Abstract:
A noncontact reader/writer is disclosed which performs, at a high speed, a processing of communication, such as read or write, with a plurality of noncontact information carriers such as noncontact IC cards. A transmitting unit transmits signals, such as commands, to the respective kinds of noncontact information carriers. A memory stores information about at least one of the kinds of noncontact information carriers with which the noncontact reader/writer communicated. A control unit decides, based on the stored information, the priority of the kinds of noncontact information carries in the communication processing and performs a communication processing. The stored information includes the kinds of noncontact information carriers or the number of occurences of communication with the respective kinds of noncontact information carriers.

Description:
TECHNICAL FIELD  
         [0001]    The present invention relates to a noncontact reader/writer for reading and writing a noncontact information carrier, particularly to a reader/writer for a noncontact integrated circuit (IC) information carrier.  
         BACKGROUND ART  
         [0002]    The noncontact IC information carrier maintains higher security and abrasion-resistance than a magnetic information carrier. Therefore, the noncontact IC information carrier is used, for example, as a commuter pass in a wicket of a station or as a point information carrier in a gas station, instead of a magnetic information carrier such as a magnetic stripe card.  
           [0003]    However, there are varieties of noncontact IC information carriers including at least several kinds which are standardized in International Standardization Organization (ISO). In places that various kinds of noncontact IC information carriers are supposed to be used, a noncontact-IC-information-carrier reader/writer (hereinafter called reader/writer) capable of information communication processing such as reading and writing, with plural kinds of noncontact IC information carriers is recommended to be used.  
           [0004]    Herein, type A represents ISO 14443 type A compliant information carrier, type B represents ISO 14443 type B compliant information carrier and type C represents ISO 15693 compliant information carrier. Each of them complies with different communication protocol.  
           [0005]    [0005]FIG. 22 shows conventional reader/writer  101 . Transmitter  102  sends a command signal to information carrier. Receiver  103  receives a response signal from information carrier.  
           [0006]    Informing unit  107  informs controller  108  that a noncontact IC information carrier enters into a communication range of reader/writer  101 . Then, controller  108 , responsive to the information from informing unit  107 , allows transmitter  102  to send a command to the noncontact IC information carrier.  
           [0007]    Controller  108  allows power supply  109  to energize every unit constituting reader/writer  101 , when receiving the response through receiver  103 . Informing unit  107  is realized with a motion sensor capable of detecting a movement of the noncontact IC information carrier.  
           [0008]    The motion sensor, as informing unit  107 , detects the noncontact IC information carrier entering in the communication range of reader/writer  101 , and informs it controller  108 . Controller  108  starts communication processing, upon receiving the information from informing unit  107 .  
           [0009]    As shown in FIG. 23, controller  108  first communicates with an object in the communication range as a type A noncontact IC information carrier (S 301 ). When failed in the communication with a type A noncontact IC information carrier, next, controller  108  communicates with the object as a type B noncontact IC information carrier (S 302 ). Similarly, when failed in reading responses as a type B noncontact IC information carrier, then controller  108  communicates with the object as a type C noncontact IC information carrier (S 303 ).  
           [0010]    In the above-mentioned prior art, even if a noncontact IC information carrier being in the communication range of reader/writer  101  is a type C noncontact IC information carrier, first reader/writer starts communication with an information carrier in the communication range as a type A noncontact IC information carrier. Next, the reader/writer communicates with the noncontact IC information carrier as a type B information carrier. After that, the reader/writer communicates with the noncontact IC information carrier as a type C noncontact IC information carrier. Accordingly, in some cases, it takes long time for the reader/writer to complete the communication after receiving an instruction to start the communication.  
           [0011]    In addition, in the case of battery powered noncontact IC information carrier reader/writer, the long communication time shortens a total operation time of the battery.  
         DISCLOSURE OF THE INVENTION  
         [0012]    The present invention aims at providing a device to shorten communication time of a noncontact reader/writer with a noncontact information carrier.  
           [0013]    A noncontact reader/writer of the present invention can communicate with each of plural kinds of noncontact information carriers. A transmitter sends signals such as a command to each of plural kinds of noncontact information carriers. Receiver receives signals such as a response from each of plural kinds of noncontact information carriers. A memory stores information on a kind of at least one of plural kinds of noncontact information carriers with which the noncontact reader/writer has communicated.  
           [0014]    In communication processing, based upon the information, a controller determines a priority order on the kinds of the plural kinds of noncontact information carriers and carries out the communication processing.  
