JP4998886B2 - Communication device and program - Google Patents

Description

  The present invention relates to a communication device and a program, and more particularly to a communication device and a program suitable for using a web application by wireless access.

  Mobile communication terminals such as mobile phones are equipped with various additional functions in addition to the voice call function, which is a basic function, and the function of connecting to a web server via the Internet or the like has become established as a general function. Yes.

  With web access using such functions, various web services can be used even on mobile communication terminals. However, in order to use web services comfortably, a communication connection with a server is established stably. It is a prerequisite. However, in the case of a communication device with position movement, such as a mobile communication terminal, wireless communication with the server may occur due to deterioration of the communication environment due to changes in the radio wave state accompanying movement or out of the communicable range. There may be situations where it is not possible to establish.

  In other words, when wireless access is used with unspecified changes in communication status, it may unexpectedly go offline while using the web service. Service processing is interrupted or ends with an error. As a result, the web service cannot be used unless reconnection or processing is re-executed by a user operation, which is cumbersome for the user and cannot be used comfortably.

As a processing technique at the time of offline, for example, a method as in Patent Document 1 has been proposed, but processing data is acquired in advance assuming processing in a planned offline situation, It does not consider the occurrence of an unspecified offline state specific to wireless access as described above.
JP 2000-231542 A

  As described above, in communication using wireless access, wireless access may not be established unspecifically, and thus web services and the like may not be used comfortably.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a communication device and a program capable of improving the use environment of communication by wireless access.

In order to achieve the above object, a communication apparatus according to the first aspect of the present invention provides:
In a communication device comprising a wireless communication means for performing a transaction with a server by connection by wireless access,
A program acquisition means for acquiring a program that allows a subsequent transaction to be executed locally in the communication device during a transaction with the server by asynchronous communication with the server;
Wireless state detecting means for detecting the state of the wireless access;
Transaction switching means for locally executing the program acquired by the program acquisition means according to the state of the wireless access detected by the wireless state detection means, and switching from a transaction with the server to a transaction within the communication device When,
Transaction recording means for recording a transaction in the communication device;
Synchronization means for synchronizing the transaction in the communication device recorded by the transaction recording means with the server according to the state of the wireless access detected by the wireless state detection means ,
The program acquisition means determines a program range to be acquired according to the state of the wireless access detected by the wireless state detection means, and acquires a program in the determined range.
And wherein a call.

In order to achieve the above object, a communication apparatus according to the second aspect of the present invention provides:
In a communication device comprising a wireless communication means for performing a transaction with a server by connection by wireless access,
A program acquisition means for acquiring a program that allows a subsequent transaction to be executed locally in the communication device during a transaction with the server by asynchronous communication with the server;
Wireless state detecting means for detecting the state of the wireless access;
Transaction switching means for locally executing the program acquired by the program acquisition means in accordance with the state of the wireless access detected by the wireless state detection means, and switching from a transaction with the server to a transaction within the communication device When,
Transaction recording means for recording a transaction in the communication device;
Synchronization means for synchronizing the transaction in the communication device recorded by the transaction recording means with the server according to the state of the wireless access detected by the wireless state detection means,
The program acquisition unit determines a range of transactions that may be executed locally according to the state of the wireless access detected by the wireless state detection unit, and executes a transaction in the determined range To get the
It is characterized by that .

In the communication device,
It is desirable that the program acquisition unit expands the range when the wireless access state is not good .

In the communication device,
In the case where the wireless state detection unit detects the state of the wireless access based on the selection of the wireless communication method by the communication unit, it is preferable to detect whether or not the wireless communication method is switched. ,
It is desirable that the program acquisition unit expands the range when the wireless communication method is switched .

In the communication device,
Preferably, the wireless state detection means detects the state of the wireless access based on a wireless quality indicator of wireless radio waves received by the communication device.

In the communication device,
The wireless communication means desirably performs the wireless access by selectively using a plurality of types of wireless communication methods.
Preferably, the wireless state detection unit detects the state of the wireless access based on selection of a wireless communication method by the wireless communication unit .

In the communication device,
The program acquired by the program acquisition means is preferably a script that is executed in a markup language that is executed in a transaction with the server .

The communication device is preferably a mobile communication terminal .

In order to achieve the above object, a program according to the third aspect of the present invention is:
To a computer that controls a communication device that performs a transaction with a server by wireless connection,
A function of detecting the state of the wireless access;
A function for determining a range of programs to be acquired according to the detected state of the wireless access;
A function of acquiring a program in the determined range that allows a subsequent transaction to be executed locally within the communication device during a transaction with the server by asynchronous communication with the server;
According to the detected state of the wireless access, a function to execute the acquired program locally and switch from a transaction with the server to a transaction in the communication device;
A function of recording a transaction in the communication device in a storage device in the communication device;
A function of synchronizing the recorded transaction in the communication device with the server according to the detected state of the wireless access;
It is characterized by realizing .

In order to achieve the above object, a program according to the fourth aspect of the present invention is:
To a computer that controls a communication device that performs a transaction with a server by wireless connection,
And a function of detecting a state before Symbol wireless access,
A function for determining a range of transactions that may be executed locally according to the detected wireless access state;
A function for acquiring a program for executing a determined range of transactions by asynchronous communication with the server, which enables a subsequent transaction to be executed locally in the communication device during a transaction with the server;
Depending on the state of the detected the wireless access, the pre Quito obtained by programs executed locally, from the transaction with the server, a function for switching the transaction in said communication device,
A function of recording a transaction in the communication device in a storage device in the communication device;
A function of synchronizing the recorded transaction in the communication device with the server according to the detected state of the wireless access;
It is characterized by realizing.

