KR101259833B1 - Method of relaying wireless multi-mode radio communication by object sensing, and apparatus thereof - Google Patents

Abstract

The present invention relates to a multi-mode wireless communication relay method and apparatus using an object recognition function. The wireless communication relay method of the present invention comprises the steps of: identifying a wireless environment of a terminal by an object recognition function; determining whether to provide a predetermined communication relay service to the terminal; and determining an operation network to provide a predetermined communication relay service. It includes a step. According to the present invention, there is an advantage in that it is possible to connect universally to various types of wireless networks regardless of a specific wireless access method.

Description

METHOD OF RELAYING WIRELESS MULTI-MODE RADIO COMMUNICATION BY OBJECT SENSING, AND APPARATUS THEREOF}

The present invention relates to a multi-mode wireless communication relay method and apparatus, and more particularly to a multi-mode wireless communication relay method and apparatus by the object recognition function.

In general, wireless communication systems have been developed to provide voice and data services while securing mobility to users. The wireless communication system has been developed and commercialized in various forms due to the rapid development of technology. The wireless communication systems developed and commercialized or commercialized as described above are described as mobile communication systems, WLAN (Wireless LAN) systems, Bluetooth systems, Zigbee systems, and WiFi (Wireless Fidelity) systems. , WiBro (Wireless Broadband) system, satellite communication system, broadcast communication system, telematics system, etc.

Such wireless communication systems have different protocols and frequency bands according to respective service communication protocols, and have respective characteristics. Therefore, a terminal subscribing to a specific service may receive a service only from a service system to which it is subscribed, and when entering another service system, the service may not be provided if the roaming service is not provided. In addition, different service systems may use different frequency bands or communication protocols. As described above, when communication protocols and frequency bands used in different systems are different, the requirements for the terminal to provide roaming services are increased. This may not only provide a cheap terminal but also has a problem in miniaturization and light weight of the terminal. In addition, when a terminal subscribed to a specific service is located in the service shadow area or out of the service area, or when the channel environment between the terminal and the wireless base station is poor, the user cannot provide a service of a desired quality.

On the other hand, in the case of a specific wireless communication system, the use efficiency of resources may decrease when compared to other wireless communication systems. In other words, very few resources are used in some systems in the same region, and only a small amount of resources may be used in other systems. In this case, there is a problem that a smooth service is difficult to be achieved in a system lacking resources.

An object of the present invention is to provide a multi-mode wireless communication relaying method and apparatus that allows a legacy access method of a legacy terminal as it is, and enables selective access to a wireless network diversified by mode conversion or the like. .

Another object of the present invention is to provide a wireless communication relay method and apparatus capable of recognizing a channel environment that is constantly changing in a time or frequency domain and providing an optimal communication quality.

Another object of the present invention is to provide a wireless communication relay method and apparatus capable of solving a problem in a cell boundary of a wireless communication system or an area where a wireless communication service of a specific mode is not provided.

It is another object of the present invention to provide a wireless communication relay method and apparatus that meets the needs of an adaptive wireless communication service for optimal use of radio resources.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

In order to achieve the above object, the present invention provides a communication relay method of a communication relay device in a multimode wireless environment, the method comprising: identifying a wireless access environment of a terminal by an object recognition function, and providing a predetermined communication relay service to a terminal; And determining an operation network to provide a predetermined communication relay service.

In addition, the present invention is a communication relay method of a communication relay device in a multi-mode wireless environment, the step of recognizing two or more terminals using the same mode by the object recognition function, searching for a network corresponding to the same mode as the mode of the two or more terminals And providing a predetermined communication relay service to two or more terminals using the search result.

In addition, the present invention provides a communication relay apparatus in a multi-mode wireless environment, comprising: a recognition unit for identifying a wireless connection environment of a terminal by an object recognition function, a determination unit for determining whether to provide a predetermined communication relay service to a terminal, and a predetermined Another aspect of the present invention includes a control unit for determining an operation network to provide a communication relay service.

In addition, the present invention is a communication relay device in a multi-mode wireless environment, the recognition unit for recognizing two or more terminals using the same mode by the object recognition function, a network for searching the network corresponding to the same mode as the mode of the two or more terminals Another aspect of the present invention includes a search unit and a controller for providing a predetermined communication relay service to the two or more terminals by using a search result.

