CN107623942B - Method and device for adjusting uplink power - Google Patents

Method and device for adjusting uplink power Download PDF

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CN107623942B
CN107623942B CN201610556754.4A CN201610556754A CN107623942B CN 107623942 B CN107623942 B CN 107623942B CN 201610556754 A CN201610556754 A CN 201610556754A CN 107623942 B CN107623942 B CN 107623942B
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path loss
power
difference
actual
adjustment information
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CN107623942A (en
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李中洋
石昕娅
李贝贝
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ZTE Corp
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ZTE Corp
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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

Abstract

The invention provides a method and a device for adjusting uplink power. Wherein, the method comprises the following steps: determining a first downlink path loss and a second downlink path loss, wherein the first downlink path loss is measured by User Equipment (UE), and the second downlink path loss is an actual downlink path loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE. The invention solves the technical problem that the UE can not accurately adjust the transmitting power in the related technology.

Description

Method and device for adjusting uplink power
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for adjusting uplink power.
Background
In a 3GPP LTE (Long Term Evolution ) system, in order to avoid the co-channel interference problem and the related problems caused by frequent handover, an LTE network adopts a Cell merging manner to solve the problem, that is, several independent cells with different Physical Cell IDs are merged into a logical Cell with a PCI (Physical Cell Identifier), the merged logical Cell is also called a super Cell (super Cell), and each originally independent Physical Cell becomes a part (CP, Cell port) of the super Cell. The CP controlling the whole cell scheduling in the SuperCell is a cell-level main CP, and other non-scheduling CPs are cell-level auxiliary CPs.
In actual network coverage, Hot spot coverage (Hot compensation) is often performed by placing Micro stations (Micro cells) in the coverage of Macro cells (Macro cells), as shown in fig. 1. In order to avoid co-channel interference between Macro-Micro base stations, the Macro-Micro Cell coverage forms a Macro-Micro heterogeneous super Cell by adopting a Cell merging mode, wherein the Macro Cell and the Micro Cell are respectively called a CP (such as Macro CP0 and Micro CP1) of the Macro-Micro heterogeneous super Cell, and both the Macro Cell and the Micro Cell can be used as a main CP of the super Cell.
In a macro-micro super cell, a super cell generally inherits and combines the PCI, reference signal power, system information block, and other configuration information of an original macro cell or a micro cell. For an LTE network, the maximum downlink transmission power of a macro station is about 40w, and the maximum downlink transmission power of a micro station is 1w or 50mw, so in a macro-micro heterogeneous super cell, the reference signal power configuration difference between macro-micro base stations is about 20dB, and in some scenarios, is even as much as 30 dB. As shown in fig. 1, when Reference Signal Receiving Power (RSRP) of a cell configuration is a transmission Power of a macro station rru (radio Remote unit), a UE1 is in a coverage area of a micro station, and a PL calculated by a UE1 according to a Reference Signal is greater than an actual PL (i.e., PL1 is greater than PL 2). Conversely, when the reference signal power configured by the cell is the transmission power of the micro station RRU, the UE2 is in the macro station coverage area, and the PL calculated by the UE2 according to the reference signal is smaller than the actual PL. In the above scenario, if only the current PUSCH closed-loop power control method is adopted to adjust the UE power, the following problems may occur:
the UE may cause the PUSCH transmission power to be too large because the calculated PL is greater than the actual PL, so that power is wasted and uplink interference is increased.
The UE may cause insufficient PUSCH transmission power because the calculated PL is smaller than the actual PL, so that the risk of uplink out-of-synchronization is increased, and the user experience is reduced.
Aiming at the technical problem that the User Equipment (UE) in the related technology cannot accurately adjust the transmitting power, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a method and a device for adjusting uplink power, which are used for at least solving the technical problem that User Equipment (UE) in the related technology cannot accurately adjust the transmitting power.
According to an aspect of the embodiments of the present invention, there is provided a method for adjusting uplink power, including: determining a first downlink path loss and a second downlink path loss, wherein the first downlink path loss is measured by User Equipment (UE), and the second downlink path loss is an actual downlink path loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE.
Further, determining the first downlink path loss and the second downlink path loss comprises: receiving uplink Power Headroom (PHR) reported by UE; measuring an uplink power value of the UE through a base station; and determining a first downlink path loss and a second downlink path loss according to the PHR and the uplink power value of the UE.
Further, the base station includes a macro station and a micro station, wherein measuring, by the base station, the uplink power value of the UE includes: measuring an uplink power value from the UE to the macro station through the macro station; and measuring the uplink power value from the UE to the micro station through the micro station.
