KR100854623B1 - Method and Apparatus for Switching Wired and Wireless LAN about Connecting Operation - Google Patents

Abstract

According to the present invention, when only one of the wired LAN and the wireless LAN is connected, the network is connected to the connected LAN. When the two LANs are connected at the same time, the present invention operates only as the wired LAN having a high transmission speed, thereby preventing unnecessary wireless LANs from operating. As a method and apparatus for preventing simultaneous operation of a wired / wireless LAN, when there is a connection request from a wired LAN network, or when a connection request or reception of LAN data is simultaneously received from a wired LAN network and a wireless LAN network, the network controller 150 connects the LINK_LED through the GPIO port. The # = 0 signal is transmitted to the LAN PHY Chip of the CPU 110, and the CPU 110 disables the wireless LAN regardless of whether the wireless LAN network is connected. In addition, when there is no connection request from the wired LAN network and there is a connection request or reception of LAN data from the wireless LAN network, the network controller 150 transmits a LINK_LED # = 1 signal to the LAN PHY Chip through the GPIO port. The CPU 110 may enable the wireless LAN controller 160 and disable the network controller 150 that manages the wired LAN.

Wired LAN, Wireless LAN, Concurrent Operation, Access Point, AP, Network, Communication

Description

Method and apparatus for preventing simultaneous operation of wired and wireless LANs {Method and Apparatus for Switching Wired and Wireless LAN about Connecting Operation}             

1 is an example of an apparatus for explaining a method for preventing simultaneous operation of a wired or wireless LAN according to a preferred embodiment of the present invention.

2 is a view showing the configuration of the CPU 110 and the network controller 150 for checking whether the connection to the wired LAN network;

3 is a flowchart illustrating a method for preventing simultaneous operation of a wired or wireless LAN according to an exemplary embodiment of the present invention.

※ Explanation of codes for main parts of drawing

100: access point (AP) 110: CPU

120: RAM 130: Flash ROM

140: switch 150: network controller

160: wireless LAN controller 170: antenna

The present invention relates to a method and apparatus for preventing simultaneous operation of wired and wireless LAN, and more particularly, when only one of the wired LAN and the wireless LAN is connected, the network is connected to the connected LAN, and when the two LANs are connected at the same time, the wired transmission speed is high. The present invention relates to a method and apparatus for preventing simultaneous operation of a wired / wireless LAN by operating only in a LAN to prevent unnecessary wireless LANs from operating.

In recent years, with the development of wireless communication technology, an access point having a wireless LAN interface and a wired LAN interface in order to maintain connection compatibility with a wireless LAN terminal having a wireless communication function and a device connected to the wired LAN terminal (Access Point In many cases, a wireless base station device referred to as an " AP "

The access point (AP) functions as a bridge between the wireless LAN terminal and the wired LAN terminal, enabling data transmission and reception with each other. In addition, when communicating with other wireless LAN terminals, it is possible to perform wireless communication via an access point called an infrastructure mode. When performing communication between such radio communication devices, the 2.4 GHz band (2.4000 to 2.4835 GHz) is divided into 14 channels (the use channel is limited depending on the country).

The AP has an interface for setting a wireless LAN such as group identification information (ID) and a wireless communication channel between an access point and a station, and it is necessary to set an ID and a channel used for communication in advance. Although the setting of this AP varies depending on the device, it is common to perform the setting from terminal software, a dedicated tool, a web browser, or the like using a network interface.

When the station MS communicates via the AP, the station MS is set to the infrastructure mode. The station receives a signal (hereinafter, referred to as Beacon) periodically transmitted by the AP while changing a wired LAN channel or a wireless LAN channel, and transmits a connection request including ID information to the AP of the channel that has received the beacon. If the AP that has received the connection request is the same as the ID set in the AP, the AP determines that the connection is possible and returns a connection response, thereby establishing communication between the AP and the station.

