JP2002032726A - Portable information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To verify hardware and software of RWU and CLU smoothly and efficiently in terms of time by eliminating a case wherein the CLU does not respond during a communication between the RWU and CLU and grasping the state of the CLU in real time. SOLUTION: The portable information processor (1) equipped with means (2, 3, 4) which transmits and receives information to and from at least a reader writer with radio waves and has a function of always sending specific return data corresponding to the received wave when receiving the radio wave from the reader writer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable information processing apparatus such as an IC card which can be activated by utilizing an electromagnetic induction phenomenon, and thereafter can also operate and exchange information with a reading / writing apparatus by using radio waves.

[0002]

2. Description of the Related Art Conventionally, a contactless portable information processing device (contactless unit: RWU) is transmitted by radio waves transmitted from a read / write device (reader / writer unit: RWU).
CLU) is activated, and information exchange is performed using radio waves. FIG. 7A shows a case where there is one CLU in a range where a carrier wave from the RWU reaches, and FIG.
Means that a plurality of CLUs (CL
U1 and CLU2) are present. As described above, when information exchange between the RWU and the CLU is performed using radio waves, a plurality of CLUs are within a range where a carrier wave from the RWU reaches.
Assuming that there is a CL between the RWU and the CLU,
Exchange of individual information (CID: Chip ID) specifying U is performed. The CID is a value based on the serial number of the CLU or a random number generated each time.

The CLU sends the CID to the RWU as a part of the transmission data, and the RWU sends the CID back to the CLU as a part of the transmission data. The CLU continues communication only when the returned CID matches its own CID. A check code for detecting a transmission error is added to each other's transmitted / received data. The CLU continues processing only when the received data and the check code match, and when they do not match, there is no response, and the next reception is performed. I'm waiting.

[0004] The RWU waits for a response from the CLU, but if there is no response within a predetermined time, the CLU determines that there is no response. In some cases, there are a plurality of CLUs that receive and activate a carrier from the same RWU. In such a situation, each CLU does not respond unless it should respond in order not to disturb responses from other CLUs. Of course, R
If the CLU does not exist within the range where the radio wave from the WU reaches, the RWU cannot receive.

An example of a check code (an example of a data format) added to transmission data will be described with reference to FIG. FIG. 8A shows an example in which several bytes of data are grouped together and a code (BCC) for performing a block check is added using the data as a calculation range. FIG. FIG. 8C shows an example in which a bit (CC) for performing a parity check is added for each byte of data, and a block of several bytes of data is set as a calculation range. An example is shown in which a code (BCC) is added and a bit (CC) for performing a parity check of the BCC is further added. Such a check code is added, and the CLU decides whether to continue the process or not respond depending on whether or not the received data and the check code match.

Next, referring to FIGS. 9 to 11, a description will be given of a conventional communication example in which one CLU and two CLUs are used for an RWU. In the figure, the transmission direction is RWU,
An arrow indicates which of the CLUs is transmitting data. FIG. 9 shows an example in which there is one CLU for the RWU and communication is normally performed. R
A call command is transmitted from the WU (step 1-1),
Since the CLU is out of the radio range (step 1-2),
The calling command is transmitted again from the RWU (step 1)
-3). Assuming that the CLU is within the range of radio waves from the RWU, the CLU responds to the call command (step 1-).
4) In response, the RWU transmits a data read command to the CLU (step 1-5), and the CLU transmits data in response to the command (step 1-6), and continues communication thereafter (step 1). -7). In this example, it is assumed that the CID matches and the check code matches.

FIG. 10 shows an example in which one CLU is used for an RWU and communication is not normally performed. R
A call command is transmitted from the WU (step 2-1),
Since the CLU is out of the radio range (step 2-2),
The calling command is transmitted again from the RWU (step 2
-3). At this time, it is assumed that the CLU has entered the radio wave range. However, the CLU does not respond (step 2-
4) On the other hand, the RWU transmits the call command again (step 2-5), but the CLU still has no response (step 2-6). In this example, it is assumed that the CLU is within the radio wave range.
The RWU cannot determine whether the CLU is in a CID mismatch, check code error, or unreceivable condition.

FIG. 11 shows an example of communication in the case where there are two CLUs for the RWU. A call command is transmitted from the RWU (step 3-1), and since the CLU is out of the radio wave range (step 3-2), the call command is transmitted again from the RWU (step 3-3). At this time, it is assumed that the CLU has entered the radio wave range. On the other hand, CL
There is a response from each of U1 and CLU2 (step 3
-4), since a plurality of CLUs responded, the RWU
An identification command is transmitted (step 3-5). This identification command is a command that specifies a plurality of time segments and prompts to respond at some timing. In this example,
First, CLU1 responds and CLU2 does not respond (step 3-6). Further, the CLU identification command is transmitted from the RWU (step 3-7). Since the CLU1 has already responded, there is no response, and the CLU2 responds (step 3-8).
Thereafter, communication is continued (step 3-9). In this example, the RWU is an advanced function and has an ability to return the same CID as the CID generated from the CLU based on a random number.

