JP2007251304A - Mobile terminal and control method thereof - Google Patents

Mobile terminal and control method thereof Download PDF

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JP2007251304A
JP2007251304A JP2006068613A JP2006068613A JP2007251304A JP 2007251304 A JP2007251304 A JP 2007251304A JP 2006068613 A JP2006068613 A JP 2006068613A JP 2006068613 A JP2006068613 A JP 2006068613A JP 2007251304 A JP2007251304 A JP 2007251304A
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base station
mobile terminal
wireless communication
service area
communication system
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JP4920999B2 (en
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Yoshiharu Takeuchi
義晴 竹内
Yoshiteru Imaeda
義輝 今枝
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NEC Engineering Ltd
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    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control method of a mobile terminal provided with two systems or more of wireless communication functions such as both a mobile phone function and a wireless LAN function whereby the mobile terminal can quickly be returned to inside the zone of the wireless LAN and save on the power consumption in the case where each function is desirably in operation independently of each other or in other cases. <P>SOLUTION: The control method searches a service area of a base station employing a second wireless communication system adjacent to/not adjacent to a service area of a base station employing a first wireless communication system, stores the searched service area of the base station as inside the zone/outside the zone of the base station employing the first wireless communication system, when the mobile terminal is located in inside the zone, the base station employing the first wireless communication system scans the mobile terminal at a prescribed time interval (shorter time interval), and when the mobile terminal is located outside the zone, the base station employing the first wireless communication system scans the mobile terminal at a time interval longer than the prescribed time interval, or executes no scanning. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、携帯端末装置及びその制御方法に関し、特に、２方式以上の無線通信機能を有する携帯端末装置の待ち受け電力を低減する技術に関する。   The present invention relates to a portable terminal device and a control method thereof, and more particularly to a technique for reducing standby power of a portable terminal device having two or more wireless communication functions.

従来、携帯端末装置において、携帯電話、無線ＬＡＮ（Wireless ＬＡＮ、以下「ＷＬＡＮ」ともいう）ともに共通の課題であるが、圏外時における基地局のスキャン時間間隔は、消費電力と情報通信網への接続性に関与し、スキャン時間間隔が短いと情報通信網への接続性は良くなるが、電波の送受信を含めた動作が頻繁になるため、単位時間あたりの消費電力が大きくなる。逆に、圏外時のスキャン時間間隔が長いと情報通信網への接続性は悪くなるが、電波の送受信を含めた動作が緩慢になるため、単位時間あたりの消費電力が小さくなる。   Conventionally, in mobile terminal devices, it is a common problem for both mobile phones and wireless LANs (hereinafter also referred to as “WLANs”), but the scan time interval of the base station when out of service area is related to power consumption and information communication network. If the scan time interval is short due to the connectivity, the connectivity to the information communication network is improved, but the operation including the transmission and reception of radio waves becomes frequent, so that the power consumption per unit time increases. Conversely, if the scan time interval outside the service area is long, connectivity to the information communication network is degraded, but operations including transmission / reception of radio waves become slow, and power consumption per unit time is reduced.

このような相反する性能を改善すべく、特許文献１には、圏外エリアで基地局のスキャン時間間隔を変更して長くする条件として、受信状態の変化によって携帯端末装置が移動しているか否かを判断し、移動していない場合には、基地局のスキャン時間間隔を長くする方法で消費電力を改善する無線電話機の通信システムが提案されている。   In order to improve such conflicting performance, Patent Document 1 describes whether or not the mobile terminal device is moving due to a change in the reception state as a condition for changing and lengthening the scan time interval of the base station in the out-of-service area. If the mobile station is not moving, a wireless telephone communication system has been proposed that improves power consumption by increasing the scan time interval of the base station.

また、特許文献２には、圏外エリアにおける基地局のスキャン時間間隔を、使用頻度に基づき、圏内に存在する時間帯では、スキャン周期を短くして情報通信網への接続性を向上させるとともに、携帯端末装置が必ず圏外に存在し、通信を行う必要のない時間帯では、スキャン周期を長く設定することで待ち受け消費電力を改善する無線通信装置が提案されている。   Further, in Patent Document 2, the scan time interval of the base station in the out-of-service area is based on the use frequency, and in the time zone existing within the service area, the scan cycle is shortened to improve the connectivity to the information communication network, There has been proposed a wireless communication device that improves standby power consumption by setting a long scan period in a time zone in which the mobile terminal device is always outside the service area and communication is not necessary.

次に、従来の２方式以上の無線通信機能を有する携帯端末装置（以下、「携帯端末」という）の構成及び動作の一例について図４を参照しながら説明する。   Next, an example of the configuration and operation of a conventional mobile terminal device (hereinafter referred to as “mobile terminal”) having two or more wireless communication functions will be described with reference to FIG.

