CN112020131B

CN112020131B - Transmission power determining method, information transmission method and communication equipment

Info

Publication number: CN112020131B
Application number: CN201910472284.7A
Authority: CN
Inventors: 任晓涛; 赵锐
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2022-04-01
Anticipated expiration: 2039-05-31
Also published as: WO2020239023A1; CN112020131A

Abstract

The invention provides a transmission power determination method, an information transmission method and communication equipment, and solves the problem that a related scheme for calculating the path loss of a direct communication link is not provided in the prior art. The invention comprises the following steps: acquiring first transmission power related information of a first reference signal sent by second communication equipment; determining a through link path loss according to the first transmission power related information, wherein the through link path loss is the path loss of a through link between the first communication device and the second communication device or the third communication device which sends the first reference signal; and determining the through link transmitting power of the first communication equipment according to the through link path loss. The embodiment of the invention can reduce the interference in the through link communication and simultaneously reduce the power consumption of the transmitting end.

Description

Transmission power determining method, information transmission method and communication equipment

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a transmission power determining method, an information transmission method, and a communications device.

Background

In the prior art, when a terminal performs a Sidelink communication on a direct link, in order to ensure the communication quality of the Sidelink communication link and reduce the interference of the Sidelink communication link to an uplink air interface communication link, the transmission power of the terminal cannot be too small or too large, which requires to control the transmission power of the terminal. In the prior art, the transmission power of the Sidelink communication is determined by taking the minimum value of the path loss of the Sidelink communication link and the path loss of the uplink air interface communication link as the comprehensive path loss and then performing partial compensation according to the comprehensive path loss. The path loss of the uplink air-interface communication link can be obtained through uplink reference signal measurement, but a related scheme how to calculate the path loss of the direct communication link is not given in the prior art.

Disclosure of Invention

The invention aims to provide a transmission power determining method, an information transmission method and communication equipment, which are used for solving the problem that a related scheme for calculating the path loss of a direct communication link is not provided in the prior art.

In order to achieve the above object, the present invention provides a transmission power determining method applied to a first communication device, the method including:

acquiring first transmission power related information of a first reference signal sent by second communication equipment;

determining a through link path loss according to the first transmission power related information, wherein the through link path loss is the path loss of a through link between the first communication device and the second communication device or the third communication device which sends the first reference signal;

and determining the through link transmitting power of the first communication equipment according to the through link path loss.

Wherein, before determining the through link path loss according to the first transmit power related information, the method further comprises:

and receiving a first reference signal sent by the second communication device or the third communication device.

Wherein the determining the through link path loss according to the first transmit power related information comprises:

and determining the path loss of the through link according to the received power of the first reference signal and the first transmission power related information.

Wherein the first transmission power related information is transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal.

Wherein the correlation factor of the first reference signal transmit power is a through link path loss compensation factor.

The first transmission power related information is the transmission power of a first reference signal, and the number of the acquired first reference signals is one;

the determining the through link path loss according to the received power of the first reference signal and the first transmit power related information includes:

determining the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

representing the transmission power, RSRP, of the first reference signal_SLRepresents a received power of the first reference signal.

The first transmission power related information is transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

representing the transmission power, RSRP, of the ith first reference signal_SLiDenotes the received power, PL, of the ith first reference signal_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

Wherein the determining the through link transmit power of the first communication device according to the through link path loss comprises:

determining a through-link transmit power of the first communication device by the following equation;

PL＝min(a*PL_SL，b*PL_UL)；P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

wherein PL denotes the integrated path loss, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀And representing the corresponding received power when the through link reaches the preset communication quality, wherein a represents a first path loss compensation factor, b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

The first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is more than 0 and less than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

wherein, P_maxRepresenting the maximum transmit power, RSRP, of the first communication device_SLRepresents the received power, PL, of the first reference signal_SLRepresenting the through link path loss.

The first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is more than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

P_maxrepresenting the maximum transmit power, RSRP, of the first communication device_SLRepresents the received power, PL, of the first reference signal_SLRepresenting the through link path loss.

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

wherein PL denotes the integrated path loss, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀And b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

The first transmission power related information is a correlation factor of the transmission power of the first reference signals, and the number of the acquired first reference signals is at least two;

determining the path loss of the through link according to the transmission power related information comprises:

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiDenotes the received power, P, of the ith first reference signal_maxRepresenting the most of the first communication deviceHigh transmission power, h_iA correlation factor representing the transmission power of the ith first reference signal, 0 < h_i≤1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiTo representReceived power of ith first reference signal, P_maxRepresenting the maximum transmit power, h, of the first communication device_iA correlation factor, h, representing the transmission power of the ith first reference signal_i≥1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Wherein the first reference signal comprises at least one of:

the system comprises a direct link primary synchronization signal S-PSS, a direct link secondary synchronization signal S-SSS, a physical direct link broadcast channel PSBCH, a demodulation reference signal DMRS, a channel state information reference signal CSI-RS, a phase tracking reference signal PT-RS, a physical direct link control channel PSCCH, a physical direct link shared channel PSSCH, a physical direct link feedback channel PSFCH, a preset reference signal and a preset physical channel.

