JP2003169017A - System, method and device for radio communication, transmission output control method, storage medium, and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication system which overcomes problems of giving and receiving interference. <P>SOLUTION: The radio communication system which performs radio communication by using a wide-band signal is equipped with narrow-band antennas 101 to 104 which have communication bands narrower than the wide communication and obtain the wide communication band by putting those narrow bands, a radio reception part 107 which performs reception processing for signals received through the respective antennas 101 to 104, a radio transmission part 108 which performs transmission processing for sending signals through the antennas 101 to 104, and a center control part 109 which individually controls the driving of the narrow-band antennas 101 to 104 for radio communication. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention spreads over a very wide frequency band and has a very fine pulse width (for example, 1
a wireless communication system and a wireless communication method, a wireless communication device, a transmission output control method, a storage medium, and a computer program, which employ a UWB communication method for performing baseband transmission using a signal composed of a pulse train of (nsec or less). The present invention relates to a wireless communication system and wireless communication method, a wireless communication device, a transmission output control method, a storage medium, and a computer program that overcome the problems of interference and interference with other wireless communication systems in the UWB communication system.

The present invention also provides a wireless communication system and wireless communication method, a wireless communication device, a transmission output control method, a storage medium, and a computer that wirelessly control wireless data so that the wireless data does not cross the wall indefinitely in the UWB communication system.・ Regarding the program.

[0003]

2. Description of the Related Art As computers have become more sophisticated, a plurality of computers have been connected to form a LAN (Local Area Network).
Is often used to share information such as files and data, share peripheral devices such as printers, and exchange information such as transfer of electronic mail and data.

In the conventional LAN, each computer is connected by wire using an optical fiber, a coaxial cable, or a twisted pair cable. However, such a wired LAN requires construction work for connection, which makes it difficult to construct the LAN easily and complicates the cable. Further, even after the LAN is constructed, the moving range of the device is limited by the cable length, which is inconvenient.

Therefore, a wireless LAN is drawing attention as a system that relieves the user from the wiring of the conventional wired LAN. According to this type of wireless LAN, most of the wired cables can be omitted in a work space such as an office, so a personal computer (P
A terminal such as C) can be moved relatively easily.

In recent years, high-speed wireless transmission technology has been studied and developed, and one example thereof is a system called UWB (Ultra Wide Band). This is, for example, 2G
1 data in the ultra wide band from Hz to 6 GHz
High-speed wireless data transmission is realized by transmitting and receiving by spreading in an extremely wide frequency band of about GHz.

In UWB, baseband transmission is performed using a signal consisting of a pulse train having a very fine pulse width (for example, 1 nsec or less). The occupied bandwidth is a band of GHz order such that a value obtained by dividing the occupied bandwidth by its center frequency (for example, 1 GHz to 10 GHz) becomes approximately 1, and is a so-called W-CDMA or cdma2000 system, and SS (Spread Spectrum). ) And OFDM (Orthogonal
Even if compared with the bandwidth normally used in a wireless LAN using the Frequency Division Multiplexing method, it is an ultra-wide band.

Further, the UWB communication system has a characteristic that the signal power density is extremely low. That is, since the data transmitted in each frequency band is as strong as noise for other wireless communication systems, it does not interfere with wireless devices that use the same frequency band, and thus can easily coexist with other systems. Is. Moreover, since the transmission power is very small, the power consumption is also small.

Further, UWB has a high time resolution by using ultra-fine pulses, and it is possible to perform "ranging" for radar and positioning by using this property. That is, UWB has three functions of position measurement, radar, and wireless communication, and can be said to be a very unique wireless application technology.

[0010]

As described above, the UW
The B communication system rarely receives interference from other systems (interference) or gives interference to other systems (interference). However, in reality, there is interference, which may cause deterioration of communication quality. In addition, UWB communication will interfere with a system that is sensitive to weak interference such as GPS (Global Positioning System).

In addition to wideband wireless communication, when communication is used indoors, cross-wall communication becomes a bottleneck.
It is unclear whether radio waves can be transmitted through the wall material, and it depends on the communication environment.

The fact that the radio waves cross the wall has the advantage that all wireless communication devices can be covered by a single wireless network at home, for example, but on the other hand, it is desirable to construct a plurality of wireless networks by finely dividing each room. If anything, it will cause interference. Also, if the wireless data unintentionally crosses the wall, it becomes easy to intercept the wireless data, which causes a security problem such as confidentiality. There is even an opinion that if you want to communicate halfway through the wall, infrared communication that does not cross the wall at all is better because it does not interfere with the adjacent room and keeps the confidentiality.

In particular, in the case of the above-mentioned UWB, a single UWB system uses all broadband frequencies, so that if unrelated UWB systems are adjacent to each other, they interfere with each other's communication. .

The present invention has been made in view of the above technical problems, and its main purpose is to provide an excellent wireless communication system and wireless communication method which overcome the problems of interference and interference.
It is intended to provide a wireless communication device, a transmission output control method, a storage medium, and a computer program.

A further object of the present invention is to provide an excellent wireless communication system and wireless communication method capable of constructing an independent wireless communication network without interfering with each other by suppressing the crossing of radio waves. It is intended to provide a wireless communication device, a transmission output control method, a storage medium, and a computer program.

[0016]

The present invention has been made in view of the above problems, and a first aspect thereof is a wireless communication device or a wireless communication device for performing wireless communication using a wideband signal. A plurality of narrow band antennas each having a communication band narrower than a wide band communication band and adapted to obtain a wide band communication band by combining the respective narrow bands, A receiving unit or step that performs a receiving process on a signal received via a plurality of narrowband antennas, and a control unit or a step that individually controls the driving of the plurality of narrowband antennas when performing wireless communication. A wireless communication device or a wireless communication method comprising:

Here, the wireless communication device or the wireless communication method according to the first aspect of the present invention performs communication by an ultra wide band (UWB) wireless signal using an impulse signal sequence composed of impulses having a predetermined impulse period. It may be performed. UWB performs baseband transmission using a signal consisting of a pulse train with an extremely fine pulse width, and spreads data over an extremely wide frequency band of about 1 GHz in an ultra wide band of, for example, 2 GHz to 6 GHz to perform high-speed transmission. Achieve data transmission.

According to the wireless communication device or the wireless communication method of the first aspect of the present invention, in wideband wireless communication such as UWB, communication is performed while controlling switching of a plurality of narrowband antennas. By performing communication using only the desired band or communication not using the undesired band, it is possible to realize suitable wireless communication according to the communication situation. For example, by switching and controlling a plurality of narrow band antennas, it is possible to perform communication while avoiding interference and interference.

Further, the wireless communication device or the wireless communication method according to the first aspect of the present invention is based on the information notified in advance, and the plurality of narrow band antennas surrounding a specific narrow band are not used. The drive of the narrow band antenna may be controlled. Therefore, when it is known in advance which frequency band another system is using, it is possible to perform communication without using that frequency band.

Further, the control section or step drives the plurality of narrow band antennas to receive a radio signal, and based on the signals received by the narrow band antennas, the frequency band corresponding to each narrow band antenna. It is also possible to infer the communication status for each and control not to use the narrow band antenna that surrounds a specific narrow band based on the estimated communication status. For example, the communication status for each frequency band can be estimated by measuring at least one of the bit error rate (BER) of the received signal and the strength (RSSI) of the received signal.

