CN108738120B - Uplink power control method and apparatus, communication device, and storage medium - Google Patents
Uplink power control method and apparatus, communication device, and storage medium Download PDFInfo
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- CN108738120B CN108738120B CN201710278928.XA CN201710278928A CN108738120B CN 108738120 B CN108738120 B CN 108738120B CN 201710278928 A CN201710278928 A CN 201710278928A CN 108738120 B CN108738120 B CN 108738120B
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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
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
Abstract
The embodiment of the invention discloses an uplink power control method and device, communication equipment and a storage medium. The uplink transmission power control method applied to the terminal comprises the following steps: determining a reference beam of downlink transmission; acquiring the transmission loss of the reference beam; and determining the uplink transmitting power of the uplink beam transmitted in the uplink based on the transmission loss. In the technical scheme provided by the embodiment of the invention, the reference beam is determined firstly, then the downlink transmission loss of the reference beam is measured, and the uplink transmitting power of the uplink beam is calculated by combining the acquired transmission loss of the downlink beam, so that the uplink beam received by the base station can reach the target receiving power, the uplink communication quality is ensured, and the method has the characteristic of simple and convenient realization.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to an uplink power control method and apparatus, a communication device, and a storage medium.
Background
In a Long Term Evolution (LTE) system, a terminal needs to calculate uplink transmit power according to path loss. For example, the terminal measures the path loss from the common reference signal transmitted by the base station). In the fifth Generation (5G) system, in order to ensure sufficient reception quality of the base station, it is still necessary to calculate uplink transmission power. However, in the 5G system, there are a plurality of beams, and how to perform transmission loss is a problem to be solved in advance by calculating uplink transmission power.
Disclosure of Invention
In view of the above, embodiments of the present invention are directed to a method and an apparatus for uplink power control, which at least partially solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows: a first aspect of an embodiment of the present invention provides a method for controlling uplink transmit power, where the method is applied to a terminal, and includes:
determining a reference beam of downlink transmission;
acquiring the transmission loss of the reference beam;
and determining the uplink transmitting power of the uplink beam transmitted in the uplink based on the transmission loss.
A second aspect of the embodiments of the present invention provides a method for controlling uplink transmit power, which is applied in a base station, and includes:
determining a reference beam for uplink transmission power control;
and transmitting a downlink beam according to the reference beam.
A third aspect of the embodiments of the present invention provides a method for controlling uplink transmit power, which is applied to a terminal, and includes:
a first determining unit, configured to determine a reference beam for downlink transmission;
an obtaining unit configured to obtain a transmission loss of the reference beam;
a second determining unit, configured to determine uplink transmission power of an uplink beam transmitted in uplink based on the transmission loss.
A fourth aspect of the present invention provides an uplink transmit power control apparatus, which is applied in a base station, and includes:
a third determining unit, configured to determine a reference beam for uplink transmit power control;
and the transmitting unit is used for transmitting the downlink beam according to the reference beam.
A fifth aspect of an embodiment of the present invention provides a communication device, including:
a memory for storing a computer program;
and the processor is connected with the memory and is used for realizing the uplink transmission power control method provided by any item through executing the computer program.
A sixth aspect of the present invention provides a computer storage medium, where a computer program is stored, and the computer program is executed by a processor, and is capable of implementing the uplink transmission power control method provided in any of the foregoing aspects.
In the technical scheme provided by the embodiment of the invention, the terminal firstly determines the reference beam, then measures the downlink transmission loss of the reference beam, and then calculates the uplink transmitting power of the uplink beam by combining the acquired transmission loss of the downlink beam, so that the uplink beam received by the base station can reach the target receiving power, the uplink communication quality is ensured, and the method has the characteristic of simple and convenient realization.
Drawings
Fig. 1 is a flowchart illustrating a first uplink transmission power control method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a second uplink transmission power control method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first uplink transmission power control apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second uplink transmission power control apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of downlink beam transmission according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail with reference to the drawings and the specific embodiments of the specification.
As shown in fig. 1, an embodiment of the present invention provides an uplink transmit power control method, which is applied in a terminal, and includes:
step S110: determining a reference beam of downlink transmission;
step S120: acquiring the transmission loss of the reference beam;
step S130: and determining the uplink transmitting power of the uplink beam transmitted in the uplink based on the transmission loss.
