JP2013009251A - Wireless communication device and wireless access control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce influences among three wireless communication parts having different access methods.SOLUTION: A wireless communication device has: a wireless communication part 20 performing first wireless communication by using any one channel of a first frequency band to which a plurality of channels are allocated; a wireless communication part 10 performing second wireless communication having an access method different from that of the first wireless communication by using a second frequency band lower than the first frequency band; a wireless communication part 30 performing third wireless communication having an access method different from those of the first and second wireless communications by using a third frequency band higher than the first frequency band; and a controller 40, in the case that the wireless communication part 20 and one wireless communication part of the wireless communication parts 10 and 30 conflict with each other, deciding a channel to be used by the wireless communication part 20 based on a change in a reception state before and after operation of the other wireless communication part of the wireless communication parts 10 and 30 for each of the wireless communication part 20 and the one wireless communication part.

Description

  The present invention relates to a wireless communication apparatus equipped with a plurality of wireless communication functions having different access methods.

  Patent Document 1 discloses a multimode wireless apparatus that performs communication using a plurality of different communication bands. The multi-mode wireless device includes a plurality of transceiver modules that communicate using different communication bands, and a detection module that detects the reception level of each of the transceiver modules and controls the operation of each transceiver module. And have.

  The transceiver module includes a module using a WLAN (Wireless Local Area Network) band, a module using a CDMA (Code Division Multiple Access) band, and a module using a WiMAX (Worldwide Interoperability for Microwave Access) band.

  In the above-described multimode wireless device, the detection module sets a specific transmitter / receiver module among the plurality of transmitter / receiver modules to an active state and makes the remaining transmitter / receiver modules inactive. Then, the detection module detects the reception level of the remaining transceiver modules and activates at least one of the transceiver modules whose detected reception level exceeds the threshold. Thereby, at least two transceiver modules operate simultaneously.

JP 2010-539862 A

  In the multimode wireless device described in Patent Document 1, when three transmitter / receiver modules having adjacent use frequency bands, for example, three transmitter / receiver modules of CDMA, WLAN, and WiMAX are simultaneously activated, the following is performed. Problems arise.

  When the CDMA transceiver module transmits using the 2 GHz band and the WLAN transceiver module transmits and receives using the 2.4 GHz band, a part of the 2 GHz band transmission wave on the CDMA transceiver module side ( The unnecessary transmission power outside the band affects the 2.4 GHz band on the WLAN transceiver module side, and as a result, the RF (Radio Frequency) characteristics of the WLAN transceiver module deteriorate.

  Also, when the WiMAX transceiver module performs transmission / reception using the 2.5 GHz band, since the 2.5 GHz band of the WiMAX transceiver module is very close to the 2.4 GHz band of the WLAN transceiver module, Part of the transmission wave of the module (unnecessary transmission power outside the band) affects the operating frequency band of the other module, and as a result, the RF characteristics of both modules deteriorate.

  In general, since a WLAN uses a plurality of channels, the above-described degradation of the RF characteristics becomes more significant depending on the frequency band of the channel used.

  An object of the present invention is to provide a wireless communication apparatus and a wireless access control method that can solve the above-described problem and reduce the influence between three wireless communication units having different access methods.

In order to achieve the above object, a wireless communication device of the present invention provides:
A first wireless communication unit that performs first wireless communication using any of the plurality of channels in a first frequency band to which a plurality of channels are assigned;
A second wireless communication unit that performs second wireless communication using a second frequency band lower than the first frequency band and having a different access method from the first wireless communication;
A third wireless communication unit that performs third wireless communication using a third frequency band higher than the first frequency band and having a different access method from the first and second wireless communication;
When the first wireless communication unit and one wireless communication unit of the second and third wireless communication units compete, the first wireless communication unit and the one wireless communication unit, respectively, A control unit that determines a channel used by the first wireless communication unit based on a change in a reception state before and after operation of the other wireless communication unit of the second and third wireless communication units.

