JP2011199803A - Radio reception start control device, microcomputer for radio receiver and application system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that when it is determined that a telegraphic message that a radio receiver has received is not addressed to its own, and that a carrier output is present, a radio receiving operation can not be stopped unless a specific time-out time passes even when the telegraphic message is not addressed to its own, and that any unnecessary current consumption is generated in the radio receiver as a result.SOLUTION: This radio reception start control device is provided with: an other equipment addressed pattern determination means E10 for checking a telegraphic message received by radio communication, and for determining whether the telegraphic message includes an other equipment addressed pattern; and a radio power source control means E20 for performing the power saving control of a radio power source when the determination result of the other equipment addressed pattern determination means E10 shows that the telegraphic message is addressed to the other equipment.

Description

  The present invention relates to a radio reception activation control device used for activation control of a radio receiver, and more particularly to a technique for reducing power consumption of radio reception control. The present invention also relates to a microcomputer used for a wireless receiver and its application system (wireless house alarm system, automatic meter reading system, entry system).

  In recent years, many set products using a wireless communication function have appeared due to their convenience. Among these, products that operate using a battery as a driving power source are demanded from the viewpoint of portability, and products characterized by low power consumption are increasing. In particular, products intended to operate without maintenance for a long period of time, such as wireless home alarms, are based on the assumption that they will operate on batteries for more than 10 years, and it is desirable to realize low power consumption as soon as possible. Yes.

  Hereinafter, a conventional wireless receiver will be described with reference to the drawings. FIG. 8 is a block diagram showing the configuration of a wireless receiver in the prior art.

  In the wireless receiver 100, the signal received by the wireless reception antenna unit 1 is demodulated into a digital signal by the radio wave demodulation unit 2 and stored in the reception data buffer 4. When the radio wave demodulator 2 demodulates an analog signal into a digital signal, the carrier output detector 3 is used to measure the strength (electric field strength) of the radio wave received by the radio receiving antenna unit 1, and the result is a wireless communication function. The control unit 8 notifies the carrier output presence / absence determining means 9. The carrier output presence / absence determination means 9 performs carrier sense processing based on the electric field strength received from the carrier output detection unit 3 and a threshold set according to the specifications. At this time, if the received electric field strength is less than the threshold value, it is determined that there is no radio wave in the frequency band to be received, and the power supply is cut off by the wireless power supply control means 12 to reduce power consumption. On the other hand, if the received electric field strength is greater than or equal to the threshold value, it is determined that there is a radio wave in the frequency band to be received, and the wireless power supply control means 12 continues to supply power, and the operation of the pattern comparison means 6 addressed to itself is started. .

  When the operation of the pattern comparison means 6 addressed to its own device is started, the frame patterns of the pattern buffer 5 and the reception data buffer 4 addressed to the own device having the comparison data addressed to the own device defined in advance by the wireless communication function control unit 8. Compare with. At this time, if the contents of the pattern buffer 5 addressed to the own device and the contents of the received data buffer 4 match, the wireless communication function control unit 8 is notified that the patterns match.

  When notified that the frame pattern included in the received data matches the defined pattern addressed to its own device, the wireless communication function control unit 8 receives data from the next bit onward as this data. As a result, data stored in the reception data buffer 4 starts to be transferred from the confirmed reception data transfer unit 7 to the wireless communication function control unit 8.

  However, in the frequency band to be received by the wireless receiver 100, so-called noise that is not transmission data is always present. When noise exists, the carrier output detection unit 3 erroneously determines that there is a radio wave in the frequency band to be received (false sense). At this time, the pattern comparison means 6 addressed to itself starts the comparison operation and examines the data. Of course, the frame pattern does not match because of a false sense.

  Assuming such a case, in order to stop useless comparison processing, a method of stopping the reception processing operation after a certain time (timeout time) has been prepared. However, power is supplied until the timeout time elapses after erroneous detection, and wasteful power is consumed.

  Therefore, a time until communication scheduled to be performed next is described in a part of transmission data transmitted from the transmitter, and when the wireless receiver 100 receives the data, the intermittent reception cycle control means 11 is scheduled to perform next time. There is a method of applying the communication time. As a result, the transmitter controls the carrier sense period implemented using the carrier output detection unit 3, thereby reducing the possibility of erroneous sensing as much as possible. As a result, efficient communication is realized, and current consumption generated while waiting for the timeout time is reduced. Such a transmission method is described in Patent Document 1, for example.

