JP5359935B2

JP5359935B2 - Short-range wireless communication device, reception control method, and program

Info

Publication number: JP5359935B2
Application number: JP2010046507A
Authority: JP
Inventors: 岳浩相原; 一志雨谷; 直隆上原; 孝行小金; 純人篠原; 祐人布川; 哲也半田; 公靖水野
Original assignee: Casio Computer Co Ltd
Current assignee: Casio Computer Co Ltd
Priority date: 2010-03-03
Filing date: 2010-03-03
Publication date: 2013-12-04
Anticipated expiration: 2030-03-03
Also published as: JP2011182305A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a short range radio communication device, a reception control method, and a program for suitably performing communication. <P>SOLUTION: A reception power detection unit 27 compares the signal level of a received signal with an activation level stored in an activation power register 28, and when the signal level is equal to or higher than the activation level, puts a controller 21 and a demodulator 24 in an on-state. Then, the controller 21 executes processing corresponding to the received signal. Also, the controller 21 re-sets the activation level stored in the activation power register 28 based on the signal level of the received signal. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、近距離無線通信機、受信制御方法、及び、プログラムに関する。 The present invention relates to a short-range wireless communication device, a reception control method, and a program.

近年、ＮＦＣ（Near Field Communication）や、ＴｒａｎｓｆｅｒＪｅｔなどの近距離無線通信が普及してきている。これらの近距離無線通信は、その通信距離が数センチメートルである。これを利用し、通信機同士をタッチする、あるいはかざすという行為で通信を行うという、ユーザにわかりやすいインタフェースを特徴としている（例えば、特許文献１）。 In recent years, near field communication such as NFC (Near Field Communication) and TransferJet has become widespread. These short-range wireless communications have a communication distance of several centimeters. Using this, it is characterized by an easy-to-understand interface for the user to perform communication by touching or holding the communication devices (for example, Patent Document 1).

特開２００７−１３５０５４号公報JP 2007-133504 A

適切な通信距離を保つために、送信側の通信機の信号送信レベルと、受信側の通信機の受信感度とを調整する必要がある。しかし、その調整が難しく、通信距離にばらつきが生じやすいという問題点がある。 In order to maintain an appropriate communication distance, it is necessary to adjust the signal transmission level of the communication device on the transmission side and the reception sensitivity of the communication device on the reception side. However, there is a problem that the adjustment is difficult and the communication distance is likely to vary.

本発明は、上記実状に鑑みてなされたものであり、好適に通信を行う近距離無線通信機、受信制御方法、及び、プログラムを提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a short-range wireless communication apparatus, a reception control method, and a program that perform suitable communication.

本発明の第１の観点にかかる近距離無線通信機は、
信号を受信する受信手段と、
前記受信手段が受信した信号の強度を検出する信号強度検出手段と、
前記信号強度検出手段が検出した前記信号の強度が所定の閾値以上であるか否かを判別する信号強度判別手段と、
前記信号強度判別手段が、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理手段と、
前記信号強度検出手段が検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定手段と、
を備え、
前記再設定手段は、前記信号強度検出手段が検出した前記信号の強度から所定の値を引いた値が、現在設定されている前記所定の閾値より小さい値であれば、その値を前記所定の閾値として再設定する
ことを特徴とする。 A short-range wireless communication device according to a first aspect of the present invention is:
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold; and
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
With
If the value obtained by subtracting a predetermined value from the intensity of the signal detected by the signal intensity detecting unit is smaller than the currently set predetermined threshold, the resetting unit sets the value to the predetermined value. Reset as threshold
It is characterized by that .

本発明の第２の観点にかかる近距離無線通信機は、
信号を受信する受信手段と、
前記受信手段が受信した信号の強度を検出する信号強度検出手段と、
前記信号強度検出手段が検出した前記信号の強度が所定の閾値以上であるか否かを判別する信号強度判別手段と、
前記信号強度判別手段が、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理手段と、
前記信号強度検出手段が検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定手段と、
前記受信手段が受信した信号から識別情報を取得する識別情報取得手段と、
前記所定の閾値を前記識別情報と対応付けて複数記憶する閾値記憶手段と、
を備え、
前記信号強度判別手段は、前記信号の強度が、前記識別情報取得手段が取得した前記識別情報に対応する前記所定の閾値以上であるか否かを判別し、
前記再設定手段は、前記識別情報取得手段が取得した前記識別情報に対応する前記所定の閾値を再設定する
ことを特徴とする。 A short-range wireless communication device according to a second aspect of the present invention is:
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold; and
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
Identification information acquisition means for acquiring identification information from the signal received by the reception means;
Threshold storage means for storing a plurality of the predetermined thresholds in association with the identification information;
Bei to give a,
The signal strength determining means determines whether or not the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired by the identification information acquiring means;
The resetting unit resets the predetermined threshold corresponding to the identification information acquired by the identification information acquiring unit.
It is characterized by that .

