JP2004088154A

JP2004088154A - Mobile communication terminal, stand-by control method, and stand-by control program

Info

Publication number: JP2004088154A
Application number: JP2002242440A
Authority: JP
Inventors: Kiyoto Nagata; 永田　清人; Mitsuru Murata; 村田　充; Shoji Nakatsuchi; 中土　昌治; Masutada Mori; 毛利　益忠; Kosuke Kakuno; 覚野　浩介
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2002-08-22
Filing date: 2002-08-22
Publication date: 2004-03-18
Anticipated expiration: 2022-08-22
Also published as: JP3669978B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communication terminal in which power consumption is small and preferable communication can be realized, even when two radio receiving units corresponding to different communication systems are provided. <P>SOLUTION: The mobile communication terminal 1 is provided with a cellular telephone network radio receiving unit 2 and a radio LAN radio receiving unit 3. The terminal 1 detects whether it exists in each of a cellular telephone network zone or a radio LAN zone, from the reception strength of radio waves received by any one in a stand-by operation state, of the units 2 and 3. Also, a fading pitch measuring unit 5 measures the fading pitch from the radio waves received by any one in a stand-by operation state, of both the receiving units. A stand-by control unit 6 controls the stand-by operations of both the receiver units, according to the detection result by a communication network detecting unit 4 and the fading pitch. Thus, the terminal 1 can realize preferable communication according to the moving states thereof and reduce the power consumption. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、移動通信端末に関する。
【０００２】
【従来の技術】
近年、携帯電話網と、無線ＬＡＮ網のように、異なる二つの通信網を利用した通信が可能な移動通信端末が普及してきている。このような移動通信端末は、異なる二つの通信網からの電波をそれぞれ受信するために、二つの無線受信部を備えている。
【０００３】
【発明が解決しようとする課題】
上述のように二つの無線受信部を備える従来の移動通信端末においては、その移動状況の変化があっても好適な通信を実現するために、それぞれの無線受信部の待受け動作を常にＯＮにしておく必要がある。その結果、電力を多く消費するという問題点があった。
【０００４】
本発明は、このような問題点に鑑みてなされたものであり、二つの無線受信部を備えても、消費電力が少なく、かつ移動状況の変化に対応して好適な通信を実現できる移動通信端末を提供する。
【０００５】
【課題を解決するための手段】
上記課題を解決するため、本発明の移動通信端末は、所定の無線通信方式による第１の通信網からの電波を受信する第１の受信手段と、上記第１の通信網より通信エリアが狭く、通信速度の速い無線通信方式による第２の通信網からの電波を受信する第２の受信手段とを備える移動通信端末において、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段に受信される電波の受信強度に基づいて、上記第１及び第２の通信網のそれぞれの通信圏内に存在するか否かを検出する通信網検出手段と、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段によって受信される電波に基づいて、フェージングピッチを計測するフェージングピッチ計測手段と、上記通信網検出手段による検出結果と、上記フェージングピッチ計測手段によって計測される上記フェージングピッチに基づいて、上記第１の受信手段と上記第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する待受け制御手段とを備えることを特徴としている。
【０００６】
また、上記課題を解決するため、本発明の待受け制御方法は、所定の無線通信方式による第１の通信網からの電波を受信する第１の受信手段と、上記第１の通信網より通信エリアが狭く、通信速度の速い無線通信方式による第２の通信網からの電波を受信する第２の受信手段とを備える移動通信端末の待受け制御方法であって、通信網検出手段が、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段に受信される電波の受信強度に基づいて、上記第１及び第２の通信網のそれぞれの通信圏内に存在するか否かを検出する通信網検出ステップと、フェージングピッチ計測手段が、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段によって受信される電波に基づいて、フェージングピッチを計測するフェージングピッチ計測ステップと、待受け制御手段が、上記通信網検出手段による検出結果と、上記フェージングピッチ計測手段によって計測される上記フェージングピッチに基づいて、上記第１の受信手段と上記第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する待受け制御ステップとを備えることを特徴としている。
【０００７】
これらの本発明によれば、この移動通信端末は、所定の無線通信方式による第１の通信網から電波を受信する第１の受信手段と、上記第１の通信網より通信エリアが狭く、通信速度の速い無線通信方式による第２の通信網からの電波を受信する第２の受信手段とを備える。更に、この移動通信端末は、通信網検出手段とフェージングピッチ計測手段を備え、通信網検出手段が、第１及び第２の受信手段のそれぞれに受信される電波の受信強度に基づいて、第１及び第２の通信網のそれぞれの通信圏内に存在するか否かを検出する。また、フェージングピッチ計測手段が、第１及び第２の受信手段のうち、待受け動作中の受信手段によって受信される電波のフェージングピッチを計測する。そして、通信網検出手段による検出結果とフェージングピッチ計測手段によって計測されるフェージングピッチに基づいて、待受け制御手段が第１及び第２の受信手段それぞれの待受け動作のＯＮ／ＯＦＦを制御する。この「フェージングピッチ」とは、受信される電波の強度変化の周波数を意味し、一般に移動通信端末の移動速度が大きい場合にフェージングピッチは大きくなり、移動速度が小さくなるとフェージングピッチは小さくなる傾向がある。すなわち、本発明によれば、通信網検出手段によって検出される移動通信端末の存在位置における通信可能な通信網にかかわる情報と、フェージングピッチから予想される移動通信端末の移動速度とに基づく移動通信端末の移動状況に応じて、第１及び第２の通信網のうち、その移動状況に適した通信エリアをもつ無線通信方式を採用する通信網からの電波を待受けできるように、待受け制御手段が第１及び第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する。その結果、第１及び第２の受信手段のうち、その移動状況に適した受信手段の待受け動作をＯＮにして好適な通信を実現すると共に、その移動状況に適さない受信手段の待受け動作をＯＦＦにして、移動通信端末の消費電力を少なくできる。
【０００８】
また、本発明の移動通信端末においては、上記待受け制御手段は、上記フェージングピッチが所定の下限閾値より小さく、かつ、上記通信網検出手段による上記検出結果に基づいて上記第２の通信網の通信圏内に存在すると判断する場合に、上記第２の受信手段の待受け動作をＯＮにすることを特徴とすることが好適である。
【０００９】
また、本発明の待受け制御方法においては、上記待受け制御ステップにおいて、上記待受け制御手段は、上記フェージングピッチが所定の下限閾値より小さく、かつ、上記通信網検出手段による上記検出結果に基づいて上記第２の通信網の通信圏内に存在すると判断する場合に、上記第２の受信手段の待受け動作をＯＮにすることを特徴とすることが好適である。
【００１０】
これらの発明によれば、フェージングピッチが所定の下限閾値より小さく、かつ、第２の通信網の通信圏内に移動通信端末が存在すると判断する場合に、待受け制御手段が、第２の受信手段の待受け動作をＯＮにする。すなわち、移動通信端末が第２の通信網の通信エリアに存在し、その移動速度が小さいと予想される場合には、通信エリアの狭い第２の通信網の通信圏内から抜け出る可能性が少ないので、高速な通信速度による通信が実現できる第２の受信手段の待受け動作をＯＮにすることで、好適な通信が実現できる。
【００１１】
また、本発明の移動通信端末においては、上記待受け制御手段は、上記フェージングピッチが所定の上限閾値より大きい場合に、上記第１の受信手段の待受け動作をＯＮにすると共に、上記第２の受信手段の待受け動作をＯＦＦにすることを特徴とすることが好適である。
【００１２】
また、本発明の待受け制御方法においては、上記待受け制御ステップにおいて、上記待受け制御手段は、上記フェージングピッチが所定の上限閾値より大きい場合に、上記第１の受信手段の待受け動作をＯＮにすると共に、上記第２の受信手段の待受け動作をＯＦＦにすることを特徴とすることが好適である。
【００１３】
これらの発明によれば、フェージングピッチが所定の上限閾値より大きい場合、すなわち移動通信端末の移動速度が大きい場合に、第１の受信手段の待受け動作をＯＮにし、第２の受信手段の待受け動作をＯＦＦにする。すなわち、移動通信端末の高速な移動に対応できる通信エリアの広い第１の通信網からの電波を受信する第１の受信手段のみで待受けを行うので、移動通信端末の消費電力を少なくするとともに、その移動状況に応じた好適な通信を実現できる。
【００１４】
また、本発明の移動通信端末においては、上記待受け制御手段は、上記通信網検出手段による上記検出結果に基づいて、上記第１及び第２の通信網の通信圏外であると判断する場合に、上記第１及び第２の受信手段の待受け動作を所定時間ＯＦＦにすることを特徴とすることが好適である。
【００１５】
また、本発明の待受け制御方法においては、上記待受け制御ステップにおいて、上記待受け制御手段は、上記通信網検出手段による上記検出結果に基づいて、上記第１及び第２の通信網の通信圏外であると判断する場合に、上記第１及び第２の受信手段の待受け動作を所定時間ＯＦＦにすることが好適である。
【００１６】
これらの発明によれば、通信網検出手段による検出結果に基づいて、第１及び第２の通信網の双方に接続できないと判断する場合には、待受け制御手段が第１及び第２の受信手段の双方を所定時間停止させる。このようにして、いずれの通信網からの電波も受信できない場合に、この移動通信端末はその消費電量を少なくすることができる。
【００１７】
また、本発明の待受け制御プログラムは、所定の無線通信方式による第１の通信網からの電波を受信する第１の受信手段と、上記第１の通信網より通信エリアが狭く、通信速度の速い無線通信方式による第２の通信網からの電波を受信する第２の受信手段とを備える移動通信端末を、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段に受信される電波の受信強度に基づいて、上記第１及び第２の通信網のそれぞれの通信圏内に存在するか否かを検出する通信網検出手段と、上記第１及び第２の受信手段のうち、待受け動作中の上記受信手段によって受信される電波に基づいて、フェージングピッチを計測するフェージングピッチ計測手段と、上記通信網検出手段による検出結果と、上記フェージングピッチ計測手段によって計測される上記フェージングピッチに基づいて、上記第１の受信手段と上記第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する待受け制御手段として機能させる。
【００１８】
この発明によれば、この待受け制御プログラムが移動通信端末にインストールされると、待受け制御プログラムが移動通信端末を上記した通信網検出手段と、フェージングピッチ計測手段と、待受け制御手段として機能させる。すなわち、通信網検出手段によって検出される移動通信端末の存在位置における通信可能な通信網にかかわる情報と、フェージングピッチ計測手段によって計測されるフェージングピッチから予想される移動通信端末の移動速度とに基づく移動通信端末の移動状況に応じて、第１及び第２の通信網のうち、その移動状況に適した通信エリアをもつ無線通信方式を採用する通信網からの電波を待受けできるように、待受け制御手段が第１及び第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する。その結果、第１及び第２の受信手段のうち、その移動状況に適した受信手段の待受け動作をＯＮにして、好適な通信を実現するとともに、その移動状況に適さない受信手段の待受け動作をＯＦＦにして、移動通信端末の消費電力を少なくできる。
【００１９】
また、本発明の待受け制御プログラムにおいては、上記待受け制御手段は、上記フェージングピッチが所定の下限閾値より小さく、かつ、上記通信網検出手段による上記検出結果に基づいて上記第２の通信網の通信圏内に存在すると判断する場合に、上記第２の受信手段の待受け動作をＯＮにすることを特徴とすることが好適である。
【００２０】
この発明によれば、この待受け制御プログラムが移動通信端末に実現させる待受け制御手段が、フェージングピッチが所定の下限閾値より小さく、かつ、第２の通信網の通信圏内に移動通信端末が存在すると判断する場合に、第２の受信手段の待受け動作をＯＮにする。すなわち、移動通信端末が第２の通信網の通信エリアに存在し、その移動速度が小さいと予想される場合には、通信エリアの狭い第２の通信網の通信圏内から抜け出る可能性が少ないので、高速な通信速度による通信が実現できる第２の受信手段の待受け動作をＯＮにすることで、好適な通信が実現できる。
【００２１】
また、本発明の待受け制御プログラムにおいては、上記待受け制御手段は、上記フェージングピッチが所定の上限閾値より大きい場合に、上記第１の受信手段の待受け動作をＯＮにすると共に、上記第２の受信手段の待受け動作をＯＦＦにすることを特徴とすることが好適である。
【００２２】
この発明によれば、この待受け制御プログラムが移動通信端末に実現させる待受け制御手段が、フェージングピッチが所定の上限閾値より大きい場合、すなわち移動通信端末の移動速度が大きい場合に、第１の受信手段の待受け動作をＯＮにし、第２の受信手段の待受け動作をＯＦＦにする。すなわち、移動通信端末の高速な移動に対応できる通信エリアの広い第１の通信網からの電波を受信する第１の受信手段のみで待受けを行うので、移動通信端末の消費電力を少なくするとともに、好適な通信を実現できる。
【００２３】
また、本発明の待受け制御プログラムにおいては、上記待受け制御手段は、上記通信網検出手段による上記検出結果に基づいて、上記第１及び第２の通信網の通信圏外であると判断する場合に、上記第１及び第２の受信手段の待受け動作を所定時間ＯＦＦにすることを特徴とすることが好適である。
【００２４】
この発明によれば、この待受け制御プログラムが移動通信端末に実現させる通信網検出手段による検出結果に基づいて、第１及び第２の通信網の双方に接続できないと判断する場合には、待受け制御手段が、第１及び第２の受信手段の双方を所定時間停止させる。このようにして、いずれの通信網からの電波も受信できない場合に、この待受け制御プログラムによって、移動通信端末はその消費電量を少なくすることができる。
【００２５】
【発明の実施の形態】
本発明の実施形態にかかる移動通信端末１について添付の図面を参照して説明する。図１は移動通信端末１の機能的な構成を示すブロック図である。移動通信端末１は、携帯電話網（第１の通信網）と無線ＬＡＮ（第２の通信網）の双方の無線通信方式に対応しており、物理的には、ＣＰＵ（中央処理装置）、ボタン等の入力装置、ディスプレイ等の表示装置、メモリなどの記憶装置、携帯電話網及び無線ＬＡＮのそれぞれに対応するアンテナなどを備えている。
【００２６】
そして、移動通信端末１は機能的には図１に示すように、携帯電話網無線受信部（第１の受信手段）２と、無線ＬＡＮ無線受信部（第２の受信手段）３と、通信網検出部（通信網検出手段手段）４と、フェージングピッチ計測部（フェージングピッチ計測手段）５と、待受け制御部（待受け制御手段）６を備える。以下、これらの各構成要素について詳細に説明する。
【００２７】
携帯電話網無線受信部２は、ＩＴＵ（国際電気通信連合）によって標準化された第３世代移動通信方式のＩＭＴ−２０００に準拠したＷ−ＣＤＭＡ方式を採用する携帯電話網からの電波を受信する。すなわち、携帯電話網を構成する基地局からの電波を受信する。そして、後述する待受け制御部６による制御のもと、その待受け動作をＯＮにして携帯電話網からの電波を待受け、或いはその待受け動作をＯＦＦにして待受け状態を解除する。なお、この携帯電話網無線受信部２が対応する通信方式としては、第２世代のＰＤＣ（Ｐｅｒｓｏｎａｌ　Ｄｉｇｉｔａｌ　Ｃｅｌｌｕｌａｒ）方式といった移動体通信方式であってもよい。
【００２８】
無線ＬＡＮ無線受信部３は、無線ＬＡＮ（Ｌｏｃａｌ　Ａｒｅａ　Ｎｅｔｗｏｒｋ）からの電波を受信する。すなわち、無線ＬＡＮ構成するアクセスポイント等からの電波を受信する。そして、後述する待受け制御部６による制御のもと、その待受け動作をＯＮにして無線ＬＡＮからの電波を待受け、或いはその待受け動作をＯＦＦにして、待受け状態を解除する。
【００２９】
通信網検出部４は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれに受信される電波から、それぞれの電波の受信強度を計測する。そして、携帯電話網無線受信部２によって受信される電波の受信強度が一定の強度以上である場合には、移動通信端末１が携帯電話網への通信圏内にあると判断する。また、無線ＬＡＮ無線受信部３によって受信される電波の受信強度が一定の強度以上である場合には、移動通信端末１が無線ＬＡＮへの通信圏内にあると判断する。
そして、移動通信端末１が携帯電話網及び無線ＬＡＮの通信圏内に存在するか否かに関する通信網検出情報を生成する。
【００３０】
フェージングピッチ計測部５は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって受信される電波のフェージングピッチを計測する。なお、この「フェージングピッチ」とは、受信される電波の強度変化の周波数を意味し、一般に移動通信端末の移動速度が大きい場合にフェージングピッチは大きくなり、移動速度が小さくなるとフェージングピッチは小さくなる傾向がある。そして、このフェージングピッチには、例えば、上記の電波の波形の包絡線を求めて、その包絡線の中心周波数を用いることができる。また、上記の電波（電波の直流成分や信号成分を除いたもの）の、ピーク周波数なども用いることができる。
【００３１】
待受け制御部６は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の待受け動作のＯＮ／ＯＦＦを制御する。すなわち、上述した通信網検出部４によって生成される通信網検出情報やフェージングピッチ計測部５によって計測されるフェージングピッチに基づいて、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３をそれぞれ待受け動作をＯＮして待受け状態としたり、或いは待受け動作をＯＦＦにして待受け状態を解除する。なお、この待受け制御方法の詳細なについては後述する。
【００３２】
続いて、本実施形態にかかる移動通信端末１の動作について説明し、併せて本実施形態にかかる移動通信端末１の待受け制御方法について説明する。図２〜５は、本実施形態にかかる移動通信端末１の待受け制御方法のフローチャートである。
【００３３】
まず、図２に示すように、移動通信端末１に備える通信網検出部４が、携帯電話網無線受信部２によって受信される電波と無線ＬＡＮ無線受信部３によって受信される電波のそれぞれの受信強度を計測する。そして、携帯電話網無線受信部２によって受信される電波の受信強度が一定の強度以上の場合、携帯電話網の通信圏内であると判断し、無線ＬＡＮ無線受信部３によって受信される電波の受信強度が一定の強度以上の場合に無線ＬＡＮの通信圏内であると判断し、これらの判断結果に関する通信網検出情報を生成する（ステップＳ１）。
【００３４】
次に、待受け制御部６は、通信網検出部４によって生成される通信網検出情報から、移動通信端末１の存在位置において、どの通信網から電波を受信できるかを判断し（ステップＳ２〜Ｓ４）、その判断によって以下の異なる処理をそれぞれを行う。まず、移動通信端末１が携帯電話網のみから電波を受信可能であるか否かを判断する（ステップＳ２）。そして移動通信端末１が携帯電話網のみから電波を受信可能であると判断する場合には、図３に示すフローチャートの処理を行う。このとき、図３に示すように、まず、待受け制御部６は、携帯電話網無線受信部２の待受け動作をＯＮにし、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにする。すなわち、携帯電話網無線受信部２のみを待受け状態とする（ステップＳ１０１）。
【００３５】
