JP2003234745A - Compound radio equipment and interference avoidance control method to be used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compound radio equipment in which the interference of a signal based on IEEE802.11g and a signal based on Bluetooth(R) can be avoided. <P>SOLUTION: In a compound radio equipment 1, a wireless LAN device 20 using the standard of IEEE802.11g to use the same frequency band called ISM band and a weak radio wave wireless device 30 using the Bluetooth(R) are composed. A problem on the mutual interference of the signals to occur when the wireless LAN device 20 and the weak radio wave wireless device 30 are composed is solved by varying the frequency band of the wireless LAN device 20 and adaptively hopping a frequency to a frequency band which is not used for this wireless LAN device 20 by the weak radio wave wireless device 30. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite radio apparatus and an interference avoidance control method used for the same, and particularly to 2.4 GHz.
The present invention relates to an interference avoidance control method for avoiding interference between a wireless LAN and Bluetooth (R) in a band.

[0002]

2. Description of the Related Art Conventionally, in a composite wireless device, the same I
SM (Industrial Science Med)
I.C.) (2400 to 2483.5 MHz) band, and a wireless LAN (Local Area Ne) using the IEEE 802.11g standard.
device) (2.4 GHz band wireless LAN) and B
There is a device that uses a weak radio wave device using Bluetooth (R) at the same place.

In this case, mutual signals of the wireless LAN device and the weak radio wave device interfere with each other, which hinders high-speed data transfer. As a method for avoiding this, there is an adaptive frequency hopping method in which a weak radio wave radio device uses a frequency band that is not used by the wireless LAN device to solve mutual interference.

[0004]

However, in the above-mentioned adaptive frequency hopping method, this method does not work when the wireless LAN device uses most of the band of 2400 to 2483.5 MHz.

Therefore, not only the weak radio wave device needs to adaptively change the frequency hopping band, but also the wireless LAN device needs to adaptively change the frequency band.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a signal and a Bluetooth according to IEEE 802.11g.
It is an object of the present invention to provide a composite radio apparatus capable of avoiding interference with a signal due to oooth (R) and an interference avoidance control method used for the composite radio apparatus.

[0007]

A compound radio apparatus according to the present invention is a wireless LAN (Local) using the same frequency band.
An area network device and a weak radio wave device are combined, and the wireless LAN
The radio management apparatus includes means for variably controlling the frequency band of the apparatus, and means for controlling to hop the frequency adaptively to the frequency band not used by the wireless LAN apparatus in the weak radio wave wireless apparatus. .

According to the interference avoidance control method of the present invention, a wireless LAN (Local Area) using the same frequency band is used.
A method for controlling interference in a composite wireless device, which is a combination of a network device and a weak radio wave device, comprising: variably controlling a frequency band of the wireless LAN device; And controlling to adaptively hop the frequency to a frequency band that is not being used.

That is, the composite wireless apparatus of the present invention is the same as ISM (Industrial Science Me).
IEEE) 802.11g using a frequency band called the digital (2400 to 2483.5 MHz) band
LAN device using the standard of 2.4 GHz band wireless L
AN) and a weak radio frequency radio device using Bluetooth (R) are used in the same place, the problem of mutual signal interference is caused by varying the frequency band of the wireless LAN device, while the weak radio frequency radio device is used. Is solved by adaptively hopping a frequency to a frequency band not used by this wireless LAN device.

For example, a wireless LAN device has a band of 22 MHz
Is transmitted at a frequency of 2401 to 2423 MHz,
Signal of 1MHz band is 2400-2 in the weak radio equipment
It is known that when transmitted while hopping within 483.5 MHz, both the wireless LAN device and the weak radio wave device are interfered with each other's signals, making it difficult to exchange data accurately and at high speed.

On the other hand, when the wireless LAN device transmits a 22 MHz band signal at a frequency of 2401 to 2423 MHz, the weak radio wave device transmits a 1 MHz band signal to 242.
An adaptive frequency hopping method for avoiding mutual interference by transmitting within 4 MHz to 2483.5 MHz is also considered.

However, the wireless LAN device has a bandwidth of 22.
The three signals of MHz are, for example, 2401-2
123 MHz, 2125 to 2147 MHz, 2150 to
When transmitting at 2172 MHz, the adaptive frequency hopping method can use a band of about 10 MHz, and the resistance of the weak radio wave radio device to the interference wave is significantly deteriorated.

Therefore, in the present invention, the wireless LAN device uses OFDM (Orthogonal Frequency) for modulation.
cy Division Multiplexing)
By using the method, the number of carriers is made variable according to the frequency environment of the signal, and the weak radio wave radio device can hop the frequency to the frequency of the gap, thereby avoiding mutual interference. There is.

By the way, IEEE 802.11g is IE
An extended version of IEEE 802.11b, which is IEEE 802.11
b has a maximum transfer rate of 11 MHs, while IE
With EE802.11g, the maximum transfer rate is increased to 54 MHz.

