention, a method for improving positioning accuracy and positioning time performance by adaptively selecting an optimum communication apparatus (AP) for positioning the tag apparatus is proposed.

SUMMARY OF THE INVENTION The object of the present invention is to provide a tag device positioning technique (TWR positioning technique) that is capable of providing an optimal communication device (AP) So as to improve the positioning accuracy and the performance of the positioning time, and to provide an operation method of the communication apparatus.

According to a first aspect of the present invention, there is provided a communication apparatus comprising: a reporting unit reporting signal reception information according to reception of a search signal to a server when a search signal is received from a specific tag apparatus; A list receiver for receiving from the server a communication device list generated based on signal reception information reported from a plurality of communication devices that have received a search signal of the specific tag device; And a list providing unit for providing the communication device list to the specific tag device and enabling the specific tag device to perform positioning using the communication device list.

Preferably, the communication device list includes, among the plurality of communication devices, a signal reception intensity of the search signal measured at each of the plurality of communication devices identified based on the signal reception information, And / or location of at least one of the plurality of communication devices.

Preferably, the search signal from the specific tag device has been moved by a predetermined constant range or more from a position initially positioned based on a positioning result using the communication device list, The communication device may be received from the specific tag device when there is a communication device in which the signal reception intensity of the communication device included in the communication device list measured the search signal of the specific tag device falls below a predetermined threshold value.

Preferably, the at least a part of the communication apparatuses can be sequentially selected from among the plurality of communication apparatuses, from the communication apparatuses having the largest signal reception intensity of the search signals.

Preferably, the at least some of the plurality of communication apparatuses are configured to perform communication between the communication apparatus having the highest signal-receiving intensity of the search signal and the communication apparatus having the highest signal-receiving intensity of the search signal, The devices can be selected sequentially.

Advantageously, the at least a part of the communication apparatuses includes a communication apparatus having a communication apparatus having a highest signal receiving intensity of the search signal among the plurality of communication apparatuses, a communication apparatus having a lowest dilution of precision (DOP) May be a communication device belonging to a device combination.

According to a second aspect of the present invention, there is provided a method for operating a communication device, comprising: receiving, from a candidate communication device that has received a search signal from a specific tag device, information for confirming signal reception information step; An intensity checking step of checking a signal reception intensity of the search signal measured by each of the candidate communication devices based on the signal reception information; Selecting at least a candidate communication apparatus among the candidate communication apparatuses based on at least one of a signal receiving intensity of the search signal measured at each of the candidate communication apparatuses and a position of each of the candidate communication apparatuses; And a list providing step of generating and providing a communication device list including the selected candidate communication device.

Preferably, the method further includes the step of acquiring a communication device list generated in the other communication device, when there is another communication device that has generated the communication device list in association with the specific tag device; The selecting step may select at least a part of the candidate communication devices among the candidate communication devices and the candidate communication devices included in the obtained communication device list when acquiring the communication device list generated by the other communication device .

Preferably, the communication apparatus further includes a communication unit that transmits a signal indicating that the signal reception intensity measured by the search signal of the specific tag apparatus is larger than that of the other communication apparatus, The number of devices may be greater.

Preferably, the communication device may include the communication device when the communication device also receives the search signal of the specific tag device.

Thus, according to the operation method of the communication device and the communication device according to the present invention, in the tag device positioning technique (TWR positioning technique), by optimally selecting the optimum communication device (AP) for positioning the tag device, Accuracy and positioning time are improved.

1 is a block diagram illustrating an RTLS system including a communication apparatus according to a preferred embodiment of the present invention.
2 is a block diagram showing a configuration of a tag device according to a first preferred embodiment of the present invention.
3 is a block diagram showing a configuration of a tag apparatus according to a second preferred embodiment of the present invention.
FIG. 4 is an exemplary diagram illustrating a process of providing a list of APs in an RTLS system according to a first preferred embodiment of the present invention.
5 is a flowchart illustrating an operation method of a communication apparatus according to a second preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating an RTLS system including a communication apparatus according to a preferred embodiment of the present invention.

As shown in FIG. 1, a real time location service (RTLS) system according to a preferred embodiment of the present invention includes a moving object or tag device that can be used for RTLS and a communication device for providing RTLS.

The tag device 10 may be in the form of a mobile phone, a mobile device, or the like, as a movable object that can be used for RTLS.

The communication device is an apparatus for providing RTLS to the tag device 10 through a wireless communication method, and may be an AP (Access Point) and a device such as a (macro or small) base station.

Hereinafter, for convenience of description, the communication apparatus will be referred to as an AP and it is assumed that 10 communication apparatuses, that is, AP1, 2, 3, ..., AP10, are located around the tag apparatus 10 as shown in FIG. I will explain it.

At present, in the RTLS system, basically, the position of the tag device must be measured (grasped).

Among the positioning techniques for measuring the position of the tag device, there is a TWR (Two Way Ranging) technique for measuring the position of the tag device based on the operation of receiving the tag signal from the tag device at the communication device AP .

