CN110720201A - Output power adjusting method and related product - Google Patents

Output power adjusting method and related product Download PDF

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Publication number
CN110720201A
CN110720201A CN201880037241.XA CN201880037241A CN110720201A CN 110720201 A CN110720201 A CN 110720201A CN 201880037241 A CN201880037241 A CN 201880037241A CN 110720201 A CN110720201 A CN 110720201A
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China
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terminal
power
predistortion
actual
broadcast message
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CN201880037241.XA
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Chinese (zh)
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CN110720201B (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
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems

Abstract

The embodiment of the application discloses an output power adjusting method and a related product, comprising the following steps: the terminal receives a system broadcast message from the network equipment, determines the actual transmitting power required by the terminal, and is in an idle state currently; and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion. According to the embodiment of the application, the dynamic period performance calibration of the terminal transmitting path is realized through the dynamic interaction between the terminal and the network, so that the PA predistortion can be dynamically applied to the millimeter wave terminal, and the uplink transmitting power is improved.

Description

Output power adjusting method and related product Technical Field
The present application relates to the field of communications technologies, and in particular, to an output power adjustment method and a related product.
Background
The network-residing state of the terminal in the network comprises an idle state and a connection state, and in the idle state, if the terminal is at the edge of a cell, the terminal has a requirement on high transmitting power, so as to ensure that the terminal can initiate random access at any time to obtain network service.
The performance of a Power Amplifier (PA) of a millimeter wave terminal is greatly affected by external environment and thermal noise of the terminal, so that the PA linearization improvement technology of a low frequency band, such as predistortion, cannot be directly applied, and the millimeter wave terminal has low linear transmitting Power and limited uplink coverage.
Disclosure of Invention
Embodiments of the present application provide an output power adjustment method and a related product, which implement dynamic period performance calibration of a terminal transmission path through dynamic interaction between a terminal and a network, so that PA predistortion can be dynamically applied to a millimeter wave terminal, and uplink transmission power is improved.
In a first aspect, an embodiment of the present application provides an output power adjustment method, which is applied to a terminal, and the method includes:
receiving a system broadcast message from network equipment, and determining the actual transmitting power required by the terminal, wherein the terminal is in an idle state currently;
and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion.
In a second aspect, an embodiment of the present application provides an output power adjustment method, which is applied to a network device, and the method includes:
sending a system broadcast message to a terminal, wherein the system broadcast message is used for determining the actual transmitting power required by the terminal in an idle state at present, the required actual transmitting power is used for the terminal to start a self-calibration process of a Power Amplifier (PA), so as to obtain a pre-distortion calibration file, the pre-distortion calibration file is used for determining the high transmitting power after pre-distortion, and the required actual transmitting power is greater than the preset transmitting power.
In a third aspect, an embodiment of the present application provides a terminal, where the terminal has a function of implementing a behavior of the terminal in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the terminal includes a processor configured to enable the terminal to perform the corresponding functions of the above-described method. Further, the terminal may further include a transceiver for supporting communication between the terminal and the network device. Further, the terminal may also include a memory, coupled to the processor, that retains program instructions and data necessary for the terminal.
In a fourth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing a behavior of a first network device in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the network device includes a processor configured to support the network device to perform the corresponding functions of the above-described method. Further, the network device may further include a transceiver for supporting communication between the network device and the terminal. Further, the network device may also include a memory for coupling with the processor that retains program instructions and data necessary for the network device.
In a fifth aspect, embodiments of the present application provide a network device, including a processor, a memory, a transceiver, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps of any of the methods of the first aspect of the embodiments of the present application.
In a sixth aspect, embodiments of the present application provide a terminal, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps of any of the methods of the second aspect of the embodiments of the present application.
In a seventh aspect, this application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps as described in any one of the methods of the first aspect of this application.
In an eighth aspect, the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in any one of the methods in the second aspect of the present application.
In a ninth aspect, the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
In a tenth aspect, the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in any one of the methods of the second aspect of the embodiments of the present application. The computer program product may be a software installation package.
It can be seen that, in the embodiment of the present application, when the terminal is in an idle state, the terminal first receives a system broadcast message from the network device, determines a required actual transmit power, and then, when it is detected that the required actual transmit power is greater than a preset transmit power, starts a self-calibration process of the power amplifier PA to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmit power after predistortion. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
Drawings
Reference will now be made in brief to the drawings that are needed in describing embodiments or prior art.
