TW201906349A - Wireless communication device and method for avoiding radio wave interference - Google Patents

Abstract

The radio communication device of the present embodiment is equipped with a controller for achieving an information acquisition function and a control function. The controller acquires information pertaining to a function of avoiding radio frequency interference with a radar device and is set on the basis of the location and frequency band of the radar device. The controller determines, by using the information acquired by the information acquisition means and location information of the host device, a use frequency that excludes a frequency band in which radio interference with the radar device may occur, as a frequency to be used for radio communication.

Description

Wireless communication device and method for avoiding radio wave interference

Embodiments of the present invention relate to a wireless communication device and a method for avoiding radio wave interference.

In recent years, wireless communication devices such as wireless LANs have continued to increase the frequency of use frequencies for the purpose of large-capacity communication. For this reason, between radio communication devices and radar devices such as meteorological radars, since the frequency bands used by the two overlap, the possibility of radio wave interference is always increasing.

In the past, for example, when a wireless LAN uses a 5 GHz frequency band, this frequency band is also used in a radar device such as a weather radar, and there is a possibility of radio wave interference. As a countermeasure against such radio wave interference, for example, an access point of a wireless LAN generally includes a radio wave interference avoidance function called DFS (Dynamic Frequency Selection).

[Problems to be solved by the invention]

As a countermeasure against radio wave interference, although the DFS function is effective, when the wireless communication device is activated, the DFS function cannot perform transmission for a certain period of time, so the communication function can be in a standby state. In addition, if the DFS function is enabled when the wireless communication device approaches the radar device, the wireless communication device cannot perform transmission but can receive only for a certain period of time, and the communication function may become interrupted.

The occurrence of the standby state and the interrupted state of such a wireless communication device. For example, when a smartphone or a wireless LAN router is used as a wireless communication device to implement a car navigation function with a tablet terminal or the like, inconveniences that cannot be ignored can be incurred to the user . Specifically, when the user is moving in a car or the like, from a certain period of time when the wireless communication device is activated or a certain period of time after the activation, there is a possibility that the car navigation function cannot be used. Furthermore, of course, when the DFS function cannot function effectively, the possibility of radio wave interference between the wireless communication device and the radar device becomes high.

Here, there is a problem that a wireless communication device capable of avoiding a radio wave interference function with a radar device and also preventing a standby state of a wireless communication function or an interruption state of the wireless communication function can be realized. [Means to solve the problem]

The wireless communication device according to this embodiment includes an information acquisition unit and a control unit. The information acquisition unit acquires information on the avoidance function of radio wave interference with the radar device, that is, the information set based on the position and frequency band of the radar device. The control unit uses the information obtained by the information acquisition unit and the position information of the own device as a frequency used for wireless communication, and excludes a frequency that may cause radio wave interference with the radar device, and determines the use frequency. .

According to the wireless communication device of this embodiment, the driving navigation function can be started with no standby time at the time of startup. Further, even when the wireless communication device approaches the radar device, it is possible to avoid a situation in which the driving navigation function is interrupted.

Hereinafter, embodiments will be described with reference to the drawings. [Configuration of Wireless Communication Device] FIG. 1 is a block diagram showing a configuration of a wireless communication device according to this embodiment. The wireless communication device according to this embodiment can be applied to, for example, an access point (AP) of a wireless LAN, a router for a wireless LAN, a smartphone, or the like.

As shown in FIG. 1, the wireless communication device 10 according to this embodiment performs wireless communication with the wireless terminal 15 and is connected to a communication loop 16 such as a public communication loop. The wireless terminal 15 is, for example, a portable information terminal or a communication terminal such as a smartphone or a tablet terminal. The wireless communication device 10 can access the server 17 on the network via the communication loop 16 and, as described later, can receive radar information managed by the server 17.

The wireless communication device 10 includes a controller 11 for realizing a function of avoiding radio wave interference with a radar device, in addition to a configuration (not shown) that realizes a normal wireless communication function. The controller 11 includes a processor and software, and executes a function of generating table information 12 and position information 13 and storing them in a memory (not shown), and a determining unit 14 for determining a function of a frequency of use.

Table information 12 refers to FIG. 2 and FIG. 3 and is described later, and is information for performing an avoidance function of radio wave interference with the radar device. The position information 13 is information indicating the position (coordinates consisting of longitude and latitude) of the wireless communication device 10, that is, the own device. The determination unit 14 excludes frequencies at which radio wave interference with the radar device may occur during the execution of the wireless communication, and determines a frequency that has no influence on radio wave interference to the radar device as the use frequency.

