JP2005295003A - Wireless communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal which more reduces its power consumption to prolong its operating time. <P>SOLUTION: The radio communication terminal wirelessly communicates between a first and second relay stations in a first and second communication areas, the second communication area is narrower than the first communication area, and the up-link communication to the second relay station is made at a higher speed than to the first relay station. Based on a user's input, the terminal designates either the first or second relay station to which it will send transmission data. If the data sending destination is the first relay station and the terminal belongs to inside the first communication area, it sends the transmission data to the first relay station. If the transmission data output is addressed to the second relay station, the terminal belongs to inside the second communication area. If the value of a required transmission power for sending the data to the second relay station meets requirements depending on a transmission power threshold, it sends the transmission data to the second relay station. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio communication terminal, and more particularly to a radio communication terminal used in a hierarchical radio communication system in which two radio communication systems having different communication areas and transmission bandwidths coexist.

  In Japanese Patent Laid-Open No. 2002-209276 (Patent Document 1), as “data transfer system and data transfer method”, data transmission using a narrowband link in a first communication area and a second communication area narrower than that are used. There is a description about data transmission using a broadband link.

  In this conventional example, in the case of a terminal having two transmission functions and large-capacity data transmission, it is determined whether or not the terminal has entered the second communication area after a transmission request is reserved for the terminal. Is determined to have entered the second communication area, the large-capacity data is transmitted.

  That is, in this conventional example, permission for transmission is given when entering the second communication area. Since the purpose of this conventional example is to reduce the communication fee, transmission starts immediately upon entering a wireless LAN or Bluetooth communication area that is presumed to be a low fee.

  Generally, when entering the communication area from outside the communication area, the terminal is located at the periphery of the communication area or at the communication cell edge. As a special case, the terminal may move from an out-of-sight elevator (where the radio wave does not reach) to the elevator hall where the base station is installed. However, in general, communication is performed from a cell edge far from the base station. In many cases, a terminal enters a possible area.

Therefore, in the above-described conventional example, the terminal has a lot of opportunities to perform transmission far away from the base station. Therefore, for example, even if a base station is installed near a place where terminals such as building entrances and station ticket gates will always pass, transmission is performed at a place that requires greater transmission power farther than the base station. Is completed, and data transmission is often completed when the terminal passes immediately close to the base station.
JP 2002-209276 JP JP2003-9253 Japanese Patent Laid-Open No. 2000-2273 Japanese Patent Laid-Open No. 11-234242 JP 2002-288094 JP

  As described above, in the conventional example, the terminal performs transmission in the peripheral part of the communication area that requires a larger transmission power, and therefore, the power consumption increases and the operation time of the terminal increases. There was a problem of shortening.

  An object of the present invention is to provide a wireless communication terminal that can further reduce the power consumption of the terminal and thereby increase the operating time of the terminal.

  The wireless communication terminal according to the present invention performs wireless communication with a first relay station in a first communication area, and performs second relay in a second communication area that is narrower than the first communication area. A wireless communication terminal capable of performing wireless communication with a station, a first transmission unit for transmitting input data to the first relay station, and input data to the first relay station A second transmitter that transmits to the second relay station at a higher speed than the transmitter, a detector that detects a communication area to which the terminal belongs, and a distance that calculates the distance between the terminal and the second relay station A calculation unit, a transmission power value calculation unit that calculates a required transmission power value necessary for transmitting data to the second relay station at the location of the terminal based on the distance, and a transmission power threshold value are stored Threshold storage and data holding for storing transmission data A transmission destination instructing unit for instructing which of the first and second relay stations to transmit the transmission data based on the input instruction signal, and the transmission destination of the transmission data is the first relay If it is a station, if the terminal belongs to the first communication area, the transmission data is output to the first transmission unit, while the transmission destination of the transmission data is the second relay station An output control unit that outputs the transmission data to the second transmission unit when the terminal belongs to the second communication area and the required transmission power value satisfies a condition based on the transmission power threshold; It is provided with.

  According to the present invention, the power consumption of the terminal can be further reduced, and thereby the operation time of the terminal can be lengthened.

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

(First embodiment)
FIG. 1 is a block diagram schematically showing a configuration of a wireless communication terminal according to the present invention.

  FIG. 2 is a diagram illustrating a configuration of a wireless communication system including the wireless communication terminal.

  The first radio 101 shown in FIG. 1 forms a first radio link with the first base station 201 belonging to the first communication area 200 (for example, a mobile phone area) in FIG. 2 to perform data communication. I do.

  The second radio 102 performs data communication by forming a second radio link with the second base station 202 belonging to the second communication area 203 (for example, a wireless LAN area).

  The first communication area 200 is larger than the second communication area 203. For example, the first communication area 200 includes the second communication area 203. Uplink communication from the second radio 102 to the second base station 202 is faster than uplink communication from the first radio 101 to the first base station 201. The communication fee between the first wireless device 101 and the first base station 201 is higher than the communication fee between the second wireless device 102 and the second base station 202, for example.

  Returning to FIG. 1, the data processing circuit 103 transfers various data between the first wireless device 101, the second wireless device 102, a data input / output circuit 105, a display circuit 113, and a control circuit 115 described later. Interact.

  The data transmission reservation function unit 104 in the data processing circuit 103 determines whether the transmission data input from the data input / output circuit 105 is output to the first wireless device 101 or the second wireless device 102. The data transmission reservation function unit 104 outputs the transmission data to the first wireless device 101 immediately when outputting the transmission data to the first wireless device 101. On the other hand, when outputting the transmission data to the second radio device 102, the transmission data is temporarily stored in the memory 106. More specifically, the data transmission reservation function unit 104 stores the transmission data in the memory 106 as transmission reservation data together with a transmission reservation flag. The determination of whether the transmission data is output to the first wireless device 101 or the second wireless device 102 is based on various criteria described later.

  The modulator 107 in the second wireless device 102 modulates the transmission data received from the data processing circuit 103. The transmission power control circuit 109 controls and outputs the transmission power of the modulated signal to a value calculated by a required transmission power estimation circuit 108 described later. The tuner 110 converts the input transmission signal into a radio frequency signal and transmits it through an antenna.

  At the time of reception, tuner 110 converts the received radio frequency signal into a baseband signal and outputs it to demodulator 112. The demodulator 112 demodulates the input baseband signal and outputs the demodulated data to the data processing circuit 103. The data processing circuit 103 stores the input demodulated data in the memory 106. The data processing circuit 103 outputs the data in the memory 106 to, for example, the display circuit 113, and the display circuit 113 displays the input data on a screen (not shown).

  The communication area detection function unit 114 in the second wireless device 102 periodically detects whether or not the terminal exists in the second communication area 203. That is, the communication area detection function unit 114 periodically determines whether or not the terminal has entered from the outside of the second communication area 203 to the inside.

