WO2021003623A1

WO2021003623A1 - Method, apparatus, and device for controlling transmission power in direct connection communications, and storage medium

Info

Publication number: WO2021003623A1
Application number: PCT/CN2019/094949
Authority: WO
Inventors: 赵群
Original assignee: 北京小米移动软件有限公司
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2021-01-14
Also published as: CN110463234B; CN110463234A

Abstract

Provided in the present disclosure are a method, an apparatus, and a device for controlling transmission power in direct connection communications, and a storage medium, relating to the field of mobile communications, and the method comprising: a first UE sending an ith SL-RSRP report to a second UE; after a length of time T after sending the ith SL-RSRP report, the first UE restarting RSRP high layer filtering; and the first UE sending an i+1th RSRP report to the second UE, the i+1th SL-RSRP report being used to allow the second UE to control transmission power. In the present disclosure, the second UE is enabled to obtain a relatively accurate SL-RSRP report for the sending power after each adjustment, improving the accuracy of transmission power control during internet of vehicles communications of sending end user equipment, thereby reducing interference between various user equipment during internet of vehicles communications.

Description

Transmission power control method, device, equipment and storage medium of direct communication

Technical field

The present disclosure relates to the field of mobile communications, and in particular to a method, device, equipment and storage medium for transmitting power control of direct communication.

Background technique

Vehicle to Everything (V2X) is a new generation of information and communication technology that connects vehicles with everything. V stands for vehicles, and X stands for any object that interacts with the vehicle. At present, X mainly includes vehicles, people, Traffic roadside infrastructure and network. The information modes of V2X interaction include: between vehicle and vehicle (Vehicle to Vehicle, V2V), vehicle to road (Vehicle to Infrastructure, V2I), vehicle to person (Vehicle to Pedestrian, V2P), vehicle to network (Vehicle to Network, V2N) interaction.

In the fifth-generation mobile communication technology (5th-Generation, 5G), there is no reasonable solution for how to adjust a reasonable transmission power to reduce interference for unicast services and multicast services of direct communication.

Summary of the invention

The embodiments of the present disclosure provide a transmission power control method, device, equipment, and storage medium for direct communication, which can be used to solve the unicast service and multicast service for direct communication. How to adjust the sending end user equipment reasonably Power to reduce interference problems. The technical solution is as follows:

In one aspect, a transmission power control method for direct communication is provided, which is applied to a first UE in V2X, and the method includes:

The first UE sends the i-th Direct Link Reference Signal Received Power (SL-RSRP) report to the second UE, and the i-th SL-RSRP report is used for the second UE. The UE performs transmit power control, and i is an integer;

The first UE restarts the high-layer filtering of the SL-RSRP after sending the i-th SL-RSRP report after the duration of T;

The first UE sends an i+1th RSRP report to the second UE, and the i+1th SL-RSRP report is used for the second UE to perform transmit power control.

In an optional embodiment, said restarting the high-level filtering of SL-RSRP includes:

Initialize F _n-1 to 0;

Initialize F _n as M _n , and M _n is the most recent physical layer measurement result;

Restart the high-level filtering of the SL-RSRP according to the following formula:

F _n =(1-a)*F _n-1 +a*M _n ;

Wherein, the F _n-1 is the filtered measurement result before the update, the F _n is the filtered measurement result after the update, and a is a configuration parameter.

On the other hand, a transmission power control method for direct communication is provided, which is applied to a UE in V2X, and the method includes:

Receiving, by the second UE, the i-th SL-RSRP report sent by the first UE;

The second UE performs transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report;

Wherein, the i-th SL-RSRP report is generated after the first UE restarts the high-layer filtering of the SL-RSRP after the length of T after sending the i-1th SL-RSRP report.

On the other hand, there is provided a transmission power control method for direct communication, which is applied to a first UE in V2X, and the method includes:

Measuring the received power of the reference signal sent by the second UE by the first UE, and generating an SL-RSRP report without high-layer filtering;

The first UE sends the SL-RSRP report to the second UE, and the SL-RSRP report is used for the second UE to perform transmit power control.

On the other hand, there is provided a transmission power control method for direct communication, which is applied to a second UE in V2X, and the method includes:

Sending a reference signal by the second UE to the first UE;

Receiving, by the second UE, the SL-RSRP report reported by the first UE, where the SL-RSRP in the SL-RSRP report is the SL-RSRP without high-layer filtering;

The second UE performs transmit power control according to the SL-RSRP report.

