JP3033613B2 - Intermittent reception method - Google Patents
Intermittent reception methodInfo
- Publication number
- JP3033613B2 JP3033613B2 JP3152012A JP15201291A JP3033613B2 JP 3033613 B2 JP3033613 B2 JP 3033613B2 JP 3152012 A JP3152012 A JP 3152012A JP 15201291 A JP15201291 A JP 15201291A JP 3033613 B2 JP3033613 B2 JP 3033613B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- mobile station
- base station
- intermittent reception
- interference
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無線呼出、コードレス
電話、携帯電話等の移動通信において、間欠受信動作時
の干渉回避方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for avoiding interference at the time of intermittent reception operation in mobile communication such as a radio call, a cordless telephone, and a portable telephone.
【０００２】[0002]
【従来の技術】移動通信における間欠受信技術としては
無線呼出に関するものが周知である。これは移動加入者
が有する受信機（無線呼出では移動機は受信だけだから
受信機という）を複数の群に分け、基地局は各群ごとに
順次呼出信号を送信し、受信機は自分の群に相当する時
間だけ電源をオンにして呼出信号を受信するというもの
である。基地局はフレーム同期信号の次に群番号信号を
報知し、受信機はこの群番号を受信することにより自分
の群に相当する受信時間を知るのである。これを同期と
いう。また無線呼出以外でも、自動車電話やコードレス
電話に対する間欠受信技術も公知である。例えば自動車
電話の場合には、やはり移動機を複数の群に分け、移動
機が待ち受けるチャネル、すなわち基地局は着信制御チ
ャネルで各群ごとに必要な制御信号を送信することによ
り、移動機は同期をとった後に自分の群に相当する時間
だけ電源をオンにするものであり、基本的技術は無線呼
出の場合と同様である。次にＴＤＭＡ方式を用いた場合
の間欠受信の従来例を説明する。図２はシステム構成を
簡単に示した図である。１１は基地局、１２は移動局で
ある。基地局１１と移動局１２は無線回線１３で接続さ
れる。移動局１２の動作を示すタイミングを図３に示
す。（ａ）は基地局送信信号のうち着信信号に相当する
部分、（ｂ）は移動局が電源をオンにする時間である。
１５は着信信号である。このように、移動局１２はいつ
着信があるかわからないため、着信信号が送信されるべ
き時間だけ電源をオンにしていた。2. Description of the Related Art As an intermittent reception technique in mobile communication, a technique related to a radio call is well known. This divides the receivers of the mobile subscribers (called receivers in radio paging because mobiles are only receivers), the base station transmits a paging signal for each group sequentially, and the receiver receives its own group. The power is turned on only for a time corresponding to the above, and a call signal is received. The base station broadcasts a group number signal after the frame synchronization signal, and the receiver knows the reception time corresponding to its own group by receiving this group number. This is called synchronization. In addition to the wireless calling, an intermittent receiving technique for a car phone or a cordless phone is also known. For example, in the case of a car telephone, the mobile stations are also divided into a plurality of groups, and the mobile station waits for a channel, that is, the base station transmits a necessary control signal for each group on an incoming control channel, thereby synchronizing the mobile stations. After turning on the power, the power is turned on only for the time corresponding to the user's group, and the basic technology is the same as that of the radio call. Next, a conventional example of intermittent reception using the TDMA method will be described. FIG. 2 is a diagram simply showing the system configuration. 11 is a base station and 12 is a mobile station. The base station 11 and the mobile station 12 are connected by a wireless line 13. FIG. 3 shows the timing of the operation of the mobile station 12. (A) is a portion corresponding to an incoming signal in the base station transmission signal, and (b) is a time when the mobile station turns on the power.
15 is an incoming signal. As described above, since the mobile station 12 does not know when there is an incoming call, the mobile station 12 is turned on only for the time when the incoming call signal should be transmitted.
