JP2000069028A - Wireless card, reader / writer, host device, wireless card system, information storage medium having wireless communication function, transmitting / receiving circuit, and wireless communication system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To efficiently detect a plurality of wireless cards and improve the processing time efficiency [Solution] A polling command with an ID for which the number of automatic tries (one time) is specified from an upper device 1 is provided. When issued, the reader / writer 3 first issues a polling command with ID (ID number = 00h), receives a response from the wireless card in the communicable area, and automatically performs another This time, the polling command with the received ID (IDm1) is issued. Since the wireless card (IDm1) 5 is the ID (IDm1) specified by the polling command, no response is received, and the response from the other wireless card 5 is received. The IDs (IDm1, IDm) of the received wireless cards 5,.
m2, IDm3) is returned to the host device 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a wireless communication function between a wireless card, a reader / writer, a higher-level device, a wireless card system, and a wireless card for performing wireless communication between a reader / writer and a wireless card connected to a higher-level device. The present invention relates to an information storage medium, a transmission / reception circuit, and a wireless communication system.

[0002]

2. Description of the Related Art In a conventional wireless card system comprising a reader / writer and a wireless card connected to a host device, there is no wireless card responding to a polling command from the reader / writer, and the polling command is issued repeatedly. A case where a response is generated and one wireless card enters the communicable area and a response is returned will be described with reference to FIG.

A wireless card which has entered a communicable area and has received a polling command from a reader / writer determines a slot number to respond to at random according to the time slot designation value of the command (the number of time slots is one). In all cases, slot # 0, when the number of time slots is 2, either slot # 0 or slot 1. When the number of time slots is 4, slot # 0
Any one of slot # 3. If the number of time slots is 8, one of slot # 0 to slot # 7
One. ).

When the reader / writer detects a response from the wireless card, the reader / writer returns a response to the higher-level device after waiting for a response of the slot with the maximum number (in FIG. 16, the number of time slots is 4, so slot # 3). I do.

FIG. 17 shows a case where there are two wireless cards in the communicable area of the reader / writer. Each wireless card receives a polling command from the reader / writer and randomly determines a slot number to respond to. In this case, the two wireless cards may select different slots, or may select the same slot. When the same slot is selected, the response from the wireless card is output at substantially the same timing, and the reader / writer cannot normally receive the response. In this case, since the reader / writer could not obtain any valid response, it retransmits the polling command to the wireless card.

When the responses from the two wireless cards are in different slots, both readers / writers can receive the responses normally. At this time, the response returned by the reader / writer to the higher-level device includes information on two wireless cards.

FIG. 18 shows a case where three wireless cards exist in the communicable area of the reader / writer, one wireless card selects slot # 0, and two wireless cards select slot # 2. . In slot # 2, the responses from the two wireless cards collide, and the reader / writer cannot receive data normally.

However, the reader / writer operates in slot # 0
Received the response of one wireless card normally,
Returns a response to the host device. As described above, between the reader / writer and the wireless card, the reader / writer transmits a polling command at regular intervals until a response from the wireless card is issued in response to a polling command from the host device.

The wireless card that has received the polling command determines this and returns a response. At this time, in response to the presence of responses from a plurality of wireless cards, the response timing is determined using the slot aloha method. Produces
There are cases of collision.

[0010] On the other hand, when the reader / writer receives the response from the wireless card, it identifies the ID of the wireless card. In order to confirm the presence or absence of the conflicting communication, the polling command is transmitted again by the polling command of the higher-level device. At this time, it is not necessary to re-receive the response from the wireless card which has already been identified by the polling. However, there is a case where a response from the identified wireless card collides with a response from another wireless card, and the identification efficiency is not good.

[0011] Further, between the host device and the reader / writer, the reader / writer performs its operation by a command sent from the host device. As described above, when the reader / writer that has received the polling command from the higher-level device issues a polling command to the wireless card and obtains a response from the wireless card, the reader / writer immediately sends the wireless card ID to the higher-level device. I do. After that, it waits for a polling command from the host device. The higher-level device receives the card ID detected by the reader / writer, and sends a polling command to the reader / writer again to determine whether there is another wireless card. The reader / writer that has received the polling command transmits the polling command to the wireless card at regular intervals. The wireless card that has received the polling command returns a response as described above, and the reader / writer that has received the response transmits the wireless card ID to the host device. Since transmission / reception and determination are performed in this manner, it takes time and processing efficiency is low.

