JPH07170558A - Radio channel connection method - Google Patents

Radio channel connection method

Info

Publication number
JPH07170558A
JPH07170558A JP5341200A JP34120093A JPH07170558A JP H07170558 A JPH07170558 A JP H07170558A JP 5341200 A JP5341200 A JP 5341200A JP 34120093 A JP34120093 A JP 34120093A JP H07170558 A JPH07170558 A JP H07170558A
Authority
JP
Japan
Prior art keywords
station
fixed
mobile radio
radio station
stations
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
JP5341200A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kitamoto
博之 北本
Takeshi Ono
剛 大野
Masanori Okuno
正則 奥野
Hiroyuki Mitsui
裕之 三井
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.)
Kokusai Electric Corp
Original Assignee
Kokusai Electric 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 Kokusai Electric Corp filed Critical Kokusai Electric Corp
Priority to JP5341200A priority Critical patent/JPH07170558A/en
Publication of JPH07170558A publication Critical patent/JPH07170558A/en
Pending legal-status Critical Current

Links

Landscapes

  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To reduce a channel connection time between a master controller conducting channel control and an optional mobile radio station in a small power radio telephone system consisting of plural stationary radio stations connected to the master controller through wiring and arranged distributingly and mobile radio stations within their service area. CONSTITUTION:Plural stationary radio stations arranged distributingly are grouped so that their zones are not overlapped with each other and each radio channel corresponding to each group number is set. When a channel is connected from a master controller 10 to a mobile radio station, the radio station is called through a radio channel corresponding to a group number in the unit of groups, and when a mobile radio station makes a request of channel connection to the master controller 10, the mobile radio station makes polling to all stationary stations while designating a radio channel. In both cases, when no reply comes or a communication time expires, call is made sequentially in the unit of groups.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、400MHz帯の特定
小電力無線電話システムの回線接続方法に関し、特に、
主制御装置と複数の固定無線局と複数の移動無線局とか
らなる構内無線システムにおいて、主制御装置と任意の
移動無線局とがデータ伝送を行なう場合の回線接続方法
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line connection method for a 400 MHz band specific low power radio telephone system, and more particularly,
The present invention relates to a line connection method when a main control device and an arbitrary mobile radio station perform data transmission in a local radio system including a main control device, a plurality of fixed radio stations, and a plurality of mobile radio stations.

【0002】[0002]