JP 2006-325055 A

  The conventional technology aims to reduce power consumption as described above, but this is a system with only one transmitter and one receiver (1: 1 communication), and one transmitter and a plurality of receivers. (1: N communication) and a system having a plurality of transmitters and a plurality of receivers (N: N communication) cannot be effective. When there are a plurality of transmitters, it is necessary to communicate the next transmission time between the transmitters and to take timing between the transmitters. In addition, even if there is only one transmitter, there are actually many transmitters of other systems that are not equipped with the technology described in Patent Document 1. Eventually, the increase in current consumption due to false sensing Inevitable.

  The present invention was created in view of such circumstances, and provides a wireless reception activation control device that shortens the time required to perform power saving control of a wireless power supply and enhances the power saving effect. It is an object.

  << 1 >> The present invention concerning the radio reception activation control device takes the following means in order to solve the above-mentioned problems. In order to facilitate understanding, description will be made with reference to FIG. 1 (however, the present invention is not limited by this figure).

  A message received in wireless communication is checked, and it is positively determined whether or not the message includes a pattern addressed to another device. As this determination means, pattern determination means E10 addressed to another machine is provided. Here, it is assumed that the pattern addressed to the other device is known in advance, and the known pattern addressed to the other device is registered in the pattern determination unit E10 addressed to the other device. The pattern determination means E10 destined for the other machine actively checks whether it is destined for the other machine while waiting for detection confirmation that it is destined for the own machine by a separate means. It becomes clear whether it is destined for the own device or another device earlier than the case of simply waiting for the confirmation of the detection that it is destined for the own device. If it is determined that it is destined for another device, it means that it is not destined for the own device, and if so, the wireless power source may be immediately subjected to power saving control. While it is not known that it is destined for the other machine, it is uncertain whether it is destined for the own machine or the other machine, but if it becomes clear that it is destined for the own machine by another means, This means that it is not addressed to the device, and since it is addressed to the own device, the wireless power source may be kept in the power supply state. Wireless power supply control means E20 is provided as means for power saving control of the wireless power supply. The wireless power source control means E20 immediately controls the power of the wireless power source when the determination result by the pattern determination means E10 addressed to the other device indicates that the address is directed to the other device. The wireless power supply control means E20 may control the wireless power supply for power saving even when the carrier sense is negative.

  As for the means for checking addressed to the own device, the present invention itself may not necessarily be an essential requirement.

In short, the wireless reception activation control device of the present invention is
A pattern determination unit E10 addressed to another device that checks a message received in wireless communication and determines whether the message includes a pattern addressed to the other device;
When the determination result by the pattern determination unit E10 addressed to the other device indicates that it is addressed to the other device, the wireless power source control unit E20 that performs power saving control of the wireless power source is provided.

  In this configuration, the pattern determination unit E10 addressed to the other device is a unit that receives a message received by wireless communication and actively checks that the received message contains a pattern addressed to the other device. If it is confirmed by the determination by the pattern determination unit E10 addressed to the other device that the received message contains a pattern addressed to the other device, the fact is notified to the wireless power control unit E20. Receiving the notification, the wireless power control means E20 immediately controls the power of the wireless power supply. That is, the reception processing operation can be stopped without waiting for the timeout process.

  Here, consider a radio receiver having a pattern comparison means addressed to its own device but no pattern determination means E10 addressed to another device (equivalent to the prior art). The pattern comparison means addressed to the own machine checks whether or not the received message contains a pattern addressed to the own machine, but it takes a considerable time to determine this. There are various types of radio waves in the surrounding space, of which only a few are destined for this machine. Therefore, the average probability of the wireless communication including the pattern addressed to the own device is low. Since it is low, it takes time to determine whether a pattern addressed to the machine is included.

  On the other hand, in the present invention, the pattern determination means E10 intended to actively detect the pattern addressed to the other machine is provided, so that the detection of the message including the pattern addressed to the other machine, that is, the message addressed to the other machine is accelerated. Since the time until power saving control of the wireless power source is shortened, the power saving effect is high.

  According to the present invention, since the pattern determination means addressed to the other device is provided and the pattern addressed to the other device is positively detected, the message including the pattern addressed to the other device, that is, the detection of the message addressed to the other device is accelerated, The time required until power saving control of the wireless power source is shortened, and the power saving effect can be enhanced.

The block diagram which shows the basic composition of the radio | wireless reception starting control apparatus of this invention 1 is a block diagram illustrating a configuration of a wireless receiver including a wireless reception activation control device according to a first embodiment of the present invention. Configuration diagram of transmission / reception data in an embodiment of the present invention The flowchart which shows operation | movement of the radio | wireless receiver in Example 1 of this invention. Timing chart showing operation of wireless receiver in embodiment 1 of the present invention The block diagram which shows the structure of the wireless house alarm system in Example 2 of this invention (the 1) The block diagram which shows the structure of the wireless house alarm system in Example 2 of this invention (the 2) The block diagram which shows the structure of the radio receiver in a prior art

  The wireless reception activation control device of the present invention having the above configuration <1> can be further advantageously developed in the following embodiment.