           [0015]    Moreover, the noncontact reader/writer disclosed in the present invention includes a priority memory which stores a priority table to indicate a priority order on the kinds of the plural kinds of noncontact information carriers. Herein, the afore-mentioned priority memory stores a pointer value which represents a specific priority order in the priority table. Then, the controller determines the pointer value according to each kind of the plural kinds of noncontact information carriers with which the noncontact reader/writer has communicated. Moreover, in the next occasion of communication, the controller carries out communication responsive to the priority order indicated by the pointer value.  
           [0016]    Moreover, in a noncontact reader/writer in another exemplary embodiment, the above-mentioned memory stores, as a communication times memory, a number of communication times with the noncontact reader/writer in each kind of plural kinds of noncontact information carriers. When communication processing, the controller carries out communication, while determining the priority order based on the contents of the communication times memory.  
           [0017]    As described above, the noncontact reader/writer in the present invention carries out speedy communication processing by communications with the noncontact information carrier based on the priority order on the kind of noncontact information carrier.  
           [0018]    In addition, in a communication system in the present invention, an above-mentioned noncontact reader/writer communicates with a plurality of servers.  
           [0019]    Moreover, in a management system in the present invention, an above-mentioned noncontact reader/writer works for sorting articles. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0020]    [0020]FIG. 1 is a block diagram of a functional configuration of a noncontact-IC-information-carrier reader/writer (hereinafter called reader/writer) in the first exemplary embodiment of the present invention.  
         [0021]    [0021]FIG. 2 is a schematic view of a communication priority table of a reader/writer used in the first exemplary embodiment of the present invention.  
         [0022]    [0022]FIG. 3 is a schematic front view of a communication enable/inhibit setting unit of a reader/writer in the first exemplary embodiment of the present invention.  
         [0023]    [0023]FIG. 4 is a flowchart of communication processing of a reader/writer used in the first exemplary embodiment of the present invention.  
         [0024]    [0024]FIG. 5 is a flowchart of communication processing of a reader/writer in the first exemplary embodiment of the present invention.  
         [0025]    [0025]FIG. 6 is a flowchart of communication processing of a reader/writer in the first exemplary embodiment of the present invention.  
         [0026]    [0026]FIG. 7 is a flowchart of communication processing of a reader/writer in the first exemplary embodiment of the present invention.  
         [0027]    [0027]FIG. 8 is a flowchart of communication processing of a reader/writer in the first exemplary embodiment of the present invention.  
         [0028]    [0028]FIG. 9 is a flowchart of communication processing of a IC-information-carrier reader/writer in the first exemplary embodiment of the present invention.  
         [0029]    [0029]FIG. 10 is a flowchart of communication processing of a reader/writer in the first exemplary embodiment of the present invention.  
         [0030]    [0030]FIG. 11 is a block diagram of a functional configuration of a reader/writer in the second exemplary embodiment of the present invention.  
         [0031]    [0031]FIG. 12 is a schematic view of a configuration of a communication times memory of a reader/writer in the second exemplary embodiment of the present invention.  
         [0032]    [0032]FIG. 13 is a flowchart of communication processing of a noncontact IC-information-carrier reader/writer in the second exemplary embodiment of the present invention.  
         [0033]    [0033]FIG. 14 is a flowchart of communication processing of a reader/writer in the second exemplary embodiment of the present invention.  
         [0034]    [0034]FIG. 15 is a flowchart of communication processing of a noncontact IC-information-carrier reader (hereinafter called reader) in the second exemplary embodiment of the present invention.  
         [0035]    [0035]FIG. 16 is a flowchart of communication processing of a reader in the second exemplary embodiment of the present invention.  
         [0036]    [0036]FIG. 17 is a flowchart of communication processing of a reader in the second exemplary embodiment of the present invention.  
         [0037]    [0037]FIG. 18 is a flowchart of communication processing of a reader in the second exemplary embodiment of the present invention.  
         [0038]    [0038]FIG. 19 is a flowchart of communication processing of a reader in the second exemplary embodiment of the present invention.  
         [0039]    [0039]FIG. 20 is a flowchart of communication processing of a reader in the second exemplary embodiment of the present invention.  
         [0040]    [0040]FIG. 21A and FIG. 21B are block diagrams of information communication systems in the third exemplary embodiment of the present invention.  
         [0041]    [0041]FIG. 22 is a schematic view of a management system in the fourth exemplary embodiment of the present invention.  
         [0042]    [0042]FIG. 23 is a block diagram for showing an example of the structure of conventional reader/writers.  
         [0043]    [0043]FIG. 24 is a flowchart of communication processing of a conventional reader/writer. 
     
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS  
       [0044]    The present invention is explained by the following exemplary embodiments. A noncontact reader/writer (hereinafter called reader/writer) for reading and writing a noncontact information carrier such as a noncontact integrated circuit (IC) information carrier is mainly described. Moreover, these embodiments are applicable to noncontact information carriers such as a noncontact IC card and a noncontact IC information carrier, and a reader/writer thereof. Herein, the noncontact IC information carrier is not limited to card-shaped only.  
