A communication method and apparatus

Abstract

The application relates to a communication method and device, which can be applied to Internet of Vehicles, such as V2X, LTE-V, V2V, etc., or can be used in the fields of intelligent driving, intelligent networked vehicles, etc. A terminal device determines an initial transmission power of each of at least two sidelink signals. The sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device. The terminal device determines a first transmission power of an i-th sidelink signal in the at least two sidelink signals according to the priority of the at least two sidelink signals, i is an integer from 1 to N, and N is the number of the at least two sidelink signals. The terminal device transmits the i-th sidelink signal on an i-th sidelink in the at least two sidelinks according to the first transmission power of the i-th sidelink signal.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, and in particular to a communication method and device. BACKGROUND

[0002] Uplink power control is very important in a wireless communication system. Through uplink power control, the terminal device can ensure the quality of uplink data and reduce the interference to the system and other users as much as possible, thereby prolonging the use time of the terminal device battery. Through uplink power control, the base station can adapt the uplink transmission to different wireless transmission environments, including path loss, shadowing, fast fading, interference from other terminal devices in the cell and between cells, and the like.

[0003] For example, for uplink control channels or uplink data channels, there are corresponding formulas for calculating the uplink transmission power, thereby realizing uplink power control.

[0004] However, currently, there are only corresponding uplink power control schemes when the terminal device transmits uplink data or uplink control information. However, due to the application of vehicle to everything (V2X) and other technologies, the terminal device may transmit sidelink signals in addition to uplink signals. However, there is currently no power control mechanism for the scenario in which the terminal device transmits sidelink signals. SUMMARY

[0005] Embodiments of the present application provide a communication method and device for providing a power control mode for a terminal device when transmitting sidelink signals.

[0006] In a first aspect, a first communication method is provided, which includes: a terminal device determining an initial transmission power of each of at least two sidelink signals; the sum of the initial transmission powers of the at least two sidelink signals being greater than the maximum transmission power of the terminal device; the terminal device determining a first transmission power of an i-th sidelink signal in the at least two sidelink signals according to the priority of the at least two sidelink signals, i being an integer from 1 to N, N being the number of the at least two sidelink signals; and the terminal device transmitting the i-th sidelink signal on an i-th sidelink in at least two sidelinks according to the first transmission power of the i-th sidelink signal.

[0007] The method can be performed by a first communication device, which can be a communication device or a communication device capable of supporting the functions required by the communication device to implement the method, such as a chip system. Illustratively, the first communication device is a terminal device. Illustratively, the terminal device is a terminal device, or a chip system provided in the terminal device for implementing the functions of the terminal device, or other components for implementing the functions of the terminal device.

[0008] In the embodiment of the present application, if the sum of the transmission powers of the at least two sidelinks is greater than the maximum transmission power of the terminal device, the terminal device can re-determine the transmission powers of the at least two sidelinks (that is, determine the first transmission powers of the at least two sidelinks) according to the priorities of the at least two sidelinks. For example, after re-determining the transmission powers, the sum of the transmission powers of the at least two sidelinks can be less than or equal to the maximum transmission power of the terminal device, so that the total transmission power of the terminal device when transmitting the sidelinks is controlled within the capability range of the terminal device, and the terminal device can transmit the sidelinks. The scheme provided in the embodiment of the present application provides a power control solution for the scenario that the terminal device transmits sidelinks to multiple receiving ends. Through the power control manner, the transmission success rate of the sidelinks is improved. Moreover, the terminal device can re-determine the transmission powers of the sidelinks according to the priorities of the at least two sidelinks. For example, for a sidelink with a higher priority, the transmission power of the sidelink can be kept consistent with the transmission power before re-determination or can have a small difference, so that the high-priority service can be transmitted as much as possible.

[0009] In a possible implementation, the terminal device determines the first transmission power of an i th sidelink in the at least two sidelinks according to the priority of the i th sidelink, and the method comprises the following steps.

[0010] The terminal device determines the first transmission power of the i th sidelink according to the first power control factor corresponding to the i th sidelink, wherein the value of the first power control factor corresponding to the i th sidelink is determined according to the priority of the i th sidelink.

