JPH01170232A - Multi-channel access communication system - Google Patents
Multi-channel access communication systemInfo
- Publication number
- JPH01170232A JPH01170232A JP62327243A JP32724387A JPH01170232A JP H01170232 A JPH01170232 A JP H01170232A JP 62327243 A JP62327243 A JP 62327243A JP 32724387 A JP32724387 A JP 32724387A JP H01170232 A JPH01170232 A JP H01170232A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- group
- mobile station
- channel
- control channel
- 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
Links
- 238000004891 communication Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000012806 monitoring device Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明に１ゾーンを越えた通信が可能なマルチチャネ
ルアクセス（以下ＭＣＡという）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 multi-channel access (hereinafter referred to as MCA) communication system that allows communication beyond one zone.
第４図に従来のＭＣＡ通信号式を示すブロック図であり
、図において、１は監視装置、２は直流分岐装置、３は
この・軽視装置１と直流分岐装置ｉｉ２とを接続する専
用線、４は前記監視装置１あるいは直流分岐装置２とこ
の専用線３との間に配置された変復調ｉ置（以下モデム
という）、５に各ゾーン毎に配置され、前記直流分岐装
置２に接続された回線制御装置、６はこの回−制御装置
１５に接続された制御用送受信装置、７１〜７０に同じ
く前記回巌制御装置５に接続された複数の通話用送受信
装置、８ａｔ〜８ａｎｅ８ｂｌ〜８ｂｎ框Ａ群及び８群
の移動局、９Ｈ１つのゾーンについて１チヤネル用意さ
れ、前ａｄ移動局８ａｌ〜８ｂｎと前記制御用送受信−
＆直６の間に設定される制御用チャネル、１０ａｌ〜１
０ａｎｉ１つのゾーンに複数チャネル用意され、前記移
動局８ａｔ〜８ｂｎと前記通話用送受信装置７．〜７ｎ
の間に設定される通話用チャネルであり、１１に前記回
線制御装置５内に設けられて、８ｇ３図に示すように、
当該回硼制御装置５が設油されたゾーンに登録されてい
る、前記移動局８ａｔ〜８ａｎ及び８ ｂｓ 〜８ ｂ
ｎの各群のユーザコードが記録された、抗み取り専用メ
モリ（以下ＲＯＭという）による登録テーブルである。FIG. 4 is a block diagram showing a conventional MCA communication signal system. In the figure, 1 is a monitoring device, 2 is a DC branching device, 3 is a dedicated line connecting this light-saving device 1 and the DC branching device ii2, A modem 4 (hereinafter referred to as a modem) is placed between the monitoring device 1 or the DC branching device 2 and the dedicated line 3; A line control device, 6 a control transmitting/receiving device connected to this line control device 15, 71 to 70 a plurality of communication transmitting and receiving devices also connected to the circuit control device 5, 8at to 8ane8bl to 8bn frame A One channel is prepared for one zone of the mobile stations of group and group 8, 9H, and the control transmission/reception with the previous ad mobile stations 8al to 8bn.
& Control channels set between shift 6, 10al to 1
0ani A plurality of channels are prepared in one zone, and the mobile stations 8at to 8bn and the communication transmitting/receiving device 7. ~7n
This is a communication channel that is set up between
The mobile stations 8at to 8an and 8bs to 8b are registered in the zone where the recycling control device 5 is installed.
This is a registration table in a memory dedicated to removing friction (hereinafter referred to as ROM) in which user codes for each group of n are recorded.
ｖ＜に動作について説明する。今、例えば、Ａ群内の移
動局８ａ、が発呼すると、当該発呼信号に制御用チャネ
ル９を介して制御用送受信装置６にて受信され、回線制
御装置５へ送らｎる。ここで、前記発呼信号には移動局
８ａｌが属しているＡ群のユーザコードが含まれている
。この発呼信号を受信した回線制御装置５に登録テーブ
ル１１を参照し、そのユーザコードより当該移動局８ａ
ｌが自ゾーンに登録されているＡ群の移動局であること
を確認する。確認がとれると、その時点で空いている通
話用チャネル、例えば１０．を選択し、当該通話用チャ
ネル１０１を指定するチャネル指定信号を生成して前記
制御用送受信装置６へ送る。制御用送受信装置６は、こ
のチャネル指定信号を制御用チャネル９にてＡ詳の各移
動局８３１〜８ａｎへ送信する。このチャネル指定信号
を受信したＡ群の各移動局８ａｌ〜８ａｎに、自局の送
受信周波数を指定された通話用チャネル１０ｍの周波数
に合わせる。The operation will be explained below. Now, for example, when the mobile station 8a in group A makes a call, the calling signal is received by the control transmitting/receiving device 6 via the control channel 9 and sent to the line control device 5. Here, the calling signal includes the user code of group A to which the mobile station 8al belongs. The line control device 5 that received this calling signal refers to the registration table 11 and uses the user code to call the mobile station 8a.
Confirm that l is a mobile station of group A registered in the own zone. Once confirmed, the currently available calling channel, for example 10. is selected, and a channel designation signal designating the communication channel 101 is generated and sent to the control transmitting/receiving device 6. The control transmitting/receiving device 6 transmits this channel designation signal to each of the mobile stations 831 to 8an on the control channel 9. Each of the mobile stations 8al to 8an of group A that received this channel designation signal adjusts its own transmission and reception frequency to the frequency of the designated communication channel 10m.
こｎによって、発呼した移動局８ａ１とＡ群の他の移動
局８ａ、〜８ａｎ＆！、指定された通信用チャネル１０
Ｉを用いて、そｎに対応する通話用送受信ｇｃｗＩｔ７
、を介して通話状態に入る。As a result, the calling mobile station 8a1 and the other mobile stations 8a, ~8an&! of group A are connected. , designated communication channel 10
Use I to transmit and receive calls corresponding to n gcwIt7
, enter the call state via .
一万、前記回線制御装置５は直流分岐装置２によって他
の回線料＃装置とまとめらｎ１専用、１１３によってモ
デム４ｔ−介して監視装置１に接続さｎており、この監
視！！ｉｆ１は各回線制御装［５の運用状成金、常時監
視し、１ｆＩＩｌ＃シている。10,000, the line control device 5 is connected to the monitoring device 1 through the modem 4t by 113, which is connected to the monitoring device 1 through the modem 4t, which is connected to the other line charge devices by the DC branching device 2. ! if1 constantly monitors the operational status of each line control unit [5] and monitors it.
従来のＭＣＡ通信号式框以上のように構放されているの
で、移動局８ａｔ〜８ａｎ及び８ｂ１〜８ｂｎによる群
はそれぞれ１つのゾーンの回線制御装置５にしか登録さ
れておらず、従って、移動局８ａｔがゾーンを越えて隣
接ゾーンへ移動した場合、Ａ群の移動局８ａ、〜８ａｎ
のいずれかが当該隣接ゾーン内にいても、その移動局８
ａ、〜８ａｎとの通話を行うことができないという問題
点があった。Since the mobile stations 8at to 8an and 8b1 to 8bn are each registered in the line control device 5 of one zone, the mobile stations are When the station 8at moves beyond the zone to an adjacent zone, the mobile stations 8a, ~8an of group A
Even if one of the mobile stations is within the adjacent zone, the mobile station 8
There was a problem in that it was not possible to make a call with a, ~8an.
この発明に上記のような問題点を解消するためになされ
た４ｏで、移動局がゾーンを越えて広範囲に移動しなが
らそのゾーン内の自群の移動局と通話することのできる
ＭＣＡＣ慣通式を得ることを目的とする。In order to solve the above-mentioned problems in this invention, 4o is a conventional MCAC method that allows a mobile station to communicate with its own group of mobile stations within the zone while moving over a wide range of zones. The purpose is to obtain.
ｃ問題点を解決するための手段〕
この発明に係るＭＣＡ通信方式に、複数の移動局よりな
る群を複数のゾーンに登録しておき、その群内の各移動
局にサーチテーブルを設ケ、ソのサーチテーブルに、そ
の群が登録した各ゾーンのゾーンコード、ユーザコード
、制御用チャネルを記録して、移動局がゾーンを越えて
移動した場合、当該移動局に前記サーチテーブルを用い
て移動先ゾーンの制御用チャネルをダして発呼し、その
制御用チャネルにて通話用チャネルが指定されるもので
ある。Means for Solving Problem c] In the MCA communication system according to the present invention, a group consisting of a plurality of mobile stations is registered in a plurality of zones, and a search table is provided for each mobile station in the group, The zone code, user code, and control channel for each zone registered by the group are recorded in the search table of the mobile station, and when a mobile station moves beyond the zone, the mobile station can be moved using the search table. A call is made using the control channel of the destination zone, and the call channel is designated by the control channel.
この発明におけるＭＣＡｍ信方式に、そｎが属している
群が複数のゾーンに登録されている移動局が、あるゾー
ンよりゾーンを越えて他のゾーンへ移動した場合、その
移動局な、自局の属する群が登録されているゾーンのゾ
ーンコード、ユーザコード、制御用チャネル等が記録さ
れているサーチテーブルｔサーチして、移動先のゾーン
の制御用チャネルを捜して発呼し、その制御用チャネル
にて指定された通話用チャネルを用いて、そのゾーン内
の自群の移動局と１出偏する。In the MCA communication system of this invention, when a mobile station whose group to which it belongs is registered in multiple zones moves from one zone to another zone, the mobile station Search the search table in which the zone code, user code, control channel, etc. of the zone to which the group belongs is registered, search for the control channel of the destination zone, make a call, and call the control channel. Using the communication channel specified by the channel, the mobile station makes one call with the mobile station of its own group within the zone.
以下、この発明の一実施例を図について説明する。第１
図において、５框回線制御装置、６に制両用送受信装置
、７１〜７ｎに通話用送受信装置、９は制御用チャネル
、１０．〜１０ｎは通話用チャネル、１１に登録テーブ
ルであり、第４図に同一符号を付した従来のそれらと同
一、あるいは相当部分であるため詳細な説明は省略する
。ｆた、１２ｓ 、１２＊ −１２ｍ−・・・はそれぞ
れ制御用送受信装置ｉｔ６及び通話用送受信装置７．〜
７ｎのサービスエリアによって規定されるゾーン、１３
ａ１〜１３ａｎ＊１３ｂｔ〜１３ｂｎ ＃ １５ｃｌ〜
１５ｃｎ １４それぞれＡ群、８群もしくｔａＣ群に属
する、従来の移動局８ａｔ〜８ｂｎに相当する移動局で
あり、１４はこの移動局１５ａ、〜１５ｃｎのそれぞれ
に設けられて、第２図に示すように、当該移動局１３ａ
ｌ〜１５ ｃｎが属している詳が登録されているゾーン
のそれぞれについて、そのゾーン名、ゾーンコード、ユ
ーザコード、制御用チャネル等が記録されたＲＯＭによ
るサーチテーブルである０また、第１図においては、監
視値ｗｔ１から＠浦分配装置２までの系は図示を省略し
ている。An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 5 is a frame line control device, 6 is a control transmitting and receiving device, 71 to 7n are communication transmitting and receiving devices, 9 is a control channel, 10. 10n is a communication channel, and 11 is a registration table, which are the same as or correspond to those in the conventional system denoted by the same reference numerals in FIG. 4, and detailed explanations thereof will be omitted. f, 12s, 12*-12m-... are the control transmitting/receiving device it6 and the calling transmitting/receiving device 7. ~
Zone defined by the service area of 7n, 13
a1~13an*13bt~13bn #15cl~
15cn 14 is a mobile station corresponding to the conventional mobile stations 8at to 8bn, which belong to group A, group 8, or group taC, and 14 is provided in each of these mobile stations 15a and 15cn, and is shown in FIG. As shown, the mobile station 13a
l~15 This is a search table in ROM in which the zone name, zone code, user code, control channel, etc. are recorded for each zone whose details are registered to which cn belongs. The system from the monitoring value wt1 to the @Ura distribution device 2 is not shown.
次に動作について説明する０今、移動局１３ａ１〜１３
ａｎよシなるＡ群は、第１ゾーン１２１．第２ゾーン１
２ｍ−第３ゾーン１２１．・・・に登録されているもの
とする。ここで、稟１シー７１２１内を走行中のＡ群の
移動局１３ａ、が発呼すると、発呼信号がＷＩＪ１ゾー
ン１２．の制御用チャネル９を介して制御用送受信装置
６エク、（ロ）線制御装［５に送られ、回線制御装置５
は内蔵する登録テーブル１１を参照して、当該移動局１
６ａ、が第１ゾーン１２＋に登録されているＡ群の移動
局であることの確認を行う。確認後、その時点で空いて
いる通話用チャネル、例えば１０ｓ ｔｌ−選択して、
それを指定するチャネル指定信号を制御用送受信装置！
ｔ６エり制御用チャネル９を弁して、Ａ群の各移動局１
５ａ、〜１５ａｎ中で当該第１ゾーン１２．を走行中の
ものへ送信する。このチャネル指定信号を受信したＡ群
の各移動局は、自局の送受信周波数を指定された通話用
チャネル１０．の周波数に合わせ、この通話用チャネル
１０ｍを介して、移動局１３ａ、と第１ゾーン１２、内
を走行中のＡ群の池の移動局との間の通信が開始さｎる
。Next, the operation will be explained.0 Now, the mobile stations 13a1 to 13
Group A is located in the first zone 121. 2nd zone 1
2m - 3rd zone 121. It is assumed that it is registered in... Here, when the mobile station 13a of group A, which is traveling within the WIJ1 zone 7121, makes a call, the calling signal is transmitted to the WIJ1 zone 12. is sent to the control transmitting/receiving device 6, (b) line control device [5] via the control channel 9, and the line control device 5
refers to the built-in registration table 11 and selects the mobile station 1.
6a is a mobile station of group A registered in the first zone 12+. After confirmation, select an available call channel at that time, e.g. 10s tl.
A transmitter/receiver for controlling the channel designation signal that specifies it!
t6Each mobile station 1 of group A by valve control channel 9.
5a to 15an in the first zone 12. to the moving object. Each mobile station in group A that receives this channel designation signal changes its own transmission and reception frequency to the designated call channel 10. Communication is started between the mobile station 13a and the mobile station in the pond of group A, which is traveling in the first zone 12, through this communication channel 10m.
通常、各移動局１！ｉａ、〜１５ｃｎに受信している制
御用チャネル９の電界ｔ−監視しており、例えば、移動
局１３ａ、が第１ゾーン１２、より第２ゾーン１２、ヘ
ゾーンを越えて移動する場合、第１シー７１２、と第２
ゾーン１２！の境界付近で第１シー７１２、の制御用チ
ャネル９の電界が悪くなるため、移動局１３ａ１は内蔵
するサーチテーブル１４に登録されている制御用チャネ
ルの周波数を順番にサーチし、７ａＪ２ゾーン１２．の
制御用チャネル９ｔ−捜しにしめる。サーチの過程で電
界が良好となった周波数が求める第２ゾーン１２．の制
御用チャネル９であり、ここでサーチを終了する。この
第２ゾーン１２．における移動局１６ａ、の発呼も、前
記第１ゾーン１２．での発呼と全く同様であり、この第
２シー７１２．の制御用チャネル９ｔ−用いて発呼信号
を送出し、登録テーブル１１による登録確認の恢に前記
制御用チャネル９によって、回線制御装置５より指定さ
れる通話用チャネル、例えば１０１を用いて、第２ゾー
ン１２！内を走行中のＡ群の移動局１３ａ８等との通信
を開始する。Usually 1 for each mobile station! For example, when the mobile station 13a moves from the first zone 12 to the second zone 12 and beyond, the electric field t of the control channel 9 received at Sea 712, and the second
Zone 12! Since the electric field of the control channel 9 of the first sea 712 deteriorates near the boundary of the first sea 712, the mobile station 13a1 sequentially searches the frequencies of the control channels registered in the built-in search table 14, and searches for the control channel frequencies registered in the built-in search table 14 in order. control channel 9t-. The second zone 12 is determined by the frequency at which the electric field becomes good during the search process. control channel 9, and the search ends here. This second zone 12. The mobile station 16a in the first zone 12. also makes a call. This is exactly the same as making a call at 712. A calling signal is sent using the control channel 9t of the control channel 9t-, and after registration confirmation by the registration table 11, the control channel 9 sends a call signal using the call channel specified by the line control device 5, for example 101. 2 zones 12! communication with mobile stations 13a8, etc. of group A that are traveling within the area.
以下、第３ゾーン１２．への移動、さらにはこのｍ３ゾ
ーン１２！を越えての移動の場合についても、前述の場
合と全く同様であり、当該群が登録されている範囲であ
れば、ゾーンを越えた広範囲な領域でのＭＣＡ通信が可
能となる。Below, the third zone 12. Moving to, and even this m3 zone 12! The case of movement beyond the zone is exactly the same as the above case, and as long as the group is registered, MCA communication is possible in a wide area beyond the zone.
以上のように、この発明によれば、それが属する許が一
複数のゾーンに登録された移動局が、あるゾーンを越え
て移動する場合、サーチテーブルのサーチによって、移
動先のゾーンの制御用チャネルを捜して発呼し、その′
制御用チャネルにて指定さｎた通話用チャネルを用いて
ＭＣＡ通信を行うように構成したので、移動局がゾーン
を越えて広範囲に移動しながら、該当ゾーン内の自群の
移動局と通話することが可能なＭＣＡ通信方式が得られ
る効果がある。As described above, according to the present invention, when a mobile station to which it belongs is registered in one or more zones moves beyond a certain zone, by searching the search table, the mobile station is registered in one or more zones. Find a channel, make a call, and
Since the configuration is configured to perform MCA communication using the communication channel specified by the control channel, the mobile station can talk to its own group of mobile stations within the corresponding zone while moving over a wide area beyond the zone. This has the effect of providing an MCA communication system that allows for
第１図ａこの発明の一実施例によるＭＣＡ通信方式を示
すブロック図、第２図にその移動局内に設けられたサー
チテーブルを示す説明図、第３図は回線制御装置内に設
けられた登録テーブルを示す説明図、第４図は従来のＭ
ＣＡ通信方式を示すブロック図である０
５に回線制御装置、９に制御用チャネル、１０゜〜ＩＱ
ｎは通話用チャネル、１２１＋１２ｔ１１２ｓ＃・・・
にゾーン（第１ゾーン、第２ゾーン、第３ゾーン、・・
・）、１５ａ、〜１３ａｎに移動局、１４にサーチテー
ブル０
なお、図中、同一符号に同一、又に相当部分を示す。
特許出願人 三菱電機株式会社
（外２名）Fig. 1a is a block diagram showing an MCA communication system according to an embodiment of the present invention, Fig. 2 is an explanatory diagram showing a search table provided in the mobile station, and Fig. 3 is a registration diagram provided in the line control device. An explanatory diagram showing the table, Figure 4 is the conventional M
This is a block diagram showing the CA communication system.05 is a line control device, 9 is a control channel, 10°~IQ
n is the call channel, 121+12t112s#...
Zones (1st zone, 2nd zone, 3rd zone, etc.)
), 15a to 13an are mobile stations, and 14 is a search table 0. In the figure, the same reference numerals indicate the same or corresponding parts. Patent applicant: Mitsubishi Electric Corporation (2 others)
Claims (1)
コードを有して複数の移動局によりなる群の、前記移動
局の１つより発呼があると、前記回線制御装置はその時
点で空いている通話用チャネルを探し出し、当該通話用
チャネルの指定を制御用チャネルを用いて行い、前記発
呼した移動局が属する群の各移動局がそれぞれ、前記指
定された通話チャネルの周波数に送受信の周波数を合わ
せることにより、前記群内の移動局間の通信を行うマル
チチャネルアクセス通信装置において、前記群を複数の
前記ゾーンに登録するとともに、前記群内の各移動局に
、当該群が登録された各ゾーンのゾーンコード、ユーザ
コード、制御用チャネルを記録したサーチテーブルを持
たせ、前記移動局がゾーンを越えて移動した場合、その
移動局は前記サーチテーブルをサーチして移動先のゾー
ンの前記制御用チャネルを捜して発呼し、その制御用チ
ャネルによつて指定される前記通話用チャネルを用いて
、当該ゾーン内の自群の移動局との通信を行うことを特
徴とするマルチチャネルアクセス通信方式。A line control device is provided for each zone, and when a call is made from one of the mobile stations in a group consisting of a plurality of mobile stations, each having an individual user code, the line control device at that point A vacant communication channel is searched, the communication channel is designated using a control channel, and each mobile station in the group to which the calling mobile station belongs transmits and receives data on the frequency of the specified communication channel. In a multi-channel access communication device that performs communication between mobile stations within the group by matching the frequencies of the groups, the group is registered in the plurality of zones, and the group is registered in each mobile station within the group. The mobile station has a search table that records the zone code, user code, and control channel of each zone, and when the mobile station moves beyond the zone, the mobile station searches the search table to find the zone to which it has moved. The mobile station searches for the control channel of the zone and makes a call, and uses the communication channel specified by the control channel to communicate with the mobile stations of the own group within the zone. Channel access communication method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62327243A JPH01170232A (en) | 1987-12-25 | 1987-12-25 | Multi-channel access communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62327243A JPH01170232A (en) | 1987-12-25 | 1987-12-25 | Multi-channel access communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01170232A true JPH01170232A (en) | 1989-07-05 |
Family
ID=18196927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62327243A Pending JPH01170232A (en) | 1987-12-25 | 1987-12-25 | Multi-channel access communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01170232A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5408684A (en) * | 1992-09-21 | 1995-04-18 | Ntt Mobile Communications Network, Inc. | Control channel selecting method for mobile stations |
| JPH08294170A (en) * | 1995-04-21 | 1996-11-05 | Nec Corp | Mobile communication system |
| US6212363B1 (en) * | 1989-11-29 | 2001-04-03 | Motorola, Inc. | Method and apparatus for signalling interference protection in a channel reuse radio network |
-
1987
- 1987-12-25 JP JP62327243A patent/JPH01170232A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6212363B1 (en) * | 1989-11-29 | 2001-04-03 | Motorola, Inc. | Method and apparatus for signalling interference protection in a channel reuse radio network |
| US5408684A (en) * | 1992-09-21 | 1995-04-18 | Ntt Mobile Communications Network, Inc. | Control channel selecting method for mobile stations |
| JPH08294170A (en) * | 1995-04-21 | 1996-11-05 | Nec Corp | Mobile communication system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR910006320B1 (en) | Communication control system for retrieving set of calling telephones in vehicular wireless telephone network | |
| RU2154344C2 (en) | Synchronization of connections while communicating in mobile communication systems | |
| US5699409A (en) | Cordless telephone system for providing set-up communications between subsidiary units through a master unit | |
| SE450863B (en) | CELL DIVIDED MOBILE RADIO TELEPHONE COMMUNICATION SYSTEM WITH DIRECTING SERVICE | |
| EP0682847A1 (en) | Method for controlling a subscriber station in a radio system | |
| JPH01170232A (en) | Multi-channel access communication system | |
| JPH0884373A (en) | Mobile communication network and communication system for it | |
| JP2872154B2 (en) | Simplex communication control method for digital mobile communication system | |
| JPH05268155A (en) | TDMA wireless communication control system | |
| JPH01170231A (en) | Multi-channel access communication system | |
| JPH02193425A (en) | Mobile communication system | |
| JPH066637Y2 (en) | Wireless communication device | |
| JPH10341473A (en) | Group communication system | |
| JPS63200629A (en) | Composite mobile communication system | |
| JPS62101136A (en) | Method of registering position of mobile station | |
| JPH0331290B2 (en) | ||
| JPS63202144A (en) | Automobile telephone system | |
| JPH02119326A (en) | Multi-zone mobile communication system | |
| JPH02119327A (en) | Multi-zone mobile communication system | |
| JPH01154637A (en) | Setting system for speech monitor function | |
| JP2928229B1 (en) | Digital mobile communication system | |
| JP2003102065A (en) | Wireless terminal station communication switching method | |
| JPH1051374A (en) | Wireless relay device and its wireless channel relay method | |
| JP2524115B2 (en) | Wireless communication method | |
| JP2767641B2 (en) | Multi-frequency simultaneous wireless communication device |