WO2021191979A1 - Dispositif de communication sans fil et procédé d'ajustement de débit de transmission - Google Patents

Dispositif de communication sans fil et procédé d'ajustement de débit de transmission Download PDF

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Publication number
WO2021191979A1
WO2021191979A1 PCT/JP2020/012767 JP2020012767W WO2021191979A1 WO 2021191979 A1 WO2021191979 A1 WO 2021191979A1 JP 2020012767 W JP2020012767 W JP 2020012767W WO 2021191979 A1 WO2021191979 A1 WO 2021191979A1
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Prior art keywords
transmission rate
processor
buffer
rate
wireless communication
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PCT/JP2020/012767
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English (en)
Japanese (ja)
Inventor
明寛 岡田
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ソニーグループ株式会社
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Priority to PCT/JP2020/012767 priority Critical patent/WO2021191979A1/fr
Publication of WO2021191979A1 publication Critical patent/WO2021191979A1/fr

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    • 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

Definitions

  • This disclosure relates to a wireless communication device and a transmission rate adjustment method.
  • the transmission rate in the wireless LAN is controlled according to the radio wave environment, and the better the radio wave environment, the higher the transmission rate is set.
  • the wireless LAN may be used for communication in which stability is important, such as voice communication and communication related to remote control.
  • the transmission rate may become unnecessarily high and the stability of communication may be impaired.
  • the wireless communication device of the present disclosure has a buffer and a processor.
  • the buffer temporarily holds the received packets.
  • the processor determines the transmission rate according to the radio wave environment, and adjusts the transmission rate determined according to the radio wave environment based on the usage state of the buffer by the packet.
  • FIG. 1 is a diagram showing a configuration example of a wireless communication system according to the first embodiment of the present disclosure.
  • the wireless communication system 1 includes a wireless communication device (hereinafter, may be referred to as a “wireless master unit”) 10 on the master unit side and a wireless communication device (hereinafter, “wireless slave unit”) on the slave unit side. (Sometimes called) 20.
  • An example of the wireless communication system 1 is a wireless LAN system.
  • an example of the wireless master unit 10 is a wireless LAN router
  • an example of the wireless slave unit 20 is a smart device such as a smartphone or a tablet terminal.
  • the wireless communication system to which the technology of the present disclosure can be applied is not limited to the wireless LAN system, and the technology of the present disclosure can also be applied to, for example, a mobile communication system.
  • a wireless communication base station can be mentioned as an example of the wireless master unit 10
  • a wireless communication terminal can be mentioned as an example of the wireless slave unit 20.
  • FIG. 2 is a diagram showing a configuration example of the wireless master unit according to the first embodiment of the present disclosure.
  • the wireless master unit 10 includes a CPU (Central Processing Unit) 11, a memory 12, and a wireless communication module 13.
  • the wireless communication module 13 has an antenna 13A.
  • FIG. 3 is a diagram showing a configuration example of the wireless slave unit according to the first embodiment of the present disclosure.
  • the wireless slave unit 20 includes a wireless communication module 21, a CPU 22, a memory 23, a microphone 24, a speaker 25, a touch panel 26, a temperature sensor 27, and a battery 28.
  • the wireless communication module 21 includes an antenna 21A, a wireless processing unit 21W, a buffer 21B, and a processor 21P.
  • the wireless communication module 21, the CPU 22, the memory 23, the microphone 24, the speaker 25, the touch panel 26, and the temperature sensor 27 are driven by using the battery 28 as a power source.
  • Examples of the processor 21P include a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and the like.
  • the packet transmitted from the wireless communication module 13 of the wireless master unit 10 via the antenna 13A is received by the wireless communication module 21 via the antenna 21A of the wireless slave unit 20.
  • the wireless processing unit 21W performs predetermined wireless processing such as down-conversion and A / D conversion on the packet received via the antenna 21A, and outputs the packet after the wireless processing to the buffer 21B. do.
  • the buffer 21B temporarily holds the packet input from the wireless processing unit 21W.
