JP5396518B1 - Traffic control device and traffic control program - Google Patents

Abstract

To provide a traffic control device and a traffic control program capable of avoiding an influence on a user operation without changing an application and efficiently suppressing traffic transmitted / received in the background regardless of the user operation. .
A communication terminal includes: an application management unit that manages whether an installed application is in a foreground state or a background state; and a first wireless communication based on a communication request from the application. And a communication control unit 130 for controlling communication via the network or the second wireless communication network. When the communication terminal 100 is connected to the first wireless communication network, the communication control unit 130 suspends transmission of communication requests from the background application 220 and transmits a plurality of communication requests collectively, and transmits communication requests from the foreground application 210. Upon reception, the communication request is transmitted without being suspended.
[Selection] Figure 2

Description

  The present invention relates to a traffic control device and a traffic control program installed in a communication terminal connectable to a first wireless communication network and a second wireless communication network different from the first wireless communication network.

  In recent years, in mobile communication systems, so-called smartphones, in which applications can be easily added instead of conventional mobile communication terminals that provide telephones and e-mails as main applications, have become very popular. Smartphones are defined as mobile phones and PHSs (Personal Handyphone Systems) that are equipped with a general-purpose operating system (OS) whose specifications are publicly available, and that allow users to freely add applications to expand and customize functions ( (Source: Mobile Computing Promotion Consortium website)

  In such smartphones, the degree of freedom in application development is high, so the number of applications that communicate via wireless networks without user operations is increasing, and there is a situation where the battery that is installed runs out quickly. Yes. In order to solve such a power consumption problem, a method of mounting a background transfer engine that executes data transfer in the background in a smartphone is known (for example, Patent Document 1).

  The background transfer engine adjusts data related to processing executed in the background unrelated to the user's operation when communication related to the user's operation occurs, that is, data related to processing executed in the foreground occurs. To send. By such processing, the number of times of substantial connection to the network is reduced, and battery consumption can be suppressed.

JP 2011-259281 A ([Claim 1] and [0019] paragraphs, etc.)

  Regarding the background communication that is increasing in the above-described smartphones, it has recently been regarded as a problem to induce a network failure, and it is required to suppress the network load. According to the background transfer engine described in Patent Document 1, the number of connections to a substantial network is reduced, and battery consumption can be suppressed. However, there is a problem that requires application changes in order to perform control at the application layer. As a method to realize without changing the application, a method of controlling in the communication protocol layer, which is a lower layer than the application interface, can be considered, but an application indicating whether the application is executed in the foreground or background In order to make the layer information available at the communication protocol layer and to suppress the occurrence of connection with the mobile network, it is necessary to design in consideration of TCP retransmission control.

  The present invention has been made in view of such a situation, and without changing the application, while avoiding the influence on the user operation, efficiently transmits and receives traffic transmitted and received in the background regardless of the user operation. It is an object of the present invention to provide a traffic control device and a traffic control program that can be controlled in a controlled manner.

  A first feature of the present invention is a communication terminal (communication terminal) connectable to a first wireless communication network (wireless base station 30) and a second wireless communication network (access point 40) different from the first wireless communication network. 100) implemented in the foreground state executed in the foreground of the communication terminal or in the background of the communication terminal. An application management unit (application management unit 150) that manages which of the background state is to be transmitted, and via the first wireless communication network or the second wireless communication network based on a communication request from the application A communication control unit (communication control unit 130) for controlling communication The communication control unit suspends transmission of a communication request from an application managed as the background state by the application management unit when at least the communication terminal is connected to the first wireless communication network. The gist is to transmit a plurality of communication requests without suspending transmission of the communication request upon receipt of a communication request from an application managed as the foreground state by the application management unit.

  A second feature of the present invention is a traffic control program implemented in a communication terminal connectable to a first wireless communication network and a second wireless communication network different from the first wireless communication network, the communication terminal And an application management function for managing whether the application installed in the communication terminal is in the foreground state executed in the foreground of the communication terminal or the background state executed in the background of the communication terminal; And a communication control function for controlling communication via the first wireless communication network or the second wireless communication network based on a communication request from the application, and at least the communication terminal is configured to execute the first wireless communication network. If connected to the communication control function The communication request from the application managed as the background state by the application management function is suspended and transmitted in a batch, and the communication request from the application managed as the foreground state by the application management function The gist is to transmit the communication request without deferring upon receipt.

