JP2004015425A - Mobile station, ground switch, wireless system, and selection control method for wireless apparatus - Google Patents

Mobile station, ground switch, wireless system, and selection control method for wireless apparatus Download PDF

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JP2004015425A
JP2004015425A JP2002166093A JP2002166093A JP2004015425A JP 2004015425 A JP2004015425 A JP 2004015425A JP 2002166093 A JP2002166093 A JP 2002166093A JP 2002166093 A JP2002166093 A JP 2002166093A JP 2004015425 A JP2004015425 A JP 2004015425A
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radio
mobile station
call
exchange
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JP3904980B2 (en
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Yoichiro Hayashi
林　洋一郎
Hiroshi Shobu
正部　裕志
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a ground exchange capable of a normal wireless apparatus at all times and warranting a speech between a mobile station and the ground switch. <P>SOLUTION: A wireless apparatus state supervisory section 21 of the mobile station 31 periodically supervises a fault state of speech wireless apparatuses 11, 12, stores the result to a wireless apparatus state storage section 22, a call control section 23 reads the information in the wireless apparatus state storage section 22 and sets the information to a signal transmitted to the ground switch 51, and the ground exchange 51 utilizes the information to select the speech wireless apparatus that is not in out of order at all times. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、多重化構成を採用した移動局、地上交換機、無線システムおよび無線機の選択制御方法に関するものである。
【０００２】
【従来の技術】
列車における無線システムのように、移動局が複数の無線機で構成される多重化構成の無線システムでは、無線機の故障状態を管理し、正常な機器選択を行うよう制御する必要がある。
図１１，図１２は従来の無線機故障発生時の動作を説明するためのシーケンス図である。図１１は地上交換機５１から発信して移動局３１と通話を行う際のシーケンス図であり、図１２は移動局３１から発信する場合のシーケンス図である。図において移動局３１は周波数の異なる無線機Ａ，Ｂを実装しており、無線機Ａは故障しているものとする。
【０００３】
図１１において地上交換機５１から発信して移動局３１と通話を行う場合、地上交換機５１は、移動局３１に送信する呼設定信号にて、無線機Ａ，Ｂいずれを使用するか移動局に通知する。通常、地上交換機５１は、通話を行う無線機を選択する際に移動局の進行方向を基に決定する。この時、地上交換機５１には無線機Ａが故障していることが分からないため、無線機Ａが選択されることがある。その場合には、移動局３１と地上交換局５１間の通話は無音通話になってしまう。
【０００４】
また、図１２において移動局３１から発信して地上交換機５１と通話を行う場合、地上交換機５１は、移動局３１から受信した呼設定信号に対して送信する呼出信号中に、使用する無線機の情報を設定して移動局３１に通知するが、ここでも同様に、故障している無線機Ａが選択される場合があり、その結果無音通話が発生してしまう。
【０００５】
【発明が解決しようとする課題】
