KR101579871B1 - Bluetooth Low Energy Network having the setting function of scanning period and method for thereof - Google Patents

Abstract

The present invention relates to a bluetooth low energy network and, particularly, to a bluetooth low energy network having a detection period changing function and a detection period changing method which change an advertising period of an advertiser, a first bluetooth device, and a scan mode interval of a scanner, a second bluetooth device, adaptively based on consumption time when detection between the advertiser and the scanner is successful, thereby enhancing detection speed for the bluetooth device and predetermined reference time. The present invention provides the bluetooth low energy network having the detection period changing function and the detection period changing method which, if a detection process by a scan process of the scanner is successfully completed, based on the current advertising consumption time and the predetermined reference advertising time, in the case that the current advertising consumption time is greater than the reference advertising time, sets the advertising period to be longer than the reference advertising period and in the case that the current advertising consumption time is less than the reference advertising time, sets the advertising period to be shorter than the reference advertising period; or if a scan process of an advertising channel provided from the advertiser is successfully completed at the scanner, based on the current scan consumption time and the predetermined reference scan time, in the case that the current scan consumption time is greater than the reference scan time, sets an scan mode interval to be shorter than the reference scan mode interval, and in the case that the current scan consumption time is smaller than the reference scan time, sets an scan mode interval to be longer than the reference scan mode interval.

Description

TECHNICAL FIELD [0001] The present invention relates to a Bluetooth low energy network having a search cycle changing function and a method for changing the search cycle,

The present invention relates to a Bluetooth low-energy network, and more particularly to a Bluetooth low-energy network in which an adversary, which is a first Bluetooth device, and a scanner that is a second Bluetooth device, And more particularly to a Bluetooth low energy network having a search cycle changing function and a search cycle changing method for enabling a search speed for a Bluetooth device to be improved by allowing an advertisement period and a scanning mode interval of a scanner to be changed.

Recently, the Bluetooth 4.0 specification has been attracting attention again in the field of wireless sensor network combining the BLE technology and the object internet technology as the low power mode becomes possible compared to the conventional Bluetooth.

The Bluetooth low energy (BLE) network is basically composed of a scanner and an advertiser that perform BLE communication. The advertiser is a Bluetooth device capable of transmitting data packets, and the scanner is a Bluetooth device capable of receiving data packets from the advertiser.

Also, in a BLE network, 40 RF channels are allocated to two physical channels, i.e., an advertising channel and a data channel. The advertising channel uses three RF channels to discover devices, initiate connections, and broadcast data. And the data physical channel uses up to 37 RF channels for communication between connected devices.

The device marking process performed for pairing the advertiser and the scanner in the BLE network transmits the three advertisement radio channels to the scanner at a predetermined periodic interval in the advertiser, The scanning operation is completed when the radio channel transmitted from the advertiser is scanned during the operation period of the scanner by scanning the advertisement radio channel provided from the advertiser at intervals.

However, since the advertiser and the scanner are fixedly set at different transmission / reception periods and are not synchronized with each other, a search operation for using the Bluetooth device may take more time than a certain period of time.

The delay of the search time between the Bluetooth devices results in a deterioration of the service quality.

[Prior Art]

1. Korean Patent Laid-Open No. 2009-0104992 (Title of the Invention: Bluetooth Communication Device Search Method and Terminal and System for the Same)

2. Korean Patent No. 0881223 entitled " Bluetooth device and method capable of dynamically adjusting query scan period, and recording medium recording a program for implementing the same "

Accordingly, the present invention can adaptively adjust the advertisement period of the advertiser based on the time required for successful search between the first Bluetooth device, the scanner and the second Bluetooth device, and the predetermined reference time The present invention provides a Bluetooth low energy network having a search cycle changing function and a search cycle changing method for changing a scan mode interval of a scanner so as to improve a search speed for a Bluetooth device.

According to an aspect of the present invention, there is provided an information processing apparatus including an advertisement device, which is a Bluetooth device that performs channel transmission with information, and a scanner that is a Bluetooth device that scans an information channel provided from the advertisement device Wherein the advertisement server performs adverification for wirelessly transmitting an advertisement channel for performing a device search with the scanner and performs search processing by scanning processing of the scanner, Is successfully completed, it is necessary to change the advertising period for the subsequent advertisement based on the current advertisement advertisement time and the predetermined advertisement advertisement time, If the time is longer than the advertising time, set the advertisement period longer than the reference advertisement period, If the time required for re-adverting is smaller than the reference advertisementing time, the advertisement changing period is set to be shorter than the reference advertisement period, and the adverting operation is performed based on the changed advertisement setting period, Wherein the scanner is configured to perform scanning processing of an advertisement channel provided from the advertiser. The Bluetooth low energy network having a search cycle changing function is provided.

