KR20060019450A - System and method for cellular mobile communication using heterogeneous wireless network - Google Patents

Abstract

According to an aspect of the present invention, there is provided an access point of a WLAN that provides radio resources using a dedicated WLAN frequency, a first device of a cellular network connected to an access point through a wired network, and establishing a first tunnel, Provides a cellular mobile communication system using a heterogeneous wireless network including a terminal for establishing a second tunnel with an access point using radio resources, and accessing a cellular network through a first tunnel and a second tunnel to perform call processing. .

According to the present invention, the cellular network can be connected to the cellular network using a radio resource of a radio network using a radio frequency other than the cellular frequency of the cellular mobile communication system, thereby enabling the cellular service network to be used without using a cellular service dedicated radio resource. The cellular service may be provided by accessing.

Cellular, WLAN, Access Point, BTS, BSC, Tunnel

Description

Cellular mobile communication system using heterogeneous wireless network and its method {SYSTEM AND METHOD FOR CELLULAR MOBILE COMMUNICATION USING HETEROGENEOUS WIRELESS NETWORK}             

1 is a network diagram of a cellular mobile communication system.

2 is a configuration diagram of a wireless LAN system.

3 is a block diagram of a cellular mobile communication system using a wireless LAN according to an embodiment of the present invention.

4 is a block diagram of a terminal according to an embodiment of the present invention.

5 is a block diagram illustrating a configuration of an access point according to an embodiment of the present invention.

6 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

7 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

8 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

9 is a flowchart illustrating a call processing procedure when an incoming call is received in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

10 is a flow diagram of a call processing procedure when originating in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

11 is a block diagram of a cellular mobile communication system using a heterogeneous wireless network according to another embodiment of the present invention.

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

13 is a block diagram illustrating an access point according to an embodiment of the present invention.

14 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

15 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

16 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

17 is a flowchart illustrating a call processing procedure when an incoming call is received in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

18 is a flow diagram of a call processing procedure when originating in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

1: Internet 2: Data Core Network (PDSN)

3: voice core network (MSC) 4: PSTN                 

5: BSC 6: BTS

7: cellular terminal 11: the Internet

12: gateway 13: router

14: wireless LAN (AP) 15: wireless LAN terminal

100: terminal 110: wireless LAN interface module

120: tunnel setting unit 130: call processing unit

140: cellular interface module 150: memory

200: access point 210: wireless LAN interface module

220: tunnel processing unit 230: call processing unit

240: IP network interface module 250: memory

300: eBSC 400: eBTS

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heterogeneous network. The present invention relates to a cellular service network by using a radio resource of a wireless network using a radio frequency other than the cellular frequency of a cellular mobile communication system to access a cellular service network without using a radio service dedicated radio resource. The present invention relates to a cellular mobile communication system using a heterogeneous wireless network and a method thereof.                         

Cellular mobile communication system is a concept proposed to overcome the limitations of service area and subscriber capacity. It is spatially frequency by dividing the service area into several small areas, that is, using the same frequency band in two cells far enough apart from each other. Make it reusable. Therefore, the mobile communication system increases the number of spatially distributed channels to secure sufficient subscribers.

1 is a network diagram of a cellular mobile communication system.

Referring to FIG. 1, a cellular mobile communication system includes a base station controller (BSC) 5, a base transceiver system (BTS) 6, and a cellular terminal 7.

The BTS 6 performs cross conversion between a wired signal and a wireless signal, covers one cell / sector area, and manages a plurality of terminals 7 included in the cell / sector area.

The BSC 5 performs a function of managing and controlling the BTSs 6. Specifically, it performs radio channel assignment and release functions for each cellular terminal 7, performs transmission output control functions of the cellular terminal 7 and the BTS 6, and performs soft handoff and hard handoff between cells. Determine, perform transcoding (16kbps kb 64kbps) and vocoding functions (13kbps, 8kbps), perform GPS (Global position system) clock distribution for handoff and signal processing, and operate for BTS (6) And perform maintenance functions.

The BSC 5 is connected to the PSTN 4 and is connected to the MSC 3 as a voice core network for performing voice communication, and the PDSN 2 is connected to the Internet 1 as a data core network for data communication. .

The MSC 3 performs a switching function for voice communication of the cellular mobile communication system, and the PDSN 2 performs a packet switching function for data communication of the cellular mobile communication system.

In the cellular mobile communication system, call processing between the cellular terminal 7 and the BTS 6 is divided into two types: call processing of the cellular terminal 7 and call processing of the BTS 6.

Call processing of the BTS 6 consists of pilot and synch channel processing, paging channel processing, access channel processing, and traffic channel processing. During pilot channel processing, the BTS 6 transmits a pilot signal on the pilot channel. During traffic channel processing, the BTS 6 communicates with the cellular terminal 7 in a mobile station control on the traffic channel state using forward and reverse traffic channels. During access channel processing, the BTS 6 monitors the access channel to receive messages sent by the cellular terminal 7 in system access. During paging channel processing, the BTS 6 transmits messages on the paging channel monitored by the terminal 7 in the access state of the cellular terminal 7 or in the idle state of the terminal 7.

The call processing of the cellular terminal 7 is performed by the initialization state of the terminal, the idle state of the cellular terminal, the system access state and the mobile station control on the traffic channel state. It consists of four terminal states. In the initialization state, the cellular terminal 7 selects and acquires a mobile communication system for communication. In the system access state, the cellular terminal 7 sends messages to the BTS 6 on the access channel and receives messages from the BTS 6 on the assigned paging channel. In the traffic state, the cellular terminal 7 communicates with the BTS 6 via forward and reverse channels.

Meanwhile, wireless LAN (WLAN) is a system designed to enable high-speed wireless data service based on Ethernet, and has been used as a useful network solution in factories, conference rooms, and exhibition halls where cabling is difficult.

A wireless LAN is not a cable like a wired LAN, but rather a wireless LAN. When the radio wave is adopted, the communication distance is longer than that of the infrared method, and there is no problem in data exchange even with a slight obstacle. The frequency used is 2.4 GHz, which is different from the frequency bands of wireless devices such as mobile phones and cordless phones. In addition, there is no need for a WLAN cable, so it is possible to use the network in the desired place.

2 is a configuration diagram of a WLAN system.

2, a wireless LAN terminal 15 equipped with a network interface card (NIC), an access point 14 of a wireless LAN that performs wireless communication using the wireless LAN terminal 15 and a wireless LAN frequency; And a router 13 for connecting the access point 14 to an external network, and a gateway 12 for connecting the access point 14 to the internet 11 through the router 13.                         

