JP2007053629A - Device and method for short-distance radio communication and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more quickly and surely transmit data according to the receiving environment of a short range radio communication device of a partner. <P>SOLUTION: This device is a short range radio communication device. The device includes an environment setting information storage for storing transmission environment information for setting a transmission environment of short range radio communication, corresponding to receiving environment information indicative of a receiving environment of the short range radio communication; a receiving environment acquisition for acquiring receiving environment information indicative of a receiving environment of the short range radio communication in the short range radio communication device of the partner, by the short range radio communication from the short range radio communication device of the partner; a transmission environment setter for reading transmission environment information corresponding to the receiving environment information acquired by the receiving environment acquisition, from the environment setting information storage, and setting a transmission environment of the short range radio communication on the basis of the read-out transmission environment information; and a data transmitter for transmitting the data to the short range radio communication device of the partner, in the transmission environment set by the transmission environment setter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a short-range wireless communication device, a short-range wireless communication method, and a program. In particular, the present invention relates to a short-range wireless communication device, a short-range wireless communication method, and a program that take into account the reception environment of the counterpart Kinki range wireless communication device.

  Conventionally, as near field communication, infrared communication using infrared rays, Bluetooth using radio waves, and the like are known. In this short-range wireless communication, a theoretical value of communication speed is set as the maximum value of the data amount that can be transmitted / received per second. However, the time required for transmission processing such as the packet generation of the short-range wireless communication device on the transmission side, the upper limit of the data size that can be received by the short-range wireless communication device on the reception side, and the data after reception are stored. The actual communication speed is slower than the theoretical value of the communication speed due to the time required for the reception processing.

Therefore, there is a technique for reducing the theoretical value of the communication speed when the number of packets (sometimes referred to as packet lost, packet loss, lost frames, etc.) that could not be received normally during data transmission is large (for example, patent literature) 1).
JP 2000-101605 A

  However, in the technique disclosed in Patent Document 1, it is determined whether or not the theoretical value of the communication speed is changed during the actual transmission / reception of data. Therefore, it takes time to make the determination, and the time until completion of transmission of the entire content data may become longer. In addition, when communication is originally started at a theoretical value of a slower communication speed, the communication speed is low even if the short-range wireless communication terminal device on the receiving side can receive at a higher communication speed. There is a problem that it remains.

  In order to solve the above-described problem, in the first embodiment of the present invention, a short-range wireless communication device is provided which is associated with reception environment information indicating a reception environment of short-range wireless communication, and the short-range wireless communication An environment setting information storage unit for storing transmission environment information for setting the transmission environment of the mobile station, and reception environment information indicating the reception environment of the short-range wireless communication in the partner's short-range wireless communication device. From the environment setting information storage unit that reads the transmission environment information associated with the reception environment information acquired by the reception environment acquisition unit and the reception environment information acquired by the reception environment acquisition unit based on the read transmission environment information A transmission environment setting unit for setting a transmission environment for short-range wireless communication, and a data transmission for transmitting data to the partner's short-range wireless communication device in the transmission environment set by the transmission environment setting unit Provided with a door. Thereby, according to the reception environment of the other party's short-range radio | wireless communication apparatus, data can be transmitted more quickly and reliably.

  In the short-range wireless communication device, the environment setting information storage unit stores processing speed information indicating the processing speed of data after the data is received in the short-range wireless communication device as reception environment information. May acquire the processing speed information in the other party's near field communication device from the other party's near field communication device by near field communication. Thereby, according to the processing speed of the other party's near field communication apparatus, data can be transmitted more quickly and reliably.

  In the short-range wireless communication device, the environment setting storage unit stores information indicating a smaller packet size as transmission environment information as the processing speed indicated by the processing speed information is slower. The transmission environment setting unit acquires the reception environment. The packet size associated with the processing speed information acquired by the transmission unit is read from the environment setting information storage unit and notified to the data transmission unit. The data transmission unit transmits the packet with the packet size notified by the transmission environment setting unit. The power data may be separated and transmitted to the other party's short-range wireless communication device. As a result, when the processing speed of the other party's short-range wireless communication device is low, certainty is emphasized, and when the processing speed is high, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating the slower communication speed as the transmission environment information as the processing speed indicated by the processing speed information is lower. The communication speed associated with the processing speed information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit, and the data transmission unit communicates with the partner at the communication speed notified by the transmission environment setting unit. Data may be transmitted to the short-range wireless communication device. As a result, when the processing speed of the other party's short-range wireless communication device is low, certainty is emphasized, and when the processing speed is high, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores round-trip time information indicating a time for data to reciprocate between the short-range wireless communication devices as reception environment information. Get a round-trip time information by sending a reply request requesting a reply to the short-range wireless communication device and measuring the time from when the reply request is sent until the reply is received from the partner's short-range wireless communication device May be. Thereby, according to the distance with the other party's short-range radio | wireless communication apparatus, data can be transmitted more quickly and reliably.

  In the short-range wireless communication apparatus, the environment setting information storage unit stores information indicating a smaller packet size as transmission environment information as the round trip time indicated by the round trip time information is longer. The packet size associated with the round trip time information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit. The data transmission unit transmits the packet size notified by the transmission environment setting unit. The data to be processed may be separated and transmitted to the other party's short-range wireless communication device. As a result, when the distance to the other party's short-range wireless communication device is long, the reliability is emphasized, and when the distance is short, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating the slower communication speed as transmission environment information as the round trip time indicated by the round trip time information is longer. The communication speed associated with the round-trip time information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit, and the data transmission unit communicates with the partner at the communication rate notified by the transmission environment setting unit. Data may be transmitted to the short-range wireless communication device. As a result, when the distance to the other party's short-range wireless communication device is long, the reliability is emphasized, and when the distance is short, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating a larger transmission intensity as transmission environment information as the round trip time indicated by the round trip time information is longer. The transmission strength associated with the round-trip time information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit. The data transmission unit uses the transmission intensity notified by the transmission environment setting unit, Data may be transmitted to the short-range wireless communication device. As a result, when the distance to the other party's short-range wireless communication apparatus is long, the reliability is emphasized, and when the distance is short, transmission can be performed with reduced output.