According to the present invention as described above, there is an advantage that can be selectively connected to a wireless network diversified by a mode conversion or the like by accepting the original connection method of the legacy terminal as it is.

In addition, according to the present invention, there is an advantage in that it is possible to recognize an ever-changing channel environment in the time or frequency domain and provide an optimum communication quality.

In addition, according to the present invention, there is an advantage that can solve the problem in the cell boundary of the wireless communication system or the area where the wireless communication service of a specific mode is not provided.

In addition, according to the present invention, there is an advantage that can meet the needs of the adaptive wireless communication service for the optimal use of radio resources.

1 is a system conceptual diagram for implementing AAA in a wireless communication system according to the present invention.
2 is a block diagram showing a configuration of a communication relay apparatus according to an embodiment of the present invention.
3 is a block diagram showing a configuration of a communication relay device according to another embodiment of the present invention.
4 is a view for explaining a communication relay service providing method according to an embodiment of the present invention.
5 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.
6 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.
7 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.
8 is a flowchart illustrating a flow of a communication relay method according to an embodiment of the present invention.
9 is a flowchart illustrating a flow of a communication relay method according to another embodiment of the present invention.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

The present invention recognizes a connection state and a network environment of a legacy terminal in a multi-mode wireless environment, accepts the mode as it is regardless of the wireless access method (mode) of the terminal, and uses a method such as mode conversion. A wireless communication relay method and apparatus for providing a high quality communication service by connecting to a wireless network having an optimal channel environment.

First, the concept and main functions used in the present invention will be described.

(1) AAA (Accommodate Any-mode Anywhere) refers to a network system that can operate in any mode, anywhere. The present invention, in the implementation of AAA, is fundamental to construct a virtual united wireless network (Virtual United Wireless Network) for realizing a multi-mode connection to different heterogeneous terminals or commercial networks while maintaining their own connection mode or operation mechanism intact It is a concept.

(2) Universal Wireless Channel Access (UWA) is a wireless environment in which heterogeneous networks are mixed, and accepts the terminal of the network as it is, regardless of the mode of each network. The present invention refers to a multi-mode wireless access method that provides an optimal or desired quality wireless environment among current wireless environments while maintaining the connection mode or operation mechanism. Optimizing channel usage efficiency such as frequency through mode reconfiguration and mode switching, or by recognizing dormant wireless channels in the current wireless environment and using, moving, and merging dormant channels. It is a way to realize a virtual converged wireless network to provide.

(3) Reconfigurable Access Station (RAS) is a core system for UWA, and is a gateway to a switch or virtual converged wireless network between heterogeneous wireless networks providing multi-mode wireless access to a terminal. It can be said. RAS has a wireless environment awareness function and cooperative communication function with heterogeneous networks or other systems, and provides a mode reconfiguration, network switching, and relay connection to a terminal in a heterogeneous network. Provide access services. In addition, dormant channel sensing and channel switching functions for a closed virtual group network configuration, channel aggregation and channel leasing for co-existence between heterogeneous modes There is a function.

RAS corresponds to one embodiment of a communication relay device implemented by the present invention. Hereinafter, the function and role of RAS will be described in more detail.

(4) Object Sensing is an essential concept of the present invention, and means a concept of operation in which a legacy terminal is passively recognized by a certain device or the like. That is, as in the conventional technology, a terminal capable of supporting multimode recognizes an environment in which heterogeneous wireless networks are mixed, and selects a mode capable of providing optimal service, and requests a base station to change modes. Rather than providing an integrated service with a base station in a manner, regardless of whether a legacy terminal can support a multi-mode, a concept of providing a service to allow communication using a homogeneous or heterogeneous network by accepting a mode and a connection method of a terminal as it is. to be. Therefore, in order to realize the wireless multi-mode connection according to the present invention, the RAS excludes the behavior of the terminal itself, and relays the terminal to the selective network by its mode reconfiguration and conversion function.

In the present invention, the object recognition function by the RAS includes two basic operations. First, the legacy terminal is connected to the network in the native mode. The RAS recognizes that the quality of service of the network to which the terminal is currently connected is vulnerable for some reason, such as severe fading in a wireless environment or weak signal strength around the cell. This operation includes a passive scanning operation in which the RAS detects an electrical signal from the terminal. Second, the legacy terminal does not find a network that supports its use mode. This may be the case if a particular mode of infrastructure is not installed in a particular region. This operation includes an active scanning operation, such as sending a search beacon for the RAS to actively find a terminal in a service request state.

