JPWO2017022444A1 - Terminal device, communication method and program - Google Patents

Abstract

The terminal device detects communication between the communication unit connected to the first network using the first frequency band or the second frequency band, and communication of the second network performed using the second frequency band. And a control unit that causes the communication unit to stop using the second frequency band when a detection result of the detection unit satisfies a predetermined interference avoidance condition.

Description

The present invention relates to a terminal device, a communication method, and a program.
This application claims priority on August 4, 2015 based on Japanese Patent Application No. 2015-154228 for which it applied to Japan, and uses the content here.

  With the increase in data communication demand, use of LAA (License Assisted Accessing LTE) is being studied in order to improve communication speed and communication efficiency. LAA is a communication method that uses LTE (Long Term Evolution, LTE is a registered trademark) using an unlicensed band. LTE is a standard that speeds up data communication of third generation (3G) mobile phones, and is also called 3.9G.

  When a base station that uses LAA detects the presence of another network that uses an unlicensed band, for example, wireless LAN communication, wireless LAN (Local Area Network) communication is performed so as not to cause radio wave interference. It is necessary to communicate by avoiding the frequency band used by. For this reason, when detecting the radio wave interference between the LAA and the wireless LAN communication, the wireless device described in Patent Literature 1 requests a handover to the base station of the LAA and changes the frequency band used by the LAA. Accordingly, the wireless device performs communication in a frequency band that does not interfere with radio LAN communication and radio waves.

Special table 2013-535139 gazette

  By the way, when the wireless LAN access point detects deterioration of communication quality, the wireless LAN access point may spontaneously change the frequency band to be used to restore the communication quality. However, when the wireless device already uses the frequency band after the wireless LAN access point is changed, it may occur that radio wave interference occurs and the recovery of the communication quality of the wireless LAN communication is hindered.

  Some aspects of the present invention have been made in view of the above points, and provide a terminal device, a communication method, and a program capable of performing communication while making it difficult to prevent recovery of communication quality of wireless LAN communication.

(1) Some aspects of the present invention have been made to solve the above-described problems. As one aspect of the present invention, the first frequency band or the second frequency band is used as the first frequency band. A communication unit for communication connection to the network, a detection unit for detecting communication of the second network performed using the second frequency band, and a detection result of the detection unit satisfies a predetermined interference avoidance condition In this case, the terminal device includes a control unit that causes the communication unit to stop using the second frequency band.

(2) Moreover, as one aspect of the present invention, the interference avoidance condition is to detect that an identifier for identifying an access point of the second network corresponds to a specific identifier. Terminal device.

(3) Further, according to one aspect of the present invention, the interference avoidance condition includes radio wave interference between radio waves in the second frequency band and radio waves in the second network in communication connection to the first network. The terminal device according to (1), which is to be detected.

(4) Further, as one aspect of the present invention, a communication step of performing communication connection to the first network using the first frequency band or the second frequency band, and using the second frequency band A detection step for detecting communication of the second network, and a control step for stopping the use of the second frequency band in the communication step when a detection result in the detection step satisfies a predetermined interference avoidance condition. And a communication method.

(5) Moreover, as one aspect of the present invention, a communication step of connecting to a first network using the first frequency band or the second frequency band and a second frequency band are used for the computer. When the detection step of detecting the communication of the second network and the detection result in the detection step satisfy a predetermined interference avoidance condition, the use of the second frequency band is stopped in the communication step. And a control step for executing the program.

  According to some aspects of the present invention, communication can be performed while preventing the recovery of communication quality of wireless LAN communication from being hindered.

It is the schematic which shows an example of a structure of the communication system which concerns on this embodiment. It is a block diagram which shows an example of a structure of the terminal device in the communication system which concerns on this embodiment. It is a figure which shows an example of a structure of the registration SSID list | wrist in the communication system which concerns on this embodiment. It is a flowchart which shows an example of operation | movement of the terminal device in the communication system which concerns on this embodiment. It is the schematic which shows an example of a structure of the communication system which concerns on the modification of this embodiment.