The uplink transmission power control method provided by the embodiment of the invention can be applied to various terminals which utilize beams for communication. In this embodiment, the terminal may also be a User Equipment (UE), for example, a 5G communication handset.
In this embodiment, the coverage areas of the uplink beam and the downlink beam are both smaller than the coverage area of the cell formed by the base station or the cell in which the terminal is located, for example, the cell of the base station covers a sector of 120 degrees, while the downlink beam can only cover a range of less than 120 degrees, such as 10 degrees, 20 degrees, and the like
In this embodiment the reference beam is one or more of the downlink beams transmitted by the base station. One of the reference beams may be used for calculating uplink transmission power of 1 or more uplink beams of the base station.
In step S120, the terminal estimates the transmission loss of the reference signal according to the received signal strength of the reference beam, and the like.
In step S130, the uplink transmit power is calculated based on the channel reciprocity by using the transmission loss.
In this embodiment, the frequency resources corresponding to the reference beam and the uplink beam may be the same or different; preferably, the same may be used, so as to reduce the difference of transmission loss caused by different wavelengths, which in turn results in inaccurate calculation of uplink transmission power.
In this embodiment, after the uplink transmit power is calculated, the corresponding uplink beam is transmitted with the uplink transmit power. In some scenes, the maximum uplink transmitting power of the terminal is limited, and if the currently calculated uplink transmitting power is not greater than the maximum transmitting power of the terminal, the currently calculated uplink transmitting power is used for transmitting uplink beams; and if the maximum transmission power is larger than the maximum transmission power of the terminal, the terminal sends the uplink beam by the maximum transmission power.
In some embodiments, before each uplink transmission, the terminal needs to re-determine the reference beam and determine the uplink transmit power of the uplink beam based on the reference beam. In other scenarios, if the moving range of the terminal is smaller than a preset range, which is smaller than the area range of the cell where the terminal is located, the reference signal does not need to be determined again, so that the determination of the reference signal can be realized once, and the reference signal is used for calculating uplink transmission power at least twice.
The step S110 may include:
receiving downlink signaling information;
and extracting beam information of the reference beam from the downlink signaling information, wherein the beam information comprises at least one of a beam identifier of the reference beam, a resource identifier and a port identifier of the reference beam transmitted by the base station.
In this embodiment, a base station may send a downlink beam to a terminal, where the downlink beam may carry downlink signaling information, where the downlink signaling information may be various signaling information sent by the base station to the terminal, and the downlink signaling information includes: in this embodiment, the downlink signaling information sent to the terminal carries the beam information of the reference beam determined by the base station. The beam information here may be at least one of a beam Identification (ID) of the reference beam, a resource identification, and a port identification of the base station. The resource identification is a resource identification of a time-frequency resource of the reference beam. For example, the identifier of the Resource Block (RB) corresponding to the reference beam.
In this way, after the terminal receives the corresponding downlink wave beam, the reference wave beam can be simply and conveniently determined by demodulating the wave beam information carried by the downlink wave beam; therefore, the subsequent terminal can conveniently calculate the uplink transmitting power of the uplink wave beam.
Optionally, the step S110 may include:
receiving downlink scheduling information;
and selecting the reference beam from the alternative beams according to the beam corresponding relation between the carrier beam carrying the downlink scheduling information and the alternative beams.
In some embodiments, the base station performs a pre-correspondence between the downlink scheduling beam and the reference beam, thereby establishing a correspondence relationship, which is known by both the base station and the terminal in advance. In this way, if the terminal receives a downlink scheduling beam, the reference beam indicated by the current base station can be determined according to the corresponding relationship.
The method is adopted to obtain the reference beam informed by the base station, information analysis is not needed, and the method also has the characteristic of simple and convenient realization.
The step S130 may determine the uplink transmission power in various ways, and the uplink transmission power may be determined by querying a mapping table based on a mapping table between a reference beam and the uplink transmission power, and in some embodiments, the uplink transmission power may be obtained by calculating based on a functional relationship and using the transmission loss of the reference beam as an argument. Two alternative ways of calculating the uplink transmit power are provided below.
The first method is as follows: the step S130 may include:
determining the uplink transmitting power by adopting the following formula;
PUL＝f(PLc,tx_beam_index)
the P isULIs the uplink transmit power; the PLc,tx_beam_indexA transmission loss when the reference beam is received for the terminal using a default receive beam; the above-mentionedtx_beam_indexTransmitting the beam identification of the reference beam for downlink; and the C is a service cell of the terminal.