  The required transmission power estimation circuit 108 estimates (calculates) transmission power necessary for transmitting data from the position of the terminal in the second communication area 203 to the second base station 202. More specifically, the required transmission power estimation circuit 108 estimates the distance from the terminal to the second base station 202 by measuring the electric field strength of the broadcast channel broadcast from the second base station 202, and the estimated distance Based on the above, it is estimated how much transmission power can be used to perform suitable communication with the second base station 202. The required transmission power estimation circuit 108 outputs the estimated transmission power value (required transmission power value) to the control circuit 115.

  The control circuit 115 controls the data processing circuit 103, the first wireless device 101, and the second wireless device 102. The control circuit 115 compares the required transmission power value input from the required transmission power estimation circuit 108 with an allowable transmission power value (threshold value). For example, the allowable transmission power value is stored in advance in the memory 106 described above. The control circuit 115 outputs a data transmission permission signal to the data processing circuit 103 when the required transmission power value is less than or equal to the allowable transmission power value.

  The data processing circuit 103 outputs the transmission reservation data stored in the memory 106 to the second radio device 102 only when the data transmission permission signal is received.

  Similarly to the second wireless device 102, the first wireless device 101 includes a modulator, a transmission power control circuit, a tuner, a demodulator, and a communication area detection function unit (all not shown). However, the communication area detection function unit determines whether or not the terminal exists in the first area 200. The transmission power control circuit controls the transmission power to the first base station 201 to a specified value. However, similarly to the case of the second wireless device 102, the transmission power may be variable.

  The radio control station 205 illustrated in FIG. 2 manages the first base station 201 and the second base station 202. The radio control station 205 outputs the data received from the first base station 201 and the second base station 202 to the network 206. The network 206 transfers the data and passes it to the destination device (for example, the server 208 in FIG. 2, a wireless terminal not shown). When data is transferred to the server 208, the server 208 stores the received data in the database 209.

  FIG. 3 is a flowchart illustrating an example of the operation of the above-described wireless communication terminal.

  First, it is assumed that the user performs moving image shooting using the moving image shooting function built in the terminal at a position A1 in FIG.

  The user makes a transmission request to the terminal to transmit the moving image data to the server 208 (step S12). At this time, since the size of the transmission data is very large, the user sets transmission reservation for performing data transmission from the second wireless device 102 (step S12). This is because, when data is transmitted from the first wireless device 101, the transmission speed is low, so that a long time is required for transmission, resulting in an increase in power consumption. The transmission reserved data (transmission reservation data) is stored in the memory 106 together with the transmission reservation flag (step S12).

  It is assumed that the user moves further inward within the first communication area 200 and enters the second communication area 203. That is, it is assumed that the communication area detection function unit 114 recognizes that the terminal has entered the second communication area 203 (steps S13 to S15).

  Thereafter, the user moves further inward in the second communication area 203, and the required transmission power value calculated by the required transmission power estimation circuit 108 at the position B becomes equal to or less than the allowable transmission power value. (Steps S16 to S19). The data processing circuit 103 outputs the data in the memory 106 to the second radio device 102, and the second radio device 102 transmits the received data to the second base station 202 (step S20).

  That is, when the terminal enters the second communication area 203, since the distance to the second base station 202 is long, if the terminal does not transmit with a sufficiently large transmission power, the second base station 202, It is difficult to suitably receive the transmission data. However, when the terminal transmits a large amount of data with such a large amount of power, a large amount of power is consumed on the terminal side, and the operating time of a terminal that is normally driven by a battery is significantly shortened. Therefore, in this terminal, as described above, an allowable transmission power value is set in advance in the terminal. This allowable transmission power value is set to a value smaller than the power value necessary for transmission at the end of the second communication area 203 (transmission power value on a normal system). For example, if the system power value is 500 mW, 30mW and so on. Then, as described above, the terminal starts transmission to the second base station 202 when the required transmission power value becomes equal to or less than the allowable transmission power value. That is, as shown in FIG. 2, when the user moves in the second communication area 203 and the terminal enters the vicinity area 204 of the second base station 202, data transmission is started.

  The operation of the terminal described above will be described from yet another point of view.

  FIG. 4 is a diagram for explaining the operation of this terminal from another viewpoint.

  As shown in FIG. 4, it is assumed that a terminal exists outside the second communication area 203 at a position A1, and transmission reservation for large-capacity data is set at this point.

  The second base station 202 is installed in, for example, an entrance or an elevator hall that always passes in life (installed in the entrance 210 here). Therefore, the terminal passes through the second base station 202 with a high probability. That is, if the person who owns the terminal passes the entrance, for example, once a day, the terminal always passes through the nearby area 204 that requires a small amount of transmission power, including directly under the second base station 202. Therefore, an allowable transmission power value necessary for transmission in the vicinity area 204 of the second base station 202 is set in the terminal in advance.

  The terminal moves from the position A1 and enters the second communication area 203 at the position A2. At this position A2 (cell edge), transmission is not performed because the required transmission power value is larger than the allowable transmission power value.

  When the terminal further moves from the position A2 and enters the vicinity area 204 of the second base station 202 (see position B), that is, when the required transmission power value is less than or equal to the allowable transmission power value, the terminal The large-capacity data thus transmitted is transmitted to the second base station 202 at a stretch with low power consumption using a high-speed uplink.

  In the present embodiment described above, the terminal estimates the distance between the terminal and the second base station 202 by measuring the reception power of the broadcast information channel received from the second base station 202, and estimates The required transmission power was calculated based on the distance. In addition, a GPS function is provided in the terminal, the distance between the terminal and the second base station 202 is estimated based on the position of the second base station 202 and the position of the mobile station (not shown), and the required transmission power May be calculated.

  As described above, according to the present embodiment, it is detected whether or not the required transmission power required for transmission to the second base station 202 is equal to or less than the allowable transmission power value, and the required transmission power is the allowable transmission power. When the value is less than or equal to the value, since the data reserved for transmission is transmitted to the second base station 202, a large amount of data reserved for transmission can be transmitted in the vicinity of the second base station 202. As a result, power consumption due to transmission is reduced, and it is possible to dramatically extend the continuous operation time of the terminal.

(Second Embodiment)
In the first embodiment described above, the user explicitly selects the data output destination (the first wireless device 101 and the second wireless device 102). In the second embodiment, the data transmission reservation function unit 104 automatically selects an output destination based on the attribute of transmission data. Hereinafter, this embodiment will be described in detail.