  According to the features of the present invention, a traffic control device and traffic that can avoid an influence on a user operation without changing an application and efficiently suppress traffic transmitted and received in the background regardless of the user operation. A control program can be provided.

1 is an overall schematic configuration diagram of a mobile communication system 10 according to an embodiment of the present invention. 2 is a functional block configuration diagram of a communication terminal 100 according to an embodiment of the present invention. FIG. FIG. 3 is a state transition diagram of the communication terminal 100 according to the embodiment of the present invention. It is a figure which shows the operation | movement flow of the communication terminal 100 when the communication state of the communication terminal 100 which concerns on embodiment of this invention changes. FIG. 7 is a diagram showing an operation flow of the communication terminal 100 when a communication request from an application 200 according to the embodiment of the present invention occurs. It is a figure which shows the operation | movement flow of the communication terminal 100 when the foreground application 210 which concerns on embodiment of this invention is changed. It is a figure which shows the operation | movement flow of the communication terminal 100 when the content of the white list which concerns on embodiment of this invention is changed. It is explanatory drawing of the implementation | achievement method (using the sleep / wakeup of a process) of the communication request holding / resuming according to the embodiment of the present invention. It is explanatory drawing of the implementation | achievement method (control in a TCP / IP and Socket layer) of the communication request holding | maintenance / resumption concerning embodiment of this invention.

  Next, an embodiment of the present invention will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones.

  Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Overall Schematic Configuration of Mobile Communication System FIG. 1 is an overall schematic configuration diagram of a mobile communication system 10 according to the present embodiment. As shown in FIG. 1, the mobile communication system 10 includes a server 20, a radio base station 30, an access point 40, a communication network 50, and a communication terminal 100. It should be noted that FIG. 1 illustrates only devices related to the present invention, and the mobile communication system 10 includes other devices.

  The server 20 communicates with the communication terminal 100 and provides a predetermined communication service (voice communication, electronic mail, video distribution, etc.). Specifically, the server 20 communicates with the communication terminal 100 via the communication network 50 with the radio base station 30 or the access point 40.

  The radio base station 30 is a radio base station according to radio access technology (RAT) defined in 3rd Generation Partnership Project (3GPP) or the like. Specifically, examples of the radio base station 30 include NodeB according to 3G (W-CDMA) and eNodeB according to Long Term Evolution (LTE). In the present embodiment, a first wireless communication network is configured by a plurality of wireless base stations 30, switching nodes (not shown), and the like.

  The access point 40 is a radio base station according to a radio communication technique different from the RAT described above. Specifically, examples of the access point 40 include a radio base station according to a wireless LAN defined by IEEE802.11b / g / n and a radio base station according to WiMAX defined by IEEE802.16e. . In the present embodiment, a second wireless communication network is configured by a plurality of access points 40, switching nodes (not shown), and the like.

  In general, the second wireless communication network has a higher speed and a wider bandwidth than the first wireless communication network, and the communication fee is lower than that of the first wireless communication network.

  The communication network 50 is connected to a first wireless communication network including the wireless base station 30 and a second wireless communication network including the access point 40. The server 20 is connected to the communication network 50. Note that the communication network 50 may include the Internet.

  The communication terminal 100 performs radio communication with the radio base station 30 or the access point 40. That is, the mobile communication system 10 can be connected to the first wireless communication network and a second wireless communication network different from the first wireless communication network. The communication terminal 100 is a mobile phone terminal that can be moved. Specifically, the communication terminal 100 is equipped with a general-purpose operating system (OS) whose specifications are publicized, and users can freely add applications to expand and customize functions. It is a smartphone that can.

(2) Functional Block Configuration of Communication Terminal FIG. 2 is a functional block configuration diagram of the communication terminal 100. As shown in FIG. 2, the communication terminal 100 includes a mobile phone platform 110, and a traffic control device 120 is mounted on the mobile phone platform 110.

  The mobile phone platform 110 is configured by an operating system (for example, Android), a kernel, a driver, and the like.

  The traffic control device 120 is a software module (program) that operates on the mobile phone platform 110 (operating system).

  The traffic control device 120 includes a communication control unit 130, a communication state management unit 140, an application management unit 150, and an application interface unit 160.

  The communication control unit 130 is installed in the communication terminal 100, and controls execution, suspension, and resumption of communication related to the application 200 according to the state (including the communication state) of the application 200 that is controlled by the traffic control device 120. To do. Specifically, the communication control unit 130 controls communication via the radio base station 30 (first radio communication network) or the access point 40 (second radio communication network) based on a communication request from the application 200. .

