JP4375035B2 - Wireless communication apparatus and program - Google Patents

Description

  The present invention particularly relates to a wireless communication apparatus and a program that configure a home network in a home.

  In recent years, white goods such as air conditioners and refrigerators, security devices such as intrusion sensors, and home controllers installed in the home are connected wirelessly and connected to the home controller via a server using a mobile phone from outside the house. However, home network systems have been developed that control white goods such as air conditioners, and notify home security devices of information about home security devices via mobile phones. In such a home network system, a plurality of channels are generally assigned to the same system in consideration of jamming. Some wireless communication devices and programs in this type of home network system are described below (see, for example, Patent Document 1).

  FIG. 9 shows a communication message format used in the conventional wireless communication apparatus described in Patent Document 1, and the header part (1) 101a, the header part (2) 101b, and the header part (3) 101c are repeatedly transmitted. It is configured. Each of the header parts (1) to (3) includes a first bit synchronization signal 102, a first frame synchronization signal 103, a first control code 104, and a first partial identification code 105. Then, after the repetition of the header portion 101, the second bit synchronization signal 107, the second frame synchronization signal 108, the second control code 109, the second partial identification code 110, and the data signal 111 are transmitted as the information portion 106. It is configured to be.

  FIG. 10 illustrates the operation when the wireless communication apparatus waiting for multi-channel reception receives the above-mentioned message structure signal. In FIG. 10, the sender A performs wireless transmission in order to communicate with a third party using one channel. Then, the sender B wirelessly transmits to the receiver C a signal having the message structure shown in FIG. The receiver C carries out carrier sense alternately on the 1st channel and the 2nd channel and confirms the presence or absence of the carrier.

  Then, as shown in FIG. 10 (3), for example, when the carrier of the transmission signal of the sender A is detected in one channel, the reception on is continued for a while in order to determine whether the transmission is to the own station. When the received first partial identification code 105 or second partial identification code 110 is compared with its own identification code and it is determined that it is not addressed to its own station, the reception is switched to channel 2 and the carrier is detected. Then, in channel 2, if it is determined that the address is for the own station by the first partial identification code 105 or the second partial identification code 110 in the header signal 101 included in the signal of the sender B, the reception is continued to the end.

In order to receive the header signal 101 and the information unit 106, it is necessary to generate a sampling clock with the first bit synchronization signal 102 and to synchronize the frame with the first frame synchronization signal 103. Then, the receiver C needs time to determine that it is not addressed to itself by receiving one channel, and it is uncertain at which timing it starts to receive one channel. Therefore, the header signal 101 is repeatedly transmitted n times.
JP 2000-270041 A

  However, in the conventional configuration, when the wireless message is transmitted from the sender B to the receiver C through the two channels, the receiver C receives the wireless message from the transmitter A through the one channel, and the wireless message addressed to its own device. Since it is considered that the received data is shifted to the second channel and received, the number of repeated transmissions of the header portion is set to n in consideration of such a bad condition. Therefore, even when there is no radio wave or jamming wave from the sender A, the number of repeated transmissions is always constant at a design value with a margin, that is, a number in consideration of bad conditions. Therefore, since the number of repeated transmissions of the header part is large, there is a problem that it takes a long communication time when the number of communication between the sender B and the receiver C increases.

  In order to solve this problem, if the number of channels waiting for reception is simply set to one channel, another problem arises that communication cannot be performed when interference occurs in the one channel.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a wireless communication apparatus and program capable of shortening the communication time by varying the number of repeated transmissions of the header portion according to the situation. And

  In order to solve the conventional problem, a wireless communication device and a program according to the present invention include a header transmission number detection unit that detects repeated transmission number information of a header, and header transmission number information detected by the header transmission number detection unit. Accordingly, a header transmission frequency determining means for determining the number of times of repeated transmission of the header part, a wireless transmission means for repeatedly transmitting the header part n times, and a control means for controlling the respective means are provided.

  Thus, the control means determines the number of repeated transmissions of the header part transmitted from the wireless transmission means based on the header transmission number information detected by the header transmission number detection means using the header transmission number determination means. To do.

