KR20080087537A - Wireless network communication method, wireless network system and vehicle terminal - Google Patents

Abstract

A communication method in a wireless network, a wireless network system, and a vehicle terminal are provided to enable various terminals related to a vehicle to transmit and receive data one another by wireless without any cable. A terminal in a vehicle includes a communication module and a control part. The communication module transmits and receives data. The control part receives data containing at least one address through the communication module. In case the received data contain a bridge address, the control part directs the communication module to transmit the data. If the received data contain a destination address, the control part transmits the data to the destination address through the communication module.

Description

Wireless network communication method, wireless network system, vehicle terminal {WIRELESS NETWORK COMMUNICATION METHOD, WIRELESS NETWORK SYSTEM AND VEHICLE TERMINAL}

1 is a conceptual diagram of a vehicle implemented with a wireless network system according to an embodiment of the present invention.

2 is a block diagram of a wireless network system according to an embodiment of the present invention.

3 is a flowchart illustrating a process in which terminals associated with a vehicle are connected according to the WiNET standard according to an embodiment of the present invention.

4 is a diagram conceptually illustrating a process of transmitting data by terminals mounted on vehicles connected to each other through the connection process illustrated in FIG. 2.

5 to 7 are data flow diagrams of a communication method in a wireless network according to another embodiment of the present invention.

The present invention relates to a communication method and a wireless network system in a wireless network capable of transmitting data between terminals associated with a vehicle.

As vehicles, such as automobiles, have evolved, vehicle telematics has been added, which provides a variety of functions in addition to the vehicle's general electronics. The vehicle had to be installed in the vehicle as well as cables connecting general electronic devices to each other as well as telematics for the vehicle.

Cables connecting the vehicle's general electronics or vehicle telematics have been installed in the vehicle, making it difficult to design the vehicle itself and increasing the risk of failure due to complex cables.

Accordingly, an object of the present invention is to provide a communication method in a wireless network system and a wireless network in which various terminals related to a vehicle can exchange data with each other wirelessly without a cable.

The present invention provides a communication method comprising receiving data including at least one address, checking an address included in the received data, and transmitting data when the address included in the data is a pass-through address. It may provide a method.

In another aspect, the present invention is a communication module for transmitting and receiving data, and receives data including at least one address through the communication module, and determines the address included in the received data, via the address included in the data In the case of an address, a terminal including a control unit for controlling data transmission through a communication module may be provided.

Hereinafter, with reference to the drawings will be described embodiments of the present invention;

1 is a conceptual diagram of a vehicle implemented with a wireless network system according to an embodiment of the present invention.

Referring to FIG. 1, a vehicle 10 in which a wireless network system according to an embodiment of the present invention is implemented refers to any vehicle capable of moving a person or an object such as a general car, a bus, and a train. In the present specification, a wireless network system according to an embodiment of the present invention will be described with reference to an automobile mainly intended for movement of a person, but is not limited thereto.

The vehicle 10, together with general components such as the body 12, the handle 14, and the wheels 16, provides a head unit 18, a rear seat entertainment (RSE) device (RSE) that provides various functions. 20), Car Personal Computer (22).

The head unit 18 may be a terminal including a vehicle telematics system. The vehicle telematics system provides an AV module that provides audio and video to the driver, a hands-free module that can communicate with the other party to which the communication path is hands-free, and a traffic information such as route guidance. Provided vehicle information module is integrated.

1 and 2, the head unit 18 includes a main board 24 and an audio board 26.

The main board 24 displays a controller or central processing unit 28 for controlling the system as a whole, a memory 30 for storing various information, a key control unit 32 for controlling various key signals, and an image device. An image controller 34 for control is included.

 In particular, the motherboard 24 includes a UWB (UWB) module 36. Accordingly, the head unit 18 may be connected to other terminals, for example, the RSE 20 or the copy 22 via a wireless network through the UWB module 36.

The main board 24 has a GPS 38 for receiving GPS signals for locating a vehicle, tracking a route from a starting point to a destination, a CD deck 40 for reproducing a CD signal, or the like through a cable or a direct connection. It is. The GPS 38 receives the GPS signal via the antenna 42.

The main board 24 is connected to the antenna 46 and the CDMA (44) which is a communication module for telematics service. The CDMA 44 is always in a waiting state for reception when power is supplied to the vehicle navigation system, and receives distance information, current time information, and the like provided from the vehicle information center.

