CN102300304B - A kind of implementation method of uplink power control and device - Google Patents
A kind of implementation method of uplink power control and device Download PDFInfo
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Abstract
The present invention relates to the communications field, disclose a kind of implementation method and device of uplink power control, in order to balance up-downgoing transmitted power, improve the accuracy of uplink power control.The method is: base station is by sending the configuration information of TPC command to terminal, terminal is made to know the word length of corresponding TPC command in DCI and original position, and mail to terminal after generating corresponding DCI according to the word length of this TPC command in DCI and original position, terminal is according to the configuration information obtained, corresponding TPC command is obtained in the DCI received, and the power adjustment adopting TPC command corresponding is to Row sum-equal matrix during uplink transmission power, like this, effectively increase the scope that the uplink transmission power of base station to terminal adjusts, ensure that under any application scenarios, base station all can adopt adjustment amount accurately to carry out accommodation to uplink transmission power by indicating terminal, thus balance up-downgoing transmitted power, improve the accuracy of uplink power control.
Description
Technical Field
The present invention relates to communication systems, and in particular, to a method and an apparatus for implementing uplink power control.
Background
An RRH (radio remote unit), also called RRU, RRE, distributed antenna, etc., is a radio unit separate from a BBU (baseband processing unit), and is usually placed in a different geographical location from the BBU. The RRH comprises a radio frequency circuit, an A/D conversion part, a D/A conversion part, an optical transmission module and the like, and is connected with the BBU through an optical fiber.
The distributed RRHs are a network form using RRH networking, and the RRHs are dispersed in a cell, so that a high-quality communication service can be provided for the terminal due to a small distance from the terminal. Since data of all RRHs in a cell are processed by the BBU in a centralized manner, which makes efficient cooperation between the RRHs possible, the distributed RRHs become an important scenario for CoMP (coordinated multipoint transmission) research. In practical application, the deployment of the distributed RRH can be divided into two situations, namely a scene without a macro base station and a scene with the macro base station; in a scenario with a macro base station, an increased RRH is generally adopted to satisfy hot spot coverage in a local area based on an existing network, that is, the RRH does not need to cover all locations, and therefore the geographic location of the RRH is generally random (related to the location where the hot spot appears). For example, referring to fig. 1, an eNodeB (i.e., a macro base station) achieves Cell coverage through a base station tower, i.e., Cell0, while a plurality of hotspots, referred to as hotspot 1, hotspot 2, hotspot 3, and hotspot 4, exist in Cell0, and the eNodeB achieves coverage of these hotspots through a plurality of RRHs.
Under the scene of a macro base station, the cell ID of the RRH and the cell ID of the macro base station can be the same or different; however, when the cell IDs of the RRH and the macro base station are the same, the conventional method for performing uplink power control is as follows:
in general, the macro base station and the RRH may transmit the same CRS (cell-specific reference signal) to the UE (terminal), that is, the transmission power of the macro base station and the RRH is different and the other information (e.g., the physical resource location occupied by the CRS) is the same, and the transmission power of the RRH is lower than that of the macro base station. The CRS received by the UE is the superposition of the CRS sent by the macro base station and the RRH, the UE carries out path loss measurement according to the superposed CRS, and then carries out uplink power control according to the measurement result; accordingly, in the uplink transmission process, the base station and the RRH both receive the signal transmitted by the UE, and the transmission power adopted by the UE for both is the same. Obviously, in the prior art, the transmission power used by the RRH to transmit the CRS is lower than the transmission power used by the macro base station to transmit the CRS, and the UE performs the path loss measurement according to the superposition result of the RRH and the CRS transmitted by the macro base station, and a large error is introduced when the uplink power control is performed based on the measurement result; for example, when the UE is close to a certain RRH, the actual path loss between the RRH and the UE is small, but if the UE performs path loss measurement according to the superimposed CRS, the transmission power value adopted by the macro base station to transmit the CRS is large, so that the finally obtained measurement result is large and may be much larger than the actual path loss between the UE and the RRH, thereby causing uplink transmission power waste when performing uplink power control (that is, the macro base station and the RRH both use the same uplink transmission power); on the contrary, if the UE is far away from the macro base station, the actual path loss between the macro base station and the UE is large, but if the UE performs path loss measurement according to the superimposed CRS, the transmission power value adopted by the RRH to transmit the CRS is small, so that the finally obtained measurement result is small and may be far smaller than the actual path loss between the UE and the macro base station, thereby causing the shortage of uplink transmission power when performing uplink power control (that is, the macro base station and the RRH both use the same uplink transmission power).