  In addition, the program of the present invention causes a computer to realize at least a part of the functions of the wireless communication device. Accordingly, since it is a program, at least a part of the wireless communication apparatus of the present invention can be easily realized by cooperating hardware resources such as an electric / information device, a computer, and a server. In addition, the program can be distributed / updated and installed easily by recording on a recording medium or distributing the program using a communication line.

  The wireless communication apparatus and program of the present invention can vary the number of times the header section is repeatedly transmitted according to the situation, so that the communication time can be shortened and efficient data communication can be performed.

1st invention is the radio | wireless receiving means which receives a radio | wireless message | telegram, the header detection means which analyzes the content of the header part contained in the radio | wireless message received by the radio | wireless reception means, The content of the header part analyzed by the header detection means A header transmission number determining means for determining the number of repeated transmissions of the header part based on the header, and a wireless transmission means for repeatedly transmitting the header part based on the number of repeated transmissions of the header part determined by the header transmission number determining means. Send times
The number determining means determines that the number of repeated transmissions is m times when the header detecting means detects a header part used in communication of the own system, and the header part other than the header part used in communication of the own system by the header detecting means. When is detected, the number of repeated transmissions is determined to be n, and the number of repeated transmissions is set to m> n. According to this, since the number of repeated transmissions of the header part can be varied according to the situation, the communication time can be shortened and efficient data communication can be performed. Further, when the communication partner receives a radio wave including the wireless system identification code of the own system, the number of repeated transmissions of the header portion can be increased, so that reliable and efficient data communication can be performed.

The second invention is a program for causing a computer to realize at least a part of the functions of the wireless communication apparatus according to the first invention , thereby cooperating hardware resources such as electrical / information equipment, a computer, and a server. At least a part of the wireless communication device of the present invention can be easily realized. In addition, the program can be distributed / updated and installed easily by recording on a recording medium or distributing the program using a communication line.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a block diagram of a wireless communication apparatus according to the first embodiment of the present invention.

  In FIG. 1, the wireless communication device 1 includes a header transmission count detection unit 2 that detects header repeat transmission count information, and the header unit repeat transmission count according to the header transmission count information detected by the header transmission count detection unit 2. Header transmission frequency determination means 3 for determining the wireless transmission means 5 connected to the antenna 4 and repeatedly transmitting the header portion n times, the external communication means 7 being an interface for communicating with the home appliance 6, It is comprised with the control means 8 which controls each means.

  FIG. 2 shows an example of a wireless communication system using the wireless communication apparatus 1 in the present embodiment. In FIG. 2, a block configured by the communication processing unit 9 and the wireless communication device A10 is a home controller, and a block configured by the wireless communication device B11 and the air conditioner 12 is a network-compatible home appliance controlled by the home controller. Although not shown in FIG. 2, the home controller has a touch panel, and can control the air conditioner 12 by pressing a button on the touch panel. The wireless communication device A10 constituting the home controller and the wireless communication device B11 connected to the air conditioner 12 are connected by a protocol using a specific low-power radio wave in the 429 MHz band.

  As a protocol using a specific low-power radio wave in the 429 MHz band, standardized protocols such as a gas automatic meter reading protocol and an Echonet (R) protocol are conceivable.

  The wireless communication device A10 or the wireless communication device B11 in FIG. 2 corresponds to the wireless communication device 1 in FIG. The communication processing unit 9 or the air conditioner 12 in FIG. 2 corresponds to the home appliance 6 in FIG. Here, a message structure transmitted and received between the wireless communication device A10 and the wireless communication device B11 in FIG. 2 will be described with reference to FIG.

  In FIG. 3, (1) shows the entire data format configuration. In (1) of FIG. 3, the section (a) is called a header portion, and (bit synchronization signal 1 + frame synchronization signal 1 + data signal 1) is set to correspond to a reception method in which a plurality of channels are sequentially scanned as a reception channel and waits. This block is repeatedly transmitted n times as one block. The section (b) is an information part including data. The section (c) is a signal indicating the end of transmission, but may not be present.

  The detailed configuration of data 1 is shown in FIG. The detailed structure of data 2 is shown in FIG. The data 1 includes destination information, that is, a receiving device identification code indicating a destination, and a partial wireless system identification code that is a part of a wireless system identification code that identifies whether the system belongs to itself. The partial radio system identification code is obtained by dividing the radio system identification code into three parts. For example, if the radio system identification code is 12 digits, the upper 4 digits, the middle 4 digits, and the lower 4 digits are divided into 3 and inserted in order. ing. Data 2 includes a wireless system identification code and a transmission device identification code indicating a transmission source.