【従来の技術】主制御装置が、主制御装置に有線で接続
され分散配置された固定無線局を介して任意の移動無線
局に対してデータ伝送を行なう場合、まず、固定無線局
と移動無線局との間の無線区間の回線を確立する必要が
ある。固定無線局が複数台分散配置されている場合、主
制御装置はどの固定無線局から移動無線局と回線接続処
理を行なわせるか指定しなければならない。しかし、移
動無線局の位置によっては、指定した固定無線局と移動
無線局間の距離やノイズ等のため必ずしも回線接続処理
が成功するとは限らず、回線接続処理が失敗した場合
は、主制御装置は他の固定無線局を指定して同様の処理
を繰り返す必要がある。図9は従来の回線接続方法を説
明するシステム構成例図である。このシステムの例は、
主制御装置10に有線で接続され、それぞれゾーン1〜
4を形成する固定無線局1〜4が分散配置されている。
このようなシステムにおける従来の無線回線接続方法で
は、主制御装置10は、適当な1台の、例えば固定無線
局1を選んで移動無線局に対して発呼を行い、応答がな
く失敗であれば、次の固定無線局2からは発呼を行い、
順次発呼を行って固定無線局4からの発呼で応答が得ら
れ回線接続処理を行う。すなわち、固定無線局の順次探
索接続制御を行なっている。一方、移動無線局から主制
御装置10にデータ伝送を行なう場合も同様な接続方法
が行なわれている。すなわち、移動無線局は、複数の固
定無線局のうち適当な1台の固定無線局1に対して指定
された無線チャネルによって発呼を行い、失敗したなら
ば、次の固定無線局2へ切り替えて発呼を行い、主制御
装置10からの応答があるまで順次発呼を繰り返してい
る。
2. Description of the Related Art When a main control device transmits data to an arbitrary mobile radio station via fixed radio stations which are connected by wire to the main control device and are distributed, first, the fixed radio station and the mobile radio station are first transmitted. It is necessary to establish a wireless link with the station. When a plurality of fixed wireless stations are distributed and arranged, the main controller must specify from which fixed wireless station the mobile wireless station is to be connected. However, depending on the position of the mobile radio station, the line connection process does not always succeed due to the distance between the specified fixed radio station and the mobile radio station, noise, etc. If the line connection process fails, the main control unit Needs to specify another fixed wireless station and repeat the same processing. FIG. 9 is an example of a system configuration for explaining a conventional line connection method. An example of this system is
It is connected to the main controller 10 by wire, and each zone 1
The fixed wireless stations 1 to 4 forming 4 are distributed.
In the conventional wireless line connection method in such a system, the main controller 10 selects an appropriate one, for example, the fixed wireless station 1 to make a call to the mobile wireless station, and if there is no response and there is a failure. For example, make a call from the next fixed wireless station 2,
Calls are sequentially made and a response is obtained by the call from the fixed wireless station 4, and the line connection processing is performed. That is, the sequential search connection control of the fixed wireless stations is performed. On the other hand, the same connection method is used when data is transmitted from the mobile radio station to main controller 10. That is, the mobile radio station makes a call to a suitable one fixed radio station 1 among a plurality of fixed radio stations by a designated radio channel, and if it fails, switches to the next fixed radio station 2. Then, the call is sequentially made until the main controller 10 responds.

【0003】[0003]

【発明が解決しようとする課題】しかし、上記従来方法
では、回線が確立するまでの回線接続処理に時間がかか
るという問題がある。さらに、システムが大規模になっ
た場合、移動無線局と回線接続可能な固定無線局が少な
くなるため、指定した固定無線局が移動無線局と回線接
続できる確率が低くなるという問題が生ずる。例えば、
図9のシステムでは、主制御装置10あるいは移動無線
局が、固定無線局1から順に回線接続処理を指定して発
呼する場合、データ伝送路が確立するまでに4回の回線
接続処理を行なわなければならず、時間がかかって効率
が悪いという問題がある。
However, in the above-mentioned conventional method, there is a problem in that it takes time for the line connection processing until the line is established. Further, when the system becomes large-scale, the number of fixed wireless stations that can be connected to the mobile wireless station by line becomes small, so that there is a problem that the probability that the designated fixed wireless station can be connected to the mobile wireless station by line becomes low. For example,
In the system of FIG. 9, when the main controller 10 or the mobile radio station designates the line connection processing in order from the fixed radio station 1 to make a call, the line connection processing is performed four times before the data transmission path is established. There is a problem that it has to be done and it takes time and is inefficient.

【0004】本発明の目的は、上記従来技術の問題点を
軽減するために行なったものであり、主制御装置と移動
無線局間のデータ伝送路が確立するまでの処理時間を短
縮した無線回線接続方法を提供することにある。
An object of the present invention is to reduce the above-mentioned problems of the prior art, and to reduce the processing time until the data transmission path between the main control unit and the mobile radio station is established. It is to provide a connection method.

【0005】[0005]