同図において、参照番号２０２、３０６、３０４は、携帯端末１０１Ａ、１０１Ｂ、１０１Ｃが移動したときの無線ＬＡＮのアクセスポイント２０１、及び基地局３０３、３０１がカバーするサービスエリア、すなわち圏内エリアである。   In the figure, reference numerals 202, 306, and 304 are service areas that are covered by the wireless LAN access point 201 and the base stations 303 and 301 when the mobile terminals 101A, 101B, and 101C move, that is, in-service areas.

携帯端末１０１Ａは、無線ＬＡＮの圏内２０２になり、携帯端末１０１Ｂ、１０１Ｃは、無線ＬＡＮの圏外になる。携帯端末１０１Ａが無線ＬＡＮのアクセスポイント（以下「ＡＰ」という）の圏内２０２から圏外３０６に移動すると、無線ＬＡＮのＡＰ２０１のスキャンをタイマ値で繰り返すようになる。このとき、無線ＬＡＮのＡＰ２０１が見つからないと、スキャンする時間間隔を延長して消費電力を節約する。   The portable terminal 101A is in the wireless LAN area 202, and the portable terminals 101B and 101C are out of the wireless LAN area. When the portable terminal 101A moves from the wireless LAN access point (hereinafter referred to as “AP”) 202 to the outside 306, the wireless LAN AP 201 scan is repeated with a timer value. At this time, if the wireless LAN AP 201 is not found, the scanning time interval is extended to save power consumption.

特許文献１に記載の無線電話機の通信システムのように、無線ＬＡＮのＡＰの圏外３０６に位置する携帯端末１０１Ｂが、携帯基地局３０３の受信状態(レベル)を検出して一定の値以上の変化がない場合には、携帯端末１０１Ｂの位置が移動していないと判断し、スキャンする時間間隔を長くする。   As in the wireless telephone communication system described in Patent Document 1, the mobile terminal 101B located outside the AP 306 of the wireless LAN AP detects the reception state (level) of the mobile base station 303 and changes more than a certain value. If there is no, it is determined that the position of the mobile terminal 101B has not moved, and the scanning time interval is lengthened.

また、従来の方法では、圏外状態からの復帰時間を必要以上に長くしないため、スキャン時間間隔を長くし過ぎないように上限を設け、また、２つの通信方式を備える携帯電話では通信方式に優先度を設け、片方が圏内であったときはもう片方をサーチしないなどの方法により省電力を実現していた。   In addition, in the conventional method, since the return time from the out-of-service state is not unnecessarily prolonged, an upper limit is set so that the scan time interval is not excessively long. In addition, a mobile phone having two communication methods has priority over the communication method. Power saving was realized by a method such as setting a degree and not searching the other when one was within range.

特開２００２−１４２２６３号公報JP 2002-142263 A 特開平８−９８２５２号公報JP-A-8-98252

しかし、上記従来の各々の携帯電話と無線ＬＡＮ等のネットワークのように、互いに優先度を設けず、どちらも各々独立して動作させたい場合には、各々の基地局（ＡＰ）のスキャン時間間隔の調整についても各々独立にする必要があった。   However, as in the conventional mobile phones and wireless LAN networks, when priority is not provided to each other and both are to operate independently, the scan time interval of each base station (AP) It was necessary to make each adjustment independent.

また、予め設定される圏外エリアから圏内エリアに移動して基地局が切り替わる場合には、圏外エリアでは予めスキャン時間間隔が長く設定されているため、圏内に復帰するにあたって時間を要するという問題があった。   In addition, when a base station is switched from a preset out-of-service area to a within-service area, there is a problem that it takes time to return to the service area because the scan time interval is set longer in the out-of-service area. It was.

さらに、圏外エリアにおけるスキャン間隔は、圏外状態からの復帰時間を必要以上に長くならないように上限が定められているため、消費電力を節約しにくいという問題があった。   Furthermore, since the upper limit of the scan interval in the out-of-service area is set so that the recovery time from the out-of-service state is not longer than necessary, there is a problem that it is difficult to save power consumption.

そこで、本発明は、上記従来の携帯端末等における問題点に鑑みてなされたものであって、２方式以上の無線通信機能を有する携帯端末、例えば、携帯電話と無線ＬＡＮの両機能を備えた携帯端末のどちらも各々独立して動作させたい場合等に、無線ＬＡＮの圏内に迅速に復帰することができるとともに、消費電力を節約することも可能な携帯端末及びその制御方法を提供することを目的とする。   Therefore, the present invention has been made in view of the problems in the above-described conventional portable terminal and the like, and has a portable terminal having two or more wireless communication functions, for example, both functions of a portable telephone and a wireless LAN. To provide a portable terminal capable of quickly returning to the area of the wireless LAN and saving power consumption when it is desired to operate both of the portable terminals independently, and a control method thereof. Objective.

