CN112188602A - Power control method and communication equipment - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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Abstract
The embodiment of the invention provides a power control method and equipment, wherein the method comprises the following steps: determining a first transmission power according to at least one of a distance from a first communication device to at least one second communication device, a path loss from the first communication device to the at least one second communication device, an altitude of the first communication device, and a high-layer configuration parameter; the transmit power of the first communication device is not greater than the first transmit power. In the embodiment of the invention, the severe intersystem interference of the ATG system to the ground cellular system can be avoided.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a power control method and a communications device.
Background
Referring to fig. 1a, the air to Air (ATG) communication technology utilizes a mature land mobile communication technology, such as the fourth generation communication technology (4)thgeneration, 4G), fifth generation communication technology (5)thgeneration, 5G), etc., a private base station with an antenna capable of covering the sky is built on the ground, a private network with ground-air stereo coverage is built, high-altitude stereo coverage is effectively solved, and ground-air data transmission is realized.
Compared with a ground network, the ATG network needs to support an overlarge coverage radius, such as 100-300 kilometers (km), and the coverage radius of 100km needs to be supported for inland regions, so that the number of ATG base stations is reduced, and the network deployment cost is reduced; for the gulf area, the ATG network needs to support a coverage radius of 300km in order for the terrestrial base stations to cover the air above the gulf.
In the prior art, in order to save spectrum resources, the ATG system and the terrestrial cellular communication system use the same or adjacent operating frequency, for example: both the ATG system and the ground system use 4.9GHz frequency points, and then serious intersystem interference is generated between the ATG system and the ground cellular system.
Disclosure of Invention
The embodiment of the invention provides a power control method and communication equipment, which solve the problem that serious intersystem interference is generated between an ATG system and a ground cellular system.
According to a first aspect of the embodiments of the present invention, there is provided a power control method applied to a first communication device, the method including:
determining a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a high-layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
Optionally, the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the transmission power P of the first communication deviceULNot more than the first transmission power PMAXThe method comprises at least one determination method as follows:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power); pMAX,1Representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmitting power of the first communication device is not greater than the first transmitting power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
PUSCH、PUCCH、SRS、PRACH。
optionally, the determining a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter includes:
determining the first transmit power P according to at least one of the following formulasMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the first communication device and the second communication deviceDistance of at least one second communication device, PL representing the path loss of said first communication device to said at least one second communication device, f (d) representing a function of the distance d of said first communication device from said at least one second communication device, P0And α is a high layer configuration parameter.
Optionally, the determining a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter includes:
determining a second transmit power of the first communication device per unit of frequency domain resources based on at least one of a distance of the first communication device from the at least one second communication device, a path loss of the first communication device to the at least one second communication device, and an expected level of interference experienced by the at least one second communication device per unit of frequency domain resources;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
Optionally, the determining the first transmission power according to the second transmission power of the first communication device on the unit frequency domain resource and the frequency domain resource size of the transmission signal includes:
determining the first transmit power P according to at least one of the following formulasMAX:
Wherein,for the first communication deviceSecond transmission power, N, on a unit frequency domain resourceUnitBWMu is a subcarrier spacing configuration parameter for the number of unit frequency domain resources contained in the transmitted signal.
Optionally, the determining a second transmit power of the first communication device on a unit frequency domain resource according to at least one of a distance of the first communication device from the at least one second communication device, a path loss of the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device on the unit frequency domain resource comprises:
determining a second transmit power of the first communication device on a unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P'0And α is a high layer configuration parameter.
Optionally, the method further comprises:
and determining the distance from the first communication device to the at least one second communication device according to at least one of the height of the first communication device and the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the determining the distance from the first communication device to the at least one second communication device according to at least one of the height of the first communication device and the distance from the projection point of the first communication device on the ground to the at least one second communication device includes:
determining a distance d of the first communication device from the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the method further comprises:
determining the path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and carrier frequency.
Optionally, the determining, according to preset parameters and a carrier frequency, a path loss from the first communication device to the at least one second communication device and/or the function f (d) includes:
determining a path loss, PL, of the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are all preset parametersNumber fcIs the carrier frequency.
Alternatively, P0、P′0And at least one of α is pre-agreed or configured for higher layer signaling.
Optionally, the method further comprises:
receiving P from the third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to DCI, wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
According to a second aspect of the embodiments of the present invention, there is provided a power control method applied to a third communication device, where the method includes:
determining P0、P′0And α;
sending P to a first communication device0、P′0And α;
alternatively, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, said determining P0、P′0And α, comprising:
determining P according to the average or worst detection sensitivity of the ground network in the cell coverage area or the average or worst detection sensitivity of the ground network right below the first communication equipment in a preset time period0、P′0And α.
Optionally, the sending P to the first communication device0、P′0And α, comprising:
sending P to a first communication device through higher layer signaling0、P′0And alpha.
Optionally, the method further comprises:
sending DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
Optionally, the method further comprises:
and determining the first indication information according to the average or worst detection sensitivity of the ground network within the coverage area of the cell or the average or worst detection sensitivity of the ground network right below the first communication device within a preset time period.
According to a third aspect of embodiments of the present invention, there is provided a first communication device including: a first transceiver and a first processor, wherein,
the first processor is configured to determine a first transmit power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
Optionally, the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the first processor is configured to determine the first transmit power P according to at least one of the following methodsMAXThe method comprises the following steps:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power); pMAX,1Representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmitting power of the first communication device is not greater than the first transmitting power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
PUSCH、PUCCH、SRS、PRACH。
optionally, the first processor, furtherFor determining the first transmit power P according to at least one of the following formulasMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P0And α is a high layer configuration parameter.