  • the processor 21P acquires the packet held in the buffer 21B from the buffer 21B, and extracts the user data from the acquired packet. Further, the processor 21P demodulates the extracted user data according to the MCS (Modulation and Coding Scheme) level determined and adjusted by the processor 21P, and outputs the demodulated user data to the CPU 22.
  • MCS Modulation and Coding Scheme
  • the CPU 22 decodes the user data input from the processor 21P according to the MCS level determined and adjusted by the processor 21P. For example, when the user data is acoustic data, the CPU 22 D / A-converts the decoded acoustic data to reproduce the acoustic, and outputs the reproduced acoustic from the speaker 25. Further, for example, when the user data is moving image data, the CPU 22 causes the touch panel 26 to display the moving image reproduced from the decoded moving image data.
  • FIG. 4 is a flowchart showing an example of a processing procedure in the wireless slave unit according to the first embodiment of the present disclosure.
  • the processor 21P is a packet (that is, a packet) transmitted from the wireless master unit 10 according to the radio wave environment of the wireless line (hereinafter sometimes referred to as “downlink”) from the wireless master unit 10 to the wireless slave unit 20.
  • the transmission rate (hereinafter, may be referred to as "downline transmission rate") of the packet received by the wireless slave unit 20 (hereinafter, may be referred to as "downline packet") is determined.
  • downline transmission rate the packet received by the wireless slave unit 20
  • step S100 the processor 21P monitors the packet loss in the downlink packet, and sets the downlink transmission rate lower as the occurrence rate of the packet loss increases.
  • FIG. 5 is a diagram showing an example of a downlink transmission rate according to the first embodiment of the present disclosure. As shown in FIG. 5, the downlink transmission rate is defined according to the MCS level. For example, the higher the MCS level, the higher the downlink transmission rate. Therefore, for example, in step S100, the processor 21P determines the downlink transmission rate according to the downlink radio wave environment by selecting the MCS level according to the occurrence rate of packet loss in the downlink packet.
  • step S105 the processor 21P monitors the utilization rate of the downlink packet in the buffer 21B (hereinafter, may be referred to as “buffer usage rate”), and whether or not the buffer usage rate exceeds the threshold THA. To judge. For example, when downlink packets are held in the buffer 21B up to half the total capacity of the buffer 21B, the buffer usage rate is 50%.
  • the threshold THA is preset according to the necessary and sufficient bit rate for reproducing the user data by the CPU 22, and is preset to any value larger than 0% and smaller than 100%. As an example, when the user data is acoustic data, the necessary and sufficient bit rate for reproducing the acoustic data is 128 kbps.
  • the buffer usage rate is greater than the threshold THA (step S105: Yes)
  • the process proceeds to step S110, and when the buffer usage rate is equal to or less than the threshold THA (step S105: No), the process returns to step S100.
  • step S110 the processor 21P reduces the downlink transmission rate by one step by reducing the MCS level by one step. For example, when the current MCS level is "4", the processor 21P reduces the MCS level from "4" to "3" in step S110 to reduce the downlink transmission rate from "18 Mbps" to "12 Mbps”. (Fig. 5).
  • step S115 the processor 21P waits for a predetermined time ⁇ t1 [milliseconds].
  • step S120 the processor 21P monitors the buffer usage rate and determines whether or not the buffer usage rate exceeds the threshold THA.
  • the process proceeds to step S125, and when the buffer usage rate is equal to or less than the threshold THA (step S120: No), the process proceeds to step S130.
  • step S125 the processor 21P determines whether or not the currently set downlink transmission rate is a predetermined minimum downlink transmission rate (hereinafter, may be referred to as "minimum rate"). For example, when the downlink transmission rate corresponding to the MCS level as shown in FIG. 5 is specified, the downlink transmission rate of "6 Mbps" corresponding to the MCS level of "1" becomes the lowest rate. When the current downlink transmission rate is the lowest rate (step S125: Yes), the process proceeds to step S135. On the other hand, when the current downlink transmission rate is not the lowest rate (step S125: No), the process returns to step S110, and the processor 21P further reduces the downlink transmission rate by one step.
