CN111885697B - Method for controlling power and uplink synchronization, related equipment and computer storage medium - Google Patents
Method for controlling power and uplink synchronization, related equipment and computer storage medium Download PDFInfo
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- CN111885697B CN111885697B CN202010738541.XA CN202010738541A CN111885697B CN 111885697 B CN111885697 B CN 111885697B CN 202010738541 A CN202010738541 A CN 202010738541A CN 111885697 B CN111885697 B CN 111885697B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0473—Wireless resource allocation based on the type of the allocated resource the resource being transmission power
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application provides a power control and uplink synchronization method, related equipment and a computer storage medium, wherein the power control method comprises the following steps: before an uplink signal is sent through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion; calculating to obtain a first transmitting power by utilizing the current transmitting power; wherein the first transmit power is greater than the current transmit power; and taking the current transmission power as the transmission power of the data signal part of the uplink signal, and taking the first transmission power as the transmission power of the reference signal part of the uplink signal. By only improving the transmitting power of the reference signal part, the accuracy of the estimated time offset value, the channel response, the frequency offset value and other parameters is ensured, and the terminal is not excessively power-consuming.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method for power control and uplink synchronization, a related device, and a computer storage medium.
Background
When a terminal sends data to a gateway station, there is a transmission delay caused by a transmission distance, so in order to send the data to the gateway station at a desired time and ensure orthogonality of uplink transmission, it is necessary to estimate time for sending the data in advance and send the data in advance according to the estimated time, thereby implementing uplink timing synchronization of each terminal.
In the satellite communication field, a terminal can send an uplink signal to a gateway station through a physical uplink control channel (Physical Uplink Control Channel, PUCCH), then the gateway station estimates a time offset value according to the uplink signal, and issues a time adjustment command of the estimated time offset value to the terminal, so that the terminal adjusts the sending time of data according to the time adjustment command, thereby implementing uplink timing synchronization.
However, the current transmission power calculated by using the transmission power calculation formula of the physical uplink control channel is used as the transmission power sent by the terminal PUCCH, and the signal-to-noise ratio of the uplink signal is relatively low due to the smaller transmission power, so that the estimated accurate time offset value cannot be effectively ensured.
Disclosure of Invention
Based on the shortcomings of the prior art, the application provides a power control and uplink synchronization method, related equipment and a computer storage medium, so as to solve the problem that the time offset value cannot be estimated accurately when the transmitting power obtained through a calculation formula is used as an uplink signal sent by a terminal to a PUCCH.
In order to achieve the above object, the present application provides the following technical solutions:
the first aspect of the present application provides a method for controlling power of a channel, including:
before an uplink signal is sent through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
calculating to obtain a first transmitting power by utilizing the current transmitting power; wherein the first transmit power is greater than the current transmit power;
and taking the current transmission power as the transmission power of the data signal part of the uplink signal, and taking the first transmission power as the transmission power of the reference signal part of the uplink signal.
Optionally, in the method for controlling power of a channel, the calculating, by using the current transmit power, the first transmit power includes:
calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; wherein the reference signal power offset value is a difference value of transmission powers of a reference signal portion and a data signal portion configured in a communication protocol;
Determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
Optionally, in the method for controlling power of a channel, the step of using the current transmission power as the transmission power of the data signal portion of the uplink signal and using the first transmission power as the transmission power of the reference signal portion of the uplink signal includes:
converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value;
performing amplitude adjustment on a reference signal portion of the uplink signal by using the first amplitude adjustment value, and performing amplitude adjustment on a data signal portion of the uplink signal by using the second amplitude adjustment value; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
The second aspect of the present application provides a method for uplink timing synchronization, including:
before an uplink signal is sent to a gateway station through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
calculating to obtain a first transmitting power by utilizing the current transmitting power; the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement;
the current transmitting power is used as the transmitting power of a data signal part of the uplink signal, the first transmitting power is used as the transmitting power of a reference signal part of the uplink signal, and the uplink signal is sent to the gateway station through the physical uplink control channel;
receiving a time adjustment command issued by the gateway station; the time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station;
and adjusting the uplink sending time according to the time adjustment command.