  In the short-range wireless communication device, the environment setting information storage unit stores reception strength information indicating reception strength in the short-range wireless communication device as reception environment information, and the reception environment acquisition unit stores the other party's short-range wireless communication. A reply request for requesting a reply including reception intensity information may be transmitted to the apparatus, and the reception intensity information included in the reply from the other party's short-range wireless communication apparatus may be acquired. Thereby, according to the receiving strength of the other party's short-range radio | wireless communication apparatus, data can be transmitted more quickly and reliably.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating a smaller packet size as the transmission environment information as the reception strength indicated by the reception strength information is smaller. The data is read from the packet size environment setting information storage unit associated with the reception strength information acquired by the acquisition unit and notified to the data transmission unit, and the data transmission unit transmits at the packet size notified by the transmission environment setting unit. The power data may be separated and transmitted to the other party's short-range wireless communication device. As a result, when the reception strength of the other party's short-range wireless communication device is low, certainty is emphasized, and when the reception strength is high, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating the slower communication speed as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller. The communication speed associated with the reception intensity information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit, and the data transmission unit communicates with the partner at the communication rate notified by the transmission environment setting unit. Data may be transmitted to the short-range wireless communication device. As a result, when the reception strength of the other party's short-range wireless communication device is low, certainty is emphasized, and when the reception strength is high, data can be transmitted earlier.

  In the short-range wireless communication device, the environment setting information storage unit stores information indicating a larger transmission strength as the transmission environment information as the reception strength indicated by the reception strength information is smaller. The transmission strength associated with the reception strength information acquired by the acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit. The data transmission unit transmits the transmission strength notified by the transmission environment setting unit to the other party. Data may be transmitted to the short-range wireless communication device. As a result, when the reception strength of the other party's short-range wireless communication device is small, certainty is emphasized, and when the reception strength is high, transmission can be performed with reduced output.

  In the short-range wireless communication device, the environment setting information storage unit stores, as transmission environment information, information indicating a smaller packet size as the reception environment information reception environment is worse. The packet size associated with the reception environment information acquired by the reception environment acquisition unit is read from the environment setting information storage unit and notified to the data transmission unit, and the data communication unit is configured to transmit the transmission environment setting unit. The data to be transmitted may be separated by the packet size notified by the above and transmitted to the other party's short-range wireless communication device. Thereby, when the reception environment of the other party's short-range wireless communication device is bad, the certainty is emphasized, and when the reception environment is good, data can be transmitted earlier.

  In the second aspect of the present invention, a short-range wireless communication method is a transmission that sets a transmission environment of the short-range wireless communication in association with reception environment information indicating a reception environment of the short-range wireless communication. Environment information is stored in the environment setting information storage unit, and reception environment information indicating the reception environment of short-range wireless communication in the partner's short-range wireless communication device is acquired from the partner's short-range wireless communication device by short-range wireless communication. The transmission environment information associated with the acquired reception environment information is read from the environment setting information storage unit, the transmission environment of the short-range wireless communication is set based on the read transmission environment information, and the set transmission environment Data is transmitted to the other party's near field communication device. Thereby, the effect similar to the 1st form can be acquired.

  In the third embodiment of the present invention, a program for controlling a short-range wireless communication device, the short-range wireless communication device is associated with reception environment information indicating a reception environment of short-range wireless communication, and the short-range wireless communication device Environment setting information storage function for storing transmission environment information for setting the transmission environment of wireless communication, reception environment information indicating the reception environment of short-range wireless communication in the partner's short-range wireless communication device, and the partner's short-range wireless communication The reception environment acquisition function acquired by the short-range wireless communication from the device, the transmission environment information associated with the reception environment information acquired by the reception environment acquisition function is read from the environment setting information storage function, and based on the read transmission environment information The transmission environment setting function for setting the transmission environment for short-range wireless communication and the transmission environment set by the transmission environment setting function for the short-range wireless communication device of the other party To realize the data transmission function of transmitting over data. Thereby, the effect similar to the 1st form can be acquired.

  In the above program, the environment setting information storage function stores processing speed information indicating the processing speed of data after receiving data in the short-range wireless communication device as reception environment information. The processing speed information in the short-range wireless communication device may be acquired from the partner's short-range wireless communication device by short-range wireless communication.

  In the above program, the environment setting information storage function stores information indicating a smaller packet size as transmission environment information as the processing speed indicated by the processing speed information is slower. The transmission environment setting function is acquired by the reception environment acquisition function. The packet size associated with the processed processing speed information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function transmits the data to be transmitted with the packet size notified by the transmission environment setting function. It may be separated and transmitted to the other party's short-range wireless communication device.

  In the above program, the environment setting information storage function stores information indicating the slower communication speed as the transmission environment information as the processing speed indicated by the processing speed information is slower. The transmission environment setting function is acquired by the reception environment acquisition function. The communication speed associated with the processed processing speed information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function is the communication speed notified by the transmission environment setting function, and the other party's short-range wireless communication Data may be transmitted to the communication device.

  In the above program, the environment setting information storage function stores round-trip time information indicating the time for data to travel back and forth between the short-range wireless communication devices as reception environment information. Round-trip time information may be acquired by sending a reply request requesting a reply to the device and measuring the time from when the reply request is sent until the reply is received from the partner's near field communication device .

  In the above program, the environment setting information storage function stores information indicating a smaller packet size as transmission environment information as the round trip time indicated by the round trip time information is longer. The transmission environment setting function is acquired by the reception environment acquisition function. The packet size associated with the round-trip time information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function sends the data to be transmitted with the packet size notified by the transmission environment setting function. It may be separated and transmitted to the other party's short-range wireless communication device.