In another aspect, there is provided a transmission power control device for direct communication, the device comprising:

A sending module configured to send an i-th SL-RSRP report to the second UE, where the i-th SL-RSRP report is used for the second UE to perform transmit power control, and i is an integer;

The restarting module is configured to restart the high-level filtering of the SL-RSRP after sending the i-th SL-RSRP report after T duration;

The sending module is configured to send an i+1th RSRP report to the second UE, and the i+1th SL-RSRP report is used for the second UE to perform transmit power control.

In an optional embodiment, the restarting module is configured to initialize F _n-1 to 0; initialize F _n to M _n , and M _{n to} be the most recent physical layer measurement result; restart all operations according to the following formula The high-level filtering of SL-RSRP:

F _n =(1-a)*F _n-1 +a*M _n ;

A receiving module configured to receive the i-th SL-RSRP report sent by the first UE;

An adjustment module, configured to perform transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report;

The measurement module is configured to measure the received power of the reference signal sent by the second UE, and generate an SL-RSRP report without high-layer filtering;

The sending module is configured to send the SL-RSRP report to the second UE, where the SL-RSRP report is used for the second UE to perform transmit power control.

A sending module configured to send a reference signal to the first UE;

A receiving module configured to receive the SL-RSRP report reported by the first UE, where the SL-RSRP in the SL-RSRP report is the SL-RSRP that has not been filtered by a higher layer;

The sending module is configured to perform transmission power control according to the SL-RSRP report.

In another aspect, a V2X receiving device is provided, and the device includes:

processor;

A transceiver connected to the processor;

Wherein, the processor is configured to load and execute executable instructions to implement the transmit power control method for direct communication performed by the first UE as described in the above aspect.

In another aspect, a V2X sending device is provided, and the device includes:

processor;

A transceiver connected to the processor;

Wherein, the processor is configured to load and execute executable instructions to implement the transmission power control method for direct communication performed by the second UE as described in the above aspect.

In another aspect, a computer-readable storage medium is provided, and the computer-readable storage medium stores at least one instruction, at least one program, code set or instruction set, the at least one instruction, the at least one program, The code set or the instruction set is loaded and executed by the processor to implement the transmission power control method for direct communication as described in the above aspect.

The beneficial effects brought about by the technical solutions provided by the embodiments of the present disclosure include at least:

By restarting the high-level filtering of SL-RSRP after sending the i-th SL-RSRP report, the i-th SL-RSRP report is used for the second UE to perform the i-th transmit power adjustment, and the first UE restarts The high-level filtering of the subsequent SL-RSRP performs long-term monitoring of the new transmit power adjusted for the i-th time of the second UE, thereby obtaining the i+1th SL-RSRP report, which is used for the i+1th SL-RSRP report For the second UE to perform the i+1th transmit power adjustment, so that the second UE can obtain a more accurate SL-RSRP report on the transmit power after each adjustment, and improve the sending end user equipment's The accuracy of the transmission power control reduces the interference between the various user equipments during the vehicle networking communication.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure;

Fig. 2 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure;

Fig. 3 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure;

Fig. 4 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure;

FIG. 5 shows a schematic diagram of time slot performance of a method for controlling transmit power of direct communication according to an exemplary embodiment of the present disclosure;

Fig. 6 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure;

FIG. 7 shows a schematic structural diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure;

FIG. 8 shows a schematic structural diagram of a transmission power control apparatus for direct communication provided by an exemplary embodiment of the present disclosure;

FIG. 9 shows a schematic structural diagram of a transmission power control apparatus for direct communication provided by an exemplary embodiment of the present disclosure;

FIG. 10 shows a schematic structural diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure;

Fig. 11 is a schematic structural diagram of a user equipment provided by another exemplary embodiment of the present disclosure.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following further describes the embodiments of the present disclosure in detail with reference to the accompanying drawings.

Fig. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present disclosure. The communication system may be a schematic diagram of a non-roaming 5G system architecture (Non-roaming 5G system architecture), and the system architecture may be applied to a vehicle to everything (V2X) service using D2D technology.

The system architecture includes a data network (Data Network, DN), and the data network is provided with a V2X application server (Application Server) required for V2X services. The system architecture also includes a 5G core network. The network functions of the 5G core network include: Unified Data Management (UDM), Policy Control Function (PCF), Network Exposure Function (NEF), Application function (AF), unified data storage (Unified Data Repository, UDR), access and mobility management function (Access and Mobility Management Function, AMF), session management function (Session Management Function, SMF), and user interface Function (User Plane Function, UPF).