[0012]

As described above, in a wireless card system including a reader / writer and a wireless card connected to a higher-level device, the reader / writer has a response from a plurality of wireless cards. In response to this, the return timing is generated using the slot aloha method, but there are cases in which there is a collision, and in order to confirm the presence or absence of the colliding communication, a polling command is issued again by the polling command from the higher-level device. Submit,
At this time, there is no need to re-receive the response from the wireless card that has already been identified by this polling, and a timing occurs at which the response from the identified wireless card collides with the response from another wireless card. There is a problem that the identification efficiency is not good.

Accordingly, the present invention provides a wireless card capable of efficiently detecting a plurality of wireless cards, a reader / writer, a host device, a wireless card system, an information storage medium having a wireless communication function, a transmitting / receiving circuit, and a wireless communication system. The purpose is to provide.

The reader / writer operates between the host device and the reader / writer according to a command sent from the host device. When a polling command is received from the host device, the reader / writer sends a command to the wireless card. When a polling command is generated and a response is obtained from the wireless card, the ID of the wireless card is immediately transmitted to the higher-level device. Thereafter, a polling command is transmitted again from the higher-level device to determine the presence or absence of another wireless card. A polling command is transmitted to the wireless card at regular intervals. When a response is returned from the wireless card, the polling command is received and transmitted and transmitted, and the ID of the wireless card is transmitted to the host device. And the processing efficiency was low.

Therefore, the present invention provides a wireless card, a reader / writer, a host device, a wireless card system, an information storage medium having a wireless communication function, a transmission / reception circuit, and a wireless communication system capable of improving processing time efficiency. The purpose is to do.

[0016]

The host device of the present invention comprises:
In a higher-level device connected to an information storage medium having a wireless communication function and a transmission / reception circuit performing wireless communication, the upper-level device is connected to the transmission / reception circuit in response to a response request to the information storage medium having a wireless communication function to the transmission / reception circuit. When the identification information of the information storage medium to which a response has been received is received via the transmission / reception circuit, the response to the information storage medium in which only the information storage medium having the identification information received by adding the identification information makes no response. It comprises control means for controlling transmission of the request to the transmission / reception circuit.

According to another aspect of the present invention, there is provided a transmitting / receiving circuit connected to a higher-level device for performing wireless communication with an information storage medium having a wireless communication function, wherein identification information of the information storage medium having a wireless communication function is added from the higher-level device. When the received response request is received, a response request to make only the information storage medium having the identification information no response is transmitted to the information storage medium, and when the response from the information storage medium is received, the response is received. It comprises control means for controlling the transmission of the identification information of the information storage medium to the host device.

An information storage medium having a wireless communication function according to the present invention is an information storage medium having a wireless communication function of performing wireless communication with a transmission / reception circuit connected to a higher-level device, wherein the unique identification information is stored in advance. Means, a receiving means for receiving a response request from the transmitting / receiving circuit, and a non-response when the identification information added to the response request received by the receiving means matches the identification information stored in the storage means. And control means for performing control.

A wireless communication system according to the present invention is a wireless communication system for performing wireless communication between a transmission / reception circuit connected to a higher-level device and an information storage medium having a wireless communication function. First control means for controlling transmission of a response request with the information storage medium having a wireless communication function to the transmission / reception circuit by adding identification information of the information storage medium having the transmission / reception circuit; When a response request to which identification information of an information storage medium having a wireless communication function is added is received from the first control means, the response request for making no response only to the information storage medium having the added identification information is sent to the wireless communication function. And transmitting the identification information of the information storage medium having received the response to the higher-level device when the response from the information storage medium is received. An information storage medium having second control means for performing control and having the wireless communication function receives a response request from the second control means and a storage means in which unique identification information is stored in advance. A receiving unit; and a third control unit that performs a control to make no response when the identification information added to the response request received by the receiving unit matches the identification information stored in the storage unit. ing.

A wireless communication system according to the present invention is a wireless communication system for performing wireless communication between a transmission / reception circuit connected to a higher-level device and an information storage medium having a wireless communication function. Having first control means for controlling the transmission of a response request with an information storage medium having a wireless communication function to the transmission / reception circuit by adding the number of response requests to the information storage medium having: Transmitting a response request to the information storage medium having the wireless communication function based on the response request to which the number of response requests to the information storage medium having the wireless communication function transmitted from the first control means is added; When a response to the request from the information storage medium is received, the next response request to which the identification information of the information storage medium that received the response is added has the above wireless communication function. When a response request transmitted to the information storage medium and further added with identification information of the information storage medium received for each response request is transmitted to the information storage medium having the wireless communication function, and the number of added response requests is completed. ,
An information storage device having second control means for performing control for transmitting all identification information of the information storage medium responded from the information storage medium having the wireless communication function to the upper device in a lump, and having the wireless communication function The medium has storage means for storing unique identification information in advance, receiving means for receiving a response request from the second control means, and identification information added to the response request received by the receiving means. And a third control unit for performing control to make no response when the identification information matches the identification information stored in the storage unit.

