WO2020137365A1 - 通信装置、通信装置の制御方法、およびプログラム - Google Patents

通信装置、通信装置の制御方法、およびプログラム Download PDF

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Publication number
WO2020137365A1
WO2020137365A1 PCT/JP2019/046994 JP2019046994W WO2020137365A1 WO 2020137365 A1 WO2020137365 A1 WO 2020137365A1 JP 2019046994 W JP2019046994 W JP 2019046994W WO 2020137365 A1 WO2020137365 A1 WO 2020137365A1
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Prior art keywords
communication device
transmission rate
wur
communication
unit
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Ceased
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PCT/JP2019/046994
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English (en)
French (fr)
Japanese (ja)
Inventor
永吾郎 伊奈
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Canon Inc
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Canon Inc
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Publication of WO2020137365A1 publication Critical patent/WO2020137365A1/ja
Priority to US17/215,922 priority Critical patent/US11729719B2/en
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Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters
    • H04W28/22—Negotiating communication rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to wireless communication technology.
  • a communication device uses a WUR transmitter or a receiver (WUR) that operates with more power saving.
  • WUR WUR transmitter or a receiver
  • a configuration including a transmitter or a receiver having a function has been proposed (Patent Document 1).
  • PCR is an abbreviation for Primary Connectivity Radio
  • WUR is an abbreviation for Wake Up Radio.
  • the transmitter/receiver having the PCR function and the transmitter or receiver having the WUR function are also referred to as a PCR unit and a WUR unit, respectively.
  • a WUR mode is specified, and in this mode, an AP (access point) regularly sends a WUR beacon.
  • the STA (station) that has received the WUR beacon transmitted from the AP can maintain the synchronization with the AP without performing communication by the PCR unit.
  • the STA can terminate the WUR mode and transmit the data from the PCR unit to the AP.
  • the AP transmits a WUR Wake-up frame to the STA.
  • the STA receives the WUR Wake-up frame in the WUR section, ends the WUR mode, and can receive the data from the AP in the PCR section.
  • a communication device uses a low data rate as a data rate of a wireless signal used for transmitting a data frame immediately after connection with a partner communication device. Then, the communication device gradually increases the data rate while confirming that the reception response (Ack: Acknowledgement) is returned from the partner communication device. When the communication device cannot receive the Ack, the communication device lowers the data rate and retransmits the wireless signal.
  • Ack Acknowledgement
  • the communication device lowers the data rate and retransmits the wireless signal.
  • frame aggregation introduced in IEEE 802.11n or later That is, the communication device gradually increases the number of frames (data number) to be connected if the transmission of the data frame is successful, and decreases the number of frames or stops the frame aggregation operation if the transmission fails. ..
  • the PCR unit since the PCR unit is disabled in the WUR mode, whether the data rate of the signal used for transmission by the PCR unit or the setting of the frame aggregation is optimum immediately after the WUR mode ends. I do not understand. In particular, when there is a change in the communication path such as the movement of the STA as a communication device during the period in the WUR mode, the data rate and frame aggregation settings used before the transition to the WUR mode are changed. It is likely that you will need to make changes.
  • the STA changes the data rate and the frame aggregation setting again and retransmits the radio signal, and continues such retransmitting operation until it receives Ack from the AP. Repeating retransmission is not desirable from the viewpoint of power consumption, communication speed, space/frequency utilization efficiency of communication, and the like.
  • the WUR mode when the WUR mode is started, the distance between the AP and the STA is long, the selected data rate is relatively low, the number of frames connected by frame aggregation is small, or the frame aggregation operation is invalid. It is supposed to be. It is assumed that the STA moves in this state during the WUR mode and the distance from the AP decreases. In this case, communication at a higher data rate becomes possible, but if the STA sends the AP to the wireless signal with the setting before starting the WUR mode in the PCR unit, the communication speed lower than the communication speed that can be realized originally is used. , Communication time becomes long.
  • the present disclosure provides a technique for appropriately determining the setting related to data transmission after the WUR mode is terminated.
  • the communication device of the present invention has the following configuration as one means for achieving the above object. That is, a first communication means that is a communication device and is connected to another communication device and communicates by using a PCR (Primary Connectivity Radio) function in the IEEE802.11ba standard, and the other communication device and the IEEE802.11ba standard. A value indicating the signal strength or signal quality of the signal from the second communication means that communicates by using the WUR (Wake Up Radio) function and the signal received from the other communication device by the second communication means. And an setting unit that sets the transmission rate of the first communication unit based on the value acquired by the acquisition unit.