(Embodiment)
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating an example of a configuration of a communication system according to the present embodiment.
The communication system 1 includes a terminal device 10 (10-1, 10-2), a wireless LAN terminal 11, a first communication base station 21, a second communication base station 22, and a wireless LAN access point 23. Composed.

  The terminal device 10 (10-1, 10-2) is a terminal device compatible with LTE communication (first network), which is compatible with the LAA communication method. The terminal device 10 (10-1, 10-2) can detect an access point by receiving a radio wave transmitted from an access point for wireless LAN communication (second network). The terminal device 10 (10-1, 10-2) is configured by, for example, a smartphone, a tablet terminal, or a personal computer.

The wireless LAN terminal 11 is a terminal device that supports wireless LAN communication. The wireless LAN terminal 11 is configured by, for example, a smartphone, a tablet terminal, or a personal computer.
The 1st communication base station 21 is a communication base station apparatus connected by communication with the terminal device 10 (10-1, 10-2) by LTE communication using a license band (1st frequency band).
The 2nd communication base station 22 is a communication base station apparatus connected by communication with the terminal device 10 (10-1, 10-2) by LTE communication using a license unnecessary band (2nd frequency band).

  The 1st communication base station 21 and the 2nd communication base station 22 are comprised by eNodeB (evolved Node B), for example. The eNodeB is a radio base station that supports LTE radio communication. The license band is a frequency band that can be used after being authorized by the authority, and the license-unnecessary band is a frequency band (for example, 5 MHz band) that can be used without requiring permission from the authority.

  As described above, the terminal devices 10 (10-1, 10-2) can support the LAA communication method. Note that LAA (or LTE-U) is a communication system that performs LTE or LTE-Advanced (LTE-A) communication using a license-free band that is also used in wireless LAN communication or the like. As of May 2015, the introduction of LAA is under consideration in the standardization project “3GPP (3rd Generation Partnership Project)” of mobile communication systems, and discussions are being made to be included in the release target “Release 13” in March 2016. Has been made.

  LAA is assumed to be used in combination with LTE communication using a license band. When the communication using the license unnecessary band is possible while maintaining the LTE communication using the license band, the LAA uses the line using the license band and the line using the license unnecessary band. Realization of so-called “carrier aggregation” is made possible.

  The wireless LAN access point 23 is a device that is connected to the wireless LAN terminal 11 by wireless LAN communication. The wireless LAN access point 23 is configured by, for example, a wireless LAN router. Note that the wireless LAN communication is connected using a license-free band.

  The license-free band used by the second communication base station 22 and the license-free band used by the wireless LAN access point 23 include a common frequency band (for example, 5 GHz band). Accordingly, LTE communication by the second communication base station 22 and wireless LAN communication by the wireless LAN access point 23 may use the same frequency band at the same time. In that case, since radio wave interference may occur, it is necessary to prevent the same frequency band from being used at the same time.

  In FIG. 1, the cell formed by the first communication base station 21 is a cell A21. A cell is a range covered by a communication base station. Therefore, the terminal devices 10-1 and 10-2 located in the cell A21 can be connected to the first communication base station 21 by LTE communication using the license band.

  Similarly, the cell formed by the second communication base station 22 is the cell A22. Therefore, the terminal devices 10-1 and 10-2 located in the cell A22 can be connected to the second communication base station 22 by LTE communication (LAA) using a license-free band. Specifically, the first communication base station 21 forms an LAA primary cell (Primary Cell; PCELL), and the second communication base station 22 corresponds to the primary cell, and the LAA secondary cell (Secondary Cell; SCELL). The primary cell here is a cell in which data communication and control information communication are performed. The secondary cell is a cell in which data communication is performed using control information communicated in the primary cell. For example, the primary cell and the secondary cell are an LTE-A primary cell and a secondary cell, respectively. The second communication base station 22 forms a secondary cell using a license-free band.

  The range covered by the wireless LAN access point 23 is the wireless LAN area A23. The wireless LAN terminal 11 located in the wireless LAN area A23 can be connected to the wireless LAN access point 23 by wireless LAN communication. The wireless LAN access point 23 is connected to the wireless LAN terminal 11 using a license-free band (for example, 5 GHz band) as in the second communication base station 22.