The host device of the present invention is a host device connected to a reader / writer that performs wireless communication with a wireless card, and receives a response from the reader / writer in response to a response request to the reader / writer with the wireless card. And control means for controlling the transmission of a response request to the reader / writer to the wireless card which, when receiving the identification information of the wireless card, adds the identification information and makes only the wireless card of the identification information unresponsive. Have been.

The reader / writer of the present invention is connected to a higher-level device and performs a wireless communication with a wireless card. When the reader / writer receives a response request to which the identification information of the wireless card is added from the higher-level device, A control means for transmitting a response request to make only the wireless card of the identification information unresponsive to the wireless card, and when receiving a response from the wireless card, controlling to transmit the identification information of the wireless card to the upper device. Have been.

[0023] The wireless card of the present invention is a wireless card for performing wireless communication with a reader / writer connected to a higher-level device, wherein a storage means for storing unique identification information in advance;
Receiving means for receiving a response request from the reader / writer, and control for not responding when the identification information added to the response request received by the receiving means matches the identification information stored in the storage means And control means for performing the following.

According to a wireless card system of the present invention, in a wireless card system for performing wireless communication between a wireless card and a reader / writer connected to a higher-level device, the higher-level device adds identification information of the wireless card. A first control unit that controls transmission of a response request with the wireless card to the reader / writer, wherein the reader / writer is configured to control the first
When a response request to which the identification information of the wireless card is added is received from the control means, a response request to make no response only to the wireless card with the added identification information is transmitted to the wireless card, and the response from the wireless card is received. A second control unit configured to control transmission of the identification information of the wireless card to the higher-level device when the wireless card is received, wherein the wireless card has a storage unit in which unique identification information is stored in advance; Receiving means for receiving a response request from the second control means, and control for not responding when the identification information added to the response request received by the receiving means matches the identification information stored in the storage means. And a third control means for performing the following.

According to a wireless card system of the present invention, in a wireless card system for performing wireless communication between a reader / writer connected to a higher-level device and a wireless card, the higher-level device adds the number of response requests to the wireless card. Control means for controlling transmission of a response request with the wireless card to the reader / writer, wherein the reader / writer performs the number of response requests to the wireless card transmitted from the first control means. A response request is transmitted to the wireless card based on the response request to which the wireless card is added, and when a response to the response request is received from the wireless card, the next response request to which the identification information of the wireless card is added is transmitted to the wireless card. A response request to which the identification information of the wireless card to be transmitted to the card and received for each response request is further added is transmitted to the wireless card, and the added response is transmitted to the wireless card. When the number of requests has been completed, the wireless card has second control means for performing control to transmit all identification information of the wireless card responded from the wireless card to the higher-level device at a time. Storage means for storing information in advance, receiving means for receiving a response request from the second control means, and identification information added to the response request received by the receiving means being stored in the storage means. And a third control unit that performs control to make no response when the identification information matches the identification information.

[0026]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a wireless card system according to the present invention. That is, the wireless card system performs wireless communication between the reader / writer 3 connected to the host device 1 and the wireless card 5. The host device 1 is configured by a control circuit having a CPU 11. The reader / writer 3 is configured by a transmission / reception circuit having a CPU 31 that performs transmission / reception via an antenna 30.

FIG. 2 shows a schematic configuration of the wireless card 5. The wireless card 1 has a CPU for overall control.
51, a control program for the CPU 51, a memory 52 for storing various information, a transmission / reception switching unit 53, a reception unit 54 for receiving various information from the reader / writer 3, a demodulation unit 55 for demodulating a signal received from the reception unit 54, and transmission. A modulating unit 56 for modulating information; a transmitting unit 57 for converting a signal modulated by the modulating unit 56 into a radio wave and transmitting the radio wave to the reader / writer 3
It is composed of The wireless card 5 is supplied with power by receiving a polling command from the reader / writer 3.

Next, a polling command used between the host device 1 and the reader / writer 3 will be described.
The function of this polling command is a command for detecting that the wireless card 5 has entered the communicable area of the reader / writer 3, and has a form with or without a card ID.

When the ID is provided, the reader / writer 3 reads out the card ID of the wireless card 5 and responds. Also,
When the system code or the application code specified by the command matches the one stored in the memory 52 and the card ID specified by the command does not match the one stored in the memory 52, the wireless card 5 Only return a response. In addition, unlike other commands, even if the polling command can be received from one wireless card, it waits until all the detections are completed, and receives from as many wireless cards as possible.