Optionally, in the method for uplink timing synchronization, the calculating the first transmit power by using the current transmit power includes:
Calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; the reference signal power offset value is a difference value of transmission power of a reference signal part and a data signal part configured in a communication protocol;
determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
Optionally, in the method for uplink timing synchronization, the step of using the current transmission power as a transmission power of a data signal portion of the uplink signal and using the first transmission power as a transmission power of a reference signal portion of the uplink signal, and sending the uplink signal to the gateway station through the physical uplink control channel includes:
converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value;
Performing amplitude adjustment on a reference signal part of the uplink signal generated by the physical layer by using the first amplitude adjustment value, and performing amplitude adjustment on a data signal part of the uplink signal generated by the physical layer by using the second amplitude adjustment value;
transmitting the uplink signal subjected to amplitude adjustment to the gateway station through the physical uplink control channel; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
A third aspect of the present application provides a power control apparatus for a channel, including:
the first calculation unit is used for calculating the current transmitting power of the physical uplink control channel before the uplink signal is transmitted through the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
the second calculation unit is used for calculating the first transmission power by utilizing the current transmission power; wherein the first transmit power is greater than the current transmit power;
and the adjusting unit is used for taking the current transmitting power as the transmitting power of the data signal part of the uplink signal and taking the first transmitting power as the transmitting power of the reference signal part of the uplink signal.
Optionally, in the above-mentioned power control device for a channel, the second calculating unit includes:
the second calculating subunit is used for calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; wherein the reference signal power offset value is a difference value of transmission powers of a reference signal portion and a data signal portion configured in a communication protocol;
a determining unit configured to determine a smaller value of the operational transmission power and the current maximum output power as the first transmission power by comparing magnitude relations of the operational transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
Optionally, in the above-mentioned power control device for a channel, the adjusting unit includes:
a conversion unit, configured to convert the first transmission power into a first amplitude adjustment value and convert the current transmission power into a second amplitude adjustment value;
an adjusting subunit, configured to perform amplitude adjustment on a reference signal portion of the uplink signal by using the first amplitude adjustment value, and perform amplitude adjustment on a data signal portion of the uplink signal by using the second amplitude adjustment value; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
A fourth aspect of the present application provides an apparatus for uplink timing synchronization, including:
the first power calculation unit is used for calculating the current transmitting power of the physical uplink control channel before the physical uplink control channel transmits an uplink signal to the gateway station; wherein the uplink signal includes a data signal portion and a reference signal portion;
the second power calculation unit is used for calculating the first transmission power by utilizing the current transmission power; the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement;
a power adjustment unit, configured to take the current transmission power as a transmission power of a data signal portion of the uplink signal, and take the first transmission power as a transmission power of a reference signal portion of the uplink signal;
a transmitting unit, configured to transmit the uplink signal to the gateway station through the physical uplink control channel;
the receiving unit is used for receiving the time adjustment command issued by the gateway station; the time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station;
And the time adjustment unit is used for adjusting the uplink transmission time according to the time adjustment command.
Optionally, in the apparatus for uplink timing synchronization provided above, the second power calculating unit includes:
the operation unit is used for calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; the reference signal power offset value is a difference value of transmission power of a reference signal part and a data signal part configured in a communication protocol;
a power determining unit configured to determine a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing magnitude relations of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
Optionally, in the apparatus for uplink timing synchronization provided above, the power adjustment unit includes:
a power scaling unit for scaling the first transmit power to a first amplitude adjustment value and the current transmit power to a second amplitude adjustment value;
A power adjustment subunit, configured to perform amplitude adjustment on a reference signal portion of the uplink signal generated by the physical layer by using the first amplitude adjustment value, and perform amplitude adjustment on a data signal portion of the uplink signal generated by the physical layer by using the second amplitude adjustment value;
the sending unit is used for sending the uplink signal subjected to amplitude adjustment to the gateway station through the physical uplink control channel; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
A fifth aspect of the present application provides a control apparatus, comprising:
one or more processors;
a memory having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of power control of a channel as described in any of the preceding.
A sixth aspect of the present application provides a terminal, including:
a communication component; one or more processors; a memory having one or more programs stored thereon;
The one or more programs, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
before an uplink signal is sent to a gateway station through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
calculating to obtain a first transmitting power by utilizing the current transmitting power; the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement;
the current transmitting power is used as the transmitting power of a data signal part of the uplink signal, the first transmitting power is used as the transmitting power of a reference signal part of the uplink signal, and the uplink signal is transmitted to the gateway station through the physical uplink control channel by the communication component;
receiving a time adjustment command issued by the gateway station through the communication component; the time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station;
and adjusting the uplink sending time according to the time adjustment command.
Optionally, in the above terminal, when the one or more processors calculate the first transmit power using the current transmit power, the one or more processors are configured to:
calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; the reference signal power offset value is a difference value of transmission power of a reference signal part and a data signal part configured in a communication protocol;
determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
Optionally, in the above terminal, when the one or more processors perform the current transmission power as a transmission power of a data signal portion of the uplink signal and the first transmission power as a transmission power of a reference signal portion of the uplink signal, the one or more processors are configured to:
converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value;
Performing amplitude adjustment on a reference signal part of the uplink signal generated by the physical layer by using the first amplitude adjustment value, and performing amplitude adjustment on a data signal part of the uplink signal generated by the physical layer by using the second amplitude adjustment value;
the communication component sends the uplink signal with the amplitude adjusted to the gateway station through the physical uplink control channel; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
A sixth aspect of the present application provides a computer readable medium having stored thereon a computer program, wherein the program when executed by a processor implements a method of power control of a channel as described in any of the above, or a method of uplink timing synchronization as described in any of the above.