  The power consumption of the terminal is remarkably increased when, for example, a large amount of data is transmitted. Therefore, the data transmission reservation function unit 104 is provided with the data amount as an attribute parameter, and when the data amount is larger than the threshold, the second wireless device 102 transmits (reserves transmission). On the other hand, when the data amount is less than or equal to the threshold value, even in low-speed communication, it does not take much time and power consumption is small. Therefore, priority is given to immediacy, and transmission is performed by the first wireless device 101.

  In addition to the above, in the case of data that should be transmitted at an arbitrary time (when immediacy is not necessarily required), transmission from the vicinity of the second base station 202 using the second radio device 102 is more preferable. Less power consumption. Therefore, the data transmission reservation function unit 104 may be provided with immediacy information indicating whether or not the data requires immediacy as an attribute parameter. Whether or not immediacy is necessary includes a method for determining whether the transmission data belongs to which application, a method for explicitly specifying whether or not the transmission data is immediate in advance, and the like.

  As a specific configuration for realizing the above, the data transmission reservation function unit 104 specifies the attribute of the transmission data input to the data processing circuit 103, and transmits it by the second radio device 102 based on the specified attribute. Whether to perform transmission reservation or to perform transmission by the first wireless device 101.

  More specifically, data attributes and whether the attribute data is reservation type data or non-reservation type data are registered in advance in a table (for example, a table is stored in the data transmission reservation function unit 104). The attribute of the transmission data is made to correspond to the table, and it is determined whether or not the reserved transmission is performed (whether the transmission is performed by either the first wireless device 101 or the second wireless device 102). The terminal displays the result on the terminal screen (display unit). That is, when the input data is reserved transmission, the user is notified of that.

  When the user receives a notification of transmission reservation, if this data needs immediacy and wants to transmit this data even if it consumes a large amount of terminal power, a forced transmission command is input to the terminal (not shown). It is also possible to perform transmission immediately by using the input section.

  In this case, it is preferable to learn the attribute of the forcedly transmitted data and update the above-described table. For example, if there is a high ratio of forced transmission depending on the destination, the attribute of the destination is added to the above-described table, and when the destination of the transmission data is this specific destination, it is not reserved, that is, the first wireless Using the machine 101, the table is updated so that data is transmitted.

  FIG. 5 is a flowchart illustrating an example of the operation of the wireless communication terminal according to the second embodiment of the present invention. In this example, it is determined whether or not to use the second wireless device 102 based on whether or not the data amount is larger than the threshold value α (step S33). If the data amount is equal to or less than the threshold value α (No in step S33), the first wireless device 101 transmits the data with priority on immediacy (step S34). The other steps are the same as those in FIG.

  As described above, according to the present embodiment, since it is determined whether or not to make a transmission reservation based on the attribute of the transmission data, the user can save time and effort for making an explicit transmission reservation.

(Third embodiment)
In the third embodiment, transmission data is divided into data that is immediately transmitted by the first wireless device 101 and data that is reserved and transmitted by the second wireless device 102. Hereinafter, this embodiment will be described in detail.

  In recent years, body data such as e-mails with attached files has a small amount of data such as text data, but the data attached thereto may be a large amount of data such as moving image data or high-definition still images.

  In this case, the entire data is not handled as one data, but the transmission data is divided into text data, which is text data, and attached data. And, for the text data, a mark indicating that an attached file exists, attribute data such as the attached file name and title (extracted from the attached data), and a moving image initial screen (still image) or a still image with reduced definition And the summary data is generated, and the summary data is immediately transmitted by the first wireless device 101. On the other hand, the attached file with a large amount of data is reserved and transmitted. This makes it possible to transmit data with high immediacy such as an outline of data to the other party in advance, and transmit large-capacity data with low immediacy with low power consumption.

  In order to realize the above, the data transmission reservation function unit 104 divides the transmission data input from the data input / output circuit 105 into text data and a large-capacity data body, and the above-mentioned various data are included in the text data. In addition, it has a function to generate summary data. Then, the data transmission reservation function unit 104 immediately outputs the summary data to the first wireless device 101 and reserves transmission of the data body.

  FIG. 6 is a flowchart for explaining an operation example of the radio communication terminal according to the third embodiment of the present invention. As shown in step S53, in this example, the transmission data is divided into text data and moving image data body (data 2), and the captured data, date / time, and initial still image are attached to the text data, and summary data (data 1). Data 1 is transmitted by the first wireless device 101 (step S54), and data 2 is transmitted by the second wireless device 102 (steps S55 to S63).

(Fourth embodiment)
In the fourth embodiment, an allowable transmission power value (transmission power threshold) is determined according to the attribute of data reserved for transmission. Hereinafter, this embodiment will be described in detail.

  If the amount of data reserved for transmission is relatively small, for example, if the transmission is completed in 100 μs, even if transmission is started in the neighborhood area 204 immediately below the second base station 202, transmission is not Complete immediately (see FIG. 4).

  However, if the amount of data is very large, for example, it takes about 10 seconds, transmission may not be completed in the neighborhood area 204 if transmission is started after entering the neighborhood area 204 (see FIG. 4). obtain. In this case, transmission must be interrupted, or communication must be continued while increasing the transmission power while the terminal moves away from the second base station 202. As a result, extra power is used for transmission.

  FIG. 7 is a diagram illustrating a state in which a terminal performs communication while increasing transmission power.

  In FIG. 7, the terminal starts transmission at position B. However, since the amount of transmission data is very large, transmission cannot be completed within the neighborhood area 204. The terminal continues to transmit data while increasing the transmission power even after leaving the nearby area 204, and also transmits at position D, which is near the end of the second communication area 203. As a result, large power consumption is required for data transmission.

  Therefore, in the present embodiment, the time required to transmit data to the second base station 202 is estimated based on the transmission data amount, the communication speed, and the like, and the total transmission power (power consumption) at that time is estimated. ) Is minimized by using the average walking speed of the user and the like from which position transmission should be started. Further, the transmission power (allowable transmission power) necessary for data transmission from the position to the second base station 202 is obtained. The above is repeated while changing the transmission data amount. Based on the above results, a table having the data transmission amount and the allowable transmission power as fields is created, and at the time of transmission reservation, the allowable transmission power corresponding to the data transmission amount is obtained from this table. Hereinafter, this will be specifically described with reference to FIG.

  FIG. 9 is a flowchart for explaining the operation of the wireless communication terminal according to the fourth embodiment of the present invention.

  After moving image shooting (step S71), the user makes a transmission reservation (step S72). The control circuit 115 determines the allowable transmission power Pp by associating the data amount reserved for transmission with the table 212 indicating the relationship between the transmission data amount and the allowable transmission power stored in the memory 106 in advance (step S73). .