  • minimum rate a predetermined minimum downlink transmission rate
  • step S130 the processor 21P increases the downlink transmission rate by one step by increasing the MCS level by one step. For example, when the current MCS level is "4", the processor 21P increases the MCS level from “4" to "5" in step S130 to increase the downlink transmission rate from "18 Mbps" to "24 Mbps". (Fig. 5).
  • step S135 the processor 21P waits for a predetermined time ⁇ t2 [seconds].
  • step S140 the processor 21P monitors the buffer usage rate and determines whether or not the buffer usage rate is equal to or less than the threshold value THA.
  • step S140: Yes the process returns to step S135, and when the buffer usage rate is greater than the threshold THA (step S140: No), the process returns to step S100.
  • the downlink transmission rate determined in step S100, the downlink transmission rate after the decrease in step S110, and the downlink transmission rate after the increase in step S130 are processed in steps S100, S110, and S130.
  • the wireless slave unit 20 notifies the wireless master unit 10 each time it is transmitted. That is, the processor 21P notifies the wireless master unit 10 of the MCS level corresponding to each of the downlink transmission rate determined in step S100 and the adjusted downlink transmission rate in steps S110 and S130, and the wireless master unit.
  • the CPU 11 and the wireless communication module 13 of the 10 encode and modulate the user data according to the MCS level notified from the wireless slave unit 20.
  • the processor 21P adjusts the downlink transmission rate determined according to the downlink radio wave environment based on the usage state of the buffer 21B by the downlink packet. For example, in the first embodiment, the processor 21P adjusts the downlink transmission rate determined according to the downlink radio wave environment based on the buffer usage rate, and decreases the downlink transmission rate when the buffer usage rate is larger than the threshold THA. On the other hand, when the buffer usage rate is equal to or less than the threshold value THA, the downlink transmission rate is adjusted to be increased.
  • the first embodiment has been described above.
  • step S200 shown in FIG. 6 the processor 21P determines the downlink transmission rate according to the downlink radio wave environment in the same manner as in step S100 (FIG. 4).
  • step S205 the processor 21P performs the authenticity determination process shown in FIG. 7.
  • step S300 the processor 21P measures the current buffer usage rate and acquires the current buffer usage rate as the measurement result RX.
  • step S305 the processor 21P waits for a predetermined time ⁇ t3 [milliseconds].
  • step S310 the processor 21P measures the current buffer usage rate and acquires the current buffer usage rate as the measurement result RY. That is, the measurement result RY is the buffer usage rate at the time when a predetermined time ⁇ t3 has elapsed from the time when the measurement result RX is acquired in step S300.
  • RA is a threshold value having a positive value larger than 0
  • determining whether or not "RY-RX ⁇ RA” means that the amount of increase in the buffer usage rate within the predetermined time ⁇ t3 is determined. It corresponds to determining whether or not it is equal to or higher than the threshold value RA.
  • step S315: Yes When the amount of increase in the buffer usage rate is equal to or greater than the threshold value RA, or when the buffer usage rate is constant at 100% (step S315: Yes), the process proceeds to step S320. On the other hand, when the amount of increase in the buffer usage rate is less than the threshold value RA or the buffer usage rate is not maintained at 100% (step S315: No), the process proceeds to step S330.
  • step S325 the processor 21P sets the determination result of the authenticity determination to "true”.
  • step S330 the processor 21P sets the determination result of the authenticity determination to “false”.
  • the determination result of the authenticity determination is “true”, and the buffer within the predetermined time ⁇ t3.
  • the determination result of the authenticity determination is “false”.
  • the buffer usage rate is constant at 100% within the predetermined time ⁇ t3, the determination result of the authenticity determination is “true”.
  • the determination result of the authenticity determination is “false”.
  • step S325 or step S330 After the processing of step S325 or step S330, the processing proceeds to step S210 (FIG. 6).
  • step S210 the processor 21P determines whether or not the determination result of the authenticity determination in step S205 is “true”.