As described above, the OFD is used in the wireless LAN device.
By changing the number of carriers of the M modulator and hopping the weak radio wave device to the corresponding frequency, the wireless L
It is possible to avoid signal interference between the AN device and the weak radio wave device.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a composite wireless device according to the first embodiment of the present invention. Figure 1
In the composite wireless device 1, the wireless management device 10 and the IE
Wireless LAN (Loc) that uses the EE 802.11g standard
al Area Network) device (2.4 GHz
Band wireless LAN) 20, a weak radio wave device 30 using Bluetooth (R), a power supply device 40, and a memory device 50.

The wireless management device 10 manages the frequencies used by the wireless LAN device 20 and the weak radio wave device 30.
The power supply device 40 supplies power to the wireless management device 10, the wireless LAN device 20, and the weak radio wave device 30, respectively.
A control procedure (program) of the wireless management device 10 is written in the memory device 50. Here, the wireless LAN device 2
0 indicates that a plurality of signals can be transmitted and received.

The compound wireless device 1 has the same ISM (Indus).
trial Science Medical (24)
The wireless LAN device 20 uses the IEEE 802.11g standard that uses a frequency band called the "00-2483.5 MHz) band, and the weak radio wave device 30 that uses Bluetooth (R) is combined.

In this embodiment, as described above, the wireless LAN
The wireless LAN device 20 addresses the problem of mutual signal interference that occurs when the device 20 and the weak radio wave device 30 are combined.
Frequency band of the weak radio wave radio device 30
Solves this problem by adaptively hopping the frequency to a frequency band not used by the wireless LAN device 20.

For example, as shown in FIG. 2, in the wireless LAN device 20, a signal having a band of 22 MHz has a frequency of 2401.
˜2423 MHz, and a signal of 1 MHz band is transmitted by the weak radio wave device 30 from 2400 to 2483.5 M.
If it is transmitted while hopping in Hz, wireless LA
It is known that both the N device 20 and the weak radio wave device 30 are interfered with each other by signals to make it difficult to exchange data accurately and at high speed.

On the other hand, as shown in FIG. 3, in the wireless LAN device 20, a signal having a band of 22 MHz has a frequency of 2401 to 2401.
When transmitted at 2423 MHz, the weak radio wave device 30 transmits a signal in the band of 1 MHz from 2424 MHz to 248 MHz.
An adaptive frequency hopping method is also considered in which transmission is performed within 3.5 MHz and mutual interference is avoided.

However, as shown in FIG.
The AN device transmits three signals in the band of 22 MHz to, for example, 2401 to 2123 MHz and 2125 to 2147, respectively.
MHz, 2150 to 2172 MHz, when the adaptive frequency hopping method described above, the available bandwidth is 10M.
Since the frequency becomes about Hz, the resistance of the weak radio wave device 30 to the interference wave is significantly deteriorated.

Therefore, as shown in FIG. 5, in the present embodiment, the wireless LAN device 20 uses OFDM (Ortho) for modulation.
GONAL FREQUENCY DIVISION
Multiplexing) method is used to change the number of the carriers according to the frequency environment of the signal so that the weak radio wave device 30 can hop the frequency to the frequency of the gap to avoid mutual interference. I am taking it.

By the way, IEEE 802.11g is IE
An extended version of IEEE 802.11b, which is IEEE 802.11
b has a maximum transfer rate of 11 MHs, while IE
With EE802.11g, the maximum transfer rate is increased to 54 MHz.

FIG. 6 is a block diagram showing the configuration of the wireless LAN device 20 of FIG. In FIG. 6, a wireless LAN device 20 includes an RF (Radio Frequency) unit 21.
The base band unit 22, the media access controller unit 23, the power supply unit 24, and the memory unit 25.

The RF unit 21 includes an antenna, a transmission / reception signal amplifier, a filter, a modulator / demodulator, and a PLL (Phase Loc).
Ked Loop) synthesizer etc.,
Modulates and demodulates a wireless signal.

The baseband unit 22 is a DSP (Digit).
al Signal Processor) etc., and performs OFDM modulation / demodulation of signals. Media Access Controller (MAC: Media Access Co)
control unit 23 is a host computer (not shown)
And an interface with the baseband unit 22, TCP /
IP (Transmission Control P)
rotocol / Internet Protocol
The part corresponding to the data link layer in 1) is composed of a DSP or the like.

The power supply unit 24 supplies power to the RF unit 21, the baseband unit 22, the media access controller unit 23, and the memory unit 25, respectively. A wireless access method (program) is written in the memory unit 25.

