CN106879058B - Transmission power control method, base station and User Equipment (UE) - Google Patents

Transmission power control method, base station and User Equipment (UE) Download PDF

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CN106879058B
CN106879058B CN201510920282.1A CN201510920282A CN106879058B CN 106879058 B CN106879058 B CN 106879058B CN 201510920282 A CN201510920282 A CN 201510920282A CN 106879058 B CN106879058 B CN 106879058B
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base station
parameter
inr
snr
interference
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CN106879058A (en
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秦一平
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Zhuji Yuanchang information technology consulting service department
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Zhuji Yuanchang Information Technology Consulting Service Department
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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
    • 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
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • 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
    • 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
    • H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a transmission power control method, a base station and User Equipment (UE), which can simultaneously improve the average throughput rate and the edge throughput rate of a service cell through power control. The method provided by the embodiment of the invention comprises the following steps: a first base station receives uplink data sent by User Equipment (UE) in a serving cell, wherein the serving cell is provided with network access service by the first base station; the first base station determines the initial transmitting power of the UE according to the uplink data; a first base station acquires a first transmission path loss parameter from UE to a service cell, and acquires interference information of the UE in an adjacent cell from a second base station, wherein the adjacent cell is provided with network access service by the second base station; the first base station calculates a signal noise parameter SNR of the UE in a service cell according to the initial transmitting power of the UE and the first transmission path loss parameter, and calculates an interference noise parameter INR according to interference information; the first base station calculates an adjustment amount according to the signal noise parameter SNR and the interference noise parameter INR; the first base station transmits the adjustment amount to the UE.

Description

Transmission power control method, base station and User Equipment (UE)
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a transmission power control method, a base station, and a User Equipment (UE).
Background
In a long Term Evolution (L ong Term Evolution, abbreviated as L TE) uplink system, after a UE sends a signal to a base station, in order to make a received signal of the base station meet a certain quality, the transmission power of the UE needs to be controlled to compensate for the loss and shadow fading of a wireless channel, generally, the stronger the transmission power of the UE, the stronger the received signal of the base station, and the better the reception quality, because the frequency reuse factor adopted between L TE system serving cells is generally 1, the received signal of the base station is also interfered by UE transmission signals of neighboring cells, as shown in fig. 1, a transmission signal of a UE1 belonging to a cell where the base station 1 is located may interfere with a UE2 belonging to a cell where the base station 2 is located, and a transmission signal of a UE2 belonging to a cell where the base station 2 is located may also interfere with a UE1 belonging to a cell where the base station 1 is located.
The current scheme mainly adopts a partial power compensation technology, and the idea is to partially compensate propagation loss energy so as to obtain the transmission power of the UE. The method specifically comprises the following steps: first, the UE obtains several parameters including a reference received power P from the base station0Partial path loss compensation factor α, reference transmit power PRSThen, the UE transmits power P according to the referenceRSAnd received PUERcvCalculating propagation loss PPL＝PRS–PUERcvFinally, the transmission power of each radio bearer of the UE is PUE＝min{PMax，10lgM+P0+αPPLIn which P isMaxM is the number of radio bearers for the maximum transmit power.
According to the scheme, the transmission loss of the UE to the base station of the service cell is only considered, the interference of the adjacent cell is indirectly reduced through partial path loss compensation, and the P is usedUEIt can be known from the partial path loss compensation factor α in the above calculation formula that the above scheme considers that the transmission loss of the UE to the serving cell base station and to the neighboring cell base station is in a fixed relationship, and thus the transmission loss of the UE to the serving cell base station and the neighboring cell base station is compensated according to the same proportion, but in practice, the transmission loss of the UE to the serving cell base station and to the neighboring cell base station is not necessarily in a fixed relationship, and there is a full possibility that the transmission loss of the UE to the serving cell base station is small, but the transmission loss to the neighboring cell base station is large, or there is a possibility that the transmission loss of the UE to the serving cell base station is large, but the transmission loss to the neighboring cell base station is small.
Disclosure of Invention
The embodiment of the invention provides a transmission power control method, a base station and User Equipment (UE), which can simultaneously improve the average throughput rate and the edge throughput rate of a service cell through power control.
In view of the above, a first aspect of the present invention provides a transmission power control method, including:
a first base station receives uplink data sent by User Equipment (UE) in a serving cell, wherein the serving cell is provided with network access service by the first base station;
the first base station determines the initial transmitting power of the UE according to the uplink data;
the first base station acquires a first propagation path loss parameter from the UE to the serving cell, and acquires interference information of the UE in an adjacent cell from a second base station, wherein the adjacent cell is provided with network access service by the second base station;
the first base station calculates a signal noise parameter SNR of the UE in the serving cell according to the initial transmitting power of the UE and a first propagation path loss parameter, and calculates an interference noise parameter INR according to the interference information;
the first base station calculates an adjustment amount according to the signal noise parameter SNR and the interference noise parameter INR;
and the first base station sends the adjustment amount to the UE so that the UE adjusts the transmission power according to the adjustment amount.
With reference to the first aspect of the present invention, a first embodiment of the first aspect of the present invention includes:
the first base station calculating the signal-to-noise parameter SNR of the UE in the serving cell according to the initial transmitting power of the UE and the first propagation path loss parameter comprises:
the first base station calculates a signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
the P isUEFor the initial transmission power, the PPLFor the first propagation path loss parameter, BRBFor each radio bearer's bandwidth, the N0Is the noise floor power.