       FIRST EXEMPLARY EMBODIMENT  
       [0045]    A noncontact IC information carrier reader/writer in the first exemplary embodiment of the present invention is described with reference to FIG. 1 through FIG. 10.  
         [0046]    [0046]FIG. 1 is a block diagram showing functional configurations of a noncontact reader/writer for noncontact-IC-information-carrier in the first exemplary embodiment of the present invention. FIG. 2 illustrates a schematic view of a communication priority table of a reader/writer. FIG. 3 is a front view of a dual-in-line-package switch (DIP switch) employed as a communication enable/inhibit setting unit. FIG. 4 through  10  illustrate flowcharts of data processing when communications are made.  
         [0047]    [0047]FIG. 1 shows noncontact reader/writer  1  used in the first exemplary embodiment of the present invention. Transmitter  2  sends signals such as a command to an information carrier such as a noncontact IC card or a noncontact-IC-information-carrier. Receiver  3  receives a signal such as a response from the information carrier. Communication enable/inhibit setting unit  4  sets enabling or inhibiting a communication between the noncontact reader/writer and each kind of noncontact information carrier.  
         [0048]    Pointer memory  6  stores pointer values referring relevant lines in the communication priority table stored in communication priority memory  5 .  
         [0049]    Informing unit  7  informs controller  8  of a noncontact IC information carrier entering into an communication range of a noncontact reader/writer  1 .  
         [0050]    Controller  8 , then receiving the notification from informing unit  7 , determines a kind of noncontact IC information carrier to communicate with for next time, by using communication enable/inhibit setting unit  4 , communication priority table  5  and pointer memory  6 . Moreover, controller  8  allows transmitter  2  to send a command to the information carrier. When receiving the response through receiver  3 , controller  8  allows power supply  9  to energize each unit constituting the reader/writer.  
         [0051]    In the exemplary embodiment, a motion sensor works as informing unit  7  to detect a movement of the noncontact-IC-information-carrier. Lithium ion secondary battery works as power supply  9 .  
         [0052]    As shown in FIG. 2, the communication priority table includes communication priority pattern  21  and pointers  22  to show each pattern. For example, when pointer value is three, the communication priority means an order of types B, C and A. In the exemplary embodiment, suppose that the reader/writer can communicate with three kinds of noncontact-IC-information-carriers, i.e. type A, B and C. Herein, type A represents ISO 14443 type A compliant information carrier, type B represents ISO 14443 type B compliant information carrier and type C represents ISO 15693 compliant information carrier.  
         [0053]    As shown in FIG. 3, in the exemplary embodiment, communication enable/inhibit setting unit  4  employs a dual-in-line-package (DIP) switch.  
         [0054]    In an example shown in FIG. 3, as for switches, a topside switch position corresponds to a communication enable state, and a bottom side switch position corresponds to a communication inhibit state. Consequently, the reader/writer enables communication with a type A noncontact-IC-information-carrier, inhibits communication with type B, and enables communication with type C. FIGS. 4, 5,  6 ,  7 ,  8 ,  9  and  10  are flowcharts of data processing of controller  8 , in the communication.  
         [0055]    Suppose that a noncontact reader/writer communicates with a type C noncontact IC information carrier. First, a motion sensor as informing unit  7 , informs controller  8  that unit  7  detects a noncontact IC information carrier is in a communication range of reader/writer  1 . Controller  8 , at the beginning of communication processing, determines the priority order of communication by reading a pointer value stored in pointer memory  6  (S 101 ).  
         [0056]    Next, suppose that the pointer value stored in pointer memory  6  is 0. Then, processing goes to “A”, and according to the flow shown in FIG. 4, communication processing is carried out and the stored data in the pointer memory is rewritten.  
         [0057]    Suppose that communication enable/inhibit setting unit  4 , a DIP switch, is set as follows:  
         [0058]    for a noncontact-IC-information-carrier type A, the setting is in a communicate enable state,  
         [0059]    for a noncontact-IC-information-carrier type B, the setting is in a communication inhibit state, and  
         [0060]    for a noncontact-IC-information-carrier type C, the setting is in a communicate enable state.  
         [0061]    Herein, controller  8  reads a setting of communication enable/inhibit setting unit  4 . The setting is for enabling communication with type A (S 111 ).  
         [0062]    Then, assuming the noncontact-IC-information-carrier as type A, controller  8  allows transmitter  2  to send a command relevant to type A (S 112 ).  