When there is no ID, the reader / writer 3
Reads out the card ID of the wireless card 3 and responds.
The wireless card 5 returns a response only when the system code or the application code specified by the command matches those stored in the memory 52. In addition, unlike other commands, even if the polling command can be received from one wireless card, it waits until all the detections are completed, and receives from as many wireless cards as possible.

Further, regarding the execution condition and the security condition, it can be confirmed that the transaction ID is valid. Also, if the system code specified in the command is
That is, they match those stored in the reader / writer 3.

FIG. 3 shows a command packet of a polling command, which includes a command code, a system code, the number of time slots, a parameter, the number of card IDs, and a card IDm.

A packet configuration without an ID designation portion of "parameter" and "card ID"("commandcode")
To “the number of time slots”) are also effective. The command code specifies the command code of the polling command.

The system code is a system (application) code for classifying the reader / writer 3 and the wireless card 5. The number of time slots is the number of time slots.

The definition of the parameters is b7:
"1" Automatic try, "0" Immediate response to higher rank, b6: Undefined (fixed to 0), b5: Undefined (fixed to 0), b4: Undefined (fixed to 0), b3: MSB, b2, b1, b0 : LSB
Is the number of automatic tries 1h to Fh (0h is infinite: designation prohibited).
When the number of card IDs is 00h, the polling is executed indefinitely until the wireless card responds.

The number of card IDs is the number of card IDs to be added (between 00h and 02h). Card IDm is the card ID of the wireless card that is not responded by the polling command
(IDm, 0 to 2).

FIG. 4 shows a response packet, including a response code 81h, the number of receptions, ID1 to IDn.
It is composed of The response code specifies the response code of the polling command (fixed at 81h).

The number of receptions is the number of wireless cards detected by the reader / writer 3. ID1 to IDn are card IDs (information of the first to n-th wireless cards 5). Next, the reader /
A polling command used between the writer 3 and the wireless card 5 will be described.

The function of this polling command is to read out the card ID and respond. The wireless card 5 receiving this command changes the response time based on a random number generated inside the wireless card 5 in order to prevent a plurality of wireless cards 5 from responding at the same time. Also, the wireless card 5
Depending on the form of the packet, a response is sent only when the system (or application) code specified in the command matches those stored in the memory 52 and when the above matches and the added card ID does not match. May be done.

As for the execution condition and the security condition, the system (or application) code specified by the command must match those stored in the memory 52. When there is no hatched portion of the command packet shown in FIG. 5, the wireless card 5 operates only when the system (or application) code specified by the command matches those stored in the memory 52.
Returns a response. Further, when there is a hatched portion of the command packet shown in FIG. 5, the wireless card 5 matches the system (or application) code specified by the command with those stored in the memory 52 and specifies the code by the command. If the card ID does not match the one stored in the memory 52, a response is returned.

FIG. 5 shows a command packet of a normal command, which is composed of a command code, a system code, the number of time slots, the number of card IDs (shaded area), and a card ID (IDm; shaded area). I have.

The command code specifies the command code of the polling command. The system code is a system (or application) code for sorting the responding wireless cards 5 (when FFh, all category codes are specified).

The number of time slots is the number of time slots (01h, 02h, 04h, 08h, etc.). The number of card IDs is the number of added card IDs n (00h to 02h).
Be).

The card ID (IDm) is the card ID (IDm) of the wireless card not to be responded by the polling command.
FIG. 6 shows a response packet, which is composed of a response code and a card ID.

The response code specifies the response code of the polling command. Next, a processing procedure in such a case will be described. Procedure 1. Confirm mode 0 (if different,
(No response) Procedure 2. It is confirmed that the system (or application) code specified by the command packet is equal to that of the wireless card 5 or FFh (if different, there is no response). Procedure 3. If the number of card IDs is equal to or less than the number of card IDs in the command packet, go to the next step 4 if the number of card IDs is 00h. If the number of card IDs is 01h, add the card ID and the card of the wireless card 5. It is checked whether the IDs are equal (if they are equal, no card response). If the card ID is 02h, it is checked whether the added card ID and the card ID of the wireless card 5 are equal (if they are equal, no card response). . Step 4. It is confirmed that the number of time slots specified in the command packet is 01h, 02h, 04h, 08h or the like. Procedure 5. A random number in a range according to the number of time slots is generated (a predetermined slot time is weighted for each time slot). Procedure 6. From the memory, the system ID1 block (IDm,
PMs). Step 7. Fixed Response Tim (Fixed Response Tim
e) After waiting, return the response packet in a time slot according to the random number.