According to the definition of the WLAN MAC of IEEE 802.11, the access point 14 goes through a process of authentication and association to manage its wireless LAN service area.

That is, the access point 14 transmits call connection information, that is, IP, gateway, and DNS (Domain Name Server) information set in the WLAN terminal 15 from the corresponding terminal when the call connection request of the WLAN terminal 15 is performed. After receiving the request for authentication authentication to the gateway 12 through the router 13 performs a wireless LAN relay function so that the call connection is made.

At this time, the wireless LAN terminal 15 receives the authentication process for the call connection from the gateway 12 by inputting its registered member ID and password, if the access authentication of the gateway 12 is permitted The corresponding WLAN terminal 15 establishes a wireless link through the access point 14 to perform a call connection through the gateway 12.

As described above, the WLAN system and the cellular mobile communication system have evolved into separate systems as they perform services using frequencies of different bands.

However, as the general trend of communication technology is ubiquitous, there is a need for a technology for interworking between different heterogeneous communication networks. Accordingly, a need for a technology for interworking a wireless LAN system and a cellular mobile communication network has emerged. It became.

SUMMARY OF THE INVENTION The present invention has been made by such a necessity, a cellular mobile communication system using a heterogeneous wireless network to enable a cellular mobile communication service provided in a cellular mobile communication system in a wireless network environment other than a cellular dedicated frequency such as a wireless LAN and the like. The purpose is to provide a method.

According to an aspect of the present invention to achieve the above object, a first network for providing a radio resource using a first radio frequency band, and provides a radio resource using a cellular frequency band, and provides a first network and a wired network A second network connected to establish a first tunnel with the first network, and establishing a first network and a second tunnel by using a radio resource provided from the first network, and establishing a first network through the first tunnel and the second tunnel. The present invention provides a cellular mobile communication system using a heterogeneous wireless network including a terminal for accessing 2 networks and performing call processing.

According to another aspect of the present invention, an access point of a WLAN for providing a radio resource using a WLAN dedicated frequency, a first device of the cellular network connected to the access point through a wired network to establish a first tunnel, Cellular mobility using a heterogeneous wireless network including a terminal for establishing a second tunnel with the access point using a radio resource provided from the access point, and accessing the cellular network through the first tunnel and the second tunnel to perform call processing Provide a communication system.                     

According to another aspect of the present invention, a wireless LAN interface module for performing communication with a wireless LAN by allocating a wireless resource provided from the wireless LAN using a dedicated frequency band of the wireless LAN, and a wireless network configured with a cellular network and a first tunnel A tunnel processor configured to establish and manage a WLAN and a second tunnel by using a radio resource provided from the WLAN through a WLAN interface module; and a cellular network through the first tunnel and the second tunnel through a tunnel processor. The present invention provides a terminal for a cellular mobile communication system using a heterogeneous wireless network including a call processing unit for performing call processing.

According to another aspect of the present invention, a wireless LAN access point establishes a tunnel with a first device of a cellular network connected through a wired network, and a second tunnel with a terminal connected with a wireless LAN access point via a wireless link. And setting up and accessing the cellular network through a first tunnel and a second tunnel to perform a call processing procedure.

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

3 is a block diagram of a cellular mobile communication system using a wireless LAN according to an embodiment of the present invention.

Referring to FIG. 3, a communication system according to an embodiment of the present invention performs a wireless communication using a terminal 100 equipped with a WLAN network interface card, a wireless communication using the terminal 100 and a WLAN frequency, and the terminal 100. And the access point 200 to establish a tunnel, the switch or router 13 for connecting the access point 200 to the external network, and the access point 200 through the switch or router 13 to the Internet. The gateway 12 is connected to the gateway 12 through a wired network to establish a tunnel with the access point 200 through the wired network, and to provide cellular service to the terminal 100 through each set tunnel. And an enhanced BSC (hereinafter referred to as eBSC) 300.

Here, the terminal 100 is equipped with a wireless LAN interface module for processing a wireless signal of a wireless LAN frequency in the terminal 100 to establish a wireless link with the access point 200 through the wireless LAN frequency in the wireless LAN area. It performs wireless communication through the established wireless link and has a function of establishing a tunnel with the access point 200 and accessing the cellular network through the tunnel. Hereinafter, unless otherwise stated, a terminal means a terminal equipped with a WLAN interface module for establishing a wireless link with an access point through a WLAN frequency.

In this case, the terminal may be implemented in two types. A first implementation of a terminal is an implementation of a terminal having a WLAN interface module that establishes a wireless link using only a WLAN frequency.

The second embodiment of the terminal is an embodiment of the terminal equipped with not only the WLAN interface module but also a cellular radio interface module capable of processing radio signals of cellular frequency. In the case of the second terminal, since the wireless link may be configured using the WLAN frequency in the WLAN area and the wireless link may be configured using the cellular frequency in the cellular area, handover may be performed in the WLAN area and the cellular area. .                     

4 shows a second implementation of a terminal according to an embodiment of the present invention.

Referring to FIG. 4, the terminal 100 receives a radio resource provided from a WLAN using a WLAN dedicated frequency band to perform communication with the WLAN, and a WLAN interface module 110. Tunnel processing unit 120 to establish and manage the access point 200 and the tunnel using the radio resources provided from the wireless LAN through the; and the cellular network through the tunnel set through the tunnel processing unit 120 to call processing A call processing unit 130 for performing an operation, a cellular interface module 140 for allocating radio resources provided from a cellular network using a cellular dedicated frequency band to communicate with the cellular network, and a memory for storing tunnel setting information ( 150).

The access point 200 communicates with the terminal 100 by a carrier sense multiple access (CSMA / CA) scheme of IEEE 802.11.

5 is a block diagram illustrating an access point according to an embodiment of the present invention.

Referring to FIG. 5, the access point 200 allocates radio resources provided from a WLAN using a WLAN dedicated frequency band to establish a wireless link with the terminal 100 and an IP network. A wired network connected to the IP network interface module 240 for communicating with the terminal 100 and a tunnel with the terminal 100 through a wireless link established by the wireless LAN interface module 210, and connected by the IP network interface module 240. The tunnel processing unit 220 establishes a tunnel with the eBSC 300 and manages each of the set tunnels, and the terminal 100 connects to the eBSC 300 of the cellular network through each tunnel set through the tunnel processing unit 220. Call processing unit 230 for performing a call processing to access, and a memory 250 for storing the tunnel setting information.