本発明の第３の観点にかかる近距離無線通信機の受信制御方法は、
信号を受信する受信ステップと、
前記受信ステップで受信した信号の強度を検出する検出ステップと、
前記検出ステップで検出した前記信号の強度が所定の閾値以上であるか否かを判別する判別ステップと、
前記判別ステップで、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理ステップと、
前記検出ステップで検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定ステップと、
を含み、
前記再設定ステップでは、前記検出ステップで検出した前記信号の強度から所定の値を引いた値が、現在設定されている前記所定の閾値より小さい値であれば、その値を前記所定の閾値として再設定する
ことを特徴とする。
本発明の第４の観点にかかる近距離無線通信機の受信制御方法は、
信号を受信する受信ステップと、
前記受信ステップで受信した信号の強度を検出する検出ステップと、
前記検出ステップで検出した前記信号の強度が所定の閾値以上であるか否かを判別する判別ステップと、
前記判別ステップで、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理ステップと、
前記検出ステップで検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定ステップと、
前記受信ステップで受信した信号から識別情報を取得する取得ステップと、
前記所定の閾値を前記識別情報と対応付けて複数記憶する記憶ステップと、
を含み、
前記判別ステップでは、前記信号の強度が、前記取得ステップで取得した前記識別情報に対応する前記所定の閾値以上であるか否かを判別し、
前記再設定ステップでは、前記取得ステップで取得した前記識別情報に対応する前記所定の閾値を再設定する
ことを特徴とする。 The short-range wireless communication device reception control method according to the third aspect of the present invention includes:
A receiving step for receiving a signal;
A detecting step for detecting the intensity of the signal received in the receiving step;
A determination step of determining whether or not the intensity of the signal detected in the detection step is equal to or greater than a predetermined threshold;
In the determination step, when it is determined that the intensity of the signal is equal to or higher than a predetermined threshold value, a processing step of executing processing based on the signal;
A resetting step for resetting the predetermined threshold based on the intensity of the signal detected in the detecting step;
Only including,
In the resetting step, if a value obtained by subtracting a predetermined value from the intensity of the signal detected in the detecting step is smaller than the currently set predetermined threshold value, the value is set as the predetermined threshold value. It is characterized by resetting .
A reception control method for a short-range wireless communication device according to a fourth aspect of the present invention includes:
A receiving step for receiving a signal;
A detecting step for detecting the intensity of the signal received in the receiving step;
A determination step of determining whether or not the intensity of the signal detected in the detection step is equal to or greater than a predetermined threshold;
In the determination step, when it is determined that the intensity of the signal is equal to or higher than a predetermined threshold value, a processing step of executing processing based on the signal;
A resetting step for resetting the predetermined threshold based on the intensity of the signal detected in the detecting step;
An obtaining step of obtaining identification information from the signal received in the receiving step;
A storage step of storing a plurality of the predetermined threshold values in association with the identification information;
Including
In the determination step, it is determined whether the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired in the acquisition step;
In the resetting step, the predetermined threshold value corresponding to the identification information acquired in the acquiring step is reset.
It is characterized by that.

本発明の第５の観点にかかるプログラムは、
コンピュータを、
信号を受信する受信手段、
前記受信手段が受信した信号の強度を検出する信号強度検出手段、
前記信号強度検出手段が検出した前記信号の強度が所定の閾値以上であるか否かを判別する信号強度判別手段、
前記信号強度判別手段が、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理手段、
前記信号強度検出手段が検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定手段、
として機能させるプログラムであって、
前記再設定手段は、前記信号強度検出手段が検出した前記信号の強度から所定の値を引いた値が、現在設定されている前記所定の閾値より小さい値であれば、その値を前記所定の閾値として再設定する
プログラムである。
本発明の第６の観点にかかるプログラムは、
コンピュータを、
信号を受信する受信手段、
前記受信手段が受信した信号の強度を検出する信号強度検出手段、
前記信号強度検出手段が検出した前記信号の強度が所定の閾値以上であるか否かを判別する信号強度判別手段、
前記信号強度判別手段が、前記信号の強度が所定の閾値以上であると判別した場合、当該信号に基づいた処理を実行する処理手段、
前記信号強度検出手段が検出した前記信号の強度に基づいて、前記所定の閾値を再設定する再設定手段、
前記受信手段が受信した信号から識別情報を取得する識別情報取得手段、
前記所定の閾値を前記識別情報と対応付けて複数記憶させる閾値記憶手段、
として機能させるプログラムであって、
前記信号強度判別手段は、前記信号の強度が、前記識別情報取得手段が取得した前記識別情報に対応する前記所定の閾値以上であるか否かを判別し、
前記再設定手段は、前記識別情報取得手段が取得した前記識別情報に対応する前記所定の閾値を再設定する
プログラムである。 The program according to the fifth aspect of the present invention is:
Computer
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold;
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
A program that functions as
If the value obtained by subtracting a predetermined value from the intensity of the signal detected by the signal intensity detecting unit is smaller than the currently set predetermined threshold, the resetting unit sets the value to the predetermined value. Reset as threshold
It is a program .
The program according to the sixth aspect of the present invention is:
Computer
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold;
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
Identification information acquisition means for acquiring identification information from the signal received by the reception means;
Threshold storage means for storing a plurality of the predetermined threshold values in association with the identification information;
A program that functions as
The signal strength determining means determines whether or not the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired by the identification information acquiring means;
The resetting unit resets the predetermined threshold corresponding to the identification information acquired by the identification information acquiring unit.
It is a program.

本発明によれば、好適に近距離無線通信を行うことができる。 According to the present invention, short-range wireless communication can be suitably performed.

本発明の実施形態に係る近接無線通信機を利用するシステムの概要を示す図である。It is a figure which shows the outline | summary of the system using the near field communication apparatus which concerns on embodiment of this invention. 近接無線通信機の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of a near field communication apparatus. 受信電力比較処理の動作を示すフローチャートである。It is a flowchart which shows operation | movement of a received power comparison process. 起動レベル設定処理の動作を示すフローチャートである。It is a flowchart which shows operation | movement of a starting level setting process. 起動レベルの再設定の具体例を示す図である。It is a figure which shows the specific example of reset of a starting level. 近接無線通信機の他の例の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the other example of a near field communication apparatus.