Optionally, the first processor is further configured to determine a second transmit power of the first communication device on a unit frequency domain resource according to at least one of a distance between the first communication device and the at least one second communication device, a path loss of the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device on the unit frequency domain resource;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
Optionally, the first processor is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
Wherein,for a second transmission power, N, of the first communication device on a unit frequency domain resourceUnitBWMu is a subcarrier spacing configuration parameter for the number of unit frequency domain resources contained in the transmitted signal.
Optionally, the first processor is further configured to determine a second transmit power of the first communication device per unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P'0And α is a high layer configuration parameter.
Optionally, the first processor is further configured to determine a distance from the first communication device to the at least one second communication device according to at least one of a height of the first communication device and a distance from a projected point of the first communication device on the ground to the at least one second communication device.
Optionally, the first processor is further configured to determine a distance d between the first communication device and the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the first processor is further configured to determine a path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and a carrier frequency.
Optionally, the first processor is further configured to determine a path loss PL of the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
Alternatively, P0、P′0And at least one of α is pre-agreed or configured for higher layer signaling.
Optionally, the first transceiver is configured to receive P from the third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to Downlink Control Information (DCI), wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
According to a fourth aspect of the embodiments of the present invention, there is provided a first communication apparatus including:
the first determining module is configured to determine a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher-layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
Optionally, the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the first determining module is configured to determine the first transmit power P according to at least one of the following methodsMAXThe method comprises the following steps:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power); pMAX,1Representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmitting power of the first communication device is not greater than the first transmitting power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
PUSCH、PUCCH、SRS、PRACH。
optionally, the first determining module is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the distance between the first communication device and the at least one second communication device, PL represents the path loss from the first communication device to the at least one second communication device, P0(d) representing the distance d of the first communication device from the at least one second communication deviceAs a function of (c).
Optionally, the first determining module is further configured to determine a second transmit power of the first communication device on a unit frequency domain resource according to at least one of a distance between the first communication device and the at least one second communication device, a path loss from the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device on the unit frequency domain resource;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
Optionally, the first determining module is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
Wherein,for a second transmission power, N, of the first communication device on a unit frequency domain resourceUnitBWMu is a subcarrier spacing configuration parameter for the number of unit frequency domain resources contained in the transmitted signal.
Optionally, the first determining module is further configured to determine a second transmission power of the first communication device on a unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance between the first communication device and the at least one second communication device, and PL represents the path loss from the first communication device to the at least one second communication device, P'0F (d) represents a function of the distance d of the first communication device from the at least one second communication device for the level of interference expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the first determining module is further configured to determine a distance from the first communication device to the at least one second communication device according to at least one of a height of the first communication device and a distance from a projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the first determining module is further configured to determine a distance d between the first communication device and the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the first determining module is further configured to determine, according to preset parameters and a carrier frequency, a path loss from the first communication device to the at least one second communication device and/or the function f (d).
Optionally, the first determining module is further configured to determine a path loss PL from the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
Alternatively, P0、P′0And at least one of α is pre-agreed or configured for higher layer signaling.
Optionally, the first communication device further comprises: a first receiving module for receiving P from the third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to Downlink Control Information (DCI), wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
According to a fifth aspect of the embodiments of the present invention, there is provided a third communication apparatus including: a second transceiver and a second processor, wherein,
the second processor for determining P0、P′0And α;
the second transceiver is used for transmitting P to the first communication equipment0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
OptionallyThe second processor is further configured to determine P according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period0、P′0And α.
Optionally, the second transceiver is further configured to transmit P to the first communication device through higher layer signaling0、P′0And α;
the second transceiver is further configured to send DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
Optionally, the second processor is further configured to determine the first indication information according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period.
According to a sixth aspect of the embodiments of the present invention, there is provided a third communication device including:
a second determining module for determining P0、P′0And α;
a first sending module for sending P to the first communication device0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the second determining module is further configured to determine P according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period0、P′0And α.
Optionally, the first sending module is further configured to send P to the first communication device through higher layer signaling0、P′0And α;
the first sending module is further configured to send DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
Optionally, the second determining module is further configured to determine the first indication information according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period.
According to a seventh aspect of embodiments of the present invention, there is provided a communication device, comprising a processor, a memory, and a program stored on the memory and executable on the processor, the program implementing the steps of the power control method according to the first aspect or the steps of the power control method according to the second aspect when executed by the processor.
According to an eighth aspect of embodiments of the present invention, there is provided a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps of the power control method according to the first aspect, or the steps of the power control method according to the second aspect.
In the embodiment of the invention, the first transmission power is determined according to at least one of the distance from the first communication device to the at least one second communication device, the path loss from the first communication device to the at least one second communication device, the altitude of the first communication device and a high-layer configuration parameter. And controlling the uplink transmission power of the first communication equipment by the first transmission power to avoid serious intersystem interference of the ATG system to the ground cellular system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1a is a schematic diagram of an ATG network;
FIG. 1b is a second schematic diagram of the architecture of the ATG network;
fig. 2 is a flowchart illustrating a power control method according to an embodiment of the invention;
fig. 3 is a second flowchart of a power control method according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a first communication device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third communication device according to an embodiment of the present invention;
fig. 6 is a second schematic structural diagram of a first communication device according to an embodiment of the present invention;
fig. 7 is a second schematic structural diagram of a third communication device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiments of the present invention, words such as "exemplary" or "for example" are used to mean serving as examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "e.g.," an embodiment of the present invention is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
The technology described herein is not limited to a 5th-generation (5G) system and a later-evolution communication system, and is not limited to an LTE/LTE evolution (LTE-a) system, and may also be used for various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems.