The control unit or step may switch and drive all of the plurality of narrow band antennas to receive a radio signal and estimate the communication status of each frequency band corresponding to each narrow band antenna. Alternatively, it receives radio signals without driving a specific narrow band antenna,
The communication status for each frequency band corresponding to each narrow band antenna that has received the radio signal may be estimated. Then, based on the estimated communication status, control may be performed so as not to use a narrow band antenna that surrounds a specific narrow band.

A second aspect of the present invention is a wireless communication system comprising a plurality of wireless terminals that perform wireless communication using a wide band communication band, and each wireless terminal has a bandwidth higher than the wide band communication band. A plurality of narrow band antennas each having a narrow range communication band and adapted to obtain a wide band communication band by combining the respective narrow bands, and each narrow band using the plurality of narrow band antennas The communication status of each frequency band corresponding to the antenna is estimated, antenna control information indicating that a specific frequency is not used is supplied to another wireless terminal based on the estimated communication status, and the antenna control information is received. Another wireless terminal is a wireless communication system characterized by controlling driving of the plurality of narrow band antennas so as not to use the specific frequency.

However, the term "system" as used herein refers to a logical assembly of a plurality of devices (or functional modules that realize a specific function), and each device or functional module is a single casing. It does not matter whether or not it is in the body (hereinafter the same).

According to the wireless communication system of the second aspect of the present invention, in wide band wireless communication such as UWB, communication is performed while switching control of a plurality of narrow band antennas so that only a desired band is obtained. By performing the used communication or the communication that does not use an undesired band, it is possible to realize suitable wireless communication according to the communication status. For example, each wireless terminal can perform communication while avoiding interference or interference by switching control of a plurality of narrowband antennas.

A third aspect of the present invention is a wireless communication method for performing communication with a wireless signal having a wide band communication band, each having a communication band narrower than the wide band communication band. And a step of driving one of a plurality of narrowband antennas adapted to obtain a wideband communication band by combining the narrowbands to receive a radio signal, and the driven narrowband antenna The step of measuring the communication quality of the signal received through the, and whether or not the next narrow band antenna to communicate with is present, and if there is, drive the narrow band antenna to drive the radio signal. Of the received signal and measuring the communication quality of the received signal, and when it is determined that there is no next narrowband antenna to communicate with, it is measured by driving each narrowband antenna. Comparing the signal quality, based on the comparison result, a wireless communication method characterized by comprising the steps of: determining a narrowband antenna is not used for communication, the.

According to the wireless communication method of the third aspect of the present invention, in wideband wireless communication such as UWB,
Suitable wireless communication can be realized by measuring the communication quality of each narrow band antenna while controlling the switching, and using the antenna whose communication quality is significantly deteriorated. For example, each wireless terminal can perform communication while avoiding interference or interference by switching control of a plurality of narrowband antennas.

A fourth aspect of the present invention has a plurality of communication bands each having a communication band in a narrower range than a communication band of a wide band, and combining the respective narrow bands to obtain a wide band of communication band. The process of communicating wireless signals while controlling the switching of narrowband antennas of
A computer written to run on a system
A storage medium that physically stores software in a computer-readable format, the computer software measuring the quality of a received signal received by each of the plurality of narrowband antennas; Measuring the communication quality for each of the narrow band antennas, and then determining a narrow band antenna to be used for communication based on the acquired communication quality for each of the narrow band antennas. It is a medium.

Further, a fifth aspect of the present invention is a storage medium physically storing computer software in a computer-readable format, which is described so as to execute a wireless communication process using a wideband signal on a computer system. In the wireless communication processing, a plurality of narrow band antennas each having a communication band in a range narrower than a wide band communication band, and combining the respective narrow bands to obtain a wide band communication band. A process of driving one of the two to receive a radio signal, a process of measuring the communication quality of a signal received through the driven narrow band antenna, and a process of receiving the next narrow band antenna to perform communication. A process of determining whether or not it exists, and if it exists, performing communication by driving the narrowband antenna, and measuring the communication quality of the received signal,
A process of comparing the communication quality measured by driving each narrow band antenna when it is determined that there is no next narrow band antenna to communicate with, and the narrow band not used for communication based on the comparison result. A storage medium comprising: a process of determining an antenna.

The storage medium according to each of the fourth and fifth aspects of the present invention provides computer software in a computer-readable format to a general-purpose computer system capable of executing various program codes, for example. It is a medium. Such a medium is, for example, a DVD (Di
gital Versatile Disc), CD (Compact Disc) and FD
(Flexible Disk), MO (Magneto-Optical disc), and other removable and portable storage media. Alternatively, it is technically possible to provide computer software to a specific computer system via a transmission medium such as a network (whether the network is wireless or wired).

A storage medium according to each of the fourth and fifth aspects of the present invention has the structure of the computer software and the storage medium for realizing a predetermined computer software function on a computer system, or It defines a functional collaborative relationship. In other words, by installing the predetermined computer software in the computer system via the storage medium according to the fourth and fifth aspects of the present invention, the cooperative action is exerted on the computer system. The same effects as those of the wireless communication method according to the third aspect of the present invention can be obtained.

A sixth aspect of the present invention is a wireless communication device or a transmission output control method for use in a room partitioned by a wall, for performing wireless communication using a wideband signal. A plurality of narrow band antennas each having a communication band in a range narrower than the communication band and adapted to obtain a wide band communication band by combining the narrow bands, and through the plurality of narrow band antennas. A transmission unit or step that performs a transmission process for a signal to be transmitted, and a control unit or step that individually controls the driving of the plurality of narrowband antennas so that the transmission signal does not cross the wall when performing wireless communication, A wireless communication device or a transmission output control method, comprising:

A seventh aspect of the present invention is a wireless communication system for performing wireless communication by a plurality of wireless terminals in a room partitioned by a wall using a broadband signal, and each wireless terminal is , A radio having a plurality of narrow band antennas each having a communication band in a range narrower than the wide band communication band and adapted to obtain a wide band communication band by combining the respective narrow bands. The terminal individually controls the driving of the plurality of narrowband antennas so as not to use a specific frequency over which the transmission signal exceeds the wall, and sends a wireless signal to another wireless terminal, and the other wireless terminal The wireless communication system is characterized in that the driving of the plurality of narrow band antennas is controlled so as not to use a frequency.

According to the wireless communication device or the transmission output control method and the wireless communication system according to the sixth and seventh aspects of the present invention, a predetermined wall is overcome in wide band wireless communication such as UWB. By controlling communication so as not to use a narrow band antenna that surrounds a specific narrow band, it is possible to suppress the crossing of radio wave walls and build an independent wireless communication network without interfering with each room. You can In other words, communication that does not cross the wall will be possible,
Interference does not occur even if different methods of communication are performed in the adjacent room. In such a case, a physical firewall, which is a wall for partitioning the wireless network between the rooms, can be formed, which is also a security measure.

In the case of the UWB communication system, since one communication system uses a wide band frequency, there is a problem of interference when another uncoordinated UWB system is present nearby. On the other hand, according to the wireless communication device or the transmission output control method and the wireless communication system according to the sixth and seventh aspects of the present invention, each room is different by limiting the crossing of wireless data. By arranging the communication system described above and connecting the rooms by wire or the like, it is possible to build a wireless home network that covers the entire house.

An eighth aspect of the present invention is a radio communication apparatus or a transmission output control method for performing radio communication using a wide band signal, which is a pulse width control unit for controlling the pulse width of a transmission signal or A step, a wireless transmission section or step for transmitting a wireless signal in a frequency band corresponding to the controlled pulse width, and a filter control section or step for controlling the frequency band received by the wireless reception section, The pulse width control section or step controls the pulse width of the transmission signal so that the transmission signal has a desired frequency band, which is a radio communication device or a transmission output control method.