  More specifically, the communication control unit 130 starts from the application 200 (background application 220) managed as a background state by the application management unit 150 when at least the communication terminal 100 is connected to the radio base station 30. A plurality of communication requests are suspended and transmitted in a batch. In addition, when at least the communication terminal 100 is connected to the radio base station 30, the communication control unit 130 receives a communication request from the application 200 (foreground application 210) managed as a foreground state by the application management unit 150. The communication request is transmitted without being suspended.

  The communication control unit 130 executes control for each application 200 in a communication protocol layer positioned below the application 200, specifically, a TCP / IP layer (including a Socket layer). The communication control unit 130 suspends transmission of the communication request by sleeping the process of the communication request from the application 200 managed as a background state by the application management unit 150, and resumes the communication request by wakeup By doing so, a plurality of communication requests are transmitted together. When the communication by the communication request is resumed, the communication control unit 130 deletes the list of the applications 200 that have suspended transmission of the communication request. Details of the operation will be described later.

  Further, the communication control unit 130 is included in the communication protocol layer described above, is positioned above the TCP layer, and is managed as a background state by the application management unit 150 in a layer common to a plurality of applications 200, for example, the Socket layer. The transmission of the communication request from the application 200 (background application 220) that has been executed is suspended. Details of the operation will be described later.

  The communication control unit 130 is an application that is managed as a background state by the application management unit 150 when the communication terminal is connected to the access point 40 (higher speed / broadband than the radio base station 30 and lower communication charges). As soon as a communication request from 200 (background application 220) is received, the communication request can be transmitted without being suspended.

  In addition, the communication control unit 130, when the application 200 (background application 220) managed as the background state by the application management unit 150 is included in the white list managed by the application management unit 150, the white list As soon as a communication request from the application 200 included in is received, the communication request can be transmitted without being suspended. Further, when the application 200 managed as the background state by the application management unit 150 transitions to the foreground state, the communication control unit 130 resumes the communication request if the communication request from the corresponding application 200 is suspended. can do.

  The communication state management unit 140 receives an event notified from the mobile phone platform 110 and manages the communication state of the communication terminal 100. Specifically, the communication state management unit 140 becomes a communication means in which the second wireless communication network can be connected to the access point 40 and the second wireless communication network can be connected to the wireless base station 30 and the access point 40 in an invalid state. The mobile wireless is disabled, the access point 40 is not connectable and the wireless base station 30 is connectable, so the first wireless communication network is an effective communication means, but the application 200 is not communicating. The first wireless communication network is an effective communication means because it is not connectable to the access point 40 and can be connected to the wireless base station 30, but the application 200 is performing communication. Either is managed as the communication state of the communication terminal 100.

  The application management unit 150 manages whether the application 200 installed in the communication terminal 100 is in the foreground state executed in the foreground of the communication terminal 100 or the background state executed in the background of the communication terminal 100 To do.

  Specifically, the application management unit 150 acquires information indicating whether the application 200 is in the foreground state or the background state in the application layer, and uses the acquired information for communication control existing in the communication protocol layer. Notification to the unit 130.

  Note that when a plurality of applications 200 are executed, the mobile phone platform 110 includes an application that displays information on the screen of the communication terminal 100 and outputs a sound, that is, a foreground application 210 that is executed in the foreground. In order to determine the background application 220 executed in the background, it is necessary to always manage the foreground application 210. In the present embodiment, management of the foreground state or background state of the application 200 is realized by using the information of the foreground application 210 managed by the mobile phone platform 110.

  In addition, the application management unit 150 manages a white list including identification information of the application 200 that is not subject to transmission suspension of communication requests even in the background state. The white list is held by the application management unit 150, and the contents of the white list can be set by the user of the communication terminal 100 or the terminal manufacturer that manufactures the communication terminal 100.

  The application interface unit 160 provides an interface between the application management unit 150 and the setting application 230. Specifically, the application interface unit 160 receives a setting or whitelist setting request for enabling or disabling the traffic control device 120 from the setting application 230, and notifies the application management unit 150 of the received content.

(3) Operation of Communication Terminal Next, the operation of the communication terminal 100 described above will be described. Specifically, a state transition diagram of the communication terminal 100, an operation flow, and a method for realizing suspension / resumption of a communication request will be described.