         [0063]    Controller  8 , however, fails in communication since the noncontact IC information carrier being in the communication range of the reader/writer is type C ( 113 ).  
         [0064]    Next, controller  8  reads a setting of communication enable/inhibit setting unit  4 . Controller  8  does not communicate, since the setting is for inhibiting communication with type B (S 114 ).  
         [0065]    Next, controller  8  reads a setting of unit  4 . The setting is for enabling communication with type C (S 115 ). Then, assuming the noncontact-IC-information-carrier as type C, controller  8  allows transmitter  2  to send the command relevant to type C (S 116 ). Receiver  3  can receive the response from the information carrier since the noncontact IC information carrier in the communication range of reader/writer is a type C noncontact IC information carrier (S 117 ). After that, controller  8  stores a pointer value to determine a priority order for next communication, after finishing required communication processing, i.e., reading-in information from the information carriers, in this exemplary embodiment.  
         [0066]    In the present exemplary embodiment, pointer memory  6  stores a pointer value  4 , so that type C noncontact-IC-data-carrier just finished communication is at the first priority followed by type A and type B in order (S 118 ).  
         [0067]    Due to this processing, when the type C noncontact-IC-information-carrier enters into an communication range of reader/writer  1  in the next communication, the reader/ writer can perform a high speed read-in processing, since the type C noncontact-IC-information-carrier is assigned as the first priority order.  
         [0068]    Herein, as an example of how a noncontact IC information carrier is used, suppose that a company publishes a type B noncontact-IC-information-carrier with awards for payment. In such a case, the type B noncontact IC information carrier will be used more frequently than other types capable of payment. Type B noncontact IC information carrier, therefore, is assigned the first priority (pointer value=2). Accordingly the reader/writer of the present exemplary embodiment can perform processing in a shorter time with noncontact IC information carrier. That is, a speedy processing is implemented.  
         [0069]    As described above, when the pointer value of communication priority table  5  is 0, reader/writer  1  carries out communication processing based on the flow shown in FIG. 5.  
         [0070]    When the pointer value of communication priority table  5  is 1, processing goes to “B” in FIG. 4, i.e. to the flow shown in FIG. 6. Noncontact reader/writer  1  carries out communication processing based on the flow shown in FIG. 6 and rewrites data in the pointer memory.  
         [0071]    When the pointer value of communication priority table  5  is 2, data processing goes to “C” in FIG. 4, i.e. to the flow shown in FIG. 7.  
         [0072]    When the pointer value is 3, data processing goes to “D” in FIG. 4, i.e. to the flow shown in FIG. 8.  
         [0073]    When the pointer value is  4 , data processing goes to “E” in FIG. 4, i.e. to the flow shown in FIG. 9.  
         [0074]    Moreover, when the pointer value is not any one of 0 through 4, data processing goes to “F” in FIG. 4, i.e. to the flow shown in FIG. 10.  
         [0075]    As described above, after finishing the last communication, the noncontact reader/writer in the present exemplary embodiment determines the priority order for next communication, based upon data on the current priority order in the communication processing and on the kind of noncontact-IC-data-carrier with which the reader/writer has communicated. Accordingly, in next time, the noncontact reader/writer can carry out speedily the communication processing with a noncontact IC information carrier.  
         [0076]    In addition to the above, the reader/writer includes the communication enable/inhibit setting unit to provide enable or inhibit settings for each kind of noncontact information carrier. The reader/writer, therefore, can inhibit communication with unnecessary kind of noncontact information carrier. This further enables a speedy communication processing.  
         [0077]    Moreover, in the present exemplary embodiment, pointer memory  6  employs an Electrical Erasable Programming ROM (EEPROM), as a non-volatile memory. The unit can hold communication priority order kept unchanged for a next communication, even if power supply  9  stops. After recovery of power supply  9 , therefore, the reader/writer performs a speedy communication with the same kind of noncontact information carrier as the previous communication.  
         [0078]    In addition, in the present exemplary embodiment, power supply  9  employs Lithium ion secondary battery. A shortened communication time reduces power consumption of battery used for power supply  9 , thereby resulting a longer battery life. As a result, a longer continuous operating time is realized.  
         [0079]    Moreover, in the present exemplary embodiment, communication enable/inhibit setting unit  4  employs a DIP switch. Communication from other units or a predetermined noncontact IC information carrier for settings may be used to set enabling or inhibiting communication.  
         [0080]    Additionally, in the present exemplary embodiment, pointer memory  6  employs EEPROM. Other non-volatile memories such as Ferroelectric Random Access Memory (FeRAM) may also be used for the purpose.  
       SECOND EXEMPLARY EMBODIMENT  
       [0081]    The reader/writer in the second exemplary embodiment of the present invention is explained with reference to FIG. 11 through FIG. 20.  