Referring to fig. 1, an architecture of an ATG network is shown, in which a distance between an ATG airborne terminal, i.e., an airborne Customer Premise Equipment (CPE) 11 and an ATG base station 12 is far from a disturbed ground system (i.e., a ground base station 13 or a ground terminal 14 of an intra-frequency or adjacent-frequency network), for example: a typical flying height of a civil aircraft is 6000m to 12000m, i.e. the distance of the onboard CPE11 from the ground base station 13 is about 10km, while at the cell coverage radius of the ATG base station 12 (assuming a radius of 100km), the distance of the onboard CPE11 from the ATG base station 12 is about 100 km.
In the interference of the ATG system to the ground cellular system, there is an interference scenario in which Uplink (UL) transmission of the ATG system interferes with uplink and downlink of the ground cellular system.
In order to solve the interference problem in the interference scenario, the prior art provides an UL open-loop power control scheme, which determines the UL signal transmission power according to the path loss from the terminal UE to the main serving cell, that is:
wherein, P0Indicating the expected received power of the primary serving base station in decibel relative to one milliwatt (dBm) per Resource Block (RB); PL denotes the path of the UE to the primary serving cellThe path loss value in dB;represents the target transmit power of the UL on each RB in dBm.
Actual transmission power P of each UEULByUL signal bandwidth (M)RB) UE maximum allowed transmit power (P)CMAX) And some closed-loop power control parameters (f (i)) are jointly determined, namely:
wherein, PCMAXAre the key UE capability parameters.
An embodiment of the present invention provides a power control method, where an execution subject of the method is a first communication device (hereinafter, may be referred to as UE), the first communication device is a communication device deployed at a terminal side in an ATG network, the first communication device may be a mobile phone, an onboard CPE, a relay node of an Integrated Access and Backhaul (IAB ), or the like, and the first communication device may be installed on a carrier device such as an airplane, an automobile, a train, or the like.
Referring to fig. 2, the method comprises the following specific steps:
step 201: determining a first transmission power according to at least one of a distance from a first communication device to at least one second communication device, a path loss from the first communication device to the at least one second communication device, an altitude of the first communication device, and a high-layer configuration parameter;
in an embodiment of the present invention, the transmission power of the first communication device is not greater than the first transmission power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
There is no communication link between the first communication device and the at least one second communication device, which means physically that the at least one second communication device sees the signal transmitted by the first communication device as interference, i.e. the first communication device is the source of interference for the at least one second communication device. The first communication device may be an on-board CPE11 in the architecture shown in fig. 1 and the at least one second communication device may be a ground terminal 14 in the architecture shown in fig. 1.
Optionally, the higher layer configuration parameters include P0、P′0And α;
wherein, P0Is the interference level, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for the interference level expected to be experienced by at least one second communications device on a unit frequency-domain resource.
In one embodiment, α is a non-negative number, the physical meaning of α being the path loss compensation coefficient.
In one embodiment, to avoid interference to other cells by the onboard CPE, an intuitive approach is: is suitably arranged<P0,α>Parameter(s) ofWherein, TinterfIndicating a certain interference threshold.
For example: for the users at the edge of cell coverage, the open-loop power control parameters are set according to the following formula<P0,α>:
It is clear that,
that is, in order to ensure that the UL transmit power of the onboard CPE at the edge of the ATG cell does not cause strong interference to the ground network, the UL performance of the entire ATG network needs to be reduced forcibly, so that the UL transmit power of the onboard CPE at the center of the ATG cell is very low, and the UL performance of the ATG network is seriously affected and deteriorated. Therefore, there is a need to provide a power control scheme that can effectively improve the UL performance of the ATG network itself while avoiding strong interference to the terrestrial network caused by the onboard CPE.
The transmission power P of the first communication deviceULNot more than the first transmission power PMAXThe determination may be made by at least one of:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power);
PMAX,1representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmission power of the first communication device is not greater than the first transmission power, further comprising: the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel comprising at least: a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), a Channel Sounding Reference Signal (SRS), and a Physical Random Access Channel (PRACH).
In summary, P is defined by the inventionMAXIs the maximum transmit power of the first communication device. The scheme does not limit the terminal to transmit the first transmission power P in the schemeMAXAnd determining the specific expression mode of the maximum value of the transmitting power of the terminal.
In addition, P isMAX,1The transmission power obtained by the existing uplink power control method is determined according to the path loss from the first communication equipment to the service cell of the first communication equipment, and the calculated transmission power is recorded as P in the embodiment of the inventionMAX,1. It can be understood that PMAX,1But only one representation of the transmit power, which may also be represented in other forms, such as PPUSCH,b,f,c(i,j,qd,l)、PPUCCH,b,f,c(i,qu,qd,l)、PSRS,b,f,c(i,qs,l)、PPRACH,b,f,c(i) And the embodiment of the present invention is not particularly limited thereto.
Specifically, in the prior art, the power control method for different signals and/or channels according to the transmission power determined by the path loss from the first communication device to the serving cell of the first communication device is as follows:
the transmit power for PUSCH is determined by the following equation:
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power), which is defined as a UE capability parameter; pO_PUSCH,b,f,c(j) Is PO_NOMINAL_PUSCH,b,f,c(j) And PO_UE_PUSCH,b,f,c(j) Sum of PO_NOMINAL_PUSCH,b,f,c(j) And PO_UE_PUSCH,b,f,c(j) Configured by a higher layer; alpha is alphab,f,c(j) Configuring or taking the value of 1 by a high layer;is the bandwidth of the PUSCH resource, i.e. the number of RBs; PLb,f,c(qd) Is the downlink path loss estimation from the UE to its main serving cell; deltaTF,b,f,c(i) Configured by higher layers.