  • the process proceeds to step S215, and when the authenticity determination result is "false” (step S210: No), the process proceeds. Returns to step S200.
  • step S215 the processor 21P reduces the downlink transmission rate by one step by reducing the MCS level by one step, similarly to step S110 (FIG. 4).
  • step S220 the processor 21P performs the authenticity determination process shown in FIG. 7.
  • step S225 the processor 21P determines whether or not the determination result of the authenticity determination in step S220 is "true".
  • step S225: Yes the process proceeds to step S230, and when the authenticity determination result is "false” (step S225: No), the process proceeds. Proceeds to step S235.
  • step S230 the processor 21P determines whether or not the currently set downlink transmission rate is the lowest rate, as in step S125 (FIG. 4). When the current downlink transmission rate is the lowest rate (step S230: Yes), the process proceeds to step S240. On the other hand, when the current downlink transmission rate is not the lowest rate (step S230: No), the process returns to step S215, and the processor 21P further reduces the downlink transmission rate by one step.
  • step S235 the processor 21P increases the downlink transmission rate by one step by increasing the MCS level by one step, as in step S130 (FIG. 4).
  • step S240 the processor 21P waits for a predetermined time ⁇ t2 [seconds] as in step S135 (FIG. 4).
  • step S245 the processor 21P performs the authenticity determination process shown in FIG. 7.
  • step S250 the processor 21P determines whether or not the determination result of the authenticity determination in step S245 is "false".
  • step S250: Yes the process returns to step S240, and when the authenticity determination result is "true” (step S250: No), the process is performed. Returns to step S200.
  • the processor 21P adjusts the downlink transmission rate determined according to the radio wave environment of the downlink based on the usage state of the buffer 21B by the downlink packet, as in the first embodiment. For example, in the second embodiment, the processor 21P adjusts the downlink transmission rate determined according to the downlink radio wave environment based on the increase amount of the buffer usage rate, and when the increase amount of the buffer usage rate is equal to or more than the threshold value RA. While making adjustments to reduce the downlink transmission rate, adjustments are made to increase the downlink transmission rate when the amount of increase in the buffer usage rate is less than the threshold value RA.
  • the temperature sensor 27 detects the temperature inside the wireless slave unit 20 (hereinafter, may be referred to as “slave unit temperature”).
  • slave unit temperature the temperature inside the wireless slave unit 20
  • the processing amount of the processor 21P and the CPU 22 increases, the temperature of the slave unit becomes higher. Further, the processing amount of the processor 21P and the CPU 22 increases as the MCS level increases. That is, the higher the downlink transmission rate, the higher the temperature of the slave unit.
  • FIG. 8 is a flowchart showing an example of a processing procedure in the wireless slave unit according to the third embodiment of the present disclosure.
  • step S400 shown in FIG. 8 the processor 21P determines the downlink transmission rate according to the downlink radio wave environment in the same manner as in step S100 (FIG. 4).
  • step S405 the CPU 22 monitors the slave unit temperature detected by the temperature sensor 27, and determines whether or not the slave unit temperature exceeds the threshold THB.
  • step S405: Yes the process proceeds to step S410, and when the slave unit temperature is equal to or lower than the threshold THB (step S405: No), the process returns to step S400.
  • step S410 the CPU 22 outputs a downlink transmission rate reduction instruction (hereinafter, may be referred to as a “transmission rate reduction instruction”) to the processor 21P.
  • a transmission rate reduction instruction (hereinafter, may be referred to as a “transmission rate reduction instruction”) to the processor 21P.
  • the processor 21P reduces the downlink transmission rate by one step by reducing the MCS level by one step, as in step S110 (FIG. 4).
  • step S415 the processor 21P waits for a predetermined time ⁇ t1 [milliseconds] as in step S115 (FIG. 4).
  • step S420 the CPU 22 monitors the slave unit temperature detected by the temperature sensor 27, and determines whether or not the slave unit temperature exceeds the threshold THB.
  • the CPU 22 outputs a transmission rate decrease instruction to the processor 21P, and the process proceeds to step S425.
  • step S420: No the process proceeds to step S430.