Fig. 1A is a network architecture diagram of a possible communication system provided by an embodiment of the present application;
FIG. 1B is a signal composition diagram of an SSB provided in an embodiment of the present application;
fig. 2 is a schematic flowchart of an output power adjustment method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of an output power adjustment method according to an embodiment of the present application;
fig. 4 is a schematic flowchart of an output power adjustment method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a network device according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.
By way of example, fig. 1A illustrates a wireless communication system to which the present application relates. The wireless communication system 100 may operate in a high frequency band, and is not limited to a Long Term Evolution (LTE) system, but may also be a future-Evolution fifth-Generation mobile communication (5 th Generation, 5G) system, a new air interface (NR) system, a Machine-to-Machine communication (M2M) system, and the like. The wireless communication system 100 may include: one or more network devices 101, one or more terminals 103, and a core network device 105. Wherein: the network device 101 may be a base station, and the base station may be configured to communicate with one or more terminals, and may also be configured to communicate with one or more base stations having partial terminal functions (such as a macro base station and a micro base station). The Base Station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, an evolved Node B (eNB) in an LTE system, and a Base Station in a 5G system or a new air interface (NR) system. In addition, the base station may also be an Access Point (AP), a transmission node (Trans TRP), a Central Unit (CU), or other network entity, and may include some or all of the functions of the above network entities. The core network device 105 includes Access and Mobility Management Function (AMF) entities, a User Plane Function (UPF) entity, and a Session Management Function (SMF) on the core network side. The terminals 103 may be distributed throughout the wireless communication system 100 and may be stationary or mobile. In some embodiments of the present application, the terminal 103 may be a mobile device (e.g., a smart phone), a mobile station (mobile station), a mobile unit (mobile unit), an M2M terminal, a wireless unit, a remote unit, a user agent, a mobile client, and so forth.
It should be noted that the wireless communication system 100 shown in fig. 1A is only for more clearly illustrating the technical solution of the present application, and does not constitute a limitation to the present application, and as a person having ordinary skill in the art knows, the technical solution provided in the present application is also applicable to similar technical problems as the network architecture evolves and new service scenarios emerge.
The related art to which the present application relates is described below.
Predistortion is a common low frequency PA calibration approach, and the basic predistortion structure is shown in fig. 1B. The low-frequency PA has stable characteristics and basically does not change greatly along with external factors, so that a predistortion calibration file of the PA is generally obtained in a laboratory through measurement in a terminal production design stage, and is written into a terminal storage unit and directly called in actual use of a user, so that the linearity is improved, and the output power is improved.
Assuming that the gain function of the predistorter is D (f, a) and the gain function of the PA is H (f, a), the overall gain function can be expressed by the following equation:
h (f, A): d (f, a) x P (f, a) ═ constant C
But the situation is different for the mm wave terminals. Due to the high frequency band of the millimeter wave PA, the PA gain function H (f, a) changes greatly with external thermal noise, phase noise, interference signals, temperature, etc., so that the static predistortion scheme used at the low frequency band cannot be directly applied to the millimeter wave terminal, and how to dynamically adjust the predistortion algorithm to adapt to the change of the PA performance needs to be studied.
In view of the above problems, the embodiments of the present application propose the following embodiments, which are described in detail below with reference to the accompanying drawings.
Referring to fig. 2, fig. 2 is a flowchart illustrating an output power adjustment method according to an embodiment of the present application, applied to the exemplary communication system, the method including:
in part 201, a terminal receives a system broadcast message from a network device, determines an actual transmission power required by the terminal, and the terminal is currently in an idle state;
the System broadcast message may be, for example, a Master Information Block (MIB) and System Information Blocks (SIBs), and includes important System Information required for initial access, such as an initial power value of a reference signal and a cell frequency point. .
The terminal includes a single-antenna or dual-antenna millimeter wave terminal, which is not limited herein.
At part 202, when the terminal detects that the actual transmission power required by the terminal is greater than the preset transmission power, a self-calibration process of a Power Amplifier (PA) is started to obtain a predistortion calibration file, and the predistortion calibration file is used for determining the high transmission power after predistortion.
