KR101466852B1 - Method and apparatus for transmitting packets in a wireless communication system - Google Patents

Abstract

The present invention relates to a packet transmission method and apparatus for a terminal in a wireless communication system, and more particularly, to a packet transmission method for maintaining a connection between a cellular network and a Wi-Fi network and transmitting packets through one of a cellular network and a Wi- A method and an apparatus are disclosed.
According to an embodiment of the present invention, there is provided a method of transmitting a packet to a cellular network and a terminal capable of accessing a WiFi network, the method comprising: connecting a terminal connected to a cellular network to a Wi-Fi network; Maintaining a connection to the cellular network and mapping source-based routing based on an IP address of the cellular network; If the source address included in the packet is the same as the IP address, transmitting the packet through the cellular network; And transmitting the packet through the Wi-Fi network when the source address included in the packet is different from the IP address.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a packet transmission method for a terminal in a wireless communication system,

The present invention relates to a packet transmission method and apparatus for a terminal in a wireless communication system, and more particularly, to a packet transmission method for maintaining a connection between a cellular network and a Wi-Fi network and transmitting packets through one of a cellular network and a Wi- And more particularly,

Recently, according to the development of electronic engineering and communication engineering, mobile communication terminals have various functions. That is, as the wireless communication and data processing technologies are developed, the terminal can perform functions such as voice communication as well as internet connection.

In addition, mobile communication infrastructure (infra) has been continuously developed and various types of mobile communication networks have existed recently. For example, there is a cellular network based on a cell managed by a base station, and a WiFi network using a wireless access point having a relatively small coverage.

Conventionally, when a terminal connected to a cellular network accesses a Wi-Fi network, the connection with the cellular network is terminated and all existing sessions are disconnected.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packet transmission method of a terminal and a device therefor in a wireless communication system.

It is another object of the present invention to provide a method and apparatus for maintaining a connection between a cellular network and a Wi-Fi network, and for transmitting packets to one of a cellular network and a Wi-Fi network through source-based routing.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. Lt; / RTI >

According to an aspect of the present invention, there is provided a method of transmitting a packet through a cellular network and a terminal capable of accessing a WIFI network, the method comprising: connecting a terminal connected to a cellular network to a Wi-Fi network; Maintaining a connection to the cellular network and mapping source-based routing based on an IP address of the cellular network; If the source address included in the packet is the same as the IP address, transmitting the packet through the cellular network; And transmitting the packet through the Wi-Fi network when the source address included in the packet is different from the IP address.

The packet may include an IP address of the cellular network when the terminal is created by a session before connecting to the Wi-Fi network.

The packet may include an address different from an IP address of the cellular network when the terminal is created by a session after connecting to the Wi-Fi network.

The mapping step may include changing a default entry of the routing table to a gateway address of the Wi-Fi network.

The mapping step may include changing a domain name system (DNS) address to an address of the Wi-Fi network.

The method may further comprise terminating the connection of the cellular network.

The method may further comprise unmapping the source-based routing.

The method comprising: determining whether to unmap the source-based routing; And transmitting the packet through the Wi-Fi network when the mapping of the source-based routing is released.

A terminal connectable to a cellular network and a Wi-Fi network according to another embodiment of the present invention includes a transmission module; Receiving module; And a processor for controlling the terminal including the transmitting module and the receiving module, wherein the processor is configured to allow a terminal connected to a cellular network to access a Wi-Fi network, maintain a connection to the cellular network, And if the source address included in the packet is the same as the IP address, the packet is transmitted through the cellular network. If the source address included in the packet is different from the IP address, And to transmit the packet through the Wi-Fi network.

The processor may be configured to change a default entry of a routing table to a gateway address of the WiFi network.

The processor may be configured to change a domain name system (DNS) address to an address of the Wi-Fi network.

The processor may be configured to terminate the connection of the cellular network.

The processor may be configured to de-map the source-based routing.

The packet may include an IP address of the cellular network when the terminal is created by a session before connecting to the Wi-Fi network.

The packet may include an address different from an IP address of the cellular network when the terminal is created by a session after connecting to the Wi-Fi network.

