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JPH0767164A - Intermittent reception type communication equipment - Google Patents

Intermittent reception type communication equipment

Info

Publication number
JPH0767164A
JPH0767164A JP5211681A JP21168193A JPH0767164A JP H0767164 A JPH0767164 A JP H0767164A JP 5211681 A JP5211681 A JP 5211681A JP 21168193 A JP21168193 A JP 21168193A JP H0767164 A JPH0767164 A JP H0767164A
Authority
JP
Japan
Prior art keywords
transmission
unit
timing
reception
transmission timing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP5211681A
Other languages
Japanese (ja)
Inventor
Takashi Kumagai
尚 熊谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5211681A priority Critical patent/JPH0767164A/en
Publication of JPH0767164A publication Critical patent/JPH0767164A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To receive sent message without any omission while reducing the power consumption. CONSTITUTION:This equipment is equipped with a transmitter 1 which performs transmission at specific-period transmission timing and a receiver 2 which performs wait reception at the transmission timing. The transmitter 1 is equipped with a transmission timing generation part 13 which obtains the transmission timing and a transmission control part 12 which performs transmission at transmission timing just after the generation of a request-to-send trigger when the request-to-send trigger is generated. The receiver 2 is equipped with a reception timing generation part 24 which obtains reception timing according to the transmission timing and a wait control part 25 which performs wait reception only in a specific period that is shorter than a specific period and includes the transmission timing at each specific period on the basis of the reception timing generation part 24. Further, the transmitter 1 is equipped with a maintenance signal sending-out part 15 which sends a maintenance signal at timing of a period that is specific integral multiple of the specific period, and the receiver 2 is equipped with a start-stop control part 23 which synchronizes the reception timing generation part 24 with the transmission timing generation part 13 on the basis of the maintenance signal.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、省消費電力化を図るた
めの間欠受信型通信装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent reception type communication device for saving power consumption.

【0002】[0002]

【従来の技術】送信機からの信号が何時送られて来るか
予測のできない無線通信系にあっては、受信機は常に受
信状態でなければ成らない。さもなければ、送信機から
の送信を逃してしまう。そのため、受信機は受信待ち受
け状態を保つために定常的に電力を消費している。
2. Description of the Related Art In a wireless communication system in which it is impossible to predict when a signal from a transmitter will be sent, the receiver must be in a receiving state at all times. Otherwise, you will miss the transmission from the transmitter. Therefore, the receiver constantly consumes power in order to maintain the reception standby state.

【0003】[0003]

【発明が解決しようとする課題】すなわち、送信機から
の信号が何時送られて来るか予測のできない従来の無線
通信系にあっては、送信機からの送信の無いときでも、
受信待ち受け状態を保つために定常的に電力を消費し、
無駄な電力を消費していると言う問題点があった。
That is, in the conventional wireless communication system in which it is not possible to predict when the signal from the transmitter will be sent, even when there is no transmission from the transmitter,
It constantly consumes power to keep it in the standby state,
There was a problem that it wasted power.

【0004】本発明は、上記の問題点を改善するために
成されたもので、その目的とするところは、無駄な電力
消費を低減しつつ、送信機からの送信は漏らさずに受信
可能な間欠受信型通信装置を提供することにある。
The present invention has been made in order to solve the above problems, and an object of the present invention is to reduce unnecessary power consumption while allowing transmission from a transmitter to be received without leakage. An object is to provide an intermittent reception type communication device.

【0005】[0005]

【課題を解決するための手段】本発明は上記の問題点を
解決するため、請求項1記載の発明にあっては、所定周
期の送信タイミングで送信する送信機と、前記送信タイ
ミングで待ち受け受信する受信機とを備えたことを特徴
とする。
In order to solve the above problems, the present invention provides a transmitter for transmitting at a transmission timing of a predetermined cycle, and a standby reception at the transmission timing. And a receiver that operates.

【0006】請求項2記載の発明にあっては、前記送信
機は、前記送信タイミングを採る送信タイミング発生部
と、送信要求トリガが有ると該送信要求トリガの発生直
後の前記送信タイミング時点で送信する送信制御部とを
備えたことを特徴とする。
According to another aspect of the present invention, the transmitter transmits at the transmission timing point immediately after the transmission request trigger is generated, and a transmission timing trigger if a transmission request trigger is present. And a transmission control unit for controlling the transmission.

【0007】請求項3記載の発明にあっては、前記受信
機は、前記送信タイミングに合わせて受信タイミングを
採る受信タイミング発生部と、前記受信タイミング発生
部に基づいて前記所定周期毎に前記所定周期よりも短く
且つ前記送信タイミングを包含する所定期間のみ待ち受
け受信する待受制御部とを備えたことを特徴とする。
According to another aspect of the present invention, the receiver has a reception timing generating section which takes a reception timing in accordance with the transmission timing, and the predetermined timing for each predetermined period based on the reception timing generating section. And a standby control unit that receives and receives only a predetermined period shorter than the cycle and including the transmission timing.

【0008】請求項4記載の発明にあっては、前記送信
機は前記所定周期の所定整数倍の周期のタイミングでメ
ンテナンス信号を送信するメンテナンス信号送出部を備
え、前記受信機は前記メンテナンス信号に基づいて前記
受信タイミング発生部を前記送信タイミング発生部に調
歩する調歩制御部を備えたことを特徴とする。
According to another aspect of the present invention, the transmitter includes a maintenance signal sending section for sending a maintenance signal at a timing of a cycle of a predetermined integer multiple of the predetermined cycle, and the receiver receives the maintenance signal. It is characterized by further comprising a start / stop control unit for adjusting the reception timing generation unit to the transmission timing generation unit based on the above.

【0009】[0009]

【作用】以上のように構成したことにより、請求項1記
載の発明にあっては、受信機は、送信機の送信タイミン
グに合わせて間欠的に受信状態に成る待ち受け受信であ
っても、送信機からの送信の受信を逃してしまうことは
無く、受信機を定常的に受信可能状態に維持し続ける必
要は無くなるのである。
With the above configuration, according to the first aspect of the invention, even if the receiver is the standby reception which intermittently becomes the reception state at the transmission timing of the transmitter, the reception is performed. There is no need to miss the reception of transmissions from the device, and there is no need to constantly maintain the receiver in a receivable state.