According to the power control method for the channel, before the uplink signal is sent through the physical uplink control channel, the current transmission power of the physical uplink control channel is calculated, and then the first transmission power which is larger than the current transmission power value is calculated on the basis of the current transmission power. And finally, taking the current transmitting power as the transmitting power of the data signal part in the uplink signal, taking the first transmitting power as the transmitting power of the reference signal part of the uplink signal, and transmitting the uplink signal to the gateway station through a physical uplink control channel, thereby improving the transmitting power of the reference signal part in the uplink signal transmitted to the gateway station through the physical uplink control channel, improving the signal-to-noise ratio of the reference signal, and further effectively ensuring the estimated accurate time offset value.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.
Fig. 1 is a flow chart of a method for controlling power of a channel according to an embodiment of the present application;
fig. 2 is a flowchart of a method for calculating a first transmission power according to an embodiment of the present application;
fig. 3 is a flowchart of a method for adjusting transmit power according to an embodiment of the present application;
fig. 4 is a flowchart of a method for uplink timing synchronization according to another embodiment of the present application;
fig. 5 is a flowchart of a method for calculating a first transmission power according to another embodiment of the present application;
fig. 6 is a flowchart of a method for adjusting transmit power according to another embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a power control device for a channel according to another embodiment of the present application;
FIG. 8 is a schematic diagram of a second computing unit according to another embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of an adjusting unit according to another embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of an apparatus for uplink timing synchronization according to another embodiment of the present application;
fig. 11 is a schematic structural diagram of a control device according to another embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a terminal according to another embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
In this application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The signal-to-noise ratio of the signal is affected by the transmitting power adopted by the terminal in transmitting the signal to the gateway station, and the signal with a lower signal-to-noise ratio can cause a larger error in the result obtained by performing subsequent calculation by using the signal. However, increasing the transmission power increases the power consumption of the terminal, so the transmission power cannot be simply increased to a higher value, and thus the embodiment of the present application provides a power control method of a channel, as shown in fig. 1, which specifically includes the following steps:
s101, before an uplink signal is sent through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel.
The uplink signal sent by the terminal through the physical uplink control channel comprises a data signal part and a reference signal part. The data signal portion specifically refers to uplink control information for implementing control, such as acknowledgement signals (ACK/NACK), information Indication of channel quality (Channel Quality Indicator, CQI), rank Indication (RI), etc., which account for most of the uplink signals and are the main portions in the uplink signals. But the reference signal part with relatively smaller occupation ratio in the uplink signal is used for estimating the uplink time offset value or channel estimation, channel response and frequency offset value, and the reference signal part can specifically comprise a demodulation reference signal (DMRS).
In the communication protocol, when the uplink signal through the physical uplink control channel has been determined, a calculation formula of the transmission power of the uplink signal is adopted. In the prior art, when a terminal passes through an uplink signal of a physical uplink control channel, the terminal directly transmits the uplink signal to a gateway station according to the transmission power calculated by a transmission power calculation formula of the physical uplink control channel. In the present application, the current transmission power of the physical uplink control channel is also calculated by using a transmission power calculation formula of the physical uplink control channel determined in the communication protocol.
Specifically, the calculation formula of the transmitting power of the physical uplink control channel is as follows:
Calculated power and P CMAX (i) As the current transmit power. Wherein P is PUCCH (i) Is the current transmitting power; p (P) CMAX (i) Maximum output power configured for a terminal defined on a current transmission occasion i for a current serving cell in a communication protocol; p (P) O_PUCCH For the component parameter P O_NOMINAL_PUCCH Sum of (d) and component parameter P O_UE_PUCCH Composition of the obtained parameters, P O_UE_PUCCH And P O_NOMINAL_PUCCH Are provided by higher layer parameters in the communication protocol.
A resource block number for PUCCH transmission occasion i on active UL BWPb of the serving cell; PL is the downlink path loss estimate; delta F_PUCCH (F) Parameters, delta, provided for the higher layer parameters deltaF-PUCCH-f0 by PUCCH format 0 or deltaF-PUCCH-f1 by PUCCH format 1 TF,b,c (i) The parameters are adjusted for the transmission power at transmission occasion i, g (i) being the power control value of the PUCCH at the current transmission occasion i.
Specifically, according to the current cell of the terminal and the transmission time, each parameter in a transmission power calculation formula is determined, and then each parameter is substituted into the formula to calculate the current transmission power of the physical uplink control channel.
S102, calculating to obtain first transmitting power by using the current transmitting power, wherein the first transmitting power is larger than the current transmitting power.
