JP4245311B2 - Electronic device and communication control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic apparatus having wireless communication means, and more particularly to a method for controlling wireless communication means.
[0002]
[Prior art]
In recent years, with the development of network environments, personal computers (hereinafter referred to as personal computers) have made remarkable progress in data communication by wireless communication and network construction.
[0003]
In particular, a personal computer equipped with a wireless LAN that replaces a wired LAN and a Bluetooth technology that is a short-range wireless communication technology has been realized.
[0004]
In a wireless communication device built in an information processing apparatus such as a personal computer, a dedicated antenna is provided in order to propagate radio waves more efficiently.
[0005]
In particular, in recent years, wireless LAN has become widespread as a network that replaces wired LAN, and Bluetooth (hereinafter referred to as BT) is becoming widespread as a connection interface between a personal computer and peripheral devices.
[0006]
Such a wireless LAN and BT mounted on a single personal computer are also widely used. In such a model, two antennas are arranged in a diversity system as a wireless LAN antenna. Has a single antenna.
[0007]
[Problems to be solved by the invention]
In the above prior art, when wireless LAN and BT are used at the same time, when radio waves of the same frequency are used, or when signals have harmonic components, they interfere with each other and add noise to received data. There was a problem that the reliability of the data decreased or the error rate increased.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, according to the first aspect of the present invention, the first wireless communication module, the second wireless communication module different from the first wireless communication module, and the first wireless communication module are connected. A first antenna used for transmission / reception of a first wireless communication signal, a second antenna connected to the second wireless communication module and used for transmission / reception of a second wireless communication signal, and the second antenna A third antenna used for receiving a second wireless communication signal and received by the second antenna.The secondWireless communication signalSignal other thanGain and received by the third antennaThe secondWireless communication signalSignal other thanAnd the second radio communication signal using either one of the second antenna and the third antenna having a small gain of a signal other than the second radio communication signal. And a control means for receiving the signal.
[0009]
However, in the above prior art, the output power is controlled according to whether or not another wireless communication device is used, and only one wireless communication means is in use, and the other wireless communication means There is a problem in that control is judged and flexible transmission / reception control cannot be performed.
[0010]
In order to solve the above problems, in the present invention, in an electronic apparatus having a plurality of wireless communication means, an electronic apparatus capable of reducing data interference transmitted and received by each wireless communication means and increasing data reliability. It is another object of the present invention to provide a communication control method.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, in the invention according to claim 1, the first wireless communication means, the second wireless communication means different from the first wireless communication means, and the first wireless communication means are connected. Connected to the second wireless communication means, the second antenna arranged with a first distance from the first antenna, and the second wireless communication means And when the first antenna and the third antenna arranged with a second distance shorter than the first distance and the first and second wireless communication means perform wireless communication, The first wireless communication means performs wireless communication using a first antenna, and the second wireless communication means performs wireless communication using only the second antenna.
[0014]
With such a configuration, in an electronic apparatus having a plurality of wireless communication means, it is possible to provide an electronic apparatus capable of reducing data interference transmitted and received by each wireless communication means and increasing data reliability. It becomes.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments according to the present invention will be described below with reference to the drawings.
[0020]
FIG. 1 is a hardware configuration diagram of an electronic device according to the first embodiment.
[0021]
In the present embodiment, a notebook personal computer will be described as an example of an electronic device, but the present invention is not limited to this.
[0022]
The personal computer 1 is an electronic device capable of performing IEEE802.11b wireless communication and Bluetooth (hereinafter referred to as BT) wireless communication.
[0023]
The IEEE802.11b system (hereinafter referred to as wireless LAN) is one of the wireless communication standards using the ISM (Industry Science Medical) band of 2.4 GHz band (2.4000 to 2.4835 GHz), and is a spread spectrum system. As described above, it is possible to perform communication at a maximum communication speed of 11 Mbps using a direct spreading method (DSSS: Direct Sequence Spread Spectrum). In this wireless LAN, the 2.4 GHz band is divided into 14 channels (different depending on the country), and communication is performed by setting one of the 14 channels. Since the occupied band of this channel is 22 MHz, which is ± 11 MHz from the center frequency, interference is given to adjacent channels. Therefore, the channel interval is usually set to a frequency that is separated by 25 MHz or more. In addition, since the wireless LAN uses CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) method, check if there is another carrier on the network and if no one is communicating, you can communicate yourself This avoids transmission conflicts. Therefore, when there is another carrier, it waits for transmission.