本発明にかかる実施形態を、図面を参照して以下に説明する。図１は、本発明の実施形態に係る近接無線通信機２０を利用するシステムの概要を示す図である。近接無線通信機２０は、ＮＦＣ（Near Field Communication）などの近接無線通信方式により、外部の通信手段１０と無線通信を行う。通信手段１０は、例えば、通信機能を備えるＩＣカードや、当該ＩＣカードを備える携帯電話などの端末装置、あるいは、リモコン装置などの電子機器である。 Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an overview of a system that uses a close proximity wireless transfer device 20 according to an embodiment of the present invention. The close proximity wireless communication device 20 performs wireless communication with the external communication means 10 by a close proximity wireless communication method such as NFC (Near Field Communication). The communication unit 10 is, for example, an electronic device such as an IC card having a communication function, a terminal device such as a mobile phone including the IC card, or a remote control device.

近接無線通信機２０は、通信手段１０からの信号を検出すると、その信号に応じた処理を行う。この実施形態の近接無線通信機２０と通信手段１０における通信距離は、数センチメートルなど比較的近い距離を想定している。例えば、ユーザは、通信手段１０を近接無線通信機２０に接触させたり、通信手段１０を近接無線通信機２０にかざすことで、近接無線通信機２０に所望の動作を実行させる。例えば、通信手段１０が電子マネー機能を持ったＩＣカードであり、そのＩＣカードが発する信号を近接無線通信機２０が検出すると、近接無線通信機２０は、出入金の処理を行う。 When the close proximity wireless communication device 20 detects a signal from the communication means 10, it performs processing according to the signal. The communication distance between the close proximity wireless communication device 20 and the communication means 10 of this embodiment is assumed to be a relatively close distance such as several centimeters. For example, the user causes the proximity wireless communication device 20 to perform a desired operation by bringing the communication means 10 into contact with the proximity wireless communication device 20 or holding the communication means 10 over the proximity wireless communication device 20. For example, when the communication unit 10 is an IC card having an electronic money function and the proximity wireless communication device 20 detects a signal emitted from the IC card, the proximity wireless communication device 20 performs a deposit / withdrawal process.

図２は、近接無線通信機２０の概略構成を示すブロック図である。図２に示すように、近接無線通信機２０は、コントローラ２１と、アンテナ２２と、増幅回路２３と、復調器２４と、変調器２５と、電力増幅回路２６と、受信電力検出器２７と、起動電力レジスタ２８と、から構成される。 FIG. 2 is a block diagram illustrating a schematic configuration of the close proximity wireless transfer device 20. As shown in FIG. 2, the proximity wireless communication device 20 includes a controller 21, an antenna 22, an amplifier circuit 23, a demodulator 24, a modulator 25, a power amplifier circuit 26, a received power detector 27, And an activation power register 28.

コントローラ２１は、ＣＰＵ（Central Processing Unit）やＲＯＭ（Read Only Memory）やＲＡＭ（Random Access Memory）などから構成され、近接無線通信機２０の動作を制御する。例えば、ＲＯＭに格納されたプログラムを実行することにより、通信手段１０からアンテナ２２などを介して受信した信号に基づいた処理を実行し、その実行結果に対応した信号をアンテナ２２などを介して無線通信手段１０に送出する。 The controller 21 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and controls the operation of the close proximity wireless transfer device 20. For example, by executing a program stored in the ROM, processing based on a signal received from the communication unit 10 via the antenna 22 or the like is executed, and a signal corresponding to the execution result is wirelessly transmitted via the antenna 22 or the like. It is sent to the communication means 10.

なお、通信手段１０と近接無線通信機２０との信号のやりとりは、１往復に限らず、必要な回数行われる。なお、通信手段１０からのみ信号を送信するものであって、近接無線通信機２０からの通信は行われないものであってもよい（例えば、カードキーが読取装置により検出されたときに鍵の解錠施錠を行う場合など）。 Note that the exchange of signals between the communication means 10 and the proximity wireless communication device 20 is not limited to one round trip, but is performed as many times as necessary. The signal may be transmitted only from the communication means 10 and may not be communicated from the close proximity wireless communication device 20 (for example, when the card key is detected by the reading device, the key For example, when unlocking and locking.

アンテナ２２は、通信手段１０からの信号を検出する。アンテナ２２は、通信手段１０から検出した信号を増幅回路２３に伝送する。また、アンテナ２２は、電力増幅回路２６から伝送された信号を送信する。 The antenna 22 detects a signal from the communication unit 10. The antenna 22 transmits the signal detected from the communication unit 10 to the amplifier circuit 23. The antenna 22 transmits the signal transmitted from the power amplifier circuit 26.

増幅回路２３は、アンテナ２２が検出した信号を増幅する。増幅回路２３は、例えばＬＮＡ（Low Noise Amplifier）などである。増幅回路２３は、増幅した信号を復調器２４及び受信電力検出器２７に伝送する。 The amplifier circuit 23 amplifies the signal detected by the antenna 22. The amplifier circuit 23 is, for example, an LNA (Low Noise Amplifier). The amplifier circuit 23 transmits the amplified signal to the demodulator 24 and the received power detector 27.

復調器２４は、アンテナ２２及び増幅回路２３を介して伝送された信号を、コントローラ２１で読取可能な信号に復調する。復調器２４は、復調した信号をコントローラ２１に伝送する。 The demodulator 24 demodulates the signal transmitted via the antenna 22 and the amplifier circuit 23 into a signal that can be read by the controller 21. The demodulator 24 transmits the demodulated signal to the controller 21.