The access point 200 and the terminal 100 first check whether there is a carrier according to the CSMA / CA protocol scheme, and transmit after a given time when there is no sender (that is, no terminal using a wireless channel). At this time, air, which is a transmission medium, uses the same Tx or Rx, so only one of the transmission (Tx) and the reception (Rx) is possible at a time.

In addition, if a collision occurs with another terminal during transmission, the next sender is determined by a back-off algorithm.

The eBSC 300 is connected to the PSTN 4 to the MSC 3, which is a voice core network for performing voice communication, and to the Internet 1, and to the PDSN 2, which is a data core network for data communication. . The MSC 3 performs a switching function for voice communication of the cellular mobile communication system, and the PDSN 2 performs a packet switching function for data communication of the cellular mobile communication system.

The eBSC 300 performs a service for the terminal 100 connected through a wireless LAN as well as a function of controlling base stations (not shown) managed by the eBSC 300.

That is, the eBSC 300 performs a radio channel allocation and release function for a cellular terminal (not shown) for a cellular terminal (not shown) that performs wireless communication through a cellular frequency band, and performs a cellular terminal (not shown). Transmit power control functions of BTS (not shown) and BTS (not shown), perform soft handoff between cells and determine hard handoff, and perform transcoding (16kbps ⇔ 64kbps) and vocoding functions (13kbps, 8kbps). It performs GPS (Global Position System) clock distribution for handoff and signal processing, and performs operation and maintenance for BTS (not shown).

In addition, the eBSC 300 performs a function of transmitting information transmitted from the terminal 100 to the MSC 3 or the PDSN 2 with respect to the terminal 100 connected through the tunnel in the WLAN area.

The terminal 100 performs an association procedure with the access point 200 using a beacon received from the access point 200, and receives an IP address from the gateway 12 through a method such as DHCP. After that, the terminal 100 establishes a tunnel using a tunneling scheme such as UDP to the access point 200.

A procedure for establishing a tunnel between the terminal 100 and the access point 200 will be described in more detail.

After the terminal 100 establishes an association process with the access point 200 of the WLAN, it attempts to establish a tunnel.

Tunnel setting may be manually inputted by the operator in the terminal 100 and the access point 200, or may be set automatically. Here, the process of automatic setting will be described in detail.

Various embodiments may be implemented according to a method for establishing a tunnel between the terminal 100 and the access point 200. Here, an embodiment using a MAC address, an embodiment using an IP address, and an embodiment using both an IP address and a UDP port number will be described.

6 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

An embodiment of establishing a tunnel using a MAC address between the terminal 100 and the access point 200 will be described with reference to FIG. 6.

The terminal 100 and the access point 200 may communicate with each other in the MAC layer without the help of another network. Therefore, the access point 200 and the terminal 100 can know each other's MAC address. When the terminal 100 and the access point 200 set the tunnel setup presence or not in advance, the tunnel is set to the respective MAC address without a separate message.

Otherwise, when the terminal 100 sends a tunnel connection establishment request to the access point 200, the access point 200 transmits a tunnel connection acceptance message to the terminal 100.

Subsequently, all traffic destined for the terminal 100 or the terminal 100 in which the tunnel is set in the access point 200 is transmitted to the tunnel with the eBSC 300.

On the other hand, although not shown in the drawing, one terminal 100 has two Mac addresses, one of which is specified to use the eBSC 300 and the tunnel, the other to specify the IP data network to use Can be.

In this case, the access 200 transmits the MAC address from the terminal 100 to the eBSC 300 through the tunnel if the MAC address is formed to form a tunnel for cellular service, and the MAC address designated for the IP data network. It can be transferred to an IP data network.

Next, an operation of establishing a tunnel between the access point 200 and the eBSC 300 will be described.

The operation of establishing the tunnel between the access point 200 and the eBSC 300 may be performed even when the access point 200 is powered on, and the terminal enters the wireless LAN area operated by the access point 200 and the terminal ( A request may be made to establish a tunnel between 100 and the access point 200.

Even if a tunnel already exists between the access point 200 and the eBSC 300, the tunnel may be additionally set according to the security level or the quality of service (QoS).

The message requesting the tunnel establishment is first transmitted by the access point 200 to the eBSC 300. There may be a variety of ways to which eBSC 300 to transmit. In addition, the access point 200 may query the DNS server using a DNS query to find the IP address of the eBSC 300.

After the IP address of the eBSC 300 is obtained, the type of tunneling protocol, the IP address of the access point, the port address or key value of the tunneling protocol, and the tunneling protocol parameters (security level or quality of service) are attached to the tunneling setup request message. send.

When the eBSC 300 responds, the message is transmitted with the success or failure of tunnel establishment, the port address or key value of the tunneling protocol, and the security level or service quality information granted by the eBSC 300.

Even after the tunnel is established, the tunnel setting value may be changed by the request of the access point 200 or the eBSC 300.

The process of establishing a tunnel from the access point 200 to the eBSC 300 will be described in more detail.

When using the UDP tunnel from the access point 200 to the eBSC 300, the access point 200 sends a message requesting the eBSC 300 to establish a tunnel using the IP address of the eBSC 300 stored therein. send.

The message may include an ID (IP address, MAC address, etc.) and a user ID (for example, a network access identifier (NAI) or an international mobile subscriber identity (IMSI)) of the access point 200, and the type of data (CS). signaling, CS data, PS signaling, PS data, and other information).

Receiving a message requesting the tunnel from the access point 200 eBSC (300) periodically transmits a message containing BSC-related information, such as Cell ID through the source port number of the corresponding access point (200). This completes the UDP tunnel between the access point 200 and the eBSC 300 and subsequently exchanges necessary information using this tunnel.

After the tunnel is completed, the access point 200 does not need to include the access point 200 ID and the user ID separately except in special cases. The eBSC 300 periodically transmits information indicating a Cell ID and other network conditions to the terminal 100 through the access point 200 in the form of other information.

Here, a multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBSC (300) whether the signaling / packet data / line data. For example, define a Mux header with a total size of 4 bytes, use 1 byte as an identifier for signaling / packet data / line data classification, and leave the rest as a reserved field for the future.

The terminal 100 periodically transmits a location registration message of the cellular service to the eBSC 300. If there is no data to be transmitted, the message must be delivered within a certain time to maintain the tunnel. If there is no tunnel maintenance message from the terminal 100, the eBSC 300 passes through the access point 200 to the terminal ( After sending a message requesting registration immediately 100, wait a certain time. For example, when transmitting a message requesting registration three times and not receiving a response, the eBSC 300 instructs the access point 200 to terminate the tunnel with the terminal 100.