In addition, a TV module 48 for receiving a TV signal is connected to the main board 24, and the TV module 48 receives a TV signal through the TV antenna 50.

The main board 24 is connected to the video device 54 under the control of the video control unit 34 and the front board 56 under the control of the key control unit 32 via the interface 52. The video device 54 displays various video signals and text signals. The front board 56 includes buttons for inputting various key signals, and provides a key signal corresponding to a button on which a user is selected to the main board 24.

The head unit 18 is connected to the main board 227, and the audio board 26 for processing various audio signals is connected. The audio board 26 includes a microcomputer 58 for controlling the audio board 26, a tuner 60 for receiving radio signals, and a signal processor 62 for performing signal processing for outputting various audio signals. It is included.

The audio board 26 is connected to a radio antenna 64 for receiving a radio signal, a tape deck 66 for reproducing the audio tape, and the like. The audio board 242 is also connected to the interface 52. The audio board 26 is connected with an amplifier 68 for outputting a voice signal processed by the audio board 26.

Referring back to FIGS. 1 and 2, the RSE device 20 is a terminal including a display that allows an occupant to view an image in the rear seat of the vehicle 10.

Similar to the head unit 18, the RSE apparatus 20 includes a control unit 70, a memory 72, a key control unit 74, an image control unit 76, and a UWB module 78. The key control unit 74 and the image control unit 76 are connected to the image device 80 and the front board 82 through the interface 79, respectively.

Since the RSE device 20 includes the UWB module 78 described above, the RSE device 20 may be wirelessly connected to the head unit 18 described above through the UWB wireless network.

The copy 22 is a vehicle-specific information processing apparatus that is in charge of various processes for controlling the operation and running of the head unit 18, the RSE apparatus 20, and the vehicle 10 itself.

The copy 22 includes a control unit 80 and a memory 82 like general computer devices such as general personal computers, servers, and notebook computers. In this case, the copy 22 may or may not include an input / output device such as an image device or a keyboard included in a general computer device.

The copy 22 may also include a UWB module 86 for exchanging data with the head unit 18, the RSE device 20, and an electronic device of a general vehicle. Accordingly, the copy 22 may also be wirelessly connected through the wireless network by using the head unit 18, the RSE device 20, and the UWB module 86.

Here, UWB, which is a communication technology used by the UWB modules 36, 78, and 84, is a communication technology of a system for transmitting a signal by modulating a short impulse. UWB has a low power consumption, while using a wide frequency band of several to several tens of GHz.

 The UWB modules 36, 78, and 84 may use Wireless USB technology that is in charge of USB transmission technology based on Ultra Wide Band (UWB) and WiNET technologies that enable IP communication based on UWB. However, the UWB module may use wireless USB communication technology as well as wireless USB technology and WiNET technology as well as various UWB-based wireless communication technologies.

The transmission speed of the system according to UWB ranges from 500Mbps to 1Gbps, which is 10 times faster than IEEE802.11a (54Mbps), which is currently the fastest wireless LAN standard, and can coexist with security functions and other wireless networking technologies. . Therefore, the head unit 18, the RSE device 20, and the copy 22 described above are not only connected to the wireless network through the UWB modules 36, 78, and 84, but also various kinds of wireless LAN, Brutus, WiMAX, and the like. It may be connected by wireless network technology.

The head unit 18, the RSE device 20, and the copy 22 described with reference to FIG. 1 may be connected to each other by a wireless network using the UWB modules 36, 78, and 84. In addition, in addition to these, if other terminals entering the area that can be connected to their UWB modules 36, 78, 84, for example, the driver's mobile terminal also includes a UWB module, they are wirelessly connected to each other. Can be connected to a network. In addition, if the electronic devices of the telematics or the vehicle itself, such as a vehicle speaker, an anti-collision radar on the front and rear of the vehicle, a road condition detection radar, a vehicle gateway, and the like, may include a UWB module, they may be connected to each other via a wireless network.

In addition to the terminals mounted on the vehicle 10 or located in the vehicle 10 as described above, the terminals and the terminals mounted on the vehicle 10 or located in the vehicle 10 and the UWB module are located in close proximity to the vehicle 10. Terminals that can be connected to each other in a wireless network can also be seen as a terminal of a wireless network system herein.

