JPH0543238B2 - - Google Patents
Info
- Publication number
- JPH0543238B2 JPH0543238B2 JP61278727A JP27872786A JPH0543238B2 JP H0543238 B2 JPH0543238 B2 JP H0543238B2 JP 61278727 A JP61278727 A JP 61278727A JP 27872786 A JP27872786 A JP 27872786A JP H0543238 B2 JPH0543238 B2 JP H0543238B2
- Authority
- JP
- Japan
- Prior art keywords
- mobile station
- time
- station
- electric field
- line control
- 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 - Fee Related
Links
- 230000005684 electric field Effects 0.000 claims description 21
- 230000005540 biological transmission Effects 0.000 claims description 14
- 238000010295 mobile communication Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は公衆自動車電話システムに係り、特に
送話時のみに送信電波を発射する機能
（Discontenuous Transmision：以下、DTX機能
とする）を有する移動局を含むシステムにおける
移動通信方式に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a public mobile telephone system, and particularly to a mobile telephone system having a function of emitting transmission radio waves only when making a call (discontinuous transmission: hereinafter referred to as DTX function). It relates to a mobile communication system in a system including stations.
従来、この種の移動局を含む公衆自動車電話シ
ステムにおいては、移動局は電池を使用する携帯
形であり、使用時間を延すため、下り電波は常時
受信するが、上り電波は送信時のみに発射してい
た。
Conventionally, in public car telephone systems that include this type of mobile station, the mobile station is a portable type that uses batteries, and in order to extend the usage time, downlink radio waves are always received, but uplink radio waves are only received when transmitting. It was firing.
そして、移動局話者が無音となり、上り電波が
停止したとき、一定時間経過後に移動局が使用中
であることおよび該当のサービスエリア内に存在
することを確認するため試験電波の送出要求を回
線制御局が無線基地局経由でその移動局に送出し
ていた。 When the mobile station speaker becomes silent and uplink radio waves stop, after a certain period of time a request to send out test radio waves is sent to the line to confirm that the mobile station is in use and is within the applicable service area. The control station was transmitting to the mobile station via the wireless base station.
上述した従来の公衆自動車電話システムでは、
上り電波停止から試験電波送出要求までの時間は
一定であり、その時間を短く設定すれば、移動局
の電池寿命が短くなることから、携帯形移動局で
ありかつ人間の移動速度を考慮して１〜２分程度
の時間に設定されていた。
In the conventional public car phone system mentioned above,
The time from the uplink radio wave stop to the test radio wave transmission request is constant, and if the time is set short, the mobile station's battery life will be shortened. The time was set to about 1 to 2 minutes.
そして、サービスエリア境界付近を無音でかつ
自動車などによつて高速で通過する場合には、上
記時間内ではサービスエリア外に出てしまい、試
験電波送出信号が移動局で受信できず、回線制御
局側では移動局の存在するサービスエリアが確定
できないことから、追跡交換を行うことができ
ず、回線が断になるという問題点があつた。 If a vehicle, etc., passes silently near the service area boundary at high speed, it will be outside the service area within the above time, and the test radio wave transmission signal will not be received by the mobile station, and the line control station will be unable to receive the test radio wave transmission signal. Since the service area in which the mobile station was located could not be determined on the side, tracking and exchange could not be carried out, leading to the problem that the line would be disconnected.
本発明の移動通信方式は、複数の無線基地局と
回線制御局および送話時のみに送信電波を発射す
る移動局から構成され、前記移動局が一定時間送
信出力を停止したとき上記回線制御局がその移動
局に対し試験電波の発射を要求する公衆自動車電
話システムにおいて、上記無線基地局の受信電界
を測定する手段と、上記受信電界に対応して移動
局話者が無音となつたときから試験電波の発射要
求までの時間を可変する手段とを備え、受信入力
電界が弱いときには上記時間を短く設定するよう
にしたものである。
The mobile communication system of the present invention is composed of a plurality of radio base stations, a line control station, and a mobile station that emits transmission radio waves only when transmitting a call, and when the mobile station stops transmitting output for a certain period of time, the line control station In a public mobile phone system in which a mobile station requests the mobile station to emit test radio waves, a means for measuring the received electric field of the wireless base station, and from when the mobile station speaker becomes silent in response to the received electric field. The apparatus includes means for varying the time until a test radio wave emission request is made, and the time is set short when the receiving input electric field is weak.