上記目的を達成するため、本発明は、２方式以上の無線通信機能を備える携帯端末の制御方法であって、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏内として記憶し、前記第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏外として記憶し、前記携帯端末が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末を走査し、前記携帯端末が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末を走査するか、走査を行わないことを特徴とする。   In order to achieve the above object, the present invention is a method for controlling a portable terminal having two or more wireless communication functions, and is a second wireless communication method adjacent to a service area of a base station in the first wireless communication method. The base station service area is searched for, and the searched base station service area is stored as a base station area in the first wireless communication system, and adjacent to the base station service area in the first wireless communication system The service area of the base station in the second wireless communication method that is not searched is searched, the service area of the searched base station is stored as outside the service area of the base station in the first wireless communication method, and the mobile terminal is located in the area If the mobile terminal scans the mobile terminal at a predetermined time interval from the base station in the first wireless communication system, and the mobile terminal is located outside the service area It is characterized in that the first at a time interval longer than the predetermined time interval from a base station in a wireless communication system or scanning the mobile terminal does not perform the scan.

そして、本発明によれば、時間帯等によって第１の無線通信方式のスキャン周期を変更するのではなく、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアに位置する場合には、第１の無線通信方式でのスキャン周期を短くすることで第１の無線通信方式のサービスエリア内に入ったことを迅速に検出することができるため、第１の無線通信方式のサービスエリアの状態に即座に移行することができる。   According to the present invention, instead of changing the scan period of the first wireless communication method according to the time zone or the like, in the second wireless communication method adjacent to the service area of the base station in the first wireless communication method. When it is located in the service area of the base station, it is possible to quickly detect that the mobile station has entered the service area of the first wireless communication method by shortening the scan period in the first wireless communication method. It is possible to immediately shift to the state of the service area of the first wireless communication method.

さらに、本発明によれば、携帯端末が、第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアに位置する場合には、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアに位置する場合よりも長い時間間隔で該携帯端末を走査するか、走査を行わないため、従来のように走査時間間隔の上限を設ける必要がなく、携帯端末の消費電力を大幅に節約することができる。   Further, according to the present invention, when the mobile terminal is located in the service area of the base station in the second radio communication system that is not adjacent to the service area of the base station in the first radio communication system, the first radio Since the mobile terminal is scanned or not scanned at a longer time interval than when located in the service area of the base station in the second wireless communication system adjacent to the service area of the base station in the communication system, It is not necessary to provide an upper limit for the scanning time interval, and the power consumption of the mobile terminal can be greatly saved.

前記携帯端末の制御方法において、前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことができる。また、２方式の携帯電話機能、例えば、ＰＤＣとＷＣＤＭＡとの間、ＷＣＤＭＡとＧＳＭとの間等において本発明にかかる制御方法を適用することもできる。   In the portable terminal control method, the two or more wireless communication functions may include a cellular phone function and a wireless LAN function. The control method according to the present invention can also be applied in two types of cellular phone functions, for example, between PDC and WCDMA, between WCDMA and GSM, and the like.

また、本発明は、２方式以上の無線通信機能を備える携帯端末であって、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局、及び隣接しない第２の無線通信方式における基地局のサービスエリアを検索する検索部と、該検索部によって検索された前記隣接する第２の無線通信方式における基地局を圏内として、前記検索部によって検索された前記隣接しない第２の無線通信方式における基地局を圏外として記憶する記憶部と、前記携帯端末が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末を走査し、前記携帯端末が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末を走査するか、走査を行わない走査部とを備えることを特徴とする。   In addition, the present invention is a portable terminal having two or more wireless communication functions, and a base station in a second wireless communication system adjacent to a service area of a base station in the first wireless communication system, and a non-adjacent first station. A search unit that searches for a service area of a base station in the second wireless communication system, and the adjacent unit searched by the search unit within a base station in the adjacent second wireless communication system searched by the search unit And a storage unit that stores a base station in the second wireless communication system as out of service area, and when the mobile terminal is located within the service area, the mobile station at a predetermined time interval from the base station in the first wireless communication system When scanning the terminal, and the mobile terminal is located outside the service area, the base station in the first wireless communication system at a time interval longer than the predetermined time interval Or scan the portable terminal, characterized by comprising a scanning unit which does not perform the scan.

この携帯端末によれば、携帯端末が、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアに位置する場合には、第１の無線通信方式のサービスエリアの状態に即座に移行することができ、第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアに位置する場合には、携帯端末の消費電力を大幅に節約することができる。   According to this portable terminal, when the portable terminal is located in the service area of the base station in the second wireless communication method adjacent to the service area of the base station in the first wireless communication method, the first wireless communication The mobile station can immediately transition to the service area state of the system and is located in the service area of the base station in the second wireless communication system that is not adjacent to the service area of the base station in the first wireless communication system. The power consumption of the terminal can be greatly saved.