The transmit power for the PUCCH is determined by the following formula:
wherein, PCMAX,f,c(i) Is the configured UE transmit power, defined as a UE capability parameter; pO_PUCCH,b,f,c(qu) To provide p0-nominalTime PO_NOMINAL_PUCCHSum, or no provision of p0-nominalTime PO_NOMINAL_PUCCH=0;Is the bandwidth of the PUCCH resource, i.e. the number of RBs; PLb,f,c(qd) Is the downlink path loss estimation from the UE to its main serving cell; deltaTF,b,f,c(i) Configured by higher layers.
The transmit power for the SRS is determined by the following equation:
wherein, PCMAX,f,c(i) Is the configured UE transmit power, defined as a UE capability parameter; when p is0When not provided, PO_SRS,b,f,c(qs)=PO_NOMINAL_PUSCH(0);MSRS,b,f,c(i) Is the bandwidth of the SRS, i.e., the number of RBs; PLb,f,c(qd) Is the downlink path loss estimation from the UE to its main serving cell; alpha is alphaSRS,b,f,c(qs) Configured by a higher layer; h isb.f.c(i, l) is configured by higher layers.
The transmit power for the PRACH is determined by the following equation:
PPRACH,b,f,c(i)=min{PCMAX,f,c(i),PPRACH,target,f,c+PLb,f,c}
wherein, PCMAX,f,c(i) Is the configured UE transmit power, defined as a UE capability parameter; pPRACH,target,f,cThe PRACH target receiving power is configured by a high layer; PLb,f,cIs the downlink path loss estimate of the UE to its primary serving cell.
Further, the embodiment of the present invention provides two specific ways for the first communication device to determine the first transmit power in the two scenarios:
scene one: for signals or channels with a fixed transmission bandwidth, e.g. PRACH, etc., the first communication device directly determines the first transmission power PMAX;
In particular, a first transmission power P of the first communication device is determined according to at least one of the following formulasMAX:
PMAX=P0 (1.1);
PMAX=P0+PL (1.2);
PMAX=P0+f(d) (1.3);
PMAX=P0+α·f(d) (1.4);
Wherein d is the distance between the first communication device and the at least one second communication device, PL represents the path loss from the first communication device to the at least one second communication device, P0Is at least thatAn interference level to which a second communication device is expected to be exposed, f (d) a function representing the distance d of said first communication device from said at least one second communication device.
The above equations are all expressed in dB, for example: pMAXAnd P0Unit of dBw or dBm; the unit of f (d) is dB; α is a dimensionless constant.
In the formula (1.3) and the formula (1.4), P0Representing the interference level expected to be experienced by at least one disturbed second communication device on the ground.
In some embodiments, α ≧ 1 is used for adjustment of transmit power.
Scene two: for signals or channels with variable transmission bandwidth, such as PUSCH, PUCCH, SRS and the like, the first communication device determines the second transmission power of the unit frequency domain resource first, and then determines the first transmission power P after the given frequency domain resourceMAX;
Specifically, the first communication device determines a first transmission power PMAXThe method comprises the following substeps:
(1) determining a second transmission power of the first communication device on the unit frequency domain resource according to the distance between the first communication device and at least one second communication device, the path loss of the first communication device to the at least one second communication device and the interference level expected to be suffered by the at least one second communication device on the unit frequency domain resource;
(2) determining first transmission power of the first communication equipment according to second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal;
further, a first transmit power P of the first communication device is determined according to at least one of the following formulasMAX:
A second transmit power, expressed in dB, for the first communication device on the unit frequency domain resource; n is a radical ofUnitBWμ is a Subcarrier spacing configuration (Subcarrier spacing configuration) parameter for the number of unit frequency domain resources included in the transmission signal, and optionally, the Subcarrier spacing is Δ f-2μ·15[kHz]。
In one embodiment, the unit frequency domain resource is an RB.
In another embodiment, the unit frequency domain resource is an RE.
In another embodiment, the unit frequency domain resource is an RB set including at least one RB, and different RBs may be continuous or discrete in the frequency domain.
In another embodiment, the unit frequency-domain resource is a RE set including at least one RE, and different REs may be continuous or discrete in the frequency domain.
Further, a second transmit power of the first communication device on the unit frequency domain resource is determined according to at least one of the following formulas
Wherein d is the distance between the first communication device and the at least one second communication device, and PL represents the path loss from the first communication device to the at least one second communication device, P'0F (d) represents a function of the distance d of the first communication device from the at least one second communication device for the level of interference expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the distance d between the first communication device and the second communication device is determined according to at least one of the following formulas:
d=h1 (4.1);
wherein h is1The height of the first communication device from the ground is defined as l, and the distance from the projection point of the first communication device on the ground to the second communication device is defined as l.
In the embodiment of the present invention, for the ATG scenario, when there are a large number of second communication devices on the ground, one implementation is to use the formula (4.1), where h is1The height of the first communication device from the ground, for example: flying height of the aircraft, d ═ h1The physical meaning of (1) is the minimum distance from the first communication device to any second communication device on the ground;
another embodiment is to use formula (4.2), where l is the minimum plane distance from the projection point of the first communication device on the ground to the second communication device, and is the parameter of the configuration. For example, if the operator can ensure that no second communication device is present within at least l units of distance around the projected point (straight line or curved line) of the aircraft flight path on the ground in a certain area, the distance d between the first communication device and the at least one second communication device can be determined according to equation (4.2).
When l > 0, the distance d determined by equation (4.2) is larger than that of equation (4.1), which means that the generation of a severe interference to the terrestrial communication system is avoidedUnder the condition of heavy interference, the first transmission power P allowed to be adopted by the first communication equipmentMAXThe value of (a) may be larger, that is, the uplink transmit power limit corresponding to the formula (4.2) is looser.
