Abstract:
Communication units are each provided with a wireless communication control section, a timing pattern generating section for generating a specified timing pattern, an informing device control section for controlling an informing device in accordance with an arbitrary timing and a timing pattern analyzing section for analyzing the transmitted timing pattern. The communication unit generates a specified timing pattern in the timing pattern generating section, controls its own informing device in accordance with the timing pattern by the informing device control section and transmits the timing pattern from the wireless communication control section to the communication unit. The communication unit analyzes the timing pattern transmitted from the communication unit and controls its own informing device according to the analyzed timing pattern. This allows a person to reliably find his or her own unit to be searched even when a plural number of persons search different devices in an identical place.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a communication unit position detecting system for detecting the position of a wireless communication unit to be searched in a wireless network system employing a non-directional communication medium such as an electric wave and to a recording medium that stores a communication unit position detecting program. 
     Conventionally, there have been proposed various devices for searching a unit of a remote controller or the like of which the location is not found in a wireless communication system. 
     For example, the prior art reference of Japanese Patent Laid-Open Publication No. HEI 10-257571 discloses a system that includes one of a vibrating means, a sound producing means such as a buzzer, a light emitting means such as a lamp on the unit side where the remote controller or the like is located and operates to transmit a specified signal of an electric wave from the equipment side by a wireless communication means, receive this signal by the wireless communication means on the device side and effect the operation of vibrating the vibration means, buzzing or lighting the lamp on the basis of this received signal, thereby informing the user of the location of the unit by the sense of touch, the sense of hearing and the sense of sight (this being referred to as a first prior art technique). 
     The prior art reference of Japanese Patent Laid-Open Publication No. HEI 10-79987 discloses a system that includes a sound producing means such as a buzzer on the unit side where a remote controller or the like is located and operates to select a specified signal among a plurality of types of signals by a wireless communication means from the equipment side, transmit the signal by an electric wave, receive this specified signal by the wireless communication means on the unit side and effect the operation of buzzing when the received specified signal coincides with a signal set in the self unit. This allows the user to be informed of the location of the remote controller to be searched even when there is a plurality of remote controllers (this being referred to as a second prior art technique). 
     However, the aforementioned first and second prior art techniques have the problem that, if a plural number of persons search different devices in an identical place in response to a plurality of units concurrently vibrating, producing sound or emitting light, then there is caused the confusion of the persons who cannot specify the devices to be searched. 
     SUMMARY OF THE INVENTION 
     The present invention has been made in order to solve the aforementioned problem and has the object of providing a communication unit position detecting system capable of reliably finding the unit to be searched by a plural number of persons who search the devices even when the persons search different devices in an identical place as well as a recording medium that stores a recorded communication unit position detecting program. 
     In order to achieve the object, there is provided a communication unit position detecting system having a plurality of communication units connected to one another by way of a wireless network, wherein 
     one communication unit comprises a wireless communication means for putting wireless communication into practice, a timing pattern generating means for generating a specified timing pattern and a control means for controlling an informing device in accordance with an arbitrary timing, another communication unit comprises a wireless communication means for putting wireless communication into practice, a timing pattern analyzing means for analyzing a transmitted specified timing pattern and a control means for controlling an informing device in accordance with the analyzed timing, 
     the one communication unit generates a specified timing pattern by the timing pattern generating means, controlling the informing device in accordance with the generated timing, transmitting the generated timing pattern to another communication unit by the wireless communication means, and another communication unit receives the timing pattern transmitted from the one communication unit by the wireless communication means and controlling the informing device in accordance with the timing pattern analyzed by the timing pattern analyzing means. 
     With this arrangement, by searching another communication unit that is operating in accordance with the same timing as the operation timing of the informing device of one communication unit, the location of the currently communicating opposite communication unit can be detected by the five senses of the human being. It is merely required to search the communication unit that is operating in accordance with the same timing as that of the self communication unit, and therefore, if a plural number of persons concurrently search different communication units in an identical place, then each person can reliably find the communication unit to be searched. 
     In an embodiment of the present invention, the informing device of the one communication unit is one of a light emitting device such as an LCD or a lamp, a vibrating device such as a vibrator and a sound producing device such as a buzzer, and the informing device of another communication unit is one of a light emitting device such as an LCD or a lamp, a vibrating device such as a vibrator and a sound producing device such as a buzzer. 
     This allows the location of the currently communicating opposite communication unit to be detected by one of the sense of touch, the sense of hearing and the sense of sight of the human being. 
     In an embodiment of the present invention, the light emitting device is comprised of a device that can emit a plurality of colors and the control means executes switching control of the color of light to be emitted according to the generated timing pattern. 
     This allows the location of the currently communicating opposite communication unit to be detected by the sense of sight of the human being. 
     In an embodiment of the present invention, the communication unit has a plurality of informing devices and is provided with a selection means for arbitrarily selecting the informing device to be used. 
     Also, there is provided a communication unit position detecting system having a plurality of communication units connected to one another by way of a wireless network, wherein 
     one communication unit comprises a fragrance generating means for generating a specified fragrance and a transmission means for transmitting information of the type of the generated fragrance, and another communication unit comprises a reception means for receiving information of the type of the transmitted fragrance and a display means for displaying information of the type of the received fragrance. 
     This allows the location of the currently communicating opposite communication unit to be detected by the sense of smell of the human being. 
     Also, there is provided a communication unit position detecting system having a plurality of communication units connected to one another by way of a wireless network, wherein 
     one communication unit comprises a wind generating means for generating a flow of air and a transmission means for transmitting wind information representing the occurrence of the flow of air, and another communication unit comprises a reception means for receiving the transmitted wind information and a display means for displaying the received wind information. 
     This allows the location of the currently communicating opposite communication unit to be detected by the sense of touch of the human being. 
     In an embodiment of the present invention, the one communication unit is provided with a wind generating source direction detecting means for detecting the direction of the wind generating source generated by the one communication unit. 
     This allows the location of the currently communicating opposite communication unit to be automatically detected. 
     Also, there is provided a communication unit position detecting system having a plurality of communication units connected to one another by way of a wireless network, wherein 
     one communication unit comprises a heat generating means for generating heat and a transmission means for transmitting heat information representing the occurrence of heat, and another communication unit comprises a reception means for receiving the transmitted heat information and a display means for displaying the received heat information. 
     This allows the location of the currently communicating opposite communication unit to be detected by the effective temperature of the human being. 
     In an embodiment of the present invention, another communication unit is provided with a heat source direction detecting means for detecting the direction of the source of heat generated by the one communication unit. 
     This allows the location of the currently communicating opposite communication unit to be automatically detected. 