Hereinafter, a communication relay method and apparatus according to the present invention will be described in detail with reference to specific embodiments.

1 is a system conceptual diagram for implementing AAA in a wireless communication system according to the present invention.

The virtual combined wireless network, i.e., the virtual converged wireless network 110, is a state in which various modes of wireless networks 102, 104, 106, and 108 are recognized through RAS 112, which is a communication relay device implemented by the present invention. Means that it is virtually coupled. Each of the terminals 114, 116, and 118 is a terminal subscribed to at least one wireless network. The terminals 114, 116, and 118 may not only access the wireless network to which they have subscribed in a unique connection mode, but may also connect to the heterogeneous wireless network by the mode reconfiguration and communication relay function by the RAS 112. It is possible.

2 is a block diagram showing the configuration of a communication relay device according to an embodiment of the present invention.

2, the communication relay apparatus according to an embodiment of the present invention includes a recognition unit 202, the determination unit 208, the connection unit 210, the control unit 212 and the relay unit 220, the recognition The unit 202 includes a terminal recognition unit 204 and a connection confirmation unit 206, and the control unit 212 includes a search unit 214, a measurement unit 216, and a selection unit 218.

The recognition unit 202 is responsible for identifying the wireless access environment of the terminal by the object recognition function. As described above, the object recognition means a concept in which the terminal does not recognize the wireless network environment by itself but is passively recognized by another device and is accepted as it is without the behavior of the terminal itself. The wireless access environment is a term used to collectively refer to a mode of a terminal, whether to connect to a network of a corresponding mode, a state of an access channel, and the like.

The terminal recognizing unit 204 recognizes a mode of the terminal, that is, a specific wireless access method. Here, the terminal includes both a multimode terminal and a single mode terminal. The multi-mode terminal refers to a terminal that can connect itself to various modes of a network, such as a smart phone recently released, and the single-mode terminal refers to a terminal that can connect only to a specific mode network, such as a second generation mobile phone.

The connection confirmation unit 206 checks whether the terminal is currently connected to a network corresponding to the mode of the terminal. If yes, determine if the access channel is available. When access failure occurs due to geographical factors in the area where the network base station and the terminal are located, when the interference is largely affected by other networks, when the signal strength is weak due to the location of the cell boundary, too many users in the area When a connection failure occurs due to simultaneous access and the like, the access channel is unavailable.

The determination unit 208 determines whether to provide a predetermined communication relay service to the terminal. When the connection state between the terminal and the network corresponding to the mode of the terminal is largely divided, 1) when the terminal is not connected to the network, 2) when the terminal is connected to the network but the access channel is unavailable, 3) It can be divided into the case where it is connected to a network and an access channel is available. In this case, the decision unit 208 decides to provide a predetermined communication relay service to the terminal in the case of 1) and 2). That is, if the terminal is not connected to the network of the mode, the communication relay service by active scanning actively searching for the terminal, and if the terminal is connected to the network of the mode but the access channel is not available It is determined to provide a communication relay service by passive scanning, such as receiving any electrical signal from the terminal.

The control unit 212 is responsible for determining the operation network to provide a predetermined communication relay service to the terminal. When it is determined by the decision unit 208 to provide a communication relay service, the search unit 214 searches for a network accessible in the current network environment, and the measurement unit 216 measures the quality of service (QoS) of the searched network. Measure QoS refers to the communication quality when the terminal is connected to the network, and specifically, the degree of interference by the natural environment of the region where the terminal and the network base station are located, the channel occupancy state by the service users in the region, and the corresponding network. It is a numerical value that considers the data transmission / reception speed etc. using the mode of. Therefore, the less interference, the fewer users occupy the channel occupied, and the higher the data transmission / reception rate by using the wideband channel in the mode, the higher the QoS will be. The selector 218 then selects the network having the highest QoS as the operation network as a result of the measurement.

The connection unit 210 connects to the terminal using the mode of the terminal, and connects to the operation network using the mode of the operation network. When the operation network to provide a communication relay service is determined by the controller 212, the connection unit 210 performs connection to each terminal and the operation network in order to directly relay communication between the terminal and the operation network. In this case, since the terminal is connected with the terminal without changing the mode of the terminal, the mode of the terminal and the mode of the operation network may be different. In this case, the communication relay device may be configured by a mode reconfiguration and switching function. It also enables communication relay between heterogeneous modes.