  • step S425 the processor 21P determines whether or not the currently set downlink transmission rate is the lowest rate, as in step S125 (FIG. 4). When the current downlink transmission rate is the lowest rate (step S425: Yes), the process proceeds to step S430. On the other hand, when the current downlink transmission rate is not the lowest rate (step S425: No), the process returns to step S410, and the processor 21P further steps the downlink transmission rate according to the transmission rate decrease instruction output by the CPU 22. Reduce.
  • step S430 the processor 21P waits for a predetermined time ⁇ t1 [milliseconds] as in step S115 (FIG. 4). After the processing of step S430, the processing returns to step S400.
  • the processor 21P adjusts the downlink transmission rate determined according to the downlink radio wave environment based on the slave unit temperature. For example, in the third embodiment, the processor 21P adjusts to reduce the downlink transmission rate when the slave unit temperature is higher than the threshold value THB, while adjusting the downlink transmission rate when the slave unit temperature is equal to or lower than the threshold value THB. Make adjustments to increase.
  • the temperature of the slave unit is maintained near the threshold value THB, so that it is possible to prevent the wireless slave unit 20 from generating high heat.
  • the third embodiment has been described above.
  • step S500 shown in FIG. 9 the processor 21P determines the downlink transmission rate according to the downlink radio wave environment in the same manner as in step S100 (FIG. 4).
  • step S505 the CPU 22 performs the authenticity determination process shown in FIG.
  • step S600 the CPU 22 acquires the current slave unit temperature TX from the temperature sensor 27.
  • step S605 the CPU 22 waits for a predetermined time ⁇ t3 [milliseconds].
  • step S610 the CPU 22 acquires the current slave unit temperature TY from the temperature sensor 27. That is, the slave unit temperature TY is the slave unit temperature at the time when a predetermined time ⁇ t3 has elapsed from the time when the slave unit temperature TX was acquired in step S600.
  • step S615 the CPU 22 determines whether or not “TY-TX ⁇ TA”.
  • TA is a threshold value having a positive value larger than 0
  • determining whether or not "TY-TX ⁇ TA” means that the amount of increase in the temperature of the slave unit within the predetermined time ⁇ t3 is determined. It corresponds to determining whether or not it is equal to or higher than the threshold value TA.
  • step S615: Yes the process proceeds to step S620, and when the amount of increase in the temperature of the slave unit is less than the threshold TA (step S615: No), the process proceeds. Proceeds to step S625.
  • step S620 the CPU 22 sets the determination result of the authenticity determination to "true”.
  • step S625 the CPU 22 sets the determination result of the authenticity determination to “false”.
  • step S615 when the amount of increase in the slave unit temperature within the predetermined time ⁇ t3 is equal to or greater than the threshold value TA, the determination result of the authenticity determination is “true”, and the slave unit temperature within the predetermined time ⁇ t3.
  • the determination result of the authenticity determination is “false”.
  • step S620 or step S625 the processing proceeds to step S510 (FIG. 9).
  • step S510 the CPU 22 determines whether or not the determination result of the authenticity determination in step S505 is “true”.
  • the process proceeds to step S515, and when the authenticity determination result is "false” (step S510: No), the process proceeds. Returns to step S500.
  • step S515 similarly to step S410 (FIG. 8), the CPU 22 outputs a transmission rate decrease instruction to the processor 21P, and the processor 21P reduces the MCS level by one step in accordance with the transmission rate decrease instruction to transmit the downlink. Decrease the rate by one level.
  • step S520 the CPU 22 performs the authenticity determination process shown in FIG.
  • step S525 the CPU 22 determines whether or not the determination result of the authenticity determination in step S520 is "true".
  • the process proceeds to step S530, and when the authenticity determination result is "false” (step S525: No), the process proceeds. Proceeds to step S535.
  • step S530 the processor 21P determines whether or not the currently set downlink transmission rate is the lowest rate, as in step S125 (FIG. 4). When the current downlink transmission rate is the lowest rate (step S530: Yes), the process proceeds to step S535. On the other hand, when the current downlink transmission rate is not the lowest rate (step S530: No), the process returns to step S515, and the processor 21P further steps the downlink transmission rate according to the transmission rate reduction instruction output by the CPU 22. Reduce.