Because the current transmission power of the physical uplink control channel is calculated to be smaller by using the transmission power calculation formula of the physical uplink control channel, a first transmission power larger than the current transmission power needs to be calculated on the basis of the calculated current transmission power. Specifically, the preset power value may be increased based on the current transmission power, so as to obtain the first transmission power. Or, according to different conditions of the serving cell where the terminal is located, the first transmitting power which accords with the current serving cell can be obtained by correspondingly calculating the current transmitting power.
Optionally, a specific embodiment of step S102, as shown in fig. 2, includes:
s201, calculating the sum of the current transmitting power and the reference signal power offset value to obtain the operation transmitting power.
Wherein the reference signal power offset value is a difference in transmit power of a reference signal portion and a data signal portion configured in the communication protocol. Specifically, a field of a reference signal power offset value for format 1 of PUCCH may be added to PUCCH power control parameters in configuration information of radio control (Radio Resource Control, RRC), and the reference power offset value may be configured in the field.
S202, determining a smaller value of the calculated transmission power and the current maximum output power as a first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power.
Wherein the current maximum output power is the maximum output power of the terminal defined on the current transmission time for the current service cell in the communication protocol, namely P in the transmission power calculation formula of the physical uplink control channel CMAX (i)。
Therefore, the calculation method for calculating the first transmission power in the embodiment of the present application may be expressed as: p (P) PUCCH_DMRS (i)＝min{P CMAX (i),P PUCCH (i)+P DMRSOffset -a }; wherein P is DMRSOffset Is a reference signal power offset value. It can be seen that the first transmit power calculated by this formula must be greater than the current transmit power. In general, P CMAX (i) Far more than the current transmit power P PUCCH (i) The first transmit power is typically equal to the sum of the current transmit power and the reference signal power offset.
S103, taking the current transmission power as the transmission power of the data signal part of the uplink signal, and taking the first transmission power as the transmission power of the reference signal part of the uplink signal.
Because the reference signal part in the uplink signal is used for realizing the functions of estimating the uplink time offset value or channel estimation, etc., in the embodiment of the application, only the transmission power of the reference signal part of the uplink signal is raised, and the data signal part of the uplink signal still adopts the calculated current transmission power. And because the duty ratio of the reference signal part in the uplink signal is relatively smaller, the accuracy of the result obtained by using the uplink signal to perform subsequent calculation can be ensured under the condition of avoiding excessively increasing the power consumption of the terminal, namely, the accuracy of the parameters such as the time offset value, the frequency offset value, the channel response, the signal power, the noise power, the signal-to-noise power ratio and the like of the uplink channel estimation obtained based on the uplink signal is ensured.
Optionally, a specific embodiment of step S103, as shown in fig. 3, includes the following steps:
s301, converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value.
Specifically, in the prior art, the amplitude adjustment value corresponding to the current power obtained through calculation can be used for carrying out amplitude adjustment on the uplink signal, so that the uplink signal is transmitted to the gateway station with corresponding transmitting power. Therefore, in the embodiment of the present application, the adjustment of the transmission power is also achieved by the amplitude adjustment value, so that the first transmission power needs to be converted into the first amplitude adjustment value and the current transmission power needs to be converted into the second amplitude adjustment value.
S302, amplitude adjustment is performed on a reference signal portion of the uplink signal by using the first amplitude adjustment value, and amplitude adjustment is performed on a data signal portion of the uplink signal by using the second amplitude adjustment value.
The transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power. Therefore, after the uplink signal is adjusted by the first amplitude adjustment value and the second amplitude adjustment value, the transmission power of the reference signal portion of the transmitted uplink signal is the first transmission power, and the transmission power of the data signal portion of the transmitted uplink signal is the current transmission power.
Since uplink timing synchronization is achieved by transmitting a channel sounding reference signal (Sounding Reference Signal, SRS), a terminal and a gateway station are required to develop for SRS characteristics, which not only increases development cost, occupies time-frequency resources of a system for carrying information, but also increases complexity of signal processing of the terminal and the gateway station. Further, since the SRS function in the satellite communication system can be realized by using a physical uplink control channel (Physical Uplink Control Channel, PUCCH) of the system, uplink timing synchronization is generally realized by PUCCH in the satellite communication field. The problem of transmission power is related to the implementation of uplink timing synchronization through the PUCCH, so the power control method of the channel provided in the above embodiment may be applied to an application scenario where uplink timing synchronization is implemented through the PUCCH. Therefore, based on the method for controlling the power of the channel provided by the above embodiment, the method for uplink timing synchronization provided by another embodiment of the present application, as shown in fig. 4, specifically includes the following steps:
s401, before sending an uplink signal to a gateway station through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel.
Wherein the uplink signal includes a data signal portion and a reference signal portion. The reference signal portion is used to estimate the time offset value.
It should be noted that, the specific implementation of step S401 may refer to step S101 in the above embodiment accordingly, and will not be described herein again.
Alternatively, in order to achieve uplink timing synchronization, the terminal needs to transmit an uplink signal to the gateway station for the gateway station to estimate the time offset, maintaining uplink timing synchronization, typically at most 10 ms each. Therefore, the transmission period of format 1 configuring the terminal PUCCH in the communication protocol is less than or equal to 10 milliseconds. Thus, the method provided by the embodiments of the present application is performed once per configured transmission period.
S402, calculating to obtain first transmitting power by using the current transmitting power, wherein the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement.
In the embodiment of the present application, the first transmit power is mainly used to realize uplink timing synchronization, so that the first transmit power meets the channel estimation requirement, and may meet the estimation requirement of the time offset value.
Note that the specific calculation process of step S402 may be the same as that of step S102, so the specific calculation process of step S402 may be referred to accordingly. In the embodiment of the present application, uplink timing synchronization is required, so that a signal-to-noise ratio of a reference signal portion is required, and the signal-to-noise ratio of the reference signal portion is too low, so that an estimated time offset value is inaccurate, and therefore, the first transmission power is not only greater than the current transmission power, but also needs to meet the estimation requirement of the time offset value, that is, the signal-to-noise ratio of the reference signal can meet the requirement of accurately estimating the time offset value.
Optionally, a specific embodiment of step S402, as shown in fig. 5, includes the following steps:
s501, calculating the sum of the current transmitting power and the reference signal power offset value to obtain the operation transmitting power.
Wherein the reference signal power offset value is a difference in transmit power of a reference signal portion and a data signal portion configured in the communication protocol.
S502, determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power.
The current maximum output power is the maximum output power of the terminal defined on the current transmission occasion for the current serving cell in the communication protocol.
It should be noted that, the specific implementation of steps S501 and S502 may refer to step 201 and step S202 in the above embodiments respectively. The difference is that the configured reference signal power offset value needs to be such that the calculated first transmit power meets the requirement of the estimated time offset value.
S403, the current transmitting power is used as the transmitting power of the data signal part of the uplink signal, the first transmitting power is used as the transmitting power of the reference signal part of the uplink signal, and the uplink signal is sent to the gateway station through the physical uplink control channel.
That is, when the uplink signal is transmitted to the gateway station through the physical uplink control channel, the transmission power of the reference signal portion of the uplink signal is the first transmission power after elevation, and the transmission power of the data signal portion of the uplink signal is the current transmission power obtained by calculation.
Optionally, a specific embodiment of step S404, as shown in fig. 6, specifically includes:
s601, converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value.
S602, performing amplitude adjustment on a reference signal part of an uplink signal generated by a physical layer by using a first amplitude adjustment value, and performing amplitude adjustment on a data signal part of the uplink signal generated by the physical layer by using a second amplitude adjustment value.
It should be noted that, the specific implementation manner of step S601 and step S602 may refer to step S301 and step S304 in the foregoing embodiments, respectively.
And S603, transmitting the uplink signal subjected to amplitude adjustment to a gateway station through a physical uplink control channel.
The transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
S404, receiving a time adjustment command issued by the gateway station.
The time adjustment command is obtained by processing the time offset value estimated according to the uplink signal by the gateway station. Specifically, after receiving the uplink signal, the gateway station demodulates the uplink signal by its physical layer to obtain an estimated time offset value, and then uploads the time offset value to the higher layer of the gateway station, that is, to the medium access control layer (Media Access Control, MAC) for processing, thereby obtaining a time adjustment command (Timing Advance Command, TAC), and finally issues the TAC command to the terminal.
S405, adjusting the uplink transmission time according to the time adjustment command.
Specifically, because the signal needs to be sent in advance to realize uplink timing synchronization, the terminal subtracts the time offset value on the basis of the original uplink sending time, thereby obtaining adjusted time, and sends the signal when the adjusted time is reached, thereby realizing uplink timing synchronization.
According to the uplink timing synchronization method provided by the embodiment of the application, before an uplink signal is sent to a gateway station through a physical uplink control channel, the current transmission power of the physical uplink control channel is calculated by using a transmission power calculation formula of the physical uplink control channel, and then the first transmission power which is larger than the current transmission power value is calculated on the basis of the current transmission power. And finally, taking the current transmitting power as the transmitting power of the data signal part in the uplink signal, taking the first transmitting power as the transmitting power of the reference signal part of the uplink signal, and transmitting the uplink signal to the gateway station through a physical uplink control channel, thereby improving the transmitting power of the reference signal part in the uplink signal transmitted to the gateway station through the physical uplink control channel, enabling the gateway station to accurately estimate the time offset value according to the reference signal transmitted by high power, and not bringing too much power consumption to the terminal. Although the power of the uplink signal is controlled mainly for the purpose of achieving uplink timing synchronization in the embodiment of the present application, the accuracy of the respective parameters such as the frequency offset value and the channel response determined based on the uplink signal is also improved due to the improvement of the transmission power of the reference signal portion.
Another embodiment of the present application provides a power control apparatus for a channel, as shown in fig. 7, including:
the first calculating unit 701 is configured to calculate, before sending the uplink signal through the physical uplink control channel, a current transmission power of the physical uplink control channel.
Wherein the uplink signal includes a data signal portion and a reference signal portion. The method can be calculated by using a transmission power calculation formula of a physical uplink control channel.
A second calculating unit 702, configured to calculate the first transmit power by using the current transmit power.
Wherein the first transmit power is greater than the current transmit power.
An adjusting unit 703, configured to take the current transmission power as the transmission power of the data signal portion of the uplink signal, and take the first transmission power as the transmission power of the reference signal portion of the uplink signal.
Optionally, in the power control apparatus for a channel provided in another embodiment of the present application, as shown in fig. 8, the second calculating unit 702 includes: a second calculation subunit 801 and a determination unit 802.
A second calculating subunit 801, configured to calculate a sum of the current transmit power and the reference signal power offset value, to obtain an operational transmit power.
Wherein the reference signal power offset value is a difference in transmit power of a reference signal portion and a data signal portion configured in the communication protocol.
A determining unit 802, configured to determine, as the first transmission power, a smaller value of the calculated transmission power and the current maximum output power by comparing magnitude relations of the calculated transmission power and the current maximum output power.
The current maximum output power is the maximum output power of the terminal defined on the current transmission occasion for the current serving cell in the communication protocol.
Optionally, an adjusting unit in a power control device for a channel according to another embodiment of the present application, as shown in fig. 9, includes:
and a scaling unit 901, configured to scale the first transmit power to a first amplitude adjustment value and scale the current transmit power to a second amplitude adjustment value.
An adjusting subunit 902, configured to perform amplitude adjustment on the reference signal portion of the uplink signal by using the first amplitude adjustment value, and perform amplitude adjustment on the data signal portion of the uplink signal by using the second amplitude adjustment value.
The transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
It should be noted that, the specific working process of each unit of the power control device for a channel provided in the foregoing embodiment may correspondingly refer to the implementation of the power control method for a channel provided in any foregoing embodiment, which is not repeated herein.
Another embodiment of the present application provides an apparatus for uplink timing synchronization, as shown in fig. 10, including:
a first power calculation unit 1001, configured to calculate, before sending an uplink signal to a gateway station through a physical uplink control channel, a current transmission power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion.
A second power calculating unit 1002, configured to calculate the first transmit power by using the current transmit power.
The first transmitting power is larger than the current transmitting power, and meets the channel estimation requirement.
A power adjustment unit 1003, configured to take the current transmission power as a transmission power of a data signal portion of the uplink signal, and take the first transmission power as a transmission power of a reference signal portion of the uplink signal.
A transmitting unit 1004, configured to transmit an uplink signal to the gateway station through a physical uplink control channel.
A receiving unit 1005, configured to receive a time adjustment command issued by the gateway station.
The time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station.
A time adjustment unit 1006, configured to adjust the uplink transmission time according to the time adjustment command.
Optionally, a second power calculating unit in an apparatus for uplink timing synchronization provided in another embodiment of the present application includes: an arithmetic unit and a power determination unit.
The operation unit is used for calculating the sum of the current transmission power and the reference signal power offset value to obtain operation transmission power; the reference signal power offset value is the difference in transmit power of a reference signal portion and a data signal portion configured in the communication protocol.
The power determining unit is used for determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power.
The current maximum output power is the maximum output power of the terminal defined on the current transmission occasion for the current serving cell in the communication protocol.
Optionally, a power adjustment unit in an apparatus for uplink timing synchronization provided in another embodiment of the present application includes: a power scaling unit and a transmit power adjustment unit.
The power scaling unit is used for scaling the first transmission power into a first amplitude adjustment value and scaling the current transmission power into a second amplitude adjustment value.
The transmitting power adjusting unit is used for adjusting the amplitude of the reference signal part of the uplink signal generated by the physical layer by using the first amplitude adjusting value, and adjusting the amplitude of the data signal part of the uplink signal generated by the physical layer by using the second amplitude adjusting value.
The transmitting unit 1004 is configured to transmit the uplink signal after the amplitude adjustment to the gateway station through a physical uplink control channel. The transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
It should be noted that, the specific working process of each unit of the device for uplink timing synchronization provided in the foregoing embodiment may correspondingly refer to the implementation of the method for uplink timing synchronization provided in any foregoing embodiment, which is not repeated herein.
Another embodiment of the present application provides a control device, as shown in fig. 11, including:
one or more processors 1101.
The one or more programs, when executed by the one or more processors 1101, cause the one or more processors to implement the method of power control of a channel as in any of the embodiments described above.
Another embodiment of the present application provides a terminal, as shown in fig. 12, including:
a communication assembly 1201, one or more processors 1202; memory 1203 has one or more programs stored thereon.
The one or more programs in the memory 1203, when executed by the one or more processors 1202, cause the one or more processors to implement the method for uplink timing synchronization provided in any of the foregoing embodiments, specifically may implement the following operations:
before an uplink signal is sent to a gateway station through a physical uplink control channel, the current transmitting power of the physical uplink control channel is calculated.
Wherein the uplink signal includes a data signal portion and a reference signal portion.
And calculating the first transmitting power by using the current transmitting power. The first transmitting power is larger than the current transmitting power, and meets the channel estimation requirement.
The current transmitting power is used as the transmitting power of the data signal part of the uplink signal, the first transmitting power is used as the transmitting power of the reference signal part of the uplink signal, and the uplink signal is transmitted to the gateway station through the physical uplink control channel by the communication component.
A time adjustment command issued by the gateway station is received via the communication component.
The time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station.
And adjusting the uplink transmission time according to the time adjustment command.
Optionally, in another embodiment of the present application, when the one or more processors of the terminal calculate the first transmit power using the current transmit power, the one or more processors are configured to:
calculating the sum of the current transmitting power and the reference signal power offset value to obtain the calculated transmitting power; the reference signal power offset value is the difference in transmit power of a reference signal portion and a data signal portion configured in the communication protocol.
Determining a smaller value of the calculated transmission power and the current maximum output power as a first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion for the current serving cell in the communication protocol.
Optionally, in another embodiment of the present application, when the one or more processors execute the current transmission power as the transmission power of the data signal portion of the uplink signal and the first transmission power is used as the transmission power of the reference signal portion of the uplink signal, the one or more processors are configured to:
The first transmit power is scaled to a first amplitude adjustment value and the current transmit power is scaled to a second amplitude adjustment value.
And performing amplitude adjustment on the reference signal part of the uplink signal generated by the physical layer by using the first amplitude adjustment value, and performing amplitude adjustment on the data signal part of the uplink signal generated by the physical layer by using the second amplitude adjustment value.
And the communication component transmits the uplink signal with the amplitude adjusted to the gateway station through a physical uplink control channel. The transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
Another embodiment of the present application provides a computer readable medium having a computer program stored thereon, where the program when executed by a processor implements a method for controlling power of a channel as provided in any one of the embodiments above, or a method for uplink timing synchronization as provided in any one of the embodiments above.
Alternatively, the storage medium may be a non-transitory computer readable storage medium, for example, a ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A method for power control of a channel, comprising:
before an uplink signal is sent through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; wherein the reference signal power offset value is a difference value of transmission powers of a reference signal portion and a data signal portion configured in a communication protocol;
determining a smaller value of the calculated transmission power and the current maximum output power as a first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of a terminal defined on the current transmission time aiming at the current service cell in the communication protocol; wherein the first transmit power is greater than the current transmit power;
and taking the current transmission power as the transmission power of the data signal part of the uplink signal, and taking the first transmission power as the transmission power of the reference signal part of the uplink signal.
2. The method of claim 1, wherein the taking the current transmit power as the transmit power of the data signal portion of the uplink signal and the first transmit power as the transmit power of the reference signal portion of the uplink signal comprises:
converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value;
performing amplitude adjustment on a reference signal portion of the uplink signal by using the first amplitude adjustment value, and performing amplitude adjustment on a data signal portion of the uplink signal by using the second amplitude adjustment value; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
3. A method for uplink timing synchronization, comprising:
before an uplink signal is sent to a gateway station through a physical uplink control channel, calculating to obtain the current transmitting power of the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
Calculating to obtain a first transmitting power by utilizing the current transmitting power; the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement;
the current transmitting power is used as the transmitting power of a data signal part of the uplink signal, the first transmitting power is used as the transmitting power of a reference signal part of the uplink signal, and the uplink signal is sent to the gateway station through the physical uplink control channel;
receiving a time adjustment command issued by the gateway station; the time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station;
and adjusting the uplink sending time according to the time adjustment command.