FIG. 7 is a block diagram showing the structure of the base band unit 22 of FIG. In FIG. 7, the baseband unit 22 includes an OFDM modulator including a serial-to-parallel converter 22b, a complex information converter 22c, an inverse Fourier transformer 22d, a parallel-to-serial converter 22e, and the like, and a serial->
An O including a parallel converter 22f, a Fourier converter 22g, a judging device 22h, a parallel → serial converter 22i, and the like.
It is composed of an FDM demodulator, and the number of carriers used by them is set by the number-of-carriers setter 22a.

For example, assuming that the maximum number of carriers that can be set is M, the serial-to-parallel converter 12 can distribute 2M signals. However, if the number of carriers is reduced by M-1 and the number of carriers is reduced by one, the serial-to-parallel converter 12 sets the carrier number setter 11 so as to distribute signals of 2M-2.

FIG. 8 is a block diagram showing the configuration of the weak radio wave radio device 30 of FIG. In FIG. 8, the weak radio wave device 30 includes an RF unit 31, a baseband unit 32, a link management unit 33, a host controller interface unit 34, a power supply unit 35, and a memory unit 36.

The RF unit 31 is composed of an antenna, a transmission / reception signal amplifier, a filter, a modulator / demodulator, a PLL synthesizer, etc., and modulates / demodulates a radio signal. The baseband portion 32 is D
It is composed of an SP or the like, and performs connection with another weak radio wave radio device that transmits and receives data, exchanges of data transfer, and sets a frequency hopping pattern.

The link management unit 33 is composed of a DSP or the like,
Establishes links between devices and controls security.
The host controller interface unit 34 is an interface for an application to access the weak radio wave device 30 side.

The power supply unit 35 supplies power to the RF unit 31, the baseband unit 32, the link management unit 33, the host controller interface unit 34, and the memory unit 36, respectively. The memory section 36 is composed of a flash memory or the like, and the connection procedure of the baseband section 32, the link management section 33, etc. is written therein.

FIG. 9 is a diagram showing a frequency hopping pattern setting unit (Selection Box) which is one of the functions of the baseband unit 32 of the weak radio wave radio device 30 of FIG. In FIG. 9, when the available frequency is input, the frequency hopping pattern setter 32a sets the frequency hopping pattern within the frequency range,
Output hopping frequency. Here, there are a 79 MHz system and a 23 MHz system for frequency hopping. Hereinafter, a normal 79 MHz hopping pattern setting method will be described.

FIG. 10 is a diagram showing a normal hopping pattern setting method by the frequency hopping pattern setting device 32a of FIG. Referring to FIG. 10, first, numbers are assigned from 1 to every 1 MHz from “0” to “78”, and the numbers are assigned from even numbers to “0”, “2”, “4”, “6”, ..., “7”.
"8", then odd numbers "1", "3", "5",
Lined up with "7", ..., "77". That is,
"0", "2", "4", "6", ..., "78",
"1", "3", "5", "7", ..., "77" are arranged.

Next, 32 of them are sequentially selected from the beginning, for example, if "0" is selected, "0",
“2”, “4”, ..., “62” are selected. Then, this is rearranged in a random order, and this is used as the first hopping pattern.

Also, 16 offsets are given,
"32", "18", "20", ..., "1",
"3", ..., "15", which are rearranged in a random order again and become the next hopping pattern. After that, 16 offsets are further provided, and the above processing is repeated.

FIG. 11 is a diagram showing a hopping pattern setting method when the band is limited by the frequency hopping pattern setting unit 32a shown in FIG. Referring to FIG.
When all bands cannot be used, for example, 4 to 20 (band 1
If you cannot use up to 7MHz), "0", "2",
"22", "24", ..., "78", "1" and 32
The pieces are arranged and rearranged in a random order, which becomes the hopping pattern.

Next, since 16 offsets are given, "52", "54", "56", ..., "7"
8 ”,“ 1 ”,“ 3 ”,“ 21 ”, ...,“ 49 ”,
It becomes "51" and is rearranged in a random order again, which becomes the next hopping pattern. In this case, 4 to 20 are not always used, but they are arranged in order and rearranged at random to determine the next hopping pattern.

Next, a hopping pattern setting method for the 23 MHz system will be described. If there is no normal band limitation, there is no difference from the above 79 MHz system. Also, 23
In the case of the MHz system, even if there is a band limitation, the required 16
When it is possible to secure the frequency band for each piece or the band required by the weak radio wave radio device 30, there is no difference from the 79 MHz system shown in FIG.

However, 1 required for band limitation
In some cases, it is not possible to secure the six frequency bands or the band required by the weak radio wave radio device 30.
For example, when 4 to 16 (band 13 MHz) cannot be used, the band is expanded to, for example, 37 MHz, and “0”,
"2", "18", "20", "22", "24",
"26", "28", "30", "32", "34",
It is arranged with "36", "1", "3", "17", and "19" so as to secure the necessary 16 frequency bands. This is rearranged in a random order, which becomes the hopping pattern.

