WO2014154068A1 - 一种终端发射功率的调整方法、装置和终端 - Google Patents

一种终端发射功率的调整方法、装置和终端 Download PDF

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Publication number
WO2014154068A1
WO2014154068A1 PCT/CN2014/072273 CN2014072273W WO2014154068A1 WO 2014154068 A1 WO2014154068 A1 WO 2014154068A1 CN 2014072273 W CN2014072273 W CN 2014072273W WO 2014154068 A1 WO2014154068 A1 WO 2014154068A1
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WO
WIPO (PCT)
Prior art keywords
distance
terminal
human body
power adjustment
adjustment value
Prior art date
Application number
PCT/CN2014/072273
Other languages
English (en)
French (fr)
Inventor
郝彦博
钟涛
侯志强
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to AU2014243666A priority Critical patent/AU2014243666B2/en
Priority to US15/029,972 priority patent/US9655056B2/en
Publication of WO2014154068A1 publication Critical patent/WO2014154068A1/zh

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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
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/10—Radiation diagrams of antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/245—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers
    • H04B1/3833—Hand-held transceivers
    • H04B1/3838—Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones
    • H04M1/737—Characterised by transmission of electromagnetic waves other than radio waves, e.g. infrared waves
    • 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
    • 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
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283—Power depending on the position of the mobile
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/12—Details of telephonic subscriber devices including a sensor for measuring a physical value, e.g. temperature or motion

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, and a terminal for adjusting a transmission power of a terminal. Background technique
  • an embodiment of the present invention provides a method and a device for adjusting a terminal transmit power. And terminal.
  • an embodiment of the present invention provides a method for adjusting a transmit power of a terminal, including: acquiring a distance between a current human body and a terminal;
  • the obtaining the distance between the current human body and the terminal comprises: acquiring a distance between the human body and the terminal by using a sensor provided by the terminal.
  • the correspondence table includes: a distance between the human body and the terminal and a corresponding power adjustment value.
  • the power adjustment value corresponding to the distance is obtained in the correspondence between the pre-stored distance and the transmit power adjustment value according to the distance, including:
  • the distance between the human body and the terminal is the distance between the strongest point of radiation of the human body closest to the terminal.
  • an embodiment of the present invention provides a device for adjusting a transmit power of a terminal, including: obtaining an ear block, configured to acquire a distance between a current human body and a terminal;
  • the query module is configured to obtain, according to the distance, a power adjustment value corresponding to the distance in a correspondence table between a pre-stored distance and a transmit power adjustment value, where the distance is a distance between the human body and the terminal;
  • the adjustment module is configured to adjust the transmit power of the terminal according to the power adjustment value.
  • the acquiring module is configured to acquire a distance between the human body and the terminal by using a sensor provided by the terminal.
  • the correspondence table includes: a distance between the human body and the terminal and a corresponding power adjustment value.
  • the querying module is configured to determine whether the acquired distance is smaller than a maximum value of the distance recorded in the correspondence table, and obtain a judgment result; when the judgment result indicates that the acquired distance is smaller than the record in the correspondence table When the maximum value of the distance is obtained, the obtained distance is rounded, otherwise the acquisition of the distance between the human body and the terminal is returned; in the correspondence table, the power adjustment value corresponding to the distance is queried.
  • the distance between the human body and the terminal is the distance between the strongest point of radiation of the human body closest to the terminal.
  • an embodiment of the present invention provides a terminal, including an apparatus for adjusting transmit power of the terminal.
  • the method, device, and terminal for adjusting the transmit power of the terminal provided by the embodiment of the present invention, by obtaining the distance between the current human body and the terminal, and querying the power adjustment value corresponding to the distance between the current human body and the terminal, according to the queried power adjustment value, Reduce the transmit power of the antenna; adjust the antenna power output by the terminal in real time according to the distance between the human body and the terminal, so that the adjusted transmit power of the terminal antenna has both the SAR value and the user's radiation immunity, and will not It affects the user's use of the terminal; Moreover, the antenna design of the terminal does not require redundant antenna clearance or routing area, so it does not have any influence on the circuit layout of the terminal, and has the characteristics of simple principle and clear operation.
  • 1 is a flow chart showing an embodiment of a method for adjusting a transmission power of a terminal
  • FIG. 2 is a flow chart showing another embodiment of a method for adjusting a transmission power of a terminal
  • FIG. 3 is a schematic diagram showing an embodiment of an apparatus for adjusting a transmission power of a terminal; detailed description
  • the method for adjusting the transmit power of the terminal in the embodiment of the present invention includes the following steps: Step 100: Obtain a distance between the current human body and the terminal;
  • Step 101 Obtain, according to the distance, a power adjustment value corresponding to the distance in a correspondence table between a pre-stored distance and a transmission power adjustment value, where the distance is a distance between the human body and the terminal;
  • Step 102 Adjust a transmit power of the terminal according to the power adjustment value.
