KR20120121662A - Wireless Ethernet transmission apparatus and method for traffic transmitting in the apparatus - Google Patents

Abstract

PURPOSE: A wireless ethernet transmission apparatus and traffic transmission method in an apparatus are provided to match the synchronization of transmission and reception by eliminating interference between modems in a wireless ethernet transmission apparatus. CONSTITUTION: A wireless ethernet transmission apparatus(200) includes a plurality of modems(220), a transmission unit(230), a reception unit(240), a control unit(210), and a switch(250). The control unit determines each modem mode using the traffic quantity of each direction and a radio wave propagation environment. The control unit determines the channel of each modem and traffic quantity in order to operate each modem in the determined mode. The control unit provides a switching signal for operating a mode in timing to modems which use adjacent channels. [Reference numerals] (210) Control unit; (220) Modem; (230) Transmission unit; (232) Combining unit; (240) Reception unit; (242) Distributing unit; (246) Receiving filter; (250) Switch; (260) Antenna; (AA) Switching signal

Description

Wireless Ethernet transmission apparatus and traffic transmission method in the device {Wireless Ethernet transmission apparatus and method for traffic transmitting in the apparatus}

The present invention relates to a wireless Ethernet transmission device and a traffic transmission method in the device, and more particularly, to determine the mode of the modems provided on the basis of the traffic amount and the propagation environment in each direction, each modem to the determined mode Determining a channel and traffic amount for each modem to operate, the present invention relates to a wireless Ethernet transmitter and a method for transmitting traffic in the apparatus, each modem performs a transmission or reception operation according to the switching signal.

The mobile communication network should guarantee the seamless service of the data traffic while ensuring the mobility of the terminal. For these services, service providers generally establish and use a dedicated network. However, the construction of such a private network is expensive in terms of initial construction cost and network maintenance cost. Therefore, in order to reduce such costs, base stations using Ethernet as a dedicated network are increasingly using devices that transmit Ethernet wirelessly. These solutions are wireless Ethernet transmitters and use a variety of frequency bands ranging from 5GHz unlicensed bands, microwave bands above 10GHz, and mm-wave bands from 70 to 80GHz.

Among them, the wireless Ethernet transmitter using the 5GHz unlicensed band has been widely used due to the advantage that a low-cost wireless LAN modem can be used as it is and can be used to produce low-cost equipment.

5GHz wireless Ethernet transmitters mainly use time division multiplexing, with bandwidths ranging from 20MHz to 40MHz.

1 is a view showing a conventional 5GHz wireless Ethernet transmitter.

Referring to FIG. 1, the wireless Ethernet transmitter 100 includes a modem 100, an amplifier (AMP) 120, a switch 130, an antenna 150, and a low noise amplifier (LNA) 150.

The modem 110 modulates a digital transmission signal into an analog transmission signal, transmits the signal to the amplifier 120, and demodulates the analog reception signal received through the antenna 140 into a digital signal. . In addition, the modem 110 generates and applies a switching signal to the switch 130 in order to transmit or receive the signal through the antenna 140.

The amplifier 120 amplifies the transmission signal from the modem 110 to transmit through the antenna 140.

The low noise amplifier 150 low noise amplifies the received signal received through the antenna 140 and transmits it to the modem 110.

The switch 130 switches the modem to operate in a transmission mode or a reception mode according to a switching signal from the modem 110.

However, there may be a scheme in which the wireless Ethernet transmission device configured as described above uses a plurality of modems to increase capacity. When the transmission and reception synchronization between the modems is not matched, the other modem receives the timing at one modem transmission. The transmission signal affects the reception signal, causing quality degradation.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a wireless Ethernet transmission apparatus capable of eliminating interference between modems and synchronizing transmission and reception in a wireless Ethernet transmission apparatus in which a plurality of modems are combined. It is to provide a traffic transmission method.

Another object of the present invention is to provide a wireless Ethernet transmission device and a traffic transmission method in the device by combining a low-cost wireless LAN modem to enable high-capacity wireless transmission.

