JP3492328B2 - Management device wirelessly connected to slave unit, incoming call method, incoming call notification program, and storage medium - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a public network control unit for accommodating a public network and a base unit side wireless control unit for intermittently transmitting control signals. The present invention relates to a management device wirelessly connected to a slave, an incoming call method for the slave of the management device, an incoming call notification program for the slave for the management device, and a storage medium storing the incoming notification program.

[0002]

2. Description of the Related Art There has been a system for performing remote maintenance from a service center via a public network.

On the client side having a plurality of maintenance target devices, the resources of the public network for maintenance are suppressed as much as possible. Therefore, a centralized management device is installed on the client side and each device is operated through the centralized management device. The main form of receiving maintenance is.

In the past, the centralized management device and each device were connected by wire, but in consideration of the labor and aesthetics when changing the layout, a system for wirelessly connecting the centralized management device and each device has been proposed. It has appeared recently.

PHS (Personal Handyphone System)
An example of a remote maintenance system using is shown in FIG.

[0006] 100 is a client, 101 is a centralized management device,
102 is a central control unit PHS control unit having a PHS self-employed mode base station function, 103 is a central control unit line control unit for accommodating a telephone line in the central control unit 101, and 104 is a central control unit main control unit. is there.

Reference numerals 106A to 106C are PHS slaves that are wirelessly connected to the PHS control unit 102 for centralized control, and 107A to 107C are maintenance target devices.

Reference numeral 108 is a service center, 109 is a maintenance computer for the service center 108, 110 is a line control device on the service center side such as a terminal adapter / modem, 11
1 is a telephone network.

FIG. 5 shows the remote maintenance system shown in FIG.
Service center when requesting maintenance data for
108, central control device main control unit 104, central control device
FIG. 7 is a sequence diagram between the PHS controller 102 and the PHS slave device 106A.

The service center 108 in the remote maintenance system shown in FIG. 4 will be described below based on the sequence diagram of FIG.
An operation when the maintenance target device 107A requests maintenance data from the maintenance target device 107A will be described.

When the operator of the maintenance computer 109 of the service center 108 makes a request for maintenance data of the maintenance target device 107A, the maintenance computer 109 requests the central control unit 101 of the service center side line control unit 110 to the service center side line control unit 110. A call is made by specifying a phone number.

Upon receiving the call request, the service center side line control device 110 sends a call to the central control device 101 via the telephone line network 111.

When the central control unit 101 detects an incoming call M201 from the telephone line network 111 via the central control unit line control unit 103, it sends a response M202 to the telephone line network 111 via the central control unit line control unit 103. I do.

When the service center side line control device 110 detects a response, it notifies the maintenance computer 109 of the partner response. At this point, a telephone line is connected between the service center side line control device 110 and the central control device side line control unit 103, and between the maintenance computer 109 and the central control device main control unit 104 of the central control device 101. Data can be sent and received.

The maintenance computer 109 is a central management unit 101.
A maintenance target device specification request M203 specifying the maintenance target device 107A is transmitted to.

Upon receiving the maintenance target device designation request M203, the central control unit main control unit 104 issues an incoming call request M211 designating the maintenance target device 107A to the central management unit PHS control unit 102. Upon receiving the incoming call request M211, the centralized management device PHS control unit 102 transmits an incoming call signal M221 designating the extension number of the PHS slave device 106A connected to the maintenance target device 107A.

Upon receipt of the incoming call signal M221 in which the extension number of its own station is designated, the PHS handset 106A transmits a link channel establishment request message M222 to the central control unit PHS control unit 102.

Upon receiving the link channel establishment request message M222, the central control unit PHS control unit 102 searches for a communication channel that can be used for communication, and when a communication channel is found, sends a link channel assignment message M223 to the PHS handset 106A. Notifies the communication channel used for communication.

Upon receiving the link channel assignment message M223, the PHS handset 106A shifts to the designated communication channel and sends the RT incoming call response message M224 to the incoming call signal M221.
Is transmitted to the centralized management device PHS control unit 102.

Upon receiving the RT incoming call response message M224, the central control unit PHS control unit 102 sends a CC call setting message M225.
Send to PHS cordless handset 106A.