[0024]
BT is a short-range wireless communication standard that realizes wireless communication within 10 m (maximum 100 m) using an ISM (Industry Science Medical) band in the 2.4 GHz band (2.4000 to 2.4835 GHz). is there. In Bluetooth, a frequency hopping method (FHSS: Frequency Hopping Spread Spectrum) is used as a spread spectrum method, and up to eight devices are connected as one group (piconet) by a time division multiplexing method at a maximum communication speed of 1 Mbps. Is possible. The BT divides the frequency in the 2.4 GHz band into 79 channels having a frequency bandwidth of 1 MHz, and performs communication by switching the communication channel 1600 times per second. Since this channel is selected at random, it does not depend on a specific frequency and is said to be excellent in secrecy. BT is divided into three classes (classes 1 to 3) according to transmission output. In class 1, the maximum output is 20 dBm, in class 2, the maximum output is 4 dBm, and in class 3, the maximum output is 0 dBm.
[0025]
The inside of the personal computer 1 is composed of devices necessary for the normal personal computer 1 to operate. The CPU 3 for controlling the personal computer 1 and the first bridge circuit 4 are connected by a CPU local bus having a 64-bit data bus, and the connection between the first bridge circuit 4 and the main memory 5 is a memory bus. Connected through. The first bridge circuit 4 and the second bridge circuit 6 are connected by a high-speed bus 7 having a 32-bit data bus. Connected to the high-speed bus 7 is a wireless LAN module 8 that performs modulation / demodulation processing of a wireless signal in accordance with the IEEE 802.11b system. The BT module 10 is connected to the second bridge circuit 7 via a USB (Universal Serial Bus) 9. Further, the BIOS-ROM 12 is connected to the low-speed bus 11 extending from the second bridge circuit 7.
[0026]
The CPU 3 executes operation control and data processing of the entire PC.
[0027]
The main memory 5 is a memory device that stores an operating system 13, a BIOS program 14, an application program 15 to be executed, processing data, and the like, and includes a plurality of DRAMs.
[0028]
The first bridge circuit 4 is a bridge LSI that connects the CPU local bus and the high-speed bus 7, and functions as one of the bus master devices of the high-speed bus 7. The first bridge circuit 4 has a function of converting a bus width including data and an address between the CPU local bus and the high-speed bus 7, a function of controlling access to the main memory 5 via the memory bus, and the like. Have.
[0029]
The high-speed bus 7 is a clock synchronous input / output bus, and all cycles on the high-speed bus 7 are performed in synchronization with the high-speed bus clock. The high-speed bus 7 has an address / data bus used in a time division manner.
[0030]
A wireless LAN module 8 is connected to the high-speed bus 7. The wireless LAN module 8 performs signal modulation / demodulation processing of wireless data in conformity with IEEE802.11b, and corresponds to a diversity communication system. . The wireless LAN module 8 is connected to diversity antennas 16 and 17 serving as radio signal transmission / reception interfaces via a coaxial cable.
[0031]
In the diversity system, one antenna is an antenna that performs transmission and reception (main antenna), and the other antenna is an antenna that performs only reception (sub-antenna). Usually, a main antenna is used for data transmission, and a main antenna or a sub-antenna is used while switching the higher reception level to receive data, thereby minimizing fluctuations in the level of received radio waves. In this example, the main antenna is the diversity antenna 16 and the sub-antenna is the diversity antenna 17, but this may be reversed.
[0032]
The second bridge circuit 6 is a bridge LSI that connects the high-speed bus 7 and the low-speed bus 11, and performs bus conversion between the high-speed bus 7 and the low-speed bus 11. A USB controller 18 is incorporated. The USB controller 18 is for controlling serial data transfer, and controls signal transmission / reception with the BT module 10 connected via the USB 11.
[0033]
The BT module 10 performs data modulation, demodulation, frequency hopping control, and the like in accordance with the BT communication method. The BT module 10 is connected to an antenna 19 serving as a radio signal transmission / reception interface via a coaxial cable.
[0034]
With the above system configuration, wireless communication based on BT or IEEE 802.11b can be performed with an external wireless communication device. In the present embodiment, inverted F antennas are used as the diversity antennas 16 and 17 and the antenna 19. The inverted F antenna is a plate antenna that uses the resonance of a metal plate used for the top plate.
