WO2001009709A1 - Ic card connector - Google Patents
Ic card connector Download PDFInfo
- Publication number
- WO2001009709A1 WO2001009709A1 PCT/JP2000/005154 JP0005154W WO0109709A1 WO 2001009709 A1 WO2001009709 A1 WO 2001009709A1 JP 0005154 W JP0005154 W JP 0005154W WO 0109709 A1 WO0109709 A1 WO 0109709A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- card
- retransmission request
- connection device
- overrun
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/08—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers from or to individual record carriers, e.g. punched card, memory card, integrated circuit [IC] card or smart card
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
Definitions
- the present invention relates to an IC card connection device for receiving data transmitted from an IC card.
- FIG. 11 shows the conventional general configuration of a connection device (reader / writer) for an IC card with external terminals (hereinafter abbreviated as IC card).
- Standards for Ic cards include IE CZ ISO 7816.
- 1000 is an IC card connection device
- 101 is a CPU
- 109 is an IC card.
- reference numeral 201 denotes a transmission buffer, which temporarily stores transmission data sent from the CPU 101.
- a parity generation unit 202 calculates and adds parity of transmission data.
- Reference numeral 203 denotes a parallel / serial converter, which serially transmits a start bit, transmission data, and a parity bit.
- Reference numeral 204 denotes a retransmission request signal generation circuit which generates a retransmission request signal when the received data has a parity error, and sends it to the IC card 109.
- Reference numeral 301 denotes a transmission / reception switching unit, which switches between transmission and reception in communication with the IC card 109.
- 302 is a serial Z-parallel conversion unit, which receives start bits, data, and data sent from the IC card 109 serially. Receive the retain bit.
- a parity check unit 303 checks the parity of the received data, and notifies the retransmission request signal generation circuit 204 if there is a parity error.
- 304 is a reception buffer, which stores received data in C Stored temporarily until read into PU101.
- Reference numeral 1101 denotes a pull-up resistor that switches the signal level of a data terminal (not shown) to High or Low.
- Figures 12 (a) and 12 (b) show the format of the data sent from the IC card 109.
- the data terminal of the IC card 109 keeps the high impedance state when not communicating, and is fixed to the signal level High by the pull-up resistor 1101.
- the data transmission of the IC card 109 is performed with the character 1200 as a unit, starting from the start bit 1201 of the signal level Low, followed by the data 8 bits (Da, Db, Dc, Dd, De, Df, Dg, Dh) 1202, no. It is composed of a total of 10 bits, that is, 1ity bit 1 203.
- the noise bit 1203 is set so that the number of signal levels H igh of the data 8 bits 1202 is counted.If the number is even, the signal level is Low, and if the number is odd, the signal level H igh is set. I have.
- the receiving side IC card connection device 1000 After sending the NORITY bit 1 201, return the data terminal to the high impedance state.
- the data terminal is fixed at the signal level High by the bull-up resistor 111.
- the receiving side IC card connection device 1000 compares the value of the parity bit calculated from the received data 8 bits 1202 with the value of the received parity bit 12003. No ,. If the value of the parity bit 1 203 is correct, the receiver prepares to receive the next data.
- parity bit 1 203 If the value of parity bit 1 203 is incorrect, it is determined that a parity error has occurred, and the minimum of 1 etu and the maximum after ((10.5 ⁇ 0.2) etu) of the start bit 1 201 During 2 etu, the data terminal is set to signal level Low as an error signal. At this time, the error signal 1 2 20 is as shown in Fig. 1 2 (b) As shown in the figure, it is located within the character protection period 1 210. The transmitting side checks the signal level of the data terminal after (11 ⁇ 0.2) etu from the start bit, and performs the following operation.
- the user carries the IC card with the user, but since the data terminal of the IC card is exposed to the outside, the terminal is liable to deteriorate due to wear and corrosion, and is dirty, water, and static electricity. It is easy to be affected. Therefore, the IC card connection device is required to correctly and reliably transmit and receive data to and from the IC card in response to such disturbances. In addition, in order for IC cards to become widespread, it is necessary to inexpensively implement a function that correctly and reliably transmits and receives data.
- reception overrun the reception data is discarded or already stored in the reception buffer. There is no other way than discarding the stored data, and the CPU cannot read the correct received data. If the capacity of the receiving buffer is reduced, such a receiving overrun tends to occur. In the past, if a reception overrun occurred when receiving an initial response from the IC card, it was necessary to reset the IC card and re-receive all data.
- FIG. 13 is a diagram showing the sampling timing of receiving data of one character on each of the transmitting side and the receiving side. Mouth terminal
- the present invention considers such problems in data transmission / reception with a conventional IC card, and can reliably receive data even when the capacity of a reception buffer is small, and detects transmission errors caused by noise and the like. It is an object of the present invention to provide an IC card connection device capable of improving the rate and realizing more reliable data transmission.
- a first aspect of the present invention is a receiving means for receiving data transmitted from an IC card for each predetermined processing unit
- a receiving buffer for temporarily storing the data received by the receiving means for each predetermined processing unit
- a reception buffer status flag that is set when the reception buffer is in a state where it can no longer store data
- the receiving buffer state flag When the receiving buffer state flag is set, when the receiving means newly receives data, the data is detected as overrun, and the overrun detecting means for discarding the newly received data.
- An IC card connection device comprising transmission request means, which can reliably receive data sent from an IC card.
- the second invention (corresponding to claim 2) further comprises a PTS flag that is set only when the IC card can retransmit data in character units,
- the retransmission request means requests the IC card to retransmit the received data when the overrun is detected and the PTS flag is set.
- the IC force connection device according to the first aspect of the present invention, which can reliably receive data transmitted from an IC card capable of retransmitting data in character units.
- the third invention (corresponding to claim 3) is characterized in that the overrun detection means further comprises an overrun detection plug set when the overrun detection detects the overrun.
- the IC card connection device of the present invention can reliably receive data sent from an IC card.
