CN112470530A - Method and device for adjusting power density and storage medium - Google Patents

Method and device for adjusting power density and storage medium Download PDF

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Publication number
CN112470530A
CN112470530A CN201880095939.7A CN201880095939A CN112470530A CN 112470530 A CN112470530 A CN 112470530A CN 201880095939 A CN201880095939 A CN 201880095939A CN 112470530 A CN112470530 A CN 112470530A
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power
terminal device
power density
threshold value
transmission
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CN112470530B (en
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唐海
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • 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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method, equipment and storage medium for adjusting power density are provided, wherein the method applied to a terminal equipment side comprises the following steps: if the power density of the terminal device in the direction of the first beam exceeds a power density threshold value, and the first beam is a transmitting beam of the terminal device, detecting whether the terminal device is close to a preset target, and if the terminal device is close to the target and the direction of the first beam faces the target, adjusting the power density of the terminal device facing the target to be smaller than the power density threshold value. By the method, the power density of the terminal equipment towards the human body is adjusted not to exceed the specified threshold value, and the problem that the power density of the millimeter wave terminal equipment exceeds the standard is effectively avoided.

Description

Method and device for adjusting power density and storage medium Technical Field
The present disclosure relates to communications technologies, and in particular, to a method, a device, and a storage medium for adjusting power density.
Background
With the development of mobile communication technology, the development of low-frequency band spectrum resources is mature, and the remaining low-frequency band spectrum resources cannot meet the peak rate requirement of 10Gbit/s in the 5G era, so that the 5G system needs to find available spectrum resources on the millimeter wave frequency band in the future. Millimeter wave technology, which is one of the key 5G technologies, has become the focus of research and discussion of all parties in the current standards organization and industry chain.
For the millimeter wave terminal, in order to overcome the large propagation loss, a narrow transmission beam is generally adopted to concentrate energy to a direction facing a base station, which also causes the millimeter wave terminal to easily form stronger electromagnetic radiation energy in a certain direction, and in order to avoid the damage of the energy to human tissues, the international standard organization also sets corresponding standards to limit the radiation energy of the terminal in a certain direction for a long time when the terminal is close to a human body. The Power density is an index parameter for measuring the intensity of the electromagnetic radiation of the human body by the millimeter wave terminal, and has strict index requirements on the Power density value in the standard.
Therefore, how to effectively utilize the radiation power of the terminal to improve the uplink coverage while ensuring that the power density does not exceed the standard is a problem that needs to be solved at present.
Disclosure of Invention
The embodiment of the application provides a method, equipment and a storage medium for adjusting power density, so as to effectively avoid the problem that the power density of millimeter wave terminal equipment exceeds the standard.
In a first aspect, an embodiment of the present application may provide a method for adjusting power density, where the method is applied to a terminal device, and the method includes:
if the power density in the direction of a first wave beam of the terminal equipment exceeds a power density threshold value, detecting whether the terminal equipment is close to a target, wherein the first wave beam is a transmitting wave beam of the terminal equipment;
if the terminal equipment is close to the target and the direction of the first wave beam faces the target, adjusting the power density of the terminal equipment facing the target to be smaller than the power density threshold value.
In a second aspect, an embodiment of the present application may further provide a method for adjusting power density, where the method is applied to a network device, and the method includes:
if the power density of the terminal equipment exceeds a power density threshold value, determining whether the terminal equipment is allowed to reduce the transmission power by the maximum power back-off value according to the transmission power of the transmission beam of the terminal equipment and the pre-acquired maximum power back-off value;
if the terminal equipment is not allowed to reduce the transmission power by the maximum power back-off value, second indication information is sent to the terminal equipment;
wherein the second indication information is used for indicating the terminal device to perform beam switching.
In a third aspect, an embodiment of the present application may further provide a terminal device, including:
a detecting module, configured to detect whether a terminal device approaches a target if a power density in a direction of a first beam of the terminal device exceeds a power density threshold, where the first beam is a transmission beam of the terminal device;
and the processing module is used for adjusting the power density of the terminal equipment towards the target to be smaller than the power density threshold value if the terminal equipment is close to the target and the direction of the first beam is towards the target.
In a fourth aspect, an embodiment of the present application may further provide a network device, including:
a processing module, configured to determine whether to allow the terminal device to reduce the transmission power by a maximum power back-off value according to the transmission power of a transmission beam of the terminal device and a pre-obtained maximum power back-off value if the power density of the terminal device exceeds a power density threshold value;
a sending module, configured to send second indication information to the terminal device if the terminal device is not allowed to reduce the transmission power by the maximum power back-off value;
wherein the second indication information is used for indicating the terminal device to perform beam switching.
In a fifth aspect, an embodiment of the present application may further provide a terminal device, including:
a processor, a memory, an interface to communicate with a network device;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to cause the processor to perform the method of adjusting power density as provided by any one of the first aspects.
In a sixth aspect, an embodiment of the present application may further provide a network device, including:
a processor, a memory, an interface for communicating with a terminal device;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory to cause the processor to perform the method of adjusting power density as provided by any of the second aspects.
In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, the method for adjusting power density according to any one of the first aspect is implemented.
In an eighth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the method for adjusting the power density according to any one of the second aspect is implemented.
In a ninth aspect, an embodiment of the present application provides a program, which when executed by a processor, is configured to perform the method for adjusting power density according to any one of the first aspect.
In a tenth aspect, embodiments of the present application further provide a program, when executed by a processor, for executing the method for adjusting power density according to any one of the second aspect.
Alternatively, the processor may be a chip.
In an eleventh aspect, the present application provides a computer program product, which includes program instructions for implementing the method for adjusting power density according to any one of the first aspect.
In a twelfth aspect, an embodiment of the present application provides a computer program product, which includes program instructions for implementing the method for adjusting power density according to any one of the second aspect.
In a thirteenth aspect, an embodiment of the present application provides a chip, including: a processing module capable of performing the method of adjusting power density according to any one of the first aspect is interfaced with a communication device.
Further, the chip further includes a storage module (e.g., a memory) for storing instructions, the processing module is configured to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute the method for adjusting power density according to any one of the first aspect.
In a fourteenth aspect, an embodiment of the present application provides a chip, including: a processing module capable of performing the method of adjusting power density according to any one of the second aspect is interfaced with a communication device.
Further, the chip further includes a storage module (e.g., a memory) for storing instructions, the processing module is configured to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute the adjusting method of power density according to any one of the second aspect.
