JP2000209299A - Communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a receiver which is not a communication opposite party of a transmitter to decrease a time required for discriminating a different identification code in a communication method, where the transmitter repetitively transmits a connection signal including the identification code. SOLUTION: In this communication method, when a connection signal is repeatedly transmitted, an identification code extract means 9 extracts a partial identification code different every time, in response to the number of times of transmission from an identification code of a communication opposite party and inserts the partial identification code, together with the number of times of transmission to a transmission text. At reception, a position specific code detection means 11 discriminates the number of times of transmission from a control code in the received connection signal and outputs it to a partial identification code comparison means 12. The partial identification code comparison means 12 uses the number of times of transmission to compare the partial identification code, in the received connection signal with own identification code.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for transmitting and receiving a data signal by confirming a communication partner by using an identification code when communicating between a transmitting apparatus and a receiving apparatus, and transmitting a connection signal including the identification code to the transmitting apparatus. In the communication method of repeatedly transmitting from the communication device, the time until it is determined that the identification code is different in the receiving device that is not the communication partner is shortened.

For example, when waiting for intermittent reception, the time until it is determined that the identification code is different is shortened to extend the battery life of the receiver, or when communication is performed using one communication channel from a plurality of communication channels. This is to shorten the time until it is determined that the identification codes are different, thereby shortening the communication channel switching cycle in the receiving device.

[0003]

2. Description of the Related Art A communication method for transmitting and receiving a data signal by determining a communication partner by using an identification code when performing communication between a transmission device and a reception device, and repeatedly transmitting a connection signal including the identification code from the transmission device. As a conventional example,
The publication No. 0-198881 will be described.

FIG. 7 shows a communication message format. The communication message is roughly divided into the following three.

[0005] The first is a part which is defined by the standard and must be transmitted. The bit synchronization signal 51 in FIG.
The frame synchronization signal 52 and the radio call name 53 correspond to this (however, this is not related to the present invention).

[0006] The second is a repetitive transmission section of the connection signal according to the present invention, which includes an identification code. The system start signal 54 in FIG. 7 corresponds to this, and the shortened type / call name 57 is a partial identification code in the present invention. In addition to the shortened type / call name, one unit of the short bit synchronization signal 55 and the system identification code 56 corresponds to the connection signal.

The third is a data signal according to the present invention.
The wireless call name is included and the shortened / call name is a part of this) 58, and the control information (data) 59 corresponds to this.

In this Japanese Patent Laid-Open Publication No. Hei 10-198881, the identification code is 12 digits, and the lower 4 digits are included in the connection signal as a partial identification code and transmitted. This solves the following inconvenience that occurs when the identification code is long.
If the identification code is long, the transmission time of one connection signal becomes longer,
The time until it is determined that the identification code is different in the receiving device that is not the communication partner increases. Also, it is desirable to shorten the transmission time by setting the repetitive transmission time of the connection signal to about the time required for the receiving apparatus to receive the signal (intermittent carrier sense interval in this figure). The transmission time becomes longer and may be longer than the intermittent carrier sense interval.

On the other hand, by using a partial identification code for the connection signal, it is possible to reduce the time for determining whether to receive the signal even if the identification code is long, and to prevent the transmission time of the connection signal from being unnecessarily long. .

[0010]

As described above, the transmitting apparatus continuously transmits the connection signal including the partial identification code obtained by extracting a part of the identification code for identifying the communication partner for a time necessary for the receiving apparatus to receive the connection signal for a time longer than necessary. After transmitting the data signal repeatedly, the receiving device received the connection signal from the transmitting device, and confirmed that the partial identification code in the connection signal was a part of the identification code included in the receiving device. Sometimes data signal reception processing is performed.

In the example of Japanese Patent Application Laid-Open No. 10-198881, the lower four digits are first checked with the partial identification code in the connection signal, and if the partial identification code matches, the remaining identification code in the data signal continues. Of the upper 8 digits of is determined to determine the communication partner.