With reference to the first embodiment of the first aspect of the present invention, the second embodiment of the first aspect of the present invention includes:
the first base station calculating an interference noise parameter INR according to the interference information includes:
the first base station calculates an interference noise parameter INR by:
INR＝10lg(sum:k∈(inrk))；
the representation of the set of neighboring cells, the inrkFor the interference information, the inrkIs a linear value of the interference strength of the UE to the adjacent cell k；
The inrkCalculated by the following method:
INRk＝10lg(inrk)；
the INRkCalculated by the following method:
INRk＝PUE–PPL,k–BRB–N0；
the P isPL,kAnd the second propagation path loss parameter from the UE to the adjacent cell k.
With reference to the second embodiment of the first aspect of the present invention, a third embodiment of the first aspect of the present invention includes:
the first base station calculating the adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR includes:
the first base station calculates a first parameter F according to the signal noise parameter SNRS(SNR) and calculating a second parameter F from said interference noise parameter INRI(INR)；
The first base station according to the first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount.
With reference to the third embodiment of the first aspect of the present invention, the fourth embodiment of the first aspect of the present invention includes:
the first base station calculates a first parameter F according to the signal noise parameter SNRS(SNR) includes:
if the SNR is less than the lower protection threshold SNRlowThen the first parameter FS(SNR) is infinite;
if the SNR is larger than the upper protection threshold SNRsatThen the first parameter FS(SNR) is 0;
if the SNR is less than the upper guard threshold SNRsatAnd is greater than or equal to the lower guard threshold SNRlowThen the first parameter FS(SNR) is (SNR)satSNR) squared.
With reference to the third embodiment of the first aspect of the present invention, the fourth embodiment of the first aspect of the present invention, the fifth embodiment of the first aspect of the present invention includes:
the first base station calculates a second parameter F according to the interference noise parameter INRI(INR) comprises:
if the INR is less than or equal to the threshold INRthThen the second parameter FI(INR) is 0;
if the INR is larger than the threshold INRthThen the second parameter FI(INR) is (INR-INR)th) Square of (d).
With reference to the fifth embodiment of the first aspect of the present invention, a sixth embodiment of the first aspect of the present invention includes:
the first base station according to the first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount comprises:
the first base station calculates target transmitting power P through the following formulaUE,2：
min F(PUE,2)＝FS(SNR)+ζFI(INR)；
The zeta is a preset compromise coefficient;
the first base station transmits the PUE,2And said PUEThe difference therebetween is used as the adjustment amount.
In view of the above, a second aspect of the present invention provides a transmission power control method, including:
a second base station acquires interference information of User Equipment (UE) in an adjacent cell, wherein the adjacent cell is provided with network access service by the second base station;
and the second base station sends the interference information to the first base station, and the first base station provides network access service for the service cell in which the UE is located.
In combination with the second aspect of the present invention, the first embodiment of the second aspect of the present invention comprises:
the transmission power control method further includes:
the second base station acquires a propagation path loss parameter from the UE to the adjacent cell;
and the second base station sends the propagation path loss parameter to the first base station.
In view of the above, a third aspect of the present invention provides a transmission power control method, including:
user Equipment (UE) sends uplink data to a first base station in a serving cell, wherein the serving cell is provided with network access service by the first base station;
the UE receives an adjustment quantity sent by the first base station, wherein the adjustment quantity is an adjustment quantity calculated by the first base station according to a signal noise parameter (SNR) and an interference noise parameter (SNR), the SNR is an SNR calculated by the first base station according to an initial transmission power of the UE and a propagation path loss parameter, the interference noise parameter is an INR calculated by the first base station according to interference information, the initial transmission power is a transmission power determined by the first base station according to the first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by a second base station, the second base station sends the interference information to the first base station, and the adjacent cell is provided with network access service by the second base station;
and the UE adjusts the transmitting power according to the adjustment quantity.
With reference to the third aspect of the present invention, the first embodiment of the third aspect of the present invention includes:
the UE adjusting the transmission power according to the adjustment quantity comprises the following steps:
the UE adjusts the transmission power P by the following formulaUE,1：
PUE,1＝min{PMax，10lgM+P0+αPPL+F}；
The P isMaxFor maximum transmission power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, and F is an adjustment amount.
In view of the above, a fourth aspect of the present invention provides a base station, used as a first base station, including:
a receiving unit, configured to receive uplink data sent by a user equipment UE in a serving cell, where the serving cell is provided with a network access service by the first base station;
a determining unit, configured to determine an initial transmit power of the UE according to the uplink data;
an obtaining unit, configured to obtain a first propagation path loss parameter from the UE to the serving cell, and obtain, from a second base station, interference information of the UE in an adjacent cell, where the adjacent cell is provided with a network access service by the second base station;
a first calculating unit, configured to calculate a signal-to-noise parameter SNR of the UE in the serving cell according to an initial transmit power of the UE and a first propagation path loss parameter, and calculate an interference-to-noise parameter INR according to the interference information;
a second calculating unit, configured to calculate an adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR;
a sending unit, configured to send the adjustment amount to the UE, so that the UE adjusts the transmission power according to the adjustment amount.
In combination with the fourth aspect of the present invention, the first embodiment of the fourth aspect of the present invention comprises:
the first calculating unit is specifically configured to calculate the signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
the P isUEFor the initial transmission power, the PPLFor the first propagation path loss parameter, BRBFor each radio bearer's bandwidth, the N0Is the noise floor power.
In combination with the fourth aspect of the present invention, the second embodiment of the fourth aspect of the present invention comprises:
the first calculating unit is specifically configured to calculate the interference noise parameter INR in the following manner:
INR＝10lg(sum:k∈(inrk))；
the representation of the set of neighboring cells, the inrkFor the interference information, the inrkIs a linear value of the interference strength of the UE to the adjacent cell k;
the inrkCalculated by the following method:
INRk＝10lg(inrk)；
the INRkCalculated by the following method:
INRk＝PUE–PPL,k–BRB–N0；
the P isPL,kAnd the second propagation path loss parameter from the UE to the adjacent cell k.
