KR101171630B1 - Intelligent interference avoidance method and apparatus for mobile service set - Google Patents

Intelligent interference avoidance method and apparatus for mobile service set Download PDF

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KR101171630B1
KR101171630B1 KR1020110030768A KR20110030768A KR101171630B1 KR 101171630 B1 KR101171630 B1 KR 101171630B1 KR 1020110030768 A KR1020110030768 A KR 1020110030768A KR 20110030768 A KR20110030768 A KR 20110030768A KR 101171630 B1 KR101171630 B1 KR 101171630B1
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channel
ap
mode
method
mobile terminal
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Korean (ko)
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나웅수
박래혁
이건우
조성래
조용수
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중앙대학교 산학협력단
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management, e.g. wireless traffic scheduling or selection or allocation of wireless resources
    • H04W72/12Dynamic Wireless traffic scheduling ; Dynamically scheduled allocation on shared channel
    • H04W72/1205Schedule definition, set-up or creation
    • H04W72/1242Schedule definition, set-up or creation based on precedence or priority of the traffic information
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access, e.g. scheduled or random access
    • H04W74/08Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance

Abstract

PURPOSE: An intelligent interference avoidance method for a mobile service cell and an apparatus thereof are provided to intelligently use other channels within a range where a mobile terminal is able to control channels. CONSTITUTION: When a contention section(906,910) exists, a mobile terminal confirms a channel share frame. When a channel occupation frame is not received from a specific access point(AP), the mobile terminal searches for an AP using a Wi-Fi network(912,914). If the AP found in the search does not correspond to an AP existing in a channel C, the mobile terminal switches from a current channel to a next channel(916,918).

Description

Intelligent interference avoidance method and apparatus for mobile service set

The present invention relates to a wireless LAN system for a vehicle, and relates to an apparatus and a method for performing intelligent interference avoidance through competition between basic service sets (BSS).

Currently, the wireless terminal for WiMAX / Wibro has a problem that the communication quality is deteriorated due to the deterioration of the signal sensitivity at the cell boundary and the shadow area. In order to solve these problems, many researches are being conducted. These studies aim to improve the communication quality by increasing the signal reception sensitivity using the internal antenna for WiMAX / Wibro. Here, the user terminal receives high quality WiMAX / Wibro service through an internal antenna and a WiFi interface. However, when a large number of vehicles are concentrated, the communication efficiency is expected to decrease due to interference between WiFi networks.

As described above, the present invention provides a device for avoiding interference between mobile BSSs for providing a Wifi service in a vehicle by mounting a built-in antenna of a mobile vehicle to use the services such as WiMAX / Wibro in an optimized communication environment. And methods.

According to an embodiment of the present invention, the method may further include obtaining a priority according to a traffic vector and a traffic amount of a vehicle including an AP connecting at least one mobile terminal, and determining whether a channel occupied frame is present according to the priority. And if the channel occupancy frame does not exist, calculating a network throughput according to a moving parameter, and performing the channel occupancy mode in a contention mode or a avoidance mode according to the operation result.

The performing of the channel mode may include transmitting a corresponding channel frame to a mobile terminal when the channel occupancy frame exists, and transmitting data through the channel when receiving an ACK signal from the mobile terminal. .

In the channel occupancy mode, the data throughput rate in the contention mode and the data throughput rate in the switching mode may be calculated, respectively, and the channel gain mode may be performed as the channel occupation mode.

Data throughput of the switching mode (

Figure 112011024379135-pat00001
)silver
Figure 112011024379135-pat00002
It is calculated by applying the following equation. E [T F ] is a single channel occupation time, and T D is a data transmission time.

The data throughput of the contention mode (

Figure 112011024379135-pat00003
c ) may be calculated by the following equation.

Figure 112011024379135-pat00004

The T A is a time point out of the interference distance range with the occupied AP in the channel, T S is a superframe period, T C is a contention mode interval,

Figure 112011024379135-pat00005
Is the sum of the AP's own traffic and the AP's traffic

The channel occupancy mode may perform a contention mode when the sum of the traffic amount according to the connected mobile device and the traffic amount of the AP occupying the channel is less than or equal to the maximum traffic amount.

The movement parameter may be a distance between the vehicle including the AP and the vehicle including the AP using the same channel calculated in the direction and the distance traveled after a predetermined time.

The separation distance between the vehicles may be calculated by applying the following equation.

