JP3205252B2 - Mobile wireless terminal - Google Patents
Mobile wireless terminalInfo
- Publication number
- JP3205252B2 JP3205252B2 JP10285696A JP10285696A JP3205252B2 JP 3205252 B2 JP3205252 B2 JP 3205252B2 JP 10285696 A JP10285696 A JP 10285696A JP 10285696 A JP10285696 A JP 10285696A JP 3205252 B2 JP3205252 B2 JP 3205252B2
- Authority
- JP
- Japan
- Prior art keywords
- line
- value
- reconnection
- signal strength
- time interval
- 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 - Fee Related
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
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- Mobile Radio Communication Systems (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、セルラー電話等の
移動通信システムにおける移動無線端末に関し、特に、
回線が切断された場合の再接続を自動的に行う機能を有
する移動無線端末に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio terminal in a mobile communication system such as a cellular telephone.
The present invention relates to a mobile radio terminal having a function of automatically reconnecting when a line is disconnected.
【０００２】[0002]
【従来の技術】従来より、セルラー電話等の移動通信シ
ステムでは、複数の無線基地局から構成される通信可能
なサービス圏内を移動無線端末が移動して通信を行うよ
うになっている。このような移動通信システムでは、無
線チャンネルの受信信号強度が低下するなどして、通信
回線の接続状況が悪化した場合、回線が切断される。こ
のように回線接続途中に、回線が切断された場合、回線
を再接続するために、自動的に再接続動作が行われる。2. Description of the Related Art Conventionally, in a mobile communication system such as a cellular telephone, a mobile radio terminal moves and communicates within a communicable service area constituted by a plurality of radio base stations. In such a mobile communication system, the line is disconnected when the connection state of the communication line deteriorates due to a decrease in received signal strength of a wireless channel or the like. Thus, when the line is disconnected during the line connection, a reconnection operation is automatically performed to reconnect the line.
【０００３】一般的に、回線接続途中で回線が切断さ
れ、自動的に回線の再接続を試行する場合、回線を速や
かに回復させるために、再接続動作の試行時間間隔は短
く設定されている。Generally, when a line is disconnected in the course of line connection and the line is automatically reconnected, the retry operation time interval is set short in order to quickly recover the line. .
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記のよう
に再接続動作の試行時間間隔が短く設定されている場
合、移動無線端末が、無線基地局のサービス圏外に移動
して回線が切断された場合のように、回線の接続される
見込みの低い状況では、無駄な再接続動作の試行回数が
多くなり、急速に移動無線端末の電池を消耗するという
問題が生じる。If the reconnection operation trial time interval is set short as described above, the mobile radio terminal moves out of the service area of the radio base station and the line is disconnected. As in the case, when the line is unlikely to be connected, the number of unnecessary reconnection operations is increased, and the battery of the mobile wireless terminal is rapidly consumed.
【０００５】一方、再接続動作の試行時間間隔が長く設
定されている場合、前記のような電池の消耗を低減する
ことができるが、移動無線端末が基地局のサービス圏内
にあるにも関わらず、トンネルやビルの影に入る等して
一時的に回線が切断された場合、即ち回線の接続される
見込みの高い状況では、回線の回復までの再接続動作の
試行回数が少なくて済むが、一回の再接続の試行時間間
隔が長いので、回線の回復に時間がかかるという問題が
生じる。[0005] On the other hand, when the time interval for the reconnection operation is set to be long, the above-described battery consumption can be reduced, but the mobile radio terminal is located within the service area of the base station. In the case where the line is temporarily disconnected due to a shadow of a tunnel or a building, etc., that is, in a situation where the line is likely to be connected, the number of reconnection operations until the line is restored can be reduced, but Since the retry time interval for one reconnection is long, there is a problem that it takes time to recover the line.
【０００６】本発明は、上記の問題点を解決するために
なされたもので、その目的は、回線が切断された状況を
推定し、切断状況に応じて回線の再接続動作の試行時間
間隔を設定することで、電池の消耗が少なく、しかも回
線の回復を迅速に行うことができるような移動無線端末
を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to estimate a state in which a line has been disconnected and to set a trial time interval for a line reconnection operation in accordance with the disconnection state. It is an object of the present invention to provide a mobile radio terminal that can be set so that battery consumption is low and that a line can be quickly restored.
【０００７】[0007]
【課題を解決するための手段】移動無線端末は、上記の
課題を解決するために、無線基地局と無線移動通信を行
い、通信回線が切断された時に回線の再接続を所定の試
行時間間隔で行う移動無線端末において、上記回線の再
接続の試行時間間隔を、回線の切断直前の受信信号強度
に応じて設定するように構成することができる。 In order to solve the above-mentioned problems, a mobile radio terminal performs radio mobile communication with a radio base station and, when a communication line is disconnected, reconnects the line at a predetermined trial time interval. In the mobile radio terminal described in the above, the time interval of the reconnection of the line may be set according to the received signal strength immediately before the line is disconnected .