  In the above program, the environment setting information storage function stores information indicating the slower communication speed as transmission environment information as the round trip time indicated by the round trip time information is longer. The transmission environment setting function is acquired by the reception environment acquisition function. The communication speed associated with the round-trip time information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function is the communication speed notified by the transmission environment setting function, and the other party's short-range wireless communication Data may be transmitted to the communication device.

  In the above program, the environment setting storage function stores information indicating a larger transmission intensity as transmission environment information as the round trip time indicated by the round trip time information is longer. The transmission environment setting function is acquired by the reception environment acquisition function. The transmission strength associated with the round-trip time information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function uses the transmission strength notified by the transmission environment setting function, and the near field communication of the other party. Data may be sent to the device.

  In the above program, the environment setting information storage function stores reception strength information indicating the reception strength at the short-range wireless communication device as reception environment information, and the reception environment acquisition function receives the reception strength at the partner short-range wireless communication device. A reply request for requesting a reply including information may be transmitted to obtain reception intensity information included in a reply from the other party's short-range wireless communication device.

  In the above program, the environment setting information storage function stores information indicating the smaller packet size as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller. The transmission environment setting function is acquired by the reception environment acquisition function. Is read from the packet size environment setting information storage function associated with the received reception strength information and notified to the data transmission function. The data transmission function separates data to be transmitted by the packet size notified by the transmission environment setting function. Then, it may be transmitted to the other party's short-range wireless communication device.

  In the above program, the environment setting information storage function stores information indicating the slower communication speed as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller. The transmission environment setting function is acquired by the reception environment acquisition function. The communication speed associated with the received reception strength information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function is the communication speed notified by the transmission environment setting function, and the other party's short-range wireless communication Data may be transmitted to the communication device.

  In the above program, the environment setting information storage function stores, as the transmission environment information, information indicating a larger transmission intensity as the reception intensity indicated by the reception intensity information is smaller. The transmission environment setting function is acquired by the reception environment acquisition function. The transmission strength associated with the received reception strength information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function is the transmission strength notified by the transmission environment setting function, and the other party's short-range wireless communication Data may be transmitted to the communication device.

  In the above program, the environment setting information storage function stores information indicating a smaller packet size as transmission environment information as the reception environment information reception environment is worse. The transmission environment setting function is acquired by the reception environment acquisition function. The packet size associated with the received reception environment information is read from the environment setting information storage function and notified to the data transmission function. The data transmission function transmits the data to be transmitted with the packet size notified by the transmission environment setting function. It may be separated and transmitted to the other party's short-range wireless communication device.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  As is apparent from the above description, according to the present invention, data can be transmitted more quickly and reliably according to the reception environment of the counterpart infrared communication device.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for the solution of the invention.

  FIG. 1 is a schematic diagram of a content transmission / reception system 10 to which an embodiment of the present invention can be applied. The content transmission / reception system 10 stores content data such as music data in the receiving communication device 200 via the mobile phone 100 and manages the usage status of the content by the management server 400.

  A content transmission / reception system 10 shown in FIG. 1 communicates via a content server 300 that stores and provides content data, a management server 400 that manages content usage, and the content server 300 and the management server 400 via a network 500. Mobile phone 100, and a receiving-side communication device 200 that performs infrared communication with the mobile phone 100. Here, the mobile phone 100 and the receiving-side communication device 200 are examples of short-range wireless communication devices. FIG. 1 shows a microwave oven with an infrared communication function as the receiving-side communication device 200. The short-range wireless communication device is not limited to this, and may be any communication device such as a PDA or PHS, or a home appliance such as a washing machine or a refrigerator, as long as short-range wireless communication can be performed. The short-range wireless communication is not limited to infrared communication, and may be radio wave communication such as Bluetooth. Hereinafter, short-range wireless communication refers to communication that allows each other's communication devices to communicate within a range of several meters.

  In the above configuration, the mobile phone 100 accesses the content server 300 via the network 500 and downloads and holds content data such as music data. Furthermore, the mobile phone 100 transfers the content data to the receiving communication device 200 by infrared communication. When the transfer to the reception-side communication device 200 is normally completed, the mobile phone 100 transmits to the management server 400 via the network 500 that the content has been transferred to the reception-side communication device 200. Accordingly, fee calculation and copyright management can be performed in the management server 400. Further, the receiving-side communication device 200 temporarily stores the received content data and reproduces it at a predetermined timing. For example, when cooking is completed in the receiving-side communication device 200, the music data received from the mobile phone 100 is reproduced in order to notify the user to that effect.

  FIG. 2 is a functional block diagram illustrating functions of the mobile phone 100 according to the present embodiment. The mobile phone 100 shown in FIG. 2 is acquired from the environment setting information storage unit 102 that stores the communication environment, the reception environment acquisition unit 104 that acquires the reception environment from the reception-side communication device 200, and the reception environment acquisition unit 104. A transmission environment setting unit 106 that sets a transmission environment by referring to the environment setting information storage unit 102 based on the reception environment. The mobile phone 100 further includes a content data acquisition unit 110 that acquires content data from the content server 300 via the network 500, a content data storage unit 112 that stores content data acquired by the content data acquisition unit 110, and a content data storage The data transmission unit 108 that transmits the content data stored in the unit 112 to the reception-side communication device 200, and the fact that the data transmission unit 108 has transmitted the content to the reception-side communication device 200 is sent to the management server 400 via the network 500. And a content transmission report unit 114 for notification. In order to simplify the description, illustration and description of the telephone function in the mobile phone 100 are omitted.

  The environment setting information storage unit 102 stores transmission environment information for setting an environment for transmission of infrared communication in association with reception environment information indicating an environment for reception of infrared communication. An example of the reception environment information is processing speed information indicating the processing speed of data after the receiving side communication apparatus 200 receives the data. An example of the transmission environment information is *** packet size. The environment setting information storage unit 102 will be further described with reference to FIG.

  The reception environment acquisition unit 104 acquires reception environment information indicating the reception environment of infrared communication in the reception side communication device 200 from the reception side communication device 200 by infrared communication. For example, the reception environment acquisition unit 104 transmits a reply request for requesting a reply including processing speed information of the reception side communication device 200 to the reception side communication device 200 by infrared communication. When receiving a reply from the receiving communication device 200, the receiving environment acquiring unit 104 acquires the processing speed information of the receiving communication device 200 included in the reply.

