KR20100097329A - Device and control method for displaying operation information of arcade game machine - Google Patents

Abstract

PURPOSE: An operating information display device and a control method of the arcade game machine are provided to generate a game console ID in the initial connection with the arcade game machine respectively stored in the game console and display device. CONSTITUTION: A reading device communication unit(23) transmits personal information to an external reading device after security authentication of authenticated game information. An encryption unit(27) ciphers the game information of the arcade game machine(10). A control unit(21) performs the authentication process about the game approval. The controller transmits the amount information in the game console. The controller indicates the game information of the game console in the display unit(25).

Description

DEVICE AND CONTROL METHOD FOR DISPLAYING OPERATION INFORMATION OF ARCADE GAME MACHINE}

The present invention relates to an operation information display device of the arcade game machine and a control method thereof, and more specifically, to issue a game machine ID only to the first connected game machine, process game approval using the same, encrypt and store game operation information, and store the same. The data relates to an operation information display apparatus of an arcade game machine and a method of controlling the same so that encrypted data can be transmitted after mutual authentication to an external reading device to prevent manipulation and alteration of the arcade game machine operating information.

Arcade game machines are very diverse, including shooting games, sports games, and Go games, and are configured to allow users to enjoy the game at a set fee. Among such arcade game machines, the use of the game is greatly increased by installing a premium payment configuration that provides various prizes to users during the game in order to induce the interest of the gamers.

In other words, the configuration for paying prizes is provided inside or outside the game machine, and divided into several stages according to the score or the winning rate of the game to place prizes corresponding to each score or winning rate, and the score or winning rate corresponding to the prize providing while the user is playing the game. If this is achieved, use the way of giving prizes.

1 is an exemplary block diagram of an arcade game machine according to the prior art.

As shown, the arcade game machine according to the prior art comprises the money processing module 110, the prize processing module 120, the input and output control module 130, the game processing module 140, the display module 150 Include.

For example, when the user inputs a bill, a coin, or a game coin, the amount processing module 110 is configured to generate the amount data according to the corresponding amount and grant the game use right accordingly.

The prize processing module 120 is configured to store the prize and then discharge the prize according to the game result and provide it to the user.

The game processing module 140 is configured to process game data so that a user can enjoy a game. The game processing module 140 may be implemented in the form of a dedicated game board or a game PC configured to execute a game processing function on a general PC.

The display module 150 displays the game data visually and acoustically based on the game data processed by the game processing module 140.

The input / output control module 130 communicates with the money processing module 110, the prize processing module 120, the game processing module 140, and the display module 150, respectively, for example, the money processing module 110. Control the game data of the game processing module 140 based on the amount of data generated in the), and transmits the processed game data to the display module 150 to display it in the display module 150, the user's game According to the result, the prize processing module 120 controls to discharge the prize and provide it to the user. The input / output control module 130 may be implemented integrally with the game processing module 140, for example.

In addition, the money processing module 110, the prize processing module 120, the input and output control module 130, the game processing module 140, the display module 150 is implemented as a separate device, each module is wired The game machine may be configured in connection. In this case, each module is accommodated in a separate game machine case, so that it can be configured to look like an integrated game machine.

In the arcade game machine as described above, the use of a game machine having a prize providing function is widely spread.

However, due to the illegal modification or alteration of the game machine equipped with such a prize providing function, the meandering property is being strengthened, and problems such as reduced sales often occur.

That is, after passing through the deliberation of the game machine, problems such as a prize providing method, a prize providing probability, a change in game contents, illegal change of game machine hardware or software, and a decrease in game sales amount occur.

There is a growing need for a method that can improve problems such as illegal tampering or modification of game consoles and the elimination of sales amount.

Therefore, in recent years, the information has laid down the regulations on the operation information display device of the arcade game machine by stipulating 'the duty to display the promotion law on the game industry'.

To summarize the requirements of the rules for the operation information display device for arcade game machine, after one machine and the authentication (registration procedure), it can not be used in the other game machine, the pulse regulations for the amount of money information when coin input, Function to prevent input, pulse regulation of bill acceptor, communication regulation between game machine and operation information display device, game initialization key is a rule issued only once upon first connection between game machine and operation information display device, communication with game machine and operation information display device REQUEST & RESPONSE SYNCH structure, RESPONSE / Ack response must be made when receiving REQUEST, response timeout should be within 2 seconds (2,000ms) maximum, 3 times retransmission at FAIL response or TIMEOUT, 3 times In case of failure even after retransmission, all operations are stopped and an error message window is displayed. The error message window restricts the display regulations.

However, at present, the arcade game machine is not provided with an operating information marker device for an arcade game machine satisfying the above rules.

Accordingly, an object of the present invention is to provide the game approval process of the arcade game machine and the input amount and game operation information (use amount, winning score, It is to provide an operation information display device and control method of the arcade game machine to display, encrypt and store the accumulated score, etc.).

In addition, another object of the present invention, when the arcade game machine and the operation information display device is connected to the operation information display device and the control method of the arcade game machine to generate a game ID only when the first connection is authenticated so that it can not be used in other game devices It is to provide.

In addition, another object of the present invention, the operation information management device receives and encrypts the operation information of the game machine, and then stores and manages, by enabling authentication after reading through an external reading device, the game operation information of the arcade game device To provide an operation information display device and control method of the arcade game machine to prevent the forgery of the.

The object of the present invention,

In the operation information display device of the arcade game machine for preventing the forgery of the game information of the arcade game machine that receives the amount information from the coin recognizer, the banknote recognizer, and proceeds the game to control the prize discharge through the prize ejector,

It is connected to the arcade game machine, coin recognizer, banknote recognizer and prize ejector, and generates and manages a game machine ID only for the first connected arcade game machine, and when connected to the arcade game machine based on the corresponding game machine ID The game machine is authenticated, and the money is inputted from the coin recognizer and the bill recognizer to the authenticated arcade game machine, the game price information is transmitted to the arcade game machine to start the game, and the game information of the arcade game machine is received. It is achieved by providing an operation information display device of the arcade game machine, characterized in that configured to encrypt and store and display while displaying.

Operation information display device of the arcade game machine of the present invention,

A game machine communication unit for serial communication with the arcade game machine;

An I / O communication unit for communicating with the coin recognizer, the bill acceptor, and the prize ejector, respectively;

A timer for checking a game start and game end time of the arcade game machine;

An encryption unit for receiving the encrypted game information of the arcade game machine and storing the encrypted information;

A storage unit for storing information encrypted by the encryption unit;

A display unit for displaying the game information and the arcade game machine operation information;

It checks the connection state of the arcade game machine through the game machine communication unit and generates and transmits a game machine ID for authenticating the arcade game machine only at the first connection, and stores and manages the storage unit, and when the arcade game machine is connected to the stored game machine ID. Based on the authentication process of the arcade game machine, and transfers the amount information input from the coin recognizer and the bill acceptor to the arcade game machine, and receives the information on the game start, game end, multiplier, winning amount by the progress of the game displayed on the display In addition to the control unit is configured to include a control unit for controlling to encrypt through the encryption unit to store in the storage unit.

In the operation information display apparatus of the arcade game machine of the present invention, if the case separation detection means for detecting the case separation of the operation information display device and the case separation detection means detects the case separation and the program of the controller It characterized in that it further comprises a security unit for managing the security by deleting the.

In the operation information display device of the arcade game machine of the present invention, the encryption unit is composed of SAM, characterized in that configured to authenticate with the external reading device by VSAM authentication, not program authentication.

In the operation information display apparatus of the arcade game machine of the present invention, the control unit,

Receives encrypted information about the game start time, game end time, score, winning amount, bet amount, probability, and winning amount as game information, and stores and encrypts the information through the display unit. Characterized in that to display the time and the game end time.

In the operation information display device of the arcade game machine of the present invention, under the control of the control unit and the authentication of the external reading device through the reading device communication unit for transmitting the encrypted and stored game information of the arcade game machine to the external reading device further comprising: It is characterized by consisting of.

In addition, the control method of the arcade game machine operating information display device of the present invention,

When the power is turned on, checking the connection state with the peripheral circuit, loading the approval number, the serial number, and the game machine ID stored in the encryption unit, and displaying the approval number, the serial number, and the current time on the display unit;

A game machine ID generation process of generating and encrypting a game machine ID (InitKey) and storing the game machine ID (InitKey) in the game preparation process and then storing them in the arcade game machine and the display device, respectively;

The game preparation process, when the game machine ID is loaded, receiving a game machine ID periodically from an arcade game machine and authenticating the game machine ID by the game machine ID loaded from the encryption unit;

When the authentication is completed in the game machine authentication process, the money information transmission process of receiving the money information from the coin recognizer, banknote recognizer and transmits the money information to the arcade game machine;

A game information display process of receiving game information according to the game progress and displaying game information through a display unit and controlling a prize discharge when a game is played in the arcade game machine receiving the amount information;

 The game information storing process of encrypting and storing and managing the information of the corresponding game received from the arcade game machine is performed.

In the control method of the arcade game machine operating information display device of the present invention, the game machine authentication process,

A game machine ID receiving step of receiving a game machine ID approval request from the arcade game machine when the arcade game machine is connected;

An authentication step of comparing the game machine ID received from the arcade game machine with the game machine ID stored in the operation information display device, and authenticating, and transmitting authentication (ACK) information to the arcade game machine when authentication is performed;

It is characterized in that it is configured to periodically request the game machine ID to the arcade game machine every predetermined time during the game progress, and perform a periodic authentication step of performing the game machine ID receiving step and the approval step.

In the control method of the arcade game machine operating information display device of the present invention, if the game information is not received for a predetermined time, the game information display request, the game machine ID transmission, and receives the game machine ID from the arcade game machine Characterized in that the authentication process is made to further perform the game machine ID verification step of transmitting the acknowledgment (ACK) information.

In the control method of the arcade game machine operation information display device of the present invention, if there is no response to the request for the game machine ID transmission, the game machine ID transmission request for a predetermined number of times, and if the game machine ID is not received for a predetermined number of times, an error occurs on the display unit. In addition to displaying and storing error information, it is characterized in that it is made to repeat the game machine ID transmission request at regular intervals.

As described above, the operation information display device generates and encrypts the game machine ID only at the first connection with the arcade game machine, and stores them in the game machine and the display device so that the game progress is authenticated by the game machine ID. You cannot use it.

In addition, since the game information is displayed in real time through the display unit and is encrypted and stored in the encryption unit made of SAM, even if the internal memory information is hacked, there is no encryption key of the SAM encryption unit so that it cannot be decrypted or tampered with. do.

In addition, in the present invention, a reading device communication unit is provided, and when the reading device is connected to the reading device communication unit, since the game information data is securely transmitted to the reading device only by VSAM security authentication of the SAM encryption unit, external reading is performed. Forgery of game information by the device can be prevented.

Therefore, it is possible to provide an operation information display apparatus for an arcade game machine that satisfies the provisions for the display of the promotion law for the game industry.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram of the installation of the arcade game machine operating information display device according to the present invention. As shown therein, the operation information display device 20 is connected to the arcade game machine 10 by serial communication, and the operation information display device 20 includes a coin recognizer 40, a bill recognizer 50, and a prize ejector 60. ) Is connected by I / O communication, and the operation information display device 20 includes a read device communication unit for connecting the read device 30. That is, the reading device 30 is not always connected, but is to download and confirm game operation information encrypted and stored in the operation information display device 20 from the outside as necessary.

The operation information display device 20 connected to the arcade game machine 10 as described above is for preventing the forgery of game information of the arcade game machine 10, and is defined as an obligation of displaying the arcade game machine in the promotion law for the game industry. To satisfy the item.

To this end, the operation information display device 20 generates and manages a game machine ID only for the first connected arcade game machine 10, and stores the arcade game machine based on the game machine ID when the arcade game machine 10 is connected. (10) to authenticate the arcade game machine 10 receives the money information from the coin recognizer 40, the bill recognizer 50, and transmits the money information to the arcade game machine 10 to start the game And receiving the game information of the arcade game machine 10 and displaying it on a display unit installed in the operation information display device 20 to encrypt and store it.

3 is a detailed functional block diagram of the operation information display apparatus of the arcade game machine according to the present invention. As shown in the drawing, the operation information display device 20,

A game machine communication unit (22) for serial communication with the arcade game machine (10);

An I / O communication unit 24 for communicating with the coin recognizer 40, the bill recognizer 50, and the prize dispenser 60, respectively;

A timer 26 for checking a game start and game end time of the arcade game machine 10;

An encryption unit 27 for receiving and encrypting game information of the arcade game machine 10;

A storage unit 28 for storing information encrypted by the encryption unit 27;

A display unit 25 for displaying the game information and the arcade game machine operation information;

A reading device communication unit 23 for transmitting the encrypted game information of the arcade game machine 10 to the external reading device 30 after security authentication;

Check the connection state of the arcade game machine 10 through the game machine communication unit 22 and generates and transmits a game machine ID for authenticating the arcade game machine 10 only when initially connected, and stores it in the storage unit 28. When the arcade game machine 10 is connected, the arcade game machine 10 is authenticated based on the stored game machine ID, and the amount information input from the coin recognizer 40 and the bill recognizer 50 is stored in the arcade game machine 10. And receive information on the game start, game end, magnification, and winning amount by the game progress, display control on the display unit 25, and encrypt through the encryption unit 27 to the storage unit 28. A control unit 21 for controlling to store; It is provided with case separation detecting means for detecting hardware case separation of the operation information display device 20. When the case separation detection means detects the case separation, the buzzer sounds and the program of the control unit 21 is deleted to secure the security. It comprises a security unit 29 for managing.

The encryption unit 28 is configured as a SAM, characterized in that configured to authenticate with the external reading device 30 by VSAM authentication, not program authentication.

 The operation information display device 20,

Receives information about the game start time, game end time, use score, accumulated winning amount, bet amount, probability, and winning amount, and encrypts the information. It displays the time and the end time of the game. When the power is connected, the approval number of the arcade game, the serial number of the game machine and the current time are displayed, and the game information display and the deliberation information are displayed during the game operation.

The game machine communication unit 22 is made to perform RS232C standard serial communication, the money communication unit

The operation information display device 20 according to the present invention configured as described above is used to display and securely manage and store game information of the arcade game machine 10, and to be authenticated by the arcade game machine ID at power-on, When the game is started by transmitting the amount information, the game information is received and displayed on the display unit. When certain game information is collected, the game information is encrypted and stored and managed by the SAM encryption unit. After security authentication, the SAM encryption unit generates a decryption key to transmit data.

In order to prevent attempts to hack the memory by separating the case, the present invention includes a case separation detecting means, and includes a security unit 29 for deleting a program of the control unit (main CPU) when detecting case separation. By removing the case, it is possible to prevent the forgery of directly hacking the memory, and to prevent the operation information display device from being connected to other game machines.

4 is a control flowchart showing a method for controlling operation information display of an arcade game machine according to the present invention.

As shown in the drawing, the operation information display device 20,

When the power is turned on, it checks the connection state with the peripheral circuit, loads the approval number, serial number, and game machine ID stored in the encryption unit 27, and prepares the game to display the approval number, serial number, and current time on the display unit. Process (S10);

In the game preparation process (S10), if the game machine ID is not generated for the first game machine connection, the game machine ID generation process of generating and encrypting a game machine ID (InitKey) and storing them in the arcade game machine 10 and the display device 20, respectively. (S20);

When the game preparation process (S10) game machine ID is loaded, the game machine authentication process (S30) for receiving a game machine ID from the arcade game machine (10) periodically and authentication process by the game machine ID loaded from the encryption unit;

When the authentication is completed in the game machine authentication process (S30), the money information transmission process (S40) for receiving the money information from the coin recognizer 40, banknote recognizer 50 and transmits the money information to the arcade game machine (10);

When the game progresses in the arcade game machine 10 receiving the amount information, the game information display process of receiving game information according to the game progress and displaying game information through the display unit 25 and controlling the prize discharge (S50). )and;

 It performs a game information storage process (S60) for encrypting and storing and managing the information of the corresponding game received from the arcade game machine.

First, the game preparation process (S10), when the power is turned on, the control unit 21 checks and checks the connection state with the peripheral circuit, if the normal connection state, the review number in the SAM encryption unit 27 (arcade game review Number), serial number (serial number of the terminal) and game machine ID are loaded and copied into the memory in the control unit 21, the deliberation number and the serial number are displayed, and the current time is read from the timer unit and displayed on the display unit.

The game preparation process (S10) as described above, and waiting to receive the game machine ID from the arcade game machine (10). If the game machine ID is not received for a predetermined time, the game machine ID transmission is requested. If the game machine ID is normally received, the received game machine ID is authenticated. The authentication process compares the game machine ID loaded by the SAM encryption unit 27 with the received game machine ID, determines that the authentication is successful, and transmits a response (ACK) to the game approval request to the game machine.

On the other hand, when connected to the first game machine operating information display device 20 generates and encrypts the game machine ID (InitKey), and transmits to the game machine, if receiving a response signal that the game machine received normally, the encryption unit ( 27). After that, when the power is connected, the game machine is authenticated through the corresponding game machine ID to prevent connection with other game machines.

5 is a communication configuration diagram between the arcade game machine and the operation information display device according to the present invention.

When the operation information display device 20 is connected to the arcade game machine 10 and the power is turned on, when the arcade game machine 10 transmits the game machine ID to request the game machine ID approval, the operation information display device 20 receives the operation information display device 20. A game machine authentication step of comparing the authenticated game machine ID with the game machine ID loaded from the encryption unit, and authenticating and transmitting the acknowledgment (ACK) information to the arcade game machine;

After the authentication is completed, the amount of money information transfer to the arcade game machine, and the amount information transmission step of receiving a price information acknowledgment (ACK) from the arcade game machine;

When the game is started in the arcade game machine receiving the amount information, the game operation information is transmitted to the operation information display device, and the operation information display device receiving the game operation information transmits the game information reception confirmation (ACK) information to the arcade game machine. Receiving game information;

If the game information is not received for a predetermined time (for example, 3 minutes) in the game information receiving step, request game machine ID transmission, receive the game machine ID from the arcade game machine, and perform authentication process to transmit the acknowledgment (ACK) information. The game machine ID verification step is performed.

That is, the arcade game machine and the operation information display device are configured to communicate by sending and receiving a request and an acknowledgment, and the communication protocol adopts the RS232C standard serial communication method.

In addition, if game information is not received for a predetermined time, the game machine ID transmission request is requested. If the game machine ID is not received, a predetermined number of consecutive requests are added. If the game machine ID is not received, the game machine ID is transmitted for a predetermined time or more. If there is no or wrong game machine ID, the display unit displays an error and stores error information, and repeats the game machine ID transmission request at regular intervals.

As described above, the operation information display device 20 generates and encrypts the game machine ID only when the first connection with the arcade game machine 10 is performed, and stores them in the game machine and the display device so that the game progress is authenticated by the game machine ID. It will not be able to connect to other game consoles.

In addition, since the game information is stored by encrypting the encryption unit 27 made of SAM, even if the internal memory information is hacked, there is no encryption key of the SAM encryption unit, so that it cannot be decrypted or forged.

In addition, in the present invention, the reader communication unit 23 is provided, and when the reader 30 is connected to the reader communication unit 23, the reader (only by the VSAM security authentication of the SAM encryption unit 27) 30, the game information data is secured to be transmitted, so that forgery of the game information by the external reading device can be prevented.

1 is an exemplary block diagram of an arcade game machine according to the prior art.

Figure 2 is a schematic diagram of the installation of the arcade game machine operating information display device according to the present invention.

Figure 3 is a detailed functional block diagram of the operation information display device of the arcade game machine according to the present invention.

4 is a control flowchart showing a method for controlling operation information display of an arcade game machine according to the present invention;

5 is a communication configuration diagram between the arcade game machine and the operation information display device according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: arcade game machine 20: operation information display device

30: reading device 40: coin recognizer

50: bill recognizer 60: prize ejector

21: control unit 22: game machine communication unit

23: reader communication unit 24: I / O communication unit

25: display unit 26: timer unit

27: encryption unit 28: storage unit

29: Security Department

Claims (10)

In the operation information display device of the arcade game machine, A game machine communication unit 22 communicating with the arcade game machine 10; An I / O communication unit 24 for communicating with a coin recognizer, a bill recognizer, and a prize ejector; A reading device communication unit 23 for transmitting the encrypted and stored game information to an external reading device for security authentication; A timer 26 for checking a game start and a game end time of the arcade game machine; An encryption unit 27 for receiving and encrypting game information of the arcade game machine; A storage unit 28 for storing information encrypted by an encryption key of the encryption unit 27; A display unit 25 for displaying the game information and the arcade game machine operation information; Only when the arcade game machine 10 is initially connected, the game machine ID is generated and stored and managed in the game machine and the display device, and authentication of the game approval is performed based on the game machine ID, and the amount information is transmitted to the game machine. Operation information display device of the arcade game machine, characterized in that it comprises a control unit 21 for displaying the game information transmitted from the game machine on the display unit 25, the encryption processing through the encryption unit 27, the storage management . The method of claim 1, And a case separation detecting means for detecting hardware case separation of the operation information display device. When detecting that the case is separated by the case separation detecting means, the buzzer sounds and the program of the controller 21 is deleted to manage security. Operation information display device of the arcade game machine, characterized in that further comprises a security unit (29). The method of claim 1, wherein the encryption unit 28, A SAM encryption module, which is configured to be separated from the control unit and is configured to authenticate with the external reading device (30) by VSAM authentication instead of program authentication. The method of claim 1, wherein the control unit 21, When connecting the power supply arcade game approval number and game machine serial number and the current time, and during game operation display the game information and deliberation information on the display unit 25, As the game information, information about the game start time, game end time, use score, accumulated winning amount, bet amount, probability, and winning amount is received and encrypted, and the betting amount, use score, cumulative winning, Operation information display device of the arcade game machine, characterized in that configured to display the game start time and game end time. The method of claim 1, Further comprising a reading device communication unit 23 for transmitting the game information of the encrypted and stored arcade game machine to the external reading device 30 through the authentication of the external reading device 30 under the control of the control unit 21; Operation information display device of the arcade game machine, characterized in that configured. In the control method of the arcade game machine operating information display device for displaying and storing and managing the game information of the arcade game machine connected to the arcade game machine, coin recognizer, banknote recognizer, prize ejector, When the power is turned on, the game preparation process checks the connection status with the peripheral circuit, loads the authorization number, serial number, and game machine ID stored in the encryption unit, and displays the authorization number, serial number, and current time on the display unit (S10). )and; A game machine ID generation process (S20) for generating and encrypting a game machine ID (InitKey) and storing the game machine ID (InitKey) in the game preparation process (S10) when the game machine ID is not generated for the first time; The game preparation process (S10) a game machine authentication process (S30) for receiving a game machine ID periodically from the arcade game machine and authenticating the game machine ID loaded from the encryption unit when the game machine ID is loaded; When the authentication is completed in the game machine authentication process (S30), the amount information transmission step (S40) for receiving the amount information from the coin recognizer, banknote recognizer and transmits the amount information to the arcade game machine; When the game proceeds in the arcade game machine receiving the amount information, the game information display process (S50) for receiving the game information according to the game progress and displaying the game information through the display unit and the prize discharge control;  Control method of the arcade game machine operating information display device characterized in that for performing the game information storage process (S60) for encrypting and storing and managing the information of the game received from the arcade game machine. The method of claim 6, wherein the game machine ID generation process (S20), When the arcade game machine and the operation information display device connect for the first time, the game machine ID (InitKey) is generated, encrypted, and then transmitted to the arcade game machine. And recording on the encryption unit 27 as a control method. The method of claim 6, wherein the game machine authentication process (S30), A game machine ID receiving step of receiving a game machine ID approval request from the arcade game machine when the arcade game machine is connected; An authentication step of comparing the game machine ID received from the arcade game machine with the game machine ID stored in the operation information display device, and authenticating, and transmitting authentication (ACK) information to the arcade game machine when authentication is performed; A method of controlling an arcade game machine operating information display device, comprising: requesting a game machine ID to an arcade game machine periodically every predetermined time during a game, and performing a periodic authentication step of performing the game machine ID receiving step and the approval step. The method of claim 6, wherein the game information display process (S50), If the game information is not received for a predetermined time, the game machine ID request is requested, and the game machine ID verification step of receiving the game machine ID from the arcade game machine and performing authentication process to transmit the acknowledgment (ACK) information is further performed. Control method of the arcade game machine operation information display device. The method of claim 9, If there is no response to the request for the game machine ID transmission, the game machine ID transmission request is made a predetermined number of times. If the game machine ID is not received for a predetermined number of times, an error is displayed on the display unit and error information is stored at regular intervals. A control method of an arcade game machine operating information display device, characterized by repeating a game machine ID transmission request.

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