次いで、フェージングピッチ計測部５が、このとき待受け動作中の携帯電話網無線受信部２によって受信される電波のフェージングピッチを計測する（ステップＳ１０２）。そして、フェージングピッチ計測部５によって計測されるフェージングピッチをｆ［Ｈｚ］とし、フェージングピッチの上限閾値ｆｍａｘ［Ｈｚ］、フェージングピッチの下限閾値をｆｍｉｎ［Ｈｚ］とすると、ｆがｆｍｉｎより小さいか、またはｆがｆｍａｘより大きいか否かを判断する（ステップＳ１０３）。そしてｆがｆｍｉｎより小さい場合、またはｆがｆｍａｘより大きい場合に、携帯電話網無線受信部２を待受け動作をＯＮにし、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにする現在の状態を継続させる。すなわちｆがｆｍｉｎより小さい場合は、移動通信端末１が殆ど移動していないと予想されるので、携帯電話網無線受信部２のみによって電波を待受ける現在の状態を継続する。また、ｆがｆｍａｘより大きい場合は、移動通信端末１が高速に移動していると予想されるので、無線ＬＡＮより通信エリアの広い携帯電話網からの電波を受信する携帯電話網無線受信部２のみによって電波を待受ける現在の状態を継続する。
【００３６】
一方、ｆがｆｍｉｎより小さいか、またはｆがｆｍａｘより大きいか否かを判断して（ステップＳ１０３）、この条件を満たさない場合、すなわちｆがｆｍｉｎ以上かつｆｍａｘ以下の場合に、携帯電話網無線受信部２の待受け動作をＯＮにした現在の状態を維持すると共に、無線ＬＡＮ無線受信部３の待受け動作もＯＮにする（ステップＳ１０４）。すなわち、移動通信端末１は移動しているものの、その速度が大きくない場合は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の両者で電波を待受ける。
【００３７】
次に、通信網検出部４が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部に受信される電波の受信強度から、携帯電話網、無線ＬＡＮそれぞれから電波を受信可能か否か検出し、携帯電話網、無線ＬＡＮそれぞれの通信圏内に存在するか否かに関する通信網検出情報を生成する（ステップＳ１０５）。この通信網検出情報は、上記のように携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって一定の強度以上の電波が受信されると、その受信部の対応する通信網の通信圏内であるとして生成される。一方、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれの待受け動作がＯＦＦの場合には、対応する通信網の通信圏外であるとして生成される。
【００３８】
そして、待受け制御部６は、通信網検出部４によって生成される通信網検出情報から、移動通信端末１の存在位置において、どの通信網から電波を受信できるかを判断し（ステップＳ１０６〜Ｓ１０８）、その判断によって以下の異なる処理をそれぞれ行う。まず、携帯電話網のみから電波を受信できるか否かを判断する（ステップＳ１０６）。そして、携帯電話網のみから電波を受信できる場合には、図３のフローチャートに示す処理を繰り返す。また、無線ＬＡＮのみから電波を受信できると判断するか否かを判断し（ステップＳ１０７）、無線ＬＡＮのみから電波を受信できる場合には、図４のフローチャートに示す処理を行う。また、携帯電話網と無線ＬＡＮ網の両者から電波を受信できるか否かを判断し（ステップＳ１０８）、携帯電話網と無線ＬＡＮ網の両者から電波を受信できる場合には、図５のフローチャートに示す処理を行う。一方、携帯電話網と無線ＬＡＮ網の両者から電波を受信できないと判断する場合には、図６のフローチャートに示す処理を行う。
【００３９】
図２に戻って、移動通信端末１が無線ＬＡＮのみから電波を受信可能であるか否かを判断する（ステップＳ３）。そして、移動通信端末１が無線ＬＡＮのみから電波を受信可能な場合には、図４に示すフローチャートの処理を行う。このとき、図４に示すように、まず、待受け制御部６は、無線ＬＡＮ無線受信部３の待受け動作をＯＮにし、携帯電話網無線受信部２の待受け動作をＯＦＦにする。すなわち、無線ＬＡＮ無線受信部３のみを待受け状態とする（ステップＳ２０１）。
【００４０】
次いで、フェージングピッチ計測部５が、このとき待受け動作中の無線ＬＡＮ無線受信部３によって受信される電波のフェージングピッチを計測する（ステップＳ２０２）。そして、フェージングピッチ計測部５によって計測されるフェージングピッチをｆ［Ｈｚ］とし、フェージングピッチの上限閾値ｆｍａｘ［Ｈｚ］、フェージングピッチの下限閾値をｆｍｉｎ［Ｈｚ］とすると、ｆがｆｍａｘより大きいか否かを判断する（ステップＳ２０３）。そしてｆがｆｍａｘより大きい場合は、携帯電話網無線受信部２の待受け動作をＯＮにし、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにする（ステップＳ２０４）。すなわち、ｆがｆｍａｘより大きい場合は、移動通信端末１が高速に移動していると予想されるので、無線ＬＡＮより通信エリアの広い携帯電話網からの電波を受信する携帯電話網無線受信部２のみによって電波を待受ける。
【００４１】
また、ｆがｆｍｉｎ以上かつｆｍａｘ以下であるか否かを判断し（ステップＳ２０５）、この条件を満たす場合に、無線ＬＡＮ無線受信部３の待受け動作をＯＮにしている現在の状態を維持すると共に、携帯電話網無線受信部２の待受け動作をＯＮにする（ステップＳ２０６）。すなわち、移動通信端末１は移動しているものの、その速度が大きくない場合は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の両者で電波を待受ける。
【００４２】
また、ｆがｆｍｉｎ以上かつｆｍａｘ以下であるか否かを判断し（ステップＳ２０５）、この条件を満たさない場合、すなわち、ｆがｆｍｉｎより小さい場合は、移動通信端末１は殆ど移動していないと予想されるので、携帯電話網無線受信部２の待受け動作をＯＦＦにし、無線ＬＡＮ無線受信部３の待受け動作をＯＮにして、無線ＬＡＮからの電波を待受ける現在の状態を継続する。
【００４３】
次に、通信網検出部４が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部に受信される電波の受信強度から、携帯電話網、無線ＬＡＮそれぞれから電波を受信可能か否か検出し、携帯電話網、無線ＬＡＮそれぞれの通信圏内に存在するか否かに関する通信網検出情報を生成する（ステップＳ２０７）。この通信網検出情報は、上記のように携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって一定の強度以上の電波が受信されると、その受信部の対応する通信網の通信圏内であるとして生成される。一方、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれの待受け動作がＯＦＦの場合には、対応する通信網の通信圏外であるとして生成される。
【００４４】
そして、待受け制御部６は、通信網検出部４によって生成される通信網検出情報から、移動通信端末１の存在位置において、どの通信網から電波を受信できるかを判断し（ステップＳ２０８〜Ｓ２１０）、その判断によって以下の異なる処理をそれぞれ行う。まず、携帯電話網のみから電波を受信できるか否かを判断し（ステップＳ２０８）、携帯電話網のみから電波を受信できる場合には、図３のフローチャートに示す処理を行う。また、無線ＬＡＮのみから電波を受信できるか否かを判断し（ステップＳ２０９）、無線ＬＡＮのみから電波を受信できる場合には、図４のフローチャートに示す処理を繰り返す。また、携帯電話網と無線ＬＡＮ網の両者から電波を受信できるか判断し（ステップＳ２１０）、この条件を満たす場合には、図５のフローチャートに示す処理を行う。一方、この条件を満たさない場合、すなわち、携帯電話網と無線ＬＡＮ網の両者から電波を受信できない場合には、図６のフローチャートに示す処理を行う。
【００４５】
図２に戻って、移動通信端末１が携帯電話網及び無線ＬＡＮの両者から電波を受信可能であるか否かを判断する（ステップＳ４）。そして、移動通信端末１が携帯電話網及び無線ＬＡＮの両者から電波を受信可能である場合には、図５に示すフローチャートの処理を行う。このとき、図５に示すように、まず、待受け制御部６は、無線ＬＡＮ無線受信部３の待受け動作をＯＮにし、携帯電話網無線受信部２の待受け動作をＯＦＦにする。すなわち、携帯電話網及び無線ＬＡＮの両者から電波を受信可能であると判断する場合には、より高速な通信速度によって通信が可能な、無線ＬＡＮ無線受信部３のみを待受け状態とする（ステップＳ３０１）。
【００４６】
次いで、フェージングピッチ計測部５が、このとき待受け動作中の無線ＬＡＮ無線受信部３によって受信される電波のフェージングピッチを計測する（ステップＳ３０２）。そして、フェージングピッチ計測部５によって計測されるフェージングピッチをｆ［Ｈｚ］とし、フェージングピッチの上限閾値ｆｍａｘ［Ｈｚ］、フェージングピッチの下限閾値をｆｍｉｎ［Ｈｚ］とすると、ｆがｆｍａｘより大きいか否かを判断する（ステップＳ３０３）。そしてｆがｆｍａｘより大きい場合は、携帯電話網無線受信部２の待受け動作をＯＮにし、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにする（ステップＳ３０４）。すなわち、ｆがｆｍａｘより大きい場合は、移動通信端末１が高速に速度で移動していると予想されるので、無線ＬＡＮより通信エリアの広い携帯電話網からの電波を受信する携帯電話網無線受信部２のみによって電波を待受ける。
【００４７】
また、ｆがｆｍｉｎ以上かつｆｍａｘ以下であるかを判断する（ステップＳ３０５）。そして、ｆがｆｍｉｎ以上かつｆｍａｘ以下である場合に、無線ＬＡＮ無線受信部３の待受け動作をＯＮにした現在の状態を維持するとともに、携帯電話網無線受信部２の待受け動作をＯＮにする（ステップＳ３０６）。すなわち、移動通信端末１は移動しているものの、その速度が大きくない場合は、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の両者で電波を待受ける。
【００４８】
また、ｆがｆｍｉｎ以上かつｆｍａｘ以下であるかを判断して（ステップＳ３０５）、この条件を満たさない場合、すなわち、ｆがｆｍｉｎより小さい場合は、移動通信端末１は殆ど移動していないと予想されるので、携帯電話網無線受信部２の待受け動作をＯＦＦにし、無線ＬＡＮ無線受信部３の待受け動作をＯＮにして、無線ＬＡＮからの電波を待受ける現在の状態を継続する。
【００４９】
次に、通信網検出部４が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部に受信される電波の受信強度から、携帯電話網、無線ＬＡＮそれぞれから電波を受信可能か否か検出し、携帯電話網、無線ＬＡＮそれぞれの通信圏内に存在するか否かに関する通信網検出情報を生成する（ステップＳ３０７）。この通信網検出情報は、上記のように携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって一定の強度以上の電波が受信されると、その受信部の対応する通信網の通信圏内であるとして生成される。一方、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれの待受け動作がＯＦＦの場合には、対応する通信網の通信圏外であるとして生成される。
【００５０】
そして、待受け制御部６は、通信網検出部４によって生成される通信網検出情報から、移動通信端末１の存在位置において、どの通信網から電波を受信できるかを判断し（ステップＳ３０８〜Ｓ３１０）、その判断によって以下の異なる処理をそれぞれを行う。まず、携帯電話網のみから電波を受信できるか否かを判断する（ステップＳ３０８）。そして携帯電話網のみから電波を受信できる場合には、図３のフローチャートに示す処理を行う。また、無線ＬＡＮのみから電波を受信できるか否かを判断し（ステップＳ３０９）、無線ＬＡＮのみから電波を受信できる場合には、図４のフローチャートに示す処理を行う。また、携帯電話網と無線ＬＡＮ網の両者から電波を受信できるか否かを判断し（ステップＳ３１０）、この条件を満たす場合には、図５のフローチャートに示す処理を繰り返す。一方、この条件を満たさない場合、すなわち、携帯電話網と無線ＬＡＮ網の両者から電波を受信できない場合には、図６のフローチャートに示す処理を行う。
【００５１】
図２に戻って、移動通信端末１が携帯電話網及び無線ＬＡＮの両者から電波を受信できるか否かを判断し（ステップＳ４）、この条件を満たさない場合、すなわち、移動通信端末１が携帯電話網及び無線ＬＡＮの両者から電波を受信できない場合には、図６に示すフローチャートの処理を行う。このとき、図６に示すように、まず、待受け制御部６は、携帯電話網無線受信部２、無線ＬＡＮ無線受信部３の両者の待受け動作を所定時間ＯＦＦにする（ステップＳ４０１）。そして、待受け制御部６は、所定時間経過後に、携帯電話網無線受信部２、無線ＬＡＮ無線受信部３の両者の待受け動作をＯＮにする（ステップＳ４０２）。
【００５２】
次に、通信網検出部４が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれに受信される電波の受信強度から、携帯電話網、無線ＬＡＮそれぞれから電波を受信可能か否か検出し、携帯電話網、無線ＬＡＮそれぞれの通信圏内に存在するか否かに関する通信網検出情報を生成する（ステップＳ４０３）。
【００５３】
そして、待受け制御部６は、通信網検出部４によって生成される通信網検出情報から、移動通信端末１の存在位置において、どの通信網から電波を受信できるかを判断し（ステップＳ４０４〜Ｓ４０６）、その判断によって以下の異なる処理をそれぞれ行う。まず、携帯電話網のみから電波を受信できるか否かを判断する（ステップＳ４０４）。そして、携帯電話網のみから電波を受信できる場合には、図３のフローチャートに示す処理を行う。また、無線ＬＡＮのみから電波を受信できるか否かを判断する（ステップＳ４０５）。そして、無線ＬＡＮのみから電波を受信できる場合には、図４のフローチャートに示す処理を行う。また、携帯電話網と無線ＬＡＮ網の両者から電波を受信できるか否かを判断し（ステップＳ４０６）、この条件を満たす場合には、図５のフローチャートに示す処理を行う。一方、この条件を満たさない場合、すなわち、携帯電話網と無線ＬＡＮ網の両者から電波を受信できないと判断する場合には、図６のフローチャートに示す処理を繰り返す。
【００５４】
続いて、実施形態にかかる待受け制御プログラム１００について説明する。図７は待受け制御プログラム１００のモジュール構成を示すブロック図である。図７に示すように、本実施形態の待受け制御プログラム１００は、メインモジュール１０１、通信網検出モジュール１０２、フェージングピッチ計測モジュール１０３、待受け制御モジュール１０４を備える。このメインモジュール１０１は、処理を統括するモジュールであり、通信網検出モジュール１０２、フェージングピッチ計測モジュール１０３、待受け制御モジュール１０４はそれぞれ、通信網検出部４、フェージングピッチ計測部５、待受け制御部６の機能を移動通信端末１に実現させる。したがって、待受け制御プログラム１００のインストーラを管理するサーバから、この待受け制御プログラム１００のインストーラが移動通信端末１にダウンロードされて、待受け制御プログラム１００が移動通信端末１にインストールされると、上述した待受け制御を移動通信端末１に実現させる。
【００５５】
以下、本実施形態にかかる移動通信端末１の作用及び効果を説明する。ます、通信網検出部４が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって受信される電波の受信強度に基づいて、携帯電話網及び無線ＬＡＮそれぞれの通信圏内であるか否かに関する通信網検出情報を生成する。また、フェージングピッチ計測部５が、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、待受け動作中の受信部によって受信される電波のフェージングピッチを計測する。このフェージングピッチと通信網検出情報に基づいて、待受け制御部６が携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のそれぞれの待受け動作を制御する。ここで、フェージングピッチは一般に移動通信端末１の移動速度と比例する傾向を示す。したがって、通信網検出情報とフェージングピッチから予想される移動通信端末１の移動速度に基づいた移動通信端末１の移動状況に応じて、携帯電話網及び無線ＬＡＮのうち、その移動状況に適した無線通信方式を採用する通信網からの電波を待受けできるように、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の待受け動作のＯＮ／ＯＦＦを制御する。その結果、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３のうち、その移動状況に適さない受信部の待受け動作をＯＦＦにすることにより、移動通信端末１の消費電力を少なくできるとともに、その移動状況に適した受信部の待受け動作をＯＮにすることで好適な通信が実現できる。例えば、フェージングピッチが大きい場合は、移動通信端末１の速度が大きいと予想されるので、移動速度が大きい場合に適する通信エリアの広い携帯電話網から電波を受信できる携帯電話網無線受信部２のみの待受け動作をＯＮにして好適な通信を実現するとともに、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにすることにより、移動通信端末１の消費電力を低減する。一方、フェージングピッチが小さいため移動通信端末１の移動速度が小さいと予想され、かつ通信網検出情報から無線ＬＡＮの通信圏内に存在すると判断される場合には、待受け制御部６が無線ＬＡＮ無線受信部３の待受け動作をＯＮにする。すなわち、通信網圏検出情報から移動通信端末１が無線ＬＡＮの通信圏内にあると判断され、フェージングピッチから移動通信端末１は殆ど移動しないと判断される場合には、高速な通信速度で通信できる無線ＬＡＮ無線受信部３の待受け動作をＯＮにして、好適な通信を実現する。また、待受け制御部６は、通信網検出部４によって生成される通信網検出情報に基づいて、携帯電話網と無線ＬＡＮの両者から電波を受信できないと判断する場合には、携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３の両者の待受け動作を所定時間ＯＦＦにする。これにより、移動通信端末１は、その消費電量を少なくするとともに、所定時間経過後に携帯電話網無線受信部２及び無線ＬＡＮ無線受信部３で電波を受信できるか否かについて再度確認できる。
【００５６】
なお、本発明は上記した本実施形態に限定されることなく種々の変形が可能である。まず、本実施携帯に示した技術は、携帯電話網と無線ＬＡＮとのように、通信エリアと通信速度の異なる二つの無線通信方式を採用する移動通信端末に適用可能である。したがって、例えば、無線ＬＡＮ無線受信部３に代えて、Ｂｌｕｅｔｏｏｔｈなどの近距離無線から電波を受信する受信部を適用することができる。
【００５７】
また、上記したように、フェージングピッチ計測部５によって計測されるフェージングピッチに対して適用する上限閾値（ｆｍａｘ）や下限閾値（ｆｍａｘ）は、携帯電話網無線受信部２によって受信される電波から計測するフェージングピッチと、無線ＬＡＮ無線受信部３によって受信される電波から計測するフェージングピッチとで、異なる値を適用しても良い。
【００５８】
また、図４に示すフローチャートの処理、すなわち、移動通信端末１が携帯電話網、無線ＬＡＮの両者から電波を受信できる場合の処理においては、携帯電話網無線受信部２の待受け動作をＯＦＦにし、無線ＬＡＮ無線受信部３によって電波の待受けを行っている（ステップＳ３０１）が、この設定は、ユーザによる変更を妨げるものではない。例えばユーザが携帯電話網からの電波を受信することを優先させたいい場合には、携帯電話網無線受信部２の待受け動作をＯＮにし、無線ＬＡＮ無線受信部３の待受け動作をＯＦＦにするように、変更することも可能である。
【００５９】
【発明の効果】
本発明によれば、通信網検出手段によって検出される第１及び第２の通信網の通信圏内であるか否かに関する検出結果と、フェージングピッチ計測手段によって計測されるフェージングピッチとに基づいて、待受け制御手段が第１及び第２の受信手段のそれぞれの待受け動作のＯＮ／ＯＦＦを制御する。その結果、第１及び第２の受信手段のうち、移動通信端末の移動状況に適した受信手段の待受け動作をＯＮにして好適な通信を実現するとともに、移動通信端末の移動状況に適さない受信手段の待受け動作を停止させて、移動通信端末の消費電力を少なくできる。
【図面の簡単な説明】
【図１】実施形態にかかる移動通信端末の機能的な構成を示すブロック図である。
【図２】実施形態にかかる待受け制御方法のフローチャートである。
【図３】実施形態にかかる待受け制御方法のフローチャートである。
【図４】実施形態にかかる待受け制御方法のフローチャートである。
【図５】実施形態にかかる待受け制御方法のフローチャートである。
【図６】実施形態にかかる待受け制御方法のフローチャートである。
【図７】実施形態にかかる待受け制御プログラムの構成を示すブロック図である。
【符号の説明】
１…移動通信端末、２…携帯電話網無線受信部、３…無線ＬＡＮ無線受信部、４…通信網検出部、５…フェージングピッチ計測部、６…待受け制御部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a mobile communication terminal.
[0002]
[Prior art]
In recent years, mobile communication terminals capable of performing communication using two different communication networks such as a mobile phone network and a wireless LAN network have become widespread. Such a mobile communication terminal is provided with two wireless receiving units for receiving radio waves from two different communication networks, respectively.
[0003]
[Problems to be solved by the invention]