[0035]
The low-speed bus 11 is connected to the BIOS-ROM 12.
[0036]
The BIOS-ROM 12 is a program that systematizes a function execution routine for accessing various hardware in the personal computer, and is configured by a flash ROM so that the program can be rewritten. When the personal computer 1 is started, various hardware is initialized, and input / output control to various hardware is performed even while the OS is running. When the personal computer 1 is started, a part of the BIOS program is copied to the main memory 5 and performs input / output control of the personal computer 1.
[0037]
A control unit 20 is connected between the wireless LAN module 8 and the BT module 10. The control unit 20 monitors each output power, performs output power control and timing control of the wireless LAN module 8, and performs output power control and timing control of the BT module 10.
[0038]
Next, FIG. 2 shows a perspective view of the appearance of the personal computer described above.
[0039]
The personal computer 1 includes a main body case 21, a display unit case 22, an LCD panel 23, and a keyboard 24. The main body case 21 is provided with a keyboard 24 on its upper surface. The main body case 21 and the display unit case 22 are connected by a hinge portion 25 so as to be rotatable. The display unit case 22 supports the periphery of the LCD panel 23 so that the display area of the LCD panel 23 is visible. The display unit case 22 can be rotated in the direction of the arrow AB through the hinge unit 25, and can be rotated between a closed position that covers the keyboard 24 and an open position that enables the keyboard 24 to be used. .
[0040]
The latch 26 is engaged with the engagement hole 27 provided in the main body case 21 to lock the main body case 21 and the display case 22 when the display case 22 is rotated in the arrow A direction. It is.
[0041]
In addition, a diversity antenna (main antenna 16 and sub-antenna 17) used in a wireless LAN (IEEE802.11) and an antenna 16 used in a BT are provided on the upper side supporting the LCD panel 23 of the display unit case 22. Is provided.
[0042]
Ideally, the wireless antenna should be provided at a high position in order to improve its reception sensitivity. Therefore, in consideration of the situation where the PC 1 is used, the diversity antennas 16 and 17 and the antenna 19 are provided on the upper portion of the display unit case 22 that is at a high position when used.
[0043]
Each antenna passes through the back surface of the LCD panel 23 by a coaxial cable (indicated by a dotted line in the figure), and is connected to a wireless LAN module provided on a circuit board (not shown) in the main body case 21 via the hinge portion 25. 8 and BT module 10, respectively. Diversity antennas 16 and 17 used in the diversity system are generally arranged such that the arrangement feeling of the two antennas is 3 / 4λ (λ: wavelength) or more. And a distance of 3 / 4λ or more.
[0044]
In such an arrangement, the diversity antennas 16 and 17 used in the wireless LAN and the BT antenna 19 are arranged close to each other. In addition, since the wireless LAN and the BT use the same frequency band, the radio waves often interfere with each other, which may cause a data transmission / reception error. Therefore, in the first embodiment, when data transmission / reception is performed by BT, among the diversity antennas 16 and 17 used in the wireless LAN, the antenna closer to the BT antenna 19 is disabled. This reduces data reception errors.
[0045]
FIG. 3 shows a configuration diagram of the wireless LAN module and the BT module according to the first embodiment.
[0046]
In the wireless LAN module 8, a modulation / demodulation unit 31 that modulates / demodulates transmission / reception data and a switch unit 32 that switches between the main antenna 16 and the sub-antenna 17 are provided. Normally, the diversity antenna receives and uses the main antenna 16 and the sub-antenna 17 having the better gain. At this time, the switch unit 32 is switched between the main antenna side S1 and the sub antenna side S2 every 2 to 3 seconds. For example, after switching the switch unit 32 from the main antenna side S1 to the sub antenna side S2, the gain of the received signal acquired by the sub antenna 17 is detected, and the gain is lower than before switching (main antenna side S1). The switch unit 32 is immediately switched to the main antenna S1. On the other hand, if a gain can be obtained before switching, the switch unit 32 continues reception on the sub-antenna side S2 for about 3 seconds. A few seconds later, after switching the switch to the main antenna S1, the same control is performed again by determining the gain.
[0047]
In the present embodiment, when wireless communication is performed by the BT module 20, control is performed so that only the antenna farther from the BT antenna 19 is used. Here, the switch unit 32 is connected to the main antenna side S1, and is not connected to the sub antenna side S2.
