WO2015021784A1 - Procédé et terminal pour ajuster une puissance d'émission wifi - Google Patents

Procédé et terminal pour ajuster une puissance d'émission wifi Download PDF

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Publication number
WO2015021784A1
WO2015021784A1 PCT/CN2014/075455 CN2014075455W WO2015021784A1 WO 2015021784 A1 WO2015021784 A1 WO 2015021784A1 CN 2014075455 W CN2014075455 W CN 2014075455W WO 2015021784 A1 WO2015021784 A1 WO 2015021784A1
Authority
WO
WIPO (PCT)
Prior art keywords
wifi
transmission power
current
rssi value
power
Prior art date
Application number
PCT/CN2014/075455
Other languages
English (en)
Chinese (zh)
Inventor
白剑
Original Assignee
惠州Tcl移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 惠州Tcl移动通信有限公司 filed Critical 惠州Tcl移动通信有限公司
Publication of WO2015021784A1 publication Critical patent/WO2015021784A1/fr

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Classifications

    • 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
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • 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]
    • H04W52/262—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account adaptive modulation and coding [AMC] scheme
    • 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 technologies, and in particular, to a WIFI transmit power adjustment method and terminal. Background technique
  • WIFI Wireless Fidelity
  • the WIFI module can connect the terminal to the network through radio waves within the effective range, without wiring or wiring conditions. Therefore, this WIFI access method It is favored by more and more users. However, the WIFI module consumes a lot of power, and if it is used more frequently, it will accelerate the loss of battery power.
  • the WIFI module does not introduce a power control mechanism, that is, the WIFI module of the existing terminal transmits data with a fixed transmission power (a value between 12 dBm and 20 dBm).
  • a fixed transmission power a value between 12 dBm and 20 dBm.
  • the transmit power based on the existing terminal WIFI is fixed, and there is no relevant mechanism to adjust the size of the transmit power, and the power control is automatically performed. If the distance between the terminal and the wireless hotspot is very close, the transmission power at this time is relatively large, which is equivalent to wasting some power and increasing power consumption. If the distance between the terminal and the wireless hotspot is very long, the transmission power at this time is relatively small, and the signal may be unstable, resulting in data transmission being more convincing or even transmission failure. Summary of the invention
  • the method and terminal for adjusting the WIFI transmit power are used to solve the problem that the existing terminal cannot adjust the WIFI transmit power, resulting in increased power consumption and large power consumption.
  • a method for adjusting WIFI transmit power which includes:
  • the terminal detects the current WIFI system and the modulation mode, and controls the WIFI module to obtain the RSSI value of the current WIFI hotspot every first preset time;
  • the C and WIFI modules transmit according to the WIFI transmit power.
  • the method for calculating the current WIFI transmission power includes a table lookup method and a calculation method.
  • the look-up table method includes: querying, according to the RSSI value, a corresponding WIFI transmit power in a transmit power correspondence table, and outputting the WIFI transmit power to the WIFI module.
  • the method further includes storing the transmit power correspondence table and storing the data in a non-volatile memory; the transmit power correspondence table includes a WIFI system and a modulation mode. Related data, the range of values of the RSSI value and the range of values of the corresponding WIFI transmit power.
  • the calculation method includes: B l, the terminal communicates with the WIFI hotspot to obtain the current reported transmission power of the WIFI hotspot, and queries the demodulation threshold of the WIFI hotspot;
  • the WIFI emission power calculation formula is:
  • TXPowr THR demod + Pathloss
  • Pathloss is the space loss
  • Power A P , r , rt is the current reported transmit power of the WIFI hotspot
  • PmV ⁇ P is RS S i
  • T ⁇ mcd is the demodulation threshold
  • TXP is hidden
  • the method further includes:
  • B5. Determine whether the packet loss rate is greater than an adjustment threshold; increase the WIFI transmit power when the packet loss rate is greater than the adjustment threshold, and decrease the WIFI transmit power when the packet loss rate is less than the adjustment threshold.
  • the WIFI transmission power is increased or decreased according to the preset step size.