In summary, in the current uplink power control process, the UE needs to perform downlink path loss measurement to adjust the uplink transmission power. The existing path loss measurement is performed based on the received power and the transmitted power of the CRS, and a measurement result is obtained by a ratio of the received power and the transmitted power. However, in some CoMP scenarios, there are several RRHs and the same cell ID adopted by the macro base station, the macro base station and the RRHs transmit CRS together to the UE, the UE usually performs path loss measurement according to the superimposed CRS, and since the transmission powers of the CRS of the base station and the RRHs are different, the path loss to the UE is also different, and the UE performs path loss measurement after superimposing the CRS transmitted by the RRHs and the macro base station, which may cause a large error in an estimated measurement result compared with the actual uplink path loss of the UE, thereby causing a large or small uplink transmission power. Obviously, the existing imbalance of the uplink and downlink power transmission power makes the accuracy of the downlink path loss measurement and the uplink power control difficult to guarantee.
To solve the above problem, in order to correct an uplink power control error introduced by a downlink path loss measurement error, a solution adopted in the prior art is as follows: the base station can adjust the uplink transmission power through high-layer signaling or closed-loop power control. However, the limitations of the existing solutions are: if the error of the downlink path loss measurement is large, the existing adjusting mechanism does not meet the adjusting requirement of the uplink power control.
The specific reasons are as follows:
currently, the uplink transmission power of PUSCH (physical uplink shared channel) is obtained by the following formula:
PPUSCH(i)＝min{PCMAX，10log10(MPUSCH(i))+PO_PUSCH(j)+α(j)·PL+ΔTF(i)+f(i)}
wherein, PCMAXIs the maximum uplink transmit power that the UE can support; mPUSCH(i) Is the bandwidth of the PUSCH; pO_PUSCH(j) Is PO_Nominal_PUSCH(j) (cell broadcast parameters) and UE-specific PO_UE_PUSCH(j) The sum of (high-level power control parameters); PL is downlink path loss estimation, which is measured by the UE, and its value is the ratio of CRS (cell-specific measurement pilot) downlink transmission power of the base station to RSRP (reference signal receiving power) measured by the UE; f (i) is a power control parameter of a closed loop, which is obtained by a power control command in DCI (downlink control information) format 0/4/3/3a, and f (i) may be an accumulated value or an absolute value. Wherein, the parameter used by the closed loop power control is mainly PO_UE_PUSCH(j) And f (i), the former informs UE through high layer signaling, can perform quasi-static power control, its data size is 4 bits, power regulation range is [ -7, 8]The power adjustment step length is 1 dB; the latter notifies the UE through PDCCH (physical downlink control channel) signaling, which may be an accumulated value f (i) ═ f (i-1) +taken for the previous timePUSCHThe absolute value f (i) ═ may bePUSCH，
TABLE I
Referring to table I, indicated by power control commands in different DCIformat (downlink control information format)PUSCHThe values are different.
On the other hand, currently, uplink transmission power of PUCCH (physical uplink control channel) is obtained by the following formula:
PPUCCH(i)＝min{PCMAX，PO_PUCCH+PL+h(nCQI，nHARQ)+ΔF_PUCCH(F)+ΔTxD(F′)+g(i)}
wherein, the values of the parameters are similar to that of PUSCH, and deltaF_PUCCH(F) The adjustment values of different PUCCHformats are configured by high-level parameters; pO_PUCCH(j) Is PO_Nominal_PUCCH(j) (cell broadcast parameters) and UE-specific PO_UE_PUCCH(j) The sum of (high-level power control parameters); PL is the downlink path loss estimate; deltaTxD(F') is a difference value associated with transmit diversity; h (n)CQI，nHARQ) Is a function related to the number of transmitted information bits, defined by each puchformat, respectively; g (i) is derived from PDCCH signaling,is the accumulation of the previous power control result.