[0048]
Next, FIG. 4 shows a flowchart of antenna switching control according to the first embodiment.
[0049]
The BT module 10 sends a signal indicating that it is operating to the control unit 20 when performing transmission / reception (step S101). For example, a 1-bit signal “1” or “0” may indicate operation or non-operation. A 2-bit “00”, “01”, or “10” indicates non-operation, transmission, or reception. You may make it show.
[0050]
When the control unit 20 receives a signal (including transmission and reception) indicating this operation (step S102), the control unit 20 sends a signal instructing antenna switching to the wireless LAN module 8 to the wireless LAN module 8 (step S102). S103).
[0051]
When receiving the signal from the control unit 20, the wireless LAN module 8 switches the switch 32 to the main antenna side S1 (step S104).
[0052]
As described above, in the first embodiment, when wireless communication by BT is performed by the BT module 10, reception of wireless LAN is performed by disabling the antenna closer to the BT antenna of the diversity antenna. It is possible to reduce errors.
[0053]
Next, the second embodiment will be described. In the second embodiment, the wireless LAN module is provided with a detection unit capable of detecting BT radio waves, and the antenna that is susceptible to the BT radio waves is disabled.
[0054]
Since the hardware configuration of the electronic device of the second embodiment is the same as that of the first embodiment described above, the description is omitted and FIGS. 1 to 2 are used.
[0055]
FIG. 5 shows a configuration diagram of the wireless LAN module and the BT module according to the second embodiment.
[0056]
This is almost the same as FIG. 3 shown in the first embodiment, but a BT signal detection unit 41 for detecting a BT signal is provided in the modem unit 31. This detects whether or not a BT signal is included from signals received by the main antenna 16 or the sub-antenna 17.
[0057]
Next, FIG. 6 shows a simplified spectrum diagram of the frequency of the signals of the wireless LAN and BT.
[0058]
In the figure, the vertical axis represents power (gain), and the horizontal axis represents frequency.
[0059]
In FIG. 6, the region indicated on the parabola is the spectrum of the wireless LAN. In the wireless LAN, the frequency of 2.4000 to 2.4835 GHz is divided into 14 channels as described above, and one of the 14 channels is selected and used for wireless communication. Is done.
[0060]
On the other hand, the signal spectrum of BT is shown by a bar-shaped diagonal line. Although a number of spectra are shown in the figure, they are described for the sake of convenience and only one spectrum appears during a time interval of 625 μs (1/1600 seconds).
[0061]
Therefore, there is a time zone in which the frequency overlaps between the communication frequency of the wireless LAN and the communication frequency used in the BT. For this reason, a BT signal spectrum is generated in a channel selected for wireless LAN communication, and a BT signal may be received by the wireless LAN module. This is a noise component when viewed from the wireless LAN side. . In addition, the radio waves that are affected when communicating via wireless LAN are not necessarily limited to the BT signals that are emitted from the BT module that they own, but may also be affected by the radio waves emitted from nearby devices. Conceivable. Therefore, in this embodiment, the gains of communication signals other than the wireless AN received by any one of the diversity antennas used in the wireless LAN are compared, and are not affected by other wireless communication signals (other wireless communication signals). The antenna with the smaller signal gain is used as the receiving antenna.
[0062]
Next, FIG. 7 shows a flowchart of antenna control according to the second embodiment.
[0063]
First, the switch 32 is switched to the main antenna side S1 to receive a radio signal (step S201). A BT signal provided in the modem unit 31 is detected from the signal received via the main antenna 16 (step S202). Next, the switch 32 is switched to the sub-antenna side S2 (step S203) to receive a radio signal (step S204). From the signal received via the sub-antenna 17, the signal of the BT provided in the modem unit 31 is detected. (Step S205).
The BT signals received by the main antenna 16 and the sub-antenna 17 are compared, and an antenna with less detection of BT signals is selected.
[0064]
Next, a modification of the second embodiment is shown in FIG. FIG. 8 shows a configuration diagram of a wireless LAN module and a BT module according to a modification of the second embodiment.
[0065]
In this modification, the signal received from the switch of the wireless LAN module 8 is transmitted to the BT module 10 via the signal line 42, the BT signal is detected by the BT module 10, and the control unit 20 is detected according to the signal. A control signal is issued to switch the switch 32 in the wireless LAN module 8.