It is still another object of the present invention to provide a wireless Ethernet transmission apparatus capable of automatically arranging frequencies so that different modems can use frequencies in a separate band without using adjacent channel frequencies when transmission and reception occur simultaneously. It is to provide a traffic transmission method.

According to an aspect of the present invention to achieve the above object, a plurality of modems for operating as a transmission modem or a reception modem to modulate or demodulate a transmission signal or a reception signal, coupling the transmission signals from the transmission modem, the couple A transmitter for amplifying the ringed signal and transmitting the signal through an antenna, and removing the out-of-receive band frequency from the signal received through the antenna to low noise amplification and distributing the low noise amplified signal to each receiving modem according to the traffic amount determined by the controller. Determine the mode of each modem by using the receiver, the traffic volume and the radio environment in each direction, and determine the channel and the traffic volume for each modem so that each modem operates in the determined mode, the same for modems using adjacent channels. A controller for applying a switching signal to perform the same mode operation in timing, the controller The Wireless Ethernet transmission apparatus in which each modem is a switch for switching to perform the transmission or reception operation is provided according to the switching signal from the.

The plurality of modems operate in full duplex or half duplex depending on the mode determined by the controller.

When the modems operate in full duplex, at least one of the plurality of modems operates as a transmitting modem, at least one as a receiving modem, and a switching signal for allowing modems using adjacent channels to perform the same mode operation at the same timing. Received from the control unit performs the same operation of transmitting or receiving.

In addition, when the modems operate in half duplex, the plurality of modems operate only as a transmission modem or only as a reception modem at the same timing.

The transmitter includes a combiner for receiving and coupling the traffic transmitted from each of the transmission modems, and an amplifier for amplifying the coupled signal and transmitting it through the antenna.

The reception unit receives a reception filter for removing an out-of-receive frequency from a signal received through the antenna, a low noise amplifier for low noise amplifying an output signal of the reception filter, and receives the low noise amplified signal according to the traffic amount determined by the controller. It includes a distributor that distributes to the modem.

The controller determines the amount of transmission traffic and the amount of reception traffic, and determines the mode of each modem according to the ratio of the amount of transmission traffic and the amount of reception traffic.

In addition, the control unit allocates different frequency bands to the plurality of modems, and automatically scans the channel with the least interference in the allocated frequency bands and assigns them to each modem.

In addition, the controller determines the amount of traffic to be distributed to each modem based on the number of packets most recently received without error for each modem in consideration of the wireless environment.

In addition, the control unit obtains the goodness of each channel using the number of AP (Access Point) for each channel and the interference signal RSSI, calculates the goodness ratio of each channel for all channels with the total traffic volume and distributes to each modem Decide how much traffic to do.

In addition, the controller controls the output of each modem to adjust the same EIRP.

According to another aspect of the present invention, a method for transmitting traffic by a wireless Ethernet transmission device combined with a plurality of modems, the method comprising the steps of: (a) determining the mode of each modem based on the traffic volume and propagation environment in each direction, (b) determining a channel and traffic amount for each modem so that each modem operates in the determined mode, and performing a transmission or reception operation according to each modem according to a switching signal. Is provided.

In the step (b), when the modems operate in full duplex according to the determined mode, selecting channels in the order of good channel scan results and assigning them to each transmission modem in order, and determining the traffic volume of the transmission modems. And allocating remaining channels except for the channels allocated to the transmission modems as channels of a reception modem, wherein the transmission modem and the reception modem simultaneously transmit or receive the corresponding traffic at the same timing according to the switching signal. And modems using adjacent channels perform the same mode operation of transmission or reception at the same timing.

The traffic volume of the transmission modems is obtained based on the number of packets most recently received without error for each transmission modem.

In addition, the traffic volume of the transmission modems is obtained by using the number of AP (Access Point) for each channel and the interference signal RSSI to calculate the goodness of each channel, and calculates the goodness ratio of each channel for all channels with the total traffic volume It was saved.