The wireless access control method of the present invention
Performing first wireless communication using any of the plurality of channels in a first frequency band to which a plurality of channels are assigned;
Using a second frequency band lower than the first frequency band, performing a second wireless communication having a different access method from the first wireless communication;
Using a third frequency band higher than the first frequency band, performing a third wireless communication having a different access method from the first and second wireless communication,
When the first wireless communication and one of the second and third wireless communication compete, the second and third wireless communication respectively of the first wireless communication and the one wireless communication Determining a channel used by the first wireless communication based on a change in reception state before and after the execution of the other wireless communication of the wireless communication.

  According to the present invention, it is possible to avoid a significant deterioration of any RF characteristic of the wireless communication unit, and thus it is possible to provide a stable RF operation.

It is a block diagram which shows the structure of the radio | wireless communication apparatus which is one Embodiment of this invention. It is a figure which shows the use frequency band and transmission power distribution of each radio | wireless communication part of the radio | wireless communication apparatus shown in FIG. 3 is a flowchart showing a procedure of access control of the wireless communication apparatus shown in FIG. 1. 3 is a flowchart showing a procedure of access control of the wireless communication apparatus shown in FIG. 1. 3 is a flowchart showing a procedure of access control of the wireless communication apparatus shown in FIG. 1.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration of a wireless communication apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the wireless communication device is a mobile terminal that can perform wireless communication using a plurality of different communication bands, and the main part thereof is a wireless communication unit 10, 20. , 30 and the control unit 40.

  The wireless communication unit 10 performs data communication using the WiMAX band, and includes switches 11, 12, 13, filters 14, 15, 16, reception units (WiMAX_RX) 17, 18, and transmission unit (WiMAX_TX). 19 The WiMAX band is, for example, 2.595 GHz to 2.625 GHz, and this band is used for each of transmission and reception. In communication using WiMAX, communication in a wider range is possible at a higher speed than communication using WLAN.

  Each of the switches 11 to 13 includes first to third terminals. In the switch 11, the first terminal is connected to the antenna Ant 1, the second terminal is connected to the receiving unit 417 through the filter 14, and the third terminal is connected to the first terminal of the switch 12. . The switch 11 has a first state in which the first terminal and the second terminal are connected according to a switching signal from the control unit 40, and a second state in which the first terminal and the third terminal are connected. Switch between states.

  In the switch 12, the second terminal is connected to the transmitter 19 through the filter 15, and the third terminal is connected to the second terminal of the switch 13. In accordance with a switching signal from the control unit 40, the switch 12 includes a first state in which the first terminal and the second terminal are connected, and a second state in which the second terminal and the third terminal are connected. Switch between states.

  In the switch 13, the first terminal is connected to the antenna Ant 2, and the third terminal is connected to the receiving unit 18 through the filter 16. In accordance with a switching signal from the control unit 40, the switch 13 has a first state in which the first terminal and the second terminal are connected, and a second state in which the first terminal and the third terminal are connected. Switch between states.

  Each of the filters 14, 15, and 16 has a characteristic of allowing a WiMAX band (for example, 2.595 GHz to 2.625 GHz) to pass and blocking other bands.

  The receiving unit 17 receives the RF signal from the antenna Ant <b> 1 via the switch 11 and the filter 14. The receiver 18 receives the RF signal from the antenna Ant2 via the switch 13 and the filter 16. The transmission unit 19 transmits a signal, and the transmission signal is output from the antenna Ant1 or the antenna Ant2.

  When receiving a signal using the antenna Ant1, the control unit 40 controls the switch 11 to be in the first state. When receiving a signal using the antenna Ant2, the control unit 40 controls the switch 13 to be in the first state.

  When outputting the transmission signal from the antenna Ant1, the control unit 40 controls the switch 11 to be in the second state and controls the switch 12 to be in the first state. When outputting the transmission signal from the antenna Ant2, the control unit 40 controls the switches 12 and 13 to be in the second state.

