WO2017113293A1 - 通信设备以及降低通信设备功耗的方法、装置 - Google Patents

通信设备以及降低通信设备功耗的方法、装置 Download PDF

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Publication number
WO2017113293A1
WO2017113293A1 PCT/CN2015/100118 CN2015100118W WO2017113293A1 WO 2017113293 A1 WO2017113293 A1 WO 2017113293A1 CN 2015100118 W CN2015100118 W CN 2015100118W WO 2017113293 A1 WO2017113293 A1 WO 2017113293A1
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Prior art keywords
power
wifi
voltage
supply voltage
actual
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PCT/CN2015/100118
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English (en)
French (fr)
Inventor
王同波
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to KR1020187021342A priority Critical patent/KR102079539B1/ko
Priority to CN201580084954.8A priority patent/CN108370540B/zh
Priority to JP2018534700A priority patent/JP6663502B2/ja
Priority to US16/067,211 priority patent/US10932194B2/en
Priority to PCT/CN2015/100118 priority patent/WO2017113293A1/zh
Priority to EP15911919.7A priority patent/EP3389314B1/en
Publication of WO2017113293A1 publication Critical patent/WO2017113293A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving 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
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving 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
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
    • 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 the field of communications, and in particular, to a communication device and a method and apparatus for reducing power consumption of a communication device.
  • WIFI usage scenarios are more and more frequent.
  • the communication device that accesses the WIFI access point (AP) has a fixed supply voltage to the WIFI power amplifier, and supplies power to the WIFI power amplifier with the maximum supply voltage, which has serious power consumption and affects the endurance of the portable product. .
  • an embodiment of the present invention provides a communication device and a method and apparatus for reducing power consumption of a communication device, which can dynamically adjust a power supply voltage of a WIFI power amplifier in a communication device according to actual transmit power required by the communication device to transmit data. Reduce the power consumption of communication devices.
  • the first aspect provides a method for reducing power consumption of a communication device, including: determining a minimum power supply voltage of a WIFI power amplifier circuit that satisfies a WIFI communication rate and an actual transmit power; and providing a working voltage for a WIFI power amplifier circuit for data transmission, a working voltage It is a voltage not lower than the minimum supply voltage and lower than the maximum supply voltage.
  • determining a minimum power supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmit power including: searching for a corresponding WIFI communication rate in the voltage mapping table.
  • At least two different maximum transmit powers respectively corresponding to different minimum supply voltages, and the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate, and is searched in the voltage mapping table.
  • Corresponding to the actual transmit power refers to finding the maximum transmit power that is the same as the actual transmit power.
  • the method further comprises: determining whether the data transmission is successful, and if the transmission fails, retransmitting the data by using the maximum power supply voltage as the actual working voltage of the WIFI power amplifying circuit.
  • the step of determining the minimum power supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmit power is performed under the preset condition,
  • the condition is that the communication device detects that there is a data transmission request.
  • the method includes: detecting a received signal strength from the WIFI access point, and detecting a WIFI communication rate of the communication device transmitting data to the WIFI access point; according to the received signal strength and the WIFI communication rate The actual transmit power is determined. The greater the received signal strength, the smaller the actual transmit power, the larger the WIFI communication rate, and the smaller the actual transmit power.
  • determining an actual transmit power according to the received signal strength and the WIFI communication rate including: finding and receiving signal strength in the power mapping table, and WIFI
  • the preset transmit power corresponding to the communication rate determines the preset transmit power as the actual transmit power, wherein in the power map, each WIFI communication rate under the same received signal strength corresponds to a preset transmit power.
  • the second aspect provides a device for reducing power consumption of a communication device, where the device includes: a voltage determining module, configured to determine a minimum power supply voltage of a WIFI power amplifying circuit that satisfies a WIFI communication rate and an actual transmitting power; a power supply module, and a voltage determining module
  • the connection is used for providing a working voltage to the WIFI power amplifying circuit for data transmission, and the working voltage is a voltage not lower than the minimum supply voltage and lower than the maximum supply voltage.
  • the device further includes a storage module, where the storage module is configured to store a voltage mapping table, and the voltage determining module is configured to: search a corresponding WIFI communication rate in the voltage mapping table, The lowest supply voltage of the actual transmission power; wherein the voltage mapping table records a one-to-one mapping relationship between the WIFI communication rate, the maximum transmission power, and the lowest supply voltage, and each WIFI communication rate corresponds to at least two different maximum transmission powers, The at least two different maximum transmit powers respectively correspond to different minimum supply voltages, and the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate, and the corresponding correspondence is found in the voltage mapping table.
  • the actual transmit power refers to finding the maximum transmit power that is the same as the actual transmit power.
  • the device further includes a determining module, where the determining module is configured to: determine whether the data transmission is successful, and if the transmission fails, the power supply module is powered by the maximum The voltage is retransmitted as the actual operating voltage of the WIFI power amplifier circuit.
  • the device further includes a detecting module, and the voltage determining module determines a minimum power supply of the WIFI power amplifying circuit that satisfies the WIFI communication rate and the actual transmitting power.
  • the voltage step is performed under the preset condition, and the preset condition is that the detecting module detects that there is a data transmission request.
  • the device further includes a power determining module, a power determining module
  • the method is: detecting a received signal strength from a WIFI access point, and detecting a WIFI communication rate of the communication device transmitting data to the WIFI access point; determining an actual transmit power according to the received signal strength and the WIFI communication rate, wherein the received signal strength The larger the actual transmission power is, the larger the WIFI communication rate is, and the smaller the actual transmission power is.
  • the power determining module is configured to: find, in the power mapping table, a preset transmit power corresponding to the received signal strength and the WIFI communication rate. Determined as the actual transmit power of the WIFI power amplifier circuit, wherein in the power map, each data transmission rate under the same received signal strength corresponds to a preset transmit power.
  • the third aspect provides a communication device, where the communication device comprises a WIFI circuit, and the WIFI circuit comprises: a WIFI power amplifier circuit, a voltage source and a WIFI chip, the WIFI chip is respectively connected to the WIFI power amplifier circuit and the voltage source, and the voltage source is connected to the WIFI power amplifier circuit.
  • the WIFI chip determines the minimum supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmission power; and controls the voltage source to provide the working voltage for data transmission to the WIFI power amplifier circuit, and the working voltage is a voltage not lower than the lowest supply voltage. And below the maximum supply voltage.
  • the WIFI chip is configured to: search, in the voltage mapping table, a minimum supply voltage corresponding to the WIFI communication rate and the actual transmission power; wherein the voltage mapping table records the WIFI. a one-to-one mapping relationship between the communication rate, the maximum transmit power, and the lowest supply voltage, each WIFI communication rate corresponding to at least two different maximum transmit powers, and at least two different maximum transmit powers respectively corresponding to different minimum supply voltages
  • the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate.
  • Finding the corresponding actual transmit power in the voltage map refers to finding the largest transmit with the same actual transmit power. Shooting power.
  • the WIFI chip further detects the received signal strength from the WIFI access point, and detects that the communication device accesses the WIFI The WIFI communication rate of the data transmitted by the access point; the actual transmit power is determined according to the received signal strength and the WIFI communication rate, wherein the greater the received signal strength, the smaller the actual transmit power, the larger the WIFI communication rate, and the smaller the actual transmit power.
  • the WIFI chip further searches for a preset transmit power corresponding to the received signal strength and the WIFI communication rate in the power mapping table, and determines that The actual transmit power of the WIFI power amplifying circuit, wherein in the power map, each data transmission rate under the same received signal strength corresponds to a preset transmit power.
  • the invention determines the minimum supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmission power; supplies the working voltage to the WIFI power amplifier circuit for data transmission, and the working voltage is not lower than the voltage of the lowest supply voltage and lower than the maximum
  • the power supply voltage can dynamically adjust the working voltage of the WIFI power amplifier circuit in the communication device according to the transmission power required for the communication device WIFI to transmit data, and does not need to provide the maximum power supply voltage to the WIFI power amplifier circuit, thereby reducing the work of the communication device. Consumption.
  • FIG. 1 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a WIFI circuit of the first embodiment of FIG. 1;
  • FIG. 3 is a schematic structural diagram of an apparatus for reducing power consumption of a communication device according to a first embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of an apparatus for reducing power consumption of a communication device according to a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an apparatus for reducing power consumption of a communication device according to a third embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an effect of reducing power consumption of a communication device according to an embodiment of the present invention.