- a fourth invention is an overrun detection counter for counting the number of overruns detected by the overrun detection means
- a retransmission request count register that defines a maximum value of the number of overruns
- a first aspect of the present invention is an IC force connection device according to the first aspect of the present invention, wherein the device is transmitted from an IC card. Function for reliably receiving such data does not fall into an infinite loop.
- the retransmission request status register for notifying that the number of the detected overruns has reached the number specified in the retransmission request number register is provided.
- An IC card connection device according to a fourth aspect of the present invention, further comprising: a function for reliably receiving data sent from the IC card does not fall into an infinite loop.
- a sixth aspect of the present invention is a receiving means for receiving a signal including data of a predetermined processing unit transmitted from an IC card and transmitted with a protection period interposed therebetween,
- the receiving means When the receiving means receives the data of the predetermined processing unit, a signal level for detecting the level of the signal in a predetermined period after a reception period for receiving the data is determined in advance. Inspection means;
- the signal level inspection means detects a predetermined level in all or a part of the signal within the predetermined period, the data of the predetermined processing unit is discarded, and A retransmission requesting means for requesting retransmission of the same data as the discarded data, wherein the data transmitted from the IC card is It can be received reliably.
- the signal level inspection means detects a level of the signal in a minimum unit of the predetermined period ⁇ ⁇ immediately after the reception period.
- a sixth aspect of the present invention is an IC card connection device according to the sixth aspect, wherein data transmitted from the IC card can be reliably received.
- the eighth invention (corresponding to claim 8) further includes a PTS flag that is set only when the IC card can retransmit the data in character units,
- the retransmission request unit is configured to detect the reception data for the IC card when the signal level inspection unit detects the predetermined signal level during the predetermined period and the PTS flag is set.
- the sixth or seventh aspect of the present invention is an IC card connection device according to the sixth or seventh aspect, wherein the data transmitted from the IC card capable of retransmitting data in character units. Can be reliably received.
- the ninth invention (corresponding to claim 9) is characterized in that the signal level checking means further comprises a frame violation flag that is set when the predetermined signal level is detected during the predetermined period. According to the sixth or seventh aspect of the present invention, it is possible to reliably receive the data sent from the IC card.
- a tenth aspect of the present invention is: a frame violation detection counter for counting the number of times the predetermined signal is detected during the predetermined period by the signal level inspection means;
- a retransmission request count register for defining the maximum value of the number of detections of the predetermined signal
- Comparing means for comparing the number counted by the frame violation detection counter with the value of the retransmission request number register
- the retransmission request unit as a result of the comparison by the comparing unit, when the number of times the predetermined signal is detected during the predetermined period reaches a specified number of times in the retransmission request number register, the received data and
- the IC card connection device according to the sixth or seventh aspect of the present invention, which does not make a request for retransmission of data of the same character, wherein the device reliably receives data sent from the IC card.
- the function does not fall into an infinite loop.
- the eleventh invention (corresponding to claim 11) is characterized in that the number of times that the predetermined signal level is detected during the predetermined period is equal to the number of times of the retransmission request number register.
- a tenth aspect of the present invention further comprising a retransmission request status register for notifying that the specified number of times has been reached, wherein the data transmitted from the IC card is securely transmitted. The function for receiving a call does not fall into an infinite loop.
- the 12th invention executes all or a part of the functions of all or a part of the invention according to any one of the first to the eleventh by a computer.
- a thirteenth aspect of the present invention executes all or a part of the functions of all or part of the first to eleventh aspects of the present invention by a computer. It is an information aggregate characterized by being a program and Z or data for causing the program to execute.
- the IC card connection device of the present invention as described above has a function of checking whether or not the reception buffer can store data, and when the reception buffer cannot store the received data any more and receives new data, the IC card Request retransmission. As a result, the IC card transmits the same data again, but if the CPU reads data from the reception buffer during this time, the data can be stored in the reception buffer.
- the present invention is characterized by preventing reception overrun and reliably receiving correct data. According to the present invention, data can be reliably received even if the capacity of the receiving buffer is reduced, so that an inexpensive IC card connection device can be provided.
- the present invention is characterized in that correct data is reliably received.
- ADVANTAGE OF THE INVENTION since the data transmission rate of the receiving side and the transmitting side temporarily differs under the influence of noise etc., the detection rate of the transmission error which arises improves, so that more reliable data transmission can be realized.
- FIG. 1 is a system diagram of an IC card connection device according to Embodiment 1 of the present invention.
- FIG. 2 is a system diagram of an IC card connection device according to Embodiment 2 of the present invention.
- FIG. 3 is a system diagram of an IC card connection device according to Embodiment 3 of the present invention.
- FIG. 4 is a system diagram of an IC card connection device according to Embodiment 4 of the present invention.
- FIG. 5 is a system diagram of an IC card connection device according to Embodiment 5 of the present invention.
- FIG. 6 is a system diagram of an IC card connection device according to Embodiment 6 of the present invention.
- FIG. 7 is a system diagram of an IC card connection device according to a seventh embodiment of the present invention.
- FIG. 8 is a system diagram of an IC card connection device according to Embodiment 8 of the present invention.
- FIG. 9 is a system diagram of an IC card connection device according to Embodiment 9 of the present invention.
- FIG. 10 is a system diagram of an IC card connection device according to Embodiment 10 of the present invention.
- FIG. 11 is a system diagram of a conventional IC force connection device.
- FIG. 12 is a diagram showing (a) and (b) the transmission data format of the IC card.
- FIG. 13 is a timing chart showing a transmission example in which no parity error occurs.
- FIG. 14 is a diagram for explaining the received data for one character and the signal level of the character protection period in the process of the IC card connection device according to the sixth embodiment of the present invention. Explanation of reference numerals
- FIG. 1 shows a system of an IC card connection device according to Embodiment 1 of the present invention.
- FIG. The IC card connection device according to the present embodiment when a reception buffer for temporarily storing data sent from the IC card cannot store the received data anymore, newly receives the data. It has the function of discarding data, making a retransmission request to the IC card, and receiving the same data again.