Further, determining the first downlink path loss and the second downlink path loss according to the PHR and the uplink power value of the UE includes: calculating a first downlink path loss of the UE and actual uplink transmission power of the UE through the PHR; smoothing the uplink power values from the plurality of UE to the macro station to obtain a first smoothing power value, and smoothing the uplink power values from the plurality of UE to the micro station to obtain a second smoothing power value; and determining that the difference between the first smoothing power value and the actual uplink transmission power of the UE is a first actual path loss from the UE to the macro station, and the difference between the second smoothing power value and the actual uplink transmission power of the UE is a second actual path loss from the UE to the micro station, wherein the second downlink path loss comprises the first actual path loss and the second actual path loss.
Further, generating corresponding power adjustment information based on a difference between the first downlink path loss and the second downlink path loss includes: acquiring a first difference value of a first downlink path loss and a first actual path loss and a second difference value of the first downlink path loss and a second actual path loss; corresponding power adjustment information is generated based on the first difference and the second difference.
Further, issuing power adjustment information for adjusting the uplink power of the UE to the UE includes: transmitting RRCConnectionRecofig configuration information carrying power adjustment information to UE; or transmitting the TPC command carrying the power adjustment information to the UE.
Further, generating corresponding power adjustment information based on the first difference and the second difference comprises: obtaining pre-prepared PThr, PThr1, PThr 2; generating power adjustment information for power reduction if the first difference Δ PL1>0, the second difference Δ PL2< (-PThr), and min (Δpl1, Δ PL2) < PThr1, wherein the power adjustment information is transmitted to the UE in the form of RRCConnectionRecofig configuration information; generating power adjustment information for power reduction if Δ PL1>0, (-PThr) Δ PL2< (-PThr) and (-PThr1) ≦ min ((-PL 1, (-PL 2) < (-PThr), wherein the power adjustment information is transmitted as TPC commands; generating power adjustment information for boosting power, if Δ PL1>0, Δ PL2 > PThr, and max (Δ PL1, Δ PL2) ≧ PThr, wherein the power adjustment information is transmitted to the UE in the form of rrcconnectionRecofig; if Δ PL1>0, Δ PL2 > PThr and PThr ≦ max (Δ PL1, Δ PL2) < PThr2, power adjustment information for boosting power is generated, wherein the power adjustment information is transmitted as a TPC command.
According to another aspect of the embodiments of the present invention, there is provided an apparatus for adjusting uplink power, the apparatus including: a determining unit, configured to determine a first downlink path loss and a second downlink path loss, where the first downlink path loss is a downlink path loss measured by a user equipment UE, and the second downlink path loss is an actual downlink path loss; a generating unit, configured to generate power adjustment information based on a difference between a first downlink path loss and a second downlink path loss, where the power adjustment information is used to adjust uplink power of the UE; and the issuing unit is used for issuing the power adjustment information to the UE.
Further, the determination unit includes: a receiving module, configured to receive an uplink power headroom PHR reported by the UE; the measuring module is used for measuring the uplink power value of the UE through the base station; and the determining module is used for determining the first downlink path loss and the second downlink path loss according to the uplink power values of the PHR and the UE.
Further, the base station includes a macro station and a micro station, wherein the measuring module includes: the first measurement submodule is used for measuring the uplink power value from the UE to the macro station through the macro station; and the second measurement submodule is used for measuring the uplink power value from the UE to the micro station through the micro station.
Further, the determining module includes: the calculation submodule is used for calculating the first downlink path loss of the UE and the actual uplink transmission power of the UE through the PHR; the processing sub-module is used for smoothing the uplink power values from the plurality of measured UE to the macro station to obtain a first smooth power value, and smoothing the uplink power values from the plurality of measured UE to the micro station to obtain a second smooth power value; and the determining submodule is used for determining that the difference value between the first smoothing power value and the actual uplink transmission power of the UE is first actual path loss from the UE to the macro station, and the difference value between the second smoothing power value and the actual uplink transmission power of the UE is second actual path loss from the UE to the micro station, wherein the second downlink path loss comprises the first actual path loss and the second actual path loss.
Further, the generation unit includes: the acquisition module is used for acquiring a first difference value between the first downlink path loss and the first actual path loss and a second difference value between the first downlink path loss and the second actual path loss; and the generating module is used for generating corresponding power adjustment information based on the first difference value and the second difference value.
