JPS6141239A - Call channel switching system - Google Patents

Call channel switching system

Info

Publication number
JPS6141239A
JPS6141239A JP16307084A JP16307084A JPS6141239A JP S6141239 A JPS6141239 A JP S6141239A JP 16307084 A JP16307084 A JP 16307084A JP 16307084 A JP16307084 A JP 16307084A JP S6141239 A JPS6141239 A JP S6141239A
Authority
JP
Japan
Prior art keywords
channel
call
station
zone
common 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.)
Pending
Application number
JP16307084A
Other languages
Japanese (ja)
Inventor
Yoichi Miyazaki
洋一 宮崎
Toru Akiyama
徹 秋山
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP16307084A priority Critical patent/JPS6141239A/en
Publication of JPS6141239A publication Critical patent/JPS6141239A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W99/00—Subject matter not provided for in other groups of this subclass

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To restart a disconnected call by delivering a busy channel switch request from the shift side through a common control channel in case it is impossible to transmit the information on a new call channel through an oil call channel. CONSTITUTION:A call is disconnected owing to the suddent deterioration of level when a mobile machine 4 enters a zone 6 from a zone 5. In such a case, a mobile machine 4' transmits a busy channel switch request signal via a common control channel. This request signal is received by a base station 3 in the zone 6. The information received by the station 3 is transferred to a control station 1, and a channel so far connected is detected at the station 1. At the same time, a call channel toward the station 3 is set and a call channel sent from an existing exchange network is switched to the call channel set toward the station 3. Then the information on a new call channel is transmitted to the machine 4' through a common channel and via the station 3.

Description

【発明の詳細な説明】 （技術分野） 本発明は、移動通信システムにおける通話中のチャンネ
ル切替をよシ安定に作動させる通話チャンネル切替方式
に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a call channel switching method that more stably switches channels during a call in a mobile communication system.

（従来技術およびその問題点） 従来、この種の移動通信システムの通話中チャンネル切
替は、基地局側の指令によシのみ動作する移動体受動型
のものであった。すなわち、基地局は通話中に常時通話
チャンネルのレベルを監視しておシ、このレベルが規定
以下になった場合、周辺の基地局を制御して、その通話
チャンネルのレベルを測定し、規定のレベル以上の基地
局があれば、移動側はその基地局方向へ移動したと見な
してその基地局を通じての新しい通話チャンネルに切替
えるもので、現在通話中のチャンネルを通して基地局側
よシ新しく変わるべき通話チャンネルの情報を移動側に
伝えるようにしている。一方、移動側はこの情報によシ
、通話チャンネルを新しい通話チャンネルに切替えて切
替動作を完了することになる。(Prior Art and its Problems) Conventionally, channel switching during a call in this type of mobile communication system has been of a mobile passive type that operates only according to commands from the base station side. In other words, the base station constantly monitors the level of the communication channel during a call, and if this level falls below the specified level, it controls surrounding base stations, measures the level of the communication channel, and adjusts the level to the specified level. If there is a base station with a higher level, the mobile side assumes that it has moved in the direction of that base station and switches to a new call channel through that base station, and the base station side receives a new call that should be changed through the channel that is currently being called. Channel information is conveyed to the mobile side. On the other hand, the mobile side uses this information to switch the call channel to a new call channel and complete the switching operation.

しかしながら、この様な従来のチャンネル切替方式では
、劣化してきた通話チャンネル自身で変わるべき新しい
通話チャンネルの情報を送るため、無線ゾーン間を移行
する際やトンネルに入ったような場合に急激に通話チャ
ンネルのレベルが劣化すると、通話が切断されるという
欠点があった。However, in this conventional channel switching method, information on a new communication channel to be changed is sent on the degraded communication channel itself, so when moving between wireless zones or entering a tunnel, the communication channel suddenly changes. There was a drawback that if the level deteriorated, the call would be disconnected.

