JP2019033321A - COMMUNICATION DEVICE, COMMUNICATION DEVICE CONTROL METHOD, AND PROGRAM - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform communication scheduling for a slave station to avoid radio wave interference. A communication device communicates with a first other device using a first wireless communication method in a first cycle designated by the first other device, and a second. Communication with other devices is performed using a second wireless communication method that uses the same frequency band as the frequency band used in the first wireless communication method. When the communication timing by the first wireless communication method and the communication timing by the second wireless communication method overlap, the communication device has the communication timing by the first wireless communication method and the communication by the second wireless communication method. A signal for requesting that the timings do not overlap is transmitted to the first other device. [Selection diagram] FIG. 7

Description

  The present invention relates to a radio communication interference control technique.

  In recent years, various electronic devices are equipped with wireless communication functions such as a wireless LAN (Local Area Network) and Bluetooth (registered trademark), and various services are provided via wireless communication. The number of electronic devices having a wireless communication function is expected to increase in the future, and further improvement of the wireless communication function and performance is desired.

  In view of such a background, IEEE802.11ax has been studied as a standard for improving frequency use efficiency in a wireless LAN. In addition, Bluetooth version 4.0 standardizes BLE (Bluetooth Low Energy) assuming long-time driving with a button battery.

  Both wireless LAN and Bluetooth can use a frequency band of 2.4 GHz band. As described above, when the same frequency band is used for the wireless LAN and Bluetooth, both radio waves interfere with each other, and the communication performance may deteriorate. When a communication device has a wireless LAN communication function and a Bluetooth communication function, antennas for the function are often arranged close to each other. For this reason, for example, when the wireless LAN is in a transmission state when Bluetooth is in a reception state, a wireless LAN signal at a higher level is received by a Bluetooth antenna than a Bluetooth reception signal, and a reception error is likely to occur in the Bluetooth. .

  As a method for avoiding such radio wave interference, Patent Document 1 proposes a technique for operating a wireless LAN and Bluetooth in different time zones. Specifically, in the technique described in Patent Document 1, a communication device having a wireless LAN function and a Bluetooth function operates as a wireless LAN master station and a Bluetooth master station. And the said communication apparatus avoids radio wave interference by polling a wireless LAN slave station and a Bluetooth slave station in different time zones.

JP-A-2005-45330

  In Patent Literature 1, a communication device that operates as a wireless LAN master station and a Bluetooth master station performs scheduling so that radio waves of the wireless LAN and Bluetooth do not interfere with each other. Therefore, there is a problem that the interference avoidance method described in Patent Document 1 cannot be applied to a communication apparatus in which either or both of the wireless LAN function and the Bluetooth function operate as a slave station.

  The present invention has been made in view of the above problems, and an object of the present invention is to perform communication scheduling for a slave station to avoid radio wave interference.

  As a means for achieving the above object, the communication apparatus of the present invention has the following configuration. That is, a first communication device that communicates with a first other device using a first wireless communication method at a first period designated by the first other device. Second communication means for communicating between the communication means and the second other device using the second wireless communication system using the same frequency band as that used in the first wireless communication system And when the communication timing by the first communication means and the communication timing by the second communication means overlap, the first communication means has the communication timing by the first communication means and the second A signal for requesting that the communication timing by the communication means does not overlap is transmitted to the first other device.

  According to the present invention, it becomes possible for a slave station to perform communication scheduling for avoiding radio wave interference.

1 is a schematic diagram of a configuration of a communication system 10. FIG. 1 is a schematic diagram of a configuration of a camera 101. FIG. 5 is a flowchart showing a flow of processing of the camera 101. The figure which shows the example of the communication operation | movement of IEEE802.11ax. The figure which shows the example of the transmission / reception timing of the radio signal of each apparatus in the time of S306. The figure which shows the example of the transmission / reception timing of the radio signal of each apparatus after completion of S308. The figure which shows the example of the transmission / reception timing of the radio signal of each apparatus after completion of S310. The sequence chart which shows the flow of a process of a role change.

