JPH02256331A - Radio communication system - Google Patents

Radio communication system

Info

Publication number
JPH02256331A
JPH02256331A JP1077169A JP7716989A JPH02256331A JP H02256331 A JPH02256331 A JP H02256331A JP 1077169 A JP1077169 A JP 1077169A JP 7716989 A JP7716989 A JP 7716989A JP H02256331 A JPH02256331 A JP H02256331A
Authority
JP
Japan
Prior art keywords
level
base station
mobile station
transmission
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1077169A
Other languages
Japanese (ja)
Inventor
Yoshinori Seki
良則 関
Junji Tada
順次 多田
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP1077169A priority Critical patent/JPH02256331A/en
Publication of JPH02256331A publication Critical patent/JPH02256331A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

Abstract

PURPOSE:To save the power consumption by deciding a level of a connection request signal, returning the result and allowing plural mobile stations to control transmission power in response to a level data when a base station receives a connection request signal from one of the plural stations. CONSTITUTION:A mobile station 20 sends a connection request signal S1 at a minimum transmission level from a transmission section 23 and increases sequentially the transmission level up to a maximum level till a reply comes from a base station 10. When the base station 10 detects a connection request signal S1 addressed to its own station at its reception section, the reception section decides (15) a reception level at that point of time by a level deciding control section 15, and returns a connection reply signal S2 from a transmission section 13 via a control section 14 corresponding to the reception level. The mobile station 20 controls the power to a transmission power corresponding to the reception level included in the connection reply signal S2 by a control section 24 and the communication is started via the transmission section 23 and a power control circuit 25. When the transmission power of the mobile station 20 is a maximum, an annunciator 26 displays the power. Thus, the mobile station 20 is prevented from being stepped out of the service area of the base station and the transmission power consumption is saved.

Description

【発明の詳細な説明】 ［産業上の利用分野］ この発明は、例えば、構内のベージングシステムとして
用いられる無線個別呼び出し装置等に適用され、基地局
より複数の移動局に対してマルチチャネルアクセス方式
により電線通信を行なう無線通信システムに間する。Detailed Description of the Invention [Industrial Application Field] The present invention is applied to, for example, a wireless individual paging device used as an in-premises paging system, and provides multi-channel access from a base station to a plurality of mobile stations. This method is used for wireless communication systems that perform wire communication.

［従来の技術］ 第４図は、従来のマルチチャネルアクセス方式による無
線通信システムにおける基地局と移動局の構成を示して
いる。[Prior Art] FIG. 4 shows the configuration of a base station and a mobile station in a wireless communication system using a conventional multi-channel access method.

同図において、１０は基地局であり、１１はアンテナ、
１２は受信部、　１３は送信部、１４は制御部である。In the figure, 10 is a base station, 11 is an antenna,
12 is a receiving section, 13 is a transmitting section, and 14 is a control section.

制御部１４では、受信部１２および送（８部１３の切り
換え、データ処理等が１テなねれる。The control section 14 controls switching of the receiving section 12 and the transmitting section 13, data processing, etc.

また、２０は移動局であり、２］はアンテナ、２２は受
信部、２３は送信部、２４は制御部である。制御部２４
では、受信部２２および送信部２３の切り換え、データ
処理等が行なわれる。Further, 20 is a mobile station, 2] is an antenna, 22 is a receiving section, 23 is a transmitting section, and 24 is a control section. Control unit 24
Then, switching between the receiving section 22 and the transmitting section 23, data processing, etc. are performed.

このような無線通信システムにおいて、移動局２０と基
地局１０の通信は、以下のようにして行なわれる。In such a wireless communication system, communication between the mobile station 20 and the base station 10 is performed as follows.

第５図に示すように、まず移動局２０の送信部２３より
制御用周波数で接続要求信号Ｓ１が基地局１０に送信さ
れる。As shown in FIG. 5, first, a connection request signal S1 is transmitted from the transmitter 23 of the mobile station 20 to the base station 10 at a control frequency.