Further, the issuing unit includes: a first sending module, configured to send rrcconnectionreconfiguration information carrying power adjustment information to the UE; and the second issuing module is used for issuing the TPC command carrying the power adjustment information to the UE.
According to another embodiment of the present invention, there is provided a storage medium that may be configured to store program code for performing the steps of: determining a first downlink loss and a second downlink loss, wherein the first downlink loss is measured by User Equipment (UE), and the second downlink loss is an actual downlink loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE.
In the embodiment of the present invention, a first downlink path loss and a second downlink path loss are determined, where the first downlink path loss is a downlink path loss measured by a user equipment UE, and the second downlink path loss is an actual downlink path loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE, thereby solving the technical problem that the UE in the related technology can not accurately adjust the transmitting power and realizing the technical effect of accurately adjusting the transmitting power.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a cell in the related art;
FIG. 2 is a schematic diagram of a computer terminal according to an embodiment of the present invention;
fig. 3 is a flowchart of an uplink power adjustment method according to an embodiment of the present invention;
fig. 4 is a flowchart of an alternative uplink power adjustment method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an uplink power adjustment apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
The method provided by the first embodiment of the present application may be executed in a mobile terminal, a computer terminal, or a similar computing device. Taking the example of running on a computer terminal, as shown in fig. 2, the computer terminal may include one or more (only one shown in the figure) processors 101 (the processors 101 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 103 for storing data, and a transmission device 105 for communication function. It will be understood by those skilled in the art that the structure shown in fig. 2 is only an illustration and is not intended to limit the structure of the electronic device.
The memory 103 may be used to store software programs and modules of application software, such as program instructions/modules corresponding to the control method of the device in the embodiment of the present invention, and the processor 101 executes various functional applications and data processing by running the software programs and modules stored in the memory 103, so as to implement the method described above. The memory may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory may further include memory remotely located from the processor, which may be connected to the computer terminal over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the computer terminal. In one example, the transmission device includes a Network adapter (NIC) that can be connected to other Network devices through a base station to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used to communicate with the internet in a wireless manner.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a method for adjusting uplink power, where the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and where a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than that illustrated.
Fig. 3 is a flowchart of a method for adjusting uplink power according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
step S301, a first downlink loss and a second downlink loss are determined, where the first downlink loss is a downlink loss measured by the UE, and the second downlink loss is an actual downlink loss.
Step S302, generating power adjustment information based on a difference between the first downlink loss and the second downlink loss, where the power adjustment information is used to adjust uplink power of the UE.
Step S303, transmitting power adjustment information to the UE.
By the embodiment, a first downlink loss and a second downlink loss are determined, where the first downlink loss is a downlink loss measured by the UE, and the second downlink loss is an actual downlink loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE, thereby solving the technical problem that the UE cannot accurately adjust the transmitting power in the related technology and realizing the technical effect of accurately adjusting the transmitting power.
Alternatively, the main body of the above steps may be a base station or the like, but is not limited thereto.
In step S301, determining the first downlink loss and the second downlink loss includes: receiving uplink Power Headroom (PHR) reported by UE; measuring an uplink power value of the UE through a base station; and determining a first downlink path loss and a second downlink path loss according to the PHR and the uplink power value of the UE.
Optionally, the base station includes a macro station and a micro station, where measuring, by the base station, the uplink power value of the UE includes: measuring an uplink power value from the UE to the macro station through the macro station; and measuring the uplink power value from the UE to the micro station through the micro station.
And the base station receives uplink Power headroom (PHR, Power Head Room) reported by the UE, and calculates the actual uplink transmission Power of the UE and the PL calculated by the UE side through the PHR.
In an optional embodiment, determining the first downlink path loss and the second downlink path loss according to the PHR and the uplink power value of the UE includes: calculating a first downlink path loss of the UE and actual uplink transmission power of the UE through the PHR; smoothing the measured uplink power values from the plurality of UEs to the macro station to obtain a first smoothed power value, and smoothing the measured uplink power values from the plurality of UEs to the micro station to obtain a second smoothed power value; and determining that a difference value between the first smoothing power value and the actual uplink transmission power of the UE is a macro station path loss (i.e., a first actual path loss), and a difference value between the second smoothing power value and the actual uplink transmission power of the UE is a micro station path loss (i.e., a second actual path loss), wherein the second downlink path loss includes the macro station path loss and the micro station path loss.