  The wireless communication unit 20 performs data communication using the WLAN band, and includes a filter 21, a switch 22, a transmission unit (WLAN_TX) 23, and a reception unit (WLAN_RX) 24. In the WLAN band, for example, 2.412 GHz to 2.472 GHz, and this band is used for each of transmission and reception.

  The switch 22 has first to third terminals. In the switch 22, the first terminal is connected to the antenna Ant 3 via the filter 21, the second terminal is connected to the transmission unit (WLAN_TX) 23, and the third terminal is connected to the reception unit (WLAN_RX) 24. It is connected. In accordance with a switching signal from the control unit 40, the switch 22 has a first state in which the first terminal and the third terminal are connected, and a second state in which the second terminal and the third terminal are connected. Switch between states.

  The filter 21 has a characteristic of allowing a WLAN band (for example, 2.412 GHz to 2.472 GHz) to pass therethrough and blocking other bands.

  The receiving unit 24 receives the RF signal from the antenna Ant3 via the filter 21 and the switch 22. The transmission unit 23 transmits a signal, and the transmission signal is output from the antenna Ant3 via the filter 21 and the switch 22.

  When receiving a signal using the antenna Ant3, the control unit 40 controls the switch 21 to be in the first state. When outputting a transmission signal from the antenna Ant3, the control unit 40 controls the switch 21 to be in the second state.

  The radio communication unit 30 performs voice and data communication using the CDMA band, and includes a switch 31, filters 32 and 33, a transmission unit (CDMA_TX) 34, and a reception unit (CDMA_RX) 35. In the CDMA band, for example, a band of 1.925 GHz to 1.940 GHz is used for transmission, and a band of 2.115 GHz to 2.130 GHz is used for reception.

  The switch 31 has first to fourth terminals. In the switch 31, the first terminal is connected to the antenna Ant 4, the second terminal is connected to the antenna Ant 5, the third terminal is connected to the transmission unit 34 via the filter 32, and the fourth terminal is the filter 33. It is connected to the receiving unit 35 via. The switch 31 has a first state in which the first terminal and the third terminal are connected according to a switching signal from the control unit 40, and a second state in which the second terminal and the fourth terminal are connected. Switch between states.

  The filter 32 has a characteristic of allowing a transmission band (for example, 1.925 GHz to 1.940 GHz) in the CDMA band to pass and blocking other bands. The filter 33 has a characteristic of allowing a reception band (for example, 2.115 GHz to 2.130 GHz) in the CDMA band to pass and blocking other bands.

  The transmission unit 34 transmits a signal, and the transmission signal is output from the antenna Ant4 via the filter 32 and the switch 31. The receiving unit 35 receives the RF signal from the antenna Ant5 via the switch 31 and the filter 32.

  When outputting a transmission signal from the antenna Ant4, the control unit 40 controls the switch 31 to be in the first state. When receiving a signal using the antenna Ant5, the control unit 40 controls the switch 31 to be in the second state.

  In the CDMA communication, in the standby operation within the base station area, the wireless communication unit 30 performs the RF operation at regular intervals and repeats the operation so that it can be immediately connected to the base station.

  Next, operations related to access control of the mobile terminal according to the present embodiment will be described.

  FIG. 2 shows the distribution of the used frequency band and the transmission power of each of the wireless communication units 10, 20 and 30. In FIG. 2, the horizontal axis indicates the frequency.

  As shown in FIG. 2, a part of the transmission power outside the WiMAX band (low band side) of the transmission power of the wireless communication unit 10 affects the WLAN band. The influence that the transmission power outside the WiMAX band of the wireless communication unit 10 has on the WLAN band is greater on the higher band side of the WLAN band.

