JP3063822B2 - Adjacent zone information automatic generation method - Google Patents
Adjacent zone information automatic generation methodInfo
- Publication number
- JP3063822B2 JP3063822B2 JP7331840A JP33184095A JP3063822B2 JP 3063822 B2 JP3063822 B2 JP 3063822B2 JP 7331840 A JP7331840 A JP 7331840A JP 33184095 A JP33184095 A JP 33184095A JP 3063822 B2 JP3063822 B2 JP 3063822B2
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- JP
- Japan
- Prior art keywords
- base station
- zone
- radio
- radio wave
- station
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Description
【０００１】[0001]
【技術分野】この発明は、移動通信システムにおける各
ゾーンの基地局が移動局に報知する周辺ゾーン情報の生
成方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of generating peripheral zone information which is reported from a base station in each zone to a mobile station in a mobile communication system.
【０００２】[0002]
【従来の技術】移動通信システムにおいては、サービス
エリアを複数のゾーン（セル）に分割し、そのゾーンに
それぞれ無線基地局を設け、移動局は在圏するゾーンに
割当てられた周波数のチャネルを使ってそのゾーンの無
線基地局を介して他の移動局又は固定通信端末と通信を
する。移動通信システムでは、ゾーン移行により通信中
チャネル切替えを行ったり、同一ゾーン中においても受
信状態の劣化による通信中チャネル切替えを行ったり、
ゾーン移行により、一旦通信を中断した後、別の基地局
を介して通信を再開することが行われる。このような通
信中チャネル切替えや再接続形のチャネル切替えの各制
御を確実にかつ高速に行うために、移動局は在圏基地局
の周辺に存在する基地局とこれに関する情報（即ち、周
辺ゾーンのチャネル周波数）を必要とする。そのため、
各ゾーンの無線基地局はそのゾーン内の移動局に対しこ
の周辺基地局の識別コード及び／又はチャネル周波数を
報知情報として例えば制御チャネルを通して常時報知
し、それによって移動局のチャネル切り替え制御を高速
化すると共に適格なゾーン移行を行っている。この様な
周辺ゾーン情報（あるいは周辺基地局情報とも呼ぶ）を
報知する制御チャネルを止まり木チャネルと呼ぶことが
ある。2. Description of the Related Art In a mobile communication system, a service area is divided into a plurality of zones (cells), a radio base station is provided in each of the zones, and a mobile station uses a channel of a frequency allocated to a zone where the mobile station is located. And communicates with another mobile station or fixed communication terminal via the wireless base station in that zone. In a mobile communication system, a channel switching during communication is performed by zone transition, or a channel switching during communication is performed even in the same zone due to deterioration of a reception state.
Due to the zone shift, communication is temporarily interrupted and then restarted via another base station. In order to perform such control of channel switching during communication and channel switching of the reconnection type reliably and at high speed, the mobile station uses base stations existing in the vicinity of the serving base station and information related thereto (that is, peripheral zones). Channel frequency). for that reason,
The radio base station in each zone constantly notifies the mobile stations in the zone of the identification code and / or channel frequency of the peripheral base station as broadcast information through, for example, a control channel, thereby speeding up the channel switching control of the mobile station. As well as qualifying zones. A control channel that broadcasts such peripheral zone information (also referred to as peripheral base station information) may be referred to as a perch channel.
【０００３】[0003]
【発明が解決しようとする課題】運用しているサービス
エリアの拡大、縮小、エリア内の通信トラヒック分布の
変化、電波伝搬環境の変化等（周辺環境変化と呼ぶ）に
ともない基地局の移設、増設、廃止、割当チャネル周波
数の変更などが行われる。この様な変更にともない、各
基地局はその周辺基地局の使用チャネル周波数が変更さ
れた場合には、止まり木チャネルで報知すべき周辺基地
局情報を変更する必要がある。従来においては各無線基
地局（以下単に基地局と記す）において、受信装置によ
り他基地局からの電波の電界強度測定し、受信信号の解
析を行って人間がその周辺基地局の情報を収集管理し、
これをもとに報知すべき周辺基地局情報データを作成
し、この周辺基地局情報を止まり木チャネルを通してゾ
ーン内の移動局に報知していた。あるいは集約制御装置
を介して行うデータ転送などで行っていた。Problems to be Solved by the Invention The expansion and contraction of the service area being operated, the change of the communication traffic distribution in the area, the change of the radio wave propagation environment, etc. , Abolition, change of assigned channel frequency, etc. are performed. In accordance with such a change, when the used channel frequency of the peripheral base station is changed, each base station needs to change the peripheral base station information to be broadcast by the perch channel. Conventionally, in each radio base station (hereinafter simply referred to as a base station), a receiving device measures the electric field strength of radio waves from another base station, analyzes a received signal, and collects and manages information on the surrounding base stations. And
The base station information data to be broadcast was created based on this, and this surrounding base station information was broadcast to mobile stations in the zone through a perch channel. Alternatively, the data transfer is performed via an integrated control device.
【０００４】更に周辺基地局の判定を行う場合に、それ
ぞれの無線基地局についてそれらからの広い範囲にわた
る放射電波の電界強度を測定し、この測定結果に基づい
て基地局の隣接状態を判定している。従って、データの
収集に多大の労力と時間を必要とする問題があった。こ
の発明の目的は、周辺ゾーン情報を自動的に生成するこ
とが出きる方法を提供することである。[0004] Further, when determining the neighboring base stations, the electric field strength of the radiated radio wave over a wide range from each of the radio base stations is measured, and the adjacent state of the base stations is determined based on the measurement result. I have. Therefore, there has been a problem that much labor and time are required for collecting data. It is an object of the present invention to provide a method by which peripheral zone information can be generated automatically.
【０００５】[0005]
【課題を解決するための手段】この発明の基本原理によ
れば、受信されるそれぞれの周波数の電界強度を測定し
て電界強度が規定値以上であるか否かを判定すると共
に、その受信信号を解析してその信号が同一移動通信シ
ステム（即ち同じ事業者によるシステム）であるか否か
を判定し、測定された電界強度が規定値以上であり、か
つ同一通信システムであると判定された場合に、その周
波数のチャネルは周辺ゾーンのものであると判定する。
この場合、測定と解析を全て基地局で行う場合と、全て
移動局で行いその結果を基地局に報告する場合と、移動
局が測定を行って基地局に報告し、基地局で測定結果の
解析を行う場合と、移動局と基地局の両方で測定と解析
を行い、移動局は解析結果を基地局に報告する場合、等
が可能である。According to the basic principles of this [SUMMARY OF] invention, the electric field strength of the electric field intensity measured in the respective frequency to be received to determine whether a specified value or more, the reception The signal is analyzed to determine whether the signal is the same mobile communication system (that is, a system by the same operator), and it is determined that the measured electric field strength is equal to or greater than a specified value and the communication system is the same. Then, it is determined that the channel of that frequency belongs to the peripheral zone.