In another optional embodiment, generating corresponding power adjustment information based on a difference between the first downlink path loss and the second downlink path loss includes: acquiring a first difference value of a first downlink path loss and a first actual path loss and a second difference value of the first downlink path loss and a second actual path loss; corresponding power adjustment information is generated based on the first difference and the second difference.
And each CP of the super cell obtains an uplink power value of the UE through uplink measurement, and the effective measurement value is smoothed in the measurement window W to respectively obtain the uplink smoothing power values of the macro and micro CPs of the super cell. The macro and micro CP uplink smoothing meter power calculation formula is as follows:
Figure BDA0001049874220000081
wherein, Pref(UEID,CPID)＝PAver(UEID,CPID)/PMAX(UEID)，
Figure BDA0001049874220000082
Is the uplink received power smoothing factor.
Figure BDA0001049874220000083
Is the smoothed value at time (t-1).
PMAX(UEID) And represents the maximum value of the average received power at each CP.
PAver(UEID,CPID) Denotes the average received power of the UE over a single RB on each CP, and the ID is the number of the UE or CP.
The macro micro CP uplink smoothing power calculation formula refers to a method and a system for wireless communication coverage from the patent CN 201210024387. The base station calculates the actual path loss PL of the UE reaching the macro micro CP according to the smooth power value maintained by each CP and the actual uplink transmission power of the UE obtained in the last stepmacro(i.e., macro station Path Loss, PL denotes Path Loss, and is called Path Loss in English) and PLpico(i.e., micro-station path loss).
The base station reaches the actual path loss PL of the macro micro CP according to the UEmacroAnd PLpicoAnd calculating the path loss of the macro station and the path loss of the micro station. Calculating the formula:
Figure BDA0001049874220000084
the path loss of the macro station is shown,
Figure BDA0001049874220000085
Figure BDA0001049874220000086
symbol in formula representing path loss of micro-station
Figure BDA0001049874220000087
Indicating a rounding down.
Optionally, issuing power adjustment information for adjusting the uplink power of the UE to the UE includes: transmitting RRCConnectionRecofig configuration information (namely RRC reconfiguration information) carrying power adjustment information to the UE; or issuing a TPC command (i.e., a command for controlling Transmission Power, which is called Transmission Power Control collectively) carrying Power adjustment information to the UE.
Optionally, generating corresponding power adjustment information based on the first difference and the second difference includes: obtaining pre-prepared PThr, PThr1, PThr 2; generating power adjustment information for power reduction if the first difference Δ PL1>0, the second difference Δ PL2< (-PThr), and min (Δpl1, Δ PL2) < PThr1, wherein the power adjustment information is transmitted to the UE in the form of RRCConnectionRecofig configuration information; generating power adjustment information for power reduction if Δ PL1>0, (-PThr) Δ PL2< (-PThr) and (-PThr1) ≦ min ((-PL 1, (-PL 2) < (-PThr), wherein the power adjustment information is transmitted as TPC commands; generating power adjustment information for boosting power if Δ PL1>0, Δ PL2 > PThr, and max (Δ PL1, Δ PL2) is not less than PThr, wherein the power adjustment information is transmitted to the UE in rrcconnectionreconfiguration; if Δ PL1>0, Δ PL2 > PThr and PThr ≦ max (Δ PL1, Δ PL2) < PThr2, power adjustment information for boosting power is generated, wherein the power adjustment information is transmitted as a TPC command.
Specifically, the base station is based on Δ PL1And Δ PL2And judging the mode of uplink power adjustment of the UE. And adjusting up or down according to the decision power. The decision results are as follows:
decision 1: if max (| Δ PL)1|,|ΔPL2|)<PThr, no power adjustment is performed.
PThr is the decision threshold value for power adjustment.