If the terminal 100 does not receive periodic network information from the eBSC 300, the terminal 100 immediately waits for a predetermined time after transmitting a message requesting to send the network information. If there is no response after a certain time, the same operation is repeated again, for example, requesting to send network information three times. If no network information is received thereafter, the terminal 100 terminates the tunnel of the access point 200. Enter the procedure for establishing a new tunnel.

Existing BSC manages the BTS and performs functions such as allocating a radio channel to a terminal and controlling transmission output of a base station. The eBSC 300 leaves the WLAN resource to the WLAN access point 200 for a separate radio resource of the WLAN. Take no action.

7 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Here, the operation of establishing a tunnel between the access point 200 and the eBSC 300 is the same as described with reference to FIG. 6, and thus description thereof is omitted.

An embodiment of establishing a tunnel using an IP address between the terminal 100 and the access point 200 will be described with reference to FIG. 7.

The access point 200 may be connected to an IP network with an IP address, or may be a form of relaying traffic of the access point 200 to a router as a MAC bridge. Here, the description will apply to the case where the IP address is connected to the IP network.

In order to perform the tunnel setup using the IP address, the terminal 100 transmits a tunnel connection request message to the access point 200 together with the IP address of the terminal 100. The access point 200 attaches the IP address of the access point 200 and transmits a tunnel connection acceptance message to the terminal 100.

Afterwards, the terminal 100 can transmit cellular traffic to be transmitted to the cellular network and general IP data traffic to be transmitted through the WLAN to different IP addresses.

For example, a description will be given of a case where general IP data traffic to be transmitted through a WLAN network uses a first IP address, and cellular traffic to be transmitted to a cellular network uses a second IP address.

The IP packet transmitted from the terminal 100 to the access point 200 by making a header with the first IP address is transmitted to the WLAN network through the IP data network through the IP stack of the access point 200 itself.

On the other hand, the IP packet transmitted to the access point 200 by making a header with the second IP address in the terminal 100 is mapped to the tunnel interface between the access point 200 and the eBSC 300 by the tunneling setting and thus the cellular network. Is sent to.

At this time, a multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBSC 300 whether the signal is a signaling / packet data / line data. For example, define a Mux header with a total size of 4 bytes, use 1 byte as an identifier for signaling / packet data / line data classification, and leave the rest as a reserved field for the future.

8 is a diagram illustrating a protocol stack of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Here, the operation of establishing a tunnel between the access point 200 and the eBSC 300 is the same as described with reference to FIG. 6, and thus description thereof is omitted.

An embodiment of establishing a tunnel using an IP address and a UDP port number between the terminal 100 and the access point 200 will be described with reference to FIG. 8.

In order to perform tunnel setting between the terminal 100 and the access point 200 using the IP address and the UDP port number, the terminal 100 sets a range of the IP address of the terminal 100 and the UDP port number for which the tunnel setting is desired. In addition, the tunnel connection request is transmitted to the access point 200.

The access point 200 transmits the tunnel connection acceptance message to the terminal 100 by attaching the IP address of the access point 200 and the range of the UDP port number to which the tunnel is to be set.

After that, the terminal 100 can transmit cellular traffic and other IP data traffic by different UDP ports.

In the tunnel setup message, traffic having a UDP header composed of UDP port numbers other than those designated for tunneling purposes is transmitted from the access point 200 to the IP data network of the WLAN network through its IP stack.

Meanwhile, traffic in which a UDP header is configured with a UDP port number designated for tunneling in a tunnel setup message is mapped to a tunnel interface between the access point 200 and the eBSC 300 by the tunneling setup and transmitted to the cellular network. A multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBSC 300 whether the signal is a signaling / packet data / line data. For example, define a Mux header with a total size of 4 bytes, use 1 byte as an identifier for signaling / packet data / line data classification, and leave the rest as a reserved field for the future.

As described above, a procedure of performing a cellular service by a terminal in a wireless LAN region in a communication system configured through various embodiments will be described.

First, the connection between the eBSC 300 and the MSC 3 according to the present invention is the same as the connection between the conventional BSC and the MSC, and uses the format of the message exchanged between the BSC and the MSC for the call processing procedure.

That is, in the conventional case, when the MSC sends a channel assignment message to the BSC, the BSC issues a command to the BTS according to the channel assignment message and performs a procedure of allocating a radio channel to the terminal, and the BTS wirelessly When the channel is allocated, the BSC performs an assignment complete to inform the MSC that the radio channel allocation has been successfully performed.

As such, the channel assignment message, which has been conventionally exchanged for channel assignment between the MSC and the BSC, is also exchanged between the eBSC 300 and the MSC 3 according to the present invention. However, the channel assignment message to and from the eBSC 300 and the MSC 3 according to the present invention uses only the format of the channel assignment message that has been previously used, not a message for performing a command to allocate a radio channel as in the conventional case. Done. Therefore, the procedure of allocating a radio resource of the cellular network does not occur by sending and receiving a channel assignment message as in the conventional cellular network. This is because, in the present invention, the radio link uses radio resources allocated by the access point 200 of the WLAN.

Accordingly, the MSC 3 giving the channel assignment message to the eBSC 300 is merely a function for notifying that there is a call to the corresponding terminal, and the eBSC 300 sends a response message for the channel assignment message to the MSC ( Posting to 3) is only a function for notifying that the terminal has recognized the fact. Given this fact, let's take a look at the incoming process.                     

9 is a flowchart illustrating an incoming call processing procedure in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Referring to FIG. 9, upon receiving a paging request message from the MSC 3 (S41), the eBSC 300 transmits a paging request message to the access point 200 through the established tunnel (S42). The access point 200 transmits a message requesting a response to the terminal 100 through the established tunnel (S43), and when the terminal 100 responds with a paging response message (S44), the access point 200 sets The paging response message is transmitted to the eBSC 300 through the tunnel (S45). The eBSC 300 checks this response and then sends a paging response message to the MSC 3 (S46). The paging response message transmitted by the eBSC 300 includes information for requesting the eBSC 300 to establish a trunk channel with the MSC 3. The MSC 3 completes the trunk channel setup with the eBSC 300 while sending a channel assignment message (S47), and the eBSC 300 transmits a channel allocation completion message to the MSC 3 (S48).

Here, as the eBSC 300 shares trunk channel information with the MSC 3, the eBSC 300 adds information on a trunk channel that is not currently being used to a paging response message transmitted to the MSC 3. Accordingly, the MSC 3 recognizes the trunk channel information added to the paging response message uploaded from the eBSC 300 as it is, sets the trunk channel, and loads the trunk channel information on the channel assignment message given to the eBSC 300. To send.