- 100 is an IC card connection device
- 100 is a Ui CPU
- 109 is an IC card.
- reference numeral 201 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- Reference numeral 203 denotes a parallel Z-to-serial conversion unit that serially transmits a start bit, transmission data 8 bits, and a knowledge bit.
- Reference numeral 102 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card and data reception from the IC card 109.
- Reference numeral 302 denotes a serial / Z-parallel conversion unit as receiving means of the present invention for receiving data transmitted serially from the IC card 109.
- Reference numeral 303 denotes a parity checker that compares the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data in character units.
- Reference numeral 3005 denotes a reception buffer status flag indicating that when the capacity of the reception buffer 304 becomes full, no more reception data can be stored.
- Reference numeral 3006 denotes an overrun check unit as overrun detection means of the present invention for detecting that new data has been received (reception overrun) when the reception buffer status flag 305 is set. is there.
- Reference numeral 1101 denotes a pull-up resistor which switches the signal level of a data terminal (not shown) to High or Low.
- IC card connection according to Embodiment 1 of the present invention configured as above The operation of the apparatus will be described with reference to the drawings.
- the data sent serially from the IC card 109 has a character unit as shown in Fig. 12.
- One character 1200 starts with a start bit 1201, and then data 8 Bits 122, no,.
- the serial / parallel converter 302 receives the data.
- the parity check unit 303 checks whether the parity calculated from the received data 8-bits 122 and the received parity bits 123 are the same. If the parities do not match, the retransmission request signal generation unit 102 is notified, and the retransmission request signal generation unit 102 sends a retransmission request signal to the IC card 109.
- the overrun detection unit 303 examines the reception buffer status flag 305, and stores the reception data in the reception buffer 304 if the reception buffer status flag 305 is not set. At this time, if the capacity of the reception buffer 304 becomes full due to the storage of the reception data, the reception buffer end status flag 305 is set.
- the overrun check unit 360 discards the received data and generates a retransmission request signal in the retransmission request signal generation unit 102. Input to perform.
- the retransmission request signal generating section 102 transmits data having the same character as the discarded received data from the IC card 109 based on the input.
- a retransmission request signal to cause the IC card 109 to output the retransmission request signal.
- the IC card 109 retransmits the same character data as the previously transmitted data. Further, while the IC card 109 retransmits data, the reception buffer 304 outputs the temporarily stored data to the CPU 101. This Since the receiving buffer 304 has free space, the receiving buffer status flag 305 is released.
- the data retransmitted from the IC card 109 is received by the IC card connection device, and after the parity check unit 303 confirms that the parity matches, the overrun detection unit 310 determines Since it was checked that the reception buffer status flag 3005 was not set, the retransmitted data is stored in the reception buffer 304.
- the single balun check unit 3006 checks the reception buffer status flag 3005 and the reception buffer 304 becomes full. After confirming that the data has not been received, the retransmission request signal generator 102 is used to retransmit the data once received from the IC card 109 in character units, causing a reception overrun. In this case, it is not necessary to reset the IC card and re-receive all data.
- FIG. 2 is a system diagram of an IC card connection device according to Embodiment 2 of the present invention.
- 110 is an IC card connection device
- 110 is a Ui CPU
- 109 is an IC card.
- reference numeral 210 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data. 2 0 3 This is a parallel-to-serial converter that transmits the start bit, transmission data 8 bits, and parity bit serially.
- Reference numeral 103 denotes a retransmission request signal generation unit as a retransmission request unit of the present invention that issues a retransmission request signal to the IC card 109.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial Z / parallel conversion unit that receives data transmitted serially from the IC card 109.
- Reference numeral 303 denotes a parity check unit that compares the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data in character units.
- Reference numeral 3005 denotes a reception buffer state flag indicating that when the capacity of the reception buffer 304 becomes full, no more reception data can be stored.
- Reference numeral 360 denotes an overrun inspection unit as overrun detection means of the present invention, which detects reception overrun based on the reception buffer status flag 305.
- Reference numeral 307 denotes a PTS flag indicating the transmission protocol of the IC card 109. Further, 1 1 0 1 is a pull-up resistor, Ru switches the signal level of the data terminal (not shown) in H i g h or L ow.
- the parity checker 3 0 3 In it checks whether the parity calculated from the 8 bits of received data matches the received parity.
- the retransmission request signal generation unit 103 If the parities do not match, the retransmission request signal generation unit 103 is notified, and the retransmission request signal generation unit 103 sets the IC card 109 when the PTS flag 307 is set. Sends a retransmission request signal. If the parities match, the received data will be
- the overrun detection unit 303 checks the reception buffer status flag 305, and discards the received data if the reception buffer status flag 305 is set. At the same time, if the PTS flag 307 is set by the retransmission request signal generation unit 103, the retransmission request signal is sent to the IC card 109.
- the receive buffer status flag 305 is set only when the receive buffer 304 cannot store any more received data.
- the retransmission request signal generation unit 103 performs retransmission with reference to the PTS flag 307,
- FIG. 3 is a system diagram of an IC card connection device according to Embodiment 3 of the present invention.
- the IC card connection device according to the present embodiment when receiving data newly when the reception buffer for temporarily storing the data sent from the IC card 109 cannot store the received data any more, It has a function of discarding new data, sending a retransmission request signal to the IC card 109, and notifying the overrun detection to the outside.
- 120 is an IC card connection device, 10 Ui CPU, 10 9 is an IC card.
- reference numeral 210 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- Reference numeral 203 denotes a parallel / serial conversion unit that serially transmits a start bit, eight transmission data bits, and a parity bit.
- Reference numeral 102 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial / parallel conversion unit as receiving means of the present invention for receiving serially transmitted data from the IC card 109.
- Reference numeral 303 denotes a parity check unit that compares a received parity bit with a parity calculated from received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data in character units.
- Reference numeral 3005 denotes a reception buffer status flag indicating that when the capacity of the reception buffer becomes full, no more received data can be stored.