[0009]

As described above, when information exchange between the RWU and the CLU is performed using radio waves, the CLU often does not respond. RWU is CLU
Can be determined to have no response, but the CLU cannot determine what is causing the non-response and what the state is.

The present invention has been made to solve the above-mentioned problem, and it is possible to prevent the CLU from becoming unresponsive during the communication between the RWU and the CLU so that the status of the CLU can be grasped in real time. An object of the present invention is to enable a smooth and time-efficient verification of software and software.

[0011]

SUMMARY OF THE INVENTION The present invention relates to a portable information processing apparatus having at least a means for transmitting information to a reader / writer device through a radio wave, and receiving a radio wave from the reader / writer device. When it does, it has a function to always transmit the predetermined return data according to the received radio wave, that the return data can always be transmitted through the I / O line of the contact terminal, and always transmits the predetermined return data. The function to perform this function can be set to valid / invalid, and the predetermined return data is information for indicating that communication is possible, information for indicating an error in transmitted data, and information for indicating a delay in response.

[0012]

Embodiments of the present invention will be described below. FIG. 1 is a diagram showing a configuration example of a CLU to which the present invention is applied. CLU1 has the RW as shown in FIG.
It has information transmitting means 2 to 4 for exchanging information with U. The information transmitting means 2 and 3 are means for transmitting information via radio waves, and have different radio wave modulation systems.
The information transmission means 4 represents a contact terminal, and is a means for realizing contact-type information transmission. The CPU 5 is an arithmetic unit that interprets and executes (for example, reads / writes) a command from the RWU transmitted via the information transmission means, and responds to the RWU. The non-volatile memory 6 is a storage device for storing data such as control information and software. The volatile memory 7 is a storage device that provides a work area when the CPU performs an operation.

FIG. 2 is a diagram showing a part of the contents of the nonvolatile memory managed by the OS of the CLU. CLU1 of the present invention
Has an error code return valid / invalid flag set. In the test mode, this flag is set to be valid, and a code for notifying that it is in a radio wave range and is ready to respond to a call from the RWU, A code corresponding to the situation, a code responding with a delay, etc. are transmitted. For example, a communicable code (00) indicating that the RWU can respond to a call from the RWU, an error code (01) for a parity check error / block check error, and an error code for too short data (format error) Code (02), Era code (03) for too long data (format error), CI
D, an error code (04) in the case of a mismatch, and a return delay code (05) for preventing a response of another CLU from being stored, and when a radio wave is received from the RWU or the RWU
When a signal is received from the device, a communicable code, a code corresponding to an error occurring at the time of reception, and a return delay code are returned. By receiving this response, the RWU can determine whether the CLU is within the radio wave range or not, and what the situation is within the radio range. It can be determined that the transmission / reception function is not working. The information can be transmitted between the RWU and the CLU through the contact terminal (the information transmitting means C in FIG. 1). The returned code and the return delay code may be sent.

In the case of the normal use mode other than the test mode, the flag is set invalid, and an error occurs even if the signal is received even if the signal is received within the radio wave range from the RWU. No response in case, one RWU
If there are multiple CLUs within the radio wave range of
When the LU is responding, the other CLUs do not respond.

In the CLU identification command, a plurality of time sections are specified to prompt a response at some timing. When another CLU responds, the response is delayed by a predetermined time. The delay amount at this time may be a fixed value such as 10 msec in advance, or may be stored in the nonvolatile memory as the return delay amount,
This may be referred to.

FIG. 3 shows an example of communication in which a communicable state is notified when the radio wave enters the radio wave range from the RWU. CLU
Is out of the radio wave range from the RWU (step 4-
1), there is no communication between the RWU and the CLU. CLU is RW
When the radio wave is within the radio wave range from U, a communicable code (00) indicating that the communicable state is established is transmitted to the RWU (step 4-2), and the communicable code (00) is transmitted until a command is transmitted from the RWU (step 4-2). 00) (steps 4-3 to 4-5). As described above, when the CLU enters the radio wave range, the communicable code (00) is transmitted.
The WU can know that communication has become possible.

FIG. 4 shows an example in which an error code is returned from the CLU. A call command is transmitted from the RWU (step 5-1). Since the CLU is out of the radio wave range (step 5-2), there is no response, and the call command is transmitted again from the RWU (step 5-3). At this time CL
U is assumed to have entered the radio wave range. The CLU responds by transmitting, for example, a CID (step 5-4). On the other hand, the RWU reads data from the CLU,
An application command for writing data into U is transmitted (step 5-5). At this time, CLU
Returns an error code (01) when there is a parity check or a BCC error (step 5-6). When the RWU transmits the application command again (step 5-7), if the data transmitted from the RWU has a format error that is too short, an error code (0) is output.
2) is returned (step 5-8), and when the application command is transmitted again from the RWU (step 5).
-9) If the data sent from the RWU has a format error that is too long, an error code (03) is returned (step 5-10). As described above, since the error code is returned from the CLU, the RWU can grasp the state of the CLU.