The TWR positioning technique will be briefly described with reference to the tag device 10. It is assumed that the tag device 10 receives an AP list from a specific AP (for example, AP5) located in the vicinity.

Under this assumption, the tag apparatus 10 transmits a tag signal, that is, a Poll message to each AP (e.g., AP1,2,3,4,5) belonging to the AP list, AP1, 2, 3, 4, 5) transmits a tag signal, that is, a Response message, to the tag apparatus 10. Upon receiving the Response message, 4, 5).

Each AP (for example, AP1, 2, 3, 4, 5) provides a round trip time delay (reception time - transmission time) of each message transmitted and received by the tag device 10 to a positioning server . At this time, according to the distance between the tag device 10 and each AP (for example, AP1,2,3,4,5), Round Trip time delay (reception time-transmission time point) 2, 3, 4, 5).

Accordingly, the positioning server (not shown) can measure (grasp) the position of the tag device 10 based on the triangle positioning technique based on the message round trip time delay provided from each AP 1, AP 2, AP 3, AP 4, .

As described above, in the case of the TWR positioning technique, depending on which AP list the tag device is to transmit / receive a message (Poll, Response, Final) for positioning, the performance of the positioning accuracy and the positioning time Is significantly influenced by

However, in the existing AP list providing method, when the tag device broadcasts a search signal to know an AP to which a message for positioning is to be transmitted, the AP list providing function of the nearby APs receiving the search signal And a list of APs stored in the specific APs is provided to the tag device.

When the tag apparatus 10 broadcasts a search signal at a position as shown in FIG. 1 by referring to the tag apparatus 10 and provides a conventional AP list providing method, , AP1,2,3,4,5,6,8.

Here, when it is assumed that the specific AP having the function of providing the AP list is the AP5, only the specific AP among the neighboring APs 1, 2, 3, 4, 5, 6, 8 receiving the search signal of the tag apparatus 10, To the tag device 10, a list of APs that are stored in the AP device 10.

At this time, the AP list stored in the AP 5 is a fixed AP list composed of APs adjacent to the AP 5 (e.g., AP 1, 2, 3, 4, 5).

That is, if the search signal of the tag apparatus 10 is received in the AP 5, the existing AP list providing system can not transmit the fixed AP list stored in the AP 5 to the tag apparatus 10, (10).

As a result, the existing AP list providing method has a problem that the performance of the positioning accuracy and the positioning time may deteriorate due to message transmission / reception with an inappropriate AP when positioning the tag device.

Accordingly, in the present invention, a method for improving positioning accuracy and positioning time performance by adaptively selecting an optimum communication apparatus (AP) for positioning the tag apparatus is proposed.

More specifically, in the present invention, it is desirable to realize the above-described proposed method of the present invention through a communication device (AP).

Hereinafter, a communication apparatus according to a first preferred embodiment of the present invention will be described in detail with reference to FIG. Here, the communication apparatus 100A according to the first preferred embodiment of the present invention may correspond to some or all of the APs shown in FIG.

2, the communication apparatus 100A according to the first preferred embodiment of the present invention transmits signal reception information according to reception of the search signal to the server 200 when receiving a search signal from the specific tag apparatus, A list receiving unit (110) for receiving, from the server (200), a communication device list generated based on signal receiving information reported from a plurality of communication devices that have received the search signal of the specific tag device And a list providing unit (130) for providing the communication device list to the specific tag device and allowing the specific tag device to perform positioning using the communication device list.

Hereinafter, the specific tag apparatus will be described with reference to the tag apparatus 10 shown in Fig.

When receiving the search signal from the specific tag apparatus, that is, the tag apparatus 10, the report unit 110 reports the signal reception information according to the search signal reception to the server 200.

More specifically, the tag apparatus 10 broadcasts a search signal to know a communication apparatus (AP) to transmit and receive a tag signal, that is, a message for positioning. At this time, the search signal may be a Poll message in which the AP address is not specified.

1, a search signal from the tag device 10 will be received in each of APs 1, 2, 3, 4, 5, 6, and 8 located in the vicinity of the tag device 100 .

The reporting unit 110 in each AP 1, 2, 3, 4, 5, 6, 8, in particular AP 1, 2, 3, 4, 5, 6, 8, in which a search signal from the tag apparatus 10 is received, And report the signal reception information according to the reception of the search signal to the server 200.

At this time, the signal reception information may include a tag ID of the tag apparatus 10, an AP ID reporting the signal reception information, and a signal reception intensity obtained by measuring a search signal of the tag apparatus 10.

The signal reception information reported by the AP 5 to the server 200 includes the tag ID of the tag apparatus 10, the AP ID of the AP 5, the signal obtained by measuring the search signal of the tag apparatus 10 at the AP 5, The received strength is included.

Thus, the server 200 receives and reports the signal reception information from the plurality of communication apparatuses AP1, 2, 3, 4, 5, 6, and 8 that have received the search signal of the tag apparatus 10. [

The server 200 may be the same server as the above-described positioning server (not shown) that performs tag device positioning, or may be a separate server.