The processor may be configured to determine whether to de-map the source-based routing and to forward the packet over the Wi-Fi network if the mapping of the source-based routing is released.

According to another aspect of the present invention, there is provided a computer-readable recording medium having recorded thereon a packet transmission method including: instructions for a terminal connected to a cellular network to connect to a Wi-Fi network; Maintaining a connection to the cellular network and mapping source-based routing based on an IP address of the cellular network; Instructions for transmitting the packet over the cellular network if the source address included in the packet is the same as the IP address; And a command for transmitting the packet through the Wi-Fi network when the source address included in the packet is different from the IP address.

The packet may include an IP address of the cellular network when the terminal is created by a session before connecting to the Wi-Fi network.

The packet may include an address different from an IP address of the cellular network when the terminal is created by a session after connecting to the Wi-Fi network.

The recording medium may include an instruction to change a default entry of a routing table to a gateway address of the Wi-Fi network.

The mapping command may include an instruction to change a domain name system (DNS) address to an address of the Wi-Fi network.

The recording medium may further comprise instructions for terminating the connection of the cellular network.

The recording medium may further comprise instructions for unmapping the source-based routing.

The recording medium further comprising: instructions for determining whether to unmap the source-based routing; And if the mapping of the source-based routing is released, transmitting the packet through the Wi-Fi network.

The foregoing general description and the following detailed description of the invention are illustrative and are for further explanation of the claimed invention.

According to each embodiment of the present invention as described above, it is possible to provide a packet transmission method of a terminal and a device therefor in a wireless communication system.

Further, according to each embodiment of the present invention, it is possible to provide a method and apparatus for maintaining a connection between a cellular network and a Wi-Fi network and transmitting a packet to one of a cellular network and a Wi-Fi network through source-based routing.

Further, according to each embodiment of the present invention, even if the terminal connected to the cellular network is connected to the Wi-Fi network, the connection of the cellular network can be maintained, thereby improving user convenience.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a flowchart illustrating an example of a feedback method for transmitting voice data according to the present invention.
2 is a flow chart illustrating an example of determining a mapping of source-based routing.
3 is a block diagram illustrating a terminal according to an embodiment of the present invention.

Embodiments of the present invention provide a packet transmission method and apparatus of a terminal in a wireless communication system. The following embodiments are a combination of elements and features of the present invention in a predetermined form. Each component or characteristic may be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. In addition, some of the elements and / or features may be combined to form an embodiment of the present invention. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments.

In the description of the drawings, there is no description of procedures or steps that may obscure the gist of the present invention, nor is any description of steps or steps that can be understood by those skilled in the art.

Embodiments of the present invention have been described herein with respect to packet transmission and reception in a wireless communication system including a base station of a cellular network and a wireless access point of a WiFi network. Herein, the base station is a terminal node of a network that directly communicates with the terminal. The specific operation described herein as performed by the base station may be performed by an upper node of the base station, as the case may be.

That is, various operations performed for communication with a terminal in a network consisting of a plurality of network nodes including a base station can be performed by a base station or other network nodes other than the base station. At this time, the 'base station' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), and an advanced base station (ABS).

In addition, in the present invention, a terminal refers to a terminal that is a subject of a packet transmission method in a wireless communication system according to the present invention, and may be referred to simply as a device. Also, the terminal may be a mobile station (MS), a user equipment (UE), a subscriber station (SS), a mobile subscriber station (MSS), a mobile terminal, Terminal or a device.

Embodiments of the present invention may be supported by standard documents disclosed in at least one of IEEE 802 systems, 3GPP systems, 3GPP LTE and LTE-Advanced (LTE-Advanced) systems, and 3GPP2 systems, which are wireless communication systems. That is, the self-explanatory steps or parts of the embodiments of the present invention which are not described in order to clearly illustrate the technical idea of the present invention can be supported by the documents. In addition, all terms disclosed in this document may be described by the standard document.

