JPH1098759A - Mobile communication system - Google Patents
Mobile communication systemInfo
- Publication number
- JPH1098759A JPH1098759A JP8250109A JP25010996A JPH1098759A JP H1098759 A JPH1098759 A JP H1098759A JP 8250109 A JP8250109 A JP 8250109A JP 25010996 A JP25010996 A JP 25010996A JP H1098759 A JPH1098759 A JP H1098759A
- Authority
- JP
- Japan
- Prior art keywords
- base station
- station
- mobile
- base
- communication system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は移動体通信方式に関
し、特にハンドオフ（通信中のチャネル切替え）を実現
する移動体通信方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication system, and more particularly, to a mobile communication system for realizing handoff (channel switching during communication).
【０００２】[0002]
【従来の技術】従来の移動体通信方式では、移動局が無
線ゾーンを移動する時に、移動局自身で各基地局の電界
強度を判定してハンドオーバ（通信中のセル切替え）の
処理を要求することにより、移動局側において瞬時に新
しい通話チャネルの利用を可能にしていた。2. Description of the Related Art In a conventional mobile communication system, when a mobile station moves in a radio zone, the mobile station itself determines the electric field strength of each base station and requests a handover (cell switching during communication) process. As a result, the mobile station can instantaneously use a new communication channel.
【０００３】従来のこの種の移動体通信方式の一例とし
て特開平３−２６８６９７号公報に所載の「移動無線通
信方式」を挙げることができる。As one example of a conventional mobile communication system of this type, there is a "mobile radio communication system" described in Japanese Patent Application Laid-Open No. 3-26897.
【０００４】図４は従来の移動体通信方式の一例を示す
ブロック図であり、上記公報における動作について図４
を参照して説明する。FIG. 4 is a block diagram showing an example of a conventional mobile communication system.
This will be described with reference to FIG.
【０００５】移動局５は通信中の基地局６２の受信電界
強度と復調信号の符号誤り率とにより無線回線品質を常
にモニタし、基地局６２のサービスエリアＳＥ７２から
基地局６１のサービスエリアＳＤ７１へのゾーン移動に
より受信電界強度または符号誤り率が所定範囲外に劣化
したことを検出したとき、自局が使用していない空タイ
ムスロットを使用して移動局５自身が周囲の各基地局６
１，６３からのゾーンに対応した周波数の信号の電界強
度を順次検出して比較し、そのうち最強の電界強度の信
号を決定し、この決定した信号の周波数情報を通信中の
基地局６２に送ってハンドオーバ要求し、通信中の基地
局６２がこのハンドオーバ要求を受けて基地局制御装置
８へハンドオーバ要求メッセージを送る。これにより、
ハンドオーバが行われていた。[0005] The mobile station 5 constantly monitors the radio channel quality based on the received electric field strength of the base station 62 during communication and the bit error rate of the demodulated signal, and moves from the service area SE72 of the base station 62 to the service area SD71 of the base station 61. When the mobile station 5 detects that the received electric field strength or the bit error rate has degraded out of the predetermined range due to the zone movement of the mobile station 5, the mobile station 5 itself uses the empty time slot not used by the own station.
The electric field strengths of the signals of the frequencies corresponding to the zones from 1, 63 are sequentially detected and compared, the signal of the strongest electric field strength is determined, and the frequency information of the determined signal is transmitted to the base station 62 in communication. The base station 62 during communication sends a handover request message to the base station control device 8 in response to the handover request. This allows
A handover was taking place.
【０００６】[0006]
【発明が解決しようとする課題】この従来の技術におい
てハンドオフを実現しようとしたときには、移動局側で
電界強度などから回線品質の劣化を検出した後にハンド
オフ要求を開始していたので、通話品質が劣化する恐れ
があるという問題点があった。When handoff is to be realized in this prior art, a handoff request is started after the mobile station detects line quality deterioration based on electric field strength or the like. There is a problem that there is a risk of deterioration.