When the 23 MHz system is used, eight offsets are given, and "30", "32", "34", "3" are given.
6 ”,“ 1 ”,“ 3 ”,“ 17 ”,“ 19 ”,“ 2 ”
1 ”,“ 23 ”,“ 29 ”,“ 31 ”,“ 33 ”,“ 3 ”
5 ”,“ 0 ”,“ 2 ”,“ 18 ”, which are rearranged in a random order again, which becomes the next hopping pattern. The above process is repeated.

FIG. 12 is a sequence chart showing the control of the wireless LAN device 20 and the weak radio wave device 30 by the wireless management device 10 of FIG. 1. FIG. 13 shows the baseband section 22 of the wireless management device 10 of FIG. 7 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator and the occupied frequency band of the weak radio wave device 30. The operation of the first embodiment of the present invention will be described with reference to FIGS. 1, 6 to 9, 12 and 13.

Referring to FIG. 12, the wireless LAN device 20
And the power of the weak radio wave device 30 is on, and the wireless LAN
Device 20 only has one or more 22 at a frequency
In the situation where data transfer is performed using the MHz band, the weak radio wave radio device 30 issues a use request to the radio management device 10 (a1 in FIG. 12).

The wireless management device 10 is a wireless LAN device 20.
Is inquired about the frequency band currently occupied by the wireless LAN device 20 (a2 in FIG. 12). On the other hand, wireless L
The AN device 20 returns the occupied frequency band to the wireless management device 10 (a3 in FIG. 12).

The radio management apparatus 10 follows the flow shown in FIG. 13 and the baseband section 22 of the radio LAN apparatus 20.
The number of carriers used by the OFDM modulator is determined, and a request for changing the number of carriers used by the OFDM modulator of the baseband unit 22 is issued to the wireless LAN device 20 (a4 in FIG. 12).

Here, the number of signals used in the wireless LAN device 20 is i, and the number of carriers is fc1_carrier.
_Number, fc2_carrier_number
r, ..., fci_carrier_number
(Hereinafter, referred to as Fc1, Fc2, ..., Fci), and the total number of carriers is carrier_number.
(Hereinafter referred to as Cn), the general formula for calculating the number of carriers is Fck = (Cn × Fck) / (Fc1 + Fc2 + ... + Fci) or Fck = Fck (k = 0, 1, ...・, I)

Similarly, the available frequency band is available
When the available_BW (hereinafter, referred to as Abw) and the carrier band are carrier_BW (hereinafter, referred to as Cbw), the occupied frequency band BTbw of the weak radio wave wireless device 30.
Is BTbw = Abw− (Fc1 + Fc2 + ... + Fci) × Cbw.

According to the request, the wireless LAN device 20
After changing the number of carriers based on the changed number of carriers, a change completion reply is issued together with parameters such as the numbers of carriers fc1 and fc2 (a5 in FIG. 12).

The radio management device 10 is a weak radio wave radio device 30.
Parameters such as frequency band capable of hopping, wireless L
Center frequency fc of signal used in AN device 20
1, fc2, the number of carriers Fc1, Fc2, and the occupied frequency band BTbw are transmitted (a6 in FIG. 12).

The weak radio frequency radio device 30 is based on the frequency band capable of hopping, and the frequency hopping pattern setter 32a of the base band section 32 of the weak radio frequency radio device 30 is used.
The frequency hopping pattern is determined by and the frequency hopping pattern determination response is issued (a7 in FIG. 12). The weak radio wave wireless device 30 starts the data transfer by hopping the frequency within the set frequency.

Here, referring to FIG. 13, the radio management apparatus 1
A process of determining the number of carriers used in the OFDM modulator of the baseband unit 22 and the occupied frequency band of the weak radio wave device 30 by 0 will be described.

The radio management device 10 is a weak radio wave device 30.
After the usage request from the wireless LAN device 20, parameters of the wireless LAN device 20 (center frequency: fc1, fc2, number of carriers: Fc1,
Fc2, carrier band: Cbw) is obtained (step S1 in FIG. 13).

The radio management device 10 uses "(Fc1 + Fc2) x Cbw>Abw-Mi" based on the obtained parameters.
n ”is determined (step S in FIG. 13).
2). Here, Min is the minimum Bluetooth (R)
It is a frequency band (mini_BW).

The radio management device 10 displays "(Fc1 + Fc2)
XCbw> Abw-Min ", Cn = (Abw-Min) / Cbw Fc1 = CnxFc1 / (Fc1 + Fc2) Fc2 = CnxFc2 / (Fc1 + Fc2) BTbw = Min is calculated (step S3 in FIG. 13). .

Further, the radio management device 10 displays "(Fc1 + F
c2) × Cbw> Abw-Min ”, BTbw = Abw− (Fc1 + Fc2) × Cbw is calculated (step S4 in FIG. 13).

