JPH03104328A - Mobile communication control method - Google Patents

Mobile communication control method

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Publication number
JPH03104328A
JPH03104328A JP24064189A JP24064189A JPH03104328A JP H03104328 A JPH03104328 A JP H03104328A JP 24064189 A JP24064189 A JP 24064189A JP 24064189 A JP24064189 A JP 24064189A JP H03104328 A JPH03104328 A JP H03104328A
Authority
JP
Japan
Prior art keywords
base station
zone
reception level
mobile
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.)
Granted
Application number
JP24064189A
Other languages
Japanese (ja)
Other versions
JP2560854B2 (en
Inventor
Masao Taniguchi
谷口 昌雄
Katsumi Kobayashi
勝美 小林
Seizo Onoe
誠蔵 尾上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1240641A priority Critical patent/JP2560854B2/en
Publication of JPH03104328A publication Critical patent/JPH03104328A/en
Application granted granted Critical
Publication of JP2560854B2 publication Critical patent/JP2560854B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To control the size of a radio zone by correcting a reception level from a base station with a correction value of a reception level informed from the base station to a mobile station and informing the threshold level of the reception level required to make communication from each base station to the mobile station. CONSTITUTION:A correction value is informed to a mobile station 4 with an informing signal informed from base stations 1, 2, 3. Moreover, a mobile station 4 reads the correction value with the informing signal from the base stations 1, 2, 3 and measures the reception level 11 of the base stations 1, 2, 3 and obtains the reception level 11 of the base stations 1, 2, 3 and a reception level 12 after the correction to the base stations 1, 2, 3 from the correction value with the calculation. It is regarded by the correction that the radio zones of the base stations 1, 2, 3 are changed automatically. Thus, the size of the zone is controlled by calculating the correction value at the mobile station 4.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、小ゾーン構成の移動通信方式において、移動
機の在圏無線ゾーン境界を制御して通話すべき基地局を
決定する方法に関するものである。
[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for determining a base station to call by controlling the boundary of a wireless zone in which a mobile device is located in a mobile communication system with a small zone configuration. It is.

(従来の技術) 以下に、従来の移動通信方式として自動車電話方式を例
にとり、通話に際しての移動機の在圏無線ゾーン判定を
行う方法について述べる。
(Prior Art) Hereinafter, a method for determining the radio zone in which a mobile device is located during a call will be described using a car telephone system as an example of a conventional mobile communication system.

自動車電話方式では移動局で受信される基地局からの電
波の強さ(受信レベル)が、通信を行うのに十分なレベ
ルがある所を全て無線ゾーンとしていた。このゾーンの
大きさは、地形など、伝搬条件に影響されるものの、基
本的には基地局の送信電力によって決まる。
In the car telephone system, all areas where the strength (reception level) of radio waves received by a mobile station from a base station are at a sufficient level for communication are defined as wireless zones. Although the size of this zone is affected by propagation conditions such as topography, it is basically determined by the transmission power of the base station.

第4図に従来の自動車電話方式において通話の際のゾー
ン判定を行う場合の例を示す。第4図(a)はゾーン構
成を示し、同図(b)は移動局での各基地局からの受信
レベルを示す。第4図(a)において、1〜3は基地局
、4は移動局、5は基地局1のゾーン、6は基地局2の
ゾーン、7は基地局3のゾーン、8は移動局4が通信を
行うのに必要な受信レベルのしきい値、31はゾーン判
定境界を示す。
FIG. 4 shows an example of zone determination during a call in a conventional car telephone system. FIG. 4(a) shows the zone configuration, and FIG. 4(b) shows the reception level from each base station at the mobile station. In FIG. 4(a), 1 to 3 are base stations, 4 is a mobile station, 5 is the zone of base station 1, 6 is the zone of base station 2, 7 is the zone of base station 3, and 8 is the zone of mobile station 4. A reception level threshold 31 necessary for communication indicates a zone determination boundary.

次に、従来の通話の際のゾーン判定の動作を説明する。Next, a conventional zone determination operation during a phone call will be described.

移動局4が例えば、基地局のゾーン境界に位置し、これ
らの基地局と通信のできる受信レベルを有しているとす
る。つまり受信レベルがしきい値8より大きいとする。
For example, it is assumed that the mobile station 4 is located at a zone boundary of base stations and has a reception level that allows communication with these base stations. In other words, it is assumed that the reception level is higher than the threshold value 8.