  • PCR Primary Connectivity Radio
  • FIG. 3 is a flowchart showing a process of STA in the embodiment.
  • 3 is a flowchart showing a process of STA in the embodiment.
  • FIG. 1 shows an example of the wireless network configuration of this embodiment.
  • the STA 101 is a WUR non-AP STA (wireless LAN terminal) compliant with the IEEE 802.11ba standard, and is a communication device having a PCR unit and a WUR unit in the IEEE 802.11ba standard, as described later.
  • IEEE is an abbreviation for Institute of Electrical and Electronics Engineers.
  • PCR is an abbreviation for Primary Connectivity Radio
  • WUR is an abbreviation for Wake Up Radio.
  • the STA 101 establishes a wireless connection with the AP 102 by performing Association and Authentication based on the IEEE 802.11 series standard using the PCR unit. Further, the STA 101 can perform data communication with the AP 102 by transmitting and receiving a frame compliant with the IEEE 802.11 series standard using the PCR unit.
  • the STA 101 operates in the WUR mode conforming to the IEEE 802.11ba standard, and receives the WUR beacon transmitted from the AP 102 by using the WUR section, thereby maintaining the synchronization with the AP 102.
  • the WUR mode is a mode in which the PCR unit shifts to the Doze state in the IEEE 802.11 series standard and the WUR unit shifts to a communicable state.
  • the STA 101 can suppress the power consumption related to the communication with the AP 102 by setting the PCR unit in the Doze state.
  • the Doze state is a power saving state in which the function of transmitting and receiving signals using the PCR unit with the AP 102 is stopped.
  • the STA 101 operating in the WUR mode can terminate the WUR mode and transmit the data to the AP 102 using the PCR unit when the data to be transmitted to the AP 102 occurs.
  • the WUR unit of the STA 101 receives a WUR Wake Up frame that conforms to the IEEE 802.11ba standard from the AP 102
  • the STA 101 ends the WUR mode and can receive data from the AP 102 using the PCR unit.
  • the STA 101 is moving, and its moving range is within the range in which the AP 102 can communicate (illustrated by a circle 103 in FIG. 1).
  • AP 102 is a WUR AP (wireless LAN access point) that conforms to the IEEE 802.11ba standard, and similarly has a PCR unit and a WUR in the IEEE 802.11ba standard.
  • the PCR unit of the AP 102 builds a wireless network that complies with the IEEE 802.11 series standard.
  • the beacon transmitted by the PCR unit of the AP 102 is a PCR beacon compliant with the IEEE802.11ba standard.
  • the PCR beacon includes information indicating that the AP 102 is compatible with IEEE 802.11ba.
  • the WUR unit of the AP 102 transmits a WUR beacon conforming to the IEEE802.11ba standard.
  • the WUR beacon is transmitted to a plurality of non-AP STAs individually or grouped for each WUR non-AP STA, and also includes TSF information for maintaining synchronization with the AP 102.
  • TSF is an abbreviation for Timing Synchronization Function.
  • the STA 101 may be, for example, an image input device such as an image pickup device (camera, video camera, or the like) or a scanner, or an image output device such as a printer (SFP or MFP), a copy machine, or a projector. Good. Further, it may be a storage device such as a hard disk device or a memory device, or may be an information processing device such as a personal computer or a smartphone. Note that SFP is an abbreviation for Single Function Printer, and MFP is an abbreviation for Multi-Function Printer. Further, it may be an IoT (Internet of Things) device such as a sensor that can be connected to the Internet via the AP 102.
  • IoT Internet of Things
  • FIG. 2A is a diagram showing a hardware configuration example of the STA 101
  • FIG. 2B is a diagram showing a functional configuration example of the STA 101.
  • the storage unit 201 is composed of one or more memories such as a ROM and a RAM, and stores programs for performing various operations described later and various information such as communication parameters for wireless communication.
  • storage unit 201 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, non-volatile memory cards, and DVDs. May be used.
  • 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, non-volatile memory cards, and DVDs. May be used.