According to the method, the device and the storage medium for adjusting the power density, in the process of data interaction between the terminal device and the network device, if the power density in the direction of the first beam of the terminal device exceeds the power density threshold value and the first beam is the emission beam of the terminal device, whether the terminal device is close to a target is detected, if the terminal device is close to the target and the direction of the first beam faces the target, the power density of the terminal device facing the target is adjusted to be smaller than the power density threshold value, the power density of the terminal device facing a human body is adjusted to be smaller than the specified threshold value through the method, and the problem that the power density of the millimeter wave terminal device exceeds the standard is effectively avoided.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1a is a beam diagram of a millimeter wave terminal device provided in the present application;
fig. 1b is a schematic diagram of a relationship between a beam of a millimeter wave terminal device and a human body provided in the present application;
fig. 2 is a schematic diagram of a communication system to which an embodiment of the present application is applied;
FIG. 3 is a flow diagram of one particular implementation of determining whether a power density exceeds a power density threshold provided herein;
FIG. 4 is a flowchart illustrating a first embodiment of a method for adjusting power density according to the present disclosure;
fig. 5a is a flowchart of a second embodiment of a method for adjusting power density provided in the present application;
fig. 5b is a schematic diagram of transmit beam switching provided herein;
fig. 6 is a flowchart of a third embodiment of a method for adjusting power density provided in the present application;
fig. 7 is a schematic structural diagram of a first embodiment of a terminal device provided in the present application;
fig. 8 is a schematic structural diagram of a second terminal device according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a third embodiment of a terminal device provided in the present application;
fig. 10 is a schematic structural diagram of a fourth embodiment of a terminal device provided in the present application;
fig. 11 is a schematic structural diagram of a first network device according to an embodiment of the present application;
fig. 12 is a schematic structural diagram of a fifth embodiment of a terminal device provided in the present application;
fig. 13 is a schematic structural diagram of a second network device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The terms "first," "second," and the like in the description and in the claims, and in the drawings, of the embodiments of the application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The Power density (English full name: Power density) is an index parameter for measuring the intensity of the millimeter wave terminal to the electromagnetic radiation of the human body, and the unit of the Power density is as follows: w/m2. The power density test generally takes the average power value of the terminal equipment in a unit area in a certain direction in a period of time as an index, the higher the transmitting power of the terminal equipment is, the narrower the beam is, and the higher the uplink transmitting time ratio is, the higher the power density value is. However, in millimeter wave terminals, in order to overcome propagation loss, a narrow transmission beam is generally used to concentrate energy in the direction of the network device, the beam is narrow, and the energy of electromagnetic radiation is concentrated if the transmission beam is oriented towards the network deviceHuman body, and easily cause injury to human tissue when power density is higher.
Fig. 1a is a beam diagram of a millimeter wave terminal device provided in the present application; fig. 1b is a schematic diagram of a relationship between a beam of a millimeter wave terminal device and a human body provided in the present application. As shown in fig. 1a, a terminal device, surrounding beams and directions of the beams are shown in the figure, and the number of the beams is not limited in this scheme, which is only illustrated schematically, and with reference to fig. 1b, it can be known that when a user uses the terminal device, the number of the beams that can be selected by the terminal device is large, but there is a large number of beams that are directed toward a human body in the direction of a part of the beams, and if the transmission power of the beams and/or the uplink transmission duration are high at this time, it is possible to cause that the power density directed toward the human body exceeds a specified threshold value, which may cause damage to human tissues. The mode of this scheme can also be used in the millimeter wave and adjust power density when causing the influence to other targets, and this target can be animal, plant, other electronic equipment etc. to every target different power density threshold of all can prescribing, all can adopt the technical scheme that this scheme provided to adjust, does not do the restriction to this scheme.
The following describes a method for adjusting the power density provided in the present application.
Fig. 2 is a schematic diagram of a communication system applied in the embodiment of the present application. As shown in fig. 2, the communication system includes at least a network device 11 and a terminal device 12. It is understood that in an actual communication system, there may be one or more network devices 11 and terminal devices 12, and fig. 2 is only one example.
In fig. 2, the network device 11 may be an access device in a cellular network, for example, an access device in an LTE network and an evolved network thereof, such as an evolved Node B (eNB or eNodeB), or a relay station, or a base station in a new network system in the future, and the coverage area of the access device is illustrated as a solid circled area. Or may be an Access Point (AP) in the WLAN.
Terminal Equipment 12, which may also be referred to as a mobile terminal, User Equipment (UE), access terminal, subscriber unit, subscriber station, mobile station, User terminal, wireless communication device, User agent, or User device. Specifically, the device may be a smart phone, a cellular phone, a cordless phone, a Personal Digital Assistant (PDA) device, a handheld device with a wireless communication function or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, or the like. In an embodiment of the application, the terminal device has an interface for communicating with a network device (e.g., a cellular network).
The method for adjusting the power density comprises the following steps: the terminal device needs to detect whether the power density in the direction of the currently used transmit beam exceeds a power density threshold (also referred to as a threshold) specified in the standard. If the power density in the direction of the currently used transmission beam exceeds the power density threshold value, whether the terminal device is close to the target or not and whether the direction of the transmission beam faces the target or not need to be detected, and if the terminal device is determined to be close to the target and the direction of the transmission beam faces the target, the power density facing the target direction needs to be reduced, namely the power density is adjusted and reduced to be below the specified power density threshold value.
In the implementation of this scheme, it is first determined whether the power density of the terminal device exceeds a power density threshold, and as can be seen from the meaning of the power density, the factors that affect the power density at least include: the method comprises the following steps that several factors are involved in the transmission power, the beam width is narrow, and the uplink transmission time length is more than several factors, in order to improve uplink coverage, the millimeter wave terminal equipment generally adopts a narrow transmission beam to transmit, so that the factors influencing the power density at least comprise the following factors: the transmission power and the uplink transmission time length are in proportion. Therefore, the terminal device needs to determine whether the power density exceeds the power density threshold value: and determining whether the power density in the direction of the transmitting beam exceeds a power density threshold value or not according to the transmitting power of the currently used transmitting beam and/or the uplink transmitting time length ratio of the transmitting beam in a preset window time length.
The meaning of this scheme includes: the terminal device may determine whether the power density exceeds the power density threshold value according to at least one of the transmission power of the transmission beam and the uplink transmission duration ratio. That is, there is a possibility that the transmission power does not exceed the specified transmission power threshold, but the uplink transmission duration is large, so that the power density exceeds the power density threshold. There is also a possibility that the uplink transmission duration ratio does not exceed the specified maximum uplink ratio value, but the power density exceeds the power density threshold value due to too much transmission power. The ratio of the transmission power and the uplink transmission time length is also possible to exceed the upper limit, and the scheme is not limited.
When it is determined that the power density of the terminal device exceeds the power threshold value, and it is detected that the terminal device is close to the target and the transmission beam faces the target, the power density can be reduced to the specified power density threshold value at least according to the following modes provided by the present application:
the first method is as follows: the transmit power of the transmit beam is reduced to less than a transmit power threshold.
The second method comprises the following steps: a beam not directed towards the target is selected as the transmit beam.
And in the third mode, after the transmission power of the transmission beam is reduced, the beam which does not face the target is switched to be used as the transmission beam.
Taking the target as a human body as an example, the following describes a specific implementation of the terminal device determining that the power density exceeds the threshold of the power density and reducing the power density below the specified threshold of the power density through several embodiments.
Fig. 3 is a flowchart of an implementation of determining whether the power density exceeds the power density threshold, where as shown in fig. 3, if the terminal device currently selects the first beam for transmission, that is, the first beam currently used, the specific implementation step of the terminal device determining whether the power density exceeds the power density threshold includes:
s101: the transmit power of the first beam is detected.