  • FIG. 7 is a schematic flow chart of a method for reducing power consumption of a communication device according to a first embodiment of the present invention.
  • FIG. 8 is a flow chart showing a method of reducing power consumption of a communication device according to a second embodiment of the present invention.
  • FIG. 1 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • the communication device 100 includes a radio frequency (RF) circuit 1110, a memory 1120, an input unit 1130, a display unit 1140, a sensor 1150, an audio circuit 1160, a wireless fidelity (WIFI) circuit 1170, a processor 1180, and a power supply. 1190 and other components. These components communicate over one or more communication buses or signal lines.
  • Communication device 100 can be any communication device including, but not limited to, a handheld computer, a tablet, a mobile phone, a media player, a personal digital assistant (PDA), etc., and a combination of two or more thereof.
  • PDA personal digital assistant
  • the RF circuit 1110 can be used for receiving and transmitting signals during and after receiving or transmitting information, in particular, after receiving the downlink information of the base station, and processing it to the processor 1180; in addition, transmitting the uplink data to the base station.
  • RF circuits include, but are not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like.
  • LNA Low Noise Amplifier
  • RF circuitry 1110 can also communicate with the network and other devices via wireless communication.
  • the above wireless communication may use any communication standard or protocol, including but not limited to Global System of Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (Code Division). Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), e-mail, Short Messaging Service (SMS), and the like.
  • GSM Global System of Mobile communication
  • GPRS General Packet
  • the memory 1120 can be used to store software programs and modules, and the processor 1180 performs various functional applications and data processing of the communication devices by running software programs and modules stored in the memory 1120.
  • the memory 1120 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may be stored according to Data created by the use of communication devices (such as audio Data, phone book, etc.).
  • memory 1120 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
  • the input unit 1130 can be configured to receive input gesture information, digital or character information, and generate key signal inputs related to user settings and function control of the communication device 100.
  • the input unit 1130 may include a touch screen 1131 and other input devices 1132.
  • the touch screen 1131 can collect touch operations on or near the user (such as the operation of the user using a finger, a stylus, or the like on the touch screen 1131 or near the touch screen 1131), and according to a preset program. Drive the corresponding connecting device.
  • the touch operation may include one or more of the following operation modes: pressure operation, touch operation (such as sliding operation, drag operation), click operation, multi-contact operation, button input, long press input, and the like.
  • the touch screen 1131 may include a touch sensor and/or a pressure sensor to detect a touch signal and/or a pressure signal of the user, and convert the touch signal into contact coordinates, a gesture track, and Other touch information converts the pressure signal to a pressure value and other information, and then transmits the above information to the processor 1180 and can receive and execute the command from the processor 1180.
  • the touch screen 1131 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves.
  • the input unit 1130 may also include other input devices 1132.
  • other input devices 1132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.
  • the display unit 1140 can be used to display information input by the user or information provided to the user and various menus of the communication device.
  • the display unit 1140 can include a display screen 1141.
  • the display screen 1141 can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.
  • the touch screen 1131 may be overlaid on the display screen 1141.
  • the touch screen 1131 detects a touch operation thereon or nearby, the touch screen 1131 transmits to the processor 1180 to determine the type of the touch event, and then the processor 1180 according to the type of the touch event.
  • a corresponding visual output is provided on display 1141.
  • the touch screen 1131 and the display screen 1141 are two separate components to implement the input and output functions of the communication device, in some embodiments, the touch screen 1131 can be integrated with the display screen 1141 to implement the communication device. Input and output functions.
  • the communication device may also include at least one type of sensor 1150, such as a pressure sensor, a light sensor, a motion sensor, and other sensors.
  • the pressure sensor can also be located at the side frame of the communication device, and when the side frame is squeezed, the pressure sensor can detect the pressure value of the pressing.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may be based on The brightness of the ambient light is used to adjust the brightness of the display 1141, and the light sensor can turn off the display 1141 and/or the backlight when the communication device moves to the ear.
  • the acceleration sensor can detect the magnitude of acceleration in all directions (usually three axes).
  • FIG. 1 shows the sensor 1150, it can be understood that it does not belong to the essential configuration of the communication device, and can be omitted as needed within the scope of not changing the essence of the invention.
  • Audio circuitry 1160, speaker 1161, and microphone 1162 can provide an audio interface between the user and the communication device.
  • the audio circuit 1160 can transmit the converted electrical data of the received audio data to the speaker 1161, and convert it into a sound signal output by the speaker 1161; on the other hand, the microphone 1162 converts the collected sound signal into an electrical signal, and the audio circuit 1160 After receiving, it is converted into audio data, and then processed by the audio data output processor 1180, transmitted to the other communication device via the RF circuit 1110, or outputted to the memory 1120 for further processing.
  • the WIFI circuit 1170 is a short-range wireless transmission technology.
  • the communication device can help the user to send and receive emails, browse web pages, and access streaming media through the WIFI circuit 1170, which provides wireless broadband Internet access for users.
  • the processor 1180 is a control center of the communication device that connects various portions of the entire communication device using various interfaces and lines, by running or executing software programs and/or modules stored in the memory 1120, and recalling data stored in the memory 1120. , performing various functions of the communication device and processing data, thereby performing overall monitoring of the communication device.
  • the processor 1180 may include one or more processing units; preferably, the processor 1180 may integrate an application processor and a modem processor, where the application processor mainly processes an operating system, a user interface, an application, and the like.
  • the modem processor primarily handles wireless communications. It will be appreciated that the above described modem processor may also not be integrated into the processor 1180.
  • the communication device also includes a power source 1190 (such as a battery) that supplies power to the various components.
  • a power source 1190 such as a battery
  • the power source can be logically coupled to the processor 1180 through a power management system to manage functions such as charging, discharging, and power management through the power management system.
  • the communication device may further include a camera, a Bluetooth module, a GPS module, etc., and details are not described herein.
  • the WIFI circuit 1170 includes a WIFI chip 11, a WIFI power amplifying circuit 12, a voltage source 13, and a band pass filter.
  • the WIFI chip 11 is connected to the WIFI power amplifying circuit 12 and the voltage source 13, the voltage source 13 is also connected to the WIFI power amplifying circuit 12, and the band pass filter 14 is connected between the WIFI power amplifying circuit 12 and the antenna 15.
  • the WIFI chip 11 transmits the data to the WIFI power amplifying circuit 12, and the WIFI chip 11 controls the voltage source 13 to supply the working voltage to the WIFI power amplifying circuit 12, so that the WIFI power amplifying circuit 12 amplifies at the working voltage. Processing is then filtered by bandpass filter 14 and transmitted via antenna 15. During downlink data transmission, the data received by the antenna 15 is filtered by the bandpass filter 14 and transmitted to the WIFI power amplifying circuit 12. The WIFI chip 11 controls the voltage source 13 to provide a working voltage to the WIFI power amplifier 12, and the WIFI power amplifying circuit 12 works in the same. The amplification process is performed under voltage and transmitted to the WIFI chip 11.
  • the WIFI chip 11 is configured to: determine a minimum power supply voltage of the WIFI power amplifying circuit 12 that satisfies the WIFI communication rate and the actual transmitting power; provide a working voltage to the WIFI power amplifying circuit 12 for data transmission, and the working voltage is Not less than the voltage of the lowest supply voltage and lower than the maximum supply voltage.
  • the WIFI chip 11 controls the voltage source 13 to provide a working voltage to the WIFI power amplifying circuit 12 for data transmission.
  • the WIFI communication rate is the physical layer rate of the communication device.
  • the user turns on the WIFI communication function of the communication device, and the WIFI chip 11 detects whether there is a data transmission request. If there is a data transmission request, the actual transmission power of the WIFI power amplification circuit 12 is determined according to the channel state.
  • the channel state includes the WIFI communication rate of the communication device 10, the received signal strength, and the false alarm rate. For example, if the communication device is closer to the WIFI access point and the WIFI signal quality is better, the transmit power of the WIFI power amplifier circuit 12 can be reduced, that is, the operating voltage of the WIFI power amplifier circuit 12 can be reduced.
  • the WIFI chip 11 determines the actual transmit power of the WIFI power amplifying circuit 12 according to the channel state, including: detecting the received signal strength from the WIFI access point, and detecting the WIFI communication rate at which the communication device transmits data to the WIFI access point.