【０００７】また、基地局から送出される電界強度によ
り最適な基地局を選択しているため、現在の基地局の電
界強度が弱まったのを検出してから他の各基地局からの
電界強度などを比較して最適な基地局を選出し、その基
地局に対してハンドオフ要求を行う必要があるので、電
界強度が劣化していたためハンドオフを実現しようとし
たとき、最適な基地局の切替えまでに時間がかかるとい
う問題点があった。Further, since the optimum base station is selected according to the electric field strength transmitted from the base station, the electric field strength from each of the other base stations is detected after detecting that the current electric field strength of the base station has become weak. It is necessary to select the most suitable base station by comparing the base stations, etc., and make a handoff request to the base station. It takes time.
【０００８】本発明の目的は、移動局の位置情報と基地
局データベースの基地局情報とから最適な基地局を予測
選択してハンドオフ要求を開始することにより、通話品
質を劣化させることなく、高速なハンドオフを行うこと
が可能な移動体通信方式を提供することにある。An object of the present invention is to predict and select an optimal base station from position information of a mobile station and base station information in a base station database and start a handoff request, thereby enabling high-speed communication without deteriorating communication quality. It is an object of the present invention to provide a mobile communication system capable of performing a simple handoff.
【０００９】[0009]
【課題を解決するための手段】本発明によれば、複数の
基地局サービスエリア間を移動する移動局と、この移動
局からのハンドオフ要求を受信したとき前記移動局と接
続している基地局を切り替える基地局制御装置とから構
成される移動体通信方式において、前記移動局は自局の
位置および基地局情報のデータベース内の基地局サービ
スエリアから次の基地局を選出する基地局選択手段を備
え、前記基地局は前記基地局選択手段により選択され移
動体が前記データベース内の基地局サービスエリア分解
点に達した時に前記ハンドオフ要求を前記基地局制御装
置に伝えるハンドオフ要求手段を備えることを特徴とす
る移動体通信方式が得られる。According to the present invention, a mobile station moving between a plurality of base station service areas and a base station connected to the mobile station when receiving a handoff request from the mobile station And a base station control device for switching the base station, wherein the mobile station selects base station selection means for selecting a next base station from a base station service area in a database of its own position and base station information. The base station further comprises handoff request means for transmitting the handoff request to the base station controller when the mobile station selected by the base station selection means and the mobile reaches the base station service area decomposition point in the database. Is obtained.
【００１０】また、前記移動局は自局の位置を検出する
位置検出手段を備えることを特徴とする移動体通信方式
が得られる。[0010] Also, the mobile station is provided with position detecting means for detecting the position of the mobile station, thereby obtaining a mobile communication system.
【００１１】さらに、前記移動局は前記自局の位置情報
を外部から受信する位置情報受信手段を備えることを特
徴とする移動体通信方式が得られる。Further, the mobile communication system is characterized in that the mobile station includes position information receiving means for receiving the position information of the mobile station from outside.
【００１２】そして、前記移動局はＧＰＳアンテナで受
信したＧＰＳ信号により前記自局の現在位置の検出を行
う自局位置検出部と、前記各基地局のサービス設定区域
を含む基地局情報を格納する基地局データベースと、自
局の位置検出および各基地局のサービスエリアの判定に
使用する地図データを格納している地図データ部と、前
記自局の位置を記録しておくメモリと、前記自局の位置
および基地局サービスエリアから最適な基地局を選択す
る基地局選択部とを備えることを特徴とする移動体通信
方式が得られる。[0012] The mobile station stores a local station position detecting unit for detecting a current position of the local station based on a GPS signal received by a GPS antenna, and base station information including a service setting area of each base station. A base station database, a map data section storing map data used for detecting the position of the own station and determining the service area of each base station, a memory for recording the position of the own station, And a base station selecting unit for selecting an optimum base station from the position and the base station service area.