In this case, when the measurement and analysis are all performed at the base station, when all the measurements and analysis are performed at the mobile station and the result is reported to the base station, and when the mobile station performs the measurement and reports it to the base station, The analysis may be performed, or the measurement and analysis may be performed by both the mobile station and the base station, and the mobile station may report the analysis result to the base station.
【０００６】請求項１の発明によれば各基地局でその周
辺に存在する他基地局からの下り電波の電界強度を測定
し、その測定結果から自基地局に対する周辺基地局の下
り電波が存在するかの判定を行い、存在する場合は、そ
の電波が同じシステムで使用されているものであるかを
その移動局で受信信号の解析により判定し、その報告を
受けた基地局は、その電波の基地局が自基地局の周辺基
地局かの判定を行い、自基地局に対する周辺基地局状態
を認識して、隣接基地局一覧情報を自動的に生成、更新
する。According to the first aspect of the present invention, each base station measures the electric field strength of a downstream radio wave from another base station present in the vicinity of the base station. The mobile station determines whether the radio wave is being used by the same system by analyzing the received signal, and reports the report.
The received base station determines whether the base station of the radio wave is a base station in the vicinity of the own base station, recognizes the state of the base station in the vicinity of the base station, and automatically generates and updates the adjacent base station list information. I do.
【０００７】請求項２の発明によれば、移動局で在圈基
地局以外の基地局下り電波の電界強度を測定し、その測
定結果を在圈中の基地局へ報告し、その報告をもとに基
地局は移動局に対しその電波が同じシステムのものであ
るか解析させ、その解析結果をもとに基地局で隣接基地
局一覧情報の生成、更新を行う。According to the second aspect of the present invention, the mobile station measures the electric field strength of the radio wave transmitted from the base station other than the located base station, and reports the measurement result to the base station located in the located area. At the same time, the base station causes the mobile station to analyze whether the radio wave is of the same system, and based on the analysis result, the base station generates and updates the adjacent base station list information.
【０００８】請求項３の発明によれば、移動局で下り電
波の電界強度を測定し、自在圈基地局外の電波について
それが同じシステムのものであるか解析し、その結果か
ら在圈基地局の周辺基地局状態を認識し、周辺基地局情
報を在圈基地局へ送り、これを受信した在圈基地局から
の情報をもとに隣接基地局一覧情報の生成、更新を行
う。According to the third aspect of the present invention, the mobile station measures the electric field strength of the downstream radio wave, analyzes whether the radio wave outside the free-range base station belongs to the same system, and, based on the result, based on the result. It recognizes the state of the peripheral base station of the station, sends the peripheral base station information to the local base station, and generates and updates the adjacent base station list information based on the information from the local base station that has received the information.
【０００９】請求項４の発明によれば、ゾーン移行をす
ると移動局は移行元及び移行先の各ゾーンの基地局下り
電波の電界強度を測定し、その測定結果から移行元ゾー
ンが、移行先ゾーンの周辺であるか判定し、周辺と判定
した場合に、その判定結果を移行先基地局へ送信し、移
行先基地局でこの報告をもとに、隣接基地局一覧情報の
生成、更新を行う。According to the fourth aspect of the present invention, when the mobile station makes a zone transfer, the mobile station measures the electric field strength of the base station downlink radio wave in each of the source and destination zones. It is determined whether the area is around the zone, and when it is determined that the area is around the area, the determination result is transmitted to the destination base station. Based on this report, the destination base station generates and updates the adjacent base station list information. Do.
【００１０】請求項５の発明では請求項４における測定
結果を移行先基地局に報告して、移行先基地局で前記周
辺かどうかの判定を行い、周辺基地局一覧情報の生成、
更新を行う。請求項６の発明では請求項１の発明と請求
項２の発明とを組合せたものであり、請求項７の発明は
請求項６の発明に請求項５の発明を更に加えたものであ
る。According to a fifth aspect of the present invention, the measurement result of the fourth aspect is reported to the destination base station, and the destination base station determines whether or not the mobile station is in the vicinity.
Perform an update. The invention of claim 6 is a combination of the invention of claim 1 and the invention of claim 2 , and the invention of claim 7 is obtained by further adding the invention of claim 5 to the invention of claim 6 .
【００１１】[0011]
【発明の実施の形態及び実施例】例えば図１に示すよう
に、サービスエリアが複数のゾーンZ1，Z2，Z3…に分割
され、各ゾーンに基地局BS1，BS2，BS3… が設けられて
いる。移動局MSは在圈しているゾーンZi（i＝1,2,…）
の基地局BSi と送受信することにより他の移動局や固定
端末との通信を基地局BSi を介して行う。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS For example, as shown in FIG. 1, a service area is divided into a plurality of zones Z 1 , Z 2 , Z 3 ..., And each zone has a base station BS 1 , BS 2 , BS 3. … Is provided. The mobile station MS is located in the zone Z i (i = 1,2, ...)
Performed via the base station BS i to communicate with another mobile station or fixed terminal by transmitting and receiving the base station BS i in.
【００１２】この発明の原理によれば、周辺基地局の情
報を収集するために、各周波数の受信信号が同一システ
ムにおける周辺ゾーンの基地局からの受信信号であるか
否かを判定する。即ち、他基地局からの下り電波を受信
してその電界強度を測定すると共に、測定した受信信号
を解析してその受信信号が同一通信システム（同一事業
者によるシステム）の基地局からの信号であるか否かを
判定する。電界強度が規定値以上であり、かつ同一通信
システムに属すると判定された場合、その受信信号は周
辺基地局から送信された信号であると判定する。According to the principle of the present invention, in order to collect information on peripheral base stations, it is determined whether or not a received signal of each frequency is a received signal from a base station in a peripheral zone in the same system. That is, while receiving a downlink radio wave from another base station and measuring its electric field strength, the measured received signal is analyzed and the received signal is a signal from a base station of the same communication system (system by the same carrier). It is determined whether or not there is. When it is determined that the electric field strength is equal to or greater than the specified value and that the received signal belongs to the same communication system, it is determined that the received signal is a signal transmitted from a peripheral base station.
