JP4697594B2 - PDP context control system, method, program, and portable terminal - Google Patents

Description

  The present invention relates to a portable terminal that performs packet communication with a GGSN (Gateway GRRS Support Node). In particular, the present invention relates to a PDP context control system, method, program, and portable terminal that can limit the number of connected portable terminals in providing a packet communication service and prevent an increase in overhead.

  FIG. 8 is a sequence for explaining a series of operations of PDP context control which is a premise of the present invention. Prior to the packet communication service, as shown in this figure, the mobile terminal GGSN (Gateway GRRS Support Node) is connected to PGP (Packet Data Protocol) -Context (context) as an opportunity. -A PDP-Request packet is transmitted to request the start of communication.

The PDP context is a logic circuit defined by 3GPP (Third Generation Partnership Projects).
In addition, the GGSN controls access to the Internet provider for connection notification, incoming notification, etc., management of data communication addresses assigned to mobile terminals required for packet communication, and inquiry control of mobile terminal location at the time of incoming calls It is well known to perform

An active-PDP-Response packet is transmitted from the GGSN to the mobile terminal, and communication start confirmation is performed. At this time, an IP (Internet Protocol) address used in the packet communication service is notified from the GGSN to the mobile terminal.
A TCP (Transmission Control Protocol) Connection Open packet is transmitted from the portable terminal to the GGSN, and a TCP connection establishment notification is made by a three-way handshake.

Packet communication (Packet Communication) is performed between the mobile terminal and the GGSN.
When the application on the mobile terminal ends, a TCP Connection Close packet is transmitted from the mobile terminal to the GGSN.
The mobile terminal has its own mobile terminal-side PDP context disconnect timer, and the mobile terminal-side PDP context disconnect timer is set with a predetermined disconnect time, starts simultaneously with the transmission of the TCP Connection Close packet, and is the same after the application ends. The packet non-communication state until the start of the application is monitored, and when the predetermined packet disconnection time elapses, a deactive-PDP-Request packet is transmitted from the mobile terminal to the GGSN, and the communication is terminated. Be notified.

The GGSN has a T3 timer, and the T3 timer stipulates that the process for disconnecting the PDP context is T3 time. The T3 timer starts simultaneously with the reception of a TCP Connection Close packet, and similarly monitors the packet non-communication state. To do.
In this case, the T3 time defined in the T3 timer is normally set to a value larger than the predetermined disconnection time set in the mobile terminal side PDP context disconnection timer. As an example, a fixed value of about 10 minutes is set for the disconnection time of the mobile terminal side PDP context disconnection timer and the T3 time of the T3 timer.

When a deactive-PDP-Request packet is transmitted from the mobile terminal to the GGSN, the end of communication is notified, and when the T3 timer in the GGSN has elapsed only T3, a deactive-PDP-Response packet is transmitted from the GGSN to the mobile terminal. Is transmitted to confirm the end of communication.
In the portable terminal, the PDP context is disconnected.

  As described above, the PDP context disconnection is not performed immediately after the end of the application on the mobile terminal side, but the PDP context disconnection is performed after a predetermined disconnection time. This is because, since the PDP context connection is performed again at the next packet communication, the overhead at the start of the communication is increased, which gives the user a feeling of overhead and is not preferable.

However, due to the disconnection time until the PDP context disconnection is performed, in the case of an application that does not require the restart of the same application immediately after performing the PDP context disconnection, a useless packet no-signal state continues only for the disconnection time. There is a problem that the number of connected portable terminals is limited in providing a packet communication service.
There are the following prior arts in the technical field on which the present invention is based.

  Conventionally, in data communication using wireless communication, the inactivity timer value is switched according to various situations, thereby reducing the non-communication time of the communication line and increasing the line utilization efficiency. A means for discriminating the application of packet data to be transmitted / received by the radio base station controller is provided, or an inactivity timer value is set according to the communication content by the port number and traffic pattern in the TCP / UDP header, There is one that controls switching from an active state to a dormant state using an activity timer value (see, for example, Patent Document 1).

Further, in paragraphs 0014 and 0047 of Patent Document 1, the timer value for releasing the wireless line is set according to the application type, but the overhead for the PDP context disconnection is prevented and the packet is prevented. In providing a communication service, the number of connected portable terminals cannot be limited.
Also, conventionally, in a packet switched network (NW), a method for optimizing the transfer of information between one or more applications operating in a mobile terminal (MT) and the packet switched network (NW) There are at least two PDP contexts available, they have at least partly different data transfer characteristics, and the PDP context can provide at least partly different quality of service for the transfer of information, When the quality of service specified for a connection changes, based on the characteristics of the PDP context available in the packet switched network (NW), which PDP context is used by the application connection whose quality of service has changed Is appropriate Is, of the PDP context, the data transfer properties, one closest to the changed quality of service while others are selected for the application connection (e.g., see Patent Document 2).