[0066]
FIG. 9 shows a flowchart of antenna switching control according to a modification of the second embodiment.
[0067]
First, the switch 32 is switched to the main antenna side S1, and a radio signal is received by the main antenna 16 (step S301). The received signal is transmitted to the BT module 10 via the signal line 41. The BT module 10 extracts the BT signal component from the received signal and transmits the gain to the control unit 20 (step S302). The control unit 20 stores the gain of the BT signal of the signal received by the main antenna 16 (step S303).
[0068]
Next, the switch 32 is switched to the sub antenna S2 side (step S304), and a signal obtained by the sub antenna 17 is received (step S305). The received signal is transmitted to the BT module 10 via the signal line 41. The BT module 10 extracts the BT signal component from the received signal and transmits the gain to the control unit 20 (step S306). In the control unit 20, the control unit 20 stores the gain of the BT signal of the signal received by the main antenna 16 (step S307).
[0069]
The gain of the signal received by the main antenna 16 is compared with the gain of the signal received by the sub antenna 17 (step S309). When the gain obtained by the main antenna 16 is larger than the gain obtained by the sub-antenna 17 (YES in step S309), it is determined that the BT signal received by the main antenna 16 is large, and the switch 32 is switched to the S2 side. A signal is sent to the wireless LAN module 8 (step S310). On the other hand, when the gain obtained by the main antenna 16 is smaller than the gain obtained by the sub-antenna 17 (NO in step S309), it is determined that the BT signal received by the sub-antenna 17 is large, and the switch 32 is moved to the S1 side. A control signal to be switched is sent to the wireless LAN module 8 (step S311). The switching signal of the switch 32 at this time may be a 1-bit 0/1 signal.
[0070]
When receiving the control signal for switching the switch 32 to the S2 side from the control unit 20, the wireless LAN module 8 switches the switch 32 to the S2 side and receives the radio signal using the sub-antenna 17 (step S312). Further, when a control signal for switching the switch 32 to the S1 side is received from the control unit 20, the switch 32 is switched to the S1 side, and a radio signal is received using the main antenna 16 (step S313).
[0071]
As described above, in the second embodiment, the gain of communication signals other than the wireless LAN received by any one of the diversity antennas used in the wireless LAN is compared, and the influence from other wireless communication signals is small. By using the other antenna (the gain of other wireless signals is small) as a receiving antenna, it is possible to improve the efficiency of signals received by the wireless LAN.
[0072]
Next, a third embodiment will be described.
[0073]
In the third embodiment, transmission of wireless LAN and BT is switched in a time division manner.
[0074]
The hardware configuration of the personal computer is almost the same as that of the first embodiment.
[0075]
FIG. 10 shows a configuration diagram of a wireless LAN module and a BT module according to the third embodiment.
[0076]
In the BT module 10, an output control unit 45 for controlling the transmission output power of the BT is provided. The output control unit 45 can amplify and reduce the transmission power of the BT. For example, the output control unit 45 can switch between classes 1 to 3 defined by the BT.
[0077]
Next, FIG. 11 shows a control flowchart of the wireless LAN module and the BT module.
[0078]
First, it is determined whether the wireless LAN module 8 is transmitting or receiving data packets while the wireless LAN module 8 is operating (step S401). Here, reception of a beacon frame or the like is not included. If the wireless LAN module 8 determines that the data packet is being transmitted or received (YES in step S401), a signal indicating that the wireless LAN module 8 is performing packet communication is sent to the control unit 20. (Step S402). When receiving the operating signal indicating that the wireless LAN is operating (step S403), the control unit 20 transmits a signal for reducing the power to the BT module 10 (step S404). The BT module 10 controls the output control unit 45 to reduce the transmission output. Here, for example, when transmission is performed in class 1, control of class change may be performed such as dropping to class 2 by receiving this power reduction signal.
[0079]
On the other hand, when the wireless LAN module 8 is not transmitting / receiving packets (NO in step S401), the BT module 10 is operated with normal power output (step S406).
[0080]
In addition, when the class is lowered by the transmission output control of the BT module 10 described above and there are many errors in the received data of the wireless LAN, the class may be further lowered.
[0081]
Moreover, even when normal transmission is performed or when the transmission output is reduced, the process returns to step S401 again, and the output control process is repeated.
[0082]
FIG. 12 is a schematic diagram of a data communication packet according to the third embodiment.