  • the antenna power outputted by the terminal is adjusted in real time, so that the adjusted terminal antenna transmitting power has the SAR value in accordance with the specified SAR, and the user is protected from the antenna radiation, and the user's use of the terminal is not affected.
  • the distance between the human body and the terminal is: a distance between the strongest point of the radiation of the human body closest to the terminal.
  • the method described in this embodiment may be applied to various terminals, including but not limited to: various devices having an antenna and capable of emitting electromagnetic radiation signals, such as mobile terminals such as mobile phones, tablet computers, and portable computers. And smart appliances such as microwave ovens, induction cookers, and radios.
  • mobile terminals such as mobile phones, tablet computers, and portable computers.
  • smart appliances such as microwave ovens, induction cookers, and radios.
  • a brief description is as follows: When the method described in this embodiment is applied to a mobile terminal, the mobile terminal acquires a distance from the human body through the set sensor, and then finds a power adjustment value corresponding to the acquired distance, and the mobile terminal adjusts the antenna according to the obtained power adjustment value. The transmitted power is then transmitted according to the adjusted transmit power; in this way, the user of the mobile terminal can be prevented from being protected from antenna radiation.
  • the microwave oven When the microwave is used to heat the food, the microwave oven obtains the distance from the user through the set sensor, and then finds the power adjustment value corresponding to the acquired distance. The microwave oven adjusts the power of the electromagnetic wave emitted by the magnetron according to the obtained power adjustment value, and then according to the adjustment. The power emission heats the electromagnetic waves of the food. In this way, the electromagnetic waves emitted by the microwave oven can be reduced to protect the user and protect the safety of the human body.
  • the distance between the terminal and the human body is obtained by the sensor provided by the terminal, so that the distance between the terminal and the human body can be accurately obtained, and the accuracy of the power adjustment is ensured.
  • the senor can measure the distance between the terminal and the human body by using a distance sensor existing in the terminal, and the measurement accuracy of the distance sensor has reached the level of millimeters (mm) or more, so the accuracy of the distance measurement can be completely ensured, and the terminal is used.
  • the existing equipment measures the distance between the terminal and the human body without adding additional terminal manufacturing costs.
  • the antenna structure of the terminal is generally adjusted, the absorbing material is added or other directors/reflectors are additionally added to reduce the electromagnetic radiation of the terminal, but this method increases the terminal's electromagnetic radiation.
  • the cost, and also the wiring of the antenna requires a redesign of the circuit layout of the terminal.
  • the SAR value is used to indicate the degree of radiation of the human body and the terminal at the current distance. In general, the amount of electromagnetic radiation when the SAR value is less than or equal to 1 is not much damage to the human body.
  • the SAR value of the terminal is more than 1 when the terminal is measured in the unit of mm, and the distance of the SAR value exceeding 1 and the corresponding SAR value are recorded, and then the antenna transmit power of the terminal is lowered until At this distance, the SAR value is less than 1, and the adjusted power value is recorded.
  • the distance and the corresponding power adjustment value are stored in the terminal in the form of a correspondence table, so that the terminal can adjust the output power of the antenna according to the content recorded in the correspondence table.
  • the power adjustment value is 4.5 dB;
  • the power adjustment value is 4dB;
  • the distance between the human body and the terminal is 2mm, the power adjustment value is 3.5dB;
  • the power adjustment value is 0.5 dB.
  • the distance between the human body and the terminal is greater than 8 mm, it is not necessary to adjust the transmission power of the terminal antenna.
  • the step value of the terminal adjusting power is 0.5 dB, which is D
  • the emission state of the antenna is not stable enough and the adjustment effect is not obvious.
  • the result of the test is recorded in a correspondence table, where the correspondence table includes: a distance between the human body and the terminal and a corresponding power adjustment value.
  • the terminal can adjust the output power of the antenna according to the content recorded in the corresponding relationship table, and the output power of the antenna of the terminal can be easily adjusted without changing the design of the terminal antenna, and no unnecessary antenna clearance or routing area is required. Therefore, it does not have any influence on the circuit layout of the terminal, and has the characteristics of simple principle and clear operation.
  • the terminal may also reduce the transmission power of the terminal antenna according to a preset setting when detecting that the user is in a call or Internet service, but this method can only lower the antenna of the terminal at one time.
  • the radiation intensity usually reduces the signal strength of the terminal too much, which affects the user's normal use of the terminal or the use of the Internet service.
  • the step of obtaining the power adjustment value corresponding to the distance includes:
  • the judgment result indicates that the acquired distance is smaller than the maximum value of the distance recorded in the correspondence table, the obtained distance is rounded, otherwise the process returns to step 100 to obtain the distance between the human body and the terminal;
  • the output power of the antenna is adjusted; and the signal emission intensity of the terminal can be adjusted in real time according to the distance of the human body from the terminal. It not only protects the human body from the electromagnetic radiation of the terminal, but also ensures the normal use of the user or the use of the Internet service.