Figure 112011024379135-pat00006

-remind

Figure 112011024379135-pat00007
Is the coordinate of the location information of the vehicle i,
Figure 112011024379135-pat00008
Is the location coordinate of vehicle j,
Figure 112011024379135-pat00009
Is the direction vector of vehicle i,
Figure 112011024379135-pat00010
Is the moving vector of vehicle j

In addition, the method according to an embodiment of the present invention comprises the steps of checking whether the AP connected to the communication exists in the competition section; Confirming whether a channel occupied frame is received during the contention period, if the content is present in the contention period; If the channel occupation frame is received, transmitting data through a corresponding channel.

Searching for an AP through a WLAN if the channel occupation frame is not received; Determining whether the found AP exists in a reference channel; As a result of the determination, if the found AP exists in the reference channel, the method may include transmitting data through the corresponding channel.

In addition, an apparatus according to an embodiment of the present invention includes a communication unit for connecting at least one mobile terminal; And a control unit for acquiring a priority according to the traffic amount of the mobile terminal connected to the communication unit, collecting movement parameters of the vehicle, and controlling a channel occupancy mode in a competition mode or avoidance mode according to the priority or movement parameters. .

The controller may compare the traffic amount of at least one mobile terminal connected to the communication unit with the traffic amount of the mobile terminal connected to the AP using the same channel to obtain priority in the order of the upper traffic amount.

 The controller may calculate the data throughput in the contention mode and the data throughput in the switching mode to control the channel gain mode to be performed in the channel occupancy mode.

The controller may control to perform a contention mode when the sum of the traffic amount according to the connected mobile device and the traffic amount of the AP occupying the channel is less than or equal to the maximum traffic amount.

The control unit obtains a movement parameter based on a distance at which the vehicle including the AP moves after a predetermined time and a distance from the vehicle including the AP using the same channel calculated in the direction.

In addition, an apparatus according to an embodiment of the present invention connects at least one mobile terminal, obtains a priority according to the traffic amount of the mobile terminal, collects a moving parameter of the vehicle, and competes according to the priority or parameter. Or an AP controlling the channel occupation mode in the avoidance mode; And a mobile terminal connected to the AP and transmitting and receiving data for a predetermined time through a corresponding channel according to the presence of a channel occupancy frame received from the AP in a contention period.

The AP may obtain a priority according to the traffic amount of the mobile terminal.

The AP may calculate a data throughput rate in the contention mode and a data throughput rate in the switching mode, and perform the mode in which the gain of the throughput is higher as the channel occupancy mode.

As described above, the present invention can avoid interference by using different channels intelligently within the interferenceable range in the mobile mobile terminal.

1 is a diagram illustrating a section interference topology between vehicles using the same channel according to an exemplary embodiment of the present invention.
2 is an exemplary view of a vehicle equipped with an antenna to which an embodiment of the present invention is applied.
3 is a configuration diagram of an AP to which an embodiment of the present invention is applied.
4 is a diagram illustrating a structure of a superframe according to an embodiment of the present invention.
5 is an exemplary diagram of a priority competition section according to an embodiment of the present invention.
6 is an exemplary channel synchronization diagram according to an embodiment of the present invention.
7 illustrates an example of channel usage in a competition section according to an embodiment of the present invention.
8 is a flowchart illustrating an interference avoiding operation of an AP according to an embodiment of the present invention.
9 is a flowchart illustrating an interference avoiding operation of a mobile terminal according to an exemplary embodiment of the present invention.

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

1 is a diagram illustrating an interference section topology between vehicles using the same channel according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the network configuration changes frequently because vehicles on the road are very mobile. Therefore, the interference topology between BSSs frequently changes. When there are a plurality of vehicles traveling in the same direction, the interference interval between the BSSs becomes long. According to an embodiment of the present invention, priorities of APs of the vehicle are determined, and the channels are occupied according to the priorities. In the example shown in FIG. 1, each of the BSS # 1, # 2, and # 3 may include at least one AP and a plurality of terminals.

If there are APs of a vehicle having the same priority, any one AP may occupy a channel through periodic channel occupancy competition.

2 is an exemplary view of a vehicle to which an embodiment of the present invention is applied.

Referring to FIG. 2, a vehicle to which an embodiment of the present invention is applied includes a mobile device as a WiMAX terminal node.

