KR20050019841A - Method for using a radiotelephone terminal as remote control for automatic devices supplying fee-paying services - Google Patents

Abstract

The present invention relates to a method for providing a user to use a wireless terminal (1) to remotely control an automatic device (3) providing a fee-paying service. In particular, the present invention comprises the steps of the user 2 dialing the control number using his terminal and calling it to the central server 5, storing the control number and identification number of the terminal 1 in the central server 5. After storing in unit 53, the central server is not locked to the line without blocking the connection, verifying the identification of the device 3 based at least on the control number, and the authority of the user (2) verifying, and if the user is authorized to use his terminal to remotely control the device, the device (3) by the central server (5) to issue a command for a particular operation. Transmitting to and executing an operation by the device.

Description

METHOD FOR USING A RADIOTELEPHONE TERMINAL AS REMOTE CONTROL FOR AUTOMATIC DEVICES SUPPLYING FEE-PAYING SERVICES}

The present invention relates to a method for a user to use a wireless telephone terminal as a remote control for an automatic device providing a payment service. The invention is particularly useful, for example, for remotely controlling food or beverage vending machines or for accessing parking lots or hotel rooms with automatic payment means.

Automatic devices such as those described above generally operate by cash or bank card payment, and more recently by cards including electronic wallets. The drawback of these cash payment devices is that the user must have plastic money to meet their needs for consumption or service.

Automatic device control by the wireless terminal via voice or data is transmitted via a graphical (WAP) or text (SMS) interface. The drawback of control over voice is that conversations are not always easy because the control depends on ambient noise. Another drawback of control via voice is that the operation is not immediate because listening to messages by the voice central server and activation of control commands by the server are associated with the long path of the tree structure. The drawback of control over the graphical interface is that the conversation between the terminal and the central server can be long and difficult, taking into account the amount of data to be transmitted and the present size of the terminal screen, respectively. The drawback of control via text is that the input of the message is verbose because the single key of the terminal contains three characters scrolled to select the desired one. Another drawback of control via text is that the network load is significant. Another drawback common to previous types of control by the terminal is that it becomes expensive because the service user pays for both service and wireless telephone calls.

1 and 2 show a block diagram of a method according to the invention.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate certain deficiencies of the prior art, and propose a method of using a wireless telephone terminal as a remote control for a high speed, low cost automatic device.

The object is achieved by a method that enables a user to use a wireless telephone terminal as a remote control for an automatic device that provides one or more payment services, wherein the user dials a control number using his terminal. Calling the control number and identification number from the user via the wireless telephone network to the central server, and subsequently while the central server is blocking without opening the line, identifying and storing in the memory of the central server. And identifying at least the device from the control number, and investigating and inspecting the user's rights, wherein if the user is authorized to use his terminal to remotely control the device, Commands for the operation from the central server Transmitting to the device and a step for executing the operation to the device.

According to another feature, the control number is verbally instructed by the first interface of the device to a user who wishes to use his wireless telephone terminal as a remote control for the automatic device.

According to another feature, the control number is indicated by a message recorded on the first interface of the device to a user who wants to use his wireless telephone terminal as a remote control for the automatic device.

According to another feature, the step of identifying the device comprises: referencing by the central server a lookup table between the type of device and the control number, each of which is explicitly identified by a control number, and receiving by the central server; Extracting the type of device from the lookup table from the control number.

According to another feature, the step of identifying the device comprises: asking the operator by the central server to know the geographical location of the user, ie the cover area defined by the user and the surrounding base station where the device is found; Sending a message indicating the geographical location of the device from the operator to the central server after the step, wherein the geographical location of the device, each of which is explicitly identified by a control number and a geographical location, and the lookup table between the devices; Referencing by a central server, and extracting a type of device from a lookup table from the control number received by the central server.

According to another feature, investigating and inspecting the user's rights includes an identification number, in particular an MSISDN number of the user authorized to use his wireless telephone terminal as a remote control for one or more determined automated devices, Referencing the list of registered users by the central server and comparing the list of registered users with the received identification and control number.

According to another feature, if the user is not authorized to use his wireless telephone terminal as the remote control for the device, the central server establishes wireless communication with the user and gives the user his wireless telephone terminal as the remote control for the device. Notify you are not authorized to use it.