The following description is to be understood as illustrative and non-limiting, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access And can be used in various wireless communication systems. CDMA may be implemented in radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. The TDMA may be implemented in a wireless technology such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE). OFDMA may be implemented in wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and Evolved UTRA (E-UTRA). UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) using E-UTRA, adopting OFDMA in downlink and SC-FDMA in uplink. LTE-A (Advanced) is the evolution of 3GPP LTE.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following detailed description, together with the accompanying drawings, is intended to illustrate exemplary embodiments of the invention and is not intended to represent the only embodiments in which the invention may be practiced.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same parts are denoted by the same reference numerals throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

In addition, the specific terms used in the embodiments of the present invention are provided to facilitate understanding of the present invention, and the use of such specific terms can be changed to other forms without departing from the technical idea of the present invention .

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating an example of a feedback method for transmitting voice data according to the present invention.

Referring to FIG. 1, a terminal connected to a cellular network accesses a Wi-Fi network (S101).

A cellular network refers to a network in which communication is performed through a direct link between a base station and a terminal within a cell covered by the base station.

Specifically, cellular communication using a cellular network is one of mobile communication systems, and is a communication system that divides an entire service area into a plurality of narrow regions. In mobile communication, since the available frequency band is limited, the number of channels that can be used at one time is limited. In cellular communication, a wide service area is divided into a plurality of narrow service area cells, and the intensity of the radio wave radiated from the antenna is adjusted so that the radio wave reaches only within the cell area. A base station is located at the center of each cell area, and communication is performed while changing the base station when the cell area is crossed. The cellular communication method is complicated in control, but has advantages in that it can obtain a larger number of channels as a whole because the same frequency can be repeatedly used in a remote area. In addition, since cells can be subdivided into smaller cells, they can flexibly respond to increasing demand.

A Wi-Fi network refers to a local area network (LAN) capable of performing communication within a certain distance around a location where an access point (AP) is installed.

Specifically, the Wi-Fi network refers to a network supporting IEEE 802.11 based wireless LAN connection. Wi-Fi communication using a Wi-Fi network is a communication method between a wireless access device functioning to transmit data to the Internet and a terminal such as a smart phone. The terminal can perform communication with the wireless access device using the wireless LAN card. Wi-Fi can be called a short-range wireless network or a local area network.

Generally, the service area of the cellular network is a wide area and therefore includes the service area of the Wi-Fi network. Also, since accessing a Wi-Fi network often has advantages in terms of cost and speed, when the terminal moves to a service area of the Wi-Fi network, it attempts to access the Wi-Fi network.

Next, the terminal maintains the connection of the cellular network and maps the source-based routing based on the IP address of the cellular network (S103).

Conventionally, when a terminal connected to a cellular network moves to a service area of a Wi-Fi network, the connection of the cellular network is terminated and a session of an application communicating through the cellular network is terminated.

According to the present invention, even if the terminal is connected to a Wi-Fi network, the connection of the cellular network can be maintained to improve user convenience. For example, the video being played may play seamlessly and the login of the website being logged in may be maintained.

In addition, the terminal can maintain a session prior to accessing the Wi-Fi network by mapping the source-based routing based on the IP address of the cellular network.

Source-based routing refers to a method of determining the route of a packet using a source address contained in a data packet.

Specifically, when a packet is generated by a session before the terminal connects to the Wi-Fi network, the packet may include the IP address of the cellular network. On the other hand, if a packet is generated by a session after the terminal accesses the Wi-Fi network, the packet may include an IP address different from the IP address of the cellular network.

Step S103 may include changing a default entry of the routing table to a gateway address of the Wi-Fi network.

In addition, the step S103 may include changing a domain name system (DNS) address to an address of the Wi-Fi network.

By changing the gateway address and the DNS address to the address of the Wi-Fi network, the packet can include a different IP address than the IP address of the cellular network, or if the IP address does not exist, the packet can be transmitted over the Wi-Fi network.

Next, if the source address included in the packet is the same as the IP address of the cellular network, the terminal transmits the packet through the cellular network (S105).

That is, according to the source-based routing mapped in step S103, if the source address included in the packet is the same as the IP address of the cellular network, the terminal transmits the packet through the cellular network.

For example, when an application communicates over a cellular network before the terminal connects to the Wi-Fi network, the data packet according to the application may be transmitted over the cellular network.