  The transmission environment setting unit 106 reads transmission environment information associated with the reception environment information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102, and transmits infrared communication based on the read transmission environment information. Set the environment. For example, the transmission environment setting unit 106 receives the processing speed information of the receiving-side communication apparatus 200 from the reception environment acquisition unit 104 and associates the packet size stored in the environment setting information storage unit 102 with the received processing speed information. read out. Further, the transmission environment setting unit 106 notifies the data transmission unit 108 of the read packet size.

  The content data acquisition unit 110 accesses the content server 300 via the network 500 and downloads content data stored in the content server 300 and a content ID for identifying the content. Further, the content data acquisition unit 110 stores the downloaded content data in the content data storage unit 112 in association with the content ID. An example of content data is music data having a MIDI or PCM format. However, the content data is not limited to this, and may be music data having another format, image data, text data, or the like.

  The data transmission unit 108 transmits the content data stored in the content data storage unit 112 to the reception-side communication device 200 in the transmission environment set by the transmission environment setting unit 106. For example, the data transmission unit 108 generates a packet by dividing the content data with the packet size notified from the transmission environment setting unit 106, and sequentially transmits the packet to the reception-side communication device 200 for each packet.

  The content transmission report unit 114 notifies the management server 400 that the data transmission unit 108 has transmitted the content to the receiving communication device 200. For example, the content transmission report unit 114 stores an e-mail address of the management server 400 in advance, creates an e-mail including identification information for identifying the mobile phone 100 and the receiving communication device 200 and a content ID, It transmits to the address of the management server 400 stored.

  With the above configuration, the mobile phone 100 can transmit the content data more quickly and reliably according to the reception environment of the receiving-side communication device 200.

  The recording medium 120 stores a program that causes the environment setting information storage unit 102 to operate the content transmission report unit 114. The cellular phone 100 may cause the environment setting information storage unit 102 to operate the content transmission report unit 114 by installing the program stored in the recording medium 120. Furthermore, as another method, the mobile phone 100 may acquire such a program via a communication line.

  FIG. 3 is an example of reception environment information and transmission environment information stored in the environment setting information storage unit 102. 3A is an example of a combination of reception environment information and transmission environment information, FIG. 3B is another example of reception environment information, and FIG. 3C is a transmission environment information. It is another example of information.

  In the example shown in FIG. 3A, the environment setting information storage unit 102 stores processing speed information as reception environment information. Further, the environment setting information storage unit 102 stores the packet size as transmission environment information in association with the processing speed information. Here, the processing speed information indicates the processing speed of data after the data is received by the partner infrared communication apparatus.

  When this processing speed is low, it takes a long time until the data of the received packet is received by the receiving side infrared communication apparatus and the data of the next packet can be received. Therefore, if the packet size is large, data may not be transmitted / received at the theoretical value of the communication speed that can be transmitted / received between infrared communications. In this case, transmission waiting occurs in the infrared communication apparatus on the transmission side. Therefore, from the viewpoint of certainty, it is preferable that the transmission-side infrared communication device cuts and transmits content data into small packet sizes.

  On the other hand, if the data is divided into small packet sizes while maintaining the theoretical value of the communication speed, the number of packets transmitted per unit time increases. Each packet takes a predetermined time to generate a packet, for example, a header including information indicating the order thereof. For example, if the number of packets is large, the time required for transmission processing in the infrared communication apparatus on the transmission side becomes long. Therefore, from the viewpoint of shortening the time until data transmission / reception is completed, if the processing speed of the receiving infrared communication device is fast, the number of packets can be reduced by increasing the packet size in the transmitting infrared communication device. It is preferable to transmit.

  Therefore, the environment setting information storage unit 102 illustrated in FIG. 3A stores a smaller packet size as the processing speed indicated by the processing speed information is lower. As a result, when the processing speed of the receiving-side communication apparatus 200 is low, certainty is emphasized, and when the processing speed is high, the content data can be transmitted earlier. Here, the processing speed information indicates the degree of “fast”, “medium”, and “slow”. Instead of this, a measurement value obtained by measuring the processing speed by a predetermined method may be used as the processing speed information. Alternatively, the packet size (sometimes referred to as a frame) that can be received at one time may be used as the processing speed information.

  As shown in FIG. 3B, as another example of reception environment information, the environment setting information storage unit 102 may store round trip time information or reception intensity information. As shown in FIG. 3C, as another example of the transmission environment information, the environment setting information storage unit 102 may store a theoretical value of transmission speed or transmission intensity.

  In FIG. 3, the reception environment information and the transmission environment information are divided into three pieces, but may be two pieces or four pieces or more.

  FIG. 4 is a functional block diagram illustrating functions of the receiving-side communication device 200. 4 includes a reception environment information storage unit 202 that stores reception environment information, and a reception environment transmission unit that transmits the reception environment information stored in the reception environment information storage unit 202 to the mobile phone 100. 206 and an intensity measurement unit 204 that measures the reception intensity in the data received from the mobile phone 100. Reception-side communication apparatus 200 is further stored in data receiving unit 210 that receives data from mobile phone 100, content data storage unit 208 that stores content data received from mobile phone 100, and content data storage unit 208. A content reproduction unit 212 for reproducing content data.

  When the data reception unit 210 receives a reply request indicating that the reception environment information should be returned from the mobile phone 100, the reception environment transmission unit 206 transmits the reception environment information to the mobile phone 100. For example, when the reception environment transmission unit 206 receives a reply request indicating that the processing speed information should be returned, the reception environment transmission unit 206 reads the processing speed information stored in the reception environment information storage unit 202 and carries the read processing speed information. Send to phone 100. In addition, the reception environment transmission unit 206 receives the reception strength information generated by the strength measurement unit 204 when receiving a reply request that the reception strength information should be returned, and sends the received reception strength information to the mobile phone 100. Send.