For example, when the head unit mounted on another vehicle and the terminals mounted on the vehicle shown in FIG. 1 or located in the vehicle are located close to each other to be connected to the UWB module are connected to each other by a wireless network, according to an embodiment of the present invention. In a wireless network, data can be sent and received using a communication method. Therefore, in the present specification, a terminal related to a vehicle should be understood to include all terminals that can be connected to a wireless network using a vehicle and a UWB module as well as a terminal mounted in or located in the vehicle.

2 is a flowchart illustrating a process in which terminals associated with a vehicle are connected according to the WiNET standard according to an embodiment of the present invention. FIG. 2 illustrates a process in which terminals related to a vehicle are connected to each other through the UWB modules 36, 78, and 84 according to the WiNET standard. However, terminals according to an embodiment of the present invention are connected to the process illustrated in FIG. It is not limited, and can be linked to each other by any manner of linking process that will be standardized, used or applied now or in the future.

The register terminal and the request terminal shown in FIG. 2 are terms defined in the WiNET standard specification. The registrar is a terminal registered in an existing WSS (WiNET Service Set), and the request terminal (Enrollee) is defined as a terminal that searches for a WSS to register with the WSS.

That is, a terminal to which the WiNET technology is applied may generate a WSS and register its terminal with the WSS, or request a registration with an existing WSS.

For example, the head unit 18 and the RSE device 20 applied to the inside of the vehicle 10 may be a registrar or an enrollee. The Registrar and Enrollee are used only during the connection / authentication process. Once registered, two different terminals perform data communication with each other on the same level.

Referring to FIG. 2, a WiNET-enabled terminal, for example, the head unit 18 and the RSE device 20 exchange a plurality of messages from D1 to C2 in order to perform a connection / authentication step. Should be done. After the C2 step, the 4-way handshake defined in the WiMedia MAC standard specification is not shown in FIG.

The D1 and D2 processes are performed by the requesting terminal (Enrollee) to find out whether a network supporting WiNET exists. That is, the process of finding out whether the WSS exists and what WSSID (WiNet Service Set Identifier) exists.

If the WSS is found, the Enrollee negotiates the E1 and E2 messages by negotiating with the Registrar a method that can be used in the process of connecting to the WSS.

If the connection method is selected in the steps E1 and E2, the message exchange process from M1 to M8 is performed through the corresponding method.

Although many encryption algorithms and hash algorithms are used in the message exchange process from M1 to M8, the ultimate goal is to securely exchange information related to the WSS Property held by the Registrar, especially the WSS Master Key. ) Is the final goal.

In step E1 ~ E2, the user selects and associates one of the Enrollee-display method, Regitrar-display method, Numeric Comparison, and User-provided Password.

The connection / authentication process as shown in FIG. 2 is required in a secure WSS environment, and depending on the configuration, the WSS can be configured as an insecure WSS environment, and devices belonging to the WSS can perform data communication in an unencrypted environment.

If it is an insecure WSS environment, the steps of E1 ~ M8 are not necessary in the connection / authentication process. Whether or not it is a secure WSS or non-secure WSS environment can be checked through the WSS Information field in the D2 message.

3 is a diagram conceptually illustrating a process of transmitting data by terminals mounted in vehicles connected to each other through the connection process illustrated in FIG. 2. In this case, the terminals A to D shown in FIG. 2 are the head unit 18 and the RSE device 20, the copy 22, the speaker for the vehicle, the collision preventing radars of the front and rear surfaces of the vehicle, and the road condition detection. Radar, vehicle gateway, or the like.

Referring to FIG. 3, when data is transmitted from terminal A, for example, a copy 22, to a terminal C, for example, the head unit 18, or vice versa, a vehicle 10 of the vehicle 10. Noise, human presence and signal weakness can cause transmission disturbances. Therefore, a terminal D of FIG. 3, for example, a wireless device including a UWB module, such as an RSE device, is disposed on the ceiling of the vehicle 10, and data is transferred via the terminal D when data is exchanged between the terminal A and the terminal C. FIG. Can send and receive Accordingly, the above problems of the vehicle environment can be overcome, and data can be efficiently exchanged between the terminal A and the terminal C. FIG.