  Hereinafter, the present invention will be described in detail based on an example of an embodiment with reference to the accompanying drawings. The configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

[First Embodiment]
FIG. 1 shows a schematic diagram of a configuration of a communication system 10 according to the first embodiment. As illustrated, the communication system 10 includes a camera 101, a control terminal 102, an access point (AP) 103, and a server 104. The camera 101 has an IEEE802.11ax (hereinafter, 802.11ax) communication function and a BLE (Bluetooth Low Energy) communication function. The control terminal 102 is a smartphone, for example, and has a BLE communication function. The AP 103 and the server 104 have an 802.11ax communication function.

  The camera 101 is connected to the control terminal 102 based on BLE with low power consumption, and receives remote control such as image data upload and photographing from the control terminal 102. The camera 101 is connected to the AP 103 based on 802.11ax, which consumes more power than BLE, and uploads image data to the AP 103. BLE and 802.11ax communication can use the same frequency band. From the viewpoint of power consumption, the camera 101 may operate so as to stop the 802.11ax communication function except when uploading image data to the server 104.

  The BLE communication is communication between the central BLE master station and the peripheral BLE slave station, and is performed at every period determined by the central (connInterval). In this embodiment, the camera 101 operates as a peripheral that is a BLE slave station, and the control terminal 102 operates as a central that is a BLE master station. That is, the camera 101 performs BLE communication at a cycle determined by the control terminal 102. As will be described later, the camera 101 requests the control terminal 102 to change the BLE communication cycle / BLE communication timing so that the 802.11ax communication radio wave and the BLE communication radio wave do not interfere with each other.

  Next, the configuration of the camera 101 will be described with reference to FIG. FIG. 2 is a schematic diagram of the configuration of the camera 101. As illustrated in FIG. 2, the camera 101 includes a control unit 201, a storage unit 202, an imaging unit 203, a user interface (UI) 204, a wireless LAN communication unit 205, and a BLE communication unit 206.

  The control unit 201 includes, for example, one or more processors such as a CPU and MPU, an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and the like. Here, CPU is an acronym for Central Processing Unit, and MPU is an acronym for Micro Processing Unit. The control unit 201 controls the entire camera 101 in cooperation with a program stored in a storage unit 202 described later and the OS. Here, OS is an acronym for Operating System.

  The storage unit 202 includes, for example, both ROM and RAM, or one of them, and stores various information such as a program for performing various operations to be described later and communication parameters for wireless communication. Here, ROM is an acronym for Read Only Memory, and RAM is an acronym for Random Access Memory. As the storage unit 202, in addition to memories such as ROM and RAM, storage media such as flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, CD-Rs, magnetic tapes, nonvolatile memory cards, DVDs, etc. May be used. The storage unit 202 includes, for example, a ROM for storing a control program executed by the control unit 201 and a RAM for use as a work area necessary for executing the control program.

  The imaging unit 203 includes an imaging element such as a CCD sensor or a CMOS sensor and an optical system such as a lens. Here, CCD is an acronym for Charged Coupled Device, and CMOS is an acronym for Complementary Metal Oxide Semiconductor.

  The UI 204 includes an input device such as a button for accepting various operations from the user, and a device for outputting information by a liquid crystal display or voice / vibration for performing various outputs to the user. The UI is an acronym for User Interface. Note that the UI 204 may be configured by a device that realizes both input and output with a single module, such as a touch panel.

  The wireless LAN communication unit 205 has an 802.11ax communication function. The wireless LAN communication unit 205 includes a modulation / demodulation circuit and a radio frequency circuit compliant with the 802.11ax standard, and has a function for operating as a station that is a wireless LAN slave station via the antenna 207.

  The BLE communication unit 206 has a BLE communication function. The BLE communication unit 206 includes a modulation / demodulation circuit and a radio frequency circuit compliant with the BLE standard via an antenna 208, and has a function for operating as a peripheral that is a BLE slave station.

  Subsequently, the flow of processing of the present embodiment executed by the camera 101 will be described with reference to FIGS. FIG. 3 is a flowchart example of processing in which the camera 101 uploads image data to the server 104 from the control terminal 102 by remote control through BLE communication. Each step of FIG. 3 is executed by, for example, the CPU of the control unit 201 of the camera 101 executing a program stored in the storage unit 202.