【００１３】そしてまた、前記移動局はＧＰＳアンテナ
を通して前記自局の現在位置情報を受信する自局位置情
報受信部と、前記各基地局のサービス設定区域を含む基
地局情報を格納する基地局データベースと、自局の位置
検出および各基地局のサービスエリアの判定に使用する
地図データを格納している地図データ部と、前記自局の
位置を記録しておくメモリと、前記自局の位置および基
地局サービスエリアから最適な基地局を選択する基地局
選択部とを備えることを特徴とする移動体通信方式が得
られる。The mobile station receives a current location information of the mobile station via a GPS antenna, and a base station database storing base station information including a service setting area of each base station. And a map data section storing map data used for detecting the position of the own station and determining the service area of each base station, a memory for recording the position of the own station, the position of the own station, And a base station selection unit for selecting an optimum base station from a base station service area.
【００１４】[0014]
【発明の実施の形態】次に、本発明について図面を参照
して説明する。Next, the present invention will be described with reference to the drawings.
【００１５】図１（ａ），（ｂ）は本発明の一実施形態
における移動局の第１，第２の例を示すブロック図、図
２は本発明の一実施形態を示す移動体通信システムのシ
ステムブロック図である。FIGS. 1A and 1B are block diagrams showing first and second examples of a mobile station according to an embodiment of the present invention, and FIG. 2 is a mobile communication system showing an embodiment of the present invention. It is a system block diagram of.
【００１６】まず、図２を参照すると、本実施形態の移
動体通信システム１００は、複数の基地局２１，２２，
２３のサービスエリア（ＳＡ，ＳＢ，ＳＣ）３１，３
２，３３間を移動する移動局１と、この移動局１からの
ハンドオフ要求を受信したとき移動局１と接続している
基地局を切り替える基地局制御装置４とから構成されて
いる。First, referring to FIG. 2, a mobile communication system 100 according to this embodiment includes a plurality of base stations 21, 22,
23 service areas (SA, SB, SC) 31, 3
The mobile station 1 includes a mobile station 1 that moves between the mobile stations 1 and 33 and a base station controller 4 that switches a base station connected to the mobile station 1 when receiving a handoff request from the mobile station 1.
【００１７】そして、移動局１が基地局２２と接続中に
サービスエリアＳＢ３２から基地局２１のサービスエリ
アＳＡ３１に移動しようとしたとき、移動局１は自局の
位置および各基地局のサービスエリアのデータベースを
参照して最適な基地局を選出し、この選出基地局からそ
の基地局データを基地局制御装置４に送出することによ
り、接続先の基地局を基地局２２から基地局２１に切り
替える。When the mobile station 1 attempts to move from the service area SB32 to the service area SA31 of the base station 21 while being connected to the base station 22, the mobile station 1 determines its own location and the service area of each base station. An optimal base station is selected with reference to the database, and the selected base station sends the base station data to the base station control device 4, thereby switching the connection destination base station from the base station 22 to the base station 21.
【００１８】次に、図１（ａ）を参照すると、移動局１
ａは基地局へデータを送信する送信部１１と、基地局か
らデータを受信する受信部１２と、送信部１１および受
信部１２の制御を行う送受信制御部１３と、ＧＰＳ（Ｇ
ｌｏｂａｌ ｐｏｓｉｔｉｏｎｉｎｇ ｓｙｓｔｅｍ）
信号を受信するためのＧＰＳアンテナ１０と、ＧＰＳア
ンテナ１０で受信した信号により移動局１ａの現在位置
の検出を行う自局位置検出部１８と、各基地局のサービ
ス設定区域などの基地局情報を格納する基地局データベ
ース１４と、自局の位置検出および各基地局のサービス
エリアの判定に使用する地図データを格納している地図
データ部１７と、自局の位置を記録しておくためのメモ
リ１６と、自局の位置および基地局サービスエリアから
最適な基地局を選択する基地局選択部１５とを備えてい
る。Next, referring to FIG. 1A, the mobile station 1
a is a transmission unit 11 for transmitting data to the base station, a reception unit 12 for receiving data from the base station, a transmission / reception control unit 13 for controlling the transmission unit 11 and the reception unit 12, and a GPS (G
local positioning system)
A GPS antenna 10 for receiving a signal, a local station position detecting unit 18 for detecting the current position of the mobile station 1a based on a signal received by the GPS antenna 10, and base station information such as a service setting area of each base station. A base station database 14 to be stored, a map data unit 17 storing map data used for position detection of the own station and determination of a service area of each base station, and a memory for recording the position of the own station 16 and a base station selecting unit 15 for selecting an optimum base station from its own position and base station service area.