（発明の目的） 本発明の目的は、このような欠点を解決し、移動機側に
おいて通話中のチャンネルがレベル劣化によシ突然切断
した場合でも共通制御チャンネルを用いて新しい通話チ
ャンネルを伝達することによシ、通話を容易に再開する
ことができる様にした通話チャンネル切替方式を提供す
ることにある。(Object of the Invention) An object of the present invention is to solve such drawbacks and to transmit a new communication channel using a common control channel even if the channel in use on the mobile device side is suddenly cut off due to level deterioration. Particularly, it is an object of the present invention to provide a call channel switching system that allows a call to be easily resumed.

（発明の構成） 本発明の構成は、無線回線設定等を行う制御信号を伝送
する共通制御チャンネル忙よってマルチチャンネルアク
セスを行う移動通信システムの通話チャンネル切替方弐
罠おいて、移動局の操作スイッチによって通話中のチャ
ンネル切替を行う時に、この移動局から前記共通制御チ
ャンネルを用いてそのチャンネル切替を要求する信号を
送出し、この移動局からのチャンネル切替要求信号を受
けたとき制御局の機能が切替られて新たに接続すべき通
話チャンネルを決定し前記共通制御チャンネルを用いて
前記移動局に伝送することを特徴とする。(Configuration of the Invention) The configuration of the present invention provides a method for switching call channels in a mobile communication system that performs multi-channel access due to a busy common control channel that transmits control signals for setting up wireless lines, etc. When switching channels during a call, this mobile station sends a signal requesting the channel switching using the common control channel, and when it receives the channel switching request signal from the mobile station, the control station functions. The present invention is characterized in that a communication channel to be switched and newly connected is determined and transmitted to the mobile station using the common control channel.

本発明においては、通話チャンネルが突然切断した場合
、移動局から共通制御チャンネルを使用して通話中チャ
ンネル切替要求信号を送出し、基地（制御）局ではその
チャンネル切替要求信号を受信したとき、それまで通話
していたチャンネルの検出し、新しく接続すべき通話チ
ャンネルを決定してこの情報を共通制御チャンネルによ
シ移動側へ伝達するようにしている。In the present invention, when a communication channel is suddenly disconnected, the mobile station sends a busy channel switching request signal using a common control channel, and when the base (control) station receives the channel switching request signal, The system detects the channel that was used for communication, determines the communication channel to be newly connected, and transmits this information to the mobile side via a common control channel.

通常の自動車電話方式においては、無線回線設定などを
行う制御信号を伝送する専用の共通制御チャンネルを用
いてマルチチャンネルアクセスを行っているθ本発明に
おいては、この共通制御チャンネルを移動局からのチャ
ンネル切替要求に用いたことを特徴とする。In a normal car telephone system, multi-channel access is performed using a dedicated common control channel that transmits control signals for setting up wireless lines, etc.In the present invention, this common control channel is used as a channel from a mobile station. It is characterized by being used for switching requests.

（発明の実施例） 第１図は本発明の実施例の適用される移動通信システム
の構成図である。このシステム性、既存の交換網と接続
される制御局１と、この制御局１に接続される複数の基
地局２，３と、移動機４ａ。(Embodiment of the Invention) FIG. 1 is a configuration diagram of a mobile communication system to which an embodiment of the present invention is applied. This system includes a control station 1 connected to an existing switching network, a plurality of base stations 2 and 3 connected to this control station 1, and a mobile device 4a.

４ｂとから構成される・また、無線ゾーン５，６鉱基地
局２，３の電波の到達範囲を示しておシ、それぞれの基
地局と交信できるエリアとしている。Wireless zones 5 and 6 also indicate the reachable range of radio waves of base stations 2 and 3, and are areas where communication can be made with each base station.