     Also, there is provided a communication unit position detecting system having a plurality of communication units connected to one another by way of a wireless network, wherein 
     one communication unit comprises a timing pattern generating means for generating a specified timing pattern, a first wireless communication means for transmitting the generated timing pattern by a non-directional communication means and a second wireless communication means for transmitting the generated timing pattern by a directional communication means, and another communication unit comprises a first wireless communication means for receiving a non-directional electric wave, a second wireless communication means for receiving a directional electric wave and a pattern detecting means for comparing the timing patterns of the two types of electric waves received by the wireless communication means and outputting a coincidence signal when both the patterns coincide with each other. 
     This allows the location of the currently communicating opposite communication unit to be automatically detected. 
     Also, there is provided a recording medium in which a communication unit position detecting program to be executed by a computer is recorded, wherein the program comprises: 
     a process for generating a specified timing pattern by a timing pattern generating means, 
     a process for controlling an informing device in accordance with the generated timing pattern, 
     a process for transmitting the generated timing pattern by a wireless communication means, and 
     a process for receiving the transmitted timing pattern by the wireless communication means and controlling the informing device in accordance with a timing pattern analyzed by a timing pattern analyzing means. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein: 
     FIG. 1 is a block diagram showing the first embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 2 is an explanatory view showing an example of physical address information stored in an address storage section and examples of timing patterns generated in a timing pattern generating section; 
     FIGS. 3A through 3F are explanatory views showing examples of various information tables owned by a wireless communication unit; 
     FIGS. 4A through 4C are explanatory views showing examples of timings for controlling the informing device of a wireless communication unit; 
     FIGS. 5A through 5C are charts of communication frame formats; 
     FIG. 6 is a chart of the operation sequence of a wireless communication unit that executes searching; 
     FIG. 7 is a chart of the operation sequence of a wireless communication unit to be searched; 
     FIG. 8 is a block diagram showing the second embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 9 is a block diagram showing the third embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 10 is a block diagram showing the fourth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 11 is a block diagram showing the fifth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIGS. 12A through 12C are schematic charts of frames for use in transmitting a timing pattern of positional detection; 
     FIG. 13 is a chart of the operation sequence of a wireless communication unit that executes searching; 
     FIG. 14 is a chart of the operation sequence of a wireless communication unit to be searched; 
     FIG. 15 is a block diagram showing the sixth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 16 is a chart of the operation sequence of a wireless communication unit that executes searching; 
     FIG. 17 is a block diagram showing the seventh embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIGS. 18A through 18C are schematic charts of frames for use in transmitting a timing pattern of positional detection; 
     FIG. 19 is a chart of the operation sequence of a wireless communication unit to be searched; 
     FIG. 20 is a block diagram showing the eighth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 21 is a chart of the operation sequence of a wireless communication unit that executes searching; 
     FIG. 22 is a block diagram showing the ninth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; 
     FIG. 23 is a block diagram showing the tenth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice; and 
     FIG. 24 is a chart of the operation sequence of a wireless communication unit that executes searching. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will be described below with reference to the accompanying drawings. 
     First Embodiment 
     FIG. 1 is a block diagram showing the first embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 1. 
     In the figure are shown wireless communication units A 1 , A 2 , . . . , An. The wireless communication units A 1 , A 2 , . . . , An have an identical construction except that is specific physical address information is individually assigned to each device. Therefore, the wireless communication unit A 1  will be concretely described hereinbelow. 
     That is, the wireless communication unit A 1  has an address storage section  18  for storing the physical address information specifically assigned to each device, a timing pattern generating section  11  for generating a specific timing pattern from the address information, a timing pattern analyzing section  12  for analyzing and processing the timing pattern generated in its own timing pattern generating section  11  or the timing patterns received from the other wireless communication units A 2 , . . . , An, an informing device control section  13  for operating an informing device in accordance with the timing analyzed by the timing pattern analyzing section  12 , a wireless communication control section  14  for executing control of transmission and reception of various frames, a transmission buffer  15  for storing the frame to be transmitted to the other wireless communication units, a reception buffer  16  for storing the frames transmitted from the other communication units and a timer  17  for measuring the time of repeat of the pattern included in the frame to be transmitted and received. 
     The address storage section  18  stores a 6-byte specific physical address information referred to as a call sign in the present first embodiment. The timing pattern generating section  11  takes out the address information stored in this address storage section  18  and processes the information to generate a timing pattern specific to each terminal. 
     FIG. 2 shows an example of the physical address information stored in the address storage section  18  and examples of the timing patterns generated in the timing pattern generating section  11 . 
     According to the examples, a timing pattern  11   a  of 1-bit representation, a timing pattern  11   b  of 2-bit representation and a timing pattern  11   c  of 4-bit representation are generated from a physical address information  18   a  of “08 00 1F 01 02 03”. 
     FIGS. 3A through 3F show examples of various switch information tables that control the informing device in the informing device control section  13  and includes a switch information table shown in FIG. 3A, a 4-color display information table shown in FIG. 3B described hereinbelow, a 16-color display information table shown in FIG. 3C described hereinbelow, a fragrance information table shown in FIG. 3D described hereinbelow, a wind force information table shown in FIG. 3E described hereinbelow and a temperature information table shown in FIG. 3F described hereinbelow. 
     The switch information table shown in FIG. 3A is to turn on and off the switch of a buzzer, an LCD, a lamp, a vibrator or the like according to the pattern of “0” and “1”. For example, in the case of the timing pattern  11   a  of 1-bit representation shown in FIG. 2, the switching control shown in FIG. 4A is executed. 
     In the 4-color display information table, the data of four colors (black, red, blue, green) are set in the color setting register of the device. Therefore, in the case of the timing pattern  11   b  of 2-bit representation shown in FIG. 2, the colors are set according to the sequence shown in FIG.  4 B. 
     In the 16-color display information table, the data of 16 colors (black, red, blue, yellow, . . . , green, . . . , white) are set in the color setting register of the device. Therefore, in the case of the timing pattern  11   c  of 4-bit representation shown in FIG. 2, the colors are set according to the sequence shown in FIG.  4 C. 
     Although the informing device is different, the device control can be similarly executed in the case of the tables of FIGS. 3D through 3F. 
     FIGS. 5A through 5C are schematic charts of frames for use in transmitting a positional detection timing pattern. That is, when issuing a positional detection request at the start of positional detection, a search request command frame F 1  having the format shown in FIG. 5A is used. At an informing device operation start time for positional detection, a search start command frame F 2  having the format shown in FIG. 5B is used. At an informing device operation end time, a search end command frame F 3  having the format shown in FIG. 5C is used. 