By using the partial identification code for the connection signal, it is possible to shorten the time for determining whether to receive the signal even if the identification code is long, and to prevent the transmission time of the connection signal from being unnecessarily long. However, the effect of the partial identification code may not be able to be exerted under certain conditions.

The lower four digits of the identification code happen to be the same as the identification code of the receiver itself (the identification code provided in the receiving apparatus) and the remaining upper eight digits.
The case where there is a receiving device having a different digit will be described with reference to FIG.
This probability is 1/100 when there are 100 receiving devices having different identification codes in the communication area of each receiving device.

In the communication message format (1) output from the transmission device, the lower four digits of the partial identification code are repeated as shown in (2). The receiving apparatus receives the data signal until the end of the data signal as shown in (3) if it is its own identification code, and receives the data as shown in (4) if it is an identification code similar to its own. Identification code 1 received halfway through the signal
When the two digits are compared, the reception is stopped. That is, if there is a receiving device having an identification code similar to its own identification code, the receiving device cannot identify the two at the time of receiving the connection signal, and will receive the data signal halfway. This is because the following problem becomes more prominent as the repetitive transmission time of the connection signal is longer.

In the case of intermittent reception standby as disclosed in Japanese Patent Laid-Open No. Hei 10-198881, if the received signal is not a communication addressed to itself, reception is interrupted to reduce the current consumption of the receiving circuit. Usually, in order to extend the battery life, the time interval of the intermittent carrier sensing is lengthened, and the repetitive transmission time of the connection signal is lengthened. Therefore, if there is an identification code similar to its own identification code, the receiving apparatus cannot interrupt the reception in the middle of the connection signal and will receive the connection signal having a long transmission time to the end, thereby shortening the battery life.

Another problem arises in a transmission device and a reception device that wait for multi-channel reception. The multi-channel reception standby means that the reception apparatus sequentially switches a plurality of communication channels (N) to search for a connection signal and performs reception standby, and when the identification code in the connection signal does not match its own identification code. The reception is interrupted and the communication channel is switched to search for a connection signal. The communication message format transmitted from the transmitting device is the same as that of FIG.
), Select one communication channel from the
The data signal is transmitted after repeatedly transmitting at least twice.

At this time, if an identification code similar to its own identification code exists, the receiving apparatus cannot interrupt the reception in the middle of the connection signal and receives the connection signal having a long transmission time until the end. As a result, it is delayed to switch the communication channel and search for another connection signal. During this time, if there is a transmission signal from a partner to be communicated with, it cannot be received.

An object of the present invention is to exert the effect of a partial identification code even when an identification code similar to its own identification code exists.

[0019]

According to the present invention, in order to solve the above-mentioned problems, when communication is performed between a transmitting apparatus and a receiving apparatus, the transmitting apparatus extracts a part of an identification code for identifying a communication partner. After continuously and repeatedly transmitting the connection signal including the identification code for a time necessary for the receiving device to receive the data signal including the identification code, the receiving device transmits
When receiving the connection signal from the transmission device and confirming that the partial identification code in the connection signal matches a part of the identification code included in the reception device, the reception device performs a reception process of the data signal, and the transmission device converts the connection signal to Each time it is repeated, the extracted portion of the partial identification code is changed in a predetermined order.

According to the above invention, the extracted portion of the partial identification code changes each time the connection signal is repeated. Therefore, even if an identification code similar to its own identification code is present, the receiving apparatus cannot receive the connection signal while receiving the connection signal repeatedly. Identification can be made and reception can be interrupted.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention can be embodied in the form described in each claim.

That is, as in the first aspect of the present invention,
The transmitting device changes the extraction part of the partial identification code in a predetermined order every time the connection signal is repeated. And
Since the extracted part of the partial identification code changes each time the connection signal is repeated, even if an identification code similar to its own identification code is present, the receiving apparatus can identify during the repeated reception of the connection signal and interrupt the reception. .

Further, as in the second aspect of the present invention, the transmitting device changes the extraction part of the partial identification code in a predetermined order every time communication is performed with the receiving device. Then, the extracted portion of the partial identification code changes each time communication is performed with the receiving device, so that the receiving device can eliminate the delay of interruption of reception of the specific identification code during reception of the connection signal.