  • the actual transmit power is determined according to the received signal strength and the WIFI communication rate, wherein the received signal strength and the WIFI communication rate have a negative correlation with the actual transmit power, that is, the greater the received signal strength, the smaller the actual transmit power, and the WIFI communication The higher the rate, the smaller the actual transmit power. That is, under other conditions, such as the received signal strength, etc., the WIFI communication rate is large, and the actual transmission power is smaller.
  • the WIFI chip 11 finds a preset transmit power corresponding to the received signal strength and the WIFI communication rate in the power mapping table, and sets the preset transmit power as the actual transmit power of the WIFI power amplifier circuit, where the power map is included in the power map.
  • Each data transmission rate under the same received signal strength corresponds to a preset transmission power.
  • the error packet rate generated when the communication device transmits data to the WIFI access point with the actual transmit power is lower than a preset upper threshold.
  • the WIFI chip 11 determines the minimum power supply voltage of the WIFI power amplifying circuit 12 under the WIFI communication rate and the actual transmitting power
  • the lowest power supply voltage corresponding to the WIFI communication rate and the actual transmitting power is searched in the voltage mapping table.
  • the voltage mapping table records a one-to-one mapping relationship between the WIFI communication rate, the maximum transmission power, and the lowest supply voltage.
  • Each WIFI communication rate corresponds to at least two different maximum transmit powers, and at least two different maximum transmit powers respectively correspond to different minimum supply voltages.
  • Finding the corresponding actual transmit power in the voltage mapping table refers to finding and actual transmit power. The same maximum transmit power.
  • the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate. Referring to Table 1, when the WIFI communication protocol is fixed, the WIFI communication rate, modulation mode, coding rate, and Error Vector Magnitude (EVM) are fixed, and thus can be based on the Error Vector Magnitude (EVM) indicator requirement, or EVM.
  • the maximum transmit power is determined on the premise of a certain margin.
  • BPSK biphasic phase shift keying modulation
  • QPSK quadrature phase shift keying modulation
  • QAM quadrature amplitude modulation
  • 16, 64, 256 represent modulation orders.
  • Higher Order modulation methods such as 64QAM and 256QAM are introduced in the Institute of Electrical and Electronics Engineers (IEEE) standard.
  • the communication device WIFI communication rate is as shown in Table 1. It can be seen that according to the IEEE 802.11ac protocol, the higher the modulation order, the stricter the EVM index requirement, and the corresponding WIFI communication is satisfied when the efficiency of the WIFI power amplifying circuit 12 is fixed. The lower the maximum transmit power of the rate.
  • the maximum transmit power at different WIFI communication rates shown in Table 1 above is merely an example. According to the change of the protocol, the use environment, and the difference of the devices, different maximum transmit powers may be used.
  • the first row indicates different WIFI communication rates under different WIFI protocols, and the values in the table, such as 16, 15, 14, etc., indicate that the WIFI power amplifying circuit 12 satisfies the WIFI communication rate and the corresponding minimum supply voltage. Maximum transmit power.
  • the first column Vi represents the lowest supply voltage of the WIFI power amplifying circuit 12 satisfying the corresponding WIFI communication rate and the maximum transmission power, wherein VCC_max represents the maximum supply voltage, and Delta represents the voltage difference between two adjacent supply voltages, and the value may be Free to set.
  • 11b, g, n, ac represent different WIFI protocols, and 1M, 6M, ..., MCS8, and MCS9 represent physical layer rates.
  • Table 2 WIFI communication rate, maximum transmit power and minimum supply voltage mapping table
  • the lowest supply voltage corresponding to the maximum transmission power is the lowest supply voltage that satisfies the maximum transmission power of the WIFI power amplification circuit 12.
  • the supply voltage supplied to the WIFI power amplifying circuit 12 is not lower than the minimum voltage supply voltage in the voltage mapping table, and can satisfy the requirement that the WIFI power amplifying circuit 12 emit the maximum transmitting power.
  • WIFI at 11b/1M Under the communication rate condition, when the maximum transmission power is 14dBm, the lowest supply voltage of the WIFI power amplifier circuit 12 is VCC_max-2*Delta, and the voltages VCC_max-Delta and VCC_max higher than or equal to the minimum supply voltage are WIFI power amplifier circuits.
  • the working voltage of 12 can satisfy the requirement that the WIFI power amplifying circuit 12 emits a transmission power of 14 dBm.
  • the maximum supply voltage is VCC_max.
  • mapping relationship between the WIFI communication rate, the maximum transmission power, and the minimum supply voltage shown in Table 2 above is merely an example, and may vary according to protocol changes, usage environments, and device differences.
  • the WIFI chip 11 determines whether the data transmission is successful after providing the working voltage to the WIFI power amplifying circuit 12 for data transmission. If the transmission fails, the control voltage source 13 provides the maximum power supply voltage to the WIFI power amplifying circuit. The actual operating voltage of the WIFI power amplifying circuit 12 retransmits the data. If the transmission is successful, it is determined whether the data has been transferred. If the transmission has been completed, the transmission of the current data is ended, and the power supply to the WIFI power amplifying circuit 12 is stopped. If not all transmissions are completed, the minimum supply voltage of the WIFI power amplifier circuit 12 that satisfies the WIFI communication rate and the actual transmission power is re-determined to continue the transmission of the uncompleted data.
  • the check bit can be set in the transmitted data to determine whether the data transmission is successful, and the flag bit is set at the end of the data to determine whether the data has been transmitted, and of course, other methods may be used. This is not a limitation.
  • the WIFI chip 11 determines the lowest supply voltage of the WIFI power amplifying circuit 12 under the actual transmitting power according to the WIFI communication rate and the actual transmitting power of the WIFI power amplifying circuit 12 through the search voltage mapping table, to the WIFI power.
  • the amplifying circuit 12 provides the power supply voltage for data transmission, and the working voltage is a voltage not lower than the lowest power supply voltage and lower than the maximum power supply voltage, so that the power supply of the WIFI power amplifying circuit 12 is dynamically adjusted according to the actual transmitting power of the WIFI power amplifying circuit 12.
  • the voltage reduces the power consumption of the WIFI, prolongs the use time of the communication device, and improves the user experience.
  • the lowest supply voltage can be selected, and the power consumption is the lowest, and any supply voltage higher than the lowest supply voltage and smaller than the maximum supply voltage can be selected.
  • the maximum supply voltage can also be selected.
  • the selection of the actual transmit power may be obtained by searching the power mapping table according to the foregoing embodiment, and the preset transmit power in the device may be directly selected regardless of the received signal strength.
  • FIG. 3 is a schematic structural diagram of an apparatus for reducing power consumption of a communication device according to the first embodiment of FIG. 1.
  • FIG. Loading The set 20 includes a voltage determination module 21 and a power supply module 22.
  • the voltage determining module 21 is configured to determine a minimum supply voltage of the WIFI power amplifying circuit that satisfies the WIFI communication rate and the actual transmitting power.
  • the power supply module 22 is connected to the voltage determining module 21 for providing a working voltage to the WIFI power amplifying circuit for data transmission, and the working voltage is not lower than the voltage of the lowest power supply voltage and lower than the maximum power supply voltage.
  • the voltage determining module 21 is configured to: in the voltage mapping table, find a minimum supply voltage corresponding to the WIFI communication rate and the actual transmission power.
  • the voltage mapping table records a one-to-one mapping relationship between the WIFI communication rate, the maximum transmission power, and the lowest supply voltage.
  • Each WIFI communication rate corresponds to at least two different maximum transmission powers, and at least two different maximum transmission powers respectively correspond to At different minimum supply voltages, the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate.
  • Finding the corresponding actual transmit power in the voltage map refers to the search and actual transmit power. The same maximum transmit power.
  • the apparatus 20 further includes a determination module 23 and a detection module 24.
  • the voltage determining module 21 determines that the minimum supply voltage of the WIFI power amplifier that satisfies the WIFI communication rate and the actual transmission power is performed under a preset condition, and the preset condition is that the detection module 24 detects that there is a data transmission request. If the detection module 24 does not detect that the communication device has a data transmission request, the power supply module 22 stops supplying power to the WIFI power amplification circuit.
  • device 20 also includes a power determination module 25.
  • the power determining module 21 determines the minimum power supply voltage of the WIFI power amplifying circuit that satisfies the WIFI communication rate and the actual transmitting power
  • the power determining module 21 is configured to: detect the received signal strength from the WIFI access point, and detect the communication device to The WIFI communication rate at which the WIFI accesses the access point to transmit data.