The relay unit 220 serves to relay communication between the connected terminal and the operation network. The relay unit 220 may include a receiver that receives information from a terminal and an operation network, and a transmitter that transmits information to the terminal and the operation network.

3 is a configuration diagram showing a configuration of a communication relay device according to another embodiment of the present invention.

Referring to FIG. 3, a communication relay apparatus according to another embodiment of the present invention may include a recognition unit 302, a controller 304, a network search unit 310, a channel search unit 312, and a channel switch unit 314. The control unit 304 includes a connection unit 306 and a relay unit 308.

The recognition unit 302 recognizes various terminals using the same mode by the object recognition function. For example, one terminal group may be recognized by first recognizing a mode of a specific terminal and finding terminals having the same mode.

The network search unit 310 searches for whether there is a network corresponding to the same mode as the terminals recognized by the recognition unit 302.

The control unit 304 serves to provide a predetermined communication relay service to the terminals by using the search result of the network search unit 310. As a result of the search, if there is a network corresponding to the same mode as the terminals, the communication between the terminals and the network is relayed. If there is no network corresponding to the same mode as the terminals, the communication between the terminals is directly relayed.

The connection unit 306 connects to the terminals and the network when there is a network corresponding to the same mode as the search result terminals of the network search unit 310, that is, when a specific mode infrastructure is installed in the corresponding area. In case there is no network corresponding to the same mode as the terminals, only the terminals are connected. There may be more than one terminal that can be connected at the same time.

The relay unit 308 relays communication between connected terminals and a network when there is a network corresponding to the same mode as the terminals, and directly communicates between connected terminals when there is no network corresponding to the same mode as the terminals. Relay. In the case of relaying communication between terminals, it serves as a kind of base station. At this time, the communication relay between the terminals may be one-to-many as well as one-to-many. For example, if several people have a radio-type terminal, when one person talks to the radio, it may be received by everyone else who has the same mode radio.

The channel search unit 312 searches for a channel occupancy state by networks in a corresponding region and checks whether a communication relay channel between terminals is being used by another network in consideration of a change in the wireless environment of the region. Do it. In other words, it performs a channel sensing function.

The channel switching unit 314 selects a dormant channel that is not currently used as a communication relay channel between terminals when the communication relay channel between the terminals is used by another network as a result of the search by the channel search unit 312. Do it. That is, the channel switching function is performed. This is to accommodate CR (Cognitive Radio) function.

For example, if a communication relay device can be used, for example, when an earthquake disaster relief country goes to relief work, it is simply installed in the area, even if no communication infrastructure is established in the area. This will enable communication between relief team members using the same terminal.

In the following description of the service providing method will be represented by replacing the communication relay device with RAS. RAS corresponds to an embodiment of a communication relay device in which the present invention is implemented.

4 is a view for explaining a communication relay service providing method according to an embodiment of the present invention.

In FIG. 4, the terminal 408 is located in an area where the network A 402 and the network B 404 of the heterogeneous mode are mixed, and the terminal 408 is currently connected to the network A 402 to receive a service. The RAS 406 recognizes that the channel state between the terminal 408 and the network A 402 is poor by object recognition through passive scanning. That is, it is recognized that the QoS of the network A 402 is low and cannot be used. The RAS 406 searches the neighboring network to confirm that the terminal 408 can be connected to the network B 404 to provide an improved quality of service. The RAS 406 performs a predetermined verification procedure between the network A 402, the network B 404, and the terminal 408, and then first connects to the terminal 408 using the mode of the terminal 408, and then the network B The mode of 404 is used to establish a connection with the network B 404. Then, by relaying the communication between the terminal 408 and the network B (404) by the mode reconfiguration function to provide a stable service without interruption to the user.

5 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.

In FIG. 5, the terminal 506 is connected to the network A 502 and provided with a service. The RAS 504 recognizes that the channel state between the terminal 506 and the network A 502 is poor by object recognition through passive scanning. The RAS 504 confirms that it can provide an improved quality of service by the alternate channel when acting as a relay node between the terminal 506 and the network A 502. The RAS 504 performs a predetermined verification procedure between the network A 502 and the terminal 506 and then interrupts the user by relaying the communication between the terminal 506 and the network A 502 through a relay channel. To provide reliable service.