Furthermore, in paragraphs 0033 and 0034 of Patent Document 2 above, the user presets data transfer parameters corresponding to the application that activates the PDP context. However, as described above, overhead is increased for PDP context disconnection. It is not possible to limit the number of connected portable terminals in preventing packet loss and providing packet communication services.
Conventionally, a relay device that relays communication between the first communication device and the second communication device in order to provide a relay device that can prevent unintended session disconnection by the NAT function and that can effectively use address resources. A conversion unit that converts a transmission source address of a packet received from the first communication device from a first address that is an address of the first communication device to a second address that is an address managed by the relay device; A storage unit that stores the first address and the second address in association with each other, a determination unit that determines whether or not the session between the first communication device and the second communication device has ended, and a determination unit When it is determined that the session between the first communication device and the second communication device has ended, the correspondence between the first address and the second address stored in the storage unit is canceled and the second address is released. While others and a releasing unit that (for example, see Patent Document 3).

Further, in paragraph 0044 of Patent Document 3 described above, a period for confirming whether or not the session between the personal computer and the server has ended is determined according to the type of the packet. However, it is not possible to limit the number of connected portable terminals in preventing packet overhead and providing a packet communication service.
Conventionally, when data communication is performed between the center and the terminal, the communication protocol is dynamically switched and optimal charging is performed. Therefore, the threshold value of the optimal data amount of each protocol is preliminarily calculated on the terminal side. When acquiring data as data, and communicating data with the center, the length of the data sent from the center is acquired, and the optimal protocol recognition device determines the optimal protocol according to the data length. The terminal automatically receives the data using the optimal protocol, performs data communication with the center, and automatically uses a communication protocol that charges the user as cheaply as possible according to the data traffic. Some devices can perform communication by discrimination (see, for example, Patent Document 4).

  Furthermore, in paragraphs 0022, 0025, 0030, and 0037 of Patent Document 4, the mobile phone sets a timer time including an optimal connection time interval according to the protocol type. Therefore, it is not possible to limit the number of connected portable terminals in preventing the overhead from increasing and providing the packet communication service.

JP 2003-037874 A Special table 2003-508987 gazette JP 2003-198587 A JP 2000-151702 A

  Therefore, in view of the above-described problems, the present invention prevents a PDP context disconnection from increasing overhead and can limit the number of connected portable terminals in providing a packet communication service. An object is to provide a portable terminal.

In order to solve the above problems, the present invention solves the above problems by performing overhead processing with a GGSN when connecting a PDP context by starting an application, and disconnecting the PDP context after a predetermined time from the end of the application. The application manager unit that identifies a plurality of applications stored in the mobile terminal and manages the currently used application, and the plurality of applications stored in the application unit, the same application from the end of each application Save the cutting time short PDP context for a relatively long packet no-communication time application according to the type of the long and short in based application packet no-communication time until restarting When storing a disconnection time of a long PDP context for an application with a relatively short no-communication time and processing disconnection of a connected PDP context, it is managed and used by the application manager unit after the application is terminated Start the PDP context disconnect time for the application, disconnect the PDP context after the PDP context disconnect time elapses, and resume if the same application is resumed after the application ends and before the PDP context disconnect time elapses There is provided a PDP context control system comprising a PDP manager unit that waits for the end of an application and restarts the disconnection time of the PDP context.

Further, the PDP manager unit shortens the PDP context disconnection time for an application having a relatively long packet non-communication state, and a PDP context for an application having a relatively short packet non-communication state. The disconnection time of the PDP context is changed so that the disconnection time becomes longer.
Further, the PDP manager unit shortens the PDP context disconnection time for a mail application with a relatively long packet non-communication state, and for a browser application with a relatively short packet non-communication time. Increase the disconnection time of the PDP context.