     Next, a procedure for executing positional detection in the wireless communication units A 1 , A 2 , An having the aforementioned construction will be described with reference to the operation sequence charts shown in FIG.  6  and FIG.  7 . It is to be noted that FIG. 6 is the operation sequence chart of the wireless communication unit that executes searching (another communication unit disclosed in the claims) and FIG. 7 is the operation sequence chart of the wireless communication unit to be searched (the one communication unit disclosed in the claims). The following description is based on the assumption that the wireless communication unit that executes searching (referred to as a self side wireless communication unit hereinafter) is defined as A 1  and the wireless communication unit to be searched (referred to as the opposite side wireless communication unit hereinafter) is defined as A 2 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 2  are denoted by the same reference numerals as those of the components constituting the self side wireless communication unit A 1 . 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 1  and the opposite side wireless communication unit A 2  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 2  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 2 , the self side wireless communication unit A 1  first confirms whether or not search is started (step S 1 ). If the search is not started, then the unit A 1  transmits the search request command frame F 1  to the opposite side wireless communication unit A 2  by the wireless communication control section  14  (step S 10 ). 
     When receiving the search request command frame F 1  (see FIG.  5 A and so forth hereinafter) (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit A 2  reads the physical address information  18   a  (see FIG.  2  and so forth hereinafter) from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 2  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit A 2  forms the search start command frame F 2  (see FIG. SB and so forth hereinafter) from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit A 2  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 1  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit A 2  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and controls the switch of the informing device according to the analyzed timing pattern (see FIG. 4A) (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 2 ), the self side wireless communication unit A 1  stores the received search start command frame F 2  into the reception buffer  16  (step S 3 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 5 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 4 ), then the unit A 1  starts to search the opposite side wireless communication unit A 2  (step S 6 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 7 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 11  via step S 1  and step S 2 ), the unit A 1  analyzes the received timing pattern by means of the switch information table shown in FIG. 3A (step S 12 ) and controls the switch of the informing device according to the timing pattern (see FIG. 4A) in the informing device control section  13  (step S 13 ). 
     By thus operating the informing device of the self side wireless communication unit A 1  and the informing device of the opposite side wireless communication unit A 2  in accordance with same timing, the user can easily search the location of the opposite side wireless communication unit A 2  by the five senses. 
     Second Embodiment 
     FIG. 8 is a block diagram showing the second embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 2. 
     In the figure are shown wireless communication units A 11 , A 21 , . . . , An 1 . There are shown a timing pattern generating section  11 , a timing pattern analyzing section  12 , a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , a timer  17  and an address storage section  18 . These components have constructions similar to those of the components shown in FIG. 1, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  131  denotes a light emitting device control section that executes flashing control of the switch of the light emitting device such as an LCD or a lamp in accordance with the timing analyzed by the timing pattern analyzing section  12  and serves as a concrete example of the informing device control section shown in FIG.  1 . 
     A procedure for executing positional detection with the wireless communication units A 11 , A 21 , . . . , An 1  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  6  and FIG.  7 . It is to be noted that FIG. 6 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 7 is the operation sequence chart of the wireless communication unit to be searched. FIG.  6  and FIG. 7 are used in the first embodiment. However, the sequence itself is similar in the present second embodiment, and therefore, the operations of the self side wireless communication unit and the opposite side wireless communication unit will be described with reference to FIG.  6  and FIG.  7 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 11  and the opposite side wireless communication unit to be searched is defined as A 21 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 21  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 11 . The frame to be transmitted uses the frame format shown in FIGS. 5A through 5C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 11  and the opposite side wireless communication unit A 21  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 21  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 21 , the self side wireless communication unit A 11  first confirms whether or not search is started (step S 1 ). If the search is not started, then the unit A 11  transmits the search request command frame F 1  to the opposite side wireless communication unit A 21  by the wireless communication control section  14  (step S 10 ). 
     When receiving the search request command frame F 1  (see FIG.  5 A and so forth hereinafter) (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit A 21  reads the physical address information  18   a  (see FIG.  2  and so forth hereinafter) from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 21  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit A 21  forms the search start command frame F 2  (see FIG.  5 B and so forth hereinafter) from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit A 21  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 11  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit A 21  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and controls the switch of the light emitting device such as an LCD or a lamp according to the analyzed timing pattern (see FIG. 4A) by means of the light emitting device control section  131  so as to flash the device (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 2 ), the self side wireless communication unit A 11  stores the received search start command frame F 2  into the reception buffer  16  (step S 3 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 5 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 4 ), then the unit A 11  starts to search the opposite side wireless communication unit A 21  (step S 6 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 7 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 11  via step S 1  and step S 2 ), the unit A 11  analyzes the received timing pattern by means of the switch information table shown in FIG. 3A (step S 12 ) and controls the switch of the light emitting device such as an LCD or a lamp according to the timing pattern (see FIG. 4A) by means of the light emitting device control section  131  so as to flash the device (step S 13 ). 
     By thus flashing the light emitting device of the self side wireless communication unit A 11  and the light emitting device of the opposite side wireless communication unit A 21  in accordance with same timing, the user can easily search the location of the opposite side wireless communication unit A 21  by the sense of sight. 
     In this case, by using the light emitting device that can emit light of a plurality of colors for the light emitting device control section  131  shown in FIG. 8, it is enabled to execute searching by a change in color corresponding to the claim  3 . For example, if a device capable of emitting light of four colors is used, by generating the timing pattern  11   b  of 2-bit representation shown in FIG. 2, analyzing the pattern by means of the 4-color display information table (see FIG. 3B) and controlling switchover between the colors of the light emitting device in accordance with the timing shown in FIG. 4B, then the color of the light emitting device such as an LCD or a lamp can be changed in accordance with same timing in the opposite side wireless communication unit A 21  and the self side wireless communication unit A 11  in communication. By this operation, the location of the wireless communication unit that is desired to be searched by the user can be correctly searched even when a plurality of wireless communication units exist. If a light emitting device capable of emitting light of 16 colors, by generating the timing pattern  11   b  of 4-bit representation shown in FIG. 2, analyzing the pattern by means of the 16-color display information table (see FIG. 3C) and controlling switchover between the colors of the light emitting device in accordance with the timing shown in FIG. 4C, then the color of the light emitting device such as an LCD or a lamp can be changed in accordance with same timing in the opposite side wireless communication unit A 21  and the self side wireless communication unit A 11  in communication. 
     Third Embodiment 
     FIG. 9 is a block diagram showing the third embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 2. 
     In the figure are shown a timing pattern generating section  11 , a timing pattern analyzing section  12 , a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , a timer  17  and an address storage section  18 . These components have constructions similar to those of the components shown in FIG. 1, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  132  denotes a vibrating device control section that executes switching control of the vibrating device such as a vibrator in accordance with the timing analyzed by the timing pattern analyzing section  12  and serves as a concrete example of the informing device control section shown in FIG.  1 . 