However, when the wired LAN is connected while the wireless LAN is connected, two LANs are connected at the same time so that either the wireless LAN or the wired LAN is operated. On the contrary, when the wireless LAN is connected while the wired LAN is connected, the wireless LAN operates as a wired LAN. That is, when two LANs are connected at the same time, not only the speed is lowered, but also there is a problem in not knowing which LAN is connected to the network.

The present invention for solving the above problems, when only one of the wired LAN or wireless LAN is connected to the network by the connected LAN, when both LANs are connected at the same time to operate only a wired LAN with a high transmission speed, unnecessary wireless It is an object of the present invention to provide a method and apparatus for preventing simultaneous operation of a wired / wireless LAN to prevent a LAN from operating.

In order to achieve the above object, the present invention provides a device for preventing simultaneous operation of wired LAN (LAN) and wireless LAN (LAN) communication, connected to a wired network for the wired LAN communication, connected from the wired network A network controller for transmitting a wireless LAN start signal (LINK_LED # = 1) and transmitting a wired LAN start signal (LINK_LED # = 0) when there is a connection for receiving a connection request signal or LAN data from the wired network; A wireless LAN controller for controlling packetization, modulation, and encryption of data transmitted and received with the wireless network; And upon receiving the wired LAN initiation signal from the network controller, enable the network controller and disable the WLAN controller, and when receiving the WLAN initiation signal, It provides a device for preventing simultaneous operation of a wired or wireless LAN, characterized in that it comprises a control unit (CPU) to enable and disable the network controller.

In addition, according to another object of the present invention, a method for preventing simultaneous operation of wired LAN (LAN) communication and wireless LAN (LAN) communication, the first step of performing the initialization for the wired LAN communication and the wireless LAN communication step; A second step of allocating a channel necessary for the wired LAN communication and the wireless LAN communication; A third step of determining whether a wired LAN start signal (LINK_LED # = 0) is received to determine whether there is a connection of a wired LAN network for the wired LAN communication; A fourth step of executing the wired LAN communication upon receiving the wired LAN start signal; And receiving a wireless LAN start signal (LINK_LED # = 1) when there is no connection with the wired LAN network, and performing the wireless LAN communication. 5. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is an example of an apparatus for explaining a method for preventing simultaneous operation of a wired or wireless LAN according to a preferred embodiment of the present invention.

The AP 100 for describing an embodiment of the present invention includes a CPU 110, a RAM 120, a flash ROM 130, a switch 140, a network controller 150, a wireless LAN controller 160, and an antenna ( 170).                     

The CPU 110 reads a control program loaded on the RAM 120 to control the network controller 150 and the wireless LAN controller 160.

The RAM 120 stores a program for controlling the operation of the AP 100 or is used as a temporary storage area of communication packets transmitted and received between the network controller 150 and the wireless LAN controller 160.

The flash ROM 130 stores system setting values of a control program or an access point loaded on the RAM 120.

The switch 140 is used to indicate, by user input, to start searching for a wired or wireless free channel.

The network controller 150 controls transmission and reception of communication packets transmitted and received between the wired network and the wireless network. For example, the network controller 150 is an Ethernet controller.

The wireless LAN controller 160 controls packetization, modulation and demodulation and encryption of data transmitted and received between the wireless communication device and the AP 100.

The antenna 170 is used for receiving data from the wireless LAN station and transmitting data to the wireless LAN station.

2 is a diagram showing the configuration of the CPU 110 and the network controller 150 for checking whether the connection to the wired LAN network.

The network controller 150 connected to the wired LAN network includes a PHY chip and an RJ-45 connector that performs an Ethernet PHY (physical layer) function. The PHY Chip is provided with a LINK_LED connection port for informing the CPU 110 whether LAN data is received from the wired LAN network.

The CPU 110 is composed of an ICH4-M chip and the like and has a GPIO port to receive a signal (LINK_LED #) indicating whether there is a connection request signal or LAN data from the network controller 150 through the GPIO port. do.