  For example, when the receiving side sequentially scans and waits for three channels, whether or not it is a wireless message addressed to its own device is obtained by receiving and comparing the partial wireless system identification code of the header part (a) and the receiving device identification code. judge. Therefore, in order to determine whether the message is addressed to the own device, the partial radio system identification code is obtained by dividing the radio system identification code into three parts, so that the worst three header parts may be required per channel. Therefore, in the case of 3 channels, it can be reliably received by repeatedly transmitting the header part 9 times. Whether or not the broadcast is broadcast is determined by a certain bit of the control code 1 and a pattern of the receiving device identification code.

  The operation and action of the wireless communication apparatus configured as described above will be described below with reference to the communication sequence diagram shown in FIG.

  First, a communication sequence until the air conditioner 12 is turned on by controlling the operation of the air conditioner 12 from the communication processing unit 9 of the home controller will be described.

  The communication processing unit 9 transmits an operation ON request message indicating that “turn on the air conditioner” to the wireless communication device A10 (S1). The control means 8 in the wireless communication apparatus A10 receives the operation ON request message via the external communication means 7, and the message to be wirelessly transmitted using the header transmission number detection means 2 is a message that does not require normal urgency. Or whether it is an urgent message. Then, using the header transmission frequency determination means 3, the number of repeated transmissions of the header portion is determined based on header transmission frequency information stored in advance in a memory (for example, EEPROM which is a nonvolatile memory).

  Here, since the air conditioner operation ON does not require urgency, the number of repeated transmissions in the header part is set to 3 and a wireless telegram (operation ON request) is transmitted from the wireless transmission means 5 via the antenna 4 (S2). ). That is, the header part (section (a) in FIG. 3) transmits the block of (bit synchronization signal 1 + frame synchronization signal 1 + data signal 1) three times to the wireless communication apparatus B11 of the communication partner.

  On the other hand, when the wireless communication device B11 receives the wireless message (operation ON request) of the air conditioner via the antenna 4 under the control of the control means 8, the operation ON request message is transmitted to the air conditioner 12 via the external communication means 7. Transmit (S3). When the air conditioner 12 receives the operation ON request message, the air conditioner 12 starts the air conditioning operation. As described above, even when the wireless communication device B11 is waiting for reception while performing the channel scan operation of the three channels, the wireless communication device A10 is in the absence of radio waves from other wireless communication devices in the first channel and the second channel. Since the wireless message to be transmitted can be received, the number of repeated transmissions in the header portion is set to three.

  Next, a case will be described in which an urgent event such as a failure occurs from the air conditioner 12 and the home controller is notified.

  The air conditioner 12 transmits an emergency message stating “emergency event has occurred” to the wireless communication device B11 (S4). The control unit 8 in the wireless communication apparatus B11 receives the emergency message via the external communication unit 7, and uses the header transmission count detection unit 2 to determine whether the message to be transmitted wirelessly is a message that does not require urgency. It is determined whether the message requires. Then, the header transmission frequency determination means 3 is used to determine the repeated transmission frequency of the header part.

  Here, since the emergency message requires urgency and certainty, the header is repeated so that the radio communication apparatus A10 can receive the radio wave from the other radio communication apparatus in the first channel and the second channel. The number of transmissions is set to 9, and a wireless telegram (emergency telegram) is transmitted from the wireless transmission means 5 (S5). That is, the header part (section (a) in FIG. 3) transmits the block of (bit synchronization signal 1 + frame synchronization signal 1 + data signal 1) 9 times repeatedly to the wireless communication apparatus B11 of the communication partner. On the other hand, in the wireless communication device A10, when the control unit 8 receives the wireless message (emergency message) via the antenna 4, the emergency message is transmitted to the home controller via the external communication unit 7 (S6).

  These operations are shown in the flowchart of FIG. As described above, the control unit 8 uses the header transmission count detection unit 2 to determine whether the wireless transmission message (S7) received via the external communication unit 7 is urgent (S8). Then, the number of repeated transmissions is determined using the header transmission number determination unit 3 (S9, S10), and the transmission is performed using the wireless transmission unit 5 (S11).

