JP2008061057A - Radio controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio controller which changes over to an optimum antenna without a mutual interference even when an identical bandwidth is used on the same notebook personal computer in different standards such as the radio LAN and the Bluetooth (R). <P>SOLUTION: When a transmission or reception of the radio LAN and the Bluetooth (R) is simultaneously executed, a communication controller 21 changes over a Bluetooth (R) antenna 14 to a radio LAN communication antenna 13-2 which is far in view of a distance based on a transmission mode and a reception mode of the radio LAN and the Bluetooth (R), whereby the communication controller 21 reduces a mutual interference of radio waves even when the identical bandwidth is used on the same notebook personal computer in different standards such as the radio LAN and the Bluetooth (R), and can change over to the optimum antenna which can make an efficient data communication without lowering a throughput to the utmost. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a wireless control apparatus that controls switching of a wireless communication antenna of a portable information processing apparatus (hereinafter collectively referred to as a notebook personal computer) such as a notebook personal computer having a plurality of wireless communication means of wireless communication standards.

  In recent years, due to the portability of notebook computers, network communication using a wireless LAN has become common when connecting to a network such as the Internet. In addition, there are more and more opportunities for data communication connection by wireless communication such as wireless LAN and Bluetooth than those using a wired cable such as USB and IEEE 1394 for connection between a notebook computer and an external device. Yes.

  A conventional wireless communication antenna for a notebook computer will be described below.

  FIG. 3 shows a conventional notebook computer and a wireless communication antenna.

  In FIG. 3A, 11 is a notebook personal computer main body, 12 is a display part of the notebook personal computer, and is composed of a liquid crystal panel or the like. Reference numerals 13 to 14 denote antennas for wireless communication, reference numerals 13-1 and 13-2 denote diversity antennas for wireless LAN, and reference numeral 14 denotes a Bluetooth antenna standardized as a short-range wireless communication technology. Diversity antennas 13-1 and 13-2 for the wireless LAN are disposed inside the housing at the upper left and right ends of the display unit 12, and a Bluetooth antenna is disposed at the upper right end in the figure of the notebook personal computer 11. Considering the influence of high frequency radio waves on the human body of the operator of the notebook personal computer, consideration is given to arranging these antennas as far away from the operator as possible.

As shown in FIG. 3B, the wireless LAN antenna and the Bluetooth antenna are connected to a printed wiring board 31 in which a copper foil is printed on an insulator, and a high-frequency signal transmitting unit or receiving unit (both not shown). FIG. 3A shows the configuration with a part of the personal computer case removed, but since it is actually mounted inside the case, it cannot generally be confirmed from the outside. Note that the diversity antenna is a mechanism for connecting multiple antennas and switching while switching antennas with good reception conditions as needed. Although two antennas are used in FIG. 3, only one is actually received. It is.
JP-A-9-186636

  Both wireless LAN and Bluetooth use 2.4 GHz band radio waves that users can use freely without a license. In the case of wireless LAN, communication speed decreases due to radio wave interference if Bluetooth compatible products are nearby. Sometimes. However, as described above, the diversity antenna of a wireless LAN is a mechanism that connects two antennas and receives signals while switching antennas with good reception conditions. Therefore, the wireless AN and Bluetooth as shown in FIG. 3 are configured to coexist. It is hard to say that the notebook PC has optimal diversity control, that is, appropriate switching control of a plurality of antennas.

  The present invention solves the above-mentioned conventional problems, and even when the same band is used for the same notebook computer with different standards such as wireless LAN and Bluetooth, wireless switching is performed optimally without interfering with each other. An object is to provide a control device.

The invention described in claim 1 of the present invention
A wireless control device for an information device having wireless communication means with other wireless devices according to a plurality of wireless communication standards,
A first wireless module that performs wireless transmission and reception with other wireless devices in accordance with the first wireless standard;
At least two communication antennas corresponding to the first wireless standard;
A second wireless module that performs wireless transmission and reception with other wireless devices in accordance with the second wireless standard;
At least one communication antenna corresponding to the second wireless standard;
A communication control unit for controlling transmission, reception and operation stop according to the first wireless standard, transmission, reception and operation stop according to the second wireless standard;
When transmission or reception according to the first wireless standard and transmission or reception according to the second wireless standard are performed simultaneously,
Based on the transmission mode and reception mode according to the first wireless standard, and the transmission mode and reception mode according to the second wireless standard, two or more communication antennas corresponding to the first wireless standard are included. The wireless communication device is characterized in that the communication antenna corresponding to the first wireless standard is switched to the communication antenna corresponding to the first wireless standard arranged at a position with a large isolation with respect to the communication antenna corresponding to the wireless standard. Even when using the same band with different standards such as wireless LAN and Bluetooth, it is possible to reduce the interference of radio waves with each other and perform efficient data communication without reducing the throughput as much as possible. It has an effect that antenna switching can be performed.

  As described above, the present invention reduces the interference of radio waves with each other and reduces the throughput as much as possible even when the same band is used for the same notebook PC with different standards such as wireless LAN and Bluetooth. It is possible to provide a radio control apparatus that performs optimal antenna switching that enables typical data communication.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment 1)
FIG. 1 is a diagram schematically showing the arrangement of a notebook personal computer and a wireless communication antenna according to the present invention. In FIG. 1, 11 is a notebook personal computer body, 12 is a display portion of the notebook personal computer, and is composed of a liquid crystal panel or the like. Reference numerals 13 to 14 denote antennas for wireless communication, reference numerals 13-1 and 13-2 denote diversity antennas for wireless LAN, and reference numeral 14 denotes a Bluetooth antenna. Diversity antennas 13-1 and 13-2 for the wireless LAN are disposed inside the housing at the upper left and right ends of the display unit 12, and a Bluetooth antenna is disposed at the upper right end in the figure of the notebook personal computer 11.