WLAN (Wifi) in the vehicle synchronizes via WiMAX / Wibro connected to the gateway. In addition, a motion parameter including location information and a velocity vector can be obtained from the navigation in the vehicle.

Position information of the vehicle (l i) is the Y coordinate of the X-coordinate of α i and β i (α i, β i ) in the form of It can be represented as a two-dimensional vector.

The motion vector of the vehicle may also be represented by a two-dimensional vector. For example, the motion vector m i of AP i C , which is an AP that uses the i-th channel C, may be represented as (γ i , δ i ).

3 is a block diagram of an AP according to an embodiment of the present invention.

Referring to FIG. 3, an AP according to an exemplary embodiment of the present invention includes a communication unit 110 and a control unit 120. The AP shown in FIG. 3 may be an intelligent interference avoiding device according to an embodiment of the present invention.

The communication unit 110 connects at least one mobile terminal or a fixed terminal. That is, the communication unit 110 may transmit and receive data with the terminals in the vehicle.

The controller 120 may obtain the priority according to the traffic amount of the mobile terminal connected to the communication unit 110. The priority may be determined by the amount of traffic generated according to an operation mode of each of the mobile terminals connected through the communication unit 110. The control unit 120 gives a higher priority as the traffic amount increases.

The controller 120 collects moving parameters such as a speed, a moving direction, and a moving distance of the vehicle through a device such as a navigation in the vehicle. The controller 120 controls to select and operate a mode for occupying the data transmission channel according to the obtained priority and the moving parameter.

4 is a diagram illustrating a structure of a superframe according to an embodiment of the present invention.

Referring to FIG. 4, a superframe includes a contention section and a data transmission section for each channel. Competition section is divided into competition section and tiebreaking contention phase. The data transmission section is represented by T D, and the contention section is represented by T C.

The total length of the superframe is denoted by T S. In the priority competition period, the AP attempts to occupy a channel frame to transmit data. The AP waits for a Contention Window (CW) corresponding to its priority and then transmits data in the data transmission section (T D ).

The AP enables the mobile terminal to transmit and receive data through the occupied channel and receives an ACK signal upon completion of data transmission through the mobile terminal.

5 is an exemplary diagram of a priority competition section according to an embodiment of the present invention.

The AP sets a contention window (CW) according to its priority level.

For example, as shown in FIG. 5, when vehicle A has priority level 4 (CW = 4) and vehicle B has priority level 6 (CW = 6), vehicle A has a high priority, thus occupying transmission frame of B. Faster than Therefore, the vehicle B stops the frame occupation operation in accordance with the frame occupation of the vehicle A.

Table 1 below is an exemplary table showing the priority level according to the traffic amount of the AP.

Priority Traffic amount One 4.5Mbps or more 2 4.0 to 4.5 Mbps 3 3.5 to 4.0 Mbps 4 3.0 to 3.5 Mbps 5 2.5 to 3.0 Mbps 6 2.0 to 2.5 Mbps 7 1.5 to 2.0 Mbps 8 1.5Mbps or less

In the example of Table 1, when the number of priority levels is eight, the priority level according to the traffic amount is shown. As described above, the APs may store information on a preset priority level according to the amount of traffic in the BSS.

6 is an exemplary channel synchronization diagram according to an embodiment of the present invention.

Referring to FIG. 6, the AP and the mobile terminal are synchronized through a Wibro / WiMAX device connected to the AP, and follow the structure of FIG. 6.

T superframe refers to the length of the entire superframe , and Tc is defined as the total length of the competition section. Each channel of the superframe structure as shown in FIG. 6 is synchronized. The superframe is configured such that the contention section of the next channel 1 starts immediately after θ time after the contention section of channel 0. Therefore, the BSS group that competed in channel 0 repeats the dispute in channel 1 immediately after θ time. Through repeated competition, the channel increases usability. The BSS group occupying the channel transmits data for T D time and repeats the competition when the T C interval is reached.

7 illustrates an example of channel usage in a competition section according to an embodiment of the present invention.

Referring to FIG. 7, as a criterion for determining a competition mode and an avoidance mode according to an embodiment of the present invention, the competition group and the avoidance group are divided in consideration of a vehicle's mobility vector and traffic volume.

The competition group uses the same channel as the occupied BSS or. If interference is very small due to the direction or speed difference, or if the amount of traffic in the BSS is small, coexistence in the channel is possible.