As described above, in a conventional mobile communication terminal having two wireless receiving units, in order to realize a preferable communication even when the moving state changes, the standby operation of each wireless receiving unit is always set to ON. Need to be kept. As a result, there is a problem that much power is consumed.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of such a problem. Even if two wireless receiving units are provided, the mobile communication system can achieve low power consumption and can realize suitable communication in response to a change in a moving situation. Provide a terminal.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, a mobile communication terminal according to the present invention has a first receiving unit for receiving a radio wave from a first communication network using a predetermined wireless communication method, and a communication area smaller than that of the first communication network. And a second receiving means for receiving a radio wave from a second communication network using a high-speed wireless communication method, wherein the first and second receiving means are in a standby operation. Communication network detection means for detecting whether or not the radio wave is present in the respective communication areas of the first and second communication networks based on the reception intensity of the radio wave received by the reception means; A fading pitch measuring means for measuring a fading pitch based on a radio wave received by the receiving means in a standby operation, a detection result by the communication network detecting means, Based on the fading pitch measured by the measuring means, characterized by comprising a standby control means for controlling ON / OFF of each of the standby operation of the first receiving means and said second receiving means.
[0006]
According to another aspect of the present invention, there is provided a standby control method, comprising: a first receiving unit for receiving a radio wave from a first communication network using a predetermined wireless communication method; and a communication area from the first communication network. And a second receiving means for receiving a radio wave from a second communication network using a wireless communication system having a high communication speed, wherein the communication network detecting means comprises: And detecting whether or not each of the first and second communication networks is within the communication range of each of the first and second communication networks based on the reception intensity of the radio wave received by the receiving means in a standby operation among the second receiving means. And a fading pitch measuring means for measuring a fading pitch based on a radio wave received by the receiving means during standby operation among the first and second receiving means. The first receiving means and the second receiving means based on the detection result by the communication network detecting means and the fading pitch measured by the fading pitch measuring means. And a standby control step of controlling ON / OFF of each standby operation.
[0007]
According to the present invention, the mobile communication terminal is provided with first receiving means for receiving a radio wave from a first communication network using a predetermined wireless communication method, and a communication area smaller than that of the first communication network. Second receiving means for receiving radio waves from a second communication network using a high-speed wireless communication system. Further, the mobile communication terminal includes a communication network detecting means and a fading pitch measuring means, wherein the communication network detecting means detects the first and second fading pitches based on the reception intensity of the radio wave received by each of the first and second receiving means. And whether or not they are within the respective communication areas of the second communication network. Further, the fading pitch measuring means measures the fading pitch of the radio wave received by the receiving means in the standby operation among the first and second receiving means. Then, the standby control unit controls ON / OFF of the standby operation of each of the first and second receiving units based on the detection result by the communication network detecting unit and the fading pitch measured by the fading pitch measuring unit. This “fading pitch” means a frequency of a change in the intensity of a received radio wave. Generally, the fading pitch increases when the moving speed of the mobile communication terminal is high, and the fading pitch tends to decrease when the moving speed decreases. is there. That is, according to the present invention, a mobile communication based on information relating to a communicable communication network at the location of the mobile communication terminal detected by the communication network detecting means and a moving speed of the mobile communication terminal predicted from the fading pitch In accordance with the movement state of the terminal, the standby control means is configured to wait for a radio wave from a communication network adopting a wireless communication method having a communication area suitable for the movement state among the first and second communication networks. ON / OFF of the standby operation of each of the first and second receiving units is controlled. As a result, of the first and second receiving means, the standby operation of the receiving means suitable for the moving condition is turned ON to realize a suitable communication, and the standby operation of the receiving means not suitable for the moving condition is turned OFF. Thus, the power consumption of the mobile communication terminal can be reduced.
[0008]
Also, in the mobile communication terminal of the present invention, the standby control means may be configured to control the communication of the second communication network based on the result of the detection by the communication network detecting means, wherein the fading pitch is smaller than a predetermined lower threshold. It is preferable that the standby operation of the second receiving means is turned on when it is determined that the mobile terminal is present in the area.
[0009]
Further, in the standby control method of the present invention, in the standby control step, the standby control means is configured to determine that the fading pitch is smaller than a predetermined lower threshold and based on the detection result by the communication network detection means. It is preferable that the standby operation of the second receiving means is turned on when it is determined that the second receiving means is within the communication range of the second communication network.
[0010]
According to these inventions, when it is determined that the fading pitch is smaller than the predetermined lower limit threshold and that the mobile communication terminal exists within the communication range of the second communication network, the standby control means Turn on the standby operation. That is, when the mobile communication terminal is in the communication area of the second communication network and its moving speed is expected to be low, there is little possibility that the mobile communication terminal will escape from the communication area of the second communication network having a narrow communication area. By turning on the standby operation of the second receiving means capable of realizing communication at a high communication speed, suitable communication can be realized.
[0011]
Further, in the mobile communication terminal according to the present invention, when the fading pitch is larger than a predetermined upper threshold value, the standby control unit turns on the standby operation of the first receiving unit and sets the second reception mode. It is preferable that the standby operation of the means is turned off.
[0012]
In the standby control method of the present invention, in the standby control step, the standby control unit turns on the standby operation of the first receiving unit when the fading pitch is larger than a predetermined upper limit threshold value. Preferably, the standby operation of the second receiving means is turned off.
[0013]
According to these inventions, when the fading pitch is larger than the predetermined upper threshold, that is, when the moving speed of the mobile communication terminal is high, the standby operation of the first receiving unit is turned on, and the standby operation of the second receiving unit is turned on. To OFF. That is, since the standby is performed only by the first receiving unit that receives the radio wave from the first communication network having a wide communication area capable of coping with the high-speed movement of the mobile communication terminal, the power consumption of the mobile communication terminal can be reduced. Suitable communication according to the moving situation can be realized.
[0014]
Further, in the mobile communication terminal of the present invention, the standby control unit, based on the detection result by the communication network detection unit, determines that the communication network is out of the communication range of the first and second communication networks, It is preferable that the standby operation of the first and second receiving units is turned off for a predetermined time.
[0015]
In the standby control method according to the present invention, in the standby control step, the standby control unit is out of the communication range of the first and second communication networks based on the detection result by the communication network detection unit. When it is determined that the waiting operation of the first and second receiving means is turned off for a predetermined time, it is preferable.
[0016]
According to these inventions, when it is determined based on the detection result by the communication network detecting means that it is not possible to connect to both the first and second communication networks, the standby control means sets the first and second receiving means. Are stopped for a predetermined time. In this way, when radio waves from any communication network cannot be received, this mobile communication terminal can reduce its power consumption.