Upon receiving the CC call setup message M225, the PHS handset 106A sends a CC call setup acceptance message M226 and a CC response message M227 to the centralized management device PHS control unit 102.

Upon receiving the CC response message M227, the central control unit PHS control unit 102 sends the CC response confirmation message M228 to the PHS.
It transmits to the child device 106A and notifies the central control unit main control unit 104 of the incoming call response display M215.

The central control unit main control unit 104 notified of the incoming call response display M215 transmits a maintenance target device response display M204 to the maintenance computer 109 via the central control unit line control unit 103.

When the maintenance computer 109 receives the maintenance target device response display M204 and the PHS handset 106A receives the CC response confirmation message M228, data can be transmitted and received between the maintenance computer 109 and the maintenance target device 107A. Therefore, the maintenance computer 109 transmits / receives maintenance data M232 by transmitting a maintenance data request M231 to the maintenance target device 107A.

Next, a case where the PHS handset 106 is out of service area and cannot respond to an incoming call will be described.

FIG. 6 shows the remote maintenance system shown in FIG.
Requesting maintenance data to the service center, but when the PHS slave device 106A cannot respond to the incoming call, the service center 108, the central control device main control unit 102, and the central control device PHS control unit 103.
FIG. 7 is a sequence diagram between the PHS child device 106A and

Hereinafter, based on the sequence diagram of FIG. 6, in the remote maintenance system shown in FIG.
An operation will be described in the case where the maintenance data is requested from the maintenance target device 107A from 108, but the PHS slave device 106A cannot respond to the incoming call.

The central control unit PHS controller 102 receives the incoming call signal M211.
The operation up to the transmission of is the same as the description of the sequence diagram of FIG.

The central control unit PHS control unit 102 receives the incoming call signal M2
11 If the RT incoming call response message M224 is not received within a fixed time (4 seconds in the PHS standard RCR STD-28) after transmission, the incoming call failure display M212 is notified to the central control unit main control unit 104.

The central control unit main control unit 104, which has been notified of the incoming call failure display M212, transmits a maintenance target device incoming call failure display M601 to the maintenance computer 109 via the central management unit line control unit 103.

The maintenance computer 109, which has received the maintenance target device call failure display M601, instructs the service center side line control device 110 to disconnect, and the service center side line control device 110 disconnects the line.

[0032]

However, the conventional example has the following drawbacks.

If the distance between the PHS handset 106 and the centralized control device 101 is long or there is an obstacle between them, the PHS handset 106 is out of range and cannot receive the incoming signal M211. However, since problems such as long distances and obstacles can be confirmed at the time of installation, once installed in a place where the received electric field strength of PHS radio waves from the central control device 101 is sufficient, it is unlikely in normal operation.

However, in the client 100, in addition to the remote maintenance system, when a cordless telephone using the PHS self-employed mode or a yard cordless system is installed, the signals transmitted by the master units of the respective systems interfere with each other. Therefore, even if the distance is short and there is no obstacle in between, the PHS slave device 106 may be out of range.

The PHS base unit operates once every few seconds to several hundreds of milliseconds.
Control signals are transmitted intermittently for a time of 25 microseconds. PHS by receiving the control signal intermittently
The child device 106 continues to maintain the in-area standby state.

The frequencies at which the control signals for the private mode can be transmitted are determined to be 1898.45 MHZ (12 channels) and 1900.25 MHz (18 channels), and if there are a plurality of PHS systems in the private mode in the neighboring area, they control each other. Signals tend to interfere.

Therefore, most self-employed master units
At the time of resetting, it has a function of monitoring the transmission timing of the control signal of the other master unit and intermittently transmitting the control signal at a timing such that the control signals of the own master unit do not overlap.

However, when operating for a long time, a time zone in which the transmission timings of the control signals of the parent devices overlap due to an error in the clocks of the parent devices is inevitable.

Therefore, in the client 100, if a cordless telephone using the PHS self-employed mode or a cordless system in the premises is installed in addition to the remote maintenance system, the time zone during which the PHS handset 106 is out of range. However, the conventional method has a drawback that acquisition of important maintenance data fails like the sequence of FIG.

