KR20140039543A - Method for controlling traffic by using optimum network, apparatus and terminal therefor - Google Patents

Abstract

A method for controlling traffic by using an optimum network and a policy providing apparatus and terminal therefor are disclosed. Provided is a terminal including: a signal generating unit for generating a traffic request signal; a policy management unit for transmitting a policy request signal including transmitter identification information to a policy providing device, and receiving a policy response signal in response to the policy request signal; a terminal network recognition unit for recognizing a network status of a cellular network based on the policy response signal; a traffic transceiving unit for downloading, from a content providing device, a traffic response signal corresponding to the traffic request signal; and a traffic control unit for controlling execution of the download through a recognized WLAN network, and execution of the download through the cellular network based on the network status when the terminal is beyond the coverage of the WLAN network. [Reference numerals] (AA) Start; (BB,DD) No; (CC,EE) Yes; (FF) End; (S510) Allow a terminal to transmit cell ID information to a policy providing device periodically; (S520) Allow the policy providing device to check the current position of the terminal; (S530) Determine whether the current position is within the range of a position where a preset communications service company AP is installed; (S540) Allow an inter-mobile network mobility securing device to transmit a WLAN network connection request signal to the terminal; (S550) Allow the terminal to turn off a cellular network, turn on a WLAN network and download; (S560) Determine whether the terminal is beyond the coverage of the WLAN network; (S570) Allow the terminal to download through the cellular network based on a network status

Description

Method for controlling traffic using policy and apparatus and terminal for providing policy therefor {Method for Controlling Traffic by Using Optimum Network, Apparatus And Terminal Therefor}

The present embodiment relates to a traffic control method using an optimal network, a policy providing device and a terminal therefor. More specifically, when downloading traffic according to when the resource utilization rate of the network is high or low, the download status is controlled regardless of whether the cellular network is congested by using the location information of the wireless LAN network established by the service provider. The present invention relates to a traffic control method using an optimal network capable of adaptively transmitting traffic without affecting traffic, and a policy providing device and a terminal therefor.

It should be noted that the following description merely provides background information related to the present embodiment and does not constitute the prior art.

In the current traffic control scheme of mobile communication systems, in order to transmit traffic requested at a user level in real time, a Best Effort type in the network layer, which is the L3 layer of the terminal and the server, The data transmission method of FIG. However, such a conventional technique has a problem in that it can not detect whether or not the server or the terminal of the core network is congested by the load base station or the base station.

That is, the load or congestion occurring at the base station decreases the data transmission efficiency of the terminal, and the terminal that fails to transmit due to packet loss or the like continuously retries at the network layer at the L3 layer, There is a problem to sustain. In addition, when there is no user-level traffic transmission request, there is a problem that the network availability on the side of a communication provider is lowered by creating an idle state in which resources of the network are not used.

In the present embodiment, when downloading traffic according to when the resource utilization rate of the network is high or low, the download state is controlled regardless of whether the cellular network is congested by using the location information of the WLAN network established by the communication operator. Its main purpose is to provide a traffic control method using an optimal network capable of adaptively transmitting traffic without affecting the traffic and a policy providing device and a terminal therefor.

According to an aspect of the present embodiment, a signal generator for generating a traffic request signal; A policy manager which transmits a policy request signal including transmitter identification information to a policy providing device and receives a policy response signal in response to the policy request signal; A terminal network recognizer configured to recognize a network state of a cellular network based on the policy response signal; A traffic transceiving unit which downloads a traffic response signal corresponding to the traffic request signal from a content providing device; And a traffic controller configured to perform the download through a recognized WLAN network, and to perform the download through the cellular network based on the network state when the download is out of coverage of the WLAN network. Provide a terminal.

In addition, according to another aspect of the present embodiment, the communication unit for receiving a policy request signal including the transmitter identification information from the terminal; A determination unit determining whether a WLAN network is around the terminal based on the transmitter identification information; A request unit controlling to transmit a WLAN network access request signal to the terminal through a device for securing mobility between heterogeneous networks when the WLAN network is around the terminal; A network recognition unit for recognizing a network state of a cellular network; A policy decision unit generating a policy response signal including a policy determined based on the network state; And a policy transmitter for transmitting the policy response signal to the terminal.

In addition, according to another aspect of the present invention, a method for controlling traffic by a terminal, comprising: a signal generation step of generating a traffic request signal; A policy management process of transmitting a policy request signal including transmitter identification information to a policy providing device and receiving a policy response signal in response to the policy request signal; A terminal network recognition process of recognizing a network state of a cellular network based on the policy response signal; A traffic transmission / reception process of downloading a traffic response signal corresponding to the traffic request signal from a content providing device; And performing a download through a recognized WLAN network, and controlling to perform the download through the cellular network based on the network state when the download is out of coverage of the WLAN network. A traffic control method using an optimal network is provided.

According to another aspect of the present embodiment, there is provided a method of controlling traffic by a policy providing device, comprising: a communication process of receiving a policy request signal including transmitter identification information from a terminal; A determination process of determining whether there is a WLAN network around the terminal based on the transmitter identification information; A request process of controlling to transmit a WLAN network access request signal to the terminal through a device for securing mobility between heterogeneous networks when the WLAN network is around the terminal; A network recognition process of recognizing a network state of a cellular network; A policy determination process of generating a policy response signal including a policy determined based on the network state; And a policy transmitting process of transmitting the policy response signal to the terminal.

As described above, according to the present embodiment, when the traffic download is performed according to when the resource utilization rate of the network is high or low, the cellular network is congested using the location information of the WLAN network established by the telecommunications carrier. By controlling the download status without traffic, the traffic can be adaptively transmitted without affecting the traffic of the network.

In addition, according to the present embodiment, it is possible to facilitate the load management of the path network through the policy providing device, and to prevent some subscribers from using the network excessively and to provide equal service quality to other subscribers (real-time traffic users). There is an effect that can be provided. In addition, according to the present embodiment, it is possible to control the temporary congestion of the network caused by the non-real-time traffic by utilizing the idle capacity while minimizing investment in the network, and to increase the utilization rate of the network.

In addition, according to the present embodiment, by using the transmitter load information secured for the load management of the transmitter, unnecessary measurement overhead and time are reduced, and adaptive traffic is controlled in the non-real time while minimizing the influence of the network during operation of the related service. It can work. In addition, according to the present embodiment, as a technology for supporting the downloading and uploading of large-capacity contents in a non-timely manner, it is possible to utilize the idleness state of the network without affecting the network operator's network, There is an effect that can be increased. In addition, according to the present embodiment, a new service (for example, fixed rate charging) is applied to a traffic using an adaptive traffic transmission scheme without additional charging in a new service (for example, a measured rate system) An additional service product) can be applied.

In addition, according to the present embodiment, there is a problem that the utilization rate of the network resource is low due to the low usage of the network during the time when the user does not use the terminal or the relatively idle state of the network through non-real time data transmission control that recognizes the network state. In the busy time situation, it is possible to minimize the load on the network by controlling the data transmission to sustain the congestion situation.

1 is a block diagram schematically illustrating a traffic control system using an optimal network according to an embodiment of the present invention;
2 is a block diagram schematically showing a network according to the present embodiment,
3 is a block diagram schematically showing a traffic control apparatus according to the present embodiment,
4 is a block diagram schematically illustrating an apparatus for providing a policy according to the present embodiment;
5 is a flowchart illustrating a traffic control method using an optimal network according to the present embodiment;
6 is an exemplary view for explaining a traffic control method according to the present embodiment;
7 is a flowchart illustrating an adaptive non-real-time traffic control method according to the present embodiment;
8 is a flowchart illustrating a policy management method according to the present embodiment;
9 is an exemplary diagram for describing non-real-time traffic according to the present embodiment.

Hereinafter, the present embodiment will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a traffic control system using an optimal network according to the present embodiment.

The traffic control system according to the present embodiment includes a terminal 110, a traffic control application 112, a network 120, a policy providing device 130, a content providing device 140, and a device for securing mobility between heterogeneous networks 150. do. In the present embodiment, the traffic control system includes only the terminal 110, the traffic control application 112, the network 120, the policy providing device 130, the content providing device 140, and the heterogeneous network mobility securing device 150. However, this is merely illustrative of the technical idea of the present embodiment, and those of ordinary skill in the art to which this embodiment belongs, adaptive non-real-time traffic control within the scope not departing from the essential characteristics of this embodiment Various modifications and variations to the components included in the system will be applicable. Here, traffic refers to the amount of data that flows within a certain period of time on the transmission path of the network 120.

The terminal 110 is a terminal capable of transmitting and receiving various data via the network 120 according to a key operation or a command of the user. The terminal 110 may be a tablet PC, a laptop, a personal computer Computer, a smart phone, a personal digital assistant (PDA), and a mobile communication terminal. In addition, the terminal 110 may be a cloud computing terminal that supports cloud computing that can use services such as data reading, writing, storing, network, and content usage through the network 120.