- Reference numeral 303 denotes an overrun detection unit that detects a reception overrun based on the reception buffer status flag 305.
- Reference numeral 308 denotes an overrun detection flag that is set when a reception overrun is detected.
- Reference numeral 1101 denotes a pull-up resistor, which switches the signal level of a data terminal (not shown) to High or Low.
- the parity check unit 303 checks whether the parity calculated from the eight bits of the received data matches the received parity. If the parities do not match, retransmission is required.
- the request signal generation unit 102 is notified and sends a retransmission request signal to the IC card 109. If the parities match, the received data is sent to the over-run check unit 310.
- the overrun inspection unit 300 inspects the reception buffer status flag 305, discards the received data if the reception buffer status flag 305 is set, and generates a retransmission request signal generation unit 102. Causes the IC card 109 to send a retransmission request signal.
- the receive buffer status flag 305 is set only when the receive buffer 304 cannot store any more received data.
- the overrun inspection unit 303 detects a reception overrun
- the overrun detection flag 308 is set. Set. The status of the overrun detection flag 308 is checked by the CPU 101, so that the CPU 101 can know that an overrun has occurred while receiving data from the IC card.
- FIG. 4 is a system diagram of an IC card connection device according to Embodiment 4 of the present invention.
- the IC card connection device according to the present embodiment is provided when a reception buffer for temporarily storing data sent from the IC card 109 cannot receive the received data any more and receives new data. It has a function of transmitting a retransmission request signal to 109 and not transmitting a retransmission request signal when the number of consecutive retransmission requests for the reception of the same data has reached a specified number.
- 130 is an IC card connection device
- 100 is a Ui CPU
- 109 is an IC card.
- reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- 203 sets the start bit, transmission data 8 bits, and parity bit in series. This is a parallel Z-serial conversion unit that transmits data to the computer.
- Reference numeral 104 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial Z / parallel conversion unit that receives data transmitted serially from the IC card 109.
- Reference numeral 303 denotes a parity check unit that compares a received parity bit with a parity calculated from received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data in character units.
- Reference numeral 3005 denotes a reception buffer status flag indicating that when the capacity of the reception buffer 304 becomes full, no more reception data can be stored.
- Reference numeral 360 denotes an overrun inspection unit as overrun detection means of the present invention, which detects reception overrun based on the reception buffer status flag 305.
- Reference numeral 309 denotes an overrun detection counter that counts the number of continuous retransmission requests in receiving the same data.
- Reference numeral 310 denotes a retry count register as the retransmission request count register according to the present invention, which defines the upper limit of the number of consecutive retransmission requests in receiving the same data.
- Reference numeral 311 denotes a comparison unit for comparing the value of the overrun detection counter 309 with the value of the retry number register 310.
- Reference numeral 1101 denotes a pull-up resistor that switches the signal level of a data terminal (not shown) to High or Low.
- the CPU 101 sets, in the retry count register 310, the upper limit of the number of consecutive retransmission requests in receiving data of the same content transmitted from the IC card 109.
- the data sent from the IC card 109 is received by the serial Z parallel converter 302.
- the parity check unit 303 checks whether the parity calculated from the 8 bits of the received data matches the received parity. If the parities do not match, the retransmission request signal generation unit 104 is notified and sends a retransmission request signal to the IC card 109. If the parities match, the received data is sent to the overrun checking unit 310.
- the overrun checking unit 303 checks the reception buffer status flag 305, discards the received data if the reception buffer status flag 305 is set, and generates the retransmission request signal generation unit 104. Causes the IC card 109 to send a retransmission request signal.
- the receive buffer status flag 305 is set only when the receive buffer 304 cannot store any more received data.
- the above operation is the same as the operation of the first embodiment, however, in this embodiment, when the overrun checking unit 303 detects a reception overrun in one data reception operation, The value of the overrun detection counter 309 is incremented by 1. If the overrun inspection unit 306 does not detect a reception overrun, the value of the overrun detection power counter 309 is reset. .
- the comparison unit 311 compares the value of the overrun detection counter 309 with the value of the retry count register 310, and determines the value of the overrun detection counter 310 as the value of the retry count register 310. If the overrun check unit 306 detects a reception overrun, the retransmission request signal generation unit 104 is notified so as not to request retransmission.
- FIG. 5 is a system diagram of an IC card connection device according to Embodiment 5 of the present invention.
- the IC card connection device according to the present embodiment is an IC card If the receive buffer that temporarily stores the data sent from 109 cannot store the received data anymore, a retransmission request signal is sent to the IC card 109 to receive the same data. If the specified number of consecutive retransmission requests has reached the specified number of times, a retransmission request signal is not sent, and a function is provided to notify that the specified number of consecutive retransmission requests for receiving the same data has been reached. It is.
- 140 is an IC card connection device
- 100 is an n CPU
- 109 is an IC card.
- reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- Reference numeral 203 denotes a parallel-to-serial conversion unit that serially transmits a start bit, transmission data 8 bits, and a parity bit.
- Reference numeral 104 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial-to-z-parallel converter as receiving means of the present invention for receiving data transmitted serially from the IC card 109.
- a parity check unit 303 compares the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data in character units.
- Reference numeral 3005 denotes a reception buffer status flag indicating that when the reception buffer capacity becomes full, no more reception data can be stored.
- Reference numeral 306 denotes an overrun detection unit that detects a reception overrun.
- Reference numeral 309 denotes an overrun detection counter that counts the number of consecutive retransmission requests in receiving the same data.
- Reference numeral 310 denotes a retry count register that defines the upper limit of the number of consecutive retransmission requests in receiving the same data.
- 3 1 1 is the ratio that compares the value of the overrun detection counter 3 09 with the value of the retry count register 3 10 It is a comparison department.
- Reference numeral 312 denotes a retry status register as a retransmission request status register of the present invention, which indicates that the number of consecutive retransmission requests in receiving the same data has reached the value set in the retry count register 310.