  • the actual transmit power is determined according to the received signal strength and the WIFI communication rate. The greater the received signal strength, the smaller the actual transmit power, the larger the WIFI communication rate, and the smaller the actual transmit power.
  • the voltage determining module 21 further searches for a preset transmit power corresponding to the received signal strength and the WIFI communication rate in the power mapping table, and determines the actual transmit power of the WIFI power amplifying circuit, where the same receiving is performed in the power mapping table.
  • Each data transmission rate under signal strength corresponds to a preset transmission power.
  • the error packet rate generated when the communication device transmits data to the WIFI access point with the actual transmit power is less than a preset upper threshold.
  • the determining module 23 is configured to: determine whether the data transmission is successful. If the transmission fails, the power supply module 22 retransmits the data with the maximum supply voltage as the actual operating voltage of the WIFI power amplifier circuit. If the transmission is successful, it is judged whether the data is completely transmitted. If the transmission has been completed, the power supply module 22 stops supplying power to the WIFI power amplifier circuit, that is, the power supply voltage of the WIFI power amplifier circuit is 0. If the data has not been transferred, Then, the voltage determining module 21 re-determines the minimum power supply voltage of the WIFI power amplifying circuit that satisfies the WIFI communication rate and the actual transmitting power to continue the data transmission.
  • the check bit can be set in the transmitted data to determine whether the data transmission is successful, and the flag bit is set at the end of the data to determine whether the data has been transmitted, and of course, other methods may be used.
  • the embodiment of the present invention dynamically adjusts the power supply voltage of the WIFI power amplifier circuit according to the transmit power required by the WIFI power amplifier circuit to transmit data, thereby reducing the power consumption of the communication device, prolonging the use time of the communication device, and improving the user experience.
  • the ordinate is the current of the battery end of the communication device
  • the abscissa is the actual transmit power of the WIFI power amplifier.
  • the received signal strength is above -55 dBm, and the mobile phone transmits.
  • the power 10dBm can meet the normal throughput requirement, the battery terminal current savings is about 51%, the WIFI power amplifier circuit's working voltage is reduced from 4.2V to 1.8V, the transmit power is maintained at 10dBm, and the power consumption is reduced by about 51%.
  • the apparatus of the embodiment of the present invention can be applied to a WIFI communication system or a multi-rate communication system of orthogonal frequency division multiplexing modulation.
  • FIG. 7 is a schematic flow chart of a method for reducing power consumption of a communication device according to a first embodiment of the present invention. As shown in FIG. 7, the method for reducing power consumption of a communication device according to an embodiment of the present invention includes:
  • S10 Determine a minimum supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmission power.
  • S10 is performed under the preset condition, and the preset condition is that a data transmission request is detected. If it is not detected that the communication device has a data transmission request, the power supply to the WIFI power amplifying circuit is stopped.
  • the actual transmit power of the WIFI power amplifying circuit is determined based on the channel state.
  • the channel state is also related to the received signal strength and the false alarm rate. For example, if the communication device is closer to the WIFI access point and the WIFI signal quality is better, the transmit power of the WIFI power amplifier circuit can be reduced, that is, the power supply voltage of the WIFI power amplifier voltage can be reduced.
  • the method includes: detecting a received signal strength from the WIFI access point, and detecting a WIFI communication rate of the communication device transmitting data to the WIFI access point; determining an actual transmit power according to the received signal strength and the WIFI communication rate, wherein, receiving The larger the signal strength, the smaller the actual transmission power, the larger the WIFI communication rate, and the smaller the actual transmission power.
  • the preset transmit power corresponding to the received signal strength and the WIFI communication rate is found in the power mapping table, and is determined as the actual transmit power of the WIFI power amplifier circuit, where each of the same received signal strengths is in the power map.
  • the data transmission rate corresponds to a preset transmission power. Actual launch The error packet rate generated when power is transmitted to the WIFI access point is less than a preset upper threshold.
  • the lowest supply voltage corresponding to the WIFI communication rate and the actual transmission power is searched in the voltage mapping table.
  • the voltage mapping table records a one-to-one mapping relationship between the WIFI communication rate, the maximum transmission power, and the lowest supply voltage, and each WIFI communication rate corresponds to at least two different maximum transmission powers, and at least two different maximum transmission powers.
  • the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate. Finding the corresponding actual transmit power in the voltage mapping table refers to the search and the actual The maximum transmit power with the same transmit power.
  • the working voltage is a voltage not lower than the minimum supply voltage, and lower than the maximum supply voltage.
  • the method further includes:
  • the transmission It is judged whether the data transmission is successful. If the transmission fails, the data is retransmitted with the maximum supply voltage as the actual working voltage of the WIFI power amplifier circuit. If the transmission is successful, it is judged whether the data is successfully transmitted; if the transmission fails, the maximum power supply voltage is used as the actual working voltage of the WIFI power amplifier to retransmit the data; if the transmission is successful, it is judged whether the data is transmitted or not, if the data has been transmitted, Stop supplying power to the WIFI power amplifier, that is, the voltage output to the WIFI power amplifier is 0, and continue to detect whether there is a data transmission request. See Figure 8 for details.
  • WIFI is turned on and connected to the AP. That is, the WIFI function of the communication device is turned on.
  • S202 Determine an actual transmit power of the WIFI power amplifier in the communication device according to the current channel state.
  • the channel state includes a physical layer rate of the communication device.
  • the channel state is also related to the received signal strength, the false alarm rate, and the like. For example, if the communication device is closer to the WIFI access point and the WIFI signal quality is better, the transmit power of the WIFI power amplifier circuit can be reduced, that is, the power supply voltage of the WIFI power amplifier circuit can be reduced.
  • the received signal strength from the WIFI access point is detected, and the WIFI communication rate at which the communication device transmits data to the WIFI access point is detected.
  • the actual transmit power is determined according to the received signal strength and the WIFI communication rate. The greater the received signal strength, the smaller the actual transmit power, the larger the WIFI communication rate, and the smaller the actual transmit power.
  • the preset transmit power corresponding to the received signal strength and the WIFI communication rate is found in the power mapping table, and is determined as the actual transmit power of the WIFI power amplifier circuit, where each of the same received signal strengths is in the power map.
  • Data transmission rate Corresponding to a preset transmit power. The error packet rate generated when the data is transmitted to the WIFI access point by the actual transmit power is less than a preset upper threshold. Skip to S204.
  • the power supply voltage of the WIFI power amplifier circuit in the default communication device is 0, that is, the power supply to the WIFI power amplifier circuit is stopped, and the process jumps to S201.
  • S204 Determine a minimum supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmit power.
  • the lowest supply voltage corresponding to the WIFI communication rate and the actual transmission power is searched in the voltage mapping table.
  • the voltage mapping table records a one-to-one mapping relationship between the WIFI communication rate, the maximum transmission power, and the lowest supply voltage, and each WIFI communication rate corresponds to at least two different maximum transmission powers, and at least two different maximum transmission powers.
  • the maximum transmit power is the maximum transmit power that can be achieved by the minimum supply voltage defined by the WIFI communication protocol and the WIFI communication rate. Finding the corresponding actual transmit power in the voltage mapping table refers to the search and the actual The maximum transmit power with the same transmit power.
  • S205 automatically adjust the working voltage Vcc to the lowest power supply voltage Vi, and provide the minimum working voltage to the WIFI power amplifying circuit for data transmission.
  • S206 Determine whether the data is successfully transmitted. If the transfer is successful, S208 is performed; if the transfer fails, S207 is performed.
  • the operating voltage of the WIFI power amplifying circuit may be adjusted to be any higher than the minimum supply voltage and lower than the maximum supply voltage.
  • the maximum supply voltage can also be selected as the operating voltage of the WIFI power amplifying device.
  • S208 Whether the data is transmitted or not. If yes, return to S201; if no, return to S202. If the data has been transferred, the transmission of the current data is ended, and the process returns to S201 to determine whether there is data transmission for the next data transmission. If the data is not completely transmitted, the transmission power of the WIFI power amplifying circuit is re-determined according to the current channel state to continue transmitting the unsent data according to the lowest power supply voltage.
  • the check bit can be set in the transmitted data to determine whether the data transmission is successful, and the flag bit is set at the end of the data to determine whether the data has been transmitted, and of course, other methods may be used. This is not a limitation.
  • the method is applied to a WIFI communication system, or an orthogonal frequency division multiplexing modulated multi-rate communication system.