The advertisement period changing function may be configured to change an advertisement period by changing a sleep interval in an advertisement period constituted by an advertising interval and a sleep interval. A Bluetooth low energy network is provided.

, 여기서 π_REF 는 기준 애드버타이징 시간, τ_AI 는 애드버타이징 주기, τ_WA 는 애드버타이징 채널.Also, the Bluetooth low energy network having the search cycle changing function is provided, wherein the reference advertisement time is set by the following equation.

, Where π _REF is the reference advertising time, τ _AI is the advertising period, τ _WA is The advertising channel.

, 여기서 τ_AI,n 은 변경설정되는 이후 애드버타이징 주기이고, τ_AI,n-1 은 현재 적용된 애드버타이징 주기.Also, the advertisement period may be changed by setting the advertisement period so as to correspond to the ratio (ρ) between the reference advertisement time and the current advertisement time, and the value calculated by the following formula The Bluetooth low energy network having the search cycle changing function is provided.

, Where τ _{AI, n} is the post-changeover advertising period and τ _{AI, n-1} is the currently applied advertising cycle.

In addition, when the scanning process of the advertisement channel provided from the advertiser is successfully completed, the scanner determines a scan mode interval of the scan period for the next scan based on the current scan time and the predetermined reference scan time If the current scan time is longer than the reference scan time, the scan mode interval is set to be shorter than the reference scan mode interval. If the current scan time is shorter than the reference scan time, And the mobile station is configured to perform an advertisement channel scan process based on the changed setting. The Bluetooth low energy network having the search cycle changing function is provided.

, 여기서, π_REF 는 기준 스캔시간, τ_SI 는 스캔 주기, τ_SW 는 스캔모드 구간.Also, the reference scan time is set by the following equation: < EMI ID = 1.0 >

Wherein, π _REF is the reference scanning time, τ is _SI The scan period, τ _SW , Scan mode section.

, 여기서 τ_SW,n 은 변경설정되는 이후 스캔주기이고, τ_SW,n-1 은 현재 적용된 스캔 주기.Also, the scanner is configured to change the scan period so as to correspond to the ratio (rho) of the reference scan period to the current scan time, and to change the scan period to a value calculated by the following equation: A Bluetooth low energy network having a cycle change function is provided.

, Where τ _{SW, n} is the subsequent scan period to be changed and τ _{SW, n-1} is the currently applied scan period.

According to another aspect of the present invention, there is provided an information processing apparatus including an advertiser, which is a Bluetooth device that performs channel transmission with information, and a Bluetooth device that scans information channels provided from the advertiser Wherein the scanner performs advertisement transmission for wirelessly transmitting an advertisement channel for performing a device search with the scanner, and the scanner transmits the advertisement channel to the scanner, When the scan processing of the advertisement channel provided from the advertiser is successfully completed, the scan mode interval of the scan period for the subsequent scan is changed based on the current scan time and the preset reference scan time If the current scan time is longer than the reference scan time, the scan mode section is divided into the reference scan mode section When the current scan time is shorter than the reference scan time, the scan mode section is configured to be longer than the reference scan mode section, and the advertisement channel scan processing is performed based on the setting. A Bluetooth low energy network having a search cycle change function is provided.

, 여기서, π_REF 는 기준 스캔시간, τ_SI 는 스캔 주기, τ_SW 는 스캔모드 구간.Also, the reference scan time is set by the following equation: < EMI ID = 1.0 >

Wherein, π _REF is the reference scanning time, τ is _SI The scan period, τ _SW , Scan mode section.

, 여기서 τ_SW,n 은 변경설정되는 이후 스캔주기이고, τ_SW,n-1 은 현재 적용된 스캔 주기.Also, the scanner is configured to change the scan period so as to correspond to the ratio (rho) of the reference scan period to the current scan time, and to change the scan period to a value calculated by the following equation: A Bluetooth low energy network having a cycle change function is provided.