  In the initial state, it is assumed that the control unit 201 stops power supply to the wireless LAN communication unit 205 and the BLE communication unit 206, and reduces power consumption by stopping these operations. From this initial state, when the user instructs the camera 101 to activate BLE via the UI 204, the control unit 201 starts power supply to the BLE communication unit 206 and activates the BLE communication unit 206 (S301). Subsequently, the control unit 201 instructs the BLE communication unit 206 to start transmitting an advertisement packet (ADV_IND) (S302). In response to this instruction, the BLE communication unit 206 transmits ADV_IND. In the BLE standard, ADV_IND is transmitted by a plurality of channels (37 ch (2402 MHz), 38 ch (2426 MHz), 39 ch (2480 MHz)) for each advertisement event. In the BLE standard, the interval between advertisement events (ADV_IND transmission interval) can be set to an arbitrary value that is a natural number multiple of 625 μsec within a range from 20 ms to 10.24 seconds.

  The control terminal 102 receives ADV_IND and transmits a connection request packet (CONNECT_REQ) to the camera 101 in response to the ADV_IND. Here, the CONNECT_REQ transmission of the control terminal 102 may be performed by an operation on the control terminal 102 by the user. When a user or the like pairs the camera 101 and the control terminal 102 in advance, the control terminal 102 may automatically transmit CONNECT_REQ when receiving the advertisement packet of the camera 101.

  When the control unit 201 detects that the BLE communication unit 206 has received the connection request packet (CONNECT_REQ), the control unit 201 determines that the BLE connection has been established (S303). After the BLE connection is established, the control terminal 102, which is the BLE master station, performs BLE communication for each connection event. The cycle of the connection event (the cycle (connInterval) in which the control terminal 102 transmits a BLE data packet to the camera 101) is specified by the control terminal 102 which is the BLE master station. For example, connInterval is a value specified in the Interval field in CONNECT_REQ transmitted by the control terminal 102. In the BLE standard, it is possible to change connInterval after connection establishment.

  After the BLE connection is established, when the BLE communication unit 206 receives an image data upload instruction from the control terminal 102 (YES in S304), the control unit 201 starts supplying power to the wireless LAN communication unit 205. As a result, the wireless LAN communication unit 205 is activated (S305). The image data upload instruction transmitted from the control terminal 102 includes information such as the SSID of the AP 103 and the IP address of the server 104 that are necessary for the camera 101 to transmit data to the server 104. SSID is an acronym for Service Set IDentifier. Subsequently, the control unit 201 sets the wireless LAN communication unit 205 to the scan state. Thereafter, the wireless LAN communication unit 205 receives the beacon packet transmitted from the AP 103 (step S306).

  Here, the beacon packet will be described. In the present embodiment, the AP 103 operates as an 802.11ax master station that conforms to the 802.11ax standard. The beacon packet transmitted by the AP 103 includes TWT information indicating the medium access timing of the 802.11ax slave station in addition to information related to the beacon transmission cycle (Beacon Interval). TWT is an acronym for Target Wake Time. FIG. 4 shows an example of 802.11ax communication operation using TWT information.

  In the 802.11ax standard, a multi-user operation is defined that increases frequency utilization efficiency by simultaneously transmitting and receiving multiple slave stations by using MU-MIMO or OFDMA. Here, MU-MIMO is an acronym for Multi User Multiple Input Multiple Output, and OFDMA is an acronym for Orthogonal Frequency Division Multiple Access. As shown in FIG. 4, the 802.11ax master station (AP) periodically transmits a beacon packet 401 at a predetermined period, that is, Beacon Interval. The 802.11ax slave stations (STA1, STA2) grasp the start timing of the multiuser operation based on the TWT information (TWT1, TWT2) included in the beacon packet 401 received from the AP.