[0083]
The vertical axis represents power, and the horizontal axis represents time. With the control described with reference to FIG. 11, it is possible to reduce the transmission output of BT communication data when communication by wireless LAN is performed. The wireless LAN module can be either receiving or transmitting.
[0084]
Then, the modification of 3rd Embodiment is shown. In this modification, the transmission of the BT module is stopped when the wireless LAN is operating.
[0085]
The hardware configuration is the same as that shown in FIG. FIG. 13 shows a control flowchart of the wireless LAN module and the BT module according to a modification of the third embodiment.
[0086]
First, it is determined whether the wireless LAN module 8 is transmitting or receiving data packets while the wireless LAN module 8 is operating (step S501). Here, reception of a beacon frame or the like is not included. If the wireless LAN module 8 determines that a data packet is being transmitted or received (YES in step S501), a signal indicating that the wireless LAN module 8 is performing packet communication is transmitted to the control unit 20. (Step S502). When receiving an in-operation signal indicating that the wireless LAN is operating (step S503), the control unit 20 transmits a signal for stopping transmission to the BT module 10 (step S504). The BT module 10 receiving this signal from the control unit 20 stops data transmission.
[0087]
On the other hand, when the wireless LAN module 8 is not used (NO in step S501), the BT module 10 is operated with a normal power output (step S506).
[0088]
Whether the transmission is performed or the transmission is stopped, the process returns to step S501 and the process is repeated.
[0089]
FIG. 14 is a schematic diagram of a data communication packet according to a modification of the third embodiment.
[0090]
The vertical axis represents power, and the horizontal axis represents time. According to the control described with reference to FIG. 12, the BT module stops transmission when wireless LAN communication is performed. If there is no wireless LAN communication, BT is used for communication. Wireless LAN module communication data may be received or transmitted.
[0091]
As described above, in the third embodiment, while using the wireless LAN module, by reducing the transmission output of the BT or stopping the transmission, the reception data of the wireless LAN module 8 can be received from the communication data of the BT. It is possible to reduce interference.
[0092]
Subsequently, a fourth embodiment will be described. In the fourth embodiment, the channel used by the wireless LAN is not used by the BT module, so that interference with the wireless LAN is reduced. FIG. 15 shows a configuration diagram of a wireless LAN module and a BT module according to the fourth embodiment.
[0093]
The wireless LAN module 8 and the BT module 10 are connected by a serial signal line 51. The serial signal line 51 transmits and receives state information (whether transmission / reception is performed) and control information between the wireless LAN module 8 and the BT module.
[0094]
Next, FIG. 16 shows a control flowchart of the wireless LAN module and the BT module according to the fourth embodiment.
[0095]
First, consider a state in which the wireless LAN module 8 is operating. When the BT module 10 starts transmission (step S601), the wireless LAN module 8 is notified via the serial signal line 51 that transmission starts (step S602).
[0096]
The wireless LAN module 8 that has received the transmission start signal from the BT module 10 notifies the BT module 10 of the channel number currently in use (step S603).
[0097]
The BT module 10 performs wireless communication by excluding the radio frequency band in use by the wireless LAN module 8 based on the information on the channel number that the wireless LAN module 8 is currently using. For example, when the wireless LAN module 8 uses 2.416 to 2.438 GHz centered on 2.427 GHz, the BT module 10 uses a frequency excluding the frequency band of 2.416 to 2.438 GHz. Frequency hopping.
[0098]
Next, a case where the BT module is in a communication state and the wireless LAN starts communication will be described with reference to FIG. FIG. 17 shows a control flowchart of the wireless LAN module and the BT module according to the fourth embodiment.
[0099]
First, the BT module 10 is in a communication state (step S701). In this state, when the wireless LAN starts communication (YES in step S702), the channel used by the wireless LAN module 8 for communication is notified to the BT module 10 via the serial signal line 51 (step S703).
[0100]
Based on the channel number information used by the wireless LAN module 8, the BT module 10 switches to wireless communication that excludes the wireless frequency band used by the wireless LAN module 8 (step S704). For example, when the wireless LAN module 8 uses 2.416 to 2.438 GHz centered on 2.427 GHz, the BT module 10 uses a frequency excluding the frequency band of 2.416 to 2.438 GHz. Frequency hopping.