[0011] In the first implementation, the first power control factor can be designed according to the priority of the service. For example, the first power control factor of the i th sidelink is represented by λ i If the priority of a sidelink is higher, the sidelink can be satisfied as much as possible. For example, the higher the priority of a sidelink is, the greater the value of the first power control factor corresponding to the sidelink can be. Thus, through the first power control factor, the transmission power of a sidelink with a higher priority can be satisfied as much as possible, and the transmission power of a sidelink with a lower priority can be relatively reduced, so that the sidelink with a higher priority can be transmitted with high quality as much as possible.

[0012] In a possible implementation, the terminal device determines the first transmission power of the i th sidelink according to the first power control factor corresponding to the i th sidelink, and the method comprises the following steps.

[0013] The first transmission power of the ith sidelink signal satisfies the following formula:

[0014] P' SLj,i = P CMAX + 10lg{(λ i * P SLj,i ) / ∑λ i * P SLj,i}

[0015] wherein P' SLj,i represents the first transmission power of the ith sidelink signal, P CMAX represents the maximum transmission power of the terminal device, λ i represents the first power control factor corresponding to the ith sidelink signal, and P SLj,i represents the initial transmission power of the ith sidelink signal.

[0016] Here, it is only one way for the terminal device to determine the first transmission power of the ith sidelink signal according to the first power control factor corresponding to the ith sidelink signal. The embodiments of the present application do not limit the terminal device to determine the first transmission power of the ith sidelink signal according to the first power control factor corresponding to the ith sidelink signal in other ways. The terminal device can determine the first transmission power of each of the at least two sidelink signals according to formula 12. The sum of the transmission powers of the at least two sidelink signals thus determined can be less than or equal to P CMAX , so that the first terminal device can transmit the at least two sidelink signals on the at least two sidelinks according to the first transmission powers of the at least two sidelink signals. Wherein the terminal device transmits the ith sidelink signal on the ith sidelink according to the first transmission power of the ith sidelink signal, that is, the first transmission power, the sidelink, and the sidelink signal are one-to-one corresponding. Moreover, the terminal device can determine the first transmission power according to the priority of the sidelink signal. For the sidelink signal with higher priority, the determined first transmission power can be larger, and for the sidelink signal with lower priority, the determined first transmission power can be smaller. In this way, the transmission success rate of the sidelink signal with higher priority can be improved as much as possible.

[0017] In a possible implementation, the ith sidelink signal includes a sidelink control signal and a sidelink data signal, P SLj,i = P PSCCH,i + P PSSCH,i , wherein P PSCCH,i represents the initial transmission power of the sidelink control signal included in the ith sidelink signal, and P PSSCH,i represents the initial transmission power of the sidelink data signal included in the ith sidelink signal.

[0018] The ith sidelink signal includes, for example, a sidelink control signal, or includes a sidelink data signal, or includes both a sidelink control signal and a sidelink data signal. If the ith sidelink signal includes a sidelink control signal but does not include a sidelink data signal, then P PSSCH,i = 0, or if the ith sidelink signal includes a sidelink data signal but does not include a sidelink control signal, then P PSCCH,i = 0. The initial transmission power of the ith sidelink signal can be equal to the sum of the initial transmission powers of the sidelink control signal and the sidelink data signal, so that when the initial transmission power of the ith sidelink signal is calculated, the initial transmission powers of various signals included in the ith sidelink signal can be considered, so that the calculation result is more accurate.

[0019] In a possible implementation, P PSCCH,i satisfies the following formula:

[0020]

[0021] wherein P PSCCH,i represents the initial transmission power of the sidelink control signal included in the ith sidelink signal, P CMAX represents the maximum transmission power of the terminal device, M PSCCH represents the bandwidth of the sidelink control channel on which the sidelink control signal included in the ith sidelink signal is located, M PSSCH represents the bandwidth of the sidelink data channel on which the sidelink data signal included in the ith sidelink signal is located, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the reception end of the ith sidelink signal, a PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0022] The initial transmission power of the sidelink control signal included in the ith sidelink signal can be calculated by the formula, and the initial transmission power of the ith sidelink signal can be equal to the sum of the initial transmission powers of the sidelink control signal and the sidelink data signal included in the ith sidelink signal, so that when the initial transmission power of the ith sidelink signal is calculated, the initial transmission powers of various signals included in the ith sidelink signal can be considered, so that the calculation result is more accurate. Of course, here is only one way for the terminal device to determine the initial transmission power of the sidelink control signal included in the ith sidelink signal, and the embodiments of the application do not limit the terminal device to determine the initial transmission power of the sidelink control signal included in the ith sidelink signal in other ways.