The competition mode is determined when the following conditions are satisfied.

First, when the traffic transmission of the occupied BSS is corrected, the sum of the traffic amount (TRF my ) of the BSS and the traffic amount (TRF occupancy ) of the BSS occupied the channel should be less than or equal to the maximum traffic amount.

Condition1: TRF my + TRF occupancy ≤ MAX_Traffic

Secondly, if the expected channel occupancy time has more channel gains than the expected interference termination time, it operates in a contention mode.

Condition2:

Figure 112011024379135-pat00011

Figure 112011024379135-pat00012

Figure 112011024379135-pat00013
Denotes a set of APs using channel i within a communication range of AP i c .

In Condition2, AP i c continuously measures its traffic volume and distributes the traffic volume of AP i c to channel occupied frames. That is, Equation 1 performs the competition mode when the maximum traffic amount is less than or equal to the sum of the traffic amount of its BSS using channel i and the amount of BSS occupying the channel.

Figure 112011024379135-pat00014
Is the network throughput (or maximum bandwidth), which is the expected throughput for the switching mode (
Figure 112011024379135-pat00015
) Is the network throughput (
Figure 112011024379135-pat00016
Occupy part of The actual data rate can be expressed as Equation 2 below.

Figure 112011024379135-pat00017

T F Is the time when the leader AP can start data transmission as the leader AP from the continuation of the competition interval for searching for the next channel to AP i c time. That is, T F can be considered as a search time to be a leader AP.

The T F may be calculated by Equation 3 below.

Figure 112011024379135-pat00018

In [Equation 3] above

Figure 112011024379135-pat00019
silver
Figure 112011024379135-pat00020
Can be calculated by
Figure 112011024379135-pat00021
Is the number of priority levels. That is, the calculated
Figure 112011024379135-pat00022
[Equation 3] using
Figure 112011024379135-pat00023
Becomes

Therefore, the expected throughput of AP i c in the competition mode may be calculated by Equation 4 below.

Figure 112011024379135-pat00024

T A is the time until no interference occurs as the leader AP deviates from AP i c . If T A is greater than or equal to T S , AP i c moves to channel C when the leader AP ends in superframe, and AP i c uses channel C until the end of the superframe. However, if T A is less than T S , the leader AP uses channel C from the interference range of AP i c to the point of departure of the leader AP. AP i c uses channel C until the end of the superframe.

Figure 112011024379135-pat00025

Figure 112011024379135-pat00026
The
Figure 112011024379135-pat00027
Is measured continuously. And
Figure 112011024379135-pat00028
Moves to the channel occupied frame.

T A is the direction vector of AP i c and denoted by AP j c

Figure 112011024379135-pat00029
And location information
Figure 112011024379135-pat00030
Calculate using After t hours, the AP i c position is
Figure 112011024379135-pat00031
And the position of AP j c is
Figure 112011024379135-pat00032
to be. Therefore, the distance between AP i c and AP j c can be calculated after t hours.

Figure 112011024379135-pat00033

Based on motion vector

Figure 112011024379135-pat00034
Wow
Figure 112011024379135-pat00035
Calculate the distance between. For example, if the leader AP is far away (
Figure 112011024379135-pat00036
Outside of the interference range)
Figure 112011024379135-pat00037
Wow
Figure 112011024379135-pat00038
The distance is farther away. d t is
Figure 112011024379135-pat00039
Wow
Figure 112011024379135-pat00040
Is the critical distance that is not affected.

Therefore, T A is calculated by Equation 7 below.

Figure 112011024379135-pat00041

Values in Equation 7 are given constant values except d t . In addition, when d t is the interference possible distance, it is assumed that the interference possible distance after t time does not cause interference after t time.

8 is a flowchart illustrating an interference avoiding operation of an AP according to an embodiment of the present invention.

An interference avoiding operation of the AP using the above-described equation will be described with reference to FIG. 8.

Figure 112011024379135-pat00042
In step 802, if turned on in step 804,
Figure 112011024379135-pat00043
Is synchronized in the WiMAX super frame region.
Figure 112011024379135-pat00044
In step 806, it is determined whether to perform an operation for avoiding movement sensing interference in the occupying channel c.