【００１９】なお、図１（ｂ）は移動局の第２の例を示
しているが、第１の例と同じ構成要素には図１（ａ）と
同じ参照符号を付している。FIG. 1B shows a second example of the mobile station, and the same components as those in the first example are denoted by the same reference numerals as in FIG. 1A.
【００２０】すなわち、第２の例の移動局１ｂは、第１
の例の移動局１ａにおける自局位置検出部１８の代わり
に外部から自局位置情報を受信する自局位置情報受信部
１９を備えている点だけが異なっている。That is, the mobile station 1b of the second example has the first
The only difference is that the mobile station 1a of the example has an own station position information receiving section 19 for receiving own station position information from the outside instead of the own station position detecting section 18 in the mobile station 1a.
【００２１】次に、本実施形態の移動体通信システムの
ハンドオフ時の動作について図３を併用して説明する。Next, an operation at the time of handoff of the mobile communication system of the present embodiment will be described with reference to FIG.
【００２２】図３は図１におけるハンドオフ時の動作を
説明するための図である。FIG. 3 is a diagram for explaining the operation at the time of handoff in FIG.
【００２３】まず、移動局１（１ａ）内の基地局データ
ベース１４に基地局２１のサービスエリア設定区域ｓａ
２５および基地局２２のサービスエリア設定区域ｓｂ２
６を設定しておく。First, the service area setting area sa of the base station 21 is stored in the base station database 14 in the mobile station 1 (1a).
25 and the service area setting area sb2 of the base station 22
6 is set in advance.
【００２４】移動局１が基地局２２のサービスエリアＳ
Ｂ３２内で通話中に基地局２１のサービスエリアＳＡ３
１に移動していくとき、一般にＤ地点において移動局１
が基地局２２のサービスエリアＳＢ３２から外れる前
に、Ｂ地点で基地局２１のサービスエリアＳＡ３１に入
り、基地局２２のサービスエリア設定区域ｓｂ２６と基
地局２１のサービスエリア設定区域ｓａ２５との境界線
（Ａ−Ａ線で示す）上のＣ地点を通ってＤ地点を過ぎる
とサービスエリアＳＡ３１のみに在圏することになる。The mobile station 1 has a service area S of the base station 22.
The service area SA3 of the base station 21 during a call in B32
When moving to the mobile station 1, the mobile station 1 is generally located at the point D.
Before moving out of the service area SB32 of the base station 22, the user enters the service area SA31 of the base station 21 at the point B, and the boundary line between the service area setting area sb26 of the base station 22 and the service area setting area sa25 of the base station 21 ( After passing point D through point C on the line AA), the vehicle will be located only in the service area SA31.
【００２５】移動局１は常に自局の位置をＧＳＰアンテ
ナ１０を通して自局位置検出部１８で検出しておき、そ
の位置データを基地局選択部１５を通してメモリ１６に
登録しておく。The mobile station 1 always detects its own position through the GSP antenna 10 at its own position detecting section 18 and registers its position data in the memory 16 through the base station selecting section 15.