【００１３】受信信号が同一通信システムの基地局から
の信号である判定条件は、以下のものがある。 ・周波数がそのシステムで使用しているものと一致する
こと。 ・信号の種類（ディジタル信号か否か）が同じであり、
受信可能なこと。システムが異なると例えば同期信号の
形態が異なることから判定できる。[0013] Conditions for determining that a received signal is a signal from a base station of the same communication system include the following. • The frequency matches that used in the system.・ The signal type (digital signal or not) is the same,
Receivable. If the systems are different, for example, it can be determined from the difference in the form of the synchronization signal.
【００１４】・変調信号フォーマット（構成）が同じで
あること。 ・受信信号形ゾーンの止まり木チャネルの報知信号であ
れば、報知信号に含まれている通信システムに付与され
ている識別番号が所定のものであること。これらの条件
のうちの予め決めた１つ又は複数を満足している場合
に、同じ通信システムに属する他の基地局からの信号で
あると判定する。これらの測定と解析は、例えば下り制
御チャネルについて行う。The modulation signal format (configuration) is the same. If the broadcast signal is a perch channel of the reception signal type zone, the identification number given to the communication system included in the broadcast signal is a predetermined number. If one or more of these conditions are satisfied, it is determined that the signal is from another base station belonging to the same communication system. These measurements and analysis are performed on, for example, a downlink control channel.
【００１５】この様に、周辺基地局情報の収集のための
電界強度の測定と受信信号の解析を実施する形態とし
て、基地局単独で行う場合と、ゾーン内各移動局が行っ
て基地局に報告する場合と、基地局と移動局が共同して
行う場合が可能であり、これらについても以下のように
様々な実施形態がある。 Ａ：基地局が単独に測定、解析を行う場合。As described above, the embodiment for measuring the electric field strength and collecting the received signal for collecting the information on the peripheral base stations includes a case where the measurement is performed by the base station alone and a case where each mobile station in the zone performs the measurement to the base station. It is possible to make a report and a case where the base station and the mobile station jointly perform the report, and there are various embodiments as described below. A: When the base station performs measurement and analysis independently.
【００１６】この発明の第１の観点による方法では、図
３Ａに示すように基地局BSi(i＝1,2,3,…) は自局の送
受信装置を用いて、他基地局の放射している下り電波の
電界強度を測定する。つまりその移動通信システムに割
当てられている使用周波数帯域の全下りチャネル周波数
の電波（基地局から移動局向けの電波）を順次受信し、
その電界強度を測定する（ＳB1）。その測定結果中に、
電界強度が所定値ER以上のもの、つまり自基地局BSi に
隣接している基地局からの電波と認められる電界強度の
ものを探す（ＳB2）。所定値ER以上のものがあれば、そ
れを送受信装置で受信し、上述の判定条件に従ってその
下り電波が自基地局と共通の移動通信システムに属する
他基地局からのものであるかを解析する（ＳB3）。つま
りその基地局BSi で受信レベルが所定値以上の電波につ
いて、その電波が共通の移動通信システムの制御チャネ
ルとして受信可能であるか否かを解析する。この解析の
結果に基づき周辺基地局であるか否かの判定を行い（Ｓ
B4）、隣接基地局一覧情報を作成する（ＳB5）。In the method according to the first aspect of the present invention, as shown in FIG. 3A, the base station BS i (i = 1, 2, 3,...) The electric field strength of the descending radio wave is measured. That is, the mobile station sequentially receives radio waves (radio waves from the base station to the mobile station) of all downlink channel frequencies in the used frequency band allocated to the mobile communication system,
The electric field strength is measured (S B1 ). During the measurement results,
What field intensity is a predetermined value or more E R, i.e. Find what field strength deemed radio waves from the base stations adjacent to the base station BS i (S B2). If there is less than a predetermined value E R, receives it in transceiver, it analyzes whether the downlink radio in accordance with the determination conditions described above is from the other base stations belonging to a common mobile communication system with its own base station (S B3 ). That is, the radio wave reception level is greater than a predetermined value at the base station BS i, analyzes whether or not the radio wave can be received as a control channel common mobile communication system. Based on the result of this analysis, it is determined whether or not it is a peripheral base station (S
B4 ), and create adjacent base station list information (S B5 ).
【００１７】例えば図２の表に示すように、受信した各
下り電波周波数（チャネル）＃１，＃２，…について、
その受電界強度を記録し、電界強度が所定値ER以上のも
のについては、同一通信方式の電波であるか異方式の電
波であるかの分類を記録し、更に、所定値以上でかつ同
一方式のものは周辺（隣接）基地局であることを示す記
録（図では○印）を行い、その他は周辺基地局でないこ
とを示す記録（図では×印）を行う。For example, as shown in the table of FIG. 2, for each received downlink radio frequency (channel) # 1, # 2,.
Recording the power receiving field intensity, for those field strength is a predetermined value or more E R, either classification and recording a radio wave different methods or a radio wave of the same communication scheme, further, and the same predetermined value or more In the case of the system, recording indicating that it is a peripheral (adjacent) base station is performed (indicated by a circle in the figure), and in other cases, recording is performed indicating that it is not a peripheral base station (in the figure, by a cross).
【００１８】周辺基地局とされる数が予め決められてい
る場合は、同一方式で、かつ所定電界強度ER以上のもの
から電界強度の高い順に所定数を周辺基地局とする。こ
のようにして、各基地局BSi でその周辺基地局一覧情報
の作成、更新をする。図２の例では図１中のゾーンZ5の
基地局BS5 が作成した一覧情報であって、電界強度が所
定値以上の同一方式基地局BS1 （周波数#4），BS2 （周
波数#1），BS 4 （周波数#3）の３つが隣接基地局と判定
され、基地局BS3 （周波数#5），BS6（周波数#6）は同
一方式であるが隣接基地局と判定されず、ゾーンZ'の基
地局BS' （周波数#2） は地域的に近接しているが、方
式が異なり、隣接基地局とならない。The number of neighboring base stations is predetermined.
In the case ofRMore than
, A predetermined number in the descending order of the electric field strength is set as the peripheral base station. This
As in each base station BSiList of nearby base stations
Create and update In the example of FIG. 2, zone Z in FIG.Fiveof
Base station BSFiveIs the list information created by
Base station BS of the same system over a fixed value1 (Frequency # 4), BSTwo (Around
Wave number # 1), BS Four Three of (frequency # 3) are determined to be adjacent base stations
Base station BSThree (Frequency # 5), BS6(Frequency # 6) is the same
On the other hand, although it is an equation, it is not determined as an adjacent base station,
Local office BS '(frequency # 2) is geographically close,
The formula is different and it is not an adjacent base station.