コントローラ２１は、復調器２４から信号を受けると、伝送された信号に対応した処理を実行する。そして、コントローラ２１は、その処理結果に対応した信号を変調器２５に伝送する。 When the controller 21 receives a signal from the demodulator 24, the controller 21 executes processing corresponding to the transmitted signal. Then, the controller 21 transmits a signal corresponding to the processing result to the modulator 25.

コントローラ２１及び復調器２４は、図示せぬ電力源から供給される電力に基づいて動作し、その機能を実行するＯＮ状態と、実行しないＯＦＦ状態と、に切り替え可能になっている。近接無線通信機２０では、ＯＦＦ状態においてはコントローラ２１及び復調器２４に電力が供給されないため、常時電力が供給されるものと比べて消費電力を抑えることができる。 The controller 21 and the demodulator 24 operate based on electric power supplied from a power source (not shown), and can be switched between an ON state in which the function is executed and an OFF state in which the function is not executed. In the close proximity wireless communication device 20, power is not supplied to the controller 21 and the demodulator 24 in the OFF state, so that power consumption can be suppressed as compared with a device that always supplies power.

変調器２５は、コントローラ２１から伝送された信号を、アンテナ２２から送出可能な信号に変調する。変調器２５は、変調した信号を電力増幅回路２６に伝送する。 The modulator 25 modulates the signal transmitted from the controller 21 into a signal that can be transmitted from the antenna 22. The modulator 25 transmits the modulated signal to the power amplifier circuit 26.

電力増幅回路２６は、変調器２５から伝送された信号を増幅する。電力増幅回路２６は、例えばＰＡ（Power Amplifier）などである。電力増幅回路２６は、増幅した信号をアンテナ２２を介して送信する。 The power amplifier circuit 26 amplifies the signal transmitted from the modulator 25. The power amplifier circuit 26 is, for example, a PA (Power Amplifier). The power amplifier circuit 26 transmits the amplified signal via the antenna 22.

受信電力検出器２７は、増幅回路２３から伝送された信号の電力（信号レベル）を検出する。そして、受信電力検出器２７は、検出した信号レベルを、起動電力レジスタ２８に記憶される起動レベルと比較する。このとき、検出した信号レベルが起動レベル以上であれば、アンテナ２２が受信した信号に対応する処理を実行するため、受信電力検出器２７は、コントローラ２１及び復調器２４をＯＮ状態とするための起動信号を、コントローラ２１及び復調器２４に伝送する。 The reception power detector 27 detects the power (signal level) of the signal transmitted from the amplifier circuit 23. Then, the reception power detector 27 compares the detected signal level with the activation level stored in the activation power register 28. At this time, if the detected signal level is equal to or higher than the activation level, the reception power detector 27 performs processing corresponding to the signal received by the antenna 22, so that the received power detector 27 turns on the controller 21 and the demodulator 24. The activation signal is transmitted to the controller 21 and the demodulator 24.

起動電力レジスタ２８は、コントローラ２１及び復調器２４をＯＮ状態にするか否かを判別する際の基準となる起動レベルを記憶する記憶領域である。起動電力レジスタ２８には、初期状態（例えば近接無線通信機２０の起動時の状態）では、所定の初期起動レベルが記憶される。起動電力レジスタ２８に記憶される起動レベルは、コントローラ２１の制御のもと、再設定される。詳細な動作については後述する。 The activation power register 28 is a storage area for storing an activation level that serves as a reference when determining whether or not the controller 21 and the demodulator 24 are turned on. The activation power register 28 stores a predetermined initial activation level in an initial state (for example, a state when the close proximity wireless communication device 20 is activated). The activation level stored in the activation power register 28 is reset under the control of the controller 21. Detailed operation will be described later.

続いて、近接無線通信機２０の動作について説明する。近接無線通信機２０のアンテナ２２が無線通信手段１０から信号を検出すると、その信号が増幅回路２３に伝送される。そして、増幅回路２３は、アンテナ２２から伝送された信号を増幅し、増幅した信号を復調器２４及び受信電力検出器２７に伝送する。 Next, the operation of the close proximity wireless transfer device 20 will be described. When the antenna 22 of the close proximity wireless communication device 20 detects a signal from the wireless communication means 10, the signal is transmitted to the amplifier circuit 23. Then, the amplifier circuit 23 amplifies the signal transmitted from the antenna 22 and transmits the amplified signal to the demodulator 24 and the received power detector 27.

受信電力検出器２７は、増幅回路２３から信号を受けると図３に示す受信電力比較処理を実行する。 When receiving the signal from the amplifier circuit 23, the received power detector 27 executes a received power comparison process shown in FIG.

受信電力比較処理では、まず、受信電力検出器２７は、増幅回路２３から受けた信号の信号レベルを、起動電力レジスタ２８に記憶されている起動レベルと比較する（ステップＳ１０１）。 In the received power comparison process, first, the received power detector 27 compares the signal level of the signal received from the amplifier circuit 23 with the activation level stored in the activation power register 28 (step S101).

そして、受信電力検出器２７は、増幅回路２３から受けた信号の信号レベルが起動レベル以上であるか否かを判別する（ステップＳ１０２）。増幅回路２３から受けた信号の信号レベルが起動レベルより小さければ（ステップＳ１０２；Ｎｏ）、当該信号はノイズであると判別し、そのまま受信電力比較処理を終了する。この場合、アンテナ２２が検出した信号は復調されず、当該信号に基づく処理も実行されない。 Then, the received power detector 27 determines whether or not the signal level of the signal received from the amplifier circuit 23 is equal to or higher than the activation level (step S102). If the signal level of the signal received from the amplifier circuit 23 is lower than the activation level (step S102; No), it is determined that the signal is noise, and the received power comparison process is terminated as it is. In this case, the signal detected by the antenna 22 is not demodulated, and processing based on the signal is not executed.