【００２６】移動局１のこの現在位置が基地局データベ
ース１４内に設定してある基地局サービスエリア設定区
域ｓｂ２６内にあれば、移動局１は基地局２２と無線接
続を行う。If the current position of the mobile station 1 is within the base station service area setting area sb26 set in the base station database 14, the mobile station 1 establishes a wireless connection with the base station 22.
【００２７】次に、移動局１が移動して基地局２２のサ
ービスエリアＳＢ３２から基地局２１のサービスエリア
ＳＡ３１に入ろうとしたとき、移動局１では基地局デー
タベース１４内の基地局２１，２２のサービスエリア設
定区域ｓａ２５，ｓｂ２６と自局位置検出部１８で検出
された自局位置データおよびメモリ１６に登録されてい
る以前の移動局１の位置データとにより、基地局選択部
１５は次の基地局を選択し、その基地局への切替タイミ
ングを算出する。Next, when the mobile station 1 moves and attempts to enter the service area SA31 of the base station 21 from the service area SB32 of the base station 22, the mobile station 1 checks the base stations 21 and 22 in the base station database 14. Based on the service area setting areas sa25 and sb26, the own station position data detected by the own station position detecting section 18 and the position data of the previous mobile station 1 registered in the memory 16, the base station selecting section 15 sets the next base station. A station is selected, and the switching timing to the base station is calculated.
【００２８】ここで選択された次の基地局および算出さ
れた基地局切替タイミングのデータを移動局が在圏する
基地局２２または２１を通して基地局制御装置４に送信
すると、基地局制御装置４は受信した切替タイミングで
移動局１と接続される基地局を基地局２２から基地局２
１に切り替える。When the data of the next selected base station and the calculated base station switching timing are transmitted to the base station controller 4 through the base station 22 or 21 in which the mobile station is located, the base station controller 4 The base station connected to the mobile station 1 at the received switching timing is changed from the base station 22 to the base station 2
Switch to 1.
【００２９】[0029]
【発明の効果】以上説明したように本発明は、複数の基
地局サービスエリア間を移動する移動局と、この移動局
からのハンドオフ要求を受信したとき移動局と接続して
いる基地局を切り替える基地局制御装置とから構成され
る移動体通信方式において、移動局は自局の位置および
基地局情報のデータベース内の基地局サービスエリアか
ら次の基地局を選出する基地局選択手段を備え、基地局
は基地局選択手段により選択され移動体がデータベース
内の基地局サービスエリア分解点に達した時にハンドオ
フ要求を基地局制御装置に伝えるハンドオフ要求手段を
備えることにより、また、上記移動局は自局の位置を検
出する位置検出手段、または自局の位置情報を外部から
受信する位置情報受信手段を備えることにより、そして
その実施形態としては、上記移動局はＧＰＳアンテナで
受信したＧＰＳ信号により自局の現在位置の検出を行う
自局位置検出部またはＧＰＳアンテナを通して自局の現
在位置情報を受信する自局位置情報受信部と、各基地局
のサービス設定区域を含む基地局情報を格納する基地局
データベースと、自局の位置検出および各基地局のサー
ビスエリアの判定に使用する地図データを格納している
地図データ部と、自局の位置を記録しておくメモリと、
自局の位置および基地局サービスエリアから最適な基地
局を選択する基地局選択部とを備えることにより、基地
局からの電界強度が劣化する以前にハンドオフ要求を行
うことができ、また、常に他の基地局からの電界強度を
判定する必要がないので、通話品質を劣化させずにハン
ドオフ要求を行うことができるという効果を有する。As described above, the present invention switches between a mobile station moving between a plurality of base station service areas and a base station connected to the mobile station when receiving a handoff request from the mobile station. In a mobile communication system including a base station control device, the mobile station includes base station selection means for selecting a next base station from a base station service area in a database of its own position and base station information. The station is provided with handoff request means for transmitting a handoff request to the base station controller when the mobile reaches the base station service area decomposition point in the database selected by the base station selecting means. By providing position detecting means for detecting the position of the mobile station, or position information receiving means for receiving the position information of the own station from the outside, and The mobile station includes a local station position detecting unit that detects the current position of the local station based on a GPS signal received by a GPS antenna or a local station position information receiving unit that receives the current position information of the local station through a GPS antenna. A base station database storing base station information including a service setting area of the base station; a map data section storing map data used for position detection of the own station and determination of a service area of each base station; Memory for recording the position of
By providing a base station selecting unit for selecting an optimal base station from the position of the own station and the base station service area, a handoff request can be made before the electric field strength from the base station is degraded, and Since there is no need to determine the electric field strength from the base station, there is an effect that the handoff request can be made without deteriorating the communication quality.