[0023] In a possible implementation, P PSSCH,i satisfies the following formula:

[0024]

[0025] wherein PPSSCH,i denotes the initial transmission power of the data signal included in the ith sidelink signal, P CMAX denotes the maximum transmission power of the terminal device, M PSCCH denotes the bandwidth of the control channel on which the control signal included in the ith sidelink signal is located, M PSSCH denotes the bandwidth of the sidelink data channel on which the sidelink data signal included in the ith sidelink signal is located, P OPSSCH,3 denotes the reception power of the sidelink data signal expected by the reception end of the ith sidelink signal, a PSSCH,3 denotes a filtering parameter, and PL denotes path loss.

[0026] The initial transmission power of the sidelink data signal included in the ith sidelink signal can be calculated by the formula, and the initial transmission power of the ith sidelink signal can be equal to the sum of the initial transmission powers of the sidelink control signal and the sidelink data signal included in the ith sidelink signal, so that when the initial transmission power of the ith sidelink signal is calculated, the initial transmission powers of various signals included in the ith sidelink signal can be considered, so that the calculation result is more accurate. Of course, here is only one way for the terminal device to determine the initial transmission power of the sidelink data signal included in the ith sidelink signal, and the terminal device can also determine the initial transmission power of the sidelink data signal included in the ith sidelink signal in other ways.

[0027] In a possible implementation, PL satisfies the following formula:

[0028] PL = min{PL UP , γ i * PL SL,j}; or,

[0029] PL = max{PL min , min{PL UL , γ i * PL SL,i}}; or,

[0030] PL = min{max{PL min , PL UL}, γ i * PL SL,i};

[0031] wherein PL UP denotes the path loss between the terminal device and the network device, γ i denotes the second power control factor of the ith sidelink signal, the value of the second power control factor being determined according to the priority of the ith sidelink signal, and PL min denotes the first threshold of path loss.

[0032] For example, for the unicast mode, the link loss between the transmitting end of the sidelink service and the receiving end of the sidelink service in the unicast scenario is defined as PL SL In the scenario of network device coverage, even if the terminal device transmits a sidelink signal on the sidelink, the interference to the network device still needs to be considered. The link loss from the transmitting end of the sidelink service to the network device is denoted as PL UP In the embodiments of the present application, as an optional mode, a second power control factor, denoted as γ i , can be introduced. For example, the power control factor γ i may be designed according to the priority of the service. The higher the priority of a sidelink signal is, the greater the value of the second power control factor corresponding to the sidelink carrying the sidelink signal is. Thus, through the second power control factor, the transmission power of the sidelink signal with a high priority can be made to meet the requirement of the sidelink signal as much as possible, and the transmission power of the sidelink signal with a low priority can be relatively reduced, so as to ensure that the signal with a high priority can be transmitted with high quality as much as possible.

[0033] In the first formula, the minimum value of the two terms is taken as PL. Then it is very likely that the calculated link budget is relatively small, so that the transmission power of the first terminal device is insufficient, causing the receiving end to fail to correctly receive the sidelink signal from the terminal device. Therefore, as an optional mode, the present application can further improve the link budget. For example, the PL corresponding to the ith sidelink signal can satisfy the second formula as follows. In the second formula, PL min is set to be greater than or equal to PL min , so as to prevent the value of PL from being too small.

[0034] Alternatively, considering that the actual link budget of some sidelinks is indeed relatively small, in order to make the calculated link budget more accurate, the third formula as above can also be used to calculate PL. The second formula or the third formula as above are both further modifications of the link budget, the PL min is introduced, and the calculation method of the link budget is redesigned to prevent the link budget of the sidelink from being too small, and to ensure that the receiving end can normally receive the sidelink signal from the terminal device as much as possible.