  For example, in the case of a very short moving image with a data amount of 5 kB or less, an allowable transmission power of 10 mW is set. In this case, when the terminal enters the second communication area 203 (see FIG. 7) and the required transmission power becomes 10 mW or less (for example, enters the vicinity area 204), transmission is executed (steps S74 to S81). . Since the amount of data is as small as 5 kB or less, even if transmission is performed from the vicinity of the second base station 202, transmission is completed in a short time.

  On the other hand, in the case of a large data amount of 100 MB or more, the allowable transmission power is set to 500 mW. In this case, for example, as shown in FIG. 8, when the terminal enters an area 211 wider than the neighboring area 204 (see FIG. 7). The transmission is started (steps S74 to S81), and the transmission ends when the terminal leaves the area 211. That is, the terminal ends communication before the position D (see FIG. 7) (on the second base station 202 side). Since the required transmission power increases dramatically as it goes to the end of the second communication area 203, the power consumption of the terminal can be kept relatively small for the entire section.

(Fifth embodiment)
In the fifth embodiment, the allowable transmission power is determined based on the importance (priority) of data instead of the data amount as in the second embodiment described above. There are various types of transmission data (priority), such as data that is not immediate but that is to be sent with priority as much as possible and data that may have a delay of about one day. In the present embodiment, the allowable transmission power is determined based on this priority, and specifically, a higher allowable transmission power value is set for data with a high priority.

  In order to realize the above, for example, the priority can be input by the user to the terminal, and a table in which the priority is associated with the allowable transmission power is stored in the memory 106. The control circuit 115 confirms the priority of the transmission reservation data stored in the memory 106, and permits transmission of the transmission reservation data when the required transmission power falls below the allowable transmission power corresponding to the priority.

  FIG. 10 is a diagram for explaining the effect of the present embodiment.

  As shown in FIG. 10, if the terminal moves from A1 → A2 → G → H and does not pass through the neighborhood area 204 of the entrance 210, if the area that can be transmitted is the neighborhood area 204, the data is transmitted. Not. However, for data with high priority, data transmission is possible even when the terminal does not pass through the nearby area (minimal spot area) 204 by setting the allowable transmission power high and setting the area 213 as a transmittable area. Can be performed.

(Sixth embodiment)
Some online reservation systems make reservations on a first-come, first-served basis. In other systems, the first-come-first-served data may be meaningful, as in the case of patent prior application. In these cases, when data is transmitted from the second wireless device 102, the time from when the transmission is reserved until when the data is actually transmitted can be a problem.

In view of this, the sixth embodiment adds to the terminal a function of notifying the other terminal via the network 206 that the transmission reservation has been made when the transmission reservation is made. Thus, the reception side can recognize that the transmission reservation has been executed.

  FIG. 11 is a flowchart for explaining the operation of the wireless communication terminal according to the sixth embodiment of the present invention.

  When the transmission reservation is made by the user (steps S91 and S92), the first wireless device 101 notifies the partner terminal of the fact that the transmission reservation has been made (transmission reservation event) via the network 206 (step S93). .

  Thereafter, according to steps S94 to S101, the second wireless device 102 transmits the data reserved for transmission.

  The network 206 or the counterpart terminal performs authentication confirmation as to whether or not the received data is actually reserved for transmission. If it is correct, the network 206 or the partner terminal treats the data as having been transmitted at the time when the transmission is reserved or as having received the data at the time when the transmission reservation event is received.

  Conventionally, when the first arrival of data is significant, even if the amount of data is large, transmission must be performed by the first wireless device 101 for immediate transmission, and thus the power consumption of the terminal is large. There was a problem. On the other hand, according to the above-described embodiment, it is possible to cope with a service in which the first arrival of data is meaningful while suppressing the power consumption of the terminal.

(Seventh embodiment)
In the seventh embodiment, when the transmission start time (time at which transmission of data is desired to start at the latest) is input to the user and the transmission is not started by the second radio device 102 even at this transmission start time Is forcibly transmitting the transmission reservation data by the first wireless device 101.

  That is, in the first embodiment described above, when the second base station 202 is arranged at a place such as a front door where the terminal is likely to pass, and when the terminal passes near the second base station 202, A large amount of data was transmitted with low power. That is, assuming that the terminal passes through the vicinity of the second base station 202 with high probability, if the terminal does not pass through the vicinity of the second base station 202, the transmission reservation data is not transmitted permanently.

  The present embodiment solves that problem. When the transmission deadline of the transmission reservation data is designated as the transmission start time and transmission is not executed by the second radio device 102 even when the transmission start time is reached, Transmission is forcibly executed by the first wireless device 101.

  FIG. 12 is a flowchart for explaining the operation of the wireless communication terminal according to the seventh embodiment of the present invention.

  The user shoots a moving image (step S111), further makes a data transmission reservation and designates a transmission start time Tp (step S112). The transmission start time Tp is stored in the memory 106, for example.

  The control circuit 115 compares the current time (system time) with the transmission start time Tp, and if the current time has passed the transmission start time Tp, the control circuit 115 gives an instruction to transmit the transmission reservation data by the first radio 101. The data is output to the data processing circuit 103 (steps S113 to S116, steps S118 to S122, and step S117). Receiving this instruction, the data processing circuit 103 outputs transmission reservation data to the first wireless device 101 (step S117).

  On the other hand, if the control circuit 115 determines that the required transmission power is equal to or lower than the allowable transmission power before the current time passes the transmission start time Tp (Yes in step S120), the control circuit 115 sends the data transmission permission signal to the data processing circuit. It outputs to 103 (step S123). The data processing circuit 103 that has received the data transmission permission signal outputs the transmission reservation data to the second radio device 102 (step S123).

  As described above, according to the present embodiment, when the transmission start time of transmission reservation data is designated and transmission by second radio apparatus 102 is not performed even after the transmission start time elapses (the terminal transmits Since the transmission reservation data is forcibly transmitted by the first wireless device 101 (when it does not pass through the possible area), the transmission reservation data stays in the terminal for a long time, and the transmission is not executed. Can do.

(Eighth embodiment)
In the eighth embodiment, a user is allowed to input a scheduled transmission completion time (a time at which transmission is desired to be completed), and transmission reservation data is surely transmitted by the scheduled transmission completion time.

  Referring to FIG. 2, instead of the first base station 201 covering a wide area, the communication speed with the terminal is lower than the maximum transmission speed between the terminal and the second base station 202. There are many cases. This is because the first base station 201 is assumed to accommodate users who are far away from each other, and therefore the amount of data that can be transmitted with the same transmission power is smaller than that of the second base station 202. is there. Alternatively, since the first base station 201 provides a wide area as a service area, a large number of terminals exist in the area, and the transmission rate assigned to each terminal is reduced.