[0017]
Further, the standby control program according to the present invention includes a first receiving means for receiving a radio wave from a first communication network using a predetermined wireless communication method, a communication area smaller than the first communication network, and a higher communication speed. A mobile communication terminal comprising: a second receiving means for receiving a radio wave from a second communication network by a wireless communication system, wherein the mobile communication terminal is received by the receiving means in a standby operation among the first and second receiving means. Communication network detection means for detecting whether or not the radio wave is present in the respective communication areas of the first and second communication networks based on the reception intensity of the radio wave, and among the first and second reception means, On the basis of the radio wave received by the receiving unit in the standby operation, a fading pitch measuring unit that measures a fading pitch, a detection result by the communication network detecting unit, and the fading pitch measuring unit Based on the fading pitch is measured, to function as a standby control means for controlling ON / OFF of each of the standby operation of the first receiving means and said second receiving means.
[0018]
According to the present invention, when the standby control program is installed in the mobile communication terminal, the standby control program causes the mobile communication terminal to function as the above-described communication network detection unit, fading pitch measurement unit, and standby control unit. That is, it is based on information relating to a communicable communication network at the location of the mobile communication terminal detected by the communication network detection means and the moving speed of the mobile communication terminal estimated from the fading pitch measured by the fading pitch measuring means. In accordance with the moving state of the mobile communication terminal, standby control is performed so that radio waves from a communication network adopting a wireless communication method having a communication area suitable for the moving state can be received from the first and second communication networks. The means controls ON / OFF of each standby operation of the first and second receiving means. As a result, of the first and second receiving means, the standby operation of the receiving means suitable for the moving condition is turned ON to realize suitable communication and the standby operation of the receiving means not suitable for the moving condition is performed. By turning OFF, the power consumption of the mobile communication terminal can be reduced.
[0019]
Further, in the standby control program according to the present invention, the standby control means may be configured such that the fading pitch is smaller than a predetermined lower limit threshold value and the communication of the second communication network is performed based on the detection result by the communication network detection means. It is preferable that the standby operation of the second receiving means is turned on when it is determined that the mobile terminal is present in the area.
[0020]
According to the present invention, the standby control means realized by the mobile communication terminal by the standby control program determines that the fading pitch is smaller than the predetermined lower threshold and that the mobile communication terminal exists within the communication range of the second communication network. In this case, the standby operation of the second receiving means is turned ON. That is, when the mobile communication terminal is in the communication area of the second communication network and its moving speed is expected to be low, there is little possibility that the mobile communication terminal will escape from the communication area of the second communication network having a narrow communication area. By turning on the standby operation of the second receiving means capable of realizing communication at a high communication speed, suitable communication can be realized.
[0021]
In the standby control program according to the present invention, when the fading pitch is larger than a predetermined upper threshold, the standby control means turns on the standby operation of the first receiving means and sets the second reception It is preferable that the standby operation of the means is turned off.
[0022]
According to the present invention, when the standby control means causes the mobile communication terminal to realize the standby control means, if the fading pitch is larger than the predetermined upper limit threshold, that is, if the moving speed of the mobile communication terminal is high, the first reception means Is turned on, and the standby operation of the second receiving means is turned off. That is, since the standby is performed only by the first receiving unit that receives the radio wave from the first communication network having a wide communication area capable of coping with the high-speed movement of the mobile communication terminal, the power consumption of the mobile communication terminal can be reduced. Suitable communication can be realized.
[0023]
In the standby control program according to the present invention, the standby control means determines that the mobile communication terminal is out of the communication range of the first and second communication networks based on the detection result by the communication network detection means. It is preferable that the standby operation of the first and second receiving units is turned off for a predetermined time.
[0024]
According to the present invention, when the standby control program determines that it is not possible to connect to both the first and second communication networks based on the detection result by the communication network detecting means realized by the mobile communication terminal, The means stops both the first and second receiving means for a predetermined time. In this way, when radio waves from any of the communication networks cannot be received, the standby control program allows the mobile communication terminal to reduce its power consumption.
[0025]
BEST MODE FOR CARRYING OUT THE INVENTION
A mobile communication terminal 1 according to an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing a functional configuration of the mobile communication terminal 1. The mobile communication terminal 1 supports both wireless communication systems of a mobile phone network (first communication network) and a wireless LAN (second communication network), and physically includes a CPU (central processing unit), An input device such as a button, a display device such as a display, a storage device such as a memory, an antenna corresponding to each of a mobile phone network and a wireless LAN, and the like are provided.
[0026]
As shown in FIG. 1, the mobile communication terminal 1 communicates with a mobile phone network wireless receiving unit (first receiving unit) 2, a wireless LAN wireless receiving unit (second receiving unit) 3, and A network detection unit (communication network detection means), a fading pitch measurement unit (fading pitch measurement means) 5, and a standby control unit (standby control means) 6 are provided. Hereinafter, each of these components will be described in detail.
[0027]
The mobile phone network wireless receiving unit 2 receives radio waves from a mobile phone network adopting the W-CDMA system compliant with IMT-2000 of the third generation mobile communication system standardized by the ITU (International Telecommunication Union). That is, it receives radio waves from base stations that make up the mobile phone network. Then, under the control of the standby control unit 6, which will be described later, the standby operation is turned ON to wait for a radio wave from the mobile phone network, or the standby operation is turned OFF to release the standby state. The communication system supported by the mobile phone network wireless receiving unit 2 may be a mobile communication system such as a second generation PDC (Personal Digital Cellular) system.
[0028]
The wireless LAN wireless receiving unit 3 receives radio waves from a wireless LAN (Local Area Network). That is, it receives radio waves from access points and the like constituting a wireless LAN. Then, under the control of the standby control unit 6, which will be described later, the standby operation is turned on to wait for a radio wave from the wireless LAN, or the standby operation is turned off, and the standby state is released.
[0029]
The communication network detection unit 4 measures the reception intensity of each radio wave from the radio waves received by each of the mobile telephone network wireless reception unit 2 and the wireless LAN wireless reception unit 3. If the reception intensity of the radio wave received by the mobile phone network wireless receiving unit 2 is equal to or higher than a certain level, it is determined that the mobile communication terminal 1 is within the communication range to the mobile phone network. Further, when the reception intensity of the radio wave received by the wireless LAN wireless reception unit 3 is equal to or higher than a certain intensity, it is determined that the mobile communication terminal 1 is within the communication range to the wireless LAN.
Then, it generates communication network detection information on whether or not the mobile communication terminal 1 exists within the communication area of the mobile phone network and the wireless LAN.
[0030]