In addition, if there is a terminal B having a UWB module, for example, a driver's mobile communication terminal in the vehicle 10, the terminal B also passes through the terminal D when data is exchanged between the terminal A and the terminal C, similarly to the terminal D. To send and receive data.

In this case, the terminal B and / or terminal D via the data exchange between the terminal A and the terminal C may include components other than the UWB module, such as the RSE device or the mobile communication terminal described above, but the UWB module and the UWB module It may also include only a control unit that controls the operation. In the latter case, the transit terminals may only perform the transit function when exchanging data between the terminal A and the terminal C.

Here, the method of determining whether the terminal A and the terminal C exchange data with each other via the other terminal B or D may vary.

For example, when the terminal A and the terminal C exchange data, one of the terminal B, D may be selected as a transit terminal according to the state of the wireless network, or the transit terminal may be changed while transmitting or receiving data. That is, when the terminal A and the terminal C communicate with the other mobile communication terminal while the terminal D is communicating through the terminal D, the terminal D may stop relaying data between the terminal A and the terminal C, and Terminal C may primarily communicate through terminal B.

In addition, in order to ensure the performance of data communication in the topology of FIG. 3, a terminal via which new vehicle data is added to a WiNET frame type as shown in Table 1 may be designated.

As shown in Table 1, this shows the types of WiNET frame formats for data communication after performing the connection / authentication process between WiNET terminals. Standard data is used when a source address and a destination address exist in a plurality of devices. Abbreviated Data is used when one source address and one destination address exist. Control is used to control Bridge, DRP, etc. Association is used for the authentication and connection process.

Vehicle Data is a vehicle data frame format including a designated bridge address as shown in Table 2, and includes a WiNET Frame Type, WSS tag, BA Exist Flag, BA Count, BAdestination address, source address, Type / length, and Client. May contain data. Since vehicle data is used in this way, data can be selectively used by separating data that requires a lot of system resources.

Here, the WiNET frame type is set to "4" as shown in Table 1. WSS tag is used for WSS authentication of data, destination / source address indicates receiving address and sending address, and Type / length indicates attribute and length of client data. For example, Type can represent AV Streaming and Protocol difined by user, as shown in Table 3.

In addition, the BA Exist Flag indicates whether a bridge address exists. At this time, as shown in Table 4, the BA Exist Flag uses B0, but can be expanded to B1 to B7. BA Count represents the number of passthru addresses that are not in use. BA represents a transit address that is not in use among the transit addresses.

In order to ensure the performance of data communication in the structure of FIG. 3, new vehicle data is not added to the WiNET frame type as shown in Table 1, but the standard data or the abbreviated data of Table 1 are used as they are. You can also specify a terminal. For example, as shown in Table 5, the existing standard data is used as it is, but it indicates that the type is transmitted via the diesel terminal, and specific information about the diesel terminal may be included in the client data.

At this time, the BA Exist Flag, BA Count, and BA are included in the client data.

Here, the standard data shown in Table 5 is substantially the same as the information including the vehicle data shown in Table 2, but the field or location where the information is included is different.

The WiNET frame type is set to "0" to indicate standard data as shown in Table 1. Type represents an attribute of client data. In other words, Type indicates that it is transmitted through another terminal. In addition, BA Exist Flag, BA Count, and BA included in the client data are substantially the same as in Table 1. The type included in the client data indicates the actual data type included in the client data in addition to the BA Exist Flag, BA Count, BA, and Type. This type can represent AV Streaming and Protocol difined by user as shown in Table 3.

4 to 6 are data flow diagrams of a communication method in a wireless network according to another embodiment of the present invention. 4 through 6 illustrate a communication method in a wireless network according to another embodiment of the present invention in various forms. 4 to 6 exclude a vehicle for convenience of description among terminals related to the vehicle illustrated in FIGS. 1 to 3.

1 and 4, the wireless network system related to the vehicle 10 includes two terminals A and C for data communication and two terminals B and D for data transmission as shown in FIG. 3. Doing.

Since data is wirelessly transmitted from A to C (or vice versa), the data may be transmitted via B or D depending on the internal environment of the vehicle 10 or may be directly transmitted to C without passing through the data.