According to a third aspect of the present invention, the transmitting apparatus transmits the connection signal including the number of times of transmission of the connection signal and the partial identification code, and the receiving apparatus transmits the number of times of transmission in the connection signal. Is used to confirm that the partial identification code matches a part of the identification code included in the receiving apparatus. Then, the receiving device knows the extraction position of the partial identification code based on the transmission count value, so that the identification code can be reliably compared even if the reception signal is received in the middle of the connection signal.

Further, as in the fourth aspect of the present invention, the transmitting device transmits the connection signal together with the position specifying code indicating the extraction position of the partial identification code, and the receiving device uses the position specifying code in the connection signal. Then, it is confirmed that the partial identification code coincides with a part of the identification code provided in the receiving apparatus.
Then, since the receiving device knows the extraction position of the partial identification code by the position specifying code, the receiving device can surely compare the identification codes even if the transmitting device freely changes the extraction position.

According to a fifth aspect of the present invention, when the transmitting apparatus receives the connection signal from the beginning to the end when changing the extraction part of the partial identification code while repeatedly transmitting the connection signal, the transmitting apparatus transmits at least the entire identification code. It is extracted to include. Since the entire identification code is known during the reception of the connection signal to be repeatedly transmitted, even if an identification code similar to its own identification code exists, the receiving apparatus can reliably identify the reception while repeatedly receiving the connection signal. Can be interrupted.

According to a sixth aspect of the present invention, the transmitting apparatus repeatedly transmits the connection signal and shifts the extracted part of the partial identification code from the upper part to the lower part or from the lower part to the upper part of the identification code. Things that move. Since the extracted part of the partial identification code is moved from the upper part to the lower part or from the lower part to the upper part of the identification code, even if an identification code similar to its own identification code exists, it can be systematically identified. it can. For example, if the upper part of the identification code is the system classification and the lower part is the terminal classification, it is effective to move from the upper part to the lower part when a large number of systems coexist. Moving from the lower part to the upper part is effective for quickly interrupting reception.

Further, as in the invention according to claim 7, the transmitting device randomly changes the extraction part of the partial identification code while repeatedly transmitting the connection signal. Then, since the extraction part of the partial identification code is changed at random, the receiving apparatus can prevent the interruption of the reception of the specific identification code from being always delayed during the reception of the connection signal.

Then, the receiving apparatus performs intermittent reception standby, and searches for a connection signal when the partial identification code in the connection signal does not coincide with a part of the identification code provided in the reception apparatus. Is to interrupt. Even if the partial identification code in the connection signal is similar to a part of its own identification code, the time for judging that they do not match is not increased, and the power consumption during intermittent reception standby is reduced, and the battery life can be extended. .

Further, as in the ninth aspect of the present invention, the receiving apparatus performs multi-channel reception standby, and interrupts reception when the partial identification code in the connection signal does not match a part of the identification code provided in the receiving apparatus. The communication channel is switched to search for a connection signal. Even if the partial identification code in the connection signal is similar to a part of its own identification code, the time to judge that they do not match is not long, and the communication channel switching cycle is fast, so that the reception of the transmission signal from the communication partner is possible. Can be ensured.

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a radio transmitting / receiving apparatus according to Embodiment 1 of the present invention. Receiving means 3 for receiving a wireless signal 2 from the other party's wireless transmitting and receiving device via the antenna 1 and demodulating it into a received message such as a connection signal and a data signal to communicate with the other party's wireless transmitting and receiving device
A receiving circuit control means 4 for controlling the power on / off of the receiving means 3 and a receiving frequency, a transmitting means 5 for modulating a transmission message and transmitting a radio signal 2 to a partner radio transmitting / receiving apparatus via the antenna 1; A transmission circuit control unit 6 for controlling the power on / off of the transmission unit 5 and a transmission frequency, etc., decodes a received message from the receiving unit 3 to perform reception processing, and controls the entire communication such as passing the transmitted message to the transmitting unit 5. For example, it comprises a communication control means 7 composed of a microcomputer.