前記携帯端末において、前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことができ、ＰＤＣとＷＣＤＭＡとの間等、２方式の携帯電話機能間についても本発明を適用することができる。   In the mobile terminal, the wireless communication function of the two or more systems can include a mobile phone function and a wireless LAN function, and the present invention can also be applied between two mobile phone functions such as between PDC and WCDMA. Can be applied.

また、本発明は、２方式以上の無線通信機能を備える携帯端末を制御するためのプログラムであって、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏内として記憶するステップと、前記第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏外として記憶するステップと、前記携帯端末が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末を走査するステップと、前記携帯端末が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末を走査するか、走査を行わないようにするステップとを備えることを特徴とする。   The present invention is also a program for controlling a mobile terminal having two or more wireless communication functions, and a base in a second wireless communication system adjacent to a service area of a base station in the first wireless communication system. Searching for the service area of the station, storing the searched service area of the base station as a base station area in the first wireless communication system, and adjacent to the service area of the base station in the first wireless communication system Searching for the service area of the base station in the second wireless communication method not to be stored, and storing the searched service area of the base station as out of service area of the base station in the first wireless communication method; The mobile terminal is scanned at a predetermined time interval from the base station in the first wireless communication method, When the mobile terminal is located outside the service area, scanning the mobile terminal at a time interval longer than the predetermined time interval from the base station in the first wireless communication method or not scanning It is characterized by providing.

この制御プログラムによれば、２方式以上の無線通信機能を備える携帯端末が、第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアに位置する場合には、第１の無線通信方式のサービスエリアの状態に即座に移行することができ、第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアに位置する場合には、携帯端末の消費電力を大幅に節約することができる。   According to this control program, a mobile terminal having two or more wireless communication functions is located in the service area of the base station in the second wireless communication system adjacent to the service area of the base station in the first wireless communication system. In this case, the service of the base station in the second wireless communication method that can immediately transition to the state of the service area of the first wireless communication method and is not adjacent to the service area of the base station in the first wireless communication method. When located in the area, the power consumption of the mobile terminal can be greatly saved.

前記制御プログラムにおいて、前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことができ、ＰＤＣとＷＣＤＭＡとの間等、２方式の携帯電話機能間についても本発明にかかる制御プログラムを適用することができる。   In the control program, the wireless communication functions of the two or more systems can include a mobile phone function and a wireless LAN function, and the present invention also applies to two mobile phone functions such as between PDC and WCDMA. Such a control program can be applied.

以上のように、本発明によれば、２方式以上の無線通信機能を有する携帯端末のどちらの機能も各々独立して動作させたい場合等に、一方の圏内に迅速に復帰することができるとともに、携帯端末の消費電力を節約することも可能となる。   As described above, according to the present invention, it is possible to quickly return to one area when it is desired to operate both functions of a mobile terminal having two or more wireless communication functions independently. It is also possible to save power consumption of the mobile terminal.

次に、本発明の実施の形態について図面を参照しながら説明する。尚、以下の説明においては、携帯電話機能と、無線ＬＡＮ機能を有する携帯端末に本発明を適用した場合を例にとって説明する。   Next, embodiments of the present invention will be described with reference to the drawings. In the following description, a case where the present invention is applied to a mobile terminal having a mobile phone function and a wireless LAN function will be described as an example.

図１は、本発明にかかる携帯端末の構成を示し、この携帯端末１０１は、データベースを備えたメモリ１３０と、ＣＰＵ１２０と、ＴＲＸ１１０とで構成される。   FIG. 1 shows a configuration of a mobile terminal according to the present invention. The mobile terminal 101 includes a memory 130 having a database, a CPU 120, and a TRX 110.

メモリ１３０は、携帯端末１０１が携帯基地局へ帰属したときに無線ＬＡＮのＡＰ圏内であるか否かを判断をし、その結果を登録するデータベースを備え、無線ＬＡＮのＡＰ圏内である場合には、圏内側のグループとして登録し、無線ＬＡＮのＡＰ圏外である場合には、帰属した携帯基地局が既に登録されているか否かを検索し、未登録の場合には圏外側のグループとして登録する。   When the mobile terminal 101 belongs to the mobile base station, the memory 130 determines whether or not the wireless LAN is within the AP range of the wireless LAN, and includes a database for registering the result. If it is outside the AP range of the wireless LAN, it is searched whether or not the mobile base station to which it belongs has already been registered, and if it is not registered, it is registered as a group outside the range. .