従来の無線システムは以上のように構成されているので、地上交換機による無線機の選択方式は、無線機の故障状態に拠らず移動局の進行方向により決定されるというものであり、選択した無線機が故障していた場合は、シーケンス上通話状態に至るが音声が通らない（無音となる）という課題があった。
【０００６】
また、移動局の無線機の故障状態を地上交換機により常時監視するとすれば、地上交換機にかかる負荷および通信回線のトラフィックの増大につながるという問題がある。
【０００７】
この発明は上記のような課題を解決するためになされたもので、地上交換機が移動局の無線機の状態を常時監視することなく、接続時に故障していない無線機を選択することにより、無音通話状態が発生しない移動局、地上交換機、無線システムおよび無線機の選択制御方法を得ることを目的とする。
【０００８】
【課題を解決するための手段】
この発明に係る移動局は、無線機の状態が正常か故障かを定期的に監視する無線機状態監視部と、無線機状態監視部によって監視された無線機の状態を格納する無線機状態格納部と、無線機状態格納部に格納された無線機の状態を、地上交換機との通話に至るシーケンスの信号中に設定して地上交換機に通知する呼制御部とを備えたものである。
【０００９】
この発明に係る地上交換機は、移動局からのシーケンス信号中に設定された無線機の状態が正常か故障かの情報に基づいて、正常な無線機を選択する無線機選択部を備えたものである。
【００１０】
この発明に係る無線システムは、移動局は、無線機の状態が正常か故障かを定期的に監視する無線機状態監視部と、無線機状態監視部によって監視された無線機の状態を格納する無線機状態格納部と、無線機状態格納部に格納された無線機の状態を、地上交換機との通話に至るシーケンスの信号中に設定して地上交換機に通知する呼制御部とを備え、地上交換機は、移動局からのシーケンス信号中に設定された無線機の状態が正常か故障かの情報に基づいて、正常な無線機を選択する無線機選択部を備えたものである。
【００１１】
この発明に係る無線機の選択制御方法は、移動局が、地上交換機との通話に至るシーケンスの信号中に無線機の状態が正常か故障かの情報を設定し、地上交換機が、受け取った無線機の状態についての情報に基づいて、正常な無線機を選択するものである。
【００１２】
【発明の実施の形態】
以下、この発明の実施の一形態を説明する。
実施の形態１．
図１は、この発明の実施の形態１による無線システムの構成を示すブロック図である。図において３１は移動局、１１，１２は通話無線機、１３は呼制御無線機、２１は無線機状態監視部、２２は無線機状態格納部、２３は呼制御部、５１は地上交換機、４１は呼制御部、４２は無線機選択部、６１は基地局である。
【００１３】
移動局３１は通話無線機１１，１２による多重化構成を採用している。移動局３１は、無線機状態監視部２１および無線機状態格納部２２を有している。通話無線機１１，１２は、無線機状態監視部２１によって周期的に故障状態を監視され、監視結果は無線機状態格納部２２に格納される。移動局３１と地上交換機５１との間の通話シーケンスは移動局３１の呼制御部２３および地上交換機５１の呼制御部４１により制御される。地上交換機５１は、通話に際して使用する無線機を選択する無線機選択部４２を有する。
【００１４】
次に動作について説明する。
図２は、移動局３１の無線機状態監視処理のフローチャートである。
ステップＳＴ１は移動局３１の立ち上げ時の処理であり、移動局３１に含まれる通話無線機１１，１２の故障状態に関して、無線機状態格納部２２に初期状態（正常）が設定される。
【００１５】
移動局３１の立ち上げ直後から、無線機状態監視部２１は通話無線機１１，１２の定周期監視を開始する。ステップＳＴ２において、無線機状態監視部２１は通話無線機１１の故障状態を判断し、故障を検出した場合は、ステップＳＴ３にて無線機状態格納部２２に通話無線機１１の故障を記録する。ステップＳＴ２において通話無線機１１が正常な状態であると判断された場合は、ステップＳＴ４で無線機状態格納部２２に通話無線機１１は正常であることが記録される。同様に、ステップＳＴ５において無線機状態監視部２１は通話無線機１２の故障状態を判断し、故障を検出した場合はステップＳＴ６にて無線機状態格納部２２に通話無線機１２の故障を、正常と判断した場合はステップＳＴ７にて正常であることをそれぞれ記録する。ここまでの処理が終了すると、ステップＳＴ８へ進み、予め設定された監視時間になったら再びステップＳＴ２に戻り、定期的な監視処理を行う。
【００１６】
次に移動局３１と地上交換機５１との通話時の処理について説明する。図３は、実施の形態１による、地上交換機５１から発信して移動局３１と通話を行う際のシーケンス図である。
地上交換機５１から発信して移動局３１と通話を行う場合、まず移動局３１に対してページング要求信号を送信する。移動局３１が呼制御無線機１３を介してページング要求信号を受信すると、呼制御部２３により無線機状態格納部２２から通話無線機１１，１２の故障情報が読み出される。読み出された故障情報の内容は、地上交換機５１に送信されるページング応答信号の情報要素として設定される。図４は移動局３１から地上交換機５１に対して送信されるページング応答信号のフォーマットを示す図である。通話無線機１１の故障情報は図中の４０１に格納され、正常であれば「０」が、故障であれば「１」が設定される。同様に、通話無線機１２の故障情報は図中の４０２に設定される。