6 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.

In FIG. 6, the terminal 610 is not connected to the neighboring network and thus the service is stopped. The RAS 608 recognizes the mode of the terminal 610 by object recognition through active scanning, and confirms that the terminal 610 is in a service request state. The RAS 608 recognizes the modes of the network A 602, the network B 604, and the network C 606 located nearby, and serves as a relay node between the terminal 610 and the network A 602. Confirm that it can provide a service to the terminal 610. The RAS 608 connects to the terminal 610 and the network A 602 and provides stable service to the user through mode reconfiguration and relay functions.

7 is a view for explaining a communication relay service providing method according to another embodiment of the present invention.

In FIG. 7, the terminals 710 and 712 are not connected to the neighboring network, so the service is suspended. The RAS 708 recognizes the modes of the terminals 710 and 712 by object recognition through active scanning, and confirms that the terminals 710 and 712 are in a service request state. The RAS 708 recognizes the modes of the network A 702, the network B 704, and the network C 706 located nearby, and compares the modes of the terminals 710 and 712 to confirm that there is no matching network. do. After confirming that the RAS 708 can provide a service by configuring a virtual network 714 using the modes of the terminals 710 and 712, the RAS 708 connects to the terminals 710 and 712 to relay a direct communication. To provide reliable service.

In addition, if a channel providing services through the above virtual network becomes bad due to a change in the surrounding network environment, or a network that is already built around the channel is used, the RAS is switched to another sleeping channel that was recognized. The channel can be switched to provide a service. That is, spectrum sensing and spectrum switching can be performed.

8 is a flowchart illustrating a flow of a communication relay method according to an embodiment of the present invention.

The RAS first recognizes the mode of the terminal (S802) and checks whether the terminal is connected to a network corresponding to the mode of the terminal (S804). When connected, it is checked whether an access channel between the terminal and the network is available (S806), and if it is available, maintains the current connection state (S808).

If the terminal is not connected to the network corresponding to the mode of the terminal (S804), or if the access channel between the terminal and the network is unavailable even when connected (S806), the RAS determines an operation network to provide a communication relay service ( S810). Determination of the operation network has been described above with reference to FIG. 2. When the operating network is determined, the RAS connects to the terminal using the mode of the terminal (S812), and connects to the operating network using the mode of the operating network (S814), and relays the communication between the terminal and the operating network (S816). ). Modes of the connected terminal and the network may be the same or different. The communication relay device may transmit and receive information even between heterogeneous modes by a mode reconfiguration and conversion function.

9 is a flowchart illustrating a flow of a communication relay method according to another embodiment of the present invention.

The RAS recognizes terminals using the same mode (S902), and searches whether there is a network corresponding to the same mode as the terminals (S904).

If there is a network corresponding to the same mode as a result of the search, the terminal and the network are connected (S906), and communication between the terminals and the network is relayed (S908).

If there is no network corresponding to the same mode as a result of the search, the terminal is connected to the terminal (S910), and communication between the terminals is directly relayed (S912). That is, the virtual network is configured in a specific mode. In this case, the RAS serves as a kind of base station. In this case, two or more terminals connected to the RAS may be connected, and one-to-many communication may be performed between the connected terminals. In addition, the RAS checks whether the communication relay channel between the terminals is used by another network (S914), and switches the channel by selecting another dormant channel that has been recognized as a relay channel (S916).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

Claims (20)