【課題を解決するための手段】本発明の無線回線接続方
法は、主制御装置と、該主制御装置と有線で接続されそ
れぞれのゾーンを結合させて全体のサービスエリアを構
築するように分散配置された複数の固定無線局と、該サ
ービスエリア内を移動する移動無線局とからなる小電力
無線電話システムにおいて、前記複数の固定無線局をゾ
ーンが互いに重ならないようにグループ分けして該グル
ープ番号に対応する無線チャネルを設定し、前記主制御
装置から前記移動無線局に対する発呼によって回線を接
続するときは、同一グループの固定無線局から同時に相
手移動無線局に発呼信号を送出し、相手移動無線局から
応答があるまでグループ単位に順次探索を続け、前記移
動無線局から前記主制御装置に対する発呼によって回線
を接続するときは、前記グループに番号に対応する無線
チャネルによって同一グループの全固定無線局に対して
発呼信号を送出し、接続可能の固定無線局から応答があ
るまでグループ単位に設定された無線チャネルを用いて
順次探索を続けるようにしたことを特徴とするものであ
る。
SUMMARY OF THE INVENTION A wireless line connection method according to the present invention comprises a main control unit and a distributed arrangement so as to construct a whole service area by connecting the main control unit by wire and connecting respective zones. In a low-power wireless telephone system comprising a plurality of fixed wireless stations and a mobile wireless station that moves within the service area, the plurality of fixed wireless stations are grouped so that zones do not overlap each other, and the group number When a line is connected by calling from the main control device to the mobile radio station, a fixed call from the fixed radio station of the same group to the mobile radio station at the same time When the mobile radio station continues to search in groups until a response is received, and the line is connected by calling from the mobile radio station to the main control unit, A call signal is sent to all the fixed wireless stations of the same group by the wireless channel corresponding to the number in the group, and the wireless channels set for each group are sequentially used until a response is received from the connectable fixed wireless stations. The feature is that the search is continued.

【0006】[0006]

【実施例】図1は本発明の実施例を説明するシステム構
成図である。ゾーン1の固定無線局1とゾーン3の固定
無線局3をグループ1とし無線チャネル1を用い、固定
無線局2と3をグループ2とし無線チャネル2を用いる
ように取り決める。主制御装置10から移動無線局に対
してデータ伝送路を確立する場合は、いくつかの複数固
定無線局から同時に、移動無線局との回線接続処理を行
なわせる。しかし、複数の固定無線局が無差別に回線接
続処理を行なうと電波干渉を起こすおそれがあるため、
同時に回線接続処理を行なう固定無線局を互いに電波干
渉しない位置にあるもの、すなわちゾーンが重なり合わ
ない固定無線局でグループを構成する。主制御装置10
は、このような条件のもとに固定無線局のグループ化を
行なって管理し、同一グループの固定無線局群、例え
ば、グループ1の固定無線局1と3に対して同時に回線
接続処理を行なわせ,そのグループが回線接続処理を失
敗したとき次のグループ2の固定無線局2と4に対して
回線接続処理を行なう。同一グループの固定無線局は、
同一周波数の無線チャネルを使用するように設定されて
いるので、移動無線局と回線が接続された場合は、必ず
その設定された無線チャネルでデータ伝送を行なう。
FIG. 1 is a system configuration diagram for explaining an embodiment of the present invention. It is arranged that the fixed wireless station 1 in the zone 1 and the fixed wireless station 3 in the zone 3 are used as the group 1 and the wireless channel 1 is used, and the fixed wireless stations 2 and 3 are used as the group 2 and the wireless channel 2 is used. When a data transmission path is established from the main control device 10 to a mobile radio station, a plurality of fixed radio stations simultaneously perform line connection processing with the mobile radio station. However, if multiple fixed wireless stations indiscriminately perform line connection processing, radio wave interference may occur,
At the same time, fixed wireless stations that perform line connection processing are located at positions that do not interfere with each other, that is, fixed wireless stations that do not overlap zones form a group. Main controller 10
Manages the fixed wireless stations by grouping them under such conditions, and simultaneously performs the line connection processing for the fixed wireless station group of the same group, for example, the fixed wireless stations 1 and 3 of the group 1. When the group fails the line connection process, the line connection process is performed on the fixed wireless stations 2 and 4 of the next group 2. Fixed wireless stations in the same group
Since the wireless channels of the same frequency are set to be used, when the line is connected to the mobile wireless station, data transmission is always performed on the set wireless channel.

