WO2014205747A1

WO2014205747A1 - Power control method and device

Info

Publication number: WO2014205747A1
Application number: PCT/CN2013/078229
Authority: WO
Inventors: 汪喆; 李广俊
Original assignee: 华为技术有限公司
Priority date: 2013-06-27
Filing date: 2013-06-27
Publication date: 2014-12-31
Also published as: CN103718624B; CN103718624A

Abstract

Embodiments of the present invention provide a power control method and device, which relate to the field of communications and can coordinate interference between user equipments and increase cell throughput. The method comprises: a base station receiving a power headroom report reported by a user equipment, and the base station obtaining a second transmit power headroom according to a first transmit power headroom in the power headroom report and a preset parameter, and then the base station performing power control on the user equipment according to a second transmit power headroom; or the base station sending a message to a user equipment through an air interface, the message comprising a preset parameter and the preset parameter being used for determining a second transmit power headroom of the user equipment, and then, the base station receiving a power headroom report reported by the user equipment, and performing power control on the user equipment according to the second transmit power headroom in the power headroom report. The embodiments of the present invention are used for power control in macro and micro networking.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and an apparatus for power control. Background technique

With the development of mobile broadband, the widespread application of various intelligent terminals has led to the rapid growth of data services. Even the LTE (Long Term Evolution) network cannot fully meet the future mobile data requirements, especially the hot area capacity, blind spots. Coverage, indoor coverage, etc. will place higher demands on existing macrocell architectures. The small cell (microcell) architecture effectively improves network capacity and coverage. Macro-synchronous heterogeneous networking is an effective method to solve hotspot capacity and blind spot coverage. With the increasing popularity of the macro-micro network construction method, while bringing capacity gain, it also creates a problem that cannot be ignored and co-channel interference. When the same-frequency interference is serious, not only the overall capacity of the cell is reduced, but also the user power is raised. The user equipment is more powerful, the interference is larger, and it is easy to trigger a series of network problems such as user equipment falling off and network access difficulties.

EICIC (Enhanced Inter Cell Interference Coordination) is interference coordination in the time domain. When macro and micro are co-networked, some sub-frames are divided into AB S (AlmostBlank Subframe). come out. When an AB S subframe occurs, the macro station does not schedule the user equipment it serves, so that the user equipment served by the macro station reduces interference to the user equipment served by the micro station from the time domain. When entering a non-AB S subframe, the micro station does not schedule the user equipment it serves, so that the user equipment served by the micro station reduces interference to the user equipment of the macro station service from the time domain, but when applying the scheme The gain of the cell traffic is not obvious.

SUMMARY OF THE INVENTION Embodiments of the present invention provide a power control method and apparatus to solve the problem that the gain of cell traffic is not obvious due to interference between user equipments. A first aspect of the present invention provides a power control method, including: Receiving, by the base station, a power headroom report reported by the user equipment, where the power headroom report includes a first transmit power margin of the user equipment; and the base station according to the preset parameter and the first transmit power in the power headroom report a margin, obtaining a second transmit power margin;

The base station performs power control on the user equipment according to the second transmit power margin.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the base station performing power control on the user equipment according to the second transmit power margin includes:

When the power spectrum density of the user equipment is unchanged, the base station acquires, according to the second transmit power margin, the number of resource blocks scheduled for the user equipment;

If the number of the resource blocks is smaller than the second preset parameter, the base station sends a power control command word to the user equipment, where the power control command word is used to instruct the user equipment to reduce the actual transmit power.

With reference to the first possible implementation of the first aspect, in a second possible implementation manner, the method further includes: determining, by the base station, the second preset parameter according to the number of users served and the transmission bandwidth.

With reference to the first aspect to the second possible implementation manner of the first aspect, in a third possible implementation manner, the second transmit power margin is the first transmit power margin and the preset parameter The difference.

With reference to the first aspect to the third possible implementation manner of the first aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power and an actual transmit power of the user equipment. .

With reference to the first aspect to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A second aspect of the present invention provides a power control method, including:

The base station sends a message to the user equipment over the air interface, where the message includes a preset parameter The preset parameter is used to determine a second transmit power margin of the user equipment; the base station receives a power headroom report reported by the user equipment, where the power headroom report includes the second transmit power The base station performs power control on the user equipment according to the second transmit power margin.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the base station performing power control on the user equipment according to the second transmit power margin includes: when a power spectral density of the user equipment When the base station is unchanged, the base station acquires the number of resource blocks scheduled for the user equipment according to the second transmit power margin;

With reference to the first possible implementation of the second aspect, in a second possible implementation manner, the method further includes: determining, by the base station, the second preset parameter according to the number of users served and the transmission bandwidth.

With the second aspect to the second possible implementation manner of the second aspect, in a third possible implementation manner, the second transmit power margin is equal to a first transmit power margin, or the second transmit The power headroom is equal to the difference between the first transmit power margin and the preset parameter. The first transmit power margin is the transmit power of the user equipment when the user equipment receives the message. the amount.

In conjunction with the third possible implementation of the second aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the second aspect to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A third aspect of the present invention provides a power control method, including: The user equipment receives a message sent by the base station over the air interface, where the message includes a preset parameter;

The user equipment acquires a second transmit power margin according to the preset parameter and a first transmit power margin of the user equipment;

The user equipment reports a power headroom report to the base station, where the power headroom report includes the second transmit power margin; the user equipment receives a power control command word from the base station, where the power command word is used by the user equipment Controlling the transmit power of the user equipment.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the method further includes: the user equipment adjusting the actual transmit power according to the power control command word. With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the second transmit power margin is equal to the first transmit power margin, or The second transmit power margin is equal to a difference between the first transmit power margin and the preset parameter;

The first transmit power margin is a transmit power margin of the user equipment when the user equipment receives the message.