  As shown in FIG. 1, the terminal device 10-1 is located in the cell A21 and the cell A22 and is located outside the wireless LAN area A23. The terminal device 10-1 bundled LTE communication using a license band by communication connection with the first communication base station 21 and LTE communication using a license-free band by communication connection with the second communication base station 22. LAA communication can be performed.

  As shown in FIG. 1, the terminal device 10-2 is located in the cell A21 and the cell A22 and located in the wireless LAN area A23. As described above, the terminal device 10 (10-1, 10-2) can detect an access point for wireless LAN communication, and the terminal device 10-2 detects the wireless LAN access point 23. When the terminal device 10-2 detects an access point for wireless LAN communication, the terminal device 10-2 disables the function of performing LAA communication in order to avoid radio wave interference. That is, the terminal device 10-2 performs only LTE communication using a license band by communication connection with the first communication base station 21, and LTE communication using a license-free band by communication connection with the second communication base station 22. Do not do. As a result, the terminal device 10-2 can avoid radio wave interference between the LTE communication and the wireless LAN communication due to the license-free band.

(Configuration of terminal device)
Next, the configuration of the terminal device 10 (10-1, 10-2) will be described in detail.
FIG. 2 is a block diagram illustrating an example of a configuration of the terminal device according to the present embodiment.
The terminal device 10 includes a communication unit 100, a control unit 110, a storage unit 120, a display unit 130, and an operation input unit 140.

The communication unit 100 performs communication connection with the first communication base station 21 and the second communication base station 22, detection of an access point for wireless LAN communication, and the like. The communication unit 100 includes an LTE processing unit 101, an LTE-RF unit 102, an LAA processing unit 103, an LAA-RF unit 104, a wireless LAN processing unit 105, and a wireless LAN-RF unit 106. Is done.
The control unit 110 controls various operations of the terminal device 10. The control unit 110 includes an LAA invalidation control unit 111 and a timer control unit 112.

The LTE processing unit 101 transmits / receives various data to / from the first communication base station 21 using the LTE communication method via the LTE-RF unit 102 and the antenna.
The LTE-RF unit 102 is an intermediate frequency signal indicating data input / output between the LTE processing unit 101 and the LTE-RF unit 102, and a high frequency input / output between the antenna and the LTE-RF unit 102. Convert frequency signal.

The LAA processing unit 103 transmits and receives various data to and from the second communication base station 22 using the LAA communication method via the LAA-RF unit 104 and the antenna.
The LAA-RF unit 104 is an intermediate frequency signal indicating data input / output between the LAA processing unit 103 and the LAA-RF unit 104, and a high frequency input / output between the antenna and the LAA-RF unit 104. Convert frequency signal.

The wireless LAN processing unit 105 (detection unit) attempts to detect surrounding wireless LAN communication access points periodically (for example, at intervals of 10 seconds) via the wireless LAN-RF unit 106 and the antenna. The wireless LAN processing unit 105 outputs a detected SSID list that is a list of SSIDs (Service Set Identifiers) of each detected access point to the LAA invalidation control unit 111 described later. Note that the wireless LAN processing unit 105 outputs an empty detected SSID list to the LAA invalidation control unit 111, which will be described later, even when no SSID is acquired.
The wireless LAN-RF unit 106 converts a high frequency signal input from the antenna into an intermediate frequency signal indicating the SSID, and outputs the signal to the wireless LAN processing unit 105.

  The LAA invalidation control unit 111 controls invalidation processing of the LAA communication function. Specifically, the LAA invalidation control unit 111 invalidates the LAA communication function by stopping the power supply to the LAA processing unit 103 and the LAA-RF unit 104. Note that the method of disabling the LAA communication function may be a method other than the method of stopping the power supply. For example, the method of disabling the LAA communication function may be a method of disabling the communication function by software control, or a method of disabling the communication function by physically switching off.