【0007】一方、移動無線局から主制御装置10に対
してデータ伝送路を確立する場合は、移動無線局は1つ
のグループの使用無線チャネルをによって全ての固定無
線局1〜4宛に無線呼び出し(グローバル発呼)を行な
う。移動無線局からの無線呼び出し信号を受信した固定
無線局1〜4は、その指定された無線チャネルが自局が
属するグループの無線チャネルであれば、移動無線局に
対して応答を返し回線接続処理を行なう。自局のグルー
プの無線チャネルでないときは、無線呼び出し信号を無
視して応答せず、回線接続処理は行なわない。図2はそ
の場合の例を示し、移動無線局が無線チャネル3を指定
してグローバル発呼すると、グループ3の固定無線局3
のみが応答を返し、他のグループの固定無線局1,2は
移動無線局からの発呼を無視する。
On the other hand, when establishing a data transmission path from the mobile radio station to the main control unit 10, the mobile radio station wirelessly calls the fixed radio stations 1 to 4 by using the radio channels used by one group. (Global call). The fixed wireless stations 1 to 4 that have received the wireless call signal from the mobile wireless station return a response to the mobile wireless station if the designated wireless channel is the wireless channel of the group to which the local wireless station belongs, and the line connection processing is performed. Do. If it is not the wireless channel of the local station, the wireless ringing signal is ignored and no response is made, and line connection processing is not performed. FIG. 2 shows an example in that case. When the mobile radio station designates the radio channel 3 and makes a global call, the fixed radio stations 3 of the group 3
Only the fixed radio stations 1 and 2 in the other group ignore the call from the mobile radio station.

【0008】前述の図1において、主制御装置10から
移動無線局に対する回線接続の場合、グループ単位に発
呼することにより、移動無線局1は固定無線局4のゾー
ン4内にあるので2回目の発呼による回線接続処理でデ
ータ伝送路を確立することができる。また、移動無線局
から主制御装置10に対するデータ伝送路を確立する場
合、移動無線局は無線チャネル1を指定してグローバル
発呼を行なう。それが失敗したならば、次に無線チャネ
ル2を指定してグローバル発呼を行なう。この場合も、
2回目の発呼による回線接続処理でデータ伝送路が確立
することができる。
In the above-mentioned FIG. 1, in the case of the line connection from the main control unit 10 to the mobile radio station, the mobile radio station 1 is in the zone 4 of the fixed radio station 4 by making a call by the group unit. The data transmission path can be established by the line connection processing by the call. When establishing a data transmission path from the mobile radio station to main controller 10, the mobile radio station designates radio channel 1 to make a global call. If that fails, then wireless channel 2 is designated and a global call is made. Also in this case,
The data transmission path can be established by the line connection processing by the second call.

【0009】さらに具体的な制御方法について説明す
る。まず、主制御装置から移動無線局に対して発呼を行
う場合について説明する。図3は本発明における主制御
装置10の記憶部に予め記憶させておくテーブルの例で
ある。(A)は4つの固定無線局を2つのグループに分
けた固定局グループNoテーブルであり、(B)は各移動
無線局が使用できるグループNoを示す移動局使用グルー
プNoテーブルである。主制御装置10は、この2つのテ
ーブルを用い、次の図4に示すフローチャートによって
回線接続処理を行う。まず発呼相手の移動無線局が使用
できるグループNoを移動局グループNoテーブル(B)か
ら読み出す。次に、そのグループに属する固定無線局を
固定局グループNoテーブル(A)から読み出し、そのグ
ループの全固定局を介して発呼信号を送出する。移動局
から応答(ACK)があれば回線接続を行い、応答がな
い(NAK)とき、又はタイムアウトのときは、リトラ
イカウンタをインクリメントすることにより移動局使用
グループNoテーブル(B)により次のグループNoを指定
するリトライ処理を行う。このようにしてグループ単位
に応答があるまで発呼を行う。
A more specific control method will be described. First, a case where a call is made from the main controller to the mobile radio station will be described. FIG. 3 is an example of a table stored in advance in the storage unit of the main control device 10 according to the present invention. (A) is a fixed station group No. table in which four fixed wireless stations are divided into two groups, and (B) is a mobile station use group No. table showing the group numbers that each mobile wireless station can use. The main controller 10 uses these two tables to perform the line connection process according to the flowchart shown in FIG. First, the group number that can be used by the mobile radio station of the calling party is read from the mobile station group number table (B). Next, the fixed wireless stations belonging to the group are read from the fixed station group No. table (A), and the calling signal is transmitted via all the fixed stations of the group. If there is a response (ACK) from the mobile station, line connection is performed, and if there is no response (NAK) or if there is a timeout, the retry counter is incremented to display the next group number from the mobile station use group number table (B). Perform retry processing that specifies. In this way, the call is made until there is a response for each group.