ＣＰＵ１２０は、上述のようにして作成されたメモリ１３０のデータベースを使用してスキャン周期を決定する。すなわち、帰属した携帯基地局が圏内側のグループであるか否かをメモリ１３０のデータベースを検索し、検索結果が圏内側のグループである場合には、スキャン周期を短いタイマ値で動作する。一方、検索結果が圏外側のグループである場合には、スキャン周期を長いタイマ値で動作する。   The CPU 120 determines the scan period using the database of the memory 130 created as described above. That is, the database of the memory 130 is searched to determine whether or not the mobile base station to which it belongs is a group on the area side, and when the search result is the group on the area side, the scan cycle operates with a short timer value. On the other hand, when the search result is a group outside the service area, it operates with a timer value having a long scan period.

ＴＲＸ１１０は、無線部であって、ＣＰＵ１２０の制御により無線ＬＡＮのＡＰのスキャンを行う機能を有する。すなわち、ＴＲＸ１１０は、ＣＰＵ１２０の制御により、上述の要領で決定した周期で無線ＬＡＮのＡＰのスキャンを行う。また、無線ＬＡＮのＡＰを検出した場合には、無線ＬＡＮのＡＰ圏内となる。無線ＬＡＮのＡＰを検出できない場合には、無線ＬＡＮのＡＰ圏外となる。   The TRX 110 is a wireless unit, and has a function of scanning a wireless LAN AP under the control of the CPU 120. That is, the TRX 110 scans the AP of the wireless LAN with the cycle determined in the above manner under the control of the CPU 120. When a wireless LAN AP is detected, the wireless LAN AP is located. If the wireless LAN AP cannot be detected, the wireless LAN is out of the AP range.

次に、上記構成を有する携帯端末１０１の動作について、図２を参照しながら説明する。尚、この携帯端末は、無線ＬＡＮのサービスエリア内(圏内)に位置するときと、サービスエリア外(圏外)となってから一定時間内に携帯基地局（のＩＤ）を記録する機能を有している。   Next, the operation of the mobile terminal 101 having the above configuration will be described with reference to FIG. This mobile terminal has a function of recording the mobile base station (ID) within a certain time after being located within the service area (range) of the wireless LAN and outside the service area (out of range). ing.

携帯端末が１０１Ａ、１０１Ｂ、１０１Ｃ、１０１Ｄの順に移動するものとする。無線ＬＡＮのＡＰ２０１の圏内エリア２０２において、携帯端末１０１Ａがスキャンすることのできた携帯の基地局Ｂ３０２、基地局Ｃ３０３を圏内側のグループに記憶する。また、携帯端末１０１Ｃがスキャンできた携帯の基地局Ａ３０１を圏外側のグループに記憶する。   Assume that the mobile terminals move in the order of 101A, 101B, 101C, and 101D. In the area 202 of the wireless LAN AP 201, the mobile base station B302 and the base station C303 that can be scanned by the mobile terminal 101A are stored in the group on the area side. In addition, the mobile base station A301 scanned by the mobile terminal 101C is stored in a group outside the service area.

ここで、携帯端末１０１Ａから携帯端末１０１Ｂに移動すると、無線ＬＡＮの圏外になる。また、携帯端末１０１Ｂは、携帯の基地局Ｃ３０３の圏内３０６になる。基地局Ｃ３０３は、圏内側のグループに記憶されているため、スキャンの間隔は復帰時間を考慮に入れた間隔の短いタイマ値になる。   Here, when the mobile terminal 101A moves to the mobile terminal 101B, the wireless LAN is out of range. Also, the portable terminal 101B is within the area 306 of the portable base station C303. Since the base station C303 is stored in the group on the side of the area, the scan interval is a timer value with a short interval taking the return time into consideration.

次に、携帯端末１０１Ｂから携帯端末１０１Ｃに移動すると、無線ＬＡＮの圏外の状態が維持される。携帯端末１０１Ｃは、携帯の基地局Ａ３０１の圏内３０４になる。基地局Ａ３０１は、圏外側のグループに記憶されているため、スキャンの間隔は復帰時間を考慮に入れた間隔より長いタイマ値になる。   Next, when the mobile terminal 101B moves to the mobile terminal 101C, the state outside the range of the wireless LAN is maintained. The portable terminal 101C is within the area 304 of the portable base station A301. Since the base station A301 is stored in the group outside the service area, the scan interval becomes a timer value longer than the interval taking the return time into consideration.

さらに、携帯端末１０１Ｃから１０１Ｄに移動すると、無線ＬＡＮの圏外の状態が維持される。また、携帯端末１０１Ｄは、携帯の基地局Ｂ３０２の圏内３０５になる。基地局Ｂ３０２は、圏内側のグループに記憶されているため、スキャンの間隔は復帰時間を考慮に入れた間隔の短いタイマ値になる。   Further, when the mobile terminal 101C moves to 101D, the state outside the range of the wireless LAN is maintained. Also, the portable terminal 101D is within the area 305 of the portable base station B302. Since the base station B302 is stored in the group on the area side, the scan interval is a timer value with a short interval taking the return time into consideration.