  • the control unit 202 is composed of one or more processors such as a CPU and MPU, and controls the entire STA 101 by executing a program stored in the storage unit 201. Note that the control unit 202 may control the entire STA 101 by cooperation of a program stored in the storage unit 201 and an OS (Operating System). Further, the control unit 202 may include a plurality of processors such as a multi-core, and the plurality of processors may control the entire STA 101.
  • the control unit 202 also controls the functional unit 203 to execute predetermined processing such as imaging, printing, and projection.
  • the functional unit 203 is hardware for the STA 101 to execute a predetermined process.
  • the functional unit 203 is an image capturing unit and performs image capturing processing.
  • the functional unit 203 is a printing unit and performs print processing.
  • the functional unit 203 is a projection unit and performs projection processing.
  • the data processed by the functional unit 203 may be data stored in the storage unit 201 or may be data communicated with another communication device via the communication unit 206 described later.
  • the input unit 204 receives various operations from the user.
  • the output unit 205 performs various outputs to the user.
  • the output by the output unit 205 includes at least one of display on a screen, voice output by a speaker, vibration output, and the like.
  • both the input unit 204 and the output unit 205 may be realized by one module like a touch panel.
  • the communication unit 206 controls the antenna 207 to send and receive wireless signals for wireless communication. Note that the number of antennas 207 is not limited to one and may be plural.
  • the communication unit 206 includes a PCR unit 208 and a WUR unit 209.
  • the PCR unit 208 has a PCR function and controls wireless communication conforming to the IEEE 802.11 series standard.
  • the WUR unit 209 has a WUR function, and periodically waits for reception of a signal such as a WUR beacon or a WUR Wake-up frame when the WUR mode is started. When the WUR Wake-up frame is received, the WUR unit 209 has a function of notifying the PCR unit 208 of this and ending the WUR mode. During the WUR mode, since the PCR unit 208 saves power, the function of transmitting and receiving signals is stopped. Therefore, the function of the communication unit 206 is exclusively handled by the WUR unit 209.
  • the PCR unit 208 and the WUR unit 209 have a function of notifying the control unit 202 of the RSSI value indicating the received signal strength of the received wireless signal, and the past RSSI value is stored in the storage unit 201 via the control unit 202. Can be recorded.
  • RSSI is an abbreviation for Received Signal Strength Indicator.
  • the PCR unit 208 and the WUR unit 209 are configured as independent RF circuits. However, the present invention is not limited to this, and the PCR unit 208 and the WUR unit 209 may be configured as an integrated RF circuit.
  • the STA 101 enables the function of the PCR unit 208 when bringing the PCR into the Awake state. On the other hand, when the PCR is set to the Doze state, the function of the PCR unit 208 is disabled.
  • the STA 101 also performs similar control on the WUR.
  • the RF circuit in which the PCR unit 208 and the WUR unit 209 are integrated operates with less power consumption when the function of the WUR unit 209 is enabled than when the function of the PCR unit 208 is enabled.
  • the case where the PCR unit 208 in the present embodiment is in the Awake state corresponds to the state in which the PCR function is enabled in the RF circuit in which the PCR and the WUR are integrated.
  • the case where the WUR unit 209 in the present embodiment is in the Awake state corresponds to the state in which the WUR function is enabled in the RF circuit in which the PCR and the WUR are integrated.
  • the data rate setting unit 211 determines and sets the data rate used when the PCR unit 208 of the STA 101 transmits a data frame.
  • the RSSI acquisition unit 212 acquires the RSSI of the signal received by the communication unit 206 by measurement processing or the like.
  • the frequency band determination unit 213 determines whether the frequency band of the received signal and the frequency band used by the PCR unit 208 are the same.
  • the WUR mode control unit 214 controls the start, continuation, and end of the WUR mode of the STA 101. In addition, the WUR mode control unit 214 performs control for shifting the state of the PCR unit 208 to the Doze state or the Awake state based on the IEEE 802.11 series standard in response to the change of the WUR mode.
  • FIGS. 3A and 3B are flowcharts showing the processing of the STA 101 in this embodiment. It is assumed that the STA 101 receives a PCR beacon that the AP 102 periodically transmits when establishing a wireless connection with the AP 102.
