WO2016061972A1 - 一种选择发射终端的方法及主终端 - Google Patents

一种选择发射终端的方法及主终端 Download PDF

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Publication number
WO2016061972A1
WO2016061972A1 PCT/CN2015/073726 CN2015073726W WO2016061972A1 WO 2016061972 A1 WO2016061972 A1 WO 2016061972A1 CN 2015073726 W CN2015073726 W CN 2015073726W WO 2016061972 A1 WO2016061972 A1 WO 2016061972A1
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terminal
transmitting
secondary terminals
transmitting terminal
selecting
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PCT/CN2015/073726
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English (en)
French (fr)
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杨征
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中兴通讯股份有限公司
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Publication of WO2016061972A1 publication Critical patent/WO2016061972A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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

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  • the present invention relates to the technical field of selecting a transmitting terminal, and in particular, to a method for selecting a transmitting terminal and a main terminal.
  • the terminal may increase its own transmission power, which may reach the maximum transmission power (for example, the maximum transmission power of the GSM900 may reach 33 dBm).
  • the maximum transmission power for example, the maximum transmission power of the GSM900 may reach 33 dBm.
  • a method of selecting a transmitting terminal comprising:
  • the primary terminal transmits the baseband signal to the at least two secondary terminals through the wireless device;
  • the primary terminal receives feedback information returned by at least two of the secondary terminals;
  • the primary terminal selects an optimal secondary terminal as the transmitting terminal according to the received feedback information.
  • the method before the step of the base terminal transmitting the baseband signal to the at least two secondary terminals by using the wireless device, the method further includes:
  • the master terminal encodes the control command and sends the encoded control command to the wireless device Set
  • the wireless device encapsulates the encoded control command code into a first AT command, and sends the first AT command to at least two of the secondary terminals;
  • At least two of the secondary terminals convert the received first AT command into a standard AT command and execute the standard AT command to implement wireless connection with the master terminal by the wireless device.
  • the method further includes:
  • the main terminal turns off its own radio frequency transmitting circuit power supply to ensure that no uplink signal is transmitted.
  • the step of selecting, by the primary terminal, the optimal secondary terminal as the transmitting terminal according to the received feedback information includes:
  • the primary terminal receives the transmit power returned by at least two of the secondary terminals;
  • the primary terminal sorts transmit powers of at least two of the secondary terminals
  • the primary terminal selects a secondary terminal with the smallest transmission power as the transmitting terminal.
  • the method further includes:
  • Each of the secondary terminals separately modulates and amplifies the received baseband signal to obtain a radio frequency signal, and transmits the radio frequency signal to a corresponding base station;
  • the step of selecting, by the primary terminal, the optimal secondary terminal as the transmitting terminal according to the received feedback information includes:
  • the primary terminal calculates a signal power loss value of at least two of the secondary terminals according to its own transmit signal power and received received signal power;
  • the primary terminal sorts signal power loss values of at least two of the secondary terminals
  • the primary terminal selects a secondary terminal having the largest signal power loss value as the transmitting terminal.
  • the method further includes:
  • the primary terminal periodically monitors uplink transmit power of the transmitting terminal, and determines the uplink transmission. Whether the power meets the preset requirements;
  • the primary terminal reselects the new transmit terminal.
  • the method further includes:
  • the primary terminal disconnects wireless connections with all secondary terminals except the transmitting terminal.
  • a master terminal the master terminal includes: a sending module, a receiving module, and a selecting module, where
  • the sending module is configured to: send a baseband signal to at least two secondary terminals by using a wireless device;
  • the receiving module is configured to: receive feedback information returned by at least two of the secondary terminals;
  • the selection module is configured to: select an optimal secondary terminal as the transmitting terminal according to the received feedback information.
  • the main terminal further includes a processing module
  • the processing module is configured to: turn off its own radio frequency transmitting circuit power supply.
  • the selecting module is configured to select an optimal secondary terminal as the transmitting terminal according to the received feedback information as follows:
  • a secondary terminal having the smallest transmission power is selected as the transmitting terminal.