The radio management device 10 has parameters (center frequency: fc1, fc2, number of carriers :) obtained from the above calculation.
Fc1, Fc2, Bluetooth (R) occupied band:
BTbw etc.) change request is transmitted to the wireless LAN device 20 or the weak radio wave device 30 (step S5 in FIG. 13).

FIG. 14 is a sequence chart showing the control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the second embodiment of the present invention, and FIG. 15 is the wireless communication according to the second embodiment of the present invention. Wireless LAN of management device
7 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator of the baseband unit of the device and the occupied frequency band of the weak radio wave device. The configuration of the compound wireless device according to the second embodiment of the present invention and the internal parts thereof is the same as that of the first embodiment of the present invention described above.
Description will be made using the same configuration as that of the first embodiment of the present invention.

With reference to these FIGS. 14 and 15, in the second embodiment of the present invention, when the wireless LAN device 20 and the weak radio wave device 30 are transmitting, the wireless LAN device 20 newly sends a signal. The operation when transmitting is described.

In the second embodiment of the present invention, the wireless LAN device 20 and the feeble radio wave device 30 are powered on, the weak radio wave device 30 transfers data, and the wireless LAN device 2
This is different from the above-described first embodiment of the present invention in that the wireless LAN device 20 newly tries to transfer data under the situation where data is transferred by using one signal or a plurality of signals.

Referring to FIG. 14, the wireless LAN device 20
In addition, when the power of the weak radio wave wireless device 30 is turned on, the weak radio wave wireless device 30 transfers data, and the wireless LAN device 20 transfers data using one or a plurality of signals, a new wireless communication is performed. The LAN device 20 transmits the usage request and the currently occupied frequency band to the wireless management device 10 (a11 in FIG. 14).

Then, the radio management device 10 calculates the number of carriers used in the OFDM modulator of the baseband unit 22 of the wireless LAN device 20 according to the flow shown in FIG. 15, and can first hop to the weak radio wave device 30. Parameters such as various frequency bands, center frequencies fc1 and fc2 of signals used in the wireless LAN device 20, the number of carriers Fc
1, Fc2, and occupied frequency band BTbw are transmitted (step B2).

Here, the number of signals used in the wireless LAN device 20 is i, and the number of carriers is Fc1, Fc2, ...
., Fci, the number of newly added carriers Fc
(I + 1) is Fc (i + 1) = (Abw-Min) / Cbw- (Fc
1 + Fc2 + ... + Fci) Alternatively, Fc (i + 1) = Max / Cbw. However, Max is the maximum number of carriers (Mac_ca
rlier_number).

The weak radio wave radio device 30 is based on the frequency band capable of hopping, and the frequency hopping pattern setter 3 in the base band section 32 of the weak radio wave radio device 30 is used.
The frequency hopping pattern is determined in 2a, a frequency hopping pattern determination response is issued (a13 in FIG. 14), the frequency is hopped within the set frequency, and data is transferred.

The wireless management device 10 issues a request for changing the number of carriers to the wireless LAN device 20, together with the calculated parameters, the numbers of carriers Fc1, Fc2, etc. (A14 in FIG. 14). The wireless LAN device 20 is based on the number of changed carriers for each signal,
After changing the number of carriers, a change completion reply is issued (a15 in FIG. 14).

Here, with reference to FIG. 15, the radio management apparatus 1
A process of determining the number of carriers used in the OFDM modulator of the baseband unit 22 and the occupied frequency band of the weak radio wave device 30 by 0 will be described.

After the usage request from the wireless LAN device 20, the wireless management device 10 has parameters (center frequency: fc1, fc2, number of carriers: Fc1, Fc) of the wireless LAN device 20.
2, carrier band: Cbw), parameters of the weak radio wave device 30 (Bluetooth (R) occupied band: BT
bw) is obtained (step S11 in FIG. 15).

The radio management device 10 uses "(Fc1 + Max) * Cbw> Abw-BTb based on the obtained parameters.
w ”is determined (step S1 in FIG. 15).
2). The wireless management device 10 displays “(Fc1 + Max) × Cb
If w> Abw-BTbw ", then Fc2 = (Abw-Min) / (Cbw-Fc1) BTbw = Min is calculated (FIG. 15, step S13).

Further, the radio management device 10 displays "(Fc1 + M
ax) × Cbw> Abw-BTbw ”, Fc2 = Max / Cbw is calculated (step S14 in FIG. 15).

The radio management device 10 has parameters (center frequency: fc1, fc2, number of carriers :) obtained from the above calculation.
Fc1, Fc2, Bluetooth (R) occupied band:
BTbw) change request is transmitted to the wireless LAN device 20 or the weak radio wave wireless device 30 (step S15 in FIG. 15).

