CN109151977B - Power control method and device and computer readable storage medium - Google Patents
Power control method and device and computer readable storage medium Download PDFInfo
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- CN109151977B CN109151977B CN201810746157.7A CN201810746157A CN109151977B CN 109151977 B CN109151977 B CN 109151977B CN 201810746157 A CN201810746157 A CN 201810746157A CN 109151977 B CN109151977 B CN 109151977B
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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
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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Abstract
A power control method and apparatus, and a computer-readable storage medium. The power control method comprises the following steps: acquiring direction information of a base station relative to a terminal; determining power output to an antenna of the terminal at least according to the direction information; outputting the power to the antenna. According to the scheme provided by the embodiment, the power output to the antenna is determined according to the direction information, the output power of the antenna can be better controlled, and the power adjustment efficiency is improved.
Description
Technical Field
The embodiment of the invention relates to a power control method and device, and a computer readable storage medium.
Background
After receiving the desired Power transmitted by the base station, the terminal adjusts the conducted Power transmitted by a Power Amplifier (PA) to the antenna of the terminal according to the desired Power, so that the radiation Power of the antenna reaches the desired Power. However, the conducted power sent by the PA to the antenna is not actually the power actually radiated by the antenna, so when the conducted power is changed according to the desired power and then the radiated power is changed, the terminal needs to perform multiple adjustments to make the output of the antenna reach the desired power, which is not efficient.
Disclosure of Invention
At least one embodiment of the present invention provides a power control method and apparatus, and a computer-readable storage medium, which improve power control efficiency.
At least one embodiment of the present invention provides a power control method, including:
acquiring direction information of a base station relative to a terminal;
determining power output to an antenna of the terminal at least according to the direction information;
outputting the power to the antenna.
At least one embodiment of the present invention provides a power control apparatus, including a memory and a processor, where the memory stores a program, and the program, when read and executed by the processor, implements the power control method according to any one of the embodiments.
At least one embodiment of the present invention provides a computer-readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the power control method of any of the embodiments.
Compared with the related art, in at least one embodiment of the present invention, the direction information of the base station relative to the terminal is obtained, the power output to the antenna of the terminal is determined according to the direction information, and the power is output to the antenna. In this embodiment, the output power is determined according to the direction information, and because the radiation efficiency of the antenna is different when the directions are different, the radiation power of the antenna can be accurately controlled by determining the PA output power according to the direction information.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flowchart of a power control method according to an embodiment of the present invention;
fig. 2 is a diagram of an antenna pattern when PA output powers of terminals are the same in the related art;
fig. 3 is a directional diagram of an antenna after a terminal adjusts PA output power according to an embodiment of the present invention;
fig. 4 is a block diagram of a power control apparatus according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
When The power output from The PA to The antenna port on The board is a certain value, The OTA (Over The Air, wireless) darkroom test (analog far field test) is performed, The received power at different positions is different on a spherical surface with The terminal as The center, and The ratio of The received power at each position to The power output from The PA to The antenna port is The radiation efficiency of The terminal. The radiation efficiency of the terminal in different directions is different, and the radiation efficiency and the spatial position (direction information) have a one-to-one correspondence relationship. When the terminal antenna is determined, namely the wiring form and the grounding mode are determined, and the whole machine is assembled, the characteristic (radiation efficiency) of the terminal to space radiation signals is determined. The communication between the base station and the terminal belongs to far field communication, and the direction information of the base station relative to the terminal has a one-to-one correspondence relationship with the radiation efficiency, so that the power output from the PA to the antenna can be controlled according to the direction information, and the power adjustment efficiency is improved.
As shown in fig. 1, an embodiment of the present invention provides a power adjustment method, including:
and 103, outputting the power to the antenna.
In this embodiment, the power output to the antenna is determined according to the direction information of the base station relative to the terminal, and since the direction information and the radiation efficiency have a corresponding relationship, the power determined according to the direction information and output to the antenna of the terminal can more effectively reach the target power required to be output by the antenna, and the power adjustment efficiency is improved.
In one embodiment, in step 101, the direction information of the base station relative to the terminal is the direction information of the base station relative to the terminal with the terminal as the center. The direction information of the base station relative to the terminal can be obtained from a common channel in which the base station and the terminal interact. Of course, the direction information may be obtained from other manners, which is not limited in the present application.