In addition, when the modems operate in half duplex according to the determined mode in the step (b), selecting and assigning channels to the modems in order of good channel scan result, traffic to be distributed to each modem. Determining and allocating a quantity, and performing, by the modem, transmitting or receiving only the distributed traffic at the same timing according to the switching signal.

As described above, according to the present invention, in the wireless Ethernet transmission apparatus in which a plurality of modems are combined, interference between modems may be eliminated, and transmission and reception synchronization may be performed.

In addition, it is possible to implement a solution capable of high-capacity wireless transmission by eliminating performance degradation factors that may occur when low-cost wireless LAN modems are combined.

In addition, when the transmission and reception occur at the same time, the frequency can be automatically arranged so that different modems can use frequencies in the separated bands without using adjacent channel frequencies.

1 is a view showing a conventional 5GHz wireless Ethernet transmitter.
2 is a view schematically showing the configuration of a wireless Ethernet transmission apparatus according to the present invention.
3 is a flowchart illustrating a method for transmitting traffic by a wireless Ethernet transmission apparatus in which a plurality of modems are combined according to the present invention.

Details of the above-described objects and technical configurations of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

2 is a view schematically showing the configuration of a wireless Ethernet transmission apparatus according to the present invention.

Referring to FIG. 2, the wireless Ethernet transmission apparatus 200 transmits a plurality of modems 220a, 220b, 220n, hereinafter referred to as 220, and a transmission signal from a transmission modem to modulate or demodulate a transmission signal or a reception signal. Transmitting unit 230 for transmitting through the antenna 260, receiving unit 240 for transmitting a signal received through the antenna 260 to the corresponding reception modem, and controls the components of the wireless Ethernet transmission device 200 The controller 210 and a switch 250 for switching each modem to perform a transmission or reception operation according to a switching signal from the control unit 210.

The plurality of modems 220 operate as a transmission modem or a reception modem according to a mode determined by the controller 210 to modulate the transmission signal or to demodulate the reception signal.

That is, in the case of a modem whose mode determined by the controller 210 is a transmission mode, the modem converts a digital transmission signal from the controller 210 into an analog form and transmits the analog signal to the transmitter 230.

In addition, in the case of a modem whose mode determined by the controller 210 is a reception mode, the modem converts the received signal of the analog form from the receiver 240 into a digital form and transmits it to the controller 210.

In other words, the plurality of modems 220 operate in Full Duplex or Half Duplex depending on the mode determined by the controller 210.

When the modems operate in full duplex, at least one of the plurality of modems operates as a transmitting modem and at least one as a receiving modem. At this time, the modems using the adjacent channel receive the switching signal for performing the same operation from the control unit 210 at the same timing to perform the same operation of transmission or reception.

In addition, when the modems operate in half duplex, the plurality of modems operate only as a transmission modem or only as a reception modem at the same timing.

The transmitter 230 couples a transmission signal from a transmission modem, amplifies the coupled signal, and transmits the signal through the antenna 260. The transmitter 230 includes a combiner 232 and an amplifier 234. do.

The combiner 232 couples the transmission signals from each modem. That is, the combiner 232 combines the traffic transmitted distributed from the transmission modems.

The amplifier 234 amplifies and outputs the signal coupled by the combiner 232 through the antenna 260.

The receiving unit 240 removes the out-of-receive band frequency from the signal received through the antenna 260 to low noise amplification, and distributes the low noise amplified signal to each receiving modem according to the traffic amount determined by the control unit 210. do.

The receiver 240 that performs the above role includes a reception filter 242, a low noise amplifier 244, and a divider 246. The reception filter 242 removes an out-of-receive band frequency from a signal received through the antenna 260 and transmits it to the low noise amplifier 244. That is, the reception filter 242 serves to prevent saturation due to the transmission signal by removing the out-of-reception band frequency from the reception signal.