         [0082]    [0082]FIG. 11 illustrates a block diagram of a functional configuration of a reader/ writer. FIG. 12 illustrates a schematic view of a configuration of a communication times memory of a reader/writer. FIG. 13 through FIG. 20 illustrate flowcharts of communication processing of reader/writers.  
         [0083]    The reader/writer in the second exemplary embodiment of the present invention can also communicate with three kinds of noncontact-IC-information-carriers, i.e. types A, B and C. Herein, type A represents ISO 14443 type A compliant information carrier, type B represents ISO 14443 type B compliant information carrier and type C represents ISO 15693 compliant information carrier.  
         [0084]    [0084]FIG. 11 shows reader/writer  11  in the second exemplary embodiment of the present invention. Transmitter  2  sends a command to the information carrier. Receiver  3  receives a response from the information carrier. Communication enable/inhibit setting unit  4  makes communication enable or inhibit settings to communicate with each kind of noncontact IC information carriers.  
         [0085]    Communication priority storing memory  12  stores a priority order within types A, B and C noncontact IC information carriers with which reader/writer  11  communicates.  
         [0086]    Communication times memory  13  stores a number of communication times of reader/writer  11  with respect to each kind of noncontact IC information carrier. Clearing unit  14  clears stored data in communication, times memory  13 . Informing unit  7  informs controller  8  of a noncontact-IC information-carrier entering into a communication range of reader/writer  11 .  
         [0087]    Controller  8 , upon receiving the information from informing unit  7 , determines a kind of noncontact-IC-information-carrier with which reader/writer  11  communicates in next time, by using communication enable/inhibit setting unit  4  and communication priority storing memory  12 . Additionally, controller  8  allows transmitter  2  to send a command to the information-carrier and receives a response through receiver  3 . Noticing unit  15  informs abnormality to the outside.  
         [0088]    Power supply  9  energizes each unit constituting reader/writer  11 . In this exemplary embodiment, a motion sensor is used for informing unit  7  and a Lithium ion secondary battery is used for power supply  9 .  
         [0089]    In addition, in this exemplary embodiment, like the first exemplary embodiment, communication enable/inhibit setting unit  4  employs a DIP switch as shown in FIG. 3.  
         [0090]    [0090]FIG. 12 shows a secured area in address  41  of communication times memory  13 .  
         [0091]    Area  42  stores a number of communication times with type A noncontact-IC-information-carrier. Area  43  stores a number of communication times with type B noncontact-IC-information-carrier. Area  44  stores a number of communication times with type C noncontact-IC-information-carrier.  
         [0092]    In this exemplary embodiment, each of areas  42 ,  43  and  44  secures an area of 4 bytes. In each communication, the number of communication times is increased by one for each kind of noncontact-IC-information-carriers. The each number is saved in area  42 ,  43  and  44  in binary value. Supposing that communication is made every one second, this 4 bytes area has enough capacity to count the communication times over 130 years. Check code  45  is provided to check whether data stored in communication times memory  13  are correct. In this exemplary embodiment, the exclusive OR (EOR) of each bytes, i.e. addresses +00 through +11 are used.  
         [0093]    In the present exemplary embodiment, communication times memory  13  employs an Electrical Erasable Programming ROM (EEPROM), which is a nonvolatile memory. Contents of the communication times memory can be kept unchanged, if power from power supply  9  stops.  
         [0094]    Moreover, in this second exemplary embodiment, controller  8  of reader/writer  11 , just after the start, reads out the contents of communication times memory  13  to detect validity of check code  45  for determining whether the information carrier is valid. If the check code is invalid, reader/writer  11  informs an abnormality to the outside by noticing unit  15 , after judging that there are a certain abnormalities in communication times memory  13 . In this second exemplary embodiment, the noticing unit employs a red Light Emitting Diode (LED) with a driving circuit. The red LED blinks at the time of abnormalities.  
         [0095]    [0095]FIGS. 13, 14,  15 ,  16 ,  17 ,  18 ,  19 ,  20  show flows of data processing of controller  8  in the communication.  
         [0096]    The settings of DIP switch as communication enable/inhibit setting unit  4 , are as follows:  
         [0097]    for a type A noncontact IC information carrier, the setting is in a communication enable state,  
         [0098]    for type B noncontact IC information carrier, the setting is in a communication inhibit state, and  
         [0099]    for type C noncontact IC information carrier, the setting is in a communication enable state.  
         [0100]    Suppose that numbers of communication times stored in communication times memory  13  for each kind of noncontact IC information carrier are ten (10) times for type A, three (3) times for type B and one (1) time for type C, respectively.  