  • the selecting module is configured to select an optimal secondary terminal as the transmitting terminal according to the received feedback information as follows:
  • the secondary terminal having the largest signal power loss value is selected as the transmitting terminal.
  • the processing module is further configured to: periodically monitor an uplink transmit power of the transmitting terminal, and determine whether the uplink transmit power meets a preset requirement;
  • the selection module is further configured to: when the uplink transmit power does not meet the preset requirement, Select a new transmitting terminal.
  • the processing module is further configured to: disconnect the wireless connection between the primary terminal and all secondary terminals except the transmitting terminal.
  • the processing module is further configured to: disconnect the wireless connection between the primary terminal and all secondary terminals except the transmitting terminal.
  • a computer program comprising program instructions which, when executed by a computer, cause the computer to perform any of the above methods of selecting a transmitting terminal.
  • a carrier carrying the computer program A carrier carrying the computer program.
  • the problem of high radiation intensity damage caused by the terminal to the human head is solved, and the electromagnetic radiation emitted by the radio wave to the human head during the conversation is reduced by the selection and use of the optimal secondary terminal.
  • FIG. 1 is a schematic flowchart of selecting a transmitting terminal according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a specific selection of a transmitting terminal according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an apparatus of a master terminal according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a method for selecting a transmitting terminal according to an embodiment of the present invention, where the method includes:
  • step 101 the master terminal transmits a baseband signal to each of the secondary terminals through the wireless device.
  • the master terminal encodes the control command and sends the encoded control command to the wireless device;
  • the wireless device encapsulates the encoded control command code into a first AT command, and sends the first AT command to each of the secondary terminals;
  • Each of the secondary terminals converts the received first AT command into a standard AT command, and executes the standard AT command to implement wireless connection with the master terminal by the wireless device.
  • this step also includes:
  • the main terminal turns off its own radio frequency transmitting circuit power supply to ensure that no uplink signal is transmitted.
  • Step 102 The primary terminal receives feedback information returned by each secondary terminal.
  • Step 103 The primary terminal selects an optimal secondary terminal as the transmitting terminal according to the feedback information.
  • the primary terminal selects an optimal secondary terminal as the transmitting terminal according to the feedback information, specifically:
  • the primary terminal sorts the transmit power of each secondary terminal
  • the primary terminal selects the secondary terminal with the smallest transmit power as the transmitting terminal.
  • the method further includes:
  • Each of the secondary terminals separately modulates and amplifies the received baseband signal to obtain a radio frequency signal, and transmits the radio frequency signal to a corresponding base station;
  • the base station performs signal to noise ratio calculation on the radio frequency signal, obtains transmit power of each sub-terminal, and sends the obtained transmit power to each sub-terminal.
  • the primary terminal selects an optimal secondary terminal as the transmitting terminal according to the feedback information, specifically:
  • the master terminal calculates a signal power loss value according to its own transmit signal power and the received received signal power;
  • the primary terminal sorts signal power loss values of the secondary terminals
  • the primary terminal selects the secondary terminal with the largest signal power loss value as the transmitting terminal.
  • the method further includes:
  • the master terminal periodically monitors uplink transmit power of the transmitting terminal, and determines whether the uplink transmit power meets a preset requirement
  • the primary terminal reselects the new transmit terminal.
  • the master terminal disconnects the wireless connection with each of the secondary terminals except the transmitting terminal.
  • the wireless device may be a Bluetooth device or a WIFI
  • the plurality of terminal devices may be a smart watch, a smart wristband, etc., as illustrated in FIG. 2, and the Bluetooth device is used as a wireless device.
  • step 201 the master terminal performs wireless connection with each secondary terminal through the Bluetooth device.
  • the main intelligent terminal processor encodes and sends the built-in control command to the Bluetooth chip, and the Bluetooth chip encodes the command string according to the Bluetooth AT (Attention) instruction set, and sends the Bluetooth signal to each of the sub-intelligent terminals via the Bluetooth antenna.
  • the communication device, the Bluetooth communication device of each sub-intelligent terminal converts the Bluetooth AT command transmitted by the main intelligent terminal into a communication standard AT command, and sends it to the respective processor, and each sub-intelligent terminal processor executes an AT command to respectively activate each sub-intelligent The RF circuit of the terminal.