【００１９】このような基地局一覧情報の作成は、移動
システムを作った場合、基地局を増設した場合に行うの
みならず、運用状態に入った後に定期的に行い、大きな
ビルディングや塔などが建てられたり、取りこわされた
ことにもとづく、電波環境の変化に対応させる。 Ｂ：基地局で測定し、移動局で解析 この発明の第２の観点による方法では、図３Ｂに示すよ
うに、基地局BSi で下り電波の電界強度の測定を行い
（ＳB1）、その電界強度が所定値ER以上のものであるか
の判定を行う（ＳB2）ことは図３Ａの場合と同様である
が、第２の観点では、基地局BSi はその電界強度が所定
値ER以上の周波数の電波について、これらが共通の移動
通信システムの電波であるか否かの解析要求を自ゾーン
内の移動局MSへ送信する（ＳB3）。この要求を受信した
移動局MSは例えば要求された周波数の下り電波の受信を
行い、それらの下りの制御チャネルとして受信できるか
否か、又は制御チャネルを利用してゾーン移行によるチ
ャネル切替えを行い、要求された下り電波（通話チャネ
ル）に切替えることができるかできないかなど、前述の
判定条件に従って、要求された下り電波が同一通信シス
テムのものか異システムのものか、雑音電波であるかな
どの解析を行う（ＳM1）。その移動局はこの解析結果を
得て前記要求を出した基地局BSi へ報告する（ＳM2）。
この報告を受けた基地局BSi はその報告をもとに図３Ａ
の場合と同様に周辺基地局か否かの判定を行い
（ＳB4）、更に基地局一覧情報の作成、更新をする（Ｓ
B5）。Such base station list information is created not only when a mobile system is made, when a base station is added, but also periodically after entering an operation state, and large buildings and towers are created. To respond to changes in the radio wave environment based on being built or destroyed. B: measured in the base station, the method according to the second aspect of the analysis the present invention in the mobile station, as shown in FIG. 3B, performs the measurement of the field intensity of downlink radio waves in the base station BS i (S B1), its electric field strength makes a determination of whether there are more than a predetermined value E R is (S B2) that is similar to the case of FIG. 3A, in a second aspect, the base station BS i is the electric field intensity is a predetermined value With respect to radio waves having a frequency equal to or higher than ER, an analysis request for whether or not these are radio waves of a common mobile communication system is transmitted to the mobile station MS in the own zone (S B3 ). The mobile station MS receiving this request performs, for example, reception of downlink radio waves of the requested frequency, whether or not it can be received as those downlink control channels, or performs channel switching by zone transition using the control channel, In accordance with the above-described determination condition, whether the requested downlink radio wave is from the same communication system or a different system, or whether it is a noise radio wave or not is determined in accordance with the above-described determination condition. Analysis is performed (S M1 ). The mobile station reports to the base station BS i that issued the request to obtain the analysis result (S M2).
Based on the report, the base station BSi receives the report, and
In the same way as in the case (1), it is determined whether or not it is a peripheral base station (S B4 ), and base station list information is created and updated (S B4 ).
B5 ).
【００２０】Ｃ：移動局で測定し、基地局の指定する電
波を移動局で解析 この発明の第３の観点による方法では、図３Ｃに示すよ
うに、移動局MSは、その在圈ゾーンZiの基地局BSi の下
りチャネル周波数以外の周波数の電波の電界強度の測定
を行い（ＳM1）、その測定結果を在圈基地局BSi に報告
する（ＳM2）。その報告を受けた基地局BSi はその報告
をもとに電波が到来していると判断される周波数の一覧
表を作り、この一覧表をもとに測定電界強度がその電波
の解析を行うことができるか否かの判定を行い、その解
析可能な電波について解析をする要求を移動局MSへ送信
する（ＳB1）。この要求を受けた移動局MSはその指示さ
れた電波の受信を行い、受信できる場合はその電波が同
一通信システムの基地局からの電波であるか否かの解析
を行い（ＳM3）、その解析結果を基地局BSi に報告し
（ＳM4）、基地局BSi はその報告にもとづき周辺基地局
かの判定を行い（ＳB2）、基地局一覧情報の作成、更新
を行う（ＳB3）。C: Measure at the mobile station and analyze the radio wave specified by the base station at the mobile station In the method according to the third aspect of the present invention, as shown in FIG. perform measurements of radio field intensity of the frequency other than the downlink channel frequency of the base station BS i of i (S M1), and reports the measurement result to the standing圈基land station BS i (S M2). The base station BS i that has received the report to create a list of frequency it is determined that the radio waves on the basis of the report has come, measured electric field strength on the basis of this list to perform the analysis of the radio wave The mobile station MS determines whether or not it can perform the analysis, and transmits a request to analyze the radio waves that can be analyzed to the mobile station MS (S B1 ). The mobile station MS receiving this request receives the designated radio wave, and if it can receive the signal, analyzes whether or not the radio wave is a radio wave from a base station of the same communication system (S M3 ). The analysis result is reported to the base station BS i (S M4 ), and the base station BS i determines whether it is a peripheral base station based on the report (S B2 ), and creates and updates base station list information (S B3). ).
【００２１】Ｄ：移動局で自律的に測定と解析を行い、
基地局に報告 この発明の第４の観点による方法では、図４Ａに示すよ
うに、移動局MSで周期的にその在圈ゾーンZiの基地局BS
i 以外の下り電波を順次受信してその電界強度の測定を
行い（ＳM1）、その測定結果から在圈ゾーンZiの基地局
BSi の下り電波以外の下り電波があるか否かの判定を行
う（ＳM2）。自基地局BSi の下り電波以外の下り電波が
有ればその一覧表を作り、その各電波について、同一通
信システムの制御チャネルの電波であるか否か解析を行
い（ＳM3）、その解析結果にもとづき、在圈ゾーンZiの
基地局BSi の周辺の基地局状態、つまり、周辺基地局の
数が制限されている場合はその数以下のものを周辺基地
局と判定し（ＳM4）、その情報を在圈基地局BSi に報告
する（ＳM5）。この報告を受信した基地局BSi はこの報
告をもとに、隣接基地局一覧情報の生成、更新を行う
（ＳB1）。[0021] D: analyzes and autonomously measured by the mobile stations,
In the method according to the fourth aspect of the report to the invention in the base station, as shown in FIG. 4A, the base station BS periodically its resident圈zone Z i in the mobile station MS
The downlink radio waves other than i are sequentially received and the electric field strength is measured (S M1 ). From the measurement result, the base station in the zone Z i is located.