TABLE II
Referring to Table II, the power control commands in different DCIformats indicatePUCCHThe values are different. From the above technical contents, it can be seen that, in the existing method for adjusting the uplink transmission power of the UE from the base station, PO_UE_PUSCH(j) And PO_UE_PUCCH(j) Only has 4 bits of data size, the adjustment indication range is limited, and f (i) is indicated by DCI, the number of bits is small, the adjustment step length is short, and the uplink power control error caused by the imbalance of uplink and downlink power generation power may even reach dozens of dB when the uplink power control error is large, obviously, in this case, the existing adjustment mechanism is difficult to satisfy the adjustment of uplink transmission powerAnd (4) demand.
Disclosure of Invention
The embodiment of the invention provides a method and a device for realizing uplink power control, which are used for balancing uplink and downlink transmission power and improving the accuracy of uplink power control.
The embodiment of the invention provides the following specific technical scheme:
a method for realizing uplink power control comprises the following steps:
sending configuration information of a power control command to a terminal side, wherein the configuration information at least comprises the word length and the starting position of the power control command in DCI;
generating at least one power control command according to the power control requirement;
generating a corresponding DCI based on the at least one power control command;
and sending the DCI to at least one terminal, enabling the at least one terminal to obtain a corresponding power control command in the received DCI according to the obtained configuration information, and adjusting uplink sending power according to the power control command.
A method for realizing uplink power control comprises the following steps:
receiving configuration information of a power control command sent by a network side, wherein the configuration information at least comprises a word length and a starting position of the power control command in DCI;
receiving DCI sent by a network side, wherein the DCI is generated by the network side according to the configuration information and at least one power control command;
and according to the obtained configuration information, obtaining a corresponding power control command in the received DCI, and adjusting the uplink transmission power according to the power control command.
An apparatus for implementing uplink power control, comprising:
a first communication unit, configured to send configuration information of a power control command to a terminal side, where the configuration information at least includes a word length and a starting position of the power control command in DCI;
a first processing unit for generating at least one power control command according to a power control requirement;
a second processing unit for generating a corresponding DCI based on the at least one power control command;
and the second communication unit is used for sending the DCI to at least one terminal, enabling the at least one terminal to obtain a corresponding power control command in the received DCI according to the obtained configuration information, and adjusting the uplink sending power according to the power control command.
An apparatus for implementing uplink power control, comprising:
a first communication unit, configured to receive configuration information of a power control command sent by a network side, where the configuration information at least includes a word length and a starting position of the power control command in DCI;
a second communication unit, configured to receive DCI transmitted by a network side, where the DCI is generated by the network side according to the configuration information and at least one power control command;
and the adjusting unit is used for acquiring a corresponding power control command in the received DCI according to the acquired configuration information and adjusting the uplink transmission power according to the power control command.
In the embodiment of the invention, the base station sends the configuration information of the TPC command to the terminal to enable the terminal to acquire the word length and the initial position of the set TPC command in DCI, then the base station generates the DCI according to the configuration information and sends the DCI to the terminal, the terminal acquires the corresponding TPC command from the received DCI according to the acquired configuration information and adjusts the uplink transmission power by adopting the power adjustment quantity corresponding to the TPC command, so that the base station adopts the DCI to transmit the TPC command to the terminal, the adjustment range of the uplink transmission power of the terminal by the base station is effectively enlarged, the base station can indicate the terminal to adopt the accurate adjustment quantity to adaptively adjust the uplink transmission power in any application scene, the uplink transmission power and the downlink transmission power are balanced in time, and the accuracy of uplink power control is improved.
Drawings
FIG. 1 is a diagram of a prior art communication system architecture;
FIG. 2 is a functional block diagram of a base station according to an embodiment of the present invention;
FIG. 3 is a functional block diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a base station indicating a terminal to perform uplink power control according to an embodiment of the present invention;
fig. 5 is a schematic diagram of DCI carrying a TPC command generated by a base station in an embodiment of the present invention;
fig. 6 is a flowchart illustrating uplink power control performed by a terminal according to a base station indication in an embodiment of the present invention.