In combination with the second embodiment of the fourth aspect of the present invention, the third embodiment of the fourth aspect of the present invention includes:
the second calculation unit is specifically configured to calculate the first parameter F according to the signal-to-noise parameter SNRS(SNR) and calculating a second parameter F from said interference noise parameter INRI(INR); according to said first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount.
With reference to the third embodiment of the fourth aspect of the present invention, the fourth embodiment of the fourth aspect of the present invention includes:
the second calculating unit is further specifically configured to determine whether the SNR is less than a lower protection threshold SNRlowThen the first parameter FS(SNR) is infinite; if the SNR is larger than the upper protection threshold SNRsatThen the first parameter FS(SNR) is 0; if the SNR is less than the upper guard threshold SNRsatAnd is greater than or equal to the lower guard threshold SNRlowThen the first parameter FS(SNR) is (SNR)satSNR) squared.
With reference to the third embodiment of the fourth aspect of the present invention, a fourth embodiment of the fourth aspect of the present invention, a fifth embodiment of the fourth aspect of the present invention includes:
the second calculating unit is further specifically configured to calculate the threshold INR if the INR is less than or equal to the threshold INRthThen the second parameter FI(INR) is 0; if the INR is larger than the threshold INRthThen the second parameter FI(INR) is (INR-INR)th) Square of (d).
With reference to the fifth embodiment of the fourth aspect of the present invention, a sixth embodiment of the fourth aspect of the present invention includes:
the second calculating unit is specifically configured to calculate the target transmission power P by the following formulaUE,2：
min F(PUE,2)＝FS(SNR)+ζFI(INR); the zeta is a preset compromise coefficient; the P is addedUE,2And said PUEThe difference therebetween is used as the adjustment amount.
In view of the above, a fifth aspect of the present invention provides a base station, for use as a second base station, comprising:
an obtaining unit, configured to obtain interference information of a UE in an adjacent cell, where the adjacent cell is provided with a network access service by the second base station;
and the sending unit is used for sending the interference information to a first base station, and the first base station provides network access service for a service cell in which the UE is located.
With reference to the fifth aspect of the present invention, the first embodiment of the fifth aspect of the present invention includes:
the obtaining unit is further configured to obtain a propagation path loss parameter from the UE to the neighboring cell;
the sending unit is further configured to send the propagation path loss parameter to the first base station.
In view of the above, a sixth aspect of the present invention provides a user equipment UE, including:
a sending unit, configured to send uplink data to a first base station in a serving cell, where the serving cell is provided with a network access service by the first base station;
a receiving unit, configured to receive an adjustment amount sent by the first base station, where the adjustment amount is an adjustment amount calculated by the first base station according to a signal-to-noise parameter SNR and an interference-to-noise parameter SNR, the SNR is an SNR calculated by the first base station according to an initial transmit power of the UE and a propagation path loss parameter, the interference-to-noise parameter is an INR calculated by the first base station according to interference information, the initial transmit power is a transmit power determined by the first base station according to the first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by a second base station, the second base station sends the interference information to the first base station, and the adjacent cell is provided with a network access service by the second base station;
and the adjusting unit is used for adjusting the transmitting power according to the adjusting amount.
With reference to the sixth aspect of the present invention, the first embodiment of the sixth aspect of the present invention includes:
the adjusting unit is specifically configured to adjust the transmission power P by the following formulaUE,1：
PUE,1＝min{PMax，10lgM+P0+αPPL+F}；
The P isMaxFor maximum transmission power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, and F is an adjustment amount.
According to the technical scheme, the embodiment of the invention has the following advantages: the transmission loss of the UE to the first base station is considered by acquiring the first transmission path loss parameter of the UE in the serving cell through the first base station, in addition, the interference information of the UE in the adjacent cell is acquired from the second base station through the first base station to consider the interference of the UE to the second base station, after the transmission loss of the UE to the first base station and the interference of the UE to the second base station are comprehensively considered by the first base station, the first base station calculates the adjustment amount and then sends the adjustment amount to the UE, so that the UE adjusts the transmitting power according to the adjustment amount, and therefore, the average throughput rate and the edge throughput rate of the serving cell can be simultaneously improved through power control.
Drawings
FIG. 1 is a schematic diagram of network interference;
FIG. 2 is a system architecture diagram according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an embodiment of a transmission power control method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of another embodiment of a transmission power control method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of another embodiment of a transmission power control method according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating a first base station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second base station according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a UE according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a server structure according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a transmission power control method, a base station and User Equipment (UE), which can simultaneously improve the average throughput rate and the edge throughput rate of a service cell through power control.
In order to facilitate understanding of the technical solution of the present invention, the following is a description of the principle of the transmission power control method of the present invention:
because the existing scheme only considers the transmission loss of the UE to the serving cell base station, and the present invention comprehensively considers the transmission loss of the UE to the serving cell base station and the interference to the neighboring cells in order to improve the average throughput and the marginal throughput of the serving cell, please refer to fig. 2, fig. 2 is a system architecture diagram of the transmission power control method of the present invention, in fig. 2, the UE belongs to the base station 2, the UE generates a certain interference to the neighboring cell base station 1 and the neighboring cell base station 2, and the base stations can perform limited information interaction. The invention needs to find a balance point between the signal quality of the UE and the interference influence to the adjacent cell, and ensures the average throughput rate and the marginal throughput rate of the system.
Referring to fig. 3, the present invention is described by way of an embodiment, where an embodiment of a method for controlling transmit power in an embodiment of the present invention includes:
101. a first base station receives uplink data sent by User Equipment (UE) in a serving cell, wherein the serving cell is provided with network access service by the first base station;
in this embodiment, a first base station provides a network access service for a serving cell, a user equipment UE exists in the serving cell, the UE sends uplink data to the base station, and the first base station receives the uplink data.