In order to achieve the above object, an embodiment of the present invention further provides an information transmission method applied to a second communication device, where the method includes:

transmitting first transmit power related information of a first reference signal to a first communication device, the first transmit power related information being used for the first communication device to determine a through link path loss.

The information transmission method further includes:

and sending a first reference signal to the first communication equipment under the condition that the second communication equipment is terminal equipment.

Wherein the sending first transmission power information of the first reference signal to the first communication device comprises:

and under the condition that the second communication equipment is the terminal equipment, sending the first transmission power related information on a physical direct link control channel (PSCCH) of a direct link through direct link control information (SCI), or sending the first transmission power related information on the direct link through Radio Resource Control (RRC) signaling, or sending the first transmission power related information on a PSBCH of the direct link through a direct link master information block (SL-MIB).

Wherein the sending the first transmission power related information of the first reference signal to the first communication device comprises:

and in the case that the second communication device is a base station device, sending the first transmission power related information on a PDCCH of the downlink air interface link through downlink control information DCI, or sending the first transmission power related information on a physical broadcast channel PBCH of the downlink air interface link through a master information block MIB, or sending the first transmission power related information on the downlink air interface link through RRC signaling.

In order to achieve the above object, an embodiment of the present invention further provides a communication device, where the communication device is a first communication device, and the communication device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

Wherein, before determining the path loss of the through link according to the first transmission power related information, the processor is further configured to perform the following steps:

receiving, by a transceiver, a first reference signal transmitted by the second communication device or the third communication device.

Wherein the processor determining the path loss of the through link according to the first transmission power related information comprises:

the processor performing the step of determining the through link path loss according to the received power of the first reference signal and the first transmit power related information comprises:

determining the through link path loss by the following formula;

wherein PL_SLMeans for indicating straightThe path loss of the through link is reduced,

determining the through link path loss by the following formula;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

Wherein the processor performing the step of determining the through-link transmit power of the first communication device based on the through-link path loss comprises:

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

the processor executing the step of determining the path loss of the through link according to the transmission power related information comprises:

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiDenotes the received power, P, of the ith first reference signal_maxRepresenting the maximum transmit power, h, of the first communication device_iA correlation factor representing the transmission power of the ith first reference signal, 0 < h_i≤1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiDenotes the received power, P, of the ith first reference signal_maxRepresenting the maximum transmit power, h, of the first communication device_iA correlation factor, h, representing the transmission power of the ith first reference signal_i≥1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is more than or equal to 2, andi and N are both positive integers.

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Wherein the first reference signal comprises at least one of:

In order to achieve the above object, an embodiment of the present invention also provides a computer-readable storage medium on which a computer program is stored, which, when executed by a processor, implements the steps of the transmission power determination method as described above.

In order to achieve the above object, an embodiment of the present invention further provides a communication device, where the communication device is a second communication device, and the communication device includes: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, the processor implementing the steps when executing the program of:

controlling a transceiver to send first transmit power related information of a first reference signal to a first communication device, the first transmit power related information being used for the first communication device to determine a through link path loss.

Wherein the processor is further configured to perform the steps of:

Wherein the processor performing the step of transmitting the first transmission power information of the first reference signal to the first communication device comprises:

Wherein the processor performing the step of transmitting the first transmission power related information of the first reference signal to the first communication device comprises:

In order to achieve the above object, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored, the computer program, when executed by a processor, implementing the steps of the information transmission method as described above.

In order to achieve the above object, an embodiment of the present invention further provides a communication device, where the communication device is a first communication device, and the communication device includes:

a first obtaining module, configured to obtain first transmission power related information of a first reference signal sent by a second communication device;

a first determining module, configured to determine a path loss of a direct link according to the first transmission power related information, where the path loss of the direct link is a path loss of the direct link between the first communication device and the second communication device or the third communication device that sends the first reference signal;

a second determining module, configured to determine a through link transmit power of the first communication device according to the through link path loss.

Wherein, above-mentioned communications facilities still includes:

a receiving module, configured to receive, according to the first transmission power related information, a first reference signal sent by the second communication device or the third communication device before determining a path loss of a through link.

Wherein the first determining module is configured to determine the through link path loss according to the received power of the first reference signal and the first transmit power related information.

a first sending module, configured to send first transmission power related information of a first reference signal to a first communication device, where the first transmission power related information is used by the first communication device to determine a through link path loss.

Wherein, above-mentioned communications facilities still includes:

a second sending module, configured to send a first reference signal to the first communication device when the second communication device is a terminal device.

The first sending module is configured to send the first transmit power related information through direct link control information SCI on a physical direct link control channel PSCCH of a direct link, or send the first transmit power related information through radio resource control RRC signaling on the direct link, or send the first transmit power related information through a direct link master information block SL-MIB on a PSBCH of the direct link, when the second communication device is a terminal device.

