JP2006323585A - Communication system, data transmission equipment, data assembly equipment, data transmission method, data transmission program and data assembly program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system for transmitting information which is present in a hierarchy lower than the designated hierarchy of a memory area while suppressing the consumption of a memory. <P>SOLUTION: A personal digital assistant(PDA) 100 which requests the transmission of information and an IC chip 200 which transmits information stored in a memory area in response to this request are connected to a communication system 10. An information acquisition requesting part 111 of the PDA 100 designates the predetermined area of the memory area, and transmits an information acquisition request. A storage part 231 of an IC chip 200 divides the memory area into a plurality of areas having a hierarchical structure, and stores area information showing each of the divided areas and service information showing the position of a service. A selection part 241 selects the area information or the service information of the storage part 231 stored in the hierarchy below the designated area in accordance with the information acquisition request. A communication part 251 transmits the selected information to the PDA 100. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system for transmitting data. In particular, the present invention relates to a communication system that transmits data between a first electronic device and a second electronic device that has a limited memory.

  For example, the second electronic device (for example, the IC chip 200 in FIG. 1) has a memory area having a hierarchical structure as shown in FIG. 3, and the first electronic device (for example, the portable device in FIG. 1). When the information terminal 100) requests acquisition of the layer portion information (area information and service information) indicated by A in FIG. 3, conventionally, all the information included in A is collectively collected from the IC chip 200 to the portable information. A data transmission method for transmitting data to the terminal 100 has not been proposed. That is, in order for the portable information terminal 100 to acquire information included in A, the portable information terminal 100 transmits information acquisition request commands for acquiring area 1, area 2, and area 3 separately, Information acquisition request commands for acquiring service 1, service 2, service 3, and service 4 have to be transmitted separately, and the processing is complicated.

  In order to avoid such complexity of processing, the node tree list 230b of FIG. 4 storing the information having the hierarchical structure of FIG. 3 as one-dimensional information is stored in the nonvolatile memory built in the IC chip 200. After copying from (for example, EEPROM) to volatile memory (for example, RAM), in response to a single information acquisition request command, the data on the volatile memory is batched from IC chip 200 to portable information terminal 100. It is also conceivable to transmit the data.

  However, in an apparatus such as the IC chip 200 where the capacity of volatile memory (RAM) that can be used in the IC chip is limited, a data transmission method that suppresses memory consumption as much as possible is desired. In the above transmission method, since the node tree list must be copied to the volatile memory, there is a problem that a large area of the volatile memory is consumed during data transmission.

  Therefore, the present invention has been made in view of such a problem, and an object of the present invention is to easily transmit information in a hierarchy below a specified hierarchy of a memory area while suppressing memory consumption. It is to provide a communication system.

  In order to solve at least one of the above problems, according to an aspect of the present invention, a first electronic device that requests transmission of information and a second that transmits information stored in a memory area in response to the request. A communication system having the following characteristics is provided. That is, the first electronic device includes an information acquisition request unit that designates a predetermined area of the memory area and transmits an information acquisition request to the second electronic device. The memory area is divided into a plurality of areas having a hierarchical structure so that the area of the upper layer is included in any area of the upper hierarchy, and area information indicating each divided area is provided to the user A storage unit for storing service information indicating a position of the service on the memory area; and information stored in the storage unit in response to the transmitted information acquisition request, the specified area or less A selection unit that selects area information and service information stored in the hierarchy as transmission information, and a communication unit that transmits the transmission information selected by the selection unit to the first electronic device. Communication system according to claim Rukoto is provided.

  According to this, in the storage unit of the second electronic device, the memory area is divided into a plurality of areas having a hierarchical structure so that the lower hierarchical area is included in any of the upper hierarchical areas. Then, area information indicating each divided area and service information indicating the position of the service provided to the user on the memory area are stored.

  In this way, each piece of information has information about its own position on the memory in the hierarchical structure, so that transmission information (area information and service information) stored in the hierarchy below the designated area is transferred to the second electronic device. Even if the transmission from the device to the first electronic device is performed in a lump, the first electronic device can reconstruct the hierarchical structure of each information from the transmission information transmitted in a lump. As a result, it is possible to construct a communication system that easily transmits information in a hierarchy below the designated hierarchy of the memory area.

  The first electronic device that requests the transmission of information may be composed of, for example, a portable information terminal or a reader / writer. In addition, the second electronic device that transmits information stored in the memory area may be configured by, for example, an IC chip or an IC card incorporating the IC chip. When the first electronic device is a portable information terminal and the second electronic device is an IC chip built in the portable information terminal, the portable information terminal (first electronic device) containing the IC chip (second electronic device) The electronic device) can acquire each information by transmitting the area information and the service information stored in the memory in the IC chip from the IC chip. An example of the IC card with an IC chip as an example of the second electronic device is a non-contact type IC card such as FeliCa (registered trademark), but may be a contact type IC card.

  In the communication system, the communication unit may transmit the transmission information for each packet. In addition, the communication unit divides transmission information including a plurality of area information and service information stored in a hierarchy below the designated area into a plurality of packets and transmits them in a random order. Furthermore, an acquisition unit that acquires the plurality of transmitted packets, a determination unit that determines whether or not all of the plurality of packets have been acquired by the acquisition unit, and all of the plurality of packets that are acquired by the determination unit If it is determined that the service information has been received, a plurality of transmitted data are transmitted in accordance with the size of the area indicated by each area information included in the acquired packet and the position in the memory area of the service indicated by each service information included in the acquired packet. An assembly unit that hierarchically assembles the area information and the service information.

  At this time, the communication unit transmits the packet including continuation information indicating whether or not there is a packet to be continuously transmitted in the packet to be transmitted. It may be determined whether or not all of the packets have been acquired.

  According to this, the first electronic device acquires all packets including a plurality of area information and service information stored in a hierarchy below the specified area based on the continuation information, and acquires the acquired plurality of packets. Each information included in the packet can be reconstructed hierarchically.