In the present embodiment, the server 17 stores, for example, radar information managed by an international agency, government agency, or industry group, and can provide the radar information in response to an access request from the wireless communication device 10. In addition, the server 17 may provide the radar information to the wireless communication device 10 that has obtained access permission through an authentication process such as a predetermined password. [Functions and Effects of the Embodiment] 形态 Hereinafter, operations of the wireless communication device 10 according to the embodiment will be described with reference to FIGS. 2 to 4.

FIG. 4 is a flowchart illustrating a process performed by the controller 11 of the wireless communication device 10. First, the controller 11 accesses the server 17 via the communication loop 16 and receives (acquires) radar information (step S1). The controller 11 may acquire radar information when the wireless communication device 10 is activated, or may periodically access the server 17 and receive the radar information to save or update the radar information.

The controller 11 uses or processes the radar information received from the server 17, creates a table information 12 and stores it in the memory (step S2). The radar information includes, for example, information indicating the specifications of the radar device (latitude and longitude of the installation position, the center frequency of the use frequency, the frequency bandwidth, the center height of the antenna, the operating elevation range, and the minimum reception sensitivity).

2 and 3 are diagrams showing an example of the table information 12. As shown in FIG. 2, the table information 12 is based on the installation position of the radar device. The coordinates of each mesh / area are defined by dividing the range on the map that has radio wave interference to the radar device and dividing the latitude and longitude by a certain scale width. , And information about the frequency information corresponding to the coordinated use frequency FT.

As shown in FIG. 3, the frequency information 120 corresponds to a mesh / area defined by coordinate information in a frequency band of, for example, 5 GHz using the wireless communication device 10 and the radar device, and indicates the frequency of additional radio wave interference to the radar device, and Information about the frequency of the marker without the influence of radio interference. Among them, the mark "1" is set to indicate the frequency of radio wave interference to the radar device, and the mark "0" is set to indicate the frequency of the radar device without the influence of radio wave interference. Based on the radar information received from the server 17, the controller 11 calculates the frequency of the possibility of radio wave interference with the radar device and the frequency of no radio wave interference with the radar device by using a predetermined calculation formula as frequency information 120. Made.

Then, return to FIG. 4. The controller 11 obtains position information 13 indicating the position (coordinates composed of longitude and latitude) of the device 10 (step S3). Among them, if the controller 11 is, for example, a smart phone that can move from the device 10, the position information detected by the built-in GPS is stored in the memory as the position information 13. If the controller 11 is an AP or a wireless LAN router fixedly installed in the device 10, the controller 11 may obtain the position information set in the memory in advance as the position information 13.

The controller 11 refers to the table information 12 and compares the position of the own device 10 (coordinates formed by longitude and latitude) indicated by the position information 13 with the coordinates of the mesh / area defining the table information 12 (step S4). That is, the controller 11 specifies a mesh / area that matches the position of the device 10.

The controller 11 refers to the frequency information 120 corresponding to the specified coordinates of the mesh / area from the table information 12 and executes a process of determining a use frequency (step S5). That is, among the frequencies of the radio waves transmitted from the position of the own device 10, the controller 11 sets the frequencies that may interfere with the radar device with radio waves as unusable, and determines the usable frequencies. Among them, as shown in FIG. 3, the controller 11 sets the frequency marked “1” from the frequency information 120 corresponding to the coordinates of the mesh / area as a frequency that is likely to interfere with the radio wave of the radar device. On the other hand, the controller 11 determines the frequency of the flag “0” as a frequency having no influence on radio wave interference to the radar device.

The controller 11 sets the unusable frequency and keeps it until the position of the device 10 is changed. Therefore, if the own device 10 is a fixedly installed AP or a wireless LAN router, the controller 11 maintains the unusable frequency as it is. On the other hand, if the self-device 10 is a mobile device such as a smart phone, the controller 11 executes steps S3 to S5 to set the frequency of the possibility of radio wave interference to the radar device due to the change of the position of the self-device 10 as unavailable. The process of determining the usable frequency is repeated.

According to the present embodiment described above, when the wireless communication device 10 is performing wireless communication with the wireless terminal 15, based on the table information 12 and the position information 13, the frequency of the possibility of radio wave interference to the radar device is made unavailable. Wireless communication is performed at a frequency determined as usable. Therefore, when the respective use frequency bands (for example, 5 GHz) of the radar device and the wireless communication device 10 overlap, the wireless communication device 10 can use the frequencies that may interfere with the radar device as radio frequencies based on the table information 12 and the position information 13 as unusable To set.