  • the PCR beacon transmitted from the AP 102 includes information indicating that the AP 102 is compatible with IEEE802.11ba and information regarding a channel (frequency band) used in the WUR mode. Therefore, by receiving the PCR beacon, the STA 101 can determine that the AP 102 that has established the wireless connection is compatible with IEEE802.11ba.
  • the flowcharts shown in FIGS. 3A and 3B are realized by the control unit 202 reading and executing the program stored in the storage unit 201 of the STA 101. Further, some or all of the steps shown in the flowcharts of FIGS. 3A and 3B may be realized by hardware such as ASIC.
  • ASIC is an abbreviation for Application Specific Integrated Circuit.
  • the data rate setting unit 211 of the STA 101 uses the latest value of the data rate used when the PCR unit 208 in the Awake state transmits a data frame to the AP 102 (before starting the WUR mode (for example, immediately before)). Data rate) is recorded in the storage unit 201 (S301).
  • the STA 101 performs a shift process to the WUR mode with the AP 102 (S302). For example, the WUR mode control unit 214 determines to shift the STA 101 to the WUR mode in response to a user operation, the STA 101 not transmitting data for a certain period of time, or the like. As a process of transitioning to the WUR mode, specifically, first, the PCR unit 208 of the STA 101 transmits an Enter WUR Mode Request frame, which is a request to start the WUR mode, to the AP 102.
  • the Enter WUR Mode Request frame includes cycle information (Duty Cycle Period) indicating the cycle (reception interval) of the period in which the WUR unit 209 waits for a signal from the WUR unit of the AP 102.
  • the AP 102 determines the reception interval included in the Enter WUR Mode Request frame received from the STA 101 as the WUR beacon transmission interval (WUR duty Cycle). Then, the AP 102 transmits an Enter WUR Mode Response frame including start timing information (Starting time of the WUR duty Cycle) indicating the start timing of the transmission interval.
  • the PCR unit 208 of the STA 101 receives the Enter WUR Mode Response frame from the AP 102, and transmits the WUR Mode enter frame to the AP 102 if the contents, that is, the contents indicated by the start timing information are agreed. Then, the WUR mode control unit 214 causes the WUR unit 209 to start waiting for a signal at the timing based on the start timing information. Further, the WUR mode control unit 214 shifts the state of the PCR unit 208 to the Doze state (S302). In this way, the STA 101 shifts to the WUR mode. Note that the Enter WUR Mode Request frame and the Enter WUR Mode Response frame are both action frames that comply with the IEEE 802.11 series standard.
  • the frequency band determination unit 213 of the STA 101 When shifting to the WUR mode, the frequency band determination unit 213 of the STA 101 has the same frequency band of the WUR beacon received by the WUR unit 209 as the frequency band used for the data frame transmission used by the PCR unit 208. It is determined whether or not (S303).
  • two frequency bands are assumed: a 2.4 GHz band (center frequency is 2.412 GHz to 2.472 GHz) or a 5 GHz band (center frequency is 5.18 GHz to 5.7 GHz).
  • the 5 GHz band is further divided into two (5.18 to 5.32 GHz and 5.5 GHz to 5.7 GHz) or divided into three (5.18 to 5.24 GHz, 5.26 to 5.32 GHz, 5.5 GHz to 5. 7 GHz) may be used.
  • the process proceeds to S314.
  • the data rate setting unit 211 determines to use the data rate recorded in S301 without changing when the PCR unit 208 shifts to the Awake state and transmits data by PCR (S314). ). That is, the data rate setting unit 211 determines to use the data rate used by the PCR unit 208 in the Awake state before shifting to the Doze state in the PCR unit 208 in the Awake state shifting from the Doze state. If the frequency bands used by the PCR unit 208 and the WUR unit 209 are different, it is not accurate to reflect the state change amount obtained in the WUR mode in the data rate for transmission by the PCR unit 208. This is because there are cases.
  • the process proceeds to S304.
  • the RSSI acquisition unit 212 acquires the RSSI in the WUR beacon received by the WUR unit 209 and records it in the storage unit 201 as the RSSI in the initial WUR mode.
  • the process of S304 may be performed before S303.
  • the RSSI acquisition unit 212 acquires the RSSI of the WUR beacon each time the WUR beacon is received and records the RSSI in the storage unit 201 as the latest RSSI (S305).