The list reception unit 120 receives the signal reception information reported from the plurality of communication apparatuses AP1, 2, 3, 4, 5, 6, 8 receiving the search signal of the tag apparatus 10 from the server 200 And receives the generated communication device list.

That is, the list receiving unit 120 receives the communication device list or AP list generated by the server 200. [

Hereinafter, a process of generating an AP list in the server 200 will be described. In this process, the case of receiving signal reception information related to the tag apparatus 10 from a plurality of communication apparatuses AP1, 2, 3, 4, 5, 6, and 8 as described above will be described.

The server 200 determines whether or not it has been measured in each of AP1, 2, 3, 4, 5, 6, 8 based on the signal reception information reported from a plurality of communication apparatuses AP1,2,3,4,5,6,8 Check the signal reception strength of the search signal.

For example, in each signal reception information reported from AP1, 2, 3, 4, 5, 6, and 8, the search signals of the tag apparatus 10 in AP1,2,3,4,5,6,8 The measured signal reception strength is included.

Thus, based on the signal reception information reported from the APs 1, 2, 3, 4, 5, 6, and 8, the server 200 transmits the search signals The signal reception strength can be confirmed.

Then, the server 200 measures the signal reception intensity of the search signal measured by each of a plurality of communication apparatuses, that is, AP1,2,3,4,5,6,8 and AP1,2,3,4,5,6,8 2, 3, 4, 5, 6, 8 based on at least one of the respective positions.

More specifically, in the server 200, it is preferable that a range of the number of APs (e.g., a minimum of 3 to a maximum of 5) for AP selection is set in advance. Of course, it is possible to change and set the minimum number and maximum number of AP number ranges.

It is preferable that the server 200 stores the location of each AP.

Accordingly, when the server 200 reports the signal reception information related to the tag apparatus 10 from the AP 1, 2, 3, 4, 5, 6, and 8 as described above, the number of APs reporting the signal reception information is Since the maximum number of APs exceeds 5, the signal receiving strength of the search signals measured at AP 1, 2, 3, 4, 5, 6, and 8 and AP 1, 2, 3, A plurality of communication devices (AP) are selected based on at least one of the plurality of locations.

For example, based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 6, and 8, the server 200 sequentially selects five APs (Eg AP2, 4, 5, 6, 8) can be selected.

Alternatively, the server 200 selects one AP (for example, AP5) having the largest signal reception intensity based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, , Four APs close to the position of the previously selected AP (e.g., AP5) are sequentially set based on the respective positions of the APs 1, 2, 3, 4, 5, 6, , 5, 6, 8) can be selected.

Alternatively, the server 200 selects one AP (for example, AP5) having the largest signal reception intensity based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 2, 3, 4, 5, 6, and 8 based on the location of each AP (e.g., AP 1, 2, 3, (E.g., AP 2, 4, 5, 6, 8) having the lowest DOP among the AP combinations of five AP's that variably include the positions of the APs having the best DOP (Dilution of Precision) It is possible.

Here, the DOP means an error coefficient according to the position of the AP used for positioning in the triangulation method, and this is a concept that has been used sufficiently in the principle of the triangular positioning, so a detailed description will be omitted.

When the AP 200 (e.g., AP2,4,5,6,8) is selected as described above, the server 200 generates an AP list composed of the selected APs (e.g., AP2,4,5,6,8).

If the number of APs reporting the signal reception information associated with the tag apparatus 10 does not exceed the maximum number of APs in the AP number range, the server 200 selects all the APs reporting the signal reception information, Can be generated.

Then, the server 200 provides the generated AP list to one of the APs included in the AP list.

At this time, the server 200 can provide the AP list with the AP (for example, AP5) having the largest signal reception strength among the selected APs (e.g., AP2,4,5,6,8) The AP list can be provided by an AP (e.g., AP5).

The list receiving unit 120 in the communication apparatus 100A of the present invention, for example, the AP 5, can receive the AP list (e.g., AP2,4,5,6,8) generated by the server 200. [

The list providing unit 130 provides the AP list (for example, AP2,4,5,6,8) to the tag apparatus 10 so that the tag apparatus 10 transmits the AP list (for example, AP2,4,5, 6, 8) to perform positioning.

That is, the tag apparatus 10 transmits and receives a tag signal, that is, a message for positioning, with each of the APs 2, 4, 5, 6, and 8 belonging to the AP list provided from the communication apparatus 100A of the present invention, In the positioning server (not shown), the position of the tag apparatus 10 can be measured (grasped) through the triangulation technique based on the message round trip time delay provided from each AP 2, 4, 5, 6,

On the other hand, since the specific tag device, i.e., the tag device 10, is a movable object, there is a need to update the AP list provided as described above.

To this end, the tag device 10 can retransmit the above-described search signal, that is, a Poll message in which the AP address is not specified, in order to update the AP list when the predetermined period has been reached.