The mode transition of the wireless card 5 is as follows. Mode 0 → Success → Mode 0 Mode 1 → No response Mode 2 → No response Mode 3 → No response Next, capture of the wireless card 5 by a polling command and resolution of a collision will be described.

First, time slots (without ID and ID
Will be described. The host device 1 issues a polling command to the reader / writer 3 to capture the wireless card 5. The reader / writer 3 issues a polling command to the wireless card 5.

At the time of polling without ID, the wireless card 5
Is the response of the manufacturer ID (ID) of the wireless card 5 only when the category code and the group code specified by the command match those stored in the memory 52.
m) and the system parameters (PMs) are returned to the reader / writer 3.

At the time of polling with ID, the wireless card 5
Indicates that the category code and group code specified by the command match those stored in the memory 52, and the manufacturer ID (IDm) specified by the command is stored in the memory 5
The card ID (IDm) of the wireless card 5 and the system parameter (PMs) are returned to the reader / writer 3 as a response only when they do not match those stored in the wireless card 5. Polling command with ID, set card ID number to 0
If 0h is specified, the function is equivalent to polling without ID.

A time slot is used to resolve a collision when there is a response from a plurality of wireless cards 5,. Time and date in the parameter section of the polling command
The slot specifies the number of time slots that the wireless card 5 should correspond to. The values that can be specified as the number of time slots are 1, 2, 4, and 8, and the optimum value changes depending on the number of wireless cards handled at the same time. When considering up to three wireless cards, 4 is the optimal value.

The response timing of the wireless card 5 to the polling command is determined by a fixed response waiting time (Fixe
d Response Time) and the variable response wait time (Vari
ableResponse Time). Each waiting time has the following value.

Fixed response wait time = a ms Variable response wait time = b ms Conflict resolution will be described with an example where the number of time slots is four. (1) When there is no wireless card 5 The higher-level device 1 issues a polling command to the reader / writer 3, whereby the reader / writer 3 issues a polling command to the wireless card 5.

If there is no wireless card 5 in the communicable area, no response from the wireless card 5 is returned. The reader / writer 3 cannot receive a response from the wireless card 5 even if it waits for a fixed response time + 4 × variable response time. At this time, the reader / writer 3 repeatedly issues a polling command to the wireless card 5 (infinite repetition). (2) In the case of one wireless card 5 FIG. 7 shows that there is no wireless card 5 responding to the polling command from the reader / writer 3, and the polling command is issued repeatedly, and one of the wireless cards 5 communicates there. Shows the case where a response is returned in the possible area.

The wireless card 5 which has entered the communicable area and has received the polling command from the reader / writer 3 randomly determines a slot number to respond to in accordance with the time slot designation value of the command (the number of time slots is limited). In the case of 1, all slots are # 0, when the number of time slots is 2, either slot # 0 or slot 1. When the number of time slots is 4, slot # 0
~ Any one of slot # 3. 8 time slots
Is any one of slot # 0 to slot # 7
One. ).

When the reader / writer 3 detects a response from the wireless card 5, the slot of the maximum number (FIG. 7)
Since the number of time slots is 4, the response waits until a response in slot # 3) and returns a response to the higher-level device 1. (3) Case of Two Wireless Cards 5 FIG. 8 shows a case where there are two wireless cards 5 in the communicable area of the reader / writer 3. Each wireless card 5 receives a polling command from the reader / writer 3 and randomly determines a slot number to respond to. In this case, the two wireless cards 5 may select different slots, or may select the same slot. When the same slot is selected, the responses from the wireless cards 5 and 5 are output at almost the same timing (collision), and the reader / writer 3 cannot normally receive. In this case, since the reader / writer 3 has not been able to obtain any valid response, the reader / writer 3 retransmits the polling command to the wireless card 5. If the responses from the two wireless cards 5 are in different slots, both reader / writers 3 can normally receive the responses. At this time, the response returned by the reader / writer 3 to the host device 1 includes information on two wireless cards. (4) In the case of three wireless cards 5 FIG. 9 shows a case where three wireless cards 5 exist in the communicable area of the reader / writer 3 and the slot # 0 is selected.
Indicates that one wireless card 5 has selected slot # 2. In slot # 2, the responses from the two wireless cards 5 collide, and the reader / writer 3 cannot normally receive. However, since the reader / writer 3 has normally received the response of one wireless card 5 in slot # 0, it returns a response to the host device 1.