Detailed Description
In order to balance uplink and downlink transmission power and improve the accuracy of uplink power control, in the embodiment of the present invention, a base station sends configuration information of a power control command to a terminal, so that the terminal knows a word length and a starting position of the power control command in DCI (downlink control information) set for the terminal, then the base station generates corresponding DCI according to the word length and the starting position of the power control command in the DCI and sends the DCI to the terminal, and the terminal obtains a corresponding TPC command in the received DCI according to the obtained configuration information, and adjusts uplink transmission power in a time-line manner by using a power adjustment amount corresponding to the TPC command. The english name corresponding to the power control command is "transmissionpowercontrollmommand" which is simply referred to as "TPC command".
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the embodiment of the present invention, the system includes several base stations and terminals, as shown in fig. 2 and 3,
the base station comprises a first communication unit 20, a first processing unit 21, a second processing unit 22 and a second communication unit 23, wherein,
a first communication unit 20, configured to send configuration information of a TPC command to a terminal side, where the configuration information at least includes a word length and a starting position of the TPC command in DCI;
a first processing unit 21 for generating at least one TPC command according to a power control requirement;
a second processing unit 22, configured to generate a corresponding DCI based on the at least one TPC command;
a second communication unit 23, configured to send DCI to at least one terminal, enable the at least one terminal to obtain a corresponding TPC command in the received DCI according to the obtained configuration information, and adjust uplink transmission power according to the TPC command.
The terminal comprises a first communication unit 30, a second communication unit 31 and an adjustment unit 32, wherein,
a first communication unit 30, configured to receive configuration information of a TPC command sent by a network side, where the configuration information at least includes a word length and a starting position of the TPC command in DCI;
a second communication unit 31, configured to receive DCI sent by a network side, where the DCI is generated by the network side according to the configuration information and at least one TPC command;
an adjusting unit 32, configured to obtain a corresponding TPC command in the received DCI according to the configuration information, and adjust uplink transmit power according to the TPC command.
Based on the above technical solution, referring to fig. 4, in the embodiment of the present invention, a detailed flow of the base station indicating the terminal to perform uplink power control is as follows:
step 400: and the base station sends configuration information of the TPC command to the terminal side, wherein the configuration information at least comprises the word length and the starting position of the TPC command in the DCI.
In this embodiment, when setting the word length of the TPC command in the DCI, a bit or a bit group may be used as a unit, and when setting the start position of the TPC command in the DCI, a bit or a bit group may also be used as a unit.
For example, if a bit group is defined to contain 2 bits, a TPC command with a word length of 2 corresponds to 4 bits in DCI. For another example, if a bit group is defined to contain 2 bits, the TPC command with the start position of 2 starts from the 4 th bit in the DCI. In this embodiment, the number of the start position of each bit or bit group starts from 0.
In this embodiment, preferably, the base station may issue different configuration information of the TPC command for different terminals, and further, in order to save traffic, the base station may multiplex the TPC commands of multiple terminals in the same DCI for transmission, so that the terminals can know the word length and the starting position of the corresponding TPC command in the DCI only according to the configuration information obtained by the terminals themselves, so as to obtain the TPC command in time.
Step 410: the base station generates at least one TPC command based on the power control requirement.
The method specifically comprises the following steps: when configuring the uplink transmission related parameters of the terminal, the base station sets a target receiving power of an uplink signal, and if the terminal sends the uplink signal once, the base station can determine what adjustment needs to be made to the uplink transmitting power of the terminal according to the relation between the actual receiving power of the received uplink signal and the set target receiving power, such as +1dB or-1 dB, so that a TPC command can be generated.
Step 420: and the base station generates corresponding DCI based on the at least one TPC command.
The method specifically comprises the following steps: and the base station determines the word length and the starting position of the at least one TPC command in the DCI, and then writes the at least one TPC command into a corresponding field in the DCI according to the word length and the starting position of the at least one TPC command in the DCI.
In this embodiment, the base station may generate corresponding DCI based on the TPC commands for different terminals, or, preferably, may multiplex the TPC commands for different terminals in the same DCI.