  The first electronic device may further include a display unit that displays area information and service information assembled by the assembly unit using a predetermined browser.

  According to this, the user of the first electronic device (for example, a portable information terminal) displays the reconstructed area information and service information using a predetermined browser, so that the service he has received up to now is displayed. You can find out what services you can get.

  The information acquisition request unit may request retransmission of the transmitted packet, and the communication unit may retransmit the transmitted packet in response to the request.

  According to this, even if an error occurs in data during data transmission, only the data in which the error has occurred can be transmitted again by requesting retransmission of the packet. In this way, data transmission can be performed easily and reliably by transmitting only an erroneous packet without transmitting all packets from the beginning in response to an error in data transmission.

  In addition, when a new information acquisition request is transmitted by designating a new area by the information acquisition request unit, the communication unit stops transmission of the ongoing packet and a packet corresponding to the new information acquisition request is sent. May be started.

  According to this, if a new information acquisition request command is transmitted while a packet is being transmitted in response to a certain information acquisition request, the packet transmission for the previous information acquisition request is terminated halfway and immediately Transmission of a packet in response to a new information acquisition request is started. Thereby, the user of the portable information terminal 100 can interrupt unnecessary packet transmission and immediately switch to packet transmission including desired service information. As a result, the user can immediately obtain desired service information.

  The area information may indicate a start position and an end position of the area on the memory area, and the service information may indicate a position in the area for specifying a service. Here, the start position of the area, the end position of the area, and the position in any area for specifying the service may be information indicating a predetermined position of the memory area in coordinates. Good.

  According to this, it is possible to hierarchically construct (assemble) the wide and narrow areas and the lower areas of each area indicated by the area start position and the area end position. In addition, by determining which area a predetermined service is included in from the predetermined position in the area indicated by each service information, the service information can be hierarchically incorporated into the area having the above hierarchical structure. it can.

  According to another aspect of the present invention, the memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas. A storage unit for storing area information indicating each area and service information indicating a position of a service provided to the user on the memory area, and a predetermined area of the memory area specified by a predetermined electronic device A selection unit for selecting, as transmission information, area information and service information stored in a hierarchy below the designated area among the information stored in the storage unit in response to the transmitted information acquisition request; A data transmission device comprising: a communication unit that packet-transmits transmission information selected by the selection unit to the predetermined electronic device.

  At this time, examples of the predetermined electronic device include the first electronic device described above, that is, a portable information terminal and a reader / writer. Examples of the data transmission device include the second electronic device described above, that is, an IC chip or an IC card incorporating an IC chip.

  According to another aspect of the present invention, an information acquisition request unit that designates a predetermined area in a memory area and transmits an information acquisition request, and a lower hierarchy area is included in any of the upper hierarchy areas. As described above, the memory area is divided into a plurality of areas having a hierarchical structure, area information indicating each divided area, service information indicating a position of the service provided to the user on the memory area, and storage Receiving a plurality of packets including area information and service information stored in a hierarchy below the area specified by the transmitted information acquisition request transmitted from a predetermined electronic device having a storage unit The acquisition unit for acquiring the plurality of packets, the determination unit for determining whether or not all of the plurality of transmitted packets have been acquired, and the transmission by the determination unit If it is determined that all of the acquired plurality of packets have been acquired, the area of the area indicated by each area information included in the acquired plurality of packets, and the memory of the service indicated by each service information included in the acquired plurality of packets There is provided a data assembly device including an assembly unit that hierarchically assembles acquired area information and service information according to a position on an area.

  At this time, examples of the predetermined electronic device include the above-described second electronic device, that is, an IC chip or an IC card incorporating an IC chip. Examples of the data assembly device include the above-described first electronic device, that is, a portable information terminal and a reader / writer.

  According to another aspect of the present invention, data is transmitted between a first electronic device that requests transmission of information and a second electronic device that transmits information stored in a memory area in response to the request. A method of transmitting data, wherein the first electronic device designates a predetermined area of the memory area and transmits an information acquisition request to the second electronic device; The memory area is divided into a plurality of areas having a hierarchical structure so as to be included in any area of the upper hierarchy, area information indicating each divided area, and the memory area of the service provided to the user Storing the service information indicating the upper position in the storage unit, and the second electronic device, among the information stored in the storage unit in response to the transmitted information acquisition request, Designated A step of selecting area information and service information stored in a hierarchy below the rear as transmission information, and a step of packet-transmitting the selected transmission information to the first electronic device. A data transmission method is provided.

  According to another aspect of the present invention, the memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas. Processing for storing area information indicating each area and service information indicating the position of the service provided to the user on the memory area in the storage unit, and specifying a predetermined area of the memory area from a predetermined electronic device A process of selecting area information and service information stored in a hierarchy below the designated area as transmission information from the information stored in the storage unit in response to the information acquisition request transmitted A data transmission program is provided that causes a computer to execute a process of packet-transmitting the selected transmission information to the predetermined electronic device.

  Further, according to another aspect of the present invention, a process for designating a predetermined area of a memory area and transmitting an information acquisition request, and a lower hierarchy area are included in any of the upper hierarchy areas. In addition, the memory area is divided into a plurality of areas having a hierarchical structure, area information indicating each divided area, service information indicating a position of the service provided to the user on the memory area, and a storage unit for storing Receiving a plurality of packets transmitted from a predetermined electronic device including the area information and the service information stored in a hierarchy below the area designated by the information acquisition request. Thus, the processing for acquiring the plurality of packets, the processing for determining whether or not all of the plurality of transmitted packets have been acquired, and the plurality of packets transmitted. If it is determined that all of the service information is acquired, the area of the area indicated by each area information included in the acquired plurality of packets, the position of the service indicated by each service information included in the acquired plurality of packets in the memory area, and Thus, a data assembly program is provided which causes a computer to execute processing for hierarchically assembling the acquired area information and service information.