移動局２０が基地局１０のサービスエリア内にいるとき
は、移動局２０からの接続要求信号Ｓ１が基地局１０の
受信部１２を介して制御部１４に供給され、この制御部
１４で接続要求信号Ｓｌが基地局１０に対するものであ
るか否かが判断される。基地局１０に対するものである
と判断されると、この基地局１０の送信部１３より接続
応答信号Ｓ２が移動局２０に送ＩＭされる。そして、こ
の接続応答信号Ｓ２が移動局２０の受信部２２を介して
制御部２４に供給される。これにより、移動局２０と基
地局１０との通信が開始される。When the mobile station 20 is within the service area of the base station 10, a connection request signal S1 from the mobile station 20 is supplied to the control unit 14 via the reception unit 12 of the base station 10, and the control unit 14 issues a connection request signal S1. It is determined whether the signal Sl is for the base station 10 or not. If it is determined that the connection is to the base station 10, the transmission unit 13 of the base station 10 transmits a connection response signal S2 to the mobile station 20 (IM). This connection response signal S2 is then supplied to the control section 24 via the receiving section 22 of the mobile station 20. As a result, communication between the mobile station 20 and the base station 10 is started.

一方、移動局２０が基地局】０のサービスエリア内にい
ないときは、基地局１０は移動局２０からの接続要求信
号Ｓ１を受信できない。そのため、基地局１０からは接
続応答信号Ｓ２が送信されず、移動局２０は接続応答信
号Ｓ２を受信することができない。これにより、移動局
２０と基地局１０との通信は開始されない。On the other hand, when the mobile station 20 is not within the service area of the base station 0, the base station 10 cannot receive the connection request signal S1 from the mobile station 20. Therefore, the base station 10 does not transmit the connection response signal S2, and the mobile station 20 cannot receive the connection response signal S2. As a result, communication between the mobile station 20 and the base station 10 is not started.

［発明が解決しようとする課題］ このように、第４図例によれば、単に、移動局２０が基
地局１０のサービスエリア内にいて、移動局２０が基地
局１０からの接続応答信号ｓ２を受信することにより通
信が開始されるものである。[Problems to be Solved by the Invention] As described above, according to the example in FIG. Communication is started by receiving the .

つまり、移動局２０は自局の位置を確認することができ
ないため、移動局２０が基地局１０との通信中にサービ
スエリア外に出て通信が中断してしまうことがあり、デ
ータ通信の効率を悪くしている。In other words, since the mobile station 20 cannot confirm its own location, the mobile station 20 may move out of the service area during communication with the base station 10 and the communication may be interrupted, resulting in data communication efficiency. It's making things worse.

そこで、この発明では、上述不都合を除去して効率のよ
いデータ通信ができるようにすることを目的とするもの
である。Therefore, it is an object of the present invention to eliminate the above-mentioned disadvantages and to enable efficient data communication.

［課題を解決するための手段〕 この発明は、基地局より複数の移動局に対してマルチチ
ャネルアクセス方式により無線通信を行なう兼線通信シ
ステムであって、 上記基地局には、上記移動局より送信される制御信号の
受信レベルを判定するレベル判定手段と、このレベル判
定手段で判定されるレベルデータを送信する手段とを備
え、 上記移動局には、上記基地局より送信されるしベルデー
タに応じて送信レベルを制御するパワーコントロール手
段と、この送信レベルが最大であることを報知する報知
手段とを備えるものである。[Means for Solving the Problems] The present invention provides a dual-line communication system in which a base station performs wireless communication with a plurality of mobile stations using a multi-channel access method, wherein the base station has access to a plurality of mobile stations. The mobile station is equipped with a level determining means for determining the received level of a control signal to be transmitted, and a means for transmitting level data determined by the level determining means, and the mobile station is configured to receive level data transmitted from the base station. The transmitter includes a power control means for controlling the transmission level according to the transmission level, and a notification means for notifying that the transmission level is the maximum.

［作　用］ 上述構成においては、移動局の送信レベルが最大となっ
て、基地局が自局の最大の通信エリアでのみカバーでき
る位置にある場合、これが移動局のユーザーに報知され
るので、移動局が通信中に基地局のサービスエリア外に
出て通信が中断するということを良好に回避し得る。[Function] In the above configuration, when the mobile station's transmission level is at its maximum and the base station is in a position where it can only cover its own maximum communication area, this is reported to the mobile station user. This can effectively prevent communication from being interrupted when the mobile station moves out of the base station's service area during communication.

また、移動局の送信レベルは、基地局より送信されるレ
ベルデータに応じて、つまり自局の位置に応じて制御さ
れ、常に最大の送信レベルで送信されるものではないの
で、消ａＸ力を節約し導る。Furthermore, the transmission level of the mobile station is controlled according to the level data transmitted from the base station, that is, according to the position of the mobile station, and it is not always transmitted at the maximum transmission level. Save and lead.