For example, referring to fig. 5, it is assumed that 3 TPC commands can be carried in DCI, where a word length of TPC1 is 2 bits, a word length of TPC2 is 1 bit from bit 0, a word length of TPC3 is 3 bits from bit 2, and a word length of TPC3 is 3 bits from bit 3. TPC commands with different word lengths are multiplexed in the same DCI, so that the transmission efficiency can be effectively improved. The 3 TPC command words shown in fig. 5 may be respectively configured to three different terminals, and the terminal extracts a corresponding TPC command from the DCI by using the configuration information (word length and start position of the TPC command) allocated to the terminal itself.
Obviously, by carrying the TPC commands with different word lengths in the DCI, the uplink transmit power adjustment range of the base station can be expanded, so that the base station can implement more detailed and accurate uplink power control.
Step 430: and the base station sends the generated DCI to at least one terminal, so that the at least one terminal acquires a corresponding power control command from the received DCI according to the acquired configuration information, and adjusts the uplink transmission power according to the power control command.
The method specifically comprises the following steps: the base station can send DCI carrying exclusive TPC command to a terminal according to the power control requirement, and the terminal directly obtains the TPC command in the received DCI according to the obtained configuration information; or, the base station may also send DCI carrying the multiplexing TPC command to multiple terminals according to the power control requirement, so that each terminal acquires its own TPC command in the received DCI according to the acquired configuration information.
After a base station sends DCI carrying TPC commands to a terminal, the terminal acquires the TPC commands of the terminal from the received DCI, determines the current value of the TPC commands, determines the uplink transmission power adjustment amount corresponding to the current value of the acquired TPC commands according to the mapping relation between the preset TPC command value and the uplink transmission power adjustment amount, and finally adjusts the uplink transmission power according to the determined uplink transmission power adjustment amount.
Based on the above embodiments, referring to fig. 6, in the embodiments of the present invention, a detailed flow of performing uplink power control by a terminal according to an instruction of a base station is as follows:
step 600: and the terminal receives configuration information of the TPC command sent by the base station, wherein the configuration information at least comprises the word length and the starting position of the TPC command in the DCI.
Step 610: and the terminal receives DCI sent by the base station, wherein the DCI is generated by the base station according to the configuration information and at least one TPC command.
The specific generation manner of the DCI refers to the related description of step 420, and is not described herein again.
Step 620: and the terminal acquires a corresponding TPC command from the received DCI according to the acquired configuration information, and adjusts the uplink transmission power according to the TPC command.
When the terminal acquires the own TPC command in the DCI, the word length and the initial position of the own TPC command can be determined firstly according to the acquired configuration information, and then the corresponding TPC command is read in the corresponding field of the received DCI according to the word length and the initial position of the TPC command; the terminal can also determine the word length of the TPC command in the DCI by taking a bit as a unit or a bit group as a unit; or/and determining the starting position of the TPC command of the user in the DCI by taking the bit as a unit or taking the bit group as a unit.
After obtaining the own TPC command, the terminal determines the current value of the TPC command, determines the uplink transmission power adjustment amount corresponding to the current value of the TPC command according to the mapping relationship between the preset TPC command value and the uplink transmission power adjustment amount, and then adjusts the local uplink transmission power according to the determined uplink transmission power adjustment amount.
In the embodiment of the present invention, the mapping relationship between the TPC command value and the uplink transmit power adjustment amount may be set in the following manner (for example, but not limited to):
for a TPC command with a word length of 1 bit, the meaning of the TPC command can be explained as in table 1, where the adjustment amount of power is represented, for example, if 1 indicates that the terminal needs to increase the uplink transmission power by 1dB, that is, the uplink transmission power adjustment amount is 1 dB.