以上、詳細に本発明の実施の形態を述べたが、図２の携帯端末、携帯の基地局、無線ＬＡＮのＡＰは、当業者にとってよく知られており、また本発明とは直接関係しないので、その詳細な構成は省略する。   Although the embodiment of the present invention has been described in detail above, the mobile terminal, mobile base station, and wireless LAN AP in FIG. 2 are well known to those skilled in the art and are not directly related to the present invention. The detailed configuration is omitted.

次に、本発明にかかる携帯端末のスキャン周期の制御方法について、図３のフローチャートを参照しながら説明する。   Next, a method for controlling the scan cycle of the mobile terminal according to the present invention will be described with reference to the flowchart of FIG.

設定したタイマの割り込みが発生したときに、同図の制御フローを起動する。スタート４０１の後、処理４０２で無線ＬＡＮのＡＰのスキャンを行う。次に、処理４０３でスキャン結果が無線ＬＡＮの圏内であるか否かを判断する。処理４０３で無線ＬＡＮの圏内の場合には、処理４０６で帰属した基地局をメモリ１３０のデータベースに圏内側のグループとして登録する。これは、例えば、帰属した基地局が、図２に示した基地局Ｃ３０３の場合である。   When the set timer interrupt occurs, the control flow in the figure is started. After the start 401, the wireless LAN AP is scanned in a process 402. Next, in process 403, it is determined whether the scan result is within the wireless LAN area. If it is determined in step 403 that the wireless LAN is within range, the base station belonging in step 406 is registered in the database of the memory 130 as a group on the side of the region. This is the case, for example, when the belonging base station is the base station C303 shown in FIG.

一方、処理４０３において、無線ＬＡＮの圏外の場合には、処理４０４で帰属した基地局が無線ＬＡＮの圏内で発見した基地局であるか否かをデータベースを検索し、処理４０４で無線ＬＡＮ圏内で発見した基地局（例えば、図２の基地局Ｂ３０２）の場合には、処理４０８においてスキャン周期を短いタイマ値で図３の制御フローを再起動するように設定する。   On the other hand, if the wireless LAN is out of the wireless LAN area in the process 403, the database is searched to determine whether the base station belonging in the process 404 is a base station found in the wireless LAN area. In the case of the discovered base station (for example, the base station B302 in FIG. 2), in the process 408, the scan cycle is set to be restarted with a short timer value.

また、処理４０４で無線ＬＡＮ圏内で発見された基地局以外（例えば、図２の基地局Ａ３０１）の場合であって、処理４０５でデータベースに登録されていない場合には、圏外側のグループとして登録し、処理４０７でスキャン周期を長いタイマ値で図３の制御フローを再起動するように設定する。   If it is a base station other than the base station discovered in the wireless LAN area in the process 404 (for example, the base station A301 in FIG. 2) and is not registered in the database in the process 405, it is registered as a group outside the area. Then, in step 407, the scan cycle is set to be restarted with a long timer value.

上記のように、本発明では、無線ＬＡＮの圏外でのスキャン周期を長くすることで携帯端末の待ち受け電力低減を行う効果がある。また、上記実施の形態においては、無線ＬＡＮの圏外でのスキャン周期を長くしたが、スキャン自体を行わないようにすることも可能であり、その場合には、携帯端末の待ち受け電力をさらに低減することができる。   As described above, the present invention has an effect of reducing the standby power of the mobile terminal by increasing the scan period outside the wireless LAN area. In the above-described embodiment, the scan period outside the wireless LAN range is extended, but it is also possible not to perform the scan itself, in which case the standby power of the mobile terminal is further reduced. be able to.

尚、上記実施の形態においては、携帯電話機能と、無線ＬＡＮ機能を有する携帯端末に本発明を適用した場合を例にとって説明したが、無線ＬＡＮと携帯電話との組み合わせのみならず、「ＰＤＣとＷＣＤＭＡ」、「ＷＣＤＭＡとＧＳＭ」などのように、携帯電話同士でも同様の効果を発揮する。   In the above embodiment, the case where the present invention is applied to a mobile terminal having a mobile phone function and a wireless LAN function has been described as an example. However, not only a combination of a wireless LAN and a mobile phone but also “PDC and Similar effects can be achieved with mobile phones such as “WCDMA” and “WCDMA and GSM”.

次に、本発明にかかる携帯端末の第２の実施の形態について説明する。   Next, a second embodiment of the portable terminal according to the present invention will be described.