Further, a unique identification code is used for each wireless transmission / reception device for identifying a communication partner, and the identification code of the wireless transmission / reception device itself and the identification code of the communication partner are stored in the identification code storage means 8 at the time of initial setting. I do. The identification code is read out from the identification code storage means 8, and at the time of transmission, the identification code of the communication partner is inserted into the transmission message as a code for identifying the recipient. At the time of reception, only the message in which the recipient identification code in the received message matches its own identification code is decoded. If necessary, further insert its own identification code in the transmission message as a code to identify the sender, and confirm that the sender identification code in the reception message matches its own identification code. You may.

In FIG. 1, the identification code extracting means 9 extracts the identification code of the communication partner to be inserted into the transmission message, and the identification code comparison means 10 compares the receiver identification code in the reception message with its own identification code. And make sure it is inserted.

FIG. 2 shows a message format communicated between the wireless transmitting / receiving apparatuses shown in FIG. The communication message is roughly divided into the following two.

The first is a connection signal repetition transmission section. One connection signal is composed of a bit synchronization signal 20, a frame synchronization signal 21, a control code 22, and a partial identification code 23. The receiver receives the bit synchronization signal 20, synchronizes with the sender, receives the frame synchronization signal 21, and knows the beginning of the control code 22. The control code 22 includes a connection signal transmission count value 30. The partial identification code 23 is a 4-digit value of the 12-digit identification code of the receiver.

The second is a data signal, and the control code 2
4, an identification code 25 and transmission information 26. Upon receiving the identification signal 25, the communication partner is confirmed, and the transmission information 26 is received. The control code 24 includes information indicating that the control code itself is a part of the data signal. The identification code 25 is all 12 digits of the identification code of the receiver. The transmission information 26 is information to be transmitted from the sender to the receiver.

In this embodiment, the extracted portion of the partial identification code 23 is changed every time the connection signal is repeated as shown in (1) and (2) in FIG. In the method 1 of (1), the upper four digits of the identification code 24 are used for the first connection signal, and the middle four digits are used for the second connection signal.
Include the lower 4 digits for the first time. From the fourth time again, the top four
Digit, middle 4 digits, lower 4 digits. The receiver knows in advance that this order is to be included, that is, the first four digits of the connection signal include the upper four digits of the identification code 24, the second includes the middle four digits, and the third includes the lower four digits. The extraction position of the received partial identification code 23 can be known from the transmission count value 30 of (1). Therefore, even if an identification code similar to its own identification code exists, the receiver can identify the connection signal while repeatedly receiving the connection signal, and can interrupt the reception.

This will be described with reference to FIG. In the communication message format (1) output from the sender, the partial identification code is repeated in the lower four digits 27, the middle four digits 28, and the upper four digits 29 as in (2). If the receiving apparatus receives the identification code, it receives the data signal until the end as shown in (3). When a connection signal is received twice as in (4) when the lower 4 digits of the identification code happen to be the same as the identification code of the receiver (identification code provided to the receiver) and the remaining upper 8 digits are different. Can be interrupted. Conventionally, as shown in FIG. 8, if there is a receiving device having an identification code similar to its own identification code, the receiving device cannot identify the two by only the connection signal and receives the data signal halfway.

In FIG. 2, since the transmission count value is included in the control code and transmitted, the identification code can be reliably compared even if the connection signal is received from the middle. If there is no transmission count value, it is an absolute condition that the connection signal is received from the beginning. Note that the same effect can be obtained if a unique value is used for each of the connection signals to be repeatedly transmitted instead of the transmission count value.

When the sender receives the connection signal from the beginning to the end when changing the extraction portion of the partial identification code while repeatedly transmitting the connection signal, the sender extracts the connection signal so as to include at least the entire identification code. In FIG. 2, if the connection signal is received at most three times, the identification code of 12 digits can be known. Therefore,
Since the receiver knows the entire identification code while receiving the connection signal to be repeatedly transmitted, even if an identification code similar to its own identification code exists, the receiving apparatus receives the connection signal three times during the repeated reception of the connection signal. If so, the identification can be made surely and the reception can be interrupted.

