WO2020156070A1

WO2020156070A1 - Power control method, apparatus, terminal and readable storage medium

Info

Publication number: WO2020156070A1
Application number: PCT/CN2020/070904
Authority: WO
Inventors: 姜炜; 纪子超; 彭淑燕; 刘是枭
Original assignee: 维沃移动通信有限公司
Priority date: 2019-01-30
Filing date: 2020-01-08
Publication date: 2020-08-06
Also published as: CN111246558A; CN111246558B

Abstract

Disclosed in the embodiments of the present disclosure are a power control method, an apparatus, a terminal and a readable storage medium. The power control method comprises: in sidelink communication, a second terminal receiving power control request information from a first terminal, the first terminal being an information receiving terminal in the sidelink communication; and the second terminal determining the transmission power of the second terminal on the basis of first information, the first information being obtained from the outside by the second terminal or obtained by means of measurement by the second terminal.

Description

Power control method, device, terminal and readable storage medium

Cross references to related applications

This application claims the priority of Chinese Patent Application No. 201910093956.3 filed in China on January 30, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of communications, and in particular to a power control method, device, terminal and readable storage medium.

Background technique

Generally, sidelink (Sidelink) refers to the technology used to realize the direct communication between multiple terminals (User Equipment, UE) without going through the network; the Internet of Vehicles (Vehicle to Everything, V2X) technology is the technology in the intelligent transportation system. A key wireless communication and information processing technology.

In the related art, the open-loop power control method of Sidelink roughly uses the path loss between the terminal and the base station to achieve centralized control of the transmission power of the terminal in the Sidelink network. In Sidelink communication, for the originating UE with multiple receiving end UEs. In other words, there is only one power control process for the originating UE. This working method is unreasonable because of the fact that in the original Long Term Evolution (LTE) V2X only broadcast services are used, and the path loss between the UE and the base station is used for open-loop power control within the coverage of the base station. , Outside the coverage of the base station, use the maximum transmit power to send. However, in New Radio (NR) V2X, there are unicast, multicast, and broadcast services. Within the coverage of the base station, for unicast services, power control based on the path loss between the terminal and the base station is no longer reasonable. However, in scenarios outside the coverage of base stations, for unicast services and even multicast services, the power control mechanism in related technologies can no longer meet the higher requirements for overall system performance.

Summary of the invention

The embodiments of the present disclosure provide a power control method, a device, a terminal, and a readable storage medium, so as to solve the current problem of poor power control effect on the terminal in side link communication.

In order to solve the above technical problems, the present disclosure is implemented as follows:

In the first aspect, the embodiments of the present disclosure provide a power control method, which is applied to a terminal, and the method includes: in side link communication, a second terminal receives power control request information from a first terminal, and the first terminal Is the information receiving terminal in the side link communication; the second terminal determines the transmit power of the second terminal based on the first information; wherein the first information is obtained from the outside by the second terminal or Obtained by measurement by the second terminal.

In the second aspect, the embodiments of the present disclosure also provide a power control method, which is applied to a terminal, and the method includes: in the side link communication, the first terminal determines the type of the power control target terminal based on the second information; The first terminal is an information receiving terminal in the side link communication, and the second information is obtained from the outside by the first terminal or obtained by measurement by the first terminal.

In a third aspect, the embodiments of the present disclosure also provide a power control device, which is applied to a terminal, and includes: an information receiving module, configured to receive power control request information from a first terminal in side link communication. A terminal is the information receiving terminal in the side link communication; a transmit power determination module is configured to determine the transmit power of the second terminal based on the first information; wherein the first information is obtained from the second terminal Obtained externally or measured by the second terminal.

In a fourth aspect, the embodiments of the present disclosure also provide a power control device, which is applied to a terminal, and includes: a type determination module, configured to determine the type of the power control target terminal based on the second information in side link communication; wherein, The type determining module is located in the information receiving terminal in the side link communication, and the second information is obtained from the outside by the first terminal or obtained by measurement by the first terminal.

In a fifth aspect, the embodiments of the present disclosure also provide a terminal. The terminal includes a processor, a memory, and a computer program that is stored on the memory and can run on the processor. The processor implements the steps of the power control method as described above when executed.

In a sixth aspect, embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the power control method described above are implemented .

Using the embodiments of the present disclosure, the type of the power control target terminal in the side link communication can be determined, and the power control target terminal can adjust its own transmission power to achieve the purpose of power control. Through the embodiments of the present disclosure, the transmission power control of the terminal in the side link communication can be realized. Compared with previous power control mechanisms, the power control scheme of the present disclosure can reduce power waste, reduce interference, and improve overall system performance to a certain extent.

Description of the drawings

The present disclosure can be better understood from the following description of the specific embodiments of the present disclosure in conjunction with the accompanying drawings, wherein the same or similar reference signs indicate the same or similar features.

FIG. 1 is a flowchart of a power control method according to an embodiment of the disclosure.

FIG. 2 is a schematic diagram of an application scenario effect of an embodiment of the disclosure.

FIG. 3 is a structural block diagram of a power control device according to an embodiment of the disclosure.

Fig. 4 is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

The embodiments of the present disclosure provide a power control method, which is applied to a terminal device, and the power control method includes:

In the side link communication, the first terminal determines the type of the power control target terminal based on the second information, wherein the first terminal is the information receiving terminal in the side link communication, and the second information is determined by the second information. A terminal is obtained from the outside or measured by the first terminal.