[0035] The embodiments of the present application redefine the size of the path loss from the perspective of improving the system total throughput and reducing the interference. The link loss is recalculated, not only considering the influence of the transmission power of the sidelink on the uplink channel, but also considering the required link budget of the sidelink itself, so that the link loss is more accurate.

[0036] In a possible implementation, the terminal device determines the first transmission power of the i-th sidelink signal among the at least two sidelink signals according to the priorities of the at least two sidelink signals, including:

[0037] The terminal device determines the first transmission power of part of the sidelink signals to be 0 until the sum of the initial transmission powers of the sidelink signals whose initial transmission powers are not 0 is less than or equal to the maximum transmission power of the terminal device, the priorities of the part of the sidelink signals being less than or equal to the priorities of the sidelink signals whose initial transmission powers are not 0.

[0038] In this implementation, if the terminal device determines that the total initial transmission power of the at least two sidelink signals is greater than P CMAX , the terminal device can give up the transmission of the sidelink signals with low priorities in turn according to the priorities of the sidelink signals until the total initial transmission power of the at least two sidelink signals is less than or equal to P CMAX . In the process of giving up, if there are multiple sidelink signals with the same priority and the priority is low and needs to be given up, the terminal device can give up all the multiple sidelink signals, or the terminal device can give up the sidelink signals with large transmission power in the multiple sidelink signals in turn, or the terminal device can randomly select one or more sidelink signals in the multiple sidelink signals to give up. The terminal device giving up (or giving up transmission) a sidelink signal can be understood as that the terminal device does not transmit the sidelink signal, for example, the terminal device can set the transmission power of the sidelink signal to 0, and then the terminal device does not transmit the sidelink signal. The terminal device not transmitting a sidelink signal means that the terminal device does not transmit the sidelink signal at the first time, and the first time is the time determined by the terminal device to transmit the at least two sidelink signals on the at least two sidelink. While specifically, the terminal device can directly discard the sidelink signal and does not transmit the sidelink signal after the first time; or the terminal device can transmit the sidelink signal after the first time to improve the success rate of service transmission, which is not limited in specific.

[0039] Through this implementation, the terminal device can discard part or all of the sidelink signals, without the need to recalculate the transmission power of the sidelink signals, for example, for the sidelink signals that are not discarded, the initial transmission power of the sidelink signals can be used as the first transmission power, reducing the process of the terminal device calculating the transmission power of the sidelink signals and saving the power consumption of the terminal device.

[0040] In a second aspect, a second communication method is provided. The method comprises: determining, by a terminal device, that an uplink signal is to be transmitted on an uplink at the same time as at least one sidelink signal is to be transmitted on at least one sidelink; and determining, by the terminal device, a transmission power of an i-th sidelink signal of the at least one sidelink signal according to a first transmission power, a power boost, and a second transmission power, the first transmission power being a transmission power of the uplink signal when the terminal device transmits only the uplink signal, the second transmission power being a transmission power of the uplink signal when the terminal device transmits the uplink signal and the at least one sidelink signal at the same time, the power boost representing an increase in maximum transmission power of the terminal device when the terminal device transmits the uplink signal and the sidelink signal at the same time relative to a case where the terminal device transmits only the uplink signal, i being an integer from 1 to N, N being a number of the at least one sidelink signal.

[0041] The method can be performed by a second communication device, which can be a communication apparatus or a communication device, such as a chip system, capable of supporting the functions required by the communication apparatus to implement the method. For example, the second communication device is a terminal device. For example, the terminal device is a terminal apparatus, or a chip system provided in the terminal apparatus and used to implement the functions of the terminal apparatus, or other components used to implement the functions of the terminal apparatus.