The system architecture also includes: a radio access network (New Generation-Radio Access Network, NG-RAN) and four user equipments (ie, user equipment 1 to user equipment 4) shown by way of example, where each user equipment V2X application (Application) is installed. One or more access network devices, such as base stations (gNB), are set in the wireless access network.

In this system architecture, the data network and the user plane function in the 5G core network are connected through the N6 reference point (Reference Point), the V2X application server is connected with the V2X application in the user equipment through the V1 reference point; the wireless access network is connected with the 5G core network The AMF function and UPF function in the connection, the wireless access network is connected to the user equipment 1 and the user equipment 5 through the Uu reference point; multiple user equipment is directly connected through the PC5 reference point, and multiple V2X applications pass through V5 reference point connection. The aforementioned reference point may also be referred to as an "interface".

In the New Radio (NR) V2X discussion, RAN1 decided to support the use of a physical layer hybrid automatic repeat reQuest (Hybrid Automatic Repeat reQuest, HARQ) retransmission mechanism for unicast and multicast services of direct communication. At the same time, in order to reduce interference, for unicast data communication, transmission power control is supported based on the path loss from the user equipment at the transmitting end to the user equipment at the receiving end. In the transmission power control process, the receiving end user equipment is supported to report the SL-RSRP report to the sending end user equipment, and the sending end user equipment performs path loss estimation based on the SL-RSRP report, and then adjusts the transmission according to the estimation result of the path loss estimation power.

Among them, SL-RSRP is the long-term measurement result of the user equipment at the receiving end after being filtered by a higher layer (layer 3). Exemplarily, the user equipment at the receiving end measures the reference signal sent by the user equipment at the transmitting end at a certain time interval, and the reference signal may be a demodulation reference signal or a demodulation reference signal. For the measurement results of the physical layer, before being used to evaluate report standards or measurement reports, the upper layer in the user equipment at the receiving end uses the following formula to filter the measurement results:

F _n =(1-a)*F _n-1 +a*M _n ;

Among them, M _n is the most recent physical layer measurement result, F _n-1 is the filter measurement result before the update, F _n is the filter measurement result after the update, a=1/2 ^(ki/4) , and k _i is the configuration value.

In addition, in NR uplink communication, the path loss estimation method in the uplink transmit power control of the user equipment is:

PL=referenceSignalPower--higher layer filtered RSRP

Among them, referenceSignalPower is the transmit power of the downlink reference signal sent by the base station to the user equipment, and the transmit power is usually kept constant; higher layer filtered RSRP is the received power of the downlink reference signal measured by the user equipment.

According to the above formula, the SL-RSRP report is a long-term measurement result. The SL-RSRP value is a weighted average of multiple measurement results over a long period of time. In the uplink transmission power control process between the user equipment of NR uplink communication and the base station, the transmission power of the base station when transmitting the downlink reference signal remains unchanged. In the unicast scenario of direct communication, the transmit power of the user equipment at the transmitting end is continuously adjusted according to the path loss estimation. If the transmit power of the transmitter corresponding to the multiple measured values measured by the user equipment at the receiving end is inconsistent, it is difficult to perform a correct path loss estimation based on the SL-RSRP value, which affects the effect of power control for direct communication.

Fig. 2 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure. The method may be executed by the first UE in V2X (such as UE1 in FIG. 1), and the method includes:

Step 201: The first UE sends the i-th SL-RSRP report to the second UE, and the i-th SL-RSRP report is used for the second UE to perform transmit power control.

The first UE is user equipment at the receiving end, and the second UE is user equipment at the transmitting end.

The second UE periodically sends a reference signal to the first UE. The reference signal may be a demodulation reference signal (Demodulation Reference Signal, DMRS); or, the reference signal may be a channel state information reference signal (Channel State Information-Reference Signal). , CSI-RS).

The SL-RSRP report carries the SL-RSRP measured by the first UE. The SL-RSRP is the SL-RSRP after the higher layer (layer 3) in the first UE performs the higher layer filtering (L3 filter).

Optionally, the first UE periodically sends an SL-RSRP report to the second UE. The i-th SL-RSRP report may be any one of multiple SL-RSRP reports periodically reported, and i is an integer. After the second UE receives the i-th SL-RSRP report, the i-th transmit power control can be performed.