In this scheme, the higher the transmission power of the terminal device is, the higher the uplink transmission duration ratio is, the higher the power density value is, therefore, to detect whether the power density of the terminal device exceeds the standard, the transmission power of the current first beam and the uplink transmission duration ratio need to be detected.
In this step, the terminal device needs to detect the currently used first beam, and obtain the current transmission power of the first beam, so as to compare with a specified transmission power threshold value, and determine whether the transmission power exceeds the transmission power threshold value.
S102: and if the transmitting power of the first wave beam exceeds a transmitting power threshold value, detecting and acquiring the uplink transmitting time length ratio in the window time length.
In this step, if the transmission power of the first beam does not exceed the transmission power threshold, in this scheme, it may be considered that the power density of the terminal device does not exceed the power density threshold, and no subsequent processing is performed. If the transmission power of the first beam exceeds the transmission power threshold, the uplink transmission time length ratio needs to be continuously detected, the uplink transmission time length ratio refers to the time proportion of uplink transmission time length, namely, the uplink transmission time length ratio is related to time, and the whole time length cannot be detected, so that a period of time can be selected for detection, for example, the window time length of the uplink transmission time length ratio can be detected in advance in a protocol, or the window time length is directly stored in the terminal equipment, the window time length is read when the uplink transmission time length ratio needs to be detected, and the uplink transmission time length ratio of the first beam is detected and obtained in the window time length.
S103: and if the uplink transmission time length ratio exceeds the uplink transmission time length ratio threshold value, determining that the power density in the direction of the first wave beam exceeds the power density threshold value.
In this step, the uplink transmission duration ratio obtained by the detection is compared with the uplink transmission duration ratio threshold value obtained in advance, and if the uplink transmission duration ratio does not exceed the uplink transmission duration ratio threshold value, it can be considered that the power density does not exceed the power density threshold value, and no processing can be performed. And if the uplink transmission time length ratio exceeds the uplink transmission time length ratio threshold value, determining that the power density in the first beam direction exceeds the power density threshold value.
Optionally, in a specific implementation of the present solution, as to whether to detect the transmission power first or detect the uplink transmission time ratio first, the present solution is not limited, and the terminal device may also detect and obtain the uplink transmission time ratio within the window time; if the uplink transmission time length occupation ratio exceeds the uplink transmission time length occupation ratio threshold value, detecting the transmission power of the first wave beam; determining that the power density in the direction of the first beam exceeds a power density threshold if the transmit power of the first beam exceeds a transmit power threshold.
In the above scheme, the transmission beam of the terminal device is an uplink beam, and two parameters, that is, the transmission power threshold and the uplink transmission time ratio threshold, are involved in the process of determining whether the power density of the terminal device in the direction of the transmission beam exceeds the power density threshold. The two parameters need to be tested during the production process of the terminal device or before the terminal device leaves the factory, and the two parameters can be written in the protocol of the terminal device or stored in the terminal device in advance. The following describes a test mode of the transmission power threshold and the uplink transmission time occupying ratio threshold.
(1) Threshold value of transmission power
And the transmission power threshold of any beam is the maximum transmission power of which the power density does not exceed the power density threshold value when the beam faces a target and the full uplink time slot is adopted for transmission. In the scheme, in order to obtain a transmission power threshold, when any beam faces a human body (i.e., faces a target, which may be other types of targets), a full uplink time slot is used for transmission (meaning that all time slots are used for uplink transmission and no downlink transmission is performed), different transmission powers are converted for transmission, power density in a beam direction is calculated, and the maximum transmission power of which the power density does not exceed the power density threshold is used as a transmission power threshold corresponding to the beam and can be represented by XdBm.
(2) Uplink transmission time ratio threshold value
The uplink transmission time length ratio threshold value of any beam is the maximum uplink transmission time length ratio value of which the power density does not exceed the power density threshold value when the beam faces a target and is transmitted with the maximum transmission power. Similar to the above scheme, when the terminal device selects a transmission beam, when any beam faces the human body and is transmitted with the maximum transmission power, different uplink transmission time length ratios are adjusted, power density in the beam direction corresponding to the glance sideways uplink transmission time length ratio is calculated, and then the maximum uplink transmission time length ratio value with the power density not exceeding the power density threshold value is used as an uplink transmission time length ratio threshold value and can be represented by maxuldtycycle. In this scheme, it should be understood that the uplink transmission time length occupation threshold value may have different values for different frequency bands.
The transmission power threshold value corresponding to each beam of the terminal device and the uplink transmission duration ratio threshold value can be obtained according to the scheme.
Optionally, when the terminal device initially accesses the network, the terminal device may report the transmission power threshold and/or the uplink transmission duration ratio threshold corresponding to each beam to the network device, and the network device may schedule resources for the terminal device by referring to the uplink transmission duration ratio threshold, so as to avoid a problem that the power density is too high due to too high uplink transmission duration ratio.
Based on the above scheme, several specific implementations of adjusting the power density are described below by taking a human body as an example.
Fig. 4 is a flowchart of a first embodiment of a method for adjusting power density, as shown in fig. 4, the method for adjusting power density specifically includes the following steps:
s201: and if the power density in the direction of a first wave beam of the terminal equipment exceeds a power density threshold value, detecting whether the terminal equipment is close to a human body, wherein the first wave beam is a transmitting wave beam of the terminal equipment.
In this step, the terminal device has already determined, according to any of the foregoing manners, that the power density in the currently used first beam direction exceeds the prescribed power density threshold value, and if the terminal device is farther away from the human body, even if the power density in a certain direction is higher, the human tissue will not be affected, so it is necessary to determine whether the terminal device is close to the human body. Specifically, the distance between the terminal device and the human body can be detected, whether the distance is smaller than a certain preset distance or not can be determined, the preset distance can be obtained according to an experiment, and the record is stored so as to be used when needed, which is not limited to this. In addition, the distance between the terminal device and the human body can be monitored in real time, whether the terminal device gradually approaches to the human body or not is determined, and if the terminal device gradually approaches to the human body along with the time, the terminal device is determined to approach to the human body.
In a specific implementation manner of this step, the terminal device may detect a relative position relationship between the terminal device and the human body according to a built-in sensor, and determine whether the terminal device is close to the human body according to the relative position relationship.
Further, the terminal device may also determine whether the direction of the first beam (i.e., the currently used transmission beam) is toward the human body, based on the relative positional relationship and the direction of the first beam. Since the direction of the beam is known to the terminal device, the terminal device can determine whether the transmit beam is directed towards the human body by knowing the relative position of the human body to it.
In the scheme, a sensor built in the terminal device comprises at least one of a distance sensor, a touch sensor, a gyroscope and the like, and can detect the relative position relationship between the terminal device and the human body, so that whether the terminal device works in a state of being close to the human body can be determined, and the approaching in the scheme at least comprises the following conditions: the distance between the terminal device and the human body is smaller than a certain preset distance, or the distance between the terminal device and the human body is gradually reduced within a period of time, and the like. This can be done in the same way if other types of objects are involved.