It is determined whether there is any downlink radio wave other than the downlink radio wave of BS i (S M2 ). Make the list if there is downlink radio waves other than the downlink radio wave of the base station BS i, for each of its radio wave, analyzes whether the radio wave of the control channel of the same communication system (S M3), the analysis Based on the result, the base station status around the base station BS i in the zone Z i , that is, if the number of peripheral base stations is limited, it is determined to be less than or equal to the peripheral base station (S M4 ), and it reports the information to the standing圈基ground stations BS i (S M5). The base station BS i which has received the report on the basis of this report, the generation of adjacent base stations list information, the update is performed (S B1).
【００２２】Ｅ：ゾーン移行時に移動局で測定、解析
し、移行先基地局に報告 この発明の第５の観点による方法では、図４Ｂに示すよ
うに、移動局MSがゾーン移行時に、それまでの在圈ゾー
ン（移行元ゾーン）の基地局の下り制御チャネル電波と
新規に在圈しようとするゾーン（移行先ゾーン）の基地
局の下り制御チャネル電波の各電界強度を測定し
（ＳM1）、その測定結果から移行元ゾーンが、移行先ゾ
ーンの隣接周辺であるか否かの判定を行い（ＳM2）、隣
接周辺であると判定されると、移行元ゾーンの存在を、
移行先基地局へ通知する（ＳM3）。この報告を受信した
移行先基地局では、この報告をもとに隣接基地局一覧情
報の生成、更新を行う（ＳB1）。E: Measured and analyzed by the mobile station at the time of zone transfer, and reported to the destination base station In the method according to the fifth aspect of the present invention, as shown in FIG. The electric field strengths of the downlink control channel radio waves of the base station in the zone where the zone is located (the source zone) and the downlink control channel radio waves of the base station in the zone where the zone is to be newly located (the destination zone) are measured (S M1 ). From the measurement result, it is determined whether or not the source zone is adjacent to the destination zone (S M2 ). If it is determined that the source zone is adjacent to the destination zone, the existence of the source zone is determined.
Notify the transfer destination base station (S M3 ). The destination base station receiving this report generates and updates the adjacent base station list information based on this report (S B1 ).
【００２３】Ｆ：ゾーン移行時に移動局が測定し、移行
先基地局が解析 この発明の第６の観点による方法では、図４Ｃに示すよ
うに、移動局MSがゾーン移行時に、移行元基地局の下り
制御チャネル電波と、移行先基地局の下り制御チャネル
電波との各電界強度を測定し（ＳM1）、その測定結果を
移行先ゾーンの基地局へ報告する（ＳM2）。この報告を
受信した基地局はその報告から移行元ゾーンが移行先ゾ
ーンの隣接周辺であるかの判定を行い（ＳB1）、その判
定結果により隣接基地局一覧情報の生成、更新を行う
（ＳB2）。F: Measured by mobile station during zone transfer and analyzed by destination base station In the method according to the sixth aspect of the present invention, as shown in FIG. Of the downlink control channel radio wave and the downlink control channel radio wave of the destination base station are measured (S M1 ), and the measurement results are reported to the base station in the destination zone (S M2 ). Based on the report, the base station determines from the report whether the source zone is adjacent to the destination zone (S B1 ), and generates and updates the adjacent base station list information based on the determination result (S B1 ). B2 ).
【００２４】Ｇ：組み合わせ 第７の観点による方法では、第１乃至６の観点による方
法の任意の複数を組合せて用いる。例えば、第２の観点
による基地局での他基地局の下り電波の受信測定によ
り、移動局で解析をさせる方法と、第３の観点による移
動局MSで自律的に在圈ゾーン基地局以外の下り電波の測
定する方法とを組合せ使用する。この第７の観点による
方法に更に第６の観点による方法を組合せてもよい。G: Combination In the method according to the seventh aspect, any plural of the methods according to the first to sixth aspects are used in combination. For example, a method in which the base station according to the second aspect receives and measures downlink radio waves of other base stations to perform analysis at the mobile station, and a method according to the third aspect in which the mobile station MS autonomously selects a location other than the located zone base station. The method is used in combination with the method of measuring the downlink radio wave. The method according to the seventh aspect may be further combined with the method according to the sixth aspect.
【００２５】[0025]
【発明の効果】以上述べたこの発明の方法によれば以下
のような効果が得られる。 (a) 移動通信の運転中に測定評価を行うことができ、短
時間で周辺基地局情報の異常を検出する事ができる為に
周囲変化や無線基地局配置状況の変更に伴う隣接基地局
の変更を自動的に追従させる事ができ、集約制御装置を
介した管理制御や人為的管理が不要となる。According to the method of the present invention described above, the following effects can be obtained. (a) Measurement and evaluation can be performed during the operation of mobile communication, and anomalies in neighboring base station information can be detected in a short time. Changes can be automatically followed, and management control and manual management via the central control device are not required.
【００２６】(b) 隣接基地局となるべきでない他基地局
の下り電波の異常検出が自律的に行なわれるため、各無
線基地局に対して複数の選択可能な周波数を事前に割り
当てておけば異常発生の度合いによりこの周波数を各無
線基地局自身に切り替えさせる事ができる。 (c) 隣接基地局の変更を周囲環境の変化に追従できる為
に、設置計画が不要となる。(B) Since anomaly detection of a downlink radio wave of another base station which should not be an adjacent base station is performed autonomously, a plurality of selectable frequencies can be allocated to each radio base station in advance. This frequency can be switched by each radio base station itself depending on the degree of occurrence of abnormality. (c) Since the change of the adjacent base station can follow the change of the surrounding environment, no installation plan is required.
【００２７】(d) 無線基地局相互のゾーン（サービスエ
リア）が重なっている場合や、立体的配置等による特種
なゾーン配置、更には電波の反射や複雑な伝播経路等の
為に、距離的に遠方となるにも関わらず隣接周辺となる
基地局が発見される為、これらを含めた高精度な隣接周
辺ゾーン状態の認識が可能となる。 (e) 無線基地局は、通常自局が送信する下り電波の届く
範囲から発射される電波の電界強度を受信装置の受信限
界としている。このために、自ゾーン外から発射される
電波は、自局の受信装置の受信性能の限界を越える低い
電界強度となるために検出することは出来ない。基地局
の受信装置に於て、極端に低い電界強度を受信できる等
の受信能力の拡大は、構造上複雑となり、さらに価格の
増大と装置の大型化を引き起こす可能性が大きい。しか
し第３乃至６の観点の方法では移動局を併用することで
無線基地局の受信範囲が多目的に大幅に拡大され、精度
を向上させることが可能となる。(D) When the zones (service areas) of the radio base stations are overlapped with each other, a special zone arrangement such as a three-dimensional arrangement, and a reflection of radio waves and a complicated propagation path, the distance is not sufficient. Since a base station that is located in the vicinity of a neighboring station despite being located far away is found, it is possible to accurately recognize the state of the neighboring surrounding zone including these base stations. (e) The wireless base station normally sets the electric field strength of the radio wave emitted from the range of the downlink radio wave transmitted by itself as the reception limit of the receiving device. For this reason, radio waves emitted from outside the own zone have a low electric field intensity exceeding the limit of the receiving performance of the receiving device of the own station and cannot be detected. In the receiving device of the base station, the expansion of the receiving capability such as the ability to receive an extremely low electric field strength becomes complicated in structure, and furthermore, there is a great possibility that the cost will be increased and the device will be enlarged. However, in the methods according to the third to sixth aspects, the use of a mobile station also allows the reception range of the radio base station to be greatly expanded for multiple purposes, thereby improving the accuracy.