  The storage unit 120 stores in advance a registered SSID list that is a list of wireless LAN SSIDs. The registered SSID list is a list in which SSIDs corresponding to access points of wireless LAN communication that may cause radio wave interference with LAA communication are listed. Details of the configuration of the registered SSID list will be described later. The storage unit 120 is a storage medium, for example, a hard disk drive (HDD; Hard Disk Drive), a flash memory, an EEPROM (Electrically Erasable Programmable Read Only Memory), a ROM (Read Only Memory) (ROM). read / write Memory (read / write memory), or any combination thereof.

  The display unit 130 displays various information. The display unit 130 includes a display, such as a liquid crystal display or an organic electroluminescence (EL) display.

The operation input unit 140 receives various operation inputs from the user of the terminal device 10. The operation input unit 140 includes an operation input member such as an operation button or a keyboard.
The SSID registered in the registered SSID list is registered, for example, when the user of the terminal device 10 inputs it via the operation input unit 140 while referring to the display unit 130.

  The LAA invalidation control unit 111 compares the SSID included in the detected SSID list acquired from the wireless LAN processing unit 105 with the SSID included in the registered SSID list stored in the storage unit 120. When at least one SSID that matches the SSID included in the registered SSID list is included in the detected SSID list, the LAA invalidation control unit 111 supplies power to the LAA processing unit 103 and the LAA-RF unit 104. Stop. When the SSID that matches the SSID included in the registered SSID list is not included in the detected SSID list, the LAA invalid control unit 111 will describe an undetected signal indicating that the corresponding SSID has not been detected. Output to the timer control unit 112.

As described above, the wireless LAN processing unit 105 periodically detects surrounding wireless LAN communication access points and outputs the detection result (detected SSID list) to the LAA invalidation control unit 111.
After the LAA invalidity control unit 111 invalidates the LAA communication function, when the SSID that matches the SSID included in the registered SSID list is not included in the detected SSID list, the LAA invalidation control unit 111 activates the LAA communication function. Return to the valid state again.

  However, the SSID may not be temporarily acquired for some reason, such as when reception of radio waves is unstable due to the terminal device 10 being positioned around the outer edge of the wireless LAN area A23. Therefore, when the SSID that matches the SSID included in the registered SSID list is not included in the detected SSID list for a certain time (for example, 1 minute) or longer, the LAA invalidation control unit 111 performs the LAA communication function. It is preferable to return to a valid state again.

  The timer control unit 112 functions as a timer that measures the predetermined time. Specifically, the timer control unit 112 stores a timer activation flag. The timer is activated when the timer activation flag is switched from “off” to “on”. The timer ends when a certain time (for example, 1 minute) elapses.

When the non-detection signal is acquired from the LAA invalidity control unit 111, the timer control unit 112 sets the timer activation flag to “on” if the LAA communication function is invalid and the timer activation flag is “off”. In addition, when the timer control unit 112 acquires an undetected signal from the LAA invalid control unit 111, if the LAA communication function is invalid, the timer activation flag is “on”, and the timer has expired, Switch the timer start flag to “off”.
When the timer start flag is switched to “off”, the timer control unit 112 outputs a timer end signal indicating the end of the timer to the LAA invalid control unit 111. When the LAA invalidation control unit 111 acquires a timer end signal from the timer control unit 112, the LAA invalidation control unit 111 enables the LAA communication function again. That is, the LAA invalidation control unit 111 starts power supply to the LAA processing unit 103 and the LAA-RF unit 104 again.
Note that the above-described fixed time may not be provided (that is, the fixed time may be 0 seconds).

(Configuration of registered SSID list)
Next, the configuration of the registered SSID list will be described in detail.
FIG. 3 is a diagram showing an example of the configuration of the registered SSID list according to the present embodiment.
As shown in the figure, the registered SSID list is a two-dimensional table format table composed of columns of three items “No.”, “character string”, and “search type”. Each row of the registered SSID list represents an SSID matching condition. The item “No.” may not be present, and the registered SSID list may be a table in which at least “character string” and “search type” are associated with each other. For example, the registered SSID list may be a two-dimensional tabular table composed of two item columns of “character string” and “search type”.