According to yet another aspect, the step of sending a command to the device for an action determined by the central server comprises the steps of: sending an execution command message to the device by the central server via a wireless telephone network or a wired network; Receiving the execution command message by a wireless telephone communication module.

According to another feature, the device executes an operation by a control module.

According to another feature, when the device proposes a single service, it is the device that provides the service to the user to execute an operation by the device.

According to another feature, if the device proposes several services, different control numbers are associated with each service, and performing an operation by the device provides the user with a service associated with the control number dialed by the user. Device.

According to another feature, if the device proposes several services, a unique control number is associated with the device, and executing an operation by the device enables the second contact interface to allow the user to select a service. Device, and a device that provides a service selected by the user.

According to yet another feature, if the device provides a desired service to a user, storing the service provided by a device of a memory included in the device after executing an operation by the device, and the central server and the Charging for the service by the wireless telephone operator via the device is followed.

According to another feature, the charging step includes a successful execution message of the operation via the communication module of the central server comprising at least one identifier of the device, the service performed, the cost of the service and the time the service was provided. Sending to.

According to another feature, the successful execution message of the operation is stored in a memory of a central server and is associated with an identification number of the terminal of the user by the central server, wherein the central server sends a service charging message for the user to the operator. The charging message includes at least an identification number of the terminal of the user and a price to be paid by the user.

According to another feature, the operator stores the charging message in the server memory of the operator.

According to another feature, if the device has not provided the desired service to the user, the device notifies the user that an error has occurred using the first interface, sends an error message to the central server, and the error message is At least the identifier of the device, the desired service and the time at which the error occurred.

According to another feature, the central server stores the error message in a memory and sends an information message to the user via the wireless network to notify the user that an error has occurred.

Other features and advantages of the present invention will become more apparent upon reading the following description with reference to the following drawings.

In figure 2, a user 2 with a radiotelephone terminal stands in front of an automatic device 3 with which he wishes to remotely control his terminal 1. The automatic device 3 comprises a computer system comprising a verbal or document communication interface 31 with a user 2 and a memory 34. The interface 31 displays or verbally speaks to the central server 5 first by dialing a number, so-called control number, to remotely control the device 3. For example, the greeting sent by the interface 31 of the beverage vending machine 3 may be "Dial XXXX to get a beverage through operator YYY!". The control number should be as short as possible so that the user 2 can access the desired service as soon as possible, and long enough so that a sufficient number of automatic devices 3 can be used by the method according to the invention. The number of digits constituting the control number is preferably 4, but the number of digits may be between 1 and 10. With the globalization of the whole, the size of the control number can be reduced considerably, efficiently and usefully.

If the automatic device 3 proposes several services, several control numbers can be assigned to the device 3, each number permitting execution of only one of the services. For example, for a beverage vending machine that delivers several different products, different control numbers are associated with each of the products proposed by the vending machine. In this embodiment with a device proposing several services, the device 3 comprises one interface 31 per available service. These different interfaces 31 are identical to the verbal or document interface if the user 2 is activated after pressing a button corresponding to the selected service, and preferably the document interface if both are activated simultaneously to avoid any confusion.

In order to benefit from the method according to the invention, the user 2 with the radiotelephone terminal 1 must register in advance with the telephone operator 6 side which proposes the method according to the invention.

When the user 2 dials the appropriate control number on his radiotelephone terminal 1, a call is sent to the terminal 1 towards the nearest base station 4 via a radio network, for example a GSM network. . The call is transmitted from the nearest base station to the terminal 1 via a wireless network towards one or several central servers 5. The radiotelephone operator 6 managing the method can geographically distribute several central servers 5, with each central server 5 responding only to calls in the determined geographical area.

For simplicity of explanation, the remainder of the method is described taking into account only a single central server 5. The central server includes at least a computer system including at least memory 53. When the central server 5 receives a call from the terminal 1, i.e., the owner who wants to remotely control the automatic device 3, the central server 5 receives an identification number of the terminal 1, for example. For example, the MSISDN number and the control number of the memory 53 are recorded, and the call is blocked without opening the line. Thereby the user 2 may not pay any cost for the telephone call, thus the method according to the invention is cheaper and much faster than the conventional method described above.