  As the multi-user operation, an uplink operation and a downlink operation are defined. In uplink operation, in response to receiving the Trigger frame 402 transmitted from the AP after TWT1, STA1 and STA2 transmit data frame 403 simultaneously using MU-MIMO or OFDMA. When the AP successfully receives the data frame 403, the AP transmits an acknowledgment 404. In the downlink operation, the AP transmits a data frame 405 to STA1 and STA2 simultaneously after TWT2. When STA1 and STA2 successfully receive data frame 405, STA1 and STA2 simultaneously transmit acknowledgment 406 using MU-MIMO or OFDMA.

  In the beacon interval, the STA1 and the STA2 operate so as to shift to a low power consumption sleep mode while not receiving a signal from the AP and transmitting a signal from itself. That is, in the period from Sleep 407 to 409 in FIG. 4, STA1 and STA2 enter a sleep state.

  FIG. 5 shows an example of the timing of radio signals transmitted and received by the camera 101, the control terminal 102, and the AP 103 at the time of S306. In FIG. 5, the camera 101 receives a beacon packet 501 transmitted by the AP 103 for each Beacon Interval. On the other hand, the camera 101 exchanges BLE data packets 502 and 503 with the control terminal 102 for each conn interval. Here, in the 802.11ax communication and the BLE communication, the control terminal 102 and the AP 103, which are the master stations, independently determine the communication timing. Therefore, the beacon packet 501 and the BLE data packets 502 and 503 may be transmitted at the same time, and interference may occur. If interference has occurred, the camera 101 needs to continue the scan state until the beacon packet 501 can be normally received, which is inefficient from the viewpoint of power consumption. In the present embodiment, in order to avoid the occurrence of such interference, the control unit 201 of the camera 101 performs the processing after S307 as described below.

  That is, first, the control unit 201 obtains Beacon Interval information and TWT (TWT1, TWT2) information from the received beacon packet 501, and compares contInterval and Beacon Interval. Then, the control unit 201 determines whether or not a difference between N times (N is a natural number) of connInterval and Beacon Interval exceeds a predetermined value (DImax) (S307). In the case of Yes in S307, the control unit 201 determines a connInterval such that the difference between the connInterval and N times the Beacon Interval is equal to or less than a predetermined value (DImax or less). Subsequently, the BLE communication unit 206 requests the control terminal 102 to change the contInterva using the contInterval determined by the control unit 201 (S308). In other words, in the processing of S307 and S308, the control unit 201 operates so that connInterval and Beacon Interval × N are substantially equal.

  Here, the processing of S307 and S308 will be described using a more specific example. The BLE standard defines that connInterval is a value not less than 7.5 ms and not more than 4 s and an integer multiple of 1.25 ms. On the other hand, the 802.11 standard specifies that Beacon Interval is an integer multiple of 1.024 ms. For example, in one example, connInterval = 30 ms (1.25 ms × 24), Beacon Interval = 102.4 ms (1.024 ms × 100), DImax = 500 μs, and N = 1. In this case, in S307, since the difference of N times the contInterval is equal to the Beacon Interval is 72.4 ms, the process proceeds to S308. In step S308, the control unit 201 determines that connInterval = 102.5 ms (1.25 ms × 82) so that the difference between connInterval and N times Beacon Interval is less than or equal to DImax. In response to this, the BLE communication unit 206 makes a contInterval change request to the control terminal 102 at the determined contInterval = 102.5 ms.

  In the BLE standard, a contInterval change request can be made using a connection parameter request packet (LL_CONNECTION_PARAM_REQ). More specifically, the BLE communication unit 206 transmits LL_CONNECTION_PARAM_REQ in which the Interval_Min field and the Interval_Max field are set to 82 (0x52) to the control terminal 102 that is the BLE master station.

  The control terminal 102 receives the contInterval change request (LL_CONNECTION_PARAM_REQ) transmitted from the camera 101. Subsequently, the control terminal 102 responds with a connection update request packet (LL_CONNECTION_UPDATE_REQ).

  When the transmission / reception of the connection parameter request packet (LL_CONNECTION_PARAM_REQ) and the connection update request packet (LL_CONNECTION_UPDATE_REQ) is completed normally, the connInterval is changed to 102.5 ms. The connInterval can be changed at the timing specified in the Instant field of the connection update request packet (LL_CONNECTION_UPDATE_REQ).