, Where τ _{SW, n} is the subsequent scan period to be changed and τ _{SW, n-1} is the currently applied scan period.

According to another aspect of the present invention, there is provided a mobile communication terminal including an ad-hoc device, which is a Bluetooth device for performing channel transmission, and a scanner, which is a Bluetooth device for scanning a channel provided from the ad- A method for changing a search period of a Bluetooth low-energy network that performs Bluetooth low-energy communication between an advertiser and a scanner, the method comprising: transmitting the advertisement channel to the scanner in an advertising mode; A second step of scanning an advertising channel transmitted from the advertiser in a scan mode, the scanner performing a second step of scanning the advertisement channel transmitted from the advertiser in the scan mode, A third step of transmitting a search response signal to the advertiser when the tiring channel is successfully scanned, The controller compares the current time required for advertisement and the preset reference advertisement time based on the search response signal provided from the scanner and if the current time required for advertisement is longer than the reference advertisement time, If the advertisement period is set longer than the reference advertisement period and the current advertisement time is shorter than the reference advertisement time, the advertisement period may be shorter than the reference advertisement period And a fourth step of changing the search period in the Bluetooth low-energy network, and performing a subsequent advertisement process accordingly.

In the fourth step, the size of the sleep mode interval is changed and the search period is changed in the advertisement period constituted by the advertisement mode and the sleep mode, thereby changing the search cycle in the Bluetooth low-energy network Method is provided.

In addition, the reference advertisement time set in the advertiser in the fourth step is the maximum required time when the advertisement is successively searched twice by three advertisement channels. A method for changing the search cycle in a Bluetooth low energy network is provided.

, 여기서 τ_AI,n 은 변경설정되는 이후 애드버타이징 주기이고, τ_AI,n-1 은 현재 적용된 애드버타이징 주기.In the fourth step, the advertisement period is changed and set so as to correspond to the ratio (ρ) between the reference advertisement period and the current advertisement time period, and is calculated through the following equation And changing the advertisement period according to the changed value of the advertisement period. The present invention also provides a method for changing the search period in the Bluetooth low-energy network.

, Where τ _{AI, n} is the post-changeover advertising period and τ _{AI, n-1} is the currently applied advertising cycle.

In the third step, when the scan processing of the advertisement channel is successfully completed, the scanner compares the current scan time with a preset reference scan time. When the current scan time is longer than the reference scan time, If the current scan time is shorter than the reference scan time, the scan mode section is changed so as to expand the scan mode section, and then the subsequent scanning process of the advertisement channel is performed A method of changing a search cycle in a Bluetooth low-energy network is provided.

According to another aspect of the present invention, there is provided a method for changing a scan period in a Bluetooth low-energy network, wherein the scan mode interval is changed in a scan period having a predetermined size, the scan mode and the sleep mode.

In addition, the reference scan time set in the scanner in the fifth step is set as a maximum time required for scanning three advertisement channels one scan and succeeding in the two advertisement channels. A method for changing the search cycle in a Bluetooth low energy network is provided.

, 여기서 τ_SW,n 은 변경설정되는 이후 스캔주기이고, τ_SW,n-1 은 현재 적용된 스캔 주기.In the fifth step, the scanner changes the scan period to correspond to the ratio of the reference scan period to the current scan period, and changes the scan period to a value calculated by the following equation A method for changing a search cycle in a Bluetooth low-energy network is provided.

, Where τ _{SW, n} is the subsequent scan period to be changed and τ _{SW, n-1} is the currently applied scan period.

According to another aspect of the present invention, there is provided a mobile communication terminal including an ad-hoc device, which is a Bluetooth device for performing channel transmission, and a scanner, which is a Bluetooth device for scanning a channel provided from the ad- A method for changing a search period of a Bluetooth low-energy network that performs Bluetooth low-energy communication between an advertiser and a scanner, the method comprising: transmitting an advertisement channel to the scanner in an advertising mode; The method of claim 11, wherein the step of scanning comprises scanning the advertisement channel transmitted from the advertiser in a scan mode, A thirteenth step of transmitting a search response signal to the advertiser when the scanning channel is successfully scanned, If the current scan time is longer than the reference scan time, the scan time interval of the scan period is shorter than the reference scan time, If the current scan time is shorter than the reference scan time, changing the scan mode interval so as to expand the scan mode interval, and then performing an after-scanning channel scanning process thereafter A method for changing a search cycle in a Bluetooth low-energy network is provided.