And decision 2: if Δ PL1>0，ΔPL2<-Pthr, and Δ PL ═ min (Δ PL)1,ΔPL2) Less than or equal to Pthr1, reassortant P by sending RRCConnectionRecofig0_ueFast reduction of power, P0_ueAnd the base station sends the power reference value to the UE. The base station firstly judges whether the reconfiguration timer is overtime or not, and if not, the reconfiguration timer is executed according to decision 3; if time out, initialize f (i) 0 and reconfiguration timer, and calculate P to be reconfigured to UE0_ueValue of P0_ue＝max(ΔPL+f(i)+P'0_ue,8) Of which is P'0_ueMost initial P for each UE maintained by base station0_ue。
And 3, judgment: if Δ PL1>0，ΔPL2<-Pthr and-PThr1≤min(ΔPL1,ΔPL2)<PThr, then power is adjusted downward by issuing TPC commands, where Δ PL ═ min (Δ PL)1,ΔPL2). Base station calculates down-sending deltaPUSCHThe TPC number N ═ Δ PL |, of-1, and f (i) ═ f (i) + δ is updated after each adjustmentPUSCH(i)。
And 4, decision: if Δ PL1>0，ΔPL2>PThr and Δ PL ═ max (Δ PL)1,ΔPL2) If not less than PThr, reassortment of P is carried out by issuing RRCConnectionRecofig0_ueThe power is boosted quickly. The base station firstly judges whether the reconfiguration timer is overtime or not, and if not, the reconfiguration timer is executed according to decision 5; if timeout, reinitializing f (i) ═ 0 and the reconfiguration timer, and calculating P to be reconfigured to the UE0_ueValue of P0_ue＝min(ΔPL+f(i)+P'0_ue,7) Wherein, P'0_ueP maintained for pre-reconfiguration base stations0_ue。
And 5, decision: if Δ PL1>0，ΔPL2>PTHr and PTHr ≦ max (Δ PL)1,ΔPL2)<PThr2Then, the power is adjusted up by issuing TPC command, where Δ PL equals max (Δ PL)1,ΔPL2). Base station calculates down-sending deltaPUSCHThe number of times N1 of TPC of 3 ═ Δ PL/3|, and the delivery δPUSCHThe number of TPC times of 1, N2, is Δ PL-3N 1. Updating f (i) ═ f (i) + delta after each adjustmentPUSCH(i)。
Threshold values in the above decision: PThr, PThr1 and PThr2, which are decision threshold values for power adjustment, used to determine whether the power is increasing or decreasing, and determine which manner to adjust, the three parameters are obtained comprehensively according to simulation and actual test results, and multiple factors such as the radii of the macro station CP and the micro station CP, the cell reference signal power, the channel quality, the active set, and the like need to be considered.
And the base station transmits a reconfiguration or TPC command to the UE according to the power control judgment result and the power calculation result.
In the above embodiment, in the scenario of macro-micro heterogeneous super cell, compared with the prior art, the method overcomes the defect of insufficient power control adjustment of the existing PUSCH transmission power method, reduces the waste of uplink power when the mobile UE moves in the hot spot range, and reduces the risk of network uplink performance degradation and uplink desynchronization of the mobile UE.
Embodiments of the present application are described in detail below with reference to specific application scenarios.
Application example 1
Scene description: the reference signal broadcasted by the super cell is the reference signal power value transmitted by the Macro station RRU, and the UE moves from the Macro CP0 to the Micro CP 1.
Step S401, the UE reports the PHR after entering the Micro CP1, and the base station receives the PHR reported by the UE.
Step S402, the base station estimates the 'calculation path loss' of the UE and the actual transmitting power of the UE according to the PHR reported by the UE.
Step S403, the base station obtains "actual path loss" from the UE to the macro-micro CP according to the actual transmit power of the UE and the smoothing power value maintained by each CP in the measurement window W. Namely, the 'actual path loss value' from the UE to the macro micro CP is calculated according to the actual transmitting power of the UE and the smoothing power value maintained by each CP in the measurement window W.
In step S404, the base station calculates the path loss difference between the macro CP and the micro CP based on the calculated path loss and the actual path loss of the macro CP. Namely, the path loss difference of the macro CP is calculated according to the calculated path loss value and the actual path loss value.
Step S405, according to the path loss difference of the macro CP, determining whether the threshold of power down-regulation is reached, if yes, performing step S408, otherwise, performing step S406. Since the UE enters the Micro CP1, the calculated path loss value is larger than the actual path loss value, the threshold of power down regulation is reached, and the next step is carried out.
Step S408, if the UE transmission power is down-regulated by using the reconfiguration P0, if yes, step S409 is executed, otherwise step S412 is executed. The mode of judging the power of the UE to be down-regulated is taken from the smaller value in the macro-micro CP path loss difference, and the judgment adopts the sending of the reassortment P under the assumption that the calculated path loss value of the UE is more different from the actual path loss value0_ueIn order to adjust the power of the UE downward.
Step S409, judging whether the reconfiguration timer is overtime, if not, executing step S412, adjusting the power by issuing TPC, if the reconfiguration timer is overtime, entering the next step, and executing step S410.
Step S410, calculating new P according to the path loss difference0_ueInitial f (i) ═ 0 and restart the reconfiguration timer.
Step S411, the base station sends down a new P0_ueThe reconfiguration signaling of (2) rapidly reduces the transmit power of the UE.