また、その受信レベルは第4図(b)に示すように基地
局1、基地局2、基地局3の順に高いものとする。移動
局4は受信レベルの最も高い基地局を選択し、そのゾー
ンにいると判定する。もし基地局1の通信用チャネルが
全て使用中の時でも、通話チャネル接続制御アルゴリズ
ムによって移動局4は受信レベルの最も高い基地局1を
選択し続けるので呼損となる。
Further, the reception level is assumed to be higher in the order of base station 1, base station 2, and base station 3 as shown in FIG. 4(b). The mobile station 4 selects the base station with the highest reception level and determines that it is in that zone. Even if all the communication channels of the base station 1 are in use, the mobile station 4 continues to select the base station 1 with the highest reception level due to the communication channel connection control algorithm, resulting in a call loss.

このように従来の自動車電話方式では、通話に際しての
無線回線設定において受信レベルの強さのみで在圏無線
ゾーンを判定しているために、この例のようにその他に
も通信を行うのに十分な受信レベルがある基地局が存在
する場合でも呼損が生じ、サービスの低下となる欠点が
あった。
In this way, with conventional car phone systems, when setting up a wireless line for a call, the wireless zone in which the area is located is determined only based on the strength of the reception level. Even if there is a base station with a high reception level, call loss occurs and service deteriorates.

また、第5図に別の従来例の自動車電話方式のゾーン判
定に改良を加えた場合の例を示す。同図において、16
. 17は基地局、l8は基地局1のゾーン、19は基
地局2のゾーン、21は移動局、34はゾーン判定境界
を示す。
Further, FIG. 5 shows an example in which the zone determination of another conventional car telephone system is improved. In the same figure, 16
.. 17 is a base station, l8 is a zone of base station 1, 19 is a zone of base station 2, 21 is a mobile station, and 34 is a zone determination boundary.

次に、別の従来の通話の際のゾーン判定の動作を説明す
る。
Next, another conventional zone determination operation during a telephone call will be described.

移動局2lが例えば、基地局16と基地局17のゾーン
境界に位置し、両基地局と通信を行うのに十分な受信レ
ベルがあり、かつ、基地局16からの受信レベルの方が
高いものとする。この時、上記第1の従来例と同様に受
信レベルの高い基地局16を自ゾーンと判定し、発呼動
作等を行った場合に、基地局16の通信用チャネルが全
て使用中であった場合は呼損となる。しかし、第5図に
示す別の従来例では、このような場合には、基地局l6
から移動局21に、自ゾーンには通信用チャネル全て使
用中で空きチャネルがないため他の基地局を教えて呼損
な減少させるようにしている。
For example, the mobile station 2l is located at the zone boundary between base station 16 and base station 17, has a reception level sufficient to communicate with both base stations, and has a higher reception level from base station 16. shall be. At this time, similar to the first conventional example above, when the base station 16 with a high reception level is determined to be in the own zone and a calling operation is performed, all communication channels of the base station 16 are in use. If so, the call will be lost. However, in another conventional example shown in FIG.
The mobile station 21 informs the mobile station 21 of other base stations since all communication channels in its own zone are in use and there are no free channels to reduce the number of lost calls.

(発明が解決しようとする課題) しかしながら、この従来の方法でも、ゾーン境界でラン
ダムに存在する移動局を隣接基地局に振り分けるため、
基地局l7のゾーン端に移動局が存在した場合(基地局
16に近い所)には、同一チャネルを使用する他の基地
局との干渉条件が厳しくなり、繰り返し距離を多くとる
必要が生ずる等の欠点がある。
(Problem to be Solved by the Invention) However, even in this conventional method, mobile stations randomly existing at zone boundaries are distributed to adjacent base stations.
If a mobile station exists at the edge of the zone of base station 17 (close to base station 16), the interference conditions with other base stations using the same channel will become severe, making it necessary to repeatedly increase the distance, etc. There are drawbacks.

本発明はこれらの問題点を解決するためのもので、基地
局からの制御により自ゾーンの大きさを擬似的に制御し
、呼損を減少させることによりサービスの向上を図るこ
とができる移動通信制御方法を提供することを目的とす
る。
The present invention is intended to solve these problems, and is a mobile communication system that can improve service by pseudo-controlling the size of its own zone under control from a base station and reducing call losses. The purpose is to provide a control method.

(課題を解決するための手段) 本発明は前記問題点を解決するために、在圏無線ゾーン
判定に用いる移動局で測定する基地局からの受信レベル
を、基地局から移動局に報知する受信レベルの補正値に
よって補正することにより、また各基地局から移動局に
通信を行なうのに必要な受信レベルのしきい値を報知す
ることにより、無線ゾーンの大きさを制御することに特
徴がある。
(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a reception system in which the base station notifies the mobile station of the reception level from the base station measured by the mobile station used for determining the wireless zone in which it is located. The feature is that the size of the wireless zone is controlled by correcting it with a level correction value and by notifying the reception level threshold required for communication from each base station to a mobile station. .