In the method 2 of (2) in FIG. 2, the lower four digits of the identification code 25 are set in the first connection signal, the middle four digits are set in the second connection signal,
Include the upper 4 digits for the third time. Recipients are required to connect 1
Extraction of the partial identification code 23 which is known to include the lower 4 digits of the identification code 25 at the second time, the middle 4 digits at the second time, and the upper 4 digits at the third time, and is received by the transmission count value in the control code 22 Know the position. Therefore, even if an identification code similar to its own identification code exists, the receiver can identify the connection signal while repeatedly receiving the connection signal, and can interrupt the reception.

As described above, the transmitting apparatus moves the extracted part of the partial identification code from the upper part to the lower part or from the lower part to the upper part of the identification code while repeatedly transmitting the connection signal. Thus, even if there is an identification code similar to its own identification code, it can be systematically identified. For example, it is assumed that the upper four digits of the identification code indicate the system classification and the lower eight digits indicate the terminal classification. When a large number of systems are mixed, it is effective to move from the upper part to the lower part as in method 1 of (1), identify the system, and then identify the terminal. When a large number of terminals are mixed (2)
It is effective to move from the lower part to the upper part, identify the terminal, and then identify the system as in Method 2 of the above.

When a plurality of systems and a plurality of terminals coexist, the method 1 of (1) and the method 2 of (2) are combined. The first to third connection signals are the method 1 of (1), and the fourth to sixth connection signals are the method 2 of (2).

Alternatively, if it is complicated to switch every three connection signals, the extraction part of the partial identification code is changed in a predetermined order every time a data signal is transmitted. For example, the current transmission is transmitted by the method 1 of (1), and the next transmission is transmitted by the method 2 of (2). As a result, the change pattern of the extracted portion of the partial identification code changes every time communication is performed, so that the receiver can avoid the interruption of the reception of the specific identification code being always delayed during the reception of the connection signal.

Thus, when there is an identification code whose lower four digits are different among the 12 identification codes, the method 1 of (1) cannot judge until the connection signal is received three times, but the method 2 of (2) does not determine the connection signal. Is received once. Since the method 1 of (1) and the method 2 of (2) are switched every three connection signals or every transmission, it can be estimated that the connection signal can be received twice and determined on average.

The above partial identification code control is performed by the communication control means 7, the identification code extraction means 9, the position identification code detection means 1 in FIG.
1. Performed by the partial identification code comparison means 12. At the time of transmission, the identification code extracting means 9 extracts a partial identification code from the identification code of the communication partner and inserts it into the transmission message. The transmission count value is counted by the communication control means 7 and included in the transmission message together with the partial identification code. On the other hand, at the time of reception, the position identification code detection unit 11 determines the number of transmission times from the control code in the received connection signal and outputs the value to the partial identification code comparison unit 12. Using this transmission count value, the partial identification code comparison means 12 compares the partial identification code in the received connection signal with its own identification code.

(Embodiment 2) The above method requires that both the sender and the receiver know in advance the extraction position of the partial identification code. Therefore, the extraction position is not suitable for a complicated change pattern. Next, a method will be described in which the receiver can reliably determine the identification code even if the sender freely changes the extraction position.

FIG. 4 shows a message format transmitted between the radio transmitting / receiving apparatuses. As in FIG. 2, the communication message is roughly divided into two parts. The position identification code 31 is included in the control code 22 in the connection signal.

The position identification code 31 indicates the extraction position of the partial identification code, and indicates which part of the four digits of the partial identification code is the twelve digits of the identification code. Method 1 of (1) in FIG.
In method 3 of (3), the number of the first digit of the partial identification code corresponding to the number of the identification code is determined as the position identification code. Since the receiver knows the extraction position of the partial identification code by the position specifying code 31, even if the sender changes the extraction position freely, the receiver can surely compare the identification codes.