【００２８】つまり、例えば図５に示すように基地局BS
1 のゾーン（サービスエリア）Z1と基地局BS2 のゾーン
Z2との境界部分は重なっており、この重なり領域Aov に
位置した移動局は基地局BS1，BS2の何れからも下り電波
を受信でき、かつこの領域Ao v の移動局から発射される
上り電波を基地局BS1 ，BS2 はそれぞれ受信可能な最低
の電界強度で受信することができる。従って、基地局BS
1 で基地局BS2 の下り電波を測定しようとすると前述し
たように問題が生じるが、移動局を利用することによ
り、基地局BS1 では領域Aov 、つまり自ゾーンZ1での基
地局BS2 の下り電波の電界強度を移動局を利用して測定
することができる。つまり基地局BS2 の単独での受信範
囲を等価的に２倍にしたことになる。That is, for example, as shown in FIG.
Zone 1 (service area) Z 1 and base station BS 2 zone
Boundary between the Z 2 overlaps, the mobile station located in the overlapping region A ov can also receive a downlink radio wave from any of the base stations BS 1, BS 2, and emitted from the mobile station in this area A o v The base stations BS 1 and BS 2 can receive the uplink radio wave with the lowest receivable electric field strength. Therefore, the base station BS
The problem arises as described above when trying to measure the downlink radio wave of the base station BS 2 at 1 , but by using the mobile station, the base station BS 1 uses the area A ov , that is, the base station BS in its own zone Z 1. The electric field strength of the second downlink radio wave can be measured using the mobile station. That is, the reception range in a single base station BS 2 that was equivalently doubled.
【図１】サービスエリア内のゾーンと基地局の配置を示
す図。FIG. 1 is a diagram showing an arrangement of zones and base stations in a service area.
【図２】隣接基地局一覧情報の例を示す図。FIG. 2 is a diagram showing an example of neighboring base station list information.
【図３】Ａはこの発明の第１の観点による方法の手順を
示す流れ図、Ｂはこの発明の第２の観点による方法の手
順を示す流れ図、Ｃはこの発明の第３の観点による方法
の手順を示す流れ図。3A is a flowchart showing a procedure of a method according to a first aspect of the present invention, FIG. 3B is a flowchart showing a procedure of a method according to a second aspect of the present invention, and C is a flowchart of a method according to a third aspect of the present invention. 5 is a flowchart showing a procedure.
【図４】Ａはこの発明の第４の観点による方法の手順を
示す図、Ｂはこの発明の第５の観点による方法の手順を
示す図、Ｃはこの発明の第６の観点による方法の手順を
示す図。FIG. 4A is a diagram showing a procedure of a method according to a fourth aspect of the present invention, FIG. 4B is a diagram showing a procedure of a method according to a fifth aspect of the present invention, and C is a diagram of a method according to a sixth aspect of the present invention. The figure which shows a procedure.
【図５】隣接基地局とそのサービスエリアとの関係を示
す図。FIG. 5 is a diagram showing a relationship between adjacent base stations and their service areas.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 永田 清人 東京都港区虎ノ門二丁目10番１号 エ ヌ・ティ・ティ移動通信網株式会社内 (56)参考文献 特開 平４−133531（ＪＰ，Ａ) 特開 平５−67996（ＪＰ，Ａ) 特表 平６−511609（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H04Q 7/00 - 7/38 H04B 7/24 - 7/26 102 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Kiyoto Nagata 2-1-1, Toranomon, Minato-ku, Tokyo Inside NTT Mobile Communication Network Co., Ltd. (56) References JP-A-4-133353 ( JP, A) JP-A-5-67996 (JP, A) JP-A-6-511609 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) H04Q 7/ 00-7/38 H04B 7/24-7/26 102
Claims (7)
地局がそれぞれ設けられた複数のゾーンからなるサービ
スエリア内の各基地局における隣接ゾーン情報の生成方
法であり、以下のステップを含む： (a) 無線基地局において、自無線基地局の下り周波数以
外の全下り周波数帯域の電波の電界強度を測定し、 (b) その測定結果から自基地局の周囲に下り電波が存在
するか否かを判定し、 (c) 存在すると判定された周波数の電波が、上記共通の
移動通信システムに使用されているものか否かを解析す
る要求を移動局に対して送信し、 (d) 上記要求を受信した移動局は、指示された周波数の
電波が上記共通の移動通信システムに使用されているも
のか否かの解析を行い、 (e) その解析結果を要求を受けた無線基地局に対して報
告し、 (f) 上記報告を受けた無線基地局は、その解析結果に基
づいてその電波を発射している無線基地局が周辺基地局
か否かの判定を行い、 (g) 上記測定結果と解析結果に基づいて自無線基地局の
周辺基地局状態を認識し、隣接基地局一覧情報の生成、
更新を行う。1. A method for generating adjacent zone information at each base station in a service area comprising a plurality of zones provided with radio base stations belonging to a common mobile communication system, comprising the following steps: ) The radio base station measures the electric field strength of radio waves in all downlink frequency bands other than the downlink frequency of its own radio base station. (B) From the measurement result, it is determined whether or not downlink radio waves exist around its own base station. (C) transmitting to the mobile station a request to analyze whether the radio wave of the frequency determined to be present is used for the common mobile communication system, and (d) transmitting the request The received mobile station analyzes whether or not the radio wave of the designated frequency is used for the common mobile communication system, and (e) transmits the analysis result to the radio base station that has received the request. (F) Receive the above report The transmitting radio base station determines whether or not the radio base station emitting the radio wave is a peripheral base station based on the analysis result. (G) Based on the measurement result and the analysis result, Recognize the neighboring base station status, generate neighboring base station list information,
Perform an update.