  For example, the second wireless device 102 can perform high-speed communication at 100 Mbps with the second base station 202, whereas the first wireless device 101 can communicate with the first base station 201. Can only perform low-speed communication at around 64kbps. In such a case, in the above-described seventh embodiment, when a large amount of data reserved for transmission is transmitted by the first low-speed wireless device 101, a very long time is required and the designated transmission is performed. The transmission will not be completed unless the time is very late from the start time.

  In the present embodiment, the time required for transmission is estimated at the time of transmission reservation when it is assumed that the user designates the scheduled transmission completion time at the time of transmission reservation and the transmission-reserved data is transmitted using the first wireless device 101. Then, the transmission start time is determined by subtracting the calculated time from the scheduled transmission completion time. If transmission by the second radio 102 is not started by the transmission start time, transmission is forcibly started using the first radio 101.

  FIG. 13 is a flowchart for explaining the operation of the wireless communication terminal according to the eighth embodiment of the present invention.

The user shoots a moving image (step S131), further makes a data transmission reservation and inputs a transmission completion scheduled time Te (step S132).
The control circuit 115 calculates the transmission start time Ts based on the input scheduled transmission completion time Te, the communication speed of the first wireless device 101, and the like (step S133).

  The control circuit 115 compares the current time with the transmission start time Ts, and when the current time has passed the transmission start time Tp, the data processing circuit 103 gives an instruction to transmit the transmission reservation data by the first wireless device 101. (Steps S134 to S137, Steps S139 to S143, Step S138). Receiving this instruction, the data processing circuit 103 outputs transmission reservation data to the first wireless device 101 (step S138).

  On the other hand, if the required transmission power becomes equal to or lower than the allowable transmission power before the current time passes the transmission start time Ts (Yes in step S141), the control circuit 115 sends a data transmission permission signal to the data processing circuit 103. Output (step S144). The data processing circuit 103 that has received the data transmission permission signal outputs the transmission reservation data to the second radio device 102 (step S144).

  In the above, after the start of transmission by the first wireless device 101 (step S138), if the terminal enters the transmittable area in the second communication area 203, the transmission by the first wireless device 101 is stopped, You may switch to transmission by the 2nd radio | wireless machine 102. FIG.

  As described above, according to the present embodiment, transmission of transmission reservation data can be almost certainly completed by the scheduled transmission completion time designated by the user, thereby realizing reliable and reliable data transmission.

(Ninth embodiment)
In the seventh embodiment described above, it is necessary to specify the transmission start time for each transmission reservation. In the ninth embodiment, however, the transmission start time is not specified for each transmission reservation. A predetermined time is set in advance as the transmission start time.

  As the predetermined time, for example, a time at which the user (terminal) is unlikely to pass through a transmittable area by the second wireless device 102 such as a midnight time close to the bedtime is conceivable.

  The control circuit 115 checks whether or not transmission reservation data exists at a predetermined time, and if it exists, executes transmission by the first wireless device 101.

  As described above, according to the present embodiment, when there is transmission reservation data that has not been transmitted by a predetermined time set in advance, the first wireless device 101 transmits the transmission reservation data. Therefore, it is possible to reliably transmit the transmission reservation data with a simple operation without trouble.

(Tenth embodiment)
In the seventh embodiment described above, it is necessary to specify the transmission start time for each transmission reservation.

  On the other hand, in the tenth embodiment, instead of designating the transmission start time for each transmission reservation, when a transmission reservation is made, a time after a certain time from the time when the transmission reservation is made, Set as the transmission start time. Also by this, similarly to the above-described ninth embodiment, the transmission reservation data can be reliably transmitted with only a simple operation.

(Eleventh embodiment)
In the eleventh embodiment, the user is allowed to designate a desired transmission completion time for which transmission should be completed by this time, and the allowable transmission power is set according to the remaining time until the desired transmission completion time. It is characterized by changing. Hereinafter, this embodiment will be described in detail.

  FIG. 14 is a flowchart for explaining the operation of the wireless communication terminal according to the eleventh embodiment of the present invention.

  The user shoots a moving image (step S151), further reserves transmission of data and designates a desired transmission completion time Th (step S152). The desired transmission completion time Th is stored in the memory 106, for example.

  When the terminal enters the second communication area 203 (Yes in steps S153 to S154 and S154), the control circuit 115 calculates the remaining time until the transmission completion desired time, and calculates the allowable transmission power Pm corresponding to the time. It acquires with reference to the table 213 which matched remaining time and permissible transmission power (step S156).

  When the required transmission power is less than or equal to the allowable transmission power Pm (Yes in step S159), the control unit 115 transmits the transmission reservation data by the second radio device 102 (step S161), and the required transmission power is the allowable transmission. If it is not less than the power Pm (No in step S159), the allowable transmission power Pm is calculated again (steps S160 and S156).

  As described above, by changing the allowable transmission power according to the remaining time, the area in which the second wireless device 102 can transmit is gradually adjusted (enlarged).

  For example, as shown in FIG. 10, an area that can be transmitted is transmitted from a neighboring area 204 that requires very small transmission power to an expanded area 213 that can be transmitted but requires a certain amount of power. It is controlled by the remaining time until the desired completion time.

  Specifically, when the remaining time is large, there is a high possibility that the terminal will enter the nearby area 204, and therefore transmission in the enlarged area 213 is not performed. When the remaining time decreases, it is assumed that the possibility that the terminal enters the neighboring area 204 is low, and transmission in the enlarged area 213 is executed.

  As described above, according to the present embodiment, the allowable transmission power is changed (increased) in accordance with the remaining time until the transmission completion desired time, so that transmission may be completed before the transmission completion desired time. Can be increased while reducing power consumption. Also, in the present embodiment, the second base station is higher in the case of data having high priority than in the case of constantly transmitting in the enlarged area 213 with the higher allowable transmission power for the data with higher priority as in the fifth embodiment described above. Since the opportunity to execute transmission in the vicinity of 202 increases, it can be expected that the power consumption of the terminal will be remarkably suppressed.

(Twelfth embodiment)
In the eleventh embodiment described above, the user designates the desired transmission completion time and changes the allowable transmission power according to the remaining time until the desired transmission completion time. On the other hand, in the twelfth embodiment, the allowable transmission power is changed according to the elapsed time from the reserved transmission time, not the remaining time until the desired transmission completion time.

  For example, the allowable transmission power is changed to -10 dBm up to 10 hours after transmission reservation, 0 dBm up to 30 hours after 10 hours, and +10 dBm after 30 hours. If data is retained, the probability of transmission is increased.

  As described above, according to the present embodiment, the allowable transmission power is changed (increased) according to the elapsed time after the transmission reservation, so that the data stays in the terminal more than necessary. I can stop.

(Thirteenth embodiment)
The thirteenth embodiment estimates when the data reserved for transmission is transmitted based on the past passage history (movement history) of the terminal in the second communication area 203, and uses the estimated result as the partner. The notification is made to the destination terminal. Hereinafter, this embodiment will be described in detail.