Step S412, the power is adjusted downwards in a TPC issuing mode, and the number N of TPC issuing is calculated.
In step S413, TPC is continuously issued N times.
Application example 2
Scene description: the reference signal broadcasted by the super cell is the reference signal power value transmitted by the Micro station RRU, and the UE is moved from the Micro CP1 to the mobile Macro CP 0.
Step S401, the UE reports the PHR after entering the Macro CP0, and the base station receives the PHR reported by the UE.
Step S402, the base station estimates the 'calculation path loss' of the UE and the actual transmitting power of the UE according to the PHR reported by the UE.
In step S403, the base station calculates an "actual path loss value" from the UE to the macro-micro CP according to the actual transmit power of the UE and the smoothing power value maintained by each CP in the measurement window W.
In step S404, the base station calculates the path loss difference between the macro CP and the micro CP based on the calculated path loss and the actual path loss of the macro CP. Namely, the base station calculates the path loss difference of the macro CP according to the calculated path loss value and the actual path loss value.
Step S405, according to the path loss difference of the macro CP, determining whether the threshold of power down-regulation is reached, if yes, performing step S408, otherwise, performing step S406. Since the UE enters the Macro CP0 at this time, the calculated path loss value is smaller than the actual path loss value, the threshold of power down regulation cannot be reached, and the next step is carried out.
Step S406, it is determined again whether the path loss difference of the macro-micro CP reaches the threshold of power up-regulation, if yes, step S407 is executed, otherwise, step S401 is executed. And (4) reaching a power upper regulation threshold and entering the next step because the calculated path loss value is smaller than the actual path loss value.
Step S407, whether to use reconfiguration P0 to up-regulate UE transmission power. If yes, step S409 is performed, otherwise step S412 is performed. And judging a mode of adjusting the power of the UE downwards by taking a smaller value in the macro-micro CP path loss difference, and judging to adjust the power of the UE upwards by adopting a mode of issuing a TPC command on the assumption that the difference between the calculated path loss value and the actual path loss value of the UE is smaller.
Step S412, calculating the number of times of issuing the TPC according to the path loss difference.
In step S413, the base station issues N consecutive TPC commands.
In summary, compared with the prior art, the closed-loop uplink power control method and system provided in the above embodiments improve the UE power calculation method for macro-micro heterogeneous super cells, reduce uplink power waste when the mobile UE moves in a hot spot range, and reduce the risk of network uplink performance degradation and uplink desynchronization of the mobile UE.
Through the above description of the embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
The embodiment of the invention also provides a device for adjusting the uplink power. The device is used for implementing the above embodiments and preferred embodiments, and the description of the device is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a schematic diagram of an uplink power adjustment apparatus according to an embodiment of the present invention. As shown in fig. 5, the apparatus may include: a determining unit 51, a generating unit 52 and a issuing unit 53.
The determining unit 51 is configured to determine a first downlink loss and a second downlink loss, where the first downlink loss is a downlink loss measured by the UE, and the second downlink loss is an actual downlink loss.
A generating unit 52, configured to generate power adjustment information based on a difference between the first downlink loss and the second downlink loss, where the power adjustment information is used to adjust uplink power of the UE.
And an issuing unit 53, configured to issue the power adjustment information to the UE.
With the above embodiment, the determining unit determines a first downlink path loss and a second downlink path loss, where the first downlink path loss is a downlink path loss measured by the UE, and the second downlink path loss is an actual downlink path loss; the generating unit generates power adjustment information based on a difference value between the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting the uplink power of the UE; the sending unit sends the power adjustment information to the UE, so that the technical problem that the UE in the related technology cannot accurately adjust the transmitting power is solved, and the technical effect of accurately adjusting the transmitting power is realized.
In the above embodiment, the determination unit includes: the receiving module is used for receiving the uplink power headroom PHR reported by the UE; the measuring module is used for measuring the uplink power value of the UE through the base station; and the determining module is used for determining the first downlink path loss and the second downlink path loss according to the PHR and the uplink power value of the UE.
Optionally, the base station includes a macro station and a micro station, wherein the measurement module includes: the first measurement submodule is used for measuring the uplink power value from the UE to the macro station through the macro station; and the second measurement submodule is used for measuring the uplink power value from the UE to the micro station through the micro station.