  • a method for adjusting WIFI transmit power wherein:
  • the terminal detects the current WIFI system and modulation mode. Controlling the WIFI module to obtain the RSSI value of the current WIFI hotspot every first preset time;
  • the method for calculating the current WIFI transmit power includes a lookup table method and a calculation method;
  • the lookup table method includes: The RSSI value is used to query the corresponding WIFI transmit power in the transmit power correspondence table, and output the WIFI transmit power to the WIFI module;
  • the calculation method includes:
  • the terminal communicates with the WIFI hotspot to obtain the current reported transmit power of the WIFI hotspot, and queries the demodulation threshold of the WIFI hotspot;
  • the C and WIFI modules transmit according to the WIFI transmit power.
  • the method for adjusting the WIFI transmit power wherein before the table lookup, the transmit power correspondence table is set and stored in the non-volatile memory.
  • the method for adjusting the WIFI transmit power wherein, before the step A, further comprising storing the transmit power correspondence table; the transmit power correspondence table includes related data of a WIFI system and a modulation mode, and a value of the RSSI value The range and the range of WIFI transmit power corresponding to it.
  • the method for adjusting the WIFI transmit power wherein, after the step B3, the method further includes:
  • B5. Determine whether the packet loss rate is greater than an adjustment threshold; increase the WIFI transmit power when the packet loss rate is greater than the adjustment threshold, and decrease the WIFI transmit power when the packet loss rate is less than the adjustment threshold.
  • the method for adjusting the WIFI transmit power wherein, in the step B5, the WIFI transmit power is increased or decreased according to a preset step size.
  • a terminal for implementing the method for adjusting a WIFI transmit power comprising:
  • the CPU is used to detect the current WIFI system and the modulation mode when the WIFI module is enabled, and control the WIFI module to obtain the RSSI value of the current WIFI hotspot every first preset time; on the other hand, the current WIFI is used according to the current WIFI.
  • the system, modulation mode and RSSI value obtain the current WIFI transmit power;
  • the WIFI module is configured to detect the RSSI value of the current WIFI hotspot and transmit it to the CPU; on the other hand, to transmit according to the WIFI transmit power;
  • the first timer is configured to set a first preset time.
  • the terminal further includes:
  • a non-volatile memory configured to store a transmit power correspondence table
  • the second timer is configured to set a second preset time.
  • the WIFI transmit power adjustment method and the terminal provided by the present invention detect the current WIFI system and the modulation mode when the WIFI module is turned on, and acquire the RSSI value of the WIFI hotspot every first preset time. According to the current WIFI system, modulation mode and RSSI value, the current more suitable WIFI transmit power is calculated, and the control WIFI module transmits according to the WIFI transmit power, thereby achieving the effect of dynamically adjusting the WIFI transmit power according to the RSSI value, thereby saving The power consumption of WIFI improves the terminal's battery life.
  • FIG. 1 is a flow chart of a method for adjusting WIFI transmit power according to the present invention.
  • FIG. 2 is a structural block diagram of a terminal of the present invention. detailed description
  • the invention provides a method and a terminal for adjusting the WIFI transmit power, and can calculate the most suitable WIFI transmit power according to the currently used WIFI standard, modulation mode and RSSI (Received Signal Strength Indication) value, and then control
  • the WIFI module uses the WIFI transmit power to transmit to save power.
  • the terminal of the present invention is a smartphone, a tablet, a notebook, and the like. Please refer to the picture
  • the method for adjusting the WIFI transmit power includes:
  • the terminal detects the current WIFI system and the modulation mode, and controls the WIFI module to obtain the RSSI value of the current WIFI hotspot every first preset time.
  • the WIFI system indicates the WIFI standard currently used by the terminal, such as 802.11a (54Mbps), 802.11b (11Mbps), or 802.11g (54Mbps), which is the wireless network protocol.
  • the modulation mode corresponds to the WIFI system, and the data is basically fixed.
  • the terminal can detect the specific data of the modulation mode and the WIFI system, which is a prior art, and the present invention does not limit this.