  <2> The configuration of the above <1> will be examined at a more specific level. It is only necessary to know in advance what kind of pattern is addressed to other machines, but this is not necessarily the case. In the case of << 1 >>, it is assumed that a known pattern destined for another machine is preset in the pattern determination means E10 destined for the other machine. In this section << 2 >>, it is assumed that an unknown pattern is targeted as a pattern addressed to another device.

  Therefore, the patterns addressed to other devices are collected in actual wireless communication conditions during actual use, and the collected patterns addressed to other devices are set in the pattern determination means E10 addressed to other devices. As means for that purpose, means for collecting and setting patterns addressed to other devices is provided. This means checks a message received in wireless communication, and extracts a pattern detected in a state where a pattern addressed to the own device is not detected as a pattern addressed to the other device, and pattern extraction addressed to the other device. It is configured to include a pattern setting unit E12 addressed to the other machine that sets the pattern addressed to the other machine extracted by the means E11 to the pattern determination unit E10 addressed to the other machine (see FIG. 1).

  According to this structure, even if the other apparatus destined patterns not know whether pre What, in actual radio communication environment in situ incorporation of other machine destined pattern from the radio apparatus itself captured, The captured pattern destined for the other device can be effectively used for power saving control.

In short, in the configuration of << 1 >> above, this section further collects patterns addressed to other devices in a wireless communication situation, and sets the collected patterns addressed to other devices as pattern determination means E10 addressed to other devices.
A pattern extraction means E11 addressed to another machine that checks a message received in wireless communication and extracts a pattern detected in a state where a pattern addressed to the own machine is not detected;
It is configured to include a pattern setting unit E12 addressed to the other device that sets the pattern addressed to the other device extracted by the pattern extraction unit E11 addressed to the other device in the pattern determination unit E10.

  A pattern detected and collected in a state where a pattern addressed to the own device is not detected can be held as a pattern addressed to another device. In other words, by dynamically capturing patterns addressed to other devices from messages addressed to other wireless receivers, it is possible to immediately confirm that the message is addressed to another device even if reception starts due to a false sense. It is possible to determine, and it is possible to stop the reception processing operation without waiting for the timeout process.

  << 3 >> The pattern extraction means E11 destined for the other machine in the configuration of the above << 2 >> is examined. In this section, the pattern extraction means E11 addressed to the other device is configured as a frame synchronization boundary detection means having a function of detecting the boundary between the bit synchronization pattern and the frame pattern in the received data. The frame synchronization boundary detection means is configured to send the message after the completion of the bit synchronization pattern as a pattern addressed to the other machine to the pattern setting means E12 addressed to the other machine.

  With this configuration, it is possible to collect and hold frame patterns uniquely lent by each system as patterns addressed to other devices.

  << 4 >> The pattern setting means E12 destined for the other machine in the above-described configurations << 2 >> and << 3 >> will be examined. In this section, the pattern setting means E12 addressed to the other device counts the patterns addressed to the other device sent from the pattern extraction means (frame synchronization boundary detection means) E11 addressed to the other device, and sets the patterns addressed to the other device for detection addressed to the other device. It is configured to send to the pattern determination means E10 addressed to another machine. Further, the pattern determination unit E10 addressed to the other machine is configured to make a determination addressed to the other machine using the pattern addressed to the other machine sent from the pattern setting unit E12 addressed to the other machine.

  With this configuration, unique frame patterns in each system are aggregated as patterns addressed to other devices. Furthermore, it is used for the determination addressed to the other machine as a pattern addressed to the other machine. As a result, as in << 1 >>, the detection of a message addressed to another device is accelerated, and the time until power saving control of the wireless power source is shortened, so that the power saving effect is high.

  << 5 >> In the configurations of the above << 1 >> to << 4 >>, it is conceivable that the wireless form is a specific low power wireless. If the specific low power radio is adopted, the effect of reducing power consumption can be further promoted, which is particularly advantageous for a battery-operated system.

  <6> In connection with the above-described wireless reception activation control device, there is a development as a microcomputer for a wireless receiver. That is, the message received by the wireless communication is checked, and whether the message contains a pattern addressed to another device is determined by the pattern determination means E10 addressed to the other device and the determination result by the pattern determination means E10 addressed to the other device. The microcomputer is equipped with wireless power control means E20 for controlling power saving of the wireless power supply when addressing to the machine. By providing the wireless reception function to the microcomputer, it is possible to reduce the size and power consumption of the device.