That is, the terminal 110 is a terminal that performs voice or data communication using the network 120 and includes a memory for storing a program or a protocol for communicating with the content providing apparatus 140 via the network 120, And a microprocessor for executing and controlling the program. That is, the terminal 110 may be any terminal as long as it can perform server-client communication with the content providing apparatus 140, and it is a broad concept including all communication computing devices such as a notebook computer, a mobile communication terminal, and a PDA. The terminal 110 includes a plurality of communication modules and performs voice or data communication through the path networks 122, 124, 126, and 128, which are used as paths of non-real-time traffic in the network 120 And may communicate with the content providing device 140 via the route network 122, 124, 126 and 128. [ The terminal 110 manages data to store contents in the terminal 110 or to send traffic of the terminal 110 to the contents providing apparatus 140 for traffic processing. Although the terminal 110 is described as being implemented as a separate apparatus from the policy providing apparatus 130 in the present embodiment, the terminal 110 includes all of the policy providing apparatus 130 (Stand Alone) device.

The terminal 110 according to the present embodiment can implement the adaptive non-real time traffic control by loading the traffic control application 112. [ That is, the terminal 110 may drive the traffic control application 112 by a user's operation or command, and may control the adaptive non-real time traffic control through the traffic control application 112. More specifically, the traffic control application 112 refers to an application installed after being downloaded through an application store, if the terminal 110 is a smart phone, (Feature Phone) refers to an application running on a VM (Virtual Machine) downloaded through a communication company server.

The traffic control application 112 may be installed in the terminal 110 according to the embodiment of the present invention. The terminal 110 may be implemented in a state in which the traffic control application 112 is mounted in an embedded form , An OS (Operating System) mounted in the terminal 110, or installed in an OS in the terminal 110 by a user's operation or command. The traffic control application 112 loaded on the terminal 110 in the manner described above is linked to the basic application (e.g., a text sending application, a voice call sending / receiving application, a data sending / receiving application, a messenger application, etc.) However, the present invention is not limited thereto, and can be implemented to operate as an independent function without interlocking with the basic application.

Hereinafter, an operation of adaptive non-real-time traffic control by the terminal 110 will be described. The terminal 110 generates a non-real-time traffic request signal based on an input user operation or command. Here, the non-real-time traffic request signal is a kind of traffic request signal. When the user inputs a command for requesting specific contents by operating the terminal 110, the terminal 110 transmits the contents to the contents providing apparatus 140 The terminal 110 controls the traffic according to the network state of the path network 122, 124, 126, and 128, so that when the network state is congested, the non-real- Traffic request signal. Meanwhile, the same concept can be applied to the non-real-time traffic response signal corresponding to the non-real-time traffic request signal. The terminal 110 transmits a policy request signal to the policy providing device 130, receives a policy response signal in response to the policy request signal, and selects one of the path networks 122, 124, 126, and 128 based on the policy response signal. Recognize the network status of one). The terminal 110 downloads the non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing device 140 via the path network 122, 124, 126, or 128, or in the terminal 110. While pre-stored content is uploaded to the content providing device 140, the download or upload (traffic) is controlled based on the network state when downloading or uploading.

Hereinafter, the terminal 110 according to the present embodiment will be described for the operation of controlling the traffic using the optimal network. The terminal 110 generates a non-real-time traffic request signal by a user's manipulation or command, and transmits a policy request signal including the transmitter identification information to the policy providing device 130. Here, the transmitter identification information is information for identifying the transmitters 210 and 220 existing on the cellular network 122, 124, and 128, and may be cell ID information. The terminal 110 receives a policy response signal from the policy providing device 130 in response to the policy request signal, and recognizes the network state of the cellular network 122, 124, or 128 based on the received policy response signal. In addition, the traffic response signal corresponding to the traffic request signal is downloaded from the content providing device 140 and downloaded through the recognized WLAN network 126. The terminal 110 then downloads via the cellular network 122, 124, or 128 based on the network state of the cellular network 122, 124, or 128 when it is out of coverage of the WLAN network 126. Control to perform. In this case, the terminal 110 determines that the coverage of the WLAN network 126 is out of coverage when the received signal strength for the WLAN network 126 is less than a preset threshold. In addition, the terminal 110 preferentially searches for the WLAN network 126 at the time of initial download, and then, if the WLAN network 126 is not found, any one of the cellular networks 122, 124, and 128 based on the network state information. To download).

In addition, when the terminal 110 receives the WLAN network access request signal from the heterogeneous network mobility obtaining device 150 while performing the download through the cellular network 122, 124, or 128, the cellular network 122, 124. And turn off to any one of 128), and then turn on to the WLAN network 126, and download is performed regardless of the network state through the WLAN network 126. Here, the WLAN network access request signal includes a search command for the WLAN network 126, a turn off command for the cellular network 122, 124, and 128, and a turn for the WLAN network 126. At least one or more of the on commands.

Hereinafter, a process of recognizing a network state of a path network 122, 124, 126, and 128 through which the terminal 110 communicates will be described. The terminal 110 recognizes the network state as one of a congestion state, a normal state, and a smooth state based on the propagation environment signals received from the path networks 122, 124, 126, and 128. [ At this time, the terminal 110 recognizes the network state by comparing at least one parameter among Rx, Tx, Ec / Io, RSSI, transmission rate, and the number of allocated terminals, which are parameters included in the radio wave environment signal, with a preset network state threshold. . In addition, the terminal 110 compares the parameter with the network state threshold and recognizes the network state as a congestion state when the parameter exceeds (or falls below) the network state threshold. In addition, the terminal 110 compares the parameter with the network state threshold and recognizes the network state as a smooth state when the parameter is less than the network state threshold. In addition, the terminal 110 compares the parameter with the network state threshold and recognizes the network state as a general state when the parameter is included in the error tolerance of the network state threshold.

Meanwhile, the terminal 110 can determine the order of the generated traffic request signal when transmitting the generated traffic request signal to the content providing apparatus 140. Specifically, it is as follows. The terminal 110 determines the transmission order of the non-real-time traffic request signal transmitted to the content providing apparatus 140 according to the input operation of the user or the order of the command or the priority information based on the type of the content. Also, the terminal 110 transmits a non-real-time traffic request signal to the contents providing apparatus 140 based on the determined transmission order.

Here, the policy response signal received by the terminal 110 from the policy providing apparatus 130 is a signal including at least one of policy request period information, a threshold value, and priority information according to the network status. At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. In addition, the threshold value may include at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126, and 128, the traffic transmission status of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has priority values based on the values set to transmit the traffic preferentially at the shortest time (the time at which the call is generated the least during the day) or the type of the route network (any of 122, 124, 126 and 128) . That is, the traffic parameters may include Rx, Tx, Ec / Io, rate, number of assigned terminals, and the like.

Hereinafter, a process in which the terminal 110 recognizes the network state and adaptively controls the non-real time traffic will be described in detail. The terminal 110 compares the transmission rate with the threshold value included in the policy response signal at the time of downloading or uploading, and when the transmission rate is less than the threshold value, the terminal 110 recognizes that the network status is congested and stops download upload (traffic). That is, when the key quality indicators of Rx and Tx among the parameters related to the traffic control included in the policy response signal are less than the threshold value, the terminal 110 recognizes that the network status is congested and stops downloading or uploading (traffic) . The terminal 110 may also determine that the distance between the location of the terminal assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128 and the transmitter 210, 220 exceeds a predetermined distance It stops downloading or uploading (traffic) for resource efficiency of the path networks 122, 124, 126 and 128. [ In addition, the terminal 110 stops downloading or uploading (traffic) when the terminal battery status is below the threshold value or when the terminal temperature exceeds the threshold value.

Hereinafter, a process of retrying non-real time traffic of the terminal 110 will be described. The terminal 110 operates to repeat the download or upload (traffic) retry according to the policy response signal. That is, the terminal 110 performs a download or upload (traffic) retry when a preset timer time elapses. In addition, the terminal 110 performs a download or upload (traffic) retry if the path network 122, 124, 126 and 128 is changed to another network. In addition, the terminal 110 performs a download or upload (traffic) retry when a new non-real-time traffic request signal is received.

Hereinafter, a driving method of the traffic control application 112 will be described. The traffic control application 112 may be implemented to operate independently in a form having a separate software function or hardware function performed by the terminal 110 or a separate software function or hardware function performed by the terminal 110 Or the like.

The traffic control application 112 is preferably installed in the terminal 110 and operates using various hardware provided in the terminal 110. However, the traffic control application 112 is not limited thereto and may be implemented as a separate device. In addition, the traffic control application 112 may operate in conjunction with pre-installed applications in the terminal 110.

The traffic control application 112 may also be installed within the terminal 110 to determine whether the traffic control application 112 is to perform the traffic control application 112. For example, And the like), and manages the adaptive data traffic based on the recognized network state.

To describe the operation of the traffic control application 112 in more detail, the traffic control application 112 generates a non-real-time traffic request signal by an input or operation of a user. The traffic control application 112 sends the policy request signal to the policy providing device 130, receives the policy response signal corresponding to the policy request signal, and based on the policy response signal, the route network 122, 124, 126, and 128. Recognize the network state of any one of The traffic control application 112 downloads a non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing device 140 via the path network 122, 124, 126, or 128, or the terminal 110. The pre-stored content is uploaded to the content providing apparatus 140, but the function of controlling the download or upload (traffic) based on the network state when downloading or uploading.