Here, when the wireless communication environment is constructed in the room partitioned by the wall, the pulse width control section or step sets the pulse width so that the frequency band does not exceed the transmission signal from the wall. It may be controlled.

A ninth aspect of the present invention is a radio communication system for performing radio communication by a plurality of radio terminals in a room partitioned by a wall using a broadband signal, each radio terminal being , A wireless terminal that transmits and receives a radio signal in a frequency band corresponding to a predetermined pulse width and sends a radio signal controls the pulse width of the transmission signal so that the transmission signal does not use a specific frequency band that exceeds the wall. The wireless communication system transmits a wireless signal to the wireless terminal, and the other wireless terminals receive a frequency band corresponding to a pulse width that does not use the specific frequency.

The higher the frequency, the greater the attenuation of radio waves by the wall and the more the wall does not pass through. Therefore, if the user knows the attenuation characteristic of the wall in advance, it is possible to prevent the communication over the wall by arbitrarily controlling not to use the antenna of a certain frequency band. On the other hand, there is a fixed relationship between the communication band and the pulse width, and the communication band to be used shifts to the higher frequency band as the pulse width becomes smaller.

According to the radio communication device, the transmission output control method, and the radio communication system according to the eighth and ninth aspects of the present invention, the principle established between the pulse width and the communication band is utilized. As a result, on the transmission side, the frequency band used for communication can be variably adjusted by controlling the pulse width.

Further, by utilizing the principle established between the pulse width and the communication band as described above, the pulse width of the transmission signal is controlled to set the transmission signal to a specific frequency band, thereby preventing the radio wave from crossing the wall. Can be suppressed. According to the wireless communication device, the transmission output control method, and the wireless communication system according to the eighth and ninth aspects of the present invention, in wideband wireless communication such as UWB, a frequency at which a transmission signal does not exceed a wall. By transmitting the radio signal while controlling the pulse width to be the band, it is possible to suppress the crossing of the radio wave wall and construct an independent radio communication network without interfering with each room. Therefore, communication that does not cross the wall becomes possible, and even if communication of different systems is performed in the adjacent room, no interference occurs. In such a case, a physical firewall, which is a wall for partitioning the wireless network between the rooms, can be formed, which is also a security measure.

In the case of the UWB communication system, one communication system uses a wide band frequency, and thus there is a problem of interference when another uncoordinated UWB system is present nearby. On the other hand, according to the wireless communication device or the transmission output control method and the wireless communication system according to each of the eighth and ninth aspects of the present invention, each room is different by limiting the wireless data barrier. By arranging the communication system described above and connecting the rooms by wire or the like, it is possible to build a wireless home network that covers the entire house.

Further, the tenth aspect of the present invention is described so as to be used in a room partitioned by a wall, and to execute a process for controlling a transmission output by using a broadband signal on a computer system. A storage medium that physically stores the computer software in a computer-readable format, the computer software having a communication band narrower than a wideband communication band, and matching each narrow band. A transmission step of driving one of a plurality of narrowband antennas to obtain a wideband communication band by performing a transmission process of a radio signal;
A radio signal is provided by driving one of a plurality of narrow-band antennas each having a communication band in a range narrower than the wide-band communication band and obtaining a wide-band communication band by combining the respective narrow bands. The receiving step of performing the receiving process of (1) and driving of the plurality of narrow band antennas so that the wireless signal to be transmitted in performing wireless communication does not use a narrow band antenna that surrounds a specific narrow band that crosses a predetermined wall And a control step for individually controlling the storage medium.

Further, the eleventh aspect of the present invention is a computer-readable physical form of computer software written so as to execute a process for controlling a transmission output using a wideband signal on a computer system. The computer software stores a pulse width control step for controlling a pulse width of a transmission signal, and a radio transmission step for transmitting a radio signal in a frequency band corresponding to the controlled pulse width. And a radio reception step of receiving and processing a radio signal of a predetermined frequency band, and a filter control step of controlling the frequency band received by the radio reception unit, wherein the pulse width control step is performed so that the transmission signal has a desired frequency band. The storage medium is characterized in that the pulse width of the transmission signal is controlled so that

The storage medium according to each of the tenth and eleventh aspects of the present invention provides computer software in a computer-readable format to a general-purpose computer system capable of executing various program codes, for example. It is a medium. Such a medium is, for example, a DVD.
(Digital Versatile Disc), CD (Compact Disc), FD (Flexible Disk), MO (Magneto-Optical dis)
It is a removable and portable storage medium such as c). Alternatively, it is technically possible to provide computer software to a specific computer system via a transmission medium such as a network (whether the network is wireless or wired).

A storage medium according to each of the tenth and eleventh aspects of the present invention is the structure of the computer software and the storage medium for realizing a predetermined computer software function on a computer system, or It defines a functional collaborative relationship. In other words, the predetermined computer software is installed in the computer system via the storage medium according to each of the tenth and eleventh aspects of the present invention, whereby the cooperative action is exerted on the computer system. A wireless communication device or a transmission output control method according to a sixth aspect of the present invention,
In addition, it is possible to obtain the same effects as the wireless communication device or the transmission output control method according to the eighth aspect of the present invention.

Further, the twelfth aspect of the present invention is described so as to be used in a room partitioned by a wall and to execute a process for controlling a transmission output by using a broadband signal on a computer system. A plurality of narrow-band antennas each having a communication band narrower than the wide-band communication band and adapted to obtain a wide-band communication band by combining the respective narrow bands. A transmission step of driving one to perform a transmission process of a radio signal, and a communication band having a range narrower than a wide band communication band, respectively, and obtaining a wide band communication band by combining the narrow bands. The receiving step of driving one of the plurality of narrow band antennas to perform the receiving process of the wireless signal and the wireless signal to be transmitted in performing the wireless communication are performed. And a control step for individually controlling the driving of the plurality of narrow band antennas so as not to use a narrow band antenna that surrounds a specific narrow band that crosses the wall of the computer. Is.

A thirteenth aspect of the present invention is a computer program written to execute a process for controlling a transmission output using a wideband signal on a computer system. A pulse width control step for controlling a pulse width, a wireless transmission step for transmitting a wireless signal in a frequency band corresponding to the controlled pulse width, a wireless reception step for receiving a wireless signal in a predetermined frequency band, And a filter control step of controlling a frequency band received in the wireless reception unit,
In the pulse width control step, the pulse width of the transmission signal is controlled so that the transmission signal has a desired frequency band, which is a computer program.

A computer program according to each of the twelfth and thirteenth aspects of the present invention defines a computer program written in a computer-readable format so as to realize a predetermined process on a computer system. . In other words, by installing the computer program according to each of the twelfth and thirteenth aspects of the present invention in the computer system, a cooperative action is exerted on the computer system, and the sixth aspect of the present invention.
It is possible to obtain the same effects as those of the wireless communication device or the transmission output control method according to the above aspect, and the wireless communication device or the transmission output control method according to the eighth aspect of the present invention.

Still other objects, features and advantages of the present invention are as follows.
It will be apparent from the embodiments of the present invention described later and the more detailed description based on the accompanying drawings.

[0050]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 schematically shows the hardware configuration of a wireless communication device 100 that operates favorably in the wireless communication system according to the present invention.