In this case, the AP list associated with the tag apparatus 10 will be newly generated (updated) through the above-described process by the search signal transmitted again by the tag apparatus 10 at regular intervals.

In addition, when the tag device 10 has moved beyond a predetermined range from the initially positioned position, based on the positioning result using the AP list provided as described above, the tag device 10 transmits the above- Can be transmitted.

In this case, if the tag apparatus 10 does not move over a predetermined range from the initially positioned position by using the AP list provided as described above, the AP list will continue to be used. If the tag apparatus 10 is moved from a position The AP list related to the tag apparatus 10 will be newly generated (updated) by the search signal to be retransmitted.

Further, the tag apparatus 10 is configured such that the signal reception intensity obtained by measuring the search signal of the communication apparatus included in the AP list provided as described above, that is, AP2, 4, 5, 6, If there are APs that fall below the AP list, it is possible to re-transmit the aforementioned search signals to update the AP list.

This means that the presence of APs whose signal reception strengths measured from the communication devices included in the AP list, i.e., the search signals of the tag devices 10 among AP2, 4, 5, 6, and 8, fall below a predetermined threshold, ) Is moved in one direction in the position where the AP list is provided.

In this case, if the tag apparatus 10 does not move greatly at the position where the AP list is provided as described above, the AP list will continue to be used. If the tag apparatus 10 moves greatly at the position where the AP list is provided, If there is an AP whose signal reception intensity measured the search signal of the tag device 10 among the communication devices included in the list, that is, AP2, AP4, AP6, AP8, falls below a predetermined threshold value, An AP list associated with the device 10 will be newly created (updated).

On the other hand, if the tag apparatus 10 has a function of measuring the signal reception intensity of a signal received from the AP, the tag apparatus 10 transmits the communication apparatus included in the AP list provided as described above, If there is an AP whose AP signal reception intensity falls below a preset threshold value based on the AP signal reception intensity measured for each of the APs 6, 8, and so on, the above-described search signal may be retransmitted to update the AP list.

As described above, according to the first embodiment of the present invention, instead of an existing fixed AP list, an optimum (adaptive) selected by considering an element (signal reception strength, AP position) It is possible to solve the problem that the performance of the positioning accuracy and the positioning time may deteriorate due to the message transmission / reception with the AP which is not appropriate at the positioning of the tag device.

Hereinafter, a communication apparatus according to a second preferred embodiment of the present invention will be described in detail with reference to FIG.

Here, the communication apparatus 100B according to the second preferred embodiment of the present invention corresponds to an AP having the AP list providing function among the APs shown in FIG.

3, the communication apparatus 100B according to the second preferred embodiment of the present invention receives signal search information from the candidate communication apparatus that has received the search signal from the specific tag apparatus, (140) for checking the signal reception intensity of the search signal measured by each of the candidate communication apparatuses based on the signal reception information, and for receiving the signal of the search signal measured by each of the candidate communication apparatuses A list generating unit (150) for selecting at least a candidate communication apparatus among the candidate communication apparatuses based on at least one of a strength, a position of each of the candidate communication apparatuses, and a position of each of the candidate communication apparatuses, And a list providing unit 160 for providing the generated communication device list.

Hereinafter, the specific tag apparatus will be described with reference to the tag apparatus 10 shown in Fig.

The information verification unit 140 confirms the signal reception information according to the search signal reception from the candidate communication apparatus, that is, the candidate AP that has received the search signal from the specific tag apparatus, that is, the tag apparatus 10. [

More specifically, the tag apparatus 10 broadcasts a search signal to know a communication apparatus (AP) to transmit and receive a tag signal, that is, a message for positioning.

1, a search signal from the tag device 10 will be received in each of APs 1, 2, 3, 4, 5, 6, and 8 located in the vicinity of the tag device 100 .

Each AP 1, 2, 3, 4, 5, 6, and 8 receiving the search signal from the tag device 10 reports the signal reception information according to the search signal reception to its representative AP.

Here, it is assumed that the representative AP is an AP having the AP list providing function, that AP5 shown in FIG. 1 is a representative AP of AP1, 2, 3, and 4, and AP10 is a representative AP of AP6, . In this case, candidate APs are AP1, 2, 3, and 4 in AP5 position, and candidate APs are AP6 and AP8 in AP10 position.

That is, each of the APs 1, 2, 3 and 4 receiving the search signal from the tag device 10 reports the signal reception information related to the tag device 10 to its representative AP 5, ) To its representative AP10. ≪ RTI ID = 0.0 >

Hereinafter, for convenience of explanation, it is assumed that the communication apparatus 100B of the present invention is the representative AP 5.

On the other hand, when the search signal of the tag apparatus 10 is received in the communication apparatus 100B or AP5 of the present invention, the communication apparatus 100B or AP5 of the present invention is included in the candidate AP in the AP5 position do.