Using the foregoing embodiments of the present disclosure, the type of the power control target terminal in the side link communication can be determined, and the determination of the power control target terminal can be assisted.

Fig. 1 shows a flowchart of a power control method according to another embodiment of the present disclosure, which is applied to a terminal device, and the method includes:

S101: In side link communication, a second terminal receives power control request information from a first terminal, and the first terminal is an information receiving terminal in the side link communication;

S102: The second terminal determines the transmit power of the second terminal based on the first information; wherein the first information is obtained from the outside by the second terminal or obtained by measurement by the second terminal.

In the embodiment of the present disclosure, the second terminal is a power control target terminal, which may be a terminal that causes interference in side link communication, or may be an information sending terminal in side link communication. Using the embodiments of the present disclosure, the power control target terminal can adjust its own transmission power, thereby achieving the purpose of power control of the target terminal.

Fig. 2 shows a schematic diagram of an application scenario of an embodiment of the present disclosure. In this scenario, there are multiple end-to-end communication links for Sidelink communication at the same time. Specifically, the first sending terminal TX1 in FIG. 2 sends data to the first receiving terminal RX1, and the second sending terminal TX2 sends data to the second receiving terminal RX2.

For ease of description, assume that during the communication process, TX1 will cause interference to RX2, and TX2 will cause interference to RX1; according to the embodiments of the present disclosure, if the communication quality of the link TX2 to RX2 is poor, RX2 can be based on external Based on the information obtained or the measurement information of RX2, it is determined that the reason for the poor communication quality of the link is that the interference caused by TX1 is larger, and the energy of TX1 to RX2 is greater than the energy of TX2 to RX2.

Based on this, RX2 can determine that TX1 is the power control target terminal, and RX2 sends power control request information to TX1. After TX1 receives the power control request information, it can adjust the transmission power of TX1 based on information obtained from the outside world or measurement information based on TX1, for example, to reduce (or increase) the transmission power.

Hereinafter, the implementation process of the power control method will be described in detail from various aspects of the embodiments of the present disclosure.

For the convenience of description, hereinafter, "power control" is abbreviated as "power control", "transmitting terminal" is abbreviated as "originating UE", "receiving terminal" is abbreviated as "receiving UE", and "interfering terminal" is abbreviated It is "Interfering UE".

The technical terms and corresponding abbreviations that may be involved in the embodiments of the present disclosure are:

Physical sidelink control channel: Physical sidelink control channel, PSCCH;

Physical sidelink data channel: Physical sidelink share channel, PSSCH;

Physical sidelink feedback channel: Physical sidelink feedback channel, PSFCH;

Reference signal receiving power: Reference signal receiving power, RSRP;

Sidelink control information: Sidelink Control Information, SCI;

Sidelink feedback control information: Sidelink feedback control information, SFCI;

Signal to Interference plus Noise Ratio: Signal to Interference plus Noise Ratio, SINR;

Block error rate: Block Error Ratio, BLER;

Channel quality indicator: Channel Quality Indicator, CQI;

Reference signal receiving quality: Reference Signal Receiving Quality, RSRQ;

Received Signal Strength Indication, RSSI;

Hybrid automatic retransmission request: Hybrid Automatic Repeat reQuest, HARQ;

Service quality: Quality of Service, QoS.

Determining the type of the power control target UE in the embodiments of the present disclosure can be achieved by but not limited to the following methods:

According to the embodiments of the present disclosure, the receiving UE can determine the type of the power control target UE based on the information X, where the information X can be obtained by the receiving UE from the outside or measured by the receiving UE.

Specifically, regarding the information X, it may include at least one of the following various information: historical measurement information in a sensing window, channel measurement information, interference measurement information, de-control information, side link Auxiliary information and data packet statistics result information of other terminals in communication.

More specifically, the information X may include at least one of the following various information: signal to interference plus noise ratio of the receiving end SINR, block error rate BLER, channel quality indicator CQI, reference signal received power RSRP, reference signal received Quality RSRQ, received signal strength indicator RSSI, path loss (pathloss), geographic location information, number of interference sources, transmission type is unicast, transmission type is multicast, transmission type is broadcast, service quality QoS requirements, channel occupancy rate.

In the embodiment of the present disclosure, the type of the power control target UE may be the originating UE or the interfering UE, which can be determined by information X. The following example illustrates the determination process.

In an embodiment of the present disclosure, if the information X includes the receiving end SINR, the receiving end SINR is compared with the first threshold value to determine the type of the power control target UE in the side link communication, where ,

Optionally, if the SINR at the receiving end is greater than the first threshold, it is determined that the type of the power control target UE is the transmitting end;

Optionally, if the SINR at the receiving end is less than or equal to the first threshold, and the transmitting power of the transmitting UE is good enough (for example, compared with the second threshold), it is determined in the following manner:

Optionally, if the SINR at the receiving end is less than or equal to the first threshold value, and the transmit power of the originating UE is greater than or equal to the second threshold value, it is determined that the type of the power control target UE is an interfering UE;

Optionally, if the SINR at the receiving end is less than or equal to the first threshold value, and the transmitting power of the originating UE is less than the second threshold value, it is determined that the type of the power control target UE is the originating UE.