16 and 17 are sequence charts showing the control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the third embodiment of the present invention, and FIG. 18 is the third embodiment of the present invention. 9 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator of the baseband part of the wireless LAN device of the wireless management device and the occupied frequency band of the weak radio wave device according to the example. The configuration of the compound wireless device and the internal parts thereof according to the third embodiment of the present invention is the same as that of the first embodiment of the present invention described above, and therefore, the same as the first embodiment of the present invention. The configuration will be described.

With reference to FIGS. 16 to 18, for example, when the wireless LAN device 20 ends the transmission of one signal under the situation where the wireless LAN device 20 and the weak radio wave device 30 are transmitting. The operation will be described.

In the third embodiment of the present invention, the wireless LAN device 20 and the weak radio wave device 30 are powered on, and the weak radio wave device 30 performs data transfer.
When the wireless LAN device 20 completes the data transfer of one signal under the condition that data is transferred by using one signal or a plurality of signals, the released frequency band is set to the other wireless LAN device 20. It is different from the first embodiment of the present invention in that it is assigned to a signal or a signal of the weak radio wave device 30.

Referring to FIG. 16, the wireless LAN device 20
In a situation where the power of the weak radio wave wireless device 30 is turned on, the weak radio wave wireless device 30 transfers data, and the wireless LAN device 20 transfers data using one or a plurality of signals, the wireless LAN device 20 terminates the transmission of one signal to the wireless management device 10 and transmits parameters such as the center frequency of the signal and the number of carriers used (FIG. 16).
A21).

When the wireless management apparatus 10 is set to preferentially allocate the frequency band to the wireless LAN apparatus 20, the wireless management apparatus 10 follows the flow shown in FIG. The number of carriers used in the OFDM modulator of No. 4 is calculated, and the wireless LAN device 20 is requested to change the number of carriers used in the OFDM modulator of the baseband unit 22 (a in FIG. 16).
22).

Here, the number of signals used in the wireless LAN device 20 is i, and the number of carriers is Fc1, Fc2, ...
, Fc (i-1), where Fci is the number of carriers of the signal for ending transmission, the general formula of the frequency band allocation calculation to other signals of the wireless LAN device 20 is: Fck = (Fc3 × Fck) / (Fc1 + Fc2 + ... + Fc (i-1)) Alternatively, Fck = Max (k = 0, 1, ..., i-1).

The wireless LAN device 20 follows the request,
After changing the number of carriers based on the changed number of carriers, a change completion reply is issued together with parameters such as the number of carriers Fc1 (a23 in FIG. 16).

The radio management device 10 is a weak radio wave device 30.
Parameters such as frequency band capable of hopping, wireless L
Center frequency fc of signal used in AN device 20
1, the number of carriers Fc1 is transmitted (a24 in FIG. 16).
The weak radio wave device 30 uses the baseband unit 3 in the weak radio wave device 30 based on the frequency band capable of hopping.
The frequency hopping pattern setter 32 in 2 determines the frequency hopping pattern, issues a frequency hopping pattern determination response (a25 in FIG. 16), hops the frequency within the set frequency, and starts data transfer.

Here, referring to FIG. 18, the radio management apparatus 1
A process of determining the number of carriers used in the OFDM modulator of the baseband unit 22 and the occupied frequency band of the weak radio wave device 30 by 0 will be described.

The radio management apparatus 10 is a weak radio wave radio apparatus 30.
After the end of using the frequency fc3 from the wireless LAN device 20, parameters of the wireless LAN device 20 (center frequency: fc1, fc2, fc3, number of carriers: Fc1, Fc2, Fc3, carrier band: C
bw) is obtained (step S21 in FIG. 18).

The radio management apparatus 10 determines "Fc3- (Max-Fc1)-(Max-Fc) based on the obtained parameters.
2) It is determined whether or not <0 ”(step S22 in FIG. 18).

The radio management device 10 displays "Fc3- (Max-
If Fc1) − (Max−Fc2) <0 ”, then Fc1 = (Fc3 × Fc1) / (Fc1 + Fc2) Fc2 = (Fc3 × Fc2) / (Fc1 + Fc2) is calculated (FIG. 18, step S23).

Further, the radio management device 10 displays "Fc3- (M
If not "ax-Fc1)-(Max-Fc2) <0", Fc1 = Max Fc2 = Max is calculated (step S24 in FIG. 18).

The radio management device 10 has parameters (center frequency: fc1, fc2, number of carriers :) obtained from the above calculation.
(Fc1, Fc2, etc.) change request is transmitted to the wireless LAN device 20 and the weak radio wave device 30 (step S2 in FIG. 18).
5).

Further, referring to FIG. 17, when the power supplies of the wireless LAN device 20 and the weak radio wave device 30 are turned on, the weak radio wave device 30 transfers data, and the wireless LAN device 20 sends one or a plurality of signals. Under the situation that data is being transferred using the wireless LAN device 20, the wireless LAN device 20 completes the transmission of one signal to the wireless management device 10, and transmits parameters such as the center frequency of the signal and the number of carriers used (a31 in FIG. 17). ).