The information confirming unit 140 receives the signal receiving information from the candidate AP, that is, the AP 1, 2, 3, 4, 5 receiving the search signal from the tag apparatus 10, And can confirm it.

The list generator 150 checks the signal reception strengths of the search signals measured in the candidate APs AP 1, 2, 3, 4, and 5 based on the signal reception information.

For example, the signal reception information obtained from the AP 1, 2, 3, 4, 5 includes the signal reception intensity obtained by measuring the search signal of the tag apparatus 10 in each of the AP 1, 2, 3, .

Accordingly, the list generator 150 can check the signal reception strength of the search signals measured by the APs 1, 2, 3, 4 and 5 on the basis of the signal reception information confirmed by the AP 1, 2, 3, .

Then, the list generating unit 150 generates AP1 (AP1), AP1 (AP1), AP2 (AP1), AP2 , 2, 3, 4, 5 are selected.

More specifically, it is preferable that a range of the number of APs (e.g., a minimum of 3 to a maximum of 5) for selecting an AP is previously set in the AP 5 (the communication apparatus 100B of the present invention) as the representative AP. Of course, it is possible to change and set the minimum number and maximum number of AP number ranges.

It is preferable that the representative APs AP5 (the communication apparatus 100B of the present invention) stores not only the location of the AP5 itself but also the locations of the APs 1, 2, 3, and 4 that recognize the AP5 itself as a representative AP Do.

When the number of APs confirming the signal reception information is larger than the number of APs that have confirmed the signal reception information in the case where the signal reception information related to the tag apparatus 10 is confirmed from the candidate APs, i.e., AP1,2,3,4,5, The number of AP1, 2, 3, 4, and 5 can be selected.

If the number of candidate APs that have confirmed the signal reception information associated with the tag apparatus 10 exceeds a maximum of five AP counts, the list generation unit 150 generates a signal reception intensity of the search signal measured at each of the candidate APs, And selects some candidate APs based on at least one of positions of candidate APs.

For example, the list generating unit 150 can sequentially select five candidate APs from the candidate APs having the largest signal reception strength, based on the signal reception strengths of the search signals measured in each of the candidate APs.

Alternatively, the list generator 150 may select one of the candidate APs having the largest signal reception strength based on the signal reception strength of the search signal measured in each of the candidate APs, and then, based on the position of each of the candidate APs, Four candidate APs close to the location can be sequentially set and five candidate APs can be selected.

Alternatively, the list generator 150 may select one of the candidate APs having the largest signal reception strength based on the signal reception strength of the search signal measured in each of the candidate APs, and then, based on the position of each of the candidate APs, The AP combination having the lowest DOP (Dilution of Precision) among the AP combinations of the five APs including the positions of the APs and the positions of the remaining candidate APs may be selected.

Then, when the AP (e.g., AP1,2,3,4,5) is selected as described above, the list generating unit 150 generates the list of APs including the selected APs (e.g., AP1,2,3,4,5) You can create a list.

On the other hand, before generating the AP list as described above, the list generating unit 150 generates, in the case where there is another communication apparatus, that is, another representative AP, which has generated the AP list in association with the tag apparatus 10, It is desirable to obtain a list of APs.

For example, as shown in FIG. 1, in the case of another representative AP 10 that has received the signal reception information from the candidate APs, that is, the APs 6 and 8 receiving the search signal from the tag device 10, An AP list can be generated.

In this case, based on information sharing among the representative APs, the list generating unit 150 can know that there is another representative AP 10 that generates an AP list in association with the tag apparatus 10. In this case, AP list (e.g., AP6,8).

At this time, the AP (e.g., AP5) that obtains the AP list from the other APs (e.g., AP10) out of the representative APs 5 and the representative APs 10 transmits a signal The AP has a larger reception intensity or a larger number of candidate APs whose signal reception information related to the tag device 10 is confirmed.

When acquiring the AP lists (e.g., AP6 and AP8) generated by the other representative APs 10, the list generating unit 150 generates the candidate APs AP1, 2, 3, 4, At least some candidate APs are selected from among the candidate APs, for example AP6,8, to which they belong.

More specifically, since the number of APs 6, 8 belonging to the selected AP 1, 2, 3, 4, 5 and the acquired AP list exceeds the maximum number of 5 APs in the AP number range as described above, 2, 3, 4, 5, 6, 8, and a position of each of AP1, 2, 3, 4, 5, 6, 8, (AP).

For example, based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 6, and 8, the list generation unit 150 sequentially calculates AP APs (e.g., AP2, 4, 5, 6, 8) can be selected.

Alternatively, the list generating unit 150 may generate APs (e.g., AP5) having the largest signal reception strength based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, Four APs close to the position of the previously selected AP (e.g. AP5) are sequentially set based on the respective positions of the APs 1, 2, 3, 4, 5, 6, and 8, , 4,5,6,8) can be selected.