In an embodiment of the present disclosure, if the information X includes BLER, the BLER is compared with a third threshold value to determine the type of power control target UE in the side link communication, where:

Optionally, if the BLER is less than the third threshold, it is determined that the type of the power control target UE is the originating UE;

Optionally, if the BLER is less than the third threshold value and the sending power of the originating UE is good enough (for example, compared with the fourth threshold value), it is determined in the following manner:

Optionally, if the BLER is greater than or equal to the third threshold value, and the transmit power of the originating UE is greater than or equal to the fourth threshold value, it is determined that the type of the power control target UE is an interfering UE;

If the BLER is greater than or equal to the third threshold value and the transmit power of the originating UE is less than the fourth threshold value, the type of the power control target UE is determined to be the originating UE.

In a scenario where the power control target UE is an interfering UE, the type of the power control target UE can be determined based on the foregoing embodiments of the present disclosure. If it is determined that the type of the power control target UE is an interfering UE, in this case, the receiving UE may determine the power control target UE among one or more interfering UEs based on the measurement result. The measurement result described here may include the aforementioned information X.

The number of power control target UEs in the embodiments of the present disclosure may be one or multiple. The following examples illustrate the process of determining power control target UEs among one or more interfering UEs.

In an embodiment of the present disclosure, if the measurement result includes the RSRP of at least one interfering link, the RSRP of the at least one interfering link is compared with the fifth threshold to determine the power control target UE, where

Optionally, if the RSRP of the first interference link is greater than the fifth threshold, determine the interference UE corresponding to the first interference link as the power control target UE;

Optionally, if the RSRPs of the multiple interference links in the at least one interference link are all greater than the fifth threshold, the multiple interference UEs corresponding to the multiple interference links are all used as the power control target UEs ；

Optionally, if the RSRPs of multiple interfering links are all greater than the fifth threshold, the interfering link with the largest RSRP among the multiple interfering links is determined, and the interference corresponding to the interfering link with the largest RSRP is determined The UE serves as the power control target UE.

Wherein, the fifth threshold value may be the RSRP of the signal link or the sum of the RSRP of the signal link and the compensation value (for example, -8dB).

In an embodiment of the present disclosure, if the measurement result includes the pathloss of at least one link, the pathloss of the at least one link is compared with the sixth threshold to determine the power control target UE, among them,

Optionally, if the pathloss of the second link is less than the sixth threshold, the interfering UE corresponding to the second link is determined as the power control target UE.

Wherein, the sixth threshold value may be the pathloss of the signal link or the sum of the pathloss and a preset compensation value (for example, -8dB).

The power control request information will be further described below in conjunction with embodiments.

In the embodiment of the present disclosure, after determining the power control target UE, the receiving end UE sends power control request information to the power control target UE, and the power control request information is used to request the power control target UE to adjust the transmit power.

In detail, taking the power control target UE as the interfering UE as an example, the receiving end UE requests the interfering UE to perform power adjustment, and the receiving end UE can send power control request information to the power control target UE at its next transmittable moment.

Here, the next transmittable moment may be PSSCH, PSCCH or PSFCH. The power control request information can be sent in the form of unicast, multicast or broadcast.

Optionally, the power control request information may take at least one of the following multiple forms: part of the feedback information sent to the interfering UE in the physical side link feedback channel PSFCH, and in the physical side link data channel PSSCH Part of the data information sent to the interfering UE, part of the control information transmitted in the physical side link control channel PSCCH, or part of the high-level signaling.

Optionally, the power control request information may be in the form of: as L1 feedback similar to multi-threaded and multi-connection TPC, as a kind of data information sent to the interfering UE in the PSSCH, or as the side link control information in the SCI Part of it is transmitted in PSCCH.

The power adjustment methods of the power control target UE in the embodiments of the present disclosure include but are not limited to the following methods:

After the power control target UE in the embodiment of the present disclosure receives the power control request information, it can determine the transmission power based on the information Y, which can specifically include determining whether to perform power adjustment, and if the adjustment is to increase or decrease the transmission power, etc.

Specifically, regarding the information Y, it may include at least one of the following various information: feedback information of the receiving end UE in side-link communication, historical measurement information in the sensing window, and power control request information received Quantity, frequency of receiving power control request information, service priority, auxiliary information of other terminals in side link communication.

More specifically, the information Y may include at least one of the following various information: receiving UE SINR, BLER, HARQ, Channel State Indicator (CSI), RSRP, RSRQ, RSSI, power control request The transmission type of information is unicast, the transmission type of power control request information is multicast, and the transmission type of power control request information is broadcast, QoS requirements, and channel occupancy rate.

In the embodiment of the present disclosure, the power adjustment of the power control target UE may be increased, may be decreased, or may not be adjusted, which can be determined by information Y. The following takes the power control target UE as an interfering UE as an example to describe the determination process.

In an embodiment of the present disclosure, if the information Y includes the receiving end SINR, the receiving end SINR is compared with the seventh threshold, where:

Optionally, if the SINR at the receiving end is greater than the seventh threshold, it is determined to reduce the transmission power;

Optionally, if the SINR at the receiving end is less than or equal to the seventh threshold, it is determined not to adjust the transmit power.

Wherein, the seventh threshold value may be the SINR related to the modulation and coding scheme (Modulation and Coding Scheme, MCS) of this transmission. For example, when the BLER is a preset percentage (such as 10%), the theoretical SINR value corresponding to the MCS.

In an embodiment of the present disclosure, if the information Y includes CQI, the CQI is compared with the eighth threshold, where:

Optionally, if the CQI is greater than the eighth threshold, it is determined to reduce the transmission power;

Optionally, if the CQI is less than or equal to the eighth threshold, it is determined not to adjust the transmission power.