When the radio management apparatus 10 is set to preferentially allocate the frequency band to the weak radio wave radio apparatus 30, the radio management apparatus 10 is set to the weak radio wave radio apparatus 3
Parameters such as frequency band capable of hopping to 0, center frequency fc of signal used in the wireless LAN device 20
1, fc2 and carrier numbers Fc1 and Fc2 are transmitted (a32 in FIG. 17).

The weak radio frequency radio device 30 is based on the frequency band capable of hopping, and the frequency hopping pattern setter 3 in the base band section 32 of the weak radio frequency radio device 30 is used.
The frequency hopping pattern is determined in 2a, a frequency hopping pattern determination response is issued (a33 in FIG. 17), the frequency is hopped within the set frequency, and data transfer is started.

FIG. 19 is a sequence chart showing the control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the fourth embodiment of the present invention. This Figure 1
Referring to FIG. 9, a control operation of the wireless management device for the wireless LAN device and the weak radio wave device according to the fourth embodiment of the present invention will be described.

In the fourth embodiment of the present invention, the power of the wireless LAN device (# 1) and the weak radio wave wireless device is on, the weak radio wave wireless device transmits and the wireless LAN device (# 1) receives. Under the circumstance, the wireless LAN device (# 1) may be used by another wireless LA device.
When the N device (# 2) senses the signal being transmitted and the signal state is notified, the frequency hopping band of its own weak radio wave radio device is adapted, and if necessary, the wireless LAN device This is different from the first embodiment of the present invention in that a request for changing the number of carriers used in the OFDM modulator of the baseband unit of (# 2) is transmitted.

Referring to FIG. 19, the wireless LAN device (#
1) and the weak radio wave wireless device are turned on, and the wireless LAN device (# 1) receives another wireless LAN device (# 1) while the weak radio wave wireless device is transmitting and the wireless LAN device (# 1) is receiving. # 2) senses the signal being transmitted, and the center frequency fc of the parameter signal in that signal state, the number of carriers Fc, etc. are reported (a41 in FIG. 19).

The wireless LAN device (# 1) transmits the obtained parameters to the wireless management device (a42 in FIG. 19). According to the flow shown in FIG. 13, the wireless management device determines the number of carriers used in the OFDM modulator of the baseband part of the other wireless LAN device (# 2) based on the parameters, and performs OFDM modulation of the baseband part. A request for changing the number of carriers used in the container is issued to the wireless LAN device (# 1) (a43 in FIG. 19). The wireless LAN device (# 1) transmits these parameters to the other wireless LAN device (# 2) (a44 in FIG. 19).

According to the request, the other wireless LAN apparatus (# 2) changes the number of carriers based on the changed number of carriers, and then sends a change completion reply together with parameters such as the number of carriers Fc1 and Fc2. It is taken out to (# 1) (a45 in FIG. 19). The wireless LAN device (# 1) transmits a change completion reply to the wireless management device together with these parameters (a46 in FIG. 19).

The radio management device calculates parameters such as frequency bands that can be hopped to the weak radio wave radio device, the center frequency fc of the signal used in the radio LAN device (# 2), the number of carriers Fc, and occupation. Frequency band BTb
W is transmitted (a47 in FIG. 19).

The weak radio frequency radio device determines the frequency hopping pattern by the frequency hopping pattern setter in the base band section of the weak radio frequency radio device based on the hopping frequency band, and issues a frequency hopping pattern determination reply (FIG. 19). A48), hopping the frequency within the set frequency and transmitting the data.

After this, the wireless LAN device (# 2) is connected to the wireless L
The AN device (# 1) is notified of the end of transmission (a4 in FIG. 19).
9). The wireless LAN device (# 1) sends the end of transmission to the wireless management device (a50 in FIG. 19). The wireless management device uses the value of the occupied frequency band BTbw as the maximum available frequency Ab.
It is transmitted so that it is set to w (a51 in FIG. 19).

The weak radio frequency radio device determines the frequency hopping pattern by the frequency hopping pattern setter in the baseband part of the weak radio frequency radio device based on the frequency band capable of hopping, and issues a frequency hopping pattern decision reply (FIG. 19). A52), hopping the frequency within the set frequency and transmitting the data.

As described above, in this embodiment, the band of the OFDM modulator used in the wireless LAN device is changed in the terminal in which the wireless LAN device and the weak radio wave device are combined, and the weak radio wave device corresponds thereto. By frequency hopping, signal interference between the wireless LAN device and the weak radio wave device can be avoided.

In addition, in the present embodiment, not only avoiding signal interference only in the terminal in which the wireless LAN device and the weak radio wave device are combined, but also the band used by another wireless LAN device is known. Thus, the frequency band of the signal of the weak radio wave wireless device can be changed to avoid the signal interference with other wireless LAN devices.