(3.1) State Transition Diagram of Communication Terminal FIG. 3 is a state transition diagram of the communication terminal 100. As described above, the communication state of the communication terminal 100 includes a network invalid state, a mobile invalid state, a no-communication state, and a communicating state.

  As shown in FIG. 3, from the application 200 except when using a mobile network, that is, the first wireless communication network (3G, LTE, etc.) via the wireless base station 30 (mobile network enabled in the figure). Do not hold communication based on the communication request. In this way, the communication terminal 100 identifies the wireless communication network being used and switches the operation content to be executed (whether or not the communication request is to be held).

(3.2) Operation Flow FIGS. 4 to 7 show operation flows of the communication terminal 100. There are the following four external events in the traffic control device 120 implemented in the communication terminal 100.

-Communication status change-Communication request occurrence-Foreground application change-White list change The following describes the operation flow when each of the above events occurs.

(3.2.1) Communication State Change FIG. 4 shows an operation flow of the communication terminal 100 when the communication state of the communication terminal 100 changes. As shown in FIG. 4, when an event occurs in which the communication state (see FIG. 3) of the communication terminal 100 changes, the communication terminal 100 determines the communication state after the change (S10).

  In the mobile disabled state (that is, communication via the access point 40 is possible), the communication terminal 100 resumes communication associated with the communication request that has been suspended (process wakeup), and the application 200 that has suspended communication. Delete the list (S20, S30). Similarly, in the case of the communication state, the communication terminal 100 resumes communication associated with the communication request that has been suspended, and deletes the list of applications 200 that have been suspended (S40, S50).

(3.2.2) Generation of Communication Request FIG. 5 shows an operation flow of the communication terminal 100 when a communication request from the application 200 is generated. As shown in FIG. 5, when a communication request occurs, the communication terminal 100 determines whether the application 200 is a communication request by the foreground application 210 (S110).

  In the case of a communication request by the background application 220, the communication terminal 100 determines whether or not the communication state is a no-communication state (S120). In the non-communication state, the communication terminal 100 determines whether or not the background application 220 that has transmitted the communication request is registered in the white list (S130).

  If not registered in the white list, the communication terminal 100 adds the background application 220 to the list of applications 200 for which communication is suspended, and suspends communication (process standby) according to the communication request (S140, S150). On the other hand, in the case of a communication request by the foreground application 210, the communication terminal 100 is a communication request by the background application 220 but is registered in the white list and a communication request by the background application 220 but is not in a no-communication state. Then, the communication according to the communication request is permitted (that is, the traffic control device 120 does nothing) (S160, S170, S180).

(3.2.3) Change of Foreground Application FIG. 6 shows an operation flow of the communication terminal 100 when the foreground application 210 is changed. As shown in FIG. 6, when the foreground application 210 is changed, the communication terminal 100 determines whether or not the communication state is a network invalid state (S210).

  If the network is not in an invalid state, the communication terminal 100 searches the list of applications 200 that are pending communication, and determines whether or not the communication request of the changed foreground application 210 is pending (S220, S230).

  If the communication request of the foreground application 210 is held, communication associated with the held communication request is resumed (process wakeup), and the list of applications 200 that have held communication is deleted (S240, S250).

(3.2.4) White List Change FIG. 7 shows an operation flow of the communication terminal 100 when the content of the white list is changed. As shown in FIG. 7, when the content of the white list is changed, the communication terminal 100 updates the content of the white list (S310). Further, the communication terminal 100 determines whether or not the communication state is a network invalid state (S320).

  If the network is not in an invalid state, the communication terminal 100 searches the list of applications 200 that are pending communication, and determines whether or not the communication request of the application 200 that is the target of the white list is pending (S330, S340). ).

  When the communication request of the application 200 that is the target of the white list is held, communication associated with the held communication request is resumed (process wakeup), and the list of the application 200 that has held communication is deleted (S350) , S360).

(3.3) Method for Realizing Communication Request Hold / Resume FIGS. 8A and 8B are explanatory diagrams of a method for realizing communication request hold / restart (using a process sleep / wakeup). As shown in FIG. 8A, when a communication request from the application 200 is simply stopped (blocked), an error response is transmitted to the application 200 side. For this reason, if communication is interrupted by iptables or the like, a communication error occurs, and communication according to the communication request cannot be resumed.

