JPS61131924A - Selective calling system in multi-channel access system - Google Patents

Abstract

PURPOSE:To attain simply response calling after absence by applying automatically a selective calling base on a caller station number of the selective call control signal stored by an incoming call at absence. CONSTITUTION:When the absence state of a radio equipment is released by key operation, the presence of an incoming call at absence is discriminated and when an incoming call exists, a call number of an opposite station and a message or the like are displayed on a display device 17 from a RAM14. Then the presence of a calling request is discriminated from the displayed data and when a call signal for plural absence incoming calls is stored in the RAM14, the stored content is displayed sequentially on the display device 17 by applying plural number of times of storage check operations. When the operator applies key operation for calling as to the incoming calls requiring call back request, a radio equipment uses a call number of the opposite station displayed on the device 17 to apply automatically the selective calling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a selective calling method for a multi-channel access system, and more particularly to a selective calling method relating to incoming calls during absence.

[Technical background of the invention]

Multi-channel access (MCA) systems are generally
As shown in FIG. 3, there are a plurality of independent subscriber groups A, B, . . . consisting of a mobile station 1 and a command station 2, and these groups A,
It is composed of a control station 3 that controls B, . . .

This MCA system allows for selective calling (selecall), which allows a specific station to be called when selected. In other words, when performing a select call using the MCA system, first, after powering on mobile station 1 and command station 2,
The broadcast signal of the A control station 3 is received, frame synchronization is established, and the system code of the control station 3 is confirmed.

Next (a calling station, for example, the command station 2, specifies a specific partner station and sends a calling signal 4 to the MCA control station 3. In response to this calling signal 4, the control station 3 Verify whether the own station code and the other party's mobile station code meet the specified conditions (if the conditions are met in this verification,
A channel designation signal 5 for designating a vacant channel, a reservation signal 6 for giving a reservation when there is no vacant channel, a congestion signal 7 for notifying that when a reservation cannot be made, etc. are transmitted. When the command station 2 and the partner station receive the channel designation signal 5 from the control station, they check that the frequency of the designated channel matches the communication channel written in the storage devices of the mobile station 1 and the command station 2. If they match, check the communication channel (switch) to the designated communication channel.Then, as the other station (called station) receives the select call control signal shown in Figure 4 (shown in Figure 4) sent from the calling station, A select call had been established between the calling station and the other party.

That is, when a select call control signal transmitted from the calling station is transmitted to the called station, the called station transmits a response select call control signal to the calling station. As a result, a select call is established between the calling station and the called station. Messages were then transmitted from the calling station to the called station.

By the way, when receiving a call from the calling station, the called station stores and displays the selected calling number of the calling station, and when the call channel is disconnected after the call, the selected calling station that was memorized and displayed is The call number was deleted and the call was completed. Additionally, if the called station remembers that you are absent, the called station stores and displays the selective calling number of the calling station without erasing it even if the call channel line is disconnected. knew that there was an incoming call, set the selective calling number of the calling station by operating a switch, etc., and made the call.

[Problems with background technology]

However, in this type of system, only the selective calling number of the calling station is stored and displayed in response to an incoming call when you are absent, so you do not have to use the selective calling number, which is troublesome when talking to a calling station that receives a call when you are absent. There was a problem in that setting operations had to be performed.

[Purpose of the invention]

The present invention was developed in view of the above-mentioned problems, and by storing the call control signal of the calling station, it is possible to detect an incoming call when the calling station is not present, and to easily respond from the called station side to the calling station side. The purpose of this invention is to provide a selective calling method in a multi-channel access system that can be operated.

[Summary of the invention]

The present invention is characterized in that a direct call is made based on the calling station number of the select call control signal stored due to an incoming call when the user is absent.

[Embodiments of the invention]

Embodiments of the present invention will be explained in detail based on the drawings of FIGS. 1 and 2. FIG. 1 is a functional block diagram of a radio device of the present invention, and 11
is a central processing unit (CPU), and this CPU [1 stores R, 0M13, 0M13,
A RAM 14 for storing input data and an input/output port 15 are connected to each other. The input/output boat 15
includes a key manual device 16 for operating the key switch;
A display device 17 for displaying human-powered data and data from the key-powered device 16, and a radio section 18 having an antenna 19 for communicating with other stations are connected to the main station. The radio unit 18 also transmits and receives digital data signals, which separately control the MCA system and Cerecall lines, over a radio line.