  FIG. 6 shows an example of the timing of radio signals transmitted and received by the camera 101, the control terminal 102, and the AP 103 after the processing of S308 is completed. As shown in FIG. 6, after the process of S308 is completed, contInterval and Beacon Interval are substantially matched. At this time, the timing of BLE communication and wireless LAN communication is determined at random, and FIG. 6 shows that BLE communication overlaps with multi-user uplink communication (between TWT1 and TWT2). .

  Returning to FIG. 3, in subsequent S <b> 309, the control unit 201 determines whether or not BLE communication is performed outside the 802.11ax sleep period. In the present embodiment, the control unit 201 determines whether or not the BLE communication is performed outside the sleep period (Sleep 407 in FIG. 4) specified by the 802.11ax TWT1. When it is determined that the BLE communication is performed outside the sleep period (Yes in S309), the control unit 201 sets the BLE communication timing to the sleep period (so as to be located in a period other than the 802.11ax communication timing). BLE communication timing is determined. In response to this, the BLE communication unit 206 makes a BLE communication timing change request at the determined BLE communication timing to the control terminal 102 (S310). In the example of FIG. 3, the requests of S308 and S310 are performed separately, but may be performed together.

  The change request for the BLE communication timing is performed by using a connection parameter request packet (LL_CONNECTION_PARAM_REQ) as in the case of contInterval. It is possible to specify a change in timing by a natural number multiple of 1.25 ms in the Offset field of the connection parameter request packet (LL_CONNECTION_PARAM_REQ).

  When receiving the connection parameter request packet (LL_CONNECTION_PARAM_REQ), the control terminal 102 responds to the request with a connection update request packet (LL_CONNECTION_UPDATE_REQ). Thereby, the BLE communication timing is changed.

  FIG. 7 shows an example of the timing of radio signals transmitted and received by the camera 101, the control terminal 102, and the AP 103 after the processing of S310 is completed. As shown in FIG. 7, the camera 101 and the control terminal 102 are in a state where BLE communication is performed within the sleep period specified by the TWT 1. In the above-described example, since beacon interval = 102.4 ms, and conn interval = 102.5 ms, the BLE communication timing gradually shifts outside the sleep period. Therefore, in the subsequent processes, the camera 101 executes the 802.11ax communication process and the BLE communication timing adjustment process (S311 to S312) in parallel until the 802.11ax communication process (S314 to S316) is completed. Note that the BLE communication timing adjustment processing (S311 to S312) is the same processing as S309 to S310, and thus the description thereof is omitted.

  In step S <b> 314, the control unit 201 instructs the wireless LAN communication unit 205 to establish a wireless LAN connection with the AP 103. In response to this instruction, the wireless LAN communication unit 205 performs wireless LAN connection processing with the AP 103. After establishing the wireless LAN connection, the control unit 201 instructs the wireless LAN communication unit 205 to transmit image data to the AP 103 using multiuser uplink communication. In response to this instruction, the wireless LAN communication unit 205 transmits (uploads) the image data to the AP 103 (S315). When the uploading of the image data is completed, the control unit 201 stops power supply to the wireless LAN communication unit 205 (S316).

  Thus, in this embodiment, the camera 101 operating as a wireless LAN slave station and a BLE slave station requests the BLE master station to perform BLE communication during the sleep period of 802.11ax. Thereby, interference with BLE communication and 802.11ax communication can be prevented. In the present embodiment, the request to the BLE master station corresponds to a parameter change request regarding the BLE communication cycle and communication timing, but if the request is for performing BLE communication during the 802.11ax sleep period, It may be another parameter change request.

  In the present embodiment, the camera 101 requests the control terminal 102 to perform BLE communication during the sleep period (Sleep 407 in FIG. 4) specified by the 802.11ax TWT1. As another form, you may comprise so that the request | requirement for performing BLE communication may be performed in another sleep period (Sleep408, 409 of FIG. 4).