     A procedure for executing positional detection with the wireless communication units A 12 , A 22 , . . . , An 2  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  6  and FIG.  7 . FIG.  6  and FIG. 7 are used in the first embodiment. However, the sequence itself is similar in the present third embodiment, and therefore, the operations of the self side wireless communication unit and the opposite side wireless communication unit will be described with reference to FIG.  6  and FIG.  7 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 12  and the opposite side wireless communication unit to be searched is defined as A 22 . It is assumed that only the self side wireless communication unit A 12  has the vibrating device control section  132  and the opposite side wireless communication unit A 22  has the light emitting device control section  131  shown in FIG.  8 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 22  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 12 . The frame to be transmitted uses the frame format shown in FIGS. 5A through 5C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 12  and the opposite side wireless communication unit A 22  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 22  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 22 , the self side wireless communication unit A 12  first confirms whether or not search is started (step S 1 ). If the search is not started, then the unit A 12  transmits the search request command frame F 1  to the opposite side wireless communication unit A 22  by the wireless communication control section  14  (step S 10 ). 
     When receiving the search request command frame F 1  (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit A 22  reads the physical address information  18   a  from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 22  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit A 22  forms the search start command frame F 2  from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit A 22  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 12  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit A 22  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and controls the switch of the light emitting device such as an LCD or a lamp according to the analyzed timing pattern (see FIG. 4A) by means of the light emitting device control section  131  so as to flash the device (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 2 ), the self side wireless communication unit A 12  stores the received search start command frame F 2  into the reception buffer  16  (step S 3 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 5 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 4 ), then the unit A 12  starts to search the opposite side wireless communication unit A 22  (step S 6 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 7 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 11  via step S 1  and step S 2 ), the unit A 12  analyzes the received timing pattern by means of the switch information table shown in FIG. 3A (step S 12 ) and controls the switch of the vibrating device such as a vibrator according to the timing pattern (see FIG. 4A) by the vibrating device control section  132  so as to execute vibrating (step S 13 ). 
     By thus vibrating the vibrating device of the self side wireless communication unit A 12  and flashing the light emitting device of the opposite side wireless communication unit A 22  in accordance with same timing, the user can easily search the location of the opposite side wireless communication unit A 22  by the sense of sight and the sense of touch. 
     Fourth Embodiment 
     FIG. 10 is a block diagram showing the fourth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 2. 
     In the figure are shown a timing pattern generating section  11 , a timing pattern analyzing section  12 , a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , a timer  17  and an address storage section  18 . These components have constructions similar to those of the components shown in FIG. 1, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  133  denotes a sound producing device control section that executes switching control of the sound producing device such as a buzzer in accordance with the timing analyzed by the timing pattern analyzing section  12  and serves as a concrete example of the informing device control section shown in FIG.  1 . 
     A procedure for executing positional detection with the wireless communication units A 13 , A 23 , . . . , An 3  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  6  and FIG.  7 . FIG.  6  and FIG. 7 are used in the first embodiment. However, the sequence itself is similar in the present fourth embodiment, and therefore, the operations of the self side wireless communication unit and the opposite side wireless communication unit will be described with reference to FIG.  6  and FIG.  7 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 13  and the opposite side wireless communication unit to be searched is defined as A 23 . It is assumed that both the self side wireless communication unit A 13  and the opposite side wireless communication unit A 23  have the sound producing device control section  133 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 23  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 13 . The frame to be transmitted uses the frame format shown in FIGS. 5A through 5C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 13  and the opposite side wireless communication unit A 23  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication is unit A 23  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 23 , the self side wireless communication unit A 13  first confirms whether or not search is started (step S 1 ). If the search is not started, then the unit A 13  transmits the search request command frame F 1  to the opposite side wireless communication unit A 23  by the wireless communication control section  14  (step S 10 ). 
     When receiving the search request command frame F 1  (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit A 23  reads the physical address information  18   a  from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 23  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit A 23  forms the search start command frame F 2  from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit A 23  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 13  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit A 23  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and controls the switch of the sound producing device such as a buzzer according to the timing pattern (see FIG. 4A) by the sound producing device control section  133  (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 2 ), the self side wireless communication unit A 13  stores the received search start command frame F 2  into the reception buffer  16  (step S 3 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 5 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 4 ), then the unit A 13  starts to search the opposite side wireless communication unit A 23  (step S 6 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 7 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 11  via step S 1  and step S 2 ), the unit A 13  analyzes the received timing pattern by means of the switch information table shown in FIG. 3A (step S 12 ) and controls the switch of the sound producing device such as a buzzer according to the timing pattern (see FIG. 4A) by the sound producing device control section  133  (step S 13 ). 
     By thus turning on and off the sound producing device of the self side wireless communication unit A 13  and the sound producing device of the opposite side wireless communication unit A 23  in accordance with same timing, the user can easily search the location of the opposite side wireless communication unit A 23  by the sense of hearing. 
     Besides the aforementioned second through fourth embodiments, the user can easily search the locations of the opposite side wireless communication units A 21  through A 23  through the sense of sight and the sense of hearing by using a light emitting device for the opposite side wireless communication units A 21  through A 23 , using a sound producing device for the self side wireless communication units A 11  through A 13  and flashing the light emitting devices such as lamps of the opposite side wireless communication units A 21  through A 23  in accordance with the same timing as the sound producing of the sound producing devices such as buzzers of the self side wireless communication units A 11  through A 13  in communication. The user can easily search the locations of the opposite side wireless communication units A 21  through A 23  through the sense of sight and the sense of hearing by using a sound producing device for the opposite side wireless communication units A 21  through A 23 , using a light emitting device for the self side wireless communication units A 11  through A 13  and making the sound producing device such as buzzers of the opposite side wireless communication units A 21  through A 23  produce sound in accordance with the same timing as the light emission of the light emitting device such as lamps of the self side wireless communication units A 11  through A 13  in communication. The user can easily search the locations of the opposite side wireless communication units A 21  through A 23  through the sense of sight and the sense of touch by using a sound producing device for the opposite side wireless communication units A 21  through A 23 , using a vibrating device for the self side wireless communication units A 11  through A 13  and making the sound producing device such as buzzers of the opposite side wireless communication units A 21  through A 23  produce sound in accordance with the same timing as the vibration of the vibrating device such as vibrators of the self side wireless communication units All through A 13  in communication. That is, the informing devices of the self side wireless communication units A 11  through A 13  and the informing devices of the opposite side wireless communication units A 21  through A 23  can be provided by an arbitrary combination of the light emitting device, the vibrating device and the sound producing device. 
     Fifth Embodiment 
     FIG. 11 is a block diagram showing the fifth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 4. 