Each case according to whether or not the destination address of the vehicle data and the waypoint is identical is as follows. Through the authentication / connection process, each terminal A, B, C, D all have waypoint information, that is, wireless network information in the vehicle.

1. If the Destination Address is not BA

1) Transfer from terminal A to terminal C

When the terminal C confirms that the data is not via the BA1 and BA2, the BA candidates of the terminal C include BA1 and BA2. If the terminal C checks the data via BA1, BA2 of the terminal is present. If the terminal C checks the data via BA2, BA1 of the terminal C exists. If the data is passed through BA1, BA2, or BA2, BA1 in order when confirmed by the terminal C, there is no BA candidate of the terminal C.

2) transfer from terminal C to terminal A

If the terminal A does not check the data via BA1 and BA2, the BA candidates of the terminal A include BA1 and BA2. If the terminal A checks the data via BA1, the BA candidate of the terminal A exists in BA2. If the terminal A checks the data via BA2, the BA candidate of the terminal A exists in BA1. There is no BA candidate for terminal A if the data is passed through BA1, BA2 or BA2, BA1 in turn when confirmed by terminal A.

2. When Destination Address is BA

1) 0 BA (i.e. without B, D)

It is similar to the existing standard data. However, BA Exist Flag is different in zero and type.

2) One BA

There is no BA candidate for terminal D and terminal B if it is transmitted from terminal A to terminal D, terminal C to terminal D, terminal A to terminal B, or terminal C to terminal B.

3) When there are two or more BAs

Except for the destination BA, the terminal is a BA candidate of the terminal D.

1 and 5, while the AV streaming data is continuously sent from the terminal A to the terminal D and the terminal D to the terminal C, the terminal C can be sent to the terminal A through the terminal B without using the control signal. have.

That is, it is assumed that the AV streaming data, which is relatively large in size, requires a lot of resources of the system, is transmitted to the terminal C through the terminal D, and the terminal D transfers the data of the terminal A to the terminal C. At this time, when the terminal C transmits to the terminal A through the terminal B which does not use the control data having a relatively small size by the user's input, the performance of the wireless network is maximized because it passes through the terminal without load in the vehicle 10 environment. You can.

Tables 6 and 7 show data transmitted from terminal A to terminal D and terminal D to terminal C, respectively.

When transmitting from terminal A to terminal C, the candidate BA may be terminal B (BA2) and terminal D (BA1). In this case, it is assumed that the terminal B is transmitted to the terminal D without going to the terminal B because of a transmission failure due to noise or the presence of a person. Therefore, since the terminal D receives the data transmitted from the terminal A and the destination is not the terminal D, the terminal D is configured as the remaining BA candidate, that is, the terminal B when the terminal D transmits the terminal C.

Of course, since it is a wireless environment, there is no guarantee that the terminal D is directly transmitted to the terminal C. For example, the terminal D may pass through the terminal B. There is no BA candidate when retransmitting from terminal B to terminal C. In this case, it is assumed that the AV streaming data and the control data go through one waypoint in order to separately transmit the data.

Tables 8 and 9 show data transfer from terminal C to terminal B and terminal B to terminal A using unused pass-through terminal B.

When transmitting from terminal C to terminal B, it consists of BA count = 1, BA = BA2 (B), Type = 1 (control data), and when transmitting from terminal B to terminal A, there is no BA candidate, so BA Exist flag = zero and BA count, BA are configured to be absent.

In addition, when selecting a BA candidate as D in Tables 6 and 7, all unused BAs can be configured and transmitted as described above, and only a specific BA is selected by using signal strength information of A ↔ D and A ↔ B. You can also send. That is, the terminal in the vehicle 10 may select a specific BA using the signal strength information up to the waypoint.

1 and 6, in the same wireless network structure as in FIGS. 4 and 5, the terminal A has a part of one data, for example, some packets 1 and 3 of the data, and the other through the terminal D. Some packets 2 and 4 may pass through terminal C.

Accordingly, as can be seen from FIGS. 4 to 6, the two terminals A and C exchange data with each other as shown in FIGS. 4 and 5. There is also a method via D, and as shown in FIG. 6, a part of one data passes through different terminals B and D, and it can be seen that they can be combined.

In various ways described above, since two terminals including the UWB module exchange data via at least one terminal, a plurality of terminals transmit data safely and efficiently in a vehicle environment in which a lot of noise and human presence exist. I can receive it.