The radio communication device 100 includes a plurality of narrow band antennas 10 that cover a range narrower than the band for communication.
1 to 104 are provided. These narrow band antennas 10
Reference numerals 1 to 104 denote central control units 10 via the selector 105.
9, the selector 105 is connected to the central control unit 1
09 to an arbitrary narrow band antenna 101-
The wireless communication can be performed by selecting 104.

The selector 105 is connected to the switch circuit 106 that operates under the control of the central control unit 109. Further, one end of the switch circuit 106 is connected to the central control unit 1
The wireless communication unit 107 is connected to the wireless reception unit 107 that operates under the control of the wireless communication terminal 09, and the other end is connected to the wireless transmission unit 108 that operates under the control of the central control unit 109. In the present embodiment, the switch circuit 106 connects the wireless reception unit 107 and the wireless transmission unit 108 to the selector 105 by a time division method, and switches the reception operation and the transmission operation.

FIG. 2 compares the communication band used in the wide band communication system to which the present invention is applied with each narrow band handled by the narrow band antennas 101 to 104 in the present embodiment.

FIG. 2A shows a communication band used in wide band communication. As you can see from the figure,
In this wide band communication, the communication band from 1 GHz to 5 GHz is occupied and it has a special antenna shape. UW
In the B communication system, this kind of communication band is actually used.

Further, FIG. 2B shows the narrow band antenna 1
Each of the narrow bands handled in 01 to 104 is shown. As shown in the figure, each narrow band has a patch shape. The narrow band antenna 101 has a band of 1 GHz to 2 GHz, and the narrow band antenna 102 has a band of 2 GHz to 3 GHz.
Narrow band antenna 103 from 3 GHz to 4 GH
z band, narrow band antenna 104 from 4 GHz to 5G
Each of them covers the Hz band, and by combining these narrow bands, a broadband communication band equivalent to that shown in FIG. 2A can be obtained.

According to the device configuration as shown in FIG. 1, the selector 105 performs the switching operation based on the command from the central control unit 109, so that the narrow band antenna 10 is
Any antenna out of 1 to 104 can be selectively driven. Therefore, for example, when the user does not want to use the communication band of 2 GHz to 3 GHz for some reason, the narrow band antenna 1 corresponding to this communication band is used.
The other narrow band antenna 10 without driving 02.
Communication may be performed using only 1, 103, 104.

In wide band transmission such as the UWB communication system, performing such transmission is S / N (signal to noise).
It does degrade the ratio slightly, but it does not result in missing information. For example, it is known that communication by another communication method is already being performed in the area using the communication method according to the present embodiment, and when it is desired to prioritize the communication, the use like a carrier hole is desired by the user. Method becomes possible. Further, when the power of another communication system is large, it is often preferable to avoid communication in that band for better communication.

Further, as a general theory, the higher the frequency, the greater the attenuation of radio waves by the wall, so that the wall does not pass through. If the user knows the attenuation characteristics of the wall in advance, it is possible to prevent communication over the wall by controlling not to use an antenna in a certain frequency band. By suppressing the crossing of the radio wave wall, it is possible to build an independent wireless communication network without interfering with each other in each room, and also to form a physical firewall to partition the wireless network between rooms. can do.

FIG. 3 schematically shows the hardware configuration of a radio communication device 100-2 according to another embodiment of the present invention. The wireless communication device 100-2 differs from the wireless communication device 100 shown in FIG. 1 in that a communication quality measuring circuit 301 is further provided. The other functional modules are substantially the same as those having the same reference numerals in FIG. 1, and therefore the description thereof is omitted here.

The communication quality measuring circuit 301 receives the output of the switch circuit 106, measures the communication quality of the output, and supplies the measurement result to the central control unit 109. The control of the communication quality measuring circuit 301 is performed by the central control unit 1
09.

The received signal received by at least one of the narrow band antennas 101 to 104 is input to the communication quality measuring circuit 301 and the radio receiving section 107 via the selector 105 and the switch circuit 106.

The communication quality measuring circuit 301 measures the communication quality and the like from the input received signal and outputs the measurement result to the central control unit 109. Upon receiving the measurement result from the communication quality measuring circuit 301, the central control unit 109 sends the next antenna switching control command to the selector 105, and performs reception by the next selected narrow band antenna.
Similarly, all selected narrowband antennas 101
After measuring the communication quality of each of the antennas 104 to 104, the central control unit 109 determines which antenna is used for communication based on the acquired communication quality of each of the narrow band antennas 101 to 104.

Under a predetermined communication environment, the wireless communication device 100-
Before installing No. 2, the communication quality of each of the antennas 101 to 104 is measured, and if there is an antenna whose communication quality is significantly deteriorated, it is determined that the frequency band of the antenna has some deterioration factor. Then, after that, it is possible to perform communication control that the antenna is not used.

Further, in a certain room, the wireless communication device 100-
Before installing 2, install only the receiver in the next room over the wall and switch the antenna to be used in order to measure the communication quality to prevent the wall from crossing unless you use any frequency band. You can determine if you can. The higher the frequency, the greater the amount of attenuation of radio waves by the wall, so that it will not pass through the wall. Appropriate communication control may be performed based on such measurement results.

FIG. 4 shows an example of the internal configuration of the communication quality measuring circuit 301 shown in FIG. As shown in the figure, the communication quality measuring circuit 301 employs a Viterbi decoding system, which is one of the error correction techniques widely adopted in mobile communication systems, and is used as a Viterbi decoder 402. , Convolutional encoder 403, and comparison unit 4
It is equipped with 04. The Viterbi decoding system has a function of reproducing a maximum likelihood, that is, a stochastic most probable data string from data in which noise is mixed. In other words, the transmission side first performs convolutional coding on the transmission data and then transmits the data, and the reception side performs Viterbi decoding, so that communication can be performed with error occurrence suppressed even in a communication environment with poor transmission quality. it can.

In FIG. 4, the input terminal 401 corresponds to the input terminal of the communication quality measuring circuit 301 itself. This input end 40
The received signal input from 1 is input to the Viterbi decoder 402 and the comparator 404. The Viterbi decoder 402 reproduces the stochastic most probable data sequence from the data in which noise is mixed, and outputs it to the convolutional encoder 403. The convolutional encoder 403 performs the same convolutional encoding as the convolutional encoding performed on the transmitting side, and outputs the result to the comparator 404. In the comparator 404, the signal directly input from the input terminal 401,
The signal input from the convolutional coding 403 is compared, the number of unmatched data is counted, and the result is output from the output terminal 405.

That is, in the comparator 404, assuming that the output of the Viterbi decoder 402 is 100% error-corrected and has no error, the output is re-convolutionally encoded by the convolutional encoder 403. The result is compared with the received signal at the input terminal 401, and the error of the received signal is counted. That is, by comparing a certain number of received data by this method and comparing the received data with the number of errors, a simple bit error rate BER (Bi
t Error Rate) can be measured.

Another example of the communication quality measuring circuit 301 is to measure the strength (RSSI) of the received signal. There are various possible methods for measuring the intensity of the received signal. For example, in the case of the phase modulation method, after separating the input on the receiving side into Ich (in-phase component) and Qch (quadrature component),
It is well known that each of them is squared and added, and the value of I ² + Q ² is used as the strength of the received signal. By measuring the strength of the received signal inside the communication quality measuring circuit 301,
When there is interference from another system, the signal strength may increase, so that the antenna drive can be controlled so as to avoid the communication band.