Further, the PDP manager unit captures the application manager unit.
Furthermore, the present invention saves in a portable terminal in a PDP context control method for a portable terminal that performs overhead processing when connecting a PDP context at the start of an application with the GGSN and disconnects the PDP context after a predetermined time from the end of the application. Identifying a plurality of applications to be managed and managing currently used applications, and for the plurality of stored applications, based on the length of time of no packet communication from the end of each application to the restart of the same application Save the disconnection time of short PDP context for a relatively long packet no-communication time applications depending on the application type of the long PDP context for a relatively short no-communication time application Of a step of storing the cutting time, when handling disconnection PDP contexts connected, the start and PDP context disconnection time of the PDP context for the application that is currently being managed used by the application manager unit after the application terminates When the PDP context is disconnected after the disconnection time elapses and the same application is resumed after the application ends and before the PDP context disconnection time elapses, the PDP context disconnection time is reset after the restarted application is terminated. providing PDP context control method characterized by comprising the step of starting.

Furthermore, the present invention provides a program for executing a PDP context control of a mobile terminal that performs overhead processing when a PDP context is connected to the GGSN at the start of an application and disconnects the PDP context after a predetermined time from the end of the application by a computer. The procedure for identifying a plurality of applications stored in the mobile terminal and managing the currently used application, and for the plurality of stored applications, no communication from the end of each application to the resumption of the same application Save the disconnection time of short PDP context for a relatively long packet no-communication time application according to the type of application based on the length of time, relatively short no-communication time applications Long and procedures for storing the cutting time of the PDP context, when handling disconnection PDP context connected is managed by the application manager unit after the application terminates the cutting time of the PDP context for the application that is currently used for When the PDP context disconnection time elapses, the PDP context is disconnected, and when the same application is resumed after the application is terminated and before the PDP context disconnection time elapses, the PDP context waits for the termination of the resumed application. There is provided a program for executing PDP context control on a computer, characterized by comprising a procedure for restarting a context disconnection time .

Furthermore, the present invention provides an application unit for storing a plurality of applications in a mobile terminal that performs overhead processing when connecting to a GGSN when a PDP context is connected by starting an application, and disconnects the PDP context after a predetermined time from the end of the application. An application manager unit for identifying a plurality of applications stored in the application unit and managing an application currently used; and for the plurality of applications stored in the application unit, the same application from the end of each application short PDP context for a relatively long packet no-communication time application according to the type of the long and short in based application packet no-communication time until restarting The cutting time was saved, and the disconnection timer storage unit for storing the cutting time longer PDP context for relatively short non-communication time applications, when processing cutting PDP context connected, said after the application terminates A PDP context disconnection timer for starting a PDP context disconnection time for an application managed by the application manager unit and disconnecting the PDP context after elapse of the PDP context disconnection time ; characterized in that it comprises a PDP manager unit to restart the cutting time of the PDP context after completion of the application that resumed when the same application before the elapse of the cut time is restarted To provide a mobile terminal.

  As described above, according to the present invention, in a PDP context control method for a mobile terminal that connects and disconnects a PDP context with a GGSN, a plurality of applications stored in the mobile terminal are identified and currently used. For applications that manage a long period of no-communication status based on the length of no-communication time from the end of each application to the restart of the same application for multiple saved applications Stores a short PDP context disconnection time, saves a long PDP context disconnection time for applications with a relatively short packet no-communication time, and saves the disconnection time stored for the currently used application. Take out and currently used Since the PDP context is disconnected after the elapse of the disconnection time of the PDP context taken out from the end of the current application, the disconnection timer value on the mobile terminal side, which has been fixed in the past, is changed according to the type of application used so far The PDP context connected by the application having different characteristics is made different in the time that must be connected according to its use, that is, the time when the next packet connection request is made. The cutting efficiency is improved. In other words, it is possible to suppress the number of portable terminals connected to the network while preventing the user from feeling overhead processing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of a PDP context control system in a portable terminal according to the present invention. As shown in the figure, the PDP context control system of the mobile terminal 100 is configured by software, and the mobile terminal 100 is provided with an application unit 101.

  The application unit 101 stores a plurality of applications (Applications) 101-1, 101-2,..., 101-N used in the mobile terminal 100, and the applications 101-1, 101-2,. For example, a browser, a mail service, a Java (registered trademark) application, and the like are host applications that provide communication services.

Each of these applications has a unique communication pattern, and the time from the end of the application to the start of the same application varies depending on the type of application, as will be described later.
Furthermore, the applications 101-1, 101-2,..., 101-N themselves start packet communication sequentially by passing communication data to an HTTP unit 102 described later.