増幅回路２３から受けた信号の信号レベルが起動レベル以上であれば（ステップＳ１０２；Ｙｅｓ）、アンテナ２２が受信した信号を処理するため、受信電力検出器２７は、コントローラ２１及び復調器２４をＯＮ状態とするための起動信号を、コントローラ２１及び復調器２４に伝送する（ステップＳ１０３）。そして、受信電力比較を終了する。 If the signal level of the signal received from the amplifier circuit 23 is equal to or higher than the activation level (step S102; Yes), the received power detector 27 turns on the controller 21 and the demodulator 24 in order to process the signal received by the antenna 22. An activation signal for setting the state is transmitted to the controller 21 and the demodulator 24 (step S103). Then, the received power comparison ends.

増幅回路２３から受けた信号の信号レベルが起動レベル以上であった場合には、復調器２４はＯＮ状態となるので、増幅回路２３から伝送された信号を復調し、復調した信号をコントローラ２１に伝送する。 When the signal level of the signal received from the amplifier circuit 23 is equal to or higher than the activation level, the demodulator 24 is in an ON state, so that the signal transmitted from the amplifier circuit 23 is demodulated and the demodulated signal is sent to the controller 21. To transmit.

そして、同様にＯＮ状態となったコントローラ２１は、復調器２４から信号を受けると、伝送された信号に対応した処理を実行する。その後、その処理結果に対応した信号を変調器２５に伝送する。 Similarly, when receiving a signal from the demodulator 24, the controller 21 that is turned on executes processing corresponding to the transmitted signal. Thereafter, a signal corresponding to the processing result is transmitted to the modulator 25.

変調器２５は、コントローラ２１から伝送された信号を、アンテナ２２から送出可能な信号に変調し、変調した信号を電力増幅回路２６に伝送する。そして、電力増幅回路２６は、変調器２５から伝送された信号を増幅し、増幅した信号をアンテナ２２を介して送出する。 The modulator 25 modulates the signal transmitted from the controller 21 into a signal that can be transmitted from the antenna 22, and transmits the modulated signal to the power amplifier circuit 26. The power amplification circuit 26 amplifies the signal transmitted from the modulator 25 and sends the amplified signal through the antenna 22.

また、コントローラ２１は、復調器２４から信号を受けると、起動レベルを再設定するための起動レベル設定処理を実行する。図４は、起動レベル設定処理の動作を示すフローチャートである。 Further, when receiving a signal from the demodulator 24, the controller 21 executes a start level setting process for resetting the start level. FIG. 4 is a flowchart showing the operation of the activation level setting process.

起動レベル設定処理では、先ず、コントローラ２１は、受信した信号の信号レベルを検出する（ステップＳ２０１）。 In the activation level setting process, first, the controller 21 detects the signal level of the received signal (step S201).

続いて、コントローラ２１は、起動電力レジスタ２８に記憶されている起動レベルが予め設定された初期値であるか否かを判別する（ステップＳ２０２）。 Subsequently, the controller 21 determines whether or not the activation level stored in the activation power register 28 is a preset initial value (step S202).

起動電力レジスタ２８に記憶されている起動レベルが初期値であれば（ステップＳ２０２；Ｙｅｓ）、コントローラ２１は、ステップＳ２０１で検出した信号レベルから所定値を引いた値を新たな起動レベルとして起動電力レジスタ２８に記憶する（ステップＳ２０３）。ステップＳ２０３の処理を実行した後は、起動レベル設定処理を終了する。 If the activation level stored in the activation power register 28 is an initial value (step S202; Yes), the controller 21 uses the value obtained by subtracting a predetermined value from the signal level detected in step S201 as a new activation level. Store in the register 28 (step S203). After executing the process of step S203, the activation level setting process is terminated.

なお、ステップＳ２０３における所定値とは、通信手段１０から送信される信号の信号レベルの誤差の範囲と推定される値などであればよい。このようにすることで、通信手段１０から送信される信号の信号レベルが誤差により小さくなったとしても、近接無線通信機２０でその信号を受信し、処理することができる。 It should be noted that the predetermined value in step S203 may be a value estimated as a signal level error range of a signal transmitted from the communication unit 10 or the like. By doing in this way, even if the signal level of the signal transmitted from the communication means 10 becomes small due to an error, the signal can be received and processed by the close proximity wireless communication device 20.

また、ステップＳ２０３においては、初期値より小さい値が起動レベルとして設定されないようにしてもよい。即ち、ステップＳ２０１で検出した信号レベルから所定値を引いた値が初期値より小さければ、起動レベルは初期値のまま変更しないようにしてもよい。具体的には、起動レベルの設定範囲を予め定めておく。そして、起動レベルの初期値は、その設定範囲のうち最も小さい値とすればよい。このようにすることで、初期状態では、起動レベルが最も小さくなっており、信号の受信感度が最も高くなっているが、その後に受信した信号の信号レベルに応じて、随時起動レベルを大きな値に変更し、受信感度を下げて好適な信号の受信を行うことができる。 In step S203, a value smaller than the initial value may not be set as the activation level. That is, if the value obtained by subtracting the predetermined value from the signal level detected in step S201 is smaller than the initial value, the activation level may be left unchanged at the initial value. Specifically, the setting range of the activation level is determined in advance. The initial value of the activation level may be the smallest value in the setting range. In this way, in the initial state, the startup level is the smallest and the signal reception sensitivity is the highest, but depending on the signal level of the signal received thereafter, the startup level is increased as needed. In this way, a suitable signal can be received with the reception sensitivity lowered.