[0042] In the embodiments of the present application, power control rules are provided for a scenario in which a first terminal device needs to transmit an uplink signal and a sidelink signal at the same time, so that the first terminal device can complete transmission of the uplink signal and the sidelink signal as much as possible through power control, thereby improving the success rate of signal transmission. For example, the maximum transmission power of the terminal device when the terminal device transmits the uplink signal and the sidelink signal at the same time can be increased relative to a case where the terminal device transmits only the uplink signal, that is, the terminal device can transmit at a greater transmission power when the terminal device transmits the uplink signal and the sidelink signal at the same time, so that the transmission power of the terminal device can meet the requirements of the uplink signal and the sidelink signal for transmission power as much as possible, thereby improving the success rate of transmission of the uplink signal and the sidelink signal.

[0043] In a possible implementation, the total transmission power of the at least one sidelink signal satisfies the following formula:

[0044] ∑P SL ≤(1+λ)P1-P UL

[0045] wherein ∑P SL represents the total transmission power of the at least one sidelink signal, λ represents the power boost, P1 represents the first transmission power, and P UL represents the second transmission power.

[0046] It can be considered that (1+λ)P1 is equal to the maximum transmission power when the terminal device transmits the uplink signal and the sidelink signal simultaneously, that is, the total transmission power of the at least one sidelink signal can be less than or equal to the difference between the maximum transmission power when the terminal device transmits the uplink signal and the sidelink signal simultaneously and the second transmission power, so as to ensure that the capability of the terminal device can support the terminal device to transmit the uplink signal and the at least one sidelink signal.

[0047] In a possible implementation, the terminal device determines the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, and the second transmission power, including:

[0048] The terminal device determines the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal.

[0049] For example, the first terminal device can determine the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, and the second transmission power. As an optional mode, the first terminal device determines the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, and the second transmission power can be that the first terminal device determines the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal (or the number of the at least one sidelink). It can be understood that the first terminal device can determine the transmission power of the at least one sidelink signal according to the first information, and the first information can include the first transmission power, the power boosting amount, and the second transmission power. Optionally, the first information can also include the number of the at least one sidelink signal. In addition, since i is an integer from 1 to N, it can also be understood that the first terminal device determines the transmission power of each sidelink signal in the at least one sidelink signal according to the first information. The power boosting amount is considered when determining the transmission power of the i-th sidelink signal, so that the capability of the terminal device can meet the demand of the i-th sidelink signal for transmission power as much as possible. Moreover, the number of the at least one sidelink signal is also considered when determining the transmission power of the i-th sidelink signal, so as not to allocate all the transmission power of the terminal device to one sidelink signal, but to consider the demand of each sidelink signal comprehensively.

[0050] In a possible implementation, the terminal device determines the transmission power of the ith sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal, and the determination includes:

[0051] The transmission power of the sidelink control signal included in the ith sidelink signal satisfies the following formula:

[0052]

[0053] wherein P PSCCH represents the transmission power of the sidelink control signal included in the ith sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P UL represents the second transmission power, M PSCCH represents the bandwidth of the sidelink control channel occupied by the sidelink control signal included in the first sidelink signal, M PSSCH represents the bandwidth of the sidelink data channel occupied by the sidelink data signal included in the first sidelink signal, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the reception end of the ith sidelink signal, α PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0054] The ith sidelink signal includes, for example, a sidelink control signal, or includes a sidelink data signal, or includes both a sidelink control signal and a sidelink data signal. If the ith sidelink signal includes a sidelink control signal but does not include a sidelink data signal, then P PSSCH = 0, or if the ith sidelink signal includes a sidelink data signal but does not include a sidelink control signal, then P PSCCH = 0. The transmission power of the ith sidelink signal can be equal to the sum of the transmission power of the sidelink control signal and the transmission power of the sidelink data signal, so that when calculating the transmission power of the ith sidelink signal, the transmission power of various signals included in the ith sidelink signal can be considered, so that the calculation result is more accurate. When determining the transmission power of the sidelink control signal included in the ith sidelink signal, the power boosting amount is considered, so that the capability of the terminal device can meet the demand of the sidelink control signal included in the ith sidelink signal for transmission power as much as possible. Moreover, when determining the transmission power of the sidelink control signal included in the ith sidelink signal, the number of the at least one sidelink signal is also considered, so that the transmission power of the terminal device is not all allocated to one sidelink signal, but the demands of various sidelink signals can be considered comprehensively.