  • the method of adjusting the transmission power of the terminal is further described by the following embodiments.
  • FIG. 2 is a flowchart of a method for adjusting transmit power of a terminal. As shown in FIG. 2, the method includes the following steps: ⁇
  • Step 200 Obtain a distance from a human body part of the user using the mobile terminal to the terminal.
  • Step 201 According to the obtained distance, according to the correspondence between the terminal and the human body tissue distance and the adjusted power obtained by the previous test, find the corresponding adjustment power. And feeding back the adjusted power to the terminal in the form of an instruction;
  • Step 202 When receiving the corresponding instruction for adjusting the power, make corresponding adjustments to the transmit power.
  • the SAR reduction function there must be a sensor on the terminal that senses the human body from the mobile terminal (ie, the SAR antenna). At this time, we can directly use the sensor to monitor the distance from the human body to the mobile terminal. If there is no SAR reduction function, you need to add a sensor on the terminal to play the corresponding role.
  • the distance and the adjusted power can be organized into a list relationship and input to the mobile terminal for backup.
  • the distance from the human body to the terminal is measured according to the sensor of the terminal, and the corresponding adjustment power is found in the list, and the corresponding output power is obtained according to the adjusted power.
  • the SAR value is measured in mm as the basic unit. This is determined by the laboratory test environment and the actual practical effect. If the step is too large, that is, the preset step upper limit threshold is exceeded, the actual effect will be very large. The discount, if the step is too small, exceeds the preset lower limit threshold, on the one hand, the laboratory conditions cannot be accurately tested, and on the other hand, the mobile phone's transmit power control is also not accurate to this extent.
  • the mobile terminal needs to consider the specific requirements of different customers when formulating the transmission power according to the measured SAR value and distance relationship. For example, when the European CE standard and the US FCC standard are different, ⁇ according to the data obtained, the transmission power is determined. It also needs to be considered according to the actual situation.
  • the mobile terminal obtains the distance as: the closest distance from the strongest point on the terminal to the human body.
  • the step value of the final adjusted power of the terminal is 0.5 dB, which is because the state is not stable enough and the error is significantly increased when the step is less than 0.5 dB. .
  • the terminal determines the distance between the strongest radiation point on the terminal and the closest part of the human body part to command the terminal to output the corresponding adjustment power to meet the SAR test requirements and is harmless to the human body and try not to sacrifice the antenna radiation.
  • the purpose of performance which is equivalent to the optimization between the over-the-air technology OTA (Over-the-Air Technology) and SAR certification, avoids the traditional one-sided improvement of OTA and leads to SAR over-standard and one-sided SAR certification test and ignores Extreme practice of attenuation of antenna radiation performance.
  • OTA Over-the-Air Technology
  • the method provided in this embodiment does not need to add additional hardware in hardware design compared with the terminal that currently increases the SAR function; only need to make appropriate adjustments in the sensor, so that no additional cost pressure is generated; In the antenna design, no extra antenna headroom or routing area is required, so there is no impact on the terminal layout.
  • the control of this embodiment is open loop control, and the principle is simple and the operation is clear.
  • the method for adjusting the transmit power of the terminal obtains the power adjustment value corresponding to the distance between the current human body and the terminal by acquiring the distance between the current human body and the terminal, and according to the queried power adjustment value. , reducing the transmission power of the antenna; adjusting the antenna power output by the terminal in real time according to the distance between the human body and the terminal, so that the adjusted terminal antenna transmission power has the SAR value in accordance with the regulation, and the user is protected from the antenna radiation, and It will affect the user's use of the terminal; Moreover, the antenna design of the terminal does not require redundant antenna clearance or routing area, so it does not have any influence on the circuit layout of the terminal, and has the characteristics of simple principle and clear operation.
  • a schematic diagram of an embodiment of a device for adjusting a transmit power of a terminal in the embodiment of the present invention as shown in FIG. 3, the device includes:
  • Get the ear 4 block 10 configured to obtain the distance between the current human body and the terminal
  • the query module 20 is configured to obtain, according to the distance, a power adjustment value corresponding to the distance in a correspondence table between a pre-stored distance and a transmit power adjustment value, where the distance is a distance between the human body and the terminal ;
  • the adjusting module 30 is configured to adjust the transmit power of the terminal according to the power adjustment value.
  • the acquiring module 10 is configured to acquire a distance between the human body and the terminal by using a sensor provided by the terminal. - y
  • the correspondence table includes: a distance between the human body and the terminal and a corresponding power adjustment value.
  • the querying module 20 is configured to determine whether the acquired distance is smaller than the maximum value of the distance recorded in the correspondence table, and obtain a judgment result; when the judgment result indicates that the acquired distance is smaller than the record in the correspondence table When the maximum value of the distance is large, the obtained distance is rounded, otherwise the distance between the human body and the terminal is obtained. In the correspondence table, the power adjustment value corresponding to the distance is queried.