In addition, the traffic control application 112 describes the process of adaptive non-real-time traffic control using the optimal network, the traffic control application 112 generates a non-real-time traffic request signal, the policy request signal including the transmitter identification information Is transmitted to the policy providing device 130, receives a policy response signal from the policy providing device 130 in response to the policy request signal, and based on the policy response signal of the cellular network 122, 124, and 128 The network state is recognized and the traffic response signal corresponding to the traffic request signal is downloaded from the content providing device 140. At this time, the traffic control application 112 performs a download through the recognized WLAN network 126, but the network state of the cellular network 122, 124 and 128 when out of coverage of the WLAN network 126 Control to perform a download over the cellular network 122, 124, or 128 based on. In this case, the traffic control application 112 determines that the coverage of the WLAN network 126 is out of coverage when the received signal strength for the WLAN network 126 is less than a preset threshold. Further, the traffic control application 112 preferentially searches for the WLAN network 126 upon initial download, and then, if the WLAN network 126 is not detected, the traffic control application 112 may be configured based on the network state information. The download is performed through either. In addition, when the traffic control application 112 receives the WLAN network access request signal from the heterogeneous network mobility securing device 150 while performing the download through the cellular network 122, 124, or 128, the cellular network 122. , 124, and 128), and then turn on to the WLAN network 126, and download is performed regardless of the network state through the WLAN network 126. Here, the WLAN network access request signal includes a search command for the WLAN network 126, a turn off command for the cellular network 122, 124, and 128, and a turn on command for the WLAN network 126. It includes at least one command.

The network 120 may include an Nth network (Synchronous Network, Internet network, intranet network, satellite communication network, etc.) 128 (including a 3G network 122, a 4G network 124, ), Which can transmit and receive data through a communication protocol using various wired / wireless communication technologies. The network 120 may include a cloud computing network that can be coupled to the content providing apparatus 140 to store computing resources such as hardware and software and to provide the computing resources required by the client to the terminal 110 can do. Here, cloud computing refers to a computer environment in which information is permanently stored on a server on the Internet and temporarily stored in a client terminal such as a desktop, a tablet computer, a notebook, a netbook, or a smart phone. Cloud computing, Refers to a computer environment access network that stores information on a server on the Internet and makes the information available anytime and anywhere through various IT devices. The network 120 will be described in detail with reference to FIG.

The policy providing device 130 recognizes the network status of each terminal assigned to the path networks 122, 124, 126, and 128, and determines and manages policies related to data traffic based on the detected network status Function. That is, when the policy providing apparatus 130 receives the policy request signal from the terminal 110, the policy providing apparatus 130 interlocks with the terminal 110 via the network 120. When the policy providing apparatus 130 receives the policy request signal from the terminal 110, Generates a policy response signal corresponding to the request signal, and transmits the policy response signal to the terminal 110. The policy providing apparatus 130 may use a 3G PCRF (Policy Charging and Rules Function) 218 or a 4G PCRF 230.

The policy providing device 130 receives a policy request signal from the terminal 110 and recognizes a network state of a path network 122, 124, 126, and 128 with which the terminal 110 communicates, and recognizes the network state. The system generates a policy response signal including the policy determined based on the result, and transmits the policy response signal to the terminal 110. At this time, the policy providing apparatus 130 transmits a policy response signal to the terminal 110.

Hereinafter, the process of the policy providing apparatus 130 recognizing the path networks 122, 124, 126, and 128 will be described. The policy providing apparatus 130 recognizes the network state as one of a congestion state, a normal state, and a smooth state based on a propagation environment signal received from the path network 122, 124, 126, and 128. [ That is, the apparatus 130 for providing a policy includes setting at least one parameter among Rx, Tx, Ec / Io, Received Signal Strength Indication (RSSI), a transmission rate, and the number of assigned terminals, which are parameters included in a radio wave environment signal, to a preset network state threshold value. Compare network status with In this case, the policy providing apparatus 130 compares the parameter with the network state threshold and recognizes the network state as a congestion state when the parameter exceeds (or falls below) the network state threshold. In addition, the policy providing apparatus 130 compares the parameter with the network state threshold and recognizes the network state as a smooth state when the parameter is less than the network state threshold. In addition, the policy providing apparatus 130 compares the parameter with the network state threshold and recognizes the network state as a general state when the parameter is included in the error tolerance of the network state threshold.

Hereinafter, a process of generating the policy response signal corresponding to the policy request signal received from the terminal 110 will be described. The policy providing device 130 checks the network status to generate a policy response signal, and generates a policy response signal including at least one of policy request period information, a threshold value, and priority information according to the network status. At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. That is, the threshold value may be set to be equal to or greater than at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128, the traffic transmission state of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit traffic at a minimum at a minimum. The policy providing apparatus 130 periodically transmits the policy response signal to the terminal 110.

Hereinafter, a process of controlling the traffic by the policy providing device 130 using the optimal network will be described. The policy providing device 130 receives a policy request signal including transmitter identification information from the terminal 110 and determines whether there is a WLAN network 126 around the terminal 110 based on the received transmitter identification information. If there is a WLAN network 126 around the terminal, the control unit transmits the WLAN network access request signal to the terminal through the heterogeneous network mobility securing device 150. In addition, the policy providing device 130 recognizes a network state of the cellular network 122, 124, and 128, generates a policy response signal including a policy determined based on the network state, and generates a policy response signal. 110). In addition, the policy providing device 130 checks the current location of the terminal 110 by using the transmitter identification information, and when the current location is within a preset range of the installation location of the preset communication company AP, the WLAN around the terminal. It is determined that there is a network 126. In addition, when determining that there is a WLAN network 126 around the terminal, the policy providing device 130 transmits a terminal control signal to the heterogeneous inter-network mobility securing device 150 to wirelessly transmit the heterogeneous network inter- mobility mobility securing device 150. A WLAN network comprising at least one of a search command for the LAN network 126, a turn off command for the cellular network 122, 124, and 128 and a turn on command for the WLAN network 126. The connection request signal is transmitted to the terminal 110.

The content providing apparatus 140 is a kind of server that performs content storage and management for transmitting or receiving data traffic of the terminal 110. That is, the content providing apparatus 140 provides the terminal 110 with a non-real-time traffic response signal including the content corresponding to the non-real-time traffic request signal. The content providing apparatus 140 receives the non-real-time traffic including the content corresponding to the non-real-time traffic request signal received from the terminal 110 via the path network 122, 124, 126, and 128 in the network 120 And transmits a response signal to the terminal 110 via the network 120. Here, the content may include at least one of text data, image data, and image data. In addition, the content providing apparatus 140 has the same hardware configuration as that of a typical Web server or a network server. In addition, software modules include program modules implemented in any language such as C, C ++, Java, Visual Basic, and Visual C. The content providing apparatus 140 may be implemented as a web server or a network server. The web server is generally connected to an unspecified number of clients and / or other servers through an open computer network such as the Internet, Means a computer system that accepts a request to perform an operation of a server and derives a result of the operation, and computer software (a web server program) installed for the computer system.

The heterogeneous network mobility securing device 150 is an access network discovery and selection function (ANDSF) server, and the 3G network 122, the 4G network 124, the WLAN network 126, and the N-th network as one terminal 110. And a device that allows different networks such as 128 to be freely moved and connected. In addition, the heterogeneous network mobility securing device 150 is interlocked with the policy providing device 130 and the terminal 110, receives a terminal control signal for a specific terminal from the policy providing device 130, the wireless LAN network to the terminal A WLAN network connection request comprising at least one of a search command for 126, a turn off command for cellular network 122, 124, and 128 and a turn on command for WLAN network 126. The signal is transmitted to the terminal 110.

The process of controlling the non-real time traffic by the terminal 110, the policy providing apparatus 130, and the content providing apparatus 140 shown in FIG. 1 will be described as follows. The terminal 110 receives the policy response signal from the policy providing apparatus 130 that confirms the network status of the path networks 122, 124, 126, and 128 that are communicating with each other, and performs adaptive traffic control .

The terminal 110 manages traffic in non-real time according to a policy response signal received from the policy providing apparatus 130 using the traffic control application 112 installed.

The terminal 110 transmits a network state (a physical layer, an RF layer, a MAC layer, an IP layer, and an IP layer) during traffic transmission (downloading or uploading) to the content providing apparatus 140 using the traffic control application 112 Layer, and so on).

The terminal 110 controls whether or not traffic transmission (downloading or uploading) is blocked based on the network status information by using the loaded traffic control application 112.

The terminal 110 controls traffic transmission (downloading or uploading) by sharing a traffic transmission policy (policy response signal) with the traffic policy providing apparatus 130 based on periodic or additional events using the traffic control application 112 do.

The policy providing apparatus 130 dynamically changes the threshold value and the priority information included in the policy response signal according to the traffic transmission request time of the traffic (using the traffic control application 112 mounted on the terminal 110) do.