In conjunction with the second possible implementation of the third aspect, in a third possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the third aspect to the third possible implementation manner of the third aspect, in a fourth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A fourth aspect of the present invention provides a base station, including:

a receiving unit, configured to receive a power headroom report reported by the user equipment, where the power headroom report includes a first transmit power margin of the user equipment;

a processing unit, configured to acquire a second transmit power margin according to the preset parameter and the first transmit power margin in the power headroom report;

a control unit, configured to enter the user equipment according to the second transmit power margin Line power control. With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the control unit includes a first subunit and a second subunit; the first subunit is configured to: when the power of the user equipment Obtaining, according to the second transmit power margin, the number of resource blocks scheduled for the user equipment, and determining whether the number of resource blocks is smaller than a second preset parameter;

The second subunit is configured to: when the first subunit determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word And used to instruct the user equipment to reduce the actual transmit power. With reference to the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the processing unit is further configured to: determine, according to the number of users of the service and the transmission bandwidth, the second preset parameter, and provide Give the control unit. With reference to the second possible implementation manner of the fourth aspect to the fourth aspect, in a third possible implementation manner, the second transmit power margin is the first transmit power margin and the preset parameter The difference.

With reference to the third aspect to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power and an actual transmit power of the user equipment. .

With reference to the fourth aspect to the fourth possible implementation manner of the fourth aspect, in a fifth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A fifth aspect of the present invention provides a base station, including:

a sending unit, configured to send a message to the user equipment by using an air interface, where the message includes a preset parameter, where the preset parameter is used to determine a second transmit power margin of the user equipment;

a receiving unit, configured to receive a power headroom report reported by the user equipment, where the power headroom report includes the second transmit power margin;

a control unit, configured to enter the user equipment according to the second transmit power margin Line power control. With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the control unit includes a third subunit and a fourth subunit;

The third subunit is configured to: when the power spectrum density of the user equipment is unchanged, acquire a quantity of resource blocks scheduled for the user equipment according to the second transmit power margin, and determine the resource block Whether the quantity is less than the second preset parameter;

The fourth subunit is configured to: when the third subunit determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word And used to instruct the user equipment to reduce the actual transmit power. With reference to the first possible implementation manner of the fifth aspect, in a second possible implementation manner, the processing unit is further configured to: determine the second preset parameter according to the number of users of the service and the transmission bandwidth, and provide the second preset parameter Said control unit. With reference to the second possible implementation manner of the fifth aspect to the fifth aspect, in a third possible implementation manner, the second transmit power margin is equal to a first transmit power margin, or the second transmit The power headroom is equal to a difference between the first transmit power margin and the preset parameter;

With reference to the third possible implementation manner of the fifth aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the fifth possible aspect of the fifth aspect to the fifth aspect, in a fifth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A sixth aspect of the present invention provides a user equipment, including:

a receiving unit, configured to receive a message sent by the base station by using an air interface, where the message includes a preset parameter, and an acquiring unit, configured to acquire a second transmit power according to the preset parameter and a first transmit power margin of the user equipment Balance; and, a reporting unit, configured to report a power headroom report to the base station, where the power headroom report includes the second transmit power margin;

The receiving unit is further configured to receive a power control command word from the base station, where the power command word is used to control a transmit power of the user equipment.

In conjunction with the sixth aspect, in a first possible implementation manner of the sixth aspect, the method further includes:

And a processing unit, configured to adjust the actual transmit power according to the power control command word. With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the second transmit power margin is equal to the first transmit power margin, or The second transmit power margin is equal to a difference between the first transmit power margin and the preset parameter;

The first transmit power margin is a transmit power margin of the user equipment when the receiving unit receives the message.

In conjunction with the second possible implementation of the sixth aspect, in a third possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the third possible implementation manner of the sixth aspect to the sixth aspect, in a fourth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A seventh aspect of the present invention provides a base station, including:

a receiver, configured to receive a power headroom report reported by the user equipment, where the power headroom report includes a first transmit power margin of the user equipment;

a processor, configured to acquire a second transmit power margin according to the preset parameter and the first transmit power margin in the power headroom report, and perform power on the user equipment according to the second transmit power margin control. With reference to the seventh aspect, in a first possible implementation manner of the seventh aspect, the processor is specifically configured to: when the power spectral density of the user equipment is constant, according to the second transmit power margin, Obtaining a quantity of resource blocks scheduled for the user equipment; Determining whether the number of resource blocks is smaller than a second preset parameter, if yes, instructing the transmitter to send a power control command word to the user equipment, where the power control command word is used to instruct the user equipment to reduce the actual transmit power .

With reference to the first possible implementation manner of the seventh aspect, in a second possible implementation manner, the processor is further configured to: determine the second preset parameter according to the number of users of the service and the transmission bandwidth. With reference to the second possible implementation manner of the seventh aspect to the seventh aspect, in a third possible implementation manner, the second transmit power margin is equal to a first transmit power margin, or the second transmit The power headroom is equal to a difference between the first transmit power margin and the preset parameter;

With reference to the third possible implementation manner of the seventh aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the fourth possible implementation manner of the seventh aspect to the seventh aspect, in a fifth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. An eighth aspect of the present invention provides a base station, including:

a transmitter, configured to send a message to the user equipment by using an air interface, where the message includes a preset parameter, where the preset parameter is used to determine a second transmit power margin of the user equipment;

a receiver, configured to receive a power headroom report reported by the user equipment, where the power headroom report includes the second transmit power margin; and

And a processor, configured to perform power control on the user equipment according to the second transmit power margin. With reference to the eighth aspect, in a first possible implementation manner of the eighth aspect, the processor is specifically configured to:

When the power spectral density of the user equipment is constant, according to the second transmit power a balance, obtaining a quantity of resource blocks scheduled for the user equipment;

Determining whether the number of resource blocks is smaller than a second preset parameter, if yes, instructing the transmitter to send a power control command word to the user equipment, where the power control command word is used to instruct the user equipment to reduce the actual Transmit power.

In conjunction with the first possible implementation of the eighth aspect, in a second possible implementation manner, the processor is further configured to: determine the second preset parameter according to the number of users serving and the transmission bandwidth. With reference to the second possible implementation manner of the eighth aspect to the eighth aspect, in a third possible implementation manner, the second transmit power margin is equal to a first transmit power margin, or the second transmit The power headroom is equal to the difference between the first transmit power margin and the preset parameter. The first transmit power margin is the transmit power of the user equipment when the user equipment receives the message. the amount.