In an alternative embodiment, the determining module includes: the calculation submodule is used for calculating the first downlink path loss of the UE and the actual uplink transmission power of the UE through the PHR; the processing sub-module is used for smoothing the uplink power values from the plurality of measured UE to the macro station to obtain a first smooth power value, and smoothing the uplink power values from the plurality of measured UE to the micro station to obtain a second smooth power value; and the determining submodule is used for determining that a difference value between the first smoothing power value and the actual uplink transmission power of the UE is a first actual path loss (namely, macro station path loss), and a difference value between the second smoothing power value and the actual uplink transmission power of the UE is a first actual path loss (namely, micro station path loss), wherein the second downlink path loss comprises macro station path loss and micro station path loss.
In another alternative embodiment, the generating unit includes: the acquisition module is used for acquiring a first difference value between the first downlink path loss and the first actual path loss and a second difference value between the first downlink path loss and the second actual path loss; and the generating module is used for generating corresponding power adjustment information based on the first difference value and the second difference value.
Optionally, the issuing unit includes: a first sending module, configured to send rrcconnectionreconfiguration information carrying power adjustment information to the UE; and the second issuing module is used for issuing the TPC command carrying the power adjustment information to the UE.
In summary, it can be seen that, compared with the prior art, the closed-loop uplink power control method and system provided in the above embodiments improve the UE power calculation method of the macro-micro heterogeneous super cell, reduce uplink power waste when the mobile UE moves in a hot spot range, and reduce the risk of network uplink performance degradation and uplink desynchronization of the mobile UE.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are located in different processors in any combination.
Example 3
The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for performing the following steps:
s1, determining a first downlink path loss and a second downlink path loss, wherein the first downlink path loss is measured by the UE, and the second downlink path loss is the actual downlink path loss;
s2, generating power adjustment information based on the difference value between the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting the uplink power of the UE;
s3, sending down power adjustment information to UE.
Optionally, the storage medium is further arranged to store program code for performing the steps of:
s4, receiving an uplink Power Headroom (PHR) reported by the UE; measuring an uplink power value of the UE through a base station;
and S5, determining a first downlink path loss and a second downlink path loss according to the uplink power value of the PHR and the UE.
Optionally, in this embodiment, the storage medium may include but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Optionally, in this embodiment, the processor executes, according to the program code stored in the storage medium: determining a first downlink path loss and a second downlink path loss, wherein the first downlink path loss is measured by User Equipment (UE), and the second downlink path loss is an actual downlink path loss; generating power adjustment information based on a difference value of the first downlink path loss and the second downlink path loss, wherein the power adjustment information is used for adjusting uplink power of the UE; and sending the power adjustment information to the UE.
Optionally, in this embodiment, the processor executes, according to the program code stored in the storage medium: receiving an uplink Power Headroom (PHR) reported by UE; measuring an uplink power value of the UE through a base station; and determining a first downlink path loss and a second downlink path loss according to the PHR and the uplink power value of the UE.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A method for adjusting uplink power, comprising:
determining a first downlink path loss and a second downlink path loss, wherein the first downlink path loss is measured by User Equipment (UE), and the second downlink path loss is an actual downlink path loss;
generating power adjustment information based on a first difference value and a second difference value when the first difference value and the second difference value and a decision threshold value meet a certain condition, wherein the power adjustment information is used for adjusting uplink power of the UE;
issuing the power adjustment information to the UE;
wherein determining the first downlink path loss and the second downlink path loss comprises:
receiving an uplink Power Headroom (PHR) reported by the UE;
measuring an uplink power value of the UE through a base station;
determining the first downlink path loss and the second downlink path loss according to the PHR and the uplink power value of the UE;
wherein the base station comprises a macro station and a micro station;
determining the first downlink path loss and the second downlink path loss according to the PHR and the uplink power value of the UE includes:
calculating a first downlink path loss of the UE and an actual uplink transmission power of the UE through the PHR;
smoothing the uplink power values from the plurality of the UE to the macro station to obtain a first smoothing power value, and smoothing the uplink power values from the plurality of the UE to the micro station to obtain a second smoothing power value;
determining a difference value between the first smoothing power value and actual uplink transmission power of the UE as a first actual path loss from the UE to a macro station, and determining a difference value between the second smoothing power value and actual uplink transmission power of the UE as a second actual path loss from the UE to a micro station, where the second downlink path loss includes the first actual path loss and the second actual path loss;
wherein the first difference is used to indicate a difference between the first downlink loss and the first actual loss, and the second difference is used to indicate a difference between the first downlink loss and the second actual loss;
wherein the decision threshold value comprises at least one of: PThr, PThr1, PThr 2.