[0100]

As described above, according to the present invention, in a compound wireless device in which a wireless LAN device and a weak radio wave wireless device that use the same frequency band are combined, the frequency band of the wireless LAN device is variably controlled and a weak radio wave is used. By controlling the wireless device to hop the frequency adaptively to a frequency band not used by the wireless LAN device,
Signaling and Bluetooth according to IEEE 802.11g
The effect that it is possible to avoid interference with the signal due to h (R) is obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a composite wireless device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing an operation concept of the compound wireless device according to the first embodiment of the present invention.

FIG. 3 is a diagram showing an operation concept of the compound wireless device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an operation concept of the compound wireless device according to the first embodiment of the present invention.

FIG. 5 is a diagram showing an operation concept of the compound wireless device according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of the wireless LAN device of FIG.

7 is a block diagram showing a configuration of a baseband unit shown in FIG.

FIG. 8 is a block diagram showing a configuration of the weak radio frequency radio device of FIG.

9 is a diagram showing a frequency hopping pattern setting device which is one of the functions of the baseband unit of the feeble radio wave device of FIG.

10 is a diagram showing a normal hopping pattern setting method by the frequency hopping pattern setting device of FIG.

11 is a diagram showing a hopping pattern setting method when the frequency hopping pattern setting device of FIG. 9 is band-limited.

12 is a sequence chart showing control by the wireless management device of FIG. 1 for a wireless LAN device and a weak radio wave device.

13 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator of the baseband unit and the occupied frequency band of the weak radio wave radio device by the radio management device of FIG.

FIG. 14 is a sequence chart showing a control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the second embodiment of the present invention.

FIG. 15 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator of the baseband part of the wireless LAN device of the wireless management device and the occupied frequency band of the weak radio wave device according to the second embodiment of the present invention. is there.

FIG. 16 is a sequence chart showing a control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the third embodiment of the present invention.

FIG. 17 is a sequence chart showing a control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the third embodiment of the present invention.

FIG. 18 is a flowchart showing a process of determining the number of carriers used in the OFDM modulator of the baseband unit of the wireless LAN device of the wireless management device and the occupied frequency band of the weak radio wave device according to the third embodiment of the present invention. is there.

FIG. 19 is a sequence chart showing a control operation for the wireless LAN device and the weak radio wave device of the wireless management device according to the fourth example of the present invention.

[Explanation of symbols]

1 Compound Wireless Device 10 Wireless Management Device 20 Wireless LA Using IEEE 802.11g Standard
N device 21, 31 RF unit 22, 32 Baseband unit 22a Carrier number setting device 22b, 22f Serial to parallel converter 22c Complex information device 22d Inverse Fourier transformer 22e, 22i Parallel to serial converter 22g Fourier transformer 22h Judgment Device 23 Media access controller unit 24, 35 Power supply unit 25, 36 Memory unit 30 Weak radio wave device 32a using Bluetooth (R) Frequency hopping pattern setter 33 Link management unit 34 Host controller interface unit 40 Power supply device 50 Memory device

Claims (6)

[Claims] 1. A wireless LAN (L that uses the same frequency band
A composite wireless device in which a wireless local area network device and a weak radio wave wireless device are combined, and means for variably controlling the frequency band of the wireless LAN device, and the wireless LAN device not being used in the weak wireless radio device. A composite radio apparatus comprising: a radio management apparatus including means for controlling to hop the frequency adaptively to a frequency band. 2. The wireless management apparatus uses OFDM (Orthogonal F) for modulation in the wireless LAN apparatus.
requisition division multipl
The number of carriers is varied according to the frequency environment of the signal by using the (ex. A compound wireless device as described. 3. The wireless LAN device and the weak radio wave device are ISM (Industrial Science).
ce Medical) band 2400-2483.
The composite radio apparatus according to claim 1, wherein a frequency band of 5 MHz is used. 4. A wireless LAN (L that uses the same frequency band
an interference avoidance control method for a composite wireless device in which a wireless local area network device and a weak radio wireless device are combined, the method comprising: variably controlling a frequency band of the wireless LAN device; and the wireless LAN device in the weak radio wireless device. And a method of adaptively hopping a frequency in a frequency band not used by the interference avoidance control method. 5. The OF in the modulation in the wireless LAN device
DM (Orthogonal Frequency D
The number of carriers is varied according to the frequency environment of a signal by using the division multiplex method, and the weak radio wave radio device is controlled so that the frequency can be hopped to the frequency of the gap. 4. The interference avoidance control method described in 4. 6. The wireless LAN device and the weak radio wave device are ISM (Industrial Science).
ce Medical) band 2400-2483.
The interference avoidance control method according to claim 4 or 5, wherein a frequency band of 5 MHz is used.