【００１７】
移動局３１からページング応答信号を受信した地上交換機５１の呼制御部４１は、ページング応答信号から無線機の故障情報を抽出し、無線機選択部４２に通知する。無線機の故障情報を通知された無線機選択部４２は、通話無線機１１，１２の双方が故障していなければ、従来の選択方式通り進行方向によって通話無線機１１，１２のいずれかを選択する。一方、通話無線機１１が故障していれば通話無線機１２を、通話無線機１２が故障していれば通話無線機１１をそれぞれ選択する。
【００１８】
無線機選択部４２はこの選択結果を呼制御部４１に返し、その結果を受けた呼制御部４１は、その内容を移動局３１に送信する呼設定信号の情報要素として設定する。図５は地上交換機５１から移動局３１に対して送信される呼設定信号のフォーマットを示す図である。無線機選択部４２により選択された無線機の情報は図中５０１に格納され、移動局３１に送信される。
【００１９】
次に、移動局３１から発信して地上交換機５１と通話を行う場合の処理について説明する。
図６は、実施の形態１による、移動局３１から発信して地上交換機５１と通話を行う際のシーケンス図である。
移動局３１では、まず呼制御部２３により無線機状態格納部２２から通話無線機１１，１２の故障情報が読み出される。次に読み出された故障情報の内容が、地上交換機５１に送信される呼設定信号の情報要素として設定される。図７は移動局３１から地上交換機５１に対して送信される呼設定信号のフォーマットを示す図である。通話無線機１１の故障情報は図中の７０１に格納され、正常であれば「０」が、故障であれば「１」が設定される。同様に、通話無線機１２の故障情報は図中の７０２に設定される。
【００２０】
移動局３１から呼設定信号を受信した地上交換機５１の呼制御部４１は、呼設定信号から無線機の故障情報を抽出し、無線機選択部４２に通知する。無線機の故障情報を通知された無線機選択部４２は、通話無線機１１，１２の双方が故障していなければ、従来の選択方式通り進行方向によって通話無線機１１，１２のいずれかを選択する。一方、通話無線機１１が故障していれば通話無線機１２を、通話無線機１２が故障していれば通話無線機１１をそれぞれ選択する。
【００２１】
無線機選択部４２はこの選択結果を呼制御部４１に返し、その結果を受けた呼制御部４１は、その内容を移動局３１に送信する呼出信号の情報要素として設定する。図８は地上交換機５１から移動局３１に対して送信される呼出信号のフォーマットを示す図である。無線機選択部４２により選択された無線機の情報は図中８０１に格納され、移動局３１に送信される。
【００２２】
図９は、地上交換機５１から発信して移動局３１と通話を行う際に、無線機故障が発生した場合のシーケンス図である。ここでは、移動局３１の通話無線機１１が故障しているとする。地上交換機５１からページング要求信号を受信した移動局３１は、図４に示したようにページング応答信号に通話無線機１１が故障状態にあることを設定する。ページング応答信号を受信した地上交換機５１は、通話無線機１１の故障を知ることが出来るので、通話無線機１２を選択する。そして、図５に示したように呼設定信号にて通話無線機１２を指定することにより、正常な通話が可能となる。
【００２３】
また、図１０は、移動局３１から発信して地上交換機５１と通話を行う際に、無線機故障が発生した場合のシーケンス図である。ここでは、移動局３１の通話無線機１１が故障しているとする。移動局３１は、図７に示したように呼設定信号に通話無線機１１が故障状態にあることを設定する。呼設定信号を受信した地上交換機５１は、通話無線機１１の故障を知ることが出来るので、通話無線機１２を選択する。そして、図８に示したように呼出信号にて通話無線機１２を指定することにより、正常な通話が可能となる。
【００２４】
以上のように、この実施の形態１によれば、移動局３１と地上交換機５１間の通話において、多重化構成を採用した移動局３１の無線機の故障状態を、通話に至るシーケンスの信号中の情報要素として地上交換機５１に通知し、地上交換機５１は、その情報を利用して常に故障していない通話無線機を選択することにより、地上交換機５１による常時監視を行わずに、無音通話を抑止出来るという効果が得られる。
【００２５】
また、この実施の形態１によれば、無線機の故障状態の監視は、移動局３１の無線機状態監視部２１が定期的に行い、その結果を無線機状態格納部２２に格納し、通話時には、呼制御部２３が無線機状態格納部２２の情報を読み出して地上交換機５１に送信する信号中に設定するようにしたので、移動局自身により効率よく無線機の故障状態を監視出来るという効果が得られる。
【００２６】
【発明の効果】
以上のように、この発明によれば、地上交換機が移動局の無線機を常時監視することによる通信回線のトラフィック増加や地上交換機の処理負担を招くことなく、地上交換機が常に正常な無線機を選択することを可能にし、移動局と地上交換機間の通話を保証するという効果がある。
【図面の簡単な説明】
【図１】この発明の実施の形態１による無線システムの構成を示すブロック図である。
【図２】この発明の実施の形態１による移動局の無線機状態監視処理のフローチャートである。