  On the other hand, in the present embodiment, as shown in FIG. 8B, for the process related to the communication request, the transmission of the communication request is stopped by Sleep, and specifically, the process is processed as an error. Instead, hold (pause). The process suspended by Sleep is resumed by Wakeup, and a plurality of communication requests are transmitted together. The timing for resuming the process may be arbitrary. For example, the suspended process may be resumed when the foreground application 210 executes communication, or may be resumed when entering the communication area (cell) formed by the access point 40.

  FIGS. 9A and 9B are explanatory views of a method for realizing suspension / resumption of a communication request (control in TCP / IP and Socket layers). As shown in FIG. 9A, not only transmission from the communication terminal 100 (application 200) but also connection with the network (wireless base station 30 or access point 40) by a communication request from the communication partner to the communication terminal 100 Is required.

  As shown in FIG. 9A, when a communication request is suspended (stopped) in the TCP layer and below, retransmission control by TCP is activated, so that the network load associated with the communication request cannot be suppressed. Therefore, as shown in FIG. 9B, communication is suspended in a state where retransmission control by TCP does not operate by holding a communication request in a layer common to a plurality of applications 200 positioned above the TCP layer, for example, the Socket layer. The request can be held.

  In the present embodiment, as described above, control for each application 200 is executed in the communication protocol layer including the TCP / IP layer. If such control is to be executed in the application layer, it is necessary to make corrections in units of the application 200, which is not realistic.

(4) Operation / Effect According to the communication terminal 100, at least when the communication terminal 100 is connected to the radio base station 30 (first radio communication network), the application 200 (background application) managed as the background state 220) is suspended, and a plurality of such communication requests are transmitted together at the timing of restarting communication. On the other hand, upon receiving a communication request from the application 200 (foreground application 210) managed as the foreground state, the transmission of the communication request is transmitted without being suspended.

  For this reason, since a plurality of communication requests related to the background application 220 can be transmitted together, substantial traffic transmitted in the background can be suppressed. Specifically, the control signal generated at the start and end of connection with the network (radio base station 30 or access point 40) associated with the communication request can be reduced as compared with the case where the communication request is transmitted individually. As a result, substantial traffic transmitted in the background can be suppressed. Further, since a communication request from the application 200 (foreground application 210) managed as the foreground state is promptly transmitted, there is no influence on the user operation.

  That is, according to the communication terminal 100, it is possible to efficiently suppress traffic transmitted / received in the background regardless of the user operation while avoiding an influence on the user operation.

  Further, in the present embodiment, the communication terminal 100 executes control for each application 200 in the communication protocol layer positioned lower than the application 200, and the communication request process from the background application 220 is performed by the sleep. By suspending the transmission of the request and resuming the communication request by wakeup, a plurality of communication requests are transmitted together, and the communication request is transmitted from the background application 220 in a layer higher than TCP, for example, the Socket layer. Hold on. For this reason, it is possible to reliably hold a communication request while avoiding communication errors and occurrence of communication associated with retransmission control by TCP.

  In the present embodiment, when the communication terminal 100 is connected to the access point 40 (second wireless communication network), the communication request is transmitted without being suspended as soon as the communication request from the background application 220 is received. When the second wireless communication network is used, the load of the mobile network such as 3G is not affected, and therefore communication is executed without holding the communication request from the background application 220.

  In addition, when the communication state of the communication terminal 100 is in the communication state (that is, the mobile network is enabled), the communication request of the background application 220 is not restarted, and the communication request is restarted only in the mobile disabled state as follows. Can be expected. That is, when connected to a mobile network such as 3G, the communication request of the foreground application 210 operated by the user is not suspended, but the communication request of the background application 220 is suspended, and in an environment other than the mobile network such as a wireless LAN. By resuming the communication request only with this, it is possible to prevent the generation of charges due to unintended communication. In addition, by resuming communication requests from the background application 220 only in an environment other than a mobile network such as a wireless LAN, the traffic on the mobile network is released to other networks (traffic offloading) to reduce the load on the mobile network. it can.

  In this embodiment, when the background application 220 is included in the white list, the communication request is transmitted without being suspended upon receipt of the communication request from the corresponding background application 220. When the background application 220 transitions to the foreground application 210 due to a user operation or the like, the communication request that has been suspended is immediately resumed. With such an operation, the foreground application 210 executed in the foreground is not always suspended, and the user's operation is not hindered.