  • the present invention determines the minimum supply voltage of the WIFI power amplifier circuit that satisfies the WIFI communication rate and the actual transmission power; provides the working voltage for the WIFI power amplifier circuit for data transmission, and the working voltage is not lower than the voltage of the lowest supply voltage. And below the maximum supply voltage, the power supply voltage of the power amplifier in the communication device can be dynamically adjusted according to the transmission power required by the communication device to transmit data, and the power consumption of the communication system is reduced.

Abstract

本发明公开了一种通信设备以及降低通信设备功耗的方法、装置，方法包括：确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；向WIFI功率放大电路提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。通过以上公开内容，本发明能够根据通信设备送数据所需要的发射功率，动态调整通信设备中WIFI功率放大器的供电电压，降低通信系统的功耗。

Description

通信设备以及降低通信设备功耗的方法、装置 【技术领域】
本发明涉及通信领域，特别是涉及一种通信设备以及降低通信设备功耗的方法、装置。
【背景技术】
随着通信设备的不断普及和高速增长，越来越多的终端用户使用通信设备。用户希望在更多的应用场景优先使用WIFI进行数据业务通信，WIFI使用场景越来越频繁。目前接入WIFI访问接入点(Access Point，AP)的通信设备，其向WIFI功率放大器提供的供电电压固定，均以最大供电电压向WIFI功率放大器供电，功耗严重，影响便携产品的续航能力。
【发明内容】
有鉴于此，本发明实施例提供了一种通信设备以及降低通信设备功耗的方法、装置，能够根据通信设备传输数据所需要的实际发射功率，动态调整通信设备中WIFI功率放大器的供电电压，降低通信设备的功耗。
第一方面提供一种降低通信设备功耗的方法，包括：确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；向WIFI功率放大电路提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。
结合第一方面的实现方式，在第一种可能的实现方式中，确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压，包括：在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压；其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，向 WIFI功率放大电路提供工作电压进行数据传输之后，方法还包括：判断数据传输是否成功，若传输失败，则以最大供电电压作为WIFI功率放大电路的实际工作电压重新传输数据。
结合第一方面的实现方式，在第三种可能的实现方式中，确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压的步骤是在满足预设条件下进行的，预设条件是：通信设备检测到有数据传输请求。
结合第一方面、第一方面的第一种可能的、第二种可能的以及第三种可能的实现方式，在第四种可能的实现方式中，确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压之前，方法包括：检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率；根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。
结合第一方面第四种可能的实现方式，在第五种可能的实现方式中，根据接收信号强度和WIFI通信速率确定实际发射功率，包括：在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，将预设发射功率定为实际发射功率，其中在功率映射表中，相同接收信号强度下每个WIFI通信速率均相对应一个预设发射功率。
第二方面提供一种降低通信设备功耗的装置，装置包括：电压确定模块，用于确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；供电模块，与电压确定模块连接，用于向WIFI功率放大电路提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。
结合第二方面的实现方式，在第一种可能的实现方式中，装置进一步包括存储模块，存储模块用于存储电压映射表，电压确定模块用于：在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压；其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
结合第二方面的第一种可能的实现方式，在第二种可能的实现方式中，装置还包括判断模块，判断模块用于：判断数据传输是否成功，若传输失败，则供电模块以最大供电电压作为WIFI功率放大电路的实际工作电压重新传输数据。
结合第二方面的第二种可能的实现方式，在第三种可能的实现方式中，装置还包括检测模块，电压确定模块确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压的步骤是在满足预设条件下进行的，预设条件是：检测模块检测到有数据传输请求。
结合第二方面的、第二方面的第一种可能的、第二种可能的以及第三种可能的实现方式，在第四种可能的实现方式中，装置还包括功率确定模块，功率确定模块用于：检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率；根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。
结合第二方面的第四种可能的实现方式，在第五种可能的实现方式中，功率确定模块用于：在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，确定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均相对应一个预设发射功率。
第三方面提供一种通信设备，通信设备包括WIFI电路，WIFI电路包括：WIFI功率放大电路、电压源和WIFI芯片，WIFI芯片分别连接WIFI功率放大电电路和电压源，电压源连接WIFI功率放大电路；WIFI芯片确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；并控制电压源向WIFI功率放大电路提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。
结合第三方面的实现方式，在第一种可能的实现方式中，WIFI芯片用于：在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压；其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发 射功率。
结合第三方面的、第三方面的第一种可能的实现方式，在第二种可能的实现方式中，WIFI芯片进一步检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率；根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。
结合第三方面的第二种可能的实现方式，在第三种可能的实现方式中，WIFI芯片进一步在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，确定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均相对应一个预设发射功率。
本发明通过确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路器的最低供电电压；向WIFI功率放大电路提供工作电压进行数据传输，工作电压不低于最低供电电压的电压且低于最大供电电压，能够根据通信设备WIFI传输数据所需要的发射功率，动态调整通信设备中WIFI功率放大电路的工作电压，并不需要向WIFI功率放大电路固定提供最大供电电压，因此能够降低通信设备的功耗。
【附图说明】
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例的通信设备的结构示意图；
图2是图1中第一实施例的WIFI电路的结构示意图；
图3是本发明第一实施例的降低通信设备功耗的装置的结构示意图；
图4是本发明第二实施例的降低通信设备功耗的装置的结构示意图；
图5是本发明第三实施例的降低通信设备功耗的装置的结构示意图；
图6是本发明实施例的通信设备降低功耗的效果示意图；
图7是本发明第一实施例的降低通信设备功耗的方法的流程示意图；
图8是本发明第二实施例的降低通信设备功耗的方法的流程示意图。
【具体实施方式】
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1为本发明实施例中一种通信设备的结构示意图。通信设备100包括射频(Radio Frequency，RF)电路1110、存储器1120、输入单元1130、显示单元1140、传感器1150、音频电路1160、无线保真(wireless fidelity，WIFI)电路1170、处理器1180、以及电源1190等部件。这些部件通过一条或多条通信总线或信号线进行通信。通信设备100可以是任何通信设备，包括但不限于手持电脑、平板电脑、移动电话、媒体播放器、个人数字助理(PDA)等等，还包括其中两项或多项的组合。本领域技术人员可以理解，图1中示出的设备结构并不构成对通信设备的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。