The preset transmission power may be, for example, 26dbm, 28dbm, or the like, and may be obtained through testing, which is not limited herein.
It can be seen that, in the embodiment of the present application, when the terminal is in an idle state, the terminal first receives a system broadcast message from the network device, determines a required actual transmission power, and then, when it is detected that the required actual transmission power is greater than a preset transmission power, starts a self-calibration process of the power amplifier PA to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmission power after predistortion. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In one possible example, the terminal starts a self-calibration process of a power amplifier PA to obtain a predistortion calibration file, including: the terminal records the output power amplitude and the output power phase of the PA in the process of controlling the input power of the PA to gradually increase to the target maximum transmitting power according to the preset step length to obtain a first corresponding relation and a second corresponding relation, wherein the first corresponding relation is the change relation of the output power amplitude along with the input power amplitude, and the second corresponding relation is the change relation of the output power phase along with the input power amplitude; and generating a predistortion calibration file according to the first corresponding relation and the second corresponding relation.
The preset step size may be, for example, 0.5dbm, 1dbm, etc., and the value of the target maximum transmission power may be, for example, 28dbm, 31dbm, etc., which may be an empirical value, and is not limited herein. The specific form of the first corresponding relationship and the second corresponding relationship may be, for example, a variation curve, which is not limited herein.
In a specific implementation, the terminal may synchronously record an output power amplitude and an output power phase of the PA in a process of controlling the input power of the PA to gradually increase from a preset initial value to a target maximum transmit power according to a preset step length, so as to obtain an output-to-input AM/AM (variation of output amplitude with input amplitude) and AM/PM (variation of output phase with input amplitude) curve.
Therefore, in this example, the linear power output range of the terminal is improved, and the generation of non-linear interference is reduced.
In one possible example, the receiving, by the terminal, a system broadcast message from a network device, and determining an actual transmit power required by the terminal, includes: the terminal receives a system broadcast message from network equipment to obtain the initial power of a downlink reference signal; measuring actual Reference Signal Received Power (RSRP); determining space propagation loss according to the initial power of the downlink reference signal and the actual reference signal receiving power; and determining the actual transmitting power required by the terminal according to the space propagation loss and the uplink power control of the physical random access channel PRACH.
In a specific implementation, the terminal may determine the spatial propagation loss according to a difference between the initial power of the downlink reference signal and the received power of the actual reference signal.
Therefore, in this example, the terminal calculates the space propagation loss value to obtain the required transmission power value through actual calculation, so that the use of excessively high transmission power is avoided, and the actual power consumption of the terminal is reduced.
In this possible example, the determining, by the terminal, the actual transmit power required by the terminal according to the spatial propagation loss and the uplink power control of the physical random access channel PRACH includes: the terminal calculates the actual transmit power required by the terminal according to the following formula,
PPRACH,f,c(i)＝{PCMAX,f,c(i)，PPRACH,target+PLf,c}
wherein, PPRACH,f,c(i) Representing the actual transmission power, P, required by said terminalCMAX,f,c(i) Representing the maximum transmission power, P, of said terminal as defined by the networkPRACH,targetIndicating the target received power, PL, expected by the networkf,cRepresenting the spatial propagation loss, i represents the transmit time.
In one possible example, after the terminal starts a self-calibration process of a power amplifier PA and obtains a predistortion calibration file, the method further includes: the terminal calls the predistortion calibration file to determine the high transmitting power after predistortion; and carrying out uplink data transmission or initiating a random access process according to the high transmitting power after the predistortion.
As can be seen, in this example, after dynamically generating the predistortion calibration file, the terminal may call the predistortion calibration file to determine the high transmission power after predistortion, and perform uplink data transmission or initiate a random access process according to the high transmission power after predistortion, and by improving the linearity of the PA, the effective output power of the PA may be improved to a certain extent.
In one possible example, before the terminal receives the system broadcast message from the network device, the method further includes: the terminal detects an uplink data transmission request, or,
the terminal detects an uplink scheduling instruction from the network equipment.
It can be seen that, in this example, the terminal may specifically perform actual transmit power calculation when there is an uplink data transmission requirement or when an uplink scheduling instruction is detected, and perform a self-calibration process of the PA after a weak signal scene is identified, to generate a predistortion calibration file, so as to improve the linearity of the PA.