  • the distance between the human body and the terminal is the distance between the strongest point of radiation of the human body closest to the terminal.
  • the obtaining module 10 can be implemented by using a sensor, and the query module 20 and the adjusting module 30 can be implemented by using a central processing unit (CPU) in the terminal.
  • CPU central processing unit
  • the working process of the device is as shown in FIG. 4.
  • the distance from the user to the terminal is determined first, when the distance is greater than the maximum distance that the terminal needs to reduce the power (for example, the distance is 8 mm, that is, When the terminal is working outside the human body 8mm away, the SAR maximum value is also within the allowable range. It is equivalent to the terminal not detecting the human body nearby, so the terminal will not perform any operation and continue the determination operation.
  • the distance value When the terminal detects that the distance from the user's body to the mobile terminal is less than the maximum value of the distance recorded on the table, the distance value must be between 0 mm and 8 mm (8 mm as above, for example only), and we round the value.
  • the distance between the terminal and the user's body is measured to be 2.2 mm.
  • the rounding is 2 mm.
  • the transmission power needs to be reduced by 4dB when the test distance is 1mm, and the transmission power needs to be reduced by 3.5dB when the test distance is 2mm, and the test distance is 3mm.
  • the transmit power needs to be reduced by 3 dB and so on.
  • the power adjustment value that should be selected at this time can be selected according to the actual distance from the human body to the terminal in real time. For example, when the human body part is 3 mm from the terminal, the power adjustment value that needs to be reduced according to the laboratory test result is 3 dB, and the terminal reduces the transmission power of the antenna according to the command. 1 Q
  • the embodiment of the present invention further provides a terminal, which includes the apparatus for adjusting the transmit power of the terminal in the foregoing embodiment.