4. A method according to claim 3, wherein said calculating a first transmit power using said current transmit power comprises:
calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; the reference signal power offset value is a difference value of transmission power of a reference signal part and a data signal part configured in a communication protocol;
Determining a smaller value of the calculated transmission power and the current maximum output power as the first transmission power by comparing the magnitude relation of the calculated transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
5. A method according to claim 3, wherein said taking the current transmit power as the transmit power of the data signal portion of the uplink signal and the first transmit power as the transmit power of the reference signal portion of the uplink signal and transmitting the uplink signal to the gateway station via the physical uplink control channel comprises:
converting the first transmission power into a first amplitude adjustment value and converting the current transmission power into a second amplitude adjustment value;
performing amplitude adjustment on a reference signal part of the uplink signal generated by the physical layer by using the first amplitude adjustment value, and performing amplitude adjustment on a data signal part of the uplink signal generated by the physical layer by using the second amplitude adjustment value;
Transmitting the uplink signal subjected to amplitude adjustment to the gateway station through the physical uplink control channel; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
6. A power control apparatus for a channel, comprising:
the first calculation unit is used for calculating the current transmitting power of the physical uplink control channel before the uplink signal is transmitted through the physical uplink control channel; wherein the uplink signal includes a data signal portion and a reference signal portion;
the second calculation unit is used for calculating the first transmission power by utilizing the current transmission power; wherein the first transmit power is greater than the current transmit power;
an adjusting unit, configured to take the current transmission power as a transmission power of a data signal portion of the uplink signal, and take the first transmission power as a transmission power of a reference signal portion of the uplink signal;
the second computing unit includes:
the second calculating subunit is used for calculating the sum of the current transmitting power and the reference signal power offset value to obtain operation transmitting power; wherein the reference signal power offset value is a difference value of transmission powers of a reference signal portion and a data signal portion configured in a communication protocol;
A determining unit configured to determine a smaller value of the operational transmission power and the current maximum output power as the first transmission power by comparing magnitude relations of the operational transmission power and the current maximum output power; the current maximum output power is the maximum output power of the terminal defined on the current transmission occasion aiming at the current service cell in the communication protocol.
7. The apparatus according to claim 6, wherein the adjusting unit comprises:
a conversion unit, configured to convert the first transmission power into a first amplitude adjustment value and convert the current transmission power into a second amplitude adjustment value;
an adjusting subunit, configured to perform amplitude adjustment on a reference signal portion of the uplink signal by using the first amplitude adjustment value, and perform amplitude adjustment on a data signal portion of the uplink signal by using the second amplitude adjustment value; the transmitting power of the reference signal part after amplitude adjustment is the first transmitting power, and the transmitting power of the data signal part after amplitude adjustment is the current transmitting power.
8. An apparatus for uplink timing synchronization, comprising:
The first power calculation unit is used for calculating the current transmitting power of the physical uplink control channel before the physical uplink control channel transmits an uplink signal to the gateway station; wherein the uplink signal includes a data signal portion and a reference signal portion;
the second power calculation unit is used for calculating the first transmission power by utilizing the current transmission power; the first transmitting power is larger than the current transmitting power and meets the channel estimation requirement;
a power adjustment unit, configured to take the current transmission power as a transmission power of a data signal portion of the uplink signal, and take the first transmission power as a transmission power of a reference signal portion of the uplink signal;
a transmitting unit, configured to transmit the uplink signal to the gateway station through the physical uplink control channel;
the receiving unit is used for receiving the time adjustment command issued by the gateway station; the time adjustment command is obtained by processing a time offset value estimated according to the uplink signal by the gateway station;
and the time adjustment unit is used for adjusting the uplink transmission time according to the time adjustment command.
9. A control apparatus, characterized by comprising:
one or more processors;
a memory having one or more programs stored thereon;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-2.
10. A terminal, comprising:
a communication component; one or more processors; a memory having one or more programs stored thereon;
when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 3 to 5;
wherein: the one or more processors transmit an uplink signal from the communication component to a gateway station via a physical uplink control channel and receive a time adjustment command issued by the gateway station via the communication component.
11. A computer readable medium, characterized in that a computer program is stored thereon, wherein the program, when executed by a processor, implements the method according to any of claims 1 to 2 or the method according to any of claims 3 to 5.
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| CN107889209A (en) * | 2016-09-29 | 2018-04-06 | 华为技术有限公司 | The method and terminal device of a kind of Power Control |
| CN111083773A (en) * | 2019-10-12 | 2020-04-28 | 中兴通讯股份有限公司 | Power control method and device, and uplink transmission sending method and device |
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| US9313744B2 (en) * | 2011-10-28 | 2016-04-12 | Qualcomm Incorporated | Method and apparatus for configuring traffic-to-pilot power ratios in heterogeneous networks |
| CN109151970B (en) * | 2017-06-16 | 2023-10-20 | 华为技术有限公司 | Method for determining transmission power, processing chip and communication equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107889209A (en) * | 2016-09-29 | 2018-04-06 | 华为技术有限公司 | The method and terminal device of a kind of Power Control |
| CN111083773A (en) * | 2019-10-12 | 2020-04-28 | 中兴通讯股份有限公司 | Power control method and device, and uplink transmission sending method and device |
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