【図３】この発明の実施の形態１による地上交換機から発信して移動局と通話を行う際のシーケンス図である。
【図４】この発明の実施の形態１による移動局から地上交換機に対して送信されるページング応答信号のフォーマットを示す図である。
【図５】この発明の実施の形態１による地上交換機から移動局に対して送信される呼設定信号のフォーマットを示す図である。
【図６】この発明の実施の形態１による移動局から発信して地上交換機と通話を行う際のシーケンス図である。
【図７】この発明の実施の形態１による移動局から地上交換機に対して送信される呼設定信号のフォーマットを示す図である。
【図８】この発明の実施の形態１による地上交換機から移動局に対して送信される呼出信号のフォーマットを示す図である。
【図９】この発明の実施の形態１による地上交換機から発信して移動局と通話を行う際に無線機故障が発生した場合のシーケンス図である。
【図１０】この発明の実施の形態１による移動局から発信して地上交換機と通話を行う際に無線機故障が発生した場合のシーケンス図である。
【図１１】従来の無線システムによる地上交換機から発信して移動局と通話を行う際に無線機故障が発生した場合のシーケンス図である。
【図１２】従来の無線システムによる移動局から発信して地上交換機と通話を行う際に無線機故障が発生した場合のシーケンス図である。
【符号の説明】
１１，１２　通話無線機、１３　呼制御無線機、２１　無線機状態監視部、２２　無線機状態格納部、２３　呼制御部、３１　移動局、４１　呼制御部、４２無線機選択部、５１　地上交換機、６１　基地局。[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile station, a ground exchange, a radio system, and a radio control method that employ a multiplex configuration.
[0002]
[Prior art]
In a wireless system having a multiplex configuration in which a mobile station includes a plurality of wireless devices, such as a wireless system in a train, it is necessary to control a failure state of the wireless device and perform a normal device selection.
FIG. 11 and FIG. 12 are sequence diagrams for explaining the operation at the time of occurrence of a conventional radio device failure. FIG. 11 is a sequence diagram when a call is made from the terrestrial exchange 51 to make a call with the mobile station 31, and FIG. 12 is a sequence diagram when a call is made from the mobile station 31. In the figure, it is assumed that the mobile station 31 has mounted therein radios A and B having different frequencies, and the radio A has failed.
[0003]
In FIG. 11, when a call is made from the terrestrial exchange 51 to make a call with the mobile station 31, the terrestrial exchange 51 notifies the mobile station which of the radios A and B to use by a call setting signal transmitted to the mobile station 31. I do. Normally, the terrestrial exchange 51 determines a radio device for performing a call based on the traveling direction of the mobile station. At this time, since the ground exchange 51 does not know that the wireless device A has failed, the wireless device A may be selected. In that case, the communication between the mobile station 31 and the ground exchange 51 is a silent communication.