(作用) よって、本発明は報知信号を送信する複数の基地局と、
複数の基地局の報知信号を受信する機能と受信レベルを
測定する機能を有する移動局が存在し、複数の基地局の
受信レベルを移動局で比較することが可能な如く構成さ
れた小ゾーン移動移動通信方式において、先ず各基地局
から移動局に受信レベルの補正値を報知し、移動局で測
定した各基地局の受信レベルを補正値により補正する。
(Operation) Therefore, the present invention includes a plurality of base stations that transmit broadcast signals,
There is a mobile station that has the function of receiving broadcast signals from multiple base stations and the function of measuring reception levels, and small zone movement is configured such that the mobile station can compare the reception levels of multiple base stations. In a mobile communication system, each base station first notifies a mobile station of a correction value for the reception level, and the reception level of each base station measured by the mobile station is corrected using the correction value.

さらに各基地局から移動局に通信を行うのに必要な受信
レベルのしきい値を報知する。よって、通話可能判定の
ための受信レベルのしきい値を各基地局ごとに補正して
変化させることにより無線ゾーンの大きさを制御する。
Furthermore, each base station notifies the mobile station of the reception level threshold required for communication. Therefore, the size of the wireless zone is controlled by correcting and changing the reception level threshold for determining callability for each base station.

したがって、基地局からの制御により自ゾーンの大きさ
を擬似的に制御し、呼損を減少させることによりサービ
スの向上を図ることができる。
Therefore, it is possible to improve the service by pseudo-controlling the size of the own zone under control from the base station and reducing call losses.

(実施例) 以下、本発明の一実施例を図面に基づいて説明する。(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

第1図(a)は本発明の第lの実施例のゾーン構成を示
す図である。同図(b)は各基地局から報知する補正値
の量を示し、同図(c)に補正後の受信レベルを示す。
FIG. 1(a) is a diagram showing a zone configuration of a first embodiment of the present invention. The figure (b) shows the amount of correction value broadcasted from each base station, and the figure (c) shows the reception level after correction.

ここでは補正値は規定の受信レベルから差し引く量を示
す。つまり補正値が大きいほど実際の受信レベルより小
さいものと判定される。本実施例は基地局から移動局に
受信レベルの補正値を報知してゾーン判定を行う場合の
例を示す。第1図(a)において、1〜3は基地局、4
は移動局、5は基地局1のゾーン境界制御を行う前のゾ
ーン、6は基地局2のゾーン境界制御を行う前のゾーン
、7は基地局3のゾーン、8は移動局4が通信を行うの
に必要な受信レベルのしきい値、9は基地局1のゾーン
境界制御を行った後のゾーン、10は基地局2のゾーン
境界制御を行った後のゾーン、11は移動局4で実際に
測定される基地局l〜3の受信レベル、l2は補正値で
補正された受信レベル、32は補正された受信レベルに
基づいて判定されるゾーン判定境界を示す。
Here, the correction value indicates the amount to be subtracted from the specified reception level. In other words, the larger the correction value is, the lower the actual reception level is determined to be. This embodiment shows an example in which a base station notifies a mobile station of a correction value of the reception level and performs zone determination. In FIG. 1(a), 1 to 3 are base stations, 4
is the mobile station, 5 is the zone before zone boundary control of base station 1, 6 is the zone before zone boundary control of base station 2, 7 is the zone of base station 3, and 8 is the zone where mobile station 4 is communicating. 9 is the zone after zone boundary control of base station 1, 10 is the zone after zone boundary control of base station 2, and 11 is the threshold of the reception level required for mobile station 4. The actually measured reception levels of the base stations 1 to 3, 12 the reception level corrected by the correction value, and 32 the zone determination boundary determined based on the corrected reception level.

次に、本実施例の動作について説明するが、例えば基地
局1と2でトラヒックが大きく、通話チャネルの使用率
が非常に高くなったために、ゾーン境界にいる移動局4
を基地局3のゾーンに存在するように在圏無線ゾーン判
定を実施する場合を例にとり述べる。
Next, the operation of this embodiment will be explained. For example, when the traffic at base stations 1 and 2 is large and the communication channel usage rate is extremely high, mobile station 4 at the zone boundary
An example will be described in which the wireless zone determination is performed so that the base station 3 exists in the zone of the base station 3.