  • step S535 the processor 21P waits for a predetermined time ⁇ t2 [seconds] as in step S135 (FIG. 4). After the process of step S535, the process returns to step S500.
  • the processor 21P adjusts the downlink transmission rate determined according to the radio wave environment of the downlink based on the slave unit temperature, as in the third embodiment. For example, in the fourth embodiment, the processor 21P adjusts to reduce the downlink transmission rate when the amount of increase in the temperature of the slave unit is equal to or greater than the threshold value TA, while the amount of increase in the temperature of the slave unit is less than the threshold value TA. At times, make adjustments to increase the downlink transmission rate.
  • the amount of increase in the temperature of the slave unit is limited to less than the threshold value TA, so that it is possible to prevent the wireless slave unit 20 from generating high heat.
  • the CPU 22 detects the remaining amount of the battery 28 (hereinafter, may be referred to as “remaining battery amount”).
  • the consumption amount of the battery 28 (hereinafter, may be referred to as “battery consumption amount”) increases as the processing amount of the processor 21P and the CPU 22 increases. Further, the processing amount of the processor 21P and the CPU 22 increases as the MCS level increases. Also, as the battery consumption increases, the remaining battery level decreases. That is, the higher the downlink transmission rate, the lower the remaining battery level.
  • FIG. 11 is a flowchart showing an example of a processing procedure in the wireless slave unit according to the fifth embodiment of the present disclosure.
  • step S700 shown in FIG. 11 the processor 21P determines the downlink transmission rate according to the downlink radio wave environment in the same manner as in step S100 (FIG. 4).
  • step S705 the CPU 22 monitors the remaining battery level and determines whether or not the remaining battery level is less than the threshold THC.
  • step S705: Yes the process proceeds to step S710, and when the remaining battery level is greater than or equal to the threshold THC (step S705: No), the process returns to step S700.
  • step S710 the CPU 22 outputs a transmission rate reduction instruction to the processor 21P, and the processor 21P sets the downlink transmission rate to the lowest rate according to the transmission rate reduction instruction.
  • step S715 the CPU 22 determines whether or not charging of the battery 28 has started, and waits until charging of the battery 28 starts (step S715: No). When charging of the battery 28 is started (step S715: Yes), the process returns to step S700.
  • the processor 21P adjusts the downlink transmission rate determined according to the downlink radio wave environment based on the remaining battery level. For example, the processor 21P adjusts the downlink transmission rate to the lowest rate when the remaining battery level is less than the threshold THC.
  • the downlink transmission rate becomes the lowest rate, so that the battery consumption can be suppressed when the remaining battery level is low.
  • the embodiment 5 has been described above.
  • the technique of the present disclosure may be used for adjusting the transmission rate of a packet transmitted from the wireless slave unit 20 (that is, a packet received by the wireless master unit 10).
  • buffer 23B a buffer set in the memory 23 (hereinafter, may be referred to as “buffer 23B”) is to be monitored instead of the buffer 21B.
  • User data after being demodulated by the processor 21P is temporarily held in the buffer 23B, and the buffer 23B is monitored by the CPU 22.
  • the CPU 22 acquires the user data held in the buffer 23B from the buffer 23B, and decodes the acquired user data.
  • the wireless communication device (radio slave unit 20 of the first and second embodiments) of the present disclosure includes a buffer (buffer 21B of the first and second embodiments) and a processor (processor 21P of the first and second embodiments).
  • the buffer temporarily holds the received packets.
  • the processor determines the transmission rate according to the radio wave environment, and adjusts the transmission rate determined according to the radio wave environment based on the usage state of the buffer by the packet.
  • the processor adjusts the transmission rate determined according to the radio wave environment based on the packet usage rate in the buffer, and adjusts to reduce the transmission rate when the usage rate is larger than the threshold value. , When the usage rate is below the threshold value, the transmission rate is adjusted to increase.