  << 7 >> Further, in connection with the above-described wireless reception activation control device, there is a development as a wireless house alarm system. It is a wireless home alarm system composed of one or more transmitters and one or more receivers. Here, the transmitter has a sensor function, and is configured to transmit an alarm signal to the wireless receiver when the sensor function is activated. The wireless receiver is any one of the above << 1 >> to << 5 >>, further having an alarm function, and configured to operate the alarm function when an alarm signal is received from the transmitter. ing. If comprised in this way, in a wireless house alarm system, the battery life of a radio receiver will become long and it will become possible to construct a highly reliable system.

  <8> Further, in connection with the above-described wireless reception activation control device, there is a development as an automatic meter reading system for an electric meter, a gas meter, or a water meter. It is an automatic meter reading system composed of one or more transmitters and a wireless receiver. Here, the transmitter has a meter reading function, and is configured to transmit a meter reading information signal to the wireless receiver when the meter reading function is activated. The wireless receiver is one of the above << 1 >> to << 5 >>, further has a meter reading information collecting function, and operates the meter reading information collecting function when receiving a meter reading information signal from the transmitter. The meter reading information for each transmitter is collected. If comprised in this way, in the automatic meter-reading system, the battery life of a radio receiver will become long and it will become possible to construct a highly reliable system.

  << 9 >> Also, in connection with the above-described wireless reception activation control device, there is a development as an entry system. It is an entry system composed of a transmitter and a wireless receiver. Here, the transmitter has a function of generating a wireless transmission request by operating an interface, and when the transmission request generation function is activated, transmits a unlocking signal or a locking signal to the wireless receiver. It is configured as. The wireless receiver is any one of the above << 1 >> to << 5 >>, and further has an unlocking and locking function, and is opened when receiving an unlocking signal or a locking signal from the transmitter. It is configured to operate a lock or lock function. If comprised in this way, in the entry system, the battery life of a radio | wireless receiver will become long and it will become possible to construct | assemble a highly reliable system.

  << 10 >> A preferable entry system having the above-described structure <9> is configured such that the transmitter is mounted on the car key, the wireless receiver is mounted on the car, and the opening and closing of the door lock of the car is controlled. There is something.

  Hereinafter, embodiments of a wireless receiver including the wireless reception activation control device of the present invention will be described with reference to the drawings. In addition, since the component which attached | subjected the same code | symbol in the Example performs the same operation | movement, description may be abbreviate | omitted again.

Example 1
FIG. 2 is a block diagram illustrating a configuration of a wireless receiver including the wireless reception activation control device according to the first embodiment of the present invention.

  As a component of the radio receiver 100, 1 is a radio reception antenna unit that receives transmission radio waves, 2 is a radio wave demodulation unit that demodulates radio waves received by the radio reception antenna unit 1 into data, and 3 is the strength of the received radio waves. Carrier output detector for measuring, 4 is a received data buffer for storing demodulated data, 5 is a pattern buffer addressed to its own device, 6 is a frame pattern in received data temporarily stored in the received data buffer 4 and a pattern addressed to its own device Pattern comparison means addressed to the own apparatus for comparing the frame pattern addressed to the own apparatus stored in the buffer 5, and 7 is a fixed reception data transfer for storing data immediately after the pattern comparison means 6 addressed to the own apparatus determines that the comparison matches. Means 8 is a wireless communication function controller. 9 is a carrier output presence / absence judging means for judging the strength of the radio wave measured by the carrier output detector 3, 10 is a wireless reception data processing means for processing data transmitted from the fixed reception data transfer means 7, and 12 is no carrier Wireless power supply control means (corresponding to E20 in FIG. 1) that terminates wireless reception when determination and data reception are completed. Reference numeral 21 denotes a frame synchronization boundary detecting means for detecting data after the bit synchronization pattern as a pattern addressed to another device. The frame synchronization boundary detection means 21 is an example of the configuration of the pattern extraction means E11 addressed to the other apparatus in FIG.

  Reference numeral 22 denotes a pattern buffer addressed to the other device which is detected by the frame synchronization boundary detection means 21 and is stored in the received data buffer 4. The pattern comparison means for the other machine for comparing the frame pattern in the received data with the pattern for the other machine stored in the pattern buffer 22 for the other machine, and 24 comprises the pattern buffer 22 for the other machine and the pattern comparison means 23 for the other machine. Pattern determination means (corresponding to E10 in FIG. 1) addressed to the other machine. 25, as a new component in the wireless communication function control unit 8, aggregates the patterns addressed to other devices detected from the frame synchronization boundary detection means 21, and sends the pattern to the pattern buffer 22 addressed to the other devices to set the pattern. Means (corresponding to E12 in FIG. 1). The wireless communication function control unit 8 includes a carrier output presence / absence determination unit 9, a wireless reception data processing unit 10, a wireless power supply control unit 12, and a pattern setting unit 25 addressed to another device.