In the 14th step, the scan mode interval is changed in a scan period having a predetermined size, which is configured of a scan mode and a sleep mode, and a method for changing the scan period in the Bluetooth low-energy network is provided.

The reference scan time set in the scanner in the 14th step is set as a maximum time required for scanning three advertisement channels one scan and succeeding in the two advertisement channels. A method for changing the search cycle in a Bluetooth low energy network is provided.

, 여기서 τ_SW,n 은 변경설정되는 이후 스캔주기이고, τ_SW,n-1 은 현재 적용된 스캔 주기.In step 14, the scanner changes the scan period to correspond to the ratio (ρ) of the reference scan period to the current scan period, and changes the scan period to a value calculated by the following equation A method for changing a search cycle in a Bluetooth low-energy network is provided.

, Where τ _{SW, n} is the subsequent scan period to be changed and τ _{SW, n-1} is the currently applied scan period.

According to the present invention, by adaptively changing the advertisement period of the advertiser, which is the first Bluetooth device, and the scan mode interval of the scanner, which is the second Bluetooth device, based on the search success time, It is possible to provide a Bluetooth network capable of improving the speed more.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a main part of a Bluetooth low energy (BLE) network having a search cycle changing function according to the present invention; FIG.
2 is a functional block diagram showing a configuration of a main part for performing search processing in the scanner 200 and the advertiser 100 shown in Fig.
3 is a flowchart illustrating a method of setting a reference advertisement time in the reference advertisement time setting module 120 shown in FIG. 2 and a method of setting a reference scan time in the reference scan time setting module 220 drawing.
FIG. 4 is a diagram for explaining a method of changing the advertisement period in the advertisement period changing module 130 shown in FIG. 2 and a method of setting a scan period in the scan period changing module 230.
FIG. 5 is a diagram for explaining a search cycle changing method of a Bluetooth low energy (BLE) network having the search cycle changing function shown in FIG. 1; FIG.
6 illustrates an example of a search cycle change of a Bluetooth low energy (BLE) network in FIG.

Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, the Bluetooth low-energy network according to the present invention refers to a wireless system that performs BLE communication between Bluetooth devices. Preferably, the Bluetooth low-energy network includes a plurality of Bluetooth devices that perform channel transmission and a channel provided from an advertiser And a scanner, which is at least one or more Bluetooth devices for scanning the wireless sensor network. In addition, the BLE network to which the present invention is applied can be applied to a wireless sensor network implemented, for example, in a vinyl house or the like, in which a higher effect can be obtained in an environment where the density of the advertiser is high.

In the present invention, the search cycle includes an advertisement period of the advertiser and a scan period of the scanner.

FIG. 1 is a diagram schematically showing essential components of a Bluetooth low energy (hereinafter referred to as BLE) network having a search cycle changing function according to the present invention.

1, a BLE network having a search cycle changing function according to the present invention includes a plurality of Bluetooth devices 100, 100 ₁ to 100 _N , which are Bluetooth devices that perform channel transmission with information, And at least one or more Bluetooth devices (200, 200 ₁ to 200 _M ) that scan a channel provided from the advertiser (100).

In this case, the BLE network may be any wireless system in which at least one advertiser 100 performs BLE wireless communication with one scanner 200.

The scanner 200 performs advertisement processing for wirelessly transmitting three predetermined advertisement channels for device search to the scanner 200. The scanner 200 performs scan processing of the scanner 200, If the search process is successfully completed, the adverting period for the subsequent advertisement is changed based on the current time required for the advertisement and the predetermined reference advertisement time. At this time, if the current time required for advertisement is longer than the reference advertisement time, the advertisement period is set to be longer than the reference advertisement period, If the elapsed time is shorter than the reference advertisement time, the advertisement period is changed so that the advertisement period is shorter than the reference advertisement period.

The scanner 200 performs a series of scanning processes for scanning three advertisement channels wirelessly transmitted from the advertiser 100. The scanner 200 scans a plurality of advertisement channels transmitted from the advertiser 100, When the scanning process of the scanning channel is successfully completed, the scan mode period of the predetermined scan period is changed based on the current scan time and the reference scan time. In this case, if the current scan time is longer than the reference scan time, the scanner 200 sets the scan mode interval to be longer than the reference scan mode interval. If the current scan time is shorter than the reference scan time, The scan period is changed so as to be shorter than the scan mode interval.