The first sending module is configured to send the first transmit power related information through downlink control information DCI on a PDCCH of a downlink air interface link, or send the first transmit power related information through a master information block MIB on a physical broadcast channel PBCH of the downlink air interface link, or send the first transmit power related information through RRC signaling on the downlink air interface link, when the second communication device is a base station device.

The embodiment of the invention has the following beneficial effects:

according to the technical scheme of the embodiment of the invention, first transmission power related information of a first reference signal sent by second communication equipment is obtained; determining a through link path loss according to the first transmission power related information, wherein the through link path loss is the path loss of a through link between the first communication device and the second communication device or the third communication device which sends the first reference signal; and determining the through link transmitting power of the first communication equipment according to the through link path loss, so that the interference in through link communication can be reduced, and the power consumption of a transmitting end can be reduced.

Drawings

Fig. 1 is a schematic flow chart of a transmission power determining method according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a first communication between a first communication device and a second communication device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of second communication between a first communication device and a second communication device according to an embodiment of the present invention;

fig. 4 is a third schematic communication diagram of the first communication device and the second communication device in the embodiment of the present invention;

fig. 5 is a fourth communication diagram of a first communication device and a second communication device in the embodiment of the present invention;

FIG. 6 is a flowchart illustrating an information transmission method according to an embodiment of the present invention;

fig. 7 is a block diagram of a first communication device or a second communication device according to an embodiment of the present invention;

fig. 8 is a block diagram of a first communication device according to an embodiment of the present invention;

fig. 9 is a block diagram of a second communication device according to an embodiment of the present invention;

fig. 10 is a block diagram of a second communication device according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. In the description and in the claims "and/or" means at least one of the connected objects.

The following description provides examples and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various examples may omit, substitute, or add various procedures or components as appropriate. For example, the described methods may be performed in an order different than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

As shown in fig. 1, an embodiment of the present invention provides a transmission power determining method, which is applied to a first communication device, where the first communication device may specifically be a terminal device, and the method includes:

step 101: first transmission power related information of a first reference signal sent by a second communication device is obtained.

The second communication device may be a terminal device or a base station device. The first transmission power related information is the transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal, and the correlation factor of the transmission power of the first reference signal is a through link path loss compensation factor. The number of the first reference signals is at least one.

When the first transmission power related information is the transmission power of the first reference signal, the first transmission power related information is quantized and encoded by at least a first preset bit, preferably, the first preset bit is 4 bits, and the quantized and encoded transmission power of the first reference signal by the first preset bit can ensure that the power information is relatively accurate and can also ensure relatively low signaling overhead.

When the first transmission power related information is a correlation factor of the transmission power of the first reference signal, the correlation factor may be a partial path loss compensation factor when the first communication device is assumed to transmit the first reference signal at maximum power, and the first transmission power related information is quantized and encoded with at least a second preset bit, preferably, the second preset bit is 2 bits, and the correlation factor of the transmission power of the first reference signal is encoded with the second preset bit, which may ensure both relatively accurate path loss compensation information and relatively low signaling overhead.

Each of the first reference signals includes at least one of:

The preset reference signal may be a reference signal other than S-PSS, S-SSS, DMRS, CSI-RS and PT-RS, and the preset physical channel may be a physical channel other than PSBCH, PSCCH, PSSCH and PSFCH.

Step 102: determining a through link path loss according to the first transmission power related information, where the through link path loss is a path loss of a through link between the first communication device and the second communication device or the third communication device that transmits the first reference signal.

Specifically, the through link path loss may be determined according to the received power of the first reference signal and the first transmit power related information.

Step 103: and determining the through link transmitting power of the first communication equipment according to the through link path loss.

Here, partial path compensation may be performed according to the path loss of the through link, so as to obtain the through link transmission power of the first communication device.

The method for determining the transmitting power of the embodiment of the invention comprises the steps of obtaining first transmitting power related information of a first reference signal sent by second communication equipment; determining a through link path loss according to the first transmission power related information, wherein the through link path loss is the path loss of a through link between the first communication device and the second communication device or the third communication device which sends the first reference signal; and determining the through link transmitting power of the first communication equipment according to the through link path loss, so that the interference in through link communication can be reduced, and the power consumption of a transmitting end can be reduced.

Further, before determining the path loss of the through link according to the first transmission power related information, the method further includes:

Here, the second communication device or the third communication device respectively includes at least one terminal device, and each of the terminal devices transmits one first reference signal.

Based on this, the determining the path loss of the through link according to the first transmission power related information includes:

Further, as a first optional implementation manner, the first transmission power related information is transmission power of a first reference signal, and the number of the acquired first reference signals is one;

determining the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

representing the transmission power, RSRP, of the first reference signal_SLRepresenting said first referenceThe received power of the signal.