【0010】次に、移動無線局から主制御装置に対して
発呼を行う場合について説明する。図5は各移動局に記
憶させておく移動局使用チャネルNoテーブルである。図
6は各固定局に記憶させておく固定局No定義テーブルで
あり、各固定局の記憶部に、その固定局の所属グループ
NoとそのチャネルNoを設定して記憶させておく。図7は
移動局発呼のときの移動局側の処理フローチャートを示
し、図8は固定局側の処理フローチャートである。移動
局は、図7のフローチャートに従って、まず、図5のテ
ーブルからチャネルNo1を読み出し、キャリアセンス
(そのチャネルNo1が使用中かどうか)を確かめ、使用
中でなければ(YES)そのチャネルNo1によってグロ
ーバル発呼を行う。すなわち、そのチャネルNo1に対応
するグループNo1に属する固定局のいずれかからの応答
を期待する。若し、キャリアセンスでそのチャネルNo1
が使用中のとき(NO)は、チャネルNoテーブルから次
のチャネルNo2を読み出して上記と同様の処理を行う。
グローバル発呼に対して応答があれば所定の接続手続順
に従って回線が接続され、どの固定局からも応答がなく
タイムアウトのときは、チャネルNoテーブルから次のチ
ャネルNo2を読み出して上記同様の処理を行う。
Next, a case where a mobile radio station makes a call to the main control unit will be described. FIG. 5 is a mobile station use channel number table stored in each mobile station. FIG. 6 shows a fixed station No. definition table stored in each fixed station. The fixed station storage group stores the group to which the fixed station belongs.
Set the No. and its channel No. and store them. FIG. 7 shows a processing flowchart on the mobile station side when the mobile station makes a call, and FIG. 8 is a processing flowchart on the fixed station side. The mobile station first reads the channel No. 1 from the table of FIG. 5 according to the flowchart of FIG. 7, confirms the carrier sense (whether the channel No. 1 is in use), and if it is not in use (YES), the channel No. 1 is set to be global. Make a call. That is, a response from any of the fixed stations belonging to the group No. 1 corresponding to the channel No. 1 is expected. If you are a carrier sense, the channel No. 1
When is in use (NO), the next channel No. 2 is read from the channel No. table and the same processing as above is performed.
If there is a response to the global call, the line is connected according to the prescribed connection procedure order, and if there is no response from any fixed station and it times out, the next channel No. 2 is read from the channel No. table and the same processing as above is performed. To do.

【0011】上述のような移動無線局からの発呼に対し
て、各固定局は、図6のテーブルを用い、図8のフロー
チャートに従って接続処理を行う。待ち受け状態の固定
局が移動局から発呼信号を受信したとき、発呼信号の中
の搬送周波数からチャネルNoを検出し、そのチャネルNo
を図6のように設定された自局の指定チャネルNoと照合
し、一致したとき移動局に対して応答を送信するととも
に所定の接続手続順に従って回線を接続する。受信チャ
ネルNoが自局の指定チャネルNoでないときは、それを無
視して待ち受け状態に戻る。
In response to a call from the mobile radio station as described above, each fixed station uses the table of FIG. 6 and performs connection processing according to the flowchart of FIG. When the fixed station in the standby state receives a call signal from the mobile station, it detects the channel number from the carrier frequency in the call signal and
Is compared with the designated channel No. of its own station set as shown in FIG. 6, and when they match, a response is transmitted to the mobile station and the line is connected according to a predetermined connection procedure order. If the receiving channel number is not the channel number specified by the local station, ignore it and return to the standby state.