  The intensity measuring unit 204 measures the intensity of data received by the data receiving unit 210. For example, the intensity difference between the binary values “1” and “0” received by the data receiving unit 210, for example, the voltage difference at the time of reception in the photoelectric element is measured to generate reception intensity information.

  The data reception unit 210 receives data from the mobile phone 100 and, when the data is a reply request, notifies the reception environment transmission unit 206 of the reply request. In addition, when the data received from the mobile phone 100 is content data, the data receiving unit 210 stores the data in the content data storage unit 208.

  The content reproduction unit 212 reproduces content data stored in the content data storage unit 208 at a predetermined timing. For example, when the receiving communication device 200 is a microwave oven and the content data is music data, the content reproducing unit 212 notifies the user when cooking is completed in the receiving communication device 200. Accordingly, the music data stored in the content data storage unit 208 is read, and the read music data is reproduced to output music.

  FIG. 5 shows an example of reception environment information stored in the reception environment information storage unit 202. The reception environment information storage unit 202 illustrated in FIG. 5 stores processing speed information as reception environment information in association with a device ID that identifies the reception-side communication device 200 and a service ID that identifies a service related to content. This service ID is used for fee collection and copyright management. For example, when the mobile phone 100 reads the service ID from the receiving-side communication device 200 and the read service ID matches a predetermined service ID, it is determined that transmission of the content data is permitted, and the content data Send.

  FIG. 6 is an example of a flowchart illustrating an operation of performing infrared communication between the mobile phone 100 and the receiving-side communication device 200. The flowchart shown in FIG. 6 shows an example of operation using processing speed information and packet size as a set of reception environment information and transmission environment information.

  The flowchart shown in FIG. 6 starts when the mobile phone 100 receives a transmission request specifying a content ID from a user.

  First, prior to transmitting the content data, the reception environment acquisition unit 104 of the mobile phone 100 transmits a response request for requesting a response to the processing speed information to the receiving communication device 200 (S100). When receiving a reply request from the mobile phone 100, the data receiving unit 210 of the receiving-side communication device 200 notifies the reception environment transmitting unit 206 to that effect.

  Receiving the notification, the reception environment transmission unit 206 reads the processing speed information stored in the reception environment information storage unit 202 (S110), and returns the read processing speed information to the mobile phone 100 (S210). In steps S110 and S210, the reception environment transmission unit 206 also reads out the device ID and service ID stored in the reception environment information storage unit 202, and transmits the processing speed information to the mobile phone 100 in association with them. Good.

  In the steps so far, the infrared communication between the mobile phone 100 and the receiving side communication device 200 is performed in an initially set transmission / reception environment. For example, the packet size, the theoretical value of the communication speed, and the transmission intensity are set in advance in the mobile phone 100 and the receiving-side communication device 200, and infrared communication is performed based on the settings.

  The reception environment acquisition unit 104 of the mobile phone 100 acquires the processing speed information of the reception side communication device 200 included in the reply received from the reception side communication device 200, and notifies the transmission environment setting unit 106 (S130). Upon receiving the notification, the transmission environment setting unit 106 reads out the packet size associated with the processing speed information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 of the packet size. The transmission environment is set (S140). In this case, the transmission environment setting unit 106 does not change other transmission environments such as the theoretical value of the communication speed.

  Next, the data transmission unit 108 reads content data stored in the content data storage unit 112 in association with the content ID specified by the user. Further, the data transmission unit 108 divides the content data with the packet size notified by the transmission environment setting unit 106, generates a packet by adding a header indicating the order to the divided content data, and transmits the generated packet to the receiving side communication. It transmits to the apparatus 200 (S150).

  The data receiving unit 210 reads the header of the packet received from the mobile phone 100, and stores the content data included in the packet in the content data storage unit 208 according to the order indicated by the header (S180). Furthermore, when the data receiving unit 210 has received all of the content data, the data receiving unit 210 transmits a reception confirmation to the mobile phone 100 (S160).

  The content transmission report unit 114 of the mobile phone 100 receives information indicating that the content is transmitted from the mobile phone 100 to the receiving communication device 200 together with the content ID when receiving the reception confirmation from the receiving communication device 200. Then, the management server 400 is notified (S170). Above, the flowchart shown in FIG. 6 is complete | finished.

  With the above operation, when the processing speed of the receiving-side communication device 200 is slow, the reliability is emphasized, and when the processing speed is fast, the content data can be transmitted earlier. In step S140, the transmission environment setting unit 106 does not change other environments for transmission such as the theoretical value of the communication speed, but as another example, other environments for transmission may also be changed.

  As another form of FIG. 6, an example of operation in which processing speed information and communication speed are used as a set of reception environment information and transmission environment information will be described. The description of the same operation as that of FIG. 6 is omitted.

  In this form, the environment setting information storage unit 102 stores the communication speed in association with the processing speed information. Here, when the processing speed is low, it takes a long time until the data of the received packet is completed in the receiving side infrared communication apparatus and the data of the next packet can be received. Therefore, if the communication speed is high, data may not be transmitted / received at the theoretical value of the communication speed that can be transmitted / received between infrared communication. Therefore, from the viewpoint of certainty, it is preferable that the infrared communication apparatus on the transmission side transmits packets with a slower theoretical value of communication speed. On the other hand, if the theoretical value of the communication speed is decreased, the amount of data transmitted from the infrared device on the transmission side is reduced per time, so that it takes longer time to transmit all the content data. Therefore, from the viewpoint of shortening the time until data transmission / reception is completed, if the processing speed of the receiving infrared communication device is fast, the number of packets can be reduced by increasing the packet size in the transmitting infrared communication device. It is preferable to transmit. Therefore, as shown in FIG. 3, the environment setting information storage unit 102 stores a slower communication speed as the processing speed indicated by the processing speed information is lower.