     In the figure are shown a timing pattern generating section  11 , a timing pattern analyzing section  12 , a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , a timer  17  and an address storage section  18 . These components have constructions similar to those of the components shown in FIG. 1, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  134  denotes a device selecting control section that select one of a light emitting device D 1 , a sound producing device D 2  and a vibrating device D 3 , executes switching control of the selected device in accordance with the timing analyzed by the timing pattern analyzing section  12  and serves as a concrete example of the informing device shown in FIG.  1 . The reference numeral  19  denotes a display section. 
     FIGS. 12A through 12C are schematic charts of frames for use in transmitting a timing pattern of positional detection. That is, when issuing a positional detection request at the start of positional detection, a search request command frame F 14  having the format shown in FIG. 12A is used. At an informing device operation start time for positional detection, a search start command frame F 24  having the format shown in FIG. 12B is used. At an informing device operation end time, a search end command frame F 34  having the format shown in FIG. 12C is used. A difference between the search request command frame F 14  shown in FIG.  12 A and the search request command frame F 1  shown in FIG. 5A is that device information (other unit device) to be used for the opposite side wireless communication unit and the device information (self unit device) to be used for the self side wireless communication unit are newly added for the search request command frame F 14 . Likewise, a difference between the search start command frame F 24  shown in FIG.  12 B and the search start command frame F 2  shown in FIG. 5B is that device information (other unit device) to be used for the opposite side wireless communication unit and the device information (self unit device) to be used for the self side wireless communication unit are newly added for the search start command frame F 24 . 
     Next, a procedure for executing positional detection in the wireless communication units A 14 , A 24 , An 4  having the aforementioned construction will be described with reference to the operation sequence charts shown in FIG.  13  and FIG.  14 . It is to be noted that FIG. 13 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 14 is the operation sequence chart of the wireless communication unit to be searched. The following description is based on the assumption that the wireless communication unit that executes searching is defined as A 14  and the wireless communication unit to be searched is defined as A 24 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 24  are denoted by the same reference numerals as those of the components constituting the self side wireless communication unit A 14 . 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 14  and the opposite side wireless communication unit A 24  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 24  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 24 , the self side wireless communication unit A 14  first confirms whether or not search is started (step S 41 ). If the search is not started, the informing device (one of D 1  through D 3 ) to be used by the unit A 14  and the informing device (one of D 1  through D 3 ) that is desired to be used by the opposite side wireless communication unit A 24  are set to the search request command frame F 14  by means of the wireless communication control section  14  (step S 42 ) and transmitted to the opposite side wireless communication unit A 24  (step S 43 ). 
     When receiving the search request command frame F 14  (when the affirmative decision of YES is made in step S 62 ), the opposite side wireless communication unit A 24  selects the informing device (one of D 1  through D 3 ) to be used according to the information of the “other unit device” included in the search request command frame F 14  (step S 63 ). Then, the unit A 24  reads the physical address information  18   a  from the address storage section  18  (step S 64 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 24  from the physical address information  18   a  in the timing pattern generating section  11  (step S 65 ). Then, the unit A 24  forms the search start command frame F 24  including the generated timing pattern  11   a  and the type of the informing device that is determined to be used and stores the same into the transmission buffer  15  (step S 66 ). Subsequently, the unit A 24  transmits the search start command frame F 24  stored in the transmission buffer  15  to the self side wireless communication unit A 14  by the wireless communication control section  14  and displays the information of the “self unit device” included in the previously received search request command frame F 14  by means of the display section  19  (step S 68 ). 
     Concurrently, the opposite side wireless communication unit A 24  confirms whether or not the time of repeat has elapsed (step S 69 ), reads the timing pattern  11   a  generated in the timing pattern generating section  11  when the time has not elapsed (step S 70 ), analyzes the read timing pattern  11   a  by means of the switch information table shown in FIG. 3A by the timing pattern analyzing section  12  (step S 71 ) and controls the switch of the informing device (one of D 1  through D 3 ) that is determined to be used by the device selecting control section  134  according to the analyzed timing pattern (see FIG. 4A) (step S 72 ). 
     When receiving the search start command frame F 24  (when the affirmative decision of YES is made in step S 44 ), the self side wireless communication unit A 14  stores the received search start command frame F 24  into the reception buffer  16  (step S 45 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 24  (when the affirmative decision of YES is made in step S 47 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 46 ), then the unit A 14  starts to search the opposite side wireless communication unit A 24  (step S 48 ), sets the data of the time of repeat included in the search start command frame F 24  in the internal timer  17  (step S 49 ) and displays on the display section  19  the type of the device that is determined to be used for the opposite side wireless communication unit A 24  according to the information of the “self unit device” included in the search start command frame F 24  (step S 50 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 53  via step S 41  and step S 44 ), the unit A 14  analyzes the received timing pattern by means of the switch information table shown in FIG. 3A (step S 54 ) and controls the switch of the informing device to be used for the self side wireless communication unit A 14  previously determined in step S 42  by the device selecting control section  134  according to the timing pattern (see FIG. 4A) (step S 55 ). 
     By thus subjecting the informing device of the self side wireless communication unit A 14  and the informing device of the opposite side wireless communication unit A 22  to switching control in accordance with same timing, the user can easily search the location of the opposite side wireless communication unit A 24  by the sense of sight, sense of hearing and sense of touch. 
     Sixth Embodiment 
     FIG. 15 is a block diagram showing the sixth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim 4. 
     In the figure are shown wireless communication units A 15 , A 25 , . . . , An 5 . There are shown a timing pattern generating section  11 , a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , a timer  17 , an address storage section  18  and a display section  19 . These components have constructions similar to those of the components shown in FIG. 11, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  135  denotes an image input section that employs a device of a camera or the like and serves as a concrete example of the informing device control section shown in FIG.  1 . The reference numeral  125  denotes a timing pattern comparing and analyzing section that compares the timing pattern obtained by the image input section  135  with the timing pattern received from the opposite side wireless communication unit. 
     A procedure for executing positional detection with the wireless communication units A 15 , A 25 , . . . , An 5  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  16  and FIG.  7 . It is to be noted that FIG. 16 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 7 is the operation sequence chart of the wireless communication unit to be searched. FIG. 7 is used in the first embodiment. However, the sequence itself is similar in the present sixth embodiment, and therefore, the operations of the opposite side wireless communication unit will be described with reference to FIG.  7 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 15  and the opposite side wireless communication unit to be searched is defined as A 25 . It is assumed that only the self side wireless communication unit A 15  has the image input section  135  and the opposite side wireless communication unit A 25  has the light emitting device control section  131  shown in FIG.  8 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 25  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 15 . The frame to be transmitted uses the frame format shown in FIGS. 5A through 5C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 15  and the opposite side wireless communication unit A 25  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 25  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 25 , the self side wireless communication unit A 15  first confirms whether or not search is started (step S 81 ). If the search is not started, then the unit A 15  transmits the search request command frame F 1  to the opposite side wireless communication unit A 25  by the wireless communication control section  14  (step S 90 ). 