また、起動電力レジスタ２８に記憶されている起動レベルが初期値でなければ（ステップＳ２０２；Ｎｏ）、コントローラ２１は、ステップＳ２０１で検出した信号レベルから所定値を引いた値が現在の起動レベルより小さいか否かを判別する（ステップＳ２０４）。 If the activation level stored in the activation power register 28 is not the initial value (step S202; No), the controller 21 has a value obtained by subtracting a predetermined value from the signal level detected in step S201 from the current activation level. It is determined whether or not it is small (step S204).

このとき、ステップＳ２０１で検出した信号レベルから所定値を引いた値が現在の起動レベルより小さければ（ステップＳ２０４；Ｙｅｓ）、ステップＳ２０１で検出した信号レベルから所定値を引いた値を新たな起動レベルとして起動電力レジスタ２８に記憶する（ステップＳ２０３）。ステップＳ２０１で検出した信号レベルから所定値を引いた値が現在の起動レベル以上であれば（ステップＳ２０４；Ｎｏ）、起動レベルの再設定は行わず、起動レベル設定処理を終了する。このように、することで、受信した信号の信号レベルのうち、最も信号レベルの小さな信号を基準に起動レベルを設定することができる。 At this time, if the value obtained by subtracting the predetermined value from the signal level detected in step S201 is smaller than the current activation level (step S204; Yes), a value obtained by subtracting the predetermined value from the signal level detected in step S201 is newly activated. The level is stored in the startup power register 28 (step S203). If the value obtained by subtracting the predetermined value from the signal level detected in step S201 is equal to or higher than the current activation level (No in step S204), the activation level setting process is not performed and the activation level setting process is terminated. In this way, the activation level can be set based on the signal having the lowest signal level among the signal levels of the received signal.

以上のように、信号に基づいた処理、及び、起動レベル設定処理が終了すると、復調器２４及びコントローラ２１は、ＯＦＦ状態となる。なお、信号に基づいた処理、及び、起動レベル設定処理の終了後、所定期間が経過した後に、復調器２４及びコントローラ２１がＯＦＦ状態となるようにしてもよい。あるいは、外部からの操作に応じてＯＦＦ状態となるようにしてもよい。 As described above, when the processing based on the signal and the activation level setting processing are completed, the demodulator 24 and the controller 21 are turned off. Note that the demodulator 24 and the controller 21 may be turned off after a predetermined period has elapsed after the processing based on the signal and the startup level setting processing. Or you may make it be in an OFF state according to the operation from the outside.

図５は、起動レベルの再設定の具体例を示す図である。起動レベルが初期のときに、図５（Ａ）に示すような信号を受信した場合、当該信号の信号から所定値を引いた値が、新たな起動レベルに設定される。それ以降に信号を受信したときには、図５（Ｂ）、（Ｄ）に示すように、当該信号の信号から所定値を引いた値が、現在の起動レベルより小さければ、その値が新たな起動レベルに設定される。一方、図５（Ｃ）に示すように、当該信号の信号から所定値を引いた値が、現在の起動レベル以上であれば、起動レベルは変更されない。 FIG. 5 is a diagram illustrating a specific example of resetting the activation level. When a signal as shown in FIG. 5A is received when the activation level is initial, a value obtained by subtracting a predetermined value from the signal of the signal is set as a new activation level. When a signal is received thereafter, as shown in FIGS. 5B and 5D, if a value obtained by subtracting a predetermined value from the signal of the signal is smaller than the current activation level, that value is a new activation. Set to level. On the other hand, as shown in FIG. 5C, if the value obtained by subtracting the predetermined value from the signal is equal to or higher than the current activation level, the activation level is not changed.

以上のように、近接無線通信機２０は、受信した信号に基づいた処理を実行するとともに、受信した信号の信号レベルに基づいて、起動レベルを再設定することができる。これにより、近接無線通信機２０に適切な起動レベルを設定することができる。また、起動レベルの信号を受信したときのみ、当該信号を処理するので、消費電力も抑えることができる。 As described above, the close proximity wireless transfer device 20 can execute the processing based on the received signal and reset the activation level based on the signal level of the received signal. Thereby, an appropriate activation level can be set for the close proximity wireless transfer device 20. Further, since the signal is processed only when the activation level signal is received, the power consumption can be suppressed.

また、近接無線通信機２０に適切な起動レベルが設定されるので、ユーザによる操作ミスを低減することができる。さらに、通信距離を近距離に保てるので、ノイズによる誤作動を防止でき、セキュリティも向上する。 In addition, since an appropriate activation level is set in the close proximity wireless communication device 20, operation mistakes by the user can be reduced. Furthermore, since the communication distance can be kept short, malfunctions due to noise can be prevented and security can be improved.

なお、この発明は上記実施形態に限定されず、種々の変形及び応用が可能である。 In addition, this invention is not limited to the said embodiment, A various deformation | transformation and application are possible.