- 1101 is a pull-up resistor that switches the signal level of the data terminal (not shown) to High or Low.
- the CPU 101 sets, in the retry count register 310, the upper limit of the number of consecutive retransmission requests in receiving data of the same content transmitted from the IC card 109.
- the parity check unit 303 checks whether the parity calculated from the received data of 8 bits matches the received parity. If the parities do not match, the retransmission request signal generation unit 104 is notified and sends a retransmission request signal to the IC card 109. If the parities match, the received data is sent to the overrun detection unit 303.
- the overrun detection unit 303 detects the reception buffer status flag 305, and if the reception buffer status flag 305 is set, discards the received data, and the retransmission request signal generation unit 1 04 sends a retransmission request signal to the 1C card 109.
- the reception buffer status flag 305 is set only when the reception buffer 304 cannot store any more received data.
- the overrun detection counter 309 is reset when data is received, when the overrun detection unit 306 does not detect a reception overrun, and is reset when a reception overrun is detected. 1 is added. Comparison section 3 1 1 is the value of overrun detection counter 3 09 And the value of the retry count register 310 are compared.If the value of the overrun detection counter 310 reaches the value of the retry count register 310, retransmission is performed even if a receive overrun is detected. Is notified to the retransmission request signal generation unit 104 so as not to request the retransmission request.
- the operation of one-time data reception is compared with the operation of the overrun detection counter 309 by comparing the comparison unit 11.
- the retry status register 312 is set. This allows the CPU 1 • 1 side to know the number of retransmission requests based on the reception overrun during data reception from the IC card.
- FIG. 6 is a system diagram of an IC card connection device according to Embodiment 6 of the present invention.
- the IC card connection device according to the present embodiment when receiving the data sent from the IC card 109, detects the signal level Low during the character protection period of the received data, and the IC card 109 Has the function of requesting retransmission and receiving the same data again.
- reference numeral 150 denotes an IC card connection device, 10 UCP U, and 109 a IC card.
- reference numeral 210 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- Reference numeral 203 denotes a parallel Z-serial converter that serially transmits a start bit, 8-bit transmission data, and a parity bit.
- Reference numeral 105 denotes a retransmission request signal generation unit which issues a retransmission request signal to the IC card 109, and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- 3 0 2 is an IC card This is a serial / parallel converter as receiving means of the present invention for receiving data transmitted serially from 109.
- Reference numeral 401 denotes a frame inspection unit as a signal level inspection unit of the present invention, which inspects a signal level during a character protection period.
- Reference numeral 303 denotes a parity detection unit that compares a received parity bit with a parity calculated from received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data.
- Reference numeral 1101 denotes a pull-up resistor which switches the signal level of a data terminal (not shown) to High or Low.
- FIG. 14 is a diagram for explaining received data for one character and a signal level in a character protection period in the IC card connection device according to the present embodiment.
- the transmission side data 140 0 0 and the reception side data 140 1 0 are different from each other due to a difference in transmission rate.
- the transmission data side data 8-bit 1442 is different from the reception data side data 8-bit 1442.
- the frame inspection unit 401 sets the character protection period immediately after the received data of one character, that is, the two bits after the parity bit 1413 of the received data 1414. Check the signal level of 0. If the signal level Low is not detected during the character protection period, the received data is sent to the parity check unit 303.
- the character protection period provided between them is a minimum of 1 etu (e 1 electron time unit) and a maximum of 2 etu as in a character protection period 1404 immediately after the transmission data 1400 shown in FIG.
- the signal level during this period is High, but the whole or part of the character protection period 1420 immediately after the received data 1401 is Low due to the difference in transmission rate. ing.
- the frame detection unit 401 detects the Low signal level and discards the data.
- the detection result is notified to the retransmission request signal generation unit 105, and the retransmission request signal generation unit 105 sends a retransmission request signal to the IC card 109.
- the retransmission request signal generation unit 105 Upon receiving the input from the frame inspection unit 401, the retransmission request signal generation unit 105 receives the input from the frame inspection unit 401 and, based on this, transmits data having the same character as the data once received from the IC card 109. A retransmission request signal is output to IC card 109.
- the IC card 109 retransmits data of the same character as the previously transmitted data.
- the parity check unit 303 checks whether the parity calculated from the received data 8 bits matches the received parity. If the parities do not match, the retransmission request signal generation unit 105 is notified, and the retransmission request signal generation unit 105 sends a retransmission request signal to the IC card 109. If the parities match, the received data is stored in the reception buffer 304.
- frame detecting section 401 checks the character protection period of data, and confirms that the signal level during that period is Low. And a retransmission request signal generator With the use of 105, once received data is retransmitted from the IC card 109, necessary data can be re-received even if an error occurs in the transmission rate.
- FIG. 7 is a system diagram of an IC card connection device according to a seventh embodiment of the present invention.
- 160 is an IC card connection device, 10 UCPU, and 109 is an IC card.
- 101 is a CPU.
- Reference numeral 201 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- 203 is the start bit, the transmitted data is 8 bits, and no. This is a parallel Z-to-serial conversion unit that transmits the serial bit serially.
- Reference numeral 106 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 301 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial Z-parallel conversion unit that receives data transmitted serially from the IC card 109.
- Reference numeral 401 denotes a frame inspection unit that inspects a signal level during the character protection period as signal level inspection means of the present invention.
- Reference numeral 303 denotes a parity check unit that compares the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data.
- 1101 is a pull-up resistor, and a data terminal (not shown) Switch the signal level to High or Low.
- the CPU 101 transmits the IC card 109 by exchanging the 1 (: card with the 109) specified by IE CZ ISO 77816.
- the received data is sent to the parity detection unit 303.
- the retransmission request signal generation unit 106 is notified, and the retransmission request signal generation unit 106 sets the PTS flag 307 to IC.
- a retransmission request signal is sent to the card 109.