Furthermore, the portable terminal 100 is provided with an HTTP (Hypertext Transfer Protocol) unit 102, and the HTTP unit 102 is used to transfer a file created in HTML from a Web server to a Web browser.
Further, the portable terminal 100 is provided with a TCP (Transmission Control Protocol) unit 103 and an IP (Internet Protocol) 104, and the TCP unit 103 and the IP unit 104 are protocol stacks, and an upper application 101 stored in the application unit 101. -1, 101-2,..., 101-N are provided with a communication connection when performing packet communication.

Further, the mobile terminal 100 is provided with a PDP (packet data protocol) manager (Manager) unit 104. The PDP manager unit 105 manages the connection / connection destination GGSN (Gateway GRRS Support Node) of the PDP context prior to the start of the packet communication service. / Controls PDP context disconnection processing.
Further, the PDP manager section 105 is provided with a PDP context disconnect timer section 105A. The PDP context disconnect timer section 105A measures the time of no packet communication after the application ends, and the disconnect timer value for which the measured time is set has elapsed. In this case, information for disconnecting the PDP context is provided to the PDP manager unit 105.

Further, the PDP manager unit 105 is provided with a disconnect timer storage unit 105B, and the disconnect timer value holding unit 105B stores a disconnect timer value set in the PDP context disconnect timer unit 105A.
Furthermore, the portable terminal 100 is provided with an application manager (AP Manager) 105, the application manager unit 106 has an application identification unit 106A, and the applications 101-1, 101-2,. 101-N manages the currently used application, notifies the PDP manager unit 105 of the terminated application ID when the application is terminated, and currently uses the PDP context disconnect timer unit 105A. The disconnect timer value for the application is set, and the PDP context disconnect processing is prompted.

  FIG. 2 is a diagram for explaining the application identification unit 106A in the application manager unit 106 of FIG. As shown in this figure, the application identifying unit 106A uses IDs 1, 2,... As IDs for identifying applications to the applications 101-1, 101-2,. Save N.

  FIG. 3 is a diagram showing an example of a communication pattern for explaining a non-communication state time until the same application starts communication after the application communication ends. As shown in this figure (a), for example, regarding the communication pattern of a mail application, after sending / receiving mail once, it is often used for creating the next mail, checking received mail, etc. The time until the operation is relatively long, about several minutes. That is, the packet non-communication state time between the packet communication state and the packet communication state is relatively long.

  As shown in FIG. 4B, for example, in the browser web browsing operation, the following link destinations are sequentially selected from the displayed content to browse the page for the browser application communication pattern. The time until communication is relatively short, from several seconds to several tens of seconds. That is, the time of the no packet communication state between the packet communication state and the packet communication state is relatively short.

FIG. 4 is a diagram for explaining the disconnect timer storage unit 105B in the PDP manager unit 105 of FIG. As shown in this figure, the disconnection timer storage unit 105B has a disconnection timer value for the ID for identifying the application for each of the applications 101-1, 101-2, ..., 101-N stored in the application unit 101. Saved.
The disconnect timer value is set with reference to the time of no packet communication described with reference to FIG.

As an example, for a mail application, a disconnection timer value of about “1 minute” is stored for an ID of “1”.
For mail applications, the packet non-communication state time is about several minutes, so the disconnect timer value is set to about 1 minute, which is shorter than the packet non-communication state time, and the disconnect timer value is set smaller. By disconnecting, it is possible to quickly release the PDP context and limit the number of connected portable terminals.

In this case, the disconnection timer value may be originally “0 minutes”, but is set to “1 minute” in preparation for a case where the mail application is terminated and restarted by mistake.
For the browser application, a disconnection timer value of about “several minutes” is stored for the ID of “2”.
For the browser application, the packet non-communication state time is several seconds to several tens of seconds. Therefore, set the disconnect timer value to “several minutes”, which is longer than the packet non-communication state time, and set the disconnect timer value larger. This makes it difficult to disconnect at the next browsing, reduces overhead, and shortens the user's experience connection time.

In this case, the disconnection timer value may originally be about “1 minute”, but it is set to about “several minutes” in consideration of variations in browsing time by the user.
More generally, the application 101-1, 101-2, ..., 101-N stored in the application unit 101 has a relatively long packet non-communication state based on the length of the packet non-communication state. In order to reduce the PDP context disconnection timer value, the PDP context disconnection timer value is individually set so as to increase the PDP context disconnection timer value for applications in which the packet non-communication time is relatively short. It is determined.

FIG. 5 is a sequence for explaining a series of operations of the PDP context control system in FIG. When communication data is transferred from the application unit 101 to the HTTP unit 102 when the application is activated, the application manager unit 106 is notified of the start of the application.
The application manager unit 106 extracts the ID from the application identification unit 106A for the notified application and notifies the PDP manager unit 105 of the ID of the application.

When the application unit 101 notifies the TCP unit 103 and IP unit 104 of the start of application communication, the TCP unit 103 and IP unit 104 notify the PDP manager unit 105 of socket open.
Prior to the packet communication service, an active-PDP-Request packet is transmitted from the PDP manager unit 105 to the GGSN, and an active-PDP-Response packet is transmitted from the GGSN to the PDP manager unit 105.

Between the application unit 101 of the mobile terminal 100 and the GGSN, the packet communication is being used.
When the application unit 101 notifies the TCP unit 103 and the IP unit 104 of the end of application communication, the TCP unit 103 and the IP unit 104 notify the PDP manager unit 105 of the socket close.

Further, the PDP manager unit 105 notifies the GGSN of socket close.
The PDP manager unit 105 extracts the disconnect timer value for the application ID from the disconnect timer value holding unit 105B, sets it in the PDP context disconnect timer unit 105A, and starts the PDP context disconnect timer unit 105A.

When the disconnection timer value set by the PDP context disconnection timer unit 105A elapses, a deactive-PDP-Request packet is transmitted from the PDP context disconnection timer unit 105A to the GGSN, and from the GGSN to the PDP manager unit 105, A deactive-PDP-Response packet is transmitted.
The PDP manager unit 105 disconnects the PDP context.

Note that the processing in the GGSN is the same as that in FIG.
FIG. 6 is a flowchart for explaining a series of operations of the PDP context disconnect timer 105A in the PDP manager unit 105 of FIG. As shown in the figure, in step 201, the application starts.
In step 202, the disconnect timer value for the started application is extracted from the disconnect timer holding unit 105B and set in the PDP context disconnect timer 105A.

In step 203, the PDP context is connected, in step 204, a packet communication service is provided, and in step 205, the application is terminated.
In step 206, the PDP context disconnect timer 105A starts.
In step 207, it is determined whether or not the disconnect timer value has elapsed. If it has elapsed, the process proceeds to step 209.

In step 208, if the disconnect timer value has not elapsed, it is determined whether or not the same application is started. If there is no start of the same application, the process returns to step 207, and if there is a start of the same application, the process proceeds to step 204 and the above steps are repeated.
In step 209, if the disconnect timer value has elapsed, the PDP context is disconnected.

  Therefore, according to the present invention, it is possible to change the disconnection timer value on the mobile terminal side, which has been fixed in the past, depending on the type of application that has been used so far. Since the time that must be connected depending on the use, that is, the time when the next packet connection request is made, is made different, the connection / disconnection efficiency of the PDP context is improved, in other words, the user feels overhead processing. It is possible to suppress the number of mobile terminals connected to the network while avoiding this.

FIG. 7 is a block diagram showing a schematic configuration of a PDP context control system in the mobile terminal, which is a modification of FIG. As shown in this figure, the application manager unit 106 is incorporated in the PDP manager unit 105. Application management of the application manager unit 106 is performed in the PDP manager unit 105, so that information notification between individual modules, for example, which application is started / finished, is parameterized and embedded in packet communication parameters. It becomes possible to do.
Thereby, in FIG. 1, an interface (IF) required for the application manager unit 106 can be omitted, and the configuration is simplified.

  The mobile terminal has been described above. The mobile terminal includes a mobile phone, a PHS (simple mobile phone), and a PDA (mobile information terminal), and the present invention can be used for these.

It is a block diagram which shows schematic structure of the PDP context control system in the portable terminal which concerns on this invention. It is a figure explaining the application identification part 106A in the application manager part 106 of FIG. It is a figure which shows the example of a communication pattern explaining the time of the non-communication state until the same application starts communication after completion | finish of communication of an application. It is a figure explaining the disconnection timer preservation | save part 105B in the PDP manager part 105 of FIG. It is a sequence explaining a series of operation | movement of the PDP context control system in FIG. 2 is a flowchart illustrating a series of operations of a PDP context disconnect timer 105A in the PDP manager unit 105 of FIG. As shown in the figure, in step 201, the application starts. It is a modification of FIG. 1, and is a block diagram showing a schematic configuration of a PDP context control system in a mobile terminal. It is a sequence explaining a series of operation | movement of PDP context control used as the premise of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Mobile terminal 101 ... Application part 101-1, 101-2, ..., 101-N ... Application 102 ... HTTP part 103 ... TCP part 104 ... IP part 105 ... PDP manager part 105A ... PDP context disconnection timer part 105B ... Disconnection Timer value holding unit 106 ... application manager unit 106A ... application identification unit

Claims (7)

In the PDP context control system of the mobile terminal that performs overhead processing when connecting the PDP context by the start of the application with the GGSN and disconnects the PDP context after a predetermined time from the end of the application ,
An application manager that identifies multiple applications stored on the mobile device and manages the applications currently in use;
With respect to the plurality of applications stored in the application unit, the application has a relatively long packet non-communication time depending on the type of application based on the length of the packet non-communication time from the end of each application to the restart of the same application. In contrast, a short PDP context disconnection time is stored, a long PDP context disconnection time is stored for a relatively short no-communication time application, and a disconnection of a connected PDP context is processed after the application is terminated. The application manager unit manages the PDP context disconnection time for the currently used application and disconnects the PDP context after the PDP context disconnection time has elapsed. Characterized in that it comprises a PDP manager unit to restart the cutting time of the PDP context after completion of the application that resumed when the same application before the elapse of the cut time after completion and PDP contexts is restarted PDP context control system. The PDP manager unit shortens a PDP context disconnection time for an application having a relatively long packet non-communication state, and disconnects a PDP context for an application having a relatively short packet non-communication state. The PDP context control system according to claim 1, wherein the PDP context disconnection time is changed to increase the time. The PDP manager unit shortens the disconnection time of the PDP context for a mail application having a relatively long packet non-communication state, and the PDP context for a browser application having a relatively short packet non-communication state. 2. The PDP context control system according to claim 1, wherein the disconnection time of the PDP is increased. The PDP context control system according to claim 1, wherein the PDP manager unit captures the application manager unit. In a PDP context control method of a mobile terminal that performs overhead processing when connecting a PDP context at the start of an application with a GGSN and disconnects the PDP context after a predetermined time from the end of the application ,
Identifying multiple applications stored on the mobile device and managing the applications currently in use;
A short PDP for the applications having a relatively long packet non-communication time according to the type of application based on the length of the packet non-communication time from the end of each application to the restart of the same application for the plurality of stored applications Storing a context disconnection time and storing a long PDP context disconnection time for a relatively short no-communication time application ;
When processing the disconnection of the connected PDP context, the PDP context disconnection time for the application currently managed and used by the application manager unit is started after the application ends, and the PDP context is disconnected after the PDP context disconnection time has elapsed. And when the same application is resumed after the application is terminated and before the PDP context disconnection time elapses, the PDP context disconnection time is restarted after the resumed application is terminated. A PDP context control method. In a program that executes overhead processing when connecting a PDP context at the start of an application with a GGSN, and executes PDP context control of the portable terminal that disconnects the PDP context after a predetermined time from the end of the application ,
Procedures to identify multiple applications stored on mobile devices and manage the applications currently in use,
A short PDP for the applications having a relatively long packet non-communication time according to the type of application based on the length of the packet non-communication time from the end of each application to the restart of the same application for the plurality of stored applications Storing a context disconnection time and storing a long PDP context disconnection time for a relatively short no-communication time application ;
When processing the disconnection of the connected PDP context, the PDP context disconnection time for the application currently managed and used by the application manager unit is started after the application ends, and the PDP context is disconnected after the PDP context disconnection time has elapsed. And, when the same application is resumed after the application is terminated and before the PDP context disconnection time elapses, a procedure for restarting the PDP context disconnection time after waiting for the termination of the resumed application is provided. A program for executing PDP context control on a computer. In the mobile terminal that performs overhead processing when connecting the PDP context with the GGSN at the start of the application and disconnects the PDP context after a certain time from the end of the application ,
An application section for storing multiple applications;
An application manager unit for identifying a plurality of applications stored in the application unit and managing currently used applications;
With respect to the plurality of applications stored in the application unit, the application has a relatively long packet non-communication time depending on the type of application based on the length of the packet non-communication time from the end of each application to the restart of the same application. A disconnection timer storage for storing a short PDP context disconnection time and storing a long PDP context disconnection time for a relatively short no-communication time application ;
When processing the disconnection of the connected PDP context, the PDP context disconnection time for the application currently managed and used by the application manager unit is started after the application ends, and the PDP context is disconnected after the PDP context disconnection time has elapsed. A PDP context disconnect timer to
A PDP manager unit that waits for the termination of the resumed application and restarts the PDP context disconnection time when the same application is resumed after the application is terminated and before the PDP context disconnection time elapses. Mobile terminal.

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