FIG. 2 is a functional block diagram showing the arrangement of the main part for performing search processing in the scanner 200 and the advertiser 100 shown in FIG.

2, the advertiser 100 includes a first BLE communication module 110, a reference advertisement time setting module 120, an advertisement period changing module 130 ).

The first BLE communication module 110 performs BLE communication with the scanner 200. In particular, the first BLE communication module 110 wirelessly transmits three preset advertisement channels for device search, And receives response information from the scanner (200). At this time, the first BLE communication module 110 wirelessly transmits the advertisement channel in the advertisement mode period of the predetermined advertisement period.

As shown in FIG. 3 (A), the reference advertisement time setting module 120 calculates the maximum time required for successful advertisement search by three advertisement channels, Set the advertising time. In FIG. 3A, 37, 38 and 39 channels are three advertisement channels (τ _WA ) set in the BLE network, τ _AI is the advertisement period, and π _REF is the reference advertisement time . At this time, the advertisement period τ _{AI is} composed of an advertisement mode period and a sleep period (sp) for transmitting three advertisement channels τ _WA . Further, the above-mentioned reference advertisement time period? _REF can be set by Equation (1).

When the search success signal of the scanner 200 provided from the first BLE communication module 110 is received, the advertisement period changing module 130 calculates the current advertisement ranging time, The adverting period for the subsequent advertisement processing is changed and set on the basis of the buiting time and the calculated current time required for advertisement. At this time, the advertisement period is changed and set on the basis of the coefficient p that is adaptively calculated in the current search state as shown in FIG. The coefficient? Is set in the range of 0?? 2 and the range of the advertising period? _AI is the same as that of the current advertisement is set to a range that is larger than 1/2 of the reference period and smaller than or equal to two times the reference period when the reference period is "1 " (see Equation (2)). In addition, the ad server palletizing period (τ _AI) is a coefficient (ρ) is "1" relative to when the coefficient (ρ) is the smaller than "1" Ad server tajing period (τ _AI) getting hold the set And the advertising rate τ _AI is gradually set shorter as the coefficient "ρ" becomes larger than "1".

That is, the coefficient? Is set to the ratio? Of the reference advertising time (? _REF ) and the current search time (? _D ) as shown in Equation (2).

Also, the advertisement period changing module 130 changes and sets the subsequent advertisement period as shown in Equation (3) based on the coefficient p.

Here, τ _{AI, n} is the post-changeover advertisement period, and τ _{AI, n-1} is the currently applied advertisement period.

2, the scanner 200 includes a second BLE communication module 210, a reference scan period setting module 220, and a scan period change module 230.

The second BLE communication module 210 is a module for performing BLE communication with the advertiser 100. Specifically, the second BLE communication module 210 scans three advertisement channels wirelessly transmitted from the advertiser 100 If the scan processing is successfully performed, the search response information indicating that the advertisement channel is received is wirelessly transmitted. At this time, the second BLE communication module 210 performs scan processing on the advertisement channel in the scan mode period of the predetermined scan period.

As shown in FIG. 3B, the reference scan period setting module 220 scans three advertisement channels one time and calculates a maximum scan time when the search is successful in two advertisement channels Set the reference scan time. 3 (B), τ _SI is a scan period, τ _SW is a scan mode period set in one scan period, and π _REF is a reference scan time. At this time, the scan period τ _SI is composed of a scan mode interval τ _SW and a sleep (sp) mode interval. Further, the reference scan time? _REF may be set by Equation (4).

When the scanning process of the advertisement channel provided from the advertiser 100 is successfully completed, the scan period changing module 230 calculates the current scan time, And to change and set a scan mode period of a predetermined scan period based on the scan time. At this time, the scan mode period is changed and set on the basis of the coefficient?, Which is adaptively calculated in the current search state, as shown in FIG. The coefficient p is set in the range of " 0 ≤ The scan mode interval? _SW is set such that the coefficient? Is set to be equal to the reference scan time and the current scan time, i.e., when the coefficient? Is "1" (see Equation 2) The scan mode section tau _SW is set to be gradually shortened as the value becomes smaller than "1 ", and the scan mode section tau _SW is set longer as the coefficient rho is larger than" 1 ". Here, the coefficient? Is applied to Equation (2), and is set as a ratio of a reference scan time (? _REF ) to a current scan time (? _D ).