［実　施　例］ 以下、第１図を参照しながら、この発明の一実施例につ
いて説明する。この第１図において、第４図と対応する
部分には同一符号を付し、その詳細説明は省略する。[Embodiment] An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, parts corresponding to those in FIG. 4 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

同図において、基地局１０には、受信レベルを判定する
レベル判定回路１５が備えられ、この判定回路１５から
の受信レベルを示すレベルデータは制御部１４に供給さ
れる。In the figure, the base station 10 is equipped with a level determination circuit 15 that determines the reception level, and level data indicating the reception level from the determination circuit 15 is supplied to the control unit 14.

また、移動局２０には、送信レベルを制御するパワーコ
ントロール回路２５が備えられる。本例においては、第
２図に示すように、ゾーンＺｌ。Furthermore, the mobile station 20 is equipped with a power control circuit 25 that controls the transmission level. In this example, as shown in FIG. 2, zone Zl.

Ｚ２．Ｚ３内を通信エリアとするように、制御部２４で
パワーコントロール回路２５が操作されて、送信レベル
がレベル１．　２．　３の３段階に切り換えられる。な
お、同図において、ゾーンＺ４は基地局１０のサービス
エリアを示しており、基地局１０の送信レベルは移動局
２０の送信レベルより大きい。Z2. The power control circuit 25 is operated by the control unit 24 so that the communication area is within Z3, and the transmission level is set to level 1. 2. It can be switched to 3 stages. Note that in the figure, zone Z4 indicates the service area of the base station 10, and the transmission level of the base station 10 is higher than the transmission level of the mobile station 20.

また、この移動局２０には、送信レベルが最大であるこ
とを報知する報知装置２６が備えられる。Furthermore, this mobile station 20 is equipped with a notification device 26 that notifies that the transmission level is the maximum.

この報知装置２６は、制御部２４で操作され、例えばブ
ザー等のように聴覚的なもの、あるいはＬＥＤ等のよう
に視覚的なもので構成される。This notification device 26 is operated by the control unit 24, and is composed of, for example, an auditory device such as a buzzer, or a visual device such as an LED.

第３図は、移動局２０より送信される接続要求信号Ｓ１
および基地局１０より送信される接続応答信号Ｓ２の信
号フォーマットを示している。つまり、これらの信号５
１．５２は、ビット同期信号、フレーム同期信号、基地
局を特定する基地局ＩＤ、移動局を特定する移動局ＩＤ
、レベルデータ、チャネルデータとから構成される。こ
の場合、１言号Ｓ１におけるレベルデータは、例えば送
１言レベルを示すデータとされ、−力信号Ｓ２における
しベルデータは、後述するように受信レベルを示すデー
タとされる。FIG. 3 shows a connection request signal S1 transmitted from the mobile station 20.
and the signal format of the connection response signal S2 transmitted from the base station 10. That is, these signals 5
1.52 is a bit synchronization signal, a frame synchronization signal, a base station ID that identifies a base station, and a mobile station ID that identifies a mobile station.
, level data, and channel data. In this case, the level data for one word S1 is, for example, data indicating the level of one transmitted word, and the level data for the -power signal S2 is data indicating the reception level, as will be described later.

本例は以上のように構成され、移動局２０と基地局１０
との通信は、以下のようにして行なわれる。This example is configured as described above, and includes the mobile station 20 and the base station 10.
Communication with is performed as follows.

まず、移動局２０の送信部２３よりレベル１の送信レベ
ルで接続要求信号Ｓｌが基地局１０に送信される。First, the transmission unit 23 of the mobile station 20 transmits a connection request signal Sl to the base station 10 at a transmission level of level 1.

基地局１０が移動局２０の通信エリア内にあるとき、例
えば移動局２０が第２図に示す位置にいるときには、移
動局２０からの接続要求信号Ｓｌは基地局１０で受信で
きない。そのため、基地局１０からは接続応答信号Ｓ２
が送信されず、移動局２０は規定時間内に接続応答信号
Ｓ２を受信できない。When the base station 10 is within the communication area of the mobile station 20, for example when the mobile station 20 is in the position shown in FIG. 2, the base station 10 cannot receive the connection request signal Sl from the mobile station 20. Therefore, the base station 10 sends a connection response signal S2
is not transmitted, and the mobile station 20 cannot receive the connection response signal S2 within the specified time.