Referring to fig. 3, in accordance with the embodiment shown in fig. 2, fig. 3 is a schematic diagram of another output power adjustment method provided by the embodiment of the present application, which is applied to the exemplary communication system, and the method includes:
in part 301, a network device sends a system broadcast message to a terminal, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, the required actual transmit power is used for a self-calibration process in which the terminal starts a power amplifier PA, so as to obtain a pre-distortion calibration file, the pre-distortion calibration file is used to determine a high transmit power after pre-distortion, and the required actual transmit power is greater than a preset transmit power.
It can be seen that, in the embodiment of the present application, a network device sends a system broadcast message to a terminal, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, and when the terminal detects that the actual transmit power is greater than a preset transmit power, a self-calibration process of a power amplifier PA is started to obtain a predistortion calibration file, and a high transmit power after predistortion is determined according to the predistortion calibration file. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In one possible example, after the network device sends a system broadcast message to the terminal, the method further includes: and the network equipment receives uplink data sent by the terminal according to the pre-distorted high transmitting power.
As can be seen, in this example, after dynamically generating the predistortion calibration file, the terminal may call the predistortion calibration file to determine the high transmission power after predistortion, and perform uplink data transmission according to the high transmission power after predistortion, and by improving the linearity of the PA, the effective output power of the PA may be improved to a certain extent.
In one possible example, after the network device sends a system broadcast message to the terminal, the method further includes: and the network equipment receives a random access request sent by the terminal according to the pre-distorted high transmitting power.
As can be seen, in this example, after dynamically generating the predistortion calibration file, the terminal may call the predistortion calibration file to determine the high transmission power after predistortion, and perform random access according to the high transmission power after predistortion, and improve the linearity of the PA, thereby improving the effective output power of the PA to a certain extent.
In one possible example, before the network device sends the system broadcast message to the terminal, the method further includes: and the network equipment sends an uplink scheduling instruction to the terminal.
It can be seen that, in this example, the terminal may specifically perform actual transmit power calculation when detecting the uplink scheduling instruction, perform a self-calibration process of the PA after identifying a weak signal scene, and generate a predistortion calibration file to improve the linearity of the PA, and by limiting the trigger condition, it may be ensured that the predistortion calibration file dynamically adjusted at the current time period is applied to a data transmission or random access process in real time, so as to improve the use accuracy and real-time performance of the dynamic predistortion calibration file.
Referring to fig. 4, in accordance with the embodiment of fig. 2 and fig. 3, fig. 4 is a flowchart illustrating an output power adjustment method according to an embodiment of the present application, applied to the above exemplary communication system, where the method includes:
in part 401, a network device sends a system broadcast message to a terminal, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, the required actual transmit power is used for a self-calibration process in which the terminal starts a power amplifier PA, so as to obtain a pre-distortion calibration file, the pre-distortion calibration file is used to determine a high transmit power after pre-distortion, and the required actual transmit power is greater than a preset transmit power.
At part 402, the terminal receives a system broadcast message from a network device, determines an actual transmission power required by the terminal, and the terminal is currently in an idle state;
in part 403, when the terminal detects that the actual transmit power required by the terminal is greater than a preset transmit power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmit power after predistortion.
It can be seen that, in the embodiment of the present application, when the terminal is in an idle state, the terminal first receives a system broadcast message from the network device, determines a required actual transmission power, and then, when it is detected that the required actual transmission power is greater than a preset transmission power, starts a self-calibration process of the power amplifier PA to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmission power after predistortion. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In accordance with the above embodiments, please refer to fig. 5, fig. 5 is a schematic structural diagram of a terminal provided in an embodiment of the present application, the terminal being a first terminal, and as shown, the terminal including a processor, a memory, a transceiver, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing the following steps;
receiving a system broadcast message from network equipment, and determining the actual transmitting power required by the terminal, wherein the terminal is in an idle state currently;
and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion.