【０００３】[0003]
【発明が解決しようとする課題】間欠受信方式をとる場
合、その間欠受信周期は移動局の接続品質（最大遅延時
間等）に影響を与える。また無線伝送においては、他の
無線局との干渉により伝送品質の劣化が発生するから、
着信信号の送信タイミングは同一システム内の無線基地
局同士では予め干渉しないように設定される。しかし、
異なるシステムの無線基地局間では予め同期をとること
は困難である。このような場合に、無線基地局で使用す
る間欠受信周期が同一であると、一旦着信信号への干渉
が発生すると長時間にわたって着信不能となる。例え
ば、クロックレートが４００ｋＨｚ、安定度が１０-6の
水晶発信器を使用したと仮定すると、１クロックずれる
には少なくとも１．２５秒かかる。着信信号長が２００
クロック分であると仮定すると着信が不能となる時間は
少なくとも２５０秒となる。無線基地局相互の水晶発信
器の安定度が同程度であると、着信不能となる時間は更
に増加する。When the intermittent reception method is used, the intermittent reception cycle affects the connection quality (maximum delay time, etc.) of the mobile station. In wireless transmission, transmission quality deteriorates due to interference with other wireless stations.
The transmission timing of the incoming signal is set in advance so that wireless base stations in the same system do not interfere with each other. But,
It is difficult to establish synchronization between radio base stations of different systems in advance. In such a case, if the intermittent reception cycle used in the wireless base station is the same, once interference with the incoming signal occurs, the incoming call cannot be received for a long time. For example, assuming that a crystal oscillator having a clock rate of 400 kHz and a stability of 10 -6 is used, it takes at least 1.25 seconds to shift one clock. Incoming signal length is 200
Assuming clock minutes, the time during which a call cannot be received is at least 250 seconds. If the stability of the crystal oscillators between the wireless base stations is almost the same, the time during which a call cannot be received further increases.
【０００４】本発明は、上記の従来の課題に鑑み、非同
期の無線基地局からの干渉があってもその回避ができ、
移動局が着信信号を長時間受信できないような状態を防
止できる方法を提供することを目的とする。[0004] In view of the above-mentioned conventional problems, the present invention can avoid interference from an asynchronous radio base station,
It is an object of the present invention to provide a method capable of preventing a state in which a mobile station cannot receive an incoming signal for a long time.
【０００５】[0005]
【課題を解決するための手段】本発明は、定期的に信号
を送出する無線基地局と、この信号を間欠的に受信する
移動局において、受信品質、すなわち干渉状態に応じて
間欠受信タイミングを変化させることを特徴する。SUMMARY OF THE INVENTION According to the present invention, a radio base station for periodically transmitting a signal and a mobile station for intermittently receiving the signal determine the intermittent reception timing according to the reception quality, that is, the interference state. It is characterized by changing.
【０００６】[0006]
【作用】本発明によれば、干渉状態に応じて間欠受信タ
イミングを変化させるから、干渉による信号非受信状態
を回避することができる。According to the present invention, the intermittent reception timing is changed according to the interference state, so that the signal non-reception state due to the interference can be avoided.
【０００７】[0007]
【実施例】図４に本発明の前提となるシステム構成を示
す。１−１と１−２は無線基地局、１−３は移動局、２
−１は無線基地局１−１が作る無線ゾーン、２−２は無
線基地局１−２が作る無線ゾーン、１−４は両無線基地
局からの信号が干渉する干渉領域である。例えば無線基
地局１−１に属する移動局はｍ個の群に分けられ、この
群分けされた移動局に対して群毎に定められたタイミン
グで呼出を行う。移動局１−３はそのうち第ｎ番目の群
に属していると仮定する。またこの移動局１−３は無線
基地局１−２からの干渉を受けていると仮定する。以下
の説明では、例えば移動局が３群に分けられ、対象の移
動局が第１群に属していると仮定して説明する。FIG. 4 shows a system configuration on which the present invention is based. 1-1 and 1-2 are radio base stations, 1-3 is a mobile station, 2
-1 is a wireless zone created by the wireless base station 1-1, 2-2 is a wireless zone created by the wireless base station 1-2, and 1-4 is an interference area where signals from both wireless base stations interfere. For example, mobile stations belonging to the radio base station 1-1 are divided into m groups, and the grouped mobile stations are called at a timing determined for each group. It is assumed that the mobile station 1-3 belongs to the n-th group. It is also assumed that the mobile station 1-3 has received interference from the radio base station 1-2. In the following description, for example, it is assumed that mobile stations are divided into three groups, and the target mobile station belongs to the first group.
