JP2793566B2 - Digital mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a digital mobile communication system.

[0002]

2. Description of the Related Art In recent years, digital mobile communication systems such as a portable telephone system and a PHS, which enable a telephone call or the like from a mobile station by performing wireless communication between the mobile station and a base station, have become popular.

A base station in this kind of digital mobile communication system is configured by a centralized control system in which a radio channel controller has most of the function of connecting to a mobile station. Further, the radio channel controller also has a fault monitoring function, and the fault monitoring function monitors the fault of the radio base station transmitting / receiving device.

[0004]

SUMMARY OF THE INVENTION In the prior art,
When a failure occurs in the wireless channel control device or a transmission line interconnecting the wireless channel control device and the wireless base station transmitting / receiving device, the wireless channel control device has a call connection function as described above. Therefore, there is a problem that all the mobile stations in the area covered by the radio network controller cannot communicate at all.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and is intended to be applied to a case where a failure occurs in a radio channel controller or a transmission line interconnecting a radio channel controller and a radio base station transceiver. It is an object of the present invention to enable communication between predetermined mobile stations.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is controlled by a first call control means of a radio channel controller connected to a radio base station transmission / reception apparatus. In a digital mobile communication system in which mobile stations communicate with each other via a device and a radio channel controller, a radio base station transmitter / receiver interconnects a radio channel controller and a radio channel controller / radio base station transmitter / receiver. Monitoring means for monitoring a failure of a transmission path to be connected, second call control means for performing a call connection with the mobile station, an information storage unit storing call control information, and transmission / reception control for communicating with the mobile station. When the fault monitoring means detects a fault in a radio channel control device or a transmission path interconnecting a radio channel control device and a radio base station transmitting / receiving device, the fault information is stored in the information storage unit. Based on said call control information are second
Of the radio base station transmission / reception apparatus, thereby enabling communication between mobile stations existing in the zone of the radio base station transmission / reception apparatus.

Further, in the base station return communication of the digital mobile communication system according to the present invention, a call connection means capable of making a call connection with a mobile station in a radio base station transmitting / receiving apparatus, and a fault monitoring means capable of detecting a fault in a radio line control apparatus and the like And

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of a digital mobile communication system according to the present invention.

This embodiment comprises a radio base station transmitting / receiving device 1, a radio channel control device 2, and a mobile station 3. The wireless base station transmitting / receiving apparatus 1 includes a failure monitoring unit 11, a simple call control unit 12, a storage unit 13 for storing call control information and the like, and a transmission / reception control unit 14. The wireless channel control device 2 includes a fault monitoring unit 21 and a call control unit 22.

Next, the operation of this embodiment will be described with reference to FIGS.

FIG. 2 is a flowchart illustrating the operation of the digital mobile communication system shown in FIG.

[0013] The fault monitoring means 11 comprises the radio line control device 2
And a radio base station transmitting / receiving device 1—a radio channel control device 2
The fault monitoring of the transmission line interconnecting between them is performed. When the failure monitoring means 11 detects an abnormality, it notifies the simple call control means 12 of the abnormality (A-1, A-2).

The simple call control means 12 includes the transmission / reception control means 1
4. All downlink communication (communication from base station to mobile station)
Notification of suspension. The transmission / reception control means 14 stops communication with all the mobile stations 3 in the area (A-
3).

The mobile station 3 determines that communication with the radio base station transmitting / receiving apparatus 1 is no longer possible, and performs a perch channel (CC
Move to H).

After notifying that all downlink communication has been stopped, the simple call control means 12 notifies the transmission / reception control means 14 of the broadcast information stored in the storage unit 13.

FIG. 3 is a table showing the contents of the broadcast information message.

The transmission / reception control means 14 controls the control channel (B
The broadcast information (communication within the base station) of the CCH is transmitted to all the mobile stations 3 in the area (A-4). The mobile station 3 receives the broadcast information, and enters the intra-base station communication mode if the content is the intra-base station communication (base station return communication).

After notifying the broadcast information, the simple call control unit 12 notifies the transmission / reception control unit 14 of idle transmission.
In response, the transmission / reception control means 14 transmits an idle (A-5).

After notifying the idle transmission, the simple call control unit 12 notifies the transmission / reception control unit 14 of the incoming signal stored in the storage unit 13. The transmission / reception control means 14 makes an incoming call in the group communication mode to all mobile stations in the area on the incoming call control channel (PCH) (A-
6). Upon receiving the incoming control channel, the mobile station 3 shifts to the designated communication channel and enters the transmission right acquisition state.

The simple call control means 12 waits for a transmission right from the mobile station (A-7).

Next, the operation recovered from the abnormal state will be described.

The fault monitoring means 11 notifies the simple call control means 12 of the recovery when detecting normality. Simple call control means 1
2 notifies the transmission / reception control means 14 of the suspension of all downlink communication. The transmission / reception control means 14 stops communication with all mobile stations in the area.

[0024]

As described above, according to the present invention,
If the mobile stations are communicating with each other within the area covered by one wireless base station transmitting / receiving device, the wireless channel control device (call control) or the wireless channel control device and the wireless base station transmitting / receiving device are interconnected. Even if an error occurs on the transmission line,
The call connection procedure can be performed by the radio base station transceiver.

As a result, the call is temporarily ended, but the call can be made again within the area covered by one radio base station transceiver.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a digital mobile communication system according to the present invention.

FIG. 2 is a flowchart illustrating an operation of the digital mobile communication system shown in FIG. 1;

FIG. 3 is a table showing the contents of a broadcast information message.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Radio base station transmission / reception apparatus 2 Radio line control apparatus 3 Mobile station 11 Fault monitoring means 12 Simple call control means 13 Storage unit 14 Transmission / reception control means 21 Fault monitoring means 22 Call control means

Claims (2)

(57) [Claims] 1. A mobile station, controlled by a first call control means included in a radio channel controller connected to a radio base station transceiver, performs communication between mobile stations via the radio base station transceiver and the radio channel controller. In a digital mobile communication system, a radio base station transmitting / receiving apparatus comprises: a radio channel controller; and a fault monitoring means for monitoring a fault of a transmission line interconnecting the radio channel controller and the radio base station transmitting / receiving apparatus; A second call control unit for making a call connection with the mobile station, an information storage unit for storing call control information, and a transmission / reception control unit for communicating with the mobile station, wherein the failure monitoring unit comprises a radio line control device or When detecting a fault in the transmission path interconnecting the radio line control device and the radio base station transmitting / receiving device, the second call control means controls based on the call control information stored in the information storage unit. To the digital mobile communication system, characterized in that to enable the communication of the mobile station each other present in the zone of the radio base station transceiver. 2. A radio network controller, a fault monitoring means for monitoring a fault of a transmission line interconnecting the radio network controller and the radio base station transmitting / receiving apparatus, and a call control means for performing a call connection with the mobile station. , A radio channel controller or a radio channel controller in a mobile band communication system including a radio base station transmitting / receiving device having an information storage unit storing call control information and a transmission / reception control means for communicating with a mobile station. Equipment
When a failure occurs in a transmission line interconnecting the wireless base station transmitting and receiving devices, a call connection different from the call connection control processing provided in the wireless channel control device to the mobile station in the zone of the wireless base station transmitting and receiving device. A base station return communication of a digital mobile communication system, wherein communication between mobile stations in a corresponding wireless zone is enabled by performing a control process.