先ず、ここで移動局4が例えば全ての基地局のゾーン境
界に位置し、全ての基地局と通信のでき得る受信レベル
を有している。つまり受信レベル補正前の各基地局のゾ
ーンは第1図(a)中で点線で示されるが、移動局4は
全基地局のゾーンに含まれるような位置にいるとする。
First, here, the mobile station 4 is located, for example, at the zone boundary of all the base stations, and has a reception level that allows it to communicate with all the base stations. In other words, the zone of each base station before receiving level correction is indicated by a dotted line in FIG. 1(a), and it is assumed that the mobile station 4 is located at a position that is included in the zone of all base stations.

また、そのとき受信レベルは、同図(C)の受信レベル
l1に示すように基地局1、基地局2、基地局3の順に
高いものとする。この時に、各基地局から報知する報知
信号で同図(b)に示す補正値を移動局4に報知する。
Further, at this time, the reception level is assumed to be higher in the order of base station 1, base station 2, and base station 3, as shown by reception level l1 in FIG. At this time, the mobile station 4 is notified of the correction value shown in FIG. 4(b) using a broadcast signal broadcast from each base station.

また、移動局4は、各基地局からの報知信号により補正
値を読み取るとともに、各基地局の受信レベル1lを測
定し、各基地局の受信レベル11と補正値から各基地局
に対する補正後の受信レベルl2を演算により求める。
In addition, the mobile station 4 reads the correction value from the broadcast signal from each base station, measures the reception level 1l of each base station, and calculates the correction value for each base station from the reception level 11 of each base station and the correction value. The reception level l2 is calculated.

これにより同図(c)に示すように基地局lと基地局2
からの補正後受信レベル12は基地局3からのそれより
も低くなり、補正後の受信レベルl2は、例えば基地局
3、基地局2、基地局1の順に高くなる。この補正後の
受信レベルl2を用いてゾーン判定を行えば、移動局4
を基地局3に存在していると判定させることができる。
As a result, base station 1 and base station 2 are connected as shown in FIG.
The corrected reception level 12 from the base station 3 is lower than that from the base station 3, and the corrected reception level l2 increases in the order of, for example, the base station 3, the base station 2, and the base station 1. If zone determination is performed using this corrected reception level l2, mobile station 4
It is possible to cause the base station 3 to determine that the base station 3 exists.

つまり、この補正により各基地局の無線ゾーンが自動的
に変化したものとみなすことができる。この新しいゾー
ンは第1図(a)の実線で示すゾーン9及び10である
In other words, it can be considered that the wireless zone of each base station has automatically changed due to this correction. The new zones are zones 9 and 10 shown in solid lines in FIG. 1(a).

このように、移動局で測定する受信レベルと基地局から
報知される補正値を移動局で演算することにより、ゾー
ンの大きさを制御することが可能となる。また、補正値
を基地局から報知するために、基地局で補正値を選択で
き、基地局のみの制御でゾーンの大きさを自由に変化さ
せることができる。
In this way, the size of the zone can be controlled by calculating, at the mobile station, the reception level measured by the mobile station and the correction value broadcasted from the base station. Further, since the base station broadcasts the correction value, the base station can select the correction value, and the size of the zone can be freely changed under the control of the base station alone.

このように基地局から報知する補正値を各基地局のチャ
ネル使用率に対応させることにより、呼損を減少するこ
とができる。例えば、基地局1と基地局2がチャネル使
用率が高く、基地局3がチャネル使用率が低い場合に、
基地局1と基地局2の補正値を多くして、基地局3の補
正値を少なくすることにより、受信レベルの逆転が起こ
り、移動局4はチャネル使用率の低い基地局3を自ゾー
ンとすることができる。
By making the correction value broadcast from the base station correspond to the channel usage rate of each base station in this way, call loss can be reduced. For example, if base station 1 and base station 2 have a high channel usage rate and base station 3 has a low channel usage rate,
By increasing the correction values for base station 1 and base station 2 and decreasing the correction value for base station 3, a reversal of the reception level occurs, and mobile station 4 considers base station 3, which has a low channel usage rate, as its own zone. can do.

このように、本実施例のゾーン境界制御方法を用い、さ
らに、補正値を基地局のチャネル使用率と対応させるこ
とにより、隣接基地局のチャネル使用率を制御し、呼損
を減らすとともに周波数を有効に利用することができる
In this way, by using the zone boundary control method of this embodiment and also by associating the correction value with the channel usage rate of the base station, it is possible to control the channel usage rate of adjacent base stations, reduce call loss, and increase the frequency. It can be used effectively.