- the parity check unit 303 checks whether the parity calculated from the received data of 8 bits matches the received parity. If the parities do not match, the retransmission request signal generation unit 106 is notified, and the retransmission request signal generation unit 106 retransmits the IC card 109 if the PTS flag 307 is set. Sends a transmission request signal. If the parities match, the received data is stored in the reception buffer 304.
- FIG. 8 is a system diagram of an IC card connection device according to Embodiment 8 of the present invention.
- the IC card connection device according to the present embodiment when receiving data sent from the IC card 109, detects the signal level L 0 w during the character protection period of the received data, and It has a function to send a retransmission request, receive the same data again, and notify of frame error detection.
- 170 is an IC card connection device
- 10 is a U CPU
- 109 is an IC card.
- reference numeral 210 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- Reference numeral 203 denotes a parallel Z-serial conversion unit that serially transmits a start bit, transmission data of 8 bits, a no bit, and a parity bit.
- Reference numeral 105 denotes a retransmission request signal generation unit which issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial / Z-parallel conversion unit as reception means of the present invention for receiving data serially transmitted from the IC card 109.
- Reference numeral 401 denotes a frame inspection unit as signal level detection means of the present invention, which inspects the signal level during the character protection period.
- Reference numeral 303 denotes a parity check unit for comparing the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data.
- Reference numeral 402 denotes a frame violation flag indicating detection of a frame error.
- Reference numeral 1101 denotes a pull-up resistor which switches the signal level of a data terminal (not shown) to High or Low.
- the retransmission request signal generation unit 105 is notified and sends a retransmission request signal to the IC card 109.
- the frame inspection unit 401 detects the signal level Low
- the frame violation flag 402 is set. Set. The state of the frame violation flag 402 is checked by the CPU 101, whereby the CPU 101 can know that a frame violation has occurred while receiving data from the IC card.
- FIG. 9 is a system diagram of an IC card connection device according to Embodiment 9 of the present invention.
- the IC card connection device when receiving data sent from IC card 109, When the signal level L 0 w is detected during the protection period, a retransmission request signal is sent to the IC card 109, and if the number of consecutive retransmission requests for the same data reception reaches the specified number, a retransmission request is issued. It has the function of not sending a signal.
- 180 is an IC card connection device
- 10 is a U3 ⁇ 4CPU
- 109 is an IC card.
- reference numeral 101 denotes a CPU.
- Reference numeral 201 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- 203 is the start bit, the transmitted data is 8 bits, and no. This is a parallel Z-to-serial conversion unit that transmits the serial bit serially.
- Reference numeral 107 denotes a retransmission request signal generation unit as retransmission request means of the present invention for issuing a retransmission request signal to the IC card 109.
- Reference numeral 310 denotes a transmission / reception switching unit that switches between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial / Z-parallel converter for receiving data transmitted serially from the IC card 109.
- Reference numeral 401 denotes a frame inspection unit that inspects a signal level during the character protection period as signal level inspection means of the present invention.
- Reference numeral 303 denotes a parity checker that compares the received parity bit with the parity calculated from the received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data.
- 403 is a frame violation detection counter that counts the number of consecutive retransmission requests in receiving the same data.
- Reference numeral 310 denotes a retry count register as the retransmission request count register of the present invention, which defines the upper limit of the number of consecutive retransmission requests in receiving the same data.
- Reference numeral 311 denotes a comparison unit for comparing the value of the frame violation detection counter 309 with the value of the retry count register 310.
- Reference numeral 1101 denotes a pull-up resistor which switches the signal level of a data terminal (not shown) to High or Low.
- the CPU 101 sets, in the retry count register 310, the upper limit of the number of consecutive retransmission requests in receiving data of the same content transmitted from the IC card 109.
- the data sent from the IC card 109 is received by the serial Z parallel converter 302. Subsequently, the signal level during the character protection period is checked by the frame detecting unit 401. If no signal level is detected during the character protection period, the received data is sent to the parity check section 303. When the signal level Low is detected during the character protection period, the retransmission request signal generation unit 107 is notified and sends a retransmission request signal to the IC card 109.
- the above operation is the same as that of the first embodiment.
- the value is added to the violation detection counter 403, and the value of the frame violation detection counter 403 is reset when the frame inspection unit 401 does not detect a frame error.
- the comparison unit 311 compares the value of the frame violation detection counter 4 03 with the value of the retry count register 3 10, and sets the value of the frame violation detection counter 4 3 0 to the value of the retry count register 3 10. In this case, even when the frame detecting unit 401 detects a frame error, the retransmission request signal generating unit 104 is notified not to request retransmission.
- FIG. 10 is a system diagram of an IC card connection device according to Embodiment 10 of the present invention.
- the IC force connection device in the present embodiment When receiving the data sent from the node 109, if a signal level Low is detected during the character protection period of the received data, a retransmission request signal is sent to the IC card 109, If the number of consecutive retransmission requests for receiving the same data has reached the specified number of times, a function to notify that the number of consecutive retransmission requests for the reception of the same data has reached the specified number of times is not sent.
- a function to notify that the number of consecutive retransmission requests for the reception of the same data has reached the specified number of times is not sent.
- reference numeral 190 denotes an IC card connection device
- 10 denotes a Ui CPU
- 109 denotes an IC card.
- reference numeral 201 denotes a transmission buffer for temporarily storing transmission data.
- Reference numeral 202 denotes a parity generation unit that generates a parity bit from transmission data.
- 203 is the start bit, the transmitted data 8 bits, and no. This is a parallel Z-to-serial conversion unit that transmits the priority bits serially.
- Reference numeral 107 denotes a retransmission request signal generation unit that issues a retransmission request signal to the IC card 109 and serves as retransmission request means of the present invention.
- Reference numeral 310 denotes a transmission / reception switching unit for switching between data transmission to the IC card 109 and data reception from the IC card 109.
- Reference numeral 302 denotes a serial-to-Z-parallel conversion unit that receives data serially transmitted from the IC card 109 and serves as a receiving unit of the present invention.
- Reference numeral 401 denotes a frame inspection unit that inspects a signal level during the character protection period as signal level detection means of the present invention.