Meanwhile, as another embodiment, the MSC 3 may set the trunk channel information set by the MSC 3 and set the trunk channel regardless of the trunk channel information added to the paging response message uploaded from the eBSC 300. It can also be sent as a channel assignment message. In this case, trunk channel information may not be included in the paging response message, and trunk channel information may be included only in the channel assignment message.

Next, the calling process will be described.

10 is a flowchart illustrating a call processing procedure when an outgoing call is made in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Referring to FIG. 10, the terminal 100 transmits an origination message to the access point 200 by using a preset tunnel. The access point 200 receiving the message transmits an Origination message to the eBSC 300 by using a tunnel set in advance (S52).

 The eBSC (300) receiving this message sends a CM service request message to the MSC (3) and requests a trunk channel establishment with the MSC (3).

The MSC 3 responds to the eBSC 300 with a channel assignment message to complete the trunk channel setup between the MSC 3 and the eBSC 300 (S54), and the eBSC 300 completes the channel assignment to the MSC 3 (S54). The message is transmitted (S55).

Here, as the eBSC 300 and the MSC 3 share trunk channel information, the eBSC 300 adds information on trunk channels that are not currently being used to the CM service request message transmitted to the MSC 3. . Accordingly, the MSC 3 recognizes trunk channel information added to the CM service request message uploaded from the eBSC 300, sets the trunk channel, and loads the trunk channel information on the channel assignment message to the eBSC 300. To send.

Meanwhile, as another embodiment, the MSC 3 may set the trunk channel information set by the MSC 3 and set the trunk channel regardless of the trunk channel information added to the CM service request message uploaded from the eBSC 300. It can also be sent in a channel assignment message given to 300). In this case, trunk channel information may not be included in the CM service request message, and trunk channel information may be included only in the channel assignment message.

Second Embodiment

11 is a configuration diagram of a cellular mobile communication system using a heterogeneous wireless network according to another embodiment of the present invention.

Referring to FIG. 11, in the cellular mobile communication system according to another embodiment of the present invention, a communication system according to an embodiment of the present invention includes a terminal 100 equipped with a WLAN network interface card, a terminal 100 and a wireless device. An access point 200 that performs wireless communication using a LAN frequency and establishes a tunnel with the terminal 100, a switch or router 13 for connecting the access point 200 to an external network, and a switch or router ( 13) and the gateway 12 connecting the access point 200 to the Internet through the wired network, and establishes a tunnel with the access point 200 through the wired network to establish a tunnel. It is configured to include an enhanced BTS (hereinafter referred to as eBTS) 400 for providing a cellular service to the terminal 100 through.

Here, the terminal 100 is equipped with a wireless LAN interface module for processing a wireless signal of the wireless LAN frequency in the terminal to establish a wireless link with the access point 200 through the wireless LAN frequency in the wireless LAN area and set the wireless Wireless communication is performed through a link, and a tunnel is established with the access point 200 to access a cellular network through the tunnel. Hereinafter, unless otherwise stated, a terminal means a terminal equipped with a WLAN interface module for establishing a wireless link with the access point 200 through a WLAN frequency.

In this case, the terminal 100 can be largely implemented in two forms. A first implementation of a terminal is an implementation of a terminal having a WLAN interface module that establishes a wireless link using only a WLAN frequency.

The second embodiment of the terminal 100 is an embodiment of the terminal equipped with not only the WLAN interface module but also a cellular radio interface module capable of processing radio signals of cellular frequency. In the case of the second terminal, since the wireless link may be set using the WLAN frequency in the WLAN area and the wireless link may be set using the cellular frequency in the cellular area, handover may be performed in the WLAN area and the cellular area. .

12 shows a second implementation of a terminal according to an embodiment of the present invention.

Referring to FIG. 12, the terminal 100 receives a radio resource provided from a WLAN using a WLAN dedicated frequency band to perform communication with the WLAN, and a WLAN interface module ( Tunnel processing unit 120 for establishing and managing the access point 200 and the tunnel using the radio resources provided from the wireless LAN through the 110, and eBTS (400) of the cellular network through the tunnel set through the tunnel processing unit 120 Call processing unit 130 for performing call processing, cellular interface module 140 for performing communication with the cellular network by allocating radio resources provided from the cellular network using a cellular dedicated frequency band, and establishing a tunnel And a memory 150 for storing information.

The access point 200 communicates with the terminal by CSMA / Carrier Sense Multiple Access (CSMA) of IEEE 802.11.

13 is a block diagram illustrating a configuration of an access point according to an embodiment of the present invention.

Referring to FIG. 13, the access point 200 allocates radio resources provided from a WLAN using a WLAN dedicated frequency band to establish a wireless link with the terminal 100 and an IP network. A wired network connected to the IP network interface module 220 and a terminal 100 through a wireless link established by the WLAN interface module 210 and communicating with the IP network interface module 220. Through the tunnel processor 230 to establish a tunnel with the eBTS 400 and to manage each of the set tunnels, and through each tunnel set through the tunnel processor 230 to the eBTS 400 of the cellular network It includes a call processing unit 240 for performing a call processing to access, and a memory 250 for storing tunnel setting information.

The access point 200 and the terminal 100 first check whether there is a carrier according to the CSMA / CA protocol method, and transmit after a given time when there is no sender (that is, no terminal using a wireless channel). . At this time, air, which is a transmission medium, uses the same Tx or Rx, so only one of the transmission (Tx) and the reception (Rx) is possible at a time.

In addition, if a collision occurs with another terminal during transmission, the next sender is determined by a back-off algorithm.

The eBTS 400 is connected to the BSC 5a, and the BSC 5a is connected to the PSTN 4, MSC 3, which is a voice core network for performing voice communication, and connected to the Internet 1 It is connected to PDSN 2, which is a data core network for communication. The MSC 3 performs a switching function for voice communication of the cellular mobile communication system, and the PDSN 2 performs a packet switching function for data communication of the cellular mobile communication system.

The eBTS 400 establishes and manages a wireless link using terminals (not shown) and cellular frequencies managed by the eBTS 400, and performs a service for the terminal 100 connected through the WLAN.

That is, the eBTS 400 performs a function of setting, maintaining, and releasing a radio link for a cellular terminal (not shown) for a cellular terminal (not shown) that performs wireless communication through a cellular frequency band.

In addition, the eBTS 400 transmits information transmitted from the terminal 100 to the MSC 3 or the PDSN 2 through the BSC 5a with respect to the terminal 100 connected through the tunnel in the WLAN area. Perform.