Note that, there are one or more neighboring cells around the serving cell.
In addition, when the UE accesses the network, the UE measures channel gains of surrounding cells, and selects a cell with the strongest channel gain as a serving cell.
102. The first base station determines the initial transmitting power of the UE according to the uplink data;
and the first base station receives the uplink data and determines the initial transmitting power of the UE according to the uplink data.
It should be noted that, the UE may calculate the initial transmit power by:
first, the UE obtains several parameters including a reference received power P from the base station0Partial path loss compensation factor α, reference transmit power PRSThen, the UE transmits power P according to the referenceRSAnd received PUERcvCalculating propagation loss PPL＝PRS–PUERcvFinally, the transmission power of each radio bearer of the UE is PUE＝min{PMax，10lgM+P0+αPPLIn which P isMaxM is the number of radio bearers for the maximum transmit power.
After calculating the initial transmitting power, the UE sends uplink data to the base station through the initial transmitting power, and the base station determines the initial transmitting power by receiving the uplink data.
103. A first base station acquires a first transmission path loss parameter from UE to a service cell, and acquires interference information of the UE in an adjacent cell from a second base station, wherein the adjacent cell is provided with network access service by the second base station;
the first propagation path loss parameter is PPLIn which P isPL＝PRS–PUERcvAnd the interference information is a linear value of the interference intensity from the UE to the adjacent cell k, and if the adjacent cell k is provided with network access service by the second base station, the first base station acquires the interference information of the UE in the adjacent cell from the second base station.
104. The first base station calculates a signal noise parameter SNR of the UE in a service cell according to the initial transmitting power of the UE and the first transmission path loss parameter, and calculates an interference noise parameter INR according to interference information;
after the first base station determines the initial transmitting power and acquires the first propagation path loss parameter and the interference information, the first base station calculates a signal noise parameter SNR of the UE in the serving cell according to the initial transmitting power of the UE and the first propagation path loss parameter, and calculates an interference noise parameter INR according to the interference information.
Optionally, in some embodiments of the present invention, the calculating, by the first base station, a signal-to-noise parameter SNR of the UE in the serving cell according to the initial transmit power of the UE and the first propagation path loss parameter includes:
the first base station calculates the signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
wherein P isUEIs the initial transmission power, PPLFor the first propagation path loss parameter, BRBBandwidth per radio bearer, N0Is the noise floor power.
In the L TE system, BRBCan be 180kHz, i.e. 52.55dB, in which case N0The unit of (A) is dBm/Hz, and N can be obtained by a background noise measurement method in the prior art0。
The first base station calculates the interference noise parameter INR by:
INR＝10lg(sum:k∈(inrk))；
wherein a set of neighbouring cells, inr, is indicatedkFor interference information, inrkFor the linear value of the interference strength from the UE to the neighboring cell k, INR is the sum of the interference information.
Wherein inrkCalculated by the following method:
INRk＝10lg(inrk)；
the INR mentioned abovekCalculated by the following method:
INRk＝PUE–PPL,k–BRB–N0；
p is abovePL,kIs the second propagation path loss parameter for the UE to the neighboring cell k.
It should be noted that the second propagation path loss parameter may be obtained by a similar method to the first propagation path loss parameter.
105. The first base station calculates an adjustment amount according to the signal noise parameter SNR and the interference noise parameter INR;
after the first base station calculates the signal noise parameter SNR and the interference noise parameter INR, the first base station calculates the adjustment amount according to the signal noise parameter SNR and the interference noise parameter INR.
Optionally, in some embodiments of the present invention, the calculating, by the first base station, the adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR includes:
the first base station calculates a first parameter F according to the signal noise parameter SNRS(SNR) and calculating a second parameter F based on the interference noise parameter INRI(INR)；
The first base station is based on the first parameter FS(SNR) and a second parameter FI(INR) calculating an adjustment amount.
Further optionally, in some embodiments of the invention, the first base station calculates the first parameter F based on the signal-to-noise parameter SNRS(SNR) includes:
if SNR is less than lower protection threshold value SNRlowThen a first parameter FS(SNR) is infinite;
if SNR is larger than upper protection threshold SNRsatThen a first parameter FS(SNR) is 0;
if SNR is less than upper guard threshold SNRsatAnd is greater than or equal to the lower guard threshold SNRlowThen a first parameter FS(SNR) is (SNR)satSNR) squared.
The first parameter FS(SNR) can be expressed by the following function:
FS(SNR)＝{
∞，SNR<SNRlow
(SNRsat–SNR)2，SNRlow≤SNR<SNRsat
0，SNR>SNRsat
}
it should be noted that the SNRlow and SNRsat can be obtained through simulation.
Further optionally, in some embodiments of the invention, the first base station calculates the second parameter F according to the interference noise parameter INRI(INR) comprises:
if INR is less than or equal to the threshold INRthThen the second parameter FI(INR) is 0;
if INR is greater than threshold INRthThen the second parameter FI(INR) is (INR-INR)th) Square of (d).
The second parameter FI(INR) can be represented by the following function:
FI(INR)＝{
0，INR≤INRth
(INR–INRth)2，INR>INRth
}
further optionally, the first base station is configured to determine the first parameter F according to the first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount comprises:
the first base station calculates the target transmitting power P by the following formulaUE,2：
min F(PUE,2)＝FS(SNR)+ζFI(INR)；
Wherein ζ is a preset compromise coefficient;
the first base station will PUE,2And PUEThe difference between them is used as the adjustment amount.
ζ may be obtained by simulation, and the adjustment amount F ═ PUE,2–PUE。
106. And the first base station sends the adjustment amount to the UE so that the UE adjusts the transmission power according to the adjustment amount.