[0004]
Also, when a call is made from the mobile station 31 to make a call with the terrestrial exchange 51 in FIG. 12, the terrestrial exchange 51 transmits a call signal transmitted from the mobile station 31 to the call setup signal, The information is set and notified to the mobile station 31. In this case as well, a malfunctioning radio A may be selected, and as a result, a silent call occurs.
[0005]
[Problems to be solved by the invention]
Since the conventional wireless system is configured as described above, the selection method of the wireless device by the ground exchange is determined by the traveling direction of the mobile station regardless of the failure state of the wireless device, and is selected. When the wireless device is out of order, there is a problem that a call state is reached in the sequence, but no sound is transmitted (silence).
[0006]
Further, if the fault condition of the radio equipment of the mobile station is constantly monitored by the ground exchange, there is a problem that the load on the ground exchange and the traffic of the communication line increase.
[0007]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and the ground exchange does not constantly monitor the state of the mobile station radio, and selects a radio that has not failed at the time of connection, thereby achieving silence. It is an object of the present invention to provide a method for controlling the selection of a mobile station, a ground exchange, a wireless system, and a wireless device in which no call state occurs.
[0008]
[Means for Solving the Problems]
A mobile station according to the present invention includes a radio status monitor that periodically monitors whether the status of a radio is normal or a failure, and a radio status storage that stores the status of the radio monitored by the radio status monitor. And a call control unit that sets the state of the radio equipment stored in the radio equipment status storage unit in a signal of a sequence leading to a call with the ground exchange and notifies the ground exchange.
[0009]
The terrestrial exchange according to the present invention includes a radio selection unit that selects a normal radio based on information indicating whether the status of the radio set in the sequence signal from the mobile station is normal or failure. is there.
[0010]
In the radio system according to the present invention, the mobile station stores a radio status monitor that periodically monitors whether the status of the radio is normal or a failure, and stores the status of the radio monitored by the radio status monitor. A radio status storage unit, and a call control unit that sets a radio status stored in the radio status storage unit in a signal of a sequence leading to a call with the ground exchange and notifies the ground exchange of the status, The exchange includes a radio selection unit for selecting a normal radio based on information indicating whether the status of the radio set in the sequence signal from the mobile station is normal or faulty.
[0011]
According to a method for selecting and controlling a radio device according to the present invention, a mobile station sets information on whether the status of a radio device is normal or fault in a signal of a sequence leading to a call with a terrestrial exchange, and the terrestrial exchange receives the received radio signal. A normal radio is selected based on information on the status of the radio.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a block diagram showing a configuration of a wireless system according to Embodiment 1 of the present invention. In the figure, 31 is a mobile station, 11 and 12 are call radios, 13 is a call control radio, 21 is a radio status monitor, 22 is a radio status storage, 23 is a call controller, 51 is a land exchange, 41 Is a call control unit, 42 is a radio selection unit, and 61 is a base station.
[0013]
The mobile station 31 employs a multiplexing configuration with the call radios 11 and 12. The mobile station 31 has a radio status monitor 21 and a radio status storage 22. The radio transceivers 11 and 12 are periodically monitored for failure status by the radio status monitor 21, and the monitoring results are stored in the radio status storage 22. The call sequence between the mobile station 31 and the ground exchange 51 is controlled by the call control unit 23 of the mobile station 31 and the call control unit 41 of the ground exchange 51. The ground exchange 51 has a radio selection unit 42 for selecting a radio to be used for a call.
[0014]
Next, the operation will be described.
FIG. 2 is a flowchart of the wireless device state monitoring process of the mobile station 31.
Step ST1 is a process when the mobile station 31 is started up, and an initial state (normal) is set in the wireless device state storage unit 22 with respect to the failure state of the communication wireless devices 11 and 12 included in the mobile station 31.