 Also, the scan period changing module 230 sets a next scan period as shown in Equation (5) based on the coefficient p.

Here, τ _{SW, n} is the scan period after the change is set, and τ _{SW, n-1} is the currently applied scan period.

Next, the operation of the Bluetooth low-energy network having the above-described configuration with the search cycle changing function will be described with reference to FIG.

First, the advertiser 100, which is a Bluetooth device that carries out channel transmission, calculates the maximum time required for successful search by advertising the three advertisement channels twice each time, Time is set (ST11). At this time, the reference advertisement time period is a reference advertisement period.

In addition, the scanner 200, which is a Bluetooth device that scans a channel provided from the advisor 100, scans three advertisement channels one time and determines whether the search is successful in two advertisement channels The maximum required time is calculated and set as the reference scan time (ST21).

In the above-described state, when the information to be transmitted to the scanner 200 occurs, the advertiser 100 wirelessly transmits the advertisement channel in the advertisement interval based on the currently set advertisement period (ST12). In this case, when the Bluetooth device setup request is made by the user, the advertiser 100 determines that the information to be transmitted is generated when the user selects the Bluetooth setting button or the Bluetooth item of the advertiser 100, And performs the advertisement processing for transmission.

When the information to be received from the advertiser 100 occurs, the scanner 200 scans the advertisement channel in the scan mode period based on the currently set scan period (ST22). In this case, when the Bluetooth device setting request is made by the user, the scanner 200 determines that information to be received is generated when the user selects the Bluetooth setting button or the Bluetooth item of the scanner 200, Processing is performed.

Here, the advertiser 100 repeatedly performs an advertisement process for wirelessly transmitting the advertisement channel until the search is successful in the advertisement interval based on the preset advertisement period .

In addition, the scanner 200 repeatedly performs a scan process of continuously scanning an advertisement channel until a search is successfully performed in a scan mode interval based on a preset scan period.

At this time, if the scanner 200 successfully scans the advertisement channel in the scan mode, the scanner 200 wirelessly transmits a search response signal to the advertiser 100 (ST23).

In step ST23, the advertiser 100 compares the current time required for advertisement with the preset reference advertisement time based on the search response signal provided from the scanner 200, If the time required is longer than the standard advertising time, the advertisement setting period is set longer, and if the current advertising time is shorter than the reference advertisement time, the advertisement period is shortened And then performs the subsequent advertisement processing (ST24). Here, the advertiser 100 changes or sets the advertisement period by setting the sleep interval to be short or long in the advertisement period composed of the advertising interval and the sleep interval. 6 (Y) shows a case in which the basic advertisement period, that is, the case where "coefficient (rho) = 1", the case where "coefficient (rho)> 1" The timing cycle is shown. That is, in the case of the above-mentioned " coefficient (rho) > 1 ", the advertisement period is set shorter than the basic advertisement period, Set it longer than the bucking cycle.

When the scan processing of the advertisement channel is successfully completed in step ST23, the scanner 200 compares the current scan time with a preset reference scan time, and if the current scan time is larger than the reference scan time The scan mode section is reduced in a predetermined scan period. If the current scan time is shorter than the reference scan time, the scan mode section is changed to expand the scan mode section, and the scan processing is performed thereafter. Here, the scanner 200 changes or sets the scan period by setting the scan mode period to be shorter or longer in a predetermined scan period including the scan mode period and the sleep period. 6 (X) shows a scan period in which the basic scan period, that is, the coefficient (rho) = 1, the coefficient rho 1, and the coefficient rho &lt; have. That is, in the case of the above-mentioned " coefficient (rho) &gt; 1 &quot;, the scan mode section is set longer than the scan mode section of the basic scan period, Set it shorter than the mode interval. The dotted line of the scan mode section in the case of "coefficient (rho)> 1" and the "coefficient (rho) <1" in FIG. 6 (X) represents the scan mode section in the basic scan period.

 Therefore, according to the embodiment, the advertisement period of the advertiser and the scan mode interval of the scanner are changed adaptively based on the time required for successful search between the advertiser and the scanner and the predetermined reference time , It is possible to further improve the search performance between the Bluetooth devices.