In the item “No.”, a number assigned to identify each matching condition is stored. In the item “character string”, part or all of the character string of the SSID is stored. The item “search type” stores a search rule for a character string.
For example, the value of each item in the first line of the registered SSID list is “No. 1”, “AAA001”, and “perfect match”. That is, the first line of the registered SSID list indicates that the condition is that the SSID character string completely matches “AAA001”. The third line of the registered SSID list indicates that the condition is that the SSID character string matches “BBB” in front. Thus, the matching condition of the SSID character string is not limited to the condition that the SSID included in the detected SSID list and the SSID included in the registered SSID list are “completely matched”, but “forward match” and “backward match”. , “Include (specific) character string”, “does not include (specific) character string”, or the like.

(Receiver operation)
Next, the operation of the terminal device 10 will be described.
FIG. 4 is a flowchart illustrating an example of the operation of the terminal device according to the present embodiment.
This flowchart is started when the wireless LAN processing unit 105 attempts to detect an access point for surrounding wireless LAN communication.

(Step S101) The wireless LAN processing unit 105 completes the detection of the access point for wireless LAN communication, and outputs the detected SSID list to the LAA invalidation control unit 111. Then, it progresses to step S102.

(Step S <b> 102) The LAA invalidation control unit 111 compares the SSID included in the detected SSID list acquired from the wireless LAN processing unit 105 with the SSID included in the registered SSID list stored in the storage unit 120. If the SSID corresponding to the registered SSID list is included in the detected SSID list, the process proceeds to step S103. Otherwise, the process proceeds to step S107.

(Step S103) The LAA invalidation control unit 111 confirms whether the LAA communication function is valid or invalid. That is, the LAA invalidation control unit 111 confirms whether power is being supplied to the LAA processing unit 103 and the LAA-RF unit 104 or is stopped. If the LAA communication function is valid, the process proceeds to step S104. Otherwise, the process of this flowchart is terminated.

(Step S <b> 104) The control unit 110 confirms whether or not the LAA processing unit 103 is communicating with the second communication base station 22. If communication is in progress, the process proceeds to step S105. Otherwise, the process proceeds to step S106.

(Step S <b> 105) The control unit 110 disconnects communication between the LAA processing unit 103 and the second communication base station 22. Thereafter, the process proceeds to step S106.

(Step S106) The LAA invalidation control unit 111 invalidates the LAA communication function. That is, the LAA invalidation control unit 111 disables the LAA communication function by stopping the power supply to the LAA processing unit 103 and the LAA-RF unit 104. Above, the process of this flowchart is complete | finished.

(Step S107) The LAA invalidation control unit 111 outputs an undetected signal to the timer control unit 112.
The LAA invalidation control unit 111 checks whether the LAA communication function is valid or invalid. That is, the LAA invalidation control unit 111 confirms whether power is being supplied to the LAA processing unit 103 and the LAA-RF unit 104 or is stopped. If the LAA communication function is invalid, the process proceeds to step S108. Otherwise, the process of this flowchart is terminated.

(Step S108) The timer control unit 112 checks whether the timer activation flag is “on” or “off”. If the timer activation flag is “on”, the process proceeds to step S109. Otherwise, the process proceeds to step S112.

(Step S109) The timer control unit 112 checks whether or not the timer has expired.
If the timer has expired, the process proceeds to step S110. Otherwise, the process of this flowchart is terminated.

(Step S110) The timer control unit 112 sets the timer activation flag to “off”. Thereafter, the process proceeds to step S111.

(Step S111) The LAA invalidation control unit 111 enables the LAA communication function. That is, the LAA invalidation control unit 111 enables the LAA communication function by resuming the power supply to the LAA processing unit 103 and the LAA-RF unit 104. Above, the process of this flowchart is complete | finished.

(Step S112) The timer control unit 112 sets the timer activation flag to “on”. Thereafter, the process proceeds to step S113.

(Step S113) The timer control unit 112 starts a timer. Above, the process of this flowchart is complete | finished.