The low noise amplifier 244 low noise amplifies the output signal of the receive filter 242 and transmits it to the divider 246.

The distributor 246 distributes the low noise amplified signal to each receiving modem according to the traffic amount determined by the controller 210.

The controller 210 determines a mode of each modem based on the traffic volume and the radio wave environment in each direction, and allocates a frequency band and a channel in the frequency band to operate each modem in the determined mode. At this time, the control unit 210 controls to perform the same operation of transmission or reception by applying a switching signal for performing the same operation for the modems using the adjacent channel at the same timing.

That is, the controller 210 determines the total amount of transmission traffic and the amount of reception traffic, and scans channels for each modem to identify available channels. Then, the controller 210 determines each modem as a transmission modem or a reception modem according to the ratio of the transmission traffic amount and the reception traffic amount, and allocates the corresponding traffic to the determined transmission modem or reception modem. At this time, the control unit 210 obtains the goodness of each channel by using the number of AP (Access Point) for each channel and the interference signal RSSI, and calculates the goodness ratio of each channel for all channels with the total traffic amount Determine how much traffic to distribute to the modem.

For example, if the amount of traffic to be transmitted is X, and as a result of the channel scan, the number of APs for each channel (Y) and the interference signal RSSI (Z) are present, the controller 210 determines that aY + bZ (a, b is To obtain the goodness level of each channel. Then, the controller 210 divides the total traffic X by the sum of the goodness levels of the obtained total channels, and distributes the total traffic X to each modem. In this case, since the control unit 210 distributes the transmission mainly, and it is difficult to accurately predict the transmitter in the case of reception, it is assumed that there is a large amount of received traffic when there are many ACKs based on the ACK signal at the previous timing. If a channel is allocated and there are few ACKs, it is assumed that there is little traffic, and a channel with low goodness is allocated.

In addition, the controller 210 allocates different frequency bands to each modem having a determined mode, and automatically scans a channel having the least interference in the allocated frequency band and assigns the modem to each modem. In this case, the controller 210 allocates each modem to use different frequency bands that are not adjacent to each other in the 5 GHz band while simultaneously performing transmission / reception.

In other words, the control unit 210 allocates a frequency band and a channel so that different modems use channels in bands that are separated without using adjacent channel frequencies when transmission and reception occur simultaneously. This is to avoid transmission and reception acting as mutual interference when transmission and reception occur simultaneously in adjacent channels.

For the method in which the control unit 210 allocates channels, the channel scan results are f1, f2, .... fn in order of good channels, and the weight factors indicating channel goodness are w1, w2, ... wn, A case in which the amount of traffic to be transmitted is T and the amount of traffic expected to be received is R will be described as an example.

If only transmission traffic exists at a particular timing, the controller 210 allocates f1 having the best channel scan result to the first modem, and transmits T * w1 / (w1 + w2 + ... + wn) as transmission traffic. ). The controller 210 allocates channel f2 to the second modem, T * w2 / (w1 + w2 + ... + wn) as the transmission traffic, and channel fn to the nth modem, and T * wn / (as the transmission traffic. w1 + w2 + ... + wn). In this case, the weight factor is obtained by combining the received signal strength obtained as a result of scanning the entire frequency band and the number of different APs, and determines that the total sum is one.

Next, when the transmission traffic and the reception traffic simultaneously exist at a specific timing, the controller 210 first distinguishes how to allocate the entire modem according to the ratio of T and R.

That is, if the number of transmit mode modems is x, the total number of modems is n, and the number of receive mode modems is y, the control unit 210 expresses a relational expression of (T: R = x: y (where x + y = n)). Find x and y using.

Then, the controller 210 assigns different channels to the x transmit modems. That is, the control unit 210 selects x in order of the channels having the highest scan result among the channels, and has w1, w1, ... wx, which are goodness levels of the selected channels. Get ..w`x In other words, the control unit 210 is w`1 = w1 / (w1 + w2 + ... + wx), w`2 = w2 / (w1 + w2 + ... + wx), w`x = wx Find the goodness of each channel as / (w1 + w2 + ... + wx).