Figure 112011024379135-pat00045
If the determination result is not present in the competition section, the standby mode is performed until the competition section starts in step 808. On the other hand
Figure 112011024379135-pat00046
Is present in the competition section, in step 810
Figure 112011024379135-pat00047
The priority is determined according to the traffic amount of the mobile terminal registered in. In this case, the traffic amount of the mobile terminal may be the total traffic amount in the BSS, the traffic amount of the largest amount of the mobile terminals, or may be a traffic amount determined according to an operation mode such as voice or data transmission and reception. That is, the traffic amount of the mobile terminal is a value that can be determined on a variety of criteria depending on the implementation form.

Figure 112011024379135-pat00048
In step 812, a contention window (CW) is determined according to the priority, and according to the CW according to the priority
Figure 112011024379135-pat00049
Will perform channel occupancy.

Figure 112011024379135-pat00050
In step 814, it is determined whether a channel occupation frame exists during CW.
Figure 112011024379135-pat00051
If there is a channel occupation frame according to the determination result of step 814, the corresponding channel occupation frame is transmitted in step 834. In step 836, it is determined whether an ACK signal is received, and in step 838, if the ACK signal is not received, whether the transmitted channel occupation frame is included in a priority contention period.

Figure 112011024379135-pat00052
If it is included in the priority competition section, the operation operates in the standby mode in step 840 until the non-competition section starts and randomly sets the CW in step 842. In step 814, it is determined whether a channel occupation frame exists according to the randomly set CW.

On the other hand, if there is no channel occupied frame during CW in step 814, in step 816

Figure 112011024379135-pat00053
Updates the traffic volume λ k for the connected mobile terminal. If the maximum traffic amount exceeds the sum of the traffic volume of the BSS and the traffic volume of the BSS occupying the corresponding channel in step 818 (
Figure 112011024379135-pat00054
)
Figure 112011024379135-pat00055
Is a moving parameter
Figure 112011024379135-pat00056
And update to E [T F ], T A ,
Figure 112011024379135-pat00057
,
Figure 112011024379135-pat00058
Calculate

In step 824

Figure 112011024379135-pat00059
If so,
Figure 112011024379135-pat00060
In step 826, the competition mode is selected, and in step 828, data is transmitted through the channel C during T D.

Whereas in step 824

Figure 112011024379135-pat00061
If the conditions in are not met
Figure 112011024379135-pat00062
In operation 830, the switch mode switches to the switching mode.

9 is a flowchart illustrating an interference avoiding operation of a mobile terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 9, when the mobile terminal approaches the AP with the power turned on in step 902, the mobile terminal performs synchronization in the superframe section of WiMAX in step 904.

When the synchronization is completed, the mobile terminal determines whether it is a competition section in step 906. If it is determined that the competition section is not in operation 908, the operation mode is operated until the competition section starts.

On the other hand, in the case of a competition section, the mobile terminal checks the channel occupied frame in step 910. In step 912, the mobile terminal determines whether there is a channel occupation frame received from the AP during the contention period.

If the mobile terminal does not receive the channel occupancy frame from the specific AP, the mobile terminal searches for the AP through Wifi in step 914.

When the AP is found in step 914, the mobile terminal determines whether it exists in channel C (reference channel) in step 916. As a result of the determination, if the searched AP exists in channel C, data is transmitted through channel C during T D in step 920.

On the other hand, if the AP found in step 914 is not an AP existing in channel C, the mobile terminal switches to the next channel in step 918.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Claims (18)

  1. Obtaining a priority according to a traffic vector and a traffic amount of a vehicle including an AP connecting at least one mobile device;
    Determining whether a channel occupation frame exists according to the priority;
    Calculating a network throughput rate according to a movement parameter if the channel occupation frame does not exist;
    Performing a channel occupation mode in a contention mode or an avoidance mode according to the operation result;
    Intelligent interference avoidance method comprising a.
  2. The method of claim 1,
    Transmitting the channel frame to the mobile terminal when the channel occupation frame exists;
    When receiving an ACK signal from the mobile terminal, transmitting data through the channel;
    Intelligent interference avoidance method comprising a.
  3. The method of claim 1,
    Performing the channel occupancy mode is
    Computing the data throughput in the competitive mode and the data throughput in the switching mode, respectively, to perform a mode in which the gain of the throughput is higher than the channel occupancy mode.
    Intelligent Interference Avoidance Method.
  4. The method of claim 3,
    Data throughput of the switching mode (
    Figure 112011024379135-pat00063
    )silver
    Calculated by applying the following equation
    Intelligent Interference Avoidance Method.
    Figure 112011024379135-pat00064