  • the apparatus and the terminal for adjusting the transmit power of the terminal provided by the embodiment of the present invention, by acquiring the distance between the current human body and the terminal, query the power adjustment value corresponding to the distance between the current human body and the terminal, according to the queried power. Adjust the value to reduce the transmit power of the antenna; adjust the antenna power output by the terminal in real time according to the distance between the human body and the terminal, so that the adjusted transmit power of the terminal antenna has both the SAR value and the user's radiation protection. It does not affect the user's use of the terminal; and the antenna design of the terminal does not require redundant antenna clearance or routing area, so it does not have any influence on the circuit layout of the terminal, and has the advantages of simple principle and clear operation. .
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Abstract

本发明提供一种终端发射功率的调整方法、装置和终端，所述方法包括：获取当前人体与终端的距离；根据所述距离，在预先存储的距离与发射功率调整值的对应关系表中，获得所述距离对应的功率调整值；其中，所述距离是人体与终端之间的距离；按照所述功率调整值调整所述终端的发射功率。本发明提供的终端发射功率的调整方法，根据当前人体与终端的距离，实时调整终端输出的天线功率，使调整后的终端天线发射功率既具有符合规定的SAR值、使用户免于天线辐射的侵害，又不会影响用户对终端的使用。

Description

一种终端发射功率的调整方法、 装置和终端
技术领域
本发明涉及无线通信领域， 特别涉及一种终端发射功率的调整方法、 装置 和终端。 背景技术
随着移动终端在生活中起着越来越重要的作用， 移动终端已经成为目前人 们生活工作中不可缺少的工具， 而移动终端在日常使用中的安全性被人们愈加 重视。 在使用移动终端的过程中， 尤其是人们在移动终端进行会话的过程中， 人们会受到移动终端天线发出的电磁辐射的侵害，而现在越来越多的研究表明， 过量的电磁辐射会引起人们罹患各种疾病， 甚至危及人的生命安全， 所以各个 国家都对移动终端天线的电磁辐射提出了越来越严格的标准， 以减少移动终端 天线发出的电磁辐射对人体的侵害， 其中， 比吸收率（SAR )值是衡量电磁辐 射的重要指标， 各个国家都根据 SAR值制定了移动终端天线的电磁辐射标准， 只允许符合标准的移动终端销售。
现有的终端制造厂商， 为了降低移动终端天线对人体的电磁辐射， 以符合 各国移动终端天线电磁辐射的标准， 通过在移动终端增加吸波材料或额外加入 其它引向器 /反射器或对天线结构进行适当调整来降低移动终端天线的 SAR值。 但是， 采用上述方法对移动终端天线发出的电磁辐射的降幅有限， 不能有效降 低移动终端天线的 SAR值； 或者由于太过注重降低天线的 SAR值， 在用户使 用移动终端进行通话或上网业务的过程中 ,对天线的发射功率的降低幅度太大， 影响了用户对移动终端的正常使用。
所以现在急需一种能够根据应用的实际情况有效降低移动终端天线辐射的 方法。 发明内容
为克服上述缺陷， 本发明实施例提供一种终端发射功率的调整方法、 装置 和终端。
第一方面， 本发明实施例提供一种终端发射功率的调整方法， 包括： 获取当前人体与终端的距离；
根据所述距离， 在预先存储的距离与发射功率调整值的对应关系表中， 获 得所述距离对应的功率调整值； 其中， 所述距离是人体与终端之间的距离； 按照所述功率调整值调整所述终端的发射功率。
优选地， 所述获取当前人体与终端的距离包括： 通过所述终端设置的传感 器， 获取人体与所述终端之间的距离。
优选地， 所述对应关系表， 包括： 人体与所述终端的距离和对应的功率调 整值。
优选地， 根据所述距离， 在预先存储的距离与发射功率调整值的对应关系 表中， 获得所述距离对应的功率调整值， 包括：
判断获取的距离是否小于所述对应关系表中记录的距离的最大值， 获取一 判断结果；
当判断结果指示获取的距离小于所述对应关系表中记录的距离的最大值 时， 则对获取的距离进行取整操作， 否则返回人体与终端距离的获取；
在所述对应关系表中， 查询与所述距离对应的功率调整值。
优选地， 所述人体与终端的距离为人体最接近所述终端的辐射最强点之间 的距离。
第二方面， 本发明实施例提供一种终端发射功率的调整装置， 包括： 获耳 4莫块， 配置为获取当前人体与终端的距离；
查询模块， 配置为根据所述距离， 在预先存储的距离与发射功率调整值的 对应关系表中， 获得所述距离对应的功率调整值； 其中， 所述距离是人体与终 端之间的距离；
调整模块， 配置为按照所述功率调整值调整所述终端的发射功率。
优选地， 所述获取模块， 配置为通过所述终端设置的传感器， 获取人体与 所述终端之间的距离。 优选地， 所述对应关系表包括： 人体与所述终端的距离和对应的功率调整 值。
优选地， 所述查询模块， 配置为判断获取的距离是否小于所述对应关系表 中记录的距离的最大值， 获取一判断结果； 当判断结果指示获取的距离小于所 述对应关系表中记录的距离的最大值时， 则对获取的距离进行取整操作， 否则 返回人体与终端距离的获取； 在所述对应关系表中， 查询与所述距离对应的功 率调整值。