Further, as a second optional implementation manner, the first transmission power related information is transmission power of a first reference signal, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

Based on the first optional implementation manner and the second optional implementation manner, the determining the through link transmission power of the first communication device according to the through link path loss includes:

wherein PL denotes the integrated path loss, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, and BW denotes the frequency band occupied by the transmission signal of the first communication deviceWidth, P₀And representing the corresponding received power when the through link reaches the preset communication quality, wherein a represents a first path loss compensation factor, b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

As a third optional implementation manner, the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, where h is greater than 0 and less than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

As a fourth optional implementation manner, the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is greater than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

Based on the third optional implementation manner and the fourth optional implementation manner, the determining, according to the path loss of the through link, the through link transmission power of the first communication device includes:

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

As a fifth optional implementation manner, the first transmission power related information is a correlation factor of transmission power of the first reference signal, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

Based on the fifth optional implementation manner, the determining the through link transmission power of the first communication device according to the through link path loss includes:

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

As a sixth optional implementation manner, the power related information is a correlation factor of the transmission power of the first reference signal, and the number of the acquired first reference signals is at least two;

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiDenotes the received power, P, of the ith first reference signal_maxRepresenting the maximum transmit power, h, of the first communication device_iA correlation factor, h, representing the transmission power of the ith first reference signal_i≥1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

Based on the above sixth optional implementation manner, the determining the through link transmission power of the first communication device according to the through link path loss includes:

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

The following describes the transmission power determination method according to the present invention with reference to specific embodiments.

Example 1: a unicast scenario.

As shown in fig. 2, a first terminal 21 (first communication device) and a second terminal 22 (second communication device) communicate through a direct link, the first terminal 21 is a transmitting terminal, the second terminal 22 is a receiving terminal, and the second terminal sends a first reference signal and a transmission power of the first reference signal to the first terminal.

The technical features of this embodiment:

the first transmission power related information comprises the transmission power P of the first reference signal_outAAnd the number of the acquired first reference signals is one. The first terminal receives the received power RSRP of the first reference signal_SLTransmitting power P with first reference signal_outADetermining the through link path loss PL_SL：

And the first terminal may be based on the calculated PL_SLAnd performing partial path loss compensation:

the meaning of each symbol in the formula of this embodiment has been explained in the above description, and is not described again here.

In the embodiment, the second communication device directly informs the transmission power of the reference signal, and the method is simple and intuitive.

Example two: a unicast scenario.

As shown in fig. 3, the third terminal 31 (first communication device) and the fourth terminal 32 (second communication device) communicate through a direct link, the third terminal 31 is a transmitting terminal, the fourth terminal 32 is a receiving terminal, and the fourth terminal sends the first reference signal and a part of the path loss compensation factor (correlation factor h of the transmission power of the first reference signal) to the third terminal.

Features of this embodiment: the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is greater than 0 and less than or equal to 1, and the number of the acquired first reference signals is one. The third terminal receives the power RSRP according to the first reference signal_SLAnd h, determining the straight-through link path loss PL_SL：

PL_SL＝h*(P_max-RSRP_SL)；

Here, h means a partial path loss compensation factor assuming that the third terminal transmits the first reference signal at maximum power.

Will be provided with

Substituting, the transmission power P of the third terminal, which can be represented by h_outA：

And the third terminal can perform partial path loss compensation according to h:

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

In this embodiment, the transmission power of the first reference signal is not notified, and only a part of the path loss compensation factor h is notified, thereby significantly reducing the signaling overhead.

Example three: a unicast scenario.

Features of this embodiment: the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is larger than or equal to 1, and the number of the acquired first reference signals is one. The third terminal receives the power RSRP according to the first reference signal_SLAnd h, determining the straight-through link path loss PL_SL：

PL_SL＝(P_max-RSRP_SL)/h；

Here, the meaning of h denotes a partial path loss compensation factor assuming that the third terminal transmits the reference signal at maximum power.

Will be provided with

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Example four: and (4) multicasting scenes.

As shown in fig. 4, the fifth terminal 41 communicates with the sixth terminal 42 through the through communication link 1, the fifth terminal 41 communicates with the seventh terminal 43 through the through communication link 2, and the fifth terminal 41 communicates with the eighth terminal 44 through the through communication link 3. The sixth, seventh and

eighth terminals

42, 43, 44 transmit the first reference signal and the first reference signal transmission power, respectively, to the fifth terminal 41. In the multicast scenario, the fifth terminal is a first communication device, and the sixth terminal, the seventh terminal and the eighth terminal are second communication devices.

Features of this embodiment: the power related information comprises transmission power, P, of a plurality of first reference signals from different devices_outA1，P_outA2，……，P_outAN. The fifth terminal receives the RSRP (received Power reference Signal) of a plurality of first reference signals from different devices_SL1，RSRP_SL2……，RSRP_SLNTransmission power with first reference signal, P_outA1，P_outA2，……，P_outANDetermining a plurality of through link path losses PL_SL1，PL_SL2，……，PL_SLN：

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

The fifth terminal may derive the calculated PL_SLAnd performing partial path loss compensation:

In the embodiment, the transmission power of the plurality of first reference signals of different devices is directly informed, and the method is simple and intuitive.