Then, the control unit 210 assigns the channel f1 having the best channel scan result to the transmission modem 1, and assigns T * w`1 / (w`1 + w`2 + .. + w`x) as transmission traffic. Assign, f2 to the second transmit modem, T * w`2 / (w`1 + w`2 + ... + w`x) as the send traffic, fx to the x send modem and T * w`x / (w`1 + w`2 + ... + w`x)

As described above, the controller 210 allocates different channels and traffic to the x transmit modems.

Then, the controller 210 allocates the channels fn-x to fn for the remaining y modems among all the modems and operates in the reception mode.

By the above method, the control unit 210 allocates a frequency band and a channel so that different modems use frequencies in the bands which are not used instead of adjacent channel frequencies when transmission and reception occur at the same time.

In addition, the controller 210 determines the amount of traffic to be distributed to each modem based on the number of packets most recently received without errors for each modem in consideration of a wireless environment. That is, the controller 210 determines the amount of traffic to be distributed to each modem by allocating a large amount of traffic to the modem having the most packets received without error most recently.

In addition, the control unit 210 transmits traffic in synchronization with the transmission and reception of all modems, and generates a switching signal so that the switch 250 can also switch in accordance with the synchronization to each modem 220 and the switch 250 Is authorized.

In addition, the controller 210 controls the output of each modem to adjust the same effective isotropically radiated power (EIRP). That is, since the wireless Ethernet transmitter 200 uses the same antenna and there is a difference in antenna gain in each frequency band, the controller 210 must control the output of each modem to adjust the same EIRP. The EIRP refers to a final output radiated into free space by summing up both the antenna port output and the antenna gain, and the controller 210 controls the output for each modem because there is a difference in the antenna gain in each frequency band. Adjust to the same EIRP.

Hereinafter, the operation of the controller 210 will be described by taking the wireless Ethernet transmitter 200 using the 5 GHz unlicensed band as an example.

Considering the 5 GHz frequency band, the wireless Ethernet transmitter 200 may combine up to four modems. In this case, four 40 MHz band channels are automatically found and configured in the B band (5.35 ~ 5.45), C band (5.45 ~ 5.65), and D band (5.75 ~ 5.85) to configure transmission and reception. In use, the control unit 210 controls the switching signal so as not to transmit and receive at the same time.

When used to simultaneously transmit and receive two channels in the same band, the transmission signal may interfere with the received signal, causing quality degradation.

In order to prevent this, the same band-use modems must synchronize transmission and reception. For this purpose, the controller 210 buffers the traffic itself, and then controls other modems to transmit traffic when one modem transmits timing.

For example, N modems are distributed in three bands of B, C, and D bands, and modems using each channel are B1, B2, .., Bn, C1 ... Cn, and D1..Dn. In this case, the case where transmission and reception are simultaneously performed will be described.

Modem (B1, B2, .... Bn) assigned to the B band occurs between the transmission and reception, and if a large amount of traffic transmission and reception is requested at the same time rather than the ACK signal, between modems of the B band, C band, D band The transmission and reception may occur separately.

In addition, antenna gains in the B, C, and D bands are different. Since the same antenna must be used, the EIRP must be adjusted to fit. In the D-band point-to-point communication can be used 20dBi, but when using the B, C band should use 6dBi, the modem using the B, C band is controlled by the control unit 210 to reduce the output by 14dB.

That is, in case of using 5.725 ~ 5.825GHz band among 5GHz band, 20dBi antenna can be used for point-to-point communication, and 6dBi antenna should be used like other bands for point-to-multipoint communication. The antenna is hardware and cannot be dynamically adjusted during operation, so adjust the output so that the entire EIRP is the same. For example, if a channel scan shows that a modem selects one of the channels from 5.725 to 5.825 GHz, and has one terminal to service, it is transmitting a point-to-point of 10mW / MHz, which is the original output. In the case of 20-6 = 14dBi, the output is automatically reduced and transmitted.