优选地， 所述人体与终端的距离为人体最接近所述终端的辐射最强点之间 的距离。
第三方面， 本发明实施例提供一种终端， 包括所述终端发射功率的调整装 置。
本发明实施例提供的终端发射功率的调整方法、 装置和终端， 通过获取当 前人体与终端的距离， 查询与当前人体与终端的距离对应的功率调整值， 根据 查询到的所述功率调整值， 降低天线的发射功率； 根据当前人体与终端的距离， 实时调整终端输出的天线功率， 使调整后的终端天线发射功率既具有符合规定 的 SAR值、 使用户免于天线辐射的侵害， 又不会影响用户对终端的使用； 而且 在终端的天线设计上， 也不要求多余的天线净空或走线区域， 因此对于终端的 电路布局不会产生任何影响， 具有原理简单和操作清晰的特点。 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表示终端发射功率的调整方法实施例的流程图；
图 2表示终端发射功率的调整方法另一实施例的流程图；
图 3表示终端发射功率的调整装置的实施例示意图； 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。
本发明实施例终端发射功率的调整方法， 如图 1所示， 包括如下步驟： 步驟 100: 获取当前人体与终端的距离；
步驟 101 : 根据所述距离， 在预先存储的距离与发射功率调整值的对应关 系表中， 获得所述距离对应的功率调整值； 其中， 所述距离是人体与终端之间 的距离；
步驟 102: 按照所述功率调整值调整所述终端的发射功率。
通过上述操作， 实时调整终端输出的天线功率， 使调整后的终端天线发射 功率既具有符合规定的 SAR值、使用户免于天线辐射的侵害， 又不会影响用户 对终端的使用。
具体地， 所述人体与终端的距离为： 人体最接近所述终端的辐射最强点之 间的距离。
本实施例中所述的方法可以应用在各种终端中， 所述终端包括但不限于： 具有天线且能发出电磁辐射信号的各种设备， 如： 手机、 平板电脑、 便携式电 脑等移动终端， 以及微波炉、 电磁炉、 收音机等智能家电。 简要说明如下： 本实施例所述的方法应用在移动终端时， 移动终端通过设置的传感器获取 和人体的距离， 然后找到获取的距离对应的功率调整值， 移动终端根据得到的 功率调整值调整天线发射的功率， 然后按照调整后的发射功率发射天线信号； 通过这种方式， 可以避免移动终端的用户免于天线辐射的侵害。
本实施例所述的方法应用在智能家电时， 以^!波炉为例进行说明。 当用户 n
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使用微波炉加热食物时， 微波炉会通过设置的传感器获取与用户的距离， 然后 找到获取的距离对应的功率调整值， 微波炉根据得到的功率调整值调整磁控管 发射的电磁波的功率， 然后按照调整后的功率发射加热食物的电磁波， 通过这 种方式， 可以减少微波炉发射的电磁波对用户的侵害， 保护人体的安全。
所以， 在本实施例中， 通过终端设置的传感器获取终端和人体的距离， 可 以准确的获取终端与人体的距离， 保证功率调整的准确性。
优选地， 所述传感器可以采用终端中已有的距离传感器测量终端和人体的 距离， 距离传感器的测量精度已达毫米（mm )以上级别， 所以完全可以保证距 离测量的准确性， 而且， 采用终端的已有设备测量终端和人体的距离， 不会增 加额外的终端制造成本。
在现有降低终端电磁辐射的方法中， 一般会对终端的天线结构进行调整， 增加吸波材料或额外加入其它引向器 /反射器来降低终端的电磁辐射，但是这种 方法会增加终端的成本， 而且还会改变天线的布线， 需要重新设计终端的电路 布局。现在利用 SAR值表示人体与终端在当前距离的辐射程度， 一般情况下认 为 SAR值小于等于 1时的电磁辐射量是对人身造成不了多少伤害的。所以在本 实施例中， 以 mm为单位测量终端离人体多近的情况下 SAR值会超过 1 , 并记 录下 SAR值超过 1的距离和对应的 SAR值， 然后降低终端的天线发射功率， 直到在该距离下 SAR值小于 1 , 记录调整的功率值。
最后， 将距离与对应的功率调整值以对应关系表的形式存储在终端中， 以 使终端可以根据对应关系表记录的内容调整天线的输出功率。
在实际测量过程中发现， 人体与终端的距离越近， SAR值越大， 相应的需 要调整的功率值就越大： 人体和终端的距离为 0mm时， 功率调整值是 4.5dB; 当人体和终端的距离为 1mm时， 功率调整值是 4dB; 当人体和终端的距离为 2mm时， 功率调整值是 3.5dB; 以此类推， 当人体和终端的距离为 8mm时， 功 率调整值是 0.5 dB; 当人体和终端的距离大于 8mm时， 就不用调整终端天线的 发射功率了。
通过上面的描述可以看出， 所述终端调整功率的步进值为 0.5dB, 这是由 D
于步进小于 0.5dB时天线的发射状态不够稳定而且调整的效果不明显。
将测试的结果记录在对应关系表中， 所述对应关系表中包括： 人体与所述 终端的距离和对应的功率调整值。
通过终端根据对应关系表记录的内容调整天线的输出功率， 可以在不改变 终端天线设计的前提下， 就可以轻易的调整终端的天线的输出功率， 也不要求 多余的天线净空或走线区域， 因此对于终端的电路布局不会产生任何影响， 具 有原理简单和操作清晰的特点。
在现有降低终端电磁辐射的方法中， 终端还可以在检测到用户在进行通话 或上网业务时， 根据预先的设定降低终端天线的发射功率， 但是这种方式仅能 一次性降低终端的天线辐射强度， 通常会过多的降低终端的信号强度， 影响用 户对终端正常的通话或上网业务的使用。
因此在本实施例中， 根据所述距离， 在预先存储的距离与发射功率调整值 的对应关系表中， 获得所述距离对应的功率调整值的步驟包括：