次に、第2図(a)は本発明の第2の実施例のゾーン構
成を示し、同図(b)は受信レベルとしきい値を示す図
である。本実施例の基地局から移動局に通信を行うのに
必要な受信レベルのしきい値を報知してゾーン判定を行
う場合の例を示す。同図(a)において、1〜3は基地
局、4は移動局、5は基地局1のゾーン境界制御を行う
前のゾーン、6は基地局2のゾーン境界制御を行う前の
ゾーン、7は基地局3のゾーン、11は移動局で受信さ
れる基地局の受信レベル、13は基地局1のゾーン境界
制御を行った後のゾーン、l4は基地局から移動局に報
知されるしきい値、15は受信レベルとしきい値との差
、33はこの実施例を実行後の新たな無線ゾーンに対応
するゾーン判定境界を示す。
Next, FIG. 2(a) shows a zone configuration of a second embodiment of the present invention, and FIG. 2(b) is a diagram showing reception levels and threshold values. An example will be shown in which a zone determination is performed by notifying a reception level threshold necessary for communication from a base station to a mobile station according to the present embodiment. In the same figure (a), 1 to 3 are base stations, 4 is a mobile station, 5 is a zone before zone boundary control of base station 1, 6 is a zone before zone boundary control of base station 2, and 7 is the zone of base station 3, 11 is the reception level of the base station received by the mobile station, 13 is the zone after zone boundary control of base station 1, and l4 is the threshold notified from the base station to the mobile station. The value 15 indicates the difference between the reception level and the threshold value, and 33 indicates the zone determination boundary corresponding to the new wireless zone after executing this embodiment.

次に、本実施例の動作について説明するが、全基地局の
ゾーン境界にいる移動局4を基地局3に存在するように
ゾーンの大きさを実施する場合を例にとり述べる。つま
り移動局4はゾーン境界に位置し、全ての基地局と通信
のでき得る受信レベルを有していると仮定する。その受
信レベルは、基地局1、基地局2、基地局3の順に高い
ものとする。この時に、各基地局から報知する報知信号
で第2図(b)に示すしきい値14を報知する。移動局
4は各基地局からの報知信号を読み取るとともに、各基
地局の受信レベルを測定し、各基地局の受信レベル11
としきい値l4とを比較する。同図(b)の基地局1で
は、受信レベルがしきい値よりも低いため、通信ができ
なくなる。これは基地局1のゾーンl3のようにゾーン
を小さくしたことになり、擬似的にゾーンの大きさを制
御したことになる。ここで、ゾーン判定を行う場合に、
受信レベル1lとしきい値l4の差が最も大きい基地局
を自ゾーンと選択するように仮定すると、同図(b)に
示すように基地局2の受信レベル11としきい値の差1
5よりも、基地局3の受信レベルl1としきい値l4の
差l5が大きいことにより、移動局4は基地局3を自ゾ
ーンと選択することができる。
Next, the operation of this embodiment will be described, taking as an example a case where the size of the zone is changed so that the mobile station 4 located at the zone boundary of all base stations is present in the base station 3. That is, it is assumed that the mobile station 4 is located at a zone boundary and has a reception level that allows communication with all base stations. The reception level is assumed to be highest in the order of base station 1, base station 2, and base station 3. At this time, the threshold value 14 shown in FIG. 2(b) is reported by a broadcast signal broadcast from each base station. The mobile station 4 reads broadcast signals from each base station, measures the reception level of each base station, and determines the reception level 11 of each base station.
and the threshold value l4. At the base station 1 shown in FIG. 4(b), the reception level is lower than the threshold value, so communication becomes impossible. This means that the zone is made smaller like zone l3 of base station 1, and the size of the zone is controlled in a pseudo manner. Here, when performing zone determination,
Assuming that the base station with the largest difference between the reception level 1l and the threshold value l4 is selected as the own zone, the difference between the reception level 11 of the base station 2 and the threshold value 1 as shown in FIG.
Since the difference l5 between the reception level l1 of the base station 3 and the threshold value l4 is larger than the difference l5 between the reception level l1 of the base station 3 and the threshold value l4, the mobile station 4 can select the base station 3 as its own zone.

このように、移動局で測定する受信レベルと基地局から
報知されるしきい値を移動局で比較することにより、ゾ
ーン境界を制御することが可能となる。また、しきい値
を基地局から報知するために、前項同様にチャネル使用
率等を加味してしきい値を選択でき、基地局のみの制御
でゾーンの大きさやチャネル使用率の制御ができる特徴
を有する。
In this way, by comparing the reception level measured by the mobile station with the threshold value broadcasted from the base station by the mobile station, it becomes possible to control the zone boundary. In addition, in order to broadcast the threshold value from the base station, the threshold value can be selected by considering the channel usage rate, etc., as in the previous section, and the zone size and channel usage rate can be controlled by only the base station. has.

第3図に本発明の適用形態の一例を示す。FIG. 3 shows an example of an application form of the present invention.