     When receiving the search request command frame F 1  (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit A 25  reads the physical address information  18   a  from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit A 25  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit A 25  forms the search start command frame F 2  from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit A 25  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 15  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit A 25  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and controls the switch of the light emitting device such as an LCD or a lamp according to the analyzed timing pattern (see FIG. 4A) by means of the light emitting device control section  131  so as to flash the device (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 82 ), the self side wireless communication unit A 15  stores the received search start command frame F 2  into the reception buffer  16  (step S 83 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 85 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 84 ), then the unit A 15  starts to search the opposite side wireless communication unit A 25  (step S 86 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 87 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 91  via step S 81  and step S 82 ), the unit A 15  analyzes the received timing pattern and the timing pattern obtained from the image input section  135  by means of the switch information table shown in FIG. 3A (step S 92 ) and informs the user of the event that the opposite side wireless communication unit A 25  is found when the patterns coincide with each other (when the affirmative decision of YES is made in step S 93 ) by displaying the event on the display section  19  (step S 94 ). 
     By thus detecting the flashing pattern of the light emitting device of the lamp or the like of the opposite side wireless communication unit A 25  by means of the image input section  135  of a camera or the like on the self side and executing informing, the location of the opposite side wireless communication unit A 25  can be automatically searched. 
     Seventh Embodiment 
     FIG. 17 is a block diagram showing the seventh embodiment of a wireless communication unit for putting the wireless communication unit position detecting system of the present invention into practice, corresponding to the claim 5. 
     In the figure are shown wireless communication units A 16 , A 26 , . . . , An 6 . There are shown a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16 , an address storage section  18  and a display section  19 . These components have constructions similar to those of the components shown in FIG. 11, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  136  denotes a fragrance generating section that generates a fragrance of a specified type and serves as a concrete example of the informing device control section shown in FIG.  1 . The display section  19  displays the type of the fragrance generated by the opposite side wireless communication unit. 
     FIGS. 18A through 18C are schematic charts of frames for use in transmitting a timing pattern of positional detection. That is, when issuing a positional detection request at the start of positional detection, a search request command frame F 16  having the format shown in FIG. 18A is used. At an informing device operation start time for positional detection, a search start command frame F 26  having the format shown in FIG. 18B is used. At an informing device operation end time, a search end command frame F 36  shown in FIG. 18C is used. A difference between the search request command frame F 16  shown in FIG.  18 A and the search request command frame F 1  shown in FIG. 5A is that a parameter representing the type of the fragrance that is desired to be generated is added for the search request command frame F 16 . Likewise, a difference between the search start command frame F 26  shown in FIG.  18 B and the search start command frame F 2  shown in FIG. 5B is that a parameter representing the type of the fragrance generated in the opposite side wireless communication unit is added for the search start command frame F 26 . It is to be noted that the fragrance information table for analyzing the type of the fragrance has already been shown in FIG.  3 D. 
     Next, a procedure for executing positional detection in the wireless communication units A 16 , A 26 , . . . , An 6  having the aforementioned construction will be described with reference to the operation sequence charts shown in FIG.  19 . It is to be noted that FIG. 19 is the operation sequence chart of the wireless communication unit to be searched. The following description is based on the assumption that the wireless communication unit that executes searching is defined as A 16  and the wireless communication unit to be searched is defined as A 26 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 26  are denoted by the same reference numerals as those of the components constituting the self side wireless communication unit A 16 . 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 16  and the opposite side wireless communication unit A 26  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 26  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 26 , the self side wireless communication unit A 16  first confirms whether or not search is started. If the search is not started, the unit A 16  transmits the search request command frame F 16  including the type of the fragrance that is desired to be generated to the opposite side wireless communication unit A 26  by the wireless communication control section  14 . 
     When receiving the search request command frame F 16  (when the affirmative decision of YES is made in step S 102 ), the opposite side wireless communication unit A 26  determines the type of the fragrance that can be generated according to the parameter information included in the search request command frame F 16  (step S 103 ), forms a search start command frame F 26  as a parameter in correspondence with the fragrance information table that shows the type of fragrance to be generated in FIG.  3 D and stores the same into the transmission buffer  15  (step S 104 ). Subsequently, the unit A 26  transmits the search start command frame F 26  stored in the transmission buffer  15  to the self side wireless communication unit A 16  by the wireless communication control section  14  (step S 105 ). Subsequently, the fragrance of the type determined by the fragrance generating section  136  is generated (step S 106 ). 
     The self side wireless communication unit A 16  stores the received search start command frame F 26  into the reception buffer  16  and analyzes the stored search start command. Upon recognizing the search start command frame F 26 , the unit A 16  analyzes the type of the fragrance of the parameter information included in the search start command frame F 26  by means of the fragrance information table shown in FIG.  3 D and informs the user of the result of analysis by displaying the same on the display section  19 . 
     By thus generating an arbitrary fragrance from the opposite side wireless communication unit A 26  and informing the self side wireless communication unit A 16  of the type of the generated fragrance, the user can search the location of the opposite side wireless communication unit A 26  by the sense of smell. 
     Eighth Embodiment 
     FIG. 20 is a block diagram showing the eighth embodiment of a wireless communication unit for putting the communication unit position detecting system of the present invention into practice, corresponding to the claim  6  and claim 7. 
     In the figure are shown wireless communication units A 17 , A 27 , . . . , An 7 . There are shown a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16  and a display section  19 . These components have constructions similar to those of the components shown in FIG. 11, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  137  denotes a wind generating section that generates wind of an arbitrary strength and direction and serves as a concrete example of the informing device control section shown in FIG.  1 . The reference numeral  207  denotes a wind direction detecting section (wind generating source direction detecting means) employing a device of an anemoscope or the like. 
     A procedure for executing positional detection with the wireless communication units A 17 , A 27 , . . . , An 7  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  21  and FIG.  19 . It is to be noted that FIG. 21 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 19 is the operation sequence chart of the wireless communication unit to be searched. FIG. 19 is used in the sixth embodiment. However, the sequence itself is similar in the present eighth embodiment, and therefore, the operations of the opposite side wireless communication unit will be described with reference to FIG.  19 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 17  and the opposite side wireless communication unit to be searched is defined as A 27 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 27  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 17 . The frame to be transmitted is similar to that shown in FIGS. 18A through 18C, and therefore, the description will be done with reference to the frame format shown in FIGS. 18A through 18C. 
     If the self side wireless communication unit A 17  and the opposite side wireless communication unit A 27  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 27  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 27 , the self side wireless communication unit A 17  first confirms whether or not search is started (step S 111 ). If the search is not started, the unit A 17  transmits a search request command frame F 16  including the setting value of the strength, direction and so on of wind that is desired to be generated in a parameter corresponding to the wind force information table shown in FIG. 3E to the opposite side wireless communication unit A 27  by the wireless communication control section  14 . 