That is, the AP 100 configured as described above connects the AP 100 to, for example, a wired LAN network of an office that is a mobile destination, and sets a channel used for the AP 100, such that the network controller 150 and the wireless LAN controller ( The initialization process 160 is executed. Then, if there is a connection request from the wired LAN network, or if there is a connection request from the wired LAN network and the wireless LAN network at the same time, the network controller 150 sends a LINK_LED # = 0 signal through the GPIO port to the CPU 110. The CPU 110 transfers the LAN PHY chip to the LAN PHY chip, and disables the wireless LAN regardless of whether the wireless LAN network is connected. In addition, when there is no connection request from the wired LAN network and there is a connection request or reception of LAN data from the wireless LAN network, the network controller 150 transmits a LINK_LED # = 1 signal to the LAN PHY Chip through the GPIO port. The CPU 110 enables the wireless LAN controller 160 and disables the network controller 150 that manages the wired LAN.

Next, a method of preventing simultaneous operation of a wired or wireless LAN according to a preferred embodiment of the present invention will be described with reference to the flowchart shown in FIG. 3.

First, when the AP 100 is operated, the CPU 110 loads the control program from the flash ROM 130 into the RAM 120 to start the program. Subsequently, the CPU 110 executes initialization processing of the network controller 150 and the wireless LAN controller 160 (S202). Subsequently, the setting values of the system stored in the flash ROM 130 are read in advance, and the AP 100 is initialized.

After the initialization, when the switch 140 is pressed by the user, the CPU 110 executes automatic setting of the wireless LAN channel according to the key input command of the switch 140.

First, the CPU 110 sets the AP 100 to a station mode that operates in the same manner as a wireless LAN terminal such as a notebook computer to start wireless communication. In other words, the CPU 110 is configured to operate as a wireless LAN terminal (station) instead of a wireless LAN AP in order to detect another wireless LAN AP or wireless communication terminal. Next, the CPU 110 sets the wireless LAN channel used for communication as the station mode to the initial channel value. Here, for example, using the IEEE802.11b method, the 2.4GHz band is divided into 14 channels (Korea, Japan, etc.), and the occupied band of each channel is 22 ± 11 MHz from the center frequency of each channel. Since it is MHz, the first channel of the 14 channels is set here, and a '1' is set in the wireless LAN channel counter.

After the establishment of the wireless LAN channel, the CPU 110 starts to operate in the station mode and is in a standby state for receiving a beacon BEACON transmitted from a wireless access point existing around (S304).

In the standby state, the CPU 110 monitors whether a connection request signal is received from the wired LAN network or there is transmission of LAN data through the GPIO port (S306).

When the connection request signal is received from the wired LAN network through the network controller 150 or the LAN data is transmitted, thereby connecting to the wired LAN network (S308), the network controller 150 connects to the wired LAN network through the RJ-45 connector. Receive a connection request signal or LAN data from, and transmits a LINK_LED # = 0 signal to the GPIO port of the CPU 110 through the LINK_LED port.

The CPU 110 receives a LINK_LED # = 0 signal from the network controller 150 through the GPIO port (S310), and disables the wireless LAN controller 160 (S312).

On the other hand, the network controller 150 is connected to the wired LAN network through the RJ-45 connector, there is no connection request signal or LAN data received through the RJ-45 connector, if there is no connection with the wired LAN network (S308) The LINK_LED # = 1 signal is transmitted to the GPIO port of the CPU 110 through the LINK_LED port.

Accordingly, the CPU 110 configured with the ICH4-M chip receives the LINK_LED # = 1 signal from the network controller 150 through the GPIO port (S314).

When the CPU 110 receives the LINK_LED # = 1 signal from the network controller 150, the CPU 110 enables the wireless LAN controller 160 (S316).