【図１】（ａ），（ｂ）は本発明の一実施形態における
移動局の第１，第２の例を示すブロック図である。FIGS. 1A and 1B are block diagrams showing first and second examples of a mobile station according to an embodiment of the present invention.
【図２】本発明の一実施形態を示す移動体通信システム
のシステムブロック図である。FIG. 2 is a system block diagram of a mobile communication system according to an embodiment of the present invention.
【図３】図１におけるハンドオフ時の動作を説明するた
めの図である。FIG. 3 is a diagram for explaining an operation at the time of handoff in FIG. 1;
【図４】従来の移動体通信方式の一例を示すブロック図
である。FIG. 4 is a block diagram showing an example of a conventional mobile communication system.
１，１ａ，１ｂ，５ 移動局 ４，８ 基地局制御装置 １０ ＧＰＳアンテナ １１ 送信部 １２ 受信部 １３ 送受信制御部 １４ 基地局データベース １５ 基地局選択部 １６ メモリ １７ 地図データ部 １８ 自局位置検出部 １９ 自局位置情報受信部 ２１，２２，２３，６１，６２，６３ 基地局 ２５，２６ 基地局２１，２２のサービスエリア設定
区域ｓａ，ｓｂ ３１，３２，３３ 基地局２１，２２，２３のサービ
スエリアＳＡ，ＳＢ，ＳＣ ７１，７２，７３ 基地局６１，６２，６３のサービ
スエリアＳＤ，ＳＥ，ＳＦ １００ 移動体通信システム1, 1a, 1b, 5 Mobile station 4, 8 Base station controller 10 GPS antenna 11 Transmitter 12 Receiver 13 Transmitter / receiver controller 14 Base station database 15 Base station selector 16 Memory 17 Map data section 18 Own station position detector 19 own-station position information receiving unit 21, 22, 23, 61, 62, 63 base station 25, 26 service area setting area sa, sb 31, 32, 33 of base station 21, 22 service of base station 21, 22, 23 Areas SA, SB, SC 71, 72, 73 Service areas SD, SE, SF 100 of base stations 61, 62, 63 Mobile communication system
Claims (5)
る移動局と、この移動局からのハンドオフ要求を受信し
たとき前記移動局と接続している基地局を切り替える基
地局制御装置とから構成される移動体通信方式におい
て、前記移動局は自局の位置および基地局情報のデータ
ベース内の基地局サービスエリアから次の基地局を選出
する基地局選択手段を備え、前記基地局は前記基地局選
択手段により選択され移動体が前記データベース内の基
地局サービスエリア分解点に達した時に前記ハンドオフ
要求を前記基地局制御装置に伝えるハンドオフ要求手段
を備えることを特徴とする移動体通信方式。1. A mobile station that moves between a plurality of base station service areas, and a base station control device that switches a base station connected to the mobile station when receiving a handoff request from the mobile station. In the mobile communication system, the mobile station includes base station selecting means for selecting a next base station from a base station service area in a database of its own position and base station information, and the base station selects the base station. A mobile communication system comprising a handoff requesting means for transmitting the handoff request to the base station controller when the mobile station selected by the means reaches a base station service area decomposition point in the database.