The central server 5 also includes a list of authorized users in order to benefit from the method according to the invention which has been registered in advance on the operator 6 side. The list, the so-called registered user list 51, associates each user's identification number with the service the user subscribes to, i.e. the type of device he wishes to remotely control. A user may be expected to be registered only for a certain type of device. The central server 5 also includes a table, namely a lookup table, which associates different control numbers with different devices 3. The central server 5 records the control number and identification number of the terminal 1, refers to the lookup table 52 to identify the device 3 from the control number, and from the identification number Refer to the list of registered users 51 to find out the authority. If the user 2 is not authenticated to remotely control the device 3 in front of which he stands, the central server 5 establishes communication with the user's radiotelephone terminal 1 and then, for example, For example, to inform the user that he is not authorized to remotely control the device 3, a message as text is transmitted to the user or verbally contacted with the user via a wireless telephone network. In an alternative embodiment of the invention, the central server 5 sends the message to the device 3 via its interface 31 to notify the user 2 that he is not authorized to remotely control the device. send. On the other hand, if the user 2 is authenticated to remotely control the device 3 in front of which he stands, the central server 5 causes the device 3 to perform the desired action by the user 2. Message, a so-called execution command message, is transmitted to the related device 3. The message is transmitted by means of communication selected by the user, for example a dedicated line, a fixed line, GSM, GPRS, SMS, R-LAN (Bluetooth or Wi-Fi type, in particular 802.11) line or the like.

In an alternative embodiment of the invention, the execution of the terrain dependence of the device is such that the lookup table 52 also associates each control number / device type pair 3, the geographical location of the user 2 of the defined area. . Thereby, the same control number is usefully assigned to several devices each located near different defining areas. The location of the user may be performed by a network according to different methods (calculation of the location according to the waveform received by the base station, the cell of the base station, the terminal, etc.). In the above selection, the central server 5, after recording the identification and control number of the memory 53, what is the area where the user 2 is found and what is the area where the device 3 is found? To find out, contact the radiotelephone operator 6 by the service logic. The information is available by applying a method associated with the wireless telephone network providing the information. By matching both pieces of information, the requested service can be executed. The operator 6 comprises a computer system for searching the geographical position information of the memory 61 which is a recorded call passing through different base stations 4. The operator 6 sends the geographical position information to the central server 5, which writes the information in its memory 53. The central server 5 then checks the lookup table 52 to identify the device 3 according to the control number received from the user 2 and the geographical location of the device received from the operator 6. Please note. The rest of the procedure, i.e. the authority check of the user and the transmission of the execution command message from the central server 5 to the relevant device 3 are the same.

In another alternative, the central server 5 manages a device having a terrain dependent control number and a device having a terrain independent control number at the same time. When the central server 5 extracts several devices corresponding to the same control number from the lookup table 52, the central server 5 sends the operator to the operator to have access to the geographical location of the device 3 as described above. Question, then checks the user's permissions and sends a run command message to the device. When the central server 5 extracts a single device corresponding to the determined control number from the lookup table 52, the central server 5 checks the user's authority without asking the operator about the geographical location of the device. The command is then sent to the device. The selection example is adapted to a predetermined action that can be triggered regardless of the user's standing position, for example two hours before the user's arrival, automatically switching on the heating of the second home with his mobile phone. Allows the user to ignore the distance However, the second example has the drawback of the loss of the concept of proximity. In addition, since the user is not in front of the device delivering the desired service, the user cannot check whether he has dialed the appropriate control number, and cannot check whether he has triggered another device incorrectly.

The device 3 on the one hand communicates with the electronic control module 33 and on the other hand at least one communication module 32 which communicates with the central server 5 via a wireless telephone network or via a wired network, and Computer system including memory 34. When the communication module 32 communicates with the central server via the GSM network, the communication module 32 has a SIM card. The communication module receives an execution command message received from the central server and transmits the command to the control module 33 for executing the operation. In the case of a device 3 proposing a single service, the execution of the operation by the control module 33 is to provide the service to the user 2. Examples of possible services are given below.

In the case of a device 3 suggesting several services, the execution of the operation by the control module 33 is to perform several different services accessible to the user 2. The user 2 then selects the service desired by the user, for example via a system of keys indicating the available services, the device providing the service to the user. On the other hand, if several control numbers are assigned to the device 3, each control number is associated with a unique service, and execution of an operation by the control module 33 is directed to the user 2 on the dialed control number. To provide a corresponding service.