FIG. 5 shows an example of communication when there are two CLUs. A call command is transmitted from the RWU (step 6-1), and the CLU is out of the radio range (step 6--6).
2) For this purpose, a call command is transmitted again from the RWU (step 6-3). At this time, it is assumed that the CLU has entered the radio wave range. From CLU1 and CLU2, for example,
The RWU transmits a CID as a part of the data and responds (step 6-4), and the RWU transmits a CLU identification command (step 6-5). The CLU identification command is a command for designating a plurality of time segments and prompting to respond at some timing. In this example, CLU1 responds first, and then CLU2 responds with a delay (in this case, 10 ms delay). Return the return delay code 05 (Step 6-
6). Subsequently, when the CLU identification command is transmitted from the RWU (step 6-7), the CLU2 responds and the CLU2 responds.
1 returns a return delay code 05 that responds with a delay (step 6-8), and thereafter communication is continued (step 6--6).
9). Thus, when a plurality of CLUs are within the radio wave range from one RWU, if one responds, the other CLUs
LU returns a return delay code that responds with a delay,
The RWU can also grasp situations other than the responding CLU.

FIG. 6 is a diagram showing the flow of the processing of the CLU and the processing of the RWU in the communication of the present invention. When a command is transmitted from the RWU (step S1), the CLU receives the command and interprets the command (step S2), and determines whether the parity check and BCC are normal (step S1).
3). In the case of an abnormality, judge whether or not it is in the test mode,
(Step S4) When there is no test mode, there is no response (Step S5). In the case of test mode, after performing delay processing, an error code (01) is returned to the RWU (Steps S6 and S7). ). If the data is normal in step S3, it is determined whether or not there is a format error in which the data is too short (step S8). If abnormal, it is determined whether or not the test mode is set (step S9),
If it is not in the test mode, there is no response (step S
10) In the case of the test mode, after performing the delay processing, an error code (02) is returned to the RWU (steps S11 and S12). In step S8,
If the data is normal, it is determined whether there is a format error in which the data is too long (step S13). If it is abnormal, it is determined whether or not it is in the test mode (step S14). If it is not in the test mode, there is no response (step S1).
5) In the test mode, after performing the delay processing,
An error code (03) is returned to the RWU (steps S16 and S17). If it is normal in step S13, it is determined whether or not the CID is correct (step S1).
8). If it is abnormal, it is determined whether or not it is in the test mode (step S19). If it is not in the test mode, there is no response (step S20). ) Is returned to the RWU (steps S21, S22).

[0020]

As described above, according to the present invention, in the RWU / CLU under development, the CLU does not become unresponsive during the communication between the RWU and the CLU, and the state of the CLU can be grasped in real time. Hardware and software verification can be performed smoothly. Further, since there is no need to wait for the response waiting time from the CLU, the time efficiency of the verification work can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a CLU to which the present invention is applied.

FIG. 2 is a diagram showing a part of the contents of a nonvolatile memory managed by an OS.

FIG. 3 is a diagram illustrating a communication example in which a communicable state is notified when the mobile phone enters a radio wave range from an RWU.

FIG. 4 is a diagram illustrating a communication example in which an error code is returned from a CLU.

FIG. 5 is a diagram illustrating an example of communication when two CLUs are used.

FIG. 6 shows CLU processing and RWU in communication according to the present invention.
It is a figure which shows the flow of a process.

FIG. 7 is an explanatory diagram of performing information exchange between the RWU and the CLU using radio waves.

FIG. 8 is a diagram illustrating an example of a check code added to transmission data.

FIG. 9 is a diagram illustrating an example in which communication is normally performed with one CLU.

FIG. 10 is a diagram illustrating an example in which there is one CLU and the CLU does not respond;

FIG. 11 is a diagram illustrating a communication example when there are two CLUs.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CLU, 2, 3 ... means for transmitting information via radio waves, 4 ... contact-type information transmitting means, 5 ... CPU, 6 ... nonvolatile memory, 7 ... volatile memory.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C005 NA08 NA09 TA22 5B035 AA00 BB09 BC00 CA23 5B065 BA09 EA39 5B083 AA08 BB02 CD00 EE07

Claims (6)

[Claims] 1. A portable information processing device having at least means for transmitting information to a reader / writer device via a radio wave, wherein when a radio wave from the reader / writer device is received, the portable information processing device responds to the received radio wave. A portable information processing apparatus having a function of constantly transmitting predetermined return data. Means for transmitting information through an I / O line of a contact terminal with a reader / writer device;
2. The portable information processing apparatus according to claim 1, wherein the portable information processing apparatus has a function of constantly transmitting predetermined return data via an / O line. 3. The portable information processing apparatus according to claim 1, wherein a function of constantly transmitting the predetermined return data can be set to valid / invalid. 4. The portable information processing apparatus according to claim 1, wherein the predetermined return data is information indicating that communication is possible. 5. The portable information processing apparatus according to claim 1, wherein the predetermined return data is information indicating an error in the transmitted data. 6. The portable information processing apparatus according to claim 1, wherein the predetermined return data is information for notifying a delay of a response.