And after the first base station calculates the adjustment amount, the first base station sends the adjustment amount to the UE, and the UE adjusts the transmission power according to the adjustment amount after receiving the adjustment amount.
It should be noted that, the UE may adjust the transmission power according to the following formula:
PUE,1＝min{PMax，10lgM+P0+αPPL+ F }; wherein F is the adjustment amount.
In this embodiment, the first base station acquires a first propagation path loss parameter of the UE in the serving cell to consider transmission loss of the UE to the first base station, and in addition, the first base station acquires interference information of the UE in an adjacent cell from the second base station to consider interference of the UE to the second base station, after the first base station comprehensively considers transmission loss of the UE to the first base station and interference of the UE to the second base station, the first base station calculates an adjustment amount, and then sends the adjustment amount to the UE, so that the UE adjusts transmission power according to the adjustment amount, and thus, the average throughput and edge throughput of the serving cell can be simultaneously improved through power control.
In the above description of the transmission power control method of the present invention from the perspective of the first base station, and in the following description of the transmission power control method of the present invention from the perspective of the second base station, referring to fig. 4, another embodiment of the transmission power control method in the embodiment of the present invention includes:
201. the second base station acquires interference information of User Equipment (UE) in an adjacent cell, and the adjacent cell is provided with network access service by the second base station;
in this embodiment, the UE belonging to the first base station generates interference information in an adjacent cell, where the adjacent cell is provided with a network access service by the second base station, and the second base station obtains the interference information.
It should be noted that the second base station is an example, and does not mean that the second base station is only one base station, and in practical applications, the second base station refers to a plurality of adjacent base stations capable of exchanging information, and there are a plurality of second base stations.
202. And the second base station sends the interference information to the first base station, and the first base station provides network access service for the service cell in which the UE is located.
After the second base station acquires the interference information, the second base station sends the interference information to the first base station, wherein the service cell where the UE is located is provided with network access service by the first base station.
Optionally, in some embodiments of the present invention, the method further includes:
the second base station acquires a transmission path loss parameter from the UE to an adjacent cell;
and the second base station sends the propagation path loss parameter to the first base station.
It can be understood that, after obtaining the interference information and the propagation path loss parameter, the first base station may calculate the adjustment amount according to the interference information and the propagation path loss parameter and other parameters obtained by itself.
In this embodiment, the second base station obtains the interference information and sends the interference information to the first base station, so that the first base station can calculate the adjustment amount according to the interference information and other parameters obtained by the first base station, and the UE can adjust the transmission power according to the adjustment amount.
In the above, the transmission power control method of the present invention is described from the perspective of the first base station and the second base station, and in the following, the transmission power control method of the present invention is described from the perspective of the user equipment UE, please refer to fig. 5, where another embodiment of the transmission power control method in the embodiment of the present invention includes:
301. user Equipment (UE) sends uplink data to a first base station in a serving cell, wherein the first base station provides network access service for the serving cell;
in this embodiment, when the UE accesses the network, the UE measures channel gains of surrounding cells, and selects a cell with the strongest channel gain as a serving cell, and after the UE determines the serving cell, the UE sends uplink data to the first base station in the serving cell, where the first base station provides a network access service.
302. The UE receives the adjustment quantity sent by the first base station;
after the UE sends uplink data to the first base station, the UE receives the adjustment amount sent by the first base station.
It should be noted that the adjustment amount is an adjustment amount calculated by the first base station according to a signal-to-noise parameter SNR and an interference-to-noise parameter SNR, where the SNR is an SNR calculated by the first base station according to an initial transmit power of the UE and a propagation path loss parameter, the interference-to-noise parameter is an INR calculated by the first base station according to interference information, the initial transmit power is a transmit power determined by the first base station according to the first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by the second base station, the second base station transmits the interference information to the first base station, and the adjacent cell is provided with a network access service by the second base station;
303. and the UE adjusts the transmitting power according to the adjustment quantity.
And after the UE receives the adjustment quantity, the UE adjusts the transmission power according to the adjustment quantity.
It should be noted that, in some embodiments of the present invention, the UE may adjust the transmit power according to the following formula:
PUE,1＝min{PMax，10lgM+P0+αPPL+ F }; wherein P isMaxFor maximum transmit power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, and F is an adjustment.
In this embodiment, the UE sends uplink data to the first base station, so that the first base station can obtain initial transmit power according to the uplink data, calculate an adjustment amount according to other parameters, send the obtained adjustment amount to the UE, and adjust the transmit power by the UE through the adjustment amount, so that the UE obtains appropriate transmit power.
In the above, the method for controlling the transmission power according to the embodiment of the present invention is introduced, and referring to fig. 6, the first base station according to the embodiment of the present invention is introduced as follows:
a receiving unit 401, configured to receive uplink data sent by a UE in a serving cell, where the serving cell is provided with a network access service by a first base station;
a determining unit 402, configured to determine an initial transmit power of the UE according to uplink data;
an obtaining unit 403, configured to obtain a first propagation path loss parameter from the UE to the serving cell, and obtain interference information of the UE in an adjacent cell from the second base station, where the adjacent cell is provided with a network access service by the second base station;
a first calculating unit 404, configured to calculate a signal-to-noise parameter SNR of the UE in the serving cell according to the initial transmit power of the UE and the first propagation path loss parameter, and calculate an interference-to-noise parameter INR according to the interference information;
a second calculating unit 405, configured to calculate an adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR;
a sending unit 406, configured to send the adjustment amount to the UE, so that the UE adjusts the transmission power according to the adjustment amount.