  Note that the pattern destined for the other device stored in the pattern buffer 22 destined for the other device does not have to be one pattern, and it is possible to sequentially compare a plurality of patterns. That is, there may be a plurality of determination patterns destined for other machines determined by the pattern judgment unit 24 addressed to other machines.

  FIG. 3 shows the structure of data used for communication.

  Here, two types of data D and D * are considered. One data D is data that can be handled by the wireless receiver 100. The transmitter that transmits the data D belongs to the same system as the wireless receiver 100. The other data D * is data that cannot be handled by the radio receiver 100. The transmitter that transmits the data D * belongs to a system different from the system to which the wireless receiver 100 belongs.

  Data D in the same system is composed of a bit synchronization pattern P1, a frame pattern P2, and data P3. Similarly, the data D * in the heterogeneous system is composed of a bit synchronization pattern Q1, a frame pattern Q2, and data Q3.

  The leading bit synchronization patterns P1 and Q1 are fixed patterns (for example, data that alternately repeats “0”, “1” or “1”, “0”). The bit synchronization patterns P1 and Q1 are used for adjustment of data punching timing and frequency adjustment necessary for the wireless receiver to receive the subsequent frame patterns P2 and Q2 and data P3 and Q3. The frame patterns P2 and Q2 immediately after the bit synchronization patterns P1 and Q1 are patterns arranged immediately before the data P3 and Q3, respectively, and are unique patterns for each system. That is, the frame pattern P2 and the frame pattern Q2 are different from each other. The frame patterns P2 and Q2 indicate that the data P3 and Q3 are immediately after that.

  The data P3 is data that the radio receiver 100 actually needs. Data Q3 is data actually required by a wireless receiver of a system different from the system to which the wireless receiver 100 belongs. Here, it is assumed that the transmitter for transmitting the data D and the wireless receiver 100 are configured as the same system, and that the data D * exists in the same space as the wireless receiver 100. The frame pattern P2 of the data D is set in the pattern buffer 5 addressed to itself.

  Next, the operation of the wireless receiver 100 of the present embodiment configured as described above will be described with reference to the flowchart of FIG.

  First, in step S1, the radio reception antenna unit 1 receives a radio signal radio wave.

  Next, in step S2, carrier sense is performed on the radio wave received by the wireless reception antenna unit 1. This carrier sense is performed as follows. First, the radio wave demodulator 2 demodulates the received signal into digital data. Furthermore, the electric field strength (carrier) is measured by the carrier output detection unit 3. The measured electric field strength is sent to the carrier output presence / absence determining means 9 in the wireless communication function control unit 8. The carrier output presence / absence determining means 9 determines whether the electric field intensity of the received radio wave is greater than or equal to a specified threshold value or less than the threshold value. If it is less than the threshold value, it is determined that there is no carrier, so the process proceeds to step S10 (wireless power supply stop), the power supply is cut off by the wireless power supply control means 12, and the current consumption is reduced. On the other hand, if the electric field strength of the received radio wave is equal to or greater than the threshold value, it is determined that there is a carrier, and the process proceeds to step S3 (digital signal demodulation).

  Here, a rough flow of the operation after step S3 will be described. When the received data is not addressed to the own device (when addressed to another device), the flow proceeds from step S3 → S4 → S5 → S6 → S10. On the other hand, if the received data is addressed to the own device (not addressed to the other device), the flow is step S3 → S7 → S8 → S9 → S10.

  In step S 3, the radio wave demodulator 2 performs digital signal demodulation on the received signal, and sends the demodulated data to the received data buffer 4.

  Following the processing in step S3 is parallel processing of the routine in steps S4 to S5, the routine in step S6, and the routine in steps S7 to S9.

  (1) First, the routine of steps S4 to S5 will be described.

  In step S4, the frame synchronization boundary detection means 21 tries to detect the frame boundary. That is, an attempt is made to detect the boundary between the bit synchronization pattern P1 (Q1) and the frame pattern P2 (Q2) in the data D and D *. When the frame boundary is not detected, the process returns to step S3. When the frame boundary is detected, the process proceeds to step S5.

  Next, in step S5, the frame synchronization boundary detection means 21 acquires a pattern addressed to the other device from the data D *, and sends the acquired pattern addressed to the other device to the pattern setting means 25 addressed to the other device. The pattern addressed to the other device is a data pattern portion excluding the bit synchronization pattern Q1 in the received data D *. The pattern setting unit 25 addressed to the other device holds the pattern addressed to the other device received from the frame synchronization boundary detection unit 21. Further, the pattern addressed to the other machine is transferred to the pattern buffer 22 addressed to the other machine, and the process returns to step S3. When a plurality of patterns destined for other devices are held in the pattern setting means 25 destined for other devices, an appropriate one is selected and transferred to the pattern buffer 22 destined for the other devices.