地局がそれぞれ設けられた複数のゾーンからなるサービ
スエリア内の各基地局における隣接ゾーン情報の生成方
法であり、以下のステップを含む： (a) 移動局で在圈ゾーンの無線基地局の下り周波数以外
の全下り周波数の電波の電界強度を測定し、 (b) その測定結果を、上記在圈ゾーンの無線基地局に対
して報告し、 (c) 上記報告を受信した上記無線基地局は、その測定結
果に所定電界強度以上の電波が存在するか判定し、存在
すればそれら電界強度が所定値以上の電波が上記共通の
移動通信システムに使用されているものか否かの解析要
求をその電波の周波数を指定して上記移動局に対して送
信し、 (d) 上記要求を受信した移動局は、指示された周波数の
電波に対して解析を行い、 (e) 上記移動局はその解析結果を要求を受けた上記無線
基地局に対して報告し、 (f) 上記報告を受けた無線基地局は、上記測定結果と解
析結果に基づいてそれらの電波を発射している無線基地
局が周辺基地局か否かの判定を行い、 (g) 自無線基地局に対する周辺基地局状態を認識し、隣
接基地局一覧情報を上記隣接ゾーン情報として生成、更
新を行う。2. A method for generating adjacent zone information at each base station in a service area comprising a plurality of zones provided with radio base stations belonging to a common mobile communication system, comprising the following steps: ) The mobile station measures the electric field strength of radio waves of all downlink frequencies other than the downlink frequency of the radio base station in the located zone, (b) reports the measurement result to the radio base station in the located zone, (c) The radio base station receiving the report determines whether there is a radio wave having a predetermined electric field strength or more in the measurement result, and if so, the radio wave whose electric field strength is a predetermined value or more is transmitted to the common mobile communication system. (D) The mobile station receiving the request transmits an analysis request to the mobile station specifying the frequency of the radio wave, (E) The mobile station reports the analysis result to the requested radio base station, and (f) the radio base station receiving the report emits those radio waves based on the measurement result and the analysis result. (G) Recognize the state of the peripheral base station with respect to the own radio base station, and generate and update the neighboring base station list information as the neighboring zone information.
地局がそれぞれ設けられた複数のゾーンからなるサービ
スエリア内の各基地局における隣接ゾーン情報の生成方
法であり、以下のステップを含む： (a) 移動局に於て、自律的に全下り周波数帯域の電波の
電界強度を測定し、 (b) その測定結果から上記移動局が在圈中の無線基地局
の周辺の他の無線基地局からの下り電波が存在するか否
かを判定し、 (c) 存在すると判定される電波が、上記共通の移動通信
システムに使用されているかを上記移動局が自律に解析
し、 (d) 上記解析結果をもって、その移動局が在圈中の無線
基地局の周辺の無線基地局の状態を上記移動局が認識
し、 (e) これにより収拾される上記周辺無線基地局の周辺情
報を、上記在圈中の無線基地局に対して報告を行い、 (f) この報告を受けた無線基地局は、この報告をもとに
隣接基地局一覧情報の生成、更新を行う。3. A method for generating adjacent zone information in each base station in a service area including a plurality of zones provided with radio base stations belonging to a common mobile communication system, including the following steps: ) The mobile station autonomously measures the electric field strength of the radio wave in the entire downlink frequency band, and (b) from the measurement result, the mobile station is transmitted from other radio base stations in the vicinity of the radio base station located in the area. The mobile station autonomously analyzes whether the radio wave determined to be present is used for the common mobile communication system, and (d) the analysis Based on the result, the mobile station recognizes the state of the wireless base station in the vicinity of the wireless base station in the area where the mobile station is located. Report to the wireless base stations in the circle, and (f) The base station having received the report generates and updates the adjacent base station list information based on the report.
地局がそれぞれ設けられた複数のゾーンからなるサービ
スエリア内の各基地局における隣接ゾーン情報の生成方
法であり、以下のステップを含む： (a) 移動局に於て、現在在圈中の移行元ゾーンから移行
先ゾーンへゾーン移行する際に、上記移行元ゾーンの無
線基地局から発射される下り制御チャネル電波の電界強
度の測定と、上記移行先ゾーンの無線基地局から発射さ
れる制御チャネル電波の電界強度の測定とを行い、 (b) これらの測定結果を元に、移行元ゾーンが、移行先
ゾーンの隣接周辺であるか否かを判定し、 (c) 隣接周辺と判定されると、上記移行元ゾーンの無線
基地局の存在を上記移行先ゾーンの無線基地局に通知
し、 (d) 上記通知を受信した上記移行先無線基地局は、この
通知をもとに隣接基地局一覧情報の生成、更新を行う。4. A method for generating adjacent zone information in each base station in a service area including a plurality of zones provided with radio base stations belonging to a common mobile communication system, including the following steps: ) In the mobile station, when performing a zone transition from the source zone in the current area to the destination zone, measuring the electric field strength of the downlink control channel radio wave emitted from the radio base station in the source zone, Measure the electric field strength of the control channel radio wave emitted from the wireless base station in the destination zone. (B) Based on these measurement results, determine whether the source zone is in the vicinity of the destination zone. (C) when it is determined to be in the vicinity of the neighbor, notifies the existence of the wireless base station in the source zone to the wireless base station in the destination zone, and (d) the destination wireless having received the notification. The base station communicates Generation of adjacent base stations list information on the basis of, perform the update.
地局がそれぞれ設けられた複数のゾーンからなるサービ
スエリア内の各基地局における隣接ゾーン情報の生成方
法であり、以下のステップを含む： (a) 移動局に於て、現在在圈中の移行元ゾーンから移行
先ゾーンへゾーン移行する際に、上記移行元ゾーンの無
線基地局から発射される下り制御チャネル電波の電界強
度の測定と、上記移行先ゾーンの無線基地局から発射さ
れる制御チャネル電波の電界強度の測定とを行い、 (b) これらの測定結果を上記移行先ゾーンの無線基地局
に対して報告を行い、 (c) 上記報告を受けた無線基地局はこの報告に基づいて
移行元ゾーンの無線基地局が上記移行先ゾーンの無線基
地局の隣接周辺かどうかを判断し、隣接基地局一覧情報
の生成、更新を行う。5. A method for generating adjacent zone information at each base station in a service area comprising a plurality of zones provided with radio base stations belonging to a common mobile communication system, comprising the following steps: ) In the mobile station, when performing a zone transition from the source zone in the current area to the destination zone, measuring the electric field strength of the downlink control channel radio wave emitted from the radio base station in the source zone, Measure the electric field strength of the control channel radio wave emitted from the wireless base station of the destination zone, (b) Report these measurement results to the wireless base station of the destination zone, (c) Based on this report, the wireless base station that has received the report determines whether the wireless base station in the source zone is adjacent to the wireless base station in the destination zone, and generates and updates the adjacent base station list information.