16. 17は基地局、l9は基地局17のゾーン、2
3〜25は基地局16のゾーン(ゾーン境界制御により
大きさが変化している)、27〜29は移動局、35〜
37は基地局16のゾーンが23〜25の時のゾーン判
定境界を示す。移動局27が基地局16と基地局17の
ゾーン境界に存在し、両基地局共と通信ができる受信レ
ベルを有し、かつ基地局16の方が基地局l7よりも、
受信レベルが高くさらに空いている通信用チャネルはあ
るがチャネル使用率が高いものとする。このとき従来の
方式では、移動局27は、受信レベルが最も高い基地局
16を自ゾーンと判定する。しかし、本実施例を用いて
、基地局16のチャネル使用率が高い分基地局16のゾ
ーン23を小さくして、基地局16のゾーンをゾーン2
4のようにすると、移動局27は基地局l7を自ゾーン
と判定する。
16. 17 is the base station, l9 is the zone of base station 17, 2
3 to 25 are zones of the base station 16 (sizes are changed due to zone boundary control), 27 to 29 are mobile stations, and 35 to 25 are mobile stations.
37 indicates a zone determination boundary when the base station 16 is in zones 23 to 25. Mobile station 27 exists on the zone boundary between base station 16 and base station 17, has a reception level that allows communication with both base stations, and base station 16 has a higher reception level than base station 17.
Assume that there is a communication channel with a high reception level and an empty communication channel, but the channel usage rate is high. At this time, in the conventional method, the mobile station 27 determines that the base station 16 with the highest reception level is in its own zone. However, by using this embodiment, the zone 23 of the base station 16 is made smaller in proportion to the high channel usage rate of the base station 16, and the zone 23 of the base station 16 is changed to zone 2.
4, the mobile station 27 determines that the base station 17 is in its own zone.

さらに、基地局16のチャネル使用率が高い場合には、
基地局16のゾーンをゾーン25とすることにより、移
動局28も基地局l7を自ゾーンと判定することになる
。また、このときに移動局29が存在した場合には、移
動局29は基地局16を自ゾーンとさせることができる
。従来の改良型では、このような場合には、移動局の存
在する順序により基地局16と基地局17を振り分ける
ことになるが、本実施例では移動局の存在する場所によ
り振り分けることができ、基地局l7に近い所に存在す
る移動局を優先的に基地局l7のゾーンと判定させるこ
とができる。これにより、干渉条件も緩やかになり、同
一チャネルを使用する基地局との繰り返し距離を小さく
とれる利点がある。
Furthermore, if the channel usage rate of the base station 16 is high,
By setting the zone of the base station 16 to zone 25, the mobile station 28 also determines that the base station 17 is its own zone. Furthermore, if the mobile station 29 is present at this time, the mobile station 29 can make the base station 16 its own zone. In the conventional improved type, in such a case, the base stations 16 and 17 are assigned according to the order in which the mobile stations are present, but in this embodiment, the base stations can be assigned according to the location where the mobile stations are present. Mobile stations existing near base station 17 can be preferentially determined to be in the zone of base station 17. This has the advantage of easing interference conditions and shortening the repeat distance with base stations that use the same channel.

以上詳細に説明したように、本実施例の方法は、ゾーン
の大きさやチャネル使用率を制御でき、さらに、干渉条
件の緩和も行える等の特徴を有した。
As described above in detail, the method of the present embodiment has features such as being able to control the zone size and channel usage rate, and also being able to alleviate interference conditions.

また、実際の制御の方法としては、ある一定時間のチャ
ネル使用率の測定結果に応じて補正値やしきい値を制御
する方法と、残りのチャネル数に応じて比較的早い間隔
で補正値やしきい値を制御する方法が考えられ、さらに
、これらの組み合わせによる制御が考えられる。このよ
うな制御方法を用いることにより、本実施例のゾーン境
界制御方法は、移動局が移動し、ゾーン毎のトラヒック
が1日の時間帯によって、または、日によって変化する
場合に特に有効である。
In addition, as actual control methods, there are two methods: one is to control the correction value and threshold value according to the measurement results of the channel usage rate for a certain period of time, and the other is to control the correction value and threshold value at relatively quick intervals depending on the number of remaining channels. Methods of controlling the threshold value can be considered, and control using a combination of these methods can also be considered. By using such a control method, the zone boundary control method of this embodiment is particularly effective when the mobile station moves and the traffic for each zone changes depending on the time of the day or depending on the day. .

(発明の効果) 以上詳細に説明したように、本発明の方法によれば、基
地局からの制御により自由にゾーンの大きさを変化させ
ることができるという利点がある。また、基地局のチャ
ネル使用率を制御でき、さらに、呼損を減少させるとと
もに干渉条件を緩和し周波数を有効に利用できるという
利点がある。
(Effects of the Invention) As described above in detail, the method of the present invention has the advantage that the size of the zone can be freely changed under control from the base station. Further, it has the advantage of being able to control the channel usage rate of the base station, reducing call loss, alleviating interference conditions, and making effective use of frequencies.