     When receiving the search request command frame F 16  (when the affirmative decision of YES is made in step S 102 ), the opposite side wireless communication unit A 27  determines the strength, direction and so on of wind that can be generated by analyzing the parameter information included in the search request command frame F 16  by means of the wind force information table shown in FIG. 3E (step S 103 ), forms a search start command frame F 26  as a parameter obtained by making the strength, direction and so on of wind to be generated correspond to the wind force information table shown in FIG.  3 E and stores the same into the transmission buffer  15  (step S 104 ). Subsequently, the unit A 27  transmits the search start command frame F 26  stored in the transmission buffer  15  to the self side wireless communication unit A 17  by the wireless communication control section  14  (step S 105 ). Subsequently, the unit A 27  generates a wind of the strength, direction and so on determined by the wind generating section  137  (step S 106 ). 
     When receiving the search start command frame F 26  (when the affirmative decision of YES is made in step S 112 ), the self side wireless communication unit A 17  stores the received search start command frame F 26  into the reception buffer  16  (step S 113 ). Then, the unit A 17  analyzes the stored search start command frame (step S 114 ). Upon recognizing the search start command frame F 26 , the unit A 17  starts searching the opposite side wireless communication unit A 27  (step S 116 ), analyzes the information of the strength, direction and so on of wind of the parameter information included in the search start command frame F 26  by means of the wind force information table shown in FIG.  3 E and informs the user of the result of analysis by displaying the same on the screen of the display section  19  (step S 117 ). 
     Subsequently, the operation proceeds from step S 111  and step S 112  to step S 120  so as to make the unit A 17  compare the received information of the strength, direction and so on of wind generated from the opposite side wireless communication unit A 27  with the information obtained from the wind direction detecting section  207  of an anemoscope or the like and analyze the same. If coincidence occurs (when the affirmative decision of YES is made in step S 121 ), then the unit A 17  displays on the display section  19  the information representing the event that the opposite side wireless communication unit A 27  is found, informing the user of the event (step S 122 ). 
     By thus generating a wind of arbitrary strength and direction from the opposite side wireless communication unit A 27  and informing the self side wireless communication unit A 17  of the setting value, the user can search the location of the opposite side wireless communication unit A 27  by the sense of touch. Furthermore, by providing the self side wireless communication unit A 17  with the wind direction detecting section  207  of an anemoscope or the like, the opposite side wireless communication unit A 27  can be automatically searched. 
     Ninth Embodiment 
     FIG. 22 is a block diagram showing the ninth embodiment of a wireless communication unit for putting the wireless communication unit position detecting system of the present invention into practice, corresponding to the claim 8 and claim 9. 
     In the figure are shown wireless communication units A 18 , A 28 , . . . , An 8 . There are shown a wireless communication control section  14 , a transmission buffer  15 , a reception buffer  16  and a display section  19 . These components have constructions similar to those of the components shown in FIG. 11, and therefore, same reference numerals are given to these components with no detailed description provided for them. The reference numeral  138  denotes a heat generating section that generates heat of an arbitrary temperature and serves as a concrete example of the informing device control section shown in FIG.  1 . The reference numeral  208  denotes a heat source detecting section (heat source detection detecting means) that can detect the temperature. 
     A procedure for executing positional detection with the wireless communication units A 18 , A 28 , . . . , An 8  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  21  and FIG.  19 . It is to be noted that FIG. 21 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 19 is the operation sequence chart of the wireless communication unit to be searched. FIG.  21  and FIG. 19 are used in the eighth embodiment. However, the sequence itself is similar in the present ninth embodiment, and therefore, the operations of the self side wireless communication unit and the opposite side wireless communication unit will be described with reference to FIG.  21  and FIG.  19 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 18  and the opposite side wireless communication unit to be searched is defined as A 28 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit A 28  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 18 . The frame to be transmitted is similar to that shown in FIGS.  18 A through  18 C, and therefore, the description will be done with reference to the frame format shown in FIGS. 18A through 18C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 18  and the opposite side wireless communication unit A 28  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit A 28  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit A 28 , the self side wireless communication unit A 18  first confirms whether or not search is started (step S 111 ). If the search is not started, the unit A 18  transmits a search request command frame F 16  in which the temperature of heat that is desired to be generated is included in a parameter in correspondence with the temperature information table shown in FIG. 3F to the opposite side wireless communication unit A 28  by the wireless communication control section  14 . 
     When receiving the search request command frame F 16  (when the affirmative decision of YES is made in step S 102 ), the opposite side wireless communication unit A 28  determines the temperature of heat that can be generated by analyzing the parameter information included in the search request command frame F 16  by means of the temperature information table shown in FIG. 3F (step S 103 ), forms a search start command frame F 26  as a parameter obtained by making the determined heat temperature correspond to the temperature information table shown in FIG.  3 F and stores the same into the transmission buffer  15  (step S 104 ). Subsequently, the unit A 28  transmits the search start command frame F 26  stored in the transmission buffer  15  to the self side wireless communication unit A 18  by the wireless communication control section  14  (step S 105 ). Subsequently, the unit A 28  generates heat of the temperature determined by the heat generating section  138  (step S 106 ). 
     When receiving the search start command frame F 26  (when the affirmative decision of YES is made in step S 112 ), the self side wireless communication unit A 18  stores the received search start command frame F 26  into the reception buffer  16  (step S 113 ). Then, the unit A 18  analyzes the stored search start command (step S 114 ). Upon recognizing the search start command frame F 26 , the unit A 18  starts searching the opposite side wireless communication unit A 28  (step S 116 ), analyzes the parameter information included in the search start command frame F 26  by means of the temperature information table shown in FIG.  3 F and informs the user of the result of analysis by displaying the same on the screen of the display section  19  (step S 117 ). 
     Subsequently, the operation proceeds from step S 111  and step S 112  to step S 120  so as to make the unit A 18  compare the received information of the temperature of heat generated from the opposite side wireless communication unit A 28  with the information obtained from the heat source detecting section  208 . If coincidence occurs (when the affirmative decision of YES is made in step S 121 ), then the unit A 18  displays on the display section  19  information representing the event that the opposite side wireless communication unit A 28  is found, informing the user of the event (step S 122 ). 
     By thus generating heat of an arbitrary temperature from the opposite side wireless communication unit A 28  and informing the self side wireless communication unit A 18  of the setting value, the user can search the location of the opposite side wireless communication unit A 28  by the sense of touch. Furthermore, by providing the self side wireless communication unit A 18  with a heat detecting section  208 , the opposite side wireless communication unit A 28  can be automatically searched. 