As a result, the wireless Ethernet transmitter 200 configured as described above is a device capable of freely switching between full duplex and half duplex. When transmission / reception occurs at the same time, different modems do not use adjacent channel frequencies to separate frequencies. Adjust to use.

The wireless Ethernet transmitter 200 refers to a device installed between a base station and a user terminal.

3 is a flowchart illustrating a method for transmitting traffic by a wireless Ethernet transmission apparatus in which a plurality of modems are combined according to the present invention.

Referring to FIG. 3, the wireless Ethernet transmission apparatus determines modes of modems based on traffic volume and propagation environment in each direction (S302), and whether the modems operate in full duplex or half duplex according to the determined mode. Determine (S304).

In operation S304, the wireless Ethernet transmission apparatus allocates a frequency band and a channel in the frequency band so that each modem operates in the determined mode. Here, the operation in the full duplex means that transmission and reception occur at the same time. In order to avoid transmission and reception from interfering with each other, the wireless Ethernet transmitter has different modems without using adjacent channels. Allocate frequency bands and channels to use channels.

After performing the step S306, the wireless Ethernet transmission apparatus determines the amount of traffic to be distributed for each modem (S308), and distributes traffic to each modem according to the determined traffic amount (S310). At this time, the wireless Ethernet transmitter determines the amount of traffic to be distributed to each modem based on the number of packets received without error most recently for each modem in consideration of a wireless environment.

In addition, the wireless Ethernet transmission apparatus obtains the goodness of the channels allocated to the modems, and determines the amount of traffic to be distributed to each modem based on the sum of goodnesses of all the obtained channels and goodness of the corresponding channel.

When the S310 is performed, the wireless Ethernet transmission apparatus simultaneously transmits or receives the corresponding traffic according to the applied switching signal (S312). In this case, when there are modems using the adjacent channel, the wireless Ethernet transmitter controls the modems using the adjacent channel to perform the same operation of transmission or reception at the same timing.

If it is determined in S304 that the device operates in half duplex (S312), the wireless Ethernet transmitter allocates a frequency band and a channel in the frequency band to operate each modem in the determined mode (S314). Here, the operation in the half duplex means a case where only transmission or reception is performed at the same timing.

After performing the step S314, the wireless Ethernet transmitter determines the amount of traffic to be distributed to each modem based on the number of packets most recently received without error for each modem (S316), and determines the amount of traffic to each modem according to the determined traffic amount. Distributing traffic (S318).

Then, the wireless Ethernet transmitter performs an operation of transmitting or receiving only the distributed traffic by each modem according to an applied switching signal (S320).

By the above method, a wireless Ethernet transmitter having a plurality of modems combined can eliminate interference between modems and synchronize transmission and reception.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

As described above, the wireless Ethernet transmission device of the present invention and the traffic transmission method in the device eliminate the performance degradation that may occur when the low-cost wireless LAN modem is combined to enable high-capacity wireless transmission, and simultaneous transmission and reception occur. This is appropriate when there is a need to automatically place frequencies so that different modems can use frequencies in the distant band without using adjacent channel frequencies.

100, 200: wireless Ethernet transmission device 110, 220: modem
120, 234: amplifier 130, 250: switch
140, 260: antenna 150, 244: low noise amplifier
210: control unit 232: combiner
242: receiving filter 246: distributor

Claims (16)