Optionally, after the second UE receives the i-th SL-RSRP report, it is based on the transmission power of the latest reference signal (for example, the adjusted transmission power according to the i-1th SL-RSRP report) and the i-th SL-RSRP report. -Calculate the path loss based on the received power in the RSRP report, and then perform transmit power control based on the path loss.

Step 202: The first UE restarts the high-level filtering of the SL-RSRP after sending the i-th SL-RSRP report after the duration of T.

After the first UE sends the i-th SL-RSRP report for the duration of T, the first UE considers that the i-th transmit power control of the second UE has been adjusted, and restarts the high-level filtering of the SL-RSRP. That is, T is greater than the time required for the second UE to adjust the transmission power according to the i-th SL-RSRP report.

Exemplarily, the second UE adjusts the transmission power only once according to the i-th SL-RSRP before receiving the i+1-th RSRP report.

"Restarting the high-level filtering of SL-RSRP" refers to clearing the historical filtering measurement results and restarting a new round of high-level filtering of SL-RSRP.

Step 203: The first UE sends an i+1 th RSRP report to the second UE, and the i+1 th SL-RSRP report is used for the second UE to perform transmit power control.

After the high-level filtering of the SL-RSRP, the first UE monitors the SL-RSRP for a period of time, and then waits for the next wave-up opportunity, the first UE sends the i+1th RSRP report to the second UE. Wherein, the i+1th SL-RSRP report is used for the second UE to perform the i+1th transmit power control.

Optionally, after the second UE receives the i+1th SL-RSRP report, it is based on the transmission power of the latest reference signal (for example, the adjusted transmission power according to the i-th SL-RSRP report) and the i+1th SL-RSRP report. The received power in the SL-RSRP report is used to calculate the path loss, and then the transmission power control is performed according to the path loss.

Exemplarily, the foregoing steps 201 to 203 may be periodically performed multiple times.

In summary, the method provided in this embodiment restarts the high-level filtering of SL-RSRP after sending the i-th SL-RSRP report, and the i-th SL-RSRP report is used for the second UE to perform the i-th time The transmission power adjustment of the first UE through the high-level filtering of the restarted SL-RSRP performs long-term monitoring of the new transmission power of the second UE after the i-th adjustment to obtain the i+1th SL-RSRP report , The i+1th SL-RSRP report is used for the second UE to perform the i+1th transmit power adjustment, so that the second UE can obtain a more accurate SL-RSRP report for the transmit power adjusted each time , To improve the accuracy of the transmission power control of the transmitting end user equipment during the IoV communication, thereby reducing the interference between various user equipment during IoV communication.

Fig. 3 shows a flow chart of a method for controlling transmit power of direct communication provided by an exemplary embodiment of the present disclosure. This method may be executed by a second UE in V2X (such as UE2 in FIG. 1), and the method includes:

Step 301: The second UE receives the i-th SL-RSRP report sent by the first UE;

The second UE periodically sends a reference signal to the first UE. The reference signal may be a Demodulation Reference Signal (DMRS); or, the reference signal may be a Channel State Information-Reference Signal (Channel State Information-Reference Signal). , CSI-RS).

Optionally, the first UE periodically sends an SL-RSRP report to the second UE. The i-th SL-RSRP report may be any one of multiple SL-RSRP reports periodically reported, and i is an integer. After the second UE receives the i-th SL-RSRP report, it can perform the i-th transmit power control.

Step 302: The second UE performs transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report;

After the second UE receives the i-th SL-RSRP report, according to the transmit power of the latest reference signal (for example, the adjusted transmit power according to the i-1th SL-RSRP report) and the i-th SL-RSRP report Calculate the path loss based on the received power of, and then perform the i-th transmit power control based on the path loss.

The i-th SL-RSRP report is generated after the first UE restarts the high-level filtering of the SL-RSRP after sending the i-1th SL-RSRP report for T duration.

Wherein, the IoV communication between the first UE and the second UE may be unicast communication of direct communication, or multicast communication.

Fig. 4 is a flowchart of a transmission power control method for direct communication provided according to an exemplary embodiment of the present disclosure. The method may be executed by the first UE and the second UE in V2X (such as UE1 and UE2 in FIG. 1), and the method includes:

Step 401: The second UE uses the i-th transmit power to transmit a reference signal to the first UE.

The second UE uses the i-th transmit power to periodically send a reference signal to the first UE. The reference signal may be a DMRS or a CSI-RS.