Next, if the source address included in the packet is different from the IP address of the cellular network, the terminal transmits the packet through the Wi-Fi network (S107).

That is, if the source address included in the packet is different from the IP address of the cellular network, the terminal does not apply the source-based routing rule, and thus transmits the packet through the Wi-Fi network according to the basic routing rule.

For example, when an application communicates through a Wi-Fi network after the terminal has connected to the Wi-Fi network, the data packet according to the application can be transmitted over the Wi-Fi network.

Meanwhile, the terminal may further include a step of releasing the mapping of the source-based routing (not shown).

For example, if the session retention time for the cellular network has elapsed, the terminal may release the mapping of the source-based routing to allow the packet to be transmitted only over the Wi-Fi network.

2 is a flow chart illustrating an example of determining a mapping of source-based routing.

Referring to FIG. 2, the UE determines whether the mapping of the source-based routing is released (S201).

If it is determined that the mapping of the source-based routing is released, the terminal transmits the packet through the Wi-Fi network.

On the other hand, if the mapping of the source-based routing is not released, the terminal transmits the packet to one of the Wi-Fi network and the cellular network based on the source address included in the packet (S203).

Specifically, if the source address included in the packet is the same as the IP address of the cellular network, the terminal transmits the packet through the cellular network (S205). If the source address included in the packet is different from the IP address of the cellular network, (S207).

Meanwhile, the terminal can terminate the connection of the cellular network without releasing the mapping of the source-based routing (not shown).

In this case, the terminal can transmit the data packet only through the Wi-Fi network.

3 is a block diagram illustrating a terminal 300 according to an embodiment of the present invention.

3, the terminal 300 according to an exemplary embodiment of the present invention may include a transmission module 301, a reception module 303, a memory 305, and a processor 307. The transmission module 301 can transmit various signals, data and information to an external device or a terminal. The receiving module 303 can receive various signals, data and information from an external device or a terminal. The processor 307 can control the operation of the entire terminal 300.

The terminal 300 according to an embodiment of the present invention may be configured as follows.

The processor 307 of the terminal 300 may be configured to connect to the Wi-Fi network while connected to the cellular network.

A cellular network refers to a network in which communication is performed through a direct link between a base station and a terminal within a cell covered by the base station.

A Wi-Fi network refers to a local area network (LAN) capable of performing communication within a certain distance around a location where an access point (AP) is installed.

Generally, the service area of the cellular network is a wide area and therefore includes the service area of the Wi-Fi network. Also, since accessing a Wi-Fi network often has advantages in terms of cost and speed, when the terminal moves to a service area of the Wi-Fi network, it attempts to access the Wi-Fi network.

In addition, the processor 307 of the terminal 300 may be configured to maintain the connection of the cellular network and to map the source-based routing based on the IP address of the cellular network.

Conventionally, when a terminal connected to a cellular network moves to a service area of a Wi-Fi network, the connection of the cellular network is terminated and a session of an application communicating through the cellular network is terminated.

According to the present invention, even if a terminal is connected to a Wi-Fi network, the connection of the cellular network can be maintained to improve user convenience. For example, the video being played may play seamlessly and the login of the website being logged in may be maintained.

The processor 307 of the terminal 300 may be configured to maintain a session prior to accessing the Wi-Fi network by mapping the source-based routing based on the IP address of the cellular network.

Source-based routing refers to a method of determining the route of a packet using a source address contained in a data packet.

Specifically, when a packet is generated by a session before the terminal connects to the Wi-Fi network, the packet may include the IP address of the cellular network. On the other hand, if a packet is generated by a session after the terminal accesses the Wi-Fi network, the packet may include an IP address different from the IP address of the cellular network.

In addition, the processor 307 of the terminal 300 may be configured to transmit a packet through the cellular network if the source address included in the packet is the same as the IP address of the cellular network.

That is, according to the source-based routing, the processor 307 of the terminal 300 can be configured to transmit packets over the cellular network if the source address included in the packet is the same as the IP address of the cellular network.

For example, when an application communicates over a cellular network before the terminal connects to the Wi-Fi network, the data packet according to the application may be transmitted over the cellular network.