A plurality of modems that operate as a transmission modem or a reception modem to modulate or demodulate a transmission signal or a reception signal;
A transmitter for coupling a transmission signal from a transmission modem, amplifying the coupled signal and transmitting the signal through an antenna;
A receiver which removes an out-of-receive band frequency from a signal received through the antenna to low noise amplification and distributes the low noise amplified signal to each receiving modem according to a traffic amount determined by a controller;
Modes of each modem are determined using the traffic volume and propagation environment in each direction, and the channel and the traffic volume are determined for each modem to operate each modem in the determined mode, and the same timing is used for modems using adjacent channels. A controller for applying a switching signal to perform a mode operation; And
A switch for switching each modem to perform a transmit or receive operation according to a switching signal from the controller;
Wireless Ethernet transmission device comprising a. The method of claim 1,
And the plurality of modems operate in full duplex or half duplex according to a mode determined by the controller. The method of claim 2,
When the modems operate in full duplex, at least one of the plurality of modems operates as a transmitting modem, at least one as a receiving modem, and a switching signal for allowing modems using adjacent channels to perform the same mode operation at the same timing. Wireless Ethernet transmission apparatus characterized in that the same operation of the transmission or reception is received from the control unit. The method of claim 2,
When the modems operate in half duplex, the plurality of modems operate only as a transmission modem or only as a reception modem at the same timing. The method of claim 1,
The transmitter may include: a combiner configured to receive and couple the traffic transmitted from each transmission modem; And
And an amplifier for amplifying the coupled signal and transmitting the same through the antenna. The method of claim 1,
The receiver may include: a reception filter which removes an out-of-receive frequency from a signal received through the antenna; And
A low noise amplifier for low noise amplifying the output signal of the reception filter; And
And a splitter for distributing the low noise amplified signal to each receiving modem according to the traffic amount determined by the controller. The method of claim 1,
The controller determines the amount of transmission traffic and the amount of reception traffic, and determines the mode of each modem according to the ratio of the amount of transmission traffic and the amount of reception traffic. The method of claim 1,
The control unit allocates different frequency bands to the plurality of modems, and automatically scans a channel having the least interference in the allocated frequency bands and assigns the same to each modem. The method of claim 1,
The controller determines the amount of traffic to be distributed to each modem based on the number of packets most recently received without error for each modem in consideration of a wireless environment. The method of claim 1,
The control unit calculates the goodness of each channel by using the number of AP (Access Point) for each channel and the interference signal RSSI, and calculates the goodness ratio of each channel with respect to all channels with the total traffic volume to distribute to each modem. A wireless Ethernet transmission device, characterized in that for determining the amount. The method of claim 1,
And the controller controls the output of each modem to adjust the same EIRP to be the same. In the method of transmitting traffic by a wireless Ethernet transmission device combined with a plurality of modems,
(a) determining the modes of the modems based on the amount of traffic in each direction and the propagation environment; And
(b) determining a channel and traffic amount for each modem so that each modem operates in the determined mode, and performing each transmission or reception operation according to each switching signal;
Traffic transmission method in a wireless Ethernet transmission device comprising a. The method of claim 12,
In the step (b)
When the modems operate in full duplex according to the determined mode, selecting channels in order of good channel scan result and assigning them to each transmission modem in order;
Determining and allocating traffic amounts of the transmission modems;
Allocating a channel other than the channels allocated to the transmission modems as a channel of the reception modem; And
And simultaneously transmitting or receiving the corresponding traffic at the same timing by the transmission modem and the reception modem according to the switching signal.
Modem using the adjacent channel performs the same mode operation of transmission or reception at the same timing. The method of claim 13,
The amount of traffic of the transmission modems is calculated based on the number of packets most recently received without error for each transmission modem. The method of claim 13,
The traffic volume of the transmission modems is obtained by calculating the goodness of each channel using the number of APs (Access Points) and the interference signal RSSI for each channel, and calculating the goodness ratio of each channel with respect to all channels with the total traffic volume. Traffic transmission method in a wireless Ethernet transmission device characterized in that. The method of claim 12,
In the step (b)
When the modems operate in half duplex according to the determined mode, selecting channels in order of good channel scan result and assigning them to each modem in order;
Determining and allocating the amount of traffic to be distributed to each modem; And
And transmitting or receiving only the distributed traffic at the same timing by each modem according to the switching signal.

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