In the above embodiment, the advertisement period and the scan period are simultaneously changed. However, it is also possible to change only the advertisement period or only the scan period.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the appended claims should include all such modifications and changes as fall within the scope of the present invention.

100: an advertiser, 200: a scanner,
110, 210: BLE communication module, 120: reference advertising time setting module,
130: an advertisement period changing module, 220: a reference scan time setting module,
230: Scan cycle change module.

Claims (22)

1. A Bluetooth low energy network comprising an advertiser, which is a Bluetooth device that performs channel transmission with information, and a scanner that is a Bluetooth device that scans an information channel provided by the advertiser,
The advertisement server performs advertisement for wirelessly transmitting an advertisement channel for performing device search with the scanner, and when the search process by the scan process of the scanner is successfully completed, If the current advertising time is longer than the reference advertisement time, change the advertising period for future advertisement based on the time required for the advertisement and the preset reference advertisement time If the advertisement period is set longer than the reference advertisement period and the current advertisement time is shorter than the reference advertisement time, the advertisement period may be shorter than the reference advertisement period And configured to perform an advertisement operation based on the change setting,
Wherein the scanner is configured to perform a scanning process of an advertisement channel provided from the advertiser. The method according to claim 1,
Wherein the advertiser is configured to change an advertisement period by changing a sleep interval in an advertisement period constituted by an advertising interval and a sleep interval. Low energy network. The method according to claim 1,
Wherein the reference advertisement time period is set by the following equation.

,
Where π _REF is the reference advertising time, τ _AI is the advertising period, τ _WA is The advertising channel. The method according to claim 1,
Wherein the advertiser changes the advertising period so as to correspond to a ratio (ρ) between a reference advertisement time and a current advertisement time, wherein the advertising server Wherein the controller is configured to change the setting period of the Bluetooth cycle.

,
Where τ _{AI, n} is the post-changeover advertising period and τ _{AI, n-1} is the currently applied advertising rate. The method according to claim 1,
When the scan processing of the advertisement channel provided from the advertiser is successfully completed, the scanner changes the scan mode period of the scan period for the next scan based on the current scan time and the preset reference scan time If the current scan time is longer than the reference scan time, the scan mode interval is set to be shorter than the reference scan mode interval. If the current scan time is shorter than the reference scan time, And to perform an advertisement channel scanning process on the basis of the changed setting period of the Bluetooth low energy network. The method of claim 5, wherein
Wherein the reference scan time is set by the following equation.

,
Here, π _REF is the reference scan time, τ _SI is The scan period, τ _SW , Scan mode section. 6. The method of claim 5,
Wherein the scanner is configured to change the scan period so as to correspond to the ratio (?) Of the reference scan period to the current scan time, and to change the scan period to a value calculated by the following equation: Bluetooth low energy network.

,
Here, τ _{SW, n} is a subsequent scan period to be changed and set, and τ _{SW, n-1} is a currently applied scan period. 1. A Bluetooth low energy network comprising an advertiser, which is a Bluetooth device that performs channel transmission with information, and a scanner that is a Bluetooth device that scans an information channel provided by the advertiser,
Wherein the advertiser performs adverting wirelessly transmitting an advertisement channel for performing a device search with the scanner,
In the scanner, when the scanning process of the advertisement channel provided from the advertiser is successfully completed, the scanner transmits the scan mode interval of the scan period for the next scan based on the current scan time and the predetermined reference scan time If the current scan time is longer than the reference scan time, the scan mode interval is set to be shorter than the reference scan mode interval. If the current scan time is shorter than the reference scan time, Mode interval, and performs an advertisement channel scanning process based on the change setting. [5] The Bluetooth low energy network according to claim 1, The method of claim 8, wherein
Wherein the reference scan time is set by the following equation.

,
Here, π _REF is the reference scan time, τ _SI is The scan period, τ _SW , Scan mode section. 9. The method of claim 8,
Wherein the scanner is configured to change the scan period so as to correspond to the ratio (?) Of the reference scan period to the current scan time, and to change the scan period to a value calculated by the following equation: Bluetooth low energy network.