Example five: and (4) multicasting scenes.

As shown in fig. 5, the ninth terminal 51 communicates with the tenth terminal 52 through the through communication link 1, the ninth terminal 51 communicates with the eleventh terminal 53 through the through communication link 2, and the ninth terminal 51 communicates with the twelfth terminal 54 through the through communication link 3. The tenth, eleventh and

twelfth terminals

52, 53 and 54 transmit the first reference signal and h, respectively, to the fifth terminal 41. In the multicast scenario, the ninth terminal is a first communication device, and the tenth terminal, the eleventh terminal, and the twelfth terminal are second communication devices.

Features of this embodiment: the first transmission power related information comprises a correlation factor h of a plurality of first reference signal transmission powers from different devices₁，h₂，……，h_N，0＜h_i≦ 1, the ninth terminal receiving RSRP from multiple first reference signals from different devices_SL1，RSRP_SL2，……，RSRP_SLNCorrelation factor h with transmit power₁，h₂，……，h_NDetermining the path sub-loss PL of the through link_SLi：

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

The ninth terminal may perform partial path loss compensation according to h:

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

In this embodiment, the transmission power of the first reference signal is not notified, and only a plurality of partial path loss compensation factors h of different devices are notified, thereby significantly reducing signaling overhead.

Example six: and (4) multicasting scenes.

twelfth terminals

Features of this embodiment: the first transmission power related information comprises a correlation factor h of a plurality of first reference signal transmission powers from different devices₁，h₂，……，h_N，h_iThe ninth terminal receives the RSRP of a plurality of first reference signals from different devices_SL1，RSRP_SL2，……，RSRP_SLNCorrelation factor h with transmit power₁，h₂，……，h_NDetermining the path sub-loss PL of the through link_SLi：

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

The ninth terminal may perform partial path loss compensation according to h:

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Compared with the prior art, the transmission power determining method provided by the embodiment of the invention has the advantages that the transmitting end can determine the path loss of the through link according to the reference signal and the related power information sent by the receiving end, so that when only the receiving end sends the reference signal, the path loss of the through link can be determined according to the reference signal sent by the receiving end, and the transmission power of the through link of the transmitting end is further determined according to the path loss of the through link, so that the interference in through link communication is reduced, and the power consumption of the transmitting end is reduced.

As shown in fig. 6, an embodiment of the present invention further provides an information transmission method, which is applied to a second communication device, where the second communication device may be a terminal device or a base station device, and the method includes:

step 601: transmitting first transmit power related information of a first reference signal to a first communication device, the first transmit power related information being used for the first communication device to determine a through link path loss.

The first transmission power related information is the transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal, and the correlation factor of the transmission power of the first reference signal is a through link path loss compensation factor. The number of the first reference signals is at least one.

Each of the first reference signals includes at least one of:

According to the information transmission method, the first transmission power related information of the first reference signal is sent to the first communication equipment, so that the first communication equipment determines the path loss of the through link according to the first transmission power related information, and determines the transmission power of the through link of the first communication equipment according to the path loss of the through link, and therefore interference in through link communication can be reduced, and power consumption of a sending end is reduced.

Further, the information transmission method according to the embodiment of the present invention further includes:

Further, the sending the first transmission power information of the first reference signal to the first communication device includes:

in a case where the second communication device is a terminal device, the first transmit power related information is sent on a physical direct link control channel PSCCH of a direct link through direct link control information SCI, or the first transmit power related information is sent on the direct link through radio resource control RRC signaling, for example, the first transmit power related information is sent on the direct link through PC5RRC signaling, or the first transmit power related information is sent on a PSBCH of the direct link through a direct link master information block SL-MIB.

Further, the sending the first transmission power related information of the first reference signal to the first communication device includes:

and in the case that the second communication device is a base station device, sending the first transmission power related information on a PDCCH of the downlink air interface link through downlink control information DCI, or sending the first transmission power related information on a physical broadcast channel PBCH of the downlink air interface link through a master information block MIB, or sending the first transmission power related information on the downlink air interface link through RRC signaling, for example, transmitting the first transmission power related information on the downlink air interface link in a Uu RRC signaling manner.

As shown in fig. 7, an embodiment of the present invention further provides a communication device, where the communication device is specifically the first communication device, and since a principle of the communication device for solving the problem is similar to the method for determining the transmission power in the embodiment of the present invention, the implementation of the communication device may refer to the implementation of the method, and repeated details are omitted. The communication device includes: a transceiver, a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of:

acquiring first transmission power related information of a first reference signal transmitted by second communication equipment through a transceiver;

Where in fig. 7, the bus architecture may include any number of interconnected buses and bridges, with various circuits being linked together, particularly one or more processors represented by processor 700 and memory represented by memory 720. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 710 may be a number of elements including a transmitter and a transceiver providing a means for communicating with various other apparatus over a transmission medium. The user interface 730 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

The processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 may store data used by the processor 700 in performing operations.