  • the primary intelligent terminal controller controls to turn off the power of the radio frequency transmitting circuit of the main intelligent terminal, that is, the radio frequency transmitting circuit and the transmitting antenna of the primary intelligent terminal stop working, and the primary intelligent terminal does not The uplink signal is transmitted.
  • Step 202 The primary terminal sends a baseband signal to each secondary terminal through the Bluetooth device.
  • the primary intelligent terminal controller transmits its own I/Q orthogonal analog baseband signal to other secondary intelligent terminals through the Bluetooth device.
  • Step 203 Each secondary terminal sends feedback information to the primary terminal.
  • it may include:
  • the multiple sub-intelligent terminals respectively pass the intermediate frequency quadrature modulation and up-conversion, and then pass through the transmit filter, and the signal output by the filter passes the power first.
  • the stage is amplified to reach the excitation level required by the final stage RF power amplifier, and finally passed through the power amplifier PA and then transmitted to the cell site.
  • the cell base station After receiving the uplink signal transmitted by each sub-intelligent terminal, the cell base station performs a signal-to-noise ratio SIR calculation based on the signal requirement of the wireless communication link, and then respectively sends a power adjustment TPC command to each sub-intelligent terminal, and each sub-intelligence The terminal then adjusts its transmit power.
  • the secondary intelligent terminal feeds back the received power value P1 to the primary intelligent terminal.
  • Step 204 The primary terminal processes the received feedback information to determine the transmitting terminal.
  • the primary intelligent terminal sorts the transmit power values ⁇ power1, power2, power3... ⁇ of each secondary intelligent terminal, and selects the minimum value of Min ⁇ power1, power2, power3... ⁇
  • the secondary intelligent terminal is used as the uplink signal transmitting terminal of the call, and the antenna is used as the transmitting antenna of the call.
  • the transmission power of the terminal is proportional to the intensity of the electromagnetic radiation, the greater the transmission power, the greater the electromagnetic radiation intensity.
  • the primary intelligent terminal sorts the spatial loss power values ⁇ P1, ⁇ P2, ⁇ P3... ⁇ of the respective secondary intelligent terminals, and selects the maximum values Max ⁇ P1, ⁇ P2, ⁇ P3... ⁇
  • the secondary intelligent terminal is used as the uplink signal transmitting terminal of the call, and the antenna is used as the transmitting antenna of the call.
  • the primary intelligent terminal actively disconnects the Bluetooth wireless connection with each of the secondary intelligent terminals except the transmitting terminal.
  • step 205 the master terminal monitors the transmit power of the transmitting terminal.
  • the position between the primary intelligent terminal and the secondary intelligent terminal changes, the azimuth of the terminal antenna changes, and the omnidirectional radiated power of the terminal changes.
  • the transmission effect of the uplink changes, and the signal-to-noise ratio SIR also changes. Therefore, during the call of the primary intelligent terminal, the power variation of the uplink signal transmitting terminal is monitored, and whether the transmission power value is increased more or not, if the transmission power is increased by more than 3dB, the primary intelligent terminal will reselect the transmitting terminal of the uplink signal according to the previous selection process.
  • the transmitting terminal continues to pass the intermediate frequency quadrature modulation and up-conversion, and then passes through the transmission filter.
  • the signal output by the filter is first amplified by the power stage to reach the final stage RF power amplifier.
  • the excitation level is finally passed through the power amplifier PA, and finally the modulated carrier is transmitted through the transmitting terminal antenna.