It can be seen that, in the embodiment of the present application, when the terminal is in an idle state, the terminal first receives a system broadcast message from the network device, determines a required actual transmission power, and then, when it is detected that the required actual transmission power is greater than a preset transmission power, starts a self-calibration process of the power amplifier PA to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmission power after predistortion. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In one possible example, in the aspect of starting the self-calibration process of the power amplifier PA to obtain the predistortion calibration file, the instructions in the program are specifically configured to perform the following operations: recording the output power amplitude and the output power phase of the PA in the process of controlling the input power of the PA to gradually increase to the target maximum transmitting power according to a preset step length to obtain a first corresponding relation and a second corresponding relation, wherein the first corresponding relation is the change relation of the output power amplitude along with the input power amplitude, and the second corresponding relation is the change relation of the output power phase along with the input power amplitude; and generating a predistortion calibration file according to the first corresponding relation and the second corresponding relation.
In one possible example, in terms of the receiving a system broadcast message from a network device, determining an actual transmit power required by the terminal, the instructions in the program are specifically configured to: receiving a system broadcast message from network equipment to obtain initial power of a downlink reference signal; and for measuring the actual reference signal received power, RSRP; and determining spatial propagation loss according to the initial power of the downlink reference signal and the actual received power of the reference signal; and the uplink power control module is used for determining the actual transmitting power required by the terminal according to the space propagation loss and the physical random access channel PRACH.
In a possible example, in the aspect of determining the actual transmit power required by the terminal according to the spatial propagation loss and the uplink power control of the physical random access channel PRACH, the instructions in the program are specifically configured to perform the following operations: the actual transmit power required by the terminal is calculated according to the following formula,
PPRACH,f,c(i)＝{PCMAX,f,c(i)，PPRACH,target+PLf,c}
wherein, PPRACH,f,c(i) Representing the actual transmission power, P, required by said terminalCMAX,f,c(i) Representing the maximum transmission power, P, of said terminal as defined by the networkPRACH,targetIndicating the target received power, PL, expected by the networkf,cRepresenting the spatial propagation loss, i represents the transmit time.
In one possible example, the program further includes instructions for: after a pre-distortion calibration file is obtained in the self-calibration process of starting the power amplifier PA, the pre-distortion calibration file is called to determine the high transmitting power after the pre-distortion; and the uplink data transmission or the random access process is initiated according to the high transmitting power after the predistortion.
In one possible example, the program further includes instructions for: before the system broadcast message from the network device is received, an uplink data transmission request is detected, or an uplink scheduling instruction from the network device is detected.
Consistent with the above embodiments, please refer to fig. 6, fig. 6 is a schematic structural diagram of a network device provided in an embodiment of the present application, and as shown in the figure, the network device includes a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the programs include instructions for performing the following steps;
sending a system broadcast message to a terminal, wherein the system broadcast message is used for determining the actual transmitting power required by the terminal in an idle state at present, the required actual transmitting power is used for the terminal to start a self-calibration process of a Power Amplifier (PA), so as to obtain a pre-distortion calibration file, the pre-distortion calibration file is used for determining the high transmitting power after pre-distortion, and the required actual transmitting power is greater than the preset transmitting power.
It can be seen that, in the embodiment of the present application, a network device sends a system broadcast message to a terminal, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, and when the terminal detects that the actual transmit power is greater than a preset transmit power, a self-calibration process of a power amplifier PA is started to obtain a predistortion calibration file, and a high transmit power after predistortion is determined according to the predistortion calibration file. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In one possible example, the program further includes instructions for: and after the system broadcast message is sent to the terminal, receiving uplink data sent by the terminal according to the pre-distorted high transmitting power.
In one possible example, the program further includes instructions for: and after the system broadcast message is sent to the terminal, receiving a random access request sent by the terminal according to the pre-distorted high transmission power.
In one possible example, the program further includes instructions for: and sending an uplink scheduling instruction to the terminal before sending the system broadcast message to the terminal.
The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the terminal and the network device may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.
In case of an integrated unit, fig. 7 shows a block diagram of a possible functional unit composition of the terminal, which is a first terminal, referred to in the above embodiments. The terminal 700 includes: a processing unit 702 and a communication unit 703. Processing unit 702 is configured to control and manage actions of the terminal, e.g., processing unit 702 is configured to enable the terminal to perform step 201 in fig. 2, 401 in fig. 4, and/or other processes for the techniques described herein. The communication unit 703 is used to support communication between the terminal and other devices, for example, communication with a network device shown in fig. 6. The terminal may further include a storage unit 701 for storing program codes and data of the terminal.