  • S200 calculates the matching WIFI transmit power according to the current WIFI system, modulation mode and RSSI value.
  • the S300 and the WIFI module transmit according to the WIFI transmission power.
  • the method of calculating the current WIFI transmission power includes a look-up table method and a calculation method. Take the smart phone as an example to illustrate how to use the look-up table method and calculation method to obtain the most suitable WIFI transmit power.
  • the look-up table method includes: querying, according to the RSSI value, a corresponding WIFI transmit power in a transmit power correspondence table, and outputting the WIFI transmit power to a WIFI module.
  • the transmit power correspondence table Before the table lookup, the transmit power correspondence table needs to be set and stored in the non-volatile memory; the transmit power correspondence table includes related data of the WIFI system and the modulation mode. The range of values of the RSSI value and the range of values of the corresponding WIFI transmit power.
  • the setting of the transmission power correspondence table is as shown in Table 1 below.
  • the RSSI in Table 1 indicates the signal strength of the WIFI hotspot received by the terminal, and the terminal controls the WIFI module to detect the RSSI value once every first preset time (such as 3s), which is changed.
  • the WIFI system and modulation method are related to the type of WIFI module currently used.
  • the type of WIFI module is determined by the manufacturer, which determines the parameters of the WIFI system and modulation mode.
  • the RSSI value corresponds to the WIFI system and the modulation method, and the corresponding manner is as shown in Tables 1 and 2 above, which is a prior art.
  • the invention mainly sets the correspondence between the RSSI value and the transmission power.
  • the transmit power is also greater than or equal to 21 dBm; when the RSSI value is less than -80 dBm and greater than or equal to -70 dBm, the transmit power is Any value from 19dBm to 21dBm, preferably equal to 19dBm; when the RSSI value is less than -70 dBm and greater than or equal to -65dBm, the transmit power is any value from 17dBm to 19dBm, preferably equal to 17dBm; when the RSSI value is less than - When the 65 dBm is greater than or equal to -60 dBm, the transmit power is any value from 15 dBm to 17 dBm, preferably equal to 15 dBm; when the RSSI value is less than -60 dBm and greater than -55 dBm, the transmit power is any value from 12 dBm to 15 dBm; When the RSSI value is less than
  • the calculation method includes:
  • Step 201 The terminal communicates with the WIFI hotspot to obtain the current reported transmit power of the WIFI hotspot, and queries the demodulation threshold of the WIFI hotspot;
  • Step 202 Calculate a spatial loss according to the RSSI value and the reported transmit power.
  • Step 203 Calculate a current WIFI transmit power according to a demodulation threshold and a spatial loss.
  • rt and THR dem d are constant. They are related to the modulation system and demodulation mode. You can query the data sheet of the WIFI module. The value of PmVi ⁇ p is obtained by the terminal controlling the WIFI module every first preset time.
  • the signal received by the receiving end (such as the WIFI hotspot) should not be lower than the demodulation threshold to correctly demodulate the received signal; at the same time, the signal has a certain loss in the space transmission process. Therefore, the minimum value of WIFI transmit power should be the sum of the space loss and the demodulation threshold. In this way, based on the current RSSI value, the unique WIFI transmit power is calculated, which improves the efficiency of the transmission and saves power consumption.
  • the foregoing calculation process may be completed in combination with the packet loss rate, and after the step 203, the method further includes:
  • Step 204 Count a packet loss rate in a second preset time period
  • Step 205 Determine whether the packet loss rate is greater than an adjustment threshold; increase the WIFI transmit power when the packet loss rate is greater than the adjustment threshold, and decrease the WIFI when the packet loss rate is less than the adjustment threshold. Transmit power.
  • each time a terminal transmits a set of data (each group of data is a data packet), the WIFI hotspot will decode. If the WIFI hotspot successfully receives the data, it will return ACK (Acknowledgement, confirmation character). If the data reception fails, a NACK (Negative Acknowledgement) is returned. Data reception failure is also called data loss because the data is not transmitted to the WIFI hotspot or only part of the data is transmitted. By calculating the ratio of the number of lost packets to the transmitted packet, that is, the packet loss rate, it is possible to more accurately determine whether the current WIFI transmission power is appropriate.