Further, the air conditioner is provided with a fan,
the second method comprises the following steps: the step S130 may include:
PUL＝f(PLc,tx_beam_index,rx_beam_index)，
the above-mentioned
A transmission loss when the reference beam is received for the terminal by using the reception beam with the beam identifier of rx _ beam _ index; the rx _ beam _ index is a beam identifier of a reception beam of the reference beam received by the terminal.
Further, in the present mode, the first and second substrates,
in both of the above-described modes, the same symbol in the formula represents the same meaning. Specifically, the P ismaxIs the maximum transmit power of the terminal; the M is the number of corresponding resource blocks when the uplink wave beam is transmitted; the P isOReceiving a target power of an uplink beam for a base station; the above-mentioned
Is a partial power adjustment coefficient; delta. theothersFor adjusting the amount of power
In some embodiments. The above-mentioned
Usually a positive number, and preferably may be a positive number less than 1. The value of M is positive number such as 1, 2 or 3. Delta. theothersFor other power compensation factors except transmission loss, a corresponding power adjustment value can be given according to a modulation mode or a closed-loop power control mode of information sent to the base station by the terminal.
In this embodiment, when the uplink transmission power calculated based on the transmission loss of the reference beam is greater than the maximum transmission power of the terminal, the maximum transmission power of the terminal is used to transmit the uplink beam.
In some embodiments, at least one of the beam identification of the reference beam and the beam identification of the receive beam is configured by a base station.
In some embodiments, the terminal may perform downlink beam measurement on the base station to obtain a measurement result, where the measurement result may indicate the reception strength or reception power of the downlink beam at the current location of the terminal. In this embodiment, the beam identifier of the reference beam corresponds to a transmission parameter of the base station for transmitting the reference beam. And the receiving identification of the receiving wave beam corresponds to the receiving parameter of the terminal for receiving the downlink wave beam. In this embodiment, the transmission parameter and the reception parameter may include a transmission weight and/or a reception weight of the base station.
In summary, in this embodiment, the base station configures the beam identifier of the reference beam and/or the beam identifier of the receiving beam based on the measurement result. Of course, the base station may also select the reference beam and the receive beam according to its resource scheduling condition and/or channel condition, so as to determine the beam identifier of the reference beam and/or the receive beam.
In some embodiments, at least one of the beam identification of the reference beam and the beam identification of the receive beam is reported by the terminal to the base station.
In this embodiment, the receiving beam and the reference beam may be provided with selectable ranges by the terminal, and then the selected selectable ranges of the reference beam and the receiving beam are reported to the base station, and the base station performs final selection confirmation, so that the beam identifiers of the reference beam and/or the receiving beam may be reported by the terminal at this time.
Optionally, the reference beam is one of:
the downlink wave beam with the optimal receiving power received by the terminal;
the receiving quality received by the terminal meets a preset condition and the downlink wave beam with the minimum interference;
and the downlink wave beam with the minimum adjacent cell interference detected by the terminal.
In this embodiment, when determining the reference beam, the base station may determine, according to a preset configuration, or may determine, according to feedback information of measurement of the terminal on the downlink beam, which downlink beams corresponding to the terminal are beams with the best reception quality, or beams with the best transmission loss, or beams with the smallest transmission interference, so as to determine the reference beam corresponding to the terminal.
Because the terminal generally selects the uplink beam which is considered to be optimal by the terminal to send information to the base station, the brightest and optimal downlink beam is generally selected as the reference beam at this time, so that the accuracy of the calculated uplink transmitting power is ensured, and the problems of power waste, short time of the terminal and the like caused by overlarge calculated uplink transmitting power are avoided; meanwhile, the problem of low receiving quality of the base station caused by over-low calculated uplink transmitting power can be avoided; thereby ensuring the receiving quality of the base station on one hand and reducing the power consumption of the terminal as much as possible on the other hand.
In some embodiments, the step S110 may further include:
a terminal receives a downlink wave beam used for downlink channel measurement, and selects the downlink wave beam with the optimal receiving power received by the terminal; or, the receiving quality received by the terminal meets a preset condition and the downlink wave beam with the minimum interference; or, the downlink wave beam with the minimum interference of the adjacent cell detected by the terminal is automatically determined as a reference wave beam; and then calculating the transmission loss of the reference beam by itself. The transmission loss of the reference beam is calculated, and the transmission loss may be determined according to a difference between downlink transmission power and downlink reception power notified by the base station, or may be determined according to a difference between downlink transmission power and downlink reception power negotiated with the base station or determined according to a communication protocol. In short, the terminal determines the transmission loss of the reference beam in many ways, and is not limited to any one of the above.