下面结合图1对通信设备100的各个构成部件进行具体的介绍：
RF电路1110可用于收发信息或通话过程中，信号的接收和发送，特别地，将基站的下行信息接收后，给处理器1180处理；另外，将上行的数据传输给基站。通常，RF电路包括但不限于天线、至少一个放大器、收发信机、耦合器、低噪声放大器(Low Noise Amplifier，LNA)、双工器等。此外，RF电路1110还可以通过无线通信与网络和其他设备通信。上述无线通信可以使用任一通信标准或协议，包括但不限于全球移动通讯系统(Global System of Mobile communication，GSM)、通用分组无线服务(General Packet Radio Service，GPRS)、码分多址(Code Division Multiple Access，CDMA)、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)、长期演进(Long Term Evolution，LTE))、电子邮件、短消息服务(Short Messaging Service，SMS)等。
存储器1120可用于存储软件程序以及模块，处理器1180通过运行存储在存储器1120的软件程序以及模块，从而执行通信设备的各种功能应用以及数据处理。存储器1120可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序(比如声音播放功能、图像播放功能等)等；存储数据区可存储根据通信设备的使用所创建的数据(比如音频 数据、电话本等)等。此外，存储器1120可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。
输入单元1130可用于接收输入的手势信息、数字或字符信息，以及产生与通信设备100的用户设置以及功能控制有关的键信号输入。具体地，输入单元1130可包括触摸屏1131以及其他输入设备1132。触摸屏1131，可收集用户在其上或附近的触控操作(比如用户使用手指、触笔等任何适合的物体或附件在触摸屏1131上或在触摸屏1131附近的操作)，并根据预先设定的程式驱动相应的连接装置。具体地，触控操作可包括以下一种或多种操作方式：如压力操作、触摸操作(如滑动操作、拖拽操作)、点击操作、多触点操作、按钮输入、长按输入等。可选的，触摸屏1131可包括触摸传感器(Touch Sensor)和/或压力传感器(Force Sensor)，用以检测用户的触摸信号和/或压力信号，并将触摸信号转换成触点坐标、手势轨迹以及其他触摸信息，将压力信号转换为压力值以及其他信息，然后传送以上信息至处理器1180，并能接收处理器1180发来的命令并加以执行。此外，可以采用电阻式、电容式、红外线以及表面声波等多种类型实现触摸屏1131。除了触摸屏1131，输入单元1130还可以包括其他输入设备1132。具体地，其他输入设备1132可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆等中的一种或多种。
显示单元1140可用于显示由用户输入的信息或提供给用户的信息以及通信设备的各种菜单。显示单元1140可包括显示屏1141，可选的，可以采用液晶显示器(Liquid Crystal Display，LCD)、有机发光二极管(Organic Light-Emitting Diode，OLED)等形式来配置显示屏1141。进一步的，触摸屏1131可覆盖于显示屏1141之上，当触摸屏1131检测到在其上或附近的触摸操作后，传送给处理器1180以确定触摸事件的类型，随后处理器1180根据触摸事件的类型在显示屏1141上提供相应的视觉输出。虽然在图1中，触摸屏1131与显示屏1141是作为两个独立的部件来实现通信设备的输入和输出功能，但是在某些实施例中，可以将触摸屏1131与显示屏1141集成而实现通信设备的输入和输出功能。
通信设备还可包括至少一种传感器1150，比如压力传感器、光传感器、运动传感器以及其他传感器。压力传感器除了可以位于触摸屏中，还可以位于通信设备的侧边框处，当侧边框受到挤压时，压力传感器即可检测该挤压的压力值。光传感器可包括环境光传感器及接近传感器，其中，环境光传感器可根据 环境光线的明暗来调节显示屏1141的亮度，光传感器可在通信设备移动到耳边时，关闭显示屏1141和/或背光。作为运动传感器的一种，加速度传感器可检测各个方向上(一般为三轴)加速度的大小，静止时可检测出重力的大小及方向，可用于识别通信设备姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等；至于通信设备还可配置的陀螺仪、气压计、湿度计、温度计、红外线传感器等其他传感器，在此不再赘述。虽然图1示出了传感器1150，但是可以理解的是，其并不属于通信设备的必须构成，完全可以根据需要在不改变发明的本质的范围内而省略。
音频电路1160、扬声器1161以及传声器1162可提供用户与通信设备之间的音频接口。音频电路1160可将接收到的音频数据转换后的电信号，传输到扬声器1161，由扬声器1161转换为声音信号输出；另一方面，传声器1162将收集的声音信号转换为电信号，由音频电路1160接收后转换为音频数据，再将音频数据输出处理器1180处理后，经RF电路1110以发送给比如另一通信设备，或者将音频数据输出至存储器1120以便进一步处理。
WIFI电路1170，属于短距离无线传输技术，通信设备通过WIFI电路1170可以帮助用户收发电子邮件、浏览网页和访问流式媒体等，它为用户提供了无线的宽带互联网访问。
处理器1180是通信设备的控制中心，利用各种接口和线路连接整个通信设备的各个部分，通过运行或执行存储在存储器1120内的软件程序和/或模块，以及调用存储在存储器1120内的数据，执行通信设备的各种功能和处理数据，从而对通信设备进行整体监控。可选的，处理器1180可包括一个或多个处理单元；优选的，处理器1180可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器1180中。
通信设备还包括给各个部件供电的电源1190(比如电池)，优选的，电源可以通过电源管理系统与处理器1180逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。
尽管未示出，通信设备还可以包括摄像头、蓝牙模块、GPS模块等，在此不再赘述。
图2为本发明实施例图1中WIFI电路的结构示意图，如图2所示，WIFI电路1170包括WIFI芯片11、WIFI功率放大电路12、电压源13、带通滤波 器14以及天线15。WIFI芯片11与WIFI功率放大电路12以及电压源13连接，电压源13还与WIFI功率放大电路12连接，带通滤波器14连接在WIFI功率放大电路12和天线15之间。上行数据传输时，WIFI芯片11将数据传输至WIFI功率放大电路12，同时WIFI芯片11控制电压源13向WIFI功率放大电路12提供工作电压，以使WIFI功率放大电路12在该工作电压下进行放大处理，然后经带通滤波器14滤波后经天线15发送出去。下行数据传输时，天线15接收的数据经带通滤波器14滤波后传输至WIFI功率放大电路12，WIFI芯片11控制电压源13向WIFI功率放大器12提供工作电压，WIFI功率放大电路12在该工作电压下进行放大处理后传输至WIFI芯片11。
在本发明实施例中，WIFI芯片11用于：确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路12的最低供电电压；向WIFI功率放大电路12提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。其中，WIFI芯片11控制电压源13向WIFI功率放大电路12提供工作电压进行数据传输。WIFI通信速率即为通信设备的物理层速率。
在本发明实施例中，用户开启通信设备的WIFI通信功能，WIFI芯片11检测是否有数据传输请求，如果有数据传输请求，则根据信道状态确定WIFI功率放大电路12的实际发射功率。其中，信道状态包括通信设备10的WIFI通信速率、接收信号强度以及误报率等相关。例如，通信设备离WIFI访问接入点较近，WIFI信号质量较好，则WIFI功率放大电路12的发射功率可以降低，亦即WIFI功率放大电路12的工作电压可以降低。
WIFI芯片11根据信道状态确定WIFI功率放大电路12的实际发射功率包括：检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率。根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度、WIFI通信速率分别与实际发射功率存在趋势性的负相关关系，即接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。也即在其他条件，如接收信号强度等，不变时，WIFI通信速率大，实际发射功率越小。其他条件，如WIFI通信速率等，不变时，接收信号强度越大，实际发射功率越小。虽然前面描述了接收信号强度、WIFI通信速率分别与实际发射功率存在趋势性的负相关关系，但本发明并不对具体的负相关关系进行限制，比如，如接收信号强度等不变时，存在A、B、C三个依次增加的WIFI通信速率，即A＜B＜C，其对应的实际发射功率分别为a、b、c， 则a、b、c三者关系可以是a＞b＞c，还可以是a＝b＞c。
具体地，WIFI芯片11在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，将预设发射功率定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均相对应一个预设发射功率。通信设备以该实际发射功率向WIFI访问接入点传输数据时产生的误包率低于预设上限阈值。
在本发明实施例中，WIFI芯片11确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路12的最低供电电压时，在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压。其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系。每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率。参见表1，WIFI通信协议固定时，WIFI通信速率、调制方式、编码率以及误差向量幅度(Error Vector Magnitude，EVM)固定，进而可以根据误差向量幅度(Error Vector Magnitude，EVM)指标要求，或者EVM预留一定裕量的前提下确定最大发射功率。