Further, based on the preset parameters and the carrier frequency, determining the path loss and/or the function f (d) from the first communication device to the at least one second communication device, namely:
determining a path loss PL of the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
The physical meaning of f (d) above is the magnitude of the path loss in dB for a propagation distance d.
In one embodiment, a is 32.45, b is 20, c is 20, and f iscIn GHz.
Alternatively, P0、P′0And at least one of alpha is pre-agreed or configured by high-layer signaling, and the pre-agreement indicates that P is pre-stored in the first communication equipment0、P′0And alpha.
In particular, in one embodiment, P is received from the third communication device via higher layer signaling0、P′0And an alpha configuration.
A communication link exists between a first communication device, which may be an on-board CPE11 in the architecture shown in fig. 1, and a third communication device, which may be an ATG base station 12 in the architecture shown in fig. 1, and in a specific embodiment, the third communication device is a serving base station of the first communication device.
In another embodiment, P is received from the third communication device via higher layer signaling0、P′0And alphaValue collection; and determining parameter values from the value set according to Downlink Control Information (DCI).
The higher layer signaling may be a system message, Radio Resource Control (RRC) configuration, and the like, and the DCI may be an SRS Resource Indicator (SRI).
In at least one of the above embodiments, the third communication device is a communication device deployed on a network side in the ATG network. For example, the third communication device is an ATG base station and is also a primary serving base station or a primary serving cell of the first communication device.
In the embodiment of the invention, the first transmission power is determined according to at least one of the distance from the first communication equipment to the at least one second communication equipment, the path loss from the first communication equipment to the at least one second communication equipment, the height of the first communication equipment and high-layer configuration parameters, and the uplink transmission power of the first communication equipment is controlled by the first transmission power, so that the ATG system is prevented from generating serious intersystem interference on the ground cellular system.
An embodiment of the present invention provides a power control method, where an execution subject of the method is a third communication device, and the third communication device is a communication device deployed on a network side in an ATG network.
Referring to fig. 3, the method comprises the following specific steps:
step 301: determining P0、P′0And α;
step 302: sending P to a first communication device0、P′0And α;
in an embodiment of the invention, the third communication device has a communication link with the first communication device, the configuration parameter is indicative of an interference level expected to be experienced by the at least one second communication device, and the first communication device is an interference source of the at least one second communication device.
There is no communication link between the first communication device and the at least one second communication device, which means physically that the at least one second communication device sees the signal transmitted by the first communication device as interference, i.e. the first communication device is the source of interference for the at least one second communication device. The first communication device may be an on-board CPE11 in the architecture shown in fig. 1, the at least one second communication device may be a ground terminal 14 in the architecture shown in fig. 1,
a communication link exists between a first communication device, which may be an on-board CPE11 in the architecture shown in fig. 1, and a third communication device, which may be an ATG base station 12 in the architecture shown in fig. 1, and in a specific embodiment, the third communication device is a serving base station of the first communication device.
The third communication device determines P0、P′0And a value set of at least one of a, wherein P0Is the interference level, P ', expected to be experienced by the second communications device'0α is a high-level configuration parameter for the interference level expected to be experienced by the second communication device on a unit frequency-domain resource.
In one embodiment, α is a non-negative number, the physical meaning of α being the path loss compensation coefficient.
Further, the third communication device determines P according to the average or worst detection sensitivity of the ground network within the cell coverage area, or the average or worst detection sensitivity of the ground network directly below the first communication device within a preset time period0、P′0And α.
Further, the third communication device transmits P to the first communication device through higher layer signaling0、P′0And a value set of at least one of a; and sending DCI to the first communication equipment, wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication equipment to determine a parameter value from a value set.
Further, the third communication device determines the first indication information according to an average or worst detection sensitivity of the terrestrial network within the cell coverage area, or an average or worst detection sensitivity of the terrestrial network directly below the first communication device within a preset time period.
In the embodiment of the invention, the third communication equipment determines the configuration parameters and sends the configuration parameters to the first communication equipment, the first communication equipment determines the maximum transmitting power of the first communication equipment, and the uplink transmitting power of the first communication equipment is controlled by the maximum transmitting power, so that the severe intersystem interference of the ATG system to the ground cellular system is avoided.
The power control method of the embodiment of the present invention is compared with the power control method of the prior art with reference to a specific application scenario, wherein, assuming that the interference level expected to be received by the terrestrial network is less than-100 dBm/15kHz, and a subcarrier interval of 15kHz is adopted, the interference level expected to be received on each RB is less than-89.2 dBm.
According to the free space channel model:
FSPL(d3D,fc)=32.45+20log10(d3D)+20log10(fc);
the path loss for a distance of 10km is 126dB, and the path loss for a distance of 100km is 146 dB.
When the height of the airplane is 10km, the maximum interference on the ground is required to be less than-89.2 dBm/RB, so that the emission power of the airplane is less than-89.2 dBm/RB +126dB or 36.8dBm/RB from the interference perspective.
From the perspective of the onboard CPE to the service ATG base station thereof, the open-loop power control parameter is set as<P0=-86dBm/Hz,α=0.9>。
For cell-centric on-board CPE, its UL transmit power on each RB should be:
P0+α·PL=-86dBm+0.9*126=27.4dBm;
for cell-edge on-board CPE, its UL transmit power on each RB should be:
P0+α·PL=-86dBm+0.9*146=45.4dBm;
the analysis is carried out in three examples:
example one, only support uplink open loop power control, and adopt typical open loop power control parameters<P0=-86dBm/Hz,α=0.9>The method of the embodiment of the invention is not adopted;
for cell-centered on-board CPE, its UL transmit power on each RB is-86 dBm +0.9 × 126 — 27.4 dBm;
for cell-edge on-board CPEs, its UL transmit power on each RB is-86 dBm +0.9 × 146-45.4 dBm > 36.8 dBm;
therefore, the onboard CPEs at the cell edge will cause too strong interference to the terrestrial network.