In an embodiment, in step 102, the determining, according to at least the direction information, power output to an antenna of the terminal includes:
and determining the radiation efficiency of the antenna of the terminal in the direction according to the direction information, and determining the power output to the antenna according to the target power required to be output by the antenna and the radiation efficiency. Wherein the target power is the power output to the antenna. Compared with the related art, the power output from the PA to the antenna is directly used as the power radiated by the antenna for power adjustment.
In an embodiment, the target power is an expected power that is issued by the base station to the terminal and is required to be radiated by the terminal. The desired power is delivered to the terminal, such as over a broadcast channel. Of course, the present application is not limited thereto, and the target power may also be a power value preset by the terminal. In the related art, when signal fluctuation occurs, the base station feeds back an instruction for increasing the transmission power to the terminal. The conducted power of the terminal mainboard is radiated by the antenna, the power sent by the PA at each time is different through the conversion of the antenna, the times of repeatedly adjusting the power by the terminal are increased, and the power consumption is increased. In the embodiment, the power is adjusted according to the radiation efficiency of the antenna, so that the interaction efficiency is improved, the interaction times are reduced, and the power consumption is reduced.
In one embodiment, the radiation efficiency of the antenna of the terminal in this direction is determined according to the following manner:
and searching a pre-established corresponding relation table of the antenna radiation efficiency and the direction, and determining the radiation efficiency of the antenna of the terminal in the direction.
In an embodiment, the correspondence table between the radiation efficiency and the direction is determined according to the following manner:
outputting a fixed power to the antenna of the terminal, obtaining the radiation power of the antenna in different directions, determining the radiation efficiency in different directions according to the radiation power in different directions and the fixed power, and establishing a corresponding relation table of the radiation efficiency and the direction.
The corresponding relation table of the radiation efficiency and the direction can be obtained by testing an antenna directional diagram. When the power output from PA to antenna port is determined, the power is output from OThe TA test results in an antenna pattern, which is shown in fig. 2, and it can be seen that in some directions the signal emitted by the antenna is strong, in some directions the signal is weak, and the pattern is an irregular spherical pattern, which shows a three-dimensional perspective view, which can be represented in polar coordinates, with parameters (α, theta) representing the directions of the three-dimensional space, α, theta representing the angles to the x-axis, y-axis and z-axis, respectively, [ η ]1....ηn]Represents the radiation efficiency, P, of the antenna corresponding to different directionspRepresenting the conducted power output by the rf PA on the motherboard to the antenna port. The power in each direction actually tested is P1,...Pn. Due to the anisotropy of the radiation efficiency, the radiation power of the antenna is different at each position (i.e., each direction) in space under the condition that the conduction power of the main board is a constant value. Expressed in functional form as:
ηi＝f(α,β,θ),i＝1...n (2)
after the antenna trace pattern is determined, ηiI.e. a fixed value. As can be seen from equation (1), the power values measured in different directions vary with the radiation efficiency of the antenna. Wherein, PpAt the time of fixation, P1....PnCan be measured and η can be determined1....ηn. Thus, a correspondence table of radiation efficiency and direction can be established.
Known as η1....ηnThen, if necessary, let P1....PnSimilarly, the power output to the antenna in different directions can be obtained by reverse estimation, and when the power corresponding to each direction is output to the antenna, the output power of the antenna is the same, and the directional pattern at this time is as shown in fig. 3.
In an embodiment, the radiation efficiency of the antenna of the terminal in the direction is: and the radiation efficiency of the antenna of the terminal in the direction under the current frequency band. It should be noted that the current frequency band refers to a current frequency band of the terminal in the current system. The current frequency band refers to the current operating frequency band of the terminal. Since radiation efficiency may be different in different systems and different frequency bands, the radiation efficiency needs to be obtained according to the system and the frequency band. When an OTA test is carried out to obtain an antenna directional diagram, the test is carried out by a parting system and a frequency band, corresponding relation tables of radiation efficiency and direction are respectively established by the parting system and the frequency band, and one corresponding relation table exists under one system and one frequency band. The standard is, for example, WCDMA (Wideband Code Division Multiple Access), CDMA (Code Division Multiple Access), LTE (long term Evolution), GSM (Global System for Mobile Communication), and the like.