FIG. 5 shows, in the form of a flow chart, an operation procedure of communication control when the communication quality measuring circuit 301 (see FIG. 4) for performing BER measurement is used. Such control operation is actually realized by the form in which the central control unit 109 executes a predetermined program code. Hereinafter, the operation procedure of communication control in the wireless communication device 100-2 will be described with reference to this flowchart.

During communication, the control module on the receiving side starts a communication status estimating operation (step S1).
Explaining the configuration example shown in FIG. 3, first, the central control unit 10
9 is a narrow band antenna 101 by switching the selector 105.
It can be received only by itself (step S2). The communication quality measurement circuit 301 performs BER measurement in this communication state (step S3), and sends the measurement result to the central control unit 109 and stores it (step S4).

Then, it is judged whether or not there is still a narrow band antenna to be measured next (step S5).
In the example shown in FIG. 3, since the number of remaining antennas is 3, the narrow band antenna 102 is selected as the next antenna, and the selector 105 is configured to perform reception only by this antenna 102.
Is switched (step S6). After this, step S3
Then, the BER measurement is performed again, and the same control is repeatedly executed.

When the antenna switching is completed,
The determination result of step S5 is "No", and step S7
Process shifts to. That is, the communication quality is sequentially measured from the narrow band antenna 101, and the last narrow band antenna 1
When the BER measurement of 04 is completed, the process proceeds to step S7.

In step S7, B measured so far
The ER results are compared to determine whether or not there is an antenna whose BER is significantly deteriorated (step S8).
Here, when there is an antenna whose BER is significantly deteriorated, it is determined that there is some deterioration factor in the frequency band of the antenna, and communication control is performed so that the antenna is not used thereafter. (Step S1
0). At the same time, the control module on the transmission side is notified of unused antennas (step S11).

On the other hand, in the determination result of step S8,
If there is no particular antenna whose BER is significantly deteriorated and all the antennas have the same BER, communication is performed using all the antennas thereafter (step S
9).

Further, FIG. 6 shows, in the form of a flow chart, the operation procedure of communication control when a communication quality measuring circuit for performing RSSI measurement is used. Such control operation is actually performed by the central control unit 109 by a predetermined program.
It is implemented in the form of executing code. Hereinafter, with reference to this flowchart, the wireless communication device 100-
The operation procedure of communication control in 2 will be described.

During communication, the control module on the receiving side starts a communication status estimating operation (step S2).
1). Explaining with the configuration example shown in FIG. 3, first, the central control unit 109 switches the selector 105 so that only the narrow band antenna 101 can receive (step S2).
2). Communication quality measurement circuit 301 is
I measurement is performed (step S23), and the measurement result is sent to the central control unit 109 and stored (step S24).

Then, it is judged whether or not there is still a narrow band antenna to be measured next (step S2).
5). In the example shown in FIG. 3, since the remaining number of antennas is 3, the narrowband antenna 102 is selected as the next antenna and the selector 105 is switched so that reception is performed only by this antenna 102 (step S26). After that, the process returns to step S23, RSSI measurement is performed again, and the same control is repeatedly executed.

When the antenna switching is completed,
The determination result in step S25 is "No", and step S25
The processing moves to 27. That is, the narrow band antenna 10
The communication quality is sequentially measured from 1, and when the RSSI measurement of the last narrowband antenna 104 is completed, the step S2 is performed.
The process moves to 7.

In step S27, the RSSI results measured so far are compared to determine whether or not there is an antenna whose RSSI is significantly deteriorated (step S).
28). Here, when there is an antenna whose RSSI is significantly deteriorated, it is determined that there is some deterioration factor in the frequency band of the antenna, and communication control is performed so that the antenna is not used thereafter. (Step S30). At the same time, the control module on the transmission side is notified of unused antennas (step S3).
1).

On the other hand, in the determination result of step S28, if there is no particular antenna whose RSSI is significantly deteriorated and all the antennas have the same RSSI, then communication is performed using all the antennas. (Step S29).

FIG. 7 shows, in the form of a flowchart, an operation procedure for controlling the communication radio wave so as not to cross the wall based on the communication quality measurement result obtained by the communication quality measuring circuit. Such control operation is actually realized by the form in which the central control unit 109 executes a predetermined program code. Hereinafter, the operation procedure of communication control in the wireless communication device 100-2 will be described with reference to this flowchart.

During communication, the control module on the receiving side starts a communication status estimating operation (step S4).
1). Explaining with the configuration example shown in FIG. 3, first, the central control unit 109 switches the selector 105 so that transmission and reception can be performed only by the narrow band antenna 101 (step S4).
2). On the other hand, on the receiver side installed in the next room over the wall, the communication quality measuring circuit 301 sets the BER in this state.
Alternatively, RSSI measurement is performed (step S43) to check whether the emitted radio wave in the corresponding narrow band crosses the wall. Then, the measurement result is sent to the central control unit 109 and stored (step S44).

Then, it is judged whether or not the narrow band antenna to be measured next is still present (step S4).
5). In the example shown in FIG. 3, since the number of remaining antennas is 3, the narrowband antenna 102 is selected as the next antenna and the selector 105 is switched so that reception is performed only by this antenna 102 (step S46). After this, the process returns to step S23, and B is again received at the receiver over the wall.
ER or RSSI measurement is performed, and the same control is repeatedly executed.

When the antenna switching is completed,
The determination result in step S45 is "No", and step S45
Then, the processing shifts to 47. That is, the narrow band antenna 10
The communication quality is sequentially measured from 1, and when the BER or RSSI measurement of the last narrowband antenna 104 is completed, the process proceeds to step S47.

In step S47, it is determined whether or not there is an antenna that is crossing the wall based on the results of the BER or RSSI measured so far (step S).
48). Here, if there is an antenna that is crossing the wall, communication control is performed so that the antenna will not be used thereafter (step S50). At the same time, the control module on the transmission side is notified of the unused antenna (step S51).

On the other hand, if it is determined in step S48 that there is no particular antenna that is crossing the wall, then communication is performed using all antennas (step S49).

In each of the flowcharts shown in FIGS. 5 to 7, the antennas are switched one by one from 101 to 104, but the following combinations are also possible. That is, 1) antennas 101, 102, 103 2) antennas 101, 102, 104 3) antennas 101, 103, 104 4) antennas 102, 103, 104

B using each combination of antennas described above
Measure ER and so on. Then, for example, if the BER in the combination of 1) is extremely good, it can be determined that there is some deterioration factor in the frequency band of the antenna 104, and therefore communication control can be performed without using that frequency band. . Alternatively, it is possible to perform communication control so as not to use a frequency band formed by a combination of antennas in which a radio wave crossing a wall is detected in a receiver crossing the wall.

Further, as another application example, if the antenna control information detected at the time of reception is transmitted to the transmitting side and the antenna whose quality has deteriorated is not used as the transmitting antenna, the transmitting antenna will not be used. It is possible to prevent the interference that has been given to the system. Similarly, by performing control so that the antenna over the wall is not used as a transmission antenna, the transmission / reception area can be limited to a specific room, and secure data communication can be performed. It does not interfere with other communication systems built in another room.

Further, as another system, for example, when it is determined that the antenna 104 should not be used in the above-mentioned control on the receiving side, this antenna control information is notified to all the other systems communicating. Thus, if the same control is performed in other terminals, suitable communication can be performed.

In short, according to the wireless communication device 100 of this embodiment, when performing wideband wireless communication such as UWB communication, the communication is performed while controlling the switching of a plurality of narrowband antennas. It is possible to perform communication using only the band to be used and communication not to use the band that is not desired, and it is possible to realize suitable communication according to the communication situation.