Wherein, the eighth threshold value may be the efficiency value of the MCS for this transmission (ie, the product of the modulation order and the code rate).

In an embodiment of the present disclosure, if the power control request information received by the power control target UE includes display indication information, the power control target UE (for example, an interfering UE) adjusts its own transmission power according to the display indication information.

Wherein, the display indication information indicates that the power control target UE adjusts the transmit power in a specified manner, for example, the display indicates that the transmit power is adjusted (can be increased or decreased), and the adjustment range (ie, step size) may also be indicated.

Optionally, the transmit power adjustment manner in the embodiment of the present disclosure includes but is not limited to the following implementation manners:

The embodiments of the present disclosure may adopt multiple methods to adjust the transmit power of the power control target UE, and different adjustment methods are different in terms of adjustment time, adjustment times, and/or adjustment steps.

The following examples illustrate the adjustment method in detail, which is applicable to the case where the power control target UE is the interfering UE or the originating UE.

In an embodiment of the present disclosure, if the power control target UE receives multiple power control request messages within a unit duration, the transmit power is adjusted once within the unit duration. Among them, the adjustment step may be a preset fixed step. For example, the step size of the power adjustment may be a fixed step size (such as 2dB) pre-configured by the network or predefined by the protocol.

In an embodiment of the present disclosure, if the power control target UE receives multiple power control request information within a unit time period, the transmit power is adjusted once within the unit time period, and according to the received power control request information The number determines the adjustment step length, for example, the adjustment step length is the product of the number of received power control request information and a predefined fixed step length.

In an embodiment of the present disclosure, iterative power adjustment may also be performed. Specifically, if the power control target UE receives N power control request messages within a unit duration, the transmit power is adjusted N times within the unit duration. (N is a positive integer). Wherein, the number of iterations (that is, the number of adjustments to the transmission power) should be less than or equal to a predetermined number. For example, when the number of iterations reaches the number pre-configured by the network or the number predefined by the protocol, the power adjustment is stopped.

It should be noted that the unit duration may be: a time slot, a subframe, a symbol, or a frame.

In addition, in an embodiment of the present disclosure, if the transmit power adjusted for the i-th time is less than the first predetermined threshold, the transmit power of the power control target UE is no longer reduced, and a power hovering instruction may be sent to a higher layer.

In an embodiment of the present disclosure, if the transmit power adjusted for the jth time is greater than the second predetermined threshold, the transmit power of the power control target UE is no longer increased, and a power hovering instruction may be sent to a higher layer.

Wherein, both the first predetermined threshold and the second predetermined threshold can be determined in at least one of the following ways: determined based on high-level configuration information, determined based on a predetermined protocol, and determined based on a predefined manner.

In an embodiment of the present disclosure, if the power control request information includes display indication information, the power control target UE adjusts (such as increasing or decreasing) its own transmission power according to the display indication information, and the display indication information is used to indicate the power. The target UE is controlled to adjust the transmit power in a specified manner, and a specific adjustment step size can also be indicated.

In a scenario where the power control target UE is the originating UE, the type of the power control target UE can be determined based on the foregoing embodiments of the present disclosure. If it is determined that the power control target UE is the originating UE, in this case, the originating UE can receive the report information carried by the receiving UE on the SCI, SFCI, PSCCH, PSSCH, PSFCH or higher layer signaling, and transmit power according to the reported information Adjustment.

Wherein, the reported information may include at least one of the following: receiving end SINR, BLER, HARQ, CSI, RSRP, RSRQ, RSSI, pathloss, geographic location information, number of interference sources, display indication information.

In an embodiment of the present disclosure, if the reported information includes the receiving end SINR, the receiving end SINR is compared with the ninth threshold, where:

Optionally, if the SINR at the receiving end is greater than the ninth threshold, the transmit power is reduced;

Optionally, if the SINR at the receiving end is less than or equal to the ninth threshold, the transmit power is increased.

Wherein, the ninth threshold value may be the SINR related to the modulation and coding scheme MCS of this transmission. For example, when the BLER is a preset percentage (such as 10%), the theoretical SINR value corresponding to the MCS.

In an embodiment of the present disclosure, if the reported information includes CQI, the CQI is compared with the tenth threshold, where:

Optionally, if the CQI is greater than the tenth threshold, reduce the transmit power;

Optionally, if the CQI is less than or equal to the tenth threshold, increase the transmit power.

Wherein, the tenth threshold value may be the efficiency value corresponding to the MCS used this time (that is, the product of the modulation order and the code rate).

In an embodiment of the present disclosure, if the reported information includes HARQ and is unicast transmission, where:

Optionally, if HARQ ACK is received, reduce the transmit power;

Optionally, if HARQ NACK is received, increase the transmit power.

In an embodiment of the present disclosure, if the reported information includes HARQ and is multicast transmission, the ratio of ACK to NACK is compared with the eleventh threshold, where:

Optionally, if the ratio is greater than the eleventh threshold, the transmit power is reduced;

Optionally, if the ratio is less than or equal to the eleventh threshold, the transmission power is increased.

In an embodiment of the present disclosure, if the reported information includes display indication information, the power control target UE adjusts (such as increasing or decreasing) its own transmission power according to the display indication information; wherein the display indication information is used for Instruct the power control target UE to adjust the transmit power in a specified manner, and also indicate a specific adjustment step.