When i is 0, the transmission power may be predefined by the communication protocol, or pre-configured by the access network device, or a default value in the second UE. When i is greater than 0, the i-th transmit power may be adjusted by the second UE according to the latest SL-RSRP report.

Step 402: The first UE measures the received power of the reference signal sent by the second UE, and obtains the i-th SL-RSRP report by using high-layer filtering;

The first UE measures the reference signal sent by the second UE, and obtains the latest reference signal received power (that is, the physical layer measurement result). Use high-level filtering to obtain the i-th SL-RSRP report.

Exemplarily, the upper layer in the first UE uses the following formula to filter the measurement results:

F _n =(1-a)*F _n-1 +a*M _n ;

Step 403: The first UE sends the i-th SL-RSRP report to the second UE.

Step 404: The first UE restarts the high-level filtering of the SL-RSRP after sending the i-th SL-RSRP report after the duration of T.

In an example, the first UE starts a timer after sending the i-th SL-RSRP report. The timing duration of this timer is T. When the timer expires, the high-level filtering of SL-RSRP is restarted, as shown in Figure 5.

Exemplarily, the first UE restarting the high-level filtering of SL-RSRP includes:

1. Initialize F _n-1 to 0;

2. Initialize F _n as M _n , and M _n is the most recent physical layer measurement result;

3. Restart the high-level filtering of SL-RSRP according to the following formula:

F _n =(1-a)*F _n-1 +a*M _n ;

Among them, F _n-1 is the filtered measurement result before the update, F _n is the filtered measurement result after the update, and a is the configuration parameter. Exemplarily, a=1/2 ^(ki/4) , and k _i is the configuration value.

Optionally, T is greater than the time required for the second UE to adjust the transmission power according to the i-th SL-RSRP report. T is a fixed value or a pre-configured value.

Optionally, before this step, the first UE also receives downlink configuration signaling sent by the access network device; T is determined according to the downlink configuration signaling.

Step 405: After receiving the i-th SL-RSRP report, the second UE performs transmit power control according to the i-th SL-RSRP report;

The second UE performs transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report.

The second UE obtains the i-th SL-RSRP according to the i-th SL-RSRP report.

The second UE calculates the power difference between the i-th transmission power and the i-th SL-RSRP, that is, the path loss. The second UE adjusts the transmission power according to the path loss to obtain the i+1th transmission power.

Step 406: The second UE sends the reference signal to the first UE by using the i+1th transmit power.

The second UE periodically sends a reference signal to the first UE using the i+1th transmission power, and the reference signal may be a DMRS or a CSI-RS.

Step 407: The first UE measures the received power of the reference signal sent by the second UE, and obtains the i+1th SL-RSRP report by using high-layer filtering;

The first UE measures the reference signal sent by the second UE, and obtains the latest reference signal received power (that is, the physical layer measurement result). The i+1th SL-RSRP report is obtained by the high-level filtering after the restart.

F _n =(1-a)*F _n-1 +a*M _n ;

Step 408: The first UE sends the i+1th SL-RSRP report to the second UE;

Step 409: The first UE restarts the high-level filtering of the SL-RSRP after sending the i+1th SL-RSRP report after T duration;

In an example, the first UE starts the timer after sending the i+1th SL-RSRP report. The timing duration of this timer is T. When the timer expires, the high-level filtering of SL-RSRP is restarted, as shown in Figure 5.

1. Initialize F _n-1 to 0;

F _n =(1-a)*F _n-1 +a*M _n ;

Optionally, T is greater than the time required for the second UE to adjust the transmission power according to the i+1th SL-RSRP report. T is a fixed value or a pre-configured value.

Optionally, before this step, the first UE also receives downlink configuration signaling sent by the access network device; and determines T according to the downlink configuration signaling.

Step 410: After receiving the i+1th SL-RSRP report, the second UE performs transmit power control according to the i+1th SL-RSRP report.

The second UE performs transmit power control according to the (i+1)th SL-RSRP report within T time period after receiving the (i+1)th SL-RSRP report.

The second UE obtains the (i+1)th SL-RSRP from the (i+1)th SL-RSRP report.

The second UE calculates the power difference between the i+1th transmission power and the i+1th SL-RSRP, that is, the path loss. The second UE adjusts the transmission power according to the path loss to obtain the i+2th transmission power.