  • the terminal counts the probability of occurrence of all NACKs in the second preset time (such as 3s), that is, the packet loss rate.
  • the preset step size is increased or decreased.
  • the step size of the ldB can be increased or decreased every time.
  • the WIFI transmission power thus obtained is based on the actual data reception condition, and can continuously and dynamically adjust the WIFI transmission power in real time, further improving the calculation accuracy and allowing the terminal to be in an optimal power consumption state.
  • the RSSI value and its corresponding WIFI transmit power can be written into the transmit power correspondence table, so as to improve the transmit power correspondence table, Table can get WIFI launch Power, which shortens the calculation time and speeds up the transmission.
  • the embodiment of the present invention further provides a terminal.
  • the CPU 10 includes a CPU 10, a WIFI module 20, and a first timer 30.
  • the CPU 10 is connected to the WIFI module 20. And the first timer 30.
  • the first timer 30 is used to set the first preset time.
  • the CPU 10 detects the current WIFI system and the modulation mode when the WIFI module 20 is turned on, and controls the WIFI module to obtain the RSSI value of the current WIFI hotspot every first preset time; on the other hand, according to the current WIFI standard.
  • the modulation mode and the RSSI value calculate the matching WIFI transmit power.
  • the WIFI module 20 is configured to detect the RSSI value of the current WIFI hotspot every first preset time according to the control of the CPU and transmit it to the CPU; and on the other hand, to transmit according to the calculated WIFI transmit power.
  • the terminal further includes a nonvolatile memory 40 for storing a transmission power correspondence table, and a second timer 50 for setting a second preset time, the nonvolatile memory 40, the second timer 50 Both are connected to the CPU 10.
  • the CPU 10 can use a WIFI baseband chip.
  • the non-volatile memory 40 can utilize the memory space in the WIFI baseband chip.
  • the present invention detects the current WIFI system and modulation mode when the WIFI module is turned on, and acquires the RSSI value of the WIFI hotspot every first preset time, according to the current WIFI standard, modulation mode, and RSSI value.
  • the WIFI transmit power is obtained by using the look-up table method or the calculation method, and the WIFI module is controlled to transmit according to the WIFI transmit power, thereby achieving the effect of dynamically adjusting the WIFI transmit power according to the RSSI value, improving the transmission efficiency and saving power consumption.
  • the terminal is in the best power consumption state, and the continuation of the terminal is improved. Flight time.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un terminal pour ajuster une puissance d'émission WiFi (technologie WiFi). Le procédé comprend les étapes suivantes : A) lors de l'activation d'un module WiFi, un terminal détecte la norme WiFi et un mode de modulation actuels, et commande le module WiFi pendant un intervalle d'un premier temps prédéterminé pour obtenir une valeur d'indicateur d'intensité de signal reçu (RSSI) (S100) du point d'accès WiFi actuel ; B) calculer la puissance d'émission WiFi correspondante en fonction de la norme WiFi, du mode de modulation et de la valeur RSSI (S200) actuels ; C) le module WiFi émet en fonction de la puissance d'émission WiFi (S300). Le procédé de calcul de la puissance d'émission WiFi actuelle la plus appropriée en fonction de la norme WiFi, du mode de modulation et de la valeur RSSI actuels dans un mode de réalisation de la présente invention a pour effet d'ajuster de façon dynamique la puissance d'émission WiFi en fonction de la valeur RSSI, ce qui permet de réduire la consommation d'énergie WiFi et d'augmenter également la durée de vie de la batterie du terminal.
PCT/CN2014/075455 2013-08-12 2014-04-16 Procédé et terminal pour ajuster une puissance d'émission wifi WO2015021784A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310348630.3A CN103415066B (zh) 2013-08-12 2013-08-12 一种wifi发射功率的调整方法和终端
CN201310348630.3 2013-08-12

Publications (1)

Publication Number Publication Date
WO2015021784A1 true WO2015021784A1 (fr) 2015-02-19

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US9907021B2 (en) 2014-01-13 2018-02-27 Huawei Device (Dongguan) Co., Ltd. Method and apparatus for reducing power consumption
CN115209246A (zh) * 2022-06-08 2022-10-18 上海百功半导体有限公司 一种光通信设备的动态侦测系统和智能调整方法

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