判断获取的距离是否小于所述对应关系表中记录的距离的最大值， 获取判 断结果；
当判断结果指示获取的距离小于所述对应关系表中记录的距离的最大值 时， 对获取的距离进行取整操作， 否则返回步驟 100进行人体与终端距离的获 取；
在所述对应关系表中， 查询与所述距离对应的功率调整值。
通过上述操作， 在终端所获取的人体与终端的距离在对应关系表上记录的 距离范围中时， 才会调整天线的输出功率； 而且可以根据人体距离终端的远近， 实时调整终端的信号发射强度，既保证了人体不受终端电磁辐射的侵害的同时， 又保证了用户正常通话或者上网业务的使用。 通过以下实施例对终端发射功率的调整方法作进一步描述。
如图 2为所述终端发射功率的调整方法的流程图， 如图 2所示， 所述方法 包括如下步驟： η
步驟 200: 获取使用该移动终端的用户的人体部位到终端的距离； 步驟 201 : 根据获取得到的距离， 再根据之前测试得到的终端和人体组织 距离和调整功率的对应关系， 找到对应的调整功率， 并将该调整功率以指令的 形式反馈给终端；
步驟 202: 在收到相应的调整功率的指令时， 对发射功率做出相应的调整。 在现有终端上， 如已有降 SAR功能， 则必然终端上存在感应人体距离移动 终端的传感器（即降 SAR天线）， 此时我们可以直接使用该传感器进行对人体 部位到移动终端距离的监测； 如无降 SAR功能， 则首先需要在终端上增加传感 器才能起到相应作用。
终端到人体的距离和发射功率的对应关系， 必须在实验室得到。这是因为， SAR值测试本身是一个精度要求非常高的测试， 同一部机器在不同实验室测试 时， 都会允许有 30%的测试误差， 因此， 采用实验室测试结果最能接近真实状 态。根据 SAR的要求，距离和调整功率可以整理成一个列表的关系并被输入移 动终端备用。
用户实际使用时， 根据终端的传感器测得人体到终端的距离， 在列表中找 到对应的调整功率， 根据调整功率得到对应的输出功率。
测试 SAR值时以 mm为基本单位，这是由实验室测试环境及实际实用效果 共同决定的， 如果步进太大即超过预设的步进上限阈值， 则最终达到的实际效 果会有很大折扣， 如果步进太小即超过预设的步进下限阈值， 一方面由于实验 室条件无法精确测试， 另一方面手机发射功率控制也同样无法精确到该程度。
移动终端根据所测得的 SAR值和距离关系制定发射功率时需考虑不同客 户的具体要求， 例如欧洲的 CE标准和美国的 FCC标准有艮大差异， ^^据所获 数据制定发射功率时， 也需根据实际情况进行考虑。
所述移动终端获得所述距离为： 所述终端上辐射最强点到所述人体的最近 距离。
所述终端调整后的最终调整功率的步进值为 0.5dB , 这是由于步进小于 0.5dB时状态不够稳定及误差明显增大。 。
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本实施例主要通过终端判断终端上的辐射最强点与人体部位中最靠近移动 终端的距离来命令终端输出相应的调整功率来达到既满足 SAR测试要求及对 人体无害又尽量不牺牲天线辐射性能的目的， 这样相当于在空中下载技术 OTA ( Over - the - Air Technology )和 SAR认证之间达到了最优化， 避免了传统方 面片面提高 OTA而导致 SAR超标和片面强调 SAR认证测试而忽略了天线辐射 性能衰减的极端做法。
本实施例提供的方法，在硬件设计上，与当前增加降 SAR功能的终端相比， 并不需要增加额外的硬件； 仅需在传感器中进行适当调整， 因此基本不会产生 额外的成本压力； 在天线设计上， 也不要求多余的天线净空或走线区域， 因此 对于终端布局不会产生影响。 本实施例控制为开环控制， 原理简单， 操作清晰。
基于上述描述， 本发明实施例中提供的终端发射功率的调整方法， 通过获 取当前人体与终端的距离， 查询与当前人体与终端的距离对应的功率调整值， 根据查询到的所述功率调整值， 降低天线的发射功率； 根据当前人体与终端的 距离， 实时调整终端输出的天线功率， 使调整后的终端天线发射功率既具有符 合规定的 SAR值、使用户免于天线辐射的侵害，又不会影响用户对终端的使用； 而且在终端的天线设计上， 也不要求多余的天线净空或走线区域， 因此对于终 端的电路布局不会产生任何影响， 具有原理简单和操作清晰的特点。 本发明实施例中终端发射功率的调整装置的实施例示意图， 如图 3所示， 所述装置包括：
获耳 4莫块 10, 配置为获取当前人体与终端的距离；
查询模块 20, 配置为根据所述距离， 在预先存储的距离与发射功率调整值 的对应关系表中， 获得所述距离对应的功率调整值； 其中， 所述距离是人体与 终端之间的距离；
调整模块 30, 配置为按照所述功率调整值调整所述终端的发射功率。
优选地， 所述获取模块 10, 配置为通过所述终端设置的传感器， 获取人体 与所述终端之间的距离。 - y
优选地， 所述对应关系表中包括： 人体与所述终端的距离和对应的功率调 整值。
优选地， 所述查询模块 20, 配置为判断获取的距离是否小于所述对应关系 表中记录的距离的最大值， 获取一判断结果； 当判断结果指示获取的距离小于 所述对应关系表中记录的距离的最大值时， 则对获取的距离进行取整操作， 否 则返回人体与终端距离的获取； 在所述对应关系表中， 查询与所述距离对应的 功率调整值。
优选地， 所述人体与终端的距离为人体最接近所述终端的辐射最强点之间 的距离。
优选地， 上述获取模块 10可以使用传感器实现， 所述查询模块 20及调整 模块 30均可以使用终端中的中央处理器（CPU ) 实现。
装置的工作流程如图 4所示， 当终端进行通话或上网业务时， 先对用户身 体到终端的距离进行判定， 当该距离大于终端需要降功率的最大距离时（例如 该距离为 8mm, 即终端在距离人体 8mm外工作时 SAR最大值也在许可范围之 内）， 相当于终端检测不到附近有人体， 因此终端不会进行任何操作， 仍继续进 行判定操作。