In conjunction with the third possible implementation manner of the eighth aspect, in a fourth possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the fourth possible implementation manner of the eighth aspect to the eighth aspect, in the fourth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. A ninth aspect of the present invention provides a user equipment, including:

a receiver, configured to receive, by the base station, a message sent by using an air interface, where the message includes a preset parameter;

a processor, configured to acquire a second transmit power margin according to the preset parameter and a first transmit power margin of the user equipment;

a transmitter, configured to report a power headroom report to the base station, where the power headroom report includes the second transmit power margin;

The receiver is further configured to receive a power control command word from the base station, where the power command word is used to control a transmit power of the user equipment.

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, The processor is further configured to: adjust the actual transmit power according to the power control command word. With reference to the first possible implementation manner of the ninth aspect, in a second possible implementation manner, the second transmit power margin is equal to the first transmit power margin, or the second transmit power balance The amount is equal to a difference between the first transmit power margin and the preset parameter;

In conjunction with the second possible implementation manner of the ninth aspect, in a third possible implementation manner, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

With reference to the third possible implementation manner of the ninth to ninth aspects, in the fourth possible implementation manner, the preset parameter ranges from 0 to 23 decibels. An embodiment of the present invention provides a power control method and device, where a base station receives a power headroom report reported by a user equipment, where the power headroom report includes a first transmit power margin of the user equipment, and the base station reports according to the preset parameter and the power headroom report. a first transmit power margin, obtain a second transmit power margin, and then perform power control on the user equipment according to the second transmit power margin, or the base station sends a message to the user equipment over the air interface, where the message includes a preset parameter, The parameter is used to determine a second transmit power margin of the user equipment, and the base station receives the power headroom report reported by the user equipment, where the power headroom report includes a second transmit power margin, and the base station compares the second transmit power margin to the user equipment. Power control can coordinate interference between user equipments and improve cell throughput.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flowchart of a power control method according to an embodiment of the present invention; FIG. 2 is a schematic flowchart of a power control method according to another embodiment of the present invention; FIG. 3 is a schematic diagram of changes in cell throughput and preset difference according to another embodiment of the present invention; FIG.

FIG. 4 is a schematic flow chart of a power control method according to another embodiment of the present invention; FIG.

FIG. 5 is a schematic structural diagram of a base station according to another embodiment of the present invention; FIG. 6 is a schematic structural diagram of another base station according to another embodiment of the present invention; FIG. 7 is a schematic structural diagram of a base station according to another embodiment of the present invention; FIG. 8 is a schematic structural diagram of another base station according to another embodiment of the present invention; FIG. 9 is a schematic structural diagram of a user equipment according to another embodiment of the present invention; FIG. 1 is a schematic structural diagram of a base station according to another embodiment of the present invention; FIG. 12 is a schematic structural diagram of a user equipment according to another embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Under the macro-station hybrid network, the UE (User Equipment) in the Micro eNB (Micro evolved NodeB) can easily interfere with the UE in the Macro eNB (Macro eNB). The SINR (Signal to Interference plus Noise Ratio) of the user equipment of the macro station is reduced, and the rate is decreased. The cell power control does not coordinate the inter-cell interference well under the heterogeneous network, and the cell is reduced. The overall capacity of the UE may cause the power of the UE to rise to each other. The greater the UE's power in the micro-cell, the greater the interference to the UE in the macro-cell, and the network problems such as the UE's dropped network and network access difficulties in the macro-cell. . An embodiment of the present invention provides a power control method, as shown in FIG. 1 , including: 101. A base station receives a power headroom report reported by a user equipment, and a power headroom report. The first transmit power margin of the user equipment is included. The base station here is a Micro eNB micro station, and the user equipment is a UE in a micro station cell. The UE can periodically report the PHR (Power Headroom Report) to the micro station through the MCE (MAC-Control Element, MAC Control Unit). The PHR includes a first transmit power margin of the UE, and the first transmit power margin is a difference between the maximum transmit power of the UE and the actual transmit power. Among them, MAC (Media Access Control) is the physical medium responsible for controlling and connecting the physical layer.

The PHR is initiated on the PUSCH (Physical Uplink Shared Channel), and the PHR is sent to the base station when the UE satisfies the PUSCH transmission condition. The conditions for initiating a PHR can be divided into three types, and any one of the conditions can trigger the escalation. One is the prohibit timer overflow, and the path loss is greater than the RRC (Radio Resource Control, Radio Resource Control) when the path loss is sent when the PHR was sent last time; pathchange (path change) The second is the periodic timer overflow. The third is that the UE receives the RRC reconfiguration message. The message contains the phr config configuration. The UE needs to include the PHR when sending the PUSCH for the first time. The conditions here can also be other trigger conditions, which are not limited here. The PHR can occupy 6 bits, and can be reported to the base station for the I s clock UE, or can be set for other times, which is not limited herein.

102. The base station acquires a second transmit power margin according to the preset transmit power and the first transmit power margin in the power headroom report. For example, after receiving the PHR reported by the UE, the eNB subtracts the preset power parameter Po from the transmit power margin value in the PHR to obtain a second transmit power margin. In this way, the eNB reports that the PHR reported by the UE is reduced, and the eNB pseudo-amplifies the current transmit power of the UE, so that the eNB controls the transmit power of the UE, so that the transmit power of the UE is reduced.

The value of Po can range from 0 to 23, for example, 0, 13, and so on. According to different scenarios (dense area, open area), etc., through the network network optimization simulation, the optimal parameters are obtained to obtain the positive gain of the cell throughput. Optionally, the unit of Po in each embodiment of the present invention is decibel (dB), which will not be described later.

103. The base station performs power control on the user equipment according to the second transmit power margin. Exemplarily, after the eNB obtains the second transmit power margin, the eNB may acquire the number of RBs (Resource Blocks) that the eNB schedules for the UE according to the updated PHR, under the condition that the power density of the UE is unchanged. Then, the eNB compares the number of RBs of the UE with the second preset parameter of the eNB. If the number of resource blocks is smaller than the second preset parameter, the eNB sends a power control command word f(i) to the UE, where the power control command word It is used to instruct the UE to reduce the actual transmit power. The eNB determines a second preset parameter according to the number of users of the service and the transmission bandwidth.