In the communication relay method of the communication relay device in a multi-mode wireless environment,
Identifying a wireless access environment of the terminal by an object recognition function;
Determining whether to provide a predetermined communication relay service to the terminal; And
Determining an operational network to provide the predetermined communication relay service;
Communication relay method.
The method of claim 1,
The terminal
Including a multimode terminal and a single mode terminal
Communication relay method.
The method of claim 1,
Identifying the wireless access environment of the terminal
Recognizing a mode of the terminal; And
Checking whether the terminal is connected to a network corresponding to a mode of the terminal;
Communication relay method.
The method of claim 3,
Determining whether to provide a predetermined communication relay service for the terminal
If the terminal is not connected to a network corresponding to the mode of the terminal, determining that the communication relay service by active scanning is provided to the terminal.
Communication relay method.
The method of claim 3,
Determining whether to provide a predetermined communication relay service for the terminal
When the terminal is connected to the network corresponding to the mode of the terminal, and the terminal cannot use the access channel with the network corresponding to the mode of the terminal, providing a communication relay service by the manual scanning to the terminal Determining to include
Communication relay method.
The method of claim 1,
Determining the operating network
Searching for one or more accessible networks;
Measuring QoS of the one or more networks; And
Selecting as the operating network a network having the highest QoS as a result of the measurement;
Communication relay method.
The method of claim 1,
Accessing the terminal using a mode of the terminal;
Accessing the operational network using the mode of the operational network; And
Relaying a communication between the terminal and the operation network;
Communication relay method.
8. The method of claim 7,
The step of relaying communication between the terminal and the operation network is
If the mode of the terminal and the mode of the operation network are different, performing a communication relay between heterogeneous modes by a mode conversion function;
Communication relay method.
In the communication relay method of the communication relay device in a multi-mode wireless environment,
Recognizing two or more terminals using the same mode by an object recognition function;
Searching for a network corresponding to a mode such as a mode of the two or more terminals; And
Providing a predetermined communication relay service to the two or more terminals by using the search result.
Communication relay method.
The method of claim 9,
Providing a predetermined communication relay service to the two or more terminals
As a result of the search, if there is a network corresponding to the same mode as the mode of the two or more terminals,
Accessing the two or more terminals;
Connecting to the network; And
Relaying communication between the two or more terminals and the network;
Communication relay method.
The method of claim 9,
Providing a predetermined communication relay service to the two or more terminals
As a result of the search, when there is no network corresponding to the same mode as the mode of the two or more terminals,
Accessing the two or more terminals; And
Relaying the communication between the two or more terminals;
Communication relay method.
12. The method of claim 11,
Checking whether the communication relay channel between the two or more terminals is in use by another network; And
If the channel is being used by the other network as a result of the checking, selecting a dormant channel not being used by the other network as the communication relay channel;
Communication relay method.
Recognizing unit for identifying the wireless connection environment of the terminal by the object recognition function;
A decision unit to determine whether to provide a predetermined communication relay service to the terminal; And
And a controller configured to determine an operation network to provide the predetermined communication relay service.
Communication relay device in a multimode wireless environment.
The method of claim 13,
The recognition unit
A terminal recognition unit recognizing a mode of the terminal; And
And a connection confirmation unit for checking whether the terminal is connected to a network corresponding to the mode of the terminal.
Communication relay device in a multimode wireless environment.
The method of claim 13,
The determination unit
If the terminal is not connected to the network corresponding to the mode of the terminal, it is determined to provide a communication relay service by the active scanning to the terminal,
When the terminal is connected to the network corresponding to the mode of the terminal, and the terminal cannot use the access channel with the network corresponding to the mode of the terminal, providing a communication relay service by the manual scanning to the terminal Decided to
Communication relay device in a multimode wireless environment.
The method of claim 13,
The control unit
A search unit searching for one or more accessible networks;
A measuring unit measuring QoS of the at least one network; And
And a selection unit for selecting a network having the highest QoS as the operation network as a result of the measurement.
Communication relay device in a multimode wireless environment.
The method of claim 13,
A connection unit connecting to the terminal using the mode of the terminal and connecting to the operation network using the mode of the operation network; And
Further comprising a relay for relaying communication between the terminal and the operation network
Communication relay device in a multimode wireless environment.
A recognition unit for recognizing two or more terminals using the same mode by an object recognition function;
A network searching unit searching for a network corresponding to a mode identical to that of the two or more terminals; And
And a controller configured to provide a predetermined communication relay service to the two or more terminals by using the search result.
Communication relay device in a multimode wireless environment.
19. The method of claim 18,
The control unit
A connection unit connecting to the two or more terminals or the network; And
And a relay unit which relays communication between the two or more terminals or between the two or more terminals and the network.
Communication relay device in a multimode wireless environment.
20. The method of claim 19,
A channel searching unit checking whether the communication relay channel between the two or more terminals is used by another network; And
And a channel switching unit for selecting a dormant channel that is not being used by the other network as the communication relay channel when the channel is used by the other network.
Communication relay device in a multimode wireless environment.

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