  • the timing of receiving the WUR beacon is determined based on the period (reception interval) of the period in which the WUR unit 209 waits for a signal from the WUR of the AP 102 and the start timing information included in the Enter WUR Mode Response frame.
  • the WUR mode control unit 214 determines whether or not to end the WUR mode at regular intervals (S306).
  • the WUR mode control unit 214 makes the determination, for example, based on the presence/absence of data to be transmitted from the STA 101 to the AP 102. In this case, the WUR mode control unit 214 determines to end without continuing the WUR mode when there is data to be transmitted, and to continue the WUR mode when there is no data to transmit. Also, when the WUR unit 209 receives the WUR Wake-up frame from the AP 102, the WUR mode control unit 214 can determine to end the WUR mode.
  • the WUR unit 209 receives the WUR beacon again, and the RSSI acquisition unit 212 sets the RSSI of the received WUR beacon as the latest RSSI.
  • the data is recorded in the storage unit 201 (S305).
  • the WUR mode control unit 214 shifts the state of the PCR unit 208 from the Doze state to the Awake state. Shifting the state of the PCR unit 208 to the Awake state is also called activation. Then, the STA 101 restarts communication with the AP 102 via the PCR unit 208 (S307).
  • the processing from S308 subsequent to S307 is processing in which the data rate setting unit 211 determines the data rate used for transmitting the data frame before the activated PCR unit 208 transmits the data frame.
  • the data rate setting unit 211 determines whether the data rate recorded in S301 is the maximum data rate that the STA 101 can use and the latest SSI is equal to or higher than a predetermined level. When these two conditions are satisfied (Yes in S308), it is highly possible that the STA 101 can continue to use the maximum rate, so the data rate setting unit 211 determines not to change the PCR data rate. (S314).
  • the predetermined level used for the comparison with the RSSI is a value of a level sufficient to maintain the maximum data rate.
  • the data rate setting unit 211 determines the next step. After that, the data rate used by the PCR unit 208 is determined. This is because the STA 101 is more likely to have an optimal data rate other than the maximum data rate.
  • the data rate setting unit 211 calculates the difference between the initial RSSI obtained in S304 and the latest RSSI obtained in S305 during the WUR mode as the RSSI change amount (S309). Then, the data rate setting unit 211 determines whether the calculated difference is equal to or more than a predetermined amount (S310).
  • a predetermined amount consider a case where the latest RSSI is larger than the initial RSSI by 4 dB or more, or is smaller than 2 dB or more.
  • the data rate setting unit 211 changes the data rate used in the PCR unit 208 for transmitting the data frame, which is recorded in S301 before shifting to the WUR mode. It is decided to use without using (S314).
  • the data rate setting unit 211 further determines whether the latest RSSI is smaller or larger than the initial RSSI in the WUR mode (S311). That is, the data rate setting unit 211 determines whether the RSSI change due to the RSSI difference is due to an increase in RSSI or a decrease in RSSI.
  • the data rate setting unit 211 decides to use the data rate reduced from the data rate recorded in S301 in correspondence with the amount of change in RSSI.
  • the data rate setting unit 211 uses the Modulation and Coding Scheme (MCS (which is an index of a combination of a modulation scheme and a coding rate) defined in IEEE 802.11 every time the RSSI difference increases by 2 dB. ) Is lowered step by step (S312).
  • MCS Modulation and Coding Scheme
  • the data rate setting unit 211 lowers the data rate from the list of available data rates by one step every 2 dB. To do.
  • the data rate setting unit 211 reduces the data rate used by the PCR unit 208 according to the amount of change in the RSSI of the WUR beacon, so that the PCR unit 208 retransmits the data frame immediately after the WUR mode ends.
  • the frequency of occurrence of can be reduced.
  • communication can be resumed in a state close to the optimum data rate without lowering the data rate more than necessary.
  • the latest RSSI is larger than the initial RSSI (No in S311), it is considered that the communication environment between the STA 101 and the AP 102 is improved compared to when the WUR mode was started.
  • the data frame can be transmitted even at a higher data rate, and if the data frame is transmitted at a low data rate, communication will take longer than necessary, resulting in power consumption and space utilization. Efficiency deteriorates. Therefore, it is desirable to improve the data rate for communication, but if the data rate is too high, the required transmission distance cannot be secured, and there is a possibility that data frame transmission will fail and retransmission will occur. .. Therefore, it is necessary to raise the data rate relatively small with respect to the amount of change in RSSI.
