CN110191504B - Power control method - Google Patents
Power control method Download PDFInfo
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- CN110191504B CN110191504B CN201910304458.9A CN201910304458A CN110191504B CN 110191504 B CN110191504 B CN 110191504B CN 201910304458 A CN201910304458 A CN 201910304458A CN 110191504 B CN110191504 B CN 110191504B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/32—TPC of broadcast or control channels
Abstract
The invention discloses a power control method, which acts on second equipment and comprises the following specific steps: receiving transmission service indication information configured by first equipment, wherein the indication information is used for indicating the service type of communication between second equipment and third equipment and indicating whether the transmission service is a broadcast service or a multicast service; the indication information displays the indication through radio resource control or downlink control information, or implicitly indicates through a radio network temporary identifier in the DCI; receiving a power control parameter configured by a first device; and calculating the transmission power of communication between the second device and the third device based on the power control parameter. The method is suitable for communication scenes between future equipment, can realize accurate power control, avoids interference between the equipment, and improves the transmission rate and the coverage performance.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a power control method.
Background
In the existing New air interface (NR, New Radio) mobile communication system, for enhanced mobile broadband services, ultra-low delay and ultra-high reliability services, and large-scale machine communication services, uplink power control is obtained based on downlink measurement and calculation. However, in future mobile communication systems, in addition to supporting the above-described services, device-to-device communication is supported.
In the NR system, taking a Physical Uplink Shared Channel (PUSCH) as an example, a power control parameter of the PUSCH is determined together with the UE through a network side instruction.
For an uplink fractional bandwidth b on a carrier f of a serving cell c, the PUSCH power control formula is as follows:
wherein the content of the first and second substances,
-i represents a transmission time;
j represents a target receiving power and a path loss compensation factor value identification, and is obtained through network side indication;
-qdthe path loss calculation is obtained through network side indication according to the reference signal identifier;
-l represents a closed loop power control process identity, obtained by network side indication;
-PCMAX,f,c(i) the maximum transmission power is calculated by User Equipment (UE);
-PO_PUSCH,b,f,c(j) and alphab,f,c(j) Respectively obtaining target receiving power and a path loss compensation factor through network side indication;
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obtaining the transmission bandwidth of the PUSCH through network side indication;
-PLb,f,c(qd) The path loss estimation value is obtained by UE measurement;
-ΔTF,b,f,c(i) obtaining power compensation quantity related to a modulation coding mode through network side indication;
-fb,f,cand (i, l) is closed-loop power control adjustment quantity, and is obtained by network side indication calculation.
In the prior art, path loss in PUSCH power control is calculated based on UE downlink measurement, and if the current power control mechanism is still used in device-to-device communication, the UE measures path loss based on a downlink signal sent by a base station and calculates uplink transmission power, which may cause UE transmission power increase, network interference increase, and UE transmission rate decrease.
Disclosure of Invention
The invention aims to provide a power control method, which is suitable for a communication scene between future equipment and equipment, can realize accurate power control, avoid interference between the equipment and improve the transmission rate and the coverage performance so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a power control method acts on a second device, and comprises the following specific steps:
s1: receiving transmission service indication information configured by first equipment, wherein the indication information is used for indicating the service type of communication between second equipment and third equipment and indicating whether the transmission service is a broadcast service or a multicast service;
s2: the indication information displays the indication through radio resource control or downlink control information, or implicitly indicates through a radio network temporary identifier in the DCI;
s3: receiving a power control parameter configured by a first device;
s4: calculating the transmission power of communication between the second device and the third device based on the power control parameter;
further, the power control parameters include at least: at least one of a target maximum transmit power, a target path loss, a target receive power, and a target distance.
Further, the target maximum transmission power is a maximum transmission power for communication between the second device and the third device.
Further, the target transmission power is a transmission power for communication between the second device and the third device.
Further, the target path loss is a path loss value of communication between the second device and the third device, and is obtained by reporting to the first device through the third device.
Further, the target distance is a communication distance between the second device and the third device, or a target coverage distance of the second device.
Further, the first device is a base station, a cell, a relay node, and a roadside unit.
Further, the second device and the third device are a roadside unit, a UE, a machine device, and a vehicle.
Further, when the indication information adopts broadcast, multicast and multicast service transmission, the second device calculates the transmitting power based on at least one of the target maximum transmitting power, the target transmitting power and the target distance; otherwise, the second device calculates the transmit power based on at least one of the target maximum transmit power, the target path loss, and the target receive power.