  (2) Next, the routine of step S6 will be described.

  In step S6, in the pattern judgment unit 24 addressed to the other device, the pattern comparison unit 23 addressed to the other device selects the frame pattern of the received data D * temporarily stored in the received data buffer 4 in the pattern buffer 22 addressed to the other device. Compare with the pattern sent to the other machine. At this time, the pattern selected by the pattern setting unit 25 addressed to the other device is the one received from the frame synchronization boundary detection unit 21. If the two patterns do not match, the process returns to step S3. On the other hand, when both patterns match, the fact is notified to the wireless power control means 12 and the process proceeds to step S10 (wireless power stop). In step S10, the wireless power supply control means 12 cuts off the power supply and reduces the current consumption.

  A series of steps S4, S5, S6, and S10 described here is a point in this embodiment.

  (3) Next, the routine of steps S7 to S9 will be described.

  In step S7, the frame pattern in the data in the reception data buffer 4 is compared with the frame pattern destined for the own device of the pattern buffer 5 destined for the own device by the pattern comparison means 6 addressed to the own device. If the two patterns do not match, the process returns to step S3. On the other hand, when both patterns match, the process proceeds to step S8.

  Next, in step S8, data reception is started. That is, the wireless communication function control unit 8 that has received the notification of the pattern match activates the confirmed reception data transfer unit 7 and transfers the data after the match from the reception data buffer 4 to the wireless reception data processing unit 10. When the prescribed data has been received, the process proceeds to step S9.

  Next, in step S9, a data reception completion process is performed, and then the process proceeds to step S10 to notify the wireless power control means 12 and the power supply is cut off (wireless power supply stopped).

  In the above, when the processing result becomes negative in step S4, step S6, and step S7, the process returns to the digital signal demodulation process in step S3 again. Thereafter, the same operation is repeated again after receiving the next bit. .

  FIG. 5 is a timing chart for explaining the operation of the wireless receiver of this embodiment.

  Immediately after the determination that there is a carrier, wireless receiver 100 determines whether or not the transmission data is addressed to itself using a frame pattern. As described above, this frame pattern is unique to each system, and since the frame pattern (P2) addressed to itself is known in advance, when the prescribed data P3 is received as in R1, the reception operation is performed. Stop (operations in steps S7 → S8 → S9 → S10 in FIG. 4).

  However, since the frame pattern (Q2) of the different system is unknown, it is impossible to determine whether it is destined for the machine itself. Even if the data D * (Q3) is completely transmitted as in R2, it is stipulated. The reception processing operation cannot be stopped unless the time-out time elapses.

  Therefore, in this embodiment, the frame boundary detection operation in step S4 is performed by sending the data in the reception data buffer 4 to the frame synchronization boundary detection means 21 immediately after determining that there is carrier sense, and the bit synchronization pattern and the frame pattern are detected. Detect boundaries. Subsequent to the detection of the boundary, the pattern acquisition addressed to the other machine in step S5 is performed, and the pattern addressed to the other machine is sent to the pattern setting means 25 addressed to the other machine. As a result, it is possible to dynamically acquire the frame pattern Q2 of the data D * while determining that there is carrier sense for the data D * in R2 and starting comparison of the frame patterns. By using the frame pattern Q2 as a pattern addressed to the other device, even if it is determined again that the data D * has carrier sense in R3, the pattern determination means 24 addressed to the other device determines that it is addressed to the other device. It is determined that the device is not destined for the device, and the current consumption can be reduced by stopping the power supply of the wireless power supply (operation from step S6 to S10 in FIG. 4).

  As a method of detecting the boundary by the frame synchronization boundary detection means 21, for example, when the bit synchronization pattern is data that repeats “0” and “1” alternately (hexadecimal 0x55), it becomes “11”. If the bit synchronization pattern is data that repeats “1” and “0” alternately (hexadecimal 0xAA), it is sufficient to detect when it is “00”.

  In the vicinity of the boundary between the bit synchronization pattern and the frame pattern in the case where the bit synchronization pattern repeats 0x55, “... 01011011100110...” Is the first boundary, and the first part is “11”. The data including “1” is frame pattern data. In the case of a signal addressed to the own device, the number of bits for matching the frames is known in advance, so data of that number of bits is received, and if it is not a matching frame pattern, it is sent to the pattern setting means 25 addressed to the other device. To do. In the above case, the pattern addressed to the other device is “11100110...”.

  Actually, it is conceivable that the frame pattern of the data D * includes “01” similar to the bit synchronization pattern, such as “0111100110...”, “10111100110”. However, in any case, since the pattern “11100110...” Addressed to the other machine is used as the pattern addressed to the other machine, it is determined as the pattern addressed to the other machine, and there is no problem.