【０００８】図１に本発明の第一の実施例における間欠
受信の方法を説明する。（ａ）は基地局１−１が送信す
る着信信号である。バッテリーセービング周期を単位と
して、その中でｍ個の移動局群を次々に呼出す。斜線を
付した信号部により対象となる移動局（第１群にいる）
が呼び出される。この実施例の特徴はバッテリーセービ
ング周期が同一ではなく、Ａ、Ｂ、Ｃのように１回毎に
ランダムに変更されることである。この場合、移動局も
これに同期して同一の時間に電源をオンにする必要があ
るから、このＡ、Ｂ、Ｃなる情報を移動局に教える必要
かあるが、この具体的方法については後述する。いま隣
接する基地局１−２の着信信号送出周期を例えばＴとす
る。仮にＴ＝Ａとすると、最初の着信信号は干渉する
が、次の信号はＴとは異なる間隔Ｂで送信するから干渉
を回避できる。この様子を図１の（ｂ）に示す。このよ
うに、移動局１２が着信信号非受信となるのは多くとも
連続２回であり、干渉による着信信号非受信状態を避け
ることができる。FIG. 1 illustrates a method of intermittent reception according to the first embodiment of the present invention. (A) is an incoming signal transmitted by the base station 1-1. In a unit of a battery saving cycle, m mobile station groups are called one after another. Mobile stations targeted by the shaded signal section (in the first group)
Is called. The feature of this embodiment is that the battery saving cycle is not the same, but is randomly changed every time like A, B, C. In this case, since the mobile station also needs to turn on the power at the same time in synchronization with this, it is necessary to provide the information of A, B, and C to the mobile station. This specific method will be described later. I do. Assume that the incoming signal transmission cycle of the adjacent base station 1-2 is, for example, T. If T = A, the first incoming signal interferes, but the next signal is transmitted at an interval B different from T, so that interference can be avoided. This situation is shown in FIG. In this way, the mobile station 12 does not receive the incoming signal at most twice in succession, and it is possible to avoid a state in which the mobile station 12 does not receive the incoming signal due to interference.
【０００９】また、バッテリーセービング周期Ａ、Ｂ、
Ｃの情報を移動局に通知する方法には例えば次の２つの
方法が考えられる。．バッテリーセービング周期の繰
り返し周期を報知チャネルを使って予め報知しておく。
例えば、最初の第１群の着信信号の中に、バッテリーセ
ービング周期を「Ａ、Ｂ、Ｃ−−」と予め報知する。移
動局はこれに従って、電源をオンにしていく。Further, battery saving periods A, B,
For example, the following two methods can be considered as a method of notifying the information of C to the mobile station. . The repetition cycle of the battery saving cycle is notified in advance by using the notification channel.
For example, in the first incoming call signal of the first group, the battery saving cycle is notified in advance as "A, B, C-". The mobile station turns on the power accordingly.
【００１０】．乱数の初期値と計算回数を報知チャネ
ルを用いて予め報知する。例えば、使用すべき乱数の計
算式は予めシステムで決めておき、最初の着信信号の中
で初期値と計算回数を報知する。移動局と基地局はこの
同一の条件のもとに乱数を発生させれば同一の乱数にな
るはずだから、この乱数値をバッテリーセービング周期
とする。[0010] The initial value of the random number and the number of calculations are reported in advance by using a broadcast channel. For example, the formula for calculating the random number to be used is determined in advance by the system, and the initial value and the number of calculations are reported in the first incoming signal. If the mobile station and the base station generate random numbers under these same conditions, they should be the same random numbers, so this random number value is used as the battery saving period.
【００１１】図５は本発明の他の実施例を示す着信信号
送信方法である。（ａ）は例えば基地局１−１の送信す
る着信信号の構成である。ここではバッテリーセービン
グ周期Ｔを３分割し、同一の着信信号を３回繰り返し送
信する。ただし、それぞれの区間の送信時間をａ、ｂ、
ｃと異ならせる。どの区間でもｍ群の移動局に対する着
信信号を送信するから、最も短い区間でもｍ群の信号を
送信できるように送信時間ａ、ｂ、ｃを設定する必要が
ある。従って、長い区間では時間が余るが、そこにはた
とえばダミー信号を送信すればよい。移動局は通常はこ
の３つの内のどれかの特定の区間の中で自分の群に相当
する信号を受信している。例えば第ｎ群に属する移動局
であって区間ａの信号を受信する移動局はこの区間ａの
第ｎ群宛の信号だけを受信するように周期Ｔで電源オン
にする。また（ｂ）は基地局１−２から送信する同様の
着信信号の構成である。ただし、各区間の長さはｅ、
ｆ、ｇのように基地局１−１の場合と異ならせることが
必要である。このような場合に、例えば基地局１−１配
下の移動局で区間ａの信号を受信する移動局は、隣接の
基地局１−２からの着信信号のうちのｅの区間の信号と
同一時点になるからこれと干渉してａ区間の着信信号が
受信できなくなる。そうすると、移動局は時間をａだけ
ずらして再度着信信号の受信を試みる。すると、通常は
ａとｅは異なっているから、次の区間では干渉を受けず
に着信信号を受信できることになる。受信できれば以降
はこの移動局はｂの区間の着信信号を受信すればよい。
同図（ｃ）や（ｄ）はこのことを表したものである。ま
た受信できなければ上記と同一の手順でさらに時間をｂ
だけずらして３たび着信信号の受信を行えばよい。この
ように、同一の着信情報の送出間隔ａ〜ｇを無線基地局
毎にランダムにすることにより干渉による着信信号非受
信の確率を減らすことができる。なお、これらの送出間
隔ａ〜ｇは報知チャネルを用いて予め移動局に報知して
おくことが必要である。FIG. 5 shows an incoming signal transmission method according to another embodiment of the present invention. (A) is a configuration of an incoming signal transmitted by the base station 1-1, for example. Here, the battery saving period T is divided into three, and the same incoming signal is repeatedly transmitted three times. However, the transmission time of each section is a, b,
Make it different from c. Since the incoming signal to the m groups of mobile stations is transmitted in any section, the transmission times a, b, and c need to be set so that the m groups of signals can be transmitted even in the shortest section. Therefore, although there is time left in a long section, a dummy signal may be transmitted there. A mobile station normally receives a signal corresponding to its own group in any one of these three specific sections. For example, a mobile station belonging to the n-th group and receiving a signal in the section a turns on the power at a period T so as to receive only the signal addressed to the n-th group in the section a. (B) shows a configuration of a similar incoming signal transmitted from the base station 1-2. However, the length of each section is e,
It is necessary to make f and g different from those of the base station 1-1. In such a case, for example, the mobile station that receives the signal in the section a by the mobile station under the control of the base station 1-1 is at the same time as the signal in the section e in the incoming signal from the adjacent base station 1-2. Therefore, interference with this makes it impossible to receive the incoming signal in section a. Then, the mobile station attempts to receive the incoming signal again by shifting the time by a. Then, since a and e are usually different, the incoming signal can be received without interference in the next section. If it can be received, the mobile station may receive the incoming signal in the section b.
Figures (c) and (d) illustrate this. If the signal cannot be received, the same procedure as above is used to further increase the time.
The incoming signal may be received three times with only a shift. In this way, by making the transmission intervals a to g of the same incoming information random for each wireless base station, it is possible to reduce the probability of receiving no incoming signal due to interference. Note that these transmission intervals a to g need to be reported to the mobile station in advance using a broadcast channel.