本発明においては、DTX機能を有する移動局
がサービスエリアの境界付近を無音で送信送出を
停止したまま高速で移動するときに、試験電波の
発射要求間隔を無線基地局の受信電界に応じて変
化させる。
In the present invention, when a mobile station with a DTX function moves silently near the boundary of a service area at high speed while stopping transmission, the test radio wave emission request interval is changed according to the received electric field of the wireless base station. let
以下、図面に基づき本発明の実施例を詳細に説
明する。
Hereinafter, embodiments of the present invention will be described in detail based on the drawings.
第１図は本発明の一実施例を示す構成図で、本
発明を適用した公衆自動車電話システムの構成例
を示すものである。 FIG. 1 is a block diagram showing one embodiment of the present invention, and shows an example of the structure of a public automobile telephone system to which the present invention is applied.
図において、１，２は無線基地局、３は送話時
のみに送信電波を発射する移動局、４は回線制御
局である。また、５，６は境界を示し、７は経
路、８，９…１２は地点を示す。 In the figure, 1 and 2 are radio base stations, 3 is a mobile station that emits transmission radio waves only when transmitting a call, and 4 is a line control station. Further, 5 and 6 indicate boundaries, 7 indicates routes, and 8, 9...12 indicate points.
そして、この第１図に示す公衆自動車電話シス
テムは、複数の無線基地局１，２と回線制御局４
および送話時のみに送信電波を発射する移動局３
から構成され、その移動局３が一定時間送信出力
を停止したとき回線制御局４が移動局３に対し試
験電波の発射を要求するように構成されている。 The public car telephone system shown in FIG. 1 includes a plurality of wireless base stations 1 and 2 and a line control station 4.
and a mobile station 3 that emits transmission radio waves only when transmitting a call.
When the mobile station 3 stops transmitting output for a certain period of time, the line control station 4 requests the mobile station 3 to emit test radio waves.
また、無線基地局１，２は、それぞれ無線基地
局の受信電界を測定する手段と上記受信電界に対
応して移動局話者が無音となつたときから試験電
波の発射要求までの時間を可変する手段とを備
え、受信入力電界が弱いときには上記時間を短く
設定するように構成されている。 In addition, the radio base stations 1 and 2 each have a means for measuring the received electric field of the radio base station and a variable time corresponding to the above-mentioned received electric field from the time when the mobile station speaker becomes silent until the test radio wave emission request. and is configured to set the above-mentioned time short when the received input electric field is weak.
つぎにこの第１図に示す実施例の動作を第２図
を参照して説明する。 Next, the operation of the embodiment shown in FIG. 1 will be explained with reference to FIG. 2.
無線基地局１，２はそれぞれ境界５，６で囲ま
れるサービスエリアを受持つ。そして、移動局３
が経路７上を地点８まで送話し、地点８から地点
１２まで無音で移動する。ここで、無線基地局
１，２における移動局３からの電波の受信電界強
度は、回線制御局４に集められ、回線の制御に使
用される。 Radio base stations 1 and 2 are in charge of service areas surrounded by boundaries 5 and 6, respectively. And mobile station 3
transmits a message along route 7 to point 8, and moves silently from point 8 to point 12. Here, the received field strength of radio waves from the mobile station 3 at the radio base stations 1 and 2 is collected by the line control station 4 and used for line control.
第２図は回線制御局４に集められた移動局３の
受信電界強度信号の最大値の経時変化を示す説明
図で、受信電界強度３２はサービスエリア境界を
意味し、受信電界強度３３は通話の限界を意味す
る。そして、３１は基準電界強度を示し、２１，
２２…３０は時刻、３４，３５…４２は受信電界
強度を示す。 FIG. 2 is an explanatory diagram showing the change over time in the maximum value of the received field strength signals of the mobile stations 3 collected at the line control station 4, where the received field strength 32 means the service area boundary, and the received field strength 33 indicates the call means the limit of 31 indicates the reference electric field strength; 21,
22...30 indicate time, and 34, 35...42 indicate received electric field strength.