当终端检测到用户身体到移动终端的距离小于表格上记录的距离的最大值 时， 此时该距离值必在 0mm至 8mm ( 8mm同上， 仅作为举例）之间， 我们对 数值进行取整， 例如， 测得终端与用户身体的距离为 2.2mm, 为了保证功率调 整的有效性， 取整为 2mm。 另一方面，根据实验室测试 SAR时也得到的与 8种距离对应的功率调整值， 测试距离为 1mm时发射功率需要降低 4dB, 测试距离为 2mm时发射功率需要 降低 3.5dB, 测试距离为 3mm时发射功率需要降低 3dB并以此类推。
通过以上方式， 可以实时的根据实际人体到终端的距离来选取此时应该选 择的功率调整值。例如当人体部位距离终端为 3mm时，根据实验室测试结果发 射功率需要降低的功率调整值是 3dB, 此时终端根据命令将天线的发射功率降 1 Q
低 3dB后发射， 则人体所在位置的 SAR值必然是满足标准的。
此时传感器继续对人体部位到移动终端的距离进行测试判断， 周而复始上 述过程。 本发明实施例还提供一种终端， 包括上述实施例中所述的终端发射功率的 调整装置。
本实施例中提供的终端的功能和处理流程， 可以参见上面提供的终端发射 功率的调整装置的实施例的流程， 此处不再赘述。
基于上述描述， 本发明实施例中提供的终端发射功率的调整装置和终端， 通过获取当前人体与终端的距离， 查询与当前人体与终端的距离对应的功率调 整值， 根据查询到的所述功率调整值， 降低天线的发射功率； 根据当前人体与 终端的距离， 实时调整终端输出的天线功率， 使调整后的终端天线发射功率既 具有符合规定的 SAR值、使用户免于天线辐射的侵害， 又不会影响用户对终端 的使用； 而且在终端的天线设计上， 也不要求多余的天线净空或走线区域， 因 此对于终端的电路布局不会产生任何影响， 具有原理简单和操作清晰的特点。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分步驟可 以通过程序指令相关的硬件来完成。 前述的程序可以存储于一计算机可读取存 储介质中。 该程序在执行时， 执行包括上述各方法实施例的步驟； 而前述的存 储介质包括： ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
最后应说明的是： 以上各实施例仅用以说明本发明的技术方案， 而非对其 限制； 尽管参照前述各实施例对本发明进行了详细的说明， 本领域的普通技术 人员应当理解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或者 对其中部分或者全部技术特征进行等同替换； 而这些修改或者替换， 并不使相 应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权利要求书
1、 一种终端发射功率的调整方法， 包括：
获取当前人体与终端的距离；
根据所述距离， 在预先存储的距离与发射功率调整值的对应关系表中， 获 得所述距离对应的功率调整值； 其中， 所述距离是人体与终端之间的距离； 按照所述功率调整值调整所述终端的发射功率。
2、 根据权利要求 1所述的方法， 其中， 所述获取当前人体与终端的距离， 包括：
通过所述终端设置的传感器， 获取人体与所述终端之间的距离。
3、 根据权利要求 2所述的方法， 其中， 所述对应关系表， 包括： 人体与所 述终端的距离和对应的功率调整值。
4、 根据权利要求 1所述的方法， 其中， 根据所述距离， 在预先存储的距离 与发射功率调整值的对应关系表中， 获得所述距离对应的功率调整值， 包括： 判断获取的距离是否小于所述对应关系表中记录的距离的最大值， 获取一 判断结果；
当判断结果指示获取的距离小于所述对应关系表中记录的距离的最大值 时， 则对获取的距离进行取整操作， 否则返回人体与终端距离的获取；
在所述对应关系表中， 查询与所述距离对应的功率调整值。
5、 根据权利要求 1-4任一项所述的方法， 其中， 所述人体与终端的距离为 人体最接近所述终端的辐射最强点之间的距离。
6、 一种终端发射功率的调整装置， 包括：
获耳 4莫块， 配置为获取当前人体与终端的距离；
查询模块， 配置为根据所述距离， 在预先存储的距离与发射功率调整值的 对应关系表中， 获得所述距离对应的功率调整值； 其中， 所述距离是人体与终 端之间的距离；
调整模块， 配置为按照所述功率调整值调整所述终端的发射功率。
7、 根据权利要求 6所述的装置， 其中， 所述获取模块， 配置为通过所述终 端设置的传感器， 获取人体与所述终端之间的距离。
8、 根据权利要求 7所述的装置， 其中， 所述对应关系表包括： 人体与所述 终端的距离和对应的功率调整值。
9、 根据权利要求 6所述的装置， 其中， 所述查询模块， 配置为判断获取的 距离是否小于所述对应关系表中记录的距离的最大值， 获取一判断结果； 当判 断结果指示获取的距离小于所述对应关系表中记录的距离的最大值时， 则对获 取的距离进行取整操作， 否则返回人体与终端距离的获取； 在所述对应关系表 中， 查询与所述距离对应的功率调整值。
10、 根据权利要求 6-9任一项所述的装置， 其中， 所述人体与终端的距离 为人体最接近所述终端的辐射最强点之间的距离。
11、一种终端，其中， 包括权利要求 6-10所述的终端发射功率的调整装置。
PCT/CN2014/072273 2013-10-15 2014-02-19 一种终端发射功率的调整方法、装置和终端 WO2014154068A1 (zh)

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