In this way, the eNB sends a power control command word to the UE, instructing the UE to reduce the actual transmit power, that is, the UE performs power control adjustment by the control of the eNB, and limits the actual transmit power of the UE in the micro-cell, so that the intra-cell is in the micro-cell. The UE's transmit power is reduced to reduce the interference of the UE in the micro-cell cell to the UE in the macro-cell cell to improve the throughput of the overall cell. When the number of RBs is greater than the second preset parameter, the eNB sends a power control command word to the UE, where the power control command word is used to raise the transmit power of the UE. An embodiment of the present invention provides a power control method, where a base station receives a power headroom report reported by a user equipment, where the power headroom report includes a first transmit power margin of the user equipment, and further, according to the preset parameter and the power headroom report. The first transmit power margin is used to obtain a second transmit power margin, and the base station performs power control on the user equipment according to the second transmit power margin, which can coordinate interference between user equipments and improve cell throughput. An embodiment of the present invention provides a power control method, as shown in FIG. 2, including:

201. The base station sends a message to the user equipment by using an air interface, where the message includes a preset parameter, where the preset parameter is used to determine a second transmit power margin of the user equipment.

The base station here is a Micro eNB micro station, and the user equipment is a UE in a micro station cell. Exemplarily, the protocol field of the eNB may be changed or added, so that the eNB may send a message to the UE over the air interface, where the message includes a preset parameter Po, which is used to limit the transmit power of the UE, so that the UE receives the pre- When the parameter is set, the second transmit power margin may be obtained according to the preset parameter and the transmit power margin in the PHR of the UE. Wherein, the second transmit power margin is equal to the first transmit power margin, or, second The transmit power margin is equal to the difference between the first transmit power margin and the preset parameter. The first transmit power margin is a transmit power margin of the user equipment when the user equipment receives the message. The first transmit power margin is the difference between the maximum transmit power of the UE and the first transmit power margin of the actual transmit power and the preset parameter Po, that is, the difference between the maximum transmit power of the UE and the preset parameter Po. The value of the Po value here may range from 0 to 23, for example, 0, 13, 16, and the like. According to different scenarios (dense area, open area), etc., through the network network optimization simulation, the optimal parameters are obtained to obtain the positive gain of the cell throughput. If the PHR reported by the UE to the eNB is less than Ρο, the PHR reported by the UE to the eNB includes the first transmit power margin, that is, the first transmit power margin of the UE is not updated, and the second transmit power margin is equal to the first Transmit power headroom.

202. The base station receives a power headroom report reported by the user equipment, where the power headroom report includes a second transmit power margin. Exemplarily, after acquiring the parameter Po sent by the eNB, the UE obtains the second transmit power margin by subtracting the difference between the first transmit power and the preset parameter Po, and obtains the updated PHR. The PHR includes the second transmit power margin of the UE, and reports the updated PHR to the eNB.

If the PHR reported by the UE to the eNB is less than Ρο, the PHR reported by the UE to the eNB includes the first transmit power margin, that is, the UE's transmit power margin is not updated.

The PHR is initiated on the PUSCH, and when the UE satisfies the PUSCH transmission condition, the PHR is sent to the base station. The conditions for initiating a PHR can be divided into three types, and any one of the conditions can be triggered to trigger an escalation. First, the prohibit timer overflows, and the path loss is larger than the path loss when the PHR was sent last time. The change is greater than the ath configuration of the athchange, the second is the emergency timer overflow, and the third is the UE ^jl ^J RRC reconfiguration message. The message contains In the phr config configuration, the UE needs to include the PHR when sending the PUSCH for the first time. The conditions here can also be other trigger conditions, which are not limited here. The PHR can occupy 6 bits, and can be reported to the base station for the I s clock UE, or can be set for other times, which is not limited herein.

203. The base station performs power control on the user equipment according to the second transmit power margin. Specifically, when the eNB obtains the second transmit power margin in the updated PHR, the eNB may acquire, according to the updated PHR, the RB that the eNB schedules for the UE according to the updated PHR (Resource Block). The number of RBs is compared with the second preset parameter of the eNB. If the number of resource blocks is smaller than the second preset parameter, the base station sends a power control command word f(i) to the user equipment. The power control command word is used to indicate that the user equipment reduces the actual transmit power. The second preset parameter is related to the number of users served by the base station and the transmission bandwidth, that is, the base station determines the second preset parameter according to the number of users served and the transmission bandwidth.

In this way, the UE can perform power control adjustment by the control of the eNB, and limit the actual transmit power of the UE in the micro-cell cell, so that the transmit power of the UE in the micro-cell cell is reduced, thereby reducing the UE to the macro station cell in the micro-cell cell. Interference of the UE within the cell to improve the throughput of the overall cell. When the number of RBs is greater than the preset target value, the eNB sends a power control command word to the UE, where the power control command word is used to raise the transmit power of the UE. Exemplarily, as shown in FIG. 3, when the eNB reduces the different Po according to the transmit power margin of the UE, the gain of the two cell traffic changes when the macro station and the micro station mix the network. The baseline X of the data is the throughput of the traffic when the macro station is connected to the network. Set to Base, the y-axis is the gain of the overall throughput when the macro-station is co-networked with respect to the throughput of the macro station when it is separately networked. Expressed as [(macro station throughput + micro station throughput) I macro station individual networking throughput] - 1. As can be seen from Figure 3, the overall throughput obtained under the condition of the macro micro station co-networking The gain ratio of Base is different from that of Po. When Po takes values of 0, 13, 16, 16, 19, the power limit of the micro station for the UE, but the overall throughput of the macro station decreases. When Po takes 23, the power limit of the micro station for the UE is further increased, and the interference of the micro station UE to the macro station UE is smaller, so that the overall throughput of the macro micro station is positive gain. The unit of Po is dB.