検出手段を備えることを特徴とする請求項１記載の移動
体通信方式。2. The mobile communication system according to claim 1, wherein said mobile station includes a position detecting means for detecting a position of the mobile station.
から受信する位置情報受信手段を備えることを特徴とす
る請求項１記載の移動体通信方式。3. The mobile communication system according to claim 1, wherein said mobile station comprises a position information receiving means for receiving the position information of said mobile station from outside.
ＧＰＳ信号により前記自局の現在位置の検出を行う自局
位置検出部と、前記各基地局のサービス設定区域を含む
基地局情報を格納する基地局データベースと、自局の位
置検出および各基地局のサービスエリアの判定に使用す
る地図データを格納している地図データ部と、前記自局
の位置を記録しておくメモリと、前記自局の位置および
基地局サービスエリアから最適な基地局を選択する基地
局選択部とを備えることを特徴とする請求項１または２
記載の移動体通信方式。4. The mobile station stores a local station position detecting unit for detecting a current position of the local station based on a GPS signal received by a GPS antenna, and base station information including a service setting area of each of the base stations. A base station database, a map data section storing map data used for detecting the position of the own station and determining the service area of each base station, a memory for recording the position of the own station, And a base station selector for selecting an optimum base station from the position of the base station and the base station service area.
Mobile communication system as described.
記自局の現在位置情報を受信する自局位置情報受信部
と、前記各基地局のサービス設定区域を含む基地局情報
を格納する基地局データベースと、自局の位置検出およ
び各基地局のサービスエリアの判定に使用する地図デー
タを格納している地図データ部と、前記自局の位置を記
録しておくメモリと、前記自局の位置および基地局サー
ビスエリアから最適な基地局を選択する基地局選択部と
を備えることを特徴とする請求項１または３記載の移動
体通信方式。5. The mobile station according to claim 1, wherein said mobile station receives a current location information of said mobile station via a GPS antenna, a base station database storing base station information including a service setting area of each base station. A map data section storing map data used for detecting the position of the own station and determining the service area of each base station, a memory for recording the position of the own station, and the position and base of the own station 4. The mobile communication system according to claim 1, further comprising a base station selection unit that selects an optimum base station from a station service area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8250109A JPH1098759A (en) | 1996-09-20 | 1996-09-20 | Mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8250109A JPH1098759A (en) | 1996-09-20 | 1996-09-20 | Mobile communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1098759A true JPH1098759A (en) | 1998-04-14 |
Family
ID=17202965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8250109A Pending JPH1098759A (en) | 1996-09-20 | 1996-09-20 | Mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1098759A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11355834A (en) * | 1998-06-08 | 1999-12-24 | Nec Saitama Ltd | Communication terminal equipment |
| JP2000155163A (en) * | 1998-11-20 | 2000-06-06 | Sony Computer Entertainment Inc | Positioning system, method, and device |
| JP2002171555A (en) * | 2000-12-01 | 2002-06-14 | Kyocera Corp | Mobile radio communication terminal |
| JP2002534030A (en) * | 1998-12-21 | 2002-10-08 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Method and apparatus for transmitting location data between terminals in a wireless communication system |
| WO2002082840A1 (en) * | 2001-03-30 | 2002-10-17 | Yozan Inc. | Cellular mobile communication system and mobile station apparatus |
| KR100362441B1 (en) * | 1998-02-19 | 2002-11-23 | 코넥스안트 시스템스, 인코퍼레이티드 | Method and apparatus for positioning system assisted cellular radiotelephone handoff and dropoff |