  In step S140 of FIG. 6, the transmission environment setting unit 106 reads the communication speed associated with the processing speed information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 of the communication speed. By doing so, the transmission environment is set. Next, the data transmission unit 108 reads content data stored in the content data storage unit 112 in association with the content ID specified by the user. The data transmission unit 108 further transmits the packet to the receiving-side communication device 200 at the communication speed notified by the transmission environment setting unit 106 (S150).

  As a result, when the processing speed of the receiving-side communication apparatus 200 is low, certainty is emphasized, and when the processing speed is high, the content data can be transmitted earlier.

  As still another form of FIG. 6, an example of operation in which round trip time information and packet size are used as a set of reception environment information and transmission environment information will be described. The description of the same operation as that of FIG. 6 is omitted.

  In this form, the environment setting information storage unit 102 stores the packet size in association with the round trip time information. Here, when the round trip time indicated by the round trip time information is long, it indicates that the distance between the infrared communication devices is long. When the distance between these infrared communications is long, the number of so-called packet lost that cannot receive a packet, or the ratio of the packet lost to the transmitted packet becomes high. Therefore, from the viewpoint of certainty, it is preferable that the transmission-side infrared communication device reduce the packet size. On the other hand, as described above, when the packet size is reduced, the time until data transmission / reception is completed becomes longer. Therefore, as shown in FIG. 3, the environment setting information storage unit 102 stores a smaller packet size in association with the longer the round trip time indicated by the round trip time information.

  In step S <b> 100 of FIG. 6, the reception environment acquisition unit 104 transmits a reply request for requesting a reply to the receiving-side communication device 200. In this case, the reception environment acquisition unit 104 may transmit a response request for inquiring about the device ID and service ID of the reception side communication device 200 to the reception side communication device 200. Furthermore, the reception environment acquisition unit 104 uses a clock inside the mobile phone 100 to measure the time since the reply request was transmitted.

  In step S <b> 120, the reception environment acquisition unit 104 measures the time from when the reply request is transmitted until when the reply from the receiving communication device 200 is received. The time measured here includes a response time in the receiving-side communication device 200. Therefore, the reception environment acquisition unit 104 stores in advance the time from when a reply request is transmitted until the reply is received when the distance between the devices is almost zero, for example, several centimeters, as a reference round trip time. Round trip time information is calculated by subtracting this reference round trip time from the measured round trip time.

  Next, in S140, the transmission environment setting unit 106 reads the packet size associated with the round trip time information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 of the packet size. To set the transmission environment.

  Thereby, when the distance between the mobile phone 100 and the receiving side communication device 200 is long, the certainty is emphasized, and when the distance is short, the content data can be transmitted earlier.

  As yet another form of FIG. 6, round trip time information and communication speed may be used as a set of reception environment information and transmission environment information. In this form, as shown in FIG. 3, the environment setting information storage unit 102 stores a slower communication speed in association with the longer the round trip time indicated by the round trip time information.

  In this case, the transmission environment setting unit 106 reads the communication speed associated with the round-trip time information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 (S140). . The data transmission unit 108 transmits the content data to the reception side communication device 200 at the communication speed notified by the transmission environment setting unit 106 (S150). Others are the same as the embodiment shown in FIG. Thereby, when the distance between the mobile phone 100 and the receiving side communication device 200 is long, the certainty is emphasized, and when the distance is short, the content data can be transmitted earlier.

  As yet another form of FIG. 6, round trip time information and transmission intensity may be used as a set of reception environment information and transmission environment information. In this form, as shown in FIG. 3, the environment setting information storage unit 102 stores a larger transmission intensity in association with the longer the round trip time indicated by the round trip time information.

  In this case, the transmission environment setting unit 106 reads the transmission intensity associated with the round trip time information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 (S140). . The data transmission unit 108 transmits the content data to the reception side communication device 200 with the transmission strength notified by the transmission environment setting unit 106 (S150). Other operations are the same as those shown in FIG. Thereby, when the distance between the mobile phone 100 and the receiving-side communication device 200 is long, the reliability is emphasized, and when the distance is short, transmission can be performed with reduced output.

  As still another form of FIG. 6, reception intensity information and packet size may be used as a set of reception environment information and transmission environment information. In this embodiment, as shown in FIG. 3, the environment setting information storage unit 102 stores a smaller packet size in association with the reception intensity indicated by the reception intensity information.

  In step S <b> 100 of FIG. 6, the reception environment acquisition unit 104 transmits a reply request for requesting a reply including the reception strength information to the reception-side communication apparatus 200. In step S <b> 110, when the data reception unit 210 receives a reply of reception strength information, the data reception unit 210 notifies the strength measurement unit 204 to that effect. Upon receiving the notification, the strength measuring unit 204 measures the strength of the data received by the data receiving unit 210 and generates reception strength information. For example, the intensity difference between the binary values “1” and “0” received by the data receiving unit 210, for example, a voltage difference is measured, and reception intensity information is generated. The intensity measurement unit 204 notifies the reception environment transmission unit 206 of the generated reception intensity information.

  In step S <b> 120, the reception environment transmission unit 206 returns the reception intensity information notified from the intensity measurement unit 204 to the reception-side communication device 200. Subsequent operations are the same as those shown in FIG.

  As a result, when the reception strength of the reception-side communication apparatus 200 is small, certainty is emphasized, and when the reception strength is high, the content data can be transmitted more quickly.

  As yet another form of FIG. 6, reception intensity information and communication speed may be used as a set of reception environment information and transmission environment information. In this form, as shown in FIG. 3, the environment setting information storage unit 102 stores a lower communication speed in association with the smaller reception intensity indicated by the reception intensity information.

  In this case, the transmission environment setting unit 106 reads out the communication speed associated with the reception intensity information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 (S140). . The data transmission unit 108 transmits the content data to the reception side communication device 200 at the communication speed notified by the transmission environment setting unit 106 (S150). As a result, when the reception strength of the reception-side communication apparatus 200 is small, certainty is emphasized, and when the reception strength is high, the content data can be transmitted more quickly.