  As described above, the terminal apparatus 10 according to the present embodiment detects an access point for wireless LAN communication that uses a license-free band, and a specific SSID is included in the SSID of the detected access point. Then, the LAA communication function using the license unnecessary band is invalidated. By registering in advance the SSID of a wireless LAN communication access point that may cause radio interference with LAA communication in the registered SSID list as a specific SSID, the terminal device 10 may be less likely to cause radio interference. it can.

  For example, the wireless LAN access point 23 may detect deterioration of communication quality and voluntarily change the frequency band to be used to recover the communication quality. At this time, if the frequency band after the change of the wireless LAN access point 23 is already used between the terminal device 10 and the second communication base station 22, the terminal device 10 disables the LAA communication function. Thus, it is possible to prevent the recovery of the communication quality of the wireless LAN communication.

  As described above, the terminal apparatus 10 according to the present embodiment can perform communication while making it difficult to prevent recovery of communication quality of wireless LAN communication.

(Modification of the embodiment)
Next, a modification of the embodiment of the present invention will be described with reference to the drawings.
FIG. 5 is a schematic diagram illustrating an example of a configuration of a communication system according to a modification of the present embodiment.
The communication system 2 includes a terminal device 10 (10-3, 10-4), a wireless LAN terminal 11, a first communication base station 24, a second communication base station 25, a wireless LAN access point 26, and a wireless LAN. The access point 27 includes a wireless LAN access point 28 and a wireless LAN access point 29.

  The terminal device 10 (10-3, 10-4) is a terminal device compatible with LTE communication (first network) that can also support the LAA communication method. Further, the terminal device 10 (10-3, 10-4) can detect the access point by receiving the radio wave transmitted from the access point of the wireless LAN communication (second network). The terminal device 10 (10-3, 10-4) is configured by, for example, a smartphone, a tablet terminal, or a personal computer.

The wireless LAN terminal 11 is a terminal device that supports wireless LAN communication. The wireless LAN terminal 11 is configured by, for example, a smartphone, a tablet terminal, or a personal computer.
The first communication base station 24 is a communication base station apparatus that is connected to the terminal apparatus 10 (10-3, 10-4) by LTE communication using a license band (first frequency band).
The second communication base station 25 is a communication base station device that is connected to the terminal device 10 (10-3, 10-4) by LTE communication using a license-free band (second frequency band).

  The 1st communication base station 24 and the 2nd communication base station 25 are comprised by eNodeB (evolved Node B), for example.

  The wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 are devices that are connected to the wireless LAN terminal 11 by wireless LAN communication. The wireless LAN access point 23 is configured by, for example, a wireless LAN router. Note that the wireless LAN communication is connected using a license-free band.

  The wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 are access points installed in the building 3 that is a building.

  The license-free band used by the wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 is a frequency band common to the license-free band used by the second communication base station 25 (For example, 5 GHz band) is included. Therefore, the wireless LAN communication by the wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 and the LTE communication by the second communication base station 22 simultaneously have the same frequency band. The use case may occur. In that case, since radio wave interference may occur, it is necessary to prevent the same frequency band from being used at the same time.

  In FIG. 5, the cell formed by the first communication base station 24 is the cell A24. The terminal devices 10-3 and 10-4 located in the cell A24 can be connected to the first communication base station 24 by LTE communication using a license band.

  Similarly, the cell formed by the second communication base station 25 is the cell A25. Therefore, the terminal devices 10-3 and 10-4 located in the cell A25 can be connected to the second communication base station 25 by LTE communication (LAA) using a license-free band. Specifically, the first communication base station 24 forms an LAA primary cell, and the second communication base station 25 forms an LAA secondary cell corresponding to the primary cell. For example, the primary cell and the secondary cell are an LTE-A primary cell and a secondary cell, respectively. The 2nd communication base station 25 forms a secondary cell using a license unnecessary band.

  The ranges covered by the wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 are the wireless LAN area A26, the wireless LAN area A27, the wireless LAN area A28, and the wireless LAN, respectively. Area A29. The wireless LAN terminal 11 located in the wireless LAN area A29 can be connected to the wireless LAN access point 29 by wireless LAN communication. Note that, similarly to the second communication base station 25, the wireless LAN access point 29 is connected to the wireless LAN terminal 11 using a license-free band (for example, 5 GHz band).