【0010】請求項2記載の発明にあっては、送信機は
送信要求トリガが発生したからと言って該送信要求トリ
ガの発生時点で直ちに送信するのでは無く、送信機は最
も遅れの少ない所定周期の送信タイミングに合わせて送
信するのである。
According to the second aspect of the invention, the transmitter does not immediately transmit when the transmission request trigger is generated just because the transmission request trigger is generated, but the transmitter has a predetermined delay with the least delay. It is transmitted at the transmission timing of the cycle.

【0011】請求項3記載の発明にあっては、送信タイ
ミング発生部と受信タイミング発生部との間のタイミン
グに僅かな狂いが生じてきても、送信機からの送信の受
信を逃してしまう確率を低減できるのである。
According to the third aspect of the present invention, even if a slight deviation occurs in the timing between the transmission timing generation section and the reception timing generation section, the probability of missing the transmission from the transmitter. Can be reduced.

【0012】請求項4記載の発明にあっては、送信タイ
ミング発生部と受信タイミング発生制御部との間のタイ
ミングの狂いを定期的に調歩して一致するよう修正でき
るので、送信タイミングと受信タイミングとの狂いが余
り酷くなる前に一致させることができるのである。
According to the present invention, the timing deviation between the transmission timing generation section and the reception timing generation control section can be periodically adjusted so as to be matched so that the transmission timing and the reception timing can be corrected. It can be matched before it gets too crazy.

【0013】[0013]

【実施例】以下、本発明に係る間欠受信型通信装置の一
実施例を図1および図2に基づいて詳細に説明する。図
1は間欠受信型通信装置を説明するブロック図であり、
(a)は送信機を示すブロック図、(b)は受信機を示
すブロック図である。図2は間欠受信型通信装置を説明
するタイミングチャートであり、(a)は送信機の送信
し得るタイミングを示し、(b)は送信機の送信要求ト
リガのタイミングを示し、(c)は送信機の実際の送信
開始タイミングを示し、(d)は受信機の受信タイミン
グを示し、(e)は時間軸を示している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the intermittent reception type communication apparatus according to the present invention will be described in detail below with reference to FIGS. FIG. 1 is a block diagram illustrating a discontinuous reception communication device,
(A) is a block diagram showing a transmitter, and (b) is a block diagram showing a receiver. 2A and 2B are timing charts for explaining the intermittent reception type communication device. FIG. 2A shows a timing that the transmitter can transmit, FIG. 2B shows a timing of a transmission request trigger of the transmitter, and FIG. The actual transmission start timing of the machine is shown, (d) shows the reception timing of the receiver, and (e) shows the time axis.

【0014】図1(a)において、1は送信機、10は
アンテナ、11は送信部、12は送信制御部、13は送
信タイミング発生部、14は送信データ出力部、15は
メンテナンス信号送出部、16は電源部、17は電源ス
イッチである。
In FIG. 1 (a), 1 is a transmitter, 10 is an antenna, 11 is a transmission unit, 12 is a transmission control unit, 13 is a transmission timing generation unit, 14 is a transmission data output unit, and 15 is a maintenance signal transmission unit. , 16 is a power supply unit, and 17 is a power switch.

【0015】アンテナ10は送信データ(伝達しようと
する音声信号あるいはデジタル信号)で変調された搬送
波を空中に放射する部分である。送信部11は、搬送波
を発生すると共に該搬送波を前記送信データで変調して
アンテナ10に出力する部分であり、送信制御部12の
制御の下で電源部16からの駆動電力の供給を間欠的に
受け、該駆動電力の供給を受けているときのみ送信状態
に成る部分である。
The antenna 10 is a portion for radiating a carrier wave modulated by transmission data (voice signal or digital signal to be transmitted) into the air. The transmission unit 11 is a unit that generates a carrier wave, modulates the carrier wave with the transmission data, and outputs the carrier wave to the antenna 10. Under the control of the transmission control unit 12, the power supply unit 16 intermittently supplies drive power. It is a portion that enters the transmission state only when receiving the driving power.

【0016】送信制御部12は、電源部16からの駆動
電力の供給を送信部11に対して行ったり停止させたり
する部分であり、送信タイミング発生部13からの送信
タイミング信号PS と送信データ出力部14からの送信
要求トリガ信号Qとを監視していて、該送信要求トリガ
信号Qを受けた時点からの最初の送信タイミング信号P
S に同期させて、電源部16からの駆動電力の供給を送
信部11に対して行うと共に送信データ出力部14に格
納記憶されている送信データを送信部11へ順次出力さ
せる部分である。また、送信制御部12は、送信タイミ
ング発生部13からの送信タイミング信号PS のカウン
トを行い、該カウント数値が予め定められた整数Nの整
数倍に成る毎に、送信タイミング発生部13からの送信
タイミング信号PS に同期させて、電源部16からの駆
動電力の供給を送信部11に対して行うと共に、後述の
メンテナンス信号送出部15に予め格納記憶してあるメ
ンテナンス信号を送信部11へ出力させる部分でもあ
る。
The transmission control section 12 is a section for supplying or stopping the supply of drive power from the power supply section 16 to the transmission section 11, and the transmission timing signal P S and transmission data from the transmission timing generation section 13. The transmission request trigger signal Q from the output unit 14 is monitored, and the first transmission timing signal P from the time when the transmission request trigger signal Q is received.
In synchronization with S , the drive power is supplied from the power supply unit 16 to the transmission unit 11, and the transmission data stored and stored in the transmission data output unit 14 is sequentially output to the transmission unit 11. In addition, the transmission control unit 12 counts the transmission timing signal P S from the transmission timing generation unit 13, and the transmission timing generation unit 13 outputs a count value each time the count value becomes an integral multiple of a predetermined integer N. The drive power is supplied from the power supply unit 16 to the transmission unit 11 in synchronization with the transmission timing signal P S, and the maintenance signal previously stored and stored in the maintenance signal transmission unit 15 described later is transmitted to the transmission unit 11. It is also the part to output.

