CN105743602A - Method and system for preventing radio frequency signal from interfering USB (Universal Serial Bus) data transmission - Google Patents

Method and system for preventing radio frequency signal from interfering USB (Universal Serial Bus) data transmission Download PDF

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Publication number
CN105743602A
CN105743602A CN201610227642.4A CN201610227642A CN105743602A CN 105743602 A CN105743602 A CN 105743602A CN 201610227642 A CN201610227642 A CN 201610227642A CN 105743602 A CN105743602 A CN 105743602A
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China
Prior art keywords
mobile equipment
value
described mobile
radiofrequency signal
transmitting power
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CN201610227642.4A
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Chinese (zh)
Inventor
杨金胜
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN201610227642.4A priority Critical patent/CN105743602A/en
Publication of CN105743602A publication Critical patent/CN105743602A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00Jamming of communication; Counter-measures
    • H04K3/20Countermeasures against jamming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/10Monitoring; Testing of transmitters
    • H04B17/101Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
    • H04B17/102Power radiated at antenna
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00Jamming of communication; Counter-measures
    • H04K3/20Countermeasures against jamming
    • H04K3/22Countermeasures against jamming including jamming detection and monitoring
    • H04K3/224Countermeasures against jamming including jamming detection and monitoring with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04KSECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00Jamming of communication; Counter-measures
    • H04K3/20Countermeasures against jamming
    • H04K3/22Countermeasures against jamming including jamming detection and monitoring
    • H04K3/224Countermeasures against jamming including jamming detection and monitoring with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
    • H04K3/228Elimination in the received signal of jamming or of data corrupted by jamming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/44TPC being performed in particular situations in connection with interruption of transmission

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to a method and system for preventing a radio frequency signal from interfering USB (Universal Serial Bus) data transmission. The method comprises the following steps: when a mobile device transmits the radio frequency signal, detecting whether a USB interface of the mobile device is in data transmission; and if so, then performing power back-off, and reducing the transmitting power of the mobile device. Based on the technical scheme of the invention, when the mobile device transmits the radio frequency signal, if the USB interface of the mobile device is transmitting data, then the transmitting power of the radio frequency signal is backed off, and the radio frequency signal strength radiated by the mobile device is reduced, so as to effectively prevent the radio frequency signal from interfering the USB data transmission, and avoid USB data transmission failures.

Description

Prevent the method and system of radiofrequency signal interference USB data transmission
Technical field
The present invention relates to the radio frequency control field of mobile equipment, particularly relate to a kind of method and system preventing radiofrequency signal interference USB data transmission.
Background technology
Now, the mobile equipment such as mobile phone, flat board is widely used in daily life by its function become stronger day by day.Mobile equipment volume is little, easy to carry, but by the restriction of volume, on mobile equipment, the positional distance USB interface of antenna all relativelys close to, with reference to shown in Fig. 1, when antenna is near USB interface, if radiofrequency signal launched by antenna, give off very strong electromagnetic field, then can affect the normal operation of USB interface, if now USB interface is transmitting data, then may result in USB data transmission and interrupt so that data transmission fails.
Summary of the invention
Based on this, for solving the problems of the prior art, the present invention provides a kind of method and system preventing radiofrequency signal interference USB data transmission, it is possible to the transmitting power of rollback radiofrequency signal when USB interface transmits data, it is prevented that radiofrequency signal interference USB data transmission.
For achieving the above object, the embodiment of the present invention is by the following technical solutions:
A kind of method preventing radiofrequency signal interference USB data transmission, comprises the steps:
When mobile equipment launches radiofrequency signal, whether detect the USB interface of described mobile equipment in transmission data;
If so, then carry out back-off, reduce the transmitting power of described mobile equipment.
The present invention also provides for a kind of system preventing radiofrequency signal interference USB data transmission, including:
Whether detection module, for when mobile equipment launches radiofrequency signal, detecting the USB interface of described mobile equipment in transmission data;
Power control module, when the USB interface for launching radiofrequency signal and described mobile equipment at described mobile equipment transmits data, carries out back-off, reduces the transmitting power of described mobile equipment.
Technique scheme based on the present invention, when mobile equipment launches radiofrequency signal, if learning that the USB interface of mobile equipment is transmitting data, the then transmitting power of rollback radiofrequency signal, reduce the RF signal strength of mobile radiation of equipment, thus effectively preventing radiofrequency signal interference USB data transmission, it is to avoid USB data transmission failure.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in prior art, mobile equipment launches radiofrequency signal interference USB data transmission;
Fig. 2 is the method schematic flow sheet in one embodiment preventing radiofrequency signal interference USB data transmission of the present invention;
Fig. 3 is the method schematic flow sheet in another embodiment preventing radiofrequency signal interference USB data transmission of the present invention;
Fig. 4 is the system structural representation in one embodiment preventing radiofrequency signal interference USB data transmission of the present invention;
Fig. 5 is the structural representation of adjustment module in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with preferred embodiment and accompanying drawing, present disclosure is described in further detail.Obviously, embodiment described below is only used for explaining the present invention, but not limitation of the invention.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Should be noted that, mobile equipment described in the embodiment of the present invention comprises the steps that mobile phone, Intelligent flat, PDA (PersonalDigitalAssistant, personal digital assistant) etc., and above-mentioned mobile equipment is only citing, and non exhaustive, including but not limited to the said equipment.Although it should be appreciated that adopt term " first ", " second " etc. to describe various information hereinafter, but these information should not necessarily be limited by these terms, these terms are only used for being distinguished from each other out same type of information.Such as, without departing from the present invention, " first " information can also be referred to as " second " information, similar, and " second " information can also be referred to as " first " information.It also should be noted that, for the ease of describing, accompanying drawing illustrate only part related to the present invention but not full content.
Fig. 2 is the method schematic flow sheet in one embodiment preventing radiofrequency signal interference USB data transmission of the present invention.As in figure 2 it is shown, the method preventing radiofrequency signal interference USB data transmission in the present embodiment comprises the following steps:
Whether step S110, when mobile equipment launches radiofrequency signal, detect the USB interface of described mobile equipment in transmission data;If so, step S130 is then entered;If it is not, then enter step S120;
The frequency range of radiofrequency signal (RadioFrequency) is between 300KHz to 300GHz, and it is a kind of high-frequency ac change electromagnetic wave.USB (UniversalSerialBus, USB (universal serial bus)) interface is the interface being connected and communicate with between equipment, props up plug and play and warm connection function, one of ready-made interface that must join for all kinds of smart machines of holding equipment.Various researchs all show USB data transmission be interfered when mobile equipment launches radiofrequency signal, and whether the USB interface that therefore need to detect mobile equipment when mobile equipment launches radiofrequency signal is transmitting data.Mobile equipment is for mobile phone, when user is by mobile phone communication, online, need to send voice packet or packet, signaling information to base station, now mobile phone launches radiofrequency signal by antenna, for preventing radiofrequency signal interference USB data transmission, whether the processor of mobile phone need to detect mobile phone USB interface in transmission data.
It should be noted that whether the mobile equipment in the present embodiment can detect USB interface in real time in transmission data when launching radiofrequency signal, it is also possible to periodically detect USB interface when launching radiofrequency signal whether in transmission data, the invention is not limited in this regard.
Step S120, mobile equipment keeps normal transmitting power;
When mobile equipment transmits data not over USB interface, normal transmitting power can be kept to communicate.Under normal circumstances, if mobile equipment constantly moves, the spacing of mobile equipment and base station is continually changing, therefore the transmitting power moving equipment neither be changeless, base station is different according to distance, sending power level signal to mobile equipment, mobile equipment can be automatically adjusted transmitting power according to power level after receiving power level signal.Close to base station, transmitting power is little, and away from base station, transmitting power is big.
Step S130, carries out back-off, reduces the transmitting power of described mobile equipment.
If current mobile device learns that USB interface is transmitting data, then the equipment that moves carries out back-off, reduces the transmitting power of radiofrequency signal, thus reducing the RF signal strength of radiation, it is prevented that USB data transmission is impacted by radiofrequency signal.
In the optional embodiment of one, back-off can be carried out according to the value pre-set, it is reduced to a value pre-set by the value of the transmitting power of radiofrequency signal, this value pre-set can obtain by experiment, when the value of transmitting power is this value pre-set, mobile equipment can keep communication quality, will not USB data transmission be interfered again.
Preferably, after the transmitting power being reduced mobile equipment by back-off, it is also possible to the state of detection USB interface transmission data, if detecting, USB interface transmission data are suspended, or transmission data are complete, then the value of the transmitting power of mobile equipment can be reverted to the value before adjustment.For mobile phone, when user surfs the Net, radiofrequency signal launched by antenna, assume that transmitting power is that (absolute power of radiofrequency signal conventional dBm, dBW represent 33dBm, 1 watt is equal to 30dBm, is also equal to 0dBW), if now mobile phone is by USB interface and PC transmission data, then transmitting power is reduced to 30dBm from 33dBm by back-off by mobile phone, it is prevented that the USB data transmission between radiofrequency signal interference handset and PC.If transmitting data time-out between mobile phone and PC or transmission data being complete, then the transmitting power of mobile phone is reverted to 33dBm, make mobile phone keep original transmitting power to communicate, strengthen communication efficiency.
Further, when carrying out back-off, mobile equipment can also generate information, for instance is pointed out by pop-up display window, flash lamp or voice, informing that user is in order to prevent radiofrequency signal interference USB data transmission, mobile equipment has automatically turned down transmitting power.
In sum, the method preventing radiofrequency signal interference USB data transmission in the present embodiment, when mobile equipment launches radiofrequency signal, if learning that its USB interface is transmitting data, the then transmitting power of rollback radiofrequency signal, reduce the RF signal strength of radiation, thus effectively preventing radiofrequency signal interference USB data transmission, it is to avoid USB data transmission failure.
Fig. 3 is the method schematic flow sheet in another embodiment preventing radiofrequency signal interference USB data transmission of the present invention.As it is shown on figure 3, the method preventing radiofrequency signal interference USB data transmission in the present embodiment comprises the following steps:
Whether step S210, when mobile equipment launches radiofrequency signal, detect the USB interface of described mobile equipment in transmission data;If so, step S230 is then entered;If it is not, then enter step S220;
Step S220, mobile equipment keeps normal transmitting power;
Step S230, carries out back-off, reads the power level that mobile equipment is current, the value of the transmitting power of described mobile equipment is reduced to the setting power value that current power level is corresponding.
The present embodiment and a upper embodiment are distinctive in that, if learning that the USB interface of mobile equipment is transmitting data in this example, then read the power level that mobile equipment is current, and carry out back-off according to the setting power value that current power level is corresponding.
Concrete, existing explanation above, continuous along with mobile equipment is moved, distance between mobile equipment and base station is continually changing, base station is by the difference according to distance, sending power level signal to mobile equipment, in the nonvolatile memory of mobile equipment, the parameter (i.e. NV parameter) of storage, contains the transmitting power that different capacity rank is corresponding.Mobile equipment can be automatically adjusted transmitting power according to power level after receiving the power level signal that base station sends.
In the present embodiment, also comprising the setting power value that each power level is corresponding in NV parameter, this setting power value can be used for back-off.Such as, when mobile equipment launches radiofrequency signal according to the transmitting power that a certain power level is corresponding, if the USB interface of mobile equipment is transmitting data, then read current power level, the setting power value that current power level is corresponding is determined from NV parameter, then the value of the transmitting power of mobile equipment is reduced to this setting power value, reduces the intensity of radiofrequency signal, it is prevented that its interference USB interface transmission data.
Preferably, after the value of the transmitting power of mobile equipment is reduced to the setting power value that current power level is corresponding, also continue to the state of detection USB interface transmission data, if detecting, USB interface transmission data are suspended, or transmission data are complete, the value of the transmitting power of mobile equipment then can revert to the value before adjustment, and the transmitting power being about to mobile equipment recalls to the transmitting power that power level current to NV parameter is corresponding.
Above-mentioned setting power value can obtain by experiment, and under a certain power level, when the value of the transmitting power of mobile equipment is this setting power value, mobile equipment can keep communication quality, will not USB data transmission be interfered again.
The transmitting power of each mobile equipment is corresponding with DAC (DigitaltoAnalogConverter, a digital to analog converter) magnitude of voltage.This DAC voltage value is that the digital signal sent by the processor of mobile equipment is converted to through DAC.The transmitting power changing mobile equipment only need to change this DAC voltage value.Therefore, in the present embodiment, NV parameter may also include the DAC voltage value that each setting power value is corresponding, when regulating the transmitting power of mobile equipment, reading the DAC voltage value corresponding with setting power value, the processor of mobile equipment just can regulate the transmitting power of radiofrequency signal according to this DAC voltage value.Further, identical with a upper embodiment, when carrying out back-off, mobile equipment can also automatically generate information, such as pointed out by pop-up display window, flash lamp or voice, informing that user is in order to prevent radiofrequency signal interference USB data transmission, mobile equipment has automatically turned down transmitting power.
In the optional embodiment of one, it is contemplated that USB interface transmission data have different patterns, and different pattern capacity of resisting disturbance is also different, therefore, can be directed to different patterns and do differentiated setting.
In USB2.0 agreement, having three kinds of USB data transmission patterns, respectively low-speed mode, Full-Speed mode, fast mode, which kind of pattern is USB interface select be then the tenability automatic adaptation according to external equipment.Fast mode drive level is very low, and D+ (positive voltage data wire) and the signal width difference on D-(negative voltage data line) are 400mv, it is easier to be disturbed.Under low-speed mode and Full-Speed mode, the signal width difference on D+ and D-is 3.3V, and capacity of resisting disturbance is relatively strong, and low-speed mode message transmission rate is low, and capacity of resisting disturbance is the strongest.Therefore, the pattern according to mobile equipment USB interface transmission data, setting power value three kinds different can be set for different power level.According to different transmitting scenes, automatically select different setting power values and carry out rollback.
Concrete, when mobile equipment launches radiofrequency signal, if detecting, USB interface is transmitting data, then can first judge the pattern of USB interface transmission data, if low-speed mode, the value of the transmitting power of mobile equipment is reduced to the first setting power value W1 that current power level is corresponding;If Full-Speed mode, the value of the transmitting power of mobile equipment is reduced to the second setting power value W2 that current power level is corresponding;If fast mode, then the value of the transmitting power of mobile equipment is reduced to the 3rd setting power value W3 that current power level is corresponding.In conjunction with the difference of different mode capacity of resisting disturbance, each power level can be arranged W1 > W2 > W3.
The method preventing radiofrequency signal interference USB data transmission in the present embodiment, when mobile equipment launches radiofrequency signal, if learning that its USB interface is transmitting data, the transmitting power of the pattern automatic rollback radiofrequency signal of data is then transmitted according to current power level and USB interface, can at the RF signal strength of the premise decline Low emissivity keeping communication quality, thus effectively preventing radiofrequency signal interference USB data transmission, it is to avoid USB data transmission failure.
It should be noted that, for aforesaid each embodiment of the method, in order to simplicity describes, it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other order or carry out simultaneously.
The method preventing radiofrequency signal interference USB data transmission according to the invention described above, the present invention also provides for a kind of system preventing radiofrequency signal interference USB data transmission, below in conjunction with accompanying drawing and preferred embodiment, the system preventing radiofrequency signal interference USB data transmission of the present invention is described in detail.
Fig. 4 is the system structural representation in one embodiment preventing radiofrequency signal interference USB data transmission of the present invention.As shown in Figure 4, the system preventing radiofrequency signal interference USB data transmission in this embodiment includes:
Whether detection module 1, for when mobile equipment launches radiofrequency signal, detecting the USB interface of described mobile equipment in transmission data;
Control module 2, when the USB interface for launching radiofrequency signal and mobile equipment at described mobile equipment transmits data, carry out back-off, reduce the transmitting power of described mobile equipment.
Concrete, if detection module 1 detects that mobile equipment transmits data not over USB interface, mobile equipment can keep normal transmitting power to communicate.If detection module 1 detects that USB interface is transmitting data, then controlling module 2 and carry out back-off, reducing the transmitting power of radiofrequency signal, thus reducing the RF signal strength of radiation, it is prevented that USB data transmission is impacted by radiofrequency signal.
In the optional embodiment of one, control module 2 and can carry out back-off according to the value pre-set, it is reduced to a value pre-set by the value of the transmitting power of radiofrequency signal, this value pre-set can obtain by experiment, when the value of transmitting power is this value pre-set, mobile equipment can keep communication quality, will not USB data transmission be interfered again.
It is also preferred that the left after the transmitting power controlling the mobile equipment of module 2 reduction, if detection module 1 detects USB interface, transmission data are suspended, or transmission data are complete, then power control module 2 can recover the transmitting power of the equipment that moves.
In the optional embodiment of one, shown in Fig. 4, control module 2 and include:
Read module 21, for reading the power level that mobile equipment is current;
Adjustment module 22, for being reduced to, by the value of the transmitting power of described mobile equipment, the setting power value that current power level is corresponding.
Specifically, existing explanation above, continuous along with mobile equipment is moved, distance between mobile equipment and base station is continually changing, base station, by the difference according to distance, sends power level signal to mobile equipment, contains, in mobile equipment NV parameter, the transmitting power that different capacity rank is corresponding.Mobile equipment can be automatically adjusted transmitting power according to power level after receiving the power level signal that base station sends.In the present embodiment, also comprising the setting power value that each power level is corresponding in NV parameter, this setting power value can be used for back-off.When mobile equipment launches radiofrequency signal according to the transmitting power that a certain power level is corresponding, if the USB interface that detection module 1 detects mobile equipment is transmitting data, then read module 21 reads current power level, adjustment module 22 can determine the setting power value that current power level is corresponding from NV parameter, then the value of the transmitting power of mobile equipment is reduced to this setting power value, reduce the intensity of radiofrequency signal, it is prevented that its interference USB interface transmission data.
Optionally, shown in Fig. 4, the system preventing radiofrequency signal interference USB data transmission of the present embodiment, also include reminding module 3, for generating information when carrying out back-off.Reminding module 3 can issue the user with information by modes such as such as pop-up display window, flash lamp or voices, informs that user is in order to prevent radiofrequency signal interference USB data transmission, and mobile equipment has automatically turned down transmitting power
In the optional embodiment of one, with reference to shown in Fig. 5, adjustment module 22 includes:
Judge module 221, for judging the pattern of described USB interface transmission data;
First controls module 222, for when the pattern of described USB interface transmission data is low-speed mode, the value of the transmitting power of described mobile equipment being reduced to the first setting power value that current power level is corresponding;
Second controls module 223, for when the pattern of described USB interface transmission data is Full-Speed mode, the value of the transmitting power of described mobile equipment being reduced to the second setting power value that current power level is corresponding;
3rd controls module 224, for when the pattern of described USB interface transmission data is fast mode, the value of the transmitting power of described mobile equipment being reduced to the 3rd setting power value that current power level is corresponding.
Consider that USB interface transmission data have different patterns, and different pattern capacity of resisting disturbance is also different, therefore, can be directed to different patterns and do differentiated setting.
The above-mentioned system preventing radiofrequency signal interference USB data transmission can perform the method preventing radiofrequency signal interference USB data transmission that the above embodiment of the present invention provides, and possesses the corresponding functional module of execution method and beneficial effect.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.

Claims (10)

1. the method preventing radiofrequency signal interference USB data transmission, it is characterised in that comprise the steps:
When mobile equipment launches radiofrequency signal, whether detect the USB interface of described mobile equipment in transmission data;
If so, then carry out back-off, reduce the transmitting power of described mobile equipment.
2. the method preventing radiofrequency signal interference USB data transmission according to claim 1, it is characterised in that the process of the transmitting power of the described mobile equipment of described reduction is:
Read the power level that described mobile equipment is current;
The value of the transmitting power of described mobile equipment is reduced to the setting power value that current power level is corresponding.
3. the method preventing radiofrequency signal interference USB data transmission according to claim 2, it is characterised in that after the value of the transmitting power of described mobile equipment is reduced to the setting power value that current power level is corresponding, also include:
If detecting, the USB interface transmission data of described mobile equipment are suspended or complete, then the value of the transmitting power of described mobile equipment reverts to the value before adjustment.
4. the method preventing radiofrequency signal interference USB data transmission according to claim 2, it is characterised in that the described value by the transmitting power of described mobile equipment is reduced to the process of setting power value corresponding to current power level and includes:
Read the DAC voltage value corresponding with described setting power value, and regulate the value of the transmitting power of described mobile equipment according to this DAC voltage value.
5. the method preventing radiofrequency signal interference USB data transmission according to claim 1 and 2, it is characterised in that also include:
When carrying out back-off, described mobile equipment generates information.
6. the method preventing radiofrequency signal interference USB data transmission according to claim 2, it is characterised in that the described value by the transmitting power of described mobile equipment is reduced to the process of setting power value corresponding to current power level and includes:
Judge the pattern of described USB interface transmission data;
If low-speed mode, then the value of the transmitting power of described mobile equipment is reduced to the first setting power value that current power level is corresponding;
If Full-Speed mode, then the value of the transmitting power of described mobile equipment is reduced to the second setting power value that current power level is corresponding;
If fast mode, then the value of the transmitting power of described mobile equipment is reduced to the 3rd setting power value that current power level is corresponding.
7. the system preventing radiofrequency signal interference USB data transmission, it is characterised in that including:
Whether detection module, for when mobile equipment launches radiofrequency signal, detecting the USB interface of described mobile equipment in transmission data;
Control module, when the USB interface for launching radiofrequency signal and described mobile equipment at described mobile equipment transmits data, carry out back-off, reduce the transmitting power of described mobile equipment.
8. the system preventing radiofrequency signal interference USB data transmission according to claim 7, it is characterised in that described control module includes:
Read module, for reading the power level that described mobile equipment is current;
Adjustment module, for being reduced to, by the value of the transmitting power of described mobile equipment, the setting power value that current power level is corresponding.
9. the system preventing radiofrequency signal interference USB data transmission according to claim 7 or 8, it is characterised in that also include reminding module, for generating information when carrying out back-off.
10. the system preventing radiofrequency signal interference USB data transmission according to claim 8, it is characterised in that described adjustment module includes:
Judge module, for judging the pattern of described USB interface transmission data;
First controls module, for when the pattern of described USB interface transmission data is low-speed mode, the value of the transmitting power of described mobile equipment being reduced to the first setting power value that current power level is corresponding;
Second controls module, for when the pattern of described USB interface transmission data is Full-Speed mode, the value of the transmitting power of described mobile equipment being reduced to the second setting power value that current power level is corresponding;
3rd controls module, for when the pattern of described USB interface transmission data is fast mode, the value of the transmitting power of described mobile equipment being reduced to the 3rd setting power value that current power level is corresponding.
CN201610227642.4A 2016-04-12 2016-04-12 Method and system for preventing radio frequency signal from interfering USB (Universal Serial Bus) data transmission Pending CN105743602A (en)

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