The steps performed by the first UE in the above-mentioned embodiments can be separately implemented as the transmit power control method for the direct communication on the first UE side; the steps performed by the second UE can be separately implemented as the direct communication on the second UE side. The transmission power control method.

Fig. 6 shows a flowchart of a method for controlling transmit power of direct communication provided by another exemplary embodiment of the present disclosure. The method may be executed by the first UE and the second UE in V2X (such as UE1 and UE2 in FIG. 1), and the method includes:

Step 601: The second UE sends a reference signal to the first UE;

Step 602: The first UE measures the received power of the reference signal sent by the second UE, and generates an SL-RSRP report without high-layer filtering;

In an example, "SL-RSRP report without high-level filtering" refers to high-level filtering achieved by setting a in the above formula to 1, which essentially does not use high-level filtering.

Step 603: The first UE sends an SL-RSRP report to the second UE, where the SL-RSRP report is used for the second UE to perform transmit power control;

Step 604: The second UE receives the SL-RSRP report reported by the first UE, and the SL-RSRP in the SL-RSRP report is the SL-RSRP that has not been filtered by a higher layer;

Step 605: The second UE performs transmit power control according to the SL-RSRP report.

In summary, in the method provided in this embodiment, the first UE sends the SL-RSRP report without high-layer filtering to the second UE, so that the second UE can obtain a more accurate SL-RSRP report for each adjusted transmit power. -RSRP report to improve the accuracy of the transmission power control of the transmitting end user equipment during the IoV communication, thereby reducing the interference between various user equipment during IoV communication.

The following are device embodiments of the embodiments of the present disclosure. For details that are not described in detail in the device embodiments, reference may be made to the corresponding method embodiments above, and this disclosure will not repeat them one by one.

Fig. 7 is a block diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure. The device can be implemented as all or a part of the first UE through software, hardware or a combination of both. The device includes:

The sending module 720 is configured to send an i-th SL-RSRP report to the second UE, where the i-th SL-RSRP report is used for the second UE to perform transmit power control, and i is an integer;

The restarting module 740 is configured to restart the high-level filtering of the SL-RSRP after sending the i-th SL-RSRP report after T duration;

The sending module 720 is configured to send an i+1th RSRP report to the second UE, and the i+1th SL-RSRP report is used for the second UE to perform transmit power control.

In an optional embodiment, the restart module 740 is configured to initialize F _n-1 to 0; initialize F _n to M _n , and M _{n to} be the most recent physical layer measurement result; restart the process according to the following formula The high-level filtering of the SL-RSRP:

F _n =(1-a)*F _n-1 +a*M _n ;

In an optional embodiment, a=1/2 ^(ki/4) , and ki is a configuration value.

In an optional embodiment, the T is greater than the time required for the second UE to adjust the transmission power according to the i-th SL-RSRP report.

In an optional embodiment, the T is: a fixed value; or, a pre-configured value.

In an optional embodiment, the device further includes:

The receiving module 760 is configured to receive downlink configuration signaling sent by the access network device;

The restart module 740 is configured to determine the T according to the downlink configuration signaling.

In summary, the device provided in this embodiment restarts the high-level filtering of SL-RSRP after sending the i-th SL-RSRP report, and the i-th SL-RSRP report is used for the second UE to perform the i-th time The transmission power adjustment of the first UE through the high-level filtering of the restarted SL-RSRP performs long-term monitoring of the new transmission power of the second UE after the i-th adjustment to obtain the i+1th SL-RSRP report , The i+1th SL-RSRP report is used for the second UE to perform the i+1th transmit power adjustment, so that the second UE can obtain a more accurate SL-RSRP report for the transmit power adjusted each time , To improve the accuracy of the transmission power control of the transmitting end user equipment during the IoV communication, thereby reducing the interference between various user equipment during IoV communication.

Fig. 8 is a block diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure. The device can be implemented as all or part of the second UE through software, hardware or a combination of both. The device includes:

The receiving module 820 is configured to receive the i-th SL-RSRP report sent by the first UE;

The adjustment module 840 is configured to perform transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report;

In an optional embodiment, the adjustment module 840 is configured to obtain the i-th transmit power of the reference signal, and the i-th transmit power is before receiving the i-th SL-RSRP report The power used when transmitting the reference signal; the received power of the reference signal is obtained according to the i-th SL-RSRP report; the path loss is calculated according to the difference between the i-th transmission power and the received power ; Calculate the i+1th transmit power according to the path loss.