【0017】送信タイミング発生部13はタイマーIC
(図示せず)などで構成されており、予め定められた所
定周期TS で送信タイミング信号PS を出力する部分で
ある。送信データ出力部14は、外部から入力される送
信すべき送信データを一時的に格納記憶し、該格納記憶
を完了すると送信制御部12に対して送信要求トリガ信
号Qを出力し、送信制御部12からの指示で格納記憶し
ている送信データを送信部11へ順次出力する部分であ
る。メンテナンス信号送出部15は、予め定められたメ
ンテナンス信号を格納記憶してあり、送信制御部12か
らの指示で格納記憶してあるメンテナンス信号を送信部
11へ出力する部分である。
The transmission timing generator 13 is a timer IC.
(Not shown) and the like, and is a portion that outputs the transmission timing signal P S at a predetermined cycle T S that is set in advance. The transmission data output unit 14 temporarily stores and stores transmission data to be transmitted, which is input from the outside, and outputs a transmission request trigger signal Q to the transmission control unit 12 upon completion of the storage and storage, and the transmission control unit It is a part that sequentially outputs the transmission data stored and stored in accordance with an instruction from the transmission unit 11 to the transmission unit 11. The maintenance signal transmission unit 15 is a unit that stores and stores a predetermined maintenance signal, and outputs the maintenance signal that is stored and stored according to an instruction from the transmission control unit 12 to the transmission unit 11.

【0018】なお、図1(a)において破線で囲んだA
部は、電源スイッチ17がオンされている間は電源部1
6からの駆動電力の供給を常時受けている部分を示して
いる。しかしながら、電源スイッチ17がオンされてい
る間、少なくとも送信制御部12と送信タイミング発生
部13と送信データ出力部14とは電源部16からの駆
動電力の供給を常時受けている必要があるものの、メン
テナンス信号送出部15は、駆動電力の供給を受けた後
の立ち上がり動作が速く且つ電源オン・オフの繰り返し
に対して悪影響が無ければ、送信制御部12の制御の下
で、送信タイミング発生部13からの送信タイミング信
号PS のカウント数値が予め定められた整数Nの整数倍
に成る毎に電源部16からの駆動電力の供給を間欠的に
受け、メンテナンス信号を送信部11へ出力するように
しても良く、省消費電力化を図る上ではこの方が好まし
い。
Incidentally, in FIG. 1 (a), A surrounded by a broken line
The power supply unit 1 is provided while the power switch 17 is turned on.
6 shows a portion which is constantly receiving the supply of drive power from 6. However, while the power switch 17 is turned on, at least the transmission control unit 12, the transmission timing generation unit 13, and the transmission data output unit 14 need to be constantly supplied with drive power from the power supply unit 16. The maintenance signal transmission unit 15 is controlled by the transmission control unit 12 under the control of the transmission control unit 12 if the rising operation after receiving the supply of the driving power is fast and there is no adverse effect on the repetition of power on / off. Each time the count value of the transmission timing signal P S from the power supply unit becomes an integral multiple of a predetermined integer N, drive power is supplied from the power supply unit 16 intermittently and a maintenance signal is output to the transmission unit 11. However, this is preferable in terms of power saving.

【0019】図1(b)において、2は受信機、20は
アンテナ、21は受信部、22は受信データ弁別部、2
3は調歩制御部、24は受信タイミング発生部、25は
待受制御部、26はバッファ記憶部、27はプリンタ
ー、28は電源部、29は電源スイッチである。
In FIG. 1B, 2 is a receiver, 20 is an antenna, 21 is a receiving unit, 22 is a received data discriminating unit, and 2 is a receiving data discriminating unit.
Reference numeral 3 is an start / stop control unit, 24 is a reception timing generation unit, 25 is a standby control unit, 26 is a buffer storage unit, 27 is a printer, 28 is a power supply unit, and 29 is a power switch.

【0020】アンテナ20はアンテナ10から放射され
るところの変調された搬送波を受ける部分である。受信
部21は、アンテナ20の受けたところの変調された搬
送波を復調し該復調信号を受信データ弁別部22へ出力
する部分であり、待受制御部25の制御の下で電源部2
8からの駆動電力の供給を間欠的に受け、該駆動電力の
供給を受けているときのみ受信状態に成る部分である。
受信データ弁別部22は、受信部21の出力する復調信
号が、送信データ出力部14の出力した送信データであ
るか、あるいは、メンテナンス信号送出部15の出力し
たメンテナンス信号であるかを弁別し、送信データ出力
部14の出力した送信データであれば該復調信号をバッ
ファ記憶部26へ出力し、メンテナンス信号送出部15
の出力したメンテナンス信号であれば該復調信号を調歩
制御部23へ出力する部分である。
The antenna 20 is a part that receives a modulated carrier wave radiated from the antenna 10. The receiving unit 21 is a unit that demodulates the modulated carrier wave received by the antenna 20 and outputs the demodulated signal to the reception data discriminating unit 22, and under the control of the standby control unit 25, the power supply unit 2
8 is a part which receives the drive power from 8 intermittently and is in a receiving state only when the drive power is supplied.
The reception data discriminating unit 22 discriminates whether the demodulated signal output from the receiving unit 21 is the transmission data output from the transmission data output unit 14 or the maintenance signal output from the maintenance signal transmitting unit 15, If it is the transmission data output from the transmission data output unit 14, the demodulated signal is output to the buffer storage unit 26, and the maintenance signal transmission unit 15
In the case of the maintenance signal output by the above, the demodulated signal is output to the start / stop control unit 23.