  • the data rate setting unit 211 determines to use the data rate obtained by increasing the data rate recorded in S301 in correspondence with the amount of change in RSSI (the amount of increase is greater than the amount of decrease in S312). Make it smaller).
  • the data rate setting unit 211 increases the MCS by one step each time the RSSI difference increases by 4 dB (S313).
  • the setting of frame aggregation (the number of frames), the number of antennas or the number of spatial multiplexing, and the number of channels bundled when using channel bonding may be adjusted.
  • the RSSI SIR, SINR, RSRP, RSRQ, which may be SIR, SINR, RSRP, RSRQ. Let's try.
  • the RSSI of the WUR beacon has decreased, the number of connected frames is decreased. As a result, it can be expected that the same effect as that of the above embodiment can be obtained.
  • the data rate to be processed in S301 of FIG. 3A and S308 of FIG. 3B is set as the number of frames of frame aggregation, the number of antennas or the number of spatial multiplexing, and the channel bonding.
  • the number of channels bundled at the time of use may be used, or the data rate may be used as shown in FIGS. 3A and 3B.
  • the difference between the initial RSSI and the latest RSSI is obtained in S309, the difference may be calculated using any RSSI of the RSSIs that are periodically received.
  • the data rate is adjusted stepwise, but the data rate may be adjusted by referring to a lookup table or another method. The same applies to the setting of frame aggregation, the number of antennas, and the like as another example of the transmission rate to be adjusted.
  • the present invention supplies a program that implements 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. It can also be realized by the processing. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
  • a circuit for example, ASIC

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022092072A1 (ja) * 2020-10-26 2022-05-05 株式会社 Preferred Networks 通信制御装置、移動体、基地局、及び通信制御方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7373287B2 (ja) 2019-02-28 2023-11-02 キヤノン株式会社 通信装置、通信方法、及び、プログラム
JP2023009678A (ja) * 2021-07-07 2023-01-20 キヤノン株式会社 通信装置、通信方法、及びプログラム

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016189933A1 (ja) * 2015-05-27 2016-12-01 ソニー株式会社 通信装置および通信方法
US20170094600A1 (en) * 2015-09-25 2017-03-30 Intel Corporation Apparatus, system and method of communicating a wakeup packet
WO2018038532A1 (ko) * 2016-08-23 2018-03-01 한국전자통신연구원 무선랜에서 저전력 모드를 지원하는 통신 노드의 동작 방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9130706B2 (en) * 2005-05-26 2015-09-08 Unwired Planet, Llc Method and apparatus for signal quality loss compensation in multiplexing transmission systems
WO2018128595A1 (en) * 2017-01-03 2018-07-12 Nokia Technologies Oy Waking up a dozing wireless device
US20180234918A1 (en) 2017-02-14 2018-08-16 Qualcomm Incorporated Wakeup radio synchronization techniques
US20180309538A1 (en) 2017-04-25 2018-10-25 Qualcomm Incorporated Data rate selection for wake-up radio transmissions
US11564169B2 (en) * 2017-07-05 2023-01-24 Apple Inc. Wake-up-radio link adaptation
EP3649757A4 (en) * 2017-07-07 2021-03-10 Nokia Technologies Oy CONTROLLING CONNECTIVITY FOR DOZENS OF WIRELESS DEVICES
US11589309B2 (en) * 2018-01-12 2023-02-21 Intel Corporation Methods and arrangements to support wake-up radio packet transmission
US11032770B2 (en) * 2018-01-16 2021-06-08 Apple Inc. Wake-up-radio discovery frame

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016189933A1 (ja) * 2015-05-27 2016-12-01 ソニー株式会社 通信装置および通信方法
US20170094600A1 (en) * 2015-09-25 2017-03-30 Intel Corporation Apparatus, system and method of communicating a wakeup packet
WO2018038532A1 (ko) * 2016-08-23 2018-03-01 한국전자통신연구원 무선랜에서 저전력 모드를 지원하는 통신 노드의 동작 방법

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022092072A1 (ja) * 2020-10-26 2022-05-05 株式会社 Preferred Networks 通信制御装置、移動体、基地局、及び通信制御方法

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