Immediately after the user 2 has the desired service, the device 3 communicates via the communication module 32 with at least the identifier of the device 3, the provided service, the cost and time of execution of the service, or The execution message of the successful operation including the error message when the service cannot be provided is transmitted to the central server 5. The error message comprises the identifier of the device 3, the service to be performed, the report of the error or the time at which the error occurred. The execution message of the successful operation and the error message are recorded in the memory 34 of the vending machine 3. In an alternative embodiment of the invention, the device 3 is capable of the successful execution of packets of several messages after subsequent executions for remote control of the device 3 have been made for different users 2. Sends an action message and an error message of the operation. The successful run or error message is sent by " texting " (" SMS ") or via the wired network or the wireless telephone network in GPRS mode.

The central server 5 receives the successful execution and / or error message and stores it in its memory 53. The central server 5 may be, for example, by a time when execution occurs or when an error occurs, which is only slightly later than the time when the central server 5 transmits an execution command message to the device 3. Associate each incoming message with the user's identification number. In the case of success, the central server 5 sends a charging message to the operator 6 via a wired or wireless telephone network. The charging message is sent only when an execution has occurred. The charging message includes the identification number of the user 5 and the price charged.

If an error occurs and execution cannot occur, the device 3 indicates or verbally describes the error via its interface 31 and specifies what the error is (for example: "the service above"). Is no longer available "). After receiving the error message from the device 3, the central server 5 also transmits a message in text form (SMS) to the user or by verbally contacting the user, for example. Through the terminal 1 of the user can be informed of the fact. In an alternative embodiment, the central server may also notify the entity operating the device 3 to report abnormalities.

The user may subscribe to another operator having a roaming agreement with the operator 6. In this case, the operator 6 managing the method according to the invention sends a bill to the operator to whom the user 2 of the method subscribes and which is in accordance with the roaming contract.

In addition, the central server 5 and the operator 6 periodically communicate with each other to update the list 51 of registered users and the lookup table 52.

The method according to the invention is applicable to a number of fields in which certain non-limiting examples are listed below:

E-commerce field:

Accessing a public parking lot (the device is described in detail later)

Paying the parking fee with the ticket machine system (the device is described in detail later),

-Toll gate,

-Update the order,

-Settlement of invoices,

-Electronic identification and signature,

-Emergency calls,

-Hotel services; Arrival, Departure, Room Key, Room Service, etc ...

Fast-food: vending machine (the device is described in detail later),

Control and remote monitoring:

-Lighting, signaling, parking control,

-Display control,

-Wireless security items, remote control: heating, electricity, etc ...,

-Home automation,

- watch,

-Alarm: water, fuel tank etc ...,

-Out of stock: automatic system,

-Fleet management: analysis, tracking, etc ...,

-Equipment: irrigation, power supply, environmental control, etc ...

·Combination:

-Sports: Predictions, Betting, etc ...,

-Games: voting, choice, etc ...,

-Clubs: Registration, Reservations, etc ...

Recall that a system for applying the method for operation should include a list of clients for the service, these clients being not only external clients that have previously registered for the service, but all of the clients of the operator managing the method or It may be part of, and the list is entirely necessary to identify the user and possibly charge the client the cost of the service. The system should also include the rights associated with each client, a dialing system identifying a remotely controlled device, possibly accessing the geographic location of the user's terminal and one or several central servers.

The following describes in detail the application of the method according to the invention to an example of an automatic beverage vending machine.

The consumer 2 is in front of the vending machine. The vending machine includes a "black box" detailed below, instead of the conventional coin tester. The consumer 2 can read a message urging the user to use his terminal 1 to take out a beverage in front of the vending machine. The consumer 2 who tries to take out the beverage dials the control number displayed on the vending machine. His call is automatically routed to a central server, which receives the call and analyzes the call data (user's identification number and control number), but does not open the line.

By recognizing the dialed control number, by its service logic the central system 5 queries the wireless telephone network to find the geographical location of the mobile phone. With the location information, the central system 5 associates the dialed control number with the vending machine 3 located in the area around the consumer 2 via the lookup table 52. The central server 5 checks the authority of the user in the list of registered users 51.

The central system 5 sends commands to the vending machine via a communication network (as in the case, the communication network is a fixed network, a specialized line, a GSM network, a wireless network, etc.).