  FIG. 15 is a block diagram showing a configuration of a wireless communication terminal according to the thirteenth embodiment of the present invention.

  FIG. 16 is a diagram showing a configuration of the area passage history learning circuit 116 in FIG.

  As shown in FIG. 16, the area passage history learning circuit 116 records the passage history of the terminal in the second communication area 203 regardless of the presence or absence of transmission reservation data.

  Specifically, it learns the base station ID, passage start time, area stay time, required transmission power in that area, passage frequency, day of the week (not shown), etc. These are recorded in the learning result table 119. From this learning result table 119, it can be seen that, for example, on weekdays, it passes through the area of the base station ID XXX almost every day between 5:00 PM and 6:00 PM.

  Data necessary for creating the learning result table 119 is acquired from the communication area detection function unit 114, for example, the base station ID, the passage start time, the staying time, and the like, and the required transmission power is acquired from the required transmission power estimation circuit 108. The frequency, day of the week, etc. are calculated by the area passage history learning circuit 116 for example.

  When making a data transmission reservation, the data transmission reservation function unit 104 notifies the table control unit 118 in the area passage history learning circuit 116 that the transmission is reserved. Upon receipt of this, the table control unit 118 outputs an estimated transmission time calculation instruction to the transmission time estimation circuit 117.

  When the transmission time estimation circuit 117 receives the estimated transmission time calculation instruction, the transmission time estimation circuit 117 refers to the learning result table 119 in the area passage history learning circuit 116 and the time (and its time) that is expected to pass through the second communication area 203 next time. (Probability) is estimated, and the estimated time (and probability) is output to the control circuit 115 as shown in FIG.

  The control circuit 115 sends to the data processing circuit 103 an instruction to output the fact that the transmission reservation has been made, the reservation content (for example, the file name) and the estimated transmission time to the first wireless device 101.

  The data processing circuit 103 outputs these pieces of information to the first wireless device 101, and the first wireless device 101 notifies the partner terminal of these pieces of information via the network 206.

  The counterpart terminal knows the estimated transmission time (data acquisition expected time) together with the fact that the transmission reservation has been made.

  The counterpart terminal can know, for example, the estimated transmission time in advance, and can schedule data processing, for example.

  Further, when the destination terminal desires to acquire data at a time earlier than the estimated transmission time, it notifies the transmission source terminal via the first base station 201, and the transmission source terminal By setting the time desired by the other party as the scheduled transmission completion time using the implementation of No. 8, data can be distributed by the time desired by the other party terminal.

  In addition, when the destination terminal desires immediate data acquisition, the destination terminal notifies the source terminal via the first base station 201, and the source terminal that received the notification transmits the data reserved for transmission. Is transmitted immediately using the first wireless device 101, enabling communication with immediacy.

  In order to realize the above, the destination terminal needs to display the received transmission reservation fact and the estimated transmission time on the terminal screen, and acquire data from the user early (immediately or at a predetermined time). It is preferable to inquire whether there is.

(Fourteenth embodiment)
In the fourteenth embodiment, data transmission is scheduled based on the above-described learning history table so that the transmission power is minimized for the terminal.

  That is, if it is predicted from the learning history table that data can be transmitted with a smaller transmission power in another area immediately after the communication is not performed in that area, the transmission in that area is not performed. And execute transmission when entering another area. As a result, the terminal can be operated with less power consumption.

  For example, it is assumed that the second base station (base station X) is installed at the entrance of a room, and the terminal often passes in the immediate vicinity of the second base station. On the other hand, the second base station (base station Y) is also installed in the entrance hall, but it is assumed that the terminal passes only far from the second base station. Because of these conditions, it is assumed that the allowable transmission power is set to +10 dB for a certain reference for the area of the base station Y and -10 dBm for the area of the base station X. In the learning history table, it is assumed that +10 dB is registered for the base station X and −10 dBm is registered for the base station Y. If the learning history table predicts a route from the entrance hall to the entrance / exit of the room, transmission is not performed in the area of the base station Y (entrance hall) but data is transmitted in the area of the base station X (entrance / exit). The power consumption can be reduced by doing this.

  As a specific method for realizing this, a method of changing the allowable transmission power can be considered. That is, in the case of the above-described example, the allowable transmission power is set to a value (for example, 0 dBm) that is smaller than the transmission power value +10 dBm necessary for the entrance hall and larger than the transmission power -10 dBm necessary for the entrance / exit of the room. Data transmission can be performed at the entrance / exit of a room with low power consumption without data transmission at the entrance hall.

  The above will be described more specifically using the learning history table shown in FIG. In the above description, dBm is used as a unit of required transmission power, but in this description, mW is used as shown in the learning history table.

  For example, when the user makes a transmission reservation at around 3 pm, as shown in FIG. 16, if the transmission with the required transmission power of 20 mW is likely to be performed at 4 pm in the area of the base station ID002, the control circuit 115 Estimate based on table 119.

  “Frequency” in the learning result table 119 indicates, for example, how many times the corresponding area has been passed in the past 30 days. Therefore, the terminal passes the area of the base station ID002 with a probability of 28/30. Is expected.

  Therefore, the control circuit 115 ensures the transmission with the minimum power by setting the power slightly higher than the expected required transmission power to the allowable transmission power (considering the margin).

  For example, assume that the allowable transmission power is set to 30 mW. In this case, before passing through the area of the base station ID002, for example, even if it passes through another area (not shown) of the required transmission power of 500 mW, the terminal does not transmit, and in the area of the base station ID002, 30 mW or less Transmission with the transmission power of is reliably performed.

  If it does not pass through the area of base station ID002 (non-passing with a probability of 2/30), at the next time (PM8 o'clock), with a high probability (= 25/30), low transmission power (= 50mW) In this case, it is estimated that transmission is possible in the area of the base station ID 078, and the allowable transmission power is set to 60 mW, for example. Although it can pass through the area of the base station ID 031 around 7:00 pm, since 100 mW is required as transmission power in this area, the allowable transmission power is set to a value (60 mW) that does not transmit in the area of the base station ID 031.

  In the learning result table 119 described above, the passage history for the past 30 days is used. However, in the normal life of the user, there are many actions in units of weeks, so the passage history for each day of the week, or passage by weekday, Saturday, and Sunday. By using the history, it is possible to perform more detailed control.

  From the learning result table 119 (history information), as described above, various algorithms for determining the allowable transmission power are conceivable. For example, the remaining time until the transmission completion desired time shown in the eleventh embodiment, A method can be considered that is determined by an evaluation function using the remaining battery capacity of the terminal as an element.