As shown in fig. 2, the present embodiment provides an uplink transmission power control method, which is applied in a base station, and includes:
step S210: determining a reference beam for uplink transmission power control;
step S220: and transmitting a downlink beam according to the reference beam.
In this embodiment, the uplink power control method applied to the base station is used for the base station to assist the terminal to control the uplink transmission power of the uplink beam.
In this embodiment, the reference beam is determined, and then the downlink beam is transmitted based on the reference beam, and the reference beam of the terminal is directly or indirectly notified through the transmission of the downlink beam, so that the terminal can conveniently calculate the uplink transmission power based on the transmission loss of the reference beam.
There are various implementations of the step S110, and several alternatives are provided as follows:
the first alternative is as follows:
receiving beam information fed back by a terminal based on downlink beam measurement; the beam information here may include: one or more of a beam identification of the reference beam, a resource identification, and a port identification of the base station. In some embodiments, the beam information may further include: the terminal provides the beam information of the receiving beam for receiving the corresponding downlink beam. Receiving beam information for a beam may include: receiving one or more of a beam identification and a resource identification of a beam;
determining the reference beam based on the beam information.
Further, the receiving terminal measures the beam information fed back based on the downlink beam, including:
and when the beam information is the beam information of a single downlink beam, determining the single downlink beam as the reference beam.
For example, the beam information reported by the current terminal only includes the beam information of one downlink beam, and the base station may directly use the downlink beam corresponding to the beam information as the reference beam to notify the terminal.
In other embodiments, the receiving terminal measures the fed back beam information based on the downlink beam, including:
and when the beam information is the beam information of a plurality of downlink beams, selecting one or more of the downlink beams as the reference beam according to a preset regulation.
In some embodiments, the terminal may report beam information of a plurality of downlink beams, and the base station may determine one or more beams as reference beams according to one or more of the plurality of information, such as current beam usage status information and the terminal location, based on a preset rule.
Optionally, when the beam information is beam information of a plurality of beams, selecting one or more beams from the plurality of beams as the reference beam according to a preset specification includes at least one of:
selecting the downlink wave beam with the optimal receiving power received by the terminal as the reference wave beam;
selecting a downlink wave beam with the receiving quality meeting a preset condition and the minimum interference received by the terminal as the reference wave beam;
and selecting the downlink wave beam with the minimum adjacent cell interference detected by the terminal as the reference wave beam.
There are various implementations of the step S120, and two implementations are provided below.
The first method is as follows: the step S120 may include:
and carrying the beam information of the reference beam in the downlink signaling information for transmission, wherein the beam information includes at least one of a beam identifier of the reference beam, a resource identifier and a port identifier of the reference beam transmitted by the base station.
The second method comprises the following steps: the step S120 may include: and sending the reference beam according to the corresponding relation between the downlink scheduling beam and the reference beam.
As shown in fig. 3, the present embodiment provides an uplink transmission power control apparatus, which is applied in a terminal, and includes:
a first determining unit 110, configured to determine a reference beam for downlink transmission;
an obtaining unit 120, configured to obtain a transmission loss of the reference beam;
a second determining unit 130, configured to determine uplink transmission power of an uplink beam transmitted in uplink based on the transmission loss.
The uplink transmission power control apparatus of this embodiment may be applied to various terminals, for example, a mobile phone, a tablet computer, and a vehicle-mounted device, which are generally used for people's conversation.
The first determining unit 110, the obtaining unit 120 and the second determining unit 130 may all correspond to a processor or a processing circuit in the terminal; the processor may include: a central processing unit, microprocessor, signal processor, application processor or programmable array, etc.; the processing circuit may include: a central integrated circuit, etc.
The processor or the processing circuit can realize the functions of the units through the execution of the formulated codes.
Optionally, the first determining unit 110 is specifically configured to receive downlink signaling information; and extracting beam information of the reference beam from the downlink signaling information, wherein the beam information comprises at least one of a beam identifier of the reference beam, a resource identifier and a port identifier of the reference beam transmitted by the base station.