| KR100450030B1 (en) * | 2002-03-27 | 2004-09-24 | 신 에트케 테크놀로지 컴퍼니 리미티드 | System and Method of a GPS Control System with Communication Function |
| JP2006135716A (en) * | 2004-11-08 | 2006-05-25 | Japan Radio Co Ltd | Radio communication system, radio communication apparatus, and radio base station apparatus |
| KR100594113B1 (en) | 2005-04-14 | 2006-06-30 | 삼성전자주식회사 | Effective cell reselection method of mobile terminal using gps |
| JP2006211404A (en) * | 2005-01-28 | 2006-08-10 | Mitsubishi Electric Corp | Terminal for satellite communication and management station |
| JP2008090575A (en) * | 2006-10-02 | 2008-04-17 | Honda Motor Co Ltd | Mobile robot |
| WO2011039958A1 (en) * | 2009-10-02 | 2011-04-07 | 日本電気株式会社 | Mobile communication system, control method for same, and wireless base station |
| JP2011166671A (en) * | 2010-02-15 | 2011-08-25 | Murata Machinery Ltd | Traveling carriage system |
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1996
- 1996-09-20 JP JP8250109A patent/JPH1098759A/en active Pending
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|---|---|---|---|---|
| KR100362441B1 (en) * | 1998-02-19 | 2002-11-23 | 코넥스안트 시스템스, 인코퍼레이티드 | Method and apparatus for positioning system assisted cellular radiotelephone handoff and dropoff |
| JPH11355834A (en) * | 1998-06-08 | 1999-12-24 | Nec Saitama Ltd | Communication terminal equipment |
| JP2000155163A (en) * | 1998-11-20 | 2000-06-06 | Sony Computer Entertainment Inc | Positioning system, method, and device |
| JP2002534030A (en) * | 1998-12-21 | 2002-10-08 | テレフオンアクチーボラゲット エル エム エリクソン（パブル） | Method and apparatus for transmitting location data between terminals in a wireless communication system |
| JP2002171555A (en) * | 2000-12-01 | 2002-06-14 | Kyocera Corp | Mobile radio communication terminal |
| WO2002082840A1 (en) * | 2001-03-30 | 2002-10-17 | Yozan Inc. | Cellular mobile communication system and mobile station apparatus |
| KR100450030B1 (en) * | 2002-03-27 | 2004-09-24 | 신 에트케 테크놀로지 컴퍼니 리미티드 | System and Method of a GPS Control System with Communication Function |
| JP2006135716A (en) * | 2004-11-08 | 2006-05-25 | Japan Radio Co Ltd | Radio communication system, radio communication apparatus, and radio base station apparatus |
| JP4520278B2 (en) * | 2004-11-08 | 2010-08-04 | 日本無線株式会社 | Wireless communication system, wireless communication apparatus, and wireless base station system |
| JP4575182B2 (en) * | 2005-01-28 | 2010-11-04 | 三菱電機株式会社 | Satellite communication terminal and management station |
| JP2006211404A (en) * | 2005-01-28 | 2006-08-10 | Mitsubishi Electric Corp | Terminal for satellite communication and management station |
| KR100594113B1 (en) | 2005-04-14 | 2006-06-30 | 삼성전자주식회사 | Effective cell reselection method of mobile terminal using gps |
| JP2008090575A (en) * | 2006-10-02 | 2008-04-17 | Honda Motor Co Ltd | Mobile robot |
| US8180486B2 (en) | 2006-10-02 | 2012-05-15 | Honda Motor Co., Ltd. | Mobile robot and controller for same |
| US8280313B2 (en) | 2007-11-02 | 2012-10-02 | Nec Corporation | Base station selecting method and wireless terminal device |
| US8160587B2 (en) | 2008-04-14 | 2012-04-17 | Hitachi, Ltd. | Radio access terminal, base station controller, and handoff control method in radio communication system |
| US9185645B2 (en) | 2009-02-09 | 2015-11-10 | Nec Corporation | Mobile communication system, method of controlling the same, and radio base station apparatus |
| WO2011039958A1 (en) * | 2009-10-02 | 2011-04-07 | 日本電気株式会社 | Mobile communication system, control method for same, and wireless base station |
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