For example, when the Po number of the micro station is 0, the micro station and the macro station interfere with each other. Under the common networking condition, the overall throughput is reduced by 19.86% compared with the throughput of the macro station alone; when setting the Po of the micro station When it is 13 or 16, there is still interference between the macro and micro stations. Because the maximum power limit of the micro station for the UE is large, the throughput of the micro station is greatly reduced, so that the overall throughput of the macro station is relative to the Base in Po. It decreased by 32.71% at 13 o'clock and decreased by 32.81% when Po was 16, and Po was 19 when setting micro station. At the time, the maximum power-off limit of the UE to the UE is further reduced, and the throughput of the micro-station itself is greatly reduced, but the interference for the macro station is reduced relative to the Po of 13 or 16, and the overall throughput of the macro-micro station is reduced. When the Po of the micro-station is set to 23, the power limit of the micro-station for the UE increases, so that the throughput of the micro-station itself decreases, but at this time, the UE of the micro-station has little interference with the UE of the macro station. In this way, the overall throughput of the macro station has risen by 11.54%, resulting in a positive gain. The values of Po and throughput are not specifically limited here. The above data is only an example. In general, the setting of the Po value needs to obtain the optimal parameters of the Po according to different scenarios (dense area, open area, etc.) through the simulation of the network rule network optimization to obtain the positive gain of the throughput. The embodiment of the present invention provides a power control method, in which a base station sends a message to a user equipment through an air interface, where the message includes a preset parameter, and the preset parameter is used to determine a second transmit power margin of the user equipment, and then receive the power reported by the user equipment. The remaining amount report, the power headroom report includes a second transmit power margin, and the base station performs power control on the user equipment according to the second transmit power margin, which can coordinate interference between user equipments and improve cell throughput.

An embodiment of the present invention provides a method for reducing interference. As shown in FIG. 4, the method includes:

301. The user equipment receives a message sent by the base station by using an air interface, where the message includes a preset parameter.

The base station here is a Micro eNB micro station, and the user equipment is a UE in the micro station cell. The eNB may send a message to the UE by changing or adding a protocol field and transmitting the message through the air interface, the message including the preset parameter Po of the eNB. The preset parameter Po is used to limit the transmit power of the UE.

302. The user equipment acquires a second transmit power margin according to the preset parameter and a first transmit power margin of the user equipment. Exemplarily, when the UE receives the preset parameter Po delivered by the eNB, when reporting the PHR to the eNB, the difference between the first transmit power margin and the preset parameter Po, that is, the transmit power margin in the PHR is subtracted. The difference of the Po, the updated PHR is obtained, and the updated PHR includes the second transmit power margin of the UE, so that the UE triggers the report to the eNB. In the PHR, the PHR is reported to the eNB according to the transmit power margin in the updated PHR. That is, the second transmit power margin is equal to the difference between the first transmit power margin and the preset parameter. If the first transmit power margin is less than the preset parameter, the power headroom report reported by the user equipment to the base station includes a first transmit power margin, that is, the second transmit power margin is equal to the first transmit power margin.

The transmit power margin is the difference between the maximum transmit power of the UE and the actual transmit power, ie

The actual transmit power of the UE on the PDSCH can pass:

Corpse H (0 = 匪{^CMAX, l01og ₁₀ (PUSCH PUSCH

Come to get.

Wherein, ^ HW actual transmit power of the UE; is the maximum transmit power of the UE, is configured by ^{_{^{eNB; m P USC H (0}}} , expressed as a number of PUSCH RB transmission bandwidth of the i-th uplink subframe; ^P - ^{PUSCH U)} is the initial value of the eNB when the UE first accesses; "(is the path loss compensation factor, the cell level parameter, a total of 8 values, expressed in 3 bits, which can be (0, 0.4, 0.5, 0.6, 0.7) , 0.8 , 0.9 , 1 ) , the default value of the current configuration is 0.7; PL is the downlink path loss estimated on the UE side; ^Δ ( ^ζ ') is the adaptive coding mode, which is the closed-loop power control instruction, and i is the subframe number.

303. The user equipment reports a power headroom report to the base station, where the power headroom report includes a second transmit power margin.

For example, after the UE acquires the second transmit power margin in the updated PHR according to the Po parameter delivered by the eNB, the PHR is included in the eNB, and the updated second transmit power margin is included in the PHR.

304. The user equipment receives a power control command word from a base station, where the power command word is used to control a transmit power of the user equipment.

305. The user equipment adjusts an actual transmit power according to the power control command word.

Specifically, when the eNB receives the updated PHR, the UE slightly pseudo-amplifies the actual transmit power of the UE, because the UE updates the transmit power margin of the UE. Therefore, the eNB needs to perform power control on the UE. Specifically, the eNB may acquire the number of RBs that the eNB schedules for the UE according to the updated PHR, and then the eNB selects the number of RBs of the UE and the second of the eNB by the eNB of the UE. The preset parameters are compared, and the power control command word f(i) sent by the eNB to the UE is updated according to the comparison result, so that the UE updates the UE's transmit power according to the power control command word. The second preset parameter is related to the number of users and the transmission bandwidth under the base station.

If the number of RBs is less than the preset target value, the eNB sends a power control command word to the UE, where the power control command word is used to indicate that the UE reduces the actual transmit power of the UE, so that the UE can perform power control adjustment by using the control of the eNB, and limit the micro The transmit power of the UE in the station cell reduces the transmit power of the UE in the micro-cell cell to reduce the interference of the UE in the micro-cell cell to the UE in the macro-cell cell, so as to improve the throughput of the whole cell.

When the number of RBs is greater than the second preset parameter, the eNB sends a power control command word to the UE, where the power control command word is used to raise the transmit power of the UE.

The PHR of the UE is initiated on the PUSCH, and when the UE meets the PUSCH transmission condition, the PHR is sent to the base station. The conditions for initiating PHR can be divided into three types, and any one of the conditions can be triggered to trigger the reporting. First, the prohibit timer overflows, and the path loss is larger than the path loss when the PHR was sent last time. The change is greater than the ath configuration of the athchange, the second is the emergency timer overflow, and the third is the UE ^jl ^J RRC reconfiguration message. The message contains In the phr config configuration, the UE needs to include the PHR when sending the PUSCH for the first time. The conditions here can also be other trigger conditions, which are not limited herein. The PHR can occupy 6 bits, and can be reported to the base station for the I s clock UE, or can be set for other times, which is not limited herein. In this way, when the eNB sets the command mode through the air interface and controls the actual transmit power of the UE according to different Po values, the transmit power of the UE in the micro-cell cell is reduced, and thus the uplink interference of the micro-station to the macro station user is reduced. It coordinates the interference between users and improves the throughput of the whole cell. The relationship between the Po value and the cell throughput is similar to the step 203 in the embodiment shown in FIG. 2, and details are not described herein again. The embodiment of the present invention provides a power control method, where a user equipment receives a message sent by a base station over an air interface, where the message includes a preset parameter, and the user equipment acquires a second transmit power according to the preset parameter and the first transmit power margin of the user equipment. Balance, to base station Reporting the power headroom report, the power headroom report includes a second transmit power margin, and then receiving a power control command word from the base station, where the power command word is used to control the transmit power of the user equipment, and the actual transmit power is adjusted according to the power control command word, Coordinate interference between user equipments and improve cell throughput. The embodiment of the present invention provides a base station 01, as shown in FIG. 5, including: a receiving unit 011, configured to receive a power headroom report reported by a user equipment, where the power headroom report includes a first transmit power margin of the user equipment.