The black box of the vending machine 3 is for example a communication module 32 which is a GSM or GPRS module with a SIM card, which communicates with the electronic control module 33 on the one hand and with the central server 5 on the other hand. It includes. The communication module 32 receives an operation execution command from the server and sends the command to the control module 33, so as to select the item of the vending machine or the indicated item according to the solution selected by the operator (if it is unique). Drive a contact switch that triggers Thus, the user / consumer 2 can drink a beverage. The beverage is recorded in the memory 34 of the vending machine 3 and referenced by the control of the central system 5.

The vending machine 3 (immediately or offline) notifies the central system 5 of a transaction item (machine, product, price, etc.) or possibly abnormal.

The central server 5 records the transaction volume and associates the transaction volume with the identification number of the consumer 2. The central system 5 notifies the operator 6 of the consumer 2 of the transaction amount. In case of malfunction, the central system 5 is analyzed and processed. The central system 5 contacts the computer system of the operator 6 to carry over the consumption and possibly feed back updates (e.g. price changes) of consumption items, inventory management items, anomalies and vending machines. To the computer system of the vending machine 3.

The central system 5 may take into account the management of the consumer 2 for royalties, incentives and transportation purposes, both on the operator side and on the seller side.

The following describes the application of the method of the present invention to an example of accessing a parking lot.

The application of the method for parking lot access works on the same principle. The user 2 who wants to access the parking lot dials the control number displayed near the access barrier. The call is handled by the central system 5 to check the consumer's authority and its location (if the function is executed). After the location of the mobile phone and the access barrier match, the central system 5 retransmits the open command (via a link, a wireless phone or a wired link). The system 3 for controlling the access barrier checks whether the vehicle is actually in front of the access, for example by the presence of a loop of ground, and controls the opening of the barrier.

The access rights of the user 2 may be ownership (which is a customary user requiring access), or another user (eg, a visitor identified by his identification number: the identification number is limited to access the parking lot). (Recorded for a time) may be delegated (in this case, an authenticated person who is generally given access).

In case of malfunction, the central system 5 is analyzed and processed.

Finally, the central system 5 can be in contact with the charging system and can treat the user 2 with subsequent consumption and royalties as before.

In a public parking lot, for example, each user can provide access to a visitor for a half day. The visitor must make a reservation in advance by calling the operator 6 or sending a message specifying the desired 1/2 day and identification number. A message is then sent to the visitor specifically to inform the visitor of the number of reserved parking spaces. When the user arrives near the barrier and dials the control number, the user is identified by the central server by its identification number. Depending on its availability, access to the parking lot of the visitor is permitted in the customary user's space or a group of spaces reserved for the visitor.

Next, the application of the method according to the present invention to the parking fee payment example will be described in detail.

To benefit from the service, the driver 2 dials the control number initially displayed on the ticket machine terminal 3 when parking his vehicle. The central server 5 identifies the ticket machine 3 and checks the user's authority. And:

Enable the ticket machine 3 to urge the driver 2 to select a parking time. After the selection of time by the driver, the ticket machine edits the ticket that the driver places behind the windshield of his vehicle. The ticket machine 3 notifies the central server 5 of the price 2 the driver has to pay according to the selected parking time,

Alternatively, record the time at which parking starts in the central server's memory. When the parking time ends, the driver must dial the second control number, and the central server can record the time when parking ends. The central server includes a table that associates an identification number with a license number or a barcode attached to the vehicle. The driver must indicate to his vehicle that he owns a remote control payment service. The car park manager checks whether the parking is legitimate by a specific mobile phone communicating with a central server and by reading a barcode attached to the vehicle. The central system 5 controls and manages parking of the vehicle.

It will be apparent to those skilled in the art that the present invention allows embodiments in many different forms without departing from the claimed application of the invention. As a result, this embodiment is to be considered as illustrative, and the embodiment can be modified within the scope defined by the appended claims, and the invention should not be limited to the foregoing detailed description.