[0101]
FIG. 18 shows a simplified spectrum diagram of the frequency of the signals of the wireless LAN and the BT according to the fourth embodiment. As shown in the drawing, in the frequency spectrum range used by the wireless LAN module 8, the BT module 10 does not perform hopping but performs frequency hopping in a band excluding the wireless LAN channel.
[0102]
In the above description, a serial signal line is used as a signal line for connecting the wireless LAN module 8 and the BT module 10, but the present invention is not limited to this, and a parallel signal line may be used.
[0103]
As described above, in the fourth embodiment, it is possible to reduce interference with the frequency used in the wireless LAN by performing communication with the BT module except for the frequency band used by the wireless LAN module. And interference of communication data between the BT module 10 can be reduced.
[0104]
As described above in detail, according to the present invention, in an electronic device having a wireless communication function, an electronic device capable of reducing transmission / reception signals by wireless communication, reducing interference from other wireless signals, and improving data reliability. It is possible to provide.
[0105]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. Moreover, the combination of several embodiment mentioned above is also possible.
[0106]
【The invention's effect】
According to the invention described in detail above, in an electronic device having a wireless communication function, an electronic device capable of reducing transmission / reception signals by wireless communication from other wireless signals and improving data reliability. Is possible.
[Brief description of the drawings]
FIG. 1 is a hardware configuration diagram of an electronic device according to a first embodiment.
FIG. 2 is an external perspective view of the electronic apparatus according to the first embodiment.
FIG. 3 is a configuration diagram of a wireless LAN module and a BT module according to the first embodiment.
FIG. 4 is a flowchart of antenna switching control according to the first embodiment;
FIG. 5 is a configuration diagram of a wireless LAN module and a BT module according to a second embodiment.
FIG. 6 is a simplified spectrum diagram of the frequency of signals of wireless LAN and BT.
FIG. 7 is a flowchart of antenna control according to the second embodiment.
FIG. 8 is a configuration diagram of a wireless LAN module and a BT module according to a modification of the second embodiment.
FIG. 9 is a flowchart of antenna switching control according to a modification of the second embodiment.
FIG. 10 is a configuration diagram of a wireless LAN module and a BT module according to a third embodiment.
FIG. 11 is a hardware configuration diagram of the electronic device according to the first embodiment.
FIG. 12 is a schematic diagram of a packet for data communication according to the third embodiment.
FIG. 13 is a control flowchart of a wireless LAN module and a BT module according to a modification of the third embodiment.
FIG. 14 is a schematic diagram of a packet for data communication according to a modification of the third embodiment.
FIG. 15 is a configuration diagram of a wireless LAN module and a BT module according to a fourth embodiment.
FIG. 16 is a control flowchart of a wireless LAN module and a BT module according to the fourth embodiment.
FIG. 17 is a control flowchart of a wireless LAN module and a BT module according to the fourth embodiment.
FIG. 18 is a simplified spectrum diagram of frequency of signals of wireless LAN and BT according to a modification of the fourth embodiment.
[Explanation of symbols]
1 ... PC
3 ... CPU
4 ... 1st bridge circuit
5 ... Main memory
6 ... Second bridge circuit
7 ... 1st bus
8 ... Wireless LAN module
10 ... Bluetooth module
16 ... Main antenna
17 ... Sub antenna
19 ... Bluetooth antenna
20 ... Control unit
21 ... Body case
22 ... Display case
23 ... LCD panel
24 ... Keyboard
25 ... Hinge part
31. Modulator / demodulator
32 ... Switch part
41 ... Bluetooth signal detector
45. Output control unit
51 ... Signal line

Claims (2)

A first wireless communication module;
A second wireless communication module different from the first wireless communication module;
A first antenna connected to the first wireless communication module and used for transmitting and receiving a first wireless communication signal;
A second antenna connected to the second wireless communication module and used to transmit and receive a second wireless communication signal;
A third antenna connected to the second wireless communication module and used to receive a second wireless communication signal;
Comparing the gain of the second of said second wireless communication signal other than the signal received by the antenna, the gain of the third of the second wireless communication signal other than the signal received by the antenna, and
Control means for receiving the second radio communication signal by using either one of the second antenna and the third antenna having a small gain of a signal other than the second radio communication signal; An electronic device comprising:   The gain of the first wireless communication signal obtained from the wireless communication signal received via the second antenna and the first wireless communication signal obtained from the wireless communication signal received via the third antenna The electronic device according to claim 1, further comprising storage means for storing the gain of the electronic device.

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