例えば、図４に示した、上記実施形態の起動レベル設定処理では、信号を受信するたびに、当該信号に基づいて起動レベルを再設定するか否かを判別し、再設定すると判別された場合に（ステップＳ２０２、Ｓ２０４；Ｙｅｓ）、受信した信号の信号レベルから所定値を引いた値を新たな起動レベルに再設定していた。起動レベルの再設定の方法はこれに限定されない。例えば、過去数回の信号レベルの平均値（移動平均）をとり、その平均値から所定値を引いた値を起動レベルに再設定するようにしてもよい。また、受信した信号をローパスフィルタ処理し、極端に高い信号レベルをノイズとして排除するようにしてもよい。 For example, in the activation level setting process of the above-described embodiment shown in FIG. 4, every time a signal is received, it is determined whether or not to reset the activation level based on the signal, and when it is determined to be reset (Steps S202, S204; Yes), a value obtained by subtracting a predetermined value from the signal level of the received signal is reset to a new activation level. The method for resetting the activation level is not limited to this. For example, an average value (moving average) of signal levels of the past several times may be taken, and a value obtained by subtracting a predetermined value from the average value may be reset as the activation level. Alternatively, the received signal may be subjected to low-pass filter processing to eliminate an extremely high signal level as noise.

また、ローパスフィルタ処理した信号レベルと、過去に受信した最低の信号レベルからから算出した値と、に基づいて起動レベルを設定するようにしてもよい。例えば、ローパスフィルタ処理した信号レベルをＡ、過去に受信した最低の信号レベルをＢとすると、（Ａ−Ｂ）／３の値を誤差の範囲であるとして、前記所定値に設定する。そして、過去に受信した最低の信号レベルＢからこの所定値（（Ａ−Ｂ）／３）を引いた値を起動レベルとして再設定するようにしてもよい。このようにすることで、ローパスフィルタ処理した信号レベルと、過去に受信した最低の信号レベルと、の差が小さいときは、受信する信号レベルにばらつきが少ないとして、前記所定値を小さくすることができる。また過去に受信した最低の信号レベルと、の差が大きいときは、受信する信号レベルにばらつきが多いとして、前記所定値を大きくすることができる。 Further, the activation level may be set based on the signal level that has been subjected to the low-pass filter process and the value calculated from the lowest signal level received in the past. For example, assuming that the signal level subjected to the low-pass filter processing is A and the lowest signal level received in the past is B, the value of (A−B) / 3 is set to the predetermined value as the error range. Then, a value obtained by subtracting the predetermined value ((A−B) / 3) from the lowest signal level B received in the past may be reset as the activation level. In this way, when the difference between the low-pass filtered signal level and the lowest signal level received in the past is small, it is possible to reduce the predetermined value, assuming that there is little variation in the received signal level. it can. In addition, when the difference between the lowest signal level received in the past and the signal level is large, the predetermined value can be increased because the received signal level varies greatly.

また、上記実施形態の近接無線通信機２０は、上述した構成に限定されず、他の構成を備えてもよい。例えば、近接無線通信機を図６に示す構成（近接無線通信機１２０）としてもよい。 Further, the close proximity wireless transfer device 20 of the above embodiment is not limited to the above-described configuration, and may include other configurations. For example, the proximity wireless communication device may be configured as shown in FIG. 6 (the proximity wireless communication device 120).

図６に示すように、近接無線通信機１２０は、複数の起動電力レジスタ２８ａ〜２８ｎと、ＩＤ検出部２９と、セレクタ３０と、を備える。これら以外の構成は、図２に示した近接無線通信機２０と同様である。 As illustrated in FIG. 6, the close proximity wireless transfer device 120 includes a plurality of activation power registers 28 a to 28 n, an ID detection unit 29, and a selector 30. The other configuration is the same as that of the close proximity wireless transfer device 20 shown in FIG.

増幅回路２３は、増幅した信号をＩＤ検出部２９にも送出する。ＩＤ検出部２９は、この信号に含まれる識別情報（ＩＤ）を検出する。この場合、通信手段１０から送信される信号に、通信手段１０を識別する識別情報が含まれている必要がある。ＩＤ検出部２９は、検出した識別情報をコントローラ２１及びセレクタ３０に送出する。 The amplifier circuit 23 also sends the amplified signal to the ID detector 29. The ID detection unit 29 detects identification information (ID) included in this signal. In this case, the signal transmitted from the communication unit 10 needs to include identification information for identifying the communication unit 10. The ID detection unit 29 sends the detected identification information to the controller 21 and the selector 30.

複数の起動電力レジスタ２８ａ〜２８ｎは、各識別情報に対応した起動電力をそれぞれ記憶する。 The plurality of activation power registers 28a to 28n store activation power corresponding to each identification information.

セレクタ３０は、ＩＤ検出部２９から識別情報を受けると、その識別情報に対応した起動電力レジスタ２８ａ〜２８ｎから起動電力を読み出し、受信電力検出器２７に供給する。 When the selector 30 receives the identification information from the ID detection unit 29, the selector 30 reads the activation power from the activation power registers 28 a to 28 n corresponding to the identification information and supplies the activation power to the reception power detector 27.

受信電力検出器２７では、増幅回路２３から伝送された信号の信号レベルを、その信号に対応した起動レベルと比較することができる。 The reception power detector 27 can compare the signal level of the signal transmitted from the amplifier circuit 23 with the activation level corresponding to the signal.

また、コントローラ２１は、図４の起動レベル設定処理では、ステップＳ２０３の処理で、ＩＤ検出部２９から伝送された識別情報に対応する起動電力レジスタ２８ａ〜２８ｎに、新たな起動レベルを記憶する。これにより、識別情報に対応する起動レベルを再設定することができる。 Further, in the activation level setting process of FIG. 4, the controller 21 stores the new activation level in the activation power registers 28 a to 28 n corresponding to the identification information transmitted from the ID detection unit 29 in the process of step S <b> 203. As a result, the activation level corresponding to the identification information can be reset.