S202: and if the terminal equipment is close to the human body and the direction of the first wave beam faces the human body, reducing the transmitting power of the first wave beam to be smaller than the transmitting power threshold value.
In this step, it is determined that the terminal device is close to the human body according to the above-mentioned manner, and the direction of the first beam faces the human body, which is easy to damage human tissue.
Specifically, a scheme for reducing the power density is provided in this scheme, that is, the terminal device may reduce the transmission power of the first beam to be smaller than the transmission power threshold value, so as to ensure that the power density toward the human body is smaller than the power density threshold value.
In a specific implementation of the scheme, the ways for the terminal device to reduce the transmission power at least include the following two ways:
in the first way, the terminal device gradually decreases the transmission power of the first beam until the transmission power is below the threshold value. Optionally, the power density may be calculated during this process, and it is determined that the power density also falls below the threshold value.
In a second mode, the terminal device obtains a maximum power back-off value corresponding to the first beam, and directly reduces the transmission power of the first beam by the maximum power back-off value. That is, when it is determined that the transmission power needs to be reduced to be lower than the transmission power threshold value, the terminal device may directly subtract the maximum power back-off value from the current transmission power to obtain the reduced transmission power, and then transmit with the reduced transmission power.
In this scheme, the maximum power back-off value (MPR may be used)RFexposureExpressed) is that when the actual uplink transmission time length ratio of the terminal equipment scheduled by the network exceeds the uplink transmission time length ratio threshold value reported to the network equipment by the terminal equipment, the maximum power back-off value applicable to the terminal equipment, namely the maximum reducible power value of the terminal equipment, and the terminal equipmentThe end device may obtain the maximum power back-off value by calculating according to the transmission power threshold value and the maximum power value that may be transmitted. It should be understood that the maximum power back-off value has corresponding values for different frequency bands, which can be obtained through experiments and stored in the terminal device, and when the terminal device initially accesses the network, the maximum power back-off value needs to be reported to the network device, that is, the maximum power back-off value is sent to the network device. The network equipment can judge whether the terminal equipment is allowed to carry out power backoff or not based on the maximum power backoff value reported by the terminal equipment.
It should be understood that this processing method requires the terminal device to report to the network the maximum power back-off value MPR required by each Beam (english: Beam) when initially accessing the networkRFexposureSo that the network device can subsequently determine whether the transmission power can be allowed to be reduced by the maximum power reduction value MPRRFexposure。
In the method for adjusting power density provided by this embodiment, after the terminal device determines that the power density exceeds the power density threshold, the state of the terminal device is detected, and if the terminal device is close to the human body and the direction of the first beam faces the human body, the terminal device may adjust the power density to be below the power density threshold by reducing the transmission power of the first beam, so as to avoid electromagnetic waves from damaging human tissues, and ensure that the power density does not exceed the standard while the uplink coverage rate is improved by using the narrowband beam.
Fig. 5a is a flowchart of a second embodiment of a method for adjusting power density provided in the present application, and as shown in fig. 5, the method for adjusting power density provided in the present implementation specifically includes the following steps:
s301: and if the power density in the direction of the first beam currently used by the terminal equipment exceeds a power density threshold value, detecting whether the terminal equipment is close to the human body.
This step is similar to step S201 in the embodiment shown in fig. 4, and the implementation manner thereof can refer to the explanation of step S201, which is not described herein again.
S302: if the terminal device is close to the human body and the direction of the first beam faces the human body, the transmitting beam of the terminal device is adjusted to be a second beam, and the direction of the second beam does not face the human body.
In this step, similarly to the above embodiment, it is determined that the terminal device is close to the human body, and at the same time, the direction of the first beam faces the human body, which is likely to cause damage to human tissue.
Specifically, a scheme for reducing the power density is provided in the present scheme, that is, the terminal device may switch the transmission beam, and the transmission beam is switched to another beam not facing the human body, so as to avoid the electromagnetic wave from damaging the human body, so that the terminal device needs to select the second beam from the other beam not facing the human body, and subsequently can switch to the second beam for transmission, thereby reducing the power density in the direction facing the user. The method for the terminal device to select the second beam at least comprises:
in the first mode, the second beam is a beam determined according to the received signal quality corresponding to a beam other than a beam directed toward the human body. That is, the terminal device may select the second beam according to the received signal quality of each beam except for the beam directed toward the human body, may select the beam with the best received signal quality, may also select the beam with the second best received quality, or other beams, which is not limited in this scheme.
In a specific implementation of the solution, the terminal device may adopt a plurality of beams other than the beam whose direction faces the human body to transmit in turn, and receive the quality of the received signal corresponding to each beam of the plurality of beams returned by the network device. Then, a beam having the best received signal quality is selected as the second beam from the plurality of beams other than the beam directed toward the human body, based on the received signal quality corresponding to each beam.
As shown in fig. 1b, it can be known that, in all the selectable beams of the terminal device, there may be a plurality of beams that are directed toward the human body, and therefore, it is first necessary to determine which beams are not directed toward the human body according to the direction of each beam and the relative position relationship between the terminal device and the human body. Then, the plurality of beams which do not face the human body are used for transmitting in turn, namely, interaction is carried out between the plurality of beams and the network equipment, the network equipment receives signals transmitted by each beam of the terminal equipment, meanwhile, the quality of received signals when each beam is transmitted can be detected, and the network equipment can directly select a second beam with the best quality of the received signals from the plurality of beams according to the quality of the received signals corresponding to each beam and feed the second beam back to the terminal equipment. In general, the second beam is selected by the terminal device itself, so the network device can also send the received signal quality corresponding to each beam to the terminal device. That is, the terminal device receives the received signal quality of each beam which is not directed to the human body and fed back by the network device, and then selects the beam with the best received signal quality as the second beam.
Second, the second beam is a beam randomly selected from a plurality of beams other than the direction toward the target. That is, the terminal device may randomly select one beam as the second beam from a plurality of beams other than the beam directed toward the human body.
In the scheme, similarly, the terminal device determines which beams are not directed towards the human body according to the direction of each beam and the relative position relationship between the terminal device and the human body. And then randomly selecting one of the plurality of beams which are not directed to the human body as a second beam.
In this step, the terminal device switches the transmission beam to the second beam selected according to the above scheme, and fig. 5b is a schematic diagram of switching the transmission beam provided by the present application, as shown in fig. 5b, in this scheme, the transmission beam before switching is directed toward the human body, and the transmission beam after switching is not directed toward the human body, so that the power density in the direction toward the human body is reduced, and the electromagnetic wave is prevented from damaging the human tissue.
In a specific implementation of the scheme, since the terminal device has confirmed that the power density exceeds the power density threshold value, the terminal device is close to the human body and the beam direction is toward the human body, in order to further reduce the harm of the electromagnetic wave to the human body, the transmission power may be reduced by some amount before switching the beam. I.e. the transmission power of the first beam is reduced to be less than the transmission power threshold value before the second beam is selected. The manner of reducing the transmit power is similar to the embodiment shown in fig. 2.
Reducing the transmitting power of the first beam before selecting the second beam can further avoid the harm of electromagnetic waves to human tissues in the processes of selecting the second beam and switching the beams.