  As described above, according to the present invention, it is possible to provide a communication system that easily transmits information in a layer below a specified layer of a memory area while suppressing memory consumption.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

(Overall configuration of communication system)
First, an overall configuration of a communication system according to an embodiment of the present invention will be described with reference to FIG. The communication system 10 includes a portable information terminal 100 and an IC chip 200. The portable information terminal 100 includes a controller 110 and a display 120, and further includes an IC chip 200. The portable information terminal 100 and the IC chip 200 are connected inside the portable information terminal 100 by a wired interface 400 (circuit).

  The controller 110 is provided with a microcomputer mainly composed of a CPU, a ROM, a RAM and an interface (not shown). A ROM (not shown) stores programs for executing functions of the portable information terminal 100 described later. Further, a CPU (not shown) achieves each function of the portable information terminal 100 by executing a program stored in the ROM. Note that the portable information terminal 100 of this embodiment is an example of a first electronic device (data assembly device) that requests transmission of information.

  The IC chip 200 is a semiconductor integrated circuit, and is an example of a second electronic device that transmits information stored in a memory area (nonvolatile memory 230). Specifically, the IC chip 200 includes a ROM 210, a volatile memory 220 (for example, RAM), a nonvolatile memory 230 (for example, EEPROM), a CPU 240, and a communication circuit 250.

  The ROM 210 stores a program for executing each function of the IC chip 200 and various data. The RAM 220 temporarily stores data such as a start index, an end index, and various codes described later. The EEPROM 230 stores the node tree list shown in FIG. The CPU 240 achieves each function of the IC chip 200 by executing a program stored in the ROM 210 using data stored in the RAM 220 and the EEPROM 230.

(Functions of portable information terminal 100 and IC chip 200)
Next, each function of the portable information terminal 100 and the IC chip 200 will be described with reference to FIG. 2 showing functional blocks of each part.
(Function of portable information terminal 100)
The controller 110 of the portable information terminal 100 has functional blocks indicated by an information acquisition request unit 111, an acquisition unit 112, a determination unit 113, and an assembly unit 114.

  The information acquisition request unit 111 transmits a node tree acquisition request command (information acquisition request) to the IC chip 200 by designating a predetermined area of the memory area 230a shown in FIG. In addition, the information acquisition request unit 111 requests the IC chip 200 to continue the packet or retransmit the packet.

  Here, the node tree acquisition request command will be described. The node tree acquisition request command includes area information (area code, end service code), service information (service name, service name, Service code). When sending a node tree acquisition request command, the following conditions are assumed.

(1) The reply packet length is limited. Here, in order to simplify the explanation, the reply packet length is 6 bytes. Actually, it may be any size such as 256 bytes.
(2) If the area information and service information exceed the reply packet length and do not fit in one reply packet, the packet shall be returned in multiple packets with the continuation flag set to “true” To do. If there are no more reply packets, the reply packet is returned with the continuation flag set to “false”. In the packet, “true” corresponds to “0x01”, and “false” corresponds to “0x00”. The continuation flag corresponds to continuation information indicating whether there is a packet to be transmitted next time.
(3) The order of the area information and the service information to be returned does not matter.
(4) When there is a retransmission request, the previously sent packet is returned.

  The acquisition unit 112 acquires a plurality of packets transmitted from the IC chip 200 under such conditions. The determination unit 113 determines whether or not all the plurality of packets have been acquired by the acquisition unit 112.

  When it is determined by the determination unit 113 that all of the plurality of packets have been acquired, the assembling unit 114 determines the size of the area indicated by each area information included in the acquired packet and the area indicated by each service information included in the acquired packet. The hierarchical structure of area information and service information included in a plurality of packets is assembled (reconstructed) according to the position of the service within the network. The display unit 121 displays each area information and each service information hierarchically assembled by the assembling unit 114 on the display 120 using a browser.

(Function of IC chip 200)
The IC chip 200 has functional blocks indicated by the storage unit 231, the selection unit 241, and the communication unit 251.

  The storage unit 231 divides the memory area into a plurality of areas having a hierarchical structure so that the area of the lower hierarchy is included in any area of the upper hierarchy, and area information indicating each divided area and , Service information indicating the location (within any area) of the service provided to the user on the memory area.

  Specifically, the memory area is divided into areas having a hierarchical structure, as shown in FIG. The area information includes an area name (such as Area0), an area code indicating the start position of the area, and an end service code indicating the end position of the area. In the area code and the end service code, an identification code indicating the start position and end position of the area range is displayed in hexadecimal.

  As described above, the area code and end service code included in each area information indicate the start position and end position of the area, so that the range designation by these identification codes is changed to area 0 in the upper hierarchy. Indicates that area 1 to area 5 are included. Similarly, the area 1 of the lower hierarchy includes the areas 2 and 3 of the lower hierarchy, and the area 4 of the lower hierarchy includes the area 5 of the lower hierarchy. In this way, the area code and end service code of each area information are set so that the lower hierarchy area is included in the upper hierarchy area, and the lower hierarchy area is divided into multiple upper hierarchy areas. It is not set to span.

  The service information includes a service name (Service 1 or the like) and a service code indicating a position in any area for specifying the service. In the service code, the identification code on the memory area is displayed in hexadecimal. For example, in the service code of service 1, the position [10, 08] in the area 1 [10:00]-[1f, ff] is set.

  On the other hand, each information in the memory area 230a having a hierarchical structure as shown in FIG. 3 is stored in the node tree list 230b (one-dimensional array list) as shown in FIG. It is stored in the EEPROM 230 in the form. The node tree list 230b includes an index 230b1, a name 230b2 (used for the description of the present embodiment and may or may not actually exist), an area code or service code 230b3, and an end service code 230b4. Is retained. The order of the list may be randomly registered regardless of the identification code in a state where areas and services are mixed. In the present embodiment, the list length is “11”.