By the way, the higher the frequency, the greater the attenuation of radio waves by the wall, and the more the wall does not pass through. Therefore, if the user knows the attenuation characteristic of the wall in advance, it is possible to prevent the communication over the wall by arbitrarily controlling not to use the antenna of a certain frequency band.

On the other hand, there is a fixed relationship between the communication band and the pulse width, and the communication band to be used shifts to the higher frequency band as the pulse width becomes smaller. FIG. 8 shows the relationship between the pulse width and the communication band. In the figure, the pulse A is a pulse having a large pulse width, and for example, the frequency band is from 1 GHz to 3 GHz. In contrast,
In the case of the pulse B having a small pulse width, it is shown that the frequency band is higher and wider than 1.5 GHz to 6 GHz.

By utilizing the principle established between the pulse width and the communication band, it is possible to suppress the radio wave from crossing the wall. That is, on the transmission side, the frequency band used for communication is variably adjusted by controlling the pulse width so that it does not pass through the wall. On the receiving side, the reception processing may be performed using an optimum bandpass filter including the frequency band. In such a case, the method of selecting the frequency may be the same as the method of selecting the narrowband antenna described above.

FIG. 9 shows the configuration of the radio transmission section 108 capable of controlling the pulse width. In the example shown in the figure, the wireless transmission unit 108 employs a Bi-phase modulation system, which is one of UWB communication systems, and includes a time base 201, a pulse generator 202, and a pulse control circuit 2.
03, a multiplier 204, an information source 205, and an output stage 207.

The time base 201 produces a periodic timing signal. It has a voltage controlled generator circuit with high timing accuracy on the order of picoseconds. This frequency timing signal is used by the pulse generator 202 as well as the information source 20.
Input to 5.

The pulse generator 202 is capable of generating a very narrow pulse of the order of picoseconds, arbitrarily generates a pulse having a pulse width in accordance with the instruction of the pulse control circuit 203, and outputs it from the time base 201. The supplied periodic timing signal is monitored and a signal is generated in synchronization with it.

The multiplier 204 multiplies the ultrafine pulse generated by the pulse generator 202 in time with the output of the information source 205. Then, the transmission output is controlled so that the antenna 101 radiates it into the air.

Further, FIG. 10 schematically shows the structure of the radio receiving section 107 when the Bi-phase method is adopted. The wireless reception unit 107 can receive and process a radio wave including a pulse having a pulse width controlled as described above.

U input from the antennas 101 to 104
The WB signal enters the multipliers 302 and 304 through the bandpass filter unit 311.

The bandpass filter section 311 can vary the band and filter the received signal under the control of the filter control section 312. For example, it is possible to have a plurality of filters having a plurality of bands and switch them, or a system that can electrically change the bands.

The received signal that has passed through the bandpass filter unit 311 is sent to the multiplier 302 in the punctual circuit 30.
8 is multiplied by the signal output from the signal No. 8, further despread, integrated by the low-pass filter 303, and output as demodulated data.

On the other hand, the received signals at the antennas 101 to 104 are also inputted to the multiplier 304, and here, they are multiplied by the signal outputted from the selector 311 and the result is inputted to the low pass filter 305 and integrated. ,
The output is input to the DLL circuit 306.

The output of the DLL circuit 306 is a signal corresponding to the timing difference between the received signal and the signal generated inside the receiver, and this timing signal is input to the code source 307 which generates the signal.

The signal output from the code source 307 includes an Early circuit 309 for generating a signal that is advanced by half the time interval (chip rate) of this signal, a Late circuit 310 for generating a delayed signal, and a correct timing. Is input to each of the Punctual circuits 308 for generating. The outputs of the Early circuit 309 and the Late circuit 310 are input to the selector 311 in this example, controlled in time division, and input to the multiplier 304.

Further, FIG. 11 shows, in the form of a flowchart, an operation procedure for controlling the communication radio wave so as not to cross the wall by controlling the pulse width in the radio transmission section 108. Such control operation is actually realized by the form in which the central control unit 109 executes a predetermined program code. Hereinafter, the operation procedure of communication control in the wireless communication device 100-2 will be described with reference to this flowchart.

During communication, the control module on the receiving side starts a communication status estimating operation (step S6).
1). First, the central control unit 109 enables transmission with a default pulse width (step S62). On the other hand, on the receiver side installed in the adjacent room over the wall, the communication quality measuring circuit 301 performs BER or RSSI measurement in this state (step S63), and the radio wave emitted in the corresponding narrow band crosses the wall. Check if it is occurring. This measurement result is sent to the central control unit 109 and stored (step S64).

Then, it is determined whether or not the pulse width of the transmitted radio wave to be measured next is still present (step S6).
5). In the example shown in FIG. 9, the pulse control circuit 203 indicates the next pulse width to the pulse generator 202 (step S
66). After that, returning to step S63, the BER or RSSI measurement is again performed in the receiver over the wall,
Repeat similar control.

When the pulse width is changed to the end,
The determination result of step S65 is "No", and step S
The processing moves to 67. That is, when the BER or RSSI measurement is completed for all the pulse widths that can be designated, the process proceeds to step S67.

In step S67, it is determined based on the BER or RSSI results measured so far whether there is a pulse width causing a wall crossing or a frequency band corresponding thereto (step S68). Here, if there is a frequency band that causes wall crossing, the pulse width is determined so that the frequency band will not be used thereafter (step S70). At the same time, the control module on the transmission side is notified of the unused pulse width or the corresponding frequency band (step S71).

On the other hand, if it is determined in step S68 that there is no particular frequency band causing the wall crossing, communication is performed using all frequency bands thereafter (step S69).

[Supplement] The present invention has been described in detail with reference to the specific embodiments. However, it is obvious that those skilled in the art can modify or substitute the embodiments without departing from the scope of the present invention. That is, the present invention has been disclosed in the form of exemplification, and the contents of this specification should not be construed in a limited manner. In order to determine the gist of the present invention, the section of the claims described at the beginning should be taken into consideration.

[0114]

As described above in detail, according to the present invention,
An excellent wireless communication system and wireless communication method, a wireless communication device, a transmission output control method, and a memory that overcome the problems of interference and interference by performing communication while switching control of a plurality of narrowband antennas A medium as well as a computer program can be provided.

Further, according to the present invention, when it is known which frequency band is used by another system,
It is possible to perform wireless communication without using the frequency band.

Further, according to the present invention, since the communication status can be grasped by measuring the BER and RSSI during communication, it is possible to perform wireless communication without using an inappropriate frequency band.

Further, according to the present invention, by transmitting the antenna control information on the receiving side to the transmitting side, it is possible to stop the interference which may have affected other systems.

Further, according to the present invention, an excellent wireless communication system and wireless communication method can be constructed in which an independent wireless communication network can be constructed without interfering with each other by suppressing the crossing of radio wave walls. , A wireless communication device, a transmission output control method, a storage medium, and a computer program can be provided.

According to the present invention, it is possible to perform communication without crossing the wall, and no interference occurs even if communication of different systems is performed in the adjacent room. In such a case, a physical firewall, which is a wall for partitioning the wireless network between the rooms, can be formed, which is also a security measure.

In the case of the UWB communication system, one communication system uses a wide band frequency, so that there is a problem of interference when another uncoordinated UWB system is present nearby. According to the present invention, a wireless home network that covers the entire house by limiting the crossing of wireless data walls, arranging different communication methods for each room, and connecting each room by wire or the like. Can be built.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a hardware configuration of a wireless communication device 100 that preferably operates in a wireless communication system according to the present invention.