Next, the ID designation (polling with ID) will be described. FIG. 9 shows a case where three wireless cards 5 exist in the communicable area of the reader / writer 3, one wireless card 5 having selected slot # 0 and two wireless cards 5 having selected slot # 2. , The upper-level device 1 receives the response of the card ID m1 responded in the slot # 0.

FIG. 10 is a continuation of FIG.
Issues an ID-attached poll designating the determined card ID m1 in order to confirm whether a plurality of wireless cards 5 are present in the communication area. Reader / writer 3
Issues a polling command to which the specified ID is added. The wireless card 5 receiving this command stores the
The wireless card 5 does not return a response if they match, and if they do not match, the wireless card 5 generates a random number, selects a slot and returns a response.

FIG. 11 shows the wireless cards IDm2 and IDm3.
This is an example in which the random number generated selects the same slot # 1 and collides. Next, the automatic try (polling with ID) will be described.

In the example of FIG. 9, even if three wireless cards 5 are present in the communicable area of the reader / writer 3, only one of them can be recognized. Therefore, as shown in FIG. Need to be issued and repeated. In FIG. 9, if the automatic try function is designated in advance, this processing can be performed by the reader / writer 3 at high speed.

The automatic tribit is “1” from the host device 1
, The reader / writer 3 detects the detected I
Dm is added (up to two), polling is issued a specified number of times, and all the responses of the wireless card 5 obtained as a result are returned to the host device 1.

Automatic tribit from host apparatus 1 is "0"
Is specified, the reader / writer 3
Since the response of one wireless card 5 is received normally at 0, the response of the wireless card 5 is returned to the host device 1 (the same operation as polling without ID).

FIG. 12 shows an example in which one automatic try is specified. When a higher-level device 1 issues a polling command in which the number of IDs is 00h and the automatic tribit is "1", the reader / writer 3 first issues a polling command with an ID (the number of IDs is 00h). After the fixed response time, the variable response time is set four times.
When three wireless cards 5 are in the communicable area, each wireless card 5 randomly determines a slot number to respond to according to the designated value of the time slot (4 as described above). .

The wireless card 5 that has selected slot # 0 is 1
When two wireless cards 5 have selected the slot # 2, the reader / writer 3 receives the wireless card (IDm1) 5 which has selected the slot # 0, and has received the wireless card 5 which has selected the slot # 2. 5 is two, and cannot be received normally due to collision.

Subsequently, since the reader / writer 3 is designated to perform one automatic try, another polling command with ID (this time, since the card IDm1 has been received, the number of IDs is set to 01h, IDm1) ) Is issued, and after the fixed response time, the variable response time is set four times. When the three wireless cards 5 are in the communicable area, the wireless card (IDm1) 5 has no response because it is the ID (IDm1) specified by the polling command, and the wireless card (IDm2) 5 When the slot # 0 is selected and the wireless card 5 (IDm3) selects the slot # 2, the reader / writer 3 sets the wireless card (IDm2) 5 that has selected the slot # 0 and the wireless card that has selected the slot # 2. Card (IDm3) 5 is received.

Here, the reader / writer 3 is
Card IDs (IDm1, IDm1,
IDm2, IDm3). Next, the operation of the host device 1 according to the wireless card system of the present invention will be described with reference to the flowchart of FIG.

The CPU 31 of the host device 1 sends a polling command to the reader / writer 3 to set parameters (ST1), and when a response from the reader / writer 3 matches (ST2), identifies the card ID (ST3). ).

Next, the operation of the reader / writer 3 according to the wireless card system of the present invention will be described with reference to the flowchart of FIG. The CPU 31 of the reader / writer 3
When a command is received from the host device 1 (ST11), it is confirmed whether or not it is a polling command (ST12). If it is another command, the command processing is performed (ST13).

If the command is a polling command, the CPU 31
Transmits a polling command to the wireless card 5 (ST
14) Wait for a response for a predetermined time (ST15, ST16), and if there is no response, return to step 14.

When there is a response from the wireless card 5 (ST
16) The CPU 31 checks whether the parameter from the higher-level device 1 has a try designation / immediate response (ST17), and if it is an immediate response, immediately returns a response result to the higher-level device 1 (ST23). If there is a try designation, CPU3
1 sets the designated number of trials n (ST18),
A polling command is transmitted with the detected IDm added (ST19), a predetermined time is waited (ST20), and n ← n-1.
To check if the trial is over (n = 0) (ST21,
22) If the number of trials remains, the process returns to step ST19, and if the number of trials is completed, the response result of all the number of trials is returned to the host device 1 (ST23).