表1 不同WIFI通信速率下的最大发射功率
Figure PCTCN2015100118-appb-000001
表1中，BPSK表示双相移相键控调制，QPSK表示正交相移键控调制。QAM表示正交振幅调制，16、64、256表示调制阶数。为了提高频谱利用率和 物理层速率，电气和电子工程师协会(Institute of Electrical and Electronics Engineers，IEEE)标准中引入了64QAM、256QAM等更高阶调制方式。通信设备WIFI通信速率如表1所示，可以看出根据IEEE 802.11ac协议，调制阶数越高，对EVM指标要求越严格，在WIFI功率放大电路12的效率固定的情况下，满足对应WIFI通信速率的最大发射功率越低。
值得说明的是，上述表1所示的不同WIFI通信速率下的最大发射功率，仅仅是一种举例说明，根据协议的变化、使用环境的不同、设备的差异可以有不同的最大发射功率。
电压映射表参见表2。表2中，第一行表示不同的WIFI协议下不同的WIFI通信速率，表格中的数值，如16、15、14等表示满足该WIFI通信速率以及对应的最低供电电压下的WIFI功率放大电路12的最大发射功率。第一列Vi表示满足对应WIFI通信速率、最大发射功率下的WIFI功率放大电路12的最低供电电压，其中，VCC_max表示最大供电电压，Delta表示两相邻供电电压之间的电压差，其值可以自由设置。11b、g、n、ac表示不同的WIFI协议，1M、6M、…、MCS8、MCS9表示物理层速率。
表2 WIFI通信速率、最大发射功率及最低供电电压映射表
Figure PCTCN2015100118-appb-000002
在表2中，一定WIFI通信速率下，与最大发射功率对应的最低供电电压为满足WIFI功率放大电路12发出该最大发射功率的最低供电电压。向WIFI功率放大电路12提供的供电电压不低于电压映射表中与该最低供电电压，都能满足WIFI功率放大电路12发出该最大发射功率的要求。例如，在11b/1M的WIFI 通信速率条件下，最大发射功率为14dBm时，WIFI功率放大电路12的最低供电电压为VCC_max-2*Delta，而以高于或等于该最低供电电压的电压VCC_max-Delta和VCC_max为WIFI功率放大电路12的工作电压，都能满足WIFI功率放大电路12发出发射功率为14dBm的要求。其中最大供电电压即为VCC_max。
值得说明的是，上述表2所示的WIFI通信速率、最大发射功率及最低供电电压映射关系，仅仅是一种举例说明，根据协议的变化、使用环境的不同、设备的差异可以有不同。
在本发明实施例中，WIFI芯片11在向WIFI功率放大电路12提供工作电压进行数据传输之后，判断数据传输是否成功，若传输失败，则控制电压源13向WIFI功率放大电路提供最大供电电压作为WIFI功率放大电路12的实际工作电压重新传输数据。若传输成功，则判断数据是否已经传输完成。如果已经传输完成，则结束本次数据的传输，停止向WIFI功率放大电路12供电。如果没有全部传输完成，则重新确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路12的最低供电电压以继续进行未完成数据的传输。本发明实施例中，可以通过在传输的数据中设置校验位用于判断数据传输是否成功，以及在数据末尾设置标志位用于判断数据是否已经传输完成，当然也可以是其他的方法，在此不作限制。
本发明实施例中，WIFI芯片11根据WIFI通信速率、WIFI功率放大电路12的实际发射功率通过查找电压映射表确定在满足该实际发射功率下的WIFI功率放大电路12的最低供电电压，向WIFI功率放大电路12提供该供电电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压，如此根据WIFI功率放大电路12的实际发射功率动态调整WIFI功率放大电路12的供电电压，降低了WIFI功耗，延长通信设备的使用时长，提高了用户体验。
以上各实施例中，可以选择最低供电电压，此时功耗最低，也可以选择比最低供电电压高且小于最大供电电压的任一供电电压。当然，如果上述电压还不能满足通信要求，则还可以选择最大供电电压。
此外，实际发射功率的选择，可以按照上述实施例中通过查找功率映射表得到，还可以不考虑接收信号强度，直接选择设备中的预设发射功率。
图3是图1中的第一实施例的降低通信设备功耗的装置的结构示意图。装 置20包括电压确定模块21和供电模块22。电压确定模块21用于确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压。供电模块22与电压确定模块21连接，用于向WIFI功率放大电路提供工作电压进行数据传输，工作电压不低于最低供电电压的电压且低于最大供电电压。
优选地，电压确定模块21用于：在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压。其中，电压映射表具体参见上述表2。电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
参见图4，装置20还包括判断模块23和检测模块24。电压确定模块21确定满足WIFI通信速率、实际发射功率下的WIFI功率放大器的最低供电电压的步骤是在满足预设条件下进行的，预设条件是：检测模块24检测到有数据传输请求。如果检测模块24没有检测到通信设备有数据传输请求时，则供电模块22停止向WIFI功率放大电路进行供电。
参见图5，装置20还包括功率确定模块25。在电压确定模块21确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压之前，功率确定模块21用于：检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率。根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。具体地，电压确定模块21进一步在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，确定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均相对应一个预设发射功率。通信设备以实际发射功率向WIFI访问接入点传输数据时产生的误包率小于预设上限阈值。
在供电模块22向WIFI功率放大电路提供工作电压进行数据传输之后，判断模块23用于：判断数据传输是否成功。若传输失败，则供电模块22以最大供电电压作为WIFI功率放大电路的实际工作电压重新传输数据。若传输成功，则判断数据是否传输完成，如果已经传输完成，则供电模块22停止向WIFI功率放大电路供电，即WIFI功率放大电路的供电电压为0。如果数据未传输完成， 则电压确定模块21重新确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压，以继续进行数据传输。本发明实施例中，可以通过在传输的数据中设置校验位用于判断数据传输是否成功，以及在数据末尾设置标志位用于判断数据是否已经传输完成，当然也可以是其他的方法，在此不作限制。如此，本发明实施例根据WIFI功率放大电路发送数据所需要的发射功率，动态调整WIFI功率放大电路的供电电压，能够降低通信设备的功耗，延长通信设备的使用时间，改善用户体验。
如图6所示，以手机为例，纵坐标为通信设备电池端的电流，横坐标为WIFI功率放大器的实际发射功率，以WIFI 5G 54M为例，在接收信号强度在-55dBm以上，手机的发射功率10dBm可以满足正常的吞吐率需求，电池端电流节省约51％，WIFI功率放大电路的工作电压从4.2V降低到1.8V，发射功率维持为10dBm，功耗降幅约51％。
本发明实施例的装置可以应用于WIFI通信系统，或正交频分复用调制的多速率通信系统中。
图7本发明第一实施例的降低通信设备功耗的方法的流程示意图。如图7所示，本发明实施例的降低通信设备功耗的方法包括：
S10：确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压。
S10是在满足预设条件下进行的，预设条件是：检测到有数据传输请求。如果没有检测到通信设备有数据传输请求时，则停止向WIFI功率放大电路进行供电。
在S10之前，根据信道状态确定WIFI功率放大电路的实际发射功率。信道状态还与接收信号强度以及误报率等相关。例如，通信设备离WIFI访问接入点较近，WIFI信号质量较好，则WIFI功率放大电路的发射功率可以降低，亦即WIFI功率放大电压的供电电压可以降低。S10之前，包括：检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率；根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。具体地，在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，确定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均相对应一个预设发射功率。以实际发射 功率向WIFI访问接入点传输数据时产生的误包率小于预设上限阈值。
在S10中，在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压。其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
S11：向WIFI功率放大电路提供工作电压进行数据传输，工作电压为不低于最低供电电压的电压，且低于最大供电电压。
在向WIFI功率放大电路提供工作电压进行数据传输之后，方法还包括：
判断数据传输是否成功，若传输失败，则以最大供电电压作为WIFI功率放大电路的实际工作电压重新传输数据。若传输成功，则判断数据是否传输成功；如果传输失败，则以最大供电电压作为WIFI功率放大器的实际工作电压重新传输数据；如果传输成功，则判断数据是否发送完成，如果数据已经发送完成，则停止对WIFI功率放大器进行供电，即向WIFI功率放大器输出的电压为0，并继续检测是否有数据传输请求。具体地参见图8。
S200：WIFI打开，连接上AP。即打开通信设备的WIFI功能。
S201：是否有数据传输。如果是，则执行S202；如果否，则执行S203。
S202：根据当前的信道状态确定通信设备中WIFI功率放大器的实际发射功率。
其中，信道状态包括通信设备的物理层速率。在本发明实施例中，信道状态还与接收信号强度以及误报率等相关。例如，通信设备离WIFI访问接入点较近，WIFI信号质量较好，则WIFI功率放大电路的发射功率可以降低，亦即WIFI功率放大电路的供电电压可以降低。