Claims (18)

A method for enabling a user (2) to use a radiotelephone terminal (1) as a remote control for an automatic device (3) providing one or more payment services, The user 2 dialing the control number using his terminal 1 to call from the user to the central server via the wireless telephone network; Following the step while the central server 5 cuts off without opening the line, identifying and storing the control number and identification number of the terminal 1 in the memory 53 of the central server 5. ; Identifying the device (3) from at least the control number; And Investigating and inspecting the rights of the user 2, If the user is authorized to use his terminal 1 to remotely control the device 3, Transmitting a command for the determined operation from the central server (5) to the device (3); And Performing the operation by the device (3). The method of claim 1, The control number is characterized in that it is verbally displayed by the first interface (31) of the device (3) to a user who wants to use his wireless terminal (1) as a remote control for the automatic device (3). The method of claim 1, The control number is displayed by a message recorded on the first interface 31 of the device 3 to a user who wants to use his wireless terminal 1 as a remote control for the automatic device 3. How to. The method according to any one of claims 1 to 3, The step for identifying the device 3 refers to the lookup table 52 between the control number and the type of device 3, each of which is explicitly identified by a control number, by the central server 5. ; And Extracting the type of the device (3) from a lookup table (52) from the control number received by the central server (5). The method according to any one of claims 1 to 3, The step of identifying the device 3 comprises the central server in order to know the geographical location of the user 2, ie the prescribed area covered by the user 2 and the surrounding base station where the device 3 is found. (5) asking the operator 6; After said step, referring by said central server a look-up table (52) between said control number, device (3) and the geographic location of the device (3), each of which is explicitly identified by the control number and geographical location; And Extracting the type of the device (3) from a lookup table (52) from the control number received by the central server (5). The method according to claim 4 or 5, The step of investigating and inspecting the authority of the user 2 comprises the user 2 authorized to use his wireless telephone terminal 1 as a remote control for an identification number, in particular one or more determined automatic devices 3. Referencing by the central server a list (51) of registered users, the number of registered users; And Comparing the list of registered users with the received identification and control number. The method of claim 6, If the user is not authorized to use his wireless telephone terminal 1 as a remote control for the device 3, the central server 5 establishes wireless telephone communication with the user 2 and gives the user the Characterized in that it is notified to use its radiotelephone terminal (1) as a remote control for the device (3). The method according to any one of claims 1 to 6, The step of sending, by the central server 5 to the device 3, a command for the determined action may be directed to the central server via a wireless telephone network or a wired network to instruct the device 3 to execute the action. Sending an execution command message to the device (3); And Receiving the execution command message by a wireless telephony module (32) of the device (3). The compound according to any one of claims 1 to 8, wherein The device (3) is characterized in that for executing the operation by the control module (33). The method of claim 9, If the device (3) proposes a single service, the execution of the operation by the device (3) consists of a device (3) providing the service to the user (2). The method of claim 9, If the device 3 proposes several services, different control numbers are associated with each service, and the execution of the operation by the device 3 reminds the service associated with the control number dialed by the user 2. Method comprising a device (3) for the user (2). The method of claim 9, If the device 3 proposes several services, a unique control number is associated with the device 3, and the execution of the operation by the device 3 is performed by the user of the device 3 to select a service. A device (3) for enabling a two-contact interface, said device (3) providing a service selected by said user (2). The method according to any one of claims 1 to 12, If the device 3 has provided the desired service to the user 2, after the step of executing an operation by the device 3, the device 3 is in the memory 34 of the device 3 by the device 3. Storing the provided service; And Billing for the service by the radiotelephone operator (6) via the central server (5) and the device (3). The method of claim 13, The charging step comprises a successful operation execution message including at least one identifier of the device 3, the service performed, the cost of the service and the time at which the service was provided, via its communication module 32. From the server to the central server. The method of claim 14, The successful action execution message is stored in the memory 53 of the central server 5 and associated with the identification number of the user 2 terminal 1 by the central server 5, and the central server 5. Sends an accounting message for the service to the user (2) to the operator (6), the accounting message comprising at least an identification number of the user (2) terminal and the price the user is to pay. The method of claim 15, The operator (6) stores the charging message in the server memory (61) of the operator (6). The method according to any one of claims 1 to 16, If the device 3 did not provide the desired service to the user 2, the device 3 uses its first interface 31 to notify the user 2 that an error has occurred and an error message. Is transmitted to the central server (5), wherein the error message comprises at least the identifier of the device, the desired service and the time at which the error occurred. The method of claim 17, The central server 5 stores the error message in its memory 53 and sends an information message to the user 2 via a wireless network to notify the user that an error has occurred. .