  Further, out of the transmission power of the wireless communication unit 30, a part of transmission power outside the CDMA band (high frequency side) affects the WLAN band. The influence that the transmission power outside the CDMA band of the wireless communication unit 30 has on the WLAN band is greater on the lower side of the WLAN band.

  Of the transmission power of the wireless communication unit 20, the transmission power outside the WLAN band affects the WiMAX band and the CDMA band. The influence of the transmission power outside the WLAN band of the wireless communication unit 20 on the WiMAX band is larger as the lower frequency side of the WiMAX band. The influence of the transmission power outside the WLAN band of the wireless communication unit 20 on the CDMA band is greater on the higher frequency side of the CDMA band.

  In the present embodiment, the WLAN band is divided into a plurality of channel frequency bands, and the wireless communication unit 20 can change the used channel in accordance with an instruction signal from the control unit 40.

  In addition, the wireless communication unit 10 performs communication using the WiMAX band, and at the time of signal reception, the value of C / N (Carrier to Noise Ratio) and received signal strength (RSSI: Received Signal Strength Indication) is controlled by the control unit 40. To supply. The wireless communication unit 20 performs communication using the WLAN band, and supplies the C / N and RSSI values to the control unit 40 when receiving a signal. The wireless communication unit 30 performs communication using the CDMA band, and supplies the C / N and RSSI values to the control unit 40 when a signal is received.

  The control unit 40 includes a storage unit 40a, and stores the C / N and RSSI values from the wireless communication units 10, 20, and 30 in the storage unit 40 for each wireless communication unit. For example, the storage unit 40a stores C / N and RSSI values in association with identification information of the wireless communication unit. Note that the storage unit 40 a may be provided separately from the control unit 40.

  In addition, the control unit 40 refers to the C / N and RSSI values of each wireless communication unit stored in the storage unit 40, and between the wireless communication unit 10 and the wireless communication unit 20 and between the wireless communication unit 30 and the wireless communication unit 20. , Access control for determining the channel of the wireless communication unit 20 is performed so that the influence of the respective out-of-band transmission power is reduced.

  Hereinafter, the access control will be specifically described.

  3A to 3C show a procedure for access control. 3A to 3C show a series of access control procedures.

  As shown in FIG. 3A, first, the control unit 40 activates the wireless communication units 10 and 20, and the wireless communication units 10 and 20 acquire the values of C / N and RSSI in each use environment. Is supplied to the control unit 40 (step 300). The control unit 40 stores the C / N and RSSI values from the wireless communication units 10 and 20 in the storage unit 40a for each wireless communication unit. In the wireless communication units 10 and 20, C / N is acquired at regular intervals, and the value of each C / N is stored in the storage unit 40a. Therefore, the control unit 40 can calculate the deterioration amount of C / N for each of the wireless communication units 10 and 20 based on the value of C / N for each fixed time stored in the storage unit 40a.

  Next, the user performs a predetermined operation on the wireless communication device, and the control unit 40 causes the wireless communication units 10 and 20 to perform a competitive operation according to the operation (step 301). In this competitive operation state, the control unit 40 operates the wireless communication unit 30, the wireless communication units 10 and 20 acquire C / N and RSSI values in each use environment, and the acquired values are sent to the control unit 40. Supply (step 302). The control unit 40 stores the C / N and RSSI values from the wireless communication units 10 and 20 in the storage unit 40a for each wireless communication unit. Also in this case, the value of C / N is acquired at regular intervals. Therefore, the control unit 40 can calculate the deterioration amount of C / N for each of the wireless communication units 10 and 20 based on the value of C / N for each fixed time stored in the storage unit 40a.

  Next, the control unit 40 determines whether or not the C / N deterioration amount of the wireless communication unit 20 acquired in step 302 is larger than the C / N deterioration amount of the wireless communication unit 20 acquired in step S300 ( Step 303). If the determination in step 303 is “NO”, the procedure shown in FIG. 3B is executed, and if “YES”, the procedure shown in FIG. 3C is executed.