[0015]
Immediately after the mobile station 31 is started up, the radio equipment state monitoring unit 21 starts monitoring the call radios 11 and 12 at regular intervals. In step ST2, the radio equipment state monitoring unit 21 determines the failure state of the communication radio equipment 11, and if a failure is detected, records the failure of the communication radio equipment 11 in the radio equipment state storage unit 22 in step ST3. If it is determined in step ST2 that the call radio 11 is in a normal state, the fact that the call radio 11 is normal is recorded in the radio state storage unit 22 in step ST4. Similarly, in step ST5, the radio status monitoring unit 21 determines the failure status of the radio transceiver 12, and if a fault is detected, the radio status storage unit 22 stores the fault of the radio radio 12 in step ST6. If it is determined that the state is normal, the normal state is recorded in step ST7. When the processing up to this point is completed, the process proceeds to step ST8, and when a preset monitoring time has come, the process returns to step ST2 again to perform a periodic monitoring process.
[0016]
Next, processing during a call between the mobile station 31 and the ground exchange 51 will be described. FIG. 3 is a sequence diagram according to the first embodiment when a call is transmitted from the terrestrial exchange 51 and a call is made with the mobile station 31.
When a call is made from the ground exchange 51 to communicate with the mobile station 31, a paging request signal is transmitted to the mobile station 31 first. When the mobile station 31 receives the paging request signal via the call control radio 13, the call control unit 23 reads out the failure information of the call radios 11 and 12 from the radio status storage unit 22. The content of the read failure information is set as an information element of a paging response signal transmitted to the ground exchange 51. FIG. 4 is a diagram showing a format of a paging response signal transmitted from the mobile station 31 to the ground exchange 51. The failure information of the calling radio device 11 is stored in 401 in the figure, and “0” is set if it is normal, and “1” is set if it is failure. Similarly, the failure information of the communication radio 12 is set to 402 in the figure.
[0017]
The call control unit 41 of the terrestrial exchange 51 that has received the paging response signal from the mobile station 31 extracts the failure information of the wireless device from the paging response signal and notifies the wireless device selection unit 42 of the information. The radio selection unit 42 notified of the radio device failure information selects one of the radio devices 11 and 12 according to the traveling direction according to the conventional selection method if both the radio devices 11 and 12 have not failed. I do. On the other hand, if the call radio 11 has failed, the call radio 12 is selected, and if the call radio 12 has failed, the call radio 11 is selected.
[0018]
The radio selection unit 42 returns the selection result to the call control unit 41, and the call control unit 41 receiving the result sets the content as an information element of a call setting signal to be transmitted to the mobile station 31. FIG. 5 is a diagram showing a format of a call setting signal transmitted from the terrestrial exchange 51 to the mobile station 31. The information of the wireless device selected by the wireless device selection unit 42 is stored in 501 in the figure and transmitted to the mobile station 31.
[0019]
Next, a process for making a call from the mobile station 31 to make a call with the ground exchange 51 will be described.
FIG. 6 is a sequence diagram when a call is transmitted from the mobile station 31 and communicates with the ground exchange 51 according to the first embodiment.
In the mobile station 31, first, the call control unit 23 reads out the failure information of the call wireless devices 11 and 12 from the wireless device state storage unit 22. Next, the content of the read failure information is set as an information element of the call setting signal transmitted to the ground exchange 51. FIG. 7 is a diagram showing a format of a call setting signal transmitted from the mobile station 31 to the ground exchange 51. The failure information of the calling radio device 11 is stored in 701 in the figure, and is set to “0” if normal and “1” if failure. Similarly, the failure information of the communication radio 12 is set to 702 in the figure.
[0020]
The call control unit 41 of the terrestrial exchange 51 that has received the call setting signal from the mobile station 31 extracts the failure information of the wireless device from the call setting signal and notifies the wireless device selecting unit 42 of the information. The radio selection unit 42 notified of the radio device failure information selects one of the radio devices 11 and 12 according to the traveling direction according to the conventional selection method if both the radio devices 11 and 12 have not failed. I do. On the other hand, if the call radio 11 has failed, the call radio 12 is selected, and if the call radio 12 has failed, the call radio 11 is selected.