The policy providing apparatus 130 manages a traffic user for each of the transmitters 210 and 220 in the network 120 and performs a policy change to control the number of simultaneously permitted users.

2 is a block diagram schematically showing a network according to the present embodiment.

The network 120 according to the present embodiment includes a 3G network 122, a 4G network 124, and a WLAN network 126.

The 3G network 122 includes a first transmitter 210, a data processor 212, a data gateway 214, a 3G charging gateway 216, and a 3G PCRF 218. 2 illustrates that the 3G network 122 includes only the first transmitter 210, the data processor 212, the data gateway 214, the 3G charging gateway 216, and the 3G PCRF 218, It is to be understood by those skilled in the art that various changes and modifications may be made to the elements included in the 3G network 122 without departing from the essential characteristics of the present embodiment It will be understood that the invention may be varied in many ways.

The UTRAN connected to the 3G network 122 shown in FIG. 2 refers to a Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network, and the GERAN is a Global System for Mobile Communications (EDGE) . UTRAN, GERAN are included in the 3G network 122. [

The terminal 110 supports both the 3G network 122 and the 4G network 124 so that in the 3G network 122 the terminal 110 communicates with the UTRAN over the Uu interface and with GERAN over the Um interface. The UTRAN communicates with the data processor 212 via the Iu-ps interface and communicates with the exchange via the Iu-cs interface. The GERAN communicates with the data processor 212 via the Gb interface and with the exchange via the A interface. Terminal 110 supports both 3G network 122 and 4G network 120 so that data processor 212 communicates with data gateway 214 via a Gn interface and with 3G PCRF 218 via Gx interface. And communicate with the exchange via the Gs interface.

The first transmitter 210 refers to a transmitter in the 3G network 122 and performs various functions necessary for wireless call processing such as location registration, radio channel assignment, and handoff in the 3G network 122. Here, the first transmitter 210 is preferably a node B, but is not limited thereto. In addition, the first transmitter 210 receives the call request signal from the terminal 110 through the traffic channel among the signal channels in the 3G network 122, performs baseband signal processing, wired / wireless conversion, and transmits / . The first transmitter 210 receives the call request signal or the non-real time traffic request signal from the terminal 110 through the traffic channel among the signal channels and transmits the received call request signal or the non real time traffic request signal through the transmission controller To the content providing apparatus 140. Here, the first transmitter 210 is preferably a transmitter, but is not necessarily limited thereto, and may be extended to UTRAN and GERAN.

The data processor 212 transmits a data packet to the mobile terminal 110 on the move and generates call detail information and billing data for the data packet transmitted to the terminal 110 and transmits the generated call detail information and billing data to the 3G billing gateway 216 . Here, the data processor 212 may be divided into a plurality of data processors according to the installed area. Here, the data processor 212 is preferably implemented as a Support GPRS Serving Node (SGSN), but is not limited thereto.

The data gateway 214 is a node responsible for a connection function between a backbone network and an external packet data network and transmits packet data received from the data processor 212 in an appropriate packet data protocol (PDP) format (e.g., IP, X.25) And converts the Packet Data Protocol (PDP) address of the incoming packet data to the recipient's global mobile communication system (GSM) address. The data gateway 214 also stores the address and user profile of the current user's data processor in the location register of the data processor 212 and performs authentication and charging functions. The data gateway 214 is preferably a gateway GPRS support node (GGSN), but is not limited thereto.

The 3G billing gateway 216 collects respective call log information and billing data for the data packet received by the overseas subscriber terminal 110 while moving from a plurality of different data processors 212 and examines the call log information. It generates integrated billing data by integrating billing data with the same billing ID into one data and transmits the billing data to the billing center. In addition, the 3G charging gateway 216 performs a function of collecting the data packet amount of all the charging data having the same charging ID and generating the integrated charging data. In addition, the 3G charging gateway 216 collects call detail information and billing data from at least one data processor of the plurality of data processors 212 in accordance with the handover of the terminal 110. In addition, the 3G charging gateway 216 performs the function of generating the integrated charging data by using the identifier (IMSI: International Mobile Subscriber Identity) and the charging ID. On the other hand, the charging ID refers to a value that the data processor 212 allocates from the data gateway 214 when charging data of the terminal 110 is generated. That is, the billing ID is a value that does not change even when the same subscriber moves the plurality of data processors 212 in the same data gateway 214.

The 3G billing gateway 216 is a device that performs content billing information on content transmitted from the content providing apparatus 140 to the terminal 110 and charges the billing information. That is, when the terminal 110 receives the content from the content providing apparatus 140, the 3G billing gateway 216 updates the content usage amount information and charges the required amount of the terminal 110 based on the updated information Lt; / RTI >

The 3G PCRF 218 can detect a packet included in the service data using a preset rule and apply the applied QoS (Quality of Service). In addition, the 3G PCRF 218 operates based on the policy determined by the policy providing device 130 and the billing control function by the 3G charging gateway 216. That is, the 3G PCRF 218 can detect the service data of the policy providing apparatus 130 and the 3G charging gateway 216, and can perform network control such as QoS.

Hereinafter, the 4G network 124 will be described. The 4G network 124 includes a second transmitter 220, a control processor 222, a traffic processor 224, a packet processor 226, a 4G charging gateway 228, and a 4G PCRF 230. 2, the 4G network 124 includes only the second transmitter 220, the control processor 222, the traffic processor 224, the packet processor 226, the 4G charging gateway 228, and the 4G PCRF 230 Those skilled in the art will appreciate that the present invention is not limited to the 4G network 124 but may be embodied in a 4G network 124 without departing from the essential characteristics of the present embodiment. It will be understood that the invention may be varied in many ways.

The E-UTRAN coupled to the 4G network 124 shown in FIG. 2 refers to an Evolved-UTRAN. The E-UTRAN is included in the 4G network 124. The terminal 110 supports both the 3G network 122 and the 4G network 124 so that in the 4G network 124 the terminal 110 communicates with the E-UTRAN over the LTE-Uu interface and the E-UTRAN communicates with the S1- And communicates with the control processing unit 222 via the U interface.

e Node B is a device that supports Long Term Evolution (LTE), and functions as RF transmission, transmission / reception, signal strength, quality measurement, baseband signal processing, and channel card (channel card resource management) . The second transmitter 220 and the Evolved Packet Core (EPC) (i.e., the control processing unit 222, the traffic processing unit 224, and the packet processing unit 226) may be collectively referred to as EPS (Evolved Packet System). That is, the second transmitter 220 refers to a transmitter in the LTE network, which is a 4G network 124, and performs various functions necessary for wireless call processing such as location registration, radio channel assignment, and handoff in the 4G network 124 . Here, the second transmitter 220 is preferably an eNode B, but is not limited thereto. Also, the second transmitter 220 receives the call request signal from the terminal 110 through the traffic channel among the signal channels in the 4G network 124, performs baseband signal processing, wired / wireless conversion, and transmits / . The second transmitter 220 receives the call request signal or the non-real time traffic request signal from the terminal 110 through the traffic channel of the signal channel and transmits the received call request signal or the non- To the content providing apparatus 140 via the controller. Here, the second transmitter 220 is preferably a transmitter, but is not limited thereto, and can be extended to an E-UTRAN.

A control processor 222, a traffic processor 224, and a packet processor 226, and may be referred to as a packet core. This packet core refers to EPC. The control processor 222 basically performs a mobility management function for the terminal 110. Here, the control processor 222 is preferably an MME (Mobile Management Entity), but is not limited thereto. That is, the control processing unit 222 performs call control such as location registration, paging, and authentication, and performs a legitimate eavesdropping function and a data call control function for the call control unit. The control processor 222 is a node for managing subscriber information and mobility of the terminal 110 and is responsible for session management, idle subscriber management, paging, and subscriber authentication functions.

The traffic processing unit 224 is preferably an S-GW (Serving Gateway), but is not limited thereto. That is, the traffic processor 224 refers to a gateway to an access network and manages mobility in the 3G network 122. In addition, the traffic processor 224 processes legitimate eavesdropping on call traffic, and performs a traffic processing function. The traffic processor 224 is a session controller for processing payload traffic according to a set session and a user plane node for interworking with a second transmitter 220 as a user plane node, Supports handover, sets a packet processing unit 226 and a PDP context, and delivers PDU (Packet Data Unit) using tunneling. On the other hand, the traffic processing unit 224 and the control processing unit 222 can be flexibly expanded according to the increase of the traffic or the increase of the control signal.

The packet processing unit 226 is preferably a P-GW (PDN Gateway), but is not limited thereto. The packet processing unit 226 refers to a gateway to a PDN (Packet Data Network) such as an IMS (IP Multimedia Subsystem) and the Internet, manages mobility for a Non-3GPP network, performs charging according to a policy, and blocks harmful packets. do. The packet processor 226 is a session control and user plan for assigning IP of the terminal 110 and interworking with an external Internet network and a non-3GPP network. The packet processor 226 is provided with a traffic processor 224 for packet service, ) Information and has tunneling and IP routing functions. In addition, the packet processing unit 226 delivers the PDU to the traffic processing unit 224 and the external network.