In addition, the processor 307 of the terminal 300 may be configured to transmit a packet through the Wi-Fi network when the source address included in the packet is different from the IP address of the cellular network.

That is, if the source address included in the packet is different from the IP address of the cellular network, the terminal does not apply the source-based routing rule, and thus transmits the packet through the Wi-Fi network according to the basic routing rule.

For example, when an application communicates through a Wi-Fi network after the terminal has connected to the Wi-Fi network, the data packet according to the application can be transmitted over the Wi-Fi network.

In addition, the processor 307 of the terminal 300 may be configured to de-map the source-based routing.

For example, if the session retention time for the cellular network has elapsed, the processor 307 of the terminal 300 may be configured to release the mapping of the source-based routing to transmit packets only through the Wi-Fi network.

Further, the processor 307 of the terminal 300 may be configured to determine whether the mapping of the source-based routing is released.

If it is determined that the mapping of the source-based routing is released, the terminal transmits the packet through the Wi-Fi network.

On the other hand, if the mapping of the source-based routing is not released, the processor 307 of the terminal 300 may be configured to transmit the packet to one of the Wi-Fi network and the cellular network based on the source address included in the packet.

Specifically, the processor 307 of the terminal 300 transmits a packet through the cellular network if the source address included in the packet is the same as the IP address of the cellular network. If the source address included in the packet is the IP address of the cellular network And may be configured to transmit packets over the Wi-Fi network.

On the other hand, the processor 307 of the terminal 300 may be configured to terminate the connection of the cellular network without releasing the mapping of the source-based routing.

In this case, the terminal can transmit the data packet only through the Wi-Fi network.

In addition, the processor 307 may be configured to implement the procedures and / or methods suggested by the present invention.

The embodiments described above are those in which the elements and features of the present invention are combined in a predetermined form. Each component or feature shall be considered optional unless otherwise expressly stated. Each component or feature may be implemented in a form that is not combined with other components or features. It is also possible to construct embodiments of the present invention by combining some of the elements and / or features. The order of the operations described in the embodiments of the present invention may be changed. Some configurations or features of certain embodiments may be included in other embodiments, or may be replaced with corresponding configurations or features of other embodiments. It is clear that the claims that are not expressly cited in the claims may be combined to form an embodiment or be included in a new claim by an amendment after the application.

Embodiments in accordance with the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof. In the case of hardware implementation, an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs) field programmable gate arrays, processors, controllers, microcontrollers, microprocessors, and the like.

In the case of an implementation by firmware or software, an embodiment of the present invention may be implemented in the form of a module, a procedure, a function, or the like which performs the functions or operations described above. The software code can be stored in memory and driven by the processor. The memory is located inside or outside the processor and can exchange data with the processor by various means already known.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the foregoing detailed description is to be considered in all respects illustrative and not restrictive. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

300: terminal
301: Transmission module
303: Receiving module
305: Memory
307: Processor

Claims (24)