(Fifteenth embodiment)
In the fourteenth embodiment described above, only the allowable transmission power is controlled in order to reduce the power consumption, but it is also possible to select an optimal transmission method (transmission rate and modulation method).

  Wireless communication systems such as IEEE802.11 (wireless LAN) have multiple transmission rates and modulation systems, select the optimal modulation system for the transmission path conditions, and perform transmission with as little error as possible and a high transmission rate. A link adaptation method (adaptive modulation method) has been studied.

  In the present embodiment, a determination circuit that determines in advance which transmission rate and modulation method is optimal in which communication area is added, and the transmission rate and modulation method determined by the determination circuit are used. To transmit the data reserved for transmission. Hereinafter, this embodiment will be described in detail.

  In general, when transmitting in a terminal, a transmission signal is amplified and transmitted by a power amplifier called a power amplifier. Here, it is assumed that in order to perform transmission at 100 Mbps within a certain second communication area, it is necessary to amplify the transmission signal to a large power. When a transmission signal is amplified to a large amount of power, the efficiency (gain) of the power amplifier is significantly reduced, and there is a possibility that the relative power consumption increases, for example, data errors due to signal waveform distortion increase.

  When it is assumed that there is a high possibility that the power consumption increases in this way, it is preferable to change the transmission rate and the modulation method to reduce the power consumption of the terminal with respect to the data transmission amount.

  Specifically, a table for selecting a transmission rate, a modulation method, and an allowable transmission power for reducing the power consumption of the terminal with respect to the amount of data transmission (for example, area, date / time, modulation method, transmission rate, and allowable transmission power are included as fields Table) is created in advance based on past communication results.

  For example, in a specific area, it is determined that communication with the transmission rate and modulation method of 100 Mbps and modulation method QAM requires a large amount of power and the power consumption rate deteriorates. If the system is 10 Mbps and modulation system BPSK and the transmission power is -10 dB at 100 Mbps transmission, the changed settings are created in a table.

  The determination circuit selects the optimum transmission scheme and allowable transmission power by associating the area to which the terminal belongs with the table, and instructs the modulator 107 of the selected transmission scheme.

  As described above, according to the present embodiment, a transmission method that reduces the power consumption of the terminal is selected, so that a system with less power consumption can be constructed.

(Sixteenth embodiment)
In the sixteenth embodiment, when transmitting reservation data, a base station or a radio control station (see FIG. 1) that bundles a plurality of base stations is connected to an upper layer (upper layer) (for example, a TPC layer or an IP layer). ) On behalf of the partner terminal (for example, the retransmission control is terminated), and after the data transmission between the terminal and the base station is completed, the data transmission is performed between the base station or the radio control station and the partner terminal. It is characterized by performing.

  FIG. 17 is a diagram simply showing a conventional data delivery method from terminal 231 to counterpart terminal (server) 233.

  Between the base station 232 and the terminal 231, retransmission control is performed in a lower layer (lower layer) (for example, a data link layer). Apart from that, end-to-end higher layer retransmission control is performed between the terminal 231 and the server 233.

  In general, a wired line is faster than a wireless line, and even when retransmission control is performed between a transmission source terminal and a counterpart terminal, the delay time of the network is a negligible ratio. However, as in the embodiment of the present invention described above, when it is necessary to immediately transmit the transmission reservation data to the network side (base station side) while passing through the second communication area 203, transmission is performed. The network delay caused by the retransmission control between the source terminal and the destination terminal cannot be ignored.

  FIG. 18 is a diagram showing an example of a data delivery method that improves this point.

  As shown in FIG. 18, the base station 232 is provided with a proxy function, and the terminal 231 performs transmission equivalent to transmitting data to the server 233 to the base station 232. In addition to performing retransmission control in the lower layer between the base station 232 and the terminal 231, retransmission control in the upper layer is also performed. The base station 232 performs data transmission with the server 233 after the communication between the terminal 231 and the base station 232 is completed. The communication between the base station 232 and the server 233 only needs to be independent of the communication between the terminal 231 and the base station 232, and the communication between the base station 232 and the server 233 is continued during the communication between the terminal 231 and the base station 232. May be performed.

  In this example, the upper layer retransmission control is performed between the terminal 231 and the base station 232, but a method in which the upper layer retransmission control is not performed between the terminal 231 and the base station 232 is also conceivable.

  That is, first, only the lower layer retransmission is performed between the terminal 231 and the base station 232, and the lower layer data is stored as a data string on the base station 232 side. When the transfer of all data reserved for transmission is completed, the base station 232 acts as a proxy for the terminal 231, and the data is transferred to and from the server 233 as if the terminal 231 is communicating with the server 233. I do. The base station 232 obtains information for the upper layer from the terminal and acts as a proxy.

  According to the present embodiment, it is possible to reduce a delay on the network due to retransmission control in an upper layer, and as a result, more transmission reservation data can be transmitted when passing through the second communication area 203.

(Seventeenth embodiment)
In the seventeenth embodiment, in addition to the sixteenth embodiment described above, a server 233 transmits a data reception completion notification to the terminal (first radio 101) via the first base station 201. Features.

  It is assumed that after the terminal 231 sends transmission reservation data to the base station 232, the terminal goes out of the second communication area 203. At this time, it is not necessarily determined that the data transmission between the base station 232 and the server 233 has been completed. Therefore, there is a possibility that data is lost when viewed from the upper layer, and data transmission to the server 233 may have failed (for example, when upper layer retransmission control is not performed between the terminal 231 and the base station 232). .

  Therefore, the server 233 notifies the terminal (first wireless device 101) of whether or not the data transmission has been normally completed via the first base station 201.

  On the other hand, the terminal retains this data without discarding it even after sending the transmission reservation data. If the transfer result is normal according to the notification from the server 233, it is assumed that the stored data has been normally transmitted to the server 233, and the terminal performs a transmission completion procedure. For example, discard the data or keep it in the sent BOX. If the transfer result is abnormal, the data is reserved for transmission again and transmitted using the second wireless device 102.

  As described above, according to the present embodiment, since the server notifies the first wireless device 101 whether or not the data is normally delivered to the server, more reliable data transmission is performed. As a result, communication quality can be improved.