Thereby, the wireless communication device 10 can perform wireless communication using a frequency without the influence of radio wave interference with the radar device without using the previous DFS function. In other words, according to this embodiment, the radio wave interference with the radar device can be avoided, and the previous DFS function can be deleted, and the standby state of the wireless communication function or the interruption state of the wireless communication function can be prevented.

In the present embodiment, the wireless communication device 10 is applied to a smartphone or a wireless LAN router connected to the public line, and is effective for a specific example of realizing the driving navigation function using the wireless terminal 15, for example, a tablet terminal. That is, when a smart phone or a wireless LAN router is activated, for example, the driving navigation function can be started with a tablet terminal without a standby time. Further, even if the wireless terminal device 10 approaches the radar device, it is possible to avoid a situation in which the driving navigation function is interrupted.

Furthermore, in recent years, although high-speed wireless communication services such as 4G / LTE (registered trademark) have become popular, most users may not be able to obtain sufficient speed when receiving large-capacity data such as moving images. In this regard, some communication carriers and the like are equipped with a wireless LAN AP in the same manner as the base station, and provide a service for use of the AP free of charge to users of the company. Although these services currently use wireless LANs in the 2.4 GHz band, it is expected that wireless LANs in the 5 GHz band will also be used in the future. In this case, as described above, in order to avoid the occurrence of radio wave interference between radar devices using the same frequency band (here, 5 GHz) as the wireless LAN, the application of this embodiment is effective.

Here, since the wireless LAN AP, which is provided in the same manner as the base station, is intended to be fixed without moving, it is not necessary to have the function of acquiring position information 13 such as GPS embedded in the main body. At this time, a device different from the AP, such as a GPS-equipped position information acquisition device, can be used to obtain coordinate information indicating the latitude and longitude of the set position of the AP, and input it to the AP, thereby providing and obtaining GPS The same function as the position information 13 function. In addition, when such an AP is used outdoors with a large output specification, consideration is also given to mechanisms such as the aforementioned coordinate information and output power and other specification information to be managed by a country's management and supervisory authority, and stored in a server.

In addition, in this embodiment, the wireless communication device 10 includes the radar device based on the radar device using the radar information indicating the specifications of the radar device obtained from the server 17 as information on the avoidance function of radio wave interference with the radar device. The position and frequency table information 12 is structured. Among them, on the server 17 side, if the radar device relationship information equivalent to the table information 12 can be stored and provided, the function of creating the table information 12 of the controller 11 can be eliminated, and the function of the wireless communication device 10 can be simplified. Into. On the server 17 side, the radar device relationship information corresponding to the table information 12 can also be updated in accordance with the update of the radar device specifications. The wireless communication device 10 can access the server 17 and obtain the latest table as necessary. Information 12.

In addition, in this embodiment, when the wireless communication device 10 is, for example, a smart phone, since the general function of obtaining the position information 13 of the device from a GPS or the like is used, a special function for obtaining the position information 13 is not required. As the position information 13 of the own device, when using inaccurate position information such as the base station information of the base station communicating with the smartphone, it is necessary to take this error into consideration and obtain a space limit to determine the unusable frequency. In addition, the frequency of obtaining the position information is low, and the wireless communication device 10 may also have a spatial limit when it is moving at a high speed.

In addition, the table information 12 of the present embodiment has a structure in which a range on a map having radio wave interference with a radar device is divided into each mesh / area and coordinate information is defined. Based on such coordinate information, it is possible to specify the range of the avoidance function for radio wave interference with the radar device. However, there are cases where the present embodiment is used in a foreign country or the like, and it is not possible to specify a range capable of avoiding radio wave interference. Here, when the self-device 10 is outside the range capable of adapting to the avoidance function of radio wave interference, for example, it instructs to turn on the previous DFS function. On the contrary, when it is located within the range of avoidance function adapting to radio wave interference, it includes information indicating that the previous DFS function is turned off This is also possible in Table Information 12. [Modification] FIG. 5 is a block diagram showing a configuration of a modification of the present embodiment. As shown in FIG. 5, this modification is a configuration in which the wireless communication device 10 of the present embodiment is applied to a base station 20 for mobile wireless communication. That is, the base station 20 is configured to connect to the wireless communication device 10 of the present embodiment, that is, to connect to, for example, a router for a wireless LAN, with respect to the base station body 21 in the past.

In the present modification, the wireless terminal 15 such as a smartphone, for example, does not pass through the base station main body 21, but executes, for example, packet data communication via the wireless communication device 10 of this embodiment via a wireless LAN router. At this time, the router for a wireless LAN functions as described above, and can avoid the radio wave interference with the radar device of the present embodiment. It can relay the data communication of the wireless terminal 15 without causing radio wave interference with the radar device.