The processing unit 702 may be a processor or a controller, the communication unit 703 may be a transceiver, a transceiver circuit, a radio frequency chip, or the like, and the storage unit 701 may be a memory.
The processing unit 702 is configured to receive a system broadcast message from a network device through the communication unit 703, and determine an actual transmission power required by the terminal, where the terminal is currently in an idle state; and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion.
It can be seen that, in this example, when the terminal is in an idle state, the terminal first receives a system broadcast message from the network device, determines a required actual transmit power, and then, when it is detected that the required actual transmit power is greater than a preset transmit power, starts a self-calibration process of the power amplifier PA to obtain a predistortion calibration file, where the predistortion calibration file is used to determine a high transmit power after predistortion. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In a possible example, in terms of the self-calibration procedure for starting the PA to obtain the predistortion calibration file, the processing unit 702 is specifically configured to: recording the output power amplitude and the output power phase of the PA in the process of controlling the input power of the PA to gradually increase to the target maximum transmitting power according to a preset step length to obtain a first corresponding relation and a second corresponding relation, wherein the first corresponding relation is the change relation of the output power amplitude along with the input power amplitude, and the second corresponding relation is the change relation of the output power phase along with the input power amplitude; and generating a predistortion calibration file according to the first corresponding relation and the second corresponding relation.
In one possible example, in terms of receiving a system broadcast message from a network device and determining an actual transmit power required by the terminal, the processing unit 702 is specifically configured to: receiving a system broadcast message from network equipment through the communication unit to obtain initial power of a downlink reference signal; and for measuring the actual reference signal received power, RSRP; and determining spatial propagation loss according to the initial power of the downlink reference signal and the actual received power of the reference signal; and the uplink power control module is used for determining the actual transmitting power required by the terminal according to the space propagation loss and the physical random access channel PRACH.
In a possible example, in the aspect of determining the actual transmission power required by the terminal according to the spatial propagation loss and the uplink power control of the physical random access channel PRACH, the processing unit 702 is specifically configured to: the actual transmit power required by the terminal is calculated according to the following formula,
PPRACH,f,c(i)＝{PCMAX,f,c(i)，PPRACH,target+PLf,c}
wherein, PPRACH,f,c(i) Representing the actual transmission power, P, required by said terminalCMAX,f,c(i) Representing the maximum transmission power, P, of said terminal as defined by the networkPRACH,targetIndicating the target received power, PL, expected by the networkf,cRepresenting the spatial propagation loss, i represents the transmit time.
In a possible example, after the self-calibration procedure of starting the power amplifier PA obtains the predistortion calibration file, the processing unit 702 is further configured to: calling the predistortion calibration file through the communication unit 703 to determine the high transmission power after the predistortion; and the uplink data transmission or the random access process is initiated according to the high transmitting power after the predistortion.
In one possible example, the processing unit 702, before the receiving the system broadcast message from the network device through the communication unit 703, is further configured to: and detecting an uplink data sending request or detecting an uplink scheduling instruction from the network equipment.
When the processing unit 702 is a processor, the communication unit 703 is a communication interface, and the storage unit 701 is a memory, the terminal according to the embodiment of the present application may be the terminal shown in fig. 5.
In the case of integrated units, fig. 8 shows a block diagram of one possible functional unit of the network device involved in the above-described embodiment. The network device 800 includes: a processing unit 802 and a communication unit 803. Processing unit 802 is configured to control and manage actions of the network device, e.g., processing unit 802 is configured to support the network device to perform step 301 in fig. 3, step 402 in fig. 4, and/or other processes for the techniques described herein. The communication unit 803 is used to support communication between the network device and other devices, for example, a terminal shown in fig. 5. The network device may also comprise a storage unit 801 for storing program codes and data of the network device.
The Processing Unit 802 may be a Processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 803 may be a transceiver, a transmitting and receiving circuit, etc., and the storage unit 801 may be a memory.
The processing unit 802 is configured to send a system broadcast message to a terminal through the communication unit 803, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, the required actual transmit power is used for a self-calibration process in which the terminal starts a power amplifier PA, and a predistortion calibration file is obtained, the predistortion calibration file is used to determine a high transmit power after predistortion, and the required actual transmit power is greater than a preset transmit power.