         [0101]    In addition, if the priority order stored in communication priority storing memory  12  is in the order of type A, B and C, processing goes to “A” in FIG. 13, i.e. “A” in FIG. 14. And data processing is carried out according to the flow shown in FIG. 14,  
         [0102]    Similarly, the following data processing is carried out according to the priority order stored in communication priority storing memory  12 .  
         [0103]    In case of the priority order of A, C and B, processing goes to “B” in FIG. 13, i.e. “B” in FIG. 15. Data processing is carried out according to the flow shown in FIG. 15.  
         [0104]    In case of the priority order of B, A and C, processing goes to “C” in FIG.  13 , i.e. “C” in FIG. 16. Data processing is carried out according to the flow shown in FIG. 16.  
         [0105]    In case of the priority order of B, C and A, processing goes to “D” in FIG. 13, i.e. “D” in FIG. 17. Data processing is carried out according to the flow shown in FIG. 17.  
         [0106]    In case of the priority order of C, B and A, processing goes to “E” in FIG. 13, i.e. “E” in FIG. 18. Data processing is carried out according to the flow shown in FIG. 18.  
         [0107]    In case of the priority order of C, A and B, processing goes to “F” in FIG. 13, i.e. “F” in FIG. 19. Data processing is carried out according to the flow shown in FIG. 19.  
         [0108]    First, informing unit  7 , a motion sensor, detects a noncontact-IC-information-carrier, when it enters in a communication range of reader/writer  11 . Next, informing unit  7  informs controller  8  of a noncontact-IC-information-carrier being in a communication range of reader/writer  11 . Controller  8 , reading the priority orders stored in communication priority storing memory  12  at the beginning of the communication, and determines the priority order for the communication (S 201 ).  
         [0109]    If the priority order stored in communication priority storing memory  12  is in the order of type A, B and C, processing goes to the flow shown in FIG. 14, as mentioned above.  
         [0110]    The processing is explained with reference to FIG. 14 and FIG. 20 on the case that reader/writer  11  communicates with a type C noncontact-IC-information-carrier in the above condition.  
         [0111]    Controller  8  reads a setting of communication enable/inhibit setting unit  4 . The setting is for enabling communication with type A (S 211 ). Accordingly, assuming the noncontact-IC-information-carrier as type A, controller  8  allows transmitter  2  to send a command for type A (S 212 ). Controller  8 , however, fails in communication, since the noncontact IC information carrier being in the communication range of reader/ writer is type C (S 213 ).  
         [0112]    Next, controller  8  reads the setting of communication enable/inhibit setting unit  4 . Controller  8  does not make communication, since the setting for inhibiting communication with type B (S 214 ).  
         [0113]    Next, controller  8  reads the setting of enable/inhibit setting unit  4 . The setting is for enabling communication with type C (S 215 ). Accordingly, assuming the noncontact-IC-information-carrier as type C, controller  8  allows transmitter  2  to send a command for type C (S 216 ). Receiver  3  can receive a response from the information carrier, since the noncontact IC information carrier communicating with reader/writer  11  is type C (S 217 ).  
         [0114]    Subsequently, required processing is performed. In the present exemplary embodiment, after finishing to read information from the information carrier, a number of communication times is increased by one for type C noncontact IC information carrier. The number is saved in communication times memory  13  with a newly recalculated check code  45  (S 218 ).  
         [0115]    Numbers of reading times with respect to each kind of noncontact IC information carriers are compared. Then, the priority order is determined in order of the number of reading times, for next communication. The priority order is stored in communication priority storing memory  12 .  
         [0116]    In the present exemplary embodiment, a number of communication times changes to ten (10) for type A, three (3) for type B and two (2) for type C respectively, after the communication with type C noncontact IC information carrier.  
         [0117]    Therefore, a priority order arranging type A as the first, followed by B and C is stored in communication priority storing memory  12  (S 219 ).  
         [0118]    Generally, the same kind of noncontact IC information carriers tends to communicate with the reader/writer with respect to each place. Therefore, the reader/writer in the present exemplary embodiment makes the noncontact IC information carriers used usually with the first priorit  
         [0119]    The reader/writer communicates with other kind noncontact IC information carriers than usual kind in an exceptional case. The priority for usual kind of noncontact IC information carrier is kept as the first priority, if the reader/writer has communicated with the kind of noncontact IC information carrier several times previously. Therefore, the reader/writer can perform a speedy information processing for the usual kind of noncontact IC information carrier afterwards, even if an exceptional case occurred.  
         [0120]    In addition, reader/writer  11  of this exemplary embodiment stores a priority order for next communication in communication priority storing memory  12 . Therefore, the number of communication times with respect to each kind of noncontact IC information carriers stored in the communication times memory are not necessarily compared each other to determine the priority order, when next communication is made. A speedy communication processing can be thus performed.  