The first determination unit 110 corresponds to a reception antenna and a demodulator in the present embodiment. The receiving antenna can be used for receiving downlink wave beams sent by a base station; the demodulator is configured to demodulate the beam information. The beam information may facilitate the terminal to determine which downlink beam is indicated by the base station as the reference beam.
In addition, optionally, the first determining unit 110 is specifically configured to receive downlink scheduling information; and selecting the reference beam from the alternative beams according to the beam corresponding relation between the carrier beam carrying the downlink scheduling information and the alternative beams.
In this embodiment, the first determining unit 110 may also correspond to a receiving antenna, and the receiving antenna may simply determine one of the predetermined beams as the reference beam by receiving the downlink scheduling beam and combining the corresponding relationship between the downlink scheduling beam and the predetermined beam.
Optionally, the second determining unit 130 is specifically configured to determine the uplink transmit power by using the following formula;
PUL＝f(PLc,tx_beam_index) Or, PUL＝f(PLc,tx_beam_index,rx_beam_index)
Wherein, the PULIs the uplink transmit power; the PLc,tx_beam_indexA transmission loss when the reference beam is received for the terminal using a default receive beam; the above-mentionedtx_beam_indexTransmitting the beam identification of the reference beam for downlink; the above-mentioned
Employing the beam identifier for the terminal asA transmission loss when the reference beam is received by the reception beam of rx _ beam _ index; the rx _ beam _ index is a beam identifier of a receiving beam of the reference beam received by the terminal; the above-mentionedCIs the serving cell of the terminal.
Specifically, for example,
or the like, or, alternatively,
in this embodiment, the reference beam is one of the following beams:
the downlink wave beam with the optimal receiving power received by the terminal;
the receiving quality received by the terminal meets a preset condition and the downlink wave beam with the minimum interference;
and the downlink wave beam with the minimum adjacent cell interference detected by the terminal.
In a specific implementation, the reference beam may be a downlink beam carrying a reference signal, and is not limited to the downlink beams.
In some embodiments, at least one of the beam identification of the reference beam and the beam identification of the receive beam is configured by a base station; or, at least one of the beam identifier of the reference beam and the beam identifier of the receiving beam is reported to the base station by the terminal.
As shown in fig. 4, the present embodiment provides a downlink transmission power control apparatus, which is applied in a base station, and includes:
a third determining unit 210, configured to determine a reference beam for uplink transmit power control;
a transmitting unit 220, configured to transmit a downlink beam according to the reference beam.
The third determining unit 210 according to this embodiment may correspond to a processor or a processing circuit of a base station. The processor or processing circuitry may be as in the previous embodiments. The transmitting unit 220 may correspond to a transmitting antenna of a base station, and may be configured to transmit a downlink beam based on a reference beam.
Specifically, as this embodiment, the transmitting unit 220 may be specifically configured to carry beam information of the reference beam in the downlink signaling information for transmission, where the beam information includes at least one of a beam identifier of the reference beam, a resource identifier, and a port identifier of the reference beam transmitted by the base station; and/or, the transmitting unit 220 may be further specifically configured to send the downlink scheduling information according to a corresponding relationship between a bearer beam of the downlink scheduling information and an alternative beam.
Optionally, the third determining unit 210 is specifically configured to receive beam information fed back by the terminal based on the downlink beam measurement; determining the reference beam based on the beam information.
Further optionally, the third determining unit 210 is specifically configured to determine, when the beam information is beam information of a single downlink beam, that the single downlink beam is the reference beam; or, when the beam information is the beam information of a plurality of downlink beams, selecting one or more of the plurality of downlink beams as the reference beam according to a preset specification.
Specifically, the third determining unit 210 is specifically configured to perform at least one of the following:
selecting the downlink wave beam with the optimal receiving power received by the terminal as the reference wave beam;
selecting a downlink wave beam with the receiving quality meeting a preset condition and the minimum interference received by the terminal as the reference wave beam;
and selecting the downlink wave beam with the minimum adjacent cell interference detected by the terminal as the reference wave beam.
An embodiment of the present invention provides a communication device, including:
a memory for storing a computer program;
and a processor, connected to the memory, configured to implement the uplink transmission power control method provided in any of the foregoing technical solutions by executing the computer program, for example, the uplink transmission power control method shown in fig. 1 or fig. 2.