  According to the present invention, a comfortable use environment can be realized regardless of the state of wireless access.

Embodiments according to the present invention will be described below with reference to the drawings. In the embodiment illustrated below, a case where the communication apparatus according to the present invention is realized by a mobile communication terminal is shown. The mobile communication terminal according to each embodiment is, for example, a mobile phone or a PHS (Personal Handyphone).
System), a smartphone, etc., which can perform voice calls and data communication by mobile communication by wireless access. That is, as shown in FIG. 1, a transaction is performed with an external device such as a server (for example, a web server) by connection to a WAN (Wide Area Network) by wireless access of a mobile communication terminal. In the following embodiment, it is assumed that the mobile communication terminal performs a transaction with a web server that provides a web application such as web mail or a data folder service.

(Embodiment 1)
In the first embodiment, a case where the present invention is applied to a mobile communication terminal that performs wireless access using cellular communication, which is a basic function of the mobile communication terminal, will be described. That is, the mobile communication terminal 100 according to the present embodiment performs a transaction with the web server by wireless access to a mobile communication network such as a mobile phone network (hereinafter referred to as “cellular network”). The configuration of such a mobile communication terminal 100 will be described with reference to FIG.

  FIG. 2 is a block diagram showing a configuration of the mobile communication terminal 100 according to the present embodiment. As illustrated, the mobile communication terminal 100 includes a control unit 110, a wireless communication unit 120, a cellular communication unit 121, a wireless state detection unit 130, an interface unit 140, a voice processing unit 150, a storage unit 160, and the like. .

  The control unit 110 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory) serving as a work area, and the like, and each unit of the mobile communication terminal 100 by executing a predetermined operation program. To control. That is, each component of the mobile communication terminal 100 is controlled by the control unit 110, and information transmission between the components is performed via the control unit 110.

  The wireless communication unit 120 is configured to perform wireless access for the mobile communication terminal 100 to perform WAN connection. In the present embodiment, the wireless communication unit 120 performs wireless access to the cellular network (hereinafter referred to as “cellular communication”). The cellular communication unit 121 is configured.

  The cellular communication unit 121 is a device that performs a communication operation by the mobile communication terminal 100. For example, the cellular communication unit 121 includes a communication device using a communication method such as a CDMA (Code Division Multiple Access) method, and the like. Wireless communication is performed with a nearby base station by performing wireless transmission / reception with the antenna 122 corresponding to the communication method. By such an operation of the cellular communication unit 121, WAN connection by wireless access is made, and voice communication and data communication by cellular communication, which are basic functions of the mobile communication terminal 100, are realized.

The wireless state detection unit 130 detects the state of wireless access by the wireless communication unit 120. In the present embodiment, for example, RSSI (Received Signal Strength) used for detecting the sensitivity level of the mobile communication terminal 100.
Assume that the state of wireless access is detected based on an arbitrary wireless quality index such as (Indicator: received signal strength), Ec / Io, frame rate error, and the like. Here, when detecting the state of wireless access using RSSI, the wireless state detection unit 130, for example, a detection circuit that measures the electric field strength or the like based on the received radio wave in the antenna 122 or the reception operation of the cellular communication unit 121, etc. The RSSI obtained by quantifying the measured electric field strength and the like is input to the control unit 110.

  The interface unit 140 has a configuration related to an interface between the mobile communication terminal 100 and its user, and includes, for example, an operation unit 141 and a display unit 142.

  The operation unit 141 includes buttons and keys configured on the outer surface of the mobile communication terminal 100 and is operated by the user of the mobile communication terminal 100. The operation unit 141 includes an input circuit connected to each button, key, and the like, and generates an input signal according to a user operation and inputs the input signal to the control unit 110.

  The display unit 142 is a display output device configured by, for example, a liquid crystal display device, and displays and outputs an image and the like under the control of the control unit 110.

  The audio processing unit 150 includes, for example, a codec circuit for audio data, and performs processing related to audio input and audio output of the mobile communication terminal 100. That is, the reception operation of converting the digital audio data received by the cellular communication unit 121 into an analog audio signal and outputting it from the speaker 151, or the user's speech input from the microphone 152 is converted into the digital audio data and the cellular communication unit The transmission operation to be sent to 121 is performed.

  The storage unit 160 includes a storage device such as a flash memory, for example, and stores various data necessary for realizing the present invention in addition to storing an operation program executed by the control unit 110. In the present embodiment, as shown in FIG. 2, the script storage area 161, the transaction storage area 162, and the program storage area 163 are configured as storage areas.

  The script storage area 161 is an area for storing a script obtained by a transaction with the web server. For example, the web server in the present embodiment provides a web service using an asynchronous communication technology such as Ajax, and the script for the next and subsequent transactions is transferred to the mobile communication terminal 100 by such asynchronous communication. Shall be obtained sequentially. The script acquired here is a script for executing the same operation as the transaction with the web server locally in the mobile communication terminal 100. For example, the script is a markup language (for example, XML ( Extensible Markup Language) etc.). The script storage area 161 stores the script (program) acquired in this way.