The 4G charging gateway 228 is a device that performs content charging information on content transmitted from the content providing device 140 to the terminal 110 and charges the corresponding content. That is, when the terminal 110 receives the content from the content providing apparatus 140, the 4G charging gateway 228 updates the content usage amount information, and charges the terminal 110 based on the updated information Lt; / RTI >

The 4G PCRF 230 can detect a packet included in the service data using a predetermined rule and apply the applied QoS. The 4G PCRF 230 also operates based on the policy determined by the policy providing device 130 and the billing control function by the 4G charging gateway 228. [ That is, the 4G PCRF 230 can detect the service data of the policy providing apparatus 130 and the 4G charging gateway 228, and perform network control such as QoS.

3 is a block diagram schematically showing a traffic control apparatus according to the present embodiment.

The terminal 110 mounted with the traffic control application 112 is an internal view of the traffic control device 300 as a separate device, . ≪ / RTI > That is, the traffic control device 300 shown in FIG. 3 is an embodiment in which the traffic control application 112 is implemented as a separate device. The traffic control device 300 according to the present embodiment includes a signal generator 310, Transmission order determiner 320, policy manager 330, traffic requester 340, traffic transceiver 350, traffic controller 360, terminal network recognizer 362, policy requester 370 and restart Also includes a performer 380. In the present embodiment, the traffic control apparatus 300 includes a signal generator 310, a transmission order determiner 320, a policy manager 330, a traffic requester 340, a traffic transceiver 350, and a traffic controller 360. ), The terminal network recognizer 362, the policy request unit 370, and the retry performer 380 are included. However, this is merely illustrative of the technical idea of the present embodiment. Those skilled in the art may apply various modifications and variations to the components included in the traffic control apparatus 300 without departing from the essential characteristics of the present embodiment.

The signal generation unit 310 generates a non-real-time traffic request signal based on an inputted user's operation or command. Here, the non-real-time traffic request signal is a kind of traffic request signal. When the user inputs a command for requesting specific contents by operating the terminal 110, the terminal 110 transmits the contents to the contents providing apparatus 140 The terminal 110 controls the traffic according to the network state of the path network 122, 124, 126, and 128, so that when the network state is congested, the non-real- Traffic request signal. Meanwhile, the same concept can be applied to the non-real-time traffic response signal corresponding to the non-real-time traffic request signal.

The transmission order determining unit 320 can determine the order of the generated traffic request signals when transmitting the generated traffic request signals to the content providing apparatus 140. [ That is, the transmission order determining unit 320 determines the transmission order of the non-real-time traffic request signal transmitted to the content providing apparatus 140 according to the inputted user's operation, the order of the commands, or the priority information based on the content type .

The policy management unit 330 transmits a policy request signal to the policy providing apparatus 130 and receives a policy response signal corresponding to the policy request signal. In addition, the policy manager 330 transmits a policy request signal to the policy providing device and receives a policy response signal corresponding to the policy request signal. The policy response signal is a signal including at least one of policy request period information, a threshold value, and priority information according to a network status. At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. In addition, the threshold value may include at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126, and 128, the traffic transmission status of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit traffic at a minimum at a minimum. In addition, the policy manager 330 transmits a policy request signal including transmitter identification information to the policy providing device 130 and receives a policy response signal from the policy providing device 130 in response to the policy request signal.

The traffic requesting unit 340 transmits a non-real-time traffic request signal to the content providing apparatus 140 based on the transmission order determined by the transmission order determining unit 320. [ The traffic transceiver unit 350 may download the non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing apparatus 140 via the path network 122, 124, 126, or 128, And uploads the content previously stored in the content providing apparatus 140 to the content providing apparatus 140. At this time, when downloading the non-real-time traffic response signal from the content providing device 140, the traffic transceiver 350 downloads the non-real-time traffic response signal to the preset storage area according to the data type of the non-real-

The traffic controller 360 downloads the non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing device 140 via the path network 122, 124, 126, or 128, or the terminal 110. The pre-stored content is uploaded to the content providing device 140, and the download or upload (traffic) is controlled based on the recognized network state at the time of downloading or uploading.

Hereinafter, a process in which the traffic control unit 360 recognizes the network state and adaptively controls the non-real time traffic will be described. The traffic control unit 360 determines whether traffic control is performed based on the network status of the path network 122, 124, 126, or 128 that is recognized through the network recognition unit 362 during downloading or uploading, And controls downloading or uploading (traffic) based on the control. To be more specific, the traffic control unit 360 compares the transmission rate with the threshold value included in the policy response signal when the download or upload is perceived through the network recognition unit 362, , It is recognized that the network status is congested and download upload (traffic) is stopped. Also, the traffic control unit 360 recognizes that the network state is congested when the main quality indicators of Rx and Tx among the parameters related to the traffic control included in the policy response signal are less than the threshold value through the network recognition unit 362 Stop downloading or uploading (traffic). The traffic control unit 360 also controls the location of the terminals allocated to the transmitters 210 and 220 in the path networks 122, 124, 126, and 128 and the transmitters 210 and 220 through the network aware unit 362, (Traffic) for the resource efficiency of the path networks 122, 124, 126, and 128 if it is determined that the distance from the path network 122, 124, 126, and 128 exceeds the predetermined distance. In addition, the traffic controller 360 stops downloading or uploading (traffic) when the terminal battery state is lower than the threshold or the terminal temperature exceeds the threshold.

Hereinafter, the process of the traffic control unit 360 to control the traffic using the optimal network will be described. The traffic controller 360 performs a download through the recognized WLAN network 126, but based on the network state of the cellular network 122, 124, and 128 when it is out of coverage of the WLAN network 126. Control to perform a download via the cellular network 122, 124, or 128. That is, when the traffic controller 360 receives the WLAN network access request signal from the heterogeneous network mobility securing device 150 while performing the download through the cellular network 122, 124, or 128, the cellular network 122, After turning off any one of 124 and 128, the wireless LAN network 126 is turned on, and the wireless LAN network 126 downloads regardless of the network state. Here, the WLAN network access request signal includes a search command for the WLAN network 126, a turn off command for the cellular network 122, 124, and 128, and a turn on command for the WLAN network 126. It includes at least one command. In addition, the traffic controller 360 first searches for the WLAN network 126 upon initial download, and then, if the WLAN network 126 is not detected, the traffic controller 360 may select any one of the cellular networks 122, 124, and 128 based on the network state information. To download). In addition, the traffic controller 360 determines that the coverage of the WLAN network 126 is out of coverage when the received signal strength for the WLAN network 126 is less than a preset threshold.

The terminal network acknowledgment unit 362 is aware of the network conditions for the path networks 122, 124, 126 and 128 with which the terminal 110 is communicating. Hereinafter, the process of recognizing the network status of the path networks 122, 124, 126, and 128 will be described. The terminal network recognition unit 362 compares the network state with the radio wave environment signal received from the path network 122, 124, 126, or 128 based on the threshold included in the policy response signal, and compares the network state with a congestion state and a general state. And a smooth state. In this case, the terminal network recognizing unit 362 recognizes the network state by comparing at least one parameter among Rx, Tx, Ec / Io, RSSI, transmission rate, and the number of allocated terminals, which are parameters included in the radio wave environment signal, with a preset threshold value. do. In addition, the terminal network recognition unit 362 compares the parameter with a threshold and recognizes the network state as a congested state when the parameter exceeds (or falls below) the network state threshold. In addition, the terminal network recognition unit 362 compares the parameter and the threshold value and recognizes the network state as a smooth state when the parameter is less than the threshold value. In addition, the terminal network recognition unit 362 compares the parameter with the threshold and recognizes the network state as a general state when the parameter is included in the error tolerance of the threshold. That is, the terminal network recognizer 362 recognizes the network state of the cellular network 122, 124, or 128 based on the policy response signal.

Hereinafter, a process of retrying non-real-time traffic that has been interrupted by the retry execution unit 380 will be described. The retry execution unit 380 operates to repeat the download or upload (traffic) retry according to the policy response signal. To more specifically describe the operation of the retry execution unit 380, the retry execution unit 380 performs a download or upload (traffic) retry when a predetermined timer time elapses. Also, the retry execution unit 380 performs a download or upload (traffic) retry when the path network 122, 124, 126, and 128 is changed to another network. Also, the retry execution unit 380 performs a download or upload (traffic) retry when a new non-real time traffic request signal is received from the signal generation unit 310. [

4 is a block diagram schematically illustrating an apparatus for providing a policy according to the present embodiment.

The policy providing apparatus 130 according to the present exemplary embodiment includes a communication unit 410, a determination unit 412, a requesting unit 414, a network recognition unit 422, a policy determination unit 430, and a policy transmission unit 440. Include. In the present embodiment, the policy providing device 130 includes only the communication unit 410, the determination unit 412, the requesting unit 414, the network recognition unit 422, the policy determination unit 430, and the policy transmission unit 440. Although this is merely an example of describing the technical idea of the present embodiment, those skilled in the art to which the present embodiment belongs will have a policy providing apparatus 130 without departing from the essential characteristics of the present embodiment. For the components included in the) will be applicable to various modifications and variations.