  Note that the pattern setting means 25 addressed to the other device counts the patterns addressed to the other device sent from the frame synchronization boundary detection means 21 and sets the pattern buffer 22 addressed to the other device with the highest possibility of mismatch detection. By doing in this way, the effect of reducing current consumption can be further increased. The highest possibility of mismatch detection is considered, for example, when a pattern addressed to the same other device is counted many times, or there is a frame pattern that occurs only in a certain time zone.

  In addition, the present invention can exert an effect in a radio receiver, and even if it is a conventional transmitter, a frame pattern always exists, so that the effect of the present invention can be obtained.

  In the above, in the system constructed by one transmitter and a plurality of receivers, the case where reception of data destined for another radio receiver transmitted by the transmitter is erroneously started has been described.

  However, as a matter of course, in a system constructed by a plurality of transmitters and a plurality of receivers, the same manner as described above can be realized even when data for other wireless receivers transmitted by the transmitter is erroneously started. Needless to say.

  In addition, in a system constructed with one transmitter and a plurality of receivers, when receiving data addressed to a wireless receiver of another system that is transmitted from a transmitter of another system by mistake, This is realized in the same manner as described above.

  In addition, in a system constructed with multiple transmitters and multiple receivers, when receiving data addressed to a wireless receiver of another system transmitted from a transmitter of another system by mistake, This is realized in the same manner as described above.

  As a result, the intended purpose is achieved by dynamically acquiring patterns addressed to other devices and comparing the patterns addressed to other devices.

(Example 2)
FIG. 6 is a block diagram showing a configuration of a wireless house alarm system according to the second embodiment of the present invention.

  The wireless house alarm system 300 includes a control microcomputer 31, a sensor 32, an alarm device 33, a radio transmitter 200, and a radio receiver 100. The wireless house alarm system 300 is controlled by the control microcomputer 31. The sensor 32 detects fire (heat) and smoke when a fire occurs, and the information is transmitted to the alarm device 33 and the wireless transmitter 200 via the control microcomputer 31. Upon receiving the fire occurrence information, the wireless transmitter 200 transmits the fire occurrence information to a plurality of other wireless house alarm systems in the house by a wireless communication function. At the same time, the alarm device 33 issues an alarm to the user. Each wireless house alarm system 300 is always in a reception waiting state, and when it receives fire occurrence information issued from another wireless house alarm system, it issues an alarm from its own alarm device 33.

  Because it is always waiting for reception, different systems send data, such as different systems other than the wireless home alarm system, and wireless home alarm systems installed in other homes even if it is a wireless home alarm system. Then, there is a possibility of starting reception due to erroneous sensing.

  However, by applying the present invention, once it is determined that the pattern is destined for another device, it can be determined that the system is different. Therefore, the reception processing operation can be quickly stopped, and a system that can share information wirelessly with different systems can be easily developed.

  In addition, the above system is generally battery-powered, and if the remaining battery level is low, it will not only interfere with the alarm operation, but also will not be able to wirelessly communicate with other interlocking alarm devices, possibly increasing the damage. There is. Therefore, by using the present invention, it is possible to realize a wireless house alarm system that satisfies a long battery life.

  Further, as shown in FIG. 7, the control microcomputer 31, the wireless receiver 100, and the wireless transmitter 200 in the wireless home alarm system 300 of FIG. 6 are included, and the wireless communication function to which the present invention is applied has a wireless communication function. Even if the microcomputer 250 is used, the same effect can be obtained. The wireless house alarm system 350 that detects fire and smoke notifies the fire occurrence information to the plurality of wireless house alarm systems in the house using the wireless transmission function of the control microcomputer 250 having a wireless communication function, An alarm is issued from the alarm device 33 to the user. When the wireless home alarm system 350 other than the fire source is received by the control microcomputer 250 having a wireless communication function issued from the fire source wireless home alarm system, the alarm 33 is issued from its own alarm device 33.

  As described above, according to this embodiment, it is possible to dynamically recognize a frame pattern of another system and obtain it as a pattern addressed to another machine, and further compare the patterns addressed to the other machine, thereby achieving the intended purpose. Is achieved.

  In addition, communication may be performed between specific devices in the same wireless house alarm system other than other systems. For example, by applying the present invention to device registration communication, device registration communication that is not addressed to the own device can be acquired as a pattern addressed to another device, and the intended purpose is achieved by comparing the patterns addressed to other devices. The

  In the second embodiment, the description has been given of the example in which the wireless home alarm system is composed of one transmitter and a plurality of receivers. However, it goes without saying that the present invention can also be implemented in a wireless home alarm system comprising one transmitter and one receiver, and a plurality of transmitters and a plurality of receivers.

  In addition to a wireless home alarm system, an automatic metering system for electricity, gas, water, etc. composed of one transmitter and one receiver, composed of one transmitter and one receiver Even a keyless entry system for a car to be used can be realized in the same manner.

  Of course, with regard to an automatic meter reading system such as electricity, gas or water, which is composed of one transmitter and one receiver, one transmitter, a plurality of receivers, a plurality of transmitters, Needless to say, the present invention can also be implemented with an automatic meter reading system such as electricity, gas, or water supply, which includes one receiver, a plurality of transmitters, and a plurality of receivers.

  The radio reception activation control device according to the present invention is particularly useful for a battery-driven radio communication device because it can reduce power consumption. Moreover, it is useful for a system in which power saving is indispensable, for example, a wireless home alarm system.

E10 Pattern judgment means addressed to other machine E11 Pattern extraction means addressed to other machine E12 Pattern setting means addressed to other machine E20 Wireless power supply control means 21 Frame synchronization boundary detection means 22 Pattern buffer addressed to other machine 23 Pattern comparison means addressed to other machine 24 Pattern addressed to other machine Determination means 25 Pattern setting means addressed to other equipment 100 Wireless receiver

Claims (10)

A pattern determination unit addressed to another device that checks a message received in wireless communication and determines whether the message includes a pattern addressed to the other device;
A wireless reception activation control device comprising: a wireless power supply control means for performing power saving control of a wireless power supply when a determination result by the pattern determination means addressed to the other apparatus indicates that the other apparatus is addressed. Furthermore, as means for collecting patterns addressed to other devices in the wireless communication status, and setting the collected patterns addressed to other devices in the pattern determination means addressed to the other devices,
A pattern extraction means addressed to another device that checks a message received in wireless communication and extracts a pattern detected in a state in which a pattern addressed to the own device is not detected;
2. The wireless reception activation control device according to claim 1, further comprising: a pattern setting unit addressed to the other device that sets the pattern addressed to the other device extracted by the pattern extraction unit addressed to the other device in the pattern determination unit addressed to the other device.   The pattern extraction means addressed to the other device is configured as a frame synchronization boundary detection means having a function of detecting the boundary between the bit synchronization pattern and the frame pattern in the received data. 3. The wireless reception activation control device according to claim 2, wherein the electronic reception activation control device is configured to send a telegram as a pattern addressed to another device to the pattern setting means addressed to the other device. The pattern setting means addressed to the other device aggregates the patterns addressed to the other device sent from the pattern extraction means (frame synchronization boundary detection means) addressed to the other device, and the pattern addressed to the other device is addressed to the other device for detection to the other device. Configured to be sent to the pattern judging means,
The pattern determination unit addressed to the other device is configured to make a determination addressed to the other device using a pattern addressed to the other device sent from the pattern setting unit E12 addressed to the other device. Wireless reception activation control device.   The radio reception activation control device according to any one of claims 1 to 4, wherein the communication form is a specific low power radio. A pattern determination unit addressed to another device that checks a message received in wireless communication and determines whether the message includes a pattern addressed to the other device;
A microcomputer for a wireless receiver, comprising: a wireless power supply control means for performing power saving control of a wireless power supply when the determination result by the pattern determination means addressed to the other apparatus indicates that the address is directed to another apparatus. It consists of one or more transmitters and one or more receivers,
The transmitter has a sensor function, and is configured to transmit an alarm signal toward the wireless receiver when the sensor function is activated.
The wireless receiver according to any one of claims 1 to 5, further comprising an alarm function, and an alarm function when receiving an alarm signal from the transmitter A wireless residential alarm system that is configured to operate. Consists of one or more transmitters and wireless receivers,
The transmitter has a meter reading function, and is configured to transmit a meter reading information signal to the wireless receiver when the meter reading function is operated.
The wireless receiver according to any one of claims 1 to 5, further comprising a meter reading information collecting function and receiving a meter reading information signal from the transmitter An automatic meter reading system configured to collect meter reading information for each transmitter by operating the meter reading information collecting function. It consists of a transmitter and a wireless receiver,
The transmitter has a function of generating a wireless transmission request by operating an interface, and transmits an unlocking signal or a locking signal to the wireless receiver when the transmission request generating function is activated. Configured,
The wireless receiver according to any one of claims 1 to 5, further having an unlocking and locking function, and an unlocking signal or locking from the transmitter. An entry system configured to activate the unlocking or locking function when a signal is received.   The entry system according to claim 9, wherein the transmitter is attached to an automobile key, and the wireless receiver is attached to an automobile, and controls opening and closing of a door lock of the automobile.

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