The fading pitch measuring unit 5 measures a fading pitch of a radio wave received by the receiving unit in the standby operation among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3. In addition, this "fading pitch" means the frequency of the intensity change of the received radio wave. Generally, when the moving speed of the mobile communication terminal is large, the fading pitch becomes large, and when the moving speed becomes small, the fading pitch becomes small. Tend. Then, as the fading pitch, for example, an envelope of the waveform of the radio wave is obtained, and the center frequency of the envelope can be used. Further, the peak frequency of the above-mentioned radio waves (excluding the direct-current component and the signal component of the radio waves) can also be used.
[0031]
The standby control unit 6 controls ON / OFF of a standby operation of the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3. That is, based on the communication network detection information generated by the communication network detection unit 4 described above and the fading pitch measured by the fading pitch measurement unit 5, the mobile telephone network wireless reception unit 2 and the wireless LAN wireless reception unit 3 are respectively on standby. The operation is turned on to enter the standby state, or the standby operation is turned off to release the standby state. The details of the standby control method will be described later.
[0032]
Subsequently, an operation of the mobile communication terminal 1 according to the present embodiment will be described, and a standby control method of the mobile communication terminal 1 according to the present embodiment will be described. 2 to 5 are flowcharts of the standby control method of the mobile communication terminal 1 according to the present embodiment.
[0033]
First, as shown in FIG. 2, the communication network detection unit 4 provided in the mobile communication terminal 1 receives the radio wave received by the mobile phone network radio reception unit 2 and the radio wave received by the wireless LAN radio reception unit 3 respectively. Measure the strength. When the reception intensity of the radio wave received by the mobile phone network wireless receiver 2 is equal to or higher than a certain level, it is determined that the mobile phone is in the communication area of the mobile phone network, and the reception of the radio wave received by the wireless LAN wireless receiver 3 is performed. If the strength is equal to or higher than a certain strength, it is determined that the vehicle is within the communication area of the wireless LAN, and communication network detection information relating to these determination results is generated (step S1).
[0034]
Next, the standby control unit 6 determines from which communication network radio waves can be received at the location of the mobile communication terminal 1 based on the communication network detection information generated by the communication network detection unit 4 (steps S2 to S4). ), And performs the following different processes according to the judgment. First, it is determined whether the mobile communication terminal 1 can receive radio waves only from the mobile phone network (step S2). When it is determined that the mobile communication terminal 1 can receive radio waves only from the mobile phone network, the processing of the flowchart shown in FIG. 3 is performed. At this time, as shown in FIG. 3, first, the standby control unit 6 turns on the standby operation of the mobile phone network wireless reception unit 2 and turns off the standby operation of the wireless LAN wireless reception unit 3. That is, only the mobile telephone network wireless receiving unit 2 is set in a standby state (step S101).
[0035]
Next, the fading pitch measuring unit 5 measures the fading pitch of the radio wave received by the mobile phone network wireless receiving unit 2 in the standby operation at this time (step S102). If the fading pitch measured by the fading pitch measuring unit 5 is f [Hz], the upper threshold fmax [Hz] of the fading pitch is fmin [Hz], and the lower threshold of the fading pitch is fmin [Hz], f is smaller than fmin, Alternatively, it is determined whether or not f is larger than fmax (step S103). When f is smaller than fmin, or when f is larger than fmax, the mobile phone network wireless receiving unit 2 is turned on and the standby operation of the wireless LAN wireless receiving unit 3 is turned off. . That is, when f is smaller than fmin, it is expected that the mobile communication terminal 1 has hardly moved, so that the current state of waiting for radio waves only by the mobile phone network wireless receiver 2 is continued. If f is greater than fmax, the mobile communication terminal 1 is expected to move at a high speed, so that the mobile phone network wireless receiver 2 receives radio waves from the mobile phone network having a wider communication area than the wireless LAN. Only the current state of waiting for the radio wave is continued by only.
[0036]
On the other hand, it is determined whether f is smaller than fmin or f is larger than fmax (step S103). If this condition is not satisfied, that is, if f is not smaller than fmin and not larger than fmax, the mobile phone network wireless communication is performed. The current state in which the standby operation of the receiving unit 2 is turned on is maintained, and the standby operation of the wireless LAN wireless receiving unit 3 is also turned on (step S104). That is, when the mobile communication terminal 1 is moving but its speed is not high, both the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 wait for radio waves.
[0037]
Next, the communication network detection unit 4 determines the mobile phone network and the wireless LAN from the reception intensity of the radio wave received by the receiving unit during the standby operation among the mobile phone network wireless reception unit 2 and the wireless LAN wireless reception unit 3. It detects whether or not radio waves can be received from the mobile phone, and generates communication network detection information on whether or not the mobile phone is within the communication range of each of the mobile phone network and the wireless LAN (step S105). As described above, the communication network detection information indicates that when a radio wave having a certain strength or more is received by the receiving unit in the standby operation among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 as described above, the receiving unit Is generated within the communication range of the corresponding communication network. On the other hand, when the standby operation of each of the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 is OFF, it is generated as being out of the communication range of the corresponding communication network.
[0038]
Then, the standby control unit 6 determines from which communication network the radio wave can be received at the location of the mobile communication terminal 1 based on the communication network detection information generated by the communication network detection unit 4 (steps S106 to S108). The following different processes are respectively performed according to the determination. First, it is determined whether or not radio waves can be received only from the mobile phone network (step S106). Then, when radio waves can be received only from the mobile phone network, the processing shown in the flowchart of FIG. 3 is repeated. Further, it is determined whether or not it is determined that the radio wave can be received only from the wireless LAN (step S107). If the radio wave can be received only from the wireless LAN, the process shown in the flowchart of FIG. 4 is performed. It is determined whether radio waves can be received from both the mobile phone network and the wireless LAN network (step S108). If radio waves can be received from both the mobile phone network and the wireless LAN network, the process returns to the flowchart of FIG. The following processing is performed. On the other hand, when it is determined that radio waves cannot be received from both the mobile phone network and the wireless LAN network, the processing shown in the flowchart of FIG. 6 is performed.
[0039]
Returning to FIG. 2, it is determined whether the mobile communication terminal 1 can receive radio waves only from the wireless LAN (step S3). If the mobile communication terminal 1 can receive radio waves only from the wireless LAN, the processing of the flowchart shown in FIG. 4 is performed. At this time, as shown in FIG. 4, first, the standby control unit 6 turns on the standby operation of the wireless LAN wireless receiving unit 3 and turns off the standby operation of the mobile phone network wireless receiving unit 2. That is, only the wireless LAN wireless receiving unit 3 is set in a standby state (step S201).
[0040]
Next, the fading pitch measuring unit 5 measures the fading pitch of the radio wave received by the wireless LAN wireless receiving unit 3 in the standby operation at this time (step S202). If the fading pitch measured by the fading pitch measuring unit 5 is f [Hz], the upper threshold of the fading pitch is fmax [Hz], and the lower threshold of the fading pitch is fmin [Hz], f is larger than fmax. Is determined (step S203). If f is greater than fmax, the standby operation of the mobile telephone network wireless receiving unit 2 is turned on, and the standby operation of the wireless LAN wireless receiving unit 3 is turned off (step S204). That is, when f is larger than fmax, the mobile communication terminal 1 is expected to move at a high speed, and thus the mobile phone network wireless receiver 2 receives radio waves from the mobile phone network having a wider communication area than the wireless LAN. Only listen to the radio wave.
[0041]
Further, it is determined whether or not f is equal to or more than fmin and equal to or less than fmax (step S205). When this condition is satisfied, the current state in which the standby operation of the wireless LAN wireless reception unit 3 is ON is maintained, and Then, the standby operation of the mobile telephone network wireless receiver 2 is turned ON (step S206). That is, when the mobile communication terminal 1 is moving but its speed is not high, both the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 wait for radio waves.