In FIG. 4, the method 1 of (1) and the method 2 of (2)
In addition to being able to perform the same operations as in the first embodiment, the partial identification code can be changed randomly as in the method 3 of (3). When a large number of systems and terminals are mixed, there is a method of combining the method 1 of (1) and the method 2 of (2), but the same effect can be expected by the method 3 of (3).
Since the extraction part of the partial identification code is changed at random, the receiver can prevent the interruption of the reception of the specific identification code from being always delayed during the reception of the connection signal. Since a random number is generated, it is not necessary to program a change procedure for changing the partial identification code from the upper part to the lower part.

Also, as in method 4 of (4) in FIG. 4, the definition of the position identification code 31 is defined as “ID1” = upper 4 digits as shown in Table 1.
Similar effects can be obtained by defining “ID2” = middle 4 digits, “ID3” = lower 4 digits, and the like.

[0053]

[Table 1]

(Embodiment 3) Next, a communication method in intermittent reception standby will be described with reference to FIG.

The receiver performs an intermittent reception standby for intermittently searching for and receiving a connection signal intermittently every predetermined time T1, and when a partial identification code in the connection signal does not match a part of the identification code of the receiver. Then, the search for the connection signal is interrupted until after the next T1, and the sender repeatedly transmits the connection signal for the time T1 or more, and then transmits the data signal.

(1) shows the operation of the sender A, (2)
The operation of the receiver B to communicate with the sender A in (3)
(4) and (5) show the operation of the sender A and the receiver C who does not need to communicate.

As shown in (1), the transmitter A transmits a transmission signal composed of a connection signal repeater and a data signal.

The receivers B and C turn on the power supply of the receiving circuit at every reception waiting period T1 of (2) and (5) and wait for reception of the connection signal for the time T2. If there is no signal addressed to itself, the power supply of the receiving circuit is turned off until the next standby cycle to operate to reduce the current consumption of the receiving circuit. Therefore, in order to extend the battery life, the intermittent cycle T1 is increased and T2 is increased.
Shorten. The repetition transmission time of the connection signal is set longer than T1.

The receiver B receives the connection signal as shown in (3), receives the connection signal until the end of the data signal while confirming the matching of the identification code (reception is completed), and turns off the power of the receiving circuit.

In the present invention, the extracted portion of the partial identification code is changed each time the connection signal is repeated. Therefore, the receiver C judges the mismatch of the identification code during the reception of the connection signal several times as shown in (5a) and receives the connection signal. Power off the circuit (reception interrupted). Conventionally, if an identification code similar to its own identification code exists (5)
As shown in b), the discrepancy of the identification code could not be determined up to the middle of the data signal, and the timing of turning off the power of the receiving circuit was late.

As described above, according to the present invention, even if the partial identification code in the connection signal and a part of its own identification code are similar, the time for judging that they do not match is not long, and the power consumption during standby for intermittent reception is low. Battery life.

(Embodiment 4) Next, a communication method in multi-channel reception standby will be described with reference to FIG.

The receiver performs a multi-channel reception standby for sequentially switching a plurality of (N) communication channels to search for and receive a connection signal, and performs a partial identification code in the connection signal and a part of the identification code of the receiver. When the numbers do not match, the reception is interrupted, the communication channel is switched, and a search for a connection signal is performed.
One communication channel is selected and a connection signal is repeatedly transmitted N times or more, and then a data signal is transmitted.

(1) and (2) show the operations of the senders A and B,
(3) shows the operation of the receiver C to communicate with the sender B.

Transmitters A and B transmit transmission signals almost simultaneously. Here, sender A transmits on one channel and sender B transmits on two channels.

The receiver C waits for reception of a connection signal alternately between channel 1 and channel 2. If there is no signal addressed to itself, reception is interrupted and the communication channel is switched to search for another connection signal.