Optionally, the processor 700 is further configured to, before determining the path loss of the through link according to the first transmit power related information, perform the following steps:

Optionally, the step that the processor 700 determines the path loss of the through link according to the first transmission power related information includes:

Optionally, the first transmission power related information is transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal.

Optionally, the correlation factor of the first reference signal transmission power is a straight-through link path loss compensation factor.

Optionally, the first transmission power related information is transmission power of a first reference signal, and the number of the acquired first reference signals is one;

the processor 700 performs the step of determining the through link path loss according to the received power of the first reference signal and the first transmit power related information, including:

determining the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

Optionally, the first transmission power related information is transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

Optionally, the step that the processor 700 determines the through link transmission power of the first communication device according to the through link path loss includes:

Optionally, the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is greater than 0 and less than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

Optionally, the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is greater than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Optionally, the first transmission power related information is a correlation factor of transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

the processor 700 performs the step of determining the path loss of the through link according to the transmission power related information, including:

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

wherein PL represents heddlePath loss of combining, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀And b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

Optionally, the first reference signal includes at least one of:

When executed by the processor 700, the program can implement all the implementation manners in the embodiment of the method for determining transmission power applied to the first communication device, and can achieve the same technical effect, and is not described herein again to avoid repetition.

In some embodiments of the invention, there is also provided a computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:

When executed by the processor, the program can implement all the implementation manners in the embodiment of the method for determining transmission power applied to the first communication device, and can achieve the same technical effect, and is not described herein again to avoid repetition.

As shown in fig. 8, an embodiment of the present invention further provides a communication device, where the communication device is specifically the first communication device, and since a principle of the communication device for solving the problem is similar to the method for determining the transmission power in the embodiment of the present invention, the implementation of the communication device may refer to implementation of the method, and repeated details are omitted. The communication device includes:

a first obtaining module 801, configured to obtain first transmission power related information of a first reference signal sent by a second communication device;

a first determining module 802, configured to determine a path loss of a direct link according to the first transmission power related information, where the path loss of the direct link is a path loss of a direct link between a first communication device and a second communication device or a third communication device that sends the first reference signal;

a second determining module 803, configured to determine the through link transmit power of the first communication device according to the through link path loss.

The communication device of the embodiment of the invention further comprises:

In the communication device according to the embodiment of the present invention, the first determining module is configured to determine the path loss of the through link according to the received power of the first reference signal and the first transmit power related information.

In the communication device of the embodiment of the present invention, the first transmission power related information is transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal.

In the communication device of the embodiment of the present invention, the correlation factor of the first reference signal transmission power is a straight-through link path loss compensation factor.

In the communication device of the embodiment of the present invention, the first transmission power related information is transmission power of a first reference signal, and the number of the acquired first reference signals is one;

the first determining module is configured to determine the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

In the communication device of the embodiment of the present invention, the first transmission power related information is transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

In the communication device of the embodiment of the present invention, the second determining module is configured to determine the through link transmission power of the first communication device according to the following formula;

According to the communication device, the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is greater than 0 and less than or equal to 1, and the number of the acquired first reference signals is one;

the first determining module is configured to determine a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

According to the communication equipment provided by the embodiment of the invention, the first transmission power related information is a related factor h of the transmission power of the first reference signal, h is more than or equal to 1, and the number of the acquired first reference signals is one;

PL_SL＝(P_max-RSRP_SL)/h；

P_maxrepresenting the maximum transmit power, RSRP, of the first communication device_SLRepresents the received power, PL, of the first reference signal_SLTo representThrough link path loss.

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

In the communication device of the embodiment of the present invention, the first transmission power related information is a correlation factor of transmission power of the first reference signal, and the number of the acquired first reference signals is at least two;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

In the communication device of the embodiment of the present invention, the first reference signal includes at least one of:

The communication equipment of the embodiment of the invention acquires the first transmission power related information of the first reference signal sent by the second communication equipment; determining a through link path loss according to the first transmission power related information, wherein the through link path loss is the path loss of a through link between the first communication device and the second communication device or the third communication device which sends the first reference signal; and determining the through link transmitting power of the first communication equipment according to the through link path loss, so that the interference in through link communication can be reduced, and the power consumption of a transmitting end can be reduced.

The communication device of the embodiment of the present invention can implement all implementation manners in the above-described method for determining transmission power applied to the first communication device side, and can achieve the same technical effect, and details are not described here again to avoid repetition.

The embodiment of the present invention further provides a communication device, where the communication device is specifically a second communication device, and the second communication device may be specifically a terminal device or a base station device. Because the principle of the communication device for solving the problem is similar to the information transmission method in the embodiment of the present invention, the implementation of the communication device may refer to the implementation of the method, and repeated details are not repeated.