At present, the antenna and the main board are basically separated in the early stage of terminal development. The debugging target of the motherboard is to achieve the conducted transmit and receive targets, usually relying on cable calibration. When the transmitting power reaches the maximum expected power and all transmitting indexes are normal, the maximum transmitting power of the main board is determined, and the transmitting power cannot be exceeded in the using process of the terminal. The antenna is equivalent to an impedance transformation structure and does not relate to the conduction characteristic of a single plate. The independent research and development process cannot fully utilize the potential performance of the antenna and the main board, and the terminal cannot achieve the optimal performance. When the antenna performance is poor, the mainboard conduction index meets the communication requirement, and the margin is sufficient, but normal communication may not be possible, because the maximum transmission power of the mainboard is determined in the debugging stage, and cannot be modified. In the coupling test process of the whole machine, a special phenomenon can occur, the transmitting power of a terminal at a certain position is normal, but the receiving sensitivity is insufficient, and after the test position is replaced, the receiving sensitivity index is normal and the transmitting power is insufficient. The transmission and receiving indexes of the mainboard under the cable reach the standard, and the OTA test indexes are normal. The source of the problem is that the motherboard and the antenna do not work in concert. In an embodiment, parameters in the antenna test process are mined to adjust the transmitting power of the terminal, so that the main board and the antenna work cooperatively, and the overall operation efficiency of the terminal is improved. Specifically, in an embodiment, the maximum transmission power of the terminal is determined according to the radiation efficiency of the antenna.
In an embodiment, the determining the maximum transmission power of the terminal according to the radiation efficiency of the antenna includes:
for any frequency band, determining first power, wherein the first power meets the following requirements: when the first power is output to the antenna, the transmission parameter in the direction with the minimum radiation efficiency of the antenna meets the transmission parameter requirement, and the first power is used as the maximum transmission power (i.e., the power output to the antenna) of the terminal in the frequency band. Compared with the prior art, the maximum transmitting power is irrelevant to the antenna performance, and the conditions that the performance of the main board reaches the standard, the performance of the antenna reaches the standard and the coupling performance of the whole machine does not meet the requirement can occur. In the embodiment, the maximum transmitting power of the terminal is determined together with the antenna in a cooperative manner, the radiation efficiency of the antenna is considered, and the performance of the terminal can be more accurately reflected. In addition, compared with the scheme of setting the maximum transmission power without considering the antenna performance in the related art, the scheme of the embodiment can reduce the maximum transmission power under the condition that the antenna performance of some frequency bands is better (the radiation efficiency is high), and further reduce the power consumption.
After the radio frequency part of the terminal main board is matched and debugged, the single board cable calibration is needed. After calibration, the transmission power without signalling will have a larger range. The maximum transmit power is higher than the maximum transmit power of the terminal during actual operation, and table 1 below is calibration part data of a certain LTE (Long Term Evolution) frequency band, which shows that the maximum transmit power of a terminal board can reach 29 dBm. The maximum output power of LTE is usually limited to 22.5dBm with NV (Nonvolatile, radio frequency parameters stored in non-volatile memory) configuration.
And after the terminal antenna is debugged, assembling into a complete machine to carry out OTA test. The main radiation performance parameters of the antenna are mainly divided into two types: receive parameters and transmit parameters. The transmission parameter is TRP (Total Radiated Power), and the reception parameter is TIS (Total Isotropic Sensitivity). The TRP reflects the radiation power condition of the whole terminal, and is related to the transmission power and the antenna radiation performance of the terminal under the conduction condition. In the related art, when a parameter test of an antenna is performed, power transmitted to the antenna is fixed, and in the application, it is considered to change the power transmitted to the antenna.
For example, when the conducted power of a certain LTE B5(B5 represents a B5 band) is 22.5dBm, the values of ACLR (adjacent channel Leakage Ratio) are all below-42, and there are many margins for EVM (Error vector magnitude) and power margin, so that even when the power is raised to 24.5dBm, the transmission index can also meet the 3GPP requirements. In different directions, different powers [ P ] are inputp1.......Ppn]And the output power of the antenna in different directions is consistent, and the radiation power of the terminal becomes isotropic. Assuming that the conducted index can satisfy the requirement unconditionally, the TRP of the terminal can reach the expected value at all angles.