An object of the invention according to the present application is to avoid the interference as soon as possible even if the wireless devices and the base units interfere with each other due to the overlapping of the transmission timings of the control signals. An object of the present invention is to provide a management device capable of notifying an incoming call.

[0041]

In order to achieve the above object, the invention according to the present application has a public network control unit for accommodating a public network and a master unit side wireless control unit for intermittently transmitting a control signal. In the management device that wirelessly connects to the slave unit via the master unit side wireless control unit, when the slave unit does not respond when an incoming call request is made to the master unit side wireless control unit, a control signal is transmitted. It is characterized by further comprising means for resetting the master unit side wireless control unit so as to change the transmission timing, and again requesting an incoming call to the master unit side wireless control unit.

[0042]

1 is a block diagram of a remote maintenance system including a centralized management device of the remote maintenance system embodying the present invention.

100 is a client, 101 is a centralized management device,
Reference numeral 102 denotes a PHS control unit having a PHS (personal handyphone system) centralized management device having a base station function in a self-employed mode;
Is a central control unit line control unit for accommodating a telephone line in the central control unit 101, 104 is a central control unit main control unit, 1
04M is a memory, and 105 is a central management unit PHS controller reset unit.

Reference numerals 106A to 106C denote PHS slave devices wirelessly connected to the central control unit PHS control unit 102, and 107A to 107C are maintenance target devices.

Reference numeral 108 is a service center, 109 is a maintenance computer for the service center 108, 110 is a line control device on the service center side such as a terminal adapter / modem, 11
1 is a telephone network.

FIG. 2 shows a service center 108, a central control unit main control unit 104, and a central control unit PHS control unit 102.
FIG. 7 is a sequence diagram between the PHS child device 106A and the PHS child device 106A.

FIG. 3 is a flow chart showing the operation of the central control unit main control unit 104 embodying the present invention. The central control device main control unit 104 is a computer having a built-in memory 104M, and operates by reading a program stored in the memory 104M. The memory 104M is a storage medium that stores a program in a computer-readable manner. The flowchart of FIG. 3 is included in this program.

An embodiment of the present invention will be described below with reference to the sequence diagram of FIG. 2 and the flowchart of FIG.

When the operator of the maintenance computer 109 of the service center 108 requests maintenance data of the maintenance target device 107A, the maintenance computer 109 requests the central controller 101 of the central controller 101 to the service center side line controller 110. A call is made by specifying a phone number.

The service center side line controller 110
When receiving the call request, the call is sent to the central control device 101 via the telephone line network 111.

The central control unit 101, in the empty state, (S
301), a telephone line network through the central control unit line control unit 103
When an incoming call M201 from 111 is detected (S302), a response M2 is sent to the telephone line network 111 via the central control unit line control unit 103.
Perform 02 (S303).

When the service center side line controller 110 detects a response, it notifies the maintenance computer 109 of the partner response. At this point, a telephone line is connected between the service center side line control device 110 and the central control device side line control unit 103, and between the maintenance computer 109 and the central control device main control unit 104 of the central control device 101. Data can be sent and received.

The maintenance computer 109 is the central management unit 1
A maintenance target device specification request M203 specifying the maintenance target device 107A is transmitted to 01.

Upon receiving the maintenance target device designation request M203, the central control unit main control unit 104 (S304)
The central management unit PHS control unit 10 sends the incoming request M211 specifying A.
Perform on 2 (S305).

Central management unit PHS which received the incoming request M211
The control unit 102 is a PHS slave device 106A connected to the maintenance target device 107A.
The incoming call signal M221 designating the extension number is transmitted.

At this time, if the control signal interferes with another PHS master unit in the self-employed mode, the PHS slave unit 106A cannot receive the incoming call signal M221 and sends a response message to the incoming call signal M221. Can not do it.

The central control unit PHS control unit 102 transmits the incoming call signal M221 for a fixed time (standard RCR of PHS).
If the RT incoming call response message M224 is not received within 4 seconds in STD-28, the centralized device main control unit 104 is notified of the incoming call failure display M212.

The central control unit main control unit 104 notified of the incoming call failure display M212 (S307) activates the PHS control unit reset unit 105 to transmit the reset signal M213 to the central control unit PHS control unit 102, The centralized management device PHS controller 102 is reset (S30
8).