において、更に以下のステップを含む： (h) 上記無線基地局に在圈中の移動局でその在圈中無線
基地局の下り周波数以外の周波数電波の電界強度を測定
し、 (i) その測定結果を、上記在圈中無線基地局に対して報
告を行い、 (j) 上記報告を受信した無線基地局は報告された測定結
果から、上記移動局が、その電波の解析が行えるか否か
の判定を行ない、行えると判定されると、その電波が、
上記共通の移動通信システムに使用されているか否かの
解析要求の移動局に対して送信し、 (k) 上記要求を受信した上記移動局は、指示された周波
数電波に対して解析を行い、 (l) その結果を要求を受けた無線基地局に対して報告
し、 (m) この報告を受けた無線基地局は、その情報を元にし
てその電波を発射している無線基地局が周辺基地局か否
かの判定を行い、 (n) 自無線基地局に対する周辺基地局状態を認識し、上
記隣接基地局一覧情報の生成、更新を行う。6. The method for automatically generating adjacent zone information according to claim 1 , further comprising the following steps: (h) a mobile station located in the radio base station other than the downlink frequency of the radio base station located in the area. Measuring the electric field strength of the radio wave of the frequency, (i) reporting the measurement result to the radio base station located in the area, (j) receiving the report, the radio base station receives the measurement result from the reported measurement result. The mobile station determines whether or not the radio wave can be analyzed, and if it is determined that the radio wave can be analyzed,
Transmit to the mobile station of the analysis request whether or not it is used in the common mobile communication system, (k) The mobile station receiving the request performs analysis on the indicated frequency radio wave, (l) The result is reported to the requested radio base station, and (m) The radio base station receiving this report is It determines whether or not it is a base station. (N) Recognizes the state of neighboring base stations with respect to its own wireless base station, and generates and updates the neighboring base station list information.
において、更に以下のステップを含む： (o) 上記移動局で、現在在圈中の移行元ゾーンから移行
先ゾーンへゾーン移行する際に、上記移行元ゾーンの無
線基地局から発射される下り制御チャネル電波の電界強
度の測定と、上記移行先ゾーンの無線基地局から発射さ
れる制御チャネル電波の電界強度の測定とを行い、 (p) これらの測定結果を上記移行先ゾーンの無線基地局
に対して報告を行い、 (q) 上記報告を受けた無線基地局はこの報告をもとに、
移行元ゾーンの無線基地局が、上記移行先ゾーンの無線
基地局の隣接周辺かどうかを判断して、上記隣接基地局
一覧情報の生成、更新を行う。7. The method for automatically generating adjacent zone information according to claim 6 , further comprising the following steps: (o) when the mobile station performs a zone transition from a source zone in the current area to a destination zone. Measuring the electric field strength of the downlink control channel radio wave emitted from the radio base station in the source zone, and measuring the electric field strength of the control channel radio wave emitted from the radio base station in the destination zone, (p ) These measurement results are reported to the wireless base station in the destination zone. (Q) The wireless base station receiving the report, based on this report,
The wireless base station in the transfer source zone determines whether or not the wireless base station is in the vicinity of the wireless base station in the transfer destination zone, and generates and updates the adjacent base station list information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7331840A JP3063822B2 (en) | 1994-12-28 | 1995-12-20 | Adjacent zone information automatic generation method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32779394 | 1994-12-28 | ||
| JP6-327793 | 1994-12-28 | ||
| JP7331840A JP3063822B2 (en) | 1994-12-28 | 1995-12-20 | Adjacent zone information automatic generation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08237728A JPH08237728A (en) | 1996-09-13 |
| JP3063822B2 true JP3063822B2 (en) | 2000-07-12 |
Family
ID=26572642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7331840A Expired - Lifetime JP3063822B2 (en) | 1994-12-28 | 1995-12-20 | Adjacent zone information automatic generation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3063822B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006745B8 (en) | 1998-05-08 | 2004-07-14 | Ntt Mobile Communications Network Inc. | Radio communication system, and method and apparatus for frequency allocation |
| FI111204B (en) | 1998-06-29 | 2003-06-13 | Nokia Corp | Procedure and mobile phone for configuring a base station |
| ATE467282T1 (en) * | 2000-09-14 | 2010-05-15 | Allen Telecom Llc | METHOD FOR MODELING A CDMA CELLULAR TELEPHONE SYSTEM |
| SG112814A1 (en) | 2000-11-13 | 2005-07-28 | Ntt Docomo Inc | Mobile communication system and distributed broadcast information control method in mobile communication system |
| DK1461790T3 (en) | 2002-01-03 | 2005-11-21 | Vkr Holding As | Method and system for transmitting signals |
| JP3799282B2 (en) * | 2002-03-22 | 2006-07-19 | Ｎｅｃインフロンティア株式会社 | Wireless LAN base station capable of automatic wireless channel alignment |
| US7522919B2 (en) * | 2003-07-14 | 2009-04-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Enhancements to periodic silences in wireless communication systems |
| JP2005130473A (en) | 2003-10-03 | 2005-05-19 | Matsushita Electric Ind Co Ltd | Radio communication system, base station, and mobile station |
| US7509131B2 (en) * | 2004-06-29 | 2009-03-24 | Microsoft Corporation | Proximity detection using wireless signal strengths |
| US8081999B2 (en) * | 2004-09-14 | 2011-12-20 | Nokia Corporation | Enhanced assisted cell change |
| DE202005021930U1 (en) | 2005-08-01 | 2011-08-08 | Corning Cable Systems Llc | Fiber optic decoupling cables and pre-connected assemblies with toning parts |
| JP4788905B2 (en) * | 2006-05-01 | 2011-10-05 | 日本電気株式会社 | Mobile communication system and base station antenna proximity determination method |
| GB2446738C (en) * | 2007-02-02 | 2014-10-01 | Ubiquisys Ltd | Basestation measurement modes |
| JP5141267B2 (en) * | 2007-02-22 | 2013-02-13 | 富士通株式会社 | Cellular mobile radio communication system |
| US8073500B2 (en) * | 2007-09-21 | 2011-12-06 | Kyocera Corporation | Detecting the presence of multiple communication access technologies |
| JP5213053B2 (en) * | 2009-03-11 | 2013-06-19 | Ｎｅｃインフロンティア株式会社 | Wireless LAN system and site survey method |
| JP5708813B2 (en) * | 2011-09-01 | 2015-04-30 | 日本電気株式会社 | Management method, management node, communication system, and program |
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1995
- 1995-12-20 JP JP7331840A patent/JP3063822B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08237728A (en) | 1996-09-13 |
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