  In the procedure shown in FIG. 3B, first, the control unit 40 determines whether or not the RSSI value of the wireless communication unit 20 acquired in Step 302 is higher than the RSSI value of the wireless communication unit 20 acquired in Step 300 ( Step 310).

  When the determination in step 310 is “NO”, the control unit 40 determines that the electric field is weak due to the use environment of the wireless communication unit 20, not the influence from the wireless communication unit 30, and the wireless communication unit The access control process is terminated without changing the 20 used channels.

  When the determination in step 310 is “YES”, the control unit 40 determines that the influence is from the wireless communication unit 30 and causes the wireless communication unit 20 to shift the channel used by the wireless communication unit 20 to the higher frequency side. It is determined whether or not it is possible (step 311).

  If the determination result in step 311 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20.

  When the determination result in step 311 is “YES”, the control unit 40 shifts the channel used by the wireless communication unit 20 to the high frequency side by one channel (step 312). Then, the control unit 40 sets n + 1 as the channel number to n.

  Next, the wireless communication units 10 and 20 acquire C / N and RSSI values in each use environment, and supply the acquired values to the control unit 40 (step 313). The control unit 40 stores the C / N and RSSI values from the wireless communication units 10 and 20 in the storage unit 40a for each wireless communication unit. In the wireless communication units 10 and 20, C / N is acquired at regular intervals, and the value of each C / N is stored in the storage unit 40a. Therefore, the control unit 40 can calculate the deterioration amount of C / N for each of the wireless communication units 10 and 20 based on the value of C / N for each fixed time stored in the storage unit 40a.

  Next, the control unit 40 determines whether or not the C / N deterioration amount of the wireless communication unit 10 acquired in step 313 is larger than the C / N deterioration amount of the wireless communication unit 10 acquired in step S300 ( Step 314).

  If the determination result of step 314 is “NO”, the process proceeds to step 311.

  When the determination result in step 314 is “YES”, whether or not the control unit 40 has the RSSI value of the wireless communication unit 10 acquired in step 313 higher than the RSSI value of the wireless communication unit 10 acquired in step 300. Is determined (step 315).

  If the determination result in step 315 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20.

  When the determination result in step 315 is “YES”, the controller 40 determines that the C / N degradation amount of the wireless communication unit 10 acquired in step 313 is the C / N of the wireless communication unit 20 acquired in step S302. It is determined whether or not the deterioration amount is greater than or equal to (step 316).

  If the determination result of step 316 is “NO”, the process proceeds to step 311. When the determination result in step 316 is “YES”, the controller 40 determines that the C / N degradation amount of the wireless communication unit 10 acquired in step 313 is the C / N of the wireless communication unit 20 acquired in step S302. It is determined whether it is different from the deterioration amount (step 317).

  If the determination result in step 317 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20.

  If the determination result in step 317 is “YES”, the control unit 40 causes the channel used by the wireless communication unit 20 to transition to the low frequency side by one channel, and then ends the access control process.

  In the procedure shown in FIG. 3C, first, the control unit 40 determines whether the C / N deterioration amount of the wireless communication unit 10 acquired in step 302 is larger than the C / N deterioration amount of the wireless communication unit 10 acquired in step 300. It is determined whether or not (step 321).

  If the determination result in step 321 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20.

  When the determination result in step 321 is “YES”, the control unit 40 determines whether the RSSI value of the wireless communication unit 10 acquired in step 302 is higher than the RSSI value of the wireless communication unit 10 acquired in step 300. Is determined (step 322).

  If the determination result in step 322 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20. When the determination result of step 322 is “YES”, the control unit 40 determines whether or not the channel used by the wireless communication unit 20 can be shifted to the low frequency side by one channel (step 323).

  When the determination result in step 323 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20. When the determination result of step 323 is “YES”, the control unit 40 causes the channel used by the radio communication unit 20 to transition to the low frequency side by one channel (step 324). And the control part 40 sets n-1 which is a channel number to n.