そのため、移動局２０の制御部２４ては、自局の送信レ
ベルが低いと判断し、続いてレベル２の送信レベルで接
続要求信号Ｓ１が基地局１０に送信される。移動局２０
からの接続要求信号Ｓ１は基地局１０の受信部１２を介
して制御部１４に供給され、この制御部１４で接続要求
信号Ｓｔが自局に対するものであるかが基地局ＩＤによ
って確認される。自局に対するものであるときには、レ
ベル判定回路】５によって受信レベルが判定され、接続
応答信号Ｓ２のレベルデータがこの受信レベルにセット
される。そして、この基地局１０の送信部１３より接続
応答信号Ｓ２が移動局２０に送信される。基地局１０か
らの接続応答信号Ｓ２が移動局２０の受信部２２を介し
て制御部２４に供給され、この制御部２４で接続応答信
号Ｓ２が自局に対するものであるかが移動局ＩＤによっ
て確認される。自局に対するものであるときには、レベ
ルデータが判定される。そして、送信レベルを切り換え
る必要がない場合には、その送信レベルによって基地局
ｌＯとの通信が開始される。送信レベルを切り換える必
要がある場合には、パワーコントロール回路２５によっ
て送信レベルがレベル３に切り換えられたのち基地局１
０との通信が開始される。この場合、報知装置２６によ
って、送信レベルがレベル３、つまり基地局１０の位置
が自局の最大の通信エリアでのみカバーできる位置にあ
ることが報知される。Therefore, the control unit 24 of the mobile station 20 determines that the transmission level of its own station is low, and subsequently transmits the connection request signal S1 to the base station 10 at the transmission level of level 2. Mobile station 20
The connection request signal S1 from the base station 10 is supplied to the control section 14 via the receiving section 12 of the base station 10, and the control section 14 confirms whether the connection request signal St is for the own station based on the base station ID. When the signal is for the own station, the level judgment circuit 5 judges the reception level, and the level data of the connection response signal S2 is set to this reception level. Then, the connection response signal S2 is transmitted from the transmitter 13 of the base station 10 to the mobile station 20. The connection response signal S2 from the base station 10 is supplied to the control unit 24 via the reception unit 22 of the mobile station 20, and the control unit 24 checks whether the connection response signal S2 is for the own station using the mobile station ID. be done. If it is for the own station, the level data is determined. If there is no need to switch the transmission level, communication with the base station IO is started at that transmission level. When it is necessary to switch the transmission level, the power control circuit 25 switches the transmission level to level 3, and then the base station 1
Communication with 0 begins. In this case, the notification device 26 reports that the transmission level is level 3, that is, the base station 10 is located at a position that can only be covered by the maximum communication area of the base station.

基地局１０が移動局２０の通信エリア内にあり、移動局
２０が第２図に示す位置にいないときにも、同様にして
基地局ＩＯとの通信が開始される。Even when the base station 10 is within the communication area of the mobile station 20 and the mobile station 20 is not at the position shown in FIG. 2, communication with the base station IO is started in the same manner.

一方、基地局ｌＯが移動局２０の通信エリア内にないと
きは、基地局１０は移動局２０からの接続要求信号Ｓｌ
を受信することができない。そのため、基地局ｌＯから
は接続応答信号Ｓ２が送信されず、移動局２０は接続応
答信号Ｓ２を受信することができない。そのため、移動
局２０との通信は開始されない。On the other hand, when the base station IO is not within the communication area of the mobile station 20, the base station 10 receives the connection request signal Sl from the mobile station 20.
cannot be received. Therefore, the connection response signal S2 is not transmitted from the base station IO, and the mobile station 20 cannot receive the connection response signal S2. Therefore, communication with the mobile station 20 is not started.

このように本例によれば、移動局２０の送信レベルが最
大、つまり、基地局１０の位置が自局の最大の通信エリ
アでのみカバーできる位置にある場合、これが報知され
る。したがって、移動局が通信中に基地局１０のサービ
スエリア外に出て通信が中断するということを回避する
ことができ、効率よくデータ通信を行なうことができる
。As described above, according to this example, when the transmission level of the mobile station 20 is maximum, that is, when the base station 10 is located at a position that can only be covered by the maximum communication area of the mobile station, this is broadcast. Therefore, it is possible to avoid interruption of communication due to the mobile station moving out of the service area of base station 10 during communication, and data communication can be performed efficiently.

また、移動局２０の送信レベルは、基地局１０より送信
されるレベルデータに応じて、つまり自局の位置に応じ
て制御され、常に最大の送信レベルで送信されるもので
ないので、消費電力の節約を図ることができる。Furthermore, the transmission level of the mobile station 20 is controlled according to the level data transmitted from the base station 10, that is, according to the position of the mobile station, and it is not always transmitted at the maximum transmission level, so power consumption is reduced. You can save money.