In the method for adjusting power density provided by this embodiment, after the terminal device determines that the power density exceeds the power density threshold, the state of the terminal device is detected, and if the terminal device is close to the human body and the direction of the first beam faces the human body, the terminal device may adjust the power density to be below the power density threshold by switching to a mode of transmitting beams that do not face the human body, and further may further reduce power first and then switch beams, so as to reduce the time of electromagnetic waves radiating the human body as much as possible, further avoid the electromagnetic waves from causing damage to human tissues, and ensure that the power density does not exceed the standard.
In the specific implementation of the embodiments shown in fig. 4 and fig. 5a, both the schemes that the terminal device reduces the power of the transmission beam are involved, in a specific implementation of the schemes, whether the transmission power can directly reduce the maximum power back-off value or not may be determined by the terminal device through negotiation with the network device, fig. 6 is a flowchart of a third embodiment of the adjustment method for the power density provided by the present application, as shown in fig. 6, the present embodiment provides a scheme that reduces the power or switches beams through negotiation between the terminal device and the network device, and specifically includes the following steps:
s401: and if the power density of the terminal equipment exceeds a power density threshold value, determining whether the terminal equipment is allowed to reduce the transmission power by the maximum power back-off value according to the transmission power of the transmission beam of the terminal equipment and the pre-acquired maximum power back-off value.
In this step, the network device first needs to determine that the power density of the terminal device exceeds the power density threshold, specifically, there are the following two ways:
in the first mode, the terminal device reports the information.
Specifically, when detecting that the power density in the transmission beam direction exceeds the threshold, the terminal device sends first indication information to the network device, where the first indication information is used to indicate that the power density of the transmission beam of the terminal device (i.e., the first beam in the foregoing terminal device-side embodiment) exceeds the power density threshold. For the network device, first indication information sent by the terminal device is received, and it is determined that the power density of the terminal device exceeds a threshold value of the power density according to the first indication information.
In the second way, the detection calculation is performed by the network device.
Specifically, the network device calculates and obtains the power density of the terminal device according to the ratio of the transmission power of the first beam used by the terminal device to the uplink transmission time configured for the terminal device. And then comparing the calculated power density with a power density threshold value to determine whether the power density exceeds the power density threshold value.
In a specific implementation of the scheme, in an initial network access process, the terminal device needs to send a maximum power back-off value to the network device. The network device judges that the terminal device is allowed to directly reduce the transmission power by the maximum power back-off value, the reduced transmission power is determined to be lower than the required minimum transmission power, and the transmission power is too low to easily cause the problem of receiving failure or even disconnection, so the reduction cannot be carried out at will, and therefore the specific implementation of the step is as follows: if the network device judges that the difference value between the transmitting power of the first wave beam and the maximum power back-off value is smaller than the pre-acquired minimum power value, the terminal device is not allowed to reduce the transmitting power by the maximum power back-off value; otherwise, the terminal device is allowed to reduce the transmission power by the maximum power back-off value, and the specific transmission power reduction method is similar to that in the embodiment shown in fig. 2 and is not described herein again.
S402: and if the terminal equipment is not allowed to reduce the transmission power by the maximum power back-off value, sending second indication information to the terminal equipment, wherein the second indication information is used for indicating the terminal equipment to carry out beam switching.
In this step, if the network device determines that the terminal device is not allowed to reduce the transmission power by the maximum power back-off value, the beam may also be switched in order to solve the problem of the reduction of the power density of the terminal device towards the human body, so the network device may instruct the terminal device to perform beam switching, that is, send the second indication information to the terminal device, and for the terminal device, receive the second indication information sent by the network device, and then switch the transmission beam from the current first beam to the second beam according to the scheme in the foregoing embodiment.
In the implementation of this scheme, if the second beam is selected by the network device for the terminal device according to the received signal quality of each beam or other parameters, the second indication information may further include the second beam selected by the network device or identification information of the second beam, which is not limited in this scheme.
In the method for adjusting power density provided by this embodiment, after determining that the power density exceeds a power density threshold, the terminal device detects a state of the terminal device, and if the terminal device is close to a human body and the direction of the first beam faces the human body, and the terminal device can reduce the transmission power by a maximum power back-off value, it needs to negotiate with the network device to determine, and if the maximum power back-off value cannot be reduced, the problem of too high power density can be solved by switching beams, so as to avoid the problem that the network device cannot receive signals and the terminal device drops off due to too much reduction of the transmission power, and at the same time, the power density can be adjusted to be below the power density threshold, so as to avoid electromagnetic waves from damaging human tissues, and ensure that the power density.
Fig. 7 is a schematic structural diagram of a first embodiment of a terminal device provided in the present application, and as shown in fig. 7, the terminal device 100 includes:
a detecting module 111, configured to detect whether a terminal device approaches a target if a power density in a direction of a first beam of the terminal device exceeds a power density threshold, where the first beam is a transmission beam of the terminal device;
the processing module 112 is configured to adjust the power density of the terminal device towards the target to be less than the power density threshold value if the terminal device is close to the target and the direction of the first beam is towards the target.
The terminal device provided by this embodiment is used for executing the technical scheme on the terminal device side in any of the foregoing method embodiments, and the implementation principle and technical effect are similar, and the problem that the power density of the millimeter wave terminal device exceeds the standard is effectively avoided by adjusting the power density of the terminal device toward the target to be not more than the specified threshold.
On the basis of the embodiment shown in fig. 7, the processing module 112 is further configured to:
and determining whether the power density in the direction of the first beam exceeds the power density threshold value according to the transmission power of the first beam and/or the uplink transmission time length ratio of the first beam in a preset window time length.
Further, the processing module 112 is specifically configured to:
detecting a transmit power of the first beam;
if the transmitting power of the first wave beam exceeds the transmitting power threshold value, detecting and acquiring the uplink transmitting time occupation ratio in the window time;
if the uplink transmission time length ratio exceeds the uplink transmission time length ratio threshold value, determining that the power density in the direction of the first beam exceeds the power density threshold value;
or,
detecting and acquiring the uplink transmission time ratio in the window time;
if the uplink transmission time length occupation ratio exceeds the uplink transmission time length occupation ratio threshold value, detecting the transmission power of the first wave beam;
determining that the power density in the direction of the first beam exceeds a power density threshold if the transmit power of the first beam exceeds a transmit power threshold.
On the basis of any of the foregoing embodiments, in a specific implementation manner, the processing module 112 is specifically configured to:
reducing the transmit power of the first beam to less than the transmit power threshold.
Optionally, the processing module 112 is specifically configured to:
and adjusting the transmitting beam of the terminal equipment to be the second beam, wherein the direction of the second beam is not towards a target.
The terminal device provided by any implementation manner is configured to execute the technical solution on the terminal device side in any method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again. A
Optionally, the second beam is a beam determined according to the received signal quality corresponding to a beam other than a beam directed toward the target.