A packet transmission method of a terminal capable of connecting to a cellular network and a Wi-Fi network,
Connecting a terminal connected to a cellular network to a Wi-Fi network;
If the source based routing mapping is based on an IP address of the cellular network and the source address of the packet is the same as the IP address of the cellular network, the terminal transmitting the packet over the cellular network;
If the source based routing mapping is based on an IP address of the cellular network and the source address of the packet is different from the IP address of the cellular network, the terminal transmits the packet through the Wi-Fi network; And
And if the source-based routing mapping is not based on an IP address of the cellular network, the terminal transmits the packet through the Wi-Fi network,
Wherein the network to which the packet is transmitted is determined by whether the source based routing mapping is based on the IP address of the cellular network and whether the source address of the packet is the same as the IP address of the cellular network. The method according to claim 1,
Wherein the packet comprises an IP address of the cellular network when the terminal is created by a session prior to accessing the Wi-Fi network. The method according to claim 1,
Wherein the packet includes an address different from an IP address of the cellular network when the terminal is created by a session after the terminal has accessed the Wi-Fi network. The method according to claim 1,
Wherein the mapping step includes changing a default entry of a routing table to a gateway address of the WiFi network. The method according to claim 1,
Wherein the mapping step includes changing a domain name system (DNS) address to an address of the Wi-Fi network. The method according to claim 1,
Further comprising the step of disconnecting the cellular network. The method according to claim 1,
Further comprising releasing the mapping of the source-based routing. 8. The method of claim 7,
Determining whether to unmap the source-based routing; And
And if the mapping of the source-based routing is released, transmitting the packet over the Wi-Fi network. 1. A terminal connectable to a cellular network and a Wi-Fi network,
The terminal
Transmission module;
Receiving module; And
And a processor for controlling the terminal including the transmission module and the reception module,
The processor
When a terminal that is connected to a cellular network connects to a Wi-Fi network,
If the source based routing mapping is based on an IP address of the cellular network and the source address of the packet is the same as the IP address of the cellular network, the terminal transmits the packet through the cellular network,
Wherein if the source-based routing mapping is based on an IP address of the cellular network and the source address of the packet is different from the IP address of the cellular network, the terminal transmits the packet via the Wi-
Wherein the terminal is configured to transmit the packet over the Wi-Fi network if the source-based routing mapping based on the IP address of the cellular network does not exist,
Wherein the network to which the packet is transmitted is determined according to whether the source based routing mapping is based on the IP address of the cellular network and whether the source address of the packet is the same as the IP address of the cellular network. 10. The method of claim 9,
Wherein the processor is configured to change a default entry of a routing table to a gateway address of the Wi-Fi network. 10. The method of claim 9,
Wherein the processor is configured to change a domain name system (DNS) address to an address of the Wi-Fi network. 10. The method of claim 9,
Wherein the processor is configured to disconnect the cellular network. 10. The method of claim 9,
Wherein the processor is configured to de-map the source-based routing. 10. The method of claim 9,
Wherein the packet comprises an IP address of the cellular network when the terminal is created by a session prior to accessing the Wi-Fi network. 10. The method of claim 9,
Wherein the packet comprises an address different from an IP address of the cellular network when generated by a session after the terminal has connected to the Wi-Fi network. 16. The method of claim 15,
Wherein the processor determines whether to unmap the source-based routing,
And to forward the packet over the Wi-Fi network if the mapping of the source-based routing is released. Instructions for a terminal connected to a cellular network to connect to a Wi-Fi network;
Instructions for transmitting the packet over the cellular network if a source based routing mapping based on an IP address of the cellular network exists and the source address of the packet is the same as the IP address of the cellular network;
Wherein if the source-based routing mapping is based on an IP address of the cellular network and the source address of the packet is different from the IP address of the cellular network, the terminal transmits an instruction for transmitting the packet through the Wi- ; And
And if the source-based routing mapping is not based on an IP address of the cellular network, transmitting the packet through the Wi-Fi network,
Wherein the network to which the packet is transmitted is determined according to whether the source based routing mapping is based on the IP address of the cellular network and whether the source address of the packet is the same as the IP address of the cellular network Recorded on a recording medium. 18. The method of claim 17,
Wherein the packet includes an IP address of the cellular network when the terminal is created by a session before the terminal is connected to the Wi-Fi network. 18. The method of claim 17,
Wherein the packet includes an address different from an IP address of the cellular network when the terminal is created by a session after the terminal has accessed the Wi-Fi network. 18. The method of claim 17,
Wherein the command for mapping includes a command for changing a default entry of a routing table to a gateway address of the Wi-Fi network. 18. The method of claim 17,
Wherein the instructions for mapping include instructions for changing a domain name system (DNS) address to an address of the WiFi network. 18. The method of claim 17,
Further comprising instructions for disconnecting the cellular network. ≪ Desc / Clms Page number 24 > 18. The method of claim 17,
Further comprising instructions for unmapping the source-based routing. ≪ Desc / Clms Page number 24 > 24. The method of claim 23,
Determining whether to unmap the source-based routing; And
Further comprising instructions for transmitting the packet over the Wi-Fi network when the mapping of the source-based routing is released. ≪ Desc / Clms Page number 19 >

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