  Next, the wireless communication units 10 and 20 acquire C / N and RSSI values in the respective usage environments, and supply the acquired values to the control unit 40 (step 325). The control unit 40 stores the C / N and RSSI values from the wireless communication units 10 and 20 in the storage unit 40a for each wireless communication unit. Also in this case, the value of C / N is acquired at regular intervals. Therefore, the control unit 40 can calculate the deterioration amount of C / N for each of the wireless communication units 10 and 20 based on the value of C / N for each fixed time stored in the storage unit 40a.

  Next, the control unit 40 determines whether or not the C / N deterioration amount of the wireless communication unit 20 acquired in step 325 is larger than the C / N deterioration amount of the wireless communication unit 20 acquired in step S300 ( Step 326).

  When the determination result in step 326 is “No”, the controller 40 determines that the C / N degradation amount of the wireless communication unit 10 acquired in step 325 is the C / N of the wireless communication unit 10 acquired in step S300. It is determined whether it is larger than the deterioration amount (step 327).

  If the determination result in step 327 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20. If the determination result of step 327 is “YES”, the process proceeds to step 323.

  If the determination result in step 326 is “YES”, whether or not the control unit 40 has the RSSI value of the wireless communication unit 20 acquired in step 325 higher than the RSSI value of the wireless communication unit 20 acquired in step S300. Is determined (step 328).

  If the determination result in step 328 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20.

  When the determination result in step 328 is “YES”, the controller 40 determines that the C / N degradation amount of the wireless communication unit 20 acquired in step 325 is the C / N of the wireless communication unit 10 acquired in step S302. It is determined whether or not the deterioration amount is exceeded (step 329).

  If the determination result of step 329 is “NO”, the process proceeds to step 323. When the determination result in step 329 is “YES”, the controller 40 determines that the C / N degradation amount of the wireless communication unit 20 acquired in step 325 is the C / N of the wireless communication unit 10 acquired in step S302. It is determined whether or not the amount of deterioration is different (step 330).

  If the determination result in step 330 is “NO”, the control unit 40 ends the access control process without changing the channel used by the wireless communication unit 20. If the determination result in step 330 is “NO”, the control unit 40 causes the channel used by the wireless communication unit 20 to transition to the high frequency side by one channel, and ends the access control process.

  According to the above-described access control, the wireless communication units 10, 20, and 30 are set in an operating state, the wireless communication units 10 and 20 each acquire C / N and RSSI, and the control unit 40 considers RSSI. The channel of the wireless communication unit 20 is shifted one channel at a time to the high frequency side or the low frequency side from the C / N degradation amount. Thereby, it can avoid that the RF characteristic of either of the radio | wireless communication parts 10 and 20 deteriorates largely, and can provide the stable RF operation | movement.

  In addition, since the channel of the wireless communication unit 20 is set in consideration of the influence from the wireless communication unit 10 to the wireless communication unit 20 and the influence from the wireless communication unit 10 to the wireless communication unit 20, the wireless communication unit 10, It is not necessary to add an extra filter for preventing unnecessary transmission power outside the band in the connection line of each of the 20 antennas. Therefore, the circuit configuration of the wireless communication units 10 and 20 can be simplified, and the cost can be reduced.

  The example shown in FIGS. 3A to 3C is an operation when the wireless communication units 10 and 20 compete, but is not limited thereto. For example, the wireless communication units 20 and 30 may compete at step 301 in FIG. 3A. In this case, the control unit 40 controls the channel of the radio communication unit 20 based on the C / N and RSSI of the radio communication units 20 and 30. This control can be explained by replacing the wireless communication unit 10 with the wireless communication unit 30 in the procedure shown in FIGS. 3A to 3C.