Fig. 8 is a schematic structural diagram of a second embodiment of a terminal device provided in the present application, and as shown in fig. 8, the terminal device 100 further includes:
a transmitting module 113, configured to transmit in turn using a plurality of beams other than the beam directed toward the target;
a receiving module 114, configured to receive a received signal quality corresponding to each of the multiple beams returned by the network device;
the processing module 112 is further configured to select a beam with the best received signal quality from the plurality of beams except for the beam directed toward the target as the second beam according to the received signal quality corresponding to each beam.
On the basis of any of the above embodiments, the second beam is a beam randomly selected from a plurality of beams other than a direction toward the target.
Optionally, the processing module 112 is specifically configured to:
randomly selecting one beam from a plurality of beams other than a direction toward a target as the second beam.
Optionally, the processing module 112 is further configured to reduce the transmission power of the first beam to be smaller than the transmission power threshold before selecting the second beam.
Optionally, the processing module 112 is specifically configured to:
obtaining a maximum power back-off value corresponding to the first wave beam;
reducing the transmit power of the first beam by the maximum power back-off value.
The terminal device provided by any implementation manner is configured to execute the technical solution on the terminal device side in any method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 9 is a schematic structural diagram of a third embodiment of a terminal device provided in the present application, and as shown in fig. 9, the terminal device 100 further includes:
a sending module 115, configured to send the maximum power back-off value to a network device during an initial network access procedure.
Optionally, before the processing module 112 adjusts the transmission beam of the terminal device to the second beam, the sending module 115 is further configured to send first indication information to the network device, where the first indication information is used to indicate that the power density of the first beam exceeds the power density threshold;
optionally, the terminal device further includes: a receiving module 114, configured to receive second indication information sent by the network device; the second indication information is used for indicating the terminal equipment to perform beam switching.
Optionally, the sending module 115 is configured to report the uplink transmission duration ratio threshold value of each beam in the window duration to the network device.
Optionally, on the basis of any of the above embodiments, when the transmission power threshold of any beam is the maximum transmission power of the beam when the beam faces the target and the full uplink timeslot is adopted for transmission, the power density does not exceed the power density threshold.
Optionally, the processing module 112 is further configured to:
and when any beam faces a target, transmitting by adopting a full uplink time slot, and taking the maximum transmission power of which the power density does not exceed the power density threshold as the transmission power threshold corresponding to the beam.
Optionally, the uplink transmission duration ratio threshold of any beam is a maximum uplink transmission duration ratio value at which the power density does not exceed the power density threshold when the beam faces the target and is transmitted with the maximum transmission power.
Optionally, the processing module 112 is further configured to:
and when any beam faces a target and is transmitted with the maximum transmission power, taking the maximum uplink transmission ratio value of which the power density does not exceed the power density threshold value as an uplink transmission time length ratio threshold value.
Fig. 10 is a schematic structural diagram of a fourth embodiment of a terminal device provided in the present application, and as shown in fig. 10, the terminal device 100 further includes:
the storage module 116 is configured to store a transmission power threshold and an uplink transmission duration ratio threshold corresponding to each beam.
On the basis of any of the foregoing embodiments, the detection module 111 is specifically configured to:
detecting the relative position relation between the terminal equipment and a target according to a sensor arranged in the terminal equipment, and determining whether the terminal equipment is close to the target or not according to the relative position relation.
Further, the processing module 112 is further configured to determine whether the direction of the first beam is toward the target according to the relative position relationship and the direction of the first beam.
Optionally, the target comprises a human body.
The terminal device provided by any implementation manner is configured to execute the technical solution on the terminal device side in any method embodiment, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 11 is a schematic structural diagram of a first embodiment of a network device provided in the present application, and as shown in fig. 11, the network device 200 includes:
a processing module 211, configured to determine, if the power density of the terminal device exceeds a power density threshold, whether to allow the terminal device to reduce the transmission power by a maximum power back-off value according to the transmission power of the transmission beam of the terminal device and a pre-obtained maximum power back-off value;
a sending module 212, configured to send second indication information to the terminal device if the terminal device is not allowed to reduce the transmission power by the maximum power back-off value;
wherein the second indication information is used for indicating the terminal device to perform beam switching.
Optionally, the processing module 211 is specifically configured to:
if the difference between the transmission power of the transmission beam and the maximum power back-off value is smaller than the pre-obtained minimum power value, not allowing the terminal device to reduce the transmission power by the maximum power back-off value;
otherwise, allowing the terminal device to reduce the transmission power by the maximum power back-off value.
Optionally, the network device 200 further includes:
a receiving module 213, configured to receive first indication information sent by the terminal device, where the first indication information is used to indicate that a power density of a transmission beam of the terminal device exceeds the power density threshold;
or,
the processing module 211 is specifically configured to:
acquiring the power density of the terminal equipment according to the ratio of the transmitting power of the first wave beam to the uplink transmitting time length configured for the terminal equipment;
determining whether the power density exceeds the power density threshold value.
The network device provided in this embodiment is configured to execute the technical solution on the network device side in any of the foregoing method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 12 is a schematic structural diagram of a fifth embodiment of a terminal device provided in the present application, and as shown in fig. 12, the terminal device 300 includes:
a processor 311, a memory 312, an interface 313 to communicate with a network device;
the memory 312 stores computer-executable instructions;
the processor 311 executes the computer execution instruction stored in the memory, so that the processor 311 executes the technical solution of any one of the foregoing method embodiments on the terminal device side.
Fig. 12 is a simple design of a terminal device, the number of processors and memories in the terminal device is not limited in the embodiments of the present application, and fig. 12 only illustrates the number as 1 as an example.
Fig. 13 is a schematic structural diagram of a second embodiment of a network device provided in the present application, and as shown in fig. 13, the network device 400 includes:
a processor 411, a memory 412, an interface 413 for communicating with a terminal device;
the memory 412 stores computer-executable instructions;
the processor 411 executes the computer execution instruction stored in the memory 412, so that the processor 411 executes the technical solution of the network device side in any of the foregoing method embodiments.
Fig. 13 is a simple design of a network device, and the number of processors and memories in the network device is not limited in the embodiments of the present application, and fig. 13 only illustrates the number as 1 as an example.
In one specific implementation of the terminal device shown in fig. 12 and the network device shown in fig. 13, the memory, the processor, and the interface may be connected through a bus, and optionally, the memory may be integrated inside the processor.
The embodiment of the present application further provides a computer-readable storage medium, where computer-executable instructions are stored in the computer-readable storage medium, and when the computer-executable instructions are executed by a processor, the computer-executable instructions are used to implement the technical solution of the terminal device in any one of the foregoing method embodiments.
The embodiment of the present application further provides a computer-readable storage medium, where a computer executing instruction is stored in the computer-readable storage medium, and when the computer executing instruction is executed by a processor, the computer executing instruction is used to implement a technical solution of a network device in any one of the foregoing method embodiments.
The embodiment of the present application further provides a program, and when the program is executed by a processor, the program is configured to execute the technical solution of the terminal device in any one of the foregoing method embodiments.
The embodiment of the present application further provides a program, and when the program is executed by a processor, the program is configured to execute the technical solution of the network device in any of the foregoing method embodiments.
Alternatively, the processor may be a chip.