The processing unit 012 is configured to obtain a second transmit power margin according to the preset transmit power and the first transmit power margin in the power headroom report. And,

The control unit 013 is configured to perform power control on the user equipment according to the second transmit power margin.

Optionally, as shown in FIG. 6, the control unit 013 may include a first sub-unit 013 1 and a second sub-unit 0132. The first sub-unit 013 1 is configured to: when the power spectral density of the user equipment is constant, the base station is configured according to a second transmit power margin, obtaining a number of resource blocks scheduled for the user equipment, and determining whether the number of resource blocks is smaller than a second preset parameter;

The second sub-unit 0132 is configured to: when the first sub-unit 0131 determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word is used to indicate that the user equipment reduces the actual transmit power. . Optionally, the processing unit 012 is further configured to: determine a second preset parameter according to the number of users of the service and the transmission bandwidth, and provide the control unit 013.

The second transmit power margin is a difference between the first transmit power margin and the preset parameter. The first transmit power margin is the difference between the maximum transmit power of the user equipment and the actual transmit power.

Optionally, the preset parameters range from 0 to 23 decibels. An embodiment of the present invention provides a base station, which receives a function reported by a user equipment by using a base station. Rate margin report, the power headroom report includes a first transmit power margin of the user equipment, and further acquires a second transmit power margin according to the preset transmit power and the first transmit power margin in the power headroom report, and the base station according to the first The second transmit power margin controls the power of the user equipment, can coordinate interference between user equipments, and improve cell throughput.

The embodiment of the present invention provides a base station 02, as shown in FIG. 7, including: a sending unit 021, configured to send a message to a user equipment by using an air interface, where the message includes a preset parameter, and the preset parameter is used to determine a second of the user equipment. Transmit power headroom.

The receiving unit 022 is configured to receive a power headroom report reported by the user equipment, where the power headroom report includes a second transmit power margin;

The control unit 023 is configured to perform power control on the user equipment according to the second transmit power margin.

Optionally, as shown in FIG. 8, the control unit 023 may include a third sub-unit 023 1 and a fourth sub-unit 0232; the third sub-unit 023 1 is configured to: when the power spectral density of the user equipment is constant, according to the The second transmit power margin is used to obtain the number of resource blocks scheduled for the user equipment, and determine whether the number of resource blocks is smaller than the second preset parameter;

The fourth sub-unit 0232 can be configured to: when the third sub-unit 0131 determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word is used to indicate that the user equipment reduces the actual transmission. power.

Optionally, the processing unit 024 is configured to: determine a second preset parameter according to the number of users of the service and the transmission bandwidth, and provide the control unit 023.

Optionally, the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to a difference between the first transmit power margin and the preset parameter;

The first transmit power margin is the difference between the maximum transmit power of the user equipment and the actual transmit power.

Optionally, the preset parameters range from 0 to 23 decibels. An embodiment of the present invention provides a base station, where a base station sends a message to a user equipment by using an air interface, where the message includes a preset parameter, and the preset parameter is used to determine a second transmit power margin of the user equipment, and further receive the power headroom reported by the user equipment. The power headroom report includes a second transmit power margin, and the base station performs power control on the user equipment according to the second transmit power margin, which can coordinate interference between user equipments and improve cell throughput.

An embodiment of the present invention provides a user equipment 03, as shown in FIG. 9, including: a receiving unit 031, configured to receive a message sent by a base station over an air interface, where the message includes a preset parameter. The obtaining unit 032 is configured to obtain a second transmit power margin according to the preset parameter and the first transmit power margin of the user equipment; and

The reporting unit 033 is configured to report a power headroom report to the base station, where the power headroom report includes a second transmit power margin. The receiving unit 031 is further configured to receive a power control command word from the base station, where the power command word is used to control the transmit power of the user equipment. Optionally, it may also include:

The processing unit 034 is configured to adjust an actual transmit power according to the power control command word. Optionally, the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to a difference between the first transmit power margin and the preset parameter;

The first transmit power margin is a transmit power margin of the user equipment when the receiving unit 03 1 receives the message.

Optionally, the preset parameters range from 0 to 23 decibels. An embodiment of the present invention provides a user equipment, where a user equipment receives a message sent by a base station over an air interface, where the message includes a preset parameter, and the user equipment acquires a second transmit power margin according to the preset parameter and the first transmit power margin of the user equipment. And reporting a power headroom report to the base station, where the power headroom report includes a second transmit power margin, and then receiving a power control command word from the base station, where the power command word is used to control the transmit power of the user equipment, according to the work The control command word adjusts the actual transmit power, can coordinate interference between user equipments, and improve cell throughput.

The embodiment of the present invention provides a base station 04. As shown in FIG. 10, the base station 04 includes: a bus 041, a processor 0412, a transmitter 043, a receiver 044, and a memory 045, where the memory 045 is used to store an instruction. The receiver 044 executes the instruction for receiving a power headroom report reported by the user equipment, where the power headroom report includes a first transmit power margin of the user equipment; and, the processor 042 executes the command, according to the power headroom report. The first transmit power margin and the preset parameter acquire a second transmit power margin, and perform power control on the user equipment according to the second transmit power margin.

In the embodiment of the present invention, optionally, the processor 042 executes the instruction for performing power control on the user equipment according to the second transmit power margin, including:

When the power spectral density of the user equipment is constant, the number of resource blocks scheduled for the user equipment is obtained according to the second transmit power margin; determining whether the number of resource blocks is smaller than the second preset parameter, and if yes, indicating the transmitter to the user equipment The power control command word is sent, and the power control command word is used to indicate that the user equipment reduces the actual transmit power.