Here, the receiver C first receives the connection signal from the sender A on one channel as shown in (3). In the present invention, the extracted portion of the partial identification code is changed every time the connection signal is repeated. Therefore, the identification frequency mismatch is determined during the reception of the connection signal several times, and the reception frequency is switched to two channels (reception interruption). Then, the connection signal from the sender B is received, and reception (completion of reception) can be performed until the end of the data signal while confirming the matching of the identification code.

Conventionally, if there is an identification code similar to the identification code of itself, the transmission signal from the sender A cannot be judged to the middle of the data signal as in (4), and the reception frequency cannot be determined. The connection signal from the sender B could not be received because the switching timing was late.

As described above, in this embodiment, even if the partial identification code in the connection signal and a part of its own identification code are similar, the time for judging that they do not match is not long, and the cycle for switching communication channels is short. As a result, it is possible to reliably receive the transmission signal from the communication partner.

When the receiver performs the multi-channel reception standby while switching the N channels, the connection signal is repeated N times or more in order to surely receive in one transmission.

Although the embodiment has been described with the receiver identification code specifying the receiver as the identification code, a partial identification code may be used as the sender identification code specifying the sender. Alternatively, a common identification code may be used for the sender and the receiver. Also, the identification code has been described as having 12 digits and the partial identification code has been described as having 4 digits, but the present invention is not limited to this. The effect is greater as the number of digits of the identification code is larger and as the number of digits of the partial identification code is smaller.

[0072]

As is apparent from the above description, according to the communication method of the present invention, it is possible to shorten the time required to determine that the identification code is different in the receiving device that is not the communication partner.

In particular, when waiting for intermittent reception, the time required to determine that the identification code is different is shortened to extend the battery life of the receiving apparatus, or when communication is performed using a single communication channel from a plurality of communication channels. By shortening the time required to determine that the identification code is different, the cycle of communication channel switching in the receiving device can be shortened.

Conventionally, it takes a long time to determine that the receiving device that is not the communication partner uses a different identification code with an identification code similar to its own, but the effect of the partial identification code can be exerted even in this case. Can be done.

Further, the following effects can be obtained according to each claim.

(1) Since the extracted part of the partial identification code changes each time the connection signal is repeated, even if an identification code similar to its own identification code exists, the receiving apparatus can identify the received signal while repeatedly receiving the connection signal. Can be interrupted.

(2) Since the extracted portion of the partial identification code changes every time communication is performed, the receiving apparatus can eliminate the delay of interruption of reception of a specific identification code during reception of a connection signal.

(3) The receiving device can determine the extraction position of the partial identification code from the number of times of transmission, so that the identification code can be reliably compared even if the reception signal is received in the middle of the connection signal.

(4) Since the receiving device knows the extraction position of the partial identification code by the position specifying code, the receiving device can surely compare the identification codes even if the transmitting device changes the extraction position freely.

(5) Since the entire identification code is known during the reception of the connection signal to be repeatedly transmitted, even if an identification code similar to its own identification code exists, the receiving apparatus can surely receive the connection signal during the repeated reception of the connection signal. Identification can be made and reception can be interrupted.

(6) Since the extracted part of the partial identification code is moved from the upper part to the lower part or from the lower part to the upper part of the identification code, even if an identification code similar to its own identification code exists, it is systematically obtained. Can be identified. For example, if the upper part of the identification code is a system classification and the lower part is a terminal classification, it is effective to move from the upper part to the lower part when a large number of systems are mixed. Is effective to move from the lower part to the upper part.

(7) Since the extracted part of the partial identification code is changed at random, the receiving apparatus can avoid the interruption of the reception of the specific identification code being always delayed during the reception of the connection signal.

(8) Even if the partial identification code in the connection signal is similar to a part of its own identification code in the intermittent reception standby mode, the time for judging that they do not match does not become long, and the power consumption in the intermittent reception standby mode decreases. Battery life can be extended.

(9) Even when the partial identification code in the connection signal is similar to a part of its own identification code in standby for multi-channel reception, the time for judging that they do not match does not become long, and the cycle for switching communication channels is shortened. Thus, it is possible to reliably receive the transmission signal from the communication partner.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless transmission / reception device in a communication method according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a communication message format in the device.