【0012】[0012]

【発明の効果】以上説明したように、本発明を実施すれ
ば、主制御装置が固定無線局をグループ管理しグループ
単位に発呼動作を行うため、主制御装置と移動無線局間
のデータ伝送路の確立処理時間が従来の1/2以下に短
縮され、その処理時間は大規模なシステムにおいても安
定しており、固定無線局の増加による影響が少ない等、
実用上の効果が大きい。
As described above, according to the present invention, since the main control unit manages the fixed radio stations in groups and performs the calling operation in group units, data transmission between the main control unit and the mobile radio stations is performed. The path establishment processing time has been reduced to less than half that of the conventional method, and the processing time is stable even in a large-scale system, and the effect of the increase in fixed wireless stations is small.
Greatly effective in practice.

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

【図1】本発明の実施例を説明するシステム構成図であ
る。
FIG. 1 is a system configuration diagram illustrating an embodiment of the present invention.

【図2】本発明による移動無線局からの接続処理例図で
ある。
FIG. 2 is a diagram showing an example of a connection process from a mobile radio station according to the present invention.

【図3】本発明に用いる主制御装置側の記憶テーブル例
図である。
FIG. 3 is a diagram showing an example of a storage table on the main controller side used in the present invention.

【図4】本発明の主制御装置から移動局に対する発呼の
ときのフローチャートである。
FIG. 4 is a flowchart when a call is made from the main control device of the present invention to a mobile station.

【図5】本発明の移動局側の記憶テーブル例図である。FIG. 5 is a diagram showing an example of a storage table on the mobile station side of the present invention.

【図6】本発明の固定局側の記憶テーブル例図である。FIG. 6 is a diagram showing an example of a storage table on the fixed station side according to the present invention.

【図7】本発明の移動局からの発呼のときの移動局側フ
ローチャートである。
FIG. 7 is a flowchart of the mobile station side when a call is originated from the mobile station of the present invention.

【図8】本発明の移動局からの発呼のときの固定局側フ
ローチャートである。
FIG. 8 is a flowchart of the fixed station side when a call is originated from the mobile station of the present invention.

【図9】従来の例を説明するシステム構成図である。FIG. 9 is a system configuration diagram illustrating a conventional example.

【符号の説明】[Explanation of symbols]

10 主制御装置 10 Main controller

───────────────────────────────────────────────────── フロントページの続き (72)発明者 三井 裕之 東京都中野区東中野三丁目14番20号 国際 電気株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroyuki Mitsui 3-14-20 Higashi-Nakano, Nakano-ku, Tokyo Kokusai Electric Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 主制御装置と、該主制御装置と有線で接
続されそれぞれのゾーンを結合させて全体のサービスエ
リアを構築するように分散配置された複数の固定無線局
と、該サービスエリア内を移動する移動無線局とからな
る小電力無線電話システムにおいて、前記複数の固定無
線局をゾーンが互いに重ならないようにグループ分けし
て該グループ番号に対応する無線チャネルを設定し、 前記主制御装置から前記移動無線局に対する発呼によっ
て回線を接続するときは、同一グループの固定無線局か
ら同時に相手移動無線局に発呼信号を送出し、相手移動
無線局から応答があるまでグループ単位に順次探索を続
け、 前記移動無線局から前記主制御装置に対する発呼によっ
て回線を接続するときは、前記グループ番号に対応する
無線チャネルによって同一グループの全固定無線局に対
して発呼信号を送出し、接続可能の固定無線局から応答
があるまでグループ単位に設定された無線チャネルを用
いて順次探索を続けるようにしたことを特徴とする無線
回線接続方法。
1. A main control device, a plurality of fixed wireless stations connected to the main control device by wire and distributed so as to construct an entire service area by combining respective zones, and within the service area In a low power radio telephone system consisting of a mobile radio station that moves a plurality of fixed radio stations, the plurality of fixed radio stations are divided into groups so that zones do not overlap each other, and a radio channel corresponding to the group number is set. When connecting a line by calling from the mobile radio station to the mobile radio station, a call signal is simultaneously sent from the fixed radio stations of the same group to the mobile radio station of the other party, and the search is sequentially performed in group units until a response is received from the mobile radio station of the other party. Continuing, when connecting the line by the call from the mobile radio station to the main control unit, to the radio channel corresponding to the group number Therefore, the call signal is sent to all fixed wireless stations in the same group, and the search is continued sequentially using the wireless channels set for each group until there is a response from the connectable fixed wireless stations. Characteristic wireless line connection method.
JP5341200A 1993-12-13 1993-12-13 Radio channel connection method Pending JPH07170558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5341200A JPH07170558A (en) 1993-12-13 1993-12-13 Radio channel connection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5341200A JPH07170558A (en) 1993-12-13 1993-12-13 Radio channel connection method