In this embodiment, the first base station acquires a first propagation path loss parameter of the UE in the serving cell to consider transmission loss of the UE to the first base station, and in addition, the first base station acquires interference information of the UE in an adjacent cell from the second base station to consider interference of the UE to the second base station, after the first base station comprehensively considers transmission loss of the UE to the first base station and interference of the UE to the second base station, the first base station calculates an adjustment amount, and then sends the adjustment amount to the UE, so that the UE adjusts transmission power according to the adjustment amount, and thus, the average throughput and edge throughput of the serving cell can be simultaneously improved through power control.
Optionally, in some embodiments of the present invention, the first calculating unit 404 is specifically configured to calculate the signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
wherein P isUEIs the initial transmission power, PPLFor the first propagation path loss parameter, BRBBandwidth per radio bearer, N0Is the noise floor power.
Optionally, in some embodiments of the present invention, the first calculating unit 404 is specifically configured to calculate the interference noise parameter INR by:
INR＝10lg(sum:k∈(inrk))；
wherein a set of neighbouring cells, inr, is indicatedkFor interference information, inrkIs a linear value of the interference strength from the UE to the adjacent cell k;
inrkcalculated by the following method:
INRk＝10lg(inrk)；
INRkcalculated by the following method:
INRk＝PUE–PPL,k–BRB–N0；
wherein P isPL,kIs the second propagation path loss parameter for the UE to the neighboring cell k.
Optionally, in some embodiments of the present invention, the second calculating unit 405 is specifically configured to calculate the first parameter F according to the signal-to-noise parameter SNRS(SNR) and calculating a second parameter F based on the interference noise parameter INRI(INR); according to a first parameter FS(SNR) and a second parameter FI(INR) calculating an adjustment amount.
Further optionally, in some embodiments of the present invention, the second calculating unit 405 is further specifically configured to, if the SNR is less than the lower protection threshold SNR, determine whether the SNR is greater than the lower protection threshold SNRlowThen a first parameter FS(SNR) is infinite; if SNR is larger than upper protection threshold SNRsatThen a first parameter FS(SNR) is 0; if SNR is less than upper guard threshold SNRsatAnd is greater than or equal to the lower guard threshold SNRlowThen a first parameter FS(SNR) is (SNR)satSNR) squared.
Optionally, in some embodiments of the present invention, the second calculating unit 405 is further specifically configured to calculate the threshold INR if INR is less than or equal to the threshold INRthThen the second parameter FI(INR) is 0; if INR is greater than threshold INRthThen the second parameter FI(INR) is (INR-INR)th) Square of (d).
Optionally, in some embodiments of the present invention, the second calculating unit 405 is specifically configured to calculate the target transmission power P by the following formulaUE,2：
min F(PUE,2)＝FS(SNR)+ζFI(INR); wherein ζ is a preset compromise coefficient; will PUE,2And PUEThe difference between them is used as the adjustment amount.
Referring to fig. 7, a second base station in an embodiment of the present invention is described below, where an embodiment of the second base station in the embodiment of the present invention includes:
an obtaining unit 501, configured to obtain interference information of a UE in an adjacent cell, where the adjacent cell is provided with a network access service by a second base station;
a sending unit 502, configured to send the interference information to the first base station, where a serving cell in which the UE is located is provided with a network access service by the first base station.
Alternatively, in some embodiments of the present invention,
an obtaining unit 501, configured to obtain a propagation path loss parameter from the UE to the neighboring cell;
the sending unit 502 is further configured to send the propagation path loss parameter to the first base station.
In this embodiment, the second base station obtains the interference information and sends the interference information to the first base station, so that the first base station can calculate the adjustment amount according to the interference information and other parameters obtained by the first base station, and the UE can adjust the transmission power according to the adjustment amount.
Referring to fig. 8, a user equipment UE in an embodiment of the present invention is described below, where an embodiment of the user equipment UE in the embodiment of the present invention includes:
a sending unit 601, configured to send uplink data to a first base station in a serving cell, where the serving cell is provided with a network access service by the first base station;
a receiving unit 602, configured to receive an adjustment amount sent by a first base station, where the adjustment amount is an adjustment amount calculated by the first base station according to a signal-to-noise parameter SNR and an interference-to-noise parameter SNR, the SNR is an SNR calculated by the first base station according to an initial transmit power of a UE and a propagation path loss parameter, the interference-to-noise parameter is an INR calculated by the first base station according to interference information, the initial transmit power is a transmit power determined by the first base station according to first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by a second base station, the second base station sends the interference information to the first base station, and the adjacent cell provides a network access service through the second base station;
an adjusting unit 603, configured to adjust the transmission power according to the adjustment amount.
Alternatively, in some embodiments of the present invention,
an adjusting unit 603, specifically configured to adjust the transmission power P by the following formulaUE,1：
PUE,1＝min{PMax，10lgM+P0+αPPL+F}；
Wherein P isMaxFor maximum transmit power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, and F is an adjustment.
Referring to fig. 9, an embodiment of the server according to the present invention further provides a server, where:
fig. 9 is a schematic diagram of a server structure provided by an embodiment of the present invention, where the server 700 may have a relatively large difference due to different configurations or performances, and may include one or more Central Processing Units (CPUs) 701 (e.g., one or more processors), one or more storage media 704 (e.g., one or more mass storage devices) storing applications 702 or data 703. Storage medium 704 may be, among other things, transient or persistent storage. The program stored on the storage medium 704 may include one or more modules (not shown), each of which may include a sequence of instruction operations for the switch. Still further, the central processor 701 may be arranged to communicate with the storage medium 704, and execute a series of instruction operations in the storage medium 704 on the server 700.
The server 700 may also include one or more power supplies 705, one or more wired or wireless network interfaces 706, one or more output interfaces 707, and/or one or more operating systems 708, such as Windows ServerTM, Mac OS XTM, UnixTM, and &lTtTtranslation = L "&gTtL &lTt/T &gTtinxTM, FreeDTM, and the like.