Alternatively, the list generating unit 150 may generate APs (e.g., AP5) having the largest signal reception strength based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 2, 3, 4, 5, 6, and 8 based on the positions of the APs (e.g., AP5) 6, and 8) of the APs having the lowest dilution of precision (AP 2, 4, 5, 6, and 8, for example) among the AP combinations of the five APs.

When the AP (e.g., AP2, 4, 5, 6, 8) is selected as described above, the list generating unit 150 generates an AP You can create a list.

The list providing unit 160 provides the communication device list or the AP list generated by the list generating unit 150 to the tag device 10 so that the tag device 10 transmits the AP list 6, 8) to perform positioning.

Of course, in the second embodiment of the present invention, the tag device 10 will retransmit a search signal, that is, a Poll message in which the AP address is not specified, when an updating state of the AP list as described above occurs .

As described above, according to the second embodiment of the present invention, instead of an existing fixed AP list, an optimum (adaptive) selection is made in consideration of an element (signal reception strength, AP position) It is possible to solve the problem that the performance of the positioning accuracy and the positioning time may deteriorate due to the message transmission / reception with the AP which is not appropriate at the positioning of the tag device.

INDUSTRIAL APPLICABILITY As described above, according to the tag apparatus of the present invention, an optimum communication apparatus (AP) for positioning the tag apparatus can be adaptively selected to obtain an effect of increasing the positioning accuracy and the performance of the positioning time have.

Hereinafter, a first preferred embodiment of the present invention will be described in detail with reference to FIG. For convenience of description, description will be made with reference to Fig. 1 described above.

The tag apparatus 10 broadcasts a search signal (S1) in order to know a communication apparatus (AP) to transmit and receive a tag signal, that is, a message for positioning.

1, a search signal from the tag device 10 will be received in each of APs 1, 2, 3, 4, 5, 6, and 8 located in the vicinity of the tag device 100 .

Each AP 1, 2, 3, 4, 5, 6, and 8 receiving the search signal from the tag device 10 can report the signal reception information according to the search signal reception to the server 200 (S 10, S 11, S12, S13).

Thus, the server 200 receives and reports the signal reception information from the plurality of communication apparatuses AP1, 2, 3, 4, 5, 6, and 8 that have received the search signal of the tag apparatus 10. [

The server 200 generates a communication device list or AP list based on the signal reception information reported from a plurality of communication devices, i.e., AP1,2,3,4,5,6,8.

More specifically, the server 200 measures, based on the signal reception information reported from the AP 1, 2, 3, 4, 5, 6, Check the signal reception strength of the search signal.

For example, in each signal reception information reported from AP1, 2, 3, 4, 5, 6, and 8, the search signals of the tag apparatus 10 in AP1,2,3,4,5,6,8 The measured signal reception strength is included.

Thus, based on the signal reception information reported from the APs 1, 2, 3, 4, 5, 6, and 8, the server 200 transmits the search signals The signal reception strength can be confirmed.

Then, the server 200 determines at least one of the signal reception intensity of the search signal measured at each of the APs 1, 2, 3, 4, 5, 2, 3, 4, 5, 6, 8, based on one of the APs 1, 2, 3, 4, 5, 6, 8.

More specifically, in the server 200, it is preferable that a range of the number of APs (e.g., a minimum of 3 to a maximum of 5) for AP selection is set in advance.

Accordingly, when the server 200 reports the signal reception information related to the tag apparatus 10 from the AP 1, 2, 3, 4, 5, 6, and 8 as described above, the number of APs reporting the signal reception information is Since the maximum number of APs exceeds 5, the signal receiving strength of the search signals measured at AP 1, 2, 3, 4, 5, 6, and 8 and AP 1, 2, 3, A plurality of communication devices (AP) are selected based on at least one of the plurality of locations.

For example, based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 6, and 8, the server 200 sequentially selects five APs (Eg AP2, 4, 5, 6, 8) can be selected.

Alternatively, the server 200 selects one AP (for example, AP5) having the largest signal reception intensity based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, , Four APs close to the position of the previously selected AP (e.g., AP5) are sequentially set based on the respective positions of the APs 1, 2, 3, 4, 5, 6, , 5, 6, 8) can be selected.

Alternatively, the server 200 selects one AP (for example, AP5) having the largest signal reception intensity based on the signal reception strengths of the search signals measured at AP1, 2, 3, 4, 5, 2, 3, 4, 5, 6, and 8 based on the location of each AP (e.g., AP 1, 2, 3, 8) among the AP combinations of the five APs including the variable positions of the APs (e.g., AP 2, 4, 5, 6, 8) having the lowest dilution of precision (DOP).

When the AP 200 (e.g., AP2,4,5,6,8) is selected as described above, the server 200 generates an AP list composed of the selected APs (e.g., AP2,4,5,6,8).

If the number of APs reporting the signal reception information associated with the tag apparatus 10 does not exceed the maximum number of APs in the AP number range, the server 200 selects all the APs reporting the signal reception information, Can be generated.

Then, the server 200 provides the generated AP list to one of the APs included in the AP list (S30).