TABLE 1
| TPC commands in DCI | δ[dB] |
| 0 | -1 |
| 1 | 1 |
For a TPC command with a word length of 2 bits, the meaning of the TPC command can be explained as in table 2 or table 3:
TABLE 2
| TPC commands in DCI | δ[dB] |
| 0 | -1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
TABLE 3
| TPC commands in DCI | δ[dB] |
| 0 | -3 |
| 1 | -1 |
| 2 | 0 |
| 3 | 1 |
For a TPC command with a word length of 3 bits, the meaning of the TPC command can be explained as in table 4, table 5, table 6 or table 7:
TABLE 4
| TPC commands in DCI | δ[dB] |
| 0 | -7 |
| 1 | -5 |
| 2 | -3 |
| 3 | -1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 5 |
TABLE 5
| TPC commands in DCI | δ[dB] |
| 0 | -7 |
| 1 | -5 |
| 2 | -3 |
| 3 | -1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 5 |
| 7 | 7 |
TABLE 6
| TPC commands in DCI | δ[dB] |
| 0 | -5 |
| 1 | -3 |
| 2 | -1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 5 |
| 7 | 7 |
TABLE 7
| TPC commands in DCI | δ[dB] |
| 0 | -9 |
| 1 | -7 |
| 2 | -5 |
| 3 | -3 |
| 4 | -1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 3 |
In the embodiment of the invention, the base station sends the configuration information of the TPC command to the terminal to ensure that the terminal knows the word length and the initial position of the TPC command set for the terminal in the DCI command, then, the base station generates corresponding DCI according to the word length and the initial position in the DCI by the TPC command and sends the DCI to the terminal, and the terminal obtains the configuration information, obtaining corresponding TPC command in the received DCI, adjusting the uplink transmission power by adopting the power adjustment quantity corresponding to the TPC command, therefore, the base station transmits the TPC command to the terminal by using the DCI, so that the adjustment range of the base station on the uplink transmission power of the terminal is effectively enlarged, and the base station can indicate the terminal to adopt an accurate adjustment amount to adaptively adjust the uplink transmission power in any application scene, thereby balancing the uplink transmission power and the downlink transmission power in time and improving the accuracy of uplink power control.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (20)
1. A method for implementing uplink power control includes:
sending configuration information of a power control command to a terminal side, wherein the configuration information at least comprises a word length and a starting position of the power control command in Downlink Control Information (DCI);
generating at least two power control commands according to the power control requirements;
generating corresponding DCI based on the at least two power control commands, wherein the word length of the power control command carried in the DCI is selected from a plurality of different candidate values;
and sending the DCI to at least two terminals, enabling the at least two terminals to obtain corresponding power control commands in the received DCI according to the obtained configuration information, and adjusting uplink sending power according to the power control commands.
2. The method of claim 1, wherein generating the corresponding DCI based on the at least two power control commands comprises:
determining a word length and a starting position of the at least two power control commands in the DCI;
and writing the at least two power control commands into corresponding fields in the DCI according to the word length and the starting position of the at least two power control commands in the DCI.
3. The method of claim 2, wherein determining the word length and starting position of the at least two power control commands in the DCI comprises:
determining word lengths of the at least two power control commands in the DCI in units of bits or in units of bit groups;
or/and
determining a starting position of the at least two power control commands in the DCI in units of bits or in units of bit groups.
4. The method of claim 1,2 or 3, wherein transmitting the DCI to at least two terminals and enabling the terminals to obtain corresponding power control commands in the received DCI according to the obtained configuration information comprises:
sending the DCI to a terminal according to power control requirements, and enabling the terminal to acquire a power control command of the terminal in the received DCI according to the acquired configuration information; or,
and sending the DCI to a plurality of terminals according to power control requirements, and enabling each terminal to acquire respective power control commands in the received DCI according to the acquired configuration information.
5. The method of claim 1,2 or 3, wherein the causing the at least two terminals to adjust uplink transmission power according to the obtained power control command comprises:
and enabling the at least two terminals to determine the current value of the power control command, determining the uplink transmission power adjustment amount corresponding to the current value of the power control command according to the mapping relation between the preset power control command value and the uplink transmission power adjustment amount, and adjusting the uplink transmission power according to the uplink transmission power adjustment amount.
6. The method of claim 5, wherein the mapping relationship between the power control command value and the uplink transmission power adjustment value comprises:
when the power control command value is {0,1}, the corresponding uplink transmission power adjustment quantity is { -1db,1db };
when the power control command value is {0,1,2,3}, the corresponding uplink transmission power adjustment quantity is { -1db,0db,1db,3db }, or { -3db, -1db,0db,1db };
when the power control command takes a value of {0,1,2,3,4,5,6,7}, the corresponding uplink transmission power adjustment quantities are { -7db, -5db, -3db, -1db,0db,1db,3db,5db }, or { -7db, -5db, -3db, -1db,1db,3db,5db,7db }, or { -5db, -3db, -1db,0db,1db,3db, 7db }, or { -9db, -7db, -5db, -3db, -1db,0db,1db,3db }, respectively.
7. A method for implementing uplink power control includes:
receiving configuration information of a power control command sent by a network side, wherein the configuration information at least comprises a word length and a starting position of the power control command in Downlink Control Information (DCI);
receiving DCI sent by a network side, wherein the DCI is generated by the network side according to the configuration information and at least two power control commands, and the word length of the power control command carried in the DCI is selected from a plurality of different candidate values;
and according to the obtained configuration information, obtaining a corresponding power control command in the received DCI, and adjusting the uplink transmission power according to the power control command.
8. The method of claim 7, wherein obtaining the corresponding power control command in the received DCI according to the obtained configuration information comprises:
determining the word length and the initial position of a corresponding power control command in the DCI according to the obtained configuration information;
and reading the power control command in a corresponding field of the DCI according to the word length and the starting position of the power control command in the DCI.
9. The method of claim 8, wherein determining a word length and a starting position of a corresponding power control command in the DCI according to the obtained configuration information comprises:
determining the word length of the power control command in the DCI by taking a bit as a unit or taking a bit group as a unit;
or/and
determining a starting position of the power control command in the DCI in units of bits or in units of bit groups.
10. The method of claim 7, 8 or 9, wherein adjusting uplink transmit power according to the power control command comprises:
and determining the current value of the power control command, determining the uplink transmission power adjustment amount corresponding to the current value of the power control command according to the mapping relation between the preset power control command value and the uplink transmission power adjustment amount, and adjusting the uplink transmission power according to the uplink transmission power adjustment amount.
11. The method of claim 10, wherein the mapping relationship between the power control command value and the uplink transmission power adjustment value comprises:
when the power control command value is {0,1}, the corresponding uplink transmission power adjustment quantity is { -1db,1db };
when the power control command value is {0,1,2,3}, the corresponding uplink transmission power adjustment quantity is { -1db,0db,1db,3db }, or { -3db, -1db,0db,1db };
when the power control command takes a value of {0,1,2,3,4,5,6,7}, the corresponding uplink transmission power adjustment quantities are { -7db, -5db, -3db, -1db,0db,1db,3db,5db }, or { -7db, -5db, -3db, -1db,1db,3db,5db,7db }, or { -5db, -3db, -1db,0db,1db,3db, 7db }, or { -9db, -7db, -5db, -3db, -1db,0db,1db,3db }, respectively.
12. An apparatus for implementing uplink power control, comprising:
a first communication unit, configured to send configuration information of a power control command to a terminal side, where the configuration information at least includes a word length and a starting position of the power control command in downlink control information DCI;
a first processing unit for generating at least two power control commands according to a power control requirement;
a second processing unit, configured to generate a corresponding DCI based on the at least two power control commands, where word lengths of the power control commands carried in the DCI are selected from multiple different candidate values;
and the second communication unit is used for sending the DCI to at least two terminals, enabling the at least two terminals to obtain corresponding power control commands in the received DCI according to the obtained configuration information, and adjusting the uplink sending power according to the power control commands.
13. The apparatus of claim 12, wherein the second processing unit generates the corresponding DCI based on the at least two power control commands, comprising:
the second processing unit determines the word length and the starting position of the at least two power control commands in the DCI;
and the second processing unit writes the at least two power control commands into corresponding fields in the DCI according to the word length and the starting position of the at least two power control commands in the DCI.
14. The apparatus of claim 13, wherein the second processing unit to determine the word length and starting position of the at least two power control commands in DCI comprises:
the second processing unit determines word lengths of the at least two power control commands in the DCI in units of bits or in units of bit groups;
or/and
the second processing unit determines starting positions of the at least two power control commands in the DCI in units of bits or in units of bit groups.