Compared with the prior art, the invention has the beneficial effects that:
the power control method provided by the invention is suitable for a second device, receives transmission service indication information configured by a first device, receives power control parameters configured by the first device, calculates the transmission power of communication between the second device and a third device based on the power control parameters, and when the indication information indicates that the transmission service is a broadcast, multicast or multicast service, the second device calculates the transmission power based on at least one of the target maximum transmission power, the target transmission power and the target distance; otherwise, the second device calculates the transmit power based on at least one of the target maximum transmit power, the target path loss, and the target receive power. The method is suitable for communication scenes between future equipment, can realize accurate power control, avoids interference between the equipment, and improves the transmission rate and the coverage performance.
Detailed Description
The following examples will explain the present invention in detail, however, the present invention is not limited thereto. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A power control method acts on a second device, and comprises the following specific steps:
step 1: receiving transmission service indication information configured by first equipment, wherein the first equipment is a base station, a cell, a relay node and a roadside unit, the indication information is used for indicating the service type of communication between second equipment and third equipment and indicating whether the transmission service is a broadcast service, a multicast service or a multicast service, and the second equipment and the third equipment are the roadside unit, UE, machine equipment, a vehicle and the like; when the indication information adopts broadcast, multicast and multicast service transmission, the second equipment calculates the transmitting power based on at least one of the maximum transmitting power of the target, the transmitting power of the target and the target distance; otherwise, the second equipment calculates the transmitting power based on at least one of the target maximum transmitting power, the target path loss and the target receiving power;
step 2: the indication information displays the indication through radio resource control or downlink control information, or implicitly indicates through a radio network temporary identifier in the DCI;
and step 3: receiving a power control parameter configured by a first device;
and 4, step 4: calculating the transmission power of communication between the second device and the third device based on the power control parameter;
a transmit power for communication between the second device and the third device is calculated based on the target transmit power. The target transmit power is a transmit power for communication between the second device and the third device.
The first equipment indicates the power P ' of multicast transmission of the second equipment at the ith moment for the second equipment through the RNTI implicit indication in the DCI, the second equipment adopts broadcast communication, and the first equipment indicates the power P ' of multicast transmission of the second equipment at the ith moment 'PSSCH(i)。
And after the second equipment receives the target transmitting power indicated by the first equipment, taking the minimum value between the target transmitting power and the maximum transmitting power of the second equipment as the actual transmitting power of the second equipment for transmitting.
PPSSCH(i)＝min{PCMAX(i)，P′PSSCH(i)}
Example 2
And calculating the transmission power of communication between the second device and the third device based on the target path loss.
The first device does not instruct the second device to transmit in a broadcast, multicast or multicast manner. The first device indicates for the second device a target path loss value PL for the second device.
And the target path loss value PL is a path loss value of communication between the second equipment and the third equipment, is measured by the third equipment, and is reported to the first equipment to obtain the target path loss value PL.
And after receiving the target path loss value indicated by the first equipment, the second equipment calculates the transmitting power according to the path loss value, and sends the minimum value between the calculated transmitting power and the maximum transmitting power of the second equipment as the actual transmitting power of the second equipment.
Example 3
A transmit power for communication between the second device and the third device is calculated based on the target receive power.
The first device does not instruct the second device to transmit in a broadcast, multicast or multicast manner. The first device indicates to the second device a target received power for the second device to transmit.
And the target receiving power is measured by the third equipment and reported to the first equipment to obtain the target receiving power.
After receiving the target receiving power indicated by the first equipment, the second equipment calculates a target path loss value PL based on the target receiving power, calculates transmitting power according to the path loss value, and sends the minimum value between the calculated transmitting power and the maximum transmitting power of the second equipment as the actual transmitting power of the second equipment.
Example 4
A transmit power for communication between the second device and the third device is calculated based on the target distance. The target distance is a communication distance between the second device and the third device, or a target coverage distance of the second device.
The first equipment implicitly indicates through the RNTI in the DCI, and the second equipment communicates in a multicast mode. And the first equipment indicates the target transmission distance broadcast and sent by the second equipment at the ith moment to the second equipment to be S.
After receiving the target transmission distance indicated by the first device, the second device calculates the path loss PL(s) based on the target transmission distance, further calculates the transmission power, and takes the minimum value between the transmission power and the maximum transmission power of the second device as the actual transmission power of the second device for transmission.