  The present invention is also applicable to the next generation wireless communication system (4G system). Further, the present invention is advantageous for use in mounting a portable terminal that requires low power consumption in a device such as the current wireless LAN + PHS.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

It is a block diagram which shows roughly the structure of the radio | wireless communication terminal according to this invention. It is a figure which shows the structure of the radio | wireless communications system containing a radio | wireless communication terminal. It is a flowchart explaining an example of operation | movement of a radio | wireless communication terminal. It is a figure explaining the operation | movement by this terminal. It is a flowchart explaining an example of operation | movement of the radio | wireless communication terminal according to the 2nd Embodiment of this invention. It is a flowchart explaining the operation example of the radio | wireless communication terminal according to the 3rd Embodiment of this invention. It is a figure which shows the state in which the terminal is communicating, increasing transmission power. It is a figure which shows the state which is communicating with small electric power. It is a flowchart explaining operation | movement of the radio | wireless communication terminal according to the 4th Embodiment of this invention. It is a figure explaining the effect by the 5th Embodiment of this invention. It is a flowchart explaining operation | movement of the radio | wireless communication terminal according to the 6th Embodiment of this invention. It is a flowchart explaining operation | movement of the radio | wireless communication terminal according to the 7th Embodiment of this invention. It is a flowchart explaining operation | movement of the radio | wireless communication terminal according to the 8th Embodiment of this invention. It is a flowchart explaining the operation | movement of the radio | wireless communication terminal according to the 11th Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communication terminal according to the 13th Embodiment of this invention. It is a figure which shows the structure of the area passage log | history learning circuit in FIG. It is a figure which shows simply the method of the data delivery from the conventional terminal to the other party terminal (server). It is a figure which shows an example of the data delivery system which improved the system of FIG.

Explanation of symbols

101 first radio 102 second radio 103 data processing circuit 104 data transmission reservation function unit 105 data input / output circuit 106 memory 107 modulator 108 required transmission power estimation circuit 109 transmission power control circuit 110 tuner 112 demodulator 113 display Circuit 114 communication area detection function unit 115 control circuit 116 area passage history learning circuit 117 transmission time estimation circuit 118 table control unit 119 learning result table 200 first communication area 201 first base station 202 second base station 203 second Communication area 204 neighborhood area 205 wireless control station 206 network 208 server 209 database 212, 220 table 213 area

Claims (13)

Wireless communication is performed with the first relay station in the first communication area, and wireless communication is performed with the second relay station in the second communication area narrower than the first communication area. A wireless communication terminal capable of performing
A first transmission unit for transmitting input data to the first relay station;
A second transmitter that transmits the input data to the second relay station at a higher speed than the first transmitter;
A detection unit for detecting a communication area to which the terminal belongs;
A transmission power value calculation unit for calculating a required transmission power value necessary for transmitting data to the second relay station;
A threshold storage unit storing a transmission power threshold;
A data holding unit for storing transmission data;
A transmission destination instruction unit for instructing which of the first and second relay stations to transmit the transmission data;
When the transmission destination of the transmission data is the first relay station, when the terminal belongs to the first communication area, the transmission data is output to the first transmission unit,
On the other hand, when the transmission destination of the transmission data is the second relay station, when the terminal belongs to the second communication area, and the required transmission power value satisfies the condition according to the transmission power threshold, An output controller that outputs transmission data to the second transmitter;
A wireless communication terminal comprising:   The transmission destination instructing unit instructs the transmission data to be transmitted to the first relay station or the second relay station according to an input instruction signal or a predetermined standard. Wireless communication terminal.   The wireless communication terminal according to claim 2, wherein the transmission destination instruction unit instructs a transmission destination of the transmission data based on an attribute of the transmission data.   The transmission destination instruction unit divides the transmission data into the first transmission data and the second transmission data according to a predetermined standard, sets the transmission destination of the first transmission data as the first relay station, and The wireless communication terminal according to claim 2, wherein the transmission destination of the second transmission data is the second relay station.   The wireless communication terminal according to claim 1, further comprising a threshold value determination unit that determines the transmission power threshold value according to an attribute of the transmission data.   When the transmission destination of the transmission data is the second relay station, the output destination control unit sends a notification addressed to the destination terminal or server indicating that transmission data addressed to the destination terminal or server exists. The wireless communication terminal according to claim 1, wherein the wireless communication terminal outputs to a first transmission unit. A transmission start time determination unit for determining a transmission start time of transmission data to the second relay station based on an input from a user;
The output control unit, when not outputting the transmission data to the second transmission unit before the transmission start time, outputs the transmission data to the first transmission unit. The wireless communication terminal according to any one of 1 to 6. A transmission completion time determination unit that determines a transmission completion time to the second relay station based on an input from a user;
Based on the amount of transmission data addressed to the second relay station and the data transmission rate from the first transmitter to the first relay station, the first transmitter to the first relay station The time for transmitting the transmission data amount is calculated, and based on the calculated time and the transmission completion time, the transmission data is assumed to be transmitted from the first transmission unit until the transmission completion time. A transmission start time calculating unit that calculates a transmission start time at which transmission of the transmission data can be completed,
The output control unit outputs the transmission data to the first transmission unit when the transmission data is not output to the second transmission unit before by the transmission start time. The wireless communication terminal according to any one of 1 to 6. A transmission completion time determination unit that determines a transmission completion time to the second relay station based on an input from a user;
A threshold changing unit that changes the transmission power threshold according to the remaining time until the transmission completion time;
The wireless communication terminal according to claim 1, further comprising:   10. A threshold determination unit that receives an input of a priority for transmission data addressed to the second relay station and determines the transmission power threshold according to the input priority. The wireless communication terminal according to any one of the above. Time zone information where the terminal is estimated to pass through the communicable area in the second communication area where the required transmission power satisfies the condition based on the transmission power threshold, and the second communication area or the second base station A database storage unit storing a database associated with information for identifying
When the transmission destination of the transmission data is the second relay station, an estimation unit that estimates a time zone in which the transmission data is next transmitted to the second relay station based on the database; and Prepared,
The wireless communication terminal according to claim 1, wherein the output control unit outputs a notification addressed to a counterpart terminal including the time zone to the first transmission unit. Time zone information that the terminal is estimated to pass through the communicable area in the second communication area where the required transmission power satisfies the condition based on the transmission power threshold, the communication condition in the communicable area, and the second A database storage unit storing a database associated with specific information for specifying a communication area or the second base station;
When the transmission destination of the transmission data is the second relay station, the specific information having the communication condition that satisfies a predetermined criterion next in time series is extracted,
The output control unit may transmit the transmission before the time zone indicated in the time zone information having the communication condition, if the terminal belongs outside the second communication area indicated in the extracted specific information. The wireless communication terminal according to claim 1, wherein data is not output to the second transmission unit. A database storage unit that stores a database that associates information identifying the second base station or the second communication area, a data transmission scheme, and transmission power for executing the data transmission scheme;
A threshold setting unit that refers to the database and sets the transmission power corresponding to the second communication area to which the terminal belongs as the transmission power threshold;
Referring to the database, a data transmission method instruction unit that outputs an execution instruction of the data transmission method corresponding to the second communication area to which the terminal belongs to the second data transmission unit;
The wireless communication terminal according to claim 1, further comprising:

Images