JPS6359616B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a status display method for a wireless device using a two-frequency half-duplex multichannel access system (MCA system).

Conventional configuration and its problems In the conventional MCA system, when a connection request cannot be met due to, for example, a call channel being full, the system information and command information in the downlink control signal are used to notify the user. There was a problem in that callers who did not know that they were on standby repeatedly made useless calls even though they were not connected to the communication channel.

OBJECTS OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned conventional drawbacks and to provide a status display method for a wireless device that displays the status when a call cannot be made.

Composition of the Invention The present invention inserts information regarding whether or not a call is possible into a control channel signal, and the terminal station that receives this compares it with the calling number of its own station stored in advance. Among the above-mentioned information on availability, the information in the case of "no" is displayed to prevent unnecessary calls.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows the frame structure of a downlink control signal in the MCA system, which consists of bit synchronization A, frame synchronization B, first block data C, and second block data D. The first block data C includes a system code to which the base station system belongs, a system information b that informs the status of the base station system, a command c as an instruction from the base station to the terminal station, command information d, and a preliminary code e for the command. The system information f includes information on whether reservation acceptance and wide-area acceptance are possible or not, and the types of command information c include channel instructions, simultaneous commands, reservation notifications, congestion, etc.

The second block data D is the system code a.
and a group code f consisting of a user code, and a channel number g of a communication channel designated by the base station.

Next, the operation will be explained.

In the MCA system, the system information b is broadcast from the base station over the control channel, and the terminal station verifies its own system information b and can send a connection request signal only when it is in a state where reservations can be accepted. . The terminal station sends a connection request signal after confirming that the base station of its own system is in a state where reservations can be accepted.

When the base station receives the connection request signal, if there is an empty communication channel, it sends "channel designation" using the command information c, and subsequently specifies the communication channel using the channel number g. If there is no empty call channel and there is space in the reservation queue, the above command information c
will send out a "reservation notification" to notify you that you have been registered in the reservation queue. After that, when a free call channel becomes available, the operation is the same as that of the free call channel. If a connection request cannot be processed due to reasons such as there being no space in the queue, "congestion" is sent as command information c to notify that the connection request has not been accepted.

When the terminal station belonging to the group that requested connection detects a "channel instruction" in the command information c for its own group, it switches to the communication channel specified by the channel number g that is subsequently sent, becomes able to make a call, and is connected to the communication channel. Displays a message indicating that the device is in a call state.

Figure 2 shows the configuration of a device to which the status display method is applied. 1 is a data input terminal from the receiver;
2 is a synchronization detection circuit, 3 is a control signal comparison circuit, 4 is a storage circuit, 5 is a determination circuit, 6 is a display signal generation circuit, and 7 is an optical (LED etc.) or acoustic (speaker etc.) indicator. .

Next, the operation will be explained. When a terminal station waiting on a control channel receives a downlink control signal with a receiver (not shown), it performs bit synchronization and frame synchronization of the downlink control signal with a synchronization detection circuit 2 via a data input terminal 1, and performs control. The signal comparison circuit 3 compares the terminal station's (a) system code (b) command, etc. stored in advance in the storage circuit 4 of the terminal station bit by bit, and the result is judged by the judgment circuit 5. If the control signal is for the own station, depending on the type of system information or command information, the display signal generation circuit 6 displays, for example, "acceptable" or "disabled" reservation acceptance, "reservation notification", "congestion", etc. is activated and displayed on the display 7. This display may be stopped after a predetermined period of time, or may be stopped at the moment the communication channel is connected.

Next, an embodiment in the case of simultaneous paging will be described. In this case, as shown in FIG. 3, the terminal station in standby state uses the command c on the downlink control channel.
When a "simultaneous command" is received, the terminal station in question restricts calls, shifts to the designated call channel number g, and receives the simultaneous command broadcast. At the terminal station that received the "simultaneous command",
An optical or acoustic display indicating that a simultaneous command is in progress is used to alert operators. This display may be displayed for a certain fixed period of time, or may be displayed continuously during the simultaneous command.

FIG. 3 shows a configuration for displaying at the time of simultaneous calling, in which reference numeral 9 denotes a flip-flop, and the same reference numerals as in FIG. 2 represent the same names. In the above configuration, when a simultaneous command is received by command c, the communication channel is switched to the one specified by channel number g, and the simultaneous command broadcast is received, and the flip-flop 9 is set to give an instruction to the drive circuit.
The display unit 7 displays a message indicating that the command is a simultaneous command. In this example, flip-flop 9 remains set while on the speech channel and is reset when the command is completed and the control channel is returned.

What is shown in FIG. 4 is another embodiment, in which
The case where a "channel instruction" is detected is shown, and 10 is a channel number verification section, and the same reference numerals as in other FIG. 2 represent the same names. In the above configuration, after the "channel instruction" is detected by the command c, the channel number verification section 10 compares the received channel number g with the channel number previously stored in the storage circuit 4, and the result judgment circuit 5 If it is determined that a channel number matching channel number g is not stored, an instruction is given to the drive circuit 6,
The display unit 7 displays that the call channel test has been failed.

Effects of the Invention As explained above, according to the present invention, when a terminal station cannot use the communication channel specified by the base station, it is possible to notify the operator of this fact, thereby reducing waste on the part of the operator. It has great practical value, such as eliminating the need to make calls.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a signal configuration of a state storage method of a wireless device according to an embodiment of the present invention, FIG. 2 is a block diagram of a device to which the method is applied, and FIG. 3 is a configuration of another embodiment. FIG. 4 is a block diagram showing the configuration of still another embodiment. 1...Input terminal, 2...Synchronization detection circuit, 3...
Control signal comparison circuit, 4... Memory circuit, 5... Judgment circuit, 6... Drive circuit, 7... Display unit, 10...
Channel number verification department.

Claims (1)

[Claims] 1 consists of a plurality of base stations and a plurality of terminal stations classified into groups, a wireless channel connecting the base station and the terminal station consists of at least one control channel and a plurality of communication channels, and the base station Various control signals are broadcast on the control channel, and the terminal station accesses the control channel of the base station and is assigned a communication channel according to the group to which the terminal station belongs, and each terminal station in the group uses the assigned communication channel. The base station communicates with terminal stations in the same group by relaying the base station, and the base station that receives the connection request from the terminal station can accept reservations on the control channel depending on the type of request and the usage status of the communication channel. , not possible, channel designation, reservation notification, congestion, and simultaneous command, and the terminal station that receives the control channel combines its own system information and command information stored in a storage element in advance. In addition to checking, if the call is not possible, a display to that effect is displayed, and in the case of specifying the channel, if there is a mismatch after checking with the specified call channel stored in the storage element, a message to that effect is displayed. A wireless device status display method.