When the communication device is a terminal, the communication device may be used in the uplink transmit power control method shown in fig. 1 and associated with fig. 1. When the communication device is a base station, the communication device may be configured to perform the method shown in fig. 2 and the uplink transmission power control method associated with fig. 2.
In this embodiment the memory may comprise various types of memory, preferably memory which may comprise a non-transitory storage medium, operable to store the computer program.
The processor may include: a central processing unit, a microprocessor, an application processor, a digital signal processor, or a programmable array, etc.
The processor and memory may be coupled by a bus, which may include an internal communication interface of a communication device such as an integrated circuit (IIC) bus, or a peripheral interconnect standard (PCI) bus.
An embodiment of the present invention further provides a computer storage medium, where a computer program is stored, and after the computer program is executed by a processor, the uplink transmission power control method according to any one of the foregoing technical solutions may be implemented, for example, by one or more of the methods shown in fig. 1 and fig. 2.
The computer storage medium provided by the embodiment of the invention can be a random access storage medium, a read-only storage medium, a flash memory or a mobile storage device or an optical disc and the like. The computer storage medium may be a non-transitory storage medium.
The embodiment of the invention also provides an uplink transmission power control method, which is applied to a base station and comprises the following steps:
and receiving the beam information fed back by the terminal based on the downlink beam measurement.
In some embodiments, the beam information is used for the base station to determine a reference beam and inform the terminal of information of the corresponding reference beam, and then the terminal measures downlink transmission loss of the reference beam and calculates uplink transmit power of the terminal based on the downlink transmission loss.
Several examples are given below in connection with one or more of the above embodiments:
example one:
as shown in fig. 5, the base station may transmit a plurality of beams to the UE at once or may transmit a plurality of beams to the UE in multiple times. In fig. 5, the base station transmits 6 beams, which are downlink beam 1, downlink beam 2, downlink beam 3, downlink beam 4, downlink beam 5, and downlink beam 6, to the terminal.
The base station scans beams, the terminal reports the beam information (beam identifiers, port identifiers, resource identifiers and the like) of a limited number of candidate beams, and the base station selects to transmit downlink reference beams within the reported beam range. The terminal performs received energy detection based on the resources transmitted on the beams and estimates the propagation loss on the corresponding beam. And the base station indicates the beam information referred by the terminal through downlink signaling. And the terminal estimates the path loss according to the reference beam indicated by the base station to obtain the transmission loss of the reference beam. When the terminal can receive by adopting multiple beams, the terminal can select the optimal beam to receive power according to the self condition, and can also select a plurality of beams to receive, and the transmission loss is respectively saved. When the terminal sends uplink, the terminal selects the optimal sending beam and the corresponding transmission loss, and can also select other stored uplink sending beams and set power corresponding to the transmission loss to send uplink. When the base station knows that the terminal can use the plurality of different receiving beams, the base station can instruct the terminal to use one of the plurality of UE side receiving beams as an uplink transmitting beam and use the corresponding uplink power control parameter based on downlink signaling. The base station will use the power reference beam previously indicated to the terminal as the uplink receiving beam.
When the base station schedules the downlink beam 1 as the measurement reference beam of the terminal, the uplink power control of the terminal is performed according to the following formula.
Wherein PLC,TX_BEAM_1Indicating a small serviceThe measured transmission on the downlink BEAM TX _ BEAM _1 in zone c. The P isPUSCH,c(i) Transmitting power for the ith subframe uplink of a Physical Uplink Shared Channel (PUSCH) in a cell c; the M isPUSCH,c(i) The number of RBs occupied by the ith subframe of the PUSCH in the cell c; the P isO_PUSCHIs the target power on the base station PUSCH; said ΔTF,c(i) Adjusting a factor for a power corresponding to the modulation mode; f isc(i) Is a closed loop power control adjustment factor. A is saidC(j) Is the partial power adjustment factor with sequence number j; the value range of j can be 0,1 or 2. When the base station performs semi-persistent scheduling on the uplink service of the terminal, j is 0, when the base station performs dynamic scheduling on the uplink service of the terminal, j is 1, and when the terminal performs random access to initiate the uplink service, j is 2. When said j takes different values, said αC(j) The specific values of (a) are different.