In an optional embodiment, the adjustment module 840 is configured to maintain the i+1th transmission power before receiving the i+1th SL-RSRP report.

Fig. 9 is a block diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure. The device can be implemented as all or a part of the first UE through software, hardware or a combination of both. The device includes:

The measuring module 920 is configured to measure the received power of the reference signal sent by the second UE, and generate an SL-RSRP report that has not been filtered by a higher layer;

The sending module 940 is configured to send the SL-RSRP report to the second UE, where the SL-RSRP report is used for the second UE to perform transmit power control.

Fig. 10 is a block diagram of a transmission power control device for direct communication provided by an exemplary embodiment of the present disclosure. The device can be implemented as all or part of the second UE through software, hardware or a combination of both. The device includes:

The sending module 1020 is configured to send a reference signal to the first UE;

The receiving module 1040 is configured to receive the SL-RSRP report reported by the first UE, where the SL-RSRP in the SL-RSRP report is the SL-RSRP without high-layer filtering;

The sending module 1020 is configured to perform transmission power control according to the SL-RSRP report.

In summary, the device provided in this embodiment sends the SL-RSRP report without high-layer filtering to the second UE through the first UE, so that the second UE can obtain a more accurate SL-RSRP report for each adjusted transmit power. -RSRP report to improve the accuracy of the transmission power control of the transmitting end user equipment during the IoV communication, thereby reducing the interference between various user equipment during IoV communication.

FIG. 11 shows a schematic structural diagram of a user equipment (or V2X sending device or V2X receiving device) provided by an exemplary embodiment of the present disclosure. The user equipment includes: a processor 1101, a receiver 1102, a transmitter 1103, and a memory 1104 And bus 1105.

The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and information processing by running software programs and modules.

The receiver 1102 and the transmitter 1103 may be implemented as a communication component, and the communication component may be a communication chip.

The memory 1104 is connected to the processor 1101 through the bus 1105.

The memory 1104 may be used to store at least one instruction, and the processor 1101 is used to execute the at least one instruction, so as to implement each step in the foregoing method embodiment.

In addition, the memory 1104 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .

In an exemplary embodiment, there is also provided a non-transitory computer-readable storage medium including instructions, such as a memory including instructions, which may be executed by a processor of a user equipment to complete the transmission power control method of the direct communication. . For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.

A non-transitory computer-readable storage medium. When the instructions in the non-transitory computer storage medium are executed by a processor of a user equipment, the user equipment can execute the above-mentioned direct communication transmission power control method.

An exemplary embodiment of the present disclosure further provides a communication system, which includes: the above-mentioned V2X sending device and the above-mentioned V2X receiving device.

An exemplary embodiment of the present disclosure also provides a computer-readable storage medium in which at least one instruction, at least one program, code set or instruction set is stored, the at least one instruction, the At least one program, the code set, or the instruction set is loaded and executed by the processor to implement the transmission power control method for direct communication provided by the foregoing method embodiments.

Those of ordinary skill in the art can understand that all or part of the steps in the foregoing embodiments can be implemented by hardware, or by a program instructing relevant hardware to be completed. The program can be stored in a computer-readable storage medium. The storage medium mentioned can be a read-only memory, a magnetic disk or an optical disk, etc.

The above descriptions are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection of the present disclosure. Within range.

Claims

A transmission power control method for direct communication, characterized in that it is applied to a first user equipment UE in a V2X network of vehicles, and the method includes:

The first UE sends the i-th direct communication reference signal received power SL-RSRP report to the second UE, the i-th SL-RSRP report is used for the second UE to perform transmit power control, and i is an integer ；

The first UE restarts the high-layer filtering of the SL-RSRP after sending the i-th SL-RSRP report after the duration of T;

The first UE sends an i+1 th SL-RSRP report to the second UE, and the i+1 th SL-RSRP report is used for the second UE to perform transmit power control.
The method according to claim 1, wherein said restarting the high-level filtering of SL-RSRP comprises:

Initialize F n-1 to 0;

Initialize F n as M n , and M n is the most recent physical layer measurement result;

Restart the high-level filtering of the SL-RSRP according to the following formula:

F n =(1-a)*F n-1 +a*M n ;

Wherein, the F n-1 is the filtered measurement result before the update, the F n is the filtered measurement result after the update, and a is a configuration parameter.
The method according to claim 2, wherein a=1/2 (ki/4) , and ki is a configuration value.
The method according to any one of claims 1 to 3, wherein the T is greater than the time required for the second UE to adjust the transmission power according to the i-th SL-RSRP report.
The method according to any one of claims 1 to 3, wherein the T is:

Fixed value;

or,

Pre-configured value.
The method according to any one of claims 1 to 3, wherein the method further comprises:

Receive downlink configuration signaling sent by access network equipment;

Determine the T according to the downlink configuration signaling.
A transmission power control method for direct communication, characterized in that it is applied to a second user equipment UE in a V2X network of vehicles, and the method includes:

Receiving, by the second UE, the i-th direct communication reference signal received power SL-RSRP report sent by the first UE;

After receiving the i-th SL-RSRP report, the second UE performs transmit power control according to the i-th SL-RSRP report;

Wherein, the i-th SL-RSRP report is generated after the first UE restarts the high-level filtering of SL-RSRP after sending the i-1th SL-RSRP report for T duration, i is Integer.
The method according to claim 7, wherein the performing transmit power control according to the i-th SL-RSRP report comprises:

Acquiring the i-th transmit power of the reference signal, where the i-th transmit power is the power used when transmitting the reference signal before receiving the i-th SL-RSRP report;

Acquiring the received power of the reference signal according to the i-th SL-RSRP report;

Calculate the path loss according to the difference between the i-th transmit power and the received power;

Calculate the i+1th transmit power according to the path loss.
A transmission power control device for direct communication, characterized in that the device includes:

A sending module configured to send an i-th SL-RSRP report to the second UE, where the i-th SL-RSRP report is used for the second UE to perform transmit power control, and i is an integer;

The restarting module is configured to restart the high-level filtering of the SL-RSRP after sending the i-th SL-RSRP report after T duration;

The sending module is configured to send an i+1th RSRP report to the second UE, and the i+1th SL-RSRP report is used for the second UE to perform transmit power control.
The device according to claim 9, wherein:

The restart module is configured to initialize F n-1 to 0; initialize F n to M n , and M n to be the most recent physical layer measurement result; restart the high-level filtering of the SL-RSRP according to the following formula:

F n =(1-a)*F n-1 +a*M n ;

Wherein, the F n-1 is the filtered measurement result before the update, the F n is the filtered measurement result after the update, and a is a configuration parameter.
The apparatus according to claim 9, wherein a=1/2 (ki/4) , and ki is a configuration value.
The apparatus according to any one of claims 9 to 11, wherein the T is greater than the time required for the second UE to adjust the transmission power according to the i-th SL-RSRP report.
The device according to any one of claims 9 to 11, wherein the T is:

Fixed value;

or,

Pre-configured value.
The device according to any one of claims 9 to 11, wherein the device further comprises:

The receiving module is configured to receive downlink configuration signaling sent by the access network device;

The restart module is configured to determine the T according to the downlink configuration signaling.
A transmission power control device for direct communication, characterized in that the device includes:

A receiving module configured to receive the i-th SL-RSRP report sent by the first UE;

An adjustment module, configured to perform transmit power control according to the i-th SL-RSRP report within T time period after receiving the i-th SL-RSRP report;

Wherein, the i-th SL-RSRP report is generated after the first UE restarts the high-layer filtering of the SL-RSRP after the length of T after sending the i-1th SL-RSRP report.
The device according to claim 15, wherein:

The adjustment module is configured to obtain the i-th transmission power of the reference signal, where the i-th transmission power is the power used when transmitting the reference signal before receiving the i-th SL-RSRP report; Obtain the received power of the reference signal according to the i-th SL-RSRP report; calculate the path loss according to the difference between the i-th transmitted power and the received power; calculate the i+th according to the path loss Transmission power for 1 time.
A vehicle networking V2X receiving device, characterized in that, the device includes:

processor;

A transceiver connected to the processor;

Wherein, the processor is configured to load and execute executable instructions to implement the transmission power control method for direct communication according to any one of claims 1 to 6.
A vehicle networking V2X sending device is characterized in that the device includes:

processor;

A transceiver connected to the processor;

Wherein, the processor is configured to load and execute executable instructions to implement the transmission power control method for direct communication according to any one of claims 7 to 8.
A computer-readable storage medium storing at least one instruction, at least one program, code set or instruction set, the at least one instruction, the at least one program, the code set or the The instruction set is loaded and executed by the processor to realize the transmission power control method of direct communication according to any one of claims 1 to 8.