【図面の簡単な説明】[Brief explanation of drawings]

第1図(a)は本発明の第1の実施例のゾーン構成を示
す図、第1図(b)は各基地局から報知する補正値の量
を示す図、第1図(C)は補正後の受信レベルを示す図
、第2図(a)は本発明の第2の実施例のゾーン構成を
示す図、第2図(b)は受信レベルとしきい値を示す図
、第3図は本発明のゾーン境界制御方法を行った時の効
果の例を示す図、第4図は第1の従来例の自動車電話方
式において通話の際のゾーン判定を行う場合のゾーン構
成を示す図、第4図(b)は移動局での各基地局からの
受信レベルを示す図、第5図は第2の従来例の自動車電
話方式のゾーン判定に改良を加えた場合の例を示す図で
ある。 1〜3. 16.17 :基地局、 4, 21. 27〜29:移動局、 5:基地局1のゾーン境界制御を行う前のゾーン、 6:基地局2のゾーン境界制御を行う前のゾーン、 7:基地局3のゾーン、 8:移動局4が通信を行うのに必要な受信レベルのしき
い値、 9,13:基地局1のゾーン境界制御を行った後のゾー
ン、 lO:基地局2のゾーン境界制御を行った後のゾーン、 l1:移動局で受信される基地局の受信レベル、l2:
補正値で補正された受信レベル、14:基地局から移動
局に報知されるしきい値、l5:受信レベルとしきい値
との差、 18:基地局l6のゾーン、 19:基地局l7のゾーン、 23〜25:基地局16のゾーン、 32,33 :ゾーン判定境界、 35〜37:基地局16のゾーンがゾーン23〜25の
時のゾーン判定境界。 第2図 19.23−25: ゛ノ ー ン 35−37: ノ゛゜一冫≠+iこメ1−】弓ヒ 遁甲形一訓 第 3 図 イ) (コ 第 4 図
FIG. 1(a) is a diagram showing the zone configuration of the first embodiment of the present invention, FIG. 1(b) is a diagram showing the amount of correction values broadcast from each base station, and FIG. 1(C) is a diagram showing the amount of correction values broadcast from each base station. FIG. 2(a) is a diagram showing the reception level after correction. FIG. 2(a) is a diagram showing the zone configuration of the second embodiment of the present invention. FIG. 2(b) is a diagram showing the reception level and threshold value. 4 is a diagram showing an example of the effect when the zone boundary control method of the present invention is performed; FIG. 4 is a diagram showing a zone configuration when zone determination is performed during a call in the first conventional car telephone system; FIG. 4(b) is a diagram showing the reception level from each base station at the mobile station, and FIG. 5 is a diagram showing an example in which an improvement is made to the zone determination of the second conventional car telephone system. be. 1-3. 16.17: Base station, 4, 21. 27 to 29: Mobile station, 5: Zone before zone boundary control of base station 1, 6: Zone before zone boundary control of base station 2, 7: Zone of base station 3, 8: Mobile station 4 9, 13: Zone after zone boundary control of base station 1, lO: Zone after zone boundary control of base station 2, l1 : Base station reception level received by the mobile station, l2:
Reception level corrected by correction value, 14: Threshold value notified from the base station to the mobile station, l5: Difference between reception level and threshold value, 18: Zone of base station l6, 19: Zone of base station l7 , 23-25: zone of base station 16, 32, 33: zone determination boundary, 35-37: zone determination boundary when the zone of base station 16 is zone 23-25. Figure 2 19.23-25: No 35-37: No ゛ ゜ 一冫≠+i-kome 1-】Yumihito Kōgata Ikkun Figure 3 A) (Fig. 4

Claims (4)