In addition, in the case of this modification, since the same effect as that of the aforementioned embodiment can be obtained, the description of the effect will be omitted.

Although the embodiment of the present invention has been described, this embodiment is presented as an example only, and is not intended to limit the scope of the present invention. These novel embodiments can also be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. These embodiments and modifications are included in the scope and gist of the invention, as well as the equivalent scope of the invention described in the scope of patent application.

10‧‧‧Wireless communication device

11‧‧‧ Controller

12‧‧‧ Table Information Department

13‧‧‧Location Information Department

14‧‧‧Decision Division

15‧‧‧Wireless terminal

16‧‧‧communication loop

17‧‧‧Server

20‧‧‧Base Station

[FIG. 1] A block diagram for explaining a configuration of a wireless communication device according to the embodiment. [Fig. 2] A diagram showing an example of table information in the same embodiment. [Fig. 3] A diagram showing a specific example of a part of table information in the same embodiment. [Fig. 4] A flowchart for explaining the operation of the wireless communication device in the same embodiment. [FIG. 5] A block diagram for explaining a configuration of a wireless communication device according to a modification of the same embodiment.

Claims (12)

A wireless communication device comprising: information acquisition means for acquiring information on the avoidance function of radio wave interference with a radar device, that is, the aforementioned information set based on the position and frequency band of the radar device; used as a frequency for wireless communication, The control unit that determines the frequency at which the information obtained by the information obtaining unit and the position information of the own device exclude frequencies that may cause radio wave interference with the radar device. The wireless communication device according to claim 1, wherein the information acquisition unit obtains table information as information on the avoidance function of the radio wave interference, and the table information displays each influence of the radio wave interference based on the position of the radar device. The coordinates of the area correspond to frequencies at which radio wave interference with the radar device may occur. The wireless communication device according to claim 2, wherein the table information includes: frequency information corresponding to the frequency at which the coordinates of the respective regions are displayed; the frequency information is a frequency to which a radio wave interference with the radar device is identified, and A structure of a frequency mark that is not affected by the radio wave interference to the radar device. The wireless communication device according to any one of claims 1 to 3, wherein the information acquisition unit includes: a unit that receives radar information indicating a radar specification including a setting position and a use frequency of the radar device from the outside; Means for generating information on the avoidance function of the radio wave interference by the radar information. The wireless communication device according to any one of claims 1 to 3 includes means for generating the position information of the self-device. The wireless communication device according to any one of claims 1 to 3, wherein the control unit sets the frequency band that is likely to cause the radio wave interference to be unavailable and maintained until the position of the self-device is changed; When the position of the self-device is changed, a frequency at which radio wave interference with the radar device may occur is excluded, and then a process of determining a use frequency is performed. A base station for mobile wireless communication includes the wireless communication device according to any one of claims 1 to 3, and mobile wireless communication can be performed via the wireless communication device. A method for avoiding radio wave interference applicable to a wireless communication device is performed: obtaining information about the avoidance function of radio wave interference with a radar device, that is, processing of the foregoing information set based on the position and frequency of the radar device; ； as wireless communication The used frequency uses the obtained information and the position information of the own device to exclude frequencies that may cause radio wave interference with the radar device, and determines the processing of the used frequency. The method for avoiding radio wave interference according to claim 8, wherein the process of obtaining the foregoing information is obtained: The coordinates of each area affected by the radio wave interference and the occurrence of the interference between the radar device and the radar device are displayed based on the position of the radar device. Corresponding table information of the frequency of the possibility of radio wave interference. The method for avoiding radio wave interference according to claim 9, wherein the table information includes: frequency information corresponding to the frequency at which the coordinates of the respective regions are displayed; the frequency information is a frequency to which the radar device is identified as having radio wave interference And a structure of a frequency mark having no influence of radio wave interference on the radar device. The method for avoiding radio wave interference according to any one of claims 8 to 10, wherein the process of obtaining the aforementioned information is performed: 接收 receiving from outside the radar information indicating a radar specification including the installation position and the frequency of the aforementioned radar device Processing that uses the aforementioned radar information to generate information about the avoidance function of the aforementioned radio wave interference. A wireless communication device includes: information acquisition means for acquiring information on the avoidance function of radio wave interference with a radar device, that is, the aforementioned information set based on the position and frequency band of the radar device; as a frequency used for wireless communication, The aforementioned information obtained by the aforementioned information obtaining unit and the position information of the own device determine a control unit which has no radio wave interference to the aforementioned radar device.