  Therefore, since the control means 8 can determine the number of repeated transmissions of the header part based on the message type or the like, it is always assumed that the number of repeated transmissions is the worst in an environment where there is not much radio waves from other devices. The communication time can be shortened and efficient data communication can be performed as compared with the case where the setting is set to once. In addition, a message that is surely transmitted wirelessly can be reliably wirelessly communicated by setting the number of repeated transmissions in the header part to nine.

  In this embodiment, since the number of repeated transmissions of the header part is set to 3, when the communication partner apparatus cannot receive a wireless message, a method of instructing retransmission from the home appliance 6 or the person who operates the button again A method for transmitting a wireless telegram by operating the above or the like is conceivable.

  In the present embodiment, the header transmission count detection means 2 has been described as detecting the type of radio message, but there is also a method for determining the number of repeated transmissions of the header part according to the time zone, provided with a time means for measuring time. Conceivable. A method of detecting the device type of the home appliance 6 and determining the number of repeated transmissions of the header part based on the device type is also conceivable. For example, for an emergency call device and a fire sensor, a method in which the number of repeated transmissions of the header part is always nine is considered.

  The number of repeated transmissions of the header portion has been described as 3 times and 9 times, but these may be an integer multiple of the number of channels used.

Further, for example, a method of setting the number of repeated transmissions n of the header part to the number of times between 1) and 2) shown below can be considered.
1) The number of repeated transmissions ≧ the number of repetitions corresponding to the intermittent reception waiting of the communication partner + the minimum value of the number of repetitions necessary for identifying the communication partner (three times in this embodiment).

  2) The number of repetition transmissions ≧ the number of repetitions corresponding to the intermittent reception waiting of the communication partner + the maximum value of the number of repetitions necessary for identifying the communication partner (9 in this embodiment).

  Note that the minimum number of repetitions required to identify the communication partner is the number of repetitions when there are multiple channels to be used and there is no ideal noise environment or radio message of other devices in each channel. The maximum number of repetitions required for identifying the communication partner is that each channel has the same receiving device identification code as that of its own device, and there is a wireless message in which one of the partial wireless system identification codes is different (worst radio wave (In the case of the environment).

(Embodiment 2)
FIG. 6 shows an example of a communication sequence of the wireless communication apparatus according to the second embodiment of the present invention. The difference from the first embodiment is that a retransmission detecting means (not shown) for detecting the number of retransmissions of the radio transmission message is provided instead of the header transmission number detecting means 2.

  The operation and action of the wireless communication apparatus configured as described above will be described below with reference to the communication sequence diagram shown in FIG.

  A communication sequence in which the operation of the air conditioner 12 is turned on from the communication processing unit 9 of the home controller and the air conditioner 12 is turned on will be described.

  The communication processing unit 9 transmits an operation ON request message to the effect that “turn on the air conditioner” to the wireless communication device A10 (S7). The control means 8 in the wireless communication apparatus A10 receives the operation ON request message via the external communication means 7, and uses the retransmission detection means to detect the number of retransmissions of the wireless message to be wirelessly transmitted. Then, using the header transmission number determination means 3, the number of repeated transmissions of the header portion is determined based on the number of retransmissions.

  Here, first, the control means 8 detects that the number of retransmissions of a wireless message (operation ON request) to be wirelessly transmitted is 0 using the retransmission detection means. Then, the header transmission count determining means 3 is used to determine that the header section repeat transmission count is three, and the header section repeat transmission count is set to the wireless communication apparatus B11 via the radio transmission means 5 and the antenna 4. The transmission is performed three times (S8). However, since the control means 8 in the wireless communication apparatus A10 cannot receive the ACK message, which is a response message for the transmission of the previous wireless message (operation ON request) (S9), it performs the retransmission process of the wireless message (operation ON request). At this time, since the number of retransmissions of the wireless message (operation ON request) to be wirelessly transmitted is detected by using the retransmission detection unit, the control unit 8 determines the header part determined by the header transmission number determination unit 3. Transmission is performed to the wireless communication apparatus B11 via the wireless transmission means 5 and the antenna 4 using the number of repeated transmissions of 6 (S10).