【特許請求の範囲】[Claims] (1)報知信号を送信する複数の基地局と、複数の基地
局の報知信号を受信する機能と受信レベルを測定する機
能を有する移動局が存在し、複数の基地局の受信レベル
を移動局で比較することが可能な如く構成された小ゾー
ン移動移動通信方式において、 各基地局から移動局に受信レベルの補正値を報知し、移
動局で測定した各基地局の受信レベルを補正値により補
正することを特徴とする移動通信制御方法。
(1) There are multiple base stations that transmit broadcast signals and a mobile station that has the function of receiving broadcast signals from multiple base stations and the function of measuring reception levels, and the reception levels of multiple base stations can be measured by the mobile station. In a small-zone mobile communication system that is configured to allow comparisons, each base station notifies the mobile station of a correction value for the reception level, and the reception level of each base station measured by the mobile station is calculated using the correction value. A mobile communication control method characterized by correcting.
(2)前記補正値を各基地局のチャネル使用率に応じて
変化させる請求項1記載の移動通信制御方法。
(2) The mobile communication control method according to claim 1, wherein the correction value is changed according to the channel usage rate of each base station.
(3)報知信号を送信する複数の基地局と、複数の基地
局の報知信号を受信する機能と受信レベルを測定する機
能を有する移動局が存在し、複数の基地局の受信レベル
を移動局で比較することが可能な如く構成された小ゾー
ン移動移動通信方式において、 各基地局から移動局に通信を行うのに必要な受信レベル
のしきい値を報知することを特徴とする移動通信制御方
法。
(3) There are multiple base stations that transmit broadcast signals and mobile stations that have the function of receiving broadcast signals from multiple base stations and the function of measuring reception levels, and the reception levels of multiple base stations can be measured by the mobile station. In a small zone mobile mobile communication system configured to enable comparison between base stations and mobile stations, mobile communication control is characterized in that a reception level threshold required for communication from each base station to a mobile station is notified. Method.
(4)前記しきい値を各基地局のチャネル使用率に応じ
て変化させる請求項3記載の移動通信制御方法。
(4) The mobile communication control method according to claim 3, wherein the threshold value is changed according to the channel usage rate of each base station.
JP1240641A 1989-09-19 1989-09-19 Mobile communication control method Expired - Lifetime JP2560854B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP1240641A JP2560854B2 (en) 1989-09-19 1989-09-19 Mobile communication control method

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JPH03104328A true JPH03104328A (en) 1991-05-01
JP2560854B2 JP2560854B2 (en) 1996-12-04

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Country Link
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
US5455967A (en) * 1993-03-18 1995-10-03 Oki Electric Industry Co., Ltd. Mobile communication system and transmission power control method for a base station therein
WO1998052369A1 (en) * 1997-05-14 1998-11-19 Kabushiki Kaisha Toshiba Wireless telephone device and method for its control
JP2007101261A (en) * 2005-09-30 2007-04-19 Seiko Precision Inc Existence range identifying system, existence range identifying method, and program
JP2008517269A (en) * 2004-10-14 2008-05-22 クゥアルコム・フラリオン・テクノロジーズ、インコーポレイテッド Wireless terminal positioning using apparatus and method with carrier diversity
JP2010530198A (en) * 2007-06-18 2010-09-02 サムスン エレクトロニクス カンパニー リミテッド Method and apparatus for performing measurements on neighboring cells in a mobile communication system
JP2017511021A (en) * 2014-02-24 2017-04-13 インテル アイピー コーポレイション Adaptive silencing mechanism for device-to-device (D2D) discovery

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Publication number Priority date Publication date Assignee Title
JPS6468138A (en) * 1987-09-09 1989-03-14 Nippon Telegraph & Telephone Traffic control method in mobile communication

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6468138A (en) * 1987-09-09 1989-03-14 Nippon Telegraph & Telephone Traffic control method in mobile communication

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5455967A (en) * 1993-03-18 1995-10-03 Oki Electric Industry Co., Ltd. Mobile communication system and transmission power control method for a base station therein
WO1998052369A1 (en) * 1997-05-14 1998-11-19 Kabushiki Kaisha Toshiba Wireless telephone device and method for its control
JP2008517269A (en) * 2004-10-14 2008-05-22 クゥアルコム・フラリオン・テクノロジーズ、インコーポレイテッド Wireless terminal positioning using apparatus and method with carrier diversity
US8000687B2 (en) 2004-10-14 2011-08-16 Qualcomm Incorporated Wireless terminal location using apparatus and methods employing carrier diversity
JP2007101261A (en) * 2005-09-30 2007-04-19 Seiko Precision Inc Existence range identifying system, existence range identifying method, and program
JP2010530198A (en) * 2007-06-18 2010-09-02 サムスン エレクトロニクス カンパニー リミテッド Method and apparatus for performing measurements on neighboring cells in a mobile communication system
US8811990B2 (en) 2007-06-18 2014-08-19 Samsung Electronics Co., Ltd Method and apparatus for performing measurement on neighboring cells in a mobile communication system
KR101482255B1 (en) * 2007-06-18 2015-01-13 삼성전자주식회사 A method and an apparatus for measuring on neighboring cells in mobile telecommunication system
JP2017511021A (en) * 2014-02-24 2017-04-13 インテル アイピー コーポレイション Adaptive silencing mechanism for device-to-device (D2D) discovery

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