  In this embodiment, the camera 101 operates as a wireless LAN slave station and a BLE slave station. However, the present embodiment can be similarly applied to a case where the camera 101 operates as a wireless LAN master station and a BLE slave station. is there. In this case, the camera 101 does not need S306 for receiving the beacon packet, and performs the processing of S307 to S315 based on the beacon packet transmitted by itself, so that the BLE communication is performed during the sleep period of 802.11ax. To do.

  In the present embodiment, the wireless communication method is described as using 802.11ax as a wireless LAN. However, the present embodiment is not limited to this. In the case of wireless LAN communication in which scheduling is performed, such as PCF (Point Coordination Function), the effect can be obtained similarly to the present embodiment by adjusting the BLE communication timing outside the wireless LAN communication period.

<Embodiment 2>
In the first embodiment, the camera 101 operating as a wireless LAN slave station and a BLE slave station requests the BLE master station to change the BLE communication cycle and the BLE communication timing as connection parameters. As the second embodiment, an embodiment that requests to change the roles of the master station and the slave station will be described. That is, in this embodiment, the role is changed so that the camera 101 operates as a BLE master station and the control terminal 102 as a BLE slave station, and the camera 101 that has become the BLE master station changes the BLE communication cycle and the BLE communication timing. Hereinafter, a different point from Embodiment 1 is demonstrated and description of a common matter is abbreviate | omitted.

  FIG. 8 shows a sequence chart showing the flow of the role changing process in the present embodiment. In the sequence chart of FIG. 8, it is assumed that the camera 101 is operating as a BLE slave station and the control terminal 102 is operating as a BLE master station in the initial state. In this initial state, when the camera 101 receives an image data upload instruction from the control terminal 102 (S801), the camera 101 transmits a role change request to the control terminal 102 (S802). Upon receiving the role change request, the control terminal 102 stops transmitting the BLE data packet (S803) and starts transmitting ADV_IND (S804). On the other hand, when the camera 101 detects that the transmission of the BLE data packet of the control terminal 102 is stopped (S805), the camera 101 transits to the advertisement scan state (S806). Then, the camera 101 transmits CONNECT_REQ to ADV_IND transmitted from the control terminal 102, thereby establishing a BLE connection with the camera 101 as the BLE parent station and the control terminal 102 as the BLE slave station (S807).

  After the camera 101 becomes the BLE master station, the BLE communication cycle and the BLE communication timing are changed so that the BLE communication is performed in the sleep period outside the 802.11ax communication period, as in the first embodiment. This change is made in accordance with the BLE standard. Specifically, first, the camera 101 transmits a connection parameter request packet (LL_CONNECTION_PARAM_REQ). Then, after confirming the contents of the connection parameter request packet (LL_CONNECTION_PARAM_REQ), the control terminal 102 transmits a connection parameter response packet (LL_CONNECTION_PARAM_RSP). The camera 101 can change the BLE communication cycle and the BLE communication timing by transmitting a connection update request packet (LL_CONNECTION_UPDATE_REQ) to the connection parameter response packet (LL_CONNECTION_PARAM_RSP).

  Thus, according to the embodiment described above, the BLE communication cycle and the BLE communication timing are set so that the BLE communication is performed in the sleep period outside the multi-user uplink communication period for the camera 101 that has become the BLE master station. change. Thereby, it becomes possible to prevent interference between BLE communication and multi-user uplink communication.

  In the above-described embodiments, communication of IEEE802.11ax and BLE has been described as an example. However, the present invention can be applied to a plurality of arbitrary wireless communication using the same frequency band. For example, the present invention can be applied to communication of other IEEE 802.11 series or Bluetooth (for example, Bluetooth of a version other than version 4.0). Here, the same frequency band is not limited to a frequency value that completely matches, but is close enough to cause at least part of the frequency band to overlap or interference that causes a communication error. Includes frequency bands.

  In addition, the camera 101 in each of the above embodiments is an example of a communication device, and may be another device such as a smartphone, a PC, a printer, or a display.