【0021】調歩制御部23は、復調して得たメンテナ
ンス信号を受けると該メンテナンス信号に基づいて、受
信タイミング発生部24の内部タイマーを送信タイミン
グ発生部13の内部タイマーに調歩する部分である。受
信タイミング発生部24はタイマーIC(図示せず)な
どで構成されており、予め定められた所定周期TR で受
信タイミング信号PR (図示せず)を出力する部分であ
る。なお、受信タイミング発生部24の所定周期T
R は、送信タイミング発生部13の所定周期TS にでき
るかぎり一致するようにされている。
Upon receiving the maintenance signal obtained by demodulation, the start / stop control section 23 is a section for adjusting the internal timer of the reception timing generation section 24 to the internal timer of the transmission timing generation section 13 based on the maintenance signal. The reception timing generation unit 24 is composed of a timer IC (not shown) and the like, and is a portion that outputs a reception timing signal P R (not shown) at a predetermined cycle T R that is set in advance. The predetermined period T of the reception timing generation unit 24
R is set to match the predetermined cycle T S of the transmission timing generator 13 as much as possible.

【0022】待受制御部25は、電源部28からの駆動
電力の供給を受信部21に対して行ったり停止させたり
する部分であり、受信タイミング発生部24の出力する
受信タイミング信号PR に基づいて、受信タイミング信
号PR 毎に所定周期TS よりも短く且つ送信タイミング
信号PS を包含する所定期間(この期間のことを以後は
ウインド期間と言う)TW の間のみ、電源部28からの
駆動電力の供給を受信部21に対して行う部分である。
バッファ記憶部26は、受信データ弁別部22が弁別し
て出力する復調信号を一時的に記憶して、該記憶した復
調信号(送信データ出力部14の出力した送信データ)
をプリンター27へ順次出力する部分である。
The standby control section 25 is a section for supplying or stopping the supply of the drive power from the power supply section 28 to the receiving section 21, and the receiving timing signal P R output from the receiving timing generating section 24. Based on this, the power supply unit 28 is provided only for a predetermined period (hereinafter, referred to as a window period) T W that is shorter than the predetermined cycle T S for each reception timing signal P R and includes the transmission timing signal P S. Is a part for supplying the driving power from the receiver 21.
The buffer storage unit 26 temporarily stores the demodulated signal discriminated and output by the reception data discriminating unit 22, and stores the demodulated signal (transmission data output by the transmission data output unit 14).
Is sequentially output to the printer 27.

【0023】なお、図1(b)において破線で囲んだB
部は、電源スイッチ29がオンされている間は電源部2
8からの駆動電力の供給を常時受けている部分を示して
いる。しかしながら、電源スイッチ29がオンされてい
る間、少なくとも受信タイミング発生部24と待受制御
部25とバッファ記憶部26とは電源部28からの駆動
電力の供給を常時受けている必要があるものの、受信デ
ータ弁別部22と調歩制御部23とは、駆動電力の供給
を受けた後の立ち上がり動作が速く且つ電源オン・オフ
の繰り返しに対して悪影響が無ければ、受信部21と同
様に待受制御部25のウインド期間TW の間のみ電源部
28からの駆動電力の供給を受けて間欠的に駆動するよ
うにしても良く、省消費電力化を図る上ではこの方が好
ましい。また、プリンター27にあっては、バッファ記
憶部26に印字すべきデータが在る場合のみ電源部28
からの駆動電力の供給を受け、バッファ記憶部26に印
字すべきデータが無くなりしだい電源部28からの駆動
電力の供給を停止する方が省消費電力化を図る上では好
ましい。
It should be noted that B surrounded by a broken line in FIG.
The power supply unit 2 is provided while the power switch 29 is turned on.
8 shows a portion which is constantly receiving the supply of drive power from 8. However, while the power switch 29 is turned on, at least the reception timing generation unit 24, the standby control unit 25, and the buffer storage unit 26 need to be constantly supplied with the drive power from the power supply unit 28. The reception data discriminating unit 22 and the start / stop control unit 23 perform the standby control similarly to the receiving unit 21 as long as the rising operation after receiving the supply of the driving power is fast and there is no adverse effect on the repetition of the power on / off. The drive power may be supplied from the power supply unit 28 only intermittently during the window period T W of the unit 25, and the drive may be intermittently performed, which is preferable in order to save power consumption. In the printer 27, the power supply unit 28 is used only when the buffer storage unit 26 has data to be printed.
It is preferable to stop the supply of drive power from the power supply unit 28 as soon as there is no more data to be printed in the buffer storage unit 26 in response to the supply of drive power from the storage unit 26 in order to save power consumption.

【0024】上述のように構成される間欠受信型通信装
置にあっては次のように運用されると共に動作する。す
なわち、送信機1にあっては、電源スイッチ17をオン
すると、電源部16からの駆動電力が、破線で囲んだA
部であるところの送信制御部12と送信タイミング発生
部13と送信データ出力部14とメンテナンス信号送出
部15とに供給される。すると、送信タイミング発生部
13は、図2(a)に示すような送信タイミング信号P
S を送信制御部12に対して予め定められた所定周期T
S で出力する。また、送信データ出力部14は、送信す
べき送信データの外部からの格納が完了すると、例えば
図2(b)に示す時刻t2 あるいは時刻t5 のように、
送信制御部12に対して送信要求トリガ信号Qを出力す
る。
The intermittent reception type communication apparatus configured as described above is operated and operates as follows. That is, in the transmitter 1, when the power switch 17 is turned on, the drive power from the power supply unit 16 is A
It is supplied to the transmission control unit 12, the transmission timing generation unit 13, the transmission data output unit 14, and the maintenance signal transmission unit 15, which are some parts. Then, the transmission timing generation unit 13 causes the transmission timing signal P as shown in FIG.
S is a predetermined period T that is predetermined for the transmission control unit 12
Output with S. Further, when the transmission data output unit 14 completes the storage of the transmission data to be transmitted from the outside, for example, as at time t 2 or time t 5 shown in FIG. 2B,
The transmission request trigger signal Q is output to the transmission control unit 12.