携帯端末が帰属した基地局毎に無線ＬＡＮの圏内率(圏内時間÷全時間)を計算し、これをデータベースに登録する。スキャン周期は、この圏内率が低いときには長周期とし、圏内率が高いときには短周期とする。これにより、圏外か圏内かで一律に制御する場合に比較して、緩やかなスキャン周期の変化を実現することができる。   The wireless LAN coverage ratio (range time ÷ total time) is calculated for each base station to which the mobile terminal belongs, and this is registered in the database. The scan cycle is a long cycle when the coverage rate is low, and a short cycle when the coverage rate is high. As a result, it is possible to realize a gradual change in the scan cycle as compared with a case where the control is uniformly performed within or outside the service area.

次に、本発明にかかる携帯端末の第３の実施の形態について説明する。   Next, a third embodiment of the portable terminal according to the present invention will be described.

上記の例では無線ＬＡＮの圏内率を圏内時間÷全時間として計算したが、この場合ネットワークの構成の変更、例えば、住居を移転したときなどでは、過去の状態に影響を受ける。そこで、これを防ぐため、圏内率の計算を、過去の圏内率×λ＋現在の単位時間当たりの圏内率×（１−λ）として行う。ここでλは１未満の実数とする。   In the above example, the coverage ratio of the wireless LAN is calculated as the coverage time divided by the total time, but in this case, when the network configuration is changed, for example, when the residence is moved, it is affected by the past state. Therefore, in order to prevent this, the coverage ratio is calculated as the past coverage ratio × λ + the coverage ratio per unit time × (1−λ). Here, λ is a real number less than 1.

本発明にかかる携帯端末の一実施の形態を示す構成図である。It is a block diagram which shows one Embodiment of the portable terminal concerning this invention. 図１の携帯端末の動作を説明するための概略図である。It is the schematic for demonstrating operation | movement of the portable terminal of FIG. 図１の携帯端末のスキャン周期を制御する動作を説明するためのフローチャートである。3 is a flowchart for explaining an operation for controlling a scan cycle of the mobile terminal of FIG. 1. 従来の２方式以上の無線通信機能を有する携帯電話の動作を説明するための概略図である。It is the schematic for demonstrating operation | movement of the mobile telephone which has the radio | wireless communication function of the conventional 2 systems or more.

符号の説明Explanation of symbols

１０１ 携帯端末
１０１Ａ 無線ＬＡＮのＡＰの圏内に位置する携帯端末
１０１Ｂ 携帯基地局Ｃの圏内に位置する携帯端末
１０１Ｃ 携帯基地局Ａの圏内に位置する携帯端末
１０１Ｄ 携帯基地局Ｂの圏内に位置する携帯端末
１１０ ＴＲＸ
１２０ ＣＰＵ
１３０ メモリ
２０１ 無線ＬＡＮのＡＰ
２０２ 無線ＬＡＮのＡＰの圏内
３０１ 携帯基地局Ａ
３０２ 携帯基地局Ｂ
３０３ 携帯基地局Ｃ
３０４ 携帯基地局Ａの圏内
３０５ 携帯基地局Ｂの圏内
３０６ 携帯基地局Ｃの圏内
４０１ 制御フローの開始
４０２ 無線ＬＡＮのＡＰをスキャンする
４０３ 携帯端末が無線ＬＡＮの圏内か否かを判断する
４０４ 帰属した携帯基地局が無線ＬＡＮの圏内で検出した基地局（ＩＤ）かを判断する
４０５ 帰属した携帯基地局Ａを無線ＬＡＮ圏外で登録する
４０６ 帰属した携帯基地局Ｃを無線ＬＡＮ圏内で登録する
４０７ データベースに記憶した圏外の長いタイマ値でタイマを起動する
４０８ データベースに記憶した圏外の短いタイマ値でタイマを起動する
４１０ 制御フローの終了 101 mobile terminal 101A mobile terminal 101B located within the AP of the wireless LAN 101B mobile terminal located within the mobile base station C mobile terminal 101D mobile terminal located within the mobile base station A mobile phone located within the mobile base station B Terminal 110 TRX
120 CPU
130 Memory 201 Wireless LAN AP
202 Within range of wireless LAN AP 301 Mobile base station A
302 Mobile base station B
303 Mobile base station C
304 Within range of mobile base station A 305 Within range of mobile base station B 306 Within range of mobile base station C 401 Start of control flow 402 Scan AP of wireless LAN 403 Determine whether mobile terminal is within range of wireless LAN 404 Attribution It is determined whether the mobile base station detected is a base station (ID) detected within the wireless LAN area 405 The mobile base station A to which it belongs is registered outside the wireless LAN area 406 The mobile base station C to which it belongs is registered 407 within the wireless LAN area 408 Start timer with long out-of-service timer value stored in database 408 Start timer with out-of-service short timer value stored in database 410 End of control flow