  However, similarly to the previous case, the control means 8 in the wireless communication apparatus A10 cannot receive an ACK message, which is a response message to the transmission of a wireless message (operation ON request) (S11), and therefore a retransmission process of the wireless message (operation ON request) At this time, since the number of retransmissions of the wireless message (operation ON request) to be wirelessly transmitted is detected by using the retransmission detection unit, the control unit 8 uses the header determined by the header transmission number determination unit 3 Using 9 times that is the number of repeated transmissions of the unit, the data is transmitted to the wireless communication device B11 via the wireless transmission means 5 and the antenna 4 (S12). Then, the ACK message is received (S13), and the retransmission process is terminated.

  On the other hand, in the wireless communication device B11, when the control unit 8 receives the wireless message (operation ON request) of the air conditioner via the antenna 4, the control unit 8 returns the ACK message to the air conditioner 12 via the external communication unit 7. The air conditioner is turned on by transmitting an operation ON request message. As described above, since the number of repeated transmissions of the header part can be varied based on the number of retransmissions detected by the retransmission detection means, it is possible to improve the reliability of wireless communication and reliably transmit a wireless message during retransmission. it can.

  In the previous embodiment, after receiving the operation ON request message, the air conditioner 12 transmits a response message for informing the home controller that the air conditioning operation has started via the wireless communication device B11 and the wireless communication device A10. It can also be done.

  In addition, although the number of repeated transmissions of the header portion has been described as 3, 6, and 9, this may be an integral multiple of the number of channels used.

  The wireless communication device A10 has been described as retransmitting the wireless message when the wireless message transmission cannot receive the ACK message. However, the wireless communication device A10 cannot receive a response message informing that the air conditioner 12 is turned on from the wireless communication device B11. In such a case, a method of retransmitting a wireless message may be considered.

(Embodiment 3)
FIG. 7 is a block diagram of a wireless communication apparatus according to the third embodiment of this invention.

  The difference from the first embodiment is that, instead of the wireless receiving means 13 for receiving a wireless message, the channel scanning means 14 for sequentially scanning a plurality of channels using the wireless receiving means 13, and the header transmission frequency detecting means 2, The carrier detecting means 15 for detecting the presence or absence of a carrier in the channel scanned by the scanning means 14 is provided.

  The operation and action of the wireless communication apparatus configured as described above will be described below with reference to FIG.

  When the control means 8 in the wireless communication apparatus 1 receives the wireless telegram transmitted from the wireless transmission means 5 and the antenna 4 from the home appliance 6 via the external communication means 7, the control means 8 transmits the wireless telegram from the wireless transmission means 5. Are used to sequentially scan a plurality of channels, and the carrier detection means 15 detects the presence or absence of carriers in the scanned channels.

  For example, as described in the previous embodiment, in the case of a wireless communication system using three channels, the control unit 8 uses the antenna 4, the channel scanning unit 14, and the carrier detection unit 15, and the first and second channels. When the carrier is detected in the channel, the wireless transmission unit 5 transmits the third channel by using the repeated transmission number 5 times of the header part determined by the header transmission number determination unit 3. When the carrier is detected only in the first channel, transmission is performed from the wireless transmission unit 5 on the second channel or the third channel using the repeated transmission number of 4 times of the header portion determined by the header transmission number determination unit 3. . When the carrier is not detected in all the channels 1 to 3, using the header part repetition transmission number 3 determined by the header transmission number determination means 3 (minimum header part repetition transmission number), The wireless transmission means 5 is used to transmit on any one of channels 1 to 3.

  For example, the number of repeated transmissions n of the header part is determined as follows in consideration of the number of repetitions corresponding to the intermittent reception waiting of the communication partner, the number of repetitions necessary for identifying the communication partner, and the number of channels in which the carrier is detected. A method is conceivable.

  Repeat transmission count ≥ Repeat count corresponding to the communication partner's intermittent reception standby + Repeat count necessary to identify the communication partner + (Repetition count necessary to determine whether it is a noise or a wireless message including a bit synchronization signal) x carrier Number of detected channels.

  In this embodiment, the number of repetitions corresponding to the intermittent reception waiting of the communication partner (intermittent reception cycle / 1 repetition header long time) is 0 for continuous reception, and the number of repetitions necessary for identifying the communication partner is shown in FIG. Since the partial wireless system identification code in) is a wireless system identification code divided into three parts, the number of repetitions required to determine whether it is a wireless message containing noise or a bit synchronization signal is assumed to be one time. Yes.