When the second communication device is a terminal device, the structure of the second communication device is the same as that shown in fig. 8, and details are not repeated here. When the second communication device is a base station device, as shown in fig. 9, the second communication device includes a memory 920, a processor 900, a transceiver 910, a bus interface, and a program stored in the memory 920 and operable on the processor 900, where the processor 900 is configured to read the program in the memory 920 and execute the following processes:

In fig. 9, among other things, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 900, and various circuits, represented by memory 920, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 910 may be a number of elements, including a transmitter and a transceiver, providing a means for communicating with various other apparatus over a transmission medium. The processor 900 is responsible for managing the bus architecture and general processing, and the memory 920 may store data used by the processor 900 in performing operations.

Optionally, the processor 900 is further configured to perform the following steps:

Optionally, the step of the processor 900 executing the first transmission power information for transmitting the first reference signal to the first communication device includes:

Optionally, the step of the processor 900 executing the first transmission power related information of the first reference signal to the first communication device includes:

According to the communication device provided by the embodiment of the invention, the first communication device sends the first transmission power related information of the first reference signal, so that the first communication device determines the path loss of the through link according to the first transmission power related information, and determines the transmission power of the through link of the first communication device according to the path loss of the through link, thereby reducing the interference in the through link communication and simultaneously reducing the power consumption of the sending end.

When executed by the processor 900, the program can implement all the implementation manners in the above-described embodiment of the information transmission method applied to the second communication device side, and can achieve the same technical effect, and is not described herein again to avoid repetition.

When executed by the processor, the program can implement all the implementation manners in the above-described embodiment of the information transmission method applied to the second communication device side, and can achieve the same technical effect, and is not described herein again to avoid repetition.

As shown in fig. 10, an embodiment of the present invention further provides a communication device, where the communication device is specifically a second communication device, and because a principle of the communication device for solving the problem is similar to the information transmission method in the embodiment of the present invention, the implementation of the communication device may refer to implementation of the method, and repeated details are not repeated.

The communication device includes:

a first sending module 1001, configured to send first transmission power related information of a first reference signal to a first communication device, where the first transmission power related information is used by the first communication device to determine a through link path loss.

The communication device implemented by the invention also comprises:

In the communication device implemented by the present invention, the first sending module is configured to send the first transmission power related information through direct link control information SCI on a physical direct link control channel PSCCH of a direct link, or send the first transmission power related information through radio resource control RRC signaling on the direct link, or send the first transmission power related information through a direct link master information block SL-MIB on a PSBCH of the direct link, when the second communication device is a terminal device.

In the communication device implemented by the present invention, the first sending module is configured to send the first transmission power related information through downlink control information DCI on a PDCCH of a downlink air interface link, or send the first transmission power related information through a master information block MIB on a physical broadcast channel PBCH of the downlink air interface link, or send the first transmission power related information through RRC signaling on the downlink air interface link, when the second communication device is a base station device.

The communication device of the embodiment of the present invention can implement all the implementation manners in the above-mentioned information transmission method embodiment applied to the second communication side, and can achieve the same technical effect, and for avoiding repetition, details are not described here again.

In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A method for determining transmit power for use in a first communication device, the method comprising:

determining a through link transmission power of the first communication device according to the through link path loss;

before determining the through link path loss according to the first transmit power related information, the method further includes: receiving a first reference signal sent by the second communication device or the third communication device;

the determining the path loss of the through link according to the first transmission power related information includes:

determining the through link path loss according to the received power of the first reference signal and the first transmission power related information; the first transmission power related information is transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal;

under the condition that the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h is more than 0 and less than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

2. The method of claim 1, wherein the correlation factor of the first reference signal transmit power is a through link path loss compensation factor.

3. The method of claim 1, wherein the first transmission power related information is transmission power of first reference signals, and the number of the acquired first reference signals is one;

determining the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

4. The method of claim 1, wherein the first transmission power related information is transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path sub-loss,

5. The method of claim 3 or 4, wherein the determining the through-link transmit power of the first communication device according to the through-link path loss comprises:

6. The method for determining transmission power according to claim 1, wherein the first transmission power related information is a correlation factor h of transmission power of the first reference signal, h is greater than or equal to 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

P_maxrepresenting the maximum transmit power, RSRP, of the first communication device_SLRepresents a received power of the first reference signal,PL_SLrepresenting the through link path loss.

7. The method of claim 1 or 6, wherein the determining the through-link transmit power of the first communication device according to the through-link path loss comprises:

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

8. The method of claim 1, wherein the first transmission power related information is a correlation factor of transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

wherein PL_SLiRepresenting the ith through-link path loss, RSRP_SLiDenotes the received power, P, of the ith first reference signal_maxRepresenting the maximum transmit power, h, of the first communication device_iDenotes the ith firstCorrelation factor of reference signal transmission power, 0 < h_i≤1，PL_SLDenotes the through link path loss, i ═ 1,2, …, N]N is the number of the first reference signals, N is larger than or equal to 2, and i and N are positive integers.