In particular, the noise of the vehicle 10 during wireless transmission to a terminal equipped with a radio device at the rear of the vehicle 10, for example, the head unit of FIG. 1 mounted at the front of the vehicle 10, for example telematics. Alternatively, UWB-based wireless communication with a maximum output power of -41.25 dBm / MHz in a total 7.5 GHz band from 3.1 GHz to 10.6 GHz may be possible in a harsh vehicle environment such as human presence.

Embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited thereto.

In the above embodiment, it has been described that the terminals related to the vehicle are connected to each other or each through the UWB module, but the present invention is not limited thereto. The UWB module may be connected to each other using any wireless network communication technology existing or possible in the present or future, such as a wireless LAN, a wibro, or a Wimax. Of course, two or more wireless network communication technologies may be used simultaneously or selectively.

In the above embodiment, it has been described as one or two transit terminals, but may be three or more. As the number of transit terminals increases, the route that can be selected may also vary.

In the above embodiment, it has been described that the two terminals exchange data or communicate through the pass-through terminal, but depending on the situation, the two terminals may communicate directly without passing through the other terminal. Of course, the former and the latter may be switched. For example, if two terminals communicate through each other and the communication state of the other terminal becomes worse, the two terminals may communicate directly. Of course, the opposite can also be true.

In the above embodiment, the terminals are described as being connected according to the WiNET standard, but may be connected according to other communication technologies such as wireless USB. In addition, it is possible to refer to the WiNET standard, but various modifications may be possible. In addition, the terminals may be insecurely connected rather than securely connected.

In the above embodiment, it has been described that data is transmitted via another terminal according to the size of the data, but the present invention is not limited thereto. For example, the data may be transmitted via another terminal according to the importance of the data.

The drawings and detailed description of the invention are merely exemplary of the invention, which are used for the purpose of illustrating the invention only and are not intended to limit the scope of the invention as defined in the claims or in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Accordingly, the present invention has the effect that the various terminals associated with the vehicle can be connected to each other by wireless connection without a cable.

Claims (17)

Receiving data including at least one address; Confirming an address included in the received data; And transmitting the data if the address included in the data is a pass-through address. The method of claim 1, The data includes at least two addresses, And when the data includes a destination address, transmitting the data to the destination address. The method of claim 1, The data may further include any one or more of presence or absence of a passthru address, a number of passthru addresses that are not in use, and a passthru address that is not in use. The method of claim 1, And the data is received or transmitted over an ultra-wideband wireless network. Communication module for transmitting and receiving data; Receive data including at least one address through the communication module, determine the address included in the received data, and transmit the data through the communication module when the address included in the data is a pass-through address. A terminal comprising a control unit for controlling. The method of claim 5, The data includes at least two addresses, And the control unit transmits the data to the destination address when the data includes the destination address. The method of claim 5, The data may further include any one or more of presence or absence of a passthru address, a number of passthru addresses that are not in use, and a passthru address that is not in use. The method of claim 5, The communication module is characterized in that for transmitting and receiving the data via an ultra-wideband wireless network. At least three terminals being connected to each other or to each other; Two of the at least three terminals transmitting and receiving at least one data via at least one other terminal. The method of claim 9, There are a plurality of terminals via And when the two terminals transmit and receive data with each other, the data pass through different terminals. The method of claim 9, A communication method in a wireless network, characterized in that via a different terminal according to the size or importance of the plurality of data. The method of claim 11, One of the plurality of data is AV streaming data, and the other of the plurality of data is control data in a wireless network. The method of claim 9, There are a plurality of terminals via When the two terminals transmit and receive a plurality of data, the communication method in the wireless network, characterized in that the terminal to be determined or changed depending on the state of the network. The method of claim 9, The data has a frame format including a waypoint address along with a destination address, And the data is transmitted to the terminal corresponding to the destination address via the terminal corresponding to the pass-through address. The method of claim 14, The data may further include any one or more of presence or absence of a passthru address, a number of passthru addresses that are not in use, and a passthru address that is not in use. The method of claim 15, The two terminals for transmitting and receiving data are a head unit located in a front part of the vehicle and a copy located in a rear part, respectively. The method of claim 9, And the terminals transmit and receive the data through an ultra-wideband wireless network.

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