Example two:
in some cases, the base station uses the downlink beam 2 to transmit uplink scheduling signaling to the UE through the downlink scheduling beam, where the scheduling signaling may include beam information such as a beam identifier or set special indication information (e.g., an indicator of a specific certain beam identifier), or does not carry indication information of any power reference beam. At this time, the terminal uses the beam used by the direct reference base station downlink scheduling as the power reference beam and ignores the beam information contained in the downlink signaling. The terminal may determine not to refer to the beam information carried by the signaling according to the system configuration or according to the special indication information carried in the read signaling.
Example three:
in the process of uplink service transmission, the base station schedules the UE to use the downlink beam 2 as a reference beam for uplink transmission. Wherein, the beam id or port corresponding to the Downlink beam 2 or the corresponding resource Information is included in Downlink Control Information (DCI). And the UE is used as reference information of uplink transmission power according to the beam information indicated by the DCI and the transmission loss measured on the indicated beam. And the UE transmits the measurement information according to the corresponding downlink wave beam on a certain uplink wave beam according to the configuration. The reference beam carried in the DCI may be the same as or different from the beam transmitted by the downlink scheduling information. And the base station receives the uplink transmission time of the UE by adopting the same beam according to the instruction in the DCI.
Example four:
in the downlink service transmission process, the base station schedules the UE and performs downlink transmission, and the indication signaling (e.g., DCI) of the downlink service includes: indication information of the beam. When the UE performs uplink feedback for the transmission of the downlink service, the UE uses the propagation loss measured on the beam indicated in the DCI as an uplink transmission power reference.
And the terminal measures the downlink path loss according to the downlink beam information indicated by the base station to obtain the transmission loss of the reference beam. The beam information may be configured by the base station or obtained by reporting from the terminal. When the base station configuration is adopted, the uplink transmission can be performed based on the terminal, and when the base station adopts different beam receiving, the obtained downlink beam more suitable for serving the user is obtained. A limited number of downlink beams may also be configured for the base station based on certain principles. The reporting mode of the terminal may be beam information obtained through terminal feedback when beam scanning or other transmission is performed. When the terminal employs beam reception, the terminal may select the received energy on a particular beam as a path loss measurement according to the principle of optimal received power and/or other principles (e.g., optimal performance and minimal interference). In this case, when the terminal transmits, it is necessary to use the specific beam as an uplink transmission beam.
In addition, when the terminal employs beam reception, the corresponding transmission loss on a limited number of reception beams may also be preserved. When uplink transmission is performed, a certain beam is selected as an uplink transmission beam according to a specific principle (e.g., the interference of the neighboring cell is the lowest), and the downlink transmission loss corresponding to the beam is used as the reference information of the uplink transmission power.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units; some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all the functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may be separately used as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: a mobile storage device, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. An uplink transmission power control method, applied to a terminal, includes:
determining a reference beam of downlink transmission;
acquiring the transmission loss of the reference beam;
determining the uplink transmitting power by adopting the following formula;
wherein, the PULIs the uplink transmit power; the PLc,tx_beam_indexA transmission loss when the reference beam is received for the terminal using a default receive beam; the tx _ beam _ index is a beam identifier for downlink transmission of the reference beam; the PLc,tx_beam_index,rx_beam_indexA transmission loss when the reference beam is received for the terminal by using the reception beam with the beam identifier of rx _ beam _ index; the rx _ beam _ index is a beam identifier of a receiving beam of the reference beam received by the terminal; the C is a service cell of the terminal;
the P ismaxIs the maximum transmit power of the terminal; the M is the number of corresponding resource blocks when the uplink wave beam is transmitted, and is a positive integer greater than or equal to 1; the P isOReceiving a target power of an uplink beam for a base station; the above-mentioned
For part of the power adjustment coefficients, said
Is a positive number; delta. theothersFor regulating powerAnd (4) the whole amount.
2. The method of claim 1,
at least one of a beam identification of the reference beam and a beam identification of the receive beam is configured by a base station;
alternatively, the first and second electrodes may be,
at least one of the beam identifier of the reference beam and the beam identifier of the reception beam is reported to the base station by the terminal.
3. The method according to claim 1 or 2,
the determining the reference beam of downlink transmission includes:
receiving downlink signaling information;
extracting beam information of the reference beam from the downlink signaling information, wherein the beam information comprises at least one of a beam identifier of the reference beam, a resource identifier and a port identifier of the reference beam transmitted by a base station;
or the like, or, alternatively,
receiving downlink scheduling information;
selecting the reference beam from the alternative beam according to the corresponding relation between the carrier beam carrying the downlink scheduling information and the alternative beam;
or the like, or, alternatively,
the reference beam is one of the following beams:
the downlink wave beam with the optimal receiving power received by the terminal;
the receiving quality received by the terminal meets a preset condition and the downlink wave beam with the minimum interference;
and the downlink wave beam with the minimum adjacent cell interference detected by the terminal.