- Reference numeral 303 denotes a parity check unit that compares a received parity bit with a parity calculated from received data.
- Reference numeral 304 denotes a reception buffer for temporarily storing received data.
- Reference numeral 403 is a frame violation detection counter that counts the number of consecutive retransmission requests in receiving the same data.
- Reference numeral 310 denotes a retry count register that defines the upper limit of the number of consecutive retransmission requests in receiving the same data.
- a comparison unit 311 compares the value of the frame violation detection power counter 4 03 with the value of the retry count register 3 10.
- 3 1 2 is the same.
- Reference numeral 1101 denotes a pull-up resistor, which switches the signal level of a data terminal (not shown) to High or Low.
- the CPU 101 sets, in the retry count register 310, the upper limit of the number of consecutive retransmission requests in receiving data of the same content transmitted from the IC card 109.
- the data sent from the IC card 109 is received by the serial Z parallel converter 302. Subsequently, the signal level during the character protection period is checked by the frame detecting unit 401. If the signal level Low is not detected during the character protection period, the received data is sent to the parity check unit 303. If the signal level Low is detected during the character protection period, the retransmission request signal generation unit 107 is notified and sends a retransmission request signal to the IC card 109.
- the frame violation detection power counter 403 is reset when data is received, if no frame error is detected by the frame inspection unit 401, and the value is incremented by 1 when a frame error is detected. You.
- the comparator 311 1 compares the value of the frame violation detection power counter 4 03 with the value of the retry count register 3 10, and the value of the frame violation detection counter 4 3 3 is the value of the retry count register 3 10. Retransmission so that retransmission is not requested even if a frame error is detected. Notification request signal generation unit 107 is notified.
- the operation of one data reception is performed by comparing the frame violation detection power counter 400 3 with the comparison unit 11.
- the retry status register 312 is set.
- the CPU 101 can know the number of retransmission requests based on frame errors during data reception from the IC card.
- the IC card connection device performs one operation.
- the data to be processed is in units of characters, this is merely an example, and the processing may be performed based on an arbitrary processing unit.
- the 8-bit data part in the present embodiment is an example, The size can be larger or smaller than 8 bits.
- the symmetry inspected by the signal level inspection means of the present invention may be longer or shorter than the character protection period 2 etu shown in the embodiment.
- the signal level checking means of the present invention checks a signal size at an arbitrary point in a predetermined period after a reception period for receiving data including a data body, a start bit, and a parity bit. Is also good.
- the present invention provides all or some of the functions of all or some of the means of the present invention.
- a medium that carries a program and Z or data to be executed by a computer The medium is readable by a computer, and the read program and Z or data execute the function in cooperation with the computer. It can be realized as a medium.
- the present invention also relates to all or some of the above-described aspects of the present invention.
- data means data structure, data format
- the medium includes a recording medium such as a ROM, a transmission medium such as the Internet, and a transmission medium such as light, radio waves, and sound waves. Further, the carried medium includes, for example, a recording medium on which a program and / or data is recorded, a transmission medium for transmitting the program and / or data, and the like.
- processors means, for example, a recording medium such as a ROM, which can be read by a computer, and a transmission medium, for example, a program and a program to be transmitted.
- a recording medium such as a ROM
- a transmission medium for example, a program and a program to be transmitted.
- data can be handled by a computer as a result of transmission, and information aggregates include, for example, programs and / or software such as data.
- the configuration of the present invention may be realized by software or hardware.
- retransmission is performed by using a function of detecting a frame error or a reception overrun that cannot be detected by a conventional IC card connection device and requesting retransmission when a parity error is detected.
- a function of detecting a frame error or a reception overrun that cannot be detected by a conventional IC card connection device and requesting retransmission when a parity error is detected.
- the present invention can reliably receive data even when the capacity of the receiving buffer is small, It has the advantage that the detection rate of transmission errors can be improved and more reliable data transmission can be realized.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Credit Cards Or The Like (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00948350A EP1215564B1 (en) | 1999-08-02 | 2000-08-01 | Ic card reader |
| US10/069,094 US6779724B1 (en) | 1999-08-02 | 2000-08-01 | IC card reader and method |
| DE60031428T DE60031428T2 (de) | 1999-08-02 | 2000-08-01 | Ic kartenleser |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21911899A JP3522597B2 (ja) | 1999-08-02 | 1999-08-02 | Icカード接続装置 |
| JP11/219118 | 1999-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001009709A1 true WO2001009709A1 (en) | 2001-02-08 |