【０００８】上記の構成によれば、例えば回線の切断直
前の受信信号強度が所定値以上であれば、無線基地局の
サービス圏内で一時的に切断されたと判断し、再接続の
試行時間間隔を所定値よりも短くすることで、回線の回
復見込みの高い状況での回線回復を迅速に行うことがで
きる。また、回線直前の受信強度が所定値よりも小さけ
れば、移動無線端末が無線基地局のサービス圏外に移動
して回線が切断されたと判断し、再接続の試行時間間隔
を所定値以上に長くすることで、回線の回復見込みの低
い状況での再接続動作を繰り返すことによる電池の消耗
を少なくすることができる。According to the above configuration, for example, if the received signal strength immediately before the line disconnection is equal to or greater than the predetermined value, it is determined that the connection has been temporarily disconnected within the service area of the radio base station, and the reconnection trial time interval is set. By making the length shorter than the predetermined value, it is possible to quickly recover the line in a situation where the line recovery is likely to be high. If the reception strength immediately before the line is smaller than a predetermined value, it is determined that the mobile radio terminal has moved out of the service area of the radio base station and the line has been disconnected, and the reconnection trial time interval is made longer than the predetermined value. Thus, it is possible to reduce the consumption of the battery by repeating the reconnection operation in the situation where the line recovery is unlikely.
【０００９】請求項１の移動無線端末は、上記の課題を
解決するために、無線基地局と無線移動通信を行い、通
信回線が切断された時に回線の再接続を所定の試行時間
間隔で行う移動無線端末において、上記無線基地局との
間で信号を送受信する無線部と、無線部で受信した信号
の強度を定期的に平均化処理する信号強度平均化処理部
と、平均化処理された受信信号強度の時間的な変化率を
示す微分値を算出する信号強度微分処理部と、回線が切
断された時点で、上記受信信号強度の微分値の絶対値が
所定値以上のときには、回線再接続の試行時間間隔が短
くなるように、また、上記受信信号強度の微分値の絶対
値が所定値よりも小さいときには、回線再接続の試行時
間間隔が長くなるように試行時間間隔を制御する制御部
とを備えていることを特徴としている。[0009] mobile radio terminal according to claim 1, in order to solve the above problems, performs wireless mobile communication and the radio base station performs a reconnection of the line at a predetermined trial time interval when the communication line is disconnected In the mobile radio terminal, a radio unit that transmits and receives signals to and from the radio base station, a signal strength averaging unit that periodically averages the strength of the signal received by the radio unit, A signal strength differentiation processing unit for calculating a differential value indicating a temporal change rate of the received signal strength, and a line re-establishment function when the absolute value of the differential value of the received signal strength is equal to or more than a predetermined value when the line is disconnected. Control for controlling the trial time interval so that the trial time interval for connection is shortened, and when the absolute value of the differential value of the received signal strength is smaller than a predetermined value, the trial time interval for line reconnection is extended. Parts It is characterized in.
【００１０】上記の構成によれば、回線が切断された時
点で、制御部によって、回線切断直前の信号強度微分処
理部の微分値に基づいて回線の切断状況が推定すること
ができ、この推定状況に応じて回線の再接続の試行時間
間隔を調整し、電池の消耗の低減を図りつつ、回線の回
復を迅速に行うことができる。According to the above configuration, when the line is disconnected, the control unit can estimate the line disconnection state based on the differential value of the signal strength differential processing unit immediately before the line disconnection. It is possible to adjust the trial time interval of the line reconnection according to the situation, and to quickly recover the line while reducing the consumption of the battery.
【００１１】即ち、受信信号強度の微分値が正数あるい
は絶対値が所定値よりも小さいときには、受信信号強度
がゆるやかに変化していたことを示しており、サービス
圏外への移動が推測されるので、再接続の試行時間間隔
を長く設定することによって電池の消耗の低減を図るこ
とができる。また、受信信号強度の微分値が、負数ある
いは絶対値が所定値以上のときには、受信信号強度が急
速に変化したことを示しており、サービス圏内でトンネ
ルの通過等の一時的なシャドーイングである可能性が高
いと推測されるので、回線再接続の試行時間間隔を短く
設定することによってシャドーイングの解消後の速やか
な回線の回復を図ることができる。That is, when the differential value of the received signal strength is a positive number or the absolute value is smaller than a predetermined value, it indicates that the received signal strength has been changed slowly, and it is estimated that the received signal moves out of the service area. Therefore, the battery consumption can be reduced by setting a long retry connection time interval. In addition, when the differential value of the received signal strength is a negative number or the absolute value is equal to or more than a predetermined value, it indicates that the received signal strength has changed rapidly, which is a temporary shadowing such as a tunnel passing in the service area. Since it is presumed that the possibility is high, it is possible to quickly recover the line after the shadowing is eliminated by setting the trial time interval of the line reconnection short.
【００１２】請求項２の移動無線端末は、上記の課題を
解決するために、請求項１の構成に加えて、制御部は、
回線の再接続の試行時間間隔を、上記受信信号強度の微
分値の大きさに反比例するように制御することを特徴と
している。According to a second aspect of the present invention, in order to solve the above-mentioned problems, in addition to the configuration of the first aspect , the control unit further comprises:
It is characterized in that the trial time interval for line reconnection is controlled so as to be inversely proportional to the magnitude of the differential value of the received signal strength.
【００１３】上記の構成によれば、請求項１の作用に加
えて、回線の切断直前の回線切断状況を推定する微分値
に対応した試行時間間隔で回線の再接続動作を行うこと
ができるので、回線の回復が回線の切断時の状況に応じ
て適切に行われる。よって、回線の回復の見込みの低い
状況での無駄な回線の再接続動作を低減することで、移
動無線端末の電池の消耗を低減させると共に、回線の回
復の見込みの高い状況での回線の回復を迅速に行うこと
ができる。According to the above configuration, in addition to the effect of the first aspect, the line reconnection operation can be performed at a trial time interval corresponding to the differential value for estimating the line disconnection state immediately before the line disconnection. The line recovery is appropriately performed according to the situation at the time of the line disconnection. Therefore, by reducing unnecessary line reconnection operations in a situation where line recovery is unlikely, battery consumption of the mobile radio terminal is reduced, and line recovery in a state where line recovery is highly likely. Can be done quickly.
【００１４】請求項３の移動無線端末は、上記の課題を
解決するために、請求項１の構成に加えて、制御部は、
回線切断時点の平均化処理された受信信号強度の平均値
が上記無線部における受信感度値よりも小さければ、回
線の再接続の試行時間間隔を、予め設定された回線再接
続のための試行時間間隔の最大値に設定することを特徴
としている。According to a third aspect of the present invention, in order to solve the above problem, in addition to the configuration of the first aspect , the control unit further comprises:
If the average value of the averaged received signal strength at the time of the line disconnection is smaller than the reception sensitivity value in the radio unit, the line connection retry time interval is set to a predetermined line reconnection time. It is characterized in that it is set to the maximum value of the interval.
【００１５】上記の構成によれば、請求項１の作用に加
えて、無線基地局のサービス圏の周縁部のような受信信
号強度が不安定な場合には、回線の再接続動作の試行時
間間隔を設定値の最大にすることで、不安定な受信信号
強度の状態での断続的な回線の切断に伴う不要な回線の
再接続動作の回数を低減することができるので、移動無
線端末の電池の消耗を低減させることができる。According to the above configuration, in addition to the operation of the first aspect, when the received signal strength is unstable such as at the periphery of the service area of the radio base station, the trial time of the line reconnection operation is tried. By setting the interval to the maximum set value, the number of unnecessary line reconnection operations due to intermittent line disconnection in an unstable reception signal strength state can be reduced. Battery consumption can be reduced.
【００１６】[0016]
【発明の実施の形態】本発明の実施の一形態について図
１に基づいて説明すれば、以下の通りである。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
【００１７】本実施の形態にかかる移動無線システム
は、無線回線のサービス圏を形成する複数の無線基地局
と、これら無線基地局と無線移動通信を行う移動無線端
末とからなる。The mobile radio system according to the present embodiment includes a plurality of radio base stations forming a service area of a radio channel, and a mobile radio terminal performing radio mobile communication with these radio base stations.
【００１８】上記移動無線端末は、図１に示すように、
図示しない無線基地局との間で電波の送受信を行う無線
部１、送受信信号に対して所定の処理を行うデータ処理
部２、マイクロホン（送話部）およびイヤースピーカ
（受話部）を含む音声処理部３、移動無線端末全体の制
御を行う制御部４、受信信号強度（以下、ＲＳＳＩと称
する）を平均化処理するＲＳＳＩ平均化処理部５、平均
化されたＲＳＳＩを微分処理するＲＳＳＩ微分処理部６
からなっている。[0018] The mobile radio terminal, as shown in FIG.
A radio unit 1 for transmitting and receiving radio waves to and from a radio base station (not shown), a data processing unit 2 for performing predetermined processing on transmission / reception signals, and a voice process including a microphone (transmitting unit) and an ear speaker (receiving unit) Unit 3, a control unit 4 for controlling the entire mobile radio terminal, an RSSI averaging unit 5 for averaging received signal strength (hereinafter referred to as RSSI), an RSSI differential processing unit for differentiating the averaged RSSI 6
Consists of
【００１９】データ処理部２では、移動無線端末の作動
中、無線部１を介して入力される無線基地局からの信号
を音声データと制御データとに分離し、音声データを音
声処理部３に出力する一方、制御データを制御部４に出
力するようになっている。一方、音声処理部３からの音
声データを無線基地局に送信する場合には、音声データ
と制御部４からの制御データとを統合して、無線部１を
介して無線基地局に出力するようになっている。The data processing unit 2 separates a signal from the radio base station input via the radio unit 1 into voice data and control data during operation of the mobile radio terminal, and transmits the voice data to the voice processing unit 3. On the other hand, control data is output to the control unit 4 while outputting. On the other hand, when transmitting voice data from the voice processing unit 3 to the wireless base station, the voice data and control data from the control unit 4 are integrated and output to the wireless base station via the wireless unit 1. It has become.
【００２０】音声処理部３では、イヤースピーカから入
力された音声データを受信音声として再生する一方、マ
イクロホンから入力された音声を音声データに変換し、
データ処理部２に出力するようになっている。The audio processing unit 3 reproduces audio data input from the ear speaker as received audio, while converting audio input from the microphone into audio data.
The data is output to the data processing unit 2.
【００２１】ＲＳＳＩ平均化処理部５では、一定時間毎
（例えば２０ｍｓｅｃ毎）に無線部１の受信信号強度デ
ータを取込み平均化処理を行い、過去Ｎ個の平均化され
たＲＳＳＩN サンプルデータ（但し、Ｎは１以上の整
数）を保持するようになっている。そして、平均化処理
されたＲＳＳＩN サンプルデータを、制御部４およびＲ
ＳＳＩ微分処理部６に出力するようになっている。The RSSI averaging processing unit 5 takes in the received signal strength data of the radio unit 1 at regular time intervals (for example, every 20 msec), performs averaging processing, and obtains N past averaged RSSI N sample data (however, , N is an integer of 1 or more). The averaged RSSI N sample data is transmitted to the control unit 4 and R
The data is output to the SSI differential processing unit 6.
【００２２】ＲＳＳＩ微分処理部６では、ＲＳＳＩ平均
化処理部５のＮ個のサンプルデータから時間毎の変化率
を計算して、ＲＳＳＩの微分値を算出するようになって
いる。例えば、最新のＮ番目のサンプルに対するＲＳＳ
Ｉの微分値ＲＳＳＩdifNN は、ＲＳＳＩN-1 −ＲＳＳＩ
N で求めることができる。そして、算出された微分値Ｒ
ＳＳＩdif を、ＲＳＳＩ微分処理部６内で記憶すると共
に、制御部４に出力するようになっている。The RSSI differential processing section 6 calculates a rate of change per time from the N sample data of the RSSI averaging processing section 5 to calculate a differential value of the RSSI. For example, the RSS for the latest Nth sample
Differential value RSSIdifN N of I is, RSSI N-1 -RSSI
It can be obtained by N. Then, the calculated differential value R
The SSIdif is stored in the RSSI differential processing unit 6 and output to the control unit 4.
【００２３】制御部４は、データ処理部２からの制御デ
ータに基づいて回線制御を行うと共に、ＲＳＳＩ平均化
処理部５からの平均化されたＲＳＳＩN サンプルデータ
およびＲＳＳＩ微分処理部６からの微分値ＲＳＳＩdif
に基づいて、回線が切断されたときの再接続動作の制御
を行うようになっている。即ち、制御部４は、回線接続
途中で回線が切断されたときに、自動的に回線の再接続
動作を試行する機能を有している。The control unit 4 controls the line based on the control data from the data processing unit 2, and also performs the averaged RSSI N sample data from the RSSI averaging processing unit 5 and the differentiation from the RSSI differentiation processing unit 6. Value RSSIdif
, The reconnection operation when the line is disconnected is controlled. That is, the control unit 4 has a function of automatically attempting a line reconnection operation when a line is disconnected during line connection.
【００２４】つまり、制御部４は、何らかの要因でＲＳ
ＳＩレベルが低下し、通信回線の接続を維持できなくな
った場合、通信回線の切断処理を行うと共に、ＲＳＳＩ
微分処理部６内に記憶されている回線切断直前のＲＳＳ
Ｉ微分値を参照し、このＲＳＳＩ微分値から回線の切断
時の状況を推定し、このＲＳＳＩ微分値から推定される
回線の切断時の状況から再接続の試行時間間隔を設定
し、再接続動作を行うようになっている。That is, the control unit 4 determines that the RS
When the SI level decreases and the connection of the communication line cannot be maintained, the communication line is disconnected and the RSSI
RSS immediately before line disconnection stored in the differential processing unit 6
With reference to the I differential value, the situation at the time of line disconnection is estimated from the RSSI differential value, the reconnection trial time interval is set from the line disconnection state estimated from the RSSI differential value, and the reconnection operation is performed. It is supposed to do.
【００２５】一般に、回線接続途中で回線が切断される
理由として考えられるのは、移動無線端末が無線基地局
により形成されているサービス圏内の外に移動した場
合、サービス圏内であっても移動無線端末がシャドーイ
ングとなる場所、即ち移動無線端末がトンネルを通過し
たり、ビルの影に移動したりして移動無線端末が一時的
に電波の届かない場所に移動した場合とがある。In general, the reason why a line is disconnected during line connection may be considered when the mobile radio terminal moves out of the service area formed by the radio base station, and when the mobile radio terminal is in the service area, There are cases where the mobile radio terminal temporarily moves to a place where radio waves do not reach because the terminal is in shadowing, that is, the mobile radio terminal passes through a tunnel or moves to the shadow of a building.
【００２６】したがって、回線が切断されたとき、移動
無線端末がサービス圏外に移動した場合、回線の回復の
見込みが低く、再接続動作を試行しても無駄な場合が多
い。一方、移動無線端末がサービス圏内でシャドーイン
グとなる場所に移動した場合、回線の回復の見込みが高
く、再接続動作を試行すればすぐに回線が回復する場合
が多い。よって、移動無線端末による回線の再接続動作
による試行時間は、回線の切断された状況に基づいて設
定すれば良いことが分かる。Therefore, if the mobile radio terminal moves out of the service area when the line is disconnected, it is unlikely that the line will recover, and it is often useless to try the reconnection operation. On the other hand, if the mobile wireless terminal moves to a location where shadowing occurs within the service area, the line is likely to be recovered, and the line is often recovered immediately after a reconnection operation is attempted. Therefore, it can be seen that the trial time for the reconnection operation of the line by the mobile radio terminal may be set based on the state where the line is disconnected.
【００２７】ここで、回線の切断時の状況を推定し、こ
の推定した状況に基づいて回線の再接続動作を試行する
移動無線端末の制御部４における制御について以下に説
明する。Here, the control in the control unit 4 of the mobile radio terminal which estimates the situation at the time of line disconnection and attempts a line reconnection operation based on the estimated situation will be described below.
【００２８】回線の切断が発生した時点のＲＳＳＩの微
分値を前述のＲＳＳＩdifNN とすると、ＲＳＳＩdifNN
が負の値のときは、ＲＳＳＩが低下して回線が切断され
たことを示し、更に負の値が大きければ、切断直前に急
激にＲＳＳＩレベルが低下したことを示し、回線切断は
一時的なシャドーイングによって回線の切断が起こった
と推定される。Assuming that the differential value of the RSSI at the time of the line disconnection is RSSI difN N , RSSI difN N
Is a negative value, it indicates that the RSSI has dropped and the line has been disconnected, and if the negative value is large, it indicates that the RSSI level has dropped sharply immediately before disconnection. It is estimated that the line disconnection has occurred due to shadowing.
【００２９】一方、上記ＲＳＳＩdifNN の絶対値が比較
的小さく、更にＲＳＳＩ平均化処理部５におけるＲＳＳ
Ｉサンプルデータの値が所定値よりも小さい場合には、
ＲＳＳＩが徐々に低下していることを示し、移動無線端
末が無線基地局のサービス圏外に移動したことにより回
線の切断が起こったと推定される。On the other hand, the absolute value of the RSSI difN N is relatively small.
If the value of the I sample data is smaller than a predetermined value,
This indicates that the RSSI has gradually decreased, and it is estimated that the line has been disconnected because the mobile radio terminal has moved out of the service area of the radio base station.
【００３０】それ故、制御部４は、回線の切断がシャド
ーイングによる場合、回線の回復が直ぐに行われるもの
と判断し、回線の再接続の試行時間間隔を比較的短く設
定するようになっている。これにより、回線が切断され
たとき、短い試行時間間隔で回線の再接続動作を行うこ
とで、迅速に回線の回復を行うことができる。Therefore, when the line disconnection is caused by shadowing, the control unit 4 determines that the line is to be recovered immediately, and sets a relatively short trial time interval for the line reconnection. I have. Thus, when the line is disconnected, the line can be quickly restored by performing the line reconnection operation at a short trial time interval.
【００３１】また、制御部４は、回線の切断が移動無線
端末が無線基地局のサービス圏外への移動による場合、
回線の回復が見込み難いと判断し、回線の再接続の試行
時間間隔を比較的長く設定するようになっている。これ
により、回線が切断されたとき、長い試行時間間隔で回
線の再接続動作を行うことで、無駄な回線接続動作を低
減することができるので、移動無線端末の電池の消耗を
低減することができる。Further, the control unit 4 determines that when the line disconnection is caused by the mobile radio terminal moving out of the service area of the radio base station,
It is determined that recovery of the line is unlikely, and the time interval for reconnecting the line is set relatively long. By doing so, when the line is disconnected, the line reconnection operation is performed at a long trial time interval, so that useless line connection operation can be reduced, so that the battery consumption of the mobile wireless terminal can be reduced. it can.
【００３２】尚、上記ＲＳＳＩ平均化処理部５での受信
信号強度のサンプリング間隔は、上記２０ｍｓｅｃ毎に
限定するものではなく、数１０ｍｓｅｃ間隔であれば良
い。また、ＲＳＳＩの平均化を行う回数は、特に限定す
るものではないが、数回が望ましい。The sampling interval of the received signal strength in the RSSI averaging unit 5 is not limited to every 20 msec, but may be several tens msec. The number of times of averaging RSSI is not particularly limited, but is preferably several times.
【００３３】また、回線の再接続の試行時間間隔は、回
線の回復が早くなると見込まれる場合には回線の回復を
早くし得る値、回線の回復が遅くなると見込まれる場合
には電池の消耗を低減させる値に設定すれば良く、限定
するものではない。The time interval for reconnection of the line is a value that can speed up the recovery of the line when the recovery of the line is expected to be fast, and the consumption of the battery when the recovery of the line is expected to be slow. What is necessary is just to set to the value which reduces, and it does not limit.
【００３４】例えば、試行時間間隔の設定方法として
は、ＲＳＳＩ微分処理部６の回線切断直前の微分値であ
るＲＳＳＩdifNN の大きさに反比例した大きさで試行時
間間隔を設定する方法が考えられる。この場合、回線の
切断直前の回線切断状況を推定する微分値ＲＳＳＩdifN
N に対応した試行時間間隔で回線の再接続動作を行うこ
とができるので、回線の回復が回線の切断時の状況に応
じて適切に行われる。よって、回線の回復の見込みの低
い状況での無駄な回線の再接続動作を低減することで、
移動無線端末の電池の消耗を低減させると共に、回線の
回復の見込みの高い状況での回線の回復を迅速に行うこ
とができる。For example, as a method of setting the trial time interval, a method is conceivable in which the trial time interval is set to a magnitude inversely proportional to the magnitude of RSSI difN N , which is the differential value of the RSSI differential processing unit 6 immediately before disconnection of the line. In this case, the differential value RSSIdifN for estimating the line disconnection state immediately before the line disconnection
Since the line reconnection operation can be performed at the trial time interval corresponding to N , the line recovery is appropriately performed according to the situation at the time of the line disconnection. Therefore, by reducing unnecessary line reconnection operations in situations where line recovery is unlikely,
The battery consumption of the mobile radio terminal can be reduced, and the line can be quickly restored in a situation where the line is likely to be restored.
【００３５】上記の試行時間間隔の設定の他に、予め異
なるレベルの複数のスレショルドレベルと、これら各ス
レショルドレベルに対応した時間間隔とを記憶してお
き、ＲＳＳＩ微分処理部６の回線切断直前の微分値であ
るＲＳＳＩdifNN と、上記の各スレショルドレベルとを
比較し、その差の絶対値が所定値以内となるスレショル
ドレベルに対応した時間間隔を回線の再接続動作の試行
時間間隔とする方法がある。In addition to the setting of the trial time interval, a plurality of threshold levels having different levels and time intervals corresponding to the respective threshold levels are stored in advance, and the RSSI differential processing unit 6 immediately before the line disconnection is stored. A method of comparing the differential value RSSI difN N with each of the above threshold levels and setting a time interval corresponding to the threshold level at which the absolute value of the difference is within a predetermined value as a trial time interval of the line reconnection operation is known. is there.
【００３６】また、回線切断時のＲＳＳＩの平均レベル
が、移動無線端末の無線部１における受信感度に相当す
る値（スレショルドレベル）よりも低い場合には、ＲＳ
ＳＩ微分処理部６による微分値に基づいた試行時間間隔
を採用せず、移動無線端末が設定し得る最大の時間間隔
を試行時間間隔として設定する方法もある。この場合、
無線基地局のサービス圏の周縁部のような受信信号強度
が不安定な場合には、回線の再接続動作の試行時間間隔
を設定値の最大にすることで、不安定な受信信号強度の
状態での断続的な回線の切断に伴う不要な回線の再接続
動作の回数を低減することができるので、移動無線端末
の電池の消耗を低減させることができる。If the average RSSI level at the time of line disconnection is lower than a value (threshold level) corresponding to the reception sensitivity in the radio unit 1 of the mobile radio terminal,
There is also a method of setting the maximum time interval that can be set by the mobile radio terminal as the trial time interval without using the trial time interval based on the differential value by the SI differentiation processing unit 6. in this case,
If the received signal strength is unstable, such as at the periphery of the service area of the wireless base station, the state of the unstable received signal strength is set by maximizing the setting time for the reconnection operation trial time interval. It is possible to reduce the number of unnecessary line reconnection operations associated with the intermittent line disconnection in the above, so that the battery consumption of the mobile wireless terminal can be reduced.
【００３７】[0037]
【発明の効果】本発明の移動無線端末は、以上のよう
に、無線基地局と通信を行い、回線が切断された時に回
線の再接続を所定の試行時間間隔で行う移動無線端末に
おいて、上記回線の再接続の試行時間間隔を、回線の切
断直前の受信信号強度に応じて調整するように構成する
ことができる。 As described above, the mobile radio terminal according to the present invention communicates with the radio base station, and reconnects the line at a predetermined trial time interval when the line is disconnected. The system is configured so that the time interval between reconnection attempts is adjusted according to the received signal strength immediately before the line is disconnected.
be able to.
【００３８】それゆえ、例えば回線の切断直前の受信信
号強度が所定値以上であれば、無線基地局のサービス圏
内で一時的に切断されたと判断し、再接続の試行時間間
隔を所定値よりも短くすることで、回線の回復見込みの
高い状況での回線回復を迅速に行うことができる。ま
た、回線直前の受信強度が所定値よりも小さければ、移
動無線端末が無線基地局のサービス圏外に移動して回線
が切断されたと判断し、再接続の試行時間間隔を所定値
以上に長くすることで、回線の回復見込みの低い状況で
の再接続動作を繰り返すことによる電池の消耗を少なく
することができるという効果を奏する。Therefore, for example, if the received signal strength immediately before the line disconnection is equal to or higher than a predetermined value, it is determined that the connection has been temporarily disconnected within the service area of the radio base station, and the reconnection trial time interval is set to a value smaller than the predetermined value. By making the length shorter, it is possible to quickly perform line recovery in a situation where the line recovery is likely to be high. If the reception strength immediately before the line is smaller than a predetermined value, it is determined that the mobile radio terminal has moved out of the service area of the radio base station and the line has been disconnected, and the reconnection trial time interval is made longer than the predetermined value. As a result, there is an effect that the consumption of the battery by repeating the reconnection operation in a situation where the line recovery is unlikely can be reduced.
【００３９】請求項１の発明の移動無線端末は、以上の
ように、無線基地局と通信を行い、回線が切断されたと
きに回線の再接続を所定の試行時間間隔で行う移動無線
端末において、通信に伴う信号を送受信する無線部と、
無線部で受信した信号の強度を定期的に平均化処理する
信号強度平均化処理部と、平均化処理された受信信号強
度の時間的な変化である微分値を算出する信号強度微分
処理部と、回線が切断された時点で、受信信号強度の微
分値が、負数あるいは絶対値が所定値以上のときには、
回線再接続の試行時間間隔が短くなるように、また、上
記受信強度の微分値が、正数あるいは絶対値が所定値よ
りも小さいときには、回線再接続の試行時間間隔が長く
なるように試行時間間隔を制御する制御部とを備えてい
る構成である。The mobile radio terminal of the invention of claim 1, as described above, to communicate with the radio base station, the mobile radio terminal for reconnection of the line at a predetermined trial time interval when the line is disconnected A wireless unit for transmitting and receiving signals associated with communication,
A signal strength averaging section for periodically averaging the strength of the signal received by the radio section, and a signal strength differentiation section for calculating a differential value that is a temporal change in the averaged received signal strength. At the time when the line is disconnected, if the differential value of the received signal strength is a negative number or the absolute value is a predetermined value or more,
When the trial time interval of the line reconnection is shortened, and when the differential value of the reception strength is a positive number or an absolute value smaller than a predetermined value, the trial time is extended so that the trial time interval of the line reconnection becomes long. And a control unit for controlling the interval.
【００４０】それゆえ、回線が切断された時点で、制御
部によって、回線切断直前の信号強度微分処理部の微分
値に基づいて回線の切断状況が推定することができ、こ
の推定状況に応じて回線の再接続の試行時間間隔を調整
し、電池の消耗の低減を図りつつ、回線の回復を迅速に
行うことができるという効果を奏する。Therefore, at the time when the line is disconnected, the control unit can estimate the line disconnection state based on the differential value of the signal strength differentiation processing unit immediately before the line disconnection. It is possible to adjust the trial time interval of the line reconnection, reduce the battery consumption, and quickly restore the line.
【００４１】請求項２の発明の移動無線端末は、以上の
ように、請求項１の構成に加え、制御部が、回線の再接
続の試行時間間隔を、上記受信信号強度の微分値の大き
さに反比例するように制御する構成である。As described above, in the mobile radio terminal according to the second aspect of the present invention, in addition to the configuration of the first aspect , the control unit sets the trial time interval of the line reconnection to the magnitude of the differential value of the received signal strength. This is a configuration in which control is performed in inverse proportion to the above.
【００４２】それゆえ、請求項１の構成による効果に加
えて、回線の切断直前の回線切断状況を推定する微分値
に対応した試行時間間隔で回線の再接続動作を行うこと
ができるので、回線の回復が回線の切断時の状況に応じ
て適切に行われる。Therefore, in addition to the effect of the configuration of the first aspect , the line can be reconnected at the trial time interval corresponding to the differential value for estimating the line disconnection state immediately before the line disconnection. Recovery is appropriately performed according to the situation at the time of line disconnection.
【００４３】よって、回線の回復の見込みの低い状況で
の無駄な回線の再接続動作を低減することで、移動無線
端末の電池の消耗を低減させると共に、回線の回復の見
込みの高い状況での回線の回復を迅速に行うことができ
るという効果を奏する。Therefore, by reducing unnecessary line reconnection operations in situations where line recovery is unlikely, the battery consumption of the mobile radio terminal can be reduced, and in situations where line recovery is highly likely. There is an effect that the line can be recovered quickly.
【００４４】請求項３の発明の移動無線端末は、以上の
ように、請求項１の構成に加え、制御部は、回線切断時
点の平均化処理された受信信号強度の平均値が上記無線
部における受信感度値よりも小さければ、回線の再接続
の試行時間間隔を、予め設定された回線再接続のための
試行時間間隔の最大値に設定する構成である。According to a third aspect of the present invention, as described above, in addition to the configuration of the first aspect , the control unit further comprises: If the reception sensitivity value is smaller than the reception sensitivity value in, the trial time interval for line reconnection is set to the maximum value of the preset trial time interval for line reconnection.
【００４５】それゆえ、請求項１の構成による効果に加
えて、無線基地局のサービス圏の周縁部のような受信信
号強度が不安定な場合には、回線の再接続動作の試行時
間間隔を設定値の最大にすることで、不安定な受信信号
強度の状態での断続的な回線の切断に伴う不要な回線の
再接続動作の回数を低減することができるので、移動無
線端末の電池の消耗を低減させることができるという効
果を奏する。Therefore, in addition to the effect of the configuration of claim 1 , when the received signal strength is unstable, such as at the periphery of the service area of the radio base station, the time interval for trial of the line reconnection operation is increased. By setting the maximum value, it is possible to reduce the number of unnecessary line reconnection operations due to intermittent line disconnection in an unstable reception signal strength state. This has the effect of reducing wear.
【図１】本発明の一実施の形態に係る移動無線端末の概
略ブロック図である。FIG. 1 is a schematic block diagram of a mobile radio terminal according to an embodiment of the present invention.
１ 無線部 ４ 制御部 ５ ＲＳＳＩ平均化処理部（受信信号強度平均化処理
部） ６ ＲＳＳＩ微分処理部（受信信号強度微分処理部）Reference Signs List 1 radio unit 4 control unit 5 RSSI averaging processing unit (received signal strength averaging processing unit) 6 RSSI differential processing unit (received signal strength differential processing unit)
Claims (3)
線が切断された時に回線の再接続を所定の試行時間間隔
で行う移動無線端末において、 上記無線基地局との間で信号を送受信する無線部と、 無線部で受信した信号の強度を定期的に平均化処理する
信号強度平均化処理部と、 平均化処理された受信信号強度の時間的な変化率を示す
微分値を算出する信号強度微分処理部と、 回線が切断された時点で、上記受信信号強度の微分値の
絶対値が所定値以上のときには、回線再接続の試行時間
間隔が短くなるように、また、上記受信信号強度の微分
値の絶対値が所定値よりも小さいときには、回線再接続
の試行時間間隔が長くなるように試行時間間隔を制御す
る制御部とを備えていることを特徴とする移動無線端
末。 1. A mobile communication system comprising:
Predetermined time interval for reconnecting the line when the line is disconnected
And a radio unit for transmitting and receiving signals to and from the radio base station, and periodically averaging the strength of the signal received by the radio unit
The signal strength averaging unit and the temporal change rate of the averaged received signal strength are shown.
A signal strength differentiation processing unit for calculating a differential value, and, when the line is disconnected, the differential value of the received signal strength
If the absolute value is greater than or equal to the specified value, the time for reconnection
In order to shorten the interval, and to differentiate the received signal strength
If the absolute value of the value is smaller than the specified value, reconnect the line.
Control the trial time interval so that
A mobile wireless terminal, comprising:
End.
隔を、上記受信信号強度の微分値の大きさに反比例する
ように制御することを特徴とする請求項１記載の移動無
線端末。 2. The control unit according to claim 1, wherein the control unit is connected to a line for a trial time for reconnection.
The interval is inversely proportional to the magnitude of the differential value of the received signal strength.
2. The control system according to claim 1, wherein
Line terminal.
された受信信号強度の平均値が上記無線部における受信
感度値よりも小さければ、回線の再接続の試行時間間隔
を、予め設定された回線再接続のための試行時間間隔の
最大値に設定することを特徴とする請求項１記載の移動
無線端末。 3. The averaging process at the time of line disconnection.
The average value of the received signal strengths
If less than the sensitivity value, time between reconnection attempts
Of the trial time interval for reconnection
2. The movement according to claim 1, wherein the movement is set to a maximum value.
Wireless terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10285696A JP3205252B2 (en) | 1996-04-24 | 1996-04-24 | Mobile wireless terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10285696A JP3205252B2 (en) | 1996-04-24 | 1996-04-24 | Mobile wireless terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09289679A JPH09289679A (en) | 1997-11-04 |
| JP3205252B2 true JP3205252B2 (en) | 2001-09-04 |
Family
ID=14338575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10285696A Expired - Fee Related JP3205252B2 (en) | 1996-04-24 | 1996-04-24 | Mobile wireless terminal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3205252B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3065023B2 (en) | 1998-05-15 | 2000-07-12 | 日本電気株式会社 | Automatic calling system and mobile radio terminal |
| JP3223355B2 (en) | 1998-11-12 | 2001-10-29 | 株式会社エヌ・ティ・ティ・ドコモ | Communication control method, communication control device, recording medium, and data terminal |
| JP4502487B2 (en) * | 2000-09-21 | 2010-07-14 | 三洋電機株式会社 | Mobile terminal device |
| CA2427315C (en) * | 2001-08-31 | 2008-10-14 | Samsung Electronics Co., Ltd. | Apparatus and method for transmitting and receiving forward channel quality information in a mobile communication system |
| JP2008278050A (en) * | 2007-04-26 | 2008-11-13 | Kyocera Corp | Radio communication terminal equipment |
| JP5118549B2 (en) | 2008-05-08 | 2013-01-16 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile device, reconnection processing method |
| US9351144B2 (en) * | 2012-06-04 | 2016-05-24 | Qualcomm Incorporated | Methods and apparatus for improving NFC RF discovery based on detection of other RF activity |
| US10026280B2 (en) * | 2014-09-29 | 2018-07-17 | Huawei Technologies Co., Ltd. | Anti-lost notification method and anti-theft device |
| JP7151345B2 (en) * | 2018-10-02 | 2022-10-12 | カシオ計算機株式会社 | Wireless communication device, clock and wireless communication program |
-
1996
- 1996-04-24 JP JP10285696A patent/JP3205252B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09289679A (en) | 1997-11-04 |
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