It is also connected to the human output port 15 via a modem that performs conversion into an MSK modulated wave.

If the above-mentioned radio device receives the selector control signal shown in FIG. 4, as shown in the flowchart of FIG.
First, in order to perform a missed call operation, in step 100, the wireless device is set to an absent state by key operation. When the MSK modulated wave is received by the radio unit 18 in this state, it is converted into a digital data signal by the modem, and in step 101 it is determined whether it is the own station's select call control signal. If this data signal is a select call control signal of the own station, in step 102 data such as the calling number and message of the other station (calling station) are stored in the RAM 14, and the process proceeds to step 103. Also, if the input data signal is a control signal for a general call, 8
The process proceeds to step 103 without being stored in the person M14. In this step 103, it is determined whether to maintain or cancel the absent state, and if the absent state is to be maintained, step 101
The controller returns to , sequentially receives selector control signals, and repeats the above operation. Further, when a key operation is performed to cancel the absent state of the wireless device, it is determined in step 104 whether or not there is an incoming call during the absentee period.

If there is no incoming call, the missed call detection operation ends and the process moves to another program, and if there is an incoming call, the process proceeds to step 105. In this step 105, it is determined whether or not to perform a memory check by key operation. If the check is not performed, the process proceeds to step 108, which will be described later. When the memory check is performed, in step 106, the radio transmits the calling number and message of the other station from the AM 14. etc. are displayed on the display device 17.

Note that the key operation for canceling the absent state in step 103 and the memory check operation in step 102 can be used together.

Next, in step 107, it is determined whether or not there is a call request based on the data displayed by the memory check, and if there is no request, the process proceeds to step 108. This step 108
is also the destination when the checking operation in step 105 is not performed, and it is determined whether or not the checking of the calling number of the missed call has been completed. And Rin A
When the calling numbers of a plurality of missed calls are stored in M14, the process returns to step 105 and the memory check operation is performed multiple times, so that the stored contents are sequentially displayed on the display device 17.
will be displayed. Next, when the operator performs a call operation by key operation in step 109 regarding the stored contents for which a call request is made, the radio transmits the display device 1.
Automatically performs a select call using the calling number of the partner station displayed on the 7IC as an individual calling number.

Then, in step 110, it is determined whether the call has ended or not. If the call has not ended, the process returns to step 109, and if it has ended, the process proceeds to step 108. In this iOS, if the check of the called number of the other party has not been completed, the process returns to step 105 as described above, and if the check has been completed, the missed call detection operation is ended and the process moves to another program.

Note that the setting of the absent state does not have to be done by key operation on the radio; for example, if the radio is not operated for a predetermined period of time, the CPU 11 determines that the radio is absent and performs a missed call operation. You may also do this.

〔Effect of the invention〕

As described above, the present invention can automatically make a call based on the calling station number of the call control signal stored when a call is received when the user is absent, so there is no need to perform troublesome setting operations for the call. In addition, it is possible to easily make a response call after the person is absent, and the time required to operate the radio device can be saved.

[Brief Description of the Drawings] Fig. 1 is a functional block diagram of a radio device used in the present invention, Fig. 2 is a diagram showing a flowchart according to an embodiment of the present invention,
Figure 3 is a diagram showing a multi-channel access system;
FIG. 4 is a diagram showing the data format of the Selecall control signal. 1.-Mobile station, 2.. Command station, 3.. Control station, 11
...Central processing unit (CPU), 12...Address/
Data bus, 13...R, OM, 14...RAM,
15...I/O port, 16...Key human power device, 1
7...Display device, 18...-Radio section, 19...Antenna, add...Modem. Figure 3 Figure 4

Claims (1)

[Claims] In a selective calling method in a multi-channel access system in which a called station receives a selective call from a calling station using a selective call control signal and stores the selective call control signal,
A selective call method in a multi-channel access system, characterized in that the called station makes a selective call to the calling station that made the selective call during the absence, based on the selective call control signal stored during the absence.