In the embodiment of the present invention, optionally, the processor 042 executes the instruction, and is further configured to: determine a second preset parameter according to the number of users of the service and the transmission bandwidth. In the embodiment of the present invention, optionally, the second transmit power margin is a difference between the first transmit power margin and the preset parameter. In the embodiment of the present invention, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

In the embodiment of the present invention, optionally, the preset parameter ranges from 0 to 23 decibels. Therefore, the base station provided by the embodiment of the present invention receives the power headroom report reported by the user equipment by using the base station, where the power headroom report includes the first transmit power margin of the user equipment, and further, according to the first transmit power balance in the power headroom report. The quantity and the preset parameter are used to obtain a second transmit power margin, and the base station performs power control on the user equipment according to the second transmit power margin, which can coordinate interference between user equipments and improve cell throughput. An embodiment of the present invention provides a base station 05, as shown in FIG. Included: a bus 05 1 , a processor 052 , a transmitter 053 , a receiver 054 , and a memory 055 , wherein the memory 055 is configured to store an instruction, and the transmitter 053 executes the instruction to send a message to the user equipment over the air interface, the message The preset parameter is used to determine a second transmit power margin of the user equipment; the receiver 054 executes the command to receive a power headroom report reported by the user equipment, where the power headroom report includes a second transmit power margin And executing, by the processor 052, the power control of the user equipment according to the second transmit power margin.

In the embodiment of the present invention, the processor 052 is configured to perform power control on the user equipment according to the second transmit power margin, including:

When the power spectral density of the user equipment is constant, the number of resource blocks scheduled for the user equipment is obtained according to the second transmit power margin; determining whether the number of resource blocks is smaller than the second preset parameter, and if yes, indicating the transmitter 053 to the user The device sends a power control command word, and the power control command word is used to indicate that the user equipment reduces the actual transmit power. In the embodiment of the present invention, the processor 052 is further configured to: determine a second preset parameter according to the number of users of the service and the transmission bandwidth.

In the embodiment of the present invention, optionally, the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to the difference between the first transmit power margin and the preset parameter; A transmit power margin is a transmit power margin of the user equipment when the user equipment receives the message. In the embodiment of the present invention, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

In the embodiment of the present invention, optionally, the preset parameter ranges from 0 to 23 decibels. Therefore, in the base station provided by the embodiment of the present invention, the base station sends a message to the user equipment by using the air interface, where the message includes a preset parameter, and the preset parameter is used to determine the second transmit power margin of the user equipment, and then receive the power remaining by the user equipment. The quantity report, the power headroom report includes a second transmit power margin, and the base station performs power control on the user equipment according to the second transmit power margin, which can coordinate interference between user equipments and improve cell throughput. An embodiment of the present invention provides a user equipment 06. As shown in FIG. 12, the user equipment 06 includes: a bus 061, a processor 062, a transmitter 063, a receiver 064, and a memory 065, where the memory 065 is used to store instructions. The receiver 064 executes the instruction for receiving a message sent by the base station over the air interface, where the message includes a preset parameter; the processor 062 executes the instruction to obtain the second transmission according to the preset parameter and the first transmit power margin of the user equipment. a power headroom; and, the transmitter 063 executes the command to report a power headroom report to the base station, the power headroom report includes a second transmit power margin, and the receiver 064 executes the command to perform receiving the power control command word from the base station. The power command word is used to control the transmit power of the user equipment.

In the embodiment of the present invention, optionally, the processor 062 executes the instruction, and is further configured to: adjust an actual transmit power according to the power control command word. In the embodiment of the present invention, optionally, the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to the difference between the first transmit power margin and the preset parameter; A transmit power margin is a transmit power margin of the user equipment when the user equipment receives the message.

In the embodiment of the present invention, the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

In the embodiment of the present invention, optionally, the preset parameter ranges from 0 to 23 decibels. Therefore, the user equipment of the embodiment of the present invention receives the message sent by the base station through the air interface, and the message includes a preset parameter, and the user equipment acquires the second transmit power according to the preset parameter and the first transmit power margin of the user equipment. The power headroom report is reported to the base station, and the power headroom report includes a second transmit power margin, and then receives a power control command word from the base station, where the power command word is used to control the transmit power of the user equipment, and the power control command word is adjusted according to the power control command word. The actual transmit power can coordinate the interference between user equipments and improve the cell throughput.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. In combination or can be integrated into another system, or some features can be ignored, or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form. In addition, in the device in various embodiments of the present invention, each functional unit may be integrated into one processing unit, or each unit may be physically included, or two or more units may be integrated into one unit. The above units may be implemented in the form of hardware or in the form of hardware plus software functional units.

All or part of the steps of implementing the foregoing method embodiments may be performed by hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and when executed, the program includes the steps of the foregoing method embodiments; The foregoing storage medium includes: a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. medium.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A power control method, comprising:

Receiving, by the base station, a power headroom report reported by the user equipment, where the power headroom report includes a first transmit power margin of the user equipment;

The base station acquires a second transmit power margin according to a preset parameter and a first transmit power margin in the power headroom report;

The method according to claim 1, wherein the base station performs power control on the user equipment according to the second transmit power margin:

The base station acquires, according to the second transmit power margin, the number of resource blocks scheduled for the user equipment, when the power spectrum density of the user equipment is unchanged;

If the number of resource blocks is smaller than the second preset parameter, the base station sends a power control command word to the user equipment, where the power control command word is used to instruct the user equipment to reduce the actual transmit power.

The method according to claim 2, wherein the method further comprises: the base station determining the second preset parameter according to the number of users served and the transmission bandwidth.

The method according to any one of claims 1 to 3, wherein the second transmit power margin is a difference between the first transmit power margin and the preset parameter.

The method according to any one of claims 1 to 4, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The method according to any one of claims 1 to 5, characterized in that the preset parameter ranges from 0 to 23 decibels.

_7. A power control method, comprising:

The base station sends a message to the user equipment by using the air interface, where the message includes a preset parameter, where the preset parameter is used to determine a second transmit power margin of the user equipment; and the base station receives the power reported by the user equipment. The quantity report, the power headroom report includes the second transmit power margin;

The base station performs power control on the user equipment according to the second transmit power margin. The method according to claim 7, wherein the base station performing power control on the user equipment according to the second transmit power margin includes:

The method according to claim 8, wherein the method further comprises: the base station determining the second preset parameter according to the number of users served and the transmission bandwidth.