<Other embodiments>
The present invention supplies a program that realizes one or more functions of the above-described embodiments to a system or apparatus via a network or a storage medium, and one or more processors in a computer of the system or apparatus read and execute the program This process can be realized. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

101 camera, 102 control terminal, 103 AP, 104 server

Claims (14)

A communication device,
First communication means for performing communication with the first other apparatus using the first wireless communication method at a first period designated by the first other apparatus;
Second communication means for communicating with a second other apparatus using a second wireless communication system that uses the same frequency band as that used in the first wireless communication system; ,
When the communication timing by the first communication means and the communication timing by the second communication means overlap, the first communication means communicates the communication timing by the first communication means and the communication by the second communication means. A communication apparatus, characterized in that a signal for requesting the timing not to overlap is transmitted to the first other apparatus. Determining whether or not a difference between the first period and a natural number multiple of a second period that is a period of a predetermined signal periodically communicated by the second communication unit is greater than a predetermined value Means,
Determining means for determining the first period so that the difference is less than or equal to the predetermined value when the difference is greater than the predetermined value;
The first communication means transmits a signal for requesting to change the first period to the period determined by the determination means to the first other device. The communication apparatus according to 1.   Even when the determining means determines the first cycle, when the communication timing by the first communication means and the communication timing by the second communication means overlap, the determining means further includes the second cycle. The timing of the first cycle is determined to be located in a period other than the communication timing by the communication unit, and the first communication unit changes the timing of the first cycle to the timing determined by the determination unit. The communication apparatus according to claim 2, wherein a signal for requesting the transmission is transmitted to the first other apparatus.   When the second communication means receives the predetermined signal, the determination means determines the timing of the first period based on the predetermined signal received by the second communication means. The communication device according to claim 3.   When the second communication unit transmits the predetermined signal, the determining unit determines the timing of the first period based on the predetermined signal transmitted by the second communication unit. The communication device according to claim 3.   When the communication timing by the first communication unit and the communication timing by the second communication unit overlap, the first communication unit changes the role of designating the first cycle to the communication device. The communication apparatus according to claim 1, wherein a signal for requesting is transmitted to the first apparatus.   The first wireless communication system is a wireless communication system based on BLE (Bluetooth Low Energy), the second wireless communication system is a wireless communication system based on IEEE 802.11ax, and the first communication The timing is a transmission timing of BLE data by the first device, and the second communication timing is a transmission timing of a beacon packet by the second device or the communication device. The communication apparatus according to 1. Determining means for determining whether or not a difference between the first period and a natural number multiple of a second period that is a period of a beacon packet periodically communicated by the second communication means is greater than a predetermined value. When,
Determining means for determining the first period so that the difference is less than or equal to the predetermined value when the difference is greater than the predetermined value;
The first communication means transmits a signal for requesting to change the first period to the period determined by the determination means to the first other device. 8. The communication device according to 7.   Even when the determining means determines the first cycle, when the communication timing by the first communication means and the communication timing by the second communication means overlap, the determining means further includes the second cycle. The timing of the first cycle is determined so as to be located in a period other than the communication timing of the cycle, and the first communication unit changes the timing of the first cycle to the timing determined by the determination unit. The communication device according to claim 8, wherein a signal for requesting the transmission is transmitted to the first other device.   When the second communication means receives the beacon packet, the determination means determines the timing of the first period based on the beacon packet received by the second communication means. The communication device according to claim 9.   When the second communication unit transmits the beacon packet, the determination unit determines the timing of the first period based on the beacon packet transmitted by the second communication unit. The communication device according to claim 9.   When the communication timing by the first communication unit and the communication timing by the second communication unit overlap, the first communication unit changes the role of designating the first cycle to the communication device. The communication apparatus according to claim 7, wherein a signal for requesting is transmitted to the first apparatus. First communication means for performing communication with the first other apparatus using the first wireless communication method at a first period designated by the first other apparatus;
Second communication means for communicating with a second other device using a second wireless communication system using the same frequency band as that used in the first wireless communication system;
A method for controlling a communication device having
When the communication timing by the first communication unit and the communication timing by the second communication unit overlap, the communication timing by the first communication unit and the communication by the second communication unit are transmitted to the first communication unit. A control method for a communication apparatus, comprising: a control step of transmitting a signal for requesting that timings do not overlap to the first other apparatus. The program for functioning a computer as a communication apparatus of any one of Claim 1 to 12.

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