制御局１は、移動機のゾーン決定１通話チャンネルの決
定を行い、また基地局２，３と制御局１との量線共通制
御チャンネルと複数の通話チャンネルで接続されている
。さらに、基地局２，３は、各種チャンネルの無線有線
変換と、各無線チャンネルのレベルを監視する機能を有
する〇第２図は第１図の動作を説明するフローチャート
である。The control station 1 determines the zone determination 1 communication channel of the mobile device, and is connected to the base stations 2 and 3 and the control station 1 through a common control channel and a plurality of communication channels. Furthermore, the base stations 2 and 3 have a function of performing wireless/wireless conversion of various channels and monitoring the level of each wireless channel. FIG. 2 is a flowchart explaining the operation of FIG. 1.

今、移動機４ａが基地局２を通して通話中にゾーン５か
らゾーン６に移動して移動機４ｂとなった場合を想定す
る。仁の移動機（４）がゾーン５を出てゾーン６にはい
った時、急激なレベル劣化によシ通話が切断された場合
（ステップ１１）、移動４ｆｉ！４ｂは通話中チャンネ
ル切替要求信号を共通制御チャンネルを使用して送信す
ると（ステップ１２）、ゾーン６の基地局３に受信され
ることになる（ステップ１５）。この基地局３に受信さ
れた情報は制御局１に転送され、ここで今まで通話して
いたチャンネルを検出する（ステップ１６）とともに基
地局３向けの通話チャンネルを設定しくステップ１７）
、既存交換網からの通話チャンネルを基地局３向けの通
話チャンネルに接続替えし、基地局３経由で移動機４ｂ
に対し、新しい通話チャンネルの情報を共通チャンネル
により伝達する（ステ、グ１８）。この移動機４ｂはこ
の情報を受信すること（ステ、プ１３）によシ新しい通
話チャンネルに無線周波数を変更しくステップ１４）、
通話を再開することができる。Now, assume that the mobile device 4a moves from zone 5 to zone 6 during a call through the base station 2 and becomes the mobile device 4b. When Jin's mobile device (4) leaves zone 5 and enters zone 6, if the call is cut off due to rapid level deterioration (step 11), move 4fi! 4b transmits a busy channel switching request signal using the common control channel (step 12), which is received by the base station 3 in zone 6 (step 15). The information received by the base station 3 is transferred to the control station 1, which detects the channel that has been used for communication (step 16) and sets the communication channel for the base station 3 (step 17).
, the communication channel from the existing exchange network is changed to the communication channel for base station 3, and the mobile device 4b is connected via base station 3.
In response, information on the new communication channel is transmitted through the common channel (Step 18). By receiving this information (step 13), the mobile device 4b changes the radio frequency to a new communication channel (step 14),
You can resume the call.

なお、本実施例のシステムにおいては、移動機から共通
制御チャンネルを用いて通話チャンネル切替要求信号を
送出するための操作スイッチを必要とし、この移動機か
らのチャンネル切替要求信号を基地局が受けたとき、基
地局ではその要求信号に対応して新たに接続すべき最適
チャンネルの決定を行って共通制御チャンネルを用いて
移動機に伝達す志よう機能の切替られるスイッチ回路を
必要とする。Note that the system of this embodiment requires an operation switch for transmitting a call channel switching request signal from the mobile device using a common control channel, and the base station receives the channel switching request signal from the mobile device. In this case, the base station needs a switch circuit that can switch the desired function of determining the optimal channel to newly connect in response to the request signal and transmitting the determined signal to the mobile device using the common control channel.

（発明の効果） 以上説明した様に本発明によれば、複数の無線ゾーンを
持つ移動通信システムにおいて、ゾーン間を移行した際
急激なレベル劣化によシ、旧通話チャンネルにて新しい
通話チャンネルの情報を送出することかできないような
場合、共通制御チャンネルによって移動側から通話中チ
ャンネル切替要求を送出することにより、従来切断され
ていた通話の再開処理を行なうことができる。(Effects of the Invention) As explained above, according to the present invention, in a mobile communication system having a plurality of radio zones, rapid level deterioration occurs when transitioning between zones. In cases where it is impossible to send information, the mobile side sends a call-in-progress channel switching request via the common control channel, thereby making it possible to resume a call that was previously disconnected.