  Since the wireless LAN terminal 11 is not located in the wireless LAN access point 26, the wireless LAN access point 27, and the wireless LAN access point 28, the wireless LAN access point 26, the wireless LAN access point 27, and the wireless LAN Communication connection with the access point 28 is not possible.

  As illustrated in FIG. 5, the terminal device 10-3 is located in the cell A24 and the cell A25, and is located outside the wireless LAN area A26, the wireless LAN area A27, the wireless LAN area A28, and the wireless LAN area A29. positioned. The terminal apparatus 10-3 bundled LTE communication using a license band by communication connection with the first communication base station 24 and LTE communication using a license-free band by communication connection with the second communication base station 25. LAA communication can be performed.

  As shown in FIG. 1, the terminal device 10-4 is located in the cell A24 and the cell A25 and is located in the wireless LAN area A26. As described above, the terminal device 10 (10-3, 10-4) can detect an access point for wireless LAN communication, and the terminal device 10-4 detects the wireless LAN access point 26. When the terminal device 10-4 detects an access point for wireless LAN communication, the terminal device 10-4 disables the function of performing LAA communication in order to avoid radio wave interference. That is, the terminal device 10-4 performs only LTE communication using a license band by communication connection with the first communication base station 24, and LTE communication using a license-free band by communication connection with the second communication base station 25. Do not do. Thereby, the terminal device 10-4 can avoid radio wave interference between LTE communication and wireless LAN communication due to a license-free band.

  The terminal device 10-4 can detect the wireless LAN access point 26 that constitutes the wireless LAN area A26 that is in the area, but the wireless LAN access point that constitutes the wireless LAN area A27 that is not in the area. 27, the wireless LAN access point 28 constituting the wireless LAN area A28 and the wireless LAN access point 29 constituting the wireless LAN area A29 cannot be detected.

  As described above, in the modification of the present embodiment, a plurality of wireless LAN access points (wireless LAN access point 26, wireless LAN access point 27, wireless There are a LAN access point 28 and a wireless LAN access point 29).

  Also, it is assumed that the SSIDs of the wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 are all registered in the registered SSID list. The SSIDs of the wireless LAN access point 26, the wireless LAN access point 27, the wireless LAN access point 28, and the wireless LAN access point 29 may be the same SSID or different SSIDs.

  According to the configuration of the communication system 2 according to the modification of the present embodiment, not only does the terminal device 10-4 hardly detect radio wave interference with the wireless LAN communication by the wireless LAN access point 26 that can be detected, but also the terminal Radio interference with wireless LAN communication by wireless LAN access points (that is, wireless LAN access point 27, wireless LAN access point 28, and wireless LAN access point 29) that cannot be detected by device 10-4 may be less likely to occur. it can.

This is because the terminal device 10-4 has a wireless LAN access point to which the SSID registered in the registered SSID list is assigned (that is, wireless communication that may cause radio interference with LAA communication performed by the terminal device 10-4). If at least one wireless LAN access point that performs LAN communication is detected, the terminal device 10-4 disables the function of performing LAA communication in order to avoid radio wave interference.
For this reason, the wireless LAN communication is performed by the wireless LAN access point that cannot be detected by the terminal device 10-4. However, the wireless LAN communication may cause radio interference and LAA communication performed by the terminal device 10-4. However, the terminal device 10-4 can make it difficult for radio interference to occur.

  For example, the terminal device 10-4 existing on the first floor of the building 3 detects the wireless LAN access point 26 installed on the first floor of the building 3. The terminal device 10-4 recognizes that the detected SSID of the wireless LAN access point 26 is an SSID registered in the registered SSID list. For example, the terminal device 10-4 cannot detect the wireless LAN access point 29 installed on the third floor of the building, but disables the function of performing LAA communication by detecting the wireless LAN access point 26. Thereby, the terminal device 10-4 can make it difficult to cause radio wave interference with the wireless LAN communication performed by the wireless LAN access point 29 that cannot be detected.