At this time, data and signaling transmission between the BSC 5a and the eBTS 400 is performed through a standard (for example, Abis) or an internal definition method (IPC: Inter Processor Communication) of each equipment company.

The BSC 5a recognizes the eBTS 400 as one of its sub-BTSs, creates information for the same cellular service, and delivers the information to the eBTS 400 using Abis or a separate IPC. The eBTS 400 receives this information and transmits the information using the preset tunnel with the terminal 200. Similarly, the eBTS 400 receives the information transmitted through the tunnel by the terminal 100 and transmits the information to the BSC 5a through Abis or a separate IPC.

The terminal 100 performs an association procedure with the access point 200 using a beacon received from the access point 200, and receives an IP address from the gateway 12 through a method such as DHCP. After that, the terminal 100 establishes a tunnel using a tunneling scheme such as UDP to the access point 200.

A procedure for establishing a tunnel between the terminal 100 and the access point 200 will be described in more detail.

After the terminal 100 establishes an association process with the access point 200 of the WLAN, it attempts to establish a tunnel.

Tunnel setting may be manually inputted by the operator in the terminal 100 and the access point 200, or may be set automatically. Here, the process of automatic setting will be described in detail.

Various embodiments may be implemented according to a method for establishing a tunnel between the terminal 100 and the access point 200. Here, an embodiment using a MAC address, an embodiment using an IP address, and an embodiment using both an IP address and a UDP port number will be described.

14 is a diagram illustrating a protocol stack of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

An embodiment of establishing a tunnel using a MAC address between the terminal 100 and the access point 200 will be described with reference to FIG. 14.

The terminal 100 and the access point 200 may communicate with each other in the MAC layer without the help of another network. Therefore, the access point 200 and the terminal 100 can know each other's MAC address. When the terminal 100 and the access point 200 set the tunnel setup presence or not in advance, the tunnel is set to the respective MAC address without a separate message.

Otherwise, when the terminal 100 sends a tunnel connection establishment request to the access point 200, the access point 200 transmits a tunnel connection acceptance message to the terminal 100.

Thereafter, all traffic destined for the terminal 100 or the terminal 100 in which the tunnel is set in the access point 200 is transmitted to the tunnel with the eBTS 400.

Here, a multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBTS 400 whether the signal is packet / packet data / line data. For example, a Mux header with a total size of 4 bytes is defined, 1 byte of which is used as an identifier for signaling / packet data / line data classification, and the remaining part is left as a reserved field for the future.

On the other hand, although not shown in the drawing, one terminal 100 has two Mac addresses, one of which is assigned to use the eBTS 400 and the tunnel, the other to specify the IP data network to use Can be.

In this case, the access 200 transmits to the eBTS 400 through the tunnel if the MAC address coming from the terminal 100 forms a tunnel for cellular service, and the MAC address designated for the IP data network. Can be sent over an IP data network.

Next, a process of establishing a tunnel between the access point 200 and the eBTS 400 will be described.

Data and signaling delivery standards (e.g. Abis) between the BSC 5a and the BTS, or through an internal definition method (IPC: Inter Prodessor Communication) of each equipment company.

The BSC 5a recognizes the eBTS 400 as one of its lower BTSs, creates information for the same cellular service, and delivers the information to the eBTS using Abis or a separate IPC.

The eBTS 400 receives this information and transmits the information using the preset tunnel with the terminal 100. Similarly, the eBTS 400 receives the information transmitted by the terminal 100 through the tunnel and transmits the information to the BSC 5a through Abis or a separate IPC.                     

After the tunnel is completed, the terminal 100 does not need to include the terminal ID and the user ID separately except in a special case. The BSC 5a periodically transmits other information to all the BTSs 5a and 5b indicative of the Cell ID and other network conditions, and the eBTS 400 receives this information and uses the tunnel to access the access point 200. Transfer to the terminal 100 through).

The terminal 100 periodically transmits a location registration message of the cellular service to the BSC 5a. If there is no data to be transmitted, the message must be delivered to the eBTS 400 within a certain time to maintain the tunnel. If there is no tunnel maintenance message from the terminal 100, the eBTS 400 sends a message to the terminal 100. Wait for some time after sending a message requesting registration. For example, if the message requesting registration is transmitted three times and no response is received, the eBTS 400 terminates the tunnel with the terminal 100 to the access point 200.

If the terminal 100 does not receive periodic network information from the eBTS 400, the terminal 100 waits for a predetermined time after transmitting a message requesting to send the network information. If there is no response after a certain time, the same operation is repeated again, for example, requesting to send network information three times in total, and after that, if no network information is received, the terminal 100 terminates the tunnel with the access point 200. And enter the procedure for establishing a new tunnel.

The existing BSC manages the BTS, allocates radio channels to the terminal, and controls the transmission output of the base station. In this case, the base station transmission output control from the BSC has no special meaning. It operates similarly to other BTSs 6a in order to be able to recognize the eBTS 400 like other BTSs 6a.

15 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Here, since the operation of establishing the tunnel between the access point 200 and the eBTS 400 is the same as described with reference to FIG. 14, description thereof is omitted.

An embodiment of establishing a tunnel using an IP address between the terminal 100 and the access point 200 will be described with reference to FIG. 15.

The access point 200 may be connected to an IP network with an IP address, or may be a form of relaying traffic of the access point 200 to a router as a MAC bridge. Here, the description will apply to the case where the IP address is connected to the IP network.

In order to perform the tunnel setup using the IP address, the terminal 100 transmits a tunnel connection request message to the access point 200 together with the IP address of the terminal 100. The access point 200 attaches the IP address of the access point 200 and transmits a tunnel connection acceptance message to the terminal 100.

Afterwards, the terminal 100 can transmit cellular traffic to be transmitted to the cellular network and general IP data traffic to be transmitted through the WLAN to different IP addresses.

For example, in case of general IP data traffic to be transmitted through a WLAN network, a first IP address is used, and in case of cellular traffic to be transmitted to a cellular network, a second IP address will be described.

The IP packet transmitted from the terminal 100 to the access point 200 by making a header with the first IP address is transmitted to the WLAN network through the IP data network through the IP stack of the access point 200 itself.

On the other hand, the IP packet transmitted to the access point 200 by making a header with the second IP address in the terminal 100 is mapped to the tunnel interface between the access point 200 and the eBTS 400 by the tunneling setting and thus, the cellular network. Is sent to. A multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBTS 400 whether the signal is packet / packet data / line data. For example, define a Mux header with a total size of 4 bytes, use 1 byte as an identifier for signaling / packet data / line data classification, and leave the rest as a reserved field for the future.