It should be noted that in the foregoing various embodiments of the present disclosure, the multiple thresholds mentioned (such as the first threshold, the second threshold, the third threshold, etc.) are all It can be determined in multiple ways, for example, it can be pre-configured by the network, or pre-defined by a protocol, or set to have a mapping relationship with a preset fixed value.

The embodiments of the present disclosure provide a power control method on a sidelink. The power control target UE can adjust the transmission power based on request information, feedback information, or measurement results. The present disclosure can realize the transmission power control of the UE, achieve the purpose of interference coordination, increase the system throughput, and improve the overall performance of the system. Compared with the previous power control mechanism, the present disclosure can also implement power control without network coverage, which can make the power control effect better and more accurate, and achieve the purposes of reducing power waste, reducing interference, and improving overall system performance.

The following describes the process of implementing power control in side link communication based on the power control method of the embodiments of the present disclosure through a number of specific embodiments.

Example one

In this implementation, all UEs communicate with a maximum transmission power of 23dBm at the initial stage. In a certain transmission time interval TTI, UE1 communicates with UE2, UE3 communicates with UE4, and UE5 communicates with UE6 (the former is TX and the latter is RX).

1. UE2 measures that the SINR at the receiving end is 1dB, and UE2's demodulation control information learns that UE1 uses CQI level 7 for data transmission, so that when the BLER is 10%, the threshold SINR value corresponding to the CQI level is about 5dB.

2. UE2 compares the receiving end SINR with the threshold SINR, because the receiving end SINR is less than the threshold SINR, then for UE2, compare the interference link RSRP with the signal link RSRP, for example:

The RSRP1 of the signal link is -90dBm,

The RSRP2 of the interference link corresponding to UE3 is -85dBm,

The RSRP3 of the interference link corresponding to UE5 is -92dBm.

Comparing RSRP1, RSRP2 and RSRP3, because RSRP2 is greater than RSRP1, and RSRP3 is less than RSRP1, it is determined that UE3 is the power control target UE.

3. UE2 sends a power adjustment request to UE3.

4. After UE3 receives the power adjustment request, it determines whether to perform power adjustment according to the comparison result of its own receiving end SINR and the threshold value. UE3 measures that the receiving end SINR is 10dB, and the corresponding threshold SINR value is about 5dB. If the SINR at the receiving end is greater than the threshold SINR, UE3 reduces its own transmission power by 23dBm-2dB=21dBm.

Example two

In this implementation, all UEs communicate with a maximum transmission power of 23dBm at the initial stage. In a certain TTI, UE1 communicates with UE2, UE3 communicates with UE4, and UE5 communicates with UE6 (the former is TX and the latter is RX).

1. The BLER of the receiving end UE2 receiving data is 15%, and the threshold BLER is 10%.

2. UE2 compares the receiving end BLER with the threshold BLER, because the receiving end BLER is greater than the threshold BLER. Then, for UE2, compare the interference link pathloss with the signal link pathloss, for example:

The pathloss1 of the signal link is 90dB,

The pathloss2 of the interference link corresponding to UE3 is 80dB,

The pathloss3 of the interference link corresponding to UE5 is 110dB.

Compare pathloss1, pathloss2 and pathloss3.

Because pathloss2 is less than pathloss1 and pathloss3 is greater than pathloss1, it is determined that UE3 is the power control target UE.

3. UE2 displays and instructs UE3 to reduce the transmit power by 2dB.

4. UE3 receives the display indication information and reduces its own transmission power by 23dBm-2dB=21dBm.

Example three

1. UE2 reports its receiving end SINR=20dB to the sending end UE1.

2. According to the CQI level used by the sender UE1 to send data, it is determined that when the BLER is 10%, the threshold SINR value corresponding to the CQI level is about 5dB.

3. The sending end UE1 compares the receiving end SINR and the threshold SINR reported by UE2. Because the receiving end SINR is greater than the threshold SINR, UE1 reduces its own transmission power by 23dBm-2dB=21dBm.

Example four

1. The receiving end UE2 measures that the receiving end SINR is 20dB, and the demodulation control information of UE2 learns that UE1 uses CQI level 7 for data transmission, so that when the BLER is 10%, the threshold SINR value corresponding to the CQI level is about 5dB.

2. UE2 compares the receiving end SINR with the threshold SINR, because the receiving end SINR is greater than the threshold SINR, it sends an instruction to reduce the transmission power to UE1.

3. UE1 reduces its own transmission power by 23dBm-2dB=21dBm according to the received display instruction information.

Corresponding to the aforementioned power control method, the present disclosure also provides a power control device, which is applied to a terminal. Referring to FIG. 3, it includes:

The information receiving module 10 is configured to receive power control request information from a first terminal in side link communication, where the first terminal is an information receiving terminal in side link communication;

The transmitting power determining module 20 is configured to determine the transmitting power of the second terminal based on the first information; wherein, the first information is obtained from the outside by the second terminal or obtained by measurement by the second terminal.

Optionally, the first information includes at least one of the following: feedback information of the receiving terminal in the side link communication, historical measurement information in the perception window, the number of received power control request information, and the received power control The frequency of requesting information, the priority of the service, and the auxiliary information of the remaining terminals in the side link communication.

Optionally, if the first information includes the SINR of the receiving terminal, compare the SINR of the receiving terminal with a first threshold to determine the transmit power of the second terminal in the side link communication; Wherein, the first threshold value is determined by at least one of the following methods: determination based on high-level configuration information, determination based on a predetermined protocol, and determination based on a predefined manner.

Optionally, the manner of adjusting the transmission power includes: if the second terminal receives multiple power control request information within a unit duration, adjusting the transmission power once within the unit duration.