When reset, the central control unit PHS control unit 102 performs an initialization process, and when the initialization process ends, the central control unit main control unit 104 displays an initialization end display M21.
Notify 4. The centralized management device main control unit 104 notified of the initialization completion display (M214) (S309) again makes an incoming call request M211 designating the maintenance target device 107A to the centralized management device PHS control unit 102 (S305).

Central management device PHS which received the incoming request M211
In the control unit 102, the PHS slave device 106A connected to the maintenance target device 107A
The incoming call signal M221 designating the extension number is transmitted.

The centralized management device PHS controller 102 transmits a control signal at a timing according to the input of the reset signal M213. In other words, once reset, the central control device PHS control unit 102 changes the timing of transmitting the control signal, and the probability of avoiding interference with other master devices increases. After the central control unit PHS control unit 102 is reset,
It is assumed that the PHS handset 106A can receive the control signal from the centralized management device PHS controller 102.

When the PHS handset 106A receives the incoming call signal M221 in which the extension number of its own station is designated, the PHS handset 106A transmits a link channel establishment request message M222 to the central control unit PHS controller 102.

Upon receiving the link channel establishment request message M222, the central control unit PHS control unit 102 searches for a communication channel that can be used for communication, and when a communication channel is found,
The link channel assignment message M223 is transmitted to the PHS handset 106A to notify the communication channel used for communication.

Upon receiving the link channel assignment message M223, the PHS handset 106A shifts to the designated communication channel and sends the RT incoming call response message M224 to the incoming call signal M221 to the centralized management device PHS controller 102. Upon receiving the RT incoming call response message M224, the central control unit PHS control unit 102
The call setup message M225 is transmitted to the PHS handset 106A.

Upon receiving the CC call setup message M225, the PHS handset 106A sends a CC call setup acceptance message M226 and a CC response message M227 to the centralized management device PHS controller 102.

Upon receiving the CC response message M227, the central control unit PHS control unit 102 sends the CC response confirmation message M228 to the PHS.
It transmits to the child device 106A and notifies the central control unit main control unit 104 of the incoming call response display M215.

The central control unit main control unit 104 notified of the incoming call response display M215 (S306) transmits the maintenance target device response display M204 to the maintenance computer 109 via the central control unit line control unit 103. .

When the maintenance computer 109 receives the maintenance target device response display M204 and the PHS handset 106A receives the CC response confirmation message M228, data can be transmitted and received between the maintenance computer 109 and the maintenance target device 107A. Therefore, the maintenance computer 109 transmits / receives maintenance data M232 by transmitting a maintenance data request M231 to the maintenance target device 107A.

When the second incoming call signal M221 is transmitted, the PHS slave device 106
Even if A cannot return the incoming call response message M224, the PHS handset 106A can almost certainly return the incoming call response message M224 by repeating this operation.

Therefore, when the client 100 has a cordless telephone using the PHS self-employed mode or a yard cordless system in addition to the remote maintenance system, the PHS slave unit 106 is out of range due to a collision of control signals. Even if it happens, there is an effect that the maintenance data can be surely acquired without providing an expensive or complicated device.

In the embodiment shown in FIGS. 2 and 3, the central control device main control unit 104 resets the central control device PHS control unit 102, and then the central control device PHS control unit 102 notifies the initialization completion display M214. Wait for the incoming request M211 again
To the central management unit PHS control unit 102. However, in another embodiment, after resetting the central management unit PHS control unit 102, after waiting for a sufficient time for the central management unit PHS control unit 102 to reset, the incoming request M211 to the central management unit PHS control unit. To do.

Further, in another embodiment, when the incoming call failure display M212 is received from the PHS control unit 102, the incoming call request M211 is once retransmitted without resetting the PHS control unit 102, and the incoming call failure display M212 is again displayed. Is received, the PHS controller 10
Reset 2

Further, in another embodiment, the PHS control unit 102 monitors the control signal of the other wireless system when reset and controls the control signal (at the timing not to collide with the control signal of the other wireless system). An incoming call signal M221). In another embodiment, if the PHS control unit 102 is reset and the control signal of the other wireless communication system is not received, the incoming call request M211 is received.
The maintenance target device call failure display M601 is transmitted to the service center 108 without resending.

In another embodiment, if the incoming call failure display M212 is received even after the incoming call request M211 is sent a predetermined number of times, the maintenance target device incoming call failure display M601 is sent to the service center 108.

In the above explanation, the PHS is the self-employed mode wireless system, but the master unit intermittently transmits the control signal, and the slave unit is out of range due to the interference of the control signal with other master units. The present invention is effective for all other self-employed mode wireless systems that end up.

In the above description, the telephone network 111 is used as the public network, but another public network such as the Internet can be used.

[0077]

As described above, according to the invention of the present application, in the management device using the wireless system in which the master unit intermittently transmits the control signal, the control signal transmitted by the master unit is Even if the wireless system and the control signal collide with each other, the collision of the control signal can be promptly avoided, and the incoming call can be notified to the slave unit.

[Brief description of drawings]

FIG. 1 is a block diagram of a remote maintenance system embodying the present invention.

FIG. 2 is a main control unit 10 of a centralized management device embodying the present invention.
It is a sequence diagram of 2.

FIG. 3 is a central control device main controller 10 embodying the present invention.
FIG. 6 is a flowchart showing the operation of 2.

FIG. 4 is a block diagram of a conventional remote maintenance system.

[Fig. 5] Service center 108, centralized control device main control unit 102, and centralized control device when PHS handset 106A is in range
FIG. 11 is a sequence diagram in a conventional example between the PHS controller 103 and the PHS slave device 106A.

[FIG. 6] Service center 108, centralized control device main control unit 102, and centralized control device when PHS child device 106A is out of service area
FIG. 11 is a sequence diagram in a conventional example between the PHS controller 103 and the PHS slave device 106A.

[Explanation of symbols]

101 Central management device 102 Central control unit PHS control unit 103 Centralized control unit line control unit 104 Central control unit main control unit 105 Centralized control unit PHS control unit Reset unit

Claims (6)

(57) [Claims] 1. A public network control unit for accommodating a public network and a base unit side wireless control unit for intermittently transmitting a control signal, and wirelessly connecting to a slave unit via the base unit side wireless control unit. In the management device, when the slave unit does not respond when an incoming call request is made to the master unit side wireless control unit, the master unit side wireless control unit is set so that the timing of transmitting the control signal changes. A management apparatus comprising means for resetting and again requesting an incoming call to the master unit side wireless control section. 2. The management device according to claim 1, wherein the management device is wirelessly connected to a plurality of slave units connected to a maintenance target device via the master unit side wireless control unit. 3. The management apparatus according to claim 1, wherein when a maintenance target device designation request from a service center is received via the public network control unit, an incoming call request is made to the master unit side wireless control unit. A management device characterized by the above. 4. A public network control unit for accommodating a public network and a base unit side wireless control unit for intermittently transmitting a control signal, and wirelessly connecting to a handset unit via the base unit side wireless control unit. In the method of receiving an incoming call to the slave unit of the management device, when the slave unit does not respond when an incoming call request is made to the master unit side wireless control unit, the master unit is configured so that the timing of transmitting the control signal changes. A method of receiving an incoming call to a child device, comprising resetting a machine-side wireless control unit and again requesting an incoming call to the master-side wireless control unit. 5. A public network control unit for accommodating a public network and a base unit side wireless control unit for intermittently transmitting a control signal, and wirelessly connecting to a slave unit via the base unit side wireless control unit. In the incoming call notification program for the slave unit for the management device, when the slave unit does not respond when the incoming call request is made to the master unit side wireless control unit, the timing for transmitting the control signal is changed. A program for notifying an incoming call to a slave unit, which resets the master unit side wireless control unit and again requests the master unit side wireless control unit to receive an incoming call. 6. A public network control unit for accommodating a public network and a base unit side wireless control unit for intermittently transmitting a control signal, and wirelessly connecting to a handset unit via the base unit side wireless control unit. In a storage medium storing an incoming call notification program for a slave unit for a management device, when a slave unit does not respond when an incoming call request is made to the master unit side wireless control unit, a timing for transmitting a control signal The storage medium storing the incoming call notification program for the slave unit, wherein the master unit side wireless control unit is reset so as to change, and an incoming call request is made again to the master unit side wireless control unit.