  • the embodiment of the invention also discloses a computer program, comprising program instructions, which when executed by a computer, enable the computer to perform any of the above methods for selecting a transmitting terminal.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • an embodiment of the present invention further provides a master terminal, as shown in FIG. 3, the master terminal includes: a sending module 31, a receiving module 32, and a selecting module 33;
  • the sending module 31 is configured to: send a baseband signal to each secondary terminal by using a wireless device;
  • the receiving module 32 is configured to: receive feedback information returned by each secondary terminal;
  • the selecting module 33 is configured to: select an optimal secondary terminal as the transmitting terminal according to the feedback information; specifically, configured to: receive the transmit power returned by each secondary terminal; and sort the transmit power of each secondary terminal; Selecting the sub-terminal with the smallest transmit power as the transmitting terminal; specifically, receiving: receiving the received signal power returned by each sub-terminal; calculating the signal power loss value according to the power of the transmitted signal and the received received signal power; The signal power loss values of the respective sub-terminals are sorted; and the sub-terminal with the largest signal power loss value is selected as the transmitting terminal.
  • the processing module 34 is configured to: turn off the power of the radio frequency transmitting circuit of the radio frequency transmission circuit; and set the timing of the uplink transmit power of the transmitting terminal to determine whether the uplink transmit power meets the preset requirement; When the transmission power does not meet the preset requirement, the new transmitting terminal is reselected; and is further configured to: disconnect the wireless connection with each of the secondary terminals except the transmitting terminal.
  • the problem of high radiation intensity damage caused by the terminal to the human head is solved, and the electromagnetic radiation emitted by the radio wave to the human head during the conversation is reduced by the selection and use of the optimal secondary terminal.
  • the solution of the invention solves the problem of high radiation intensity damage caused by the terminal to the human head, and reduces the electromagnetic radiation of the emitted radio waves to the human head during the conversation by selecting and using the optimal secondary terminal. Therefore, the present invention has strong industrial applicability.

Abstract

一种选择发射终端的方法及主终端，应用于存在有至少三个终端的场景中，其中，所述方法包括：主终端通过无线装置向各副终端发送基带信号；所述主终端接收所述各副终端返回的反馈信息；所述主终端根据所述反馈信息选择最优副终端作为发射终端，通过本发明的方案，解决了终端对人体头部所造成的高辐射强度伤害的问题，通过最优副终端的选取使用，降低了通话过程中，发射的无线电波对人头的电磁辐射。

Description

一种选择发射终端的方法及主终端 技术领域
本发明涉及选择发射终端的技术领域，尤其涉及一种选择发射终端的方法及主终端。
背景技术
随着人们生活水平的提高，各类智能终端(手机，穿戴终端)已走入寻常百姓家，成为人们日常信息交流不可或缺的工具。人们使用智能终端时，终端和人体的距离很近，当使用智能无线终端进行语音通话，终端听筒会紧贴人体头部。终端工作时，终端天线对外发射无线电波，无线电波会对紧贴的人体头部产生电磁辐射，长时间的使用智能终端进行语音通话，对人体健康带来不良隐患。且当基站信号强度较低时，为了保证无线通信的链路质量，终端会提高自身的发射功率，可能会至最大发射功率(例如，GSM900的最大发射功率可达到33dBm)。通话过程中，发射功率越大，智能终端对人体头部的辐射强度越强。
发明内容
本发明的目的是提供一种选择发射终端的方法及主终端，以解决终端对人体头部所造成的高辐射强度伤害的问题。
为了实现上述目的，采用如下技术方案：
一种选择发射终端的方法，所述方法包括：
主终端通过无线装置向至少两个副终端发送基带信号；
所述主终端接收至少两个所述副终端返回的反馈信息；
所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端。
可选地，所述主终端通过无线装置向至少两个副终端发送基带信号的步骤之前，该方法还包括：
所述主终端对控制命令进行编码，并将编码后的控制命令发送给无线装 置；
所述无线装置将所述编码后的控制命令编码封装为第一AT指令，并将所述第一AT指令发送给至少两个所述副终端；
至少两个所述副终端将接收到的所述第一AT指令转换为标准AT指令，并执行所述标准AT指令，实现通过所述无线装置与所述主终端的无线连接。
可选地，所述主终端通过无线装置向至少两个副终端发送基带信号时，该方法还包括：
所述主终端关闭自身的射频发射电路电源，以保证不发射上行信号。
可选地，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤包括：
所述主终端接收至少两个所述副终端返回的发射功率；
所述主终端对至少两个所述副终端的发射功率进行排序；
所述主终端选择发射功率最小的副终端作为所述发射终端。
可选地，所述主终端通过无线装置向至少两个副终端发送基带信号的步骤之后，该方法还包括：
所述各副终端对接收到的基带信号分别进行调制放大得到射频信号，并将所述射频信号发送给对应的基站；
所述基站对所述射频信号进行信噪比计算，得到至少两个所述副终端的发射功率，并将得到的发射功率发送给至少两个所述副终端。
可选地，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤包括：
所述主终端接收至少两个所述副终端返回的接收信号功率；
所述主终端根据自身的发送信号功率以及接收到的接收信号功率计算至少两个所述副终端的信号功率损耗值；
所述主终端对至少两个所述副终端的信号功率损耗值进行排序；
所述主终端选择信号功率损耗值最大的副终端作为所述发射终端。
可选地，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤之后，该方法还包括：
所述主终端定时监测所述发射终端的上行发射功率，确定所述上行发射 功率是否符合预设要求；
当所述上行发射功率不符合预设要求时，所述主终端重新选择新的发射终端。
可选地，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤之后，该方法还包括：
所述主终端断开与除所述发射终端之外的所有副终端的无线连接。
一种主终端，所述主终端包括：发送模块，接收模块和选择模块，其中，
所述发送模块设置成：通过无线装置向至少两个副终端发送基带信号；
所述接收模块设置成：接收至少两个所述副终端返回的反馈信息；
所述选择模块设置成：根据所接收到的反馈信息选择最优副终端作为发射终端。
可选地，所述主终端还包括处理模块；
所述处理模块设置成：关闭自身的射频发射电路电源。
可选地，所述选择模块设置成按照如下方式根据所接收到的反馈信息选择最优副终端作为发射终端：
接收所述至少两个所述副终端返回的发射功率；
对至少两个所述副终端的发射功率进行排序；
选择发射功率最小的副终端作为所述发射终端。
可选地，所述选择模块设置成按照如下方式根据所接收到的反馈信息选择最优副终端作为发射终端：
接收至少两个所述副终端返回的接收信号功率；
根据自身的发送信号功率以及接收到的接收信号功率计算至少两个所述副终端的信号功率损耗值；
对至少两个所述副终端的信号功率损耗值进行排序；
选择信号功率损耗值最大的副终端作为发射终端。
可选地，所述处理模块还设置成：定时监测所述发射终端的上行发射功率，确定所述上行发射功率是否符合预设要求；
所述选择模块还设置成：当所述上行发射功率不符合预设要求时，重新 选择新的发射终端。
可选地，所述处理模块还设置成：断开所述主终端与除所述发射终端之外的所有副终端的无线连接。可选地可选地可选地可选地可选地可选地可选地可选地可选地可选地可选地可选地
一种计算机程序，包括程序指令，当该程序指令被计算机执行时，使得该计算机可执行上述任意的选择发射终端的方法。
一种载有所述计算机程序的载体。
通过本发明的方案，解决了终端对人体头部所造成的高辐射强度伤害的问题，通过最优副终端的选取使用，降低了通话过程中，发射的无线电波对人头的电磁辐射。
附图概述
图1为本发明实施例所提供的选择发射终端的流程示意图；
图2为本发明实施例所提供的选择发射终端的具体流程示意图；
图3为本发明实施例所提供的主终端的装置结构示意图。
本发明的较佳实施方式
下面将结合附图对具体实施例进行详细描述。
图1为本发明实施例所提供的选择发射终端的方法，该方法包括：
步骤101，主终端通过无线装置向各副终端发送基带信号。
在本步骤之前，还包括：
所述主终端对控制命令进行编码，并将编码后的控制命令发送给无线装置；
所述无线装置将所述编码后的控制命令编码封装为第一AT指令，并将所述第一AT指令发送给所述各副终端；
所述各副终端将接收到的所述第一AT指令转换为标准AT指令，并执行所述标准AT指令，实现通过所述无线装置与所述主终端的无线连接。
在本步骤执行过程中，还包括：
所述主终端关闭自身的射频发射电路电源，以保证不发射上行信号。
步骤102，所述主终端接收所述各副终端返回的反馈信息。
步骤103，所述主终端根据所述反馈信息选择最优副终端作为发射终端。
本步骤中，可选地，所述主终端根据所述反馈信息选择最优副终端作为发射终端，具体为：
所述主终端接收所述各副终端返回的发射功率；
所述主终端对所述各副终端的发射功率进行排序；
所述主终端选择所述发射功率最小的副终端作为发射终端。
可选地，所述主终端通过无线装置向各副终端发送基带信号之后，还包括：
所述各副终端对接收到的基带信号分别进行调制放大得到射频信号，并将所述射频信号发送给对应的基站；
所述基站对所述射频信号进行信噪比计算，得到所述各副终端的发射功率，并将得到的发射功率发送给所述各副终端。
其中，本步骤中，所述主终端根据所述反馈信息选择最优副终端作为发射终端，具体为：
所述主终端接收所述各副终端返回的接收信号功率；
所述主终端根据自身的发送信号功率以及接收到的接收信号功率计算信号功率损耗值；
所述主终端对所述各副终端的信号功率损耗值进行排序；
所述主终端选择所述信号功率损耗值最大的副终端作为发射终端。
可选地，本步骤之后，还包括：
所述主终端定时监测所述发射终端的上行发射功率，确定所述上行发射功率是否符合预设要求；
当所述上行发射功率不符合预设要求时，所述主终端重新选择新的发射 终端。
以及，所述主终端断开与除所述发射终端之外的各副终端的无线连接。
为了更好地说明本发明方案的意图，下面以一个具体实施例进行阐述。其中的无线装置可以是蓝牙设备或者WIFI，多个终端设备可以为智能手表、智能手环等，如图2所示，以蓝牙设备作为无线装置进行阐述。
当用户需要拨打或接听电话时，具体的，
步骤201，主终端通过蓝牙设备与各副终端进行无线连接。
在本步骤中，主智能终端处理器将内置的控制命令进行编码发送给蓝牙芯片，蓝牙芯片对该命令字符串按蓝牙AT(Attention)指令集合进行编码，经蓝牙天线发送给各副智能终端蓝牙通讯装置，各副智能终端蓝牙通讯装置将主智能终端传送过来的蓝牙AT指令转换为通讯标准AT指令，并发送给各自的处理器，各副智能终端处理器执行AT指令，分别启动各副智能终端的射频电路。
可选地，在主智能终端与各副智能终端无线连接后，主智能终端控制器控制关闭自身的射频发射电路的电源，即主智能终端的射频发射电路和发射天线停止工作,主智能终端不发射上行信号。
步骤202，主终端通过蓝牙设备向各副终端发送基带信号。
具体的，主智能终端控制器将自身的I/Q正交模拟基带信号通过蓝牙设备传送给其他副智能终端。
步骤203，各副终端向主终端发送反馈信息。
具体的，可以包括：
(1)多个副智能终端分别接收到主智能终端的I/Q正交模拟基带信号后，分别经过中频正交调制和上变频后，再经过发射滤波器，滤波器输出的信号先通过功率级放大以达到末级RF功放所需的激励电平，最后经过功率放大器PA，然后发射给小区基站。小区基站接收到各个副智能终端的发射的上行信号后，会基于满足无线通信链路的信号要求，基站进行信噪比SIR计算，然后对各个副智能终端分别发出功率调整TPC指令，各个副智能终端随之调整其发射功率。
(2)其中，主智能终端经过蓝牙天线，发送的蓝牙信号功率为P，其中一个副智能终端接收到的蓝牙信号功率为P1，则空间功率损耗为ΔP1＝P-P1。副智能终端反馈接收功率数值P1给主智能终端。
步骤204，主终端对接收到的反馈信息进行处理，确定发射终端。
具体的，
在上述步骤203的(1)之后，主智能终端对各个副智能终端的发射功率数值{power1,power2,power3...}进行排序，选取其中数值最小Min{power1,power2,power3...}的副智能终端，作为此次通话的上行信号发射终端，其天线则作为此次通话的发射天线。
因为终端的发射功率和电磁辐射强度成正比关系，发射功率越大，其电磁辐射强度就越大。通过在多个终端之中，选择发射功率最低的终端，可以显著降低电磁辐射强度，降低用户长时间使用手机的风险。
在上述步骤203的(2)之后，主智能终端对各个副智能终端的空间损耗功率值{ΔP1,ΔP2,ΔP3...}进行排序，选取数值最大Max{ΔP1,ΔP2,ΔP3...}的副智能终端作为此次通话的上行信号发射终端，其天线则作为此次通话的发射天线。
空间损耗越大，即ΔP1越大，主智能终端与此副智能终端的距离就越大。因为电磁辐射强度会随着距离增大而下降，副智能终端作为发射终端，和主智能终端的距离越大，其信号发射过程中的电磁辐射强度越小，对使用者的安全隐患就越小。
可选地，主智能终端在选好发射终端后，主智能终端主动断开与除发射终端之外的其它各副智能终端的蓝牙无线连接。
步骤205，主终端监控发射终端的发射功率。
具体的，因为用户在通话过程中会进行位置移动，主智能终端与副智能终端间的位置会发生改变，终端天线的方位角也会随之发生改变，终端全向辐射功率会发生改变，则上行链路的发射效果会发生改变，其信噪比SIR也随着发生改变。所以在主智能终端通话过程中，会监控上行信号发射终端的功率变化，确定其发射功率值是否增加较多，如果发射功率提高幅度大于 3dB，则主智能终端会按照之前选择流程，重新选择上行信号的发射终端。如果发射功率提高幅度小于3dB，发射终端继续将接收到的信号经过中频正交调制和上变频后，再经过发射滤波器，滤波器输出的信号先通过功率级放大以达到末级RF功放所需的激励电平，最后经过功率放大器PA，最后通过发射终端天线把已调载波发射出去。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被计算机执行时，使得该计算机可执行上述任意的选择发射终端的方法。
本发明实施例还公开了一种载有所述计算机程序的载体。
为了实现本发明的目的，本发明实施例还提供了一种主终端，如图3所示，所述主终端包括：发送模块31，接收模块32和选择模块33；
所述发送模块31，设置成：通过无线装置向各副终端发送基带信号；
所述接收模块32，设置成：接收所述各副终端返回的反馈信息；
所述选择模块33，设置成：根据所述反馈信息选择最优副终端作为发射终端；具体设置成：接收所述各副终端返回的发射功率；对所述各副终端的发射功率进行排序；选择所述发射功率最小的副终端作为发射终端；具体设置成：接收所述各副终端返回的接收信号功率；根据自身的发送信号功率以及接收到的接收信号功率计算信号功率损耗值；对所述各副终端的信号功率损耗值进行排序；选择所述信号功率损耗值最大的副终端作为发射终端。
处理模块34，设置成：关闭自身的射频发射电路电源；还设置成：定时监测所述发射终端的上行发射功率，确定所述上行发射功率是否符合预设要求；还设置成：当所述上行发射功率不符合预设要求时，重新选择新的发射终端；还设置成：断开与除所述发射终端之外的各副终端的无线连接。
通过本发明的方案，解决了终端对人体头部所造成的高辐射强度伤害的问题，通过最优副终端的选取使用，降低了通话过程中，发射的无线电波对人头的电磁辐射。
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普 通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。
工业实用性
本发明的方案，解决了终端对人体头部所造成的高辐射强度伤害的问题，通过最优副终端的选取使用，降低了通话过程中，发射的无线电波对人头的电磁辐射。因此本发明具有很强的工业实用性。

Claims (14)

  1. 一种选择发射终端的方法，所述方法包括：
    主终端通过无线装置向至少两个副终端发送基带信号；
    所述主终端接收至少两个所述副终端返回的反馈信息；
    所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端。
  2. 如权利要求1所述的选择发射终端的方法，其中，所述主终端通过无线装置向至少两个副终端发送基带信号的步骤之前，该方法还包括：
    所述主终端对控制命令进行编码，并将编码后的控制命令发送给无线装置；
    所述无线装置将所述编码后的控制命令编码封装为第一AT指令，并将所述第一AT指令发送给至少两个所述副终端；
    至少两个所述副终端将接收到的所述第一AT指令转换为标准AT指令，并执行所述标准AT指令，实现通过所述无线装置与所述主终端的无线连接。
  3. 如权利要求1所述的选择发射终端的方法，其中，所述主终端通过无线装置向至少两个副终端发送基带信号时，该方法还包括：
    所述主终端关闭自身的射频发射电路电源，以保证不发射上行信号。
  4. 如权利要求1所述的选择发射终端的方法，其中，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤包括：
    所述主终端接收至少两个所述副终端返回的发射功率；
    所述主终端对至少两个所述副终端的发射功率进行排序；
    所述主终端选择发射功率最小的副终端作为所述发射终端。
  5. 如权利要求4所述的选择发射终端的方法，其中，所述主终端通过无线装置向至少两个副终端发送基带信号的步骤之后，该方法还包括：
    所述各副终端对接收到的基带信号分别进行调制放大得到射频信号，并将所述射频信号发送给对应的基站；
    所述基站对所述射频信号进行信噪比计算，得到至少两个所述副终端的发射功率，并将得到的发射功率发送给至少两个所述副终端。
  6. 如权利要求1所述的选择发射终端的方法，其中，所述主终端根据所 接收到的反馈信息选择最优副终端作为发射终端的步骤包括：
    所述主终端接收至少两个所述副终端返回的接收信号功率；
    所述主终端根据自身的发送信号功率以及接收到的接收信号功率计算至少两个所述副终端的信号功率损耗值；
    所述主终端对至少两个所述副终端的信号功率损耗值进行排序；
    所述主终端选择信号功率损耗值最大的副终端作为所述发射终端。
  7. 如权利要求1所述的选择发射终端的方法，其中，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤之后，该方法还包括：
    所述主终端定时监测所述发射终端的上行发射功率，确定所述上行发射功率是否符合预设要求；
    当所述上行发射功率不符合预设要求时，所述主终端重新选择新的发射终端。
  8. 如权利要求1所述的选择发射终端的方法，其中，所述主终端根据所接收到的反馈信息选择最优副终端作为发射终端的步骤之后，该方法还包括：
    所述主终端断开与除所述发射终端之外的所有副终端的无线连接。
  9. 一种主终端，所述主终端包括：发送模块，接收模块和选择模块，其中，
    所述发送模块设置成：通过无线装置向至少两个副终端发送基带信号；
    所述接收模块设置成：接收至少两个所述副终端返回的反馈信息；
    所述选择模块设置成：根据所接收到的反馈信息选择最优副终端作为发射终端。
  10. 如权利要求9所述的主终端，其中，所述主终端还包括处理模块；
    所述处理模块设置成：关闭自身的射频发射电路电源。
  11. 如权利要求9所述的主终端，其中，所述选择模块设置成按照如下方式根据所接收到的反馈信息选择最优副终端作为发射终端：
    接收所述至少两个所述副终端返回的发射功率；
    对至少两个所述副终端的发射功率进行排序；
    选择发射功率最小的副终端作为所述发射终端。
  12. 如权利要求9所述的主终端，其中，所述选择模块设置成按照如下 方式根据所接收到的反馈信息选择最优副终端作为发射终端：
    接收至少两个所述副终端返回的接收信号功率；
    根据自身的发送信号功率以及接收到的接收信号功率计算至少两个所述副终端的信号功率损耗值；
    对至少两个所述副终端的信号功率损耗值进行排序；
    选择信号功率损耗值最大的副终端作为发射终端。
  13. 如权利要求9所述的主终端，其中，
    所述处理模块还设置成：定时监测所述发射终端的上行发射功率，确定所述上行发射功率是否符合预设要求；
    所述选择模块还设置成：当所述上行发射功率不符合预设要求时，重新选择新的发射终端。
  14. 如权利要求9所述的主终端，其中，
    所述处理模块还设置成：断开所述主终端与除所述发射终端之外的所有副终端的无线连接。
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