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

第１図は本発明の詳細な説明する移動通信システムのブ
ロック図、第２図社第１図の実施例のフローチャートで
ある。図において、 １・・・・・・制御局、２，３・・・・・・基地局、４
ａ、４ｂ・・・・・・移動機、５，６・・・・・・無線
ゾーン、１１〜１８・・・・・・ステップ、 である。FIG. 1 is a block diagram of a mobile communication system for explaining the present invention in detail, and a flowchart of the embodiment of FIG. 1 shown in FIG. In the figure, 1... control station, 2, 3... base station, 4
a, 4b...mobile device, 5, 6...wireless zone, 11-18...steps.

Claims (1)

【特許請求の範囲】[Claims] 無線回線設定等を行う制御信号を伝送する共通制御チャ
ンネルによってマルチチャンネルアクセスを行う移動通
信システムの通話チャンネル切替方式において、移動局
の操作スイッチによって通話中のチャンネル切替を行う
時に、この移動局から前記共通制御チャンネルを用いて
そのチャンネル切替を要求する信号を送出し、この移動
局からのチャンネル切替要求信号を受けたとき制御局の
機能が切替られて新たに接続すべき通話チャンネルを決
定し前記共通制御チャンネルを用いて前記移動局に伝送
することを特徴とする通話チャンネル切替方式。In a call channel switching method of a mobile communication system that performs multi-channel access using a common control channel that transmits control signals for setting up wireless lines, etc., when switching channels during a call using the operation switch of a mobile station, the mobile station A signal requesting channel switching is sent using the common control channel, and when receiving the channel switching request signal from the mobile station, the function of the control station is switched to determine the new communication channel to be connected to and A communication channel switching method characterized in that transmission is performed to the mobile station using a control channel.
JP16307084A 1984-08-02 1984-08-02 Call channel switching system Pending JPS6141239A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16307084A JPS6141239A (en) 1984-08-02 1984-08-02 Call channel switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16307084A JPS6141239A (en) 1984-08-02 1984-08-02 Call channel switching system

Publications (1)

Publication Number Publication Date
JPS6141239A true JPS6141239A (en) 1986-02-27

Family

ID=15766604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16307084A Pending JPS6141239A (en) 1984-08-02 1984-08-02 Call channel switching system

Country Status (1)

Country Link
JP (1) JPS6141239A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01109930A (en) * 1987-10-23 1989-04-26 Mitsubishi Electric Corp Speech continuation equipment for mobile radio system
EP0325713A2 (en) * 1988-01-29 1989-08-02 Motorola, Inc. Cellular radiotelephone system with dropped call protection
KR100656038B1 (en) 2003-09-04 2006-12-11 삼성전자주식회사 System and method for selecting a serving base station according to drop of mobile subscriber station in a broadband wireless access communication system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01109930A (en) * 1987-10-23 1989-04-26 Mitsubishi Electric Corp Speech continuation equipment for mobile radio system
EP0325713A2 (en) * 1988-01-29 1989-08-02 Motorola, Inc. Cellular radiotelephone system with dropped call protection
JPH01225236A (en) * 1988-01-29 1989-09-08 Motorola Inc Equipment and method for cellular wireless telephone with protective circuit for dropped call
EP0871340A2 (en) * 1988-01-29 1998-10-14 Motorola, Inc. Cellular radiotelephone system with dropped call protection
EP0871340A3 (en) * 1988-01-29 1999-01-07 Motorola, Inc. Cellular radiotelephone system with dropped call protection
KR100656038B1 (en) 2003-09-04 2006-12-11 삼성전자주식회사 System and method for selecting a serving base station according to drop of mobile subscriber station in a broadband wireless access communication system

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