[0021]
The radio selection unit 42 returns the selection result to the call control unit 41, and the call control unit 41 receiving the result sets the content as an information element of a call signal to be transmitted to the mobile station 31. FIG. 8 is a diagram showing a format of a call signal transmitted from the ground exchange 51 to the mobile station 31. Information on the radio selected by the radio selector 42 is stored in 801 in the figure and transmitted to the mobile station 31.
[0022]
FIG. 9 is a sequence diagram when a radio failure occurs when a call is transmitted from the ground exchange 51 to the mobile station 31. Here, it is assumed that the call wireless device 11 of the mobile station 31 has failed. The mobile station 31 that has received the paging request signal from the terrestrial exchange 51 sets the paging response signal as shown in FIG. 4 that the radio transceiver 11 is in a failure state. The terrestrial exchange 51 that has received the paging response signal can know the failure of the call radio 11 and selects the call radio 12. Then, as shown in FIG. 5, by specifying the call radio 12 with the call setting signal, a normal call can be made.
[0023]
FIG. 10 is a sequence diagram when a radio failure occurs when a call is transmitted from the mobile station 31 to the ground exchange 51. Here, it is assumed that the call wireless device 11 of the mobile station 31 has failed. The mobile station 31 sets, as shown in FIG. 7, a call setting signal indicating that the call radio 11 is in a failure state. The terrestrial exchange 51 that has received the call setting signal can know the failure of the call radio 11 and selects the call radio 12. Then, as shown in FIG. 8, by specifying the calling radio device 12 by the calling signal, a normal call can be made.
[0024]
As described above, according to the first embodiment, in a call between the mobile station 31 and the terrestrial exchange 51, the failure state of the wireless device of the mobile station 31 adopting the multiplex configuration is determined by the signal of the sequence leading to the call. Is notified to the ground exchange 51 as an information element, and the ground exchange 51 uses the information to select a non-failed communication radio at all times. The effect that deterrence can be obtained is obtained.
[0025]
According to the first embodiment, the monitoring of the failure state of the wireless device is periodically performed by the wireless device state monitoring unit 21 of the mobile station 31, and the result is stored in the wireless device state storage unit 22, and the communication is performed. In some cases, the call control unit 23 reads the information in the wireless device state storage unit 22 and sets the information in the signal transmitted to the terrestrial exchange 51, so that the mobile station itself can efficiently monitor the failure state of the wireless device. Is obtained.
[0026]
【The invention's effect】
As described above, according to the present invention, the terrestrial exchange always monitors the radio of the mobile station without increasing the traffic on the communication line and incurring the processing load of the terrestrial exchange. This has the effect of allowing the user to make a selection and guaranteeing a call between the mobile station and the ground exchange.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a wireless system according to a first embodiment of the present invention.
FIG. 2 is a flowchart of a wireless device state monitoring process of the mobile station according to the first embodiment of the present invention.
FIG. 3 is a sequence diagram when a call is made from the terrestrial exchange according to the first embodiment of the present invention and a call is made with a mobile station.
FIG. 4 is a diagram showing a format of a paging response signal transmitted from the mobile station to the ground exchange according to the first embodiment of the present invention.
FIG. 5 is a diagram showing a format of a call setting signal transmitted from the terrestrial exchange to the mobile station according to the first embodiment of the present invention.
FIG. 6 is a sequence diagram when a call is transmitted from the mobile station according to the first embodiment of the present invention and a call is made with a ground exchange.
FIG. 7 is a diagram showing a format of a call setup signal transmitted from the mobile station to the terrestrial exchange according to the first embodiment of the present invention.
FIG. 8 is a diagram showing a format of a call signal transmitted from the terrestrial exchange to the mobile station according to the first embodiment of the present invention.
FIG. 9 is a sequence diagram in a case where a radio equipment failure occurs when a call is made from the terrestrial exchange according to the first embodiment of the present invention and a call is made with a mobile station.
FIG. 10 is a sequence diagram when a radio equipment failure occurs when a call is made from a mobile station according to the first embodiment of the present invention and a call is made with a ground exchange.