Optionally, the method for adjusting the transmission power includes: if the second terminal receives multiple power control request information within a unit duration, adjusting the transmission power once within the unit duration, and according to the received power control request The amount of information determines the adjustment step.

Optionally, the adjustment step size is a product of the number of received power control request information and a predetermined step size.

Optionally, the transmission power adjustment method includes: if the second terminal receives N power control request information within a unit duration, adjusting the transmission power N times within the unit duration, where N is a positive integer.

Optionally, the unit duration is determined according to at least one of the following: time slot, subframe, symbol, frame.

Optionally, if the transmit power adjusted for the i-th time is less than the first predetermined threshold, the transmit power of the second terminal is no longer reduced, where i is a positive integer, and the first predetermined threshold is determined by At least one way is determined: based on high-level configuration information, based on a predetermined protocol, and based on a predefined way.

Optionally, if the transmit power adjusted for the jth time is greater than a second predetermined threshold, the transmit power of the second terminal is no longer increased, where j is a positive integer, and the second predetermined threshold is determined by At least one way is determined: based on high-level configuration information, based on a predetermined protocol, and based on a predefined way.

Optionally, if the power control request information includes display indication information, the second terminal adjusts the transmission power according to the display indication information.

Corresponding to the aforementioned power control method, the present disclosure also provides a power control device applied to a terminal, which includes:

The type determination module is configured to determine the type of the power control target terminal based on the second information in side link communication; wherein, the type determination module is located in the information receiving terminal in the side link communication, and the second information is determined by The first terminal is obtained from the outside or obtained by measurement by the first terminal.

Optionally, the second information includes at least one of the following: historical measurement information in the perception window, channel measurement information, interference measurement information, de-control information, auxiliary information of the remaining terminals in the side link communication, Packet statistics result information.

Optionally, if the second information includes the SINR of the receiving terminal, the SINR of the receiving terminal is compared with a second threshold to determine the type of the power control target terminal in the side link communication; wherein, The second threshold value is determined by at least one of the following methods: determination based on high-level configuration information, determination based on a predetermined protocol, and determination based on a predefined manner.

Optionally, in a case where it is determined that the type of the power control target terminal is an interfering terminal, the power control apparatus further includes: a target terminal determining module, configured to determine power among one or more interfering terminals based on the measurement result Control the target terminal; wherein the measurement result includes at least one of the second information.

Optionally, if the measurement result includes the RSRP of the interfering link, the RSRP is compared with a third threshold value to determine the power control target terminal in the side link communication.

Optionally, the third threshold value is the RSRP of the signal link or the sum of the RSRP of the signal link and a preset compensation value.

Optionally, after determining the power control target terminal, the power control device further includes: an information sending module, configured to send power control request information to the power control target terminal, wherein the power control request information is used to request The power control target terminal adjusts the transmission power.

Optionally, the power control request information takes at least one of the following multiple forms: part of the feedback information sent to the interfering terminal in the physical side link feedback channel PSFCH, and in the physical side link data channel PSSCH Part of the data information sent to the interfering terminal and the control information transmitted in the physical side link control channel PSCCH.

Optionally, the transmission type of the power control request information is at least one of the following modes: unicast, multicast, and broadcast.

Using the power control device of the embodiment of the present disclosure, the power control target UE can adjust the transmission power based on request information, feedback information, or measurement results. The present disclosure can realize the transmission power control of the UE, achieve the purpose of interference coordination, increase the system throughput, and improve the overall performance of the system. Compared with the previous power control mechanism, the present disclosure can also implement power control without network coverage, which can make the power control effect better and more accurate, and achieve the purposes of reducing power waste, reducing interference, and improving overall system performance.

4 is a schematic diagram of the hardware structure of a mobile terminal that implements an embodiment of the present disclosure,

The mobile terminal 100 includes but is not limited to: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and Power supply 111 and other components. Those skilled in the art can understand that the structure of the mobile terminal shown in FIG. 4 does not constitute a limitation on the mobile terminal. The mobile terminal may include more or less components than those shown in the figure, or combine certain components, or different components. Layout. In the embodiments of the present disclosure, mobile terminals include, but are not limited to, mobile phones, tablet computers, notebook computers, palmtop computers, vehicle-mounted terminals, wearable devices, and pedometers.

The mobile terminal using the embodiments of the present disclosure can control the transmission power of the terminal, and achieve the purpose of interference coordination, improvement of system throughput, and improvement of overall system performance.

It should be understood that, in the embodiment of the present disclosure, the radio frequency unit 101 can be used for receiving and sending signals in the process of sending and receiving information or talking. Specifically, the downlink data from the base station is received and processed by the processor 110; in addition, Uplink data is sent to the base station. Generally, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with the network and other devices through a wireless communication system.

The mobile terminal provides users with wireless broadband Internet access through the network module 102, such as helping users to send and receive emails, browse web pages, and access streaming media.

The audio output unit 103 can convert the audio data received by the radio frequency unit 101 or the network module 102 or stored in the memory 109 into audio signals and output them as sounds. Moreover, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., call signal reception sound, message reception sound, etc.). The audio output unit 103 includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used to receive audio or video signals. The input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042, and the graphics processor 1041 is configured to monitor images of still pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. Data is processed. The processed image frame can be displayed on the display unit 106. The image frame processed by the graphics processor 1041 may be stored in the memory 109 (or other storage medium) or sent via the radio frequency unit 101 or the network module 102. The microphone 1042 can receive sound, and can process such sound into audio data. The processed audio data can be converted into a format that can be sent to the mobile communication base station via the radio frequency unit 101 for output in the case of a telephone call mode.