     Tenth Embodiment 
     FIG. 23 is a block diagram showing the tenth embodiment of a wireless communication unit for putting the wireless communication unit position detecting system of the present invention into practice, corresponding to the claim 10. 
     In the figure are shown wireless communication units A 19 , A 29 , . . . , An 9 . There are shown a timing pattern generating section  11 , a wireless communication control section  14  (first wireless communication means), a transmission buffer  15 , a reception buffer  16 , a timer  17 , an address storage section  18  and a display section  19 . The reference numeral  125  denotes a timing pattern comparing and analyzing section. These components have constructions similar to those of the components shown in FIG. 15, and therefore, same reference numerals are given to the components with no detailed description provided for them. The reference numeral  149  denotes a non-directional wireless communication control section (second wireless communication means) employing a device of infrared ray IR, laser, ultrashort wave or the like. 
     A procedure for executing positional detection with the wireless communication units A 19 , A 29 , . . . , An 9  having the aforementioned construction will be described next with reference to the operation sequence charts shown in FIG.  24  and FIG.  7 . It is to be noted that FIG. 24 is the operation sequence chart of the wireless communication unit that executes searching and FIG. 7 is the operation sequence chart of the wireless communication unit to be searched. FIG. 7 is used in the first embodiment. However, the sequence itself is similar in the present tenth embodiment, and therefore, the operations of the opposite side wireless communication unit will be described with reference to FIG.  7 . The following description is based on the assumption that the self side wireless communication unit that executes searching is defined as A 19  and the opposite side wireless communication unit to be searched is defined as An 9 . It is to be noted that the reference numerals of the components constituting the opposite side wireless communication unit An 9  are denoted by the same reference numerals of the components constituting the self side wireless communication unit A 19 . The frame to be transmitted uses the frame format shown in FIGS. 5A through 5C. 
     If a non-directional wireless communication means such as an electric wave is used in a state in which the self side wireless communication unit A 19  and the opposite side wireless communication unit An 9  are communicating by means of the wireless communication control section  14 , then the location of the opposite side wireless communication unit An 9  cannot be recognized. 
     Accordingly, when searching the location of the opposite side wireless communication unit An 9 , the self side wireless communication unit A 19  first confirms whether or not search is started (step S 131 ). If the search is not started, then the unit A 19  transmits the search request command frame F 1  to the opposite side wireless communication unit An 9  by the wireless communication control section  14  (step S 140 ). 
     When receiving the search request command frame F 1  (when a affirmative decision of YES is made in step S 22 ), the opposite side wireless communication unit An 9  reads the physical address information  18   a  from the address storage section  18  (step S 23 ) and generates a timing pattern (for example, the timing pattern  11   a  shown in FIG. 2) specific to the opposite side wireless communication unit An 9  from the physical address information  18   a  in the timing pattern generating section  11  (step S 24 ). Then, the unit An 9  forms the search start command frame F 2  from the generated timing pattern  11   a  and stores the same into the transmission buffer  15  (step S 25 ). Subsequently, the unit An 9  transmits the search start command frame F 2  stored in the transmission buffer  15  to the self side wireless communication unit A 19  by the wireless communication control section  14  (step S 26 ). 
     Concurrently, the opposite side wireless communication unit An 9  confirms whether or not the time of repeat has elapsed (step S 27 ) and reads the timing pattern  11   a  in the timing pattern generating section  11  when the time has not elapsed (step S 28 ), analyzes the read timing pattern  11   a  in the timing pattern analyzing section  12  by means of the switch information table shown in FIG. 3A (step S 29 ) and executes transmission according to the analyzed timing pattern (see FIG. 4A) from the directional communication control section  149  (step S 30 ). 
     When receiving the search start command frame F 2  (when the affirmative decision of YES is made in step S 132 ), the self side wireless communication unit A 19  stores the received search start command frame F 2  into the reception buffer  16  (step S 133 ). If the timing pattern analyzing section  12  recognizes that the received command is the search start command frame F 2  (when the affirmative decision of YES is made in step S 135 ) as a result of analysis of the frame stored in the reception buffer  16  (step S 134 ), then the unit A 19  starts to search the opposite side wireless communication unit An 9  (step S 136 ) and sets the data of the time of repeat included in the search start command frame F 2  in the internal timer  17  (step S 137 ). Subsequently, until this time of repeat elapses (when the affirmative decision of YES is made in step S 141  via step S 131  and step S 132 ), the unit A 19  compares the timing pattern received by the non-directional wireless communication control section  149  with the timing pattern received by the directional wireless communication control section  149  for analysis (step S 142 ) and informs the user of the event that the opposite side wireless communication unit An 9  is found by displaying the event on the display section  19  when the pattern coincidence occurs (when the affirmative decision of YES is made in step S 143 ) (step S 144 ). 
     By thus comparing the timing pattern received by the non-directional wireless communication control section  14  with the timing pattern received by the directional wireless communication control section  149  in the self side wireless communication unit A 19 , the location of the opposite side wireless communication unit An 9  can be automatically searched. 
     In each of the communication units constituting the communication unit position detecting system described in connection with the first through tenth embodiments, the positional detection processing of each unit is put into practice by a program stored in the unit. This program is stored in a recording medium that can be read by a computer. In the present invention, this recording medium is not shown (not shown in the block diagrams of the wireless communication systems of FIGS. 1,  8 ,  9 ,  10 ,  11 ,  15 ,  17 ,  20 ,  22  and  23 ). However, it is acceptable to internally provide the wireless communication unit with a program medium reading device (not shown) and allow the program medium to be read by inserting a recording medium into the device. Otherwise, it is acceptable to store the program in a storage means (not shown) such as a program memory provided inside the wireless communication unit. The stored program may have a construction to be executed by making direct access to the program in either case. Otherwise, it is acceptable to execute the program by reading the program and downloading the read program into a main memory (not shown) in either case. It is to be noted that this program for downloading use is preparatorily stored in the main body of the unit. 
     In this case, the aforementioned program medium may be a recording medium that can be removed from the main body and is provided by any of the media that carry the program in a fixed form including tape-based media of a magnetic tape, a cassette tape and the like, disk-based media of magnetic disks of a floppy disk, a hard disk and the like and optical disks of CD-ROM, MO, MD, DVD and the like and semiconductor-memory-based media of mask ROM, EPROM, EEPROM, flash ROM and the like. 
     The present invention is provided with a means (a wireless communication function or a wired communication function by way of a public line of internet or the like (not shown)) capable of communicating with the external devices. Therefore, the medium may connect with the external devices by this means and carry a program in a fluidic manner by downloading the program. 
     When downloading the program from the communication network as described above, a program for downloading the aforementioned program may be preparatorily stored in the main body of the unit or installed from another recording medium. The contents stored in the recording medium is not limited to a program but allowed to be data. 
     The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.