The steps performed by the first base station, the second base station and the UE in the above embodiments may be based on the server structure shown in fig. 9.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (22)

1. A method of transmit power control, comprising:
a first base station receives uplink data sent by User Equipment (UE) in a serving cell, wherein the serving cell is provided with network access service by the first base station;
the first base station determines the initial transmitting power of the UE according to the uplink data;
the first base station acquires a first propagation path loss parameter from the UE to the serving cell, and acquires interference information of the UE in an adjacent cell from a second base station, wherein the interference information is a linear value of interference intensity from the UE to the adjacent cell, and the second base station provides network access service for the adjacent cell;
the first base station calculates a signal noise parameter SNR of the UE in the serving cell according to the initial transmitting power of the UE and a first propagation path loss parameter, and calculates an interference noise parameter INR according to the interference information;
the first base station calculates an adjustment amount according to the signal noise parameter SNR and the interference noise parameter INR;
and the first base station sends the adjustment amount to the UE so that the UE adjusts the transmission power according to the adjustment amount.
2. The method of claim 1, wherein the first base station calculating the SNR of the signal-to-noise parameter of the UE in the serving cell according to the initial transmit power of the UE and a first propagation path loss parameter comprises:
the first base station calculates a signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
the P isUEFor the initial transmission power, the PPLFor the first propagation path loss parameter, BRBFor each radio bearer's bandwidth, the N0Is the noise floor power.
3. The method of claim 2, wherein the first base station calculating an interference noise parameter INR according to the interference information comprises:
the first base station calculates an interference noise parameter INR by:
INR＝10lg(sum:k∈(inrk))；
the representation of the set of neighboring cells, the inrkFor the interference information, the inrkIs a linear value of the interference strength of the UE to the adjacent cell k;
the inrkCalculated by the following method:
INRk＝10lg(inrk)；
the INRkCalculated by the following method:
INRk＝PUE–PPL,k–BRB–N0；
the P isPL,kAnd the second propagation path loss parameter from the UE to the adjacent cell k.
4. The method of claim 3, wherein the first base station calculating the adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR comprises:
the first base station calculates a first parameter F according to the signal noise parameter SNRS(SNR) and calculating a second parameter F from said interference noise parameter INRI(INR)；
The first base station according toThe first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount.
5. The transmission power control method of claim 4, wherein the first base station calculates a first parameter F according to the signal-to-noise parameter SNRS(SNR) includes:
if the SNR is less than the lower protection threshold SNRlowThen the first parameter FS(SNR) is infinite;
if the SNR is larger than the upper protection threshold SNRsatThen the first parameter FS(SNR) is 0;
if the SNR is less than the upper guard threshold SNRsatAnd is greater than or equal to the lower guard threshold SNRlowThen the first parameter FS(SNR) is (SNR)satSNR) squared.
6. Method for transmission power control according to claim 4 or 5, characterized in that said first base station calculates a second parameter F from said interference noise parameter INRI(INR) comprises:
if the INR is less than or equal to the threshold INRthThen the second parameter FI(INR) is 0;
if the INR is larger than the threshold INRthThen the second parameter FI(INR) is (INR-INR)th) Square of (d).
7. The transmission power control method of claim 6, wherein the first base station is configured to control the transmission power according to the first parameter FS(SNR) and a second parameter FI(INR) calculating the adjustment amount comprises:
the first base station calculates target transmitting power P through the following formulaUE,2：
min F(PUE,2)＝FS(SNR)+ζFI(INR)；
F(PUE,2) Is a penalty function;
the zeta is a preset compromise coefficient;
the first base station transmits the PUE,2And said PUEThe difference therebetween is used as the adjustment amount.
8. A method of transmit power control, comprising:
a second base station acquires interference information of User Equipment (UE) in an adjacent cell, wherein the adjacent cell is provided with network access service by the second base station;
the second base station sends the interference information to the first base station, so that the first base station calculates an interference noise parameter INR according to the interference information, calculates an adjustment quantity according to the interference noise parameter INR and a dry signal noise parameter SNR, and finally sends the adjustment quantity to the UE, wherein the adjustment quantity is used for indicating the UE to adjust the transmitting power, the interference information is a linear value of the interference intensity from the UE to an adjacent cell, the signal noise parameter SNR is calculated by the first base station according to the initial transmitting power of the UE and a first transmission path loss parameter from the UE to the serving cell, and the serving cell where the UE is located is provided with network access service by the first base station.
9. The transmission power control method of claim 8, further comprising:
the second base station acquires a propagation path loss parameter from the UE to the adjacent cell;
and the second base station sends the propagation path loss parameter to the first base station.
10. A method of transmit power control, comprising:
user Equipment (UE) sends uplink data to a first base station in a serving cell, wherein the serving cell is provided with network access service by the first base station;
the UE receives an adjustment quantity sent by the first base station, wherein the adjustment quantity is an adjustment quantity calculated by the first base station according to a signal noise parameter (SNR) and an interference noise parameter (INR), the SNR is the SNR calculated by the first base station according to an initial transmission power of the UE and a propagation path loss parameter, the interference noise parameter is the INR calculated by the first base station according to interference information, the initial transmission power is a transmission power determined by the first base station according to first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by a second base station, the interference information is a linear value of interference intensity from the UE to the adjacent cell, the second base station sends the interference information to the first base station, and the adjacent cell provides network access service by the second base station;
and the UE adjusts the transmitting power according to the adjustment quantity.