  As yet another form of FIG. 6, reception intensity information and transmission intensity may be used as a set of reception environment information and transmission environment information. In this form, as shown in FIG. 3, the environment setting information storage unit 102 stores a larger transmission strength in association with the smaller reception strength indicated by the reception strength information.

  In this case, the transmission environment setting unit 106 reads the transmission intensity associated with the reception intensity information acquired by the reception environment acquisition unit 104 from the environment setting information storage unit 102 and notifies the data transmission unit 108 (S140). . The data transmission unit 108 transmits the content data to the reception side communication device 200 with the transmission strength notified by the transmission environment setting unit 106 (S150). As a result, when the reception strength of the reception-side communication device 200 is low, certainty is emphasized, and when the reception strength is high, the content data can be transmitted with reduced output.

  As described above, according to the present embodiment, data can be transmitted more quickly and reliably according to the reception environment of the receiving-side communication device 200.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

It is the schematic of the content transmission / reception system 10 which can apply this embodiment. It is a functional block diagram explaining the function of the mobile telephone 100 which concerns on this embodiment. It is an example of reception environment information and transmission environment information stored in the environment setting information storage unit. 3 is a functional block diagram illustrating functions of a receiving communication device 200. FIG. An example of reception environment information stored in the reception environment information storage unit 202 is shown. 6 is an example of a flowchart illustrating an operation of performing infrared communication between the mobile phone 100 and the receiving-side communication device 200.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Content transmission / reception system 100 Mobile phone 102 Environment setting information storage part 104 Reception environment acquisition part 106 Transmission environment setting part 108 Data transmission part 110 Content data acquisition part 112 Content data storage part 114 Content transmission report part 120 Recording medium 200 Reception side communication apparatus 202 reception environment information storage unit 204 intensity measurement unit 206 reception environment transmission unit 208 content data storage unit 210 data reception unit 212 content reproduction unit 300 content server 400 management server 500 network

Claims (27)