なお、上述実施例においては、移動局２０の送信レベル
は３段階に切り換えられるものを示したが、段階は３段
階に限定されるものではない。また、上述実施例におい
ては、送信レベルを小さい方から大きい方に順に切り換
えられるものであるが、この逆に切り喚えて、最終的に
必要最小限の送信レベルとなるようにしてもよい。Note that in the above embodiment, the transmission level of the mobile station 20 is shown to be switched in three stages, but the stages are not limited to three stages. Further, in the above-described embodiment, the transmission level is switched in order from the lowest to the highest, but it may be switched in the opposite direction so that the minimum required transmission level is finally reached.

［発明の効果］ 以上説明したように、この発明によれば、基地局が自局
の最大の通信エリアでのみカバーできる位置にある場合
、これが移動局のユーザーに報知されるので、移動局が
通信中に基地局のサービスエリア外に出て通信が中断す
るということを回避することができ、効率のよいデータ
通信を行なうことができる。また、移動局の送信レベル
は、基地局より送信されるレベルデータに応じて、つま
り自局の位置に応じて制御され、常に最大の送信レベル
で送信されるものではないので、消費電力の節約を図る
ことができる。[Effects of the Invention] As explained above, according to the present invention, when a base station is located at a position that can only be covered by its own maximum communication area, this is reported to the mobile station user, so that the mobile station can It is possible to avoid interruption of communication due to going outside the service area of the base station during communication, and it is possible to perform efficient data communication. In addition, the transmission level of the mobile station is controlled according to the level data transmitted from the base station, that is, according to the position of the mobile station, and it is not always transmitted at the maximum transmission level, which saves power consumption. can be achieved.

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

第１図はこの発明の一実施例を示す構成図、第２図はそ
の動作説明図、第３図は接続要求信号および接続応答信
号の信号フォーマットを示す図、第４図は従来例の構成
図、第５図はその動作説明図である。 ｌ　Ｏ・ １１　・ Ｉ　２　φ １３　・ ｌ　４　・ １５　・ ２０　番 ２　ｌ　・ ２２　Φ ２３　・ ２４　・ ２５　拳 ２６　＃ ・基地局 ・アンテナ ・受信部 ・送信部 ・制御部 ・レベル判定回路 ・移動局 ・アンテナ ・受信部 ・送信部 ・制御部部 ・パワーコントａ−小回路 ・ｆＦＪ知装置FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of its operation, FIG. 3 is a diagram showing the signal format of a connection request signal and a connection response signal, and FIG. 4 is a configuration of a conventional example. FIG. 5 is an explanatory diagram of the operation. l O・ 11 ・ I 2 φ 13 ・ l 4 ・ 15 ・ No. 20 2 l ・ 22 Φ 23 ・ 24 ・ 25 Fist 26 # ・Base station, antenna, receiving section, transmitting section, control section, level judgment circuit, movement Station, antenna, receiving section, transmitting section, control section, power control a-small circuit, fFJ knowledge device

Claims (1)

【特許請求の範囲】[Claims] （１）基地局より複数の移動局に対してマルチチャネル
アクセス方式により無線通信を行なう無線通信システム
において、 上記基地局には、上記移動局より送信される制御信号の
受信レベルを判定するレベル判定手段と、このレベル判
定手段で判定されるレベルデータを送信する手段とを備
え、 上記移動局には、上記基地局より送信されるレベルデー
タに応じて送信レベルを制御するパワーコントロール手
段と、この送信レベルが最大であることを報知する報知
手段とを備えることを特徴とする無線通信システム。(1) In a wireless communication system in which a base station performs wireless communication with multiple mobile stations using a multi-channel access method, the base station has a level determination function that determines the reception level of a control signal transmitted from the mobile station. and a means for transmitting the level data determined by the level determining means, and the mobile station includes a power control means for controlling the transmission level according to the level data transmitted from the base station, and a power control means for controlling the transmission level according to the level data transmitted from the base station. 1. A wireless communication system comprising: notification means for notifying that the transmission level is at a maximum.
JP1077169A 1989-03-29 1989-03-29 Radio communication system Pending JPH02256331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1077169A JPH02256331A (en) 1989-03-29 1989-03-29 Radio communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1077169A JPH02256331A (en) 1989-03-29 1989-03-29 Radio communication system

Publications (1)

Publication Number Publication Date
JPH02256331A true JPH02256331A (en) 1990-10-17

Family

ID=13626290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1077169A Pending JPH02256331A (en) 1989-03-29 1989-03-29 Radio communication system

Country Status (1)

Country Link
JP (1) JPH02256331A (en)

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