The method according to any one of claims 7 to 9, wherein the second transmit power margin is equal to a first transmit power margin, or the second transmit power margin is equal to the first a difference between a transmit power margin and the preset parameter; wherein the first transmit power margin is a transmit power margin of the user equipment when the user equipment receives the message.

1 1. The method of claim 10, wherein

The first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The method according to any one of claims 7 to 11, wherein the preset parameter ranges from 0 to 23 decibels.

13. A power control method, comprising:

The user equipment receives a message sent by the base station over the air interface, where the message includes a preset parameter;

The user equipment reports a power headroom report to the base station, where the power headroom report includes the second transmit power margin;

The user equipment receives a power control command word from the base station, and the power command word is used to control a transmit power of the user equipment.

14. The method according to claim 13, wherein the method further comprises:

The user equipment adjusts the actual transmit power according to the power control command word.

15. Method according to claim 13 or 14, characterized in that The second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to a difference between the first transmit power margin and the preset parameter;

The method according to claim 15, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The method according to any one of claims 13 to 16, wherein the preset parameter ranges from 0 to 23 decibels.

18. A base station, comprising:

And a control unit, configured to perform power control on the user equipment according to the second transmit power margin.

The base station according to claim 18, wherein the control unit comprises a first subunit and a second subunit;

The first subunit is configured to: when the power spectrum density of the user equipment is unchanged, obtain a quantity of resource blocks scheduled for the user equipment according to the second transmit power margin, and determine the resource block Whether the quantity is less than the second preset parameter;

The second subunit is configured to: when the first subunit determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word And used to instruct the user equipment to reduce the actual transmit power.

The base station according to claim 19, wherein the processing unit is further configured to: determine the second preset parameter according to the number of users of the service and the transmission bandwidth, and provide the second preset parameter to the control unit.

The base station according to any one of claims 18 to 20, wherein the second transmit power margin is a difference between the first transmit power margin and the preset parameter.

The base station according to any one of claims 18 to 21, wherein the first transmit power margin is a maximum transmit power and an actual transmit of the user equipment. The difference in power.

The base station according to any one of claims 18 to 22, wherein the preset parameter ranges from 0 to 23 decibels.

24. A base station, comprising:

The base station according to claim 24, wherein the control unit comprises a third subunit and a fourth subunit;

The third subunit is configured to: when the power spectral density of the user equipment is unchanged, obtain a quantity of resource blocks scheduled for the user equipment according to the second transmit power margin, and determine the resource block Whether the quantity is less than the second preset parameter;

The fourth subunit is configured to: when the third subunit determines that the number of resource blocks is smaller than the second preset parameter, send a power control command word to the user equipment, where the power control command word And used to instruct the user equipment to reduce the actual transmit power.

The base station according to claim 25, wherein the processing unit is configured to: determine the second preset parameter according to the number of users of the service and the transmission bandwidth, and provide the second preset parameter to the control unit.

The base station according to any one of claims 24 to 26, wherein the second transmit power margin is equal to a first transmit power margin, or the second transmit power margin is equal to the first a difference between a transmit power margin and the preset parameter;

The base station according to claim 27, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The base station according to any one of claims 24 to 28, wherein the preset parameter ranges from 0 to 23 decibels.

30. A user equipment, comprising: a receiving unit, configured to receive a message sent by the base station by using an air interface, where the message includes a preset parameter;

An acquiring unit, configured to acquire a second transmit power margin according to the preset parameter and a first transmit power margin of the user equipment; and

a reporting unit, configured to report a power headroom report to the base station, where the power headroom report includes the second transmit power margin;

The user equipment according to claim 30, further comprising: a processing unit, configured to adjust the actual transmit power according to the power control command word.

The user equipment according to claim 30 or 31, wherein the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to the a difference between the first transmit power margin and the preset parameter; wherein the first transmit power margin is a transmit power margin of the user equipment when the receiving unit receives the message.

33. The user equipment according to claim 32, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The user equipment according to any one of claims 30 to 33, wherein the preset parameter ranges from 0 to 23 decibels.

35. A base station, comprising:

a processor, configured to acquire a second transmit power margin according to the preset parameter and the first transmit power margin in the power headroom report, and perform power on the user equipment according to the second transmit power margin control.

The base station according to claim 35, wherein the processor is configured to:

Obtaining, according to the second transmit power margin, a quantity of resource blocks scheduled for the user equipment, when the power spectral density of the user equipment is unchanged;

Determining whether the number of the resource blocks is smaller than a second preset parameter, if yes, instructing the transmitter to send a power control command word to the user equipment, where the power control command word is used to indicate The user equipment reduces the actual transmit power.

The base station according to claim 36, wherein the processor is further configured to: determine the second preset parameter according to the number of users served and the transmission bandwidth.

The base station according to any one of claims 35 to 37, wherein the second transmit power margin is a difference between the first transmit power margin and the preset parameter.

The base station according to any one of claims 35 to 38, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The base station according to any one of claims 35 to 39, wherein the preset parameter ranges from 0 to 23 decibels.

4 1. A base station, comprising:

And a processor, configured to perform power control on the user equipment according to the second transmit power margin.

The base station according to claim 41, wherein the processor is configured to:

The base station according to claim 42, wherein the processor is further configured to: determine the second preset parameter according to the number of users served and the transmission bandwidth.

The base station according to any one of claims 41 to 43, wherein the second transmit power margin is equal to a first transmit power margin, or the second transmit power margin is equal to the first transmit power The difference between the remaining amount and the preset parameter;

The first transmit power margin is when the user equipment receives the message, The transmit power margin of the user equipment.

The base station according to claim 44, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The base station according to any one of claims 4 to 45, wherein the preset parameter ranges from 0 to 23 decibels.

47. A user equipment, comprising:

a processor, configured to acquire a second transmit power margin according to the preset parameter and a first transmit power margin of the user equipment; and

The user equipment according to claim 47, wherein the processor is further configured to: adjust the actual transmit power according to the power control command word.

The user equipment according to claim 32, wherein the second transmit power margin is equal to the first transmit power margin, or the second transmit power margin is equal to the first transmit a difference between the power headroom and the preset parameter;

The user equipment according to claim 49, wherein the first transmit power margin is a difference between a maximum transmit power of the user equipment and an actual transmit power.

The user equipment according to any one of claims 47 to 50, wherein the preset parameter ranges from 0 to 23 decibels.