このように、近接無線通信機１２０では、識別情報毎に、即ち、通信手段１０毎に、起動電力を記憶するので、通信相手によらず適切な通信距離を保った近接通信を行うことができる。 As described above, the proximity wireless communication device 120 stores the activation power for each identification information, that is, for each communication means 10, so that it is possible to perform proximity communication with an appropriate communication distance regardless of the communication partner. .

また、図２に示した近接無線通信機２０、図６に示した近接無線通信機１２０の構成は一例であって、同等の機能を果たせればその構成は任意である。近接無線通信機２０、１２０の各構成はハードウェアで実現されてもよいし、ソフトウェアで実現されてもよい。 The configurations of the proximity wireless communication device 20 illustrated in FIG. 2 and the proximity wireless communication device 120 illustrated in FIG. 6 are examples, and the configurations are arbitrary as long as they can perform the same function. Each configuration of the close proximity wireless transfer devices 20 and 120 may be realized by hardware or may be realized by software.

また、近接無線通信機２０、１２０のコントローラ２１が実行するプログラムは予めＲＯＭに記憶されているものとして説明したが、外部の記憶媒体から取得したものであってもよいし、ネットワークを介して伝送されたものを記憶するようにしてもよい。 Moreover, although the program executed by the controller 21 of the close proximity wireless communication devices 20 and 120 has been described as being stored in the ROM in advance, it may be obtained from an external storage medium or transmitted via a network. You may make it memorize what was done.

１０…通信手段、２０、１２０…近接無線通信機、２１…コントローラ、２２…アンテナ、２３…増幅回路、２４…復調器、２５…変調器、２６…電力増幅回路、２７…受信電力検出器、２８…起動電力レジスタ、２９…ＩＤ検出部、３０…セレクタ、 DESCRIPTION OF SYMBOLS 10 ... Communication means 20, 120 ... Proximity wireless communication device, 21 ... Controller, 22 ... Antenna, 23 ... Amplifier circuit, 24 ... Demodulator, 25 ... Modulator, 26 ... Power amplifier circuit, 27 ... Received power detector, 28 ... Activation power register, 29 ... ID detector, 30 ... Selector,

Claims

Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold; and
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
With
If the value obtained by subtracting a predetermined value from the intensity of the signal detected by the signal intensity detecting unit is smaller than the currently set predetermined threshold, the resetting unit sets the value to the predetermined value. short range radio communication device characterized by re-set as the threshold value.

Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold; and
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
Identification information acquisition means for acquiring identification information from the signal received by the reception means;
Threshold storage means for storing a plurality of the predetermined thresholds in association with the identification information;
Bei to give a,
The signal strength determining means determines whether or not the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired by the identification information acquiring means;
It said resetting means, the identification information acquisition unit near distance wireless communication device you characterized by resetting the predetermined threshold corresponding to the identification information acquired.

The short distance according to claim 2 , wherein the resetting means resets a value obtained by subtracting a predetermined value from the intensity of the signal detected by the signal intensity detecting means as the new predetermined threshold value. Wireless communication device.

A receiving step for receiving a signal;
A detecting step for detecting the intensity of the signal received in the receiving step;
A determination step of determining whether or not the intensity of the signal detected in the detection step is equal to or greater than a predetermined threshold;
In the determination step, when it is determined that the intensity of the signal is equal to or higher than a predetermined threshold value, a processing step of executing processing based on the signal;
A resetting step for resetting the predetermined threshold based on the intensity of the signal detected in the detecting step;
Only including,
In the resetting step, if a value obtained by subtracting a predetermined value from the intensity of the signal detected in the detecting step is smaller than the currently set predetermined threshold value, the value is set as the predetermined threshold value. A reception control method for a short-range wireless communication device, characterized by resetting .

A receiving step for receiving a signal;
A detecting step for detecting the intensity of the signal received in the receiving step;
A determination step of determining whether or not the intensity of the signal detected in the detection step is equal to or greater than a predetermined threshold;
In the determination step, when it is determined that the intensity of the signal is equal to or higher than a predetermined threshold, a processing step for executing processing based on the signal;
A resetting step for resetting the predetermined threshold based on the intensity of the signal detected in the detecting step;
An obtaining step of obtaining identification information from the signal received in the receiving step;
A storage step of storing a plurality of the predetermined threshold values in association with the identification information;
Including
In the determination step, it is determined whether the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired in the acquisition step;
In the resetting step, the predetermined threshold value corresponding to the identification information acquired in the acquiring step is reset.
A reception control method for a short-range wireless communication device.

Computer
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold;
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
A program that functions as
If the value obtained by subtracting a predetermined value from the intensity of the signal detected by the signal intensity detecting unit is smaller than the currently set predetermined threshold, the resetting unit sets the value to the predetermined value. Program to reset as threshold .

Computer
Receiving means for receiving a signal;
Signal strength detecting means for detecting the strength of the signal received by the receiving means;
Signal strength determination means for determining whether the intensity of the signal detected by the signal strength detection means is equal to or greater than a predetermined threshold;
Processing means for executing processing based on the signal when the signal strength determination means determines that the intensity of the signal is equal to or greater than a predetermined threshold;
Resetting means for resetting the predetermined threshold based on the intensity of the signal detected by the signal strength detection means;
Identification information acquisition means for acquiring identification information from the signal received by the reception means;
Threshold storage means for storing a plurality of the predetermined threshold values in association with the identification information;
A program that functions as
The signal strength determining means determines whether or not the intensity of the signal is equal to or greater than the predetermined threshold corresponding to the identification information acquired by the identification information acquiring means;
The resetting unit resets the predetermined threshold corresponding to the identification information acquired by the identification information acquiring unit.
program.