【0025】すると、送信制御部12は、該送信要求ト
リガ信号Qを受けた時点t2 からの最初の時刻t3 の送
信タイミング信号PS に同期して、また、時点t5 から
の最初の時刻t6 の送信タイミング信号PS に同期し
て、電源部16からの駆動電力の供給をリレー接点(図
示せず)あるいは半導体スイッチィング素子(図示せ
ず)などを介して送信部11に対して行うと共に、送信
データ出力部14に記憶格納されたところの送信データ
を送信部11へ順次出力させる。すると、電源部16か
らの駆動電力の供給を受けた送信部11は、速やかに搬
送波を発生すると共に該搬送波を送信データ出力部14
からの送信データにて変調してアンテナ10へ出力す
る。そして、アンテナ10から送信データにて変調され
たところの該搬送波が放射される。従って、送信要求ト
リガ信号Qが発生してから期間TX の間だけ前記搬送波
の放射されるタイミングは遅れるものの、所定周期TS
は実用上許容される範囲内の周期とされるので問題は無
い。
Then, the transmission control unit 12 synchronizes with the transmission timing signal P S at the first time t 3 from the time t 2 when the transmission request trigger signal Q is received, and also at the first time from the time t 5 . In synchronization with the transmission timing signal P S at time t 6 , the drive power supply from the power supply unit 16 is supplied to the transmission unit 11 via a relay contact (not shown) or a semiconductor switching element (not shown). The transmission data stored and stored in the transmission data output unit 14 is sequentially output to the transmission unit 11. Then, the transmission unit 11 that receives the supply of the driving power from the power supply unit 16 promptly generates a carrier wave and transmits the carrier wave to the transmission data output unit 14
It is modulated with the transmission data from and output to the antenna 10. Then, the carrier wave that has been modulated by the transmission data is radiated from the antenna 10. Therefore, although the emission timing of the carrier wave is delayed by the period T X after the transmission request trigger signal Q is generated, the predetermined period T S
Is a period within a practically acceptable range, so there is no problem.

【0026】また、送信制御部12は、送信タイミング
発生部13からの送信タイミング信号PS のカウント数
値が予め定められた整数Nの整数倍に成る毎に、すなわ
ち、予め定められた所定周期TM (但しTM =N×
S )毎に、送信タイミング発生部13からの送信タイ
ミング信号PS に同期させて、電源部16からの駆動電
力の供給を送信部11に対して行うと共に、メンテナン
ス信号送出部15に予め格納記憶してあるメンテナンス
信号を送信部11へ出力させる。すると、電源部16か
らの駆動電力の供給を受けた送信部11は、速やかに搬
送波を発生すると共に該搬送波をメンテナンス信号送出
部15からのメンテナンス信号にて変調してアンテナ1
0へ出力する。そして、アンテナ10からメンテナンス
信号にて変調されたところの該搬送波が放射される。
Further, the transmission control unit 12 causes the transmission timing signal P S from the transmission timing generation unit 13 to be an integer multiple of a predetermined integer N, that is, a predetermined cycle T. M (however, T M = N ×
T S ), the drive power is supplied from the power supply unit 16 to the transmission unit 11 in synchronization with the transmission timing signal P S from the transmission timing generation unit 13 and stored in the maintenance signal transmission unit 15 in advance. The stored maintenance signal is output to the transmission unit 11. Then, the transmitter 11 which receives the supply of the driving power from the power source 16 promptly generates a carrier wave and modulates the carrier wave with the maintenance signal from the maintenance signal transmitter 15 to modulate the carrier wave.
Output to 0. Then, the carrier wave that has been modulated by the maintenance signal is radiated from the antenna 10.

【0027】つまり、送信機1は、送信データやメンテ
ナンス信号を電波として送信する必要のある場合には、
送信タイミング発生部13からの送信タイミング信号P
S に常に同期してアンテナ10から放射し送信するので
ある。しかも、送信機1の送信部11は、通常はオフさ
れており、送信データやメンテナンス信号を電波として
送信する必要のある場合のみオンされて送信データやメ
ンテナンス信号を電波として送信する。すなわち、送信
部11は送信の必要なときのみオンされ電源部16から
の駆動電力を消費するのみなので、送信部11の電源部
16からの駆動電力の消費は間欠的になり、送信機1の
省消費電力化が図られる。
That is, when the transmitter 1 needs to transmit the transmission data and the maintenance signal as radio waves,
Transmission timing signal P from the transmission timing generator 13
The antenna 10 always radiates and transmits in synchronization with S. Moreover, the transmitter 11 of the transmitter 1 is normally turned off, and is turned on only when it is necessary to transmit the transmission data and the maintenance signal as radio waves, and transmits the transmission data and the maintenance signal as radio waves. That is, the transmission unit 11 is turned on only when transmission is necessary and consumes drive power from the power supply unit 16 only. Therefore, the drive power consumption from the power supply unit 16 of the transmission unit 11 is intermittent and the transmitter 1 Power consumption can be reduced.

【0028】一方、受信機2にあっては、電源スイッチ
29をオンすると、電源部28からの駆動電力は、破線
で囲んだB部であるところの受信データ弁別部22と調
歩制御部23と受信タイミング発生部24と待受制御部
25とバッファ記憶部26とプリンター27とに供給さ
れる。すると、待受制御部25は受信部21に対して電
源部28からの駆動電力を受信部21へ供給する。する
と、受信部21は、アンテナ10から放射されてアンテ
ナ20の受けるところの変調された搬送波を受信し復調
し得る状態に速やかに成る。なお、待受制御部25は、
受信部21が電源スイッチ29をオンした後に最初のメ
ンテナンス信号を受信する迄の間は、受信部21に対し
て連続して電源部28からの駆動電力を受信部21へ供
給するようにされている。
On the other hand, in the receiver 2, when the power switch 29 is turned on, the drive power from the power supply unit 28 is received by the reception data discriminating unit 22 and the start / stop control unit 23, which is the portion B surrounded by the broken line. It is supplied to the reception timing generation unit 24, the standby control unit 25, the buffer storage unit 26, and the printer 27. Then, the standby control unit 25 supplies the drive power from the power supply unit 28 to the receiving unit 21. Then, the receiving unit 21 quickly enters a state in which it can receive and demodulate the modulated carrier wave radiated from the antenna 10 and received by the antenna 20. The standby control unit 25
Until the receiving unit 21 receives the first maintenance signal after turning on the power switch 29, the receiving unit 21 is continuously supplied with drive power from the power source unit 28. There is.