Publications (1)

Publication Number Publication Date
JPH07170558A true JPH07170558A (en) 1995-07-04

Family

ID=18344149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5341200A Pending JPH07170558A (en) 1993-12-13 1993-12-13 Radio channel connection method

Country Status (1)

Country Link
JP (1) JPH07170558A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003000580A1 (en) * 2001-05-30 2003-01-03 Hitachi, Ltd. Elevator system
CN108778974A (en) * 2016-03-04 2018-11-09 奥的斯电梯公司 Elevator short range communication system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003000580A1 (en) * 2001-05-30 2003-01-03 Hitachi, Ltd. Elevator system
EP1396455A1 (en) * 2001-05-30 2004-03-10 Hitachi, Ltd. Elevator system
CN1312024C (en) * 2001-05-30 2007-04-25 株式会社日立制作所 Elevator system
EP1396455A4 (en) * 2001-05-30 2009-12-23 Hitachi Ltd Elevator system
CN108778974A (en) * 2016-03-04 2018-11-09 奥的斯电梯公司 Elevator short range communication system
US11345567B2 (en) 2016-03-04 2022-05-31 Otis Elevator Company Elevator short-range communication system

Similar Documents

Publication Publication Date Title
JP2548763B2 (en) Mobile communication zone switching method and control switching center
JPH0616603B2 (en) Mobile communication system
JPH0775151A (en) Interface device for connecting base station to private branch switchboard
JPS63222525A (en) Radio channel search system
US4145657A (en) Radio transmission system for two subscribers to have a mutual connection on one of several frequency channels and having time multiplex interlace of preferred channels
JPH07170558A (en) Radio channel connection method
JPS62108626A (en) Incoming call connection control system of radiotelephony equipment
JP2616677B2 (en) Incoming and outgoing call control system for car phone system
JPH1079700A (en) Radio communication system
JPS6152037A (en) Radiotelephony system
JPS62133833A (en) Method for switching base station during talking
JPH04137962A (en) Communication equipment
JPH04287436A (en) Mobile communication system
JPH0418896A (en) Radio zone switching method during communication
JP3132112B2 (en) Incoming call control method
JP3178048B2 (en) Location registration method and incoming call control method
JPH10224287A (en) Communication processing system for mobile object communication
JP2879945B2 (en) Incoming call display method for wireless telephone system
JPH0454028A (en) Radio communication privacy call control system
JPS63217729A (en) Radio line control method for mobile radio
JP2783251B2 (en) MCA radio equipment
JP3052241B2 (en) Call channel assignment method
JPH0267830A (en) Switching system for mobile communication system
JPH05244084A (en) Calling method for cordless telephone
JP2001292472A (en) Base station controller for personal handy phone system and its wireless communication system