FIG. 11 is a sequence diagram when a radio failure occurs when a call is made from a ground exchange using a conventional radio system to a mobile station.
FIG. 12 is a sequence diagram when a radio failure occurs when a call is made from a mobile station using a conventional radio system to a ground exchange.
[Explanation of symbols]
11, 12 call radio, 13 call control radio, 21 radio status monitor, 22 radio status storage, 23 call controller, 31 mobile station, 41 call controller, 42 radio selector, 51 ground exchange , 61 base stations.

Claims (4)

複数の無線機を有し、地上交換機により選択された無線機を用いて地上交換機と通信を行う移動局において、
無線機の状態が正常か故障かを定期的に監視する無線機状態監視部と、
上記無線機状態監視部によって監視された無線機の状態を格納する無線機状態格納部と、
上記無線機状態格納部に格納された無線機の状態を、地上交換機との通話に至るシーケンスの信号中に設定して地上交換機に通知する呼制御部とを備えた移動局。A mobile station that has a plurality of radios and communicates with the ground exchange using the radio selected by the ground exchange,
A radio status monitor that periodically monitors whether the status of the radio is normal or faulty;
A radio status storage unit that stores the status of the radio monitored by the radio status monitoring unit,
A mobile station comprising: a call control unit configured to set a state of a radio device stored in the radio device status storage unit in a signal of a sequence leading to a call with the ground exchange and notify the ground exchange. 移動局からのシーケンス信号中に設定された無線機の状態が正常か故障かの情報に基づいて、正常な無線機を選択する無線機選択部を備えた地上交換機。A terrestrial exchange provided with a radio selection unit for selecting a normal radio based on information on whether the status of the radio set in a sequence signal from a mobile station is normal or faulty. 複数の無線機を有する移動局が、地上交換機により選択された無線機を用いて地上交換機と通信を行う無線システムにおいて、
上記移動局は、無線機の状態が正常か故障かを定期的に監視する無線機状態監視部と、上記無線機状態監視部によって監視された無線機の状態を格納する無線機状態格納部と、上記無線機状態格納部に格納された無線機の状態を、地上交換機との通話に至るシーケンスの信号中に設定して地上交換機に通知する呼制御部とを備え、
上記地上交換機は、移動局からのシーケンス信号中に設定された無線機の状態が正常か故障かの情報に基づいて、正常な無線機を選択する無線機選択部を備えたことを特徴とする無線システム。In a wireless system in which a mobile station having a plurality of radios communicates with a ground exchange using a radio selected by the ground exchange,
The mobile station includes a radio status monitoring unit that periodically monitors whether the status of the radio is normal or a failure, and a radio status storage unit that stores the status of the radio monitored by the radio status monitoring unit. A call control unit that sets the state of the wireless device stored in the wireless device state storage unit in a signal of a sequence leading to a call with the ground exchange and notifies the ground exchange.
The above-mentioned terrestrial exchange has a radio selection unit for selecting a normal radio based on information indicating whether the status of the radio set in the sequence signal from the mobile station is normal or faulty. Wireless system. 複数の無線機を有する移動局が地上交換機と通信を行う際の、地上交換機による無線機の選択制御方法において、
上記移動局が、上記地上交換機との通話に至るシーケンスの信号中に無線機の状態が正常か故障かの情報を設定し、
上記地上交換機が、受け取った無線機の状態についての情報に基づいて、正常な無線機を選択することを特徴とする無線機の選択制御方法。When a mobile station having a plurality of radios communicates with a terrestrial exchange, a method of controlling selection of radios by the terrestrial exchange,
The mobile station sets information on whether the state of the radio is normal or fault in a signal of a sequence leading to a call with the ground exchange,
A wireless device selection control method, wherein the ground exchange selects a normal wireless device based on the received information on the status of the wireless device.
JP2002166093A 2002-06-06 2002-06-06 Mobile station, ground exchange, radio system and radio selection control method Expired - Fee Related JP3904980B2 (en)

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