【0029】そこで、受信部21は、しばらくすると、
送信機1からのメンテナンス信号により変調された搬送
波を受信して復調し、復調して得た該メンテナンス信号
を受信データ弁別部22へ出力する。すると、受信デー
タ弁別部22は該メンテナンス信号を調歩制御部23へ
出力する。すると、調歩制御部23は、該メンテナンス
信号に基づいて、受信タイミング発生部24の内部タイ
マーを送信タイミング発生部13の内部タイマーに調歩
させ、受信タイミング発生部24の駆動をスタートさせ
る。すると、受信タイミング発生部24は、待受制御部
25に対して予め定められた所定周期TR で受信タイミ
ング信号PR (図示せず)を出力するように成る。但
し、TR ≒TS とされている。
Therefore, after a while, the receiving section 21
The carrier wave modulated by the maintenance signal from the transmitter 1 is received and demodulated, and the maintenance signal obtained by demodulation is output to the reception data discriminating unit 22. Then, the reception data discriminating unit 22 outputs the maintenance signal to the start / stop control unit 23. Then, the start / stop control unit 23 causes the internal timer of the reception timing generation unit 24 to start / stop the internal timer of the transmission timing generation unit 13 based on the maintenance signal, and starts driving of the reception timing generation unit 24. Then, the reception timing generator 24 outputs the reception timing signal P R (not shown) to the standby controller 25 at a predetermined cycle T R. However, T R ≈T S.

【0030】すると、待受制御部25は、図2(d)に
示すように、所定周期TS よりも短く且つ送信タイミン
グ信号PS を包含するウインド期間TW の間のみ、電源
部28からの駆動電力を受信部21へ供給するように成
る。すると、受信部21は、間欠的に図2(d)に示す
ウインド期間TW の間のみ電源部28からの駆動電力の
供給を受けると共に、アンテナ10から放射されてアン
テナ20の受けるところの変調された搬送波を間欠的に
ウインド期間TW の間のみ受信し復調し得る状態に成
る。
Then, as shown in FIG. 2D, the standby control section 25 outputs power from the power supply section 28 only during the window period T W shorter than the predetermined period T S and including the transmission timing signal P S. The driving power of is supplied to the receiving unit 21. Then, the receiving unit 21 is intermittently supplied with the driving power from the power supply unit 28 only during the window period T W shown in FIG. 2D, and is modulated by the antenna 20 radiated from the antenna 10. The generated carrier wave is intermittently received and demodulated only during the window period T W.

【0031】一旦、受信部21が間欠的にウインド期間
W の間のみ電源部28からの駆動電力の供給を受け搬
送波を間欠的に受信し復調し得る状態に成ると、受信部
21は電源部28からの駆動電力を連続して消費しない
ので、デユーティ比(TW /TR )に比例する分だけ省
消費電力化を図ることができる。しかも、送信機1は送
信タイミング信号PS に同期して送信を開始するので、
受信機2は送信機1からの送信の受信を逃すことはな
く、受信部21は送信部11の出力する変調された搬送
波を受信すると共に復調して受信データ弁別部22へ出
力する。すると、受信データ弁別部22は、復調信号が
送信データ出力部14の出力した送信データであれば該
復調信号をバッファ記憶部26へ出力し、復調信号がメ
ンテナンス信号送出部15の出力したメンテナンス信号
であれば該復調信号を調歩制御部23へ出力する。
Once the receiving unit 21 is intermittently supplied with drive power from the power supply unit 28 only during the window period T W and is in a state where it can intermittently receive and demodulate a carrier wave, the receiving unit 21 is powered. Since the drive power from the unit 28 is not continuously consumed, the power consumption can be reduced by an amount proportional to the duty ratio (T W / T R ). Moreover, since the transmitter 1 starts transmission in synchronization with the transmission timing signal P S ,
The receiver 2 never misses the transmission from the transmitter 1, and the receiver 21 receives the modulated carrier wave output from the transmitter 11, demodulates it, and outputs it to the received data discriminator 22. Then, if the demodulated signal is the transmission data output by the transmission data output unit 14, the reception data discrimination unit 22 outputs the demodulated signal to the buffer storage unit 26, and the demodulated signal is the maintenance signal output by the maintenance signal transmission unit 15. If so, the demodulated signal is output to the start / stop control unit 23.

【0032】送信データ出力部14の出力した送信デー
タの復調信号を受けたバッファ記憶部26は、該復調信
号を一時的に記憶して順次プリンターへ出力する。プリ
ンターはバッファ記憶部26からの出力に基づいて送信
データ出力部14の出力した送信データを順次印字す
る。また、メンテナンス信号送出部15の出力したメン
テナンス信号の復調信号を定期的に受ける調歩制御部2
3は、成し得る限りTR≒TS とされているとは言えど
も僅かな狂いが有るために生じる次第に増大する送信タ
イミング発生部13の内部タイマーと受信タイミング発
生部24の内部タイマーとの狂いを定期的に正し、ウイ
ンド期間TW で狂いを吸収できなくなる以前に調歩す
る。
Upon receiving the demodulation signal of the transmission data output from the transmission data output unit 14, the buffer storage unit 26 temporarily stores the demodulation signal and sequentially outputs it to the printer. The printer sequentially prints the transmission data output by the transmission data output unit 14 based on the output from the buffer storage unit 26. In addition, the start / stop control unit 2 that regularly receives the demodulation signal of the maintenance signal output from the maintenance signal transmission unit 15
Although 3 is set as T R ≈T S as much as possible, the internal timer of the transmission timing generation unit 13 and the internal timer of the reception timing generation unit 24 increase gradually due to a slight deviation. Correct the madness regularly and walk before it becomes impossible to absorb the madness during the window period T W.