  FIG. 2 is a configuration diagram (a) of a wireless control device that controls switching of a wireless communication antenna according to the present invention, and a table (b) showing antenna switching control.

  In FIG. 2, 15 is a wireless control device of the present invention, 16 is a wireless LAN module that transmits and receives high-frequency signals from the wireless LAN antennas 13-1 and 13-2, 17 is transmission data before modulation to the wireless LAN module 16, and after demodulation. A wireless LAN control unit that outputs a control signal for controlling the operation and stop of the wireless LAN module 16, 18 is a Bluetooth module that transmits and receives high-frequency signals from the Bluetooth antenna 14, and 19 is a Bluetooth module 18. A Bluetooth control unit that outputs a control signal for controlling transmission data before modulation, reception data after demodulation, or operation and stop of the Bluetooth module 18, and 20 is a transmission mode of each module of the wireless LAN module 16 and the Bluetooth module 18. , Receive mode De, an interference avoidance control unit for switching the wireless LAN antennas 13-1 and 13-2 so as to avoid interfering with each other based on each mode of the stop mode. The wireless LAN control unit 17, the Bluetooth control unit 19, and the interference avoidance control unit 20 include a communication control unit 21 that can be configured integrally with a microcomputer and software.

  The operation of the radio control apparatus configured as described above will be described with reference to FIGS.

  First, when the wireless LAN and Bluetooth are in a transmission and reception state, the module that is not operating is stopped. Further, when the wireless LAN is in a communication state, the diversity controller 161 selects and operates one of the antennas 13-1 and 13-2 having the better communication state.

  When both the wireless LAN and Bluetooth are in a communication state in either a transmission state or a reception state, the communication speed (throughput) per unit time on the wireless LAN side is reduced due to interference of transmission / reception radio waves. 1 and 3, since the wireless LAN antenna 13-1 is located closer to the Bluetooth antenna 14 than the wireless LAN antenna 13-2, the degree of radio wave interference and throughput is greatly reduced. Accordingly, the interference avoidance control unit 20 detects the transmission and reception states of both the wireless LAN and Bluetooth and performs control as shown in FIG. In other words, except when both the wireless LAN and Bluetooth are in a receiving state, the wireless LAN antenna switching control is performed so as to avoid interference with the Bluetooth communication radio wave by operating the wireless LAN antenna 13-2 side.

  When both the wireless LAN and the Bluetooth are in the reception state, the demodulation state of the reception data is detected as described above, and either one of the antennas 13-1 and 13-2 having the better communication state is selected as the diversity control unit 161. Select and operate.

  As described above, according to the present embodiment, even when the same band is used for the same notebook computer with different standards such as wireless LAN and Bluetooth, radio wave interference is reduced and throughput is reduced as much as possible. Therefore, it is possible to provide a radio control apparatus that performs optimal antenna switching that enables efficient data communication without the need for data communication.

  In the above description, wireless LAN and Bluetooth using the same band frequency have been described as an example. However, even if the frequency band is different, interference and interference due to harmonics may occur, and not limited to wireless LAN and Bluetooth. Needless to say, it can be adapted to wireless standards. It can be applied to communication control in every situation, taking into account the arrangement of a notebook computer having a plurality of wireless standards, the arrangement of a plurality of antennas and their interference.

  The wireless control device according to the present invention reduces the interference of radio waves with each other and reduces the throughput as much as possible even when the same band is used for different standards such as wireless LAN and Bluetooth on the same notebook computer. It has the effect of performing optimal antenna switching that enables efficient data communication, and is useful as a wireless control device that controls switching of a wireless communication antenna of a notebook computer having wireless communication means of a plurality of wireless communication standards. is there.

The figure which shows typically arrangement | positioning of the notebook computer and radio | wireless communication antenna of this invention (A) The block diagram of the radio | wireless control apparatus which controls switching of the radio | wireless communication antenna of this invention, (b) The table | surface figure which showed switching control of the antenna Figure showing a conventional laptop computer and wireless communication antenna

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Laptop personal computer 12 Display part 13 Wireless LAN diversity antenna 14 Bluetooth antenna 15 Wireless control device 16 Wireless LAN module 17 Wireless LAN control part 18 Bluetooth module 19 Bluetooth control part 20 Interference avoidance control part 21 Communication control part 31 Antenna board 32 Antenna cable

Claims (3)

A wireless control device for an information device having wireless communication means with other wireless devices according to a plurality of wireless communication standards,
A first wireless module that performs wireless transmission and reception with other wireless devices in accordance with the first wireless standard;
At least two communication antennas corresponding to the first wireless standard;
A second wireless module that performs wireless transmission and reception with other wireless devices in accordance with the second wireless standard;
At least one communication antenna corresponding to the second wireless standard;
A communication control unit for controlling transmission, reception and operation stop according to the first wireless standard, transmission, reception and operation stop according to the second wireless standard;
When transmission or reception according to the first wireless standard and transmission or reception according to the second wireless standard are performed simultaneously,
Based on the transmission mode and reception mode according to the first wireless standard, and the transmission mode and reception mode according to the second wireless standard, two or more communication antennas corresponding to the first wireless standard are included. A radio control apparatus that switches to a communication antenna corresponding to the first radio standard, which is arranged at a position with high isolation, with respect to a communication antenna corresponding to the radio standard. When reception by the first wireless standard and reception by the second wireless standard are performed simultaneously,
The radio control apparatus according to claim 1, wherein the two or more communication antennas corresponding to the first radio standard are switched according to normal diversity control. The radio control apparatus according to claim 1 or 2, wherein the first radio standard is a wireless LAN, and the second radio standard is Bluetooth.

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