TABLE 1 terminal Transmission Power
In addition, the antenna radiation efficiency can also be applied to the optimal design of the antenna. In the design process of the antenna, the performance of a certain frequency band is poor, the value of TRP cannot meet the requirement, the power input to the antenna needs to be increased, if the PA is replaced by a high-power amplifier, the cost is increased, and at the moment, the wiring space of the antenna with different frequency bands can be adjusted. In an embodiment, if the radiation efficiency is the highest in a certain frequency band, the wiring space of the frequency band is reduced during antenna design, and the wiring space is increased for the frequency band with low radiation efficiency, so that the condition that the PA is replaced by a high-power amplifier is avoided. It should be noted that, after the wiring space is adjusted, the radiation efficiency of the antenna under each frequency band is changed, and whether the antenna can meet the requirement needs to be retested. The above adjustment process may occur multiple times until the terminal requirements are met.
As shown in fig. 4, an embodiment of the present invention provides a power control apparatus 40, which includes a memory 410 and a processor 420, where the memory 410 stores a program, and when the program is read and executed by the processor 420, the program performs the following operations: acquiring direction information of a base station relative to a terminal; determining power output to an antenna of the terminal at least according to the direction information; outputting the power to the antenna.
In other embodiments, when being read and executed by the processor 420, the program further implements the power control method according to any of the above embodiments.
An embodiment of the present invention provides a computer-readable storage medium storing one or more programs which, when executed by one or more processors, implement the power control method of any of the above embodiments.
The computer-readable storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A method of power control, comprising:
acquiring direction information of a base station relative to a terminal;
determining power output to an antenna of the terminal based at least on the direction information, comprising:
determining the radiation efficiency of the antenna of the terminal in the direction according to the direction information, and determining the power output to the antenna according to the target power required to be output by the antenna and the radiation efficiency;
outputting the power to the antenna;
the target power is the expected power which is issued to the terminal by the base station and is required to be radiated by the terminal.
2. The power control method of claim 1, wherein the radiation efficiency of the antenna of the terminal in the direction is determined according to the following:
and searching a pre-established corresponding relation table of the radiation efficiency and the direction, and determining the radiation efficiency of the antenna of the terminal in the direction.
3. The power control method according to claim 2, wherein the correspondence table of radiation efficiency and direction is determined as follows:
outputting a fixed power to the antenna of the terminal, obtaining the radiation power of the antenna in different directions, determining the radiation efficiency in different directions according to the radiation power in different directions and the fixed power, and establishing a corresponding relation table of the radiation efficiency and the direction.
4. The power control method according to claim 2, wherein the radiation efficiency of the antenna of the terminal in the direction is: and the radiation efficiency of the antenna of the terminal in the direction under the current frequency band.
5. The power control method of claim 1, further comprising: and determining the maximum transmitting power of the terminal according to the radiation efficiency of the antenna.
6. The power control method of claim 5, wherein the determining the maximum transmission power of the terminal according to the radiation efficiency of the antenna comprises:
for any frequency band, determining first power, wherein the first power meets the following requirements: and when the first power is output to the antenna, the transmission parameter of the direction with the minimum radiation efficiency of the antenna meets the transmission parameter requirement, and the first power is taken as the maximum transmission power of the terminal under the frequency band.
7. A power control apparatus comprising a memory and a processor, the memory storing a program which, when read and executed by the processor, implements the power control method according to any one of claims 1 to 6.
8. A computer readable storage medium storing one or more programs, the one or more programs being executable by one or more processors to implement the power control method according to any one of claims 1 to 6.
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| CN201810746157.7A CN109151977B (en) | 2018-07-09 | 2018-07-09 | Power control method and device and computer readable storage medium |
| PCT/CN2019/094257 WO2020011049A1 (en) | 2018-07-09 | 2019-07-01 | Power control method and device, and computer-readable storage medium |
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| CN201810746157.7A CN109151977B (en) | 2018-07-09 | 2018-07-09 | Power control method and device and computer readable storage medium |
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| CN109151977B true CN109151977B (en) | 2020-09-04 |
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| CN109151977B (en) * | 2018-07-09 | 2020-09-04 | 南京中兴软件有限责任公司 | Power control method and device and computer readable storage medium |
| CN114375031B (en) * | 2021-12-23 | 2024-04-30 | 中国电信股份有限公司 | Method, base station and medium for controlling signal strength |
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| CN109151977B (en) * | 2018-07-09 | 2020-09-04 | 南京中兴软件有限责任公司 | Power control method and device and computer readable storage medium |
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| CN1148834C (en) * | 1997-05-28 | 2004-05-05 | 法国电信局 | Communication method between base station with N antennae and mobile phone and base for implementing same |
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| CN109151977A (en) | 2019-01-04 |
| WO2020011049A1 (en) | 2020-01-16 |
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