  In response to the node tree acquisition request command transmitted from the information acquisition request unit 111, the selection unit 241 is stored in the hierarchy below the specified area among the information stored in the storage unit 231 (EEPROM 230). Area information and service information are selected as transmission information. For example, when area 1 is designated by the node tree acquisition request command, the selection unit 241 selects area information and service information of the layer portion indicated by A in FIG. 3 as transmission information. The communication unit 251 divides the transmission information thus selected by the selection unit 241 into a plurality of node tree packets and transmits them in random order.

  Using each function shown in the above functional block, the portable information terminal 100 transmits a node tree acquisition request command (1), and the IC chip 200 responds accordingly with the area information below the certain area and A node tree packet including service information is transmitted (2). The transmitted node tree packet is reconstructed by the assembling unit 114. The node tree list 230b having the reconstructed hierarchical structure is displayed on the display 120 using a browser (3). Thereby, the user of the portable information terminal 100 can confirm the service he can receive from the displayed node tree data.

(Packet transmission method)
(1. Node tree acquisition request and packet transmission)
Next, a packet transmission method performed between the portable information terminal 100 and the IC chip 200 in the present embodiment will be described with reference to FIGS. As shown in FIG. 5, first, the CPU of the portable information terminal 100 transmits a node tree acquisition request command designating area 1 to the IC chip 200 in S11.

  When the node tree acquisition request command is received, the CPU of the IC chip 200 starts processing from the start (1) in FIG. 6 which is a flowchart showing the packet transmission method. The case where the process is started from the start (1) is a case where an area code to be searched is specified and the first packet is requested.

  In this case, the CPU of the IC chip 200 searches the area to be searched (in this case, area 1) from the node tree list 230b at f1, and the area code [10:00] (end service code [1f, ff]) area is present in the node tree list 230b. Next, at the same f1, the CPU of the IC chip 200 holds the area code [10:00] as the search target area code (R-1) in the RAM 220 and the end service code [1f, ff] as the search target end. The service code (R-2) is stored in the RAM.

  Next, the CPU of the IC chip 200 proceeds to f2, sets a value of “0” to the search index indicating the search position of the node tree list 230b so that the search starts from the top of the list, and starts the index (R −3) is set to a value of “0”, the process proceeds to f3, and the search process after f3 is executed. That is, first, the CPU of the IC chip 200 increases the search index by “1” at f3, and proceeds to f4 to determine whether or not the search index exceeds the node length of the node tree list 230b.

  At this time, the search index value “1” does not exceed the node length “11” of the node tree list 230b shown in FIG. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. When the information of the index “1” indicated by the search index is area information, the area code 230b3 and the end service code are displayed. It is determined whether 230b4 is within the range of the search target end service code (R-2) from the search target area code (R-1) held in the RAM 220. Whether the index information is area information or service information may be determined by the name 230b2, and the presence or absence of the end service code 230b4 (that is, the data of the end service code 230b4 is stored in the node tree list 230b). The service information may be determined based on area information if registered in service information, and service information if not registered.

  At this time, the index “1” is area information, and the area code is [00, 00], which is outside the range of the search target area code (R−1) [10:00] held in the RAM 220. . Therefore, the CPU of the IC chip 200 determines “No” at f5 and returns to f3.

  Next, the CPU of the IC chip 200 increases the search index by “1” at f3, and proceeds to f4 to determine whether or not the search index exceeds the node length of the node tree list 230b.

  At this point, the search index value “2” does not exceed the node length “11”. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. The information of the index “2” indicated by the search index is area information, and the area code 230b3 [20:00] and end service code 230b4 [4f, ff] are the search area code (R-1) [ 10:00] to the search target end service code (R-2) [1f, ff]. Therefore, the CPU of the IC chip 200 determines “No” at f5, returns to f3, increases the search index by “1” at f3, advances to f4, and the search index increases the node length of the node tree list 230b. It is determined whether or not it exceeds.

  At this time, the search index value “3” does not exceed the node length “11”. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. The area code 230b3 [3,00] and the end service code 230b4 [4f, ff] of the index “3” are searched. Since it is out of the range of the search target end service code (R-2) [1f, ff] from the area code (R-1) [10:00], it is determined as “No” at f5 and returns to f3 again.

  Next, the CPU of the IC chip 200 increases the search index by “1” at f3, and proceeds to f4 to determine whether or not the search index exceeds the node length of the node tree list 230b.

  At this point, the search index value “4” does not exceed the node length “11”. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. Here, the area code 230b3 [10:00] and the end service code 230b4 [1f, ff] of the index “4” are searched from the search target area code (R-1) [10:00] to the search target end service code (R -2) It is within the range of [1f, ff]. Therefore, the CPU of the IC chip 200 determines “Yes” at f5, proceeds to f6, and determines whether or not the packet length (6 bytes) can be accommodated when the area information is added to the packet.

  At this time, as shown in packet 1 of FIG. 5, when area information [10:00], [1f, ff] of area 1 is added to packet 1, the packet area used is 4 bytes. , Area information of area 1 is contained in packet 1. Therefore, the CPU of the IC chip 200 determines “Yes” at f6 and proceeds to f7 to add the area information [10, 00] and [1f, ff] of area 1 to the reply packet (packet 1). Return to f3.

  Next, the CPU of the IC chip 200 increases the search index by “1” at f3, and proceeds to f4 to determine whether or not the search index exceeds the node length of the node tree list 230b.

  At this time, the search index value “5” does not exceed the node length “11”. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. Here, the information of the index “5” is service information, and the service code 230b3 [10, 08] is searched from the search target area code (R-1) [10:00] to the search target end service code (R-2). ) Within the range of [1f, ff]. Therefore, the CPU of the IC chip 200 determines “Yes” at f5 and proceeds to f6 to determine whether or not the service length is within the packet length (6 bytes) when the service information is added to the packet.