Example two, only uplink open-loop power control is supported, but open-loop power control parameters are adjusted to avoid interference to a ground network, and the method of the embodiment of the present invention is not adopted;
for cell-edge on-board CPE, requiring UL transmit power < 36.8dBm on each RB, the power control parameters can be set to: p0-86dBm- (45.4dBm-36.8dBm) -94.6dBm, α still 0.9, then:
for cell-centered on-board CPE, its UL transmit power on each RB is-94.6 dBm +0.9 × 126 ═ 18.8 dBm; neglecting the antenna gain, the received power of the ATG base station on each RB is 18.8dBm-126 dB-107.2 dBm;
for cell-edge on-board CPE, its UL transmit power on each RB is-94.6 dBm +0.9 × 146 ═ 36.8 dBm; ignoring the antenna gain, the received power at each RB by the ATG base station is 36.8dBm-146 dB-109.2 dBm.
Example three, a method for simultaneously supporting uplink open-loop power control and a method according to an embodiment of the present invention are provided, and typical open-loop power control parameters are adopted<P0=-86dBm/Hz,α=0.9>;
For cell-centered on-board CPE, its UL transmit power on each RB is min {27.4dBm, 36.8dBm } — 27.4 dBm; neglecting the antenna gain, the received power of the ATG base station on each RB is 27.4dBm-126 dB-98.6 dBm;
for cell-edge on-board CPEs, its UL transmit power on each RB is min {45.4dBm, 36.8dBm } — 36.8 dBm. Ignoring the antenna gain, the received power at each RB by the ATG base station is 36.9dBm-146 dB-109.2 dBm.
Comparing the three examples, it can be found that the first example can not meet the requirement of avoiding the interference to the ground system; the second example and the third example can both meet the requirement of avoiding interference to a ground system, and for the airborne CPE at the edge of the cell, the UL signal power received by the ATG base station is the same and is-109.2 dBm/RB; however, for the airborne CPE at the cell center, the UL signal power received by the ATG base station in the second example is-107.2 dBm/RB, and the UL signal power received by the ATG base station in the third example is-98.6 dBm, which is seen in that the UL signal power received by the ATG base station in the third example is 8.6dB higher than that received by the ATG base station in the second example, so that compared with the existing scheme, the UL transmission performance of the airborne CPE at the center or the good point of the ATG cell can be effectively improved by using the method of the embodiment of the present invention while the interference of the airborne CPE on the ground network is also avoided, and therefore, the UL performance of the ATG network itself can be.
Referring to fig. 4, an embodiment of the present invention provides a first communication device 400, including: a first transceiver 401 and a first processor 402, wherein,
the first processor 402, configured to determine a first transmit power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
Optionally, the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the firstA processor 402 configured to determine the first transmit power P according to at least one ofMAXThe method comprises the following steps:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power); pMAX,1Representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmitting power of the first communication device is not greater than the first transmitting power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
PUSCH、PUCCH、SRS、PRACH。
optionally, the first processor 402 is further configured to perform at least one ofDetermining the first transmit power P according to a formulaMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P0And α is a high layer configuration parameter.
Optionally, the first processor 402 is further configured to determine a second transmit power of the first communication device on a unit frequency domain resource according to at least one of a distance between the first communication device and the at least one second communication device, a path loss from the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device on the unit frequency domain resource;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
Optionally, the first processor 402 is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
Wherein,for the first communicationSecond transmission power, N, of the device on the unit frequency domain resourceUnitBWMu is a subcarrier spacing configuration parameter for the number of unit frequency domain resources contained in the transmitted signal.
Optionally, the first processor 402 is further configured to determine a second transmission power of the first communication device on a unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P'0And α is a high layer configuration parameter.
Optionally, the first processor 402 is further configured to determine a distance from the first communication device to the at least one second communication device according to at least one of a height of the first communication device and a distance from a projected point of the first communication device on the ground to the at least one second communication device.
Optionally, the first processor 402 is further configured to determine a distance d between the first communication device and the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the first processor 402 is further configured to determine a path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and a carrier frequency.
Optionally, the first processor 402 is further configured to determine a path loss PL from the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
Alternatively, P0、P′0And at least one of α is pre-agreed or configured for higher layer signaling.
Optionally, the first transceiver is configured to receive P from the third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to Downlink Control Information (DCI), wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
In the embodiment of the invention, the maximum transmitting power of the first communication equipment is determined according to the distance between the first communication equipment and at least one second communication equipment and/or the configuration parameters received from the third communication equipment, and the uplink transmitting power of the first communication equipment is controlled through the maximum transmitting power, so that the severe intersystem interference of an ATG system to a ground cellular system is avoided.
Referring to fig. 5, an embodiment of the present invention provides a third communications device 500, including: a second transceiver 501 and a second processor 502;
wherein the second processor 502 is configured to determine P0、P′0And α;
the second transceiver 501 is used for transmitting P to the first communication device0、P′0And α;
alternatively, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the second processor 502 is further configured to determine P according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period0、P′0And α.
Optionally, the second transceiver 501 is further configured to transmit P to the first communication device through higher layer signaling0、P′0And α;
the second transceiver 501 is further configured to send DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
Optionally, the second processor 502 is further configured to determine the first indication information according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period.
In the embodiment of the invention, the third communication equipment determines the configuration parameters and sends the configuration parameters to the first communication equipment, the first communication equipment determines the maximum transmitting power of the first communication equipment, and the uplink transmitting power of the first communication equipment is controlled by the maximum transmitting power, so that the severe intersystem interference of the ATG system to the ground cellular system is avoided.