(Other embodiments)
A wireless communication apparatus according to another embodiment of the present invention provides a first wireless communication that performs a first wireless communication using any one of the plurality of channels in a first frequency band to which a plurality of channels are assigned. And a second wireless communication unit that performs second wireless communication using a second frequency band lower than the first frequency band and having a different access method from the first wireless communication, A third wireless communication unit that performs third wireless communication using a third frequency band higher than the first frequency band and having a different access method from the first and second wireless communication; When the first wireless communication unit and one wireless communication unit of the second and third wireless communication units compete with each other, the first and second wireless communication units, respectively, Operation before and operation of the other wireless communication unit of the third wireless communication unit Based on the change in the reception state at, and a control unit for determining a channel in which the first radio communication unit is used.

  In the above configuration, the first wireless communication unit and the one wireless communication unit respectively acquire the carrier-to-noise ratio and the received electric field strength before and after the operation of the other wireless communication unit, and the control unit The channel used by the first wireless communication unit is changed to a high frequency side or a channel used by the first wireless communication unit according to a change in the carrier-to-noise ratio and a change in received electric field strength in each of the first wireless communication unit and one of the wireless communication units. You may shift to the low frequency side.

  The wireless communication configuration of each embodiment described above is an example of the present invention, and the configuration and operation thereof can be changed within a range that can be understood by those skilled in the art.

  For example, as an access method (or communication standard), a combination other than CDMA, WLAN, and WiMAX, for example, a combination of WCDMA, WLAN, and WiMAX may be used. Also, combinations of access methods (or communication standards) other than these can be used. For example, the present invention is also applicable to wireless communication conforming to a standard such as LTE (Long Term Evolution).

  In addition, the present invention can be applied to all apparatuses that perform a plurality of wireless communications with different access methods. For example, the present invention can be applied to a mobile phone, a smartphone, a game machine, a tablet terminal, a personal computer (including a desktop type and a notebook type), and the like.

10, 20, 30 Wireless communication unit 11-13, 22, 31 Switch 14-16, 21, 32, 33 Filter 17, 18, 24, 35 Reception unit 19, 23, 34 Transmission unit 40 Control unit 40a Storage unit Ant1 5 Antenna

Claims (4)

A first wireless communication unit that performs first wireless communication using any of the plurality of channels in a first frequency band to which a plurality of channels are assigned;
A second wireless communication unit that performs second wireless communication using a second frequency band lower than the first frequency band and having a different access method from the first wireless communication;
A third wireless communication unit that performs third wireless communication using a third frequency band higher than the first frequency band and having a different access method from the first and second wireless communication;
When the first wireless communication unit and one wireless communication unit of the second and third wireless communication units compete, the first wireless communication unit and the one wireless communication unit, respectively, A control unit that determines a channel used by the first wireless communication unit based on a change in reception state before and after operation of the other wireless communication unit of the second and third wireless communication units, Wireless communication device. The first wireless communication unit and one wireless communication unit respectively obtain the carrier-to-noise ratio and the received electric field strength before and after the operation of the other wireless communication unit,
The control unit uses a channel used by the first radio communication unit according to a change in the carrier-to-noise ratio and a change in the received electric field strength in each of the first radio communication unit and one radio communication unit. The wireless communication device according to claim 1, wherein the shift is shifted to a high frequency side or a low frequency side.   The wireless communication apparatus according to claim 1 or 2, wherein the first wireless communication is a WLAN, the second wireless communication is CDMA, and the third wireless communication is WiMAX. Performing first wireless communication using any of the plurality of channels in a first frequency band to which a plurality of channels are assigned;
Using a second frequency band lower than the first frequency band, performing a second wireless communication having a different access method from the first wireless communication;
Using a third frequency band higher than the first frequency band, performing a third wireless communication having a different access method from the first and second wireless communication,
When the first wireless communication and one of the second and third wireless communication compete, the second and third wireless communication respectively of the first wireless communication and the one wireless communication A radio access control method for determining a channel used by the first radio communication based on a change in a reception state before and after the execution of the other radio communication of the radio communication.

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