         [0121]    Additionally, reader/writer  11  of this exemplary embodiment includes clearing unit  14  to clear data in communication times memory  13  from the outside. For example, when a reader/writer is moved to a different place and the reader/writer usually communicates with a different kind of noncontact IC information carrier than previously communicating with, a new number of communication times is stored in communication times memory  13 . Therefore, communication processing can be performed speedily as before moved.  
         [0122]    The data in communication times memory  13  is erased by reading in a predetermined noncontact IC information carrier designed for setting. Then the reader/writer newly counts a number of communication times, for example, when used or installed in different places.  
         [0123]    Therefore, the reader/writer can perform communication processing speedily at a place after moved, even if, as usual processing, the reader/writer communicates with a different kind of noncontact IC information carrier than before moved.  
         [0124]    In the present exemplary embodiment, communication times memory  13  employs an EEPROM, a nonvolatile memory. The reader/writer can keep the priority order for next communication unchanged, even if power supply  9  stops.  
         [0125]    After recovery of power supply, therefore, the reader/writer can perform a speedy communication with the same kind of noncontact information carrier as the previous communication time.  
         [0126]    Moreover, communication times memory  13  stores check code  45 , which performs sending a notice to the outside though noticing unit  15 , in case of some abnormalities in communication times memory  13 . The reader/writer  11  can be thus prevented from wrong operation due to erroneous information. Herein, some abnormalities means, for example, a case when reading times for type A shows 10000 times, though no communication is made with type A.  
         [0127]    Though notice unit  15  in the present exemplary embodiment employs a red LED, LEDs having different colors or any units that alarms the outside such as buzzer are available for the purpose.  
         [0128]    In addition, in the present exemplary embodiment, power supply  9  employs Lithium ion secondary battery. A shortened communication time reduces power consumption of battery used for power supply  9 , thereby resulting a longer continuous operating time.  
         [0129]    Moreover, in the present exemplary embodiment, communication enable/inhibit unit  4  employs a DIP switch. Communications from other units or a predetermined noncontact IC information carrier for settings may be used to set enabling or inhibiting communication.  
         [0130]    Accordingly, reader/writer  11  can be prevented from communicating with unnecessary noncontact IC information carriers and thus can perform a speedy communication processing.  
         [0131]    In the present exemplary embodiment, communication times memory  13  employs EEPROM. Other nonvolatile memories such as Ferroelectric Random Access Memory (FeRAM) can also be used for the purpose.  
       THIRD EXEMPLARY EMBODIMENT  
       [0132]    The information communication system in this exemplary embodiment of the present invention is explained with reference to FIG. 21A and FIG. 21B.  
         [0133]    In FIG. 21A, reader/writer  70  communicates with servers  74   a,    74   b  and  74   c  through communication terminal  72  and network  76 . Herein, reader/writer  70  has, for example, the same function and structure as described in the first exemplary embodiment of the present invention.  
         [0134]    In addition, network  60  includes at least one of wired networks and wire-less networks. Communication terminal  72  communicates with network  60 . In the information communication system, reader/writer  70  reads information from a noncontact IC information carrier. Communication terminal  72  sends the information, according to contents of the information, to a proper server to receive the information among a plurality of servers  74 . The information may be sent, according to the kind of noncontact IC information carrier, to the most appropriate server among a plurality of servers  74 .  
         [0135]    On the other hand, the server, responsive to the information received, may send back other information, for example, charge information incurred in the server to reader/writer  70  through network  76 .  
         [0136]    Reader/writer  70 , then, may write the information received from servers  74  to noncontact IC information carrier.  
         [0137]    In addition, as shown in FIG. 21B, reader/writer  71  may include transmitter/receiver  78 . In this case, transmitter/receiver  78  communicates with servers  74  instead of communication terminal  72 .  
         [0138]    As aforementioned exemplary embodiments, in this exemplary embodiment, the reader/writer can determine the priority order for next communication based on the priority order and the kind of noncontact information carrier with which the reader/writer communicated previously.  
         [0139]    In addition, a reader/writer sends information, according to the information which the reader/writer reads, to the most appropriate server. Moreover, the reader/writer can write the information received from the servers to the noncontact information carrier.  
       FOURTH EXEMPLARY EMBODIMENT  
       [0140]    The management system in the fourth exemplary embodiment of the present invention is explained with reference to FIG. 22.  