16 is a protocol stack structure diagram of a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Here, the operation of establishing a tunnel between the access point 200 and the eBTS 400 is the same as described with reference to FIG. 14, and thus description thereof is omitted.

An embodiment of establishing a tunnel using an IP address and a UDP port number together between the terminal 100 and the access point 200 will be described with reference to FIG. 16.

In order to perform tunnel setting between the terminal 100 and the access point 200 using the IP address and the UDP port number, the terminal 100 sets a range of the IP address of the terminal 100 and the UDP port number for which the tunnel setting is desired. In addition, the tunnel connection request is transmitted to the access point 200.

The access point 200 transmits the tunnel connection acceptance message to the terminal 100 by attaching the IP address of the access point 200 and the range of the UDP port number to which the tunnel is to be set.

After that, the terminal 100 can transmit cellular traffic and other IP data traffic by different UDP ports.

In the tunnel setup message, traffic having a UDP header composed of UDP port numbers other than those designated for tunneling purposes is transmitted from the access point 200 to the IP data network of the WLAN network through its IP stack.

Meanwhile, traffic in which a UDP header is configured with a UDP port number designated for tunneling in the tunnel setup message is mapped to a tunnel interface between the access point 200 and the eBTS 400 by the tunneling setup and transmitted to the cellular network. A multiplexing layer (Mux) is used to distinguish whether the information is transmitted between the terminal 100 and the eBTS 400 whether the signal is packet / packet data / line data. For example, define a Mux header with a total size of 4 bytes, use 1 byte as an identifier for signaling / packet data / line data classification, and leave the rest as a reserved field for the future.

In the communication system configured as described above, a procedure of performing a cellular service by a terminal in a wireless LAN region will be described.

First, the connection between the eBTS 400 and the BSC 5a and the MSC 3 in accordance with the present invention is the same as the connection between the conventional BTS 6b and the BSC 5b and the MSC 3 and is conventional for the call processing procedure. In this case, the format of the message exchanged between the BTS 6b, the BSC 5b, and the MSC 3 is used.

That is, in the conventional case, when the MSC 3 transmits a channel assignment message to the BSC 5b, the BSC 5b issues a command to the BTS 5b according to the channel assignment message to allocate a radio channel to the terminal. When the BTS 6b allocates a radio channel to the terminal, the BSC 5b performs a procedure for notifying the MSC 3 that the radio channel allocation has been successfully performed.

As described above, the channel assignment message previously exchanged for channel assignment between the BTS 6b, the BSC 5b, and the MSC 3 is also exchanged between the eBTS 400, the BSC 5a, and the MSC 3 according to the present invention. Receive. However, the channel assignment message exchanged to the eBTS 400, the BSC 5a, and the MSC 3 according to the present invention is not a message for performing a command for allocating a wireless channel as in the conventional case, but a channel assignment previously used. Only the format of the message will be used. Therefore, the procedure of allocating a radio resource of the cellular network does not occur by sending and receiving a channel assignment message as in the conventional cellular network. This is because, in the present invention, the radio link uses radio resources allocated from the WLAN.

Accordingly, the MSC 3 giving the channel assignment message to the eBTS 400 through the BSC 5a is merely a function of notifying that there is a call to the corresponding terminal, and the eBTS 400 is assigned to the channel assignment message. Posting a response message to the MSC (3) is only a function for notifying that the terminal has recognized the fact. Given this fact, let's take a look at the incoming process.

17 is a flowchart illustrating an incoming call processing procedure in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Referring to FIG. 17, when the BSC 5a receives a paging request message from the MSC 3 (S61), the BSC 5a transmits the paging request message to the eBTS 400, and the eBTS 400 accesses the access point 200 through the established tunnel. ) Transmits a paging request message (S63). The access point 200 transmits a paging request message to the terminal 100 through the established tunnel (S64).

When the terminal 100 responds to the access point 200 with a paging response message (S65), the access point 200 transmits the paging response message to the eBTS 400 through the established tunnel (S66). The eBTS 400 sends to the BSC 5a (S67). The BSC 5a checks this response and then sends a paging response message to the MSC 3 (S68). The paging response contains the information that the BSC requests to establish a trunk channel with the MSC. The MSC 3 completes the trunk channel establishment with the BSC 5a while sending a channel assignment message thereto (S69).

 The BSC 5a performs a channel allocation procedure according to a conventional call setup procedure (S70), and the eBTS 400 receives this message and prepares to deliver it to the existing tunnel with the terminal 100 using the circuit data Mux header. After finishing, the channel assignment confirmation message is sent to the BSC 5a. Upon receiving this, the BSC 5a transmits a channel assignment completion message to the MSC 3 (S71). After that, the MSC (3) completes the rest of the call procedure and receives and transmits the PCM voice signal to the BSC (5a) using TDM. The BSC 5a converts this voice information into EVRC and loads it in Abis to the eBTS 400. The eBTS 400 exchanges this voice signal with the terminal 100 using the line data Mux header.

Let's take a look at the origination process by taking CDMA2000 as an example.

18 is a flowchart illustrating a call processing procedure when originating in a cellular mobile communication system using a heterogeneous wireless network according to an embodiment of the present invention.

Referring to FIG. 18, the terminal 100 transmits an origination message to the access point 200 by using a preset tunnel. Upon receiving this message, the access point 200 transmits an Origination message to the eBTS 400 by using a preset tunnel (S82). The eBTS 400, which has received this message, transmits this message through the Abis to the BSC 5a. Transfer to (S83). Upon receiving this message, the BSC 5a sends a CM service request message to the MSC 3 to request channel allocation with the MSC 3 (S84). The MSC 3 responds to the BSC 5a with a channel assignment message (S85) to complete the channel setup between the MSC 3 and the BSC 5a, and the BSC 5a sends a channel assignment message to the eBTS 400. Send (S86).

 After the eBTS 400 is ready to transmit the voice signal through the tunnel using the circuit data Mux header according to the conventional call setup procedure, the CDMA air channel is allocated as required by the BSC 5a through the Abis. Announce it as if it were done. However, as mentioned above, the radio resources of the WLAN are allocated by the WLAN rather than the CDMA air channel. Upon receiving this message, the BSC 5a transmits a channel assignment completion message to the MSC 3 (S87). The MSC 3 then completes the rest of the call procedure and sends and receives a PCM voice signal to and from the BSC 5a via TDM. The BSC 5a converts this voice signal into an EVRC form and exchanges it with the eBTS 400 through Abis. The eBTS 400 exchanges the EVRC type voice information with the terminal 100 using the UDP port set through the above procedure.