在S202中，检测来自WIFI访问接入点的接收信号强度，并检测通信设备向WIFI访问接入点传输数据的WIFI通信速率。根据接收信号强度和WIFI通信速率确定实际发射功率，其中，接收信号强度越大，实际发射功率越小，WIFI通信速率越大，实际发射功率越小。具体地，在功率映射表中查找到与接收信号强度、WIFI通信速率对应的预设发射功率，确定为WIFI功率放大电路的实际发射功率，其中在功率映射表中，相同接收信号强度下每个数据传输速率均 相对应一个预设发射功率。其中，以实际发射功率向WIFI访问接入点传输数据时产生的误包率小于预设上限阈值。跳到S204。
S203：供电电压Vcc＝0。没有数据传输时，默认通信设备中的WIFI功率放大电路的供电电压为0，即停止向WIFI功率放大电路供电，跳到S201。
S204：确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压。
在S204中，在电压映射表中查找对应WIFI通信速率、实际发射功率的最低供电电压。其中，电压映射表记录有WIFI通信速率、最大发射功率及最低供电电压之间的一一映射关系，每个WIFI通信速率下对应至少两个不同的最大发射功率，至少两个不同的最大发射功率分别对应于不同的最低供电电压，最大发射功率是由WIFI通信协议所定义的最低供电电压与WIFI通信速率下能够实现的最大发射功率，在电压映射表中查找对应实际发射功率是指查找与实际发射功率相同的最大发射功率。
S205：自动调整工作电压Vcc为最低供电电压Vi，向WIFI功率放大电路提供该最低工作电压进行数据传输。
S206：判断数据是否传输成功。如果传输成功，则执行S208；如果传输失败，则执行S207。
S207：工作电压Vcc＝Vmax。即调整工作电压为最大供电电压重新传输数据。
在步骤S207中，也可以调整WIFI功率放大电路的工作电压为高于最低供电电压且低于最大供电电压的任一供电电压。当然如果上述电压还不能满足通信要求，则还可以选择最大供电电压作为WIFI功率放大电器的工作电压。
S208：数据是否传输完成。如果是，则返回S201；如果否，则返回S202。如果数据已经传输完成，则结束本次数据的传输，返回S201，判断是否有数据传输以进行下一次数据的传输。如果数据没有全部传输完成，则重新根据当前信道状态确定WIFI功率放大电路的发射功率以根据最低供电电压继续传输未发送完成的数据。本发明实施例中，可以通过在传输的数据中设置校验位用于判断数据传输是否成功，以及在数据末尾设置标志位用于判断数据是否已经传输完成，当然也可以是其他的方法，在此不作限制。
在本发明实施例中，该方法应用于WIFI通信系统，或正交频分复用调制的多速率通信系统中。
综上所述，本发明通过确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；向WIFI功率放大电路提供工作电压进行数据传输，工作电压不低于最低供电电压的电压且低于最大供电电压，能够根据通信设备发送数据所需要的发射功率动态调整通信设备中功率放大器的供电电压，降低通信系统的功耗。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (16)

  1. 一种降低通信设备功耗的方法，其特征在于，所述方法包括：
    确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；
    向所述WIFI功率放大电路提供工作电压进行数据传输，所述工作电压为不低于所述最低供电电压的电压，且低于最大供电电压。
  2. 根据权利要求1所述的方法，其特征在于，所述确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压，包括：
    在电压映射表中查找对应所述WIFI通信速率、实际发射功率的最低供电电压；
    其中，所述电压映射表记录有所述WIFI通信速率、最大发射功率及所述最低供电电压之间的一一映射关系，每个所述WIFI通信速率下对应至少两个不同的所述最大发射功率，所述至少两个不同的所述最大发射功率分别对应于不同的所述最低供电电压，所述最大发射功率是由WIFI通信协议所定义的所述最低供电电压与所述WIFI通信速率下能够实现的最大发射功率，所述在所述电压映射表中查找对应所述实际发射功率是指查找与所述实际发射功率相同的所述最大发射功率。
  3. 根据权利要求2所述的方法，其特征在于，所述向所述WIFI功率放大电路提供工作电压进行数据传输之后，所述方法还包括：
    判断所述数据传输是否成功，若传输失败，则以所述最大供电电压作为所述WIFI功率放大电路的实际工作电压重新传输所述数据。
  4. 根据权利要求1所述的方法，其特征在于，所述确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压的步骤是在满足预设条件下进行的，所述预设条件是：
    所述通信设备检测到有数据传输请求。
  5. 根据权利要求1至4任一项所述的方法，其特征在于，所述确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压之前，所述方法包括：
    检测来自WIFI访问接入点的接收信号强度，并检测所述通信设备向所述 WIFI访问接入点传输数据的所述WIFI通信速率；
    根据所述接收信号强度和所述WIFI通信速率确定所述实际发射功率，其中，所述接收信号强度越大，所述实际发射功率越小，所述WIFI通信速率越大，所述实际发射功率越小。
  6. 根据权利要求5所述的方法，其特征在于，所述根据所述接收信号强度和所述WIFI通信速率确定所述实际发射功率，包括：
    在功率映射表中查找到与所述接收信号强度、所述WIFI通信速率对应的预设发射功率，将所述预设发射功率定为所述实际发射功率，其中在所述功率映射表中，相同所述接收信号强度下每个WIFI通信速率均相对应一个所述预设发射功率。
  7. 一种降低通信设备功耗的装置，其特征在于，所述装置包括：
    电压确定模块，用于确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压；
    供电模块，与所述电压确定模块连接，用于向所述WIFI功率放大电路提供工作电压进行数据传输，所述工作电压为不低于所述最低供电电压的电压，且低于最大供电电压。
  8. 根据权利要求7所述的装置，其特征在于，所述装置进一步包括存储模块，所述存储模块用于存储电压映射表，所述电压确定模块用于：
    在所述电压映射表中查找对应所述WIFI通信速率、实际发射功率的最低供电电压；
    其中，所述电压映射表记录有所述WIFI通信速率、最大发射功率及所述最低供电电压之间的一一映射关系，每个所述WIFI通信速率下对应至少两个不同的所述最大发射功率，所述至少两个不同的所述最大发射功率分别对应于不同的所述最低供电电压，所述最大发射功率是由WIFI通信协议所定义的所述最低供电电压与所述WIFI通信速率下能够实现的最大发射功率，所述在所述电压映射表中查找对应所述实际发射功率是指查找与所述实际发射功率相同的所述最大发射功率。
  9. 根据权利要求8所述的装置，其特征在于，所述装置还包括判断模块，所述判断模块用于：
    判断所述数据传输是否成功，若传输失败，则所述供电模块以所述最大供电电压作为所述WIFI功率放大电路的实际工作电压重新传输所述数据。
  10. 根据权利要求7所述的装置，其特征在于，所述装置还包括检测模块，所述电压确定模块确定满足WIFI通信速率、实际发射功率下的WIFI功率放大电路的最低供电电压的步骤是在满足预设条件下进行的，所述预设条件是：
    所述检测模块检测到有数据传输请求。
  11. 根据权利要求7-10任一项所述的装置，其特征在于，所述装置还包括功率确定模块，所述功率确定模块用于：
    检测来自WIFI访问接入点的接收信号强度，并检测所述通信设备向所述WIFI访问接入点传输数据的所述WIFI通信速率；
    根据所述接收信号强度和所述WIFI通信速率确定所述实际发射功率，其中，所述接收信号强度越大，所述实际发射功率越小，所述WIFI通信速率越大，所述实际发射功率越小。
  12. 根据权利要求11所述的装置，其特征在于，所述功率确定模块用于：
    在功率映射表中查找到与所述接收信号强度、所述WIFI通信速率对应的预设发射功率，确定为所述WIFI功率放大电路的所述实际发射功率，其中在所述功率映射表中，相同所述接收信号强度下每个数据传输速率均相对应一个所述预设发射功率。
  13. 一种通信设备，其特征在于，
    所述通信设备包括WIFI电路，所述WIFI电路包括：WIFI功率放大电路、电压源及WIFI芯片，所述WIFI芯片分别连接所述WIFI功率放大电路和所述电压源，所述电压源连接所述WIFI功率放大电路；
    所述WIFI芯片确定满足WIFI通信速率、实际发射功率下的所述WIFI功率放大电路的最低供电电压，并控制所述电压源向所述WIFI功率放大电路提供工作电压进行数据传输，所述工作电压为不低于所述最低供电电压的电压，且低于最大供电电压。
  14. 根据权利要求13所述的通信设备，其特征在于，所述WIFI芯片用于：
    在电压映射表中查找对应所述WIFI通信速率、实际发射功率的最低供电电压；
    其中，所述电压映射表记录有所述WIFI通信速率、最大发射功率及所述最低供电电压之间的一一映射关系，每个所述WIFI通信速率下对应至少两个不同的所述最大发射功率，所述至少两个不同的所述最大发射功率分别对应于不同的所述最低供电电压，所述最大发射功率是由WIFI通信协议所定义的所述最低 供电电压与所述WIFI通信速率下能够实现的最大发射功率，所述在所述电压映射表中查找对应所述实际发射功率是指查找与所述实际发射功率相同的所述最大发射功率。
  15. 根据权利要求13或14所述的通信设备，其特征在于，
    所述WIFI芯片进一步检测WIFI访问接入点的接收信号强度，并检测所述通信设备向所述WIFI访问接入点传输数据的所述WIFI通信速率；
    在功率映射表中查找到与所述接收信号强度、所述WIFI通信速率对应的预设发射功率，确定为所述WIFI功率放大电路的所述实际发射功率，其中在所述功率映射表中，相同所述接收信号强度下每个WIFI通信速率均相对应一个预设发射功率。
  16. 根据权利要求15所述的通信设备，其特征在于，所述WIFI芯片进一步在功率映射表中查找到与所述接收信号强度、所述WIFI通信速率对应的预设发射功率，确定为所述WIFI功率放大电路的所述实际发射功率，其中在所述功率映射表中，相同所述接收信号强度下每个数据传输速率均相对应一个所述预设发射功率。
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