[0042]
Further, it is determined whether or not f is equal to or more than fmin and equal to or less than fmax (step S205). If this condition is not satisfied, that is, if f is smaller than fmin, it is determined that the mobile communication terminal 1 has hardly moved. Therefore, the standby operation of the mobile telephone network wireless receiving unit 2 is turned off, the standby operation of the wireless LAN wireless receiving unit 3 is turned on, and the current state of waiting for a radio wave from the wireless LAN is continued.
[0043]
Next, the communication network detection unit 4 determines the mobile phone network and the wireless LAN from the reception intensity of the radio wave received by the receiving unit during the standby operation among the mobile phone network wireless reception unit 2 and the wireless LAN wireless reception unit 3. It detects whether or not it is possible to receive a radio wave, and generates communication network detection information as to whether or not it is within the communication range of each of the mobile phone network and the wireless LAN (step S207). As described above, the communication network detection information indicates that when a radio wave having a certain strength or more is received by the receiving unit in the standby operation among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 as described above, the receiving unit Is generated within the communication range of the corresponding communication network. On the other hand, when the standby operation of each of the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 is OFF, it is generated as being out of the communication range of the corresponding communication network.
[0044]
Then, the standby control unit 6 determines from which communication network radio waves can be received at the location of the mobile communication terminal 1 based on the communication network detection information generated by the communication network detection unit 4 (steps S208 to S210). The following different processes are respectively performed according to the determination. First, it is determined whether or not radio waves can be received only from the mobile phone network (step S208). If radio waves can be received only from the mobile phone network, the processing shown in the flowchart of FIG. 3 is performed. Also, it is determined whether or not radio waves can be received only from the wireless LAN (step S209). If radio waves can be received only from the wireless LAN, the process shown in the flowchart of FIG. 4 is repeated. In addition, it is determined whether radio waves can be received from both the mobile phone network and the wireless LAN network (step S210). If this condition is satisfied, the processing shown in the flowchart of FIG. 5 is performed. On the other hand, when this condition is not satisfied, that is, when radio waves cannot be received from both the mobile phone network and the wireless LAN network, the processing shown in the flowchart of FIG. 6 is performed.
[0045]
Returning to FIG. 2, it is determined whether the mobile communication terminal 1 can receive radio waves from both the mobile phone network and the wireless LAN (step S4). Then, when the mobile communication terminal 1 can receive radio waves from both the mobile phone network and the wireless LAN, the processing of the flowchart shown in FIG. 5 is performed. At this time, as shown in FIG. 5, first, the standby control unit 6 turns on the standby operation of the wireless LAN wireless receiving unit 3 and turns off the standby operation of the mobile phone network wireless receiving unit 2. That is, when it is determined that radio waves can be received from both the mobile phone network and the wireless LAN, only the wireless LAN wireless receiving unit 3 that can communicate at a higher communication speed is set in a standby state (step S301). ).
[0046]
Next, the fading pitch measuring unit 5 measures the fading pitch of the radio wave received by the wireless LAN wireless receiving unit 3 in the standby operation at this time (step S302). If the fading pitch measured by the fading pitch measuring unit 5 is f [Hz], the upper threshold of the fading pitch is fmax [Hz], and the lower threshold of the fading pitch is fmin [Hz], f is larger than fmax. Is determined (step S303). If f is larger than fmax, the standby operation of the mobile telephone network wireless receiving unit 2 is turned on, and the standby operation of the wireless LAN wireless receiving unit 3 is turned off (step S304). That is, when f is greater than fmax, it is expected that the mobile communication terminal 1 is moving at a high speed, so that the mobile phone network wireless reception for receiving radio waves from the mobile phone network having a wider communication area than the wireless LAN is performed. Only the unit 2 waits for radio waves.
[0047]
Further, it is determined whether or not f is not less than fmin and not more than fmax (step S305). When f is equal to or more than fmin and equal to or less than fmax, the current state in which the standby operation of the wireless LAN wireless reception unit 3 is turned on is maintained, and the standby operation of the mobile phone network wireless reception unit 2 is turned on ( Step S306). That is, when the mobile communication terminal 1 is moving but its speed is not high, both the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 wait for radio waves.
[0048]
Further, it is determined whether or not f is equal to or more than fmin and equal to or less than fmax (step S305). If this condition is not satisfied, that is, if f is smaller than fmin, it is expected that the mobile communication terminal 1 hardly moves. Therefore, the standby operation of the mobile phone network wireless receiving unit 2 is turned off, the standby operation of the wireless LAN wireless receiving unit 3 is turned on, and the current state of waiting for radio waves from the wireless LAN is continued.
[0049]
Next, the communication network detection unit 4 determines the mobile phone network and the wireless LAN from the reception intensity of the radio wave received by the receiving unit during the standby operation among the mobile phone network wireless reception unit 2 and the wireless LAN wireless reception unit 3. Or not, and generates communication network detection information as to whether or not it is within the communication range of each of the mobile phone network and the wireless LAN (step S307). As described above, the communication network detection information indicates that when a radio wave having a certain strength or more is received by the receiving unit in the standby operation among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 as described above, the receiving unit Is generated within the communication range of the corresponding communication network. On the other hand, when the standby operation of each of the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 is OFF, it is generated as being out of the communication range of the corresponding communication network.
[0050]
Then, the standby control unit 6 determines from which communication network the radio wave can be received at the location of the mobile communication terminal 1 based on the communication network detection information generated by the communication network detection unit 4 (steps S308 to S310). The following different processes are performed according to the determination. First, it is determined whether or not radio waves can be received only from the mobile phone network (step S308). Then, when radio waves can be received only from the mobile phone network, the processing shown in the flowchart of FIG. 3 is performed. Also, it is determined whether or not radio waves can be received only from the wireless LAN (step S309). If radio waves can be received only from the wireless LAN, the process shown in the flowchart of FIG. 4 is performed. It is also determined whether radio waves can be received from both the mobile phone network and the wireless LAN network (step S310). If this condition is satisfied, the process shown in the flowchart of FIG. 5 is repeated. On the other hand, when this condition is not satisfied, that is, when radio waves cannot be received from both the mobile phone network and the wireless LAN network, the processing shown in the flowchart of FIG. 6 is performed.
[0051]
Returning to FIG. 2, it is determined whether the mobile communication terminal 1 can receive radio waves from both the mobile phone network and the wireless LAN (step S4). If this condition is not satisfied, that is, if the mobile communication terminal 1 If radio waves cannot be received from both the telephone network and the wireless LAN, the processing of the flowchart shown in FIG. 6 is performed. At this time, as shown in FIG. 6, first, the standby control unit 6 turns off the standby operation of both the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 for a predetermined time (step S401). Then, after a predetermined time has elapsed, the standby control unit 6 turns on the standby operation of both the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 (step S402).
[0052]
Next, the communication network detection unit 4 determines whether or not radio waves can be received from the mobile phone network and the wireless LAN based on the reception intensity of the radio waves received by the mobile phone network wireless reception unit 2 and the wireless LAN wireless reception unit 3 respectively. And generates communication network detection information as to whether or not the communication network exists in the communication area of each of the mobile phone network and the wireless LAN (step S403).
[0053]