FIG. 2 is a chart comparing a communication band used in a wide band communication system to which the present invention is applied with each narrow band handled by the narrow band antennas 101 to 104 in the present embodiment.

FIG. 3 is a wireless communication device 10 according to another embodiment of the present invention.
It is the figure which showed the hardware constitutions of 0-2 typically.

FIG. 4 is a diagram showing an example of an internal configuration of a communication quality measuring circuit 301.

FIG. 5 is a flowchart showing an operation procedure of communication control when a communication quality measuring circuit 301 for performing BER measurement is used.

FIG. 6 is a flowchart showing an operation procedure of communication control when a communication quality measuring circuit for performing RSSI measurement is used.

FIG. 7 is a flowchart showing an operation procedure for controlling communication radio waves so as not to cross a wall based on a communication quality measurement result using a communication quality measuring circuit.

FIG. 8 is a chart showing the relationship between pulse width and communication band.

FIG. 9 is a wireless transmitter 1 capable of controlling a pulse width.
It is the figure which showed the structure of 08.

FIG. 10 is a diagram schematically showing a configuration of a wireless reception unit 107 when the Bi-phase method is adopted.

FIG. 11 is a flowchart showing an operation procedure for controlling a communication radio wave so as not to cross a wall by controlling a pulse width in the wireless transmission unit.

[Explanation of symbols]

100 ... Wireless communication devices 101 to 104 ... Narrow band antenna 105 ... Selector 106 ... Switch circuit 107 ... Wireless receiving unit 108 ... Wireless transmitting unit 109 ... Central control unit 201 ... Time base, 202 ... Pulse generator 203 ... Pulse control circuit 204 ... Multiplier, 205 ... Information source 301 ... Communication quality measuring circuits 302, 304 ... Multipliers 303, 305 ... Low-pass filter 306 ... DLL circuit, 307 ... Code source 308 ... Puinctual circuit, 309 ... Early
Circuit 310 ... Late circuit, 311 ... Bandpass filter 402 ... Viterbi decoder 403 ... Convolutional encoder 404 ... Comparison unit

Continued front page    (72) Inventor Hiroaki Takano             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F term (reference) 5K022 EE01 EE11 EE21 EE31                 5K067 AA01 AA23 BB02 CC01 CC02                       CC10 DD34 EE02 EE10 JJ21                       JJ38 KK01 KK03

Claims (33)