2. The method of claim 1, wherein measuring, by the base station, the uplink power value of the UE comprises:
measuring, by the macro station, an uplink power value of the UE to the macro station;
and measuring an uplink power value of the UE to the micro station through the micro station.
3. The method of claim 1, wherein generating corresponding power adjustment information based on the first difference and the second difference comprises:
obtaining the first difference between the first downlink path loss and the first actual path loss, and the second difference between the first downlink path loss and the second actual path loss;
generating the corresponding power adjustment information based on the first difference and the second difference.
4. The method of claim 3, wherein sending the power adjustment information for adjusting the uplink power of the UE to the UE comprises:
transmitting RRCConnectionRecofig configuration information carrying the power adjustment information to the UE; or
And issuing a TPC command carrying the power adjustment information to the UE.
5. The method of claim 4, wherein generating corresponding power adjustment information based on the first difference and the second difference comprises:
obtaining pre-prepared PThr, PThr1, PThr 2;
generating power adjustment information for power reduction if the first difference Δ PL1>0, the second difference Δ PL2< (-PThr), and min (Δ PL1, Δ PL2) < PThr1, wherein the power adjustment information is transmitted to the UE as RRCConnectionRecofig configuration information;
generating power adjustment information for power reduction if Δ PL1>0, (-PThr) Δ PL2< (-PThr) and (-PThr1) ≦ min ((-PL 1, (-PL 2) < (-PThr), wherein the power adjustment information is transmitted as TPC commands;
generating power adjustment information for boosting power, if Δ PL1>0, Δ PL2 > PThr, and max (Δ PL1, Δ PL2) ≧ PThr, wherein the power adjustment information is transmitted to the UE in RRCConnectionRecofig;
if Δ PL1>0, Δ PL2 > PThr and PThr ≦ max (Δ PL1, Δ PL2) < PThr2, power adjustment information for boosting power is generated, wherein the power adjustment information is transmitted as a TPC command.
6. An apparatus for adjusting uplink power, comprising:
a determining unit, configured to determine a first downlink path loss and a second downlink path loss, where the first downlink path loss is a downlink path loss measured by a user equipment UE, and the second downlink path loss is an actual downlink path loss;
a generating unit, configured to generate power adjustment information based on a first difference and a second difference when the first difference and the second difference and a decision threshold satisfy a certain condition, where the power adjustment information is used to adjust uplink power of the UE;
the issuing unit is used for issuing the power adjustment information to the UE;
wherein the determination unit includes:
a receiving module, configured to receive an uplink power headroom PHR reported by the UE;
a measuring module, configured to measure, by a base station, an uplink power value of the UE;
a determining module, configured to determine the first downlink path loss and the second downlink path loss according to the PHR and an uplink power value of the UE;
wherein the base station comprises a macro station and a micro station;
the determining module comprises:
the calculation submodule is used for calculating the first downlink path loss of the UE and the actual uplink transmission power of the UE through the PHR;
the processing sub-module is used for smoothing the uplink power values from the plurality of measured UEs to the macro station to obtain a first smooth power value, and smoothing the uplink power values from the plurality of measured UEs to the micro station to obtain a second smooth power value;
a determining submodule, configured to determine that a difference between the first smoothing power value and actual uplink transmission power of the UE is a first actual path loss from the UE to a macro station, and determine that a difference between the second smoothing power value and actual uplink transmission power of the UE is a second actual path loss from the UE to a micro station, where the second downlink path loss includes the first actual path loss and the second actual path loss;
wherein the first difference is used to indicate a difference between the first downlink loss and the first actual loss, and the second difference is used to indicate a difference between the first downlink loss and the second actual loss;
wherein the decision threshold value comprises at least one of: PThr, PThr1, PThr 2.
7. The apparatus of claim 6, wherein the measurement module comprises:
a first measurement sub-module, configured to measure, by the macro station, an uplink power value from the UE to the macro station;
and the second measurement submodule is used for measuring the uplink power value from the UE to the micro station through the micro station.
8. The apparatus of claim 6, wherein the generating unit comprises:
an obtaining module, configured to obtain the first difference between the first downlink path loss and the first actual path loss, and obtain the second difference between the first downlink path loss and the second actual path loss;
a generating module, configured to generate the corresponding power adjustment information based on the first difference and the second difference.
9. The apparatus of claim 8, wherein the issuing unit comprises:
a first sending module, configured to send RRCConnectionRecofig configuration information carrying the power adjustment information to the UE;
and the second issuing module is used for issuing the TPC command carrying the power adjustment information to the UE.
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