4. An uplink transmission power control device, applied in a terminal, includes:
a first determining unit, configured to determine a reference beam for downlink transmission;
an obtaining unit configured to obtain a transmission loss of the reference beam;
a second determining unit, configured to determine uplink transmission power of an uplink beam transmitted in an uplink based on the transmission loss;
the second determining unit is specifically configured to determine the uplink transmit power by using the following formula;
wherein, the PULIs the uplink transmit power; the PLc,tx_beam_indexA transmission loss when the reference beam is received for the terminal using a default receive beam; the tx _ beam _ index is a beam identifier for downlink transmission of the reference beam; the PLc,tx_beam_index,rx_beam_indexA transmission loss when the reference beam is received for the terminal by using the reception beam with the beam identifier of rx _ beam _ index; the rx _ beam _ index is a beam identifier of a receiving beam of the reference beam received by the terminal; the C is a service cell of the terminal; the P ismaxIs the maximum transmit power of the terminal; the M is the number of corresponding resource blocks when the uplink wave beam is transmitted, and is a positive integer greater than or equal to 1; the P isOReceiving a target power of an uplink beam for a base station; the above-mentioned
For part of the power adjustment coefficients, said
Is a positive number; delta. theothersIs the amount of power adjustment.
5. The apparatus of claim 4,
at least one of a beam identification of the reference beam and a beam identification of the receive beam is configured by a base station;
alternatively, the first and second electrodes may be,
at least one of the beam identifier of the reference beam and the beam identifier of the reception beam is reported to the base station by the terminal.
6. The apparatus according to claim 4 or 5,
the first determining unit is specifically configured to receive downlink signaling information; extracting beam information of the reference beam from the downlink signaling information, wherein the beam information comprises at least one of a beam identifier of the reference beam, a resource identifier and a port identifier of the reference beam transmitted by a base station;
or the like, or, alternatively,
receiving downlink scheduling information; selecting the reference beam from the alternative beam according to the corresponding relation between the carrier beam carrying the downlink scheduling information and the alternative beam;
alternatively, the first and second electrodes may be,
the reference beam is one of the following beams:
the downlink wave beam with the optimal receiving power received by the terminal;
the receiving quality received by the terminal meets a preset condition and the downlink wave beam with the minimum interference;
and the downlink wave beam with the minimum adjacent cell interference detected by the terminal.
7. A communication device, comprising:
a memory for storing a computer program;
a processor, connected to the memory, for implementing the uplink transmission power control method according to any one of claims 1 to 3 by executing the computer program.
8. A computer storage medium storing a computer program capable of implementing the uplink transmission power control method according to any one of claims 1 to 3 when the computer program is executed by a processor.
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| CN201710278928.XA CN108738120B (en) | 2017-04-25 | 2017-04-25 | Uplink power control method and apparatus, communication device, and storage medium |
| PCT/CN2018/079355 WO2018196501A1 (en) | 2017-04-25 | 2018-03-16 | Uplink power control method and apparatus, communication device and storage medium |
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| WO2023001217A1 (en) * | 2021-07-22 | 2023-01-26 | 上海推络通信科技合伙企业(有限合伙) | Method and apparatus for node in wireless communication |
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| CN103716081A (en) * | 2013-12-20 | 2014-04-09 | 中兴通讯股份有限公司 | Downlink beam determination method, apparatus and system |
| CN103891161A (en) * | 2011-10-19 | 2014-06-25 | 三星电子株式会社 | Uplink control method and apparatus in wireless communication system |
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| EP2724574B1 (en) * | 2011-06-21 | 2017-07-12 | Telefonaktiebolaget LM Ericsson (publ) | A user equipment and a method therein for transmission power control of uplink transmissions |
| WO2013025144A1 (en) * | 2011-08-15 | 2013-02-21 | Telefonaktiebolaget Lm Ericsson (Publ) | A method and an apparatus in a user equipment for controlling transmission power of the user equipment |
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| CN103716081A (en) * | 2013-12-20 | 2014-04-09 | 中兴通讯股份有限公司 | Downlink beam determination method, apparatus and system |
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