まず、移動局３は前述したように、地点８まで
送話をしながら移動しているため地点８に到達し
た時刻２１までは、回線制御局４では無線基地局
１の受信電界が最大で移動局３が連続送信してい
ることから、受信電界強度３２以上が連続して得
られている。そして、地点８に到達したとき移動
局３は無音となり、送信出力が停止される。 First, as mentioned above, since mobile station 3 is moving while transmitting to point 8, until time 21 when it reaches point 8, at line control station 4, the receiving electric field of radio base station 1 is at its maximum and moving. Since station 3 is transmitting continuously, a received field strength of 32 or higher is continuously obtained. When the mobile station 3 reaches the point 8, it becomes silent and the transmission output is stopped.
つぎに、回線制御局４は、無線基地局１におけ
る受信電界強度が、受信電界強度３２以下となつ
たが、隣接する無線基地局２でも同様の受信電界
であることから、移動局３は送信出力を停止した
と判断し、時刻２１より所定の時間t1経過後の時
刻２２に移動局３が送信出力を停止したままであ
るため、試験電波の発射要求を送出する。そし
て、移動局３は上記の発射要求に応答し試験電波
を一定時間発射するため、回線制御局４は無線基
地局１からの受信電界強度３４を経て、移動局３
が無音であるが通話中であり、無線基地局１のエ
ービスエリア内に存在することを確認する。 Next, the line control station 4 determines that the received field strength at the wireless base station 1 has become 32 or less, but since the received field strength is similar at the adjacent wireless base station 2, the mobile station 3 transmits It is determined that the output has been stopped, and at time 22 after a predetermined time t 1 has elapsed from time 21, the mobile station 3 sends a test radio wave emission request because the transmission output is still stopped. Then, in response to the above-mentioned emission request, the mobile station 3 emits a test radio wave for a certain period of time, so the line control station 4 transmits the test radio wave to the mobile station 3 via the received field strength 34 from the radio base station 1.
Although there is no sound, it is confirmed that the call is in progress and that the wireless base station 1 is within the service area of the wireless base station 1.
同様にして、移動局３が地点８から地点９に移
動するとき時間t1の間隔で、すなわち、時刻２
３，２４において、移動局３が回線制御局４の要
求により試験電波を発射するが、時刻２４におい
ては、回線制御局４は受信電界強度３６を検出
し、基準電界強度３１より低いことから、時刻２
４以降は、時間t2（t2＜t1）の間隔で試験電波の発
射を要求する。そして、移動局３がサービスエリ
ア境界である地点１０に達したとき、すなわち、
時刻２５において発射された試験電波に対して回
線制御局４は受信電界強度３７を検出し、無線基
地局１のサービスエリア外へ移動したとして、移
動局３に対し回線切替に必要な時間送信電波を発
射させ、隣接する無線基地局２に対して移動局３
の監視を行い、無線基地局２のサービスエリア内
へ移動したことを判断して回線の追跡交換を行
う。 Similarly, when mobile station 3 moves from point 8 to point 9, at an interval of time t1 , that is, at time 2
At time 3 and 24, the mobile station 3 emits a test radio wave at the request of the line control station 4, but at time 24, the line control station 4 detects the received electric field strength 36, which is lower than the reference electric field strength 31. Time 2
From 4 onwards, test radio waves are requested to be emitted at intervals of time t 2 (t 2 <t 1 ). Then, when the mobile station 3 reaches the point 10 which is the service area boundary, that is,
The line control station 4 detects the received field strength 37 for the test radio wave emitted at time 25, and assumes that the mobile station 4 has moved out of the service area of the radio base station 1. The mobile station 3 sends a message to the adjacent wireless base station 2.
It monitors the wireless base station 2, determines that it has moved into the service area of the wireless base station 2, and performs line tracking and exchange.
したがつて、時刻２６以降は移動局３は、無線
基地局２を介して回線を構成するが、この無線基
地局２から回線制御局４へ送出される受信電界強
度３８，３９は基準電界強度３１より低いことか
ら、時間t2間隔で試験電波を発射し、時刻２８，
２９，３０の地点では受信電界強度４０，４１，
４２の各値が回線制御局４へ送出されるため、時
刻２８以降は時間t1の間隔で試験電波を発射す
る。 Therefore, after time 26, the mobile station 3 configures a line via the radio base station 2, but the received electric field strengths 38 and 39 sent from the radio base station 2 to the line control station 4 are the reference electric field strength. Since it is lower than 31, test radio waves are emitted at time t 2 intervals, and at time 28,
At points 29 and 30, the received electric field strength is 40, 41,
Since each value of 42 is sent to the line control station 4, test radio waves are emitted at intervals of time t1 from time 28 onwards.