The communication unit 410 interworks with the terminal 110 via the network 120 and receives a policy request signal from the terminal 110. That is, the communication unit 410 receives a policy request signal including transmitter identification information from the terminal 110. Here, the data usage information is information including at least one of the number of data packets and the data packet usage amount information for each number of data packets.

The determination unit 412 determines whether there is a WLAN network 126 around the terminal 110 based on the transmitter identification information. In addition, the determination unit 412 checks the current location of the terminal 110 using the transmitter identification information, and if the current location is within a preset range of the installation location of the preset carrier AP, the WLAN network around the terminal. It is determined that there is (126).

The request unit 414 controls to transmit a WLAN network access request signal to the terminal 110 through the heterogeneous network mobility securing device 150 when the WLAN network 126 is around the terminal 110. In addition, when the requester 414 determines that the WLAN network 126 is around the terminal, the request unit 414 transmits a terminal control signal to the heterogeneous inter-network mobility securing apparatus 150 to transmit the WLAN in the heterogeneous network mobility securing apparatus 150. A WLAN network connection comprising at least one of a search command for the network 126, a turn off command for the cellular network 122, 124, and 128 and a turn on command for the WLAN network 126. The request signal is transmitted to the terminal 110.

The network recognizer 422 recognizes the network state of each terminal assigned to the route network 122, 124, 126, and 128. Hereinafter, the network recognition unit 422 will be described for the process of recognizing the network status for any one of the path network (122, 124, 126 and 128). The network recognizer 422 recognizes the network state as one of a congestion state, a general state, and a smooth state based on the radio wave environment signal received from the path network 122, 124, 126, or 128. At this time, the network recognition unit 422 compares at least one or more parameters of parameters Rx, Tx, Ec / Io, RSSI, transmission rate, and the number of allocated terminals included in the radio wave environment signal with a preset network state threshold to compare the network state. Be aware. In addition, the network recognition unit 422 compares the parameter with the network state threshold and recognizes the network state as a congestion state when the parameter exceeds (or falls below) the network state threshold. In addition, the network recognizer 422 compares the parameter with the network state threshold and recognizes the network state as a smooth state when the parameter is less than the network state threshold. In addition, the network recognizer 422 compares the parameter with the network state threshold and recognizes the network state as a general state when the parameter is included in the error tolerance of the network state threshold. Meanwhile, the network recognizer 422 recognizes a network state of the cellular network 122, 124, or 128.

The policy determiner 430 determines and manages a policy related to data traffic based on the network state recognized through the network recognizer 422. The policy decision unit 430 generates a policy response signal including a policy determined based on the network state. Hereinafter, a process of generating a policy response signal corresponding to the policy request signal received from the terminal 110 by the policy decision unit 430 will be described. The policy decision unit 430 checks the network state and generates a policy response signal including at least one of policy request cycle information, threshold value, and priority information according to the network state in order to generate the policy response signal. At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. That is, the threshold value may be set to be equal to or greater than at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128, the traffic transmission state of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit traffic at a minimum at a minimum. The policy transmitter 440 transmits a policy response signal to the terminal 110.

5 is a flowchart illustrating a traffic control method using an optimal network according to the present embodiment.

The terminal 110 generates a non-real-time traffic request signal by a user's operation or command, and transmits a policy request signal including the transmitter identification information to the policy providing device 130 (S510). Thereafter, the terminal 110 receives a policy response signal from the policy providing device 130 in response to the policy request signal, and based on the received policy response signal, the network state of the cellular network 122, 124, and 128. Recognizes and downloads the traffic response signal corresponding to the traffic request signal from the content providing device 140. The policy providing device 130 receives a policy request signal including transmitter identification information from the terminal 110 and checks a current position of the terminal 110 using the received transmitter identification information (S520).

The policy providing device 130 checks whether there is a WLAN network 126 around the terminal 110 based on the received transmitter identification information (S530). In operation S530, when the current location of the terminal 110 exists within a preset range of an installation location of a preset communication company AP, the policy providing device 130 determines that there is a WLAN network 126 around the terminal. Subsequently, when the policy providing device 130 determines that there is a WLAN network 126 around the terminal, the device 130 provides a terminal control signal to the heterogeneous inter-network mobility securing device 150 to wirelessly transfer the inter-network mobility between the mobile device 150. A WLAN network comprising at least one of a search command for the LAN network 126, a turn off command for the cellular network 122, 124, and 128 and a turn on command for the WLAN network 126. The connection request signal is transmitted to the terminal 110.

As a result of checking in step S530, when the policy providing device 130 has the WLAN network 126 around the terminal 110 based on the received transmitter identification information, the terminal 110 secures mobility between heterogeneous networks 150. Control to transmit the WLAN network access request signal to the terminal through (S540). Here, the WLAN network access request signal includes a search command for the WLAN network 126, a turn off command for the cellular network 122, 124, and 128, and a turn on command for the WLAN network 126. It includes at least one command.

When the terminal 110 receives a WLAN network access request signal from the heterogeneous network mobility securing device 150 while performing a download through the cellular network 122, 124, or 128, the cellular network 122, 124, and 128. After performing the turn-off for any one of the above), the wireless LAN network 126 is turned on, and the download is performed regardless of the network state through the wireless LAN network 126 (S550). That is, the terminal 110 preferentially searches for the WLAN network 126 at the time of first download, and then, if the WLAN network 126 is not detected, any one of the cellular networks 122, 124, and 128 based on the network state information. To download).

The terminal 110 checks whether the wireless LAN network 126 is out of coverage (S560). In step S560, the terminal 110 determines that the coverage of the WLAN network 126 is out of coverage when the received signal strength for the WLAN network 126 is less than a preset threshold. As a result of checking in step S560, when the coverage of the WLAN network 126 is out of coverage, the terminal 110 is based on the network state of the cellular network 122, 124, and 128. Any one) is controlled to perform the download (S570).

In FIG. 5, steps S510 to S570 are described as being sequentially executed. However, these are merely illustrative examples of the technical idea of the present embodiment. 5 may be modified and modified by changing the order described in FIG. 5 or executing one or more steps of steps S510 to S570 in parallel without departing from the essential characteristics, and thus, FIG. It is not limited.

As described above, the traffic control method using the optimal network according to the present embodiment described in FIG. 5 may be implemented in a program and recorded in a computer-readable recording medium. A computer-readable recording medium for recording a program for implementing a traffic control method using an optimal network according to the present embodiment includes all kinds of recording devices for storing data that can be read by a computer system. Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present embodiment can be easily inferred by programmers in the technical field to which the present embodiment belongs.

6 is an exemplary view for explaining a traffic control method according to the present embodiment.

The traffic control application 112 is installed in the terminal 110 to recognize the status of the path network 122, 124, 126, and 128 with which the terminal 110 is communicating, It is a kind of program that manages data traffic. The policy providing device 130 recognizes the network status of each terminal assigned to the path networks 122, 124, 126, and 128, and determines and manages policies related to data traffic based on the detected network status Function. The content providing apparatus 140 is a kind of server that performs content storage and management for transmitting or receiving data traffic of the terminal 110. The traffic processing module refers to a communication processing unit provided in the terminal 110. That is, the traffic processing module illustrated in FIG. 6 is a kind of communication processing module included in the terminal 110. The traffic processing module illustrated in FIG. 6 stores content received from the content providing apparatus 140 or transmits data traffic stored in the terminal 110. 140).

'①' shown in FIG. 6 indicates that a non-real time traffic transmission request signal is generated by a user's selection, manipulation or user type input from the terminal 110. That is, the terminal 110 generates a non-real-time traffic request signal based on an input user operation or command.

'②' shown in FIG. 6 manages the generated non-real-time traffic transmission request signal in the traffic control application 112 mounted in the terminal 110 and requests traffic transmission according to priority information based on sequential or content type. Indicates order adjustment. That is, the terminal 110 can determine the order of the generated traffic request signal when transmitting the generated traffic request signal to the content providing apparatus 140. In other words, the terminal 110 determines the transmission order of the non-real-time traffic request signal transmitted to the content providing apparatus 140 according to the input operation of the user or the order of the command or the priority information based on the type of the content. Also, the terminal 110 transmits a non-real-time traffic request signal to the contents providing apparatus 140 based on the determined transmission order.

'③' shown in FIG. 6 indicates that the terminal 110 inquires of the traffic transmission to the policy providing device 130. The policy providing apparatus 130 then determines the status of the terminal 110 and returns a policy request period and a traffic control related threshold value. That is, the terminal 110 transmits a policy request signal to the policy providing apparatus 130 and receives a policy response signal corresponding to the policy request signal. Here, the policy response signal received by the terminal 110 from the policy providing apparatus 130 is a signal including at least one of policy request period information, a threshold value, and priority information according to the network status.

(A) The policy providing device 130 transmits a threshold value for a plurality of parameters for determining traffic transmission control in order to determine whether or not the network is in a network state. That is, the threshold value is information including respective threshold values for a plurality of parameters associated with traffic control.