         [0141]    [0141]FIG. 22 shows, for example, an unloading work in a warehouse of a general distribution center in which packages of a plurality of express package services are collected and delivered. Packages  51 , collected from express agencies of each express package services, are once collected here, then sorted and delivered to each destination. First, parcels  51  unloaded from trucks are put on article conveying-way  52 . Noncontact IC information carrier  53  of each express package service is attached to each package  51 .  
         [0142]    Suppose that packages  51  of three express package services, A, B and C are treated in this exemplary embodiment.  
         [0143]    Type A noncontact-IC-information-carrier  53   a  is attached to package  51   a  of express package service A.  
         [0144]    Type B noncontact-IC-information-carrier  53   b  is attached to package  51   b  of express package service B.  
         [0145]    Type C noncontact-IC-information-carrier  53   c  is attached to package  51   c  of express package service C.  
         [0146]    In addition, reader/writer  50  having the same structure as noncontact IC information carrier reader/writer (herein after called reader/writer)  1  described in the first exemplary embodiment is disposed in a halfway of article conveying-way  52 . Moreover, reader/writer  50  includes wireless communication-unit  55  and point controller  57 . Wireless communication-unit  55  communicates with network  60  by wireless communication. Network  60  communicates with servers  54 A,  54 B and  54 C, each of which is for each express package service.  
         [0147]    Point controller  57  controls point  57 . Point  57  allows each of packages  51  to enter from article conveying-way  52  to one of divided ways  58 , to sort each of packages  51  to each destination. Reader/writer  1  reads information and a kind of noncontact IC information carrier  53  carried on packages  51  transported on conveying-way  52 . The information read is sent to wireless communication-unit  55 . Wireless communication-unit  55  accesses server  54  of each express package service, according to a kind of the noncontact IC information carrier. Reader/writer  50  registers server  54  that the packages are stored in the warehouse. At the same time, Reader/writer  50  receives destination information of package  53 , based on information of noncontact IC information carrier  53 , from server  53 . The destination information is sent to dividing point controller  57 . Dividing point controller  57  sorts packages  51  by switching point  56 , according to the destination.  
         [0148]    Moreover, noncontact IC information carrier  53  can store not only destination information but also other information concerning packages  51 , such as a kind of package, storage period in the warehouse until delivery to the next destination. Therefore, packages  51  are stored or placed in predetermined places according to information included into noncontact-IC-information-carrier  53 .  
         [0149]    In addition, the kinds and the quantity of packages to be stored are controlled according to information on package  51  stored in noncontact-IC-information-carrier  53 .  
         [0150]    Packages  51  transported on conveying-way  52  are collected by express agencies of each express package service in a sizable quantity. In many cases, therefore, packages  51  are transported on conveying-way  52  in a sizable quantity with respect to each express package service. For example, after twenty (20) packages of A company, fifteen (15) packages of B company are transported  
         [0151]    Reader/writer  50 , in the same way as reader/writer  1  described in the first exemplary embodiment, determines a priority order for next communication, after the communication with the noncontact IC information carrier  53  is completed, and makes the next communication.  
         [0152]    The priority order for next communication is determined based upon current priority order in the communication processing and upon the kind of noncontact IC information carrier which the reader/writer has communicated with.  
         [0153]    Accordingly, reader/writer  50  can speedily read-in information from a noncontact-IC-information-carrier and thus can shorten tact time of the logistic system.  
         [0154]    In addition, when the same kind of noncontact IC information carrier is assigned as the first priority order for both current and next communication time, the communication with server  54  may be kept connecting. A logistic system can be performed more efficiently in a shortened tact time.  
         [0155]    Additionally, in the fourth exemplary embodiment, a reader/writer includes a wireless communication unit. The wireless communication unit may be integrated into the reader/ writer or interfaced with an external device using a cable or the like.  
       Industrial Applicability  
       [0156]    As mentioned above, the reader/writer disclosed in this invention carries out communication determining the priority order for next communication, from the priority order of current communication processing and the kind of noncontact information carrier with which the reader/writer has communicated.  
         [0157]    Therefore, the reader/writer in the present invention can perform a speedy communication with a noncontact information carrier  
         [0158]    In addition, even if the reader/writer communicates with other kind noncontact IC information carriers exceptionally, the reader/writer can perform a speedy data processing with the noncontact information carrier usually used after exceptional cases.  
         [0159]    Therefore, if the reader/writer is powered by a battery, a shortened communication time will reduce power consumption of battery used, thereby resulting a longer operating time.  
         [0160]    In addition to the above benefits of the reader/writer, according to the information communication system in the present invention, the reader/writer can send information to the most appropriate server, based on information read from a noncontact information carrier.  
         [0161]    In addition to the merits of the reader/writer above mentioned, a management system in the present invention can stock or place articles after sorting, based on a kind of noncontact information carrier read in reader/writer.