Then, the standby control unit 6 determines from which communication network radio waves can be received at the location of the mobile communication terminal 1 based on the communication network detection information generated by the communication network detection unit 4 (steps S404 to S406). The following different processes are respectively performed according to the determination. First, it is determined whether or not radio waves can be received only from the mobile phone network (step S404). Then, when radio waves can be received only from the mobile phone network, the processing shown in the flowchart of FIG. 3 is performed. Further, it is determined whether or not radio waves can be received only from the wireless LAN (step S405). Then, when radio waves can be received only from the wireless LAN, the processing shown in the flowchart of FIG. 4 is performed. It is determined whether radio waves can be received from both the mobile phone network and the wireless LAN network (step S406). If this condition is satisfied, the processing shown in the flowchart of FIG. 5 is performed. On the other hand, if this condition is not satisfied, that is, if it is determined that radio waves cannot be received from both the mobile phone network and the wireless LAN network, the processing shown in the flowchart of FIG. 6 is repeated.
[0054]
Subsequently, the standby control program 100 according to the embodiment will be described. FIG. 7 is a block diagram showing a module configuration of the standby control program 100. As shown in FIG. 7, the standby control program 100 according to the present embodiment includes a main module 101, a communication network detection module 102, a fading pitch measurement module 103, and a standby control module 104. The main module 101 is a module that supervises processing. The communication network detection module 102, the fading pitch measurement module 103, and the standby control module 104 are respectively a communication network detection unit 4, a fading pitch measurement unit 5, and a standby control unit 6. The function is realized by the mobile communication terminal 1. Accordingly, when the installer of the standby control program 100 is downloaded to the mobile communication terminal 1 from the server that manages the installer of the standby control program 100, and the standby control program 100 is installed in the mobile communication terminal 1, the above-described standby control is performed. Is realized by the mobile communication terminal 1.
[0055]
Hereinafter, the operation and effect of the mobile communication terminal 1 according to the present embodiment will be described. First, the communication network detecting unit 4 detects the mobile phone network and the wireless LAN based on the reception intensity of the radio wave received by the receiving unit in the standby operation among the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3. It generates communication network detection information as to whether or not each communication area is within the communication range. Further, the fading pitch measuring unit 5 measures the fading pitch of the radio wave received by the receiving unit in the standby operation among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3. Based on the fading pitch and the communication network detection information, the standby control unit 6 controls the standby operation of each of the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3. Here, the fading pitch generally tends to be proportional to the moving speed of the mobile communication terminal 1. Therefore, in accordance with the moving state of the mobile communication terminal 1 based on the moving speed of the mobile communication terminal 1 estimated from the communication network detection information and the fading pitch, a wireless communication method suitable for the moving state of the mobile phone network and the wireless LAN. ON / OFF of the standby operation of the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 is controlled so that radio waves from a communication network employing a communication method can be received. As a result, the power consumption of the mobile communication terminal 1 can be reduced by turning off the standby operation of the receiving unit that is not suitable for the moving state among the mobile telephone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3, and By turning on the standby operation of the receiving unit suitable for the moving situation, suitable communication can be realized. For example, when the fading pitch is large, the speed of the mobile communication terminal 1 is expected to be high. Therefore, only the mobile phone network radio receiver 2 that can receive radio waves from a mobile phone network having a wide communication area suitable for a high mobile speed. The power consumption of the mobile communication terminal 1 is reduced by turning off the standby operation of the wireless communication terminal 1 to realize suitable communication and turning off the standby operation of the wireless LAN wireless reception unit 3. On the other hand, if the moving speed of the mobile communication terminal 1 is expected to be low because the fading pitch is small, and if it is determined from the communication network detection information that the mobile communication terminal 1 is within the communication area of the wireless LAN, the standby control unit 6 sets the wireless reception The standby operation of the unit 3 is turned ON. That is, when it is determined from the communication network area detection information that the mobile communication terminal 1 is within the communication area of the wireless LAN, and it is determined from the fading pitch that the mobile communication terminal 1 hardly moves, communication can be performed at a high communication speed. The standby operation of the wireless LAN wireless receiving unit 3 is turned on to realize suitable communication. When the standby control unit 6 determines that radio waves cannot be received from both the mobile phone network and the wireless LAN based on the communication network detection information generated by the communication network detection unit 4, the standby control unit 6 performs wireless reception on the mobile phone network. The standby operation of both the unit 2 and the wireless LAN wireless receiving unit 3 is turned off for a predetermined time. Thereby, the mobile communication terminal 1 can reduce the power consumption and can confirm again whether the mobile phone network wireless receiving unit 2 and the wireless LAN wireless receiving unit 3 can receive radio waves after a predetermined time has elapsed.
[0056]
The present invention can be variously modified without being limited to the above embodiment. First, the technology shown in the present embodiment is applicable to a mobile communication terminal adopting two wireless communication systems having different communication areas and different communication speeds, such as a mobile phone network and a wireless LAN. Therefore, for example, instead of the wireless LAN wireless receiving unit 3, a receiving unit that receives radio waves from a short-range wireless communication such as Bluetooth can be applied.
[0057]
Further, as described above, the upper limit threshold (fmax) and the lower limit threshold (fmax) applied to the fading pitch measured by the fading pitch measuring unit 5 are measured from radio waves received by the mobile phone network wireless receiving unit 2. Different values may be applied for the fading pitch to be performed and the fading pitch measured from the radio wave received by the wireless LAN wireless receiving unit 3.
[0058]
Further, in the processing of the flowchart shown in FIG. 4, that is, in the case where the mobile communication terminal 1 can receive radio waves from both the mobile phone network and the wireless LAN, the standby operation of the mobile phone network wireless receiving unit 2 is turned off. The wireless LAN wireless receiver 3 waits for a radio wave (step S301), but this setting does not prevent the user from changing the setting. For example, if the user wants to give priority to receiving radio waves from the mobile phone network, the standby operation of the mobile phone network wireless receiver 2 is turned on and the standby operation of the wireless LAN wireless receiver 3 is turned off. It is also possible to change it.
[0059]
【The invention's effect】
According to the present invention, based on a detection result regarding whether or not the mobile phone is within the communication range of the first and second communication networks detected by the communication network detection unit and a fading pitch measured by the fading pitch measurement unit, The standby control unit controls ON / OFF of the standby operation of each of the first and second receiving units. As a result, of the first and second receiving means, the standby operation of the receiving means suitable for the moving situation of the mobile communication terminal is turned on to realize a suitable communication, and the reception not suitable for the moving situation of the mobile communication terminal is realized. By stopping the standby operation of the means, the power consumption of the mobile communication terminal can be reduced.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a functional configuration of a mobile communication terminal according to an embodiment.
FIG. 2 is a flowchart of a standby control method according to the embodiment.
FIG. 3 is a flowchart of a standby control method according to the embodiment;
FIG. 4 is a flowchart of a standby control method according to the embodiment;
FIG. 5 is a flowchart of a standby control method according to the embodiment;
FIG. 6 is a flowchart of a standby control method according to the embodiment.
FIG. 7 is a block diagram illustrating a configuration of a standby control program according to the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mobile communication terminal, 2 ... Mobile telephone network wireless receiving part, 3 ... Wireless LAN wireless receiving part, 4 ... Communication network detecting part, 5 ... Fading pitch measuring part, 6 ... Standby control part

Claims

A first receiving unit for receiving a radio wave from a first communication network based on a predetermined wireless communication system, and a second communication network based on a wireless communication system having a smaller communication area and a higher communication speed than the first communication network. A second receiving means for receiving the radio wave of
Whether or not the first and second receiving means are present in respective communication areas of the first and second communication networks based on the reception intensity of radio waves received by the receiving means in a standby operation; Communication network detecting means for detecting whether
A fading pitch measuring unit that measures a fading pitch based on a radio wave received by the receiving unit during a standby operation, of the first and second receiving units;
On / off of the standby operation of each of the first receiving means and the second receiving means is controlled based on the detection result by the communication network detecting means and the fading pitch measured by the fading pitch measuring means. A mobile communication terminal comprising:

The standby control unit, when it is determined that the fading pitch is smaller than a predetermined lower threshold and is present within the communication range of the second communication network based on the detection result by the communication network detection unit, 2. The mobile communication terminal according to claim 1, wherein a standby operation of the second receiving unit is turned on.

When the fading pitch is larger than a predetermined upper threshold, the standby control unit turns on the standby operation of the first receiving unit and turns off the standby operation of the second receiving unit. The mobile communication terminal according to claim 1 or 2, wherein

The standby control unit determines whether the first and second receiving units are out of the communication range of the first and second communication networks based on the detection result by the communication network detecting unit. The mobile communication terminal according to any one of claims 1 to 3, wherein the operation is turned off for a predetermined time.

A first receiving unit for receiving a radio wave from a first communication network based on a predetermined wireless communication system, and a second communication network based on a wireless communication system having a smaller communication area and a higher communication speed than the first communication network. A standby control method for a mobile communication terminal, comprising:
A communication network detecting unit configured to communicate with each of the first and second communication networks based on a reception intensity of a radio wave received by the receiving unit during a standby operation among the first and second receiving units; Communication network detection step of detecting whether or not it exists in the area,
A fading pitch measuring step of measuring a fading pitch based on a radio wave received by the receiving unit in a standby operation, of the first and second receiving units,
Standby control means, based on a detection result by the communication network detection means and the fading pitch measured by the fading pitch measurement means, performs a standby operation of each of the first reception means and the second reception means. A standby control step of controlling ON / OFF.

In the standby control step, the standby control unit determines that the fading pitch is smaller than a predetermined lower threshold and is within a communication range of the second communication network based on the detection result by the communication network detection unit. 6. The standby control method according to claim 5, wherein when performing the standby operation, the standby operation of the second receiving unit is turned ON.

In the standby control step, when the fading pitch is larger than a predetermined upper threshold, the standby control unit turns on the standby operation of the first receiving unit and sets the standby operation of the second receiving unit to ON. 7. The standby control method according to claim 5, wherein the standby control method is turned off.

In the standby control step, the standby control unit determines that the first and second communication networks are outside the communication range of the first and second communication networks based on the detection result by the communication network detection unit. The standby control method according to any one of claims 5 to 7, wherein the standby operation of the second receiving unit is turned off for a predetermined time.

A first receiving unit for receiving a radio wave from a first communication network based on a predetermined wireless communication system, and a second communication network based on a wireless communication system having a smaller communication area and a higher communication speed than the first communication network. Mobile communication terminal comprising: a second receiving means for receiving the radio wave of
Whether or not the first and second receiving means are present in respective communication areas of the first and second communication networks based on the reception intensity of radio waves received by the receiving means in a standby operation; Communication network detecting means for detecting whether
A fading pitch measuring unit that measures a fading pitch based on a radio wave received by the receiving unit during a standby operation, of the first and second receiving units;
On / off of the standby operation of each of the first receiving means and the second receiving means is controlled based on the detection result by the communication network detecting means and the fading pitch measured by the fading pitch measuring means. A standby control program for functioning as a standby control unit.

The standby control unit, when it is determined that the fading pitch is smaller than a predetermined lower threshold and is present within the communication range of the second communication network based on the detection result by the communication network detection unit, The standby control program according to claim 9, wherein the standby operation of the second receiving unit is turned on.

When the fading pitch is larger than a predetermined upper threshold, the standby control unit turns on the standby operation of the first receiving unit and turns off the standby operation of the second receiving unit. The standby control program according to claim 9 or 10, wherein

The standby control unit determines whether the first and second receiving units are out of the communication range of the first and second communication networks based on the detection result by the communication network detecting unit. The standby control program according to any one of claims 9 to 11, wherein the operation is turned off for a predetermined time.