The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of the ambient light. The proximity sensor can close the display panel 1061 and the display panel 1061 when the mobile terminal 100 is moved to the ear. / Or backlight. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (usually three axes), and can detect the magnitude and direction of gravity when it is stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games) , Magnetometer attitude calibration), vibration recognition related functions (such as pedometer, percussion), etc.; the sensor 105 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, Infrared sensors, etc., will not be repeated here.

The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), etc.

The user input unit 107 can be used to receive inputted numeric or character information, and generate key signal input related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 includes a touch panel 1071 and other input devices 1072. The touch panel 1071, also called a touch screen, can collect the user's touch operations on or near it (for example, the user uses any suitable objects or accessories such as fingers, stylus, etc.) on the touch panel 1071 or near the touch panel 1071. operating). The touch panel 1071 may include two parts: a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch position, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and then sends it To the processor 110, the command sent by the processor 110 is received and executed. In addition, the touch panel 1071 can be implemented in multiple types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Specifically, other input devices 1072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackball, mouse, and joystick, which will not be repeated here.

Further, the touch panel 1071 can be overlaid on the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it is transmitted to the processor 110 to determine the type of the touch event. The type of event provides corresponding visual output on the display panel 1061. Although in FIG. 4, the touch panel 1071 and the display panel 1061 are used as two independent components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated The implementation of the input and output functions of the mobile terminal is not specifically limited here.

The interface unit 108 is an interface for connecting an external device with the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power source (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, audio input/output (input/output, I/O) port, video I/O port, headphone port, etc. The interface unit 108 may be used to receive input (for example, data information, power, etc.) from an external device and transmit the received input to one or more elements in the mobile terminal 100 or may be used to connect to the mobile terminal 100 and external Transfer data between devices.

The memory 109 can be used to store software programs and various data. The memory 109 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function (such as a sound playback function, an image playback function, etc.), etc.; Data (such as audio data, phone book, etc.) created by the use of mobile phones. In addition, the memory 109 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The processor 110 is the control center of the mobile terminal. It uses various interfaces and lines to connect the various parts of the entire mobile terminal, runs or executes software programs and/or modules stored in the memory 109, and calls data stored in the memory 109 , Perform various functions of the mobile terminal and process data, so as to monitor the mobile terminal as a whole. The processor 110 may include one or more processing units; optionally, the processor 110 may integrate an application processor and a modem processor, where the application processor mainly processes the operating system, user interface, and application programs, etc. The adjustment processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 110.

The mobile terminal 100 may also include a power source 111 (such as a battery) for supplying power to various components. Optionally, the power source 111 may be logically connected to the processor 110 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions.

In addition, the mobile terminal 100 includes some functional modules not shown, which will not be repeated here.

The terminal device provided in the embodiment of the present disclosure can implement each process implemented by the mobile terminal in the foregoing method embodiment, and to avoid repetition, details are not described herein again.

Optionally, an embodiment of the present disclosure further provides a mobile terminal, including a processor 110, a memory 109, a computer program stored in the memory 109 and running on the processor 110, and the computer program is executed by the processor 110 Each process of the above-mentioned power control method embodiment is realized at a time, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.

The embodiments of the present disclosure also provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, each process of the above-mentioned power control method embodiment is realized, and the same technology can be achieved The effect, in order to avoid repetition, will not be repeated here. Wherein, the computer-readable storage medium, such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk, or optical disk, etc.

It should be noted that, in this article, the terms "including", "including" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, hardware can also be used, but in many cases the former is better.的实施方式。 Based on this understanding, the technical solution of the present disclosure can be embodied in the form of a software product in essence or the part that contributes to the related technology. The computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk). ) Includes several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present disclosure.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of the present disclosure.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which is not repeated here.

In the embodiments provided in this application, it should be understood that the disclosed device and method may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software function unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present disclosure essentially or the part that contributes to the related technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several The instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by controlling the relevant hardware through a computer program. The program can be stored in a computer readable storage medium. When executed, it may include the procedures of the above-mentioned method embodiments. Wherein, the storage medium may be a magnetic disk, an optical disc, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM), etc.

It can be understood that the embodiments described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application specific integrated circuits (ASICs), digital signal processors (Digital Signal Processor, DSP), digital signal processing equipment (DSP Device, DSPD), programmable Logic device (Programmable Logic Device, PLD), Field-Programmable Gate Array (Field-Programmable Gate Array, FPGA), general-purpose processors, controllers, microcontrollers, microprocessors, and others for performing the functions described in this disclosure Electronic unit or its combination.

For software implementation, the technology described in the embodiments of the present disclosure can be implemented by modules (for example, procedures, functions, etc.) that perform the functions described in the embodiments of the present disclosure. The software codes can be stored in the memory and executed by the processor. The memory can be implemented in the processor or external to the processor.

The embodiments of the present disclosure are described above with reference to the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present disclosure, many forms can be made without departing from the purpose of the present disclosure and the scope of protection of the claims, all of which fall within the protection of the present disclosure.