Claims (6)

２方式以上の無線通信機能を備える携帯端末装置の制御方法であって、
第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏内として記憶し、
前記第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏外として記憶し、
前記携帯端末装置が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末装置を走査し、
前記携帯端末装置が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末装置を走査するか、走査を行わないことを特徴とする携帯端末装置の制御方法。 A method for controlling a portable terminal device having a wireless communication function of two or more methods,
The service area of the base station in the second radio communication system adjacent to the service area of the base station in the first radio communication system is searched, and the service area of the searched base station is searched for in the base station in the first radio communication system Remember as the sphere of
The service area of the base station in the second radio communication system not adjacent to the service area of the base station in the first radio communication system is searched, and the service area of the searched base station is searched for the base in the first radio communication system Remember as out of service area,
When the mobile terminal device is located within the area, the mobile terminal device is scanned at a predetermined time interval from the base station in the first wireless communication system,
When the mobile terminal device is located outside the service area, the mobile terminal device is scanned at a time interval longer than the predetermined time interval from the base station in the first wireless communication system, or scanning is not performed. A method for controlling a portable terminal device. 前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことを特徴とする請求項１に記載の携帯端末装置の制御方法。   2. The method of controlling a mobile terminal device according to claim 1, wherein the two or more wireless communication functions include a mobile phone function and a wireless LAN function. ２方式以上の無線通信機能を備える携帯端末装置であって、
第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局、及び隣接しない第２の無線通信方式における基地局のサービスエリアを検索する検索部と、
該検索部によって検索された前記隣接する第２の無線通信方式における基地局を圏内として、前記検索部によって検索された前記隣接しない第２の無線通信方式における基地局を圏外として記憶する記憶部と、
前記携帯端末装置が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末装置を走査し、前記携帯端末装置が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末装置を走査するか、走査を行わない走査部とを備えることを特徴とする携帯端末装置。 A mobile terminal device having two or more wireless communication functions,
A search unit for searching for a base station in the second wireless communication system adjacent to the service area of the base station in the first wireless communication system and a service area of the base station in the second wireless communication system that is not adjacent;
A storage unit for storing, as a range, a base station in the adjacent second wireless communication method searched by the search unit, and a base station in the non-adjacent second wireless communication method searched by the search unit as out of range; ,
When the mobile terminal device is located within the range, the mobile terminal device is scanned at a predetermined time interval from the base station in the first wireless communication method, and the mobile terminal device is located outside the range Comprises a scanning unit that scans the mobile terminal device at a time interval longer than the predetermined time interval from a base station in the first wireless communication system or does not perform scanning. . 前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことを特徴とする請求項３に記載の携帯端末装置。   The mobile terminal device according to claim 3, wherein the wireless communication function of the two or more systems includes a mobile phone function and a wireless LAN function. ２方式以上の無線通信機能を備える携帯端末装置を制御するためのプログラムであって、
第１の無線通信方式における基地局のサービスエリアに隣接する第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏内として記憶するステップと、
前記第１の無線通信方式における基地局のサービスエリアに隣接しない第２の無線通信方式における基地局のサービスエリアを検索し、検索された基地局のサービスエリアを前記第１の無線通信方式における基地局の圏外として記憶するステップと、
前記携帯端末装置が前記圏内に位置する場合には、前記第１の無線通信方式における基地局から所定の時間間隔で該携帯端末装置を走査するステップと、
前記携帯端末装置が前記圏外に位置する場合には、前記第１の無線通信方式における基地局から前記所定の時間間隔よりも長い時間間隔で該携帯端末装置を走査するか、走査を行わないようにするステップとを備えることを特徴とする制御プログラム。 A program for controlling a mobile terminal device having two or more wireless communication functions,
The service area of the base station in the second radio communication system adjacent to the service area of the base station in the first radio communication system is searched, and the service area of the searched base station is searched for in the base station in the first radio communication system Memorizing as a range of
The service area of the base station in the second radio communication system not adjacent to the service area of the base station in the first radio communication system is searched, and the service area of the searched base station is searched for the base in the first radio communication system Storing as out of service area of the station;
When the mobile terminal device is located in the area, scanning the mobile terminal device at a predetermined time interval from a base station in the first wireless communication method;
When the mobile terminal device is located outside the service area, the mobile terminal device is scanned at a time interval longer than the predetermined time interval from the base station in the first wireless communication system, or is not scanned. A control program comprising the steps of: 前記２方式以上の無線通信機能は、携帯電話機能と、無線ＬＡＮ機能とを含むことを特徴とする請求項５に記載の制御プログラム。   6. The control program according to claim 5, wherein the two or more wireless communication functions include a mobile phone function and a wireless LAN function.
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