【００１２】図６は本発明を実現するための基地局の構
成の一例である。４１は公衆網等への加入者線、４２は
加入者線インタフェース、４３は信号の送受信を行う送
受信機、４４は送受信機の制御を行い着信信号を送出さ
せるための制御部、４５は各移動局の所属する着信群や
その呼出す周期等を記憶するメモリ、４６はアンテナで
ある。制御部４２はメモリ４５から取り出した呼出周期
から次に呼出信号を送出するタイミングを決定する。移
動局に着信があると、制御部５４はその移動局の属する
群番号をメモリ４５から取り出し、送受信機４３へ着信
信号の送出を指示する。このとき、実施例２では各群に
対して同一の信号を複数回繰り返し送信する。FIG. 6 shows an example of the configuration of a base station for realizing the present invention. 41 is a subscriber line to a public network or the like, 42 is a subscriber line interface, 43 is a transceiver for transmitting and receiving signals, 44 is a control unit for controlling the transceiver and transmitting an incoming signal, and 45 is each mobile unit. Reference numeral 46 denotes a memory for storing the incoming call group to which the station belongs, the calling cycle thereof, and the like. The control unit 42 determines the timing for transmitting the next call signal from the call cycle retrieved from the memory 45. When there is an incoming call at the mobile station, the control unit 54 retrieves the group number to which the mobile station belongs from the memory 45 and instructs the transceiver 43 to transmit an incoming signal. At this time, in the second embodiment, the same signal is repeatedly transmitted to each group a plurality of times.
【００１３】図７は移動局の構成の一例を示す。５１は
アンテナ、５２は送受信機、５３は干渉を検出すること
により受信信号の品質を測定するための受信品質測定
部、５４は制御部、５５はメモリ、５６は間欠受信を行
うためのタイマ、５７は電池、５８は送受信機５２、受
信品質測定部５３及び制御部５４に電源を供給するため
のスイッチである。受信品質測定部５３の構成としては
受信信号レベル測定部と受信信号の誤り検出測定部を具
備しそれらの測定結果から干渉を検出する回路が考えら
れる。移動局は信号受信を行い、干渉がある場合には以
下のように間欠受信を行う。まず実施例１の場合には、
制御部５４は干渉の有無によらずメモリ５５から次の間
欠受信すべきタイミングを取り出してタイマ５６を設定
する。また実施例２では受信した信号の干渉検出を受信
品質測定部５３で行い、その結果を制御部５４に通知す
る。制御部５４は干渉がある場合には間欠受信周期を別
の周期に切り替えて、タイマ５６に次に受信するタイミ
ングを設定する。タイマ５６は受信機を動作させる時間
になるまでスイッチ５８を切り、電池５７の消耗を防
ぐ。設定された時間になった時には、タイマ５６はスイ
ッチ５８を接続して制御部５４に時間到来を通知する。
なお、この例においては、信号受信タイミング以外はタ
イマ以外の装置は完全に電源を切断しているが、一部の
装置の電源は切断しない等の必要に応じた電力制御を行
うことも可能である。FIG. 7 shows an example of the configuration of a mobile station. 51 is an antenna, 52 is a transceiver, 53 is a reception quality measurement unit for measuring the quality of a received signal by detecting interference, 54 is a control unit, 55 is a memory, 56 is a timer for performing intermittent reception, Reference numeral 57 denotes a battery, and 58 denotes a switch for supplying power to the transceiver 52, the reception quality measurement unit 53, and the control unit 54. As a configuration of the reception quality measurement unit 53, a circuit that includes a reception signal level measurement unit and a reception signal error detection measurement unit and detects interference from the measurement results can be considered. The mobile station performs signal reception, and when there is interference, performs intermittent reception as follows. First, in the case of the first embodiment,
The controller 54 sets the timer 56 by fetching the next intermittent reception timing from the memory 55 regardless of the presence or absence of interference. In the second embodiment, the reception quality measurement unit 53 detects interference of a received signal, and notifies the control unit 54 of the result. When there is interference, the control unit 54 switches the intermittent reception cycle to another cycle, and sets the next reception timing in the timer 56. The timer 56 switches off the switch 58 until the time for operating the receiver is reached, thereby preventing the battery 57 from being consumed. When the set time comes, the timer 56 connects the switch 58 and notifies the control unit 54 of the arrival of the time.