  • the processor adjusts the transmission rate determined according to the radio wave environment based on the increase amount of the packet usage rate in the buffer, and when the increase amount is equal to or more than the threshold value, the transmission rate is adjusted. Adjustments are made to decrease, and when the amount of increase is less than the threshold value, adjustments are made to increase the transmission rate.
  • the minimum reception sensitivity is lowered and suddenly occurs. Resistance to noise is reduced.
  • the transmission rate becomes higher than necessary while ensuring the necessary and sufficient bit rate for the reproduction of user data. It is possible to prevent the increase and improve the stability of communication. That is, according to the above configuration, the optimum transmission rate can be set.
  • a buffer that temporarily holds received packets and A processor that determines the transmission rate according to the radio wave environment and adjusts the transmission rate determined according to the radio wave environment based on the usage state of the buffer by the packet.
  • a wireless communication device comprising. (2) The processor adjusts the transmission rate determined according to the radio wave environment based on the utilization of the packet in the buffer. The wireless communication device according to (1) above. (3) The processor adjusts to decrease the transmission rate when the usage rate is greater than the threshold value, and increases the transmission rate when the usage rate is equal to or less than the threshold value. The wireless communication device according to (2) above. (4) The processor adjusts the transmission rate determined according to the radio wave environment based on the amount of increase in the utilization of the packet in the buffer.
  • the wireless communication device according to (1) above. (5) When the increase amount is equal to or more than the threshold value, the processor adjusts to decrease the transmission rate, and when the increase amount is less than the threshold value, the processor adjusts to increase the transmission rate.
  • the wireless communication device (4) above.
  • a temperature sensor that detects the temperature inside the device and A processor that determines the transmission rate according to the radio wave environment and adjusts the transmission rate determined according to the radio wave environment based on the temperature.
  • a wireless communication device comprising.
  • the processor makes adjustments to decrease the transmission rate when the temperature is above the threshold, and adjusts to increase the transmission rate when the temperature is below the threshold.
  • the wireless communication device according to (7) above.
  • the processor adjusts to decrease the transmission rate, and when the amount of increase is less than the threshold value, the processor adjusts to increase the transmission rate.
  • the wireless communication device according to (7) above.
  • (10) Determine the transmission rate according to the radio wave environment, Detects the temperature inside the own device and The transmission rate determined according to the radio wave environment is adjusted based on the temperature. Transmission rate adjustment method.
  • a processor that determines the transmission rate according to the radio wave environment and adjusts the transmission rate determined according to the radio wave environment based on the remaining amount of the battery.
  • a wireless communication device comprising. (12) The processor adjusts the transmission rate to a predetermined minimum rate when the remaining amount is less than the threshold value. The wireless communication device according to (11) above. (13) Determine the transmission rate according to the radio wave environment, Monitor the remaining battery level of the wireless communication device and The transmission rate determined according to the radio wave environment is adjusted based on the remaining amount. Transmission rate adjustment method.
  • Wireless communication system 10 Wireless master unit 20 Wireless slave unit 21 Wireless communication module 21B Buffer 21P Processor 22 CPU 27 temperature sensor 28 battery

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Abstract

Selon l'invention, dans un dispositif de communication sans fil, un tampon conserve temporairement des paquets reçus, un processeur détermine un débit de transmission selon l'environnement radio et, en fonction de l'utilisation du tampon par des paquets, ajuste le débit de transmission déterminé selon l'environnement radio. Par exemple, le débit de transmission déterminé selon l'environnement radio est ajusté en fonction du taux d'utilisation de paquets dans le tampon : si le taux d'utilisation est supérieur à une valeur seuil, alors un ajustement est effectué pour réduire le débit de transmission, et si le taux d'utilisation est inférieur ou égal à une valeur seuil, alors un ajustement est effectué pour augmenter le débit de transmission.
PCT/JP2020/012767 2020-03-23 2020-03-23 Dispositif de communication sans fil et procédé d'ajustement de débit de transmission WO2021191979A1 (fr)

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