At this time, the server 200 can provide the AP list with the AP (for example, AP5) having the largest signal reception strength among the selected APs (e.g., AP2,4,5,6,8) The AP list can be provided by an AP (e.g., AP5).

The communication device 100A of the present invention, for example, AP5 receives AP lists (e.g., AP2, 4, 5, 6, 8) generated by the server 200 and transmits the list of APs , 8) to the tag device 10 (S40).

Thus, the tag apparatus 10 selects an optimum AP list (for example, AP 2, 4, 5, and 5) adaptively selected in consideration of an element (signal reception strength, AP position) closely related to the precise position of the tag apparatus 10. 6, 8) to perform positioning (S50).

Then, when the updating state of the AP list as described above occurs (S60), the tag apparatus 10 will retransmit the search signal, that is, the Poll message not specifying the AP address (S70).

Hereinafter, a method of operating the communication apparatus according to the second preferred embodiment of the present invention will be described in detail with reference to FIG. In the following description, for convenience of description, communication devices 100B and AP5 and tag device 10 will be described with reference to FIG.

The operation method of the communication device 100B according to the present invention confirms the signal reception information according to the reception of the search signal from the candidate AP that has received the search signal from the tag device 10 (S100).

More specifically, the tag apparatus 10 broadcasts a search signal to know a communication apparatus (AP) to transmit and receive a tag signal, that is, a message for positioning.

1, a search signal from the tag device 10 will be received in each of APs 1, 2, 3, 4, 5, 6, and 8 located in the vicinity of the tag device 100 .

Each AP 1, 2, 3, 4, 5, 6, and 8 receiving the search signal from the tag device 10 reports the signal reception information according to the search signal reception to its representative AP.

That is, each of the APs 1, 2, 3 and 4 receiving the search signal from the tag device 10 reports the signal reception information related to the tag device 10 to its representative AP 5, ) To its representative AP10. ≪ RTI ID = 0.0 >

On the other hand, when the search signal of the tag apparatus 10 is received in the communication apparatus 100B or AP5 of the present invention, the communication apparatus 100B or AP5 of the present invention is included in the candidate AP in the AP5 position do.

The operation method of the communication device 100B according to the present invention is a method for operating the communication device 100B according to the present invention from the candidate APs AP1, 2, 3, 4, 5 receiving the search signal from the tag device 10, And can receive and confirm the signal reception information according to the reception.

The operation method of the communication device 100B according to the present invention checks the signal reception strength of the search signal measured in each of the candidate APs AP1,2,3,4,5 based on the signal reception information (S110 ).

For example, the signal reception information obtained from the AP 1, 2, 3, 4, 5 includes the signal reception intensity obtained by measuring the search signal of the tag apparatus 10 in each of the AP 1, 2, 3, .

Therefore, the operation method of the communication device 100B according to the present invention is characterized in that the signal of the search signal measured at each of the APs 1, 2, 3, 4, The reception strength can be confirmed.

The operation method of the communication device 100B according to the present invention is the same as the operation method of the communication device 100B according to the present invention except that another communication device that generates the AP list in association with the tag device 10, (S120).

For example, as shown in FIG. 1, in the case of another representative AP 10 that has received the signal reception information from the candidate APs, that is, the APs 6 and 8 receiving the search signal from the tag device 10, An AP list can be generated.

In this case, the operation method of the communication apparatus 100B according to the present invention can recognize that there is another representative AP 10 that generates an AP list in association with the tag apparatus 10 based on information sharing between the representative APs (S120 Yes). In this case, the AP list (e.g., APs 6 and 8) generated by the other representative APs 10 can be obtained (S130).

At this time, the AP (e.g., AP5) that obtains the AP list from the other APs (e.g., AP10) out of the representative APs 5 and the representative APs 10 transmits a signal The AP has a larger reception intensity or a larger number of candidate APs whose signal reception information related to the tag device 10 is confirmed.

In the operation method of the communication apparatus 100B according to the present invention, when the AP list (for example, AP6,8) generated in the other representative APs 10 is obtained, the candidate APs, for example AP1,2,3,4,5 And a candidate AP, for example, AP6,8 belonging to the acquired AP list, is selected (S140).

More specifically, the operation method of the communication apparatus 100B according to the present invention is a method for operating the communication apparatus 100B according to the present invention, in which the APs 1, 2, 3, 4, 5 confirmed as described above and the APs 6, 5, 6, and 8, it is necessary that at least one of the signal receiving strengths of the search signals measured at AP 1, 2, 3, 4, And selects a part of the communication apparatuses (AP) based on the information.

For example, the operation method of the communication device 100B according to the present invention is characterized in that, based on the signal reception strengths of the search signals measured in AP1, 2, 3, 4, 5, Five APs (for example, AP2, 4, 5, 6, and 8) can be selected sequentially from a larger AP.

Alternatively, the method of operation of the communication device 100B according to the present invention is a method of operating AP (1, 2, 3, 4, 5, 6, 8) 4, 5, 6, and 8, and sequentially sets four APs close to the position of the previously selected AP (e.g., AP5), and sets 5 APs (e.g., AP2, 4, 5, 6, 8) can be selected.