[Claims] 1. A wireless communication device for performing wireless communication using a wideband signal, each having a communication band in a range narrower than a wideband communication band, and combining the respective narrow bands to provide a wideband. A plurality of narrow band antennas adapted to obtain the communication band, a receiving unit that performs a reception process on a signal received through the plurality of narrow band antennas, and a plurality of the narrow band antennas for performing wireless communication. A wireless communication device comprising: a control unit that individually controls driving of an antenna. 2. The wireless communication device according to claim 1, wherein communication is performed by an ultra wide band (UWB) wireless signal using an impulse signal sequence composed of impulses having a predetermined impulse period. 3. The control unit controls the driving of the plurality of narrow band antennas so as not to use a narrow band antenna that surrounds a specific narrow band based on previously notified information. The wireless communication device according to claim 1. 4. The control unit drives the plurality of narrow band antennas to receive a radio signal, and based on the signals received by the narrow band antennas, for each frequency band corresponding to each narrow band antenna. The wireless communication device according to claim 1, wherein the communication status is estimated, and control is performed based on the estimated communication status so that a narrow band antenna that surrounds a specific narrow band is not used. 5. The control unit switches and drives all of the plurality of narrow band antennas to receive a radio signal, estimates the communication status of each frequency band corresponding to each narrow band antenna, and estimates the communication status. Based on the communication status, control not to use a narrow band antenna that surrounds a specific narrow band,
The wireless communication device according to claim 4, wherein 6. The bit error rate (B
The wireless communication device according to claim 4, wherein the communication status for each frequency band is estimated by measuring at least one of ER) and received signal strength (RSSI). 7. The control unit receives a radio signal without driving a specific narrow band antenna among the plurality of narrow band antennas, and corresponds to each narrow band antenna that has received the radio signal. Estimate the communication status for each frequency band,
The wireless communication device according to claim 4, wherein control is performed so that a narrow band antenna that surrounds a specific narrow band is not used based on the estimated communication status. 8. A wireless communication system comprising a plurality of wireless terminals that perform wireless communication using a wide band communication band, each wireless terminal having a communication band narrower than the wide band communication band. And a plurality of narrow band antennas adapted to obtain a wide communication band by combining the respective narrow bands, and using the plurality of narrow band antennas, communication for each frequency band corresponding to each narrow band antenna The situation is estimated, and antenna control information indicating that a specific frequency is not used is supplied to another wireless terminal based on the estimated communication situation, and the other wireless terminal receiving the antenna control information receives the specific frequency. The wireless communication system is characterized in that the driving of the plurality of narrow band antennas is controlled so as not to use. 9. A wireless communication method for communicating with a wireless signal having a wide band communication band, each having a communication band narrower than the wide band communication band, and matching each narrow band. A wireless communication signal by driving one of a plurality of narrow band antennas to obtain a wide band communication band, and the communication quality of the signal received through the driven narrow band antenna. And measuring whether there is a next narrow band antenna to communicate with, if there is, drive the narrow band antenna to receive the radio signal, and communicate the received signal. The step of measuring the quality and the step of comparing the communication quality measured by driving each narrow band antenna when it is determined that there is no next narrow band antenna to communicate with And a step of determining a narrowband antenna not used for communication based on the comparison result. 10. A wireless communication method for performing communication with a wireless signal having a wide band communication band, each having a communication band narrower than the wide band communication band, and matching each narrow band. By doing so, a step of performing reception processing on a signal received through a plurality of narrow band antennas that obtains a wide communication band, and individually controlling the driving of the plurality of narrow band antennas when performing wireless communication A wireless communication method, comprising: 11. An ultra wide band (UWB) radio signal using an impulse signal train having a wide communication band and consisting of impulses having a predetermined impulse period is used for communication. Described wireless communication method 12. The wireless communication according to claim 10, wherein the controlling step controls not to use a narrow band antenna that surrounds a specific narrow band based on previously notified information. Method 13. The controlling step corresponds to each of the narrow band antennas based on a sub step of driving a plurality of narrow band antennas to receive a radio signal and a radio signal received in the receiving step. A substep of estimating the communication status for each frequency band, and a substep of controlling not to use a narrowband antenna surrounding a specific narrowband based on the communication status estimated in the estimating step. The wireless communication method according to claim 10, characterized in that 14. The wireless communication method according to claim 13, wherein in the receiving step, all the plurality of narrow band antennas are switched and driven to receive a wireless signal. 15. The wireless communication method according to claim 13, wherein in the receiving step, the wireless signal is received without driving a specific narrow band antenna among the plurality of narrow band antennas. 16. A plurality of narrow band antennas each having a communication band narrower than a wide band communication band and adapted to obtain a wide band communication band by combining the respective narrow bands while controlling switching. A storage medium that physically stores computer software in a computer-readable format that is described to execute a process of communicating a wireless signal on a computer system, wherein the computer software comprises the plurality of narrow bands. Measuring the quality of the received signal received by each of the antennas, after measuring the communication quality for each of the plurality of narrow band antennas, based on the communication quality for each acquired narrow band antenna, communication And a step of determining a narrow band antenna to be used for the storage medium. 17. A storage medium that physically stores computer software in a computer-readable format, which is written so as to execute a wireless communication process using a wideband signal on a computer system. , Driving one of a plurality of narrow band antennas each having a communication band in a range narrower than the wide band communication band, and obtaining a wide band communication band by combining the respective narrow bands. A process of receiving a radio signal, a process of measuring the communication quality of a signal received via the driven narrow band antenna, and a judgment as to whether or not there is a next narrow band antenna to communicate with. , If it exists, the narrowband antenna is driven to perform communication and the communication quality of the received signal is measured, and the next narrowband antenna to communicate exists. When it is determined that there is no narrow band antenna, it includes a process of comparing the communication quality measured by driving each narrow band antenna, and a process of determining a narrow band antenna not used for communication based on the comparison result. A storage medium characterized by the above. 18. A wireless communication device for use in a room partitioned by a wall, for performing wireless communication using a wideband signal, each having a communication band narrower than a wideband communication band, And, a plurality of narrow band antennas to obtain a wide band communication band by combining each narrow band, and a transmission unit that performs a transmission process for a signal to be transmitted via the plurality of narrow band antennas, A wireless communication device, comprising: a control unit that individually controls driving of the plurality of narrowband antennas so that a transmission signal does not exceed a wall when performing wireless communication. 19. The wireless communication device according to claim 18, wherein the control unit controls not to use a narrow band antenna that surrounds a specific narrow band that crosses a predetermined wall. 20. A transmission output control method for use in a room partitioned by a wall to perform wireless communication using a wideband signal, each having a communication band narrower than a wideband communication band. And, a transmission step of driving one of a plurality of narrow band antennas to obtain a wide band communication band by combining the respective narrow bands and performing a wireless signal transmission process; Receiving for receiving a radio signal by driving one of a plurality of narrow band antennas, each of which has a narrow range communication band and is configured to obtain a wide band communication band by combining the narrow bands. And a control step of individually controlling the driving of the plurality of narrow band antennas so that a wireless signal transmitted during wireless communication does not exceed a wall. Transmission output control method according to claim. 21. The transmission output control method according to claim 20, wherein in the control step, control is performed so that a narrow band antenna surrounding a specific narrow band that crosses a predetermined wall is not used. 22. A wireless communication system for performing wireless communication by a plurality of wireless terminals in a room partitioned by a wall using a broadband signal, each wireless terminal having a range narrower than a broadband communication band. Each wireless terminal that has a plurality of narrow-band antennas that have a communication band of 1 and a narrow-band antenna that obtains a wide-band communication band by combining the narrow bands, and that transmits a wireless signal is specified by the wireless terminal that exceeds the wall. Of the plurality of narrowband antennas are individually controlled so as not to use the frequencies of the above, and the wireless signals are transmitted to other wireless terminals, and the other wireless terminals do not use the specific frequencies. Controlling the drive of the narrow band antenna of. 23. A wireless communication device for performing wireless communication using a wideband signal, comprising: a pulse width control unit for controlling a pulse width of a transmission signal; and a radio frequency band corresponding to the controlled pulse width. A wireless transmission unit that performs a transmission process of a signal, and a filter control unit that controls a frequency band received by the wireless reception unit, and the pulse width control unit of the transmission signal so that the transmission signal has a desired frequency band. A wireless communication device, which controls a pulse width. 24. The method as set forth in claim 23, wherein the pulse width control unit is used in a room partitioned by a wall, and the pulse width control unit controls the pulse width to a frequency band in which the transmission signal does not exceed the wall. The wireless communication device described. 25. The filter control unit controls to receive a frequency band corresponding to the pulse width controlled by the pulse width control unit.
The wireless communication device according to. 26. A wireless communication method for performing wireless communication using a wideband signal, comprising a pulse width control step of controlling a pulse width of a transmission signal, and a wireless communication in a frequency band corresponding to the controlled pulse width. A wireless transmission step of transmitting a signal, a wireless reception step of receiving a wireless signal in a predetermined frequency band, and a filter control step of controlling a frequency band received by the wireless reception unit, wherein the pulse width control step Then, a pulse width of the transmission signal is controlled so that the transmission signal has a desired frequency band. 27. When a wireless communication environment is constructed in a room partitioned by a wall, the pulse width control step controls the pulse width to a frequency band in which a transmission signal does not exceed the wall. The wireless communication method according to claim 26. 28. The wireless communication method according to claim 26, wherein the filter control step controls to receive a frequency band corresponding to the pulse width controlled by the pulse width control step. 29. A radio communication system for performing radio communication by a plurality of radio terminals in a room partitioned by a wall using a broadband signal, each radio terminal having a frequency band corresponding to a predetermined pulse width. A wireless terminal that transmits and receives a wireless signal and sends a wireless signal controls the pulse width of the transmitted signal so that the transmitted signal does not use a specific frequency band that exceeds the wall, and sends the wireless signal to another wireless terminal. A wireless communication system, wherein another wireless terminal receives a frequency band corresponding to a pulse width that does not use the specific frequency. 30. Computer software readable in computer readable form for use in a walled room to describe a process on a computer system for performing wireless communication using a broadband signal. Storage medium, the computer software having a communication band narrower than a wide band communication band, and obtaining a wide band communication band by combining the respective narrow bands. A step of driving one of a plurality of narrow band antennas to perform a wireless signal transmission process, and a communication band having a range narrower than a wide band communication band, and matching each narrow band A reception switch that drives one of a plurality of narrowband antennas to obtain a wideband communication band by a radio signal reception process. In order to perform wireless communication, the drive of multiple narrow band antennas is individually controlled so that the wireless signal to be transmitted does not use a narrow band antenna that surrounds a specific narrow band that crosses a predetermined wall. And a control step for controlling the storage medium. 31. A storage medium that physically stores computer software in a computer-readable format, which is written so as to execute a process for performing wireless communication using a broadband signal on a computer system. The computer software has a pulse width control step of controlling the pulse width of the transmission signal, a radio transmission step of transmitting and processing a radio signal in a frequency band corresponding to the controlled pulse width, and a radio signal of a predetermined frequency band. A radio receiving step of receiving processing and a filter control step of controlling a frequency band received by the radio receiving unit are provided, and in the pulse width control step, a pulse width of the transmission signal is set so that the transmission signal has a desired frequency band. A storage medium characterized by being controlled. 32. A computer program described for performing on a computer system a process for performing wireless communication using a broadband signal in a room partitioned by a wall, the broadband program Transmitting a radio signal by driving one of a plurality of narrow band antennas, each having a communication band narrower than the communication band, and combining each narrow band to obtain a wide band communication band One of a plurality of narrow band antennas that has a transmission step for performing processing and a communication band that is narrower than the wide band communication band, and that obtains a wide band communication band by combining the narrow bands. And a specific narrow band in which the wireless signal transmitted during wireless communication crosses a predetermined wall. Computer program, characterized by comprising a control step of controlling individually the driving of said plurality of narrow band antennas to not use narrow band antenna surrounding. 33. A computer program written to execute a process for performing wireless communication using a wideband signal on a computer system, comprising a pulse width control step of controlling a pulse width of a transmission signal. A wireless transmission step of transmitting a wireless signal in a frequency band corresponding to the controlled pulse width, a wireless reception step of receiving a wireless signal in a predetermined frequency band, and a frequency band received by the wireless reception unit. And a filter control step for controlling, wherein the pulse width control step controls the pulse width of the transmission signal so that the transmission signal has a desired frequency band.