FIG. 3 is a view for explaining operations of a sender and a receiver in the same device.

FIG. 4 is a diagram showing a communication message format in the communication method according to the second embodiment of the present invention.

FIG. 5 is a diagram illustrating operations of a sender and a receiver in a communication method according to a third embodiment of the present invention.

FIG. 6 is a diagram illustrating operations of a sender and a receiver in a communication method according to a fourth embodiment of the present invention.

FIG. 7 is a diagram showing a communication message format in a conventional communication method.

FIG. 8 is a diagram for explaining the operation of a sender and a receiver in the same method.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 wireless antenna 2 wireless signal 3 receiving means 4 receiving circuit control means 5 transmitting means 6 transmitting circuit control means 7 communication control means 8 identification code storage means 9 identification code extraction means 10 identification code comparison means 11 position identification code detection means 12 partial identification Sign comparison means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K033 AA02 CB01 DA17 5K034 AA02 CC06 DD02 EE03 HH01 HH02 HH07 HH12 HH13 HH65 LL01 MM18

Claims (9)

[Claims] 1. A communication method for performing communication between a transmitting apparatus and a receiving apparatus, wherein the transmitting apparatus receives a connection signal including a partial identification code obtained by extracting a part of an identification code for identifying a communication partner. After continuously and repeatedly transmitting the data signal including the identification code after the necessary time, the receiving device receives the connection signal from the transmission device, receives the partial identification code in the connection signal and receives the connection signal. When it is confirmed that a part of the identification code included in the device matches, the receiving device performs a data signal reception process, and the transmitting device changes the extraction part of the partial identification code in a predetermined order every time the connection signal is repeated. A communication method characterized in that: 2. The communication method according to claim 1, wherein the transmitting device changes the extraction part of the partial identification code in a predetermined order each time communication is performed with the receiving device. 3. A transmitting apparatus transmits a connection signal to be repeatedly transmitted, including a transmission count value of the connection signal and a partial identification code, and the receiving apparatus uses the transmission count value in the received connection signal. The communication method according to claim 1, further comprising: confirming that the partial identification code matches a part of the identification code included in the receiving device. 4. A transmitting apparatus transmits a connection signal including a partial identification code and a position specifying code indicating an extraction position thereof, and the receiving apparatus transmits the connection signal using the position specifying code in the received connection signal. 3. Confirm that the partial identification code matches a part of the identification code of the receiving device. 4.
The communication method described. 5. The transmitting apparatus according to claim 1, wherein, when changing the extraction portion of the partial identification code while repeatedly transmitting the connection signal, when the connection signal is received from the beginning to the end, the transmission device extracts the entire identification code at least. Claim 3 characterized in that:
Or the communication method according to 4. 6. The transmitting device according to claim 1, wherein the transmitting unit moves the extracted part of the partial identification code from the upper part to the lower part or from the lower part to the upper part of the identification code while repeatedly transmitting the connection signal. The communication method according to 3, 4, or 5. 7. The communication method according to claim 4, wherein the transmitting device randomly changes the extracted portion of the partial identification code while repeatedly transmitting the connection signal. 8. A receiving apparatus performs an intermittent reception standby for intermittently searching for and receiving a connection signal every predetermined time T1.
When the partial identification code in the connection signal and a part of the identification code provided in the reception device do not match, the search for the connection signal is suspended until after the next T1, and the transmission device sets the connection signal to the predetermined time T1 or more. 3. The communication method according to claim 1, wherein the data signal is transmitted after repeatedly transmitting. 9. A receiving apparatus performs multi-channel reception standby for sequentially switching a plurality of (N) communication channels to search for and receive a connection signal, and performs a partial identification code in the connection signal and an identification provided in the receiving apparatus. When a part of the code does not match, the reception is interrupted, the communication channel is switched to search for a connection signal, and the transmitting apparatus selects one communication channel from a plurality of (N) communication channels and transmits the connection signal. 3. The communication method according to claim 1, wherein the data signal is transmitted after repeatedly transmitting the data N times or more.