9. The method of claim 8, wherein the determining the through-link transmit power of the first communication device based on the through-link path loss comprises:

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

10. The method of claim 1, wherein the first transmission power related information is a correlation factor of transmission power of first reference signals, and the number of the acquired first reference signals is at least two;

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

11. The method of claim 10, wherein the determining the through-link transmit power of the first communication device based on the through-link path loss comprises:

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

12. The transmit power determination method of claim 1, wherein the first reference signal comprises at least one of:

13. A communication device, the communication device being a first communication device, comprising: a transceiver, a memory, a processor, and a program stored on the memory and executable on the processor, wherein the processor when executing the program performs the steps of:

the processor is further configured to, before determining the path loss of the through link according to the first transmission power related information, perform the following steps:

receiving, by a transceiver, a first reference signal transmitted by the second communication device or the third communication device;

the processor executing the step of determining the path loss of the through link according to the first transmission power related information comprises:

determining a through link path loss by the following formula;

PL_SL＝h*(P_max-RSRP_SL)；

14. The communications device of claim 13, wherein the correlation factor for the first reference signal transmit power is a through link path loss compensation factor.

15. The communication device of claim 13, wherein the first transmission power related information is transmission power of first reference signals, and the number of acquired first reference signals is one;

determining the through link path loss by the following formula;

wherein PL_SLWhich represents the path loss of the through-link,

16. The communication device of claim 13, wherein the first transmission power related information is transmission power of first reference signals, and the number of acquired first reference signals is at least two;

determining the through link path loss by the following formula;

wherein PL_SLiRepresenting the ith through-link path sub-loss,

17. The communication device of claim 15 or 16, wherein the processor performs the step of determining the through-link transmit power of the first communication device based on the through-link path loss comprises:

wherein PL denotes the integrated path loss, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀Indicating that the direct link has reached the predetermined communication qualityAnd measuring corresponding received power, wherein a represents a first path loss compensation factor, b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

18. The communication device according to claim 13, wherein the first transmission power related information is a correlation factor h of the transmission power of the first reference signal, h ≧ 1, and the number of the acquired first reference signals is one;

determining a through link path loss by the following formula;

PL_SL＝(P_max-RSRP_SL)/h；

19. The communication device of claim 13 or 18, wherein the processor performs the step of determining the through-link transmit power of the first communication device based on the through-link path loss comprises:

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

wherein PL denotes the integrated path loss, P_OUTBRepresenting the through-link transmission power, P, of the first communication device_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀Representing the corresponding received power when the straight-through link reaches the preset communication quality, b representing the second path loss compensation factor, c representing the third pathA path loss compensation factor.

20. The communication device of claim 13, wherein the first transmission power related information is a correlation factor of a first reference signal transmission power, and the number of the acquired first reference signals is at least two;

determining the through link path loss by the following formula;

PL_SLi＝h_i*(P_max-RSRP_SLi)；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

21. The communications device of claim 20, wherein said processor performs the step of determining a through-link transmit power of said first communications device based on said through-link path loss comprises:

h＝max(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

wherein PL denotes the integrated path loss, P_OUTBIndicating through link transmission power of a first communication deviceRate, P_maxDenotes the maximum transmission power of the first communication device, BW denotes the frequency bandwidth occupied by the transmission signal of the first communication device, P₀And b represents a second path loss compensation factor, and c represents a third path loss compensation factor.

22. The communication device of claim 13, wherein the first transmission power related information is a correlation factor of a first reference signal transmission power, and the number of the acquired first reference signals is at least two;

determining a through link path loss by the following formula;

PL_SLi＝(P_max-RSRP_SLi)/h_i；PL_SL＝max(PL_SL1，PL_SL2，…PL_SLN)；

23. The communications device of claim 22, wherein said processor performs the step of determining a through-link transmit power of said first communications device based on said through-link path loss comprises:

h＝1/min(h₁，h₂，…，h_N)；

PL＝min(h*PL_SL，b*PL_UL)；

P_OUTB＝min(P_max，10*log₁₀(BW)+P₀+c*PL)；

24. The communications device of claim 13, wherein the first reference signal comprises at least one of:

25. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the transmission power determination method according to any one of claims 1 to 12.

26. A communication device, the communication device being a first communication device, comprising:

a second determining module, configured to determine a through link transmit power of the first communication device according to the through link path loss;

a receiving module, configured to receive, according to the first transmission power related information, a first reference signal sent by the second communication device or the third communication device before determining a path loss of a through link;

the first determining module is configured to determine the through link path loss according to the received power of the first reference signal and the first transmit power related information; the first transmission power related information is transmission power of the first reference signal or a correlation factor of the transmission power of the first reference signal;

PL_SL＝h*(P_max-RSRP_SL)；