As can be seen, in this example, the network device sends a system broadcast message to the terminal, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, and when the terminal detects that the actual transmit power is greater than a preset transmit power, the terminal starts a self-calibration process of a power amplifier PA to obtain a predistortion calibration file, and determines a high transmit power after predistortion according to the predistortion calibration file. Therefore, the terminal can identify a weak signal scene based on the transmission power comparison in an idle state, and dynamically generate a predistortion calibration file adaptive to the current scene environment condition in real time through a self-calibration process of the PA, so that the terminal can determine the high transmission power after predistortion according to the dynamic predistortion calibration file, and perform uplink data transmission or initiate a random access process according to the high transmission power in the current scene, thereby being beneficial to the terminal to obtain higher linear output power in real time and achieving the purposes of improving the linearity of the PA and improving uplink coverage.
In one possible example, the processing unit 802 is further configured to receive, through the communication unit 803, uplink data from the terminal according to the pre-distorted high transmission power after the system broadcast message is sent to the terminal through the communication unit 803.
In one possible example, after the system broadcast message is sent to the terminal through the communication unit 803, the processing unit 802 is further configured to: a random access request sent by the terminal according to the pre-distorted high transmission power is received through the communication unit 803.
In one possible example, the processing unit 802 is further configured to, before the sending of the system broadcast message to the terminal through the communication unit 803: an uplink scheduling instruction is transmitted to the terminal through the communication unit 803.
When the processing unit 802 is a processor, the communication unit 803 is a communication interface, and the storage unit 801 is a memory, the network device according to the embodiment of the present application may be the network device shown in fig. 6.
The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the terminal in the above method embodiment.
The present application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the network device in the above method embodiments.
Embodiments of the present application also provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the terminal in the above method embodiments. The computer program product may be a software installation package.
Embodiments of the present application also provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the network device in the method. The computer program product may be a software installation package.
The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may reside as discrete components in an access network device, a target network device, or a core network device.
Those skilled in the art will appreciate that in one or more of the examples described above, the functionality described in the embodiments of the present application may be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims (20)

  1. An output power adjustment method applied to a terminal, the method comprising:
    receiving a system broadcast message from network equipment, and determining the actual transmitting power required by the terminal, wherein the terminal is in an idle state currently;
    and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion.
  2. The method of claim 1, wherein the starting a self-calibration procedure of a Power Amplifier (PA) to obtain a pre-distortion calibration file comprises:
    recording the output power amplitude and the output power phase of the PA in the process of controlling the input power of the PA to gradually increase to the target maximum transmitting power according to a preset step length to obtain a first corresponding relation and a second corresponding relation, wherein the first corresponding relation is the change relation of the output power amplitude along with the input power amplitude, and the second corresponding relation is the change relation of the output power phase along with the input power amplitude;
    and generating a predistortion calibration file according to the first corresponding relation and the second corresponding relation.
  3. The method of claim 1 or 2, wherein the receiving a system broadcast message from a network device, determining an actual transmit power required by the terminal, comprises:
    receiving a system broadcast message from network equipment to obtain initial power of a downlink reference signal;
    measuring actual Reference Signal Received Power (RSRP);
    determining space propagation loss according to the initial power of the downlink reference signal and the actual reference signal receiving power;
    and determining the actual transmitting power required by the terminal according to the space propagation loss and the uplink power control of the physical random access channel PRACH.
  4. The method of claim 3, wherein the determining the actual transmission power required by the terminal according to the spatial propagation loss and uplink power control of a Physical Random Access Channel (PRACH) comprises:
    the actual transmit power required by the terminal is calculated according to the following formula,
    PPRACH,f,c(i)＝{PCMAX,f,c(i)，PPRACH,target+PLf,c}
    wherein, PPRACH,f,c(i) Representing the actual transmission power, P, required by said terminalCMAX,f,c(i) Representing the maximum transmission power, P, of said terminal as defined by the networkPRACH,targetIndicating the target received power, PL, expected by the networkf,cRepresenting the spatial propagation loss, i represents the transmit time.