[0055] In a possible implementation, the terminal device determines the transmission power of the ith sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal, and the determination includes:

[0056] The transmission power of the sidelink data signal included in the ith sidelink signal satisfies the following formula:

[0057]

[0058] wherein P PSsCH represents the transmission power of the sidelink data signal included in the ith sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P UL represents the second transmission power, M PSCCH represents the bandwidth of the sidelink control channel occupied by the sidelink control signal included in the ith sidelink signal, M PSSCH represents the bandwidth of the sidelink data channel occupied by the sidelink data signal included in the ith sidelink signal, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the reception end of the ith sidelink signal, α PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0059] The ith sidelink signal includes, for example, a sidelink control signal, or includes a sidelink data signal, or includes both a sidelink control signal and a sidelink data signal. If the ith sidelink signal includes a sidelink control signal but does not include a sidelink data signal, then P PSSCH = 0, or if the ith sidelink signal includes a sidelink data signal but does not include a sidelink control signal, then P PSCCH = 0. The transmission power of the ith sidelink signal can be equal to the sum of the transmission power of the sidelink control signal and the transmission power of the sidelink data signal, so that when calculating the transmission power of the ith sidelink signal, the transmission power of various signals included in the ith sidelink signal can be considered, so that the calculation result is more accurate. When determining the transmission power of the sidelink data signal included in the ith sidelink signal, the power boosting amount is considered, so that the capability of the terminal device can meet the demand of the sidelink data signal included in the ith sidelink signal for transmission power as much as possible. Moreover, when determining the transmission power of the sidelink data signal included in the ith sidelink signal, the number of at least one sidelink signal is also considered, so that the transmission power of the terminal device is not all allocated to one sidelink signal, but the demands of various sidelink signals can be considered comprehensively.

[0060] In a possible implementation, the method further includes:

[0061] The terminal device determines the second transmission power according to the first transmission power.

[0062] The first transmission power is the transmission power of the uplink signal when the terminal device only transmits the uplink signal, and the second transmission power is the transmission power of the uplink signal when the terminal device simultaneously transmits the uplink signal and at least one sidelink signal. The first transmission power can be calculated by the terminal device, and the second transmission power can be directly determined according to the first transmission power, so that the terminal device can obtain the first transmission power and the second transmission power.

[0063] In a possible implementation, the terminal device determines the second transmission power according to the first transmission power, including:

[0064] The second transmission power satisfies the following formula:

[0065] P UL =min{P1,P OPUSCH +10log 10 (2 u *M PUSCH )+α·PL+△TF+δ}[dBm]

[0066] Wherein, P UL represents the second transmission power, P1 represents the first transmission power, M PUSCH represents the bandwidth of the channel occupied by the uplink signal, represents the receiving power of the uplink signal expected by the receiving end corresponding to the uplink signal, PL represents the path loss, α is the compensation parameter of the uplink path loss, △TF is the parameter related to the modulation and coding mode, δ represents the closed loop power control adjustment amount, and u represents the subcarrier spacing of the subcarrier where the uplink signal is located.

[0067] Here, a way for the terminal device to determine the second transmission power according to the first transmission power is given, and the second transmission power can be obtained through the formula. Of course, the calculation of the second transmission power through the formula is only an example, and the embodiments of the present application do not limit the terminal device to determine the second transmission power according to the first transmission power through other ways.

[0068] In a third aspect, a communication device is provided, for example, the communication device is the first communication device as described above. The first communication device is configured to perform the method in the first aspect or any possible implementation. Specifically, the first communication device can include a module for performing the method in the first aspect or any possible implementation, for example, including a processing module and a transceiver module. Illustratively, the first communication device is a terminal device. Illustratively, the first communication device is a communication device, or a chip or other component arranged in the communication device. Illustratively, the communication device is a terminal device. Hereinafter, the first communication device is taken as an example. Wherein,

[0069] The processing module is configured to determine an initial transmission power of each of the at least two sidelink signals;

[0070] The sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device, and the processing module is further configured to determine a first transmission power of an i-th sidelink signal in the at least two sidelink signals according to priorities of the at least two sidelink signals, where i is an integer from 1 to N, and N is a number of the at least two sidelink signals.

[0071] The transceiver module