【0033】上述の説明から明らかのように、送信タイ
ミング発生部13の出力する送信タイミング信号PS
周期TS およびメンテナンス信号の送信周期TM (但し
M=N×TS )は長ければ長いほど省消費電力化は可
能ではあるものの、送信タイミング信号PS の周期TS
が長ければ長いほど、確率的に送信データ出力部14か
らの送信要求トリガ信号Qの出力が有ってから実際に送
信される迄の遅れ時間Tx も長くなる傾向があり、メン
テナンス信号の送信周期TM が長ければ長いほど、送信
タイミング発生部13の内部タイマーと受信タイミング
発生部24の内部タイマーとの狂いを吸収するためのウ
インド期間TW を長くしなければ送信機1からの送信の
受信を逃してしまう確率が高く成る。従って、実用上支
障のないレベルに、送信タイミング信号PS の周期TS
およびメンテナンス信号の送信周期TM を設定する必要
がある。
As is clear from the above description, if the period T S of the transmission timing signal P S output by the transmission timing generator 13 and the transmission period T M of the maintenance signal (where T M = N × T S ) are long. although longer saving power consumption can be certain, period T S of the transmission timing signal P S
Is longer, the delay time T x from when the transmission request trigger signal Q is stochastically output from the transmission data output unit 14 to when the transmission is actually performed tends to be longer, and the maintenance signal is transmitted. The longer the period T M , the longer the window period T W for absorbing the deviation between the internal timer of the transmission timing generation unit 13 and the internal timer of the reception timing generation unit 24 becomes. The probability of missing the reception increases. Therefore, the period T S of the transmission timing signal P S is set to a level that causes no practical problem.
And it is necessary to set the transmission cycle T M of the maintenance signal.

【0034】なお、本発明は上記実施例に限定されるも
のではなく、無線通信装置のみならず有線通信装置にあ
っても、間欠受信とすることによって省消費電力化を図
ることが可能であることは言うまでもなく、本発明は有
線通信装置をも含むものである。
The present invention is not limited to the above embodiment, and power consumption can be reduced not only in the wireless communication device but also in the wired communication device by the intermittent reception. Needless to say, the present invention also includes a wired communication device.

【0035】[0035]

【発明の効果】本発明の間欠受信型通信装置は上述のよ
うに構成したものであるから、請求項1記載の発明にあ
っては、受信機は、送信機の送信タイミングに合わせて
間欠的に受信状態に成る待ち受け受信であっても、送信
機からの送信の受信を逃してしまうことは無く、受信機
を定常的に受信状態に維持し続ける必要は無くなるので
省消費電力化が実現でき、請求項2記載の発明にあって
は、送信機は、送信要求トリガが発生したからと言って
該送信要求トリガの発生時点で直ちに送信するのでは無
く、最も遅れの少ない所定周期の送信タイミングに合わ
せて送信するようになるので、省消費電力化を実現しつ
つ比較的遅れの少ない通信が可能となり、請求項3記載
の発明にあっては、送信タイミング発生部と受信タイミ
ング発生部との間のタイミングに僅かな狂いが生じてき
ても、送信機からの送信の受信を逃してしまう確率を低
減でき、請求項4記載の発明にあっては、送信タイミン
グ発生部と受信タイミング発生制御部との間のタイミン
グの狂いを定期的に修正して調歩できるので、送信タイ
ミング発生部および受信タイミング発生制御部のタイミ
ング発生周期精度をある程度緩和することが可能で安価
に構成できる、優れた間欠受信型通信装置を提供できる
と言う効果を奏する。
Since the intermittent reception type communication device of the present invention is constructed as described above, in the invention of claim 1, the receiver is intermittently adjusted in accordance with the transmission timing of the transmitter. Even if it is a standby reception that is in the receiving state, it does not miss the reception of the transmission from the transmitter, and it is not necessary to constantly keep the receiver in the receiving state, so power consumption can be saved. According to the second aspect of the present invention, the transmitter does not immediately transmit at the time when the transmission request trigger is generated just because the transmission request trigger is generated, but the transmission timing of the predetermined cycle with the smallest delay. Since the transmission is performed in accordance with the above, it is possible to realize communication with a relatively small delay while realizing power saving, and in the invention according to claim 3, the transmission timing generation unit and the reception timing generation unit are combined. while Even if a slight deviation occurs in the timing, the probability of missing the reception of the transmission from the transmitter can be reduced. In the invention according to claim 4, the transmission timing generation unit and the reception timing generation control unit are Since it is possible to periodically correct the timing deviation between the intervals and adjust the timing, it is possible to moderate the timing generation cycle accuracy of the transmission timing generation section and the reception timing generation control section to some extent, and it is possible to configure inexpensively. There is an effect that a device can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係る間欠受信型通信装置の一実施例を
説明するブロック図であり、(a)は送信機を示すブロ
ック図、(b)は受信機を示すブロック図である。
FIG. 1 is a block diagram illustrating an embodiment of a discontinuous reception communication apparatus according to the present invention, in which (a) is a block diagram showing a transmitter and (b) is a block diagram showing a receiver.

【図2】上記実施例の間欠受信型通信装置の動作を説明
するタイミングチャートであり、(a)は送信機の送信
し得るタイミングを示し、(b)は送信機の送信要求ト
リガのタイミングを示し、(c)は送信機の実際の送信
開始タイミングを示し、(d)は受信機の受信タイミン
グを示し、(e)は時間軸を示している。
2A and 2B are timing charts for explaining the operation of the intermittent reception type communication device of the above embodiment, where FIG. 2A shows the timing at which the transmitter can transmit, and FIG. 2B shows the timing of the transmission request trigger of the transmitter. (C) shows the actual transmission start timing of the transmitter, (d) shows the reception timing of the receiver, and (e) shows the time axis.