  5. The method according to any of claims 1-4, wherein after the starting of the self-calibration procedure of the power amplifier PA and obtaining the pre-distortion calibration file, the method further comprises:
    calling the predistortion calibration file to determine the high transmitting power after predistortion;
    and carrying out uplink data transmission or initiating a random access process according to the high transmitting power after the predistortion.
  6. The method of any of claims 1-5, wherein prior to receiving the system broadcast message from the network device, the method further comprises:
    the detection of an upstream data transmission request, or,
    an uplink scheduling instruction from the network device is detected.
  7. An output power adjustment method applied to a network device, the method comprising:
    sending a system broadcast message to a terminal, wherein the system broadcast message is used for determining the actual transmitting power required by the terminal in an idle state at present, the required actual transmitting power is used for the terminal to start a self-calibration process of a Power Amplifier (PA), so as to obtain a pre-distortion calibration file, the pre-distortion calibration file is used for determining the high transmitting power after pre-distortion, and the required actual transmitting power is greater than the preset transmitting power.
  8. The method of claim 7, wherein after sending the system broadcast message to the terminal, the method further comprises:
    and receiving uplink data sent by the terminal according to the pre-distorted high transmitting power.
  9. The method of claim 7, wherein after sending the system broadcast message to the terminal, the method further comprises:
    and receiving a random access request sent by the terminal according to the pre-distorted high transmitting power.
  10. The method of any of claims 7-9, wherein prior to sending the system broadcast message to the terminal, the method further comprises:
    and sending an uplink scheduling instruction to the terminal.
  11. A terminal, characterized in that it comprises a processing unit and a communication unit, wherein,
    the processing unit is configured to receive a system broadcast message from a network device through the communication unit, and determine an actual transmit power required by the terminal, where the terminal is currently in an idle state; and when detecting that the actual transmitting power required by the terminal is greater than the preset transmitting power, starting a self-calibration process of a Power Amplifier (PA) to obtain a predistortion calibration file, wherein the predistortion calibration file is used for determining the high transmitting power after predistortion.
  12. The terminal according to claim 11, wherein in the aspect of obtaining the predistortion calibration file by the self-calibration procedure of starting the PA, the processing unit is specifically configured to: recording the output power amplitude and the output power phase of the PA in the process of controlling the input power of the PA to gradually increase to the target maximum transmitting power according to a preset step length to obtain a first corresponding relation and a second corresponding relation, wherein the first corresponding relation is the change relation of the output power amplitude along with the input power amplitude, and the second corresponding relation is the change relation of the output power phase along with the input power amplitude; and generating a predistortion calibration file according to the first corresponding relation and the second corresponding relation.
  13. The terminal according to claim 11 or 12, wherein in the aspect of said receiving the system broadcast message from the network device and determining the actual transmission power required by the terminal, the processing unit is specifically configured to: receiving a system broadcast message from network equipment through the communication unit to obtain initial power of a downlink reference signal; and for measuring the actual reference signal received power, RSRP; and determining spatial propagation loss according to the initial power of the downlink reference signal and the actual received power of the reference signal; and the uplink power control module is used for determining the actual transmitting power required by the terminal according to the space propagation loss and the physical random access channel PRACH.
  14. A network device comprising a processing unit and a communication unit, wherein,
    the processing unit is configured to send a system broadcast message to a terminal through the communication unit, where the system broadcast message is used to determine an actual transmit power required by the terminal currently in an idle state, the required actual transmit power is used for a self-calibration process in which the terminal starts a power amplifier PA, so as to obtain a predistortion calibration file, the predistortion calibration file is used to determine a high transmit power after predistortion, and the required actual transmit power is greater than a preset transmit power.
  15. The terminal of claim 13, wherein the processing unit, after sending the system broadcast message to the terminal via the communication unit, is further configured to: and receiving uplink data sent by the terminal according to the pre-distorted high transmitting power through the communication unit.
  16. The terminal of claim 15, wherein the processing unit, after sending the system broadcast message to the terminal via the communication unit, is further configured to: and receiving a random access request sent by the terminal according to the pre-distorted high transmitting power through the communication unit.
  17. A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-6.
  18. A network device comprising a processor, a memory, a transceiver, and one or more programs stored in the memory and configured to be executed by the processor, the programs including instructions for performing the steps in the method of any of claims 7-10.
  19. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-6.
  20. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 7-10.
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