そして、この時間t1は移動局３の電池寿命を、
また、時間t2は基準電界強度３１を下廻つてか
ら、通話の限界である受信電界強度３３に達する
時間、すなわち、移動局３の移動速度を考慮して
最適な値に設定することができる。 And this time t 1 is the battery life of mobile station 3,
In addition, the time t 2 can be set to an optimal value by taking into account the time from which the field strength falls below the reference field strength 31 to the received field strength 33, which is the limit for communication, that is, the speed of movement of the mobile station 3. .
なお、上記実施例では、基準電界強度３１を基
に、試験電波の発射要求間隔を時間t1，t2の２値
で切替を行う場合を例にとつて説明したが、本発
明はこれに限定されるものではなく、移動局３の
電池容量および移動速度を考慮して２値以上の多
値の切替を行うことおよびその時間に特に制限は
ない。 In the above embodiment, the case where the test radio wave emission request interval is switched between two values of time t 1 and t 2 based on the reference electric field strength 31 was explained as an example, but the present invention is not limited to this. The present invention is not limited to this, and there is no particular restriction on the switching time and the switching between two or more values in consideration of the battery capacity and moving speed of the mobile station 3.
以上説明したように、本発明によれば、DTX
機能を有する移動局がサービスエリアの境界付近
を無音で送信出力を停止したまま高速で移動する
ときに、試験電波の発射要求間隔を無線基地局の
受信電界に応じ変化させることにより、追跡交換
が可能となり、回線が断となる確率を大幅に低減
できるので、実用上の効果は極めて大である。
As explained above, according to the present invention, DTX
When a functional mobile station moves silently near the boundary of a service area at high speed with its transmission output stopped, tracking and exchange can be performed by changing the test radio wave transmission request interval according to the received electric field of the wireless base station. This has an extremely large practical effect, since the probability that the line will be disconnected can be greatly reduced.
第１図は本発明の一実施例を示す構成図、第２
図は第１図の動作説明に供する受信電界強度の経
時変化を示す説明図である。
１，２……無線基地局、３……移動局、４……
回線制御局、５，６……境界、７……経路、８〜
１２……地点。
FIG. 1 is a configuration diagram showing one embodiment of the present invention, and FIG.
The figure is an explanatory diagram showing a change in received electric field strength over time to explain the operation of FIG. 1. 1, 2... Wireless base station, 3... Mobile station, 4...
Line control station, 5, 6...boundary, 7...route, 8~
12...point.
Claims (1)
のみに送信電波を発射する移動局から構成され、
前記移動局が一定時間送信出力を停止したとき前
記回線制御局が該移動局に対し試験電波の発射を
要求する公衆自動車電話システムにおいて、前記
無線基地局の受信電界を測定する手段と、前記受
信電界に対応して移動局話者が無音となつたとき
から試験電波の発射要求までの時間を可変する手
段とを備え、受信入力電界が弱いときには前記時
間を短く設定するようにしたことを特徴とする移
動通信方式。1 Consists of multiple radio base stations, a line control station, and a mobile station that emits transmission radio waves only when transmitting a call.
In a public automobile telephone system in which the line control station requests the mobile station to emit a test radio wave when the mobile station stops transmitting output for a certain period of time, means for measuring a received electric field of the radio base station; It is characterized by comprising means for varying the time from when the mobile station speaker becomes silent to when the test radio wave is requested to be emitted in response to the electric field, and the time being set short when the receiving input electric field is weak. A mobile communication system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61278727A JPS63132537A (en) | 1986-11-25 | 1986-11-25 | Mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61278727A JPS63132537A (en) | 1986-11-25 | 1986-11-25 | Mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63132537A JPS63132537A (en) | 1988-06-04 |
| JPH0543238B2 true JPH0543238B2 (en) | 1993-07-01 |
Family
ID=17601357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61278727A Granted JPS63132537A (en) | 1986-11-25 | 1986-11-25 | Mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63132537A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5444766A (en) * | 1993-10-01 | 1995-08-22 | At&T Corp. | Mobile-synchronized handoff in a wireless communications system |
| US7054284B2 (en) * | 1999-06-23 | 2006-05-30 | Qualcomm, Incorporated | Method and apparatus for supervising a potentially gated signal in a wireless communication system |
-
1986
- 1986-11-25 JP JP61278727A patent/JPS63132537A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63132537A (en) | 1988-06-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |