JP2008022453A - Wireless transmission device, wireless transmission / reception system, wireless transmission device control method, and program - Google Patents

Abstract

Information relating to a more appropriate effective transfer rate in a wireless communication network environment can be provided to a user.
A print server of a wireless LAN system sets an effective transfer rate from among a plurality of transfer rates, and based on a user input, a measurement condition of an effective transfer rate including an actual amount of information to be transmitted wirelessly. The effective speed measurement data having the set data size is transmitted to the router 20 wirelessly at the set execution transfer rate. The router 20 that has received the effective speed measurement data measures the reception time and transmits the measured reception time to the print server 30. The print server 30 calculates an effective transfer rate based on the received reception time and the size of the effective speed measurement data, and displays or prints out this effective transfer rate to the user. In this manner, the effective transfer rate is obtained and output using the transmission of the effective speed measurement data determined based on the data size to be actually transmitted.
[Selection] Figure 1

Description

  The present invention relates to a wireless transmission device, a wireless transmission / reception system, a wireless transmission device control method, and a program.

Conventionally, as a wireless transmission device, a device capable of setting a plurality of transfer rates has been proposed (see, for example, Patent Document 1). The device described in Patent Document 1 transmits a packet for testing a transmission rate to a wireless reception device, and sets a transfer rate smaller than the current transmission rate when a reception success signal (ACK signal) is not returned from the wireless reception device. . In a plurality of devices with different radio wave conditions, the effective transfer rate of each device is calculated by dividing the transfer rate set for each device by the number of devices, and the transfer rate of each device is made as close as possible. Set.
JP 2004-221710 A

  However, since the apparatus described in Patent Document 1 only transmits a packet for speed measurement at a set transfer rate and sets the transfer rate based on whether or not an ACK signal is returned, for example, When a relatively large amount of data (for example, several Mb) is transmitted by the user, it may be affected by radio wave interference from a fixed object such as a wall or radio wave interference from other wireless LAN systems. The rate is often an instantaneous value, and does not always represent the effective transfer rate of actual data transmission. In addition, since the theoretical effective transfer rate is obtained by calculation by dividing the transfer rate of each device by the number of devices, the transfer rate may be far from the transfer rate when actual data is transferred.

  The present invention has been made in view of such problems, and a wireless transmission device, a wireless reception device, and a method thereof that can provide a user with information regarding a more appropriate effective transfer rate in a wireless communication network environment. And to provide a program.

  The present invention adopts the following means in order to achieve the above-mentioned object.

The wireless transmission device of the present invention is
Wireless transmission means capable of wirelessly transmitting information to the wireless reception device;
An output means capable of outputting information;
Transfer rate setting means for setting an execution transfer rate used for executing information transmission among a plurality of transfer rates;
Condition setting means for setting an effective transfer rate measurement condition including an information amount condition of information for effective speed measurement determined based on an information amount transmitted and received by a user;
The effective speed measurement information is transmitted to the wireless reception device by the wireless transmission device under the execution transfer rate set by the transfer rate setting device and the measurement condition set by the condition setting device, and obtained based on the transmission result. Transmission output control means for causing the output means to output information relating to the effective transfer rate, and
It is equipped with.

  In this wireless transmission device, an effective transfer rate that includes an information amount condition of information for effective speed measurement that is set based on the amount of information that is transmitted and received by the user is set out of a plurality of transfer rates that is used to execute information transmission. Set speed measurement conditions, send effective speed measurement information to the wireless receiver with the set execution transfer rate and set measurement conditions, and output information about the effective transfer speed obtained based on the transmission result. . In this way, the information regarding the effective transfer rate obtained based on the transmission of the effective speed measurement information determined based on the amount of information to be actually transmitted is output. Therefore, it is possible to provide the user with information regarding a more appropriate effective transfer rate in a wireless communication network environment. Here, the “information about the effective transfer rate” is not only the effective transfer rate itself, but also information used for obtaining the effective transfer rate, for example, the amount of effective rate measurement information and the wireless receiver receives the information for measuring the effective rate. Includes reception time.

  In the wireless transmission device of the present invention, the condition setting means may set the measurement condition of the effective transfer rate based on a user input. In this way, since the effective transfer rate is measured under the effective transfer rate measurement condition input by the user, it is possible to provide information regarding the effective transfer rate in the wireless communication network environment desired by the user.

  In the wireless transmission device according to the present invention, the transfer rate setting means may be configured to measure the effective speed between the start of transmission of the effective speed measurement information to the wireless reception apparatus by the wireless transmission means and the end of transmission. The effective transfer rate may be set from the plurality of transfer rates based on a signal to be received from the wireless reception device after a part of the information is transmitted. In this way, since the effective transfer rate is switched based on the signal to be received from the wireless reception device while the effective speed measurement information is being transmitted, relatively stable information can be transmitted. At this time, when the transfer rate setting means sets the effective transfer rate based on the signal to be received from the radio receiving device, the transfer rate setting means outputs a reception success signal indicating that a part of the effective speed measurement information has been received. When it is not possible to receive from the wireless receiver, the effective transfer rate may be set to a transfer rate smaller than the current transfer rate. In this way, it is possible to reliably transmit information to the wireless reception device.

  In the wireless transmission device according to the present invention, the transfer rate setting means may have a transfer rate fixed to one of a plurality of transfer rates based on information relating to the effective transfer speed that the transmission output control means outputs to the output means. The transmission output control means is set to the subsequent effective transfer rate, and the transmission output control means transmits the transmission information designated by the user to the wireless transmission means at the effective transfer rate fixed and set by the transfer rate setting means. It is good also as what makes it transmit to. In this way, when the information is actually transmitted, the execution transfer rate is fixed based on the information about the effective transfer rate, thereby checking whether the execution transfer rate can be increased over the current transfer or wireless Since it is possible to suppress wasted time caused by changing the execution transfer rate such as lowering the transfer rate depending on the communication state, it is possible to obtain an appropriate effective transfer rate as a result. At this time, when setting the subsequent effective transfer rate based on the information regarding the effective transfer rate, the transfer rate setting means sets the longest transfer rate during transmission of the effective speed measurement information as the effective transfer rate. The rate may be set.

  In the wireless transmission device of the present invention, the output means may be a notification means capable of notifying a user of information relating to the effective transfer rate in a mode including at least one of image display, optical display, and sound. In this way, since the image, light and sound are used, the user can relatively easily recognize the information regarding the effective transfer rate.

  In the wireless transmission device of the present invention, the output means may output the information related to the effective transfer speed to the printing device in such a manner that the printing device that prints on the printing medium with the colorant can print. In this way, the information regarding the effective transfer rate is printed on the print medium, so that the user can easily confirm the information regarding the effective transfer rate.

  The wireless transmission device of the present invention may comprise information storage means capable of storing information, and the transmission output control means may store and output information relating to the obtained effective transfer rate to the information storage means. This makes it easier to use information about the effective transfer rate later. At this time, the information storage unit also stores a statistical value of the amount of transmission information transmitted by the user per time, and the condition setting unit stores the information amount of transmission information stored in the information storage unit. The information amount of the effective speed measurement information may be set based on the statistical value.

  The wireless transmission device of the present invention includes wired reception means connected to the wireless reception device by a wire and capable of receiving information from the wireless reception device, wherein the transmission output control means transfers the effective speed measurement information to the transfer device. Based on the result of transmitting and receiving the effective speed measurement information from the wireless reception device by causing the wireless transmission unit to transmit to the wireless reception device at the execution transfer rate set by the rate setting unit. The effective transfer rate may be obtained. By doing so, it is possible to obtain information related to effective transfer processing without performing special processing in the wireless reception device, so that the effective transfer rate can be simply measured by one device.

  The wireless transmission device of the present invention includes information reception means capable of receiving information from the wireless reception device, and the transmission output control means determines the effective transfer rate obtained by the wireless reception device as the effective transfer rate. The information receiving means may be made to receive information on speed. In this way, since the effective transfer rate is obtained by the wireless receiver, the processing can be distributed. Alternatively, the wireless transmission device of the present invention includes information reception means capable of receiving information from the wireless reception device, and the transmission output control means determines the reception time of the effective speed measurement information from the wireless reception device. The information receiving unit may receive information as an effective transfer rate, and the effective transfer rate may be obtained by dividing the information amount of the transmitted effective rate measurement information by the received reception time. In this way, the effective transfer rate is obtained by the wireless transmission device, and therefore the effective transfer rate can be obtained relatively reliably.

The wireless transmission / reception system of the present invention includes:
A wireless transmission device according to any of the above,
Wireless reception means capable of receiving information from the wireless transmission apparatus wirelessly, information transmission means capable of transmitting information to the wireless transmission apparatus, and information regarding effective speed measurement information transmitted by the wireless transmission apparatus A radio reception apparatus comprising: a reception control unit that causes the transmission apparatus to transmit the information transmission unit;
It is equipped with.

  In this wireless transmission / reception system, the wireless transmission device sets an effective transfer rate used for execution of information transmission among a plurality of transfer rates, and the amount of information of effective speed measurement information determined based on the amount of information transmitted / received by the user. The effective transfer rate measurement conditions including the conditions are set, the effective transfer rate information is transmitted to the wireless reception device with the set execution transfer rate and the set measurement conditions, and the wireless reception device transmits the effective transmission rate transmitted by the wireless transmission device. Information related to the speed measurement information is transmitted to the wireless transmission device, and the wireless transmission device outputs information related to the effective transfer rate obtained based on the transmission result. In this way, the information regarding the effective transfer rate obtained based on the transmission of the effective speed measurement information determined based on the amount of information to be actually transmitted is output. Therefore, it is possible to provide the user with information regarding a more appropriate effective transfer rate in a wireless communication network environment.

  In the wireless reception device of the present invention, the reception control unit measures a reception time of the effective speed measurement information transmitted by the wireless transmission device, and uses the measured reception time as information on the effective speed measurement information. It is good also as what makes an information transmission means transmit to the said wireless transmitter. In this way, the reception time of the information for measuring effective speed necessary for obtaining the effective transfer speed can be used by the wireless transmission device.

  In the wireless reception device of the present invention, the reception control unit measures a reception time of the effective speed measurement information transmitted by the wireless transmission device, and the information amount of the effective speed measurement information received by the wireless reception unit Is divided by the reception time to determine the effective transfer rate, and the determined effective transfer rate may be transmitted to the wireless transmission device as information related to the effective rate measurement information. In this way, since the wireless receiving apparatus performs the process of obtaining the effective transfer rate, the process can be distributed.

  Alternatively, the wireless reception device of the present invention includes a wireless reception unit capable of receiving information wirelessly from a wireless transmission device in a mode connected to the wireless reception device by wire, and the wireless transmission device connected to the wireless transmission device by wire. Wired transmission means capable of transmitting information to the wireless transmission device, and reception control means for causing the wired transmission means to transmit the effective speed measurement information received by the wireless reception means to the wireless transmission device. In this way, the effective speed measurement information transmitted wirelessly is transmitted directly to the wireless transmission device using a wired cable that has a relatively high transfer speed and is not easily affected by the surrounding environment. It is easy to find the effective transfer rate at the time.

The method for controlling the wireless transmission device of the present invention includes:
A wireless transmission device control method comprising wireless transmission means capable of wirelessly transmitting information to a wireless reception device,
(A) setting an effective transfer rate used to execute information transmission among a plurality of transfer rates;
(B) setting an effective transfer rate measurement condition including an information amount condition of effective speed measurement information determined based on an information amount transmitted and received by a user;
(C) causing the wireless transmission means to transmit effective speed measurement information to the wireless reception device under the execution transfer rate set in step (a) and the measurement conditions set in step (b);
(D) outputting information relating to the effective transfer rate obtained based on the result transmitted in step (c);
Is included.

  In this wireless transmission device control method, an effective transfer rate used to execute information transmission among a plurality of transfer rates is set, and an information amount condition of information for effective speed measurement determined based on the information amount transmitted and received by the user is set. Set the effective transfer rate measurement conditions, send the effective speed measurement information to the wireless receiver with the set execution transfer rate and the set measurement conditions, and information on the effective transfer rate obtained based on the transmission result Is output. In this way, the information regarding the effective transfer rate obtained based on the transmission of the effective speed measurement information determined based on the amount of information to be actually transmitted is output. Therefore, it is possible to provide the user with information regarding a more appropriate effective transfer rate in a wireless communication network environment. In this method for controlling the wireless transmission device, various aspects of the wireless transmission device described above may be adopted, and steps for realizing the functions of the wireless transmission device described above may be added. .

  The program of the present invention is for causing one or a plurality of computers to implement the steps of the above-described method for controlling the wireless transmission device. This program may be recorded on a computer-readable recording medium (for example, hard disk, ROM, FD, CD, DVD, etc.), or from a computer via a transmission medium (communication network such as the Internet or LAN). It may be distributed to another computer, or may be exchanged in any other form. If this program is executed by one computer or if each computer is assigned to each step and executed, each step of the above-described control method of the wireless transmission device is executed. An effect is obtained.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  Next, an embodiment embodying the present invention will be described. FIG. 1 is a configuration diagram showing an outline of a configuration of a wireless LAN system 10 according to an embodiment of the present invention. The print command print execution system 10 according to the present embodiment has a function as a wireless transmission device and a wireless reception device according to the present invention and has a function as a wireless transmission device and a wireless reception device according to the present invention. The print server 30 that communicates with the router 20 via the wireless LAN 72, the multi-function printer 50 that is connected to the print server 30 via a USB cable and prints received print data, and the router 20 is connected via the wireless LAN 72. And a user personal computer (hereinafter referred to as a user PC) 60. The router 20 and the print server 30 of the wireless LAN system 10 are connected to a communication standard IEEE802. According to g, data is transmitted at a predetermined execution transfer rate among a plurality of transfer rates (54 Mbps, 48 Mbps, 36 Mbps, etc.) in the ISM band of the 2.4 GHz band. In this print command print execution system 10, for convenience of explanation, it is assumed that one multi-function printer 50 and one user PC 60 are connected to the wireless LAN 72. The user PC 60 may be connected to the wireless LAN 72.

  The router 20 routes data transmitted from clients such as the multi-function printer 50 and the user PC 60 to a designated transmission destination according to a routing table in which a communication path is described, and a controller 21 that controls the entire apparatus. A wireless LAN board 27 connected to the wireless LAN 72 for data transmission / reception, a wired LAN board 28 for connecting a LAN cable to the LAN terminal 28a and transmitting / receiving data to / from an external device, and a user instruction can be input. A certain operation panel 29. The controller 21 is configured as a microprocessor centered on the CPU 22, and includes a ROM 23 that stores various processing programs, a RAM 24 that temporarily stores data and saves data, and a flash that can write and erase data. And a memory 25. The controller 21 is connected to a wireless LAN board 27, a wired LAN board 28, and an operation panel 29 via a bus 26. The ROM 23 stores a transfer rate measurement data transmission program and a transfer rate measurement data reception program which are application programs. The operation panel 29 is a device for a user to input various instructions to the router 20. When measuring the effective transfer rate of a device connected to the wireless LAN 72, the operation panel 29 is used to set the router 20 to the receiving side. The reception setting button 29a that is pressed when the button is pressed, the transmission setting button 29b that is pressed when setting on the transmission side, and when the measurement result is printed out, for example, by the multi-function printer 50 or when the data size of the effective speed measurement data is set. An output button 29c to be pressed is provided.

  The print server 30 is a device that transmits print data transmitted from a client such as the user PC 60 to the multi-function printer 50 or transmits scan data read by the scanner unit 52 of the multi-function printer 50 to the user PC 60. A USB controller 36 that inputs and outputs data between the controller 31 that controls the entire apparatus and an external device (for example, the multifunction printer 50) connected to the USB terminal 36a, and a wireless LAN 72 that transmits and receives data. A wireless LAN board 37 to be performed, a wired LAN board 38 for connecting a LAN cable to a LAN terminal 38a and transmitting / receiving data to / from an external device in a wired manner, and an operation panel 40 capable of inputting a user instruction. The controller 31 is configured as a microprocessor centered on the CPU 32, and includes a ROM 33 that stores various processing programs, a RAM 34 that temporarily stores data and stores data, and a flash that can write and erase data. And a memory 35. The controller 31 is connected to a wireless LAN board 37, a wired LAN board 38, and an operation panel 40 via a bus 39. The ROM 33 stores a transfer rate measurement data transmission program and a transfer rate measurement data reception program which are application programs. As shown in FIG. 2, the flash memory 35 stores measurement condition information 35a including conditions for measuring the effective transfer rate and transfer rate setting information 35b including the current setting contents. FIG. 2 is an explanatory diagram of an example of the measurement condition information 35a and the transfer speed setting information 35b stored in the flash memory 35. The measurement condition information 35a includes the transfer direction for measuring the effective transfer rate, the size of the effective speed measurement data that is transferred when the effective transfer rate is measured, and the transfer rate during the measurement of the effective transfer rate. And a transfer mode which is information on whether to change or fix. The transfer speed setting information 35b includes the transfer direction of each device connected to the wireless LAN 72, the execution transfer rate of each device, the effective transfer speed that is a measurement value corresponding to the transfer direction of each device, and the actual print. It includes a transfer mode that is information on whether to change or fix the execution transfer rate during transmission / reception of data during transmission / reception of data. As shown in FIG. 1, the operation panel 40 is a device for a user to input various instructions to the router 20, and includes a display panel 41 on which characters, figures, or symbols corresponding to the various instructions are displayed. The wireless lamp 42a that lights up during wireless communication, the LAN lamp 42b that lights up during communication with the LAN cable connected to the LAN terminal 38a, lights up in green when the status of the print server 30 is normal, and lights up in yellow when it is cautioned. A status lamp 42c that is lit in red when there is an abnormality, a USB lamp 42d that is lit during communication using a USB cable connected to the USB terminal 36a, and the like are provided. In addition, when the operation panel 40 measures the effective transfer rate of a device connected to the wireless LAN 72, the reception setting button 44a or the print server 30 that is pressed when setting the print server 30 to the reception side is set to the transmission side. A transmission setting button 44b that is pressed when setting, an output button 44c that is pressed when printing measurement results to the multifunction printer 50, or setting the data size of effective speed measurement data, and the like are provided. .

  The multi-function printer 50 includes a scanner unit 52 that reads an image recorded on a medium, a printer unit 54 that prints on the recording paper S using ink on the recording paper S, and a controller 56 that controls the entire apparatus. ing. The scanner unit 52 is a so-called flat bed type, and optically reads an image recorded on a medium placed on the upper surface of a glass surface by a line image sensor. The printer unit 54 employs an ink jet method in which a voltage is applied to a piezoelectric element in the print head to deform the piezoelectric element to pressurize the ink in the ink cartridge and eject the ink toward the recording paper S. The printer unit 54 may be an electrophotographic printing mechanism.

  The user PC 60 is a well-known general-purpose personal computer, and sends a file print command to the multi-function printer 50 via the wireless LAN 72 or receives a response from the multi-function printer 50 by a program installed in an HDD (not shown). . Also, a transfer speed measurement execution program for executing the transfer speed measurement data transmission program and the transfer speed measurement data reception program stored in the ROM 23 or ROM 33 described above from the user PC 60 is installed in the HDD (not shown). The user PC 60 includes a display 62 for displaying various information on a screen, an input device 64 such as a keyboard for a user to input various commands, and the like, and a user inputs a cursor displayed on the display 62 via the input device 64. When operated, it has a function of executing an operation corresponding to the input operation.

  Next, the operation of the wireless LAN system 10 of the present embodiment configured as described above, particularly the operation of measuring the effective transfer rate of wireless communication of the print server 30 will be described. FIG. 3 is an explanatory diagram illustrating an example of a transfer speed measurement condition setting screen 80 displayed on the display 62. FIG. 4 illustrates an example of an effective speed measurement data transmission routine executed by the CPU 32 of the print server 30. FIG. 5 is a flowchart showing an example of an effective speed measurement data reception routine executed by the CPU 22 of the router 20. First, the user operates the input device 64 of the user PC 60 to execute a transfer rate measurement execution program installed in the user PC 60. Then, the user PC 60 reads the transfer speed measurement condition setting screen 80 stored in the ROM 33 of the print server 30 from the ROM 33 and displays it on the display 62 as shown in FIG. Here, for convenience of explanation, as shown in FIG. 3, the transfer direction for measuring the effective transfer rate is set from the print server 30 to the router 20 (that is, the print server 30 is a wireless transmission device of the present invention and the router). 20 is the wireless receiver of the present invention, and the case where the effective transfer rate is measured by setting the transfer rate measurement data size to 3 Mb and the transfer mode to the fluctuation mode will be described.

  Here, the transfer rate measurement condition setting screen 80 will be described. In the upper part of the transfer speed measurement condition setting screen 80, a transfer direction setting field 82 for selecting a transfer direction to be measured, and a measurement data size setting field 83 for specifying the size of effective speed measurement data to be transferred to the receiving side device, It is possible to input effective transfer rate measurement conditions, such as a transfer mode setting field 84 in which a transfer mode can be selected and a measurement transfer rate setting field 85 in which an execution transfer rate to be fixed when the transfer mode is selected as a fixed mode. A column is provided. In the transfer direction setting column 82, the uplink and downlink directions can be selected by pull-down for each device connected to the wireless LAN 72 in advance. In the measurement data size setting column 83, a plurality of data sizes (for example, 1 Mb, 3 Mb, 5 Mb, 10 Mb, etc.) that the user is expected to execute data transfer can be selected from a pull-down menu. The transfer mode setting field 84 is a mode in which data is transmitted while changing the effective transfer rate to the fastest possible transfer rate, and a mode in which the effective transfer rate is fixed to a previously specified transfer rate and data is transmitted. A certain fixed mode can be selected. The measured transfer rate setting field 85 can be input only when the fixed mode is selected in the transfer mode setting field 84, and a predetermined transfer rate (for example, 54 Mbps, 48 Mbps, 36 Mbps, etc.) can be selected by pull-down. ing. The middle part of the transfer rate measurement condition setting screen 80 is used for actual data transfer including the execution transfer rate currently set in the print server 30, the measured effective transfer rate, the selected transfer mode, and the like. A setting display field 86 for displaying information such as setting contents to be set is provided. In the wireless LAN system 10, actual data transfer is performed with the contents displayed in the setting display field 86. In the setting display field 86, the variable mode and the fixed mode can be selected in actual data transfer as well as the variable mode and the fixed mode can be selected by measuring the effective transfer rate. ing. In the lower part of the transfer rate measurement condition setting screen 80, a message display field 87 for displaying a message to the user, a cancel button 88 to be pressed when canceling the selected content, and pressed to measure the effective transfer rate. A measurement execution button 89 and the like are arranged, and an instruction or the like can be input to the setting column described above by the cursor 81.

  Now, when the measurement execution button 89 is selected by the cursor 81 with the contents of the measurement conditions shown in FIG. 3 and pressed by the click operation of the input device 64, the figure is displayed based on the transfer direction set in the transfer direction setting field 82. 4 causes the CPU 32 of the print server 30 to execute the effective speed measurement data transmission routine stored in the ROM 33 shown in FIG. 4 and causes the CPU 22 of the router 20 to execute the effective speed measurement data reception routine stored in the ROM 23 shown in FIG. . The effective speed measurement data reception routine will be described later in detail. When this effective speed measurement data transmission routine is executed, the CPU 32 first executes a connection to the router 20 as a receiving device (step S100), and determines whether or not a connection has been established (step S110). Whether or not a connection has been established is determined based on whether or not a predetermined signal (for example, an ACK signal for handshake) has been received from the router 20. When it is determined that the connection has not been established, the CPU 32 waits as it is. When it is determined that the connection has been established, the CPU 32 reads the transfer speed measurement condition set on the transfer speed measurement condition setting screen 80 and performs effective transfer. Preparations for measuring the effective transfer rate, such as setting the execution transfer rate when measuring the speed, are made (step S120). Here, as preparation for measuring the effective transfer rate, the size of the effective speed measurement data is set to the size set in the measurement data size setting field 83, and the transfer mode is set to the mode set in the transfer mode setting field 84. The execution transfer rate is set to the current transfer rate stored in the RAM 34.

  Next, the CPU 32 transmits effective speed measurement data to the router 20 (step S130). Here, the effective speed measurement data does not need to include particularly meaningful data. For example, the effective speed measurement data may have a size set by using a plurality of data of a predetermined size. Here, the effective speed measurement data is transmitted for each packet of a predetermined capacity. Subsequently, the CPU 32 determines whether or not the ACK signal, which is a signal that has been successfully received, has been received from the router 20 (step S140). If the ACK signal cannot be received, the execution transfer rate is decreased (step S150). ), The process after step S130 is executed. Here, the effective transfer rate is reduced when the ACK signal cannot be received even if the same packet is transmitted three times. The decrease in the execution transfer rate is set to be lowered by two levels from the current execution transfer rate.

  On the other hand, when the ACK signal can be received, the CPU 32 determines whether or not a predetermined time (for example, several tens of seconds) has elapsed since the current execution transfer rate was set (step S160). When it is determined that the predetermined time has not elapsed since the current execution transfer rate was set, the CPU 32 determines whether or not all the effective speed measurement data has been transmitted (step S190), and the effective speed measurement data. Are determined not to be transmitted, the processing after step S130 is performed. On the other hand, when it is determined in step S160 that a predetermined time has elapsed since the current execution transfer rate was set, it is determined whether or not the set execution transfer rate is the maximum value (here, 54 Mbps) (step S160). S170) When it is determined that the execution transfer rate is not the maximum value, the execution transfer rate is increased (step S180), and the processes after step S130 are executed. The increase in the execution transfer rate is set to increase by one step from the current execution transfer rate. Here, when a predetermined time elapses after setting the current effective transfer rate, transmission is attempted by increasing the transfer rate on the assumption that the wireless environment may have been improved. As described above, the effective speed measurement data is continuously transmitted while changing the effective transfer rate based on whether or not the ACK signal has been received and the time after setting the effective transfer rate.

  After the execution transfer rate is determined to be the maximum value in step S170, or after it is determined in step S160 that a predetermined time has not elapsed since the current execution transfer rate was set, the effective speed measurement data Is transmitted to the router 20 (step S200).

  Subsequently, the CPU 32 determines whether or not the reception time of the effective speed measurement data measured by the router 20 has been received (step S210). When it is determined that the reception time has not been received, the CPU 32 stands by. On the other hand, when it is determined that the reception time has been received, the CPU 32 calculates the effective transfer rate based on the size of the effective speed measurement data and the reception time (step S220). Here, the effective transfer rate is obtained by dividing the size of the effective rate measurement data by the reception time. Then, the CPU 32 saves and outputs the calculated effective transfer rate in a predetermined area of the flash memory 35 (step S230), outputs the effective transfer rate (step S240), and ends this routine. Here, for the measured effective transfer rate, the value of the measured effective transfer rate is embedded in the effective transfer rate column of the setting display column 86 (see, for example, FIG. 7 described later), and the transfer rate measurement condition setting screen 80 in which this measured value is embedded. Is transmitted to the user PC 60 via the wireless LAN board 37, and the image on the transfer speed measurement condition setting screen 80 is converted into print data that can be printed by the multi-function printer 50, and the multi-function printer is connected via the USB controller 36. 50 was printed out. Then, the user PC 60 displays the received transfer speed measurement condition setting screen 80 image on the display 62. The multi-function printer 50 drives the printer unit 54 based on the input print data, and prints the image of the transfer speed measurement condition setting screen 80 on the recording paper S. The user confirms the result measured by the display 62 or the recording paper S.

  Next, an effective speed measurement data reception routine stored in the ROM 23 executed by the CPU 22 of the router 20 in parallel with the effective speed measurement data transmission routine will be described. This routine is stored in the ROM 23 and executed by the user PC 60 in response to an execution command for measuring the effective transfer rate. When this routine is executed, first, the CPU 22 of the router 20 prepares to receive transfer rate measurement data (step S300). Preparations for receiving transfer rate measurement data include, for example, clearing a predetermined area of the RAM 24 or not accepting connection requests from devices other than devices that measure the effective transfer rate. Next, the CPU 22 determines whether or not a connection request from the print server 30 has been received (step S310). If the connection request has not been received, the CPU 22 stands by, and if it is determined that a connection request has been received, the connection is established. Is transmitted to the print server 30 (step S320), and it is determined whether or not effective speed measurement data has been received (step S330). When it is determined that the effective speed measurement data has not been received, the CPU 22 waits as it is, and when it is determined that the effective speed measurement data has been received, the CPU 22 determines the reception time of the effective speed measurement data by a timer (not shown). Measurement is started (step S340).

  Next, the CPU 22 determines whether or not the effective speed measurement data has been successfully received (step S350). If the effective speed measurement data has been successfully received, the CPU 22 transmits an ACK signal to the print server 30 (step S350). S360). After transmitting the ACK signal to the print server 30 or after determining that the data could not be received in step S350, the CPU 22 sends a connection disconnection signal as a signal to which all of the effective speed measurement data has been transmitted. 30 (step S370). When the connection disconnection signal has not been received, the CPU 22 executes the processing after step S340. When it is determined that the connection disconnection signal has been received, the CPU 22 is effective. Assuming that all of the speed measurement data has been received, the measurement of the reception time of the effective speed measurement data is terminated, the measured reception time is transmitted to the print server 30 (step S380), and the connection is disconnected (step S390). This routine ends.

  Finally, each process performed in the user PC 60, the router 20, and the print server 30 and the state of communication will be described. FIG. 6 is an explanatory diagram sequentially showing each process and communication state of the wireless LAN system 10. The step numbers shown in FIG. 6 correspond to the step numbers of the routines shown in FIGS. When the measurement execution button 89 on the transfer speed measurement condition setting screen 80 is clicked on the user PC 60, the CPU of the user PC 60 sends the print server 30 to the transmission side based on the contents set on the transfer speed measurement condition setting screen 80. The measurement of the effective transfer rate is started with the router 20 as the receiving side. First, the CPU 22 of the receiving router 20 prepares for reception (step S300). On the other hand, when the CPU 32 of the print server 30 executes a connection to the router 20 (step S100) and receives a signal indicating that the connection has been established transmitted from the router 20 (step S320), it prepares to measure the effective transfer rate. (Step S120), and the effective speed measurement data determined based on the data size actually transferred by the user is wirelessly transmitted to the router 20 (step S130). The router 20 that has received the effective speed measurement data starts measuring the reception time (step S340), and transmits an ACK signal each time it receives a packet that is part of the effective speed measurement data (step S360). Here, the wireless communication devices such as the print server 30 and the router 20 change the ease of data transfer depending on the surrounding environment, for example, the operation of other devices that generate interference or electromagnetic waves due to other wireless LANs. To do. Therefore, the print server 30 performs a process of decreasing the effective transfer rate when the ACK signal from the router 20 cannot be received and increasing the effective transfer rate when a predetermined time has elapsed (steps S150 to S180). Subsequently, the print server 30 transmits the last data and transmits a signal to disconnect the connection to the router 20 (step S200). Receiving this signal, the router 20 finishes measuring the reception time of the effective speed measurement data (step S380), and transmits the measured reception time to the print server 30 (step S390). The print server 30 that has received the reception time obtains an effective transfer rate based on the data size of the effective speed measurement data and the reception time (step S220), and saves and outputs the obtained effective transfer rate (step S230). The effective transfer rate is output to the user PC 60 and the multifunction printer 50 (step S240). In this way, the effective transfer speed when the print server 30 wirelessly transmits data for measuring the effective speed according to the user's usage environment is measured, and the measured contents are output to the user.

  Here, the correspondence between the components of the present embodiment and the components of the present invention will be clarified. The wireless LAN system 10 of this embodiment corresponds to the wireless transmission / reception system of the present invention, the router 20 corresponds to a wireless reception device, the print server 30 corresponds to a wireless transmission device, and the multi-function printer 50 corresponds to a printing device. . In the print server 30 of the present embodiment, the wireless LAN board 37 corresponds to the wireless transmission means of the present invention, the flash memory 35 corresponds to the information storage means, the USB controller 36 and the wireless LAN board 37 correspond to the output means, The CPU 32 corresponds to transfer rate setting means, condition setting means, and transmission output control means. In the router 20 of this embodiment, the wireless LAN board 27 corresponds to a wireless reception unit and an information transmission unit, and the CPU 22 corresponds to a reception control unit. The ACK signal corresponds to a signal to be received from the wireless reception apparatus of the present invention, and the print data and scan data correspond to transmission information. In the present embodiment, an example of the method for controlling the wireless transmission device of the present invention is also clarified by describing the operation of the wireless LAN system 10.

  According to the wireless LAN system 10 of this embodiment described in detail above, the print server 30 sets an effective transfer rate from among a plurality of transfer rates, and measures the effective transfer rate including the data size transmitted and received by the user wirelessly. Conditions are set based on user input, and effective speed measurement data having the set data size is wirelessly transmitted to the router 20 at the set execution transfer rate. The router 20 that has received the effective speed measurement data measures the reception time and transmits the measured reception time to the print server 30. The print server 30 calculates an effective transfer rate based on the received reception time and the size of the effective speed measurement data, and displays or prints out the effective transfer rate to the user. In this manner, the effective transfer rate is obtained and output using the transmission of the effective speed measurement data determined based on the data size to be actually transmitted. Therefore, it is possible to provide the user with a more appropriate effective transfer rate in a network environment for wireless communication. In addition, since the effective speed is measured under the measurement condition of the effective transfer speed input by the user, the effective transfer speed desired by the user can be provided. Further, the router 20 measures the reception time of the effective speed measurement data transmitted by the print server 30 and transmits the measured reception time to the print server 30 as information related to the effective speed measurement data. The print server 30 can use the reception time of the effective speed measurement data necessary for obtaining the value. Furthermore, using the effective transfer rate, which is information regarding this network environment, to construct a network environment that achieves a more appropriate effective transfer rate, for example, by changing the position of the wireless transmission device or the wireless reception device. Can do. Also, compared to measuring the transfer speed indirectly using a separate measuring instrument that measures the radio wave condition, etc., to directly measure the transfer speed of the device actually used at that location Thus, it is possible to provide the user with an effective transfer rate that matches the actual situation.

  Whether or not an ACK signal is received after a packet that is a part of the effective speed measurement data is transmitted between the start of transmission of effective speed measurement data to the router 20 and the end of transmission. Since the effective transfer rate is set from a plurality of transfer rates based on the above, relatively stable data transmission can be performed. At this time, when the ACK signal cannot be received from the router 20, the effective transfer rate is set to a transfer rate smaller than the current transfer rate, so that the data can be reliably transmitted to the router 20. Furthermore, since the effective transfer speed is output to the multi-function printer 50 as the print data of the multi-function printer 50, the effective transfer speed is printed on the recording paper S, and the user can easily confirm information on the effective transfer speed. Furthermore, since the obtained effective transfer rate is stored and output to the flash memory 35, the effective transfer rate can be easily used later. The print server 30 receives the effective speed measurement data reception time from the router 20 and determines the effective transfer speed by dividing the data size of the effective speed measurement data by this reception time. Transfer speed can be obtained.

  It should be noted that the present invention is not limited to the above-described embodiment, and it goes without saying that the present invention can be implemented in various modes as long as it belongs to the technical scope of the present invention.

  For example, in the above-described embodiment, the print server 30 is a wireless transmission device and the router 20 is a wireless reception device. However, the print server 30 may be a wireless reception device and the router 20 may be a wireless transmission device. That is, the effective transfer rate may be measured by setting the transfer direction in the setting display field 86 in FIG. 3 from the router 20 to the print server 30. Alternatively, the user PC 60 may be a wireless reception device, the router 20 may be a wireless transmission device, the router 20 may be a wireless reception device, and the user PC 60 may be a wireless transmission device. Even in this case, since the effective transfer rate between the devices can be measured, a more appropriate effective transfer rate in the network environment of wireless communication can be provided to the user.

  In the embodiment described above, the router 20 measures the reception time, and the print server 30 calculates the effective transfer rate using this reception time. However, the router 20 measures the effective speed transmitted by the print server 30. The data transfer time is measured, the effective speed measurement data received by the wireless receiving means is divided by the reception time to determine the effective transfer speed, and the determined effective transfer speed is transmitted to the print server 30. It may be a thing. By doing so, the router 20 performs the process for obtaining the effective transfer rate, so that the process can be distributed.

  In the above-described embodiment, the effective transfer rate is obtained while changing the execution transfer rate in steps S130 to S190 of the effective speed measurement data transmission routine. However, as shown in FIG. This may be reflected in the execution transfer rate of the data transfer (data transfer other than when the effective transfer rate is measured). FIG. 7 is an explanatory diagram of an example in which the effective transfer rate is reflected on the execution transfer rate during normal data transfer. Specifically, the time when transmission was successful at each transfer rate set during measurement of the effective transfer rate is integrated, and the transfer rate set the longest is fixed to the subsequent execution transfer rate. Then, transmission data such as scan data designated by the user to be transmitted from the multi-function printer 50 to the user PC 60 is transmitted from the print server 30 to the router 20 at the fixed execution transfer rate, or the user transmits from the user PC 60 to the multi-function printer 50. Transmission data such as print data for which transmission is designated may be transmitted from the router 20 to the print server 30 at the fixed execution transfer rate. Depending on the state of the transfer rate, a process to check whether the effective transfer rate can be increased from the current transfer rate based on the reception of the ACK signal, that is, increase the transfer rate and send the same packet multiple times However, when the ACK signal cannot be received, there is a case where useless time is generated by the process of lowering the transfer rate, and the effective transfer rate may be lowered instead of changing the transfer rate. Here, since the useless time caused by changing the execution transfer rate while fixing the execution transfer rate is suppressed, an appropriate effective transfer rate can be obtained as a result. Whether or not the execution transfer rate is fixed is determined by empirically obtaining a threshold value at which a larger effective transfer rate is obtained when the execution transfer rate is fixed than when the execution transfer rate is changed. It is good also as what is used. When the execution transfer rate is fixed, as shown in FIG. 7, a message to that effect may be displayed in the message display field 87 to notify the user, or displayed on the display panel 41 to notify the user. It is good also as what to do.

  In the above-described embodiment, the case where the transfer mode is set as the fluctuation mode as the measurement condition of the transfer speed measurement condition setting screen 80, that is, the execution transfer rate is changed in steps S130 to S190 of the effective speed measurement data transmission routine has been described. However, as a measurement condition of the transfer speed measurement condition setting screen 80, the transfer mode may be set to a fixed mode, that is, steps S130 to S190 of the effective speed measurement data transmission routine may be omitted. Specifically, the effective transfer rate measurement data is transmitted while being fixed to the execution transfer rate input in the measured transfer rate setting field 85, and the effective transfer rate is obtained based on the reception time. In this way, the effective transfer rate at the execution transfer rate that the user desires to measure can be obtained. If the execution transfer rate is set so high that it cannot be measured in the current network environment, and the ACK signal cannot be received even after the predetermined measurement impossible time, a message that the effective transfer rate cannot be measured with the set execution transfer rate May be displayed on the display panel 41 or the display 62.

  In the above-described embodiment, the measured effective transfer rate is output to be displayed as an image as the transfer rate measurement condition setting screen 80. However, for example, characters may be displayed on the display panel 41 of the print server 30. Alternatively, the effective transfer rate may be displayed by the blinking speed of the wireless lamp 42a (or status lamp 42c). At this time, the flashing speed of the wireless lamp 42a may be set to increase as the effective transfer rate increases. Alternatively, the effective transfer rate may be displayed by the lighting color of the wireless lamp 42a. At this time, for example, red may be set when the effective transfer rate is low, and orange, yellow, green, and blue may be set as the rate increases. Alternatively, a speaker may be provided to notify the effective transfer rate by voice. In this way, since the image, light and sound are used, the user can relatively easily recognize the information regarding the effective transfer rate.

  In the above-described embodiment, data transmission / reception between the router 20 and the print server 30 is performed only wirelessly. However, as shown in FIG. 8, the LAN terminal 28a of the router 20 and the LAN terminal 38a of the print server 30 are used. Are connected to each other by a wired LAN cable, and effective speed measurement data is transmitted from the print server 30 to the router 20 via the wireless LAN board 37 and the wireless LAN board 27 at the set execution transfer rate, and from the router 20 to the LAN. The effective speed measurement data may be received by the print server 30 via the terminal 28a and the LAN terminal 38a, and information regarding the effective transfer speed may be obtained based on the result of transmission / reception. FIG. 8 is an explanatory diagram for measuring the effective transfer rate using the wireless LAN 72 and the wired LAN. At this time, the print server 30 as the transmission source measures the reception time for receiving the data for measuring the effective speed and calculates the effective transfer speed. In this way, the information regarding the effective transfer process can be obtained by the print server 30 without performing any special process in the router 20, so that the effective transfer rate can be simply measured by one apparatus. In addition, since the effective speed measurement data transmitted wirelessly is transmitted as it is to the print server 30 using a wired cable that has a relatively high transfer speed and is not easily affected by the surrounding environment, the data transmitted wirelessly is used. It is easy to find the effective transfer rate.

  In the above-described embodiment, the measurement of the effective transfer rate of the wireless LAN 72 communication is started by pressing the measurement execution button 89 on the transfer rate measurement condition setting screen 80 of the user PC 60. However, the effective transfer rate is measured by the user. It may be started without using the PC 60. Specifically, the data size of the effective speed measurement data is set by the number of times the output button 44c of the print server 30 is pressed, and the reception setting button 29a of the router 20 is pressed as an instruction to start the effective speed measurement data reception routine. After the effective speed measurement data reception routine is started and the router 20 is set in the reception standby state, the transmission setting button 44b of the print server 30 is pressed as an instruction to start the effective speed measurement data transmission routine, and the effective speed measurement data is pressed. The transmission routine is started, the processing shown in FIG. 6 is executed, and the measurement result is displayed and output on the display panel 41, or the measurement result is printed and output to the multi-function printer 50. Similarly, the data size of the effective speed measurement data is set by the number of times the output button 29c of the router 20 is pressed, and the reception setting button 44a of the print server 30 is pressed as an instruction to start the effective speed measurement data reception routine. After the effective speed measurement data reception routine is started and the print server 30 is set in the reception standby state, the effective speed measurement data transmission routine is pressed by pressing the transmission setting button 29b of the router 20 as a start command of the effective speed measurement data transmission routine. It is good also as what starts. In this way, the effective transfer rate of the wireless LAN 72 can be measured with a simple configuration that does not require the user PC 60.

  In the above-described embodiment, the print server 30 includes the display panel 41, the reception setting button 44a, the transmission setting button 44b, the output button 44c, and the like. However, as appropriate according to the measurement result notification method and the measurement start method. It may be omitted. The router 20 is also provided with the reception setting button 29a, the transmission setting button 29b, the output button 29c, and the like, but may be omitted as appropriate according to the measurement result notification method and the measurement start method. A display panel capable of displaying an image may be provided.

  In the above-described embodiment, the user inputs the data size of the effective speed measurement data in the setting of the effective transfer speed measurement condition. However, the CPU 32 of the print server 30 is transferred by the user other than the effective transfer speed measurement. Statistics of the data size per transmission, and the average data size at the time of data transfer is stored in the flash memory 35, and the value of the average data size is set as the effective speed measurement data size It is good. In this way, it is possible to measure the effective transfer rate that meets the actual conditions without paying attention to the data size that the user is normally transferring.

  In the above-described embodiment, the measurement condition information 35a and the transfer speed setting information 35b are stored in the flash memory 35 of the print server 30, but may be stored in the flash memory 25 of the router 20 or the user PC 60. It may be stored in an HDD (not shown).

  In the above-described embodiment, the measured effective transfer rate is stored and output to the flash memory 35, displayed and output to the display 62, and printed by the multi-function printer 50. However, these stored output, display output, and print output Of these, at least one or more may be appropriately selected and output.

  In the above-described embodiment, in step S160 of the effective speed measurement data transmission routine, whether or not to increase the transfer rate is determined based on whether or not a predetermined time has elapsed since the current transfer rate was set. However, whether or not to increase the transfer rate may be determined based on whether or not a predetermined number of packets have been transmitted for a predetermined time since the current transfer rate is set. It may be performed based on whether or not a predetermined data size has been transmitted since the setting.

  In the above-described embodiment, the wireless communication device of the wireless LAN system 10 is the router 20, the print server 30, and the user PC 60. However, the wireless communication device is not particularly limited as long as it is a device that communicates wirelessly (for example, a mobile phone). The present invention can be applied to.

1 is a configuration diagram showing an outline of the configuration of a wireless LAN system 10. FIG. It is explanatory drawing of an example of measurement condition information 35a and transfer rate setting information 35b. 6 is an explanatory diagram illustrating an example of a transfer speed measurement condition setting screen. FIG. It is a flowchart which shows an example of the data transmission routine for effective speed measurement. It is a flowchart which shows an example of the data reception routine for effective speed measurement. 2 is an explanatory diagram of each process and communication state of the wireless LAN system 10. FIG. It is explanatory drawing of an example which reflects an effective transfer rate on the execution transfer rate at the time of normal. It is explanatory drawing which measures an effective transfer rate with wireless LAN72 and wired LAN.

Explanation of symbols

  10 wireless LAN system, 20 router, 21 controller, 22 CPU, 23 ROM, 24 RAM, 25 flash memory, 26 bus, 27 wireless LAN board, 28 wired LAN board, 28a LAN terminal, 29 operation panel, 29a reception setting button, 29b transmission setting button, 29c output button, 30 print server, 31 controller, 32 CPU, 33 ROM, 34 RAM, 35 flash memory, 35a measurement condition information, 35b transfer speed setting information, 36 USB controller, 36a USB terminal, 37 wireless LAN board, 38 wired LAN board, 38a LAN terminal, 39 bus, 40 operation panel, 41 display panel, 42a wireless lamp, 42b LAN lamp, 42c status lamp, 42d U SB lamp, 44a Reception setting button, 44b Transmission setting button, 44c Output button, 50 Multi-function printer, 52 Scanner unit, 54 Printer unit, 56 Controller, 60 User PC, 62 Display, 64 input device, 70 Internet, 72 Wireless LAN 80 Transfer rate measurement condition setting screen 81 Cursor 82 Transfer direction setting field 83 Measurement data size setting field 84 Transfer mode setting field 85 Measurement transfer rate setting field 86 Setting display field 87 Message display field 88 Cancel Button, 89 Measurement execution button, S Recording paper.

Claims (11)

Wireless transmission means capable of wirelessly transmitting information to the wireless reception device;
An output means capable of outputting information;
Transfer rate setting means for setting an execution transfer rate used for executing information transmission among a plurality of transfer rates;
Condition setting means for setting an effective transfer rate measurement condition including an information amount condition of information for effective speed measurement determined based on an information amount transmitted and received by a user;
The effective speed measurement information is transmitted to the wireless reception device by the wireless transmission device under the execution transfer rate set by the transfer rate setting device and the measurement condition set by the condition setting device, and obtained based on the transmission result. Transmission output control means for causing the output means to output information relating to the effective transfer rate, and
A wireless transmission device comprising:   The wireless transmission device according to claim 1, wherein the condition setting unit sets a measurement condition of the effective transfer rate based on a user input. The transfer rate setting means transmits a part of the effective speed measurement information from the start of transmission of the effective speed measurement information to the wireless receiver by the wireless transmission means until the end of transmission. The effective transfer rate is set from the plurality of transfer rates based on a signal to be received from the wireless reception device later.
The wireless transmission device according to claim 1 or 2. The transfer rate setting means sets a transfer rate fixed to one of a plurality of transfer rates as the subsequent execution transfer rate based on information on the effective transfer rate that the transmission output control means outputs to the output means. And
The transmission output control means causes the wireless transmission means to transmit the transmission information designated by the user to the wireless reception device at an execution transfer rate fixed and set by the transfer rate setting means.
The wireless transmission device according to claim 1. The output means is a notification means capable of notifying a user of information on the effective transfer rate in a mode including at least one of image display, light display, and sound.
The wireless transmission device according to claim 1. The output means outputs information on the effective transfer speed to the printing apparatus in a manner in which the printing apparatus that prints on the print medium with the colorant can print;
The wireless transmission device according to claim 1. The wireless transmission device according to any one of claims 1 to 6,
An information storage means capable of storing information,
The transmission output control means saves and outputs information relating to the obtained effective transfer rate to the information storage means,
Wireless transmission device. The wireless transmission device according to claim 1,
Wired receiving means connected to the wireless receiving device by wire and capable of receiving information from the wireless receiving device,
The transmission output control means causes the wireless transmission means to transmit the effective speed measurement information to the wireless reception apparatus at an execution transfer rate set by the transfer rate setting means, and causes the wired reception means to transmit from the wireless reception apparatus. Receiving the effective speed measurement information and obtaining the effective transfer speed based on the transmission / reception results;
Wireless transmission device. A wireless transmission device according to any one of claims 1 to 8,
Wireless reception means capable of receiving information from the wireless transmission apparatus wirelessly, information transmission means capable of transmitting information to the wireless transmission apparatus, and information regarding effective speed measurement information transmitted by the wireless transmission apparatus A radio reception apparatus comprising: a reception control unit that causes the transmission apparatus to transmit the information transmission unit;
Wireless transmission / reception system. A wireless transmission device control method comprising wireless transmission means capable of wirelessly transmitting information to a wireless reception device,
(A) setting an effective transfer rate used to execute information transmission among a plurality of transfer rates;
(B) setting an effective transfer rate measurement condition including an information amount condition of effective speed measurement information determined based on an information amount transmitted and received by a user;
(C) causing the wireless transmission means to transmit effective speed measurement information to the wireless reception device under the execution transfer rate set in step (a) and the measurement conditions set in step (b);
(D) outputting information relating to the effective transfer rate obtained based on the result transmitted in step (c);
A method for controlling a wireless transmission device including:   The program for making one or more computers perform each step of the control method of the wireless transmitter of Claim 10.

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