Referring to fig. 6, an embodiment of the present invention provides a first communication device 600, including:
the first determining module 601 is configured to determine a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher-layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
Optionally, the at least one second communication device has at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
Optionally, the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the first determining module 601 is configured to determine the first transmit power P according to at least one of the following methodsMAXThe method comprises the following steps:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is configured UE transmit power (configured UE transmit power); pMAX,1Representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
Optionally, the transmitting power of the first communication device is not greater than the first transmitting power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
PUSCH、PUCCH、SRS、PRACH。
optionally, the first determining module 601 is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P0And α is a high layer configuration parameter.
Optionally, the first determining module 601 is further configured to determine a second transmit power of the first communication device on a unit frequency domain resource according to at least one of a distance between the first communication device and the at least one second communication device, a path loss from the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device on the unit frequency domain resource;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
Optionally, the first determining module 601 is further configured to determine the first transmit power P according to at least one of the following formulasMAX:
Wherein,for a second transmission power, N, of the first communication device on a unit frequency domain resourceUnitBWMu is a subcarrier spacing configuration parameter for the number of unit frequency domain resources contained in the transmitted signal.
Optionally, the first determining module 601 is further configured toDetermining a second transmit power of the first communication device on a unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P'0And α is a high layer configuration parameter.
Optionally, the first determining module 601 is further configured to determine a distance from the first communication device to the at least one second communication device according to at least one of a height of the first communication device and a distance from a projected point of the first communication device on the ground to the at least one second communication device.
Optionally, the first determining module 601 is further configured to determine the distance d between the first communication device and the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
Optionally, the first determining module 601 is further configured to determine a path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and a carrier frequency.
Optionally, the first determining module 601 is further configured to determine a path loss PL from the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
Alternatively, P0、P′0And at least one of α is pre-agreed or configured for higher layer signaling.
Optionally, the first communication device further comprises: a first receiving module for receiving P from the third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to Downlink Control Information (DCI), wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
In the embodiment of the invention, the maximum transmitting power of the first communication equipment is determined according to the distance between the first communication equipment and at least one second communication equipment and/or the configuration parameters received from the third communication equipment, and the uplink transmitting power of the first communication equipment is controlled through the maximum transmitting power, so that the severe intersystem interference of an ATG system to a ground cellular system is avoided.
Referring to fig. 7, another third communication device 700 according to an embodiment of the present invention includes:
a second determining module 701 for determining P0、P′0And α;
a first sending module 702 for sending P to the first communication device0、P′0And α;
alternatively, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
Optionally, the second determining module 701 is further configured to determine P according to an average or worst detection sensitivity of a terrestrial network within a cell coverage area, or an average or worst detection sensitivity of a terrestrial network directly below the first communication device within a preset time period0、P′0And α.
Optionally, the first sending module 702 is further configured to send P to the first communication device through higher layer signaling0、P′0And α;
the first sending module 702 is further configured to send DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
Optionally, the second determining module 701 is further configured to determine the first indication information according to an average or worst detection sensitivity of a ground network within a cell coverage area, or an average or worst detection sensitivity of a ground network directly below the first communication device within a preset time period.
In the embodiment of the invention, the third communication equipment determines the configuration parameters and sends the configuration parameters to the first communication equipment, the first communication equipment determines the maximum transmitting power of the first communication equipment, and the uplink transmitting power of the first communication equipment is controlled by the maximum transmitting power, so that the severe intersystem interference of the ATG system to the ground cellular system is avoided.
Referring to fig. 8, an embodiment of the present invention provides a communication device 800, including: a processor 801, a transceiver 802, a memory 803, and a bus interface.
Among other things, the processor 801 may be responsible for managing the bus architecture and general processing. The memory 803 may store data used by the processor 801 in performing operations.
In this embodiment of the present invention, the communication device 800 may further include: a program stored on the memory 803 and executable on the processor 801, which when executed by the processor 801, performs the steps of the method provided by embodiments of the present invention.
In FIG. 8, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 801, and various circuits, represented by the memory 803, linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further in connection with embodiments of the present invention. The bus interface provides an interface. The transceiver 802 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the computer program implements the processes of the method embodiments, and can achieve the same technical effects, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (26)
1. A power control method applied to a first communication device, the method comprising:
determining a first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a high-layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
2. The method of claim 1, the at least one second communication device having at least one of the following features:
the at least one second communication device does not include a serving cell of the first communication device;
the at least one second communication device is interfered by the first communication device;
there is no communication link between the at least one second communication device and the first communication device.
3. The method of claim 1, wherein the higher layer configuration parameter comprises P0、P′0And α;
wherein, P0Is a level of interference, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for an interference level expected to be experienced by the at least one second communication device on a unit frequency domain resource.
4. Method according to claim 1, characterized in that the transmission power P of the first communication deviceULNot more than the first transmission power PMAXThe method comprises at least one determination method as follows:
the formula I is as follows:
the formula II is as follows:
wherein,
the formula III is as follows:
wherein,
wherein, PCMAX,f,c(i) Is the configured UE transmit power;
PMAX,1representing a transmit power determined from a path loss of the first communication device to a serving cell of the first communication device.
5. The method of claim 1, wherein the first communication device has a transmit power no greater than the first transmit power, further comprising:
the transmission power of at least one signal and/or channel of the first communication device is not greater than the first transmission power, the at least one signal and/or channel at least comprising:
a physical uplink shared channel PUSCH, a physical uplink control channel PUCCH, a channel sounding reference signal SRS and a physical random access channel PRACH.
6. The method of claim 1, wherein the determining the first transmission power according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter comprises:
determining the first transmit power P of the first communication device according to at least one of the following formulasMAX:
PMAX=P0;
PMAX=P0+PL;
PMAX=P0+f(d);
PMAX=P0+α·f(d);
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P0And α is a high layer configuration parameter.