15. The apparatus of claim 12, 13 or 14, wherein the second communication unit sends the DCI to at least two terminals, and instructs the terminals to obtain corresponding power control commands in the received DCI according to the obtained configuration information, and the method includes:
the second communication unit sends the DCI to one terminal according to the power control requirement, and the terminal is enabled to acquire a power control command of the terminal in the received DCI according to the acquired configuration information; or,
and the second communication unit sends the DCI to a plurality of terminals according to power control requirements, and each terminal is enabled to acquire respective power control commands in the received DCI according to the acquired configuration information.
16. The apparatus as claimed in claim 12, 13 or 14, wherein the second signaling unit signals the at least two terminals to adjust uplink transmission power according to the obtained power control command, including:
and the second communication unit commands the at least two terminals to determine the current value of the power control command, determines the uplink transmission power adjustment amount corresponding to the current value of the power control command according to the mapping relation between the preset power control command value and the uplink transmission power adjustment amount, and adjusts the uplink transmission power according to the uplink transmission power adjustment amount.
17. An apparatus for implementing uplink power control, comprising:
a first communication unit, configured to receive configuration information of a power control command sent by a network side, where the configuration information at least includes a word length and a starting position of the power control command in downlink control information DCI;
a second communication unit, configured to receive DCI sent by a network side, where the DCI is generated by the network side according to the configuration information and at least two power control commands, and a word length of a power control command carried in the DCI is selected from multiple different candidate values;
and the adjusting unit is used for acquiring a corresponding power control command in the received DCI according to the acquired configuration information and adjusting the uplink transmission power according to the power control command.
18. The apparatus of claim 17, wherein the adjusting unit obtains a corresponding power control command in the received DCI according to the obtained configuration information, comprising:
the adjusting unit determines the word length and the initial position of the corresponding power control command in the DCI according to the obtained configuration information;
and the adjusting unit reads the power control command in a corresponding field of the DCI according to the word length and the starting position of the power control command in the DCI.
19. The apparatus of claim 18, wherein the adjusting unit determines a word length and a starting position of the power control command in the DCI according to the obtained configuration information, comprising:
the adjusting unit determines the word length of the power control command in the DCI by taking a bit as a unit or a bit group as a unit;
or/and
the adjusting unit determines a starting position of the power control command in the DCI in units of bits or in units of bit groups.
20. The apparatus of claim 17, 18 or 19, wherein the adjusting unit adjusts the uplink transmission power according to the power control command, and comprises:
the adjusting unit determines the current value of the power control command, determines the uplink transmission power adjustment amount corresponding to the current value of the power control command according to the mapping relation between the preset power control command value and the uplink transmission power adjustment amount, and adjusts the uplink transmission power according to the uplink transmission power adjustment amount.
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| CN103379605A (en) * | 2012-04-26 | 2013-10-30 | 电信科学技术研究院 | Uplink power control method, device and system |
| EP2894908B1 (en) | 2012-09-28 | 2019-12-04 | Huawei Technologies Co., Ltd. | Method for power adjustment, base station, and user equipment |
| CN103891367B (en) * | 2012-10-09 | 2017-10-24 | 华为技术有限公司 | Physical Uplink Control Channel circule power control method, equipment and system |
| CN104301065B (en) * | 2013-07-16 | 2018-12-11 | 电信科学技术研究院 | A kind of instruction of uplink-downlink configuration determines method and base station, terminal |
| CN104812041A (en) * | 2014-01-24 | 2015-07-29 | 中国移动通信集团公司 | Uplink signal emission power determining method and apparatus |
| CN107623942B (en) * | 2016-07-14 | 2022-06-17 | 中兴通讯股份有限公司 | Method and device for adjusting uplink power |
| CN107690179A (en) * | 2016-08-04 | 2018-02-13 | 北京信威通信技术股份有限公司 | A kind of method and device of uplink power control |
| CN111492695B (en) * | 2018-02-01 | 2023-07-25 | Oppo广东移动通信有限公司 | User equipment and wireless communication method thereof |
| CN110337123B (en) * | 2019-07-30 | 2022-05-10 | 中国信息通信研究院 | Uplink power control method, system and test system |
| CN115811779A (en) * | 2021-09-14 | 2023-03-17 | 华为技术有限公司 | Uplink power indication method and device |
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| CN102006657A (en) * | 2009-08-31 | 2011-04-06 | 华为技术有限公司 | Uplink power control method, device and terminal |
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