Next, the operation of the wireless card 5 according to the wireless card system of the present invention will be described with reference to the flowchart of FIG. When the wireless card 5 is presented in the communication area of the reader / writer 3, the CPU 51 of the wireless card 5
The power supply is detected and initialized via the receiving unit 54, the demodulating unit 55, and the transmission / reception switching unit 53 (ST31, 32). If a command is received (ST33), it is confirmed whether or not it is a polling command (ST34). If the command is, the command processing is performed and a response is transmitted to the host device 1 (ST35, ST36).

If it is a polling command, the CPU 51
Checks whether or not the system codes match those stored in the memory 52 (ST37). If they do not match, the process returns to step ST33. If they match, the added card ID is stored in the memory 52. It is checked whether or not it matches the stored one (ST38). If not, the process returns to step ST33, and if it matches, the timing (random number according to the number of time slots) is calculated (ST3).
9) Then, a response is transmitted to the reader / writer 3 in that slot (ST39, ST40).

As described above, according to the embodiment of the present invention, the I which has become known by the response from the wireless card is
By adding D to the polling command and sending it from the reader / writer, the wireless card of the known ID that has received this command does not return a response only to the actual reception, thereby reducing response collisions and efficiently providing multiple wireless cards. Can be detected.

When the reader / writer receives the polling command to which the ID and the number of times of polling are added from the higher-level device, the reader / writer automatically adds the ID known by the response from the wireless card to the polling command and automatically specifies the number of times. Only by issuing the polling command and collectively responding the IDs of all the detected wireless cards to the host device, it is possible to improve the processing time efficiency.

[0074]

As described in detail above, according to the present invention,
A wireless card, a reader / writer, a host device, a wireless card system, an information storage medium having a wireless communication function, a transmitting / receiving circuit, and a wireless communication system capable of efficiently detecting a plurality of wireless cards can be provided.

According to the present invention, a wireless card, a reader / writer, a host device, a wireless card system, an information storage medium having a wireless communication function, a transmission / reception circuit, and a wireless communication system capable of improving the efficiency of processing time are provided. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a wireless card system according to the present invention.

FIG. 2 is a diagram showing a schematic configuration of a wireless card.

FIG. 3 is a diagram showing a command packet.

FIG. 4 is a diagram showing a response packet.

FIG. 5 is a diagram showing a command packet.

FIG. 6 is a diagram showing a response packet.

FIG. 7 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card;

FIG. 8 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 9 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 10 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 11 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 12 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 13 is a flowchart for explaining the operation of the host device.

FIG. 14 is a flowchart for explaining the operation of the reader / writer.

FIG. 15 is a flowchart illustrating the operation of a wireless card.

FIG. 16 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

FIG. 17 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card;

FIG. 18 is a time chart for explaining operations among a host device, a reader / writer, and a wireless card.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper apparatus 3 ... Reader / writer (transmission / reception circuit) 5 ... Wireless card (information storage medium which has a wireless communication function) 11, 31, 51 ... CPU (control means) 52 ... Memory (storage means) 53 ... Transmission / reception switching part 54 receiving unit (receiving means) 55 demodulating unit 56 modulating unit 57 transmitting unit

Claims (10)