  At this time, as shown in packet 1 of FIG. 5, when service information [10, 08] of service 1 is added to packet 1, the packet area used is 2 bytes. Fits in packet 1. Therefore, the CPU of the IC chip 200 determines “Yes” at f6, proceeds to f7, adds the service information [10, 08] of service 1 to the return packet (packet 1), and returns to f3.

  Next, when the CPU of the IC chip 200 increases the search index by “1” at f3, the value “6” of the search index does not exceed the node length “11” at this time. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. The service code 230b3 [11, 09] of the index “6” is within the range of the search target area code (R-1) [10:00] to the search target end service code (R-2) [1f, ff]. . Therefore, the CPU of the IC chip 200 determines “Yes” at f5 and proceeds to f6 to determine whether or not the service length is within the packet length (6 bytes) when the service information is added to the packet.

  At this time, if service information [11, 09] of service 2 is added to packet 1, the reply packet length exceeds 6 bytes. Therefore, the CPU of the IC chip 200 determines “No” at f6, proceeds to f8, and sets “5”, which is a value obtained by subtracting 1 from the current search index “6”, as the end index (R-3). Hold. Next, the CPU of the IC chip 200 proceeds to f9, sets “01 (true)” indicating that there is continuation in the continuation flag, and, as shown in FIG. 5, information on area 1 and service 1, the continuation flag, , [1, 00, 1f, ff, 10, 08, 01] packet 1 (reply packet) is transmitted to the portable information terminal 100 (S21), and this process is temporarily terminated (return (1)). .

  At this time, [10, 00] is held in the search target area code (R-1), [1f, ff] is held in the search target end service code (R-2), and the start index ( “0” is held in R-3), and “5” is held in the end index (R-4).

(2. Request for continuation packet and transmission of continuation packet)
As shown in FIG. 5, when the portable information terminal 100 receives the packet 1, the CPU of the portable information terminal 100 confirms that the continuation flag is “true” and requests a continuation packet (S12).

When the continuation packet is requested, the CPU of the IC chip 200 starts the processing from the start (2) in FIG. 6 and proceeds to f11 to set the value “5” of the end index (R-4) as the search index, and Set to the start index (R-3) and proceed to f3. Next, the CPU of the IC chip 200 repeats the processes from f3 to f7 until it is determined “No” at f6.
As a result of this repetition, the information of service 2 and area 2 is registered in packet 2, and when the CPU executes the processing of f3 to f6 when the search index becomes “9”, the CPU of IC chip 200 It is determined as “No” at f6, and the process proceeds to f8, where “8”, which is a value obtained by subtracting 1 from the search index “9” at this time, is held in the end index (R-3). Next, the CPU of the IC chip 200 proceeds to f9, sets “01 (true)” indicating the presence of continuation in the continuation flag, and, as shown in FIG. 5, information on the service 2 and area 2, the continuation flag, , [11, 09, 12, 00, 12, ff, 01] is returned to the portable information terminal 100 (S22), and the process is temporarily terminated (return (1)).

  At this time, [10:00] for the search target area code (R-1), [1f, ff] for the search target end service code (R-2), and “5” for the start index (R-3). "," 8 "is held in the end index (R-4).

  Next, in response to the continuation packet request (S13) transmitted from the portable information terminal 100, the CPU of the IC chip 200 repeats the processing of f11, f3 to f9 again. As a result, as shown in FIG. The packet 3 of [12, 09, 13, 00, 13, ff, 01] including the service 3 and area 3 information and the continuation flag indicating continuation is returned to the portable information terminal 100 (S23). The process is temporarily terminated (return (1)).

  At this time, [10:00] for the search target area code (R-1), [1f, ff] for the search target end service code (R-2), and “8” for the start index (R-3). "," 10 "is held in the end index (R-4).

  Further, in response to the continuation packet request (S14) transmitted from the portable information terminal 100, the CPU of the IC chip 200 sets the end index value “10” as the search index and the start index at f11, and sets f3. The search index is incremented by “1”, and the process proceeds to f4. At this point, the search index value “11” does not exceed the node length “11”. Therefore, the CPU of the IC chip 200 determines “Yes” at f4 and proceeds to f5. The service code 230b3 [13, 09] of the index “11” is within the range of the search target area code (R-1) [10:00] to the search target end service code (R-2) [1f, ff]. . Therefore, the CPU of the IC chip 200 determines “Yes” at f5 and proceeds to f6 to determine whether or not the service length is within the packet length (6 bytes) when the service information is added to the packet.

  At this time, even if the service code 230b3 [13, 09] of the service 4 is added to the packet 4, the reply packet length does not exceed 6 bytes. Therefore, the CPU of the IC chip 200 determines “Yes” at f6, proceeds to f7, adds the service information [13, 09] of the service 4 to the packet 4, and returns to f3.

  Next, the CPU of the IC chip 200 increases the search index by “1” at f3 and proceeds to f4. At this time, the search index value “12” exceeds the node length “11”. Therefore, the CPU of the IC chip 200 determines “No” at f4 and proceeds to f10. Next, the CPU of the IC chip 200 sets “00 (false)” indicating no continuation as the continuation flag, and includes the information of the service 4 and the continuation flag as shown in FIG. , 00] is returned to the portable information terminal 100 (S24), and this process is temporarily terminated (return (2)).

  As described above, according to the communication system 10 of the present embodiment, only a few index values are temporarily stored in the RAM 220, and the node tree list 230b is not copied from the EEPROM 230 to the RAM 220. The area information or the service information stored in the hierarchy can be sequentially transmitted in a plurality of packets. As described above, according to the communication system 10 of the present embodiment, the information in the hierarchy below the specified area of the memory area is collectively transmitted by a simple method while suppressing the consumption of the memory on the RAM 220 as much as possible. be able to.

(3. Retransmission request and packet retransmission)
Next, a packet transmission method when portable information terminal 100 requests retransmission of a packet will be described. Specifically, as shown in FIG. 7, when packet 1 and packet 2 are transmitted in S11, S12, S21, and S22, a packet for a retransmission request (retry) is transmitted from portable information terminal 100 The packet retransmission process (S25) in (S15) will be described.

  At the time point after packet 1 and packet 2 are transmitted, as described above, the search target area code (R-1) is [10:00] and the search target end service code (R-2) is [1f. , Ff], “5” is held in the start index (R-3), and “8” is held in the end index (R-4).

  The CPU of the IC chip 200 starts processing from the start (3) in FIG. 6, sets the value “5” of the start index (R-3) as a search index at f12, proceeds to f3, and moves to f6. By repeating the processing of f3 to f7 until it is determined as “No”, the information of service 2 and area 2 is added to packet 2. When it is determined “No” at f6, the CPU of the IC chip 200 proceeds to f8 and sets “8”, which is a value obtained by subtracting 1 from the current search index “9” as the end index (R-3). Hold. Next, the CPU of the IC chip 200 proceeds to f9, sets “01 (true)” indicating the presence of continuation in the continuation flag, and, as shown in FIG. 5, information on the service 2 and area 2, the continuation flag, , [11, 09, 12, 00, 12, ff, 01] packet 2 is retransmitted to the portable information terminal 100 (S25), and this process is temporarily terminated (return (1)).

  Subsequently, when a continuation packet is requested from the portable information terminal 100 (S13), the CPU of the IC chip 200, after the processing of f11, f3 to f9, the packet 3 including the service 3 and area 3 information and the continuation flag. Is returned (S23), and the process is temporarily terminated (return (1)).

  Furthermore, when a continuation packet is requested again from the portable information terminal 100 (S14), the CPU of the IC chip 200 executes the processes of f11, f3, f4 to f10, and there is no continuation with the service information of the service 4 ( The packet 4 including the continuation flag indicating “false” is returned (S24), and the series of processing is terminated (return (2)).

  As described above, according to the communication system 10 of the present embodiment, even if an error occurs in data during data transmission, only the data in which the error has occurred is acquired again by the mobile information terminal 100 requesting retransmission of the packet. can do. As a result, it is possible to easily and reliably perform data transmission by transmitting only an erroneous packet without transmitting all packets from the beginning in response to an error in data transmission.

(4. New information processing request command transmitted during packet transmission)
A packet transmission method in the case where portable information terminal 100 transmits a new information processing request command during packet transmission will be described. Specifically, as shown in FIG. 8, after packets 1 and 2 are transmitted in S11, S12, S21, and S22, a new area is designated from the portable information terminal 100 and an information processing request command is issued. The process (S26, S27) of stopping transmission of the previous packet and starting transmission of the packet in response to a new information acquisition request when transmitted (S16) will be described.

  After the packet 1 and the packet 2 are transmitted, when the CPU of the portable information terminal 100 designates the area 4 and transmits a new information acquisition request command, the CPU of the IC chip 200 starts from the start (1) in FIG. The processing is started, and the area to be searched (in this case, area 4) is searched from the node tree list 230b at f1, and the area of area code [20, 00] (end service code [4f, ff]) Exists in the node tree list 230b. Next, at the same f1, the CPU of the IC chip 200 holds the area code [20, 00] as the search target area code (R-1) in the RAM 220 and the end service code [4f, ff] as the search target end. The service code (R-2) is stored in the RAM.

  Next, the CPU of the IC chip 200 proceeds to f2, sets a value of “0” to the search index, sets a value of “0” to the start index (R-3), and then sets f3 to f9. Execute the process. As a result, as shown in FIG. 5, a new packet 1 of [20, 00, 4f, ff, 01] including information on area 4 and a continuation flag indicating continuation is returned to portable information terminal 100. (S26), this process is temporarily terminated (return (1)).

  Subsequently, when a continuation packet is requested from the portable information terminal 100 (S17), the CPU of the IC chip 200 returns a new packet 2 including information on the area 5 and the service 5 after processing f11, f3 to f9. (S27), and this process is temporarily terminated (return (1)). Hereinafter, the processing is continued until the continuation flag becomes no continuation, but the description of the processing is omitted.

  As described above, according to the communication system 10 of the present embodiment, while a packet is being transmitted in response to an information acquisition request, by requesting transmission of a packet in response to a new information acquisition request, the previous information acquisition is performed. The packet transmission for the request can be terminated halfway, and the packet transmission for the new information acquisition request can be started immediately. Thereby, the user of the portable information terminal 100 can interrupt unnecessary packet transmission and immediately switch to packet transmission including desired service information. As a result, the user can immediately obtain desired service information.

  As described above, according to the communication system 10 of the present embodiment, a certain area is saved in the form of saving memory without holding the node tree list 230b in the hierarchy below the designated search target area in the RAM 220. The node tree list 230b in the lower hierarchy can be returned after being divided into a plurality of packets. Further, it is possible to retransmit the packet as appropriate in response to the retransmission request.

  Note that the processing of S11 to S17 is achieved by the function of the information acquisition request unit 111. Further, the process of receiving the packets transmitted in S11 to S17 and the process of S21 to S27 are achieved by the function of the communication unit 251. Further, the process of receiving the packets transmitted in S21 to S27 is achieved by the function of the acquisition unit 112.

(Packet assembly)
Finally, a method for assembling a packet acquired from the IC chip will be described. When the CPU (acquisition unit 112) of the portable information terminal 100 acquires each packet (packet 1 to packet 4) illustrated in FIG. 5, the CPU (determination unit 113) indicates that the value of the continuation flag included in each packet is “ It is determined whether or not all the plurality of packets have been acquired depending on whether it is “01 (true)” or “00 (false)”. That is, when the value of the continuation flag is “01 (true)”, the CPU (determination unit 113) determines that there is a packet that has not yet been acquired, and when the value of the continuation flag is “00 (false)”, It is determined that all the plurality of packets have been acquired.

  In this way, when it is determined by the CPU (determination unit 113) that all the plurality of packets have been acquired, the CPU (assembly unit 114) determines whether the area indicated by each area information included in the acquired packet is wide and narrow. The hierarchical structure of the transmitted area information and service information is assembled according to the position of the service in the area indicated by each service information included in the received packet.

  Specifically, for example, the range of area 1 is [10:00] to [1f, ff], and the range of area 2 is [12.00] to [12, ff], so area 2 Included in area 1. Therefore, area 2 is located below area 1. Service 1 [10, 08] is included in the range of area 1, but is not included in the range of area 2 and the range of area 3. Therefore, service 1 is located in the lower part of area 1. Further, service 3 [12, 09] is included in the range of area 1 and also included in the range of area 2. Therefore, the service 3 is located in the lower level of the area 2 that is the lowest area.

  While making this determination, the assembling unit 114 hierarchically reconstructs the area information and service information included in all acquired packets. In this way, the assembling unit 114 reconstructs each information, so that the display unit 121 can display area information (electronic money area, commuter pass area) and service information (balance information, Purchase history, boarding section, expiration date, boarding history) are hierarchically displayed on the display 120.

  For example, if the user has been receiving, for example, a balance information inquiry service, there has conventionally been no easy way to know what kind of service he can receive. However, according to the communication system 10 according to the present embodiment, as shown in FIG. 2, a balance information inquiry service, a history information service such as a purchase history, and a boarding history are displayed on the display 120 as an electronic money service. Can do. Thereby, the user can know what service (for example, purchase history service) can be received in addition to the balance information inquiry service that he has received so far.

  In the above embodiment, the operations of the respective units are related to each other, and can be replaced as a series of operations in consideration of the relationship between each other. And it can be set as embodiment of method invention by replacing in this way.

  Further, by replacing the operation of each unit with the processing of each unit, the program can be implemented. Further, by storing the program in a computer-readable recording medium in which the program is recorded, an embodiment of a computer-readable recording medium recorded in the program can be obtained.

  Therefore, in the embodiment of the data transmission method, the memory area is divided into a plurality of areas having a hierarchical structure so that the lower hierarchy area is included in any area of the upper hierarchy, and each divided area is divided. Storing the area information indicating the service information indicating the location of the service provided to the user on the memory area in the storage unit, and specifying the predetermined area of the memory area from a predetermined electronic device. A process for selecting, as transmission information, area information and service information stored in a hierarchy below the designated area among the information stored in the storage unit in response to the transmitted information acquisition request; A data transmission program for causing a computer to execute a process of packet-transmitting the selected transmission information to the predetermined electronic device. It can be used as an embodiment of the computer readable recording medium storing the program.

  Further, the embodiment of the data assembly method includes a process of designating a predetermined area of the memory area and transmitting an information acquisition request, and a lower hierarchy area is included in any area of the upper hierarchy. The memory area is divided into a plurality of areas having a hierarchical structure, area information indicating each divided area, service information indicating a position on the memory area of a service provided to the user, and a storage unit for storing By receiving a plurality of packets transmitted from a predetermined electronic device and including a plurality of packets including area information and service information stored in a hierarchy below the area specified in the information acquisition request, Processing for acquiring the plurality of packets, processing for determining whether or not all of the plurality of transmitted packets have been acquired, and processing for the plurality of transmitted packets. If it is determined that all the service information has been acquired, the area of the area indicated by each area information included in the acquired packets and the position of the service indicated by the service information included in the acquired packets in the memory area are described. And a process for hierarchically assembling the acquired area information and service information, and an embodiment of a data assembling program and a computer-readable recording medium storing the program. Can do.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are of course within the technical scope of the present invention. Understood.

  For example, in the above embodiment, the IC chip 200 is given as an example of the second electronic device. However, the present invention is not limited to this. For example, the second electronic device is composed of an IC card incorporating the IC chip. May be. An example of an IC card with a built-in IC chip is not limited to a non-contact type IC card such as FeliCa (registered trademark), but may be a contact type card.

  In the present embodiment, the IC chip 200 is built in the portable information terminal 100. However, the present invention is not limited to this, and the IC chip 200 is attached to the portable information terminal 100 from the outside, for example. May be.

  In the above embodiment, the portable information terminal 100 is described as an example of the first electronic device. However, the portable information terminal 100 may be configured by a reader / writer, for example. Therefore, although the packet communication system between the portable information terminal 100 and the IC chip 200 has been described in the above embodiment, the present invention is not limited to this, and for example, as shown in FIG. A communication system that transmits packets to / from the IC chip 200 built in the information terminal 100 via the wireless interface 500 may be used.

  In this case, an information acquisition request command is output from the processor 310 provided in the reader / writer 300. When communication circuit 320 transmits the command to IC chip 200 via antenna 330 and antenna 260, communication circuit 250 receives this command. In accordance with the command received in this way, packet communication for transmitting node tree data is executed between the reader / writer 300 and the IC chip 200 built in the portable information terminal 100 based on the data transmission method. .

  The present invention can be applied to a communication system and a data transmission device that transmit information in a layer below a specified layer of a memory area while suppressing memory consumption.

1 is an overall configuration diagram of a communication system showing an embodiment of the present invention. It is a functional block diagram which shows the function of the communication system in the embodiment. It is the figure which showed an example of the hierarchical structure in the memory area | region in the embodiment. FIG. 4 is a diagram showing an example of a node tree list corresponding to the hierarchical structure in the memory area of FIG. 3. It is the figure which showed the time chart of the packet in the same embodiment, and the example of a reply packet. It is the flowchart which showed the node tree acquisition routine in the same execution form. It is the figure which showed the time chart of the packet at the time of resending in the same embodiment, and the example of a reply packet. It is the figure which showed the time chart of the packet at the time of the new information acquisition request in the same embodiment, and the example of a reply packet. It is a whole block diagram of another communication system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Communication system 100 Portable information terminal 110 Controller 111 Information acquisition request part 112 Acquisition part 113 Judgment part 114 Assembly part 120 Display 121 Display part 200 IC chip 220 Volatile memory 230 Non-volatile memory 230a Memory area 230b Node tree list 231 Storage part 241 Selection unit 251 Communication unit 250, 320 Communication circuit 260, 330 Antenna 300 Reader / writer 310 Processor 400 Wired interface 500 Wireless interface

Claims (15)

A communication system in which a first electronic device that requests transmission of information and a second electronic device that transmits information stored in a memory area in response to the request are connected:
The first electronic device is;
An information acquisition request unit for designating a predetermined area of the memory area and transmitting an information acquisition request to the second electronic device;
The second electronic device is;
The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. A storage unit for storing service information indicating a position of the service on the memory area;
A selection unit that selects, as transmission information, area information or service information stored in a hierarchy below the designated area, out of information stored in the storage unit, in response to the transmitted information acquisition request; ;
And a communication unit that transmits the transmission information selected by the selection unit to the first electronic device. The communication unit;
The communication system according to claim 1, wherein the transmission information is transmitted for each packet. The communication unit;
Transmission information including a plurality of area information and service information stored in a hierarchy below the designated area is divided into a plurality of packets and transmitted in random order;
The first electronic device further includes:
An acquisition unit for acquiring the plurality of transmitted packets;
A determination unit that determines whether or not all of the plurality of packets have been acquired by the acquisition unit;
When the determination unit determines that all of the plurality of packets have been acquired, the area of the area indicated by each area information included in the acquired packet and the memory area of the service indicated by each service information included in the acquired packet The communication system according to claim 1, further comprising: an assembling unit that hierarchically assembles a plurality of transmitted area information and service information according to the upper position. The first electronic device further includes:
The communication system according to claim 3, further comprising a display unit that displays area information and service information assembled by the assembly unit using a predetermined browser. The information acquisition request unit includes:
Request retransmission of the transmitted packet,
The communication unit
The communication system according to claim 1, wherein the transmitted packet is retransmitted in response to the request. The communication unit
When a new information acquisition request is transmitted by designating a new area by the information acquisition request unit, the transmission of the ongoing packet is stopped and the packet transmission in response to the new information acquisition request is started. The communication system according to claim 1, wherein the communication system is characterized. The communication unit;
The transmission packet includes continuation information indicating whether or not there is a next packet to be transmitted continuously.
The determination unit
4. The communication system according to claim 3, wherein it is determined whether or not all of the plurality of packets have been acquired based on the continuation information.   The communication system according to claim 1, wherein the second electronic device is configured by either an IC chip or an IC card incorporating the IC chip. The area information indicates an area start position and an area end position on the memory area;
The communication system according to claim 1, wherein the service information indicates a position in any area for specifying a service. The start position of the area, the end position of the area, and the position in any area for specifying the service are:
The communication system according to claim 9, wherein the communication area is information indicating a predetermined position of the memory area by coordinates. The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. A storage unit for storing service information indicating a position of the service on the memory area;
In response to an information acquisition request transmitted from a predetermined electronic device by designating a predetermined area of the memory area, the information stored in the storage unit is stored in a hierarchy below the designated area. A selection unit for selecting area information and service information as transmission information;
A data transmission device comprising: a communication unit that packet-transmits transmission information selected by the selection unit to the predetermined electronic device. An information acquisition request unit that designates a predetermined area of the memory area and transmits an information acquisition request;
The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. Service information indicating the location of the service on the memory area and a plurality of packets transmitted from a predetermined electronic device having a storage unit for storing the service information in a hierarchy below the area specified by the information acquisition request An acquisition unit for acquiring the plurality of packets by receiving a plurality of packets including the stored area information and service information;
A determination unit for determining whether or not all of the plurality of transmitted packets have been acquired;
When the determination unit determines that all of the plurality of transmitted packets have been acquired, the area information indicated by each area information included in the acquired plurality of packets and the service information included in the acquired plurality of packets A data assembly device comprising: an assembly unit that hierarchically assembles the acquired area information and service information according to the position of the service indicated in the memory area. A data transmission method for transmitting data between a first electronic device requesting transmission of information and a second electronic device transmitting information stored in a memory area in response to the request:
The first electronic device transmitting a request for acquiring information to the second electronic device by designating a predetermined area of the memory area;
The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. Storing service information indicating a position of the service on the memory area in a storage unit;
In response to the transmitted information acquisition request, the second electronic device obtains area information and service information stored in a hierarchy below the designated area out of information stored in the storage unit. Selecting as transmission information;
Packet-transmitting the selected transmission information to the first electronic device; and a data transmission method comprising: The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. Storing the service information indicating the position of the service on the memory area in the storage unit;
In response to an information acquisition request transmitted from a predetermined electronic device by designating a predetermined area of the memory area, the information stored in the storage unit is stored in a hierarchy below the designated area. Selecting area information and service information as transmission information;
A data transmission program for causing a computer to execute a process of packet-transmitting the selected transmission information to the predetermined electronic device. A process of designating a predetermined area of the memory area and transmitting an information acquisition request;
The memory area is divided into a plurality of areas having a hierarchical structure so that a lower hierarchy area is included in any of the upper hierarchy areas, and area information indicating each divided area is provided to the user. Service information indicating the position of the service on the memory area and a plurality of packets transmitted from a predetermined electronic device having a storage unit for storing the service information in a hierarchy below the area specified by the information acquisition request Processing to obtain the plurality of packets by receiving a plurality of packets including stored area information and service information;
A process of determining whether or not all of the plurality of transmitted packets have been acquired;
When it is determined that all of the plurality of transmitted packets have been acquired, the area of the area indicated by each area information included in the acquired plurality of packets, and the service indicated by each service information included in the acquired plurality of packets are displayed. A data assembling program for causing a computer to execute a process of hierarchically assembling the acquired area information and service information according to the position on the memory area.

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