A short-range wireless communication device,
An environment setting information storage unit for storing transmission environment information for setting a transmission environment of the short-range wireless communication in association with reception environment information indicating a reception environment of the short-range wireless communication;
A reception environment acquisition unit that acquires reception environment information indicating a reception environment of short-range wireless communication in the partner's short-range wireless communication device from the partner's short-range wireless communication device by short-range wireless communication; and
The transmission environment information associated with the reception environment information acquired by the reception environment acquisition unit is read from the environment setting information storage unit, and the transmission environment of short-range wireless communication is set based on the read transmission environment information A transmission environment setting section to
A short-range wireless communication apparatus comprising: a data transmission unit configured to transmit data to the counterpart short-range wireless communication apparatus in a transmission environment set by the transmission environment setting unit. The environment setting information storage unit stores processing speed information indicating a processing speed of data after receiving data in the short-range wireless communication device as the reception environment information,
The short-range wireless communication device according to claim 1, wherein the reception environment acquisition unit acquires processing speed information in the short-range wireless communication device of the counterpart by short-range wireless communication from the short-range wireless communication device of the counterpart. The environment setting information storage unit stores information indicating a smaller packet size as the transmission environment information as the processing speed indicated by the processing speed information is lower.
The transmission environment setting unit reads the packet size associated with the processing speed information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 2, wherein the data transmission unit separates data to be transmitted based on the packet size notified by the transmission environment setting unit and transmits the data to the short-range wireless communication device of the other party. The environment setting information storage unit stores information indicating a slower communication speed as the transmission environment information as the processing speed indicated by the processing speed information is slower.
The transmission environment setting unit reads the communication speed associated with the processing speed information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 2, wherein the data transmission unit transmits data to the near-field wireless communication device of the other party at the communication speed notified by the transmission environment setting unit. The environment setting information storage unit stores round-trip time information indicating a time for data to reciprocate between short-range wireless communication devices as the reception environment information.
The reception environment acquisition unit transmits a reply request for requesting a reply to the partner short-range wireless communication device, and transmits a reply request until receiving a reply from the partner short-range wireless communication device. The short-range wireless communication device according to claim 1, wherein the round-trip time information is acquired by measuring time. The environment setting information storage unit stores, as the transmission environment information, information indicating a smaller packet size as the round trip time indicated by the round trip time information is longer.
The transmission environment setting unit reads the packet size associated with the round-trip time information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 5, wherein the data transmission unit separates data to be transmitted with the packet size notified by the transmission environment setting unit and transmits the data to the short-range wireless communication device of the other party. The environment setting information storage unit stores, as the transmission environment information, information indicating a slower communication speed as the round trip time indicated by the round trip time information is longer.
The transmission environment setting unit reads the communication speed associated with the round-trip time information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 5, wherein the data transmission unit transmits data to the near-field wireless communication device of the other party at a communication speed notified by the transmission environment setting unit. The environment setting information storage unit stores, as the transmission environment information, information indicating a larger transmission intensity as the round trip time indicated by the round trip time information is longer.
The transmission environment setting unit reads the transmission intensity associated with the round trip time information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 5, wherein the data transmission unit transmits data to the counterpart short-range wireless communication device with the transmission strength notified by the transmission environment setting unit. The environment setting information storage unit stores reception strength information indicating reception strength in the short-range wireless communication device as the reception environment information,
The reception environment acquisition unit transmits a reply request for requesting a reply including reception strength information to the counterpart short-range wireless communication device, and the reception strength information included in the reply from the counterpart short-range wireless communication device. The near field communication apparatus according to claim 1 to acquire. The environment setting information storage unit stores information indicating a smaller packet size as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting unit reads out the packet size associated with the reception intensity information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 9, wherein the data transmission unit separates data to be transmitted based on the packet size notified by the transmission environment setting unit and transmits the data to the short-range wireless communication device of the other party. The environment setting information storage unit stores information indicating a slower communication speed as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting unit reads the communication speed associated with the reception intensity information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 9, wherein the data transmission unit transmits data to the near-field wireless communication device of the other party at a communication speed notified by the transmission environment setting unit. The environment setting information storage unit stores, as the transmission environment information, information indicating a larger transmission intensity as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting unit reads the transmission strength associated with the reception strength information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit,
The short-range wireless communication device according to claim 9, wherein the data transmission unit transmits data to the near-field wireless communication device of the other party with the transmission strength notified by the transmission environment setting unit. The environment setting information storage unit stores, as transmission environment information, information indicating a smaller packet size as the reception environment information reception environment is worse.
The transmission environment setting unit reads the packet size associated with the reception environment information acquired by the reception environment acquisition unit from the environment setting information storage unit and notifies the data transmission unit;
The short-range wireless communication device according to claim 1, wherein the data transmission unit separates data to be transmitted based on the packet size notified by the transmission environment setting unit and transmits the data to the short-range wireless communication device of the other party. A short-range wireless communication method,
In association with the reception environment information indicating the reception environment of the short-range wireless communication, the transmission environment information for setting the transmission environment of the short-range wireless communication is stored in the environment setting information storage unit,
Receiving environment information indicating the reception environment of short-range wireless communication in the other party's short-range wireless communication device is acquired from the other party's short-range wireless communication device by short-range wireless communication,
Read the transmission environment information associated with the acquired reception environment information from the environment setting information storage unit, set the transmission environment of short-range wireless communication based on the read transmission environment information,
A short-range wireless communication method for transmitting data to the near-field wireless communication device of the other party in a set transmission environment. A program for controlling a short-range wireless communication device, the short-range wireless communication device,
Environment setting information storage function for storing transmission environment information for setting a transmission environment of the short-range wireless communication in association with reception environment information indicating a reception environment of the short-range wireless communication;
A reception environment acquisition function for acquiring reception environment information indicating a reception environment of short-range wireless communication in the other party's short-range wireless communication device from the other party's short-range wireless communication device by short-range wireless communication;
The transmission environment information associated with the reception environment information acquired by the reception environment acquisition function is read from the environment setting information storage function, and the transmission environment of short-range wireless communication is set based on the read transmission environment information Transmission environment setting function, and
A program for realizing a data transmission function for transmitting data to the other party's short-range wireless communication device in a transmission environment set by the transmission environment setting function. The environment setting information storage function stores processing speed information indicating a processing speed of data after receiving data in the short-range wireless communication device as the reception environment information,
The program according to claim 15, wherein the reception environment acquisition function acquires processing speed information in the partner short-range wireless communication device from the partner short-range wireless communication device by short-range wireless communication. The environment setting information storage function stores, as the transmission environment information, information indicating a smaller packet size as the processing speed indicated by the processing speed information is slower.
The transmission environment setting function reads out the packet size associated with the processing speed information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 16, wherein the data transmission function separates data to be transmitted based on the packet size notified by the transmission environment setting function and transmits the data to the near field communication device of the other party. The environment setting information storage function stores, as the transmission environment information, information indicating a slower communication speed as the processing speed indicated by the processing speed information is slower.
The transmission environment setting function reads the communication speed associated with the processing speed information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 17, wherein the data transmission function transmits data to the near-field wireless communication device of the other party at a communication speed notified by the transmission environment setting function. The environment setting information storage function stores, as the reception environment information, round-trip time information indicating a time during which data reciprocates between short-range wireless communication devices,
The reception environment acquisition function transmits a reply request requesting a reply to the other party's short-range wireless communication device, and transmits a reply request until receiving a reply from the partner's near-field wireless communication device. The program according to claim 15, wherein the round-trip time information is acquired by measuring time. The environment setting information storage function stores, as the transmission environment information, information indicating a smaller packet size as the round trip time indicated by the round trip time information is longer.
The transmission environment setting function reads out the packet size associated with the round trip time information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 19, wherein the data transmission function separates data to be transmitted based on the packet size notified by the transmission environment setting function and transmits the data to the near field communication device of the other party. The environment setting information storage function stores, as the transmission environment information, information indicating a slower communication speed as the round trip time indicated by the round trip time information is longer.
The transmission environment setting function reads the communication speed associated with the round-trip time information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 19, wherein the data transmission function transmits data to the near field communication device of the other party at the communication speed notified by the transmission environment setting function. The environment setting information storage function stores, as the transmission environment information, information indicating a larger transmission intensity as the round trip time indicated by the round trip time information is longer.
The transmission environment setting function reads the transmission intensity associated with the round trip time information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 19, wherein the data transmission function transmits data to the near field communication device of the other party at the transmission intensity notified by the transmission environment setting function. The environment setting information storage function stores reception strength information indicating reception strength in a short-range wireless communication device as the reception environment information,
The reception environment acquisition function transmits a reply request for requesting a reply including reception intensity information to the other party's short-range wireless communication device, and the reception strength information included in the reply from the other party's short-range wireless communication apparatus The program according to claim 15 to be acquired. The environment setting information storage function stores information indicating a smaller packet size as the transmission environment information as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting function reads the packet size associated with the reception strength information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 23, wherein the data transmission function separates data to be transmitted based on the packet size notified by the transmission environment setting function and transmits the data to the near field communication device of the other party. The environment setting information storage function stores, as the transmission environment information, information indicating a slower communication speed as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting function reads the communication speed associated with the reception intensity information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 23, wherein the data transmission function transmits data to the near-field wireless communication device of the other party at the communication speed notified by the transmission environment setting function. The environment setting information storage function stores, as the transmission environment information, information indicating a larger transmission intensity as the reception intensity indicated by the reception intensity information is smaller.
The transmission environment setting function reads out the transmission intensity associated with the reception intensity information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 23, wherein the data transmission function transmits data to the near field communication device of the other party at the transmission strength notified by the transmission environment setting function. The environment setting information storage function stores, as transmission environment information, information indicating a smaller packet size as the reception environment information reception environment is worse.
The transmission environment setting function reads the packet size associated with the reception environment information acquired by the reception environment acquisition function from the environment setting information storage function and notifies the data transmission function,
The program according to claim 15, wherein the data transmission function separates data to be transmitted based on the packet size notified by the transmission environment setting function and transmits the data to the near field communication device of the other party.

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