,
Here, τ _{SW, n} is a subsequent scan period to be changed and set, and τ _{SW, n-1} is a currently applied scan period. A Bluetooth device that carries out channel transmission, and a scanner, which is a Bluetooth device that scans the channel provided from the advertiser, to perform low-energy Bluetooth communication between the advertiser and the scanner. A method for changing a search cycle of a network,
The method comprising: a first step of performing an advertisement operation for transmitting an advertising channel to the scanner in an advertising mode;
A second step of scanning an advertisement channel transmitted from the advertiser in a scan mode,
A third step of transmitting a search response signal to the advertiser when the scanner successfully scans the advertisement channel in the second step;
The adverbiner compares the current time required for advertisement and the preset reference advertisement time based on the search response signal provided from the scanner to determine whether the current time required for advertisement is equal to the reference advertisement time The advertisement period is set to be longer than the reference advertisement period. If the current advertisement time is shorter than the reference advertisement time, the advertisement period is set as the reference advertisement And a fourth step of changing the search period so as to be shorter than the period and performing a subsequent advertisement process thereafter. 12. The method of claim 11,
Wherein the fourth period changes the sleep period interval in the advertisement period configured by the advertisement mode and the sleep mode to change the search period and change the search period in the Bluetooth low energy network. 12. The method of claim 11,
Wherein the reference advertisement setting time set in the advertiser in the fourth step is a maximum time required when advertisement search is successfully performed by adbiting each of the three advertisement channels twice. How to change the search cycle in the network. 12. The method of claim 11,
In the fourth step, the advertiser changes the advertisement period so as to correspond to the ratio (ρ) between the reference advertisement period and the current advertisement period, and the value calculated through the following equation Wherein the advertisement period changing unit sets the advertisement period in the Bluetooth low energy network.

,
Where τ _{AI, n} is the post-changeover advertising period and τ _{AI, n-1} is the currently applied advertising rate. The method of claim 11, wherein
The scanner compares the current scan time with a preset reference scan time when the scan processing of the advertisement channel is successfully completed in the third step and if the current scan time is longer than the reference scan time, And a fifth step of changing the scanning mode interval so as to expand the scanning mode interval if the current scanning time is shorter than the reference scanning time, Wherein the search period is changed in the Bluetooth low energy network. 16. The method of claim 15,
And the fifth step is configured to change the scan mode interval in a scan period having a predetermined size, the scan mode and the sleep mode being set to be changed. 16. The method of claim 15,
Wherein the scan reference time set in the scanner in the fifth step is set as a maximum time required when scanning is performed in two advertisement channels by scanning three advertisement channels one time. How to change the search cycle in the network. 16. The method of claim 15,
In the fifth step, the scanner changes the scan period so as to correspond to the ratio (ρ) of the reference scan period to the current scan time, and changes the scan period to a value calculated by the following equation A method for changing a search cycle in a Bluetooth low energy network.

,
Here, τ _{SW, n} is a subsequent scan period to be changed and set, and τ _{SW, n-1} is a currently applied scan period. A Bluetooth device that carries out channel transmission, and a scanner, which is a Bluetooth device that scans the channel provided from the advertiser, to perform low-energy Bluetooth communication between the advertiser and the scanner. A method for changing a search cycle of a network,
The elevator includes an eleventh step of performing an advertisement operation to transmit an advertising channel to the scanner in an advertising mode,
Wherein the scanner scans the advertisement channel transmitted from the advertiser in a scan mode,
Wherein the scanner transmits the search response signal to the advertiser when the advertisement channel is successfully scanned in step 12,
If the current scan time is longer than the reference scan time, the scanner compares the current scan time with a preset reference scan time when the scan processing of the advertisement channel is successfully completed in step 13, Setting a mode interval to be short and changing the scan mode interval to extend when the current scan time is shorter than the reference scan time and performing a subsequent scanning process for the advertisement channel, Wherein the search period is changed in the Bluetooth low energy network. 20. The method of claim 19,
The method of claim 14, wherein the scan mode interval is changed in a scan period having a predetermined size, the scan mode and the sleep mode. 20. The method of claim 19,
Wherein the reference scan time set in the scanner in the 14th step is set as a maximum time required when scanning is performed in two advertisement channels by scanning three advertisement channels one time. How to change the search cycle in the network. 20. The method of claim 19,
In step 14, the scanner changes the scan period so as to correspond to the ratio (ρ) of the reference scan period to the current scan time, and changes the scan period to a value calculated by the following equation A method for changing a search cycle in a Bluetooth low energy network.

,
Here, τ _{SW, n} is a subsequent scan period to be changed and set, and τ _{SW, n-1} is a currently applied scan period.

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