  For example, the wireless LAN access point 29 may detect deterioration of communication quality and voluntarily change the frequency band to be used to recover the communication quality. At this time, if the frequency band after the change of the wireless LAN access point 29 is already used between the terminal device 10 and the second communication base station 25, the terminal device 10 disables the LAA communication function. Thus, it is possible to prevent the recovery of the communication quality of the wireless LAN communication.

  As described above, the terminal device 10 according to the modification of the present embodiment can perform communication while making it difficult to prevent recovery of communication quality of wireless LAN communication performed by a wireless LAN access point that cannot be detected.

  The embodiment of the present invention has been described in detail above, but the specific configuration is not limited to the above-described one, and various design changes and the like can be made without departing from the scope of the present invention. is there.

  Note that the condition (predetermined interference avoidance condition) for the terminal device 10 to invalidate the LAA communication function is not limited to the condition based on the detection of a specific SSID. For example, the condition for invalidating the LAA communication function may be a condition based on detection of radio wave interference between LAA communication and wireless LAN communication. For example, the control unit 110 may determine the presence / absence of radio wave interference based on a change in radio wave intensity of a radio wave of a license-unnecessary band received by the LAA-RF unit 104, and may invalidate the LAA communication function.

  In addition, you may make it implement | achieve part or all of the terminal device 10 in embodiment mentioned above with a computer. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed.

  Here, the “computer system” is a computer system built in the terminal device 10 and includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system.

  Further, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, a volatile memory inside a computer system that serves as a server or a client may be included that holds a program for a certain period of time. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  Further, the terminal device 10 in the above-described embodiment may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of the terminal device 10 may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to the advancement of semiconductor technology, an integrated circuit based on the technology may be used.

  Some aspects of the present invention can be applied to a terminal device, a communication method, a program, and the like that need to perform communication while making it difficult to prevent recovery of communication quality of wireless LAN communication.

  DESCRIPTION OF SYMBOLS 1 ... Communication system, 2 ... Communication system, 3 ... Building, 10 ... Terminal device (10-1, 10-2, 10-3, 10-4), 11 ... Wireless LAN Terminal, 21 ... 1st communication base station, 22 ... 2nd communication base station, 23 ... Wireless LAN access point, 24 ... 1st communication base station, 25 ... 2nd communication base station , 26 ... Wireless LAN access point, 27 ... Wireless LAN access point, 28 ... Wireless LAN access point, 29 ... Wireless LAN access point, 100 ... Communication unit, 101 ... LTE processing 102: LTE-RF unit 103 ... LAA processing unit 104 ... LAA-RF unit 105 ... Wireless LAN processing unit 106 ... Wireless LAN-RF unit 110 ...・ Control part, 111 ... LA Disable control unit, 112 ... timer control unit, 120 ... storage unit, 130 ... display unit, 140 ... operation input unit

Claims (5)

A communication unit for communication connection to the first network using the first frequency band or the second frequency band;
A detection unit for detecting communication of the second network performed using the second frequency band;
When the detection result of the detection unit satisfies a predetermined interference avoidance condition, the control unit that causes the communication unit to stop using the second frequency band;
A terminal device comprising:   The terminal apparatus according to claim 1, wherein the interference avoidance condition is to detect that an identifier for identifying an access point of the second network corresponds to a specific identifier.   2. The terminal device according to claim 1, wherein the interference avoidance condition is to detect radio wave interference between radio waves in the second frequency band and radio waves in the second network in a communication connection to the first network. . A communication step of communicatively connecting to the first network using the first frequency band or the second frequency band;
A detecting step of detecting communication of the second network performed using the second frequency band;
When the detection result in the detection step satisfies a predetermined interference avoidance condition, a control step of stopping the use of the second frequency band in the communication step;
A communication method comprising: On the computer,
A communication step of communicatively connecting to the first network using the first frequency band or the second frequency band;
A detecting step of detecting communication of the second network performed using the second frequency band;
When the detection result in the detection step satisfies a predetermined interference avoidance condition, a control step of stopping the use of the second frequency band in the communication step;
A program for running

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