In this example, the devices other than the timer are completely turned off except for the signal reception timing, but it is also possible to perform power control as needed, such as not turning off the power of some devices. is there.
【００１４】[0014]
【発明の効果】本発明によれば、着信信号をランダムな
周期で送信するから、一度は干渉して非受信になっても
連続した干渉を受けることはなく、確実に着信信号を受
信することができる。According to the present invention, since an incoming signal is transmitted at a random period, even if the signal once interferes and becomes non-receiving, continuous interference is not received and the incoming signal can be reliably received. Can be.
【図１】本発明の第一の実施例における着信信号送信方
法を示す。FIG. 1 shows an incoming signal transmission method according to a first embodiment of the present invention.
【図２】移動通信システム構成例を示す。FIG. 2 shows a configuration example of a mobile communication system.
【図３】従来の間欠受信方法を説明する図である。FIG. 3 is a diagram illustrating a conventional intermittent reception method.
【図４】本発明が有効となるゾーン構成例を示す。FIG. 4 shows an example of a zone configuration in which the present invention is effective.
【図５】本発明の第二の実施例における着信信号送信方
法を示す。FIG. 5 shows an incoming signal transmission method according to a second embodiment of the present invention.
【図６】本発明に適する基地局構成の一例を示す。FIG. 6 shows an example of a base station configuration suitable for the present invention.
【図７】本発明に適する移動局構成の一例を示す。FIG. 7 shows an example of a mobile station configuration suitable for the present invention.
１−１、１−２ 無線基地局 １−３ 移動局 ２−１、２−２ 無線ゾーン １─４ 干渉領域 1-1, 1-2 Wireless base station 1-3 Mobile station 2-1, 2-2 Wireless zone 1-4─ Interference area
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−72828（ＪＰ，Ａ) 特開 昭62−296632（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04B 7/24 - 7/26 H04Q 7/06 - 7/38 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-72828 (JP, A) JP-A-62-296632 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04B 7/24-7/26 H04Q 7/06-7/38
Claims (1)
動局における間欠受信方法において、 前記無線基地局は、移動局向けの同一情報の信号の送出
間隔を無線基地局毎にランダムに送出し、 前記移動局は、 間欠的に受信する信号の受信品質に応じ
て間欠受信のタイミングを変更することを特徴とする間
欠受信方法。 A mobile communication system for intermittently receiving a signal from a radio base station.
In the intermittent reception method in a mobile station, the radio base station transmits a signal of the same information to the mobile station.
An intermittent reception method , wherein an interval is randomly transmitted for each radio base station, and the mobile station changes intermittent reception timing according to the reception quality of a signal intermittently received.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3152012A JP3033613B2 (en) | 1991-06-24 | 1991-06-24 | Intermittent reception method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3152012A JP3033613B2 (en) | 1991-06-24 | 1991-06-24 | Intermittent reception method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04373322A JPH04373322A (en) | 1992-12-25 |
| JP3033613B2 true JP3033613B2 (en) | 2000-04-17 |
Family
ID=15531135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3152012A Expired - Lifetime JP3033613B2 (en) | 1991-06-24 | 1991-06-24 | Intermittent reception method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3033613B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4689003B2 (en) * | 2000-04-26 | 2011-05-25 | 株式会社Ｋｄｄｉ研究所 | Wireless terminal station |
| JP4531959B2 (en) * | 2000-09-29 | 2010-08-25 | 三菱電機株式会社 | Power line carrier communication equipment |
| WO2003009631A1 (en) * | 2001-07-13 | 2003-01-30 | Kyohei Imai | Mobile security system, advanced mobile security system and superior mobile security system |
| EP2034633B1 (en) * | 2006-06-26 | 2018-08-22 | Godo Kaisha IP Bridge 1 | Radio communication terminal device, radio communication base station device, and radio communication method |
| CN107231701A (en) * | 2016-05-26 | 2017-10-03 | 朱晓庆 | Wireless communications method, wireless communication terminal, service end and teaching are registered device |
-
1991
- 1991-06-24 JP JP3152012A patent/JP3033613B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04373322A (en) | 1992-12-25 |
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