  The transaction storage area 162 is an area for recording a local transaction that is performed by executing a script stored in the script storage area 161. In this embodiment, when the wireless access state of the mobile communication terminal 100 is not good, the transaction with the web server is interrupted and switched to a local transaction by executing a script (details will be described later). That is, a local transaction (offline transaction) is performed offline with the web server. The transaction storage area 162 accumulates data (history, input / output data, etc.) related to an offline transaction performed locally while being offline with the web server.

  The program storage area 163 is an area for storing a program executed by the control unit 110. The program storage area stores basic software (so-called OS) for controlling the operation of the entire mobile communication terminal 100, application software for realizing various functions of the mobile communication terminal 100, and the like. In the present embodiment, the control unit 110 executes a program stored in the program storage area 163, thereby realizing a configuration necessary for executing the processing according to the present embodiment.

  In the present embodiment, it is assumed that the function shown in FIG. 3 is realized by the control unit 110 executing the program stored in the program storage area 163. FIG. 3 is a functional block diagram showing functions realized when the mobile communication terminal 100 according to the present embodiment performs a transaction with a web server. As illustrated, the control unit 110 functions as a communication control unit 111, a communication state determination unit 112, a script acquisition unit 113, a transaction switching unit 114, a server synchronization unit 115, and the like.

  The communication control unit 111 controls the wireless communication unit 120 to perform a logical process related to a transaction with a web server through WAN connection for wireless access. In this case, in cooperation with the interface unit 140, output of data obtained by a transaction, a request operation to the web server according to a user operation, and the like are performed. When a transaction with the web server is performed as in the present embodiment, the communication control unit 111 interprets a markup language transmitted from the web server, thereby realizing web display on the display unit 142 and the like.

  The communication state determination unit 112 determines a communication state related to wireless access by the wireless communication unit 120 based on a detection result such as RSSI input from the wireless state detection unit 130. In the present embodiment, RSSI is used as a wireless quality index, and based on RSSI, it is determined whether the state of wireless access in communication with the web server is good, and the determination result is output to the wireless state detection unit 130. To do.

  Here, the case where the state of the wireless access is not good means that there is a risk that the wireless access is interrupted during communication with the web server. In this case, for example, a threshold indicating that there is a high risk that wireless access will be interrupted (wireless access cannot be established) if it further decreases is set on the RSSI value, and the RSSI input from the wireless state detection unit 130 is set. Is close to the threshold value, the communication state determination unit 112 determines that the wireless access may be interrupted, that is, the state of the wireless access deteriorates with time.

  Further, when the RSSI value tends to increase from a state where the wireless access is not good (for example, when the RSSI value is near the threshold or when wireless access cannot be established), the communication state determination unit 112 Then, it is determined that the state of wireless access has been improved over time.

The script acquisition unit 113 controls the wireless communication unit 120 to perform asynchronous communication with the web server, thereby acquiring a script related to the next and subsequent transactions, and stores it in the script storage area 161 of the storage unit 160. The script acquisition unit 113 also determines the range of the script to be acquired from the web server according to the wireless access state input from the communication state determination unit 112, and requests the web server for the determined range of script. In other words, the range of subsequent transactions that may be executed locally is determined according to the state of wireless access, and a script that can execute the determined range of transactions locally is requested from the web server.

  As described above, in the present embodiment, since web access using asynchronous communication technology such as Ajax is assumed, the script acquisition unit 113 uses, for example, a JavaScript (trademark) object such as XMLHttpRequest, so that the communication control unit By making a request to the web server asynchronously with the web display processing or the like by 111, for example, requests and acquisitions of scripts related to subsequent transactions are performed in the background such as a screen display processing related to the current transaction.

  Here, the script acquisition unit 113 changes the range of the script to be acquired (= the range of transactions that may be executed locally) depending on whether or not the wireless access state is good. In this embodiment, when the wireless access state is not good, a range is determined in which scripts corresponding to more transactions than the transactions set when the wireless access state is good are acquired.

  For example, when the wireless access state is good, a script for only the next transaction is acquired. When the wireless access state is not good, scripts for a plurality of subsequent transactions are acquired. That is, n is the number of scripts to be acquired when the wireless access state is good (= the number of transactions that may be executed locally when the wireless access state is good), and the wireless access state is not good. When the number of scripts to be acquired sometimes (= the number of transactions that may be executed locally when the wireless access state is not good) is m, the script acquisition unit 113 inputs from the communication state determination unit 112 The range in which n <m is determined according to the state of wireless access to be performed. That is, when the wireless access state is not good, the range of the script to be acquired (= the range of transactions that can be executed locally) is expanded. The numerical values set for n and m are arbitrary, and each may be a variable value.

  If the transaction switching unit 114 determines that there is an extremely high risk that the wireless access related to the transaction with the web server is interrupted based on the state of the wireless access input from the wireless state detection unit 130, the script acquisition unit 113 By executing the acquired script, a transaction with the web server by wireless access is switched to a local transaction inside the mobile communication terminal 100.

  Here, the state of wireless access when the transaction switching unit 114 switches to a local transaction is a state in which wireless access cannot be established due to, for example, the occurrence of radio interference or the mobile communication terminal 100 being out of the communicable range. (That is, offline). That is, the RSSI value is equal to or less than the above-described threshold value. When such wireless access cannot be established, the transaction switching unit 114 executes the script for the next and subsequent transactions acquired in advance when the wireless access has been established. If the transaction is continued, the transaction that should have been performed with the web server is performed locally in the mobile communication terminal 100, and the transaction is recorded in the transaction storage area 162.

  When switching to such a local transaction, the transaction switching unit 114 performs screen display and input / output operation based on the script being executed in cooperation with the interface unit 140. That is, for the user of the mobile communication terminal 100, the operation is performed as if the transaction with the web server is continuing.

  When switching to a local transaction, the transaction switching unit 114 determines whether wireless access can be established based on an input from the wireless state detection unit 130. Here, when the wireless access can be established, the transaction switching unit 114 terminates the local transaction that has been performed by executing the script and controls the wireless communication unit 120, thereby enabling the web server for wireless access. Try to communicate with again. In other words, the transaction performed locally in the mobile communication terminal 100 is switched to the transaction with the web server through the wireless access WAN connection.

  When the transaction switching unit 114 switches from a local transaction to a transaction with a web server by wireless access, the server synchronization unit 115 accesses the web server in cooperation with the wireless communication unit 120, and stores the transaction storage area. The data concerning the local transaction recorded in 162 is synchronized with the database of the web server. In other words, the web server database is originally updated by a transaction with the web server, but when switching to a local transaction, the web server database could not be updated in real time due to the interruption of the transaction. When access is restored, the record of the transaction while it was interrupted is synchronized with the database of the web server.

In the present embodiment, each function illustrated in FIG. 3 is logically realized by the control unit 110 by executing a program. For example, each of these functions may be an ASIC (Application Specific).
(Integrated Circuit: integrated circuit for specific applications).

  Moreover, each structure mentioned above is a structure required in order to make the mobile communication terminal 100 function as a mobile communication terminal concerning this invention, About other structures concerning a basic function and an additional function as a mobile communication terminal Shall be provided as necessary.

  The operation of mobile communication terminal 100 having the above configuration will be described below. Here, “transaction processing” executed when the mobile communication terminal 100 performs a transaction with a web server that supports asynchronous communication will be described with reference to the flowchart shown in FIG. For example, this transaction process is started when the user of the mobile communication terminal 100 operates the operation unit 141 to instruct access to a web server that supports asynchronous communication.

  That is, the communication control unit 111 controls the wireless communication unit 120 in accordance with an input signal from the operation unit 141, so that the cellular communication unit 121 performs wireless access to the cellular network. With the WAN connection by wireless access, the mobile communication terminal 100 accesses the web server, and for example, a transaction session required for a web application such as web mail is started (step S101).

  When the connection with the web server is established in this manner, the communication control unit 111 displays the web page on the display unit 142 by interpreting the markup language acquired from the web server.

  When such a communication operation for web access is established, the wireless state detection unit 130 measures the RSSI in the wireless communication unit 120 and inputs it to the control unit 110. The communication state determination unit 112 compares the RSSI value input from the wireless state detection unit 130 with a preset threshold value to determine the wireless access state as needed, and the determination result is transmitted to the script acquisition unit 113. The transaction switching unit 114 is notified.

  The script acquisition unit 113 is a range of scripts (scripts for executing subsequent transactions) acquired from the web server according to the wireless access state (good or not) based on the notification from the communication state determination unit 112 (= Range of transactions that may be executed locally) is determined (step S102), and a script corresponding to the determined range is requested and acquired from the web server by asynchronous communication (step S103). The script acquisition unit 113 stores the script acquired by asynchronous communication in the script storage area 161 (step S104).

  The transaction switching unit 114 determines whether wireless access cannot be established based on the notification from the communication state determination unit 112 (step S104). Here, if the wireless access can be maintained (step S105: No) and the session end event has not occurred (step S110: No), the transaction with the web server can be performed by repeating the processing of steps S102 to S104. Continue.

  On the other hand, for example, when the radio wave state fluctuates with the movement of the mobile communication terminal 100 or the position of the mobile communication terminal 100 goes out of the coverage area of the cellular communication, the threshold value set by the RSSI value decreases. May be: In such a case, the transaction switching unit 114 determines that the wireless access that has been performed with the web server so far cannot be maintained (step S105: Yes). That is, the previous online state cannot be maintained, and the offline state is entered.

  In this case, the transaction switching unit 114 accesses the script storage area 161 and executes a script acquired in advance before going offline, so that a transaction originally performed with the web server can be performed in mobile communication. This is performed by local processing inside the terminal 100 (step S106). That is, the transaction is switched from a transaction with a web server by wireless access to a local transaction in the mobile communication terminal 100. In this case, the transaction switching unit 114 records the address information of the web server related to the current transaction in the storage unit 160. In addition, when wireless access cannot be established, the session normally ends. However, in this embodiment, it is assumed that the session started in step S101 is continued by switching to a local transaction. Operate.

  In the local transaction, the operation of the web application provided by the web server is continued locally by the screen display based on the executed script and the input by operating the operation unit 141, and data input / output associated with the use of the web application Is done. The transaction switching unit 114 records such data input / output in the transaction storage area 162 as needed.

  While such a local transaction is being performed, the wireless state detection unit 130 measures RSSI as needed, and the communication state determination unit 112 determines the state of wireless access and notifies the transaction switching unit 114. Based on the notification from the communication state determination unit 112, the transaction switching unit 114 determines at any time whether or not the wireless access that could not be established has been recovered (step S108).

  Here, if the wireless access state does not recover (step S108: No), the local transaction operation is continued by the processing of step S106 and step S107.

  On the other hand, when the wireless access state is recovered (step S108: Yes), the transaction switching unit 114 notifies the server synchronization unit 115 to that effect. The server synchronization unit 115 controls the wireless communication unit 120, accesses the web server based on the web server address information recorded when switching to the local transaction, and the local recorded by the transaction switching unit 114. By transmitting the transaction record to the web server, the local transaction in the mobile communication terminal 100 and the database of the web server are synchronized (step S109). Thereby, since the transaction during the offline state is reflected on the web server, the transaction with the web server can be continued even after the wireless access is restored.

  When the session is continued after the synchronization with the web server is completed by such wireless access recovery (step S110: No), the transaction switching unit 114 switches from the local transaction to the transaction with the web server. In this case, the transaction switching unit 114 instructs the communication control unit 111 to continue the transaction with the web server. The communication control unit 111 resumes the transaction with the web server by controlling the wireless communication unit 120 in accordance with the instruction from the transaction switching unit 114, and the processes after step S102 are performed.

  And this process is complete | finished with the session end with the web server by generation | occurrence | production of a session end event (step S110: Yes).

  As described above, according to this embodiment, even when wireless access cannot be established during a transaction with a web server, the user of the mobile communication terminal 100 can continue the process without interrupting the operation. it can.

  For example, when the mobile communication terminal 100 performs the above-described operation while using web mail, if the wireless access to the web server is not established and the offline state is established, the script acquired in advance is executed. A web mail operation screen is displayed on the mobile communication terminal 100, and when the user operates the operation unit 141, for example, instructions such as browsing, replying, and transmission are input. However, since communication with the web server has not been established, operation content, input content, and the like are stored in the transaction storage area 162 in the mobile communication terminal 100. For example, when the instruction here is “transmission”, the mobile communication terminal 100 displays the same screen as when it is actually transmitted by the local transaction operation, but it is actually offline because it is offline. Is not transmitted and is recorded in the transaction storage area 162.

  Then, by synchronizing with the web server when the online state is entered, the recorded transmission operation is stored in the database of the web server, whereby the actual transmission operation is performed from the web server. That is, the transmission operation performed while offline is performed at a timing synchronized with the database of the web server.

  In a conventional mobile communication terminal, if wireless communication cannot be established during web access, the processing is interrupted from that point, and it is necessary to perform reconnection or input operation again by a user operation. The processing according to the present embodiment also causes a time lag instead of real-time processing. However, since the user performs the same operation as when the communication state is good, there is no need to interrupt or redo the operation. The amount of time required for the user to operate is reduced and the psychological stress is reduced as the user operation is unnecessary. Can be realized.

(Embodiment 2)
A case where the present invention is applied to a mobile communication terminal (so-called dual mode terminal) that can selectively use a plurality of types of wireless systems for wireless access for WAN connection will be described below as a second embodiment.

  As shown in FIG. 5, the mobile communication terminal 100 according to the present embodiment is a dual mode terminal that can selectively use cellular communication and wireless LAN. In this case, as shown in FIG. 5, it is assumed that the WAN connection can be made using any wireless system.

  The configuration of such a mobile communication terminal 100 will be described with reference to FIG. FIG. 6 is a block diagram showing a configuration of the mobile communication terminal 100 according to the present embodiment. In addition, about the structure same as the mobile communication terminal 100 illustrated in Embodiment 1, the same referential mark is attached | subjected and the detailed description is abbreviate | omitted. Therefore, in the present embodiment, only a configuration different from the configuration illustrated in the first embodiment will be described.

  The difference from the mobile communication terminal 100 according to the first embodiment shown in FIG. 2 is the configuration of the wireless communication unit 120. As shown in FIG. 6, the radio communication unit 120 of the mobile communication terminal 100 according to the present embodiment includes a non-cellular communication unit 123 in addition to the cellular communication unit 121 in order to realize a dual mode terminal.

  The non-cellular communication unit 123 is configured to perform wireless access using a wireless communication method different from the cellular communication performed by the cellular communication unit 121. In this embodiment, the non-cellular communication unit 123 is configured to realize access to the wireless LAN. That is, the non-cellular communication unit 123 includes, for example, a wireless LAN communication module compliant with the IEEE802.11 wireless LAN standard and the like, and controls radio wave transmission / reception by the antenna 124, thereby providing a predetermined wireless LAN access point. Wireless communication. In this embodiment, it is assumed that a wireless LAN is used for access to a LAN (Local Area Network) connected to a WAN such as an IP network. That is, the WAN connection by wireless access is realized by the operation of the non-cellular communication unit 123.

  In the wireless communication unit 120 having such a configuration, the cellular communication unit 121 and the non-cellular communication unit 123 are selectively operated to perform WAN connection selectively using cellular communication and a wireless LAN. In this case, the wireless state detection unit 130 detects the wireless state of cellular communication by the cellular communication unit 121 and wireless LAN communication by the non-cellular communication unit 123.

  In this embodiment, the communication method for performing communication related to web access is to selectively use either cellular communication or wireless LAN. However, even if communication is performed using one wireless method, It is assumed that the wireless state relating to the communication method is being detected. In other words, the wireless state is detected by performing a reception operation intermittently even for unused wireless systems. In this case, the wireless state detection unit 130 also detects a wireless state by measuring an arbitrary wireless quality index (RSSI, electric field strength, etc.) for wireless LAN communication. In the present embodiment, RSSI is used as an index for detecting the wireless state of the wireless LAN.

  In the control unit 110 to which the detection result by the operation of the wireless state detection unit 130 is input, the state of wireless access is determined by the communication state determination unit 112 as in the case of the first embodiment. In the present embodiment, not only the wireless communication method being used, but also the operation of comparing and determining the state of wireless access among a plurality of available wireless communication methods is performed.

  Based on such a determination operation, the mobile communication terminal 100 according to the present embodiment preferentially performs WAN connection by wireless LAN when the mobile communication terminal 100 is within an available wireless LAN area. In other words, when the wireless LAN can be connected during web access by cellular communication, even if the wireless access state of cellular communication is good, the wireless LAN communication is switched to continue web access. . In such wireless system switching, for example, handover between different wireless communication systems is performed by using a related technology of FMC (Fixed Mobile Convergence) such as UMA (Unlicensed Mobile Access).

  That is, when the wireless LAN becomes available, an operation for handing over to the wireless LAN is performed. The script acquisition unit 113 realized by the control unit 110 according to the present embodiment determines the range of scripts to be acquired (= possibility of executing locally) depending on whether or not such a handover operation may be performed. Different transaction scopes). In this embodiment, when there is a possibility that a handover operation is performed, the script acquisition unit 113 expands the range of scripts to be acquired (= the range of transactions that can be executed locally) than usual.

  The operation of the mobile communication terminal 100 as such a dual mode terminal will be described below. Here, “handover processing” executed when the mobile communication terminal 100 according to the present embodiment performs handover from cellular communication to wireless LAN communication will be described with reference to the flowchart shown in FIG. This handover process is executed intermittently every predetermined time in parallel with the process related to the web access, for example, when the web access by the cellular communication is performed.

  When the process is started, the communication state determination unit 112 determines whether or not the wireless LAN is available based on the detection result from the wireless state detection unit 130 (step S201). Here, it is determined whether or not the wireless LAN is available based on the RSSI indicating the intensity of the received radio wave related to the predetermined wireless LAN communication.

  If the wireless LAN cannot be used (step S201: No), this process is terminated, and web access by cellular communication performed in parallel is continued. This process is executed again after a predetermined time has elapsed.

  On the other hand, when the wireless LAN is available (step S201: Yes), the communication state determination unit 112 notifies the script acquisition unit 113 to that effect. When the script acquisition unit 113 receives a notification that the wireless LAN is available from the communication state determination unit 112, the script acquisition unit 113 records the address information of the web server related to the current transaction in the storage unit 160 and the like, and the range of the acquired script The range (= range of transactions that can be executed locally) is determined to be larger than normal (step S202). The script acquisition unit 113 controls the wireless communication unit 120 (cellular communication unit 121), requests an expanded range of script from the web server by asynchronous communication, and stores the acquired script in the script storage area 161 (step S203). .

  The range of the script determined here (= the range of transactions that can be executed locally) is, for example, only acquiring the script necessary to execute the immediately following transaction in the normal communication state In some cases, when the wireless LAN becomes available, the next and subsequent transactions can be executed.

  When the acquisition of the script in such an enlarged range is completed (step S204: Yes), the script acquisition unit 113 notifies the transaction switching unit 114 to that effect. In response to the notification from the script acquisition unit 113, the transaction switching unit 114 executes the script stored in the script storage area 161 in step S203, so that the mobile communication terminal 100 can execute the transaction with the web server by cellular communication. Is switched to a local transaction (step S205), and the transaction is recorded in the transaction storage area 162 (step S206).

  In response to the completion of script acquisition, the transaction switching unit 114 controls the wireless communication unit 120 (the cellular communication unit 121 and the non-cellular communication unit 123), and starts a handover operation from the cellular communication to the wireless LAN communication. (Step S207). This handover operation is performed using, for example, the UMA mechanism.

  Then, when the handover from the cellular communication to the wireless LAN communication is completed (step S208: Yes), the transaction switching unit 114 notifies the server synchronization unit 115 to that effect. The server synchronization unit 115 controls the non-cellular communication unit 123 of the wireless communication unit 120, accesses the web server by wireless LAN communication based on the web server address information recorded in the storage unit 160, and the transaction is performed in step S206. The transaction recorded in the storage area 162 is synchronized with the database of the server (step S209).

  That is, if it is determined that wireless LAN communication is possible based on the state of wireless access, the transaction with the web server is switched to the local transaction in the mobile communication terminal 100, and the handover operation is completed along with the completion of the handover operation. Synchronization with the web server is performed by subsequent wireless LAN communication.

  When the synchronization with the web server is completed, the server synchronization unit 115 notifies the transaction switching unit 114 to that effect. The transaction switching unit 114 switches from a local transaction to a transaction with the web server in response to synchronization with the web server. In this case, the communication control unit 111 controls the non-cellular communication unit 123 of the wireless communication unit 120, so that the transaction with the web server via the wireless LAN is continued (step S210), and the transaction is switched at the time of handover. The process ends.

  According to the present embodiment that performs such processing, the wireless LAN can be used in the middle of a transaction with a web server by cellular communication when priority is given to the use of wireless LAN communication for reasons such as communication cost advantages. In this case, during the handover operation from the cellular communication to the wireless LAN, the transaction is switched to a local transaction, and when the handover is completed, the local transaction is synchronized with the web server. The use of a web application or the like can be continued without interrupting the user's operation, and a comfortable use environment can be realized while taking advantage of the dual mode terminal.

  As described above, by applying the present invention as in the above-described embodiment, a script that allows a subsequent transaction to be executed locally when a transaction with a server is performed by wireless access whose communication state is not always constant. (Program) is acquired from the server by asynchronous communication at the time of transaction, and switched to a local transaction according to the state of wireless access, so even if a situation where communication with the server cannot be established during the transaction with the server, The transaction can be continued without causing interruption or error termination, and a comfortable use environment can be realized regardless of whether the communication state is good or bad. In particular, it is suitable for a communication device such as a mobile communication terminal in which the wireless access state is likely to change unspecifically due to a change in radio wave state accompanying movement.

  In this case, for example, by detecting the state of wireless access based on a wireless quality index such as RSSI, for example, when the communication with the web server is interrupted because the radio wave state is not good, Since the transaction can be continued using the placed script, a comfortable use environment can be realized even when the communication environment changes unspecifically.

  In addition, since a script that can be used by being embedded in a markup language is acquired from the server in order to perform a local transaction, the local transaction can be easily executed. Since such a script is acquired by asynchronous communication in each transaction, screen display processing or the like is not interrupted for acquiring the script. That is, a comfortable usage environment without stress can be realized even during normal communication in which wireless access is established.

  Furthermore, if the wireless access status is not good, the range of scripts acquired by asynchronous communication (= range of transactions that can be executed locally) is expanded, so the wireless access status tends to deteriorate, for example. If it can be predicted that communication interruption will occur, a script that can execute more transactions can be acquired in advance, so sufficient transactions must be performed locally while transactions with the server cannot be performed. Can do. By such an operation, the amount of script acquired by asynchronous communication can be increased only when there is a possibility that wireless access cannot be established, otherwise the minimum amount of script can be acquired. Continuous transactions can be performed without increasing more than necessary.

  In addition, when a plurality of wireless communication methods such as a dual mode terminal can be selectively used, a local transaction is performed according to switching of the wireless communication method to be used. For example, handover associated with switching of the wireless communication method is performed. By switching to a local transaction sometimes, even if such a handover occurs during a transaction with the server, the transaction can be continued without causing interruption or error termination.

  In this case, when it is predicted that the switching of the wireless communication system will occur, the range of scripts to be acquired (= the range of transactions that can be executed locally) is expanded. Even in such a case, the transaction can be continued. In particular, if a handover occurs in the middle of a transaction with a server, unlike a handover during a voice call, redirection to the server is required, so a normal handover operation does not interrupt the transaction. Difficult to continue. Therefore, the service can be used without interrupting the user process by switching to the local transaction during the handover operation.

  The said embodiment is an example and the application range of this invention is not restricted to this. That is, various applications are possible, and all embodiments are included in the scope of the present invention.

  For example, in the above-described embodiment, cellular communication is exemplified as an example of wireless communication. However, as long as a transaction is performed by wireless communication, the type and method of wireless communication are arbitrary. Therefore, a plurality of wireless communication methods that can be used in the dual mode terminal exemplified in the second embodiment are also arbitrary, and are not limited to cellular communication and wireless LAN.

  In the second embodiment, the case where the handover to the wireless LAN communication is performed during the transaction in the cellular communication is illustrated. However, the hand shown in the second embodiment is also used in the case where the handover to the cellular communication is performed during the transaction in the wireless LAN communication. Transactions can be switched by a process similar to the over process.

  In the above embodiment, a case where a web application such as web mail or a data folder service is used by wireless access is exemplified. However, if a transaction is performed with a server by wireless access, the type of service to be used is arbitrary. is there.

  Moreover, although the case where RSSI was employ | adopted was demonstrated in the said embodiment as an example of a radio | wireless quality parameter | index, if the generation | occurrence | production of a communication interruption | blocking can be estimated, the radio | wireless quality parameter | index used for discrimination of a radio | wireless state will not be restricted to RSSI, but arbitrary It is.

  In the above embodiment, the script is acquired by asynchronous communication with the web server. However, as long as a transaction can be executed locally, the acquired program is not limited to the script and is arbitrary.

  In addition, although the case where the communication apparatus concerning this invention was implement | achieved with the mobile communication terminal was illustrated in the said embodiment, this invention is applicable not only to a mobile communication terminal but to arbitrary apparatuses. That is, a PDA (Personal Digital Assistants: personal digital assistant) or a personal computer having a configuration corresponding to the wireless communication unit 120 included in the mobile communication terminal 100 described above may be used as the communication apparatus according to the present invention.

  Further, like the mobile communication terminal 100 described above, an existing mobile body that does not have these functions can be provided by applying a program as well as being provided as a communication apparatus that has functions for realizing the present invention in advance. A communication terminal or other communication device can also function as the communication device according to the present invention.

  In this case, a computer (such as a CPU) that controls the apparatus by applying a program similar to the program realizing the functions of the mobile communication terminal 100 described above to an existing mobile communication terminal or other communication apparatus. By executing the program, it can function as a communication device according to the present invention.

  The application method of such a program is arbitrary. For example, the program can be applied to an arbitrary device by providing it via a communication medium such as the Internet, and a predetermined recording medium (for example, a memory card, a CD-ROM, a DVD, Etc.) can also be applied by storing and distributing the program.

It is a figure for demonstrating the connection to the server by the wireless access of the mobile communication terminal concerning Embodiment 1 of this invention. It is a block diagram which shows the structure of the mobile communication terminal shown in FIG. It is a functional block diagram which shows the function structure implement | achieved by the control part shown in FIG. It is a flowchart for demonstrating the "transaction process" concerning Embodiment 1 of this invention. It is a figure for demonstrating the connection to the server by the wireless access of the mobile communication terminal concerning Embodiment 2 of this invention. It is a block diagram which shows the structure of the mobile communication terminal shown in FIG. It is a flowchart for demonstrating the "handover process" concerning Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Mobile communication terminal, 110 ... Control part, 111 ... Communication control part, 112 ... Communication state discrimination | determination part, 113 ... Script acquisition part, 114 ... Transaction switching part, 115 ... Server synchronization part, 120 ... Wireless communication part, 121 ... cellular communication unit, 122 ... antenna, 123 ... non-cellular communication unit, 124 ... antenna, 130 ... wireless state detection unit, 140 ... interface unit, 141 ... operation unit, 142 ... display unit, 150 ... audio processing unit, 151 ... Speaker, 152 ... Microphone, 160 ... Storage unit, 161 ... Script storage area, 162 ... Transaction storage area, 163 ... Program storage area

Claims (10)

In a communication device comprising a wireless communication means for performing a transaction with a server by connection by wireless access,
A program acquisition means for acquiring a program that allows a subsequent transaction to be executed locally in the communication device during a transaction with the server by asynchronous communication with the server;
Wireless state detecting means for detecting the state of the wireless access;
Transaction switching means for locally executing the program acquired by the program acquisition means according to the state of the wireless access detected by the wireless state detection means, and switching from a transaction with the server to a transaction within the communication device When,
Transaction recording means for recording a transaction in the communication device;
Synchronization means for synchronizing the transaction in the communication device recorded by the transaction recording means with the server according to the state of the wireless access detected by the wireless state detection means ,
The program acquisition means determines a program range to be acquired according to the state of the wireless access detected by the wireless state detection means, and acquires a program in the determined range.
Communication device comprising a call. In a communication device comprising a wireless communication means for performing a transaction with a server by connection by wireless access,
A program acquisition means for acquiring a program that allows a subsequent transaction to be executed locally in the communication device during a transaction with the server by asynchronous communication with the server;
Wireless state detecting means for detecting the state of the wireless access;
Transaction switching means for locally executing the program acquired by the program acquisition means according to the state of the wireless access detected by the wireless state detection means, and switching from a transaction with the server to a transaction within the communication device When,
Transaction recording means for recording a transaction in the communication device;
Synchronization means for synchronizing the transaction in the communication device recorded by the transaction recording means with the server according to the state of the wireless access detected by the wireless state detection means ,
The program acquisition unit determines a range of transactions that may be executed locally according to the state of the wireless access detected by the wireless state detection unit, and executes a transaction in the determined range To get the
Communication device comprising a call. The program acquisition means expands the range when the state of the wireless access is not good.
The communication apparatus according to claim 1 or 2 , wherein The wireless state detection unit detects whether or not the wireless communication method is switched when detecting the state of the wireless access based on the selection of the wireless communication method by the communication unit;
The program acquisition means expands the range when the wireless communication method is switched.
The communication device according to any one of claims 1 to 3 , wherein The wireless state detection means detects the state of the wireless access based on a wireless quality indicator of wireless radio waves received by the communication device;
The communication apparatus according to any one of claims 1 to 4, wherein the communication apparatus is characterized in that: The wireless communication means performs the wireless access by selectively using a plurality of types of wireless communication methods,
The wireless state detection means detects the state of the wireless access based on selection of a wireless communication method by the wireless communication means;
The communication apparatus according to any one of claims 1 to 5, wherein The program acquired by the program acquisition means is a script that is executed by being embedded in a markup language that is executed in a transaction with the server.
Communication apparatus according to any one of claims 1 to 6, characterized in that. The communication device is a mobile communication terminal.
Communication apparatus according to any one of claims 1 to 7, characterized in that. To a computer that controls a communication device that performs a transaction with a server by wireless connection,
And a function of detecting a state before Symbol wireless access,
A function for determining a range of programs to be acquired according to the detected state of the wireless access;
A function of acquiring a program in the determined range that allows a subsequent transaction to be executed locally within the communication device during a transaction with the server by asynchronous communication with the server;
Depending on the state of the detected the wireless access, the pre Quito obtained by programs executed locally, from the transaction with the server, a function for switching the transaction in said communication device,
A function of recording a transaction in the communication device in a storage device in the communication device;
A function of synchronizing the recorded transaction in the communication device with the server according to the detected state of the wireless access;
A program characterized by realizing. To a computer that controls a communication device that performs a transaction with a server by wireless connection,
And a function of detecting a state before Symbol wireless access,
A function for determining a range of transactions that may be executed locally according to the detected wireless access state;
A function for acquiring a program for executing a determined range of transactions by asynchronous communication with the server, which enables a subsequent transaction to be executed locally in the communication device during a transaction with the server;
Depending on the state of the detected the wireless access, the pre Quito obtained by programs executed locally, from the transaction with the server, a function for switching the transaction in said communication device,
A function of recording a transaction in the communication device in a storage device in the communication device;
A function of synchronizing the recorded transaction in the communication device with the server according to the detected state of the wireless access;
A program characterized by realizing.

Images