Family
ID=16730537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/005154 Ceased WO2001009709A1 (en) | 1999-08-02 | 2000-08-01 | Ic card connector |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6779724B1 (ja) |
| EP (1) | EP1215564B1 (ja) |
| JP (1) | JP3522597B2 (ja) |
| DE (1) | DE60031428T2 (ja) |
| WO (1) | WO2001009709A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10261314B2 (en) | 2012-08-04 | 2019-04-16 | Johnson Controls Gmbh | Head-up display |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001099038A1 (de) * | 2000-06-20 | 2001-12-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V. | Steuerung der kommunikation bei zugriffs- und zugangskontrollsystemen |
| JP4622238B2 (ja) * | 2003-11-19 | 2011-02-02 | 富士ゼロックス株式会社 | 画像形成装置 |
| JP2005258526A (ja) * | 2004-03-09 | 2005-09-22 | Nec Saitama Ltd | 卓上ホルダ及び携帯端末機器システム |
| KR100885869B1 (ko) * | 2006-04-04 | 2009-02-27 | 삼성전자주식회사 | 프리엠블 코드를 사용하여 노이즈를 감소시키는 단일형병렬데이터 인터페이스 방법, 기록매체 및 반도체 장치 |
| JP5310348B2 (ja) * | 2009-07-17 | 2013-10-09 | ソニー株式会社 | 受信装置、受信方法、プログラム、及び送信装置 |
| JP5216731B2 (ja) * | 2009-09-17 | 2013-06-19 | 東芝テック株式会社 | 無線タグ読取装置、無線タグ読取プログラム |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54108504A (en) * | 1978-02-13 | 1979-08-25 | Matsushita Electric Ind Co Ltd | Data transmission system on start-stop system |
| JPS63126083A (ja) * | 1986-11-14 | 1988-05-30 | Toshiba Corp | Icカード |
| JPH07170253A (ja) * | 1993-12-15 | 1995-07-04 | Nec Corp | 調歩同期不正回復方式 |
| JPH088995A (ja) * | 1994-06-20 | 1996-01-12 | Nec Corp | データ通信端末装置および再送タイマ制御方法 |
| JPH09179948A (ja) * | 1995-12-22 | 1997-07-11 | Sony Corp | Icカードインタフェース装置 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69431794T2 (de) * | 1993-09-10 | 2003-07-03 | Oki Electric Industry Co., Ltd. | LESE-/SCHREIBVORRICHTUNG FüR EINE IC-KARTE UND STEUERVERFAHREN DAFüR |
| JP3201157B2 (ja) * | 1994-07-26 | 2001-08-20 | 松下電器産業株式会社 | Icカード装置 |
| EP0838780B1 (en) * | 1996-05-09 | 2005-05-04 | Citizen Watch Co., Ltd. | Storage medium system using contactless memory card |
| JP3486057B2 (ja) * | 1996-06-21 | 2004-01-13 | 株式会社東芝 | 半導体集積回路及び接触式icカード |
| KR19980081575A (ko) * | 1997-04-21 | 1998-11-25 | 윤종용 | 외부 입력 전압의 레벨 조정이 가능한 스마트카드 |
-
1999
- 1999-08-02 JP JP21911899A patent/JP3522597B2/ja not_active Expired - Fee Related
-
2000
- 2000-08-01 US US10/069,094 patent/US6779724B1/en not_active Expired - Fee Related
- 2000-08-01 WO PCT/JP2000/005154 patent/WO2001009709A1/ja not_active Ceased
- 2000-08-01 EP EP00948350A patent/EP1215564B1/en not_active Expired - Lifetime
- 2000-08-01 DE DE60031428T patent/DE60031428T2/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54108504A (en) * | 1978-02-13 | 1979-08-25 | Matsushita Electric Ind Co Ltd | Data transmission system on start-stop system |
| JPS63126083A (ja) * | 1986-11-14 | 1988-05-30 | Toshiba Corp | Icカード |
| JPH07170253A (ja) * | 1993-12-15 | 1995-07-04 | Nec Corp | 調歩同期不正回復方式 |
| JPH088995A (ja) * | 1994-06-20 | 1996-01-12 | Nec Corp | データ通信端末装置および再送タイマ制御方法 |
| JPH09179948A (ja) * | 1995-12-22 | 1997-07-11 | Sony Corp | Icカードインタフェース装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP1215564A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10261314B2 (en) | 2012-08-04 | 2019-04-16 | Johnson Controls Gmbh | Head-up display |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60031428D1 (de) | 2006-11-30 |
| US6779724B1 (en) | 2004-08-24 |
| EP1215564A1 (en) | 2002-06-19 |
| EP1215564B1 (en) | 2006-10-18 |
| DE60031428T2 (de) | 2007-03-08 |
| EP1215564A4 (en) | 2004-09-01 |
| JP2001043324A (ja) | 2001-02-16 |
| JP3522597B2 (ja) | 2004-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6141784A (en) | Method and system in a data communications system for the retransmission of only an incorrectly transmitted portion of a data packet | |
| US4710871A (en) | Data transmitting and receiving apparatus | |
| EP1424799B1 (en) | System and method for detecting lost messages transmitted between modules in a communication device | |
| KR20040037209A (ko) | 손실된 패킷들을 검출하는 방법 | |
| JP2015027100A (ja) | パケット通信の伝送制御方法及びパケット通信システム | |
| JPH0795767B2 (ja) | データ通信の最適化された方法と、その方法を使用するシステム | |
| US20110041025A1 (en) | Method of communication, in particular with capability of frame abortion or retransmission indication, between a transmitter and a receiver based on frames and corresponding communication node | |
| WO2024169301A1 (zh) | 数据重传方法、电子设备及计算机可读存储介质 | |
| US7701846B2 (en) | Bad data packet capture device | |
| WO2001009709A1 (en) | Ic card connector | |
| JPH0419731B2 (ja) | ||
| CN109039552A (zh) | 一种数据恢复方法及装置 | |
| CN103647619A (zh) | 一种电力终端变数据帧长的发送、接收方法及装置 | |
| US6049902A (en) | Method and system in a data communications system for the establishment of multiple, related data links and the utilization of one data link for recovery of errors detected on another link | |
| CN114095117A (zh) | 一种以太网错误帧的重传方法及相关装置 | |
| JP3433180B2 (ja) | 送信装置及び通信システム | |
| CN119011701A (zh) | 一种基于改进的usart协议的数据传输方法 | |
| CN114666007B (zh) | Uart通信方法、装置、设备及存储介质 | |
| CN111008172A (zh) | 一种接口通讯协议栈 | |
| CN115412890B (zh) | 一种数据传输方法、装置和终端设备 | |
| CN119766257B (zh) | 发送端、接收端和通讯设备 | |
| JPS609240A (ja) | 通信制御装置 | |
| WO2008052483A1 (fr) | Procédé et appareil de compression de données et système de rétroaction de demande automatique de répétition | |
| CN114244485B (zh) | 一种usb信号远距离传输时的数据管理方法 | |
| JP2000312201A (ja) | 通信装置および誤り制御方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
| WWE | Wipo information: entry into national phase |
Ref document number: 2000948350 Country of ref document: EP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 10069094 Country of ref document: US |
|
| WWP | Wipo information: published in national office |
Ref document number: 2000948350 Country of ref document: EP |
|
| WWG | Wipo information: grant in national office |
Ref document number: 2000948350 Country of ref document: EP |