(5) Other Embodiments As described above, the content of the present invention has been disclosed through one embodiment of the present invention. However, it is understood that the description and drawings constituting a part of this disclosure limit the present invention. should not do. From this disclosure, various alternative embodiments will be apparent to those skilled in the art.

  For example, in the embodiment of the present invention described above, when the communication terminal 100 is connected to the radio base station 30 (first radio communication network), a plurality of communication requests from the background application 220 are suspended and collected. As soon as the communication request from the foreground application 210 is received, the communication request 100 is transmitted without being suspended. However, the communication terminal 100 is not the wireless base station 30 but the access point 40 (second wireless communication network). The above-described operation may be executed even when connected to ().

  In the above-described embodiment, the Socket layer has been described as an example of a layer common to a plurality of applications 200 positioned above the TCP layer. However, other than the Socket layer, for example, the communication is common in the mobile phone platform 110. When a layer to be used is provided, a method of controlling by that layer is also conceivable.

  In the above-described embodiment, 3G (W-CDMA) and LTE have been described as examples of the first wireless communication network (mobile network). However, the first wireless communication network may be cdma2000 or GSM (GSM) defined in 3GPP2. Registered trademark).

  In the above-described embodiment, the traffic control device 120 has been described as a software module (program) operating on the mobile phone platform 110 (operating system), but the traffic control device 120 is stored in a storage medium (memory or the like). It may be provided as a state or a chip in which the program is incorporated.

  In the embodiment described above, communication stop / restart by the background application 220 is realized by stopping / restarting the process at the timing when the background application 220 executes communication, but it is executed without user operation. Since the processing is executed in response to the timer interrupt, it may be realized by controlling the non-execution / execution of the timer interrupt handler at the timing when the timer interrupt occurs.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

10 ... Mobile communication system
20 ... Server
30 ... Radio base station
40 ... Access point
50 ... Communication network
100 ... Communication terminal
110… Mobile phone platform
120 ... Traffic control device
130 ... Communication control unit
140… Communication state management department
150… Application Management Department
160: Application interface
200 ... Application
210… Foreground application
220 ... Background application
230… Setting application

Claims (6)

A traffic control device mounted on a communication terminal connectable to a first wireless communication network and a second wireless communication network different from the first wireless communication network,
An application management unit that manages whether the application installed in the communication terminal is in the foreground state executed in the foreground of the communication terminal or the background state executed in the background of the communication terminal;
A communication control unit that controls communication via the first wireless communication network or the second wireless communication network based on a communication request from the application;
The communication control unit, when at least the communication terminal is connected to the first wireless communication network,
Suspending transmission of communication requests from applications managed as the background state by the application management unit and sending a plurality of batches,
A traffic control device that transmits a communication request from an application managed as the foreground state by the application management unit without receiving the transmission of the communication request. The communication control unit
In the communication protocol layer positioned lower than the application, execute the control for each application,
The process of the communication request from the application managed as the background state, the transmission of the communication request is suspended by Sleep, and the communication request is resumed by Wakeup, and the communication request is transmitted collectively.
The transmission of a communication request from an application that is included in the communication protocol layer, is positioned above the TCP layer, and is managed as the background state in a layer that is common to the plurality of applications. Traffic control device.   When the communication terminal is connected to the second wireless communication network, the communication control unit receives the communication request from the application managed as the background state by the application management unit. The traffic control device according to claim 1, wherein the traffic control device transmits without suspending. The application management unit maintains a white list including identification information of applications that are not subject to transmission suspension of the communication request,
When the application managed as the background state by the application management unit is included in the white list, the communication control unit does not hold the communication request upon receipt of the communication request from the application. The traffic control device according to claim 1 for transmission.   The communication control unit resumes the communication request if a communication request from the application is suspended when an application managed as the background state by the application management unit transitions to the foreground state. 2. The traffic control device according to 1. A traffic control program implemented in a communication terminal connectable to a first wireless communication network and a second wireless communication network different from the first wireless communication network,
In the communication terminal,
An application management function for managing whether an application installed in the communication terminal is in a foreground state executed in the foreground of the communication terminal or a background state executed in the background of the communication terminal;
A communication control function for controlling communication via the first wireless communication network or the second wireless communication network based on a communication request from the application, and at least the communication terminal makes the first wireless communication network When connected, the communication control function is
A plurality of communication requests are suspended and transmitted from the application managed as the background state by the application management function.
A traffic control program that, upon receiving a communication request from an application managed as the foreground state by the application management function, transmits the communication request without deferring transmission.

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