Thereafter, with the wireless LAN controller 160 enabled, the CPU 110 checks whether a channel that has not been checked for a channel still exists, and if the channel remains, sets the wireless LAN channel counter by '1'. It is determined whether or not to receive a beacon on the newly set wireless channel. Subsequently, if there is no beacon received within the unit time, the CPU 110 determines that the current channel is an empty channel and allocates the current channel as a channel to be used by the AP 100. The CPU 110 changes the AP 100 to the access point mode in order to operate as a wireless LAN AP, and then starts an operation of communicating with the wireless LAN station in the access point mode.

According to an embodiment of the present invention, when only one of the wired LAN and the wireless LAN is connected, the network is connected to the connected LAN, and when the two LANs are connected at the same time, only the wired LAN having a high transmission speed is operated so that unnecessary wireless LAN is operated. A method and apparatus for preventing simultaneous operation of wired and wireless LANs can be realized.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, when the wireless LAN and the wired LAN are connected at the same time, since only the wired LAN operates at a higher speed, unnecessary operation of the wireless LAN can be prevented.

When wired and wireless LANs are connected at the same time, it prevents the overall network from slowing down and eliminates the uncertainty of which way to operate.

Claims (10)

A device for preventing simultaneous operation of wired LAN (LAN) communication and wireless LAN (LAN) communication, When connected to a wired network for the wired LAN communication, and there is no connection from the wired network, if there is a connection that transmits a wireless LAN start signal (LINK_LED # = 1) and receives a connection request signal or LAN data from the wired network. A network controller for transmitting a wired LAN start signal (LINK_LED # = 0); A wireless LAN controller for controlling packetization, modulation, and encryption of data transmitted and received with the wireless network; And When the wired LAN start signal is received from the network controller, the network controller is enabled and the wireless LAN controller is disabled. When the wired LAN start signal is received, the wireless LAN controller is enabled. And a control unit (CPU) for activating and disabling the network controller. The method of claim 1, The network controller controls the transmission and reception of communication packets transmitted and received between the wired network and the wireless network, and simultaneously configures a PHY chip and an RJ-45 connector to perform an Ethernet PHY (physical layer) function. Motion prevention device. The method of claim 2, And a connection port (LINK_LED) for indicating whether or not the LAN data is received from the wired network. The method of claim 2, The network controller is an Ethernet controller (Ethernet controller) characterized in that the simultaneous operation of the wired or wireless LAN. The method of claim 1, The controller (CPU) is configured to include an ICH4-M chip, and the device for preventing simultaneous operation of a wired or wireless LAN, characterized in that it comprises a GPIO port for receiving the wired LAN start signal or the wireless LAN start signal. As a method of preventing simultaneous operation of wired LAN (LAN) communication and wireless LAN (LAN) communication, A first step of performing initialization for the wired LAN communication and the wireless LAN communication; A second step of allocating a channel necessary for the wired LAN communication and the wireless LAN communication; A third step of determining whether a wired LAN start signal (LINK_LED # = 0) is received to determine whether there is a connection of a wired LAN network for the wired LAN communication; A fourth step of executing the wired LAN communication upon receiving the wired LAN start signal; And And receiving a wireless LAN start signal (LINK_LED # = 1) when there is no connection with the wired LAN network, and performing the wireless LAN communication. The method of claim 6, In the third step, the connection of the wired LAN network is a method of preventing simultaneous operation of a wired / wireless LAN, characterized in that the connection request signal from the wired LAN network through a network controller is received or there is a transmission of LAN data. The method of claim 6, The wired LAN start signal or the wireless LAN start signal is received via a GPIO port from a network controller that controls the wired LAN communication. The method of claim 6 or 8, In the third step, upon receiving the wired LAN start signal, enabling the network controller and disabling the wireless LAN controller for controlling the wireless LAN communication. How to prevent operation. The method of claim 8, In the third step, when the wireless LAN start signal is received, enabling the wireless LAN controller and disables the network controller.

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