The embodiment of the present application further provides a computer program product, which includes program instructions, where the program instructions are used to implement the technical solution of the terminal device in any one of the foregoing method embodiments.
The embodiment of the present application further provides a computer program product, which includes program instructions, where the program instructions are used to implement the technical solution of the network device in any of the foregoing method embodiments.
An embodiment of the present application further provides a chip, including: the processing module and the communication interface, the processing module can execute the technical scheme of the terminal device side in any one of the method embodiments.
Further, the chip further includes a storage module (e.g., a memory), where the storage module is configured to store instructions, and the processing module is configured to execute the instructions stored by the storage module, and the execution of the instructions stored in the storage module causes the processing module to execute the technical solution on the terminal device side in any of the foregoing method embodiments.
An embodiment of the present application further provides a chip, including: and the processing module and the communication interface can execute the technical scheme of the network equipment side in any one of the method embodiments.
Further, the chip further includes a storage module (e.g., a memory), where the storage module is configured to store an instruction, and the processing module is configured to execute the instruction stored by the storage module, and the execution of the instruction stored in the storage module causes the processing module to execute the technical solution on the network device side in any of the foregoing method embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules is only one logical division, and other divisions may be realized in practice, for example, a plurality of modules may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, and the indirect coupling or communication connection of the modules may be in an electrical, mechanical or other form.
In the above Specific implementation of the terminal device and the network device, it should be understood that the Processor may be a Central Processing Unit (CPU), other general purpose processors, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor, or in a combination of the hardware and software modules in the processor.
All or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The aforementioned program may be stored in a readable memory. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape, floppy disk, optical disk, and any combination thereof.

Claims (48)

  1. A method for adjusting power density is applied to a terminal device, and the method comprises the following steps:
    if the power density in the direction of a first beam of the terminal equipment exceeds a power density threshold value, detecting whether the terminal equipment is close to a target, wherein the first beam is a transmitting beam of the terminal equipment;
    if the terminal equipment is close to the target and the direction of the first wave beam faces the target, adjusting the power density of the terminal equipment facing the target to be smaller than the power density threshold value.
  2. The method of claim 1, further comprising:
    and determining whether the power density in the direction of the first beam exceeds the power density threshold value according to the transmission power of the first beam and/or the uplink transmission time length ratio of the first beam in a preset window time length.
  3. The method of claim 2, wherein said determining whether the power density in the direction of the first beam exceeds the power density threshold according to the transmit power of the first beam and a ratio of an uplink transmit duration of the first beam within a preset window duration comprises:
    detecting a transmit power of the first beam;
    if the transmitting power of the first wave beam exceeds a transmitting power threshold value, detecting and acquiring the uplink transmitting time occupation ratio in the window time;
    if the uplink transmission time length ratio exceeds the uplink transmission time length ratio threshold value, determining that the power density in the direction of the first beam exceeds the power density threshold value;
    or,
    detecting and acquiring the uplink transmission time ratio in the window time;
    if the uplink transmission time length occupation ratio exceeds the uplink transmission time length occupation ratio threshold value, detecting the transmission power of the first wave beam;
    determining that the power density in the direction of the first beam exceeds a power density threshold if the transmit power of the first beam exceeds a transmit power threshold.
  4. The method according to any one of claims 1 to 3, wherein the adjusting the power density of the terminal device towards the target to be less than a power density threshold value comprises:
    reducing the transmit power of the first beam to less than the transmit power threshold.
  5. The method according to any one of claims 1 to 3, wherein the adjusting the power density of the terminal device towards the target to be less than a power density threshold value comprises:
    adjusting a transmission beam of the terminal device to the second beam; wherein the direction of the second beam is not towards a target.
  6. The method of claim 5, further comprising:
    the second beam is a beam determined according to the received signal quality corresponding to a beam other than a beam directed toward the target.
  7. The method of claim 5, further comprising:
    the second beam is a beam randomly selected from a plurality of beams other than a direction toward a target.
  8. The method of claim 5, wherein prior to the adjusting the transmit beam of the terminal device to the second beam, the method further comprises:
    reducing the transmit power of the first beam to less than the transmit power threshold.
  9. The method of claim 4 or 8, wherein the reducing the transmission power of the first beam to be less than the transmission power threshold value comprises:
    obtaining a maximum power back-off value corresponding to the first wave beam;
    reducing the transmit power of the first beam by the maximum power back-off value.
  10. The method of claim 9, further comprising:
    and in the process of initially accessing the network, sending the maximum power back-off value to network equipment.
  11. The method of claim 10, wherein prior to the adjusting the transmit beam of the terminal device to the second beam, the method further comprises:
    and sending first indication information to the network equipment, wherein the first indication information is used for indicating that the power density of the first beam exceeds the power density threshold value.
  12. The method according to claim 10 or 11, characterized in that the method further comprises:
    receiving second indication information sent by the network equipment; the second indication information is used for indicating the terminal equipment to perform beam switching.
  13. The method according to any of claims 2 to 12, wherein before adjusting the power density of the terminal device to be less than a power density threshold value, the method further comprises:
    and reporting the uplink transmission time ratio threshold value of each beam in the window time to the network equipment.
  14. The method according to any one of claims 2 to 13,
    and the transmission power threshold of any beam is the maximum transmission power of which the power density does not exceed the power density threshold value when the beam faces a target and the full uplink time slot is adopted for transmission.
  15. The method of claim 14,
    the uplink transmission time length ratio threshold value of any beam is the maximum uplink transmission time length ratio value of which the power density does not exceed the power density threshold value when the beam faces a target and is transmitted with the maximum transmission power.
  16. The method of claim 15, further comprising:
    and storing a transmission power threshold value and an uplink transmission time ratio threshold value corresponding to each beam.
  17. The method according to any one of claims 1 to 16, wherein the detecting whether the terminal device is close to the target comprises:
    detecting the relative position relation between the terminal equipment and the target according to a built-in sensor, and determining whether the terminal equipment is close to the target or not according to the relative position relation.
  18. The method of claim 17, further comprising:
    and determining whether the direction of the first beam faces a target or not according to the relative position relation and the direction of the first beam.
  19. The method of any one of claims 1 to 18, wherein the target comprises a human body.
  20. A method for adjusting power density, applied to a network device, the method comprising:
    if the power density of the terminal equipment exceeds a power density threshold value, determining whether the terminal equipment is allowed to reduce the transmission power by the maximum power back-off value according to the transmission power of the transmission beam of the terminal equipment and the pre-acquired maximum power back-off value;
    if the terminal equipment is not allowed to reduce the transmission power by the maximum power back-off value, second indication information is sent to the terminal equipment;
    wherein the second indication information is used for indicating the terminal device to perform beam switching.
  21. The method of claim 20, wherein the determining whether to allow the terminal device to reduce the transmission power by the maximum power back-off value according to the transmission power of the transmission beam of the terminal device and a pre-obtained maximum power back-off value comprises:
    if the difference between the transmission power of the transmission beam and the maximum power back-off value is smaller than the pre-obtained minimum power value, not allowing the terminal device to reduce the transmission power by the maximum power back-off value;
    otherwise, allowing the terminal device to reduce the transmission power by the maximum power back-off value.