In the above-described embodiment, the embodiment using the MAC address, the embodiment using the IP address, and the IP address and the UDP port number together in the method for establishing a tunnel between the terminal 100 and the access point 200. An example has been described.

In addition, although not described in the above embodiment, when establishing a tunnel between the terminal and the access point, it is also possible to establish a tunnel using the UDP, GRE, GTP protocol.

In addition, the above embodiment has described a cellular mobile communication system using a heterogeneous wireless network that performs a cellular service using a wireless resource of a wireless LAN, but is applied to perform a cellular service using a wireless resource of Bluetooth in addition to the wireless LAN. It is possible.

In addition, in the above embodiments, the tunnel is set up using UDP when the tunnel is set up with the access point, the eBSC, and when the access point is set up with the eBTS. However, as shown in the figure, the tunnel can also be set using GRE or GTP.

 According to the present invention, since a cellular service can be provided to a terminal equipped with a wireless LAN interface in the wireless LAN service area, when the wireless LAN interface is mounted on a terminal that can use a cellular frequency band, a wireless service dedicated wireless resource A cellular service can be provided by accessing a cellular service network using a wireless resource dedicated to a WLAN service without using a wireless LAN service.

In addition, as the WLAN system can be interworked with the cellular mobile communication system, the possibility of various communication services can be proposed. For example, being able to access a cellular service network using a wireless resource dedicated to a WLAN service and providing a cellular service may provide an opportunity for the wireless LAN subscribers to attract customers as a business customer in connection with billing problems. Can also be.

Claims (24)

A first network for providing radio resources using a first radio frequency band; A second network providing a radio resource using a cellular frequency band and connected to the first network through a wired network to establish a first tunnel with the first network; A terminal configured to establish a second tunnel with the first network by using a radio resource provided from the first network, and access the second network through the first tunnel and the second tunnel to perform call processing; Cellular mobile communication system using heterogeneous wireless network. 2. The cellular mobile communication system according to claim 1, wherein the first network includes an access point for establishing a wireless link with the terminal to establish the second tunnel. 2. The cellular mobile communication system according to claim 1, wherein the second network includes a base station (BTS) for establishing the first tunnel through the wired network with the first network. 2. The cellular mobile communication system according to claim 1, wherein the second network includes a base station controller (BSC) for establishing the first tunnel through the wired network with the first network. The cellular mobile communication system of claim 1, wherein the first network comprises at least one of wireless LAN and Bluetooth. The cellular mobile communication system of claim 1, wherein the first network and the second network establish the first tunnel using one of UDP, GRE, and GTP protocols. An access point of a wireless LAN providing wireless resources using a wireless LAN dedicated frequency, A first device of a cellular network connected to the access point via a wired network to establish a first tunnel; A heterogeneous wireless network including a terminal for establishing a second tunnel with the access point using a radio resource provided from the access point, and accessing a cellular network through the first tunnel and the second tunnel to perform call processing. Used cellular mobile communication system. 8. The cellular mobile communication system according to claim 7, wherein the first apparatus of the cellular network includes a base station (BTS) for establishing the first tunnel through a wired network with the access point. 8. The cellular mobile communication system according to claim 7, wherein the first apparatus of the cellular network includes a base station controller (BSC) for establishing the first tunnel through the wired network with the access point. 8. The cellular mobile communication system according to claim 7, wherein the first device and the access point of the cellular network establish the first tunnel using one of UDP, GRE, and GTP protocols. The method of claim 7, wherein Cellular mobile communication system using a heterogeneous wireless network for establishing a tunnel using the MAC address between the terminal and the access point. The method of claim 7, wherein Cellular mobile communication system using a heterogeneous wireless network for establishing a tunnel using the IP address between the terminal and the access point. The method of claim 7, wherein Cellular mobile communication system using a heterogeneous wireless network for establishing a tunnel between the terminal and the access point using an IP address and a UDP port number. The method of claim 7, wherein the terminal and the first device of the cellular network, Cellular mobile communication system using a heterogeneous wireless network using a multiplex layer (Mux) header to distinguish whether the information transmitted between the terminal and the first device of the cellular network signaling / packet data / line data. A wireless LAN interface module for performing communication with the wireless LAN by allocating a wireless resource provided from the wireless LAN by using a wireless LAN dedicated frequency band; A tunnel processing unit configured to establish and manage a WLAN and a second tunnel using a radio resource provided from the WLAN through the WLAN interface module with respect to a WLAN that has established a cellular network and a first tunnel; A terminal for a cellular mobile communication system using a heterogeneous wireless network comprising a call processing unit for performing a call processing by accessing a cellular network through the tunnel and the first tunnel and the second tunnel. The method of claim 15, A terminal for a cellular mobile communication system using a heterogeneous radio network further comprising a cellular interface module for performing communication with the cellular network by allocating radio resources provided from the cellular network using a cellular dedicated frequency band. The method of claim 15, The tunnel processing unit is a terminal for a cellular mobile communication system using a heterogeneous wireless network for establishing the wireless LAN and the second tunnel using one of UDP, GRE, GTP protocol. Establishing a tunnel with an access point of a WLAN with a first device of a cellular network connected through a wired network; Establishing a second tunnel with a terminal connected to the wireless LAN through an access point of the wireless LAN; And the terminal accessing the cellular network through the first tunnel and the second tunnel and performing a call processing procedure. 19. The method of claim 18, wherein the first apparatus of the cellular network comprises a base station (BTS) for establishing the first tunnel via a wired network with the access point. 19. The method of claim 18, wherein the first device of the cellular network comprises a base station control device (BSC) that establishes the first tunnel via the wired network with the access point. 19. The method of claim 18, wherein establishing the second tunnel comprises: Cellular mobile communication method using a heterogeneous wireless network for establishing a tunnel between the terminal and the access point using a MAC address. 19. The method of claim 18, wherein establishing the second tunnel comprises: Cellular mobile communication method using a heterogeneous wireless network for establishing a tunnel between the terminal and the access point using an IP address. 19. The method of claim 18, wherein establishing the second tunnel comprises: Cellular mobile communication method using a heterogeneous wireless network for establishing a tunnel between the terminal and the access point using an IP address and a UDP port number. 19. The method of claim 18, wherein the terminal and the first device of the cellular network, Cellular mobile communication method using a heterogeneous wireless network using a multiplex layer (Mux) header to distinguish whether the information transmitted between the terminal and the first device of the cellular network signaling / packet data / line data.

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