Ⓑ At this time, the threshold is adaptively adjusted according to the number of terminals located in the transmitters 210 and 220, the traffic transmission status of the terminal, the transmission request time of the terminal, etc. (for example, the threshold is transmitted by the terminals located in the base station). If the request time is old based on the request time, the threshold value is lower than that of the terminal having a short request time.). That is, the threshold value may be set to be equal to or greater than at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128, the traffic transmission state of each terminal, It is a value that is set adaptively according to information.

The policy providing apparatus 130 manages the number of traffic transmission terminals per base station to prevent unnecessary congestion. That is, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range.

The policy providing device 130 has a time (priority traffic transmission at a minimum time) and a network type (for example, preferentially traffic transmission in a Wi-Fi network). That is, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit the traffic with priority at the minimum.

6 indicates data transmission requests and transmissions to the non-real-time traffic request URL (Uniform Resource Locator) and the content providing device 140. That is, the terminal 110 transmits a non-real-time traffic request signal to the content providing apparatus 140 corresponding to the URL.

In FIG. 6, '⑤' indicates a download request from the content providing device 140 to be stored in a storage space according to the type of content, and in the case of uploading, the uploaded data is requested to the content providing device 140 to store the data stored in the terminal. The transmission is indicated to the content providing device 140. That is, the terminal 110 downloads the non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing apparatus 140 via the path network 122, 124, 126, or 128, To the content providing apparatus 140. The content providing apparatus 140 receives the content, At this time, when the terminal 110 downloads the non-real-time traffic response signal from the content providing device 140, the terminal 110 downloads the non-real-time traffic response signal to the preset storage area according to the data type of the non-real-

'⑥' shown in FIG. 6 indicates whether to control traffic transmission by recognizing a network state during traffic transmission of the terminal. That is, the terminal 110 recognizes the network state of the route network 122, 124, 126, and 128 based on the policy response signal, and determines whether to control traffic based on the recognized network state at the time of downloading or uploading. Then, the download or upload (traffic) is controlled based on the determined traffic control.

Ⓐ If the current transmission rate is lower than the threshold by comparing the download and upload transfer rate with the threshold value, it is determined that the network condition is congested and the traffic transmission is stopped (for example, threshold = 200 kbps, the current download and upload rate is less than 200 kbp). If you think the network is not good). That is, the terminal 110 compares the transmission rate with the threshold value included in the policy response signal at the time of downloading or uploading, and if the transmission rate is less than the threshold value, the terminal 110 recognizes that the network state is congested and stops download upload (traffic).

If the main quality indicator of the RF layer and physical layer for Rx and Tx of the terminal 110 is lower than the threshold value, it is determined that the network state is bad and the traffic transmission is stopped (e.g., when the Ec / Io value is low, If the wireless state is not good, and the Tx headroom value is low, the wireless state of the upload is bad. That is, if the key quality indicators of Rx and Tx among the parameters related to the traffic control included in the policy response signal are less than the threshold value, the terminal 110 recognizes that the network state is congested and stops downloading or uploading (traffic) .

If it is relatively far from the transmitters 210 and 220 according to the position of the terminal 110, the transmission of traffic for resource efficiency of the network is stopped (for example, the level of the Modulation Coding Scheme (MCS) If it is determined that the transmitters 210 and 220 are far from the terminal 110, the network status is determined to be bad). That is, if the distance between the position of the terminal assigned to the transmitter 210, 220 in the path network 122, 124, 126, and 128 and the transmitter 210, 220 exceeds a predetermined distance It stops downloading or uploading (traffic) for resource efficiency of the path networks 122, 124, 126 and 128. [

(For example, when the battery state is lower than the threshold value, when the temperature of the terminal 110 is high, the transmission is stopped). That is, the terminal 110 stops downloading or uploading (traffic) when the terminal battery status is less than the threshold value or when the terminal temperature exceeds the threshold value.

6 indicates transmission of network control information to the policy providing device 130 according to the threshold transmitted by the policy providing device 130 and the policy query period according to the network state. That is, the terminal 110 transmits a policy request signal to the policy providing apparatus 130 according to the policy request period information included in the policy response signal.

Thereafter, the policy providing apparatus 130 performs a traffic transmission retry according to the transmitted policy (policy response signal) in step (8), and repeats the processes of (3) to (7). That is, the process of retrying the non-real-time traffic of the terminal 110 will be described. The terminal 110 operates to repeat the download or upload (traffic) retry according to the policy response signal.

(A) Retry after Timer: Retry transmission of a traffic after a specific waiting time (transmitted by the policy providing device 130) after stopping the traffic transmission. That is, the terminal 110 performs a download or upload (traffic) retry when the preset timer expires.

B) Retry in accordance with network modem change: Retries when changing the network modem to the wireless LAN network 126, the 3G network 122, the 4G network 124, and the like. That is, the terminal 110 also performs a download or upload (traffic) retry when the path network 122, 124, 126 and 128 is changed to another network.

Ⓒ When a new non-real time traffic transmission is requested, retry: Retry if user's selection / operation or user type is added. That is, the terminal 110 performs a download or upload (traffic) retry when a new non-real-time traffic request signal is received.

7 is a flowchart illustrating an adaptive non real-time traffic control method according to the present embodiment.

The terminal 110 generates a non-real time traffic request signal by an input of a user's manipulation or command (S710). The terminal 110 may determine the order of transmission of the generated traffic request signal to the content providing apparatus 140. That is, the terminal 110 determines the transmission order of the non-real-time traffic request signal transmitted to the content providing device 140 according to the order of the input or operation of the user or priority information based on the type of the content (S720). .

The terminal 110 transmits a policy request signal to the policy providing device 130 and receives a policy response signal corresponding to the policy request signal (S730). In operation S730, the policy response signal received by the terminal 110 from the policy providing device 130 is a signal including at least one of policy request period information, threshold value, and priority information according to the network state. At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. In addition, the threshold value may include at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126, and 128, the traffic transmission status of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit traffic at a minimum at a minimum. That is, the traffic parameters may include Rx, Tx, Ec / Io, rate, number of assigned terminals, and the like.

The terminal 110 transmits a non-real-time traffic request signal to the content providing device 140 based on the determined transmission order (S740). The terminal 110 downloads the non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing device 140 via the path network 122, 124, 126, or 128, or in the terminal 110. The prestored content is uploaded to the content providing device 140 (S750). In operation S750, when the non-real-time traffic response signal is downloaded from the content providing device 140, the terminal 110 downloads the non-real-time traffic response signal to a preset storage area according to the data type of the non-real-time traffic response signal.

The terminal 110 recognizes the network state of the route network 122, 124, 126, and 128 based on the policy response signal, and determines whether to control traffic based on the recognized network state at the time of downloading or uploading. The download or upload (traffic) is controlled based on the determined traffic control (S760). In step S760, the terminal 110 compares the transmission rate and the threshold included in the policy response signal when downloading or uploading, and if the transmission rate is less than the threshold, the terminal 110 recognizes that the network state is congested and stops the download upload (traffic). . That is, when the key quality indicators of Rx and Tx among the parameters related to the traffic control included in the policy response signal are less than the threshold value, the terminal 110 recognizes that the network status is congested and stops downloading or uploading (traffic) . The terminal 110 may also determine that the distance between the location of the terminal assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128 and the transmitter 210, 220 exceeds a predetermined distance It stops downloading or uploading (traffic) for resource efficiency of the path networks 122, 124, 126 and 128. [ In addition, the terminal 110 stops downloading or uploading (traffic) when the terminal battery status is below the threshold value or when the terminal temperature exceeds the threshold value.

The terminal 110 transmits the policy request signal to the policy providing device 130 according to the policy request period information included in the policy response signal (S770). The terminal 110 may retry the interrupted non-real time traffic. That is, the terminal 110 operates to repeat the download or upload (traffic) retry in accordance with the policy response signal (S780). In step S780, the terminal 110 performs a download or upload (traffic) retry when the time of the preset timer has elapsed. In addition, the terminal 110 performs a download or upload (traffic) retry if the path network 122, 124, 126 and 128 is changed to another network. In addition, the terminal 110 performs a download or upload (traffic) retry when a new non-real-time traffic request signal is received.

In FIG. 7, steps S710 to S780 are described as being sequentially executed. However, this is merely illustrative of the technical idea of the present embodiment. 7 may be modified and modified in various ways, such as by changing the order described in FIG. 7 or executing one or more steps of steps S710 to S780 in parallel without departing from the essential characteristics, and therefore, FIG. It is not limited.

8 is a flowchart illustrating a policy management method according to the present embodiment.

The terminal 110 transmits a policy request signal to the policy providing device 130 via the network 120 (S810). In operation S810, the terminal 110 may determine the order of the generated traffic request signal to the content providing device 140. That is, the terminal 110 may determine the transmission order of the non-real-time traffic request signal transmitted to the content providing apparatus 140 according to the input operation of the user or the order of the command or the priority information based on the type of the content. Then, the terminal 110 transmits a non-real-time traffic request signal to the contents providing apparatus 140 based on the determined transmission order.