Alternatively, the method of operation of the communication device 100B according to the present invention is a method of operating AP (1, 2, 3, 4, 5, 6, 8) AP5), and then the position of the previously selected AP (for example, AP5) is fixedly determined based on the positions of AP1, 2, 3, 4, 5, (AP2, 4, 5, 6, 8) with the lowest dilution of precision (DOP) among the AP combinations of 5 APs that vary the positions of the APs You may.

The operation method of the communication apparatus 100B according to the present invention is a method of operating the selected AP (for example, AP2, AP4, AP6, AP8) when the AP (for example, AP2,4,5,6,8) May be generated (S150).

The operation method of the communication device 100B according to the present invention is to provide the AP list generated in step S150 to the tag device 10 in step S160 so that the tag device 10 transmits the AP list , 6, 8) to perform positioning.

Of course, in the second embodiment of the present invention, the tag device 10 will retransmit a search signal, that is, a Poll message in which the AP address is not specified, when an updating state of the AP list as described above occurs .

As described above, according to the operation method of the tag device according to the present invention, an optimum communication device (AP) for positioning the tag device is adaptively selected to improve the positioning accuracy and the performance of the positioning time .

The method of operation of the tag device according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media 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 machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the operation method of the communication device and the communication device according to the present invention, in the tag device positioning technique (TWR positioning technique), an optimum communication device (AP) for positioning the tag device is adaptively selected, In order to increase the performance of time, it is not only the use of the related technology but also the possibility of commercialization or operation of the applied device is surpassed as it exceeds the limit of the existing technology. It is a possible invention.

100A, B: communication device
110: reporting unit 120: list receiving unit
130: list-based study
140: information verification unit 150: list generation unit
160: Listeners studying

Claims (10)

A reporting unit reporting the signal reception information according to the search signal reception to the server when a search signal from the specific tag apparatus is received;
A list receiver for receiving from the server a communication device list generated based on signal reception information reported from a plurality of communication devices that have received a search signal of the specific tag device; And
And a list providing unit for providing the communication device list to the specific tag device and enabling the specific tag device to perform positioning using the communication device list. The method according to claim 1,
The communication device list includes:
Wherein at least one of the plurality of communication devices is selected based on at least one of the signal reception strength of the search signal measured at each of the plurality of communication devices identified based on the signal reception information and the position of each of the plurality of communication devices And a part of the communication device. The method according to claim 1,
Wherein the search signal from the specific tag apparatus comprises:
When a predetermined period of time has elapsed or a predetermined range has been shifted from a position initially positioned based on a positioning result using the communication device list or a communication device included in the communication device list, Is received from the specific tag apparatus when there is a communication apparatus in which the signal receiving intensity obtained by measuring the search signal of the specific tag apparatus falls below a predetermined threshold value. 3. The method of claim 2,
The at least some communication devices comprising:
Wherein among the plurality of communication devices, the communication device having the largest signal reception intensity of the search signal is sequentially selected. 3. The method of claim 2,
The at least some communication devices comprising:
Wherein a communication device having a highest signal receiving intensity of the search signal and a communication device having a highest signal receiving intensity of the search signal are selected from among the plurality of communication devices, . 3. The method of claim 2,
The at least some communication devices comprising:
Characterized in that the communication apparatus belongs to a communication apparatus combination having the lowest dilution of precision (DOP) among a plurality of communication apparatus combinations including a communication apparatus having a highest signal receiving intensity of the search signal among the plurality of communication apparatuses Device. An information checking step of checking, from the candidate communication apparatus which has received the search signal from the specific tag apparatus, the signal reception information according to the search signal reception;
An intensity checking step of checking a signal reception intensity of the search signal measured by each of the candidate communication devices based on the signal reception information;
Selecting at least a candidate communication apparatus among the candidate communication apparatuses based on at least one of a signal receiving intensity of the search signal measured at each of the candidate communication apparatuses and a position of each of the candidate communication apparatuses; And
And a list providing step of generating and providing a communication device list including the selected candidate communication device. 8. The method of claim 7,
Further comprising the step of acquiring a communication device list generated in the another communication device when there is another communication device that has generated the communication device list in association with the specific tag device;
Wherein the selecting step comprises:
And selects at least a part of the candidate communication devices among the candidate communication devices and the candidate communication devices belonging to the obtained communication device list when acquiring the communication device list generated by the other communication device How it works. 9. The method of claim 8,
The communication device comprising:
The number of candidate communication apparatuses in which the signal receiving intensity measured for the search signal of the specific tag apparatus is larger or the signal receiving information related to the specific tag apparatus is confirmed is larger than that of the other communication apparatuses To the communication device. 8. The method of claim 7,
In the candidate communication apparatus,
Wherein the communication device includes the communication device when the communication device also receives the search signal of the specific tag device.

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