Claims

A power control method, applied to a terminal, includes:

In the side link communication, the second terminal receives power control request information from the first terminal, and the first terminal is the information receiving terminal in the side link communication;

The second terminal determines the transmit power of the second terminal based on the first information; wherein the first information is obtained from the outside by the second terminal or obtained by measurement by the second terminal.
The method of claim 1, wherein:

The first information includes at least one of the following: feedback information of the receiving terminal in side-link communication, historical measurement information in the sensing window, the number of received power control request information, and the frequency of receiving power control request information , The priority of the business, the auxiliary information of the other terminals in the side link communication.
The method of claim 1, wherein:

If the first information includes the signal-to-interference-and-noise ratio SINR of the receiving terminal, compare the receiving terminal SINR with a first threshold to determine the transmission of the second terminal in the side link communication. Power; where,

The first threshold value is determined by at least one of the following methods: determination based on high-level configuration information, determination based on a predetermined protocol, and determination based on a predefined manner.
The method of claim 1, wherein:

The method for adjusting the transmission power includes: if the second terminal receives multiple power control request information within a unit duration, the transmission power is adjusted once within the unit duration.
The method of claim 1, wherein:

The transmission power adjustment method includes: if the second terminal receives multiple power control request information within a unit time period, adjust the transmission power once within the unit time period, and determine according to the quantity of received power control request information Adjust the step size.
The method of claim 5, wherein:

The adjustment step size is a product of the number of received power control request information and a predetermined step size.
The method of claim 1, wherein:

The method for adjusting the transmission power includes: if the second terminal receives N power control request information within a unit duration, adjusting the transmission power N times within the unit duration, where N is a positive integer.
The method according to claim 7, wherein:

The number of times the second terminal adjusts the transmit power is less than or equal to a predetermined number of times.
The method according to any one of claims 4-8, wherein:

The unit duration is determined according to at least one of the following: time slot, subframe, symbol, frame.
The method according to any one of claims 4-8, wherein:

If the transmit power adjusted for the i-th time is less than the first predetermined threshold, the transmit power of the second terminal is no longer reduced, where i is a positive integer, and the first predetermined threshold is in at least one of the following ways Determine: Determine based on high-level configuration information, based on a predetermined protocol, and based on a predefined method.
The method according to any one of claims 4-8, wherein:

If the transmit power adjusted for the jth time is greater than the second predetermined threshold, the transmit power of the second terminal is no longer increased, where j is a positive integer, and the second predetermined threshold is in at least one of the following ways Determine: Determine based on high-level configuration information, based on a predetermined protocol, and based on a predefined method.
The method of claim 1, wherein:

If the power control request information includes display indication information, the second terminal adjusts the transmission power according to the display indication information.
A power control method, applied to a terminal, includes:

In the side link communication, the first terminal determines the type of the power control target terminal based on the second information; wherein, the first terminal is the information receiving terminal in the side link communication, and the second information is determined by the The first terminal is obtained from the outside or measured by the first terminal.
The method of claim 13, wherein:

The second information includes at least one of the following: historical measurement information in the perception window, channel measurement information, interference measurement information, de-control information, auxiliary information of other terminals in side link communication, and data packet statistics results information.
The method of claim 13, wherein:

If the second information includes the signal-to-interference plus noise ratio SINR of the receiving terminal, compare the receiving terminal SINR with a second threshold to determine the type of power control target terminal in the side link communication; among them,

The second threshold value is determined by at least one of the following methods: determination based on high-level configuration information, determination based on a predetermined protocol, and determination based on a predefined manner.
The method of claim 13, wherein:

In the case of determining that the type of the power control target terminal is an interfering terminal, the method further includes:

The first terminal determines a power control target terminal among one or more interfering terminals based on a measurement result; wherein the measurement result includes at least one of the second information.
The method of claim 16, wherein:

If the measurement result includes the reference signal received power RSRP of the interfering link, the RSRP is compared with a third threshold value to determine the power control target terminal in the side link communication.
The method of claim 17, wherein:

The third threshold value is the RSRP of the signal link or the sum of the RSRP of the signal link and a preset compensation value.
The method of claim 16, wherein:

After determining the power control target terminal, the method further includes:

The first terminal sends power control request information to the power control target terminal, where the power control request information is used to request the power control target terminal to adjust the transmit power.
The method of claim 19, wherein:

The power control request information takes at least one of the following multiple forms: part of the feedback information sent to the interfering terminal in the physical side link feedback channel PSFCH, and sent to the interfering terminal in the physical side link data channel PSSCH Part of the control information transmitted in the physical side link control channel PSCCH.
The method of claim 19, wherein:

The transmission type of the power control request information is at least one of the following modes: unicast, multicast, and broadcast.
A power control device applied to a terminal, including:

An information receiving module, configured to receive power control request information from a first terminal in side link communication, where the first terminal is an information receiving terminal in side link communication;

The transmitting power determining module is configured to determine the transmitting power of the second terminal based on the first information; wherein the first information is obtained from the outside by the second terminal or obtained by measurement by the second terminal.
A power control device applied to a terminal, including:

The type determination module is configured to determine the type of the power control target terminal based on the second information in side link communication; wherein, the type determination module is located in the information receiving terminal in the side link communication, and the second information is determined by The first terminal is obtained from the outside or obtained by measurement by the first terminal.
A terminal, comprising a processor, a memory, and a computer program stored on the memory and capable of running on the processor. The computer program is executed by the processor to implement any one of claims 1-12 The steps of the power control method according to item or the steps of the power control method according to any one of claims 13-21.
A computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it realizes the steps of the power control method according to any one of claims 1-12 or The steps of the power control method according to any one of claims 13-21.