[Claims] An upper-level device connected to an information storage medium having a wireless communication function and a transmission / reception circuit for performing wireless communication, in response to a response request to the transmission / reception circuit with the information storage medium having a wireless communication function; When the identification information of the information storage medium that has responded to the transmission / reception circuit is received via the transmission / reception circuit, information that makes only the information storage medium having the received identification information unresponsive by adding the identification information An upper-level device, comprising: control means for controlling transmission of a response request with a storage medium to the transmission / reception circuit. 2. A transmission / reception circuit connected to a higher-level device and performing wireless communication with an information storage medium having a wireless communication function, comprising: transmitting a response request from the higher-level device to which identification information of the information storage medium having a wireless communication function is added. Upon receipt, a response request to make only the information storage medium having the identification information no response is transmitted to the information storage medium. When a response from the information storage medium is received, identification of the information storage medium receiving the response is performed. A transmission / reception circuit comprising control means for controlling transmission of information to the higher-level device. 3. An information storage medium having a wireless communication function of performing wireless communication with a transmission / reception circuit connected to a higher-level device, a storage means for preliminarily storing unique identification information, and a response request from the transmission / reception circuit. Receiving means for receiving, and control means for performing control to make no response when the identification information added to the response request received by the receiving means matches the identification information stored in the storage means. An information storage medium having a wireless communication function. 4. A wireless communication system for performing wireless communication between a transmission / reception circuit connected to a higher-level device and an information storage medium having a wireless communication function, wherein the higher-level device includes: an information storage medium having the wireless communication function; A first control unit for controlling transmission of a response request with an information storage medium having a wireless communication function to the transmission / reception circuit to which the identification information is added; When receiving a response request with identification information of an information storage medium having a communication function,
A response request to make only the information storage medium having the added identification information no response is transmitted to the information storage medium having the wireless communication function, and when a response from the information storage medium is received, the information received the response. An information storage medium having second control means for controlling transmission of identification information of a storage medium to the higher-level device, wherein the information storage medium having the wireless communication function stores unique identification information in advance; Receiving means for receiving a response request from the second control means; and determining that there is no response if the identification information added to the response request received by the receiving means matches the identification information stored in the storage means. A wireless communication system, comprising: third control means for performing control. 5. A wireless communication system for performing wireless communication between a transmission / reception circuit connected to a higher-level device and an information storage medium having a wireless communication function, wherein the higher-level device transmits the information to the information storage medium having the wireless communication function. A first control unit for controlling the transmission of a response request with the information storage medium having a wireless communication function to the transmission / reception circuit by adding the number of times of the response request to the transmission / reception circuit. A response request is transmitted to the information storage medium having the wireless communication function based on the response request to which the number of response requests to the information storage medium having the wireless communication function transmitted from the information storage medium having the wireless communication function is added. When the response is received, the next response request to which the identification information of the information storage medium that has received the response is added is transmitted to the information storage medium having the wireless communication function. A response request to which the identification information of the information storage medium received for each response request is further added is transmitted to the information storage medium having the wireless communication function, and when the number of added response requests is completed, the information storage having the wireless communication function is completed. A second control unit that performs control to transmit all the identification information of the information storage medium responded from the medium to the host device at a time, wherein the information storage medium having the wireless communication function has a unique identification information. A receiving means for receiving a response request from the second control means, and identification information added to the response request received by the receiving means being stored in the storage means. And a third control unit that performs a control of not responding when the identification information matches the identification information. 6. A higher-level device connected to a reader / writer that performs wireless communication with a wireless card, wherein the identification of the wireless card responded from the reader / writer in response to a response request to the reader / writer with the wireless card. When receiving the information, a control means is provided for controlling the transmission of a response request to the reader / writer to the wireless card which adds the identification information and makes only the wireless card of the identification information unresponsive. Upper device. 7. A reader / writer connected to a higher-level device and performing wireless communication with a wireless card, when receiving a response request to which identification information of a wireless card is added from the higher-level device, only the wireless card having the identification information is received. A reader for transmitting a response request to make no response to the wireless card, and when receiving a response from the wireless card, controlling means for controlling transmission of identification information of the wireless card to the higher-level device; /lighter. 8. A wireless card for performing wireless communication with a reader / writer connected to a higher-level device, a storage means for preliminarily storing unique identification information, and a receiving means for receiving a response request from the reader / writer. And control means for performing a control to make no response when the identification information added to the response request received by the receiving means matches the identification information stored in the storage means. Wireless card. 9. A wireless card system for performing wireless communication between a reader / writer connected to a higher-level device and a wireless card, wherein the higher-level device adds identification information of the wireless card and responds to the wireless card. 1st control for transmitting a request to the reader / writer
When the reader / writer receives a response request to which the identification information of the wireless card has been added from the first control means, only the wireless card with the added identification information does not respond. A second control means for transmitting a response request to the wireless card and, when receiving a response from the wireless card, performing control for transmitting identification information of the wireless card to the higher-level device, wherein the wireless card comprises: Storage means for storing unique identification information in advance; reception means for receiving a response request from the second control means; and identification information added to the response request received by the reception means in the storage means And a third control unit for performing a control of not responding when the identification information matches the stored identification information. 10. A wireless card system for performing wireless communication between a reader / writer connected to a higher-level device and a wireless card, wherein the higher-level device adds the number of response requests to the wireless card to the wireless card. And a first control unit for controlling transmission of the response request to the reader / writer, wherein the reader / writer has added the number of response requests to the wireless card transmitted from the first control unit. A response request is transmitted to the wireless card based on the response request, and when a response to the response request from the wireless card is received, a next response request to which the identification information of the wireless card is added is transmitted to the wireless card. Transmitting a response request to which the identification information of the wireless card received for each response request is further added to the wireless card, and when the added number of response requests is completed, A second control unit that performs control to transmit all the identification information of the wireless card responded from the line card to the higher-level device at a time, and the wireless card previously stores unique identification information. Storage means; reception means for receiving a response request from the second control means; and identification information added to the response request received by the reception means matched with the identification information stored in the storage means. And a third control means for performing a control of making no response in the case. A wireless card system comprising: