CN112596111A - Obstacle identification method, device and equipment and readable storage medium - Google Patents
Obstacle identification method, device and equipment and readable storage medium Download PDFInfo
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Abstract
The invention discloses a method, a device, equipment and a readable storage medium for identifying obstacles, wherein the method comprises the following steps: controlling a transmission link of a radio frequency module of the wireless equipment to transmit the obstacle detection signal at a preset transmission power; detecting the receiving power of an obstacle detection signal received by a receiving link of the radio frequency module; if the receiving power of any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0, judging that obstacles exist around the wireless equipment; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain. The invention can utilize the existing antenna and circuit design of the wireless device to identify the obstacles around the wireless device.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a readable storage medium for identifying an obstacle.
Background
Wireless devices with high-gain antennas are often used for outdoor long-distance wireless coverage or signal transmission (for example, a wireless bridge, which is a wireless product for long-distance transmission, is generally equipped with an external high-gain directional antenna, and the antenna gain is as high as more than 10 dBi), when a barrier, especially a metal object, is present near the high-gain antenna, strong reflection is caused, and a signal amplified by the high-gain antenna is reflected back to the antenna by the barrier, so that the performance of the output end of a power amplifier of the antenna is affected, and even the signal is damaged or burnt due to the excessive high power. Therefore, when the antenna of the wireless device performs a signal transmission operation, it is necessary to detect an obstacle around the wireless device.
The current antenna mainly selects a high-frequency band with better imaging for identifying the obstacle, such as 76-77 GHz used by an automobile radar; or more complex antennas, such as a single transmit antenna plus a set of array antennas for reception. While wireless products used for signal coverage or transmission, such as Wi-Fi and mobile communications, are low frequency and typically share antennas for both transceiving and transmitting. If the wireless device identifies an obstacle, it is necessary to separate the transmitting and receiving antennas from the link, or add some couplers for power detection, etc., and it is difficult to identify an obstacle around the wireless device by using the existing antenna and circuit design of the wireless device.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, a device, and a readable storage medium for identifying an obstacle, which can identify an obstacle around a wireless device by using an existing antenna and circuit design of the wireless device.
An embodiment of the present invention provides an obstacle identification method applied to a wireless device, including:
controlling a transmission link of a radio frequency module of the wireless equipment to transmit the obstacle detection signal at a preset transmission power;
detecting the receiving power of an obstacle detection signal received by a receiving link of the radio frequency module;
if the power of any receiving link of the radio frequency module for receiving a new obstacle detection signal after receiving the obstacle detection signal for the first time is greater than 0, judging that obstacles exist around the wireless equipment; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
As an improvement of the above solution, the controlling a transmission link of a radio frequency module of a wireless device to transmit an obstacle detection signal with a preset transmission power includes:
when the wireless equipment is started, controlling a transmitting link of a radio frequency module of the wireless equipment to transmit an obstacle detection signal at preset transmitting power;
or, comprising:
in the process of sending signal data by the wireless equipment, controlling the transmission link of the radio frequency module of the wireless equipment to transmit the obstacle detection signal at a preset transmission power at a fixed time.
As an improvement of the above, after the determining that there is an obstacle around the wireless device, the method further includes:
judging whether the receiving power is larger than a preset safe power threshold value or not;
if yes, judging that the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment can damage a radio frequency amplifier of a transmission link of the wireless equipment;
if not, the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment is judged to influence the performance of a radio frequency amplifier of a transmission link of the wireless equipment.
As an improvement of the above scheme, the safe power threshold P _ safe is P _ max-P _ margin-Iso _ ant _ rx + LNA _ gain;
p _ max is the maximum power that the output end of the rf amplifier of the transmit chain of the wireless device can bear, P _ margin is a preset safety margin, Iso _ ANT _ Rx is the isolation between the ANT port and the Rx port of the rf switch when the rf switch of the receive chain is placed in the state where the Tx channel is open and the Rx channel is closed, and LNA _ gain is the signal gain of the low noise amplifier of the receive chain.
As an improvement of the above, the method further comprises:
if the radio frequency amplifier of the transmission link of the wireless equipment is judged to be damaged, the wireless equipment is controlled to stop signal transmission work, and a safety alarm prompt is sent out;
and if the radio frequency amplifier of the transmitting link of the wireless equipment is judged not to be damaged and the receiving power is judged to be larger than a preset slight risk power threshold value, controlling the wireless equipment to send out a slight risk alarm prompt.
As an improvement of the above solution, the wireless device has a plurality of antennas, and the controlling a transmission link of a radio frequency module of the wireless device to transmit the obstacle detection signal with a preset transmission power includes:
controlling each transmitting link of a radio frequency module of the wireless equipment to sequentially transmit the obstacle detection signal at preset transmitting power;
the detecting the receiving power of the obstacle detection signal of the receiving link of the radio frequency module includes:
after controlling a transmitting link to transmit obstacle detection signals each time, detecting the receiving power of the obstacle detection signals which are not received for the first time of all receiving links of the radio frequency module;
generating a power receiving matrix of the obstacle detection signals according to the receiving power of the obstacle detection signals, which are not received for the first time, of all the receiving links, which are detected for each time;
if the receiving power of any receiving link of the radio frequency module, which receives a new obstacle detection signal after receiving an obstacle detection signal for the first time, is greater than 0, it is determined that an obstacle exists around the wireless device, including:
and if the received power in the power receiving matrix is greater than 0, judging that obstacles exist around the wireless equipment.
Another embodiment of the present invention correspondingly provides an obstacle identification device, which includes:
the signal transmission control module is used for controlling a transmission link of a radio frequency module of the wireless equipment to transmit the obstacle detection signal at preset transmission power;
the detection module is used for detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module;
a first determination module, configured to determine that an obstacle exists around the wireless device if a received power of a new obstacle detection signal received by any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
As an improvement of the above, the apparatus further comprises:
the judging module is used for judging whether the receiving power is larger than a preset safe power threshold value or not;
a second determination module, configured to determine, if yes, that reflection of a signal transmitted by the wireless device by an obstacle around the wireless device may damage a radio frequency amplifier of a transmission link of the wireless device;
and the third judging module is used for judging that the reflection of the surrounding obstacles of the wireless equipment on the signal transmitted by the wireless equipment does not influence the performance of a radio frequency amplifier of a transmitting link of the wireless equipment if the surrounding obstacles do not reflect the signal transmitted by the wireless equipment.
Another embodiment of the present invention provides a wireless device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, and the processor implements the obstacle identification method according to the above embodiment of the invention when executing the computer program.
Another embodiment of the present invention provides a storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, a device where the computer-readable storage medium is located is controlled to execute the obstacle identification method according to the above-described embodiment of the present invention.
Compared with the prior art, one of the technical solutions has the following advantages:
the inventor of the present invention has found through intensive research that a transmitting link of a radio frequency module of a wireless device is controlled to transmit a low-power obstacle detection signal, and for the reflected obstacle detection signal: the characteristic that an ANT port and an RX port of a radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of an obstacle detection signal of a receiving link of a radio frequency module, so that whether obstacles exist around the wireless equipment or not is judged; if the receiving power of any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0, it is determined that an obstacle exists around the wireless device. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module, and does not need to additionally add a directional coupler for power detection. Therefore, the embodiment of the invention can utilize the existing antenna and circuit design of the wireless equipment to identify the obstacles around the wireless equipment. Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
Fig. 1 is a schematic flow chart of an obstacle identification method according to an embodiment of the present invention;
fig. 2 illustrates a process of transceiving an obstacle detection signal by a transmit link of a wireless device in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an obstacle identification device according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a wireless device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic flow chart of an obstacle identification method according to an embodiment of the present invention. The method is applied to a wireless device, and is exemplarily executed by a processor of the wireless device. The method comprises the following steps:
s10, controlling a transmission link of the rf module of the wireless device to transmit the obstacle detection signal with a predetermined transmission power.
Wherein the obstruction detection signal is a special frame added with an identification field. The identification field identifies that the frame is used for detecting obstacles, and distinguishing management frames such as Beacon/ACK and data frames for transmitting information. Here, how to identify the frame of the obstacle detection signal is not particularly required, as long as it can be distinguished from other control frames and data frames, and it is recognized that this is a detection frame. The obstruction detection signal may use a low order modulation, such as MCS 0. Because of the use of low order modulation, the transceiver is able to receive and demodulate weaker signals, and is correspondingly larger in range for determining nearby obstacles. Therefore, the obstacle detection signal can be modulated at a low rate.
In addition, the following requirements can be made on the transmission power of the obstacle detection signal: the transmitting power of the obstacle detection signal is neither too small, but if too small, the obstacle detection signal may not be identified by the receiver after path attenuation, so that whether an obstacle exists near the antenna cannot be judged; the transmission power of the obstacle detection signal cannot be too high, and if the transmission power is too high, the standing wave of the antenna may be too large due to the close-distance metal obstacle, and most energy is reflected back to the transmission link to exceed the upper limit of the power borne by the output end of the power amplifier PA, so that the power amplifier PA is damaged. Supposing that a metal barrier is arranged at a position close to the directional antenna of the wireless device, the signal reflection at the time is close to a total reflection state, and the attenuation of the path of the output signal of the power amplifier PA is ignored when the output signal of the power amplifier PA is transmitted by the antenna- > the barrier reflection- > the antenna receives. If the maximum power that the PA output is subjected to is P _ max, considering that a proper margin of power P _ margin (e.g. 3dB) is left, the power level of the obstacle detection signal is P _ detect ═ P _ max-P _ margin. (P _ detect refers to the power of the obstacle detection signal at the output of the PA).
Specifically, the obstacle detection signal is transmitted in two cases: firstly, after the wireless equipment is powered on and started every time, the wireless equipment can automatically send an obstacle detection signal to judge whether an obstacle exists near the antenna; and secondly, in the process that the wireless equipment normally transmits signal data (namely normally transmits Beacon frames and data frames), the wireless equipment can regularly transmit obstacle detection signals to judge whether obstacles exist nearby the antenna, so that the situation that the wireless equipment is electrified and works for a long time, and the surrounding environment of the antenna changes and is shielded by the obstacles is prevented. The sending time interval time _1 may be set by the user, or may be default of the system, for example, the sending time interval time _1 may be 10min, 1 hour, 12 hours, or 1 day.
As an example, the antenna of the wireless device is a high gain antenna, and the antenna of the wireless device is connected to the radio frequency module.
S11, detecting the receiving power of the obstacle detection signal received by the receiving link of the rf module.
Whether obstacles exist around the wireless equipment and the risk are judged by detecting the power of the obstacle detection signal after reflection. Generally, power detection on a transmission link needs to use a directional coupler, and the inventor finds through research that: the internal ANT port of the radio frequency switch is not completely isolated from the RX port, has a certain coupling degree, and can couple and pass part of electromagnetic wave power energy, so that the radio frequency switch can be used for detecting an obstacle detection signal which is received by the antenna and coupled into the transceiver chip through the radio frequency switch. Therefore, the characteristic that the ANT port and the RX port of the radio frequency switch are not completely isolated and can be coupled to detect the signal power through partial electromagnetic wave power energy is utilized to detect the receiving power of the receiving link of the radio frequency module to the obstacle detection signal, so that whether obstacles exist around the wireless device or not is judged.
Specifically, the propagation path of the obstacle detection signal after encountering an obstacle is as shown in fig. 2. The specific reflection paths may be as follows: one is that the obstacle detection signal is Reflected by the obstacle and then returns to the same radio frequency link, as shown by the Reflected _ signal _11 in the figure, it means that the obstacle detection signal transmitted by the first radio frequency link returns to the first radio frequency link after being Reflected by the obstacle; the other type is that the obstacle detection signal enters another radio frequency link after being Reflected, as shown in the figure, Reflected _ signal _1n, which means that the obstacle detection signal transmitted by the first radio frequency link enters the nth radio frequency link after being Reflected by the obstacle.
When the obstacle detection signal is received by the antenna, the obstacle detection signal reversely enters an ANT port of the radio frequency switch RFswitch, and because the ANT port and the RX port are not completely isolated and can be coupled to pass through partial energy, the power of the obstacle detection signal is attenuated by the interior of the RFswitch to a certain extent, then enters a low noise amplifier LNA (low noise amplifier) for amplification, and then is received and demodulated by the transceiver.
Specifically, S11 includes: calculating the received power Reflected _ signal _ kn of the obstacle detection signal transmitted by the k link, which is not received for the first time by the n link, according to the isolation Iso _ ANT _ RX of the ANT port and the RX port of the radio frequency switch of the receiving link, the loss passage _ kn of the obstacle detection signal transmitted by the transmitting link on the air propagation path between the two antennas received by the receiving link, the transmitting power P _ detect and the signal gain LNA _ gain of the low noise amplifier of the receiving link. The calculation formula is as follows: selected _ signal _ kn is P _ characterized-Passloss _ kn-Iso _ ant _ rx + LNA _ gain.
S12, if the received power of a new obstacle detection signal received by any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0, determining that an obstacle exists around the wireless device; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
The detection of the obstacle detection signal to determine whether an obstacle exists can be divided into the following two cases:
1) reflection detection of the same radio frequency link
If the sending detection signal and the receiving detection signal are the same rf link (including the sending link and the receiving link), the receiving link portion Rx in the rf link detects two detection signals for each sending detection signal: the first detected ping signal is coupled into the RX path from the rf switch internal Tx and RX ports on the link; the second detected detection signal propagates outward through the antenna, encounters an obstacle to reflect, and enters the same receiving chain. The second detected detection signal is used to assess the risk of reflection.
For the second detected obstacle detection signal, it is radiated outward through the antenna, and after encountering an obstacle, it is received by the antenna, and is coupled to the RX port through the ANT port of the transceiver, amplified by the LNA, received and demodulated by the transceiver, and its power is selected as Reflected _ signal _ nn ═ P _ detected-pass _ nn-Iso _ ANT _ RX + LNA _ gain, and the power varies according to whether there is an obstacle outside and how far away the obstacle is (i.e. the above-mentioned pass _ nn indeterminate value varies according to the outside environment).
When the transceiver transmits a fault detection signal and simultaneously receives the fault detection signal, the first fault detection signal can be received and can be judged to be coupled to an Rx path through the interior of the RFswitch; receiving a second detection signal, and if the second obstacle detection signal is received, judging the reflection risk according to the power of the second obstacle detection signal; if the second obstacle detection signal is not received, it indicates that there is no obstacle outside, or the distance between the outside obstacles is too far, the transmission of the wireless signal is hardly affected.
2) Reflection detection between different radio frequency links
If the detection signal transmitted and the detection signal received and transmitted are two different radio frequency links, the kth radio frequency link transmits a detection signal, the nth radio frequency link receives the detection signal, and if a nearby obstacle causes reflection, the two detection signals are detected successively: the first detected detection signal is directly propagated to the nth radio frequency link from the kth radio frequency link; the second detected detection signal is propagated from the k-th radio frequency link, encounters an obstacle reflection, and enters the n-th radio frequency link. Likewise, the second detected detection signal is used to assess the risk of reflection.
For the second detected detection signal, it is radiated outward through the antenna, and after encountering an obstacle, it is received by the antenna, and is coupled to the RX port through the ANT port of the RFSwitch, amplified by the LNA, received and demodulated by the trancer, and its power is selected as P _ desired-pass _ kn-Iso _ ANT _ RX + LNA _ gain, and the power varies according to whether there is an obstacle outside and how far away the obstacle is outside (i.e. the above-mentioned pass _ nn uncertainty varies according to the outside environment).
After a detecting signal is transmitted by a Transceiver kth radio frequency link, the nth radio frequency link receives the detecting signal at the same time, and the received first detecting signal can judge that the signal is directly transmitted to the nth radio frequency link from the kth radio frequency link; receiving a second detection signal, and judging the reflection risk according to the power of the second detection signal; if the second detection signal is not received, it indicates that there is no external obstacle, or the distance of the external obstacle is too far, the wireless signal will hardly be affected.
In the embodiment of the present invention, a low-power obstacle detection signal is transmitted by controlling a transmission link of a radio frequency module of a wireless device, and for a reflected obstacle detection signal, the inventors have found through intensive research that: the characteristic that an ANT port and an RX port of a radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of an obstacle detection signal of a receiving link of a radio frequency module, so that whether obstacles exist around the wireless equipment or not is judged; if the receiving power of any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0, it is determined that an obstacle exists around the wireless device. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module, and does not need to additionally add a directional coupler for power detection. Therefore, the embodiment of the invention can utilize the existing antenna and circuit design of the wireless equipment to identify the obstacles around the wireless equipment.
Further, after the determining that there is an obstacle around the wireless device, the method further includes:
s13, judging whether the receiving power is larger than a preset safe power threshold value;
s14, if yes, judging that the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment can damage the radio frequency amplifier of the transmission link of the wireless equipment;
s15, if not, judging that the reflection of the signal transmitted by the wireless device by the obstacles around the wireless device can influence the performance of the radio frequency amplifier of the transmission link of the wireless device.
In the embodiment of the present invention, the detection result of the received power of the obstacle detection signal is compared with the preset safe power threshold P _ safe and the preset slight risk power threshold refelected _ signal _ kn, and the following risk determination is performed according to the result:
1) and (4) safety level: if the power Reflected _ signal _ kn of the Reflected obstacle detection signals detected by all receiving chains is 0, the receiving chains are considered to be free of obstacles;
2) mild risk rating: if the power of the obstacle detection signal detected by the receiving link is 0 < selected _ signal _ kn < P _ safe, but the power of the obstacle detection signal detected by the receiving link is not greater than or equal to P _ safe, the wireless performance is possibly influenced by the existence of the obstacle, but the radio frequency device cannot be damaged;
3) high risk rating: if the power Reflected _ signal _ kn of the obstacle detection signal detected by any receiving link is larger than or equal to P _ safe, an obstacle is considered to exist, which not only affects the wireless performance, but also may cause the device to be damaged.
According to the risk judgment, the embodiment of the invention performs corresponding protection and alarm functions.
When the safety level is judged, the wireless equipment works normally and transmits signals normally according to the target power.
When the light risk level is judged, the wireless equipment can work normally, normally transmits signals according to the target power, but can give an alarm for reminding, wherein the alarm form is not specifically limited, and the alarm can be given to the user machine type by utilizing different colors of light, the flickering frequency of the light, or a buzzer and the like.
When the high risk level is judged, the wireless equipment stops working wirelessly (including stopping sending Beacon), and meanwhile, alarm reminding is carried out, wherein the alarm form is not specifically limited, and the alarm can be carried out on the user by utilizing different colors of light, the flashing frequency of the light, or a buzzer and the like.
Exemplarily, the safe power threshold P _ safe is P _ max-P _ margin-Iso _ ant _ rx + LNA _ gain; p _ max is the maximum power that the output end of the rf amplifier of the transmit chain of the wireless device can bear, P _ margin is a preset safety margin, Iso _ ANT _ Rx is the isolation between the ANT port and the Rx port of the rf switch when the rf switch of the receive chain is placed in the state where the Tx channel is open and the Rx channel is closed, and LNA _ gain is the signal gain of the low noise amplifier of the receive chain.
In the above embodiment of the invention, further, if the wireless device has multiple antennas, the step S10 includes:
controlling each transmitting link of a radio frequency module of the wireless equipment to sequentially transmit the obstacle detection signal at preset transmitting power;
the step S11 includes:
after controlling a transmitting link to transmit obstacle detection signals each time, detecting the receiving power of the obstacle detection signals which are not received for the first time of all receiving links of the radio frequency module;
and generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the detected receiving links.
The step S12 includes:
and if the received power in the power receiving matrix is greater than 0, judging that obstacles exist around the wireless equipment.
In the embodiment of the invention, when there are multiple antennas, only one specific antenna may transmit due to the position of the obstacle and the directivity of the antenna, and strong reflection may occur when another specific antenna receives the signal. In order to cover and identify the risk of such special situation, each antenna is required to transmit a detection signal in turn, and all antennas are required to receive, so as to finally obtain a received power matrix of the reflected obstacle detection signal, and the risk evaluation is comprehensively performed by analyzing the received power matrix of the reflected obstacle detection signal.
Assuming that the detection signals are sequentially transmitted from 1 radio link to the nth radio link at a certain time interval, every time the fault detection signal is transmitted, all the radio links (1-n) receive the fault detection signal (the rf switch does not switch, and is still in the Tx state, because the switch switching time of the rf switch is much longer than the propagation time of the electromagnetic wave, the Tranceiver receives the detection signal when the rf switch is placed in the Tx path). Finally, a received power matrix of the obstacle detection signal is obtained.
The embodiment of the invention can realize the identification of the obstacles near a plurality of antennas, the receiving power matrix of the obstacle detection signal is obtained by testing through the alternate emission of each antenna and the simultaneous receiving of all the antennas, the testing range can cover a larger space near, and the condition that the obstacles cannot be judged is avoided.
Referring to fig. 2, a schematic structural diagram of an obstacle identification device according to an embodiment of the present invention is shown, including:
a signal transmission control module 10, configured to control a transmission link of a radio frequency module of the wireless device to transmit an obstacle detection signal at a preset transmission power;
a detection module 11, configured to detect a receiving power of an obstacle detection signal received by a receiving link of the radio frequency module;
a first determining module 12, configured to determine that an obstacle exists around the wireless device if power of a new obstacle detection signal received by any receiving link of the radio frequency module after an obstacle detection signal is received for the first time is greater than 0; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
In the embodiment of the present invention, a low-power obstacle detection signal is transmitted by controlling a transmission link of a radio frequency module of a wireless device, and for a reflected obstacle detection signal, the inventors have found through intensive research that: the characteristic that an ANT port and an RX port of a radio frequency switch are not completely isolated and can be coupled with passing power can be utilized to detect the receiving power of an obstacle detection signal of a receiving link of a radio frequency module, so that whether obstacles exist around the wireless equipment or not is judged; if the power of any receiving link of the radio frequency module for receiving a new obstacle detection signal after receiving the obstacle detection signal for the first time is greater than 0, it is determined that an obstacle exists around the wireless device. Therefore, the embodiment of the invention can receive and demodulate the obstacle detection signal through the receiving link of the existing radio frequency module, and does not need to additionally add a directional coupler for power detection. Therefore, the embodiment of the invention can utilize the existing antenna and circuit design of the wireless equipment to identify the obstacles around the wireless equipment.
As an improvement of the above scheme, the signal transmission control module 10 is specifically configured to:
when the wireless device is started, a transmitting link of a radio frequency module of the wireless device is controlled to transmit the obstacle detection signal with preset transmitting power.
Or, the signal transmission control module 10 is specifically configured to:
in the process of sending signal data by the wireless equipment, controlling the timing of a transmission link of a radio frequency module of the wireless equipment and transmitting an obstacle detection signal by preset transmission power.
As an improvement of the above, the apparatus further comprises:
the judging module is used for judging whether the receiving power is larger than a preset safe power threshold value or not;
the second judging module is used for judging that the reflection of the obstacles around the wireless equipment to the signal transmitted by the wireless equipment can damage the radio frequency amplifier of the transmission link of the wireless equipment if the obstacles around the wireless equipment reflect the signal transmitted by the wireless equipment;
and the third judging module is used for judging that the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment does not influence the performance of the radio frequency amplifier of the transmission link of the wireless equipment if the wireless equipment does not reflect the signal transmitted by the wireless equipment.
As an improvement of the above scheme, the safe power threshold P _ safe is P _ max-P _ margin-Iso _ ant _ rx + LNA _ gain;
p _ max is the maximum power that the output end of the rf amplifier of the transmit chain of the wireless device can bear, P _ margin is a preset safety margin, Iso _ ANT _ Rx is the isolation between the ANT port and the Rx port of the rf switch when the rf switch of the receive chain is placed in the state where the Tx channel is open and the Rx channel is closed, and LNA _ gain is the signal gain of the low noise amplifier of the receive chain.
As an improvement of the above solution, the second determining module is further configured to:
if the radio frequency amplifier of the transmission link of the wireless equipment is judged to be damaged, the wireless equipment is controlled to stop signal transmission work, and a safety alarm prompt is sent out;
the third determination module is further configured to:
and if the radio frequency amplifier of the transmitting link of the wireless equipment is judged not to be damaged and the receiving power is judged to be larger than a preset slight risk power threshold value, controlling the wireless equipment to send out a slight risk alarm prompt.
As an improvement of the above scheme, if the wireless device has multiple antennas, the signal transmission control module is specifically configured to:
controlling each transmitting link of a radio frequency module of the wireless equipment to sequentially transmit the obstacle detection signal at preset transmitting power;
and the detection module is specifically configured to:
after controlling a transmitting link to transmit obstacle detection signals each time, detecting the receiving power of the obstacle detection signals which are not received for the first time of all receiving links of the radio frequency module;
and generating a power receiving matrix of the obstacle detection signals according to the received power of the obstacle detection signals which are not received for the first time of all the detected receiving links.
Referring to fig. 3, a schematic diagram of a wireless device according to an embodiment of the present invention is shown. The wireless device of this embodiment includes: a processor 1, a memory 2 and a computer program, such as an obstacle identification program, stored in said memory 2 and executable on said processor 1. The processor 1 implements the steps in the above-described respective obstacle identification method embodiments when executing the computer program. Alternatively, the processor 1 implements the functions of the modules/units in the above-mentioned device embodiments when executing the computer program.
Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program in the wireless device.
The wireless device may be a router or even a handset. The wireless device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the schematic diagram is merely an example of a wireless device and does not constitute a limitation of a wireless device, and may include more or fewer components than shown, or some components in combination, or different components, e.g., the wireless device may also include input-output devices, network access devices, buses, etc.
The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is the control center for the wireless device and that connects the various parts of the overall wireless device using various interfaces and lines.
The memory may be used to store the computer programs and/or modules, and the processor may implement various functions of the wireless device by executing or otherwise executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein the wireless device integrated module/unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
It should be noted that the above-described device embodiments are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. An obstacle identification method applied to a wireless device includes:
controlling a transmission link of a radio frequency module of the wireless equipment to transmit the obstacle detection signal at a preset transmission power;
detecting the receiving power of an obstacle detection signal received by a receiving link of the radio frequency module;
if the receiving power of any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0, judging that obstacles exist around the wireless equipment; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
2. The method for obstacle recognition according to claim 1, wherein the controlling a transmission link of a radio frequency module of the wireless device to transmit the obstacle detection signal at a predetermined transmission power comprises:
when the wireless equipment is started, controlling a transmitting link of a radio frequency module of the wireless equipment to transmit an obstacle detection signal at preset transmitting power;
or, comprising:
in the process of sending signal data by the wireless equipment, controlling the transmission link of the radio frequency module of the wireless equipment to transmit the obstacle detection signal at a preset transmission power at a fixed time.
3. The obstacle identification method according to claim 1, wherein after said determining that an obstacle exists around the wireless device, the method further comprises:
judging whether the receiving power is larger than a preset safe power threshold value or not;
if yes, judging that the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment can damage a radio frequency amplifier of a transmission link of the wireless equipment;
if not, the reflection of the signal transmitted by the wireless equipment by the obstacles around the wireless equipment is judged not to influence the performance of the radio frequency amplifier of the transmission link of the wireless equipment.
4. An obstacle identification method as set forth in claim 3, wherein said safe power threshold value P safe is P _ max-P _ margin-Iso _ ant _ rx + LNA _ gain;
p _ max is the maximum power that the output end of the rf amplifier of the transmit chain of the wireless device can bear, P _ margin is a preset safety margin, Iso _ ANT _ Rx is the isolation between the ANT port and the Rx port of the rf switch when the rf switch of the receive chain is placed in the state where the Tx channel is open and the Rx channel is closed, and LNA _ gain is the signal gain of the low noise amplifier of the receive chain.
5. The obstacle identification method according to claim 3, characterized in that the method further comprises:
if the radio frequency amplifier of the transmission link of the wireless equipment is judged to be damaged, the wireless equipment is controlled to stop signal transmission work, and a safety alarm prompt is sent out;
and if the radio frequency amplifier of the transmitting link of the wireless equipment is judged not to be damaged and the receiving power is judged to be larger than a preset slight risk power threshold value, controlling the wireless equipment to send out a slight risk alarm prompt.
6. The method for identifying obstacles according to claim 1, wherein the wireless device has a plurality of antennas, and the controlling the transmission link of the rf module of the wireless device to transmit the obstacle detection signal with a predetermined transmission power comprises:
controlling each transmitting link of a radio frequency module of the wireless equipment to sequentially transmit the obstacle detection signal at preset transmitting power;
the detecting the receiving power of the obstacle detection signal of the receiving link of the radio frequency module includes:
after controlling a transmitting link to transmit obstacle detection signals each time, detecting the receiving power of the obstacle detection signals which are not received for the first time of all receiving links of the radio frequency module;
generating a power receiving matrix of the obstacle detection signals according to the receiving power of the obstacle detection signals, which are not received for the first time, of all the receiving links, which are detected for each time;
if the receiving power of any receiving link of the radio frequency module, which receives a new obstacle detection signal after receiving an obstacle detection signal for the first time, is greater than 0, it is determined that an obstacle exists around the wireless device, including:
and if the received power in the power receiving matrix is greater than 0, judging that obstacles exist around the wireless equipment.
7. An obstacle recognition apparatus, applied to a wireless device, includes:
the signal transmission control module is used for controlling a transmission link of a radio frequency module of the wireless equipment to transmit the obstacle detection signal at preset transmission power;
the detection module is used for detecting the receiving power of the obstacle detection signal received by the receiving link of the radio frequency module;
a first determination module, configured to determine that an obstacle exists around the wireless device if a received power of a new obstacle detection signal received by any receiving link of the radio frequency module after receiving the obstacle detection signal for the first time is greater than 0; the received fault detection signal is a signal received by the receive chain after being coupled to the RX port through the ANT port of the rf switch of the receive chain.
8. An obstacle recognition apparatus according to claim 6, wherein said apparatus further comprises:
the judging module is used for judging whether the receiving power is larger than a preset safe power threshold value or not;
the second judging module is used for judging that the radio frequency amplifier of the wireless equipment transmitting link is damaged by the reflection of obstacles around the wireless equipment to the signal transmitted by the wireless equipment if the radio frequency amplifier is in the transmitting link;
and the third judging module is used for judging that the reflection of the obstacles around the wireless equipment on the signal transmitted by the wireless equipment can influence the performance of a radio frequency amplifier of a transmitting link of the wireless equipment if the obstacles around the wireless equipment do not reflect the signal transmitted by the wireless equipment.
9. A wireless device comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor implementing the obstacle identification method of any of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform the obstacle identification method according to any one of claims 1 to 6.
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