11. The method of claim 10, wherein the UE adjusting the transmit power according to the adjustment amount comprises:
the UE adjusts the transmission power P by the following formulaUE,1：
PUE,1＝min{PMax，10lgM+P0+αPPL+F}；
The P isMaxFor maximum transmission power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, F is an adjustment amount, and P isPLIs a first propagation path loss parameter.
12. A base station, for use as a first base station, comprising:
a receiving unit, configured to receive uplink data sent by a user equipment UE in a serving cell, where the serving cell is provided with a network access service by the first base station;
a determining unit, configured to determine an initial transmit power of the UE according to the uplink data;
an obtaining unit, configured to obtain a first propagation path loss parameter from the UE to the serving cell, and obtain, from a second base station, interference information of the UE in an adjacent cell, where the interference information is a linear value of interference strength from the UE to the adjacent cell, and the second base station provides a network access service for the adjacent cell;
a first calculating unit, configured to calculate a signal-to-noise parameter SNR of the UE in the serving cell according to an initial transmit power of the UE and a first propagation path loss parameter, and calculate an interference-to-noise parameter INR according to the interference information;
a second calculating unit, configured to calculate an adjustment amount according to the signal-to-noise parameter SNR and the interference-to-noise parameter INR;
a sending unit, configured to send the adjustment amount to the UE, so that the UE adjusts the transmission power according to the adjustment amount.
13. The base station of claim 12,
the first calculating unit is specifically configured to calculate the signal-to-noise parameter SNR by:
SNR＝PUE–PPL–BRB–N0；
the PUE is the initial transmission power, the PP L is the first propagation path loss parameter, the BRB is a bandwidth of each radio bearer, and the N0 is a noise floor power.
14. The base station of claim 12,
the first calculating unit is specifically configured to calculate the interference noise parameter INR in the following manner:
INR＝10lg(sum:k∈(inrk))；
the representation represents a set of each adjacent cell, the inrk is the interference information, and the inrk is a linear value of interference intensity from the UE to the adjacent cell k;
the inrk is calculated as follows:
INRk＝10lg(inrk)；
the INRk is calculated as follows:
INRk＝PUE–PPL,k–BRB–N0；
the PP L, k is a second propagation path loss parameter from the UE to the neighboring cell k.
15. The base station of claim 14,
the second calculating unit is specifically configured to calculate a first parameter fs (SNR) according to the signal-to-noise parameter SNR, and calculate a second parameter fi (INR) according to the interference noise parameter INR; calculating the adjustment amount according to the first parameter FS (SNR) and a second parameter FI (INR).
16. The base station of claim 15,
the second calculating unit is further specifically configured to determine that the first parameter fs (SNR) is infinity if the SNR is smaller than a lower protection threshold SNRlow; if the SNR is greater than an upper guard threshold SNRsat, the first parameter fs (SNR) is 0; if the SNR is less than the upper guard threshold SNRsat and greater than or equal to the lower guard threshold SNRlow, the first parameter fs (SNR) is the square of (SNRsat-SNR).
17. The base station according to claim 15 or 16,
the second calculating unit is further specifically configured to, if the INR is less than or equal to a threshold value INRth, set the second parameter fi (INR) to be 0; if the INR is larger than a threshold value INRth, the second parameter fi (INR) is the square of (INR-INRth).
18. The base station of claim 17,
the second calculating unit is specifically configured to calculate the target transmit power PUE,2 according to the following formula:
min F (PUE,2) ═ fs (snr) + ζ fi (inr); the zeta is a preset compromise coefficient;
f (PUE,2) is a penalty function; and taking the difference value between the PUE,2 and the PUE as the adjustment amount.
19. A base station, for use as a second base station, comprising:
an obtaining unit, configured to obtain interference information of a UE in an adjacent cell, where the adjacent cell is provided with a network access service by the second base station;
a sending unit, configured to send the interference information to a first base station, so that the first base station calculates an interference noise parameter INR according to the interference information, calculates an adjustment amount according to the interference noise parameter INR and a dry signal noise parameter SNR, and finally sends the adjustment amount to the UE, where the adjustment amount is used to instruct the UE to adjust transmission power, the interference information is a linear value of interference intensity from the UE to an adjacent cell, the signal noise parameter SNR is calculated by the first base station according to an initial transmission power of the UE and a first propagation path loss parameter from the UE to the serving cell, and the serving cell where the UE is located is provided with network access service by the first base station.
20. The base station of claim 19,
the obtaining unit is further configured to obtain a propagation path loss parameter from the UE to the neighboring cell;
the sending unit is further configured to send the propagation path loss parameter to the first base station.
21. A User Equipment (UE), comprising:
a sending unit, configured to send uplink data to a first base station in a serving cell, where the serving cell is provided with a network access service by the first base station;
a receiving unit, configured to receive an adjustment amount sent by the first base station, where the adjustment amount is an adjustment amount calculated by the first base station according to a signal-to-noise parameter SNR and an interference-to-noise parameter INR, the SNR is an SNR calculated by the first base station according to the initial transmit power of the UE and the propagation path loss parameter, the interference noise parameter is INR calculated by the first base station according to interference information, the initial transmission power is transmission power determined by the first base station according to first uplink data, the interference information is interference information of the UE in an adjacent cell acquired by the second base station, the interference information is a linear value of interference intensity from the UE to an adjacent cell, the second base station sends the interference information to the first base station, and the adjacent cell is provided with network access service by the second base station;
and the adjusting unit is used for adjusting the transmitting power according to the adjusting amount.
22. The UE of claim 21,
the adjusting unit is specifically configured to adjust the transmission power P by the following formulaUE,1：
PUE,1＝min{PMax，10lgM+P0+αPPL+F}；
The P isMaxFor maximum transmission power, M is the number of radio bearers, P0For reference received power, α is a partial path loss compensation factor, F is an adjustment amount, and P isPLIs a first propagation path loss parameter.
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