【符号の説明】[Explanation of symbols]

1 送信機 12 送信制御部 13 送信タイミング発生部 15 メンテナンス信号送出部 2 受信機 23 調歩制御部 24 受信タイミング発生部 25 待受制御部 PS 送信タイミング Q 送信要求トリガ TS 所定周期 TW 所定期間1 transmitter 12 transmission control unit 13 transmission timing generation unit 15 maintenance signal transmission unit 2 receiver 23 start / stop control unit 24 reception timing generation unit 25 standby control unit P S transmission timing Q transmission request trigger T S predetermined cycle T W predetermined period

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 所定周期の送信タイミングで送信する送
信機と、前記送信タイミングで待ち受け受信する受信機
とを備えたことを特徴とする間欠受信型通信装置。
1. An intermittent reception type communication device comprising: a transmitter that transmits at a transmission timing of a predetermined cycle; and a receiver that waits and receives at the transmission timing.
【請求項2】 前記送信機は、前記送信タイミングを採
る送信タイミング発生部と、送信要求トリガが有ると該
送信要求トリガの発生直後の前記送信タイミング時点で
送信する送信制御部とを備えたことを特徴とする請求項
1記載の間欠受信型通信装置。
2. The transmitter includes a transmission timing generation unit that takes the transmission timing, and a transmission control unit that transmits at the transmission timing immediately after the generation of the transmission request trigger if there is a transmission request trigger. The intermittent reception type communication device according to claim 1.
【請求項3】 前記受信機は、前記送信タイミングに合
わせて受信タイミングを採る受信タイミング発生部と、
前記受信タイミング発生部に基づいて前記所定周期毎に
前記所定周期よりも短く且つ前記送信タイミングを包含
する所定期間のみ待ち受け受信する待受制御部とを備え
たことを特徴とする請求項1記載または請求項2記載の
間欠受信型通信装置。
3. The receiver includes a reception timing generation unit that takes a reception timing according to the transmission timing,
2. A standby control unit that waits for reception only for a predetermined period that is shorter than the predetermined period and includes the transmission timing based on the reception timing generation unit, according to claim 1. The intermittent reception communication device according to claim 2.
【請求項4】 前記送信機は前記所定周期の所定整数倍
の周期のタイミングでメンテナンス信号を送信するメン
テナンス信号送出部を備え、前記受信機は前記メンテナ
ンス信号に基づいて前記受信タイミング発生部を前記送
信タイミング発生部に調歩する調歩制御部を備えたこと
を特徴とする請求項1記載乃至請求項3記載の間欠受信
型通信装置。
4. The transmitter includes a maintenance signal transmission unit that transmits a maintenance signal at a timing of a cycle that is a predetermined integral multiple of the predetermined cycle, and the receiver includes the reception timing generation unit based on the maintenance signal. 4. The intermittent reception type communication device according to claim 1, further comprising a start / stop control unit that starts / stops the transmission timing generation unit.
JP5211681A 1993-08-26 1993-08-26 Intermittent reception type communication equipment Pending JPH0767164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5211681A JPH0767164A (en) 1993-08-26 1993-08-26 Intermittent reception type communication equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5211681A JPH0767164A (en) 1993-08-26 1993-08-26 Intermittent reception type communication equipment

Publications (1)

Publication Number Publication Date
JPH0767164A true JPH0767164A (en) 1995-03-10

Family

ID=16609830

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5211681A Pending JPH0767164A (en) 1993-08-26 1993-08-26 Intermittent reception type communication equipment

Country Status (1)

Country Link
JP (1) JPH0767164A (en)

Cited By (7)

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JPH1127743A (en) * 1997-06-30 1999-01-29 Hitachi Ltd Mobile phone equipment
JP2002517941A (en) * 1998-06-01 2002-06-18 タンティビ・コミュニケーションズ・インコーポレーテッド High-speed acquisition of traffic channels to obtain high-speed variable data transfer rates
JP2007215085A (en) * 2006-02-13 2007-08-23 Mitsubishi Heavy Ind Ltd Wireless tag and wireless tag system
US7664126B2 (en) 2002-07-31 2010-02-16 Sharp Kabushiki Kaisha Data communication apparatus, intermittent communication method therefor, program describing the method and recording medium for recording the program
US9775115B2 (en) 2000-12-01 2017-09-26 Intel Corporation Antenna control system and method
US9807714B2 (en) 2000-02-07 2017-10-31 Intel Corporation Minimal maintenance link to support synchronization
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1127743A (en) * 1997-06-30 1999-01-29 Hitachi Ltd Mobile phone equipment
JP2012213217A (en) * 1998-06-01 2012-11-01 Ipr Licensing Inc Fast acquisition of traffic channels for highly variable data rate
JP2013081254A (en) * 1998-06-01 2013-05-02 Intel Corp Fast acquisition of traffic channels for highly variable data rate
JP2008079327A (en) * 1998-06-01 2008-04-03 Tantivy Communications Inc Fast acquisition of traffic channels for high speed variable data transfer rates
JP2009268140A (en) * 1998-06-01 2009-11-12 Tantivy Communications Inc Fast acquisition of traffic channel for obtaining highly variable data transfer rate
JP2002517941A (en) * 1998-06-01 2002-06-18 タンティビ・コミュニケーションズ・インコーポレーテッド High-speed acquisition of traffic channels to obtain high-speed variable data transfer rates
JP2012019528A (en) * 1998-06-01 2012-01-26 Ipr Licensing Inc Fast acquisition of traffic channels for highly variable data rate transmission rate
US9807714B2 (en) 2000-02-07 2017-10-31 Intel Corporation Minimal maintenance link to support synchronization
US9775115B2 (en) 2000-12-01 2017-09-26 Intel Corporation Antenna control system and method
US9924468B2 (en) 2000-12-01 2018-03-20 Intel Corporation Antenna control system and method
US7664126B2 (en) 2002-07-31 2010-02-16 Sharp Kabushiki Kaisha Data communication apparatus, intermittent communication method therefor, program describing the method and recording medium for recording the program
JP2007215085A (en) * 2006-02-13 2007-08-23 Mitsubishi Heavy Ind Ltd Wireless tag and wireless tag system
JP4691639B2 (en) * 2006-02-13 2011-06-01 国立大学法人横浜国立大学 Wireless tag and wireless tag system
GB2560392A (en) * 2017-07-05 2018-09-12 Wearable Link Ltd Geofencing system
GB2560392B (en) * 2017-07-05 2019-08-21 Wearable Link Ltd Geofencing system
US11443608B2 (en) 2017-07-05 2022-09-13 Wearable Link Limited Wearable devices

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