  22. The method according to claim 20 or 21, further comprising:
    receiving first indication information sent by the terminal device, wherein the first indication information is used for indicating that the power density of a transmission beam of the terminal device exceeds the power density threshold value;
    or,
    acquiring the power density of the terminal equipment according to the ratio of the transmitting power of the transmitting wave beam to the uplink transmitting time length configured for the terminal equipment;
    determining whether the power density exceeds the power density threshold value.
  23. A terminal device, comprising:
    a detecting module, configured to detect whether a terminal device approaches a target if a power density in a direction of a first beam of the terminal device exceeds a power density threshold, where the first beam is a transmission beam of the terminal device;
    and the processing module is used for adjusting the power density of the terminal equipment towards the target to be smaller than the power density threshold value if the terminal equipment is close to the target and the direction of the first beam is towards the target.
  24. The terminal device of claim 23, wherein the processing module is further configured to:
    and determining whether the power density in the direction of the first beam exceeds the power density threshold value according to the transmission power of the first beam and/or the uplink transmission time length ratio of the first beam in a preset window time length.
  25. The terminal device of claim 24, wherein the processing module is specifically configured to:
    detecting a transmit power of the first beam;
    if the transmitting power of the first wave beam exceeds the transmitting power threshold value, detecting and acquiring the uplink transmitting time occupation ratio in the window time;
    if the uplink transmission time length ratio exceeds the uplink transmission time length ratio threshold value, determining that the power density in the direction of the first beam exceeds the power density threshold value;
    or,
    detecting and acquiring the uplink transmission time ratio in the window time;
    if the uplink transmission time length occupation ratio exceeds the uplink transmission time length occupation ratio threshold value, detecting the transmission power of the first wave beam;
    determining that the power density in the direction of the first beam exceeds a power density threshold if the transmit power of the first beam exceeds a transmit power threshold.
  26. The terminal device according to any one of claims 23 to 25, wherein the processing module is specifically configured to:
    reducing the transmit power of the first beam to less than the transmit power threshold.
  27. The terminal device according to any one of claims 23 to 25, wherein the processing module is specifically configured to:
    adjusting a transmission beam of the terminal device to the second beam; wherein the direction of the second beam is not towards a target.
  28. The terminal device of claim 27, wherein the terminal device further comprises:
    the second beam is a beam determined according to the received signal quality corresponding to a beam other than a beam directed toward the target.
  29. The terminal device of claim 27, wherein the second beam is a beam randomly selected from a plurality of beams other than directionally toward a target.
  30. The terminal device of claim 27, wherein the processing module is further configured to reduce the transmit power of the first beam to less than the transmit power threshold before adjusting the transmit beam of the terminal device to the second beam.
  31. The terminal device according to claim 26 or 30, wherein the processing module is specifically configured to:
    obtaining a maximum power back-off value corresponding to the first wave beam;
    reducing the transmit power of the first beam by the maximum power back-off value.
  32. The terminal device of claim 31, wherein the terminal device further comprises:
    and the sending module is used for sending the maximum power back-off value to network equipment in the process of initially accessing the network.
  33. The terminal device of claim 32, wherein before the processing module adjusts the transmission beam of the terminal device to the second beam, the sending module is further configured to send first indication information to the network device, where the first indication information is used to indicate that the power density of the first beam exceeds the power density threshold value.
  34. The terminal device according to claim 32 or 33, wherein the terminal device further comprises:
    the receiving module is used for receiving second indication information sent by the network equipment; the second indication information is used for indicating the terminal equipment to perform beam switching.
  35. The terminal device according to any of claims 24 to 34, wherein the terminal device further comprises:
    and the sending module is used for reporting the uplink transmission time length ratio threshold value of each beam in the window time length to the network equipment.
  36. The terminal device according to any of claims 24 to 35,
    and the transmission power threshold of any beam is the maximum transmission power of which the power density does not exceed the power density threshold value when the beam faces a target and the full uplink time slot is adopted for transmission.
  37. The terminal device of claim 36,
    the uplink transmission time length ratio threshold value of any beam is the maximum uplink transmission time length ratio value of which the power density does not exceed the power density threshold value when the beam faces a target and is transmitted with the maximum transmission power.
  38. The terminal device of claim 37, wherein the terminal device further comprises:
    and the storage module is used for storing the transmitting power threshold value and the uplink transmitting time ratio threshold value corresponding to each beam.
  39. The terminal device according to any one of claims 23 to 38, wherein the detecting module is specifically configured to:
    detecting the relative position relation between the terminal equipment and a target according to a sensor arranged in the terminal equipment, and determining whether the terminal equipment is close to the target or not according to the relative position relation.
  40. The terminal device of claim 39, wherein the processing module is further configured to:
    and determining whether the direction of the first beam faces a target or not according to the relative position relation and the direction of the first beam.
  41. A terminal device according to any of claims 23 to 40, wherein the object comprises a human body.
  42. A network device, comprising:
    a processing module, configured to determine whether to allow the terminal device to reduce the transmission power by a maximum power back-off value according to the transmission power of a transmission beam of the terminal device and a pre-obtained maximum power back-off value if the power density of the terminal device exceeds a power density threshold value;
    a sending module, configured to send second indication information to the terminal device if the terminal device is not allowed to reduce the transmission power by the maximum power back-off value;
    wherein the second indication information is used for indicating the terminal device to perform beam switching.
  43. The network device of claim 42, wherein the processing module is specifically configured to:
    if the difference between the transmission power of the transmission beam and the maximum power back-off value is smaller than the pre-obtained minimum power value, not allowing the terminal device to reduce the transmission power by the maximum power back-off value;
    otherwise, allowing the terminal device to reduce the transmission power by the maximum power back-off value.
  44. The network device of claim 42 or 43, wherein the network device further comprises:
    a receiving module, configured to receive first indication information sent by the terminal device, where the first indication information is used to indicate that a power density of a transmission beam of the terminal device exceeds the power density threshold;
    or,
    the processing module is specifically configured to:
    acquiring the power density of the terminal equipment according to the ratio of the transmitting power of the first wave beam to the uplink transmitting time length configured for the terminal equipment;
    determining whether the power density exceeds the power density threshold value.
  45. A terminal device, comprising:
    a processor, a memory, an interface to communicate with a network device;
    the memory stores computer-executable instructions;
    the processor executes computer-executable instructions stored in the memory to cause the processor to perform the method of adjusting power density of any one of claims 1 to 19.
  46. A network device, comprising:
    a processor, a memory, an interface for communicating with a terminal device;
    the memory stores computer-executable instructions;
    the processor executes computer-executable instructions stored in the memory to cause the processor to perform the method of adjusting power density of any one of claims 20 to 22.
  47. A computer-readable storage medium, wherein computer-executable instructions are stored in the computer-readable storage medium, and when executed by a processor, the computer-executable instructions are used for implementing the method for adjusting power density according to any one of claims 1 to 19.
  48. A computer-readable storage medium, having stored thereon computer-executable instructions for implementing the method of adjusting power density according to any one of claims 20 to 22 when executed by a processor.
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