    E [T F ] is a single channel occupation time, and T D is a data transmission time.
  5. The method of claim 3,
    The data throughput of the contention mode (
    Figure 112011024379135-pat00065
    c ) is
    Calculated by applying the following equation
    Intelligent Interference Avoidance Method.
    Figure 112011024379135-pat00066

    - wherein T A is the time of leaving the AP occupies the interference distance range in the channel, T S is a super-frame period, T C is a competition mode interval,
    Figure 112011024379135-pat00067
    Is the sum of the AP's own traffic and the AP's traffic.
  6. The method of claim 1,
    The channel occupancy mode is
    If the sum of the traffic amount according to the connected mobile device and the traffic amount of the AP occupying the channel is less than the maximum traffic amount, the competition mode is performed.
    Intelligent Interference Avoidance Method.
  7. The method of claim 1,
    The moving parameter is
    Distance between the vehicle including the AP including the AP using the same channel calculated in the direction and the distance traveled after a predetermined time the vehicle including the AP
    Intelligent interference avoidance method characterized in that.
  8. The method of claim 7, wherein
    The separation distance between the vehicles
    Calculated by applying the following equation
    Intelligent Interference Avoidance Method.
    Figure 112011024379135-pat00068

    -remind
    Figure 112011024379135-pat00069
    Is the coordinate of the location information of the vehicle i,
    Figure 112011024379135-pat00070
    Is the location coordinate of vehicle j,
    Figure 112011024379135-pat00071
    Is the direction vector of vehicle i and the movement vector of vehicle j
  9. Checking whether the AP to which the communication is connected exists in a contention period;
    Confirming whether a channel occupied frame is received during the contention period, if the content is present in the contention period; And
    If the channel occupation frame is received, transmitting data through a corresponding channel;
    Intelligent Interference Avoidance Method.
  10. 10. The method of claim 9,
    Searching for an AP through a WLAN if the channel occupation frame is not received;
    Determining whether the found AP exists in a reference channel;
    As a result of the determination, if the found AP exists in the reference channel, data is transmitted through the corresponding channel.
    Intelligent Interference Avoidance Method.
  11. A communication unit connecting at least one mobile terminal; And
    A controller for acquiring a priority according to the traffic amount of the mobile terminal connected to the communication unit, collecting movement parameters of the vehicle, and controlling a channel occupancy mode in a competition mode or avoidance mode according to the priority or movement parameters;
    Intelligent interference avoidance device comprising a.
  12. The method of claim 11,
    The control unit
    Comparing the traffic amount of at least one mobile terminal connected to the communication unit with the traffic amount of the mobile terminal connected to the AP using the same channel to obtain priority in order of the upper traffic amount;
    Intelligent Interference Avoidance Device.
  13. The method of claim 11,
    The control unit
    The data throughput in the competitive mode and the data throughput in the switching mode are calculated to control the mode in which the gain of the throughput is higher than that of the channel occupancy mode.
    Intelligent Interference Avoidance Device.
  14. The method of claim 11,
    The control unit
    If the sum of the traffic amount according to the connected mobile device and the traffic amount of the AP occupying the channel is less than or equal to the maximum traffic amount, controlling to perform a contention mode
    Intelligent Interference Avoidance Device.
  15. The method of claim 11,
    The control unit
    Obtaining a movement parameter by the distance from the vehicle including the AP using the same channel calculated in the distance and direction traveled by the vehicle including the AP after a predetermined time
    Intelligent Interference Avoidance Device.
  16. Connecting at least one mobile terminal, acquiring a priority according to the traffic amount of the mobile terminal, collecting a moving parameter of the vehicle, and controlling a channel occupancy mode in a competition mode or avoidance mode according to the priority or parameter An AP; And
    A mobile terminal connected to the AP and transmitting and receiving data for a predetermined time through a corresponding channel according to the presence of a channel occupancy frame received from the AP in a contention period.
  17. The method of claim 16,
    The AP is
    Obtaining priority according to the traffic amount of the mobile terminal;
    Intelligent Interference Avoidance System.
  18. The method of claim 16,
    The AP calculates the data throughput in the contention mode and the data throughput in the switching mode, and performs a mode in which the gain of the throughput is higher as the channel occupancy mode.
    Intelligent Interference Avoidance System.
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