The terminal 110 receives a policy response signal corresponding to the policy request signal from the policy providing device 130 via the network 120 (S820). In operation S820, the policy providing apparatus 130 may check a network state and generate a policy response signal including at least one of policy request cycle information, threshold value, and priority information according to the network state to generate a policy response signal. . At this time, the threshold value is information including respective threshold values for a plurality of parameters related to traffic control. That is, the threshold value may be set to be equal to or greater than at least one of the number of terminals assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128, the traffic transmission state of each terminal, It is a value that is set adaptively according to information. In addition, the threshold value has a value that limits the number of terminals allocated for each transmitter in the path network (any one of 122, 124, 126, and 128) to within a predetermined range. On the other hand, the priority information has a priority value based on the type of the route network (any one of 122, 124, 126, and 128) or a value set to transmit traffic at a minimum at a minimum. The policy providing apparatus 130 periodically transmits the policy response signal to the terminal 110.

When the terminal 110 receives the policy response signal from the policy providing device 130, the terminal 110 transmits a policy ACK to the policy providing device 130 indicating completion of the reception of the policy response signal via the network 120 (S830). . Thereafter, the terminal 110 transmits a non-real-time traffic request signal to the content providing device 140 via the network 120 (S840). The terminal 110 downloads a non-real-time traffic response signal corresponding to the non-real-time traffic request signal from the content providing apparatus 140 via the network 120 or transmits content previously stored in the terminal 110 to the content providing apparatus 140. Upload to (S850). In operation S850, the terminal 110 may determine the order of the generated traffic request signal to the content providing device 140. That is, the terminal 110 determines the transmission order of the non-real-time traffic request signal transmitted to the content providing apparatus 140 according to the input operation of the user or the order of the command or the priority information based on the type of the content, Real-time traffic request signal to the contents providing apparatus 140 based on the order.

The terminal 110 recognizes the network state of the network 120 at the time of downloading or uploading (S860). In operation S860, the terminal 110 determines whether to control traffic based on the network state of the path network 122, 124, 126, and 128 recognized during the download or upload, and downloads based on the determined traffic control. Or control upload (traffic). That is, the terminal 110 compares the transmission rate with the threshold value included in the policy response signal at the time of downloading or uploading, and if the transmission rate is less than the threshold value, the terminal 110 recognizes that the network state is congested and stops download upload (traffic). That is, when the key quality indicators of Rx and Tx among the parameters related to the traffic control included in the policy response signal are less than the threshold value, the terminal 110 recognizes that the network status is congested and stops downloading or uploading (traffic) . The terminal 110 may also determine that the distance between the location of the terminal assigned to the transmitter 210, 220 in the path network 122, 124, 126 and 128 and the transmitter 210, 220 exceeds a predetermined distance It stops downloading or uploading (traffic) for resource efficiency of the path networks 122, 124, 126 and 128. [ In addition, the terminal 110 stops downloading or uploading (traffic) when the terminal battery status is below the threshold value or when the terminal temperature exceeds the threshold value.

The terminal 110 transmits the policy request signal to the policy providing device 130 according to the policy request period information included in the policy response signal (S870). The terminal 110 receives a policy response signal corresponding to the policy request signal from the policy providing device 130 via the network 120 (S880). In operation S880, the policy providing apparatus 130 checks a network state and generates a policy response signal including at least one of policy request cycle information, threshold value, and priority information according to the network state to generate a policy response signal. .

In FIG. 8, steps S810 to S880 are sequentially described. However, these are merely illustrative examples of the technical idea of the present embodiment. 8 may be modified and modified in various ways, such as by changing the order described in FIG. 8 or executing one or more steps of steps S810 to S880 in parallel without departing from the essential characteristics thereof. It is not limited.

9 is an exemplary diagram for describing non-real-time traffic according to the present embodiment.

The non-real-time traffic according to the present embodiment refers to a technique capable of temporarily delaying transmission of data according to the congestion state of the network 120 in order to make full use of the spare capacity due to the instantaneous load variation of the network 120. [ For this purpose, referring to FIG. 9, as shown in FIG. 9A, the capacity of the network 120 is secured through facility investment and various solutions to cope with exploding data traffic. Due to the high traffic concentration of the day when the number of calls occurs most of the day, the investment burden for securing the capacity and the utilization efficiency of the network 120 are lowered. Therefore, the data transmission service utilizing the surplus capacity of the network 120 shown in FIG. 9A provides a connection and operation scheme of the terminal according to the instantaneous load change of the network 120. To control the load variation of the network 120 as shown in FIG. That is, the terminal 110 recognizes the congestion state of the network 120 in connection with the policy providing apparatus 130, and can provide data download or upload at the most optimized time.

The foregoing description is merely illustrative of the technical idea of the present embodiment, and various modifications and changes may be made to those skilled in the art without departing from the essential characteristics of the embodiments. Therefore, the present embodiments are to be construed as illustrative rather than restrictive, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be construed according to the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

As described above, the present embodiment is applied to the traffic control field using the optimal network, and when the traffic download is performed according to the point of time when the resource utilization rate of the network is high or low, the location information of the WLAN network established by the communication service provider is used. It is a useful invention that generates the effect of adaptively transmitting traffic without affecting the traffic of the network by controlling the download state regardless of whether the cellular network is congested.

110: terminal
112: Traffic control application
120: network 130: policy providing apparatus
140: content providing device
310: signal generator
320: transmission order determining unit 330:
340 traffic requesting unit 350 traffic transmitting /
360: traffic control unit 362:
370: Policy request unit 380: Retry execution unit

Claims (10)

A signal generator for generating a traffic request signal;
A policy manager which transmits a policy request signal including transmitter identification information to a policy providing device and receives a policy response signal in response to the policy request signal;
A terminal network recognizer configured to recognize a network state of a cellular network based on the policy response signal;
A traffic transceiving unit which downloads a traffic response signal corresponding to the traffic request signal from a content providing device; And
The control unit performs the download through the recognized WLAN network, but controls to perform the download through the cellular network based on the network state when the download is out of coverage of the WLAN network.
And a second terminal. The method according to claim 1,
The traffic control unit includes:
When receiving a WLAN network access request signal from a device for securing mobility between heterogeneous networks during the downloading through the cellular network, performing turn-off on the cellular network and then turning on the WLAN network, and performing wireless The terminal characterized in that for performing the download over a LAN network regardless of the network state. 3. The method of claim 2,
The WLAN network access request signal is
And a search command for the WLAN network, a turn off command for the cellular network, and a turn on command for the WLAN network. The method according to claim 1,
The traffic control unit includes:
And searching for the WLAN network preferentially at the time of the first download, and if the WLAN network is not detected, performing the download through the cellular network based on the network state information. The method according to claim 1,
The traffic control unit includes:
And when the received signal strength for the WLAN network is less than a preset threshold, determining that the WLAN signal is out of coverage of the WLAN network. A communication unit for receiving a policy request signal including transmitter identification information from a terminal;
A determination unit determining whether a WLAN network is around the terminal based on the transmitter identification information;
A request unit controlling to transmit a WLAN network access request signal to the terminal through a device for securing mobility between heterogeneous networks when the WLAN network is around the terminal;
A network recognition unit for recognizing a network state of a cellular network;
A policy decision unit generating a policy response signal including a policy determined based on the network state; And
Policy transmitter for transmitting the policy response signal to the terminal
The policy providing apparatus comprising: The method according to claim 6,
Wherein,
Check the current location of the terminal using the transmitter identification information, and if the current location is within a predetermined range of the installation location of the preset carrier AP, it is determined that there is a WLAN network around the terminal. Policy provision device. The method according to claim 6,
The request unit,
When it is determined that there is a WLAN network around the terminal, the terminal control signal is transmitted to the inter-network mobility securing apparatus, so that the search command for the WLAN network and the turn on the cellular network are transmitted from the heterogeneous network mobility securing apparatus. And transmitting the WLAN network access request signal including at least one of an OFF command and a turn on command to the WLAN network, to the terminal. In the method for the terminal to control the traffic,
A signal generation process of generating a traffic request signal;
A policy management process of transmitting a policy request signal including transmitter identification information to a policy providing device and receiving a policy response signal in response to the policy request signal;
A terminal network recognition process of recognizing a network state of a cellular network based on the policy response signal;
A traffic transmission / reception process of downloading a traffic response signal corresponding to the traffic request signal from a content providing device; And
A traffic control process of performing the download through a recognized WLAN network and controlling the download to be performed through the cellular network based on the network state when the download is performed out of coverage of the WLAN network.
Traffic control method using an optimal network comprising a. In the method for the policy providing device to control the traffic,
A communication process of receiving a policy request signal including transmitter identification information from a terminal;
A determination process of determining whether there is a WLAN network around the terminal based on the transmitter identification information;
A request process of controlling to transmit a WLAN network access request signal to the terminal through a device for securing mobility between heterogeneous networks when the WLAN network is around the terminal;
A network recognition process of recognizing a network state of a cellular network;
A policy determination process of generating a policy response signal including a policy determined based on the network state; And
Policy transmission process of transmitting the policy response signal to the terminal
Traffic control method using an optimal network comprising a.

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