Example 5
And calculating the transmission power of communication between the second device and the third device based on the target maximum transmission power and the target distance. The target maximum transmit power is a maximum transmit power for communication between the second device and the third device.
The first equipment implicitly indicates through the RNTI in the DCI, and the second equipment communicates in a multicast mode. The first device indicates that the target maximum transmission power of broadcast transmission of the second device at the ith moment is P 'for the second device'CMAX(i) The target transmission distance is S.
After receiving the target transmission distance indicated by the first device, the second device calculates the path loss PL(s) based on the target transmission distance, further calculates the transmission power, and takes the minimum value among the transmission power, the target maximum transmission power and the second device maximum transmission power as the actual transmission power of the second device to transmit.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A power control method is characterized in that the method acts on a second device and comprises the following specific steps:
s1: receiving transmission service indication information configured by first equipment, wherein the indication information is used for indicating the service type of communication between second equipment and third equipment and indicating whether the transmission service is a broadcast service or a multicast service;
s2: the indication information displays the indication through radio resource control or downlink control information, or implicitly indicates through a radio network temporary identifier in the DCI;
s3: receiving a power control parameter configured by a first device;
s4: calculating the transmission power of communication between the second device and the third device based on the power control parameter;
the power control parameters include at least: at least one of a target maximum transmit power, a target path loss, a target receive power, and a target distance, wherein:
the target maximum transmitting power is the maximum transmitting power of communication between the second equipment and the third equipment;
the target transmitting power is the transmitting power of communication between the second equipment and the third equipment;
the target path loss is a path loss value of communication between the second equipment and the third equipment, and is obtained by reporting to the first equipment through the third equipment;
the target distance is a communication distance between the second device and the third device, or a target coverage distance of the second device;
when the indication information adopts broadcast, multicast and multicast service transmission, the second equipment calculates the transmitting power based on at least one of the maximum transmitting power of the target, the transmitting power of the target and the distance of the target; otherwise, the second device calculates the transmit power based on at least one of the target path loss, the target receive power.
2. The method of claim 1, wherein the first device is a base station, a cell, a relay node, or a roadside unit.
3. The method of claim 1, wherein the second device and the third device are wayside units, UEs, machine devices, and vehicles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910304458.9A CN110191504B (en) | 2019-04-16 | 2019-04-16 | Power control method |
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| CN201910304458.9A CN110191504B (en) | 2019-04-16 | 2019-04-16 | Power control method |
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| CN110191504A CN110191504A (en) | 2019-08-30 |
| CN110191504B true CN110191504B (en) | 2022-06-14 |
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| CN114641057B (en) * | 2020-12-15 | 2023-08-08 | 中信科智联科技有限公司 | Power control method and device, road side equipment and network side equipment |
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| CN104469961A (en) * | 2013-09-25 | 2015-03-25 | 中兴通讯股份有限公司 | Device-to-device communication method, device and system |
| CN105103637A (en) * | 2014-01-26 | 2015-11-25 | 华为技术有限公司 | Device communication method and apparatus |
| CN105722200A (en) * | 2014-12-02 | 2016-06-29 | 索尼公司 | Electronic equipment and wireless communication method in wireless communication system |
| CN106465285A (en) * | 2014-05-09 | 2017-02-22 | 创新技术实验室株式会社 | Method and apparatus for controlling transmission power in wireless communication system |
| CN109479245A (en) * | 2016-08-12 | 2019-03-15 | 华为技术有限公司 | Poewr control method, device, terminal and the network equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6396507B2 (en) * | 2014-08-01 | 2018-09-26 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Terminal, base station, transmission power control method, and transmission power setting method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104469961A (en) * | 2013-09-25 | 2015-03-25 | 中兴通讯股份有限公司 | Device-to-device communication method, device and system |
| CN105103637A (en) * | 2014-01-26 | 2015-11-25 | 华为技术有限公司 | Device communication method and apparatus |
| CN106465285A (en) * | 2014-05-09 | 2017-02-22 | 创新技术实验室株式会社 | Method and apparatus for controlling transmission power in wireless communication system |
| CN105722200A (en) * | 2014-12-02 | 2016-06-29 | 索尼公司 | Electronic equipment and wireless communication method in wireless communication system |
| CN109479245A (en) * | 2016-08-12 | 2019-03-15 | 华为技术有限公司 | Poewr control method, device, terminal and the network equipment |
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