7. The method of claim 1, wherein determining the first transmit power based on at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter comprises:
determining a second transmit power of the first communication device per unit of frequency domain resources based on at least one of a distance of the first communication device from the at least one second communication device, a path loss of the first communication device to the at least one second communication device, and an expected level of interference experienced by the at least one second communication device per unit of frequency domain resources;
and determining the first transmission power according to the second transmission power of the first communication equipment on the unit frequency domain resource and the frequency domain resource size of the transmission signal.
8. The method of claim 7, wherein the determining the first transmit power according to the second transmit power of the first communication device on a unit frequency domain resource and a frequency domain resource size of a transmitted signal comprises:
determining a first transmit power P of the first communication device according to at least one of the following formulasMAX:
9. The method of claim 7, wherein the determining the second transmit power of the first communication device over a unit frequency domain resource based on at least one of a distance of the first communication device from the at least one second communication device, a path loss of the first communication device to the at least one second communication device, and an interference level expected to be experienced by the at least one second communication device over the unit frequency domain resource comprises:
determining a second transmit power of the first communication device on a unit frequency domain resource according to at least one of the following formulas
Wherein d is the distance of the first communication device from the at least one second communication device, PL represents the path loss of the first communication device to the at least one second communication device, f (d) represents a function of the distance d of the first communication device from the at least one second communication device, P'0And α is a high layer configuration parameter.
10. The method of claim 1, further comprising:
and determining the distance from the first communication device to the at least one second communication device according to at least one of the height of the first communication device and the distance from the projection point of the first communication device on the ground to the at least one second communication device.
11. The method of claim 10, wherein determining the distance from the first communication device to the at least one second communication device based on at least one of the height of the first communication device and the distance from the first communication device to the at least one second communication device based on the projected point of the first communication device on the ground comprises:
determining a distance d of the first communication device from the at least one second communication device according to at least one of the following formulas:
d=h1;
wherein h is1And l is the distance from the projection point of the first communication device on the ground to the at least one second communication device.
12. The method according to claim 6 or 9, characterized in that the method further comprises:
determining the path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and carrier frequency.
13. The method according to claim 12, wherein the determining the path loss from the first communication device to the at least one second communication device and/or the function f (d) according to preset parameters and a carrier frequency comprises:
determining a path loss, PL, of the first communication device to the at least one second communication device according to the following formula:
PL=a+b·log10(d)+c·log10(fc);
and/or determining the function f (d) according to the formula
f(d)=a+b·log10(d)+c·log10(fc);
Wherein a, b and c are preset parameters, fcIs the carrier frequency.
14. The method of claim 3, further comprising:
receiving P from a third communication device through higher layer signaling0、P′0And a value set of at least one of a;
and determining a parameter value from the value set according to Downlink Control Information (DCI), wherein the DCI comprises first indication information, and the first indication information is used for indicating the first communication device to determine the parameter value from the value set.
15. A power control method applied to a third communication device, the method comprising:
determining P0、P′0And α;
sending P to a first communication device0、P′0And alpha.
16. The method of claim 15,
the P is0Is the level of interference to which at least one second communications device is expected to be subjected, said P'0α is a high-level configuration parameter for the interference level expected to be experienced by at least one second communications device on a unit frequency-domain resource.
17. The method of claim 15, wherein the determining P is performed by a computer system0、P′0And α, comprising:
according to the average or worst detection sensitivity of the ground network in the coverage area of the cell or the first communication equipment is positive in a preset time periodAverage or worst detection sensitivity of underlying ground network, determining P0、P′0And α.
18. The method of claim 15, wherein the sending P to the first communication device0、P′0And α, comprising:
sending P to a first communication device through higher layer signaling0、P′0And a value set of at least one of alpha.
19. The method of claim 18, further comprising:
sending DCI to the first communication device, where the DCI includes first indication information, and the first indication information is used to indicate the first communication device to determine a parameter value from the value set.
20. The method of claim 19, further comprising:
and determining the first indication information according to the average or worst detection sensitivity of the ground network within the coverage area of the cell or the average or worst detection sensitivity of the ground network right below the first communication device within a preset time period.
21. A first communications device, comprising: a first transceiver and a first processor, wherein,
the first processor is configured to determine a first transmission power of a first communication device according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a higher layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
22. A first communications device, comprising:
a first determining module, configured to determine a first transmission power of a first communication device according to at least one of a distance from the first communication device to at least one second communication device, a path loss from the first communication device to at least one second communication device, an altitude of the first communication device, and a high-layer configuration parameter;
the transmit power of the first communication device is not greater than the first transmit power.
23. A third communication device, comprising: a second transceiver and a second processor, wherein,
the second processor for determining P0、P′0And α;
the second transceiver is used for transmitting P to the first communication equipment0、P′0And α;
wherein, P0Is the interference level, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for the interference level expected to be experienced by at least one second communications device on a unit frequency-domain resource.
24. A third communication device, comprising:
a second determining module for determining P0、P′0And α;
a first sending module for sending P to the first communication device0、P′0And α;
wherein, P0Is the interference level, P ', expected to be experienced by the at least one second communications device'0α is a high-level configuration parameter for the interference level expected to be experienced by at least one second communications device on a unit frequency-domain resource.
25. A communication device comprising a processor, a memory and a program stored on the memory and executable on the processor, the program when executed by the processor implementing the steps of the power control method according to any one of claims 1 to 14 or the steps of the power control method according to any one of claims 15 to 20.
26. A computer-readable storage medium, characterized in that a computer program is stored thereon, which computer program, when being executed by a processor, carries out the steps of the power control method according to one of the claims 1 to 14 or the steps of the power control method according to one of the claims 15 to 20.
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