  Therefore, since the number of repeated transmissions of the header portion can be varied based on the presence or absence of the carrier detected from the carrier detection means 15, it is possible to reliably perform efficient data communication depending on the situation.

  In the present embodiment, the control means 8 has been described as detecting the carrier using the antenna 4, the channel scanning means 14 and the carrier detection means 15 before the transmission of the radio message. However, the carrier detection means 15 is periodically changed. A method is also conceivable in which a carrier is detected by using it, a history at that time is stored, and the number of repeated transmissions of the header portion is varied based on the stored history.

  In the present embodiment, instead of the carrier detection means 15, a header detection means (not shown) for detecting a header part included in the received telegram is provided, and the control means 8 in the wireless communication apparatus 1 is the home appliance 6. When a wireless telegram transmitted from the wireless transmission means 5 and the antenna 4 is received via the external communication means 7, a plurality of channels are sequentially scanned for transmission from the wireless transmission means 5 using the channel scanning means 14, and header detection is performed. The presence or absence of a header in the scanned channel is detected by means.

  For example, as described in the previous embodiment, in the case of a wireless communication system using three channels, the control unit 8 uses the antenna 4, the channel scanning unit 14, and the header detection unit, and the first and second channels. When the header is detected by the eye, transmission is performed from the wireless transmission means 5 on the third channel using the repeated transmission count 9 times of the header portion determined by the header transmission count determination means 3. When the header is detected only in the first channel, transmission is performed from the wireless transmission means 5 on the second channel or the third channel using the repeated transmission count of the header portion determined by the header transmission count determination means 3. . When headers are not detected in all the channels 1 to 3, using the header part repetition transmission number 3 determined using the header transmission number determination means 3 (minimum header part repetition transmission number), The wireless transmission means 5 is used to transmit on any one of the first to third channels.

  Thus, since the number of repeated transmissions of the header part can be varied based on the header part detected from the header detection means, it is distinguished whether it is noise or radio wave (the header part is not detected if it is noise) Therefore, efficient data communication can be performed reliably.

  In the present embodiment, the number of repeated transmissions of the header part is set to be larger when the header part is detected than when noise is detected. This is because the determination time on the receiving side is different, and the time for shifting to the next channel becomes longer.

  Further, when the control means 8 analyzes the contents of the header portion detected by the header detection means, and there is a radio wave including the same partial radio system identification code (header portion shown in FIG. 3A) as the own system, By setting the number of repeated transmissions of the header part to m, n times other than the above, and m> n for the number of repeated transmissions, the communication partner can transmit radio waves including the same partial wireless system identification code as its own system. In the case of reception, since the number of repeated transmissions of the header portion can be increased, efficient data communication can be performed reliably (the partial wireless system identification code shown in FIG. Since the wireless system identification code shown in (3) is divided into three parts, it is necessary to receive the maximum header part three times in order to determine whether it is a radio wave addressed to its own device or a radio wave addressed to another device. Therefore, if the partial wireless system identification codes match, it is necessary to increase the number of times of repeated transmissions. If the signal is received once, it can be determined whether the radio wave is addressed to its own device or to another device).

  In this embodiment, the bit synchronization 1 shown in FIG. 3A is used as the header section, and the control section 8 repeatedly transmits the header section depending on whether the header detection section detects bit synchronization 1 or not. A method of changing the number of times is also conceivable.

  In this embodiment, the bit synchronization 1 and the partial radio system identification code in the repetitive header part of FIG. 3A have been described, but the bit synchronization 2 and the radio system identification code in FIG. 3B are used. Thus, a method of changing the number of repeated transmissions of the header part is also conceivable.

  In the first to third embodiments, it has been described that the number of repeated transmissions of the header portion is variable depending on the situation of the wireless device 1, but as shown in the block diagram of FIG. By providing the header part storage means 16 for storing the number of repeated transmissions of the header part, the control means 8 acquires the number of repeated transmissions of the header part stored in the header part storage means 16 and the header transmission number determination means 3 It is also possible to use the number of repetitions determined by using.

  The number of repeated transmissions of the header part stored in the header part storage means 16 is determined by connecting a setting device such as a personal computer in place of the home appliance 6 via the control means 8 and the external communication means 7, and using a setting message from the setting device. A setting method, a method in which the control means 8 stores the number of repeated transmissions of the header part designated by the communication partner at the time of registration in the header part storage means 16 and the like can be considered.

  In addition to setting the number of repeated transmissions of the header portion from a setting device such as a personal computer, as described in the previous embodiment, whether the number of repeated transmissions of the header portion is variable or not in this embodiment. As described above, it may be possible to switch the setting using a setting message.

  As described above, since the control unit 8 uses the number of repeated transmissions of the header part stored in the header unit storage unit 16, the control unit 8 sets the number of repeated transmissions of the header and the wireless communication apparatus in which the number of repeated transmissions of the header unit is fixed in advance. A wireless system in which variable wireless communication devices are mixed can be configured, and an optimal wireless system can be provided according to the application. For example, in a wireless system including an emergency notification wireless device, a fire notification wireless device, etc., for these devices, there is a method of setting the number of repeated transmissions of the header part to 9 times so that the partner communication device can always receive it. Conceivable.

  In the first to third embodiments, the air conditioner 12 is described as an example of the home appliance 6. However, the home appliance 6 includes a crime prevention sensor, an infrared sensor, a glass break sensor, a magnet sensor, a shock sensor, a flame sensor, a human body. The same can be applied to security devices such as detection sensors, gas leak sensors, ultrasonic sensors, and weight sensors.

  In the first to third embodiments, the case where three channels are received has been described. However, the number of channels is not limited to this. If the communication channel increases or decreases, the number of repeated transmissions of the header portion may be increased or decreased accordingly.

  In the first to third embodiments, the wireless system may include two or more wireless communication devices that scan a plurality of predetermined channels, and is limited to the embodiment. is not.

  In the first to third embodiments, at least a part of the functions can be executed by a computer program.

  The means described in the first to third embodiments are hardware resources such as a CPU (or microcomputer), a RAM, a ROM, a storage / recording device, an electrical / information device including an I / O, a computer, a server, and the like. You may implement in the form of the program which cooperates. In the form of a program, new functions can be easily distributed / updated and installed by recording them on a recording medium such as magnetic media or optical media or distributing them via a communication line such as the Internet.

  As described above, the wireless communication apparatus and program according to the present invention can vary the number of times the header section is repeatedly transmitted according to the situation, so that the communication time can be shortened and efficient data communication can be performed. Therefore, the present invention is useful not only for home networks at home, but also as wireless communication devices that perform data communication.

1 is a block diagram of a wireless communication apparatus according to Embodiment 1 of the present invention. Block diagram of a communication system using the same wireless communication device The figure which shows the data format which the radio | wireless communication apparatus transmits Communication sequence diagram of a communication system using the same wireless communication device Flow chart of the wireless communication device Communication sequence diagram of a communication system using the wireless communication device according to the second embodiment of the present invention Block diagram of radio communication apparatus according to Embodiment 3 of the present invention Block diagram of the same wireless communication device The figure which shows the data format which the conventional radio | wireless communication apparatus transmits The figure explaining operation | movement of the radio | wireless communication apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Radio | wireless communication apparatus 2 Header transmission frequency detection means 3 Header transmission frequency determination means 5 Wireless transmission means 8 Control means 13 Radio reception means 14 Channel scanning means 15 Carrier detection means 16 Header part storage means

Claims (2)

In a wireless communication device that transmits an information part including data after repeatedly transmitting the header part n times,
Wireless receiving means for receiving a wireless message;
Header detection means for analyzing the contents of the header part included in the wireless message received by the wireless reception means;
Header transmission frequency determination means for determining the number of repeated transmissions of the header part based on the contents of the header part analyzed by the header detection means ;
Wireless transmission means for repeatedly transmitting the header part based on the number of repeated transmissions of the header part determined by the header transmission number determination means ,
The header transmission frequency determination means includes
When the header part used in communication of the own system is detected by the header detection means, the number of repeated transmissions is determined as m times,
When the header detection unit detects a header part other than the header part used in communication of its own system, the number of repeated transmissions is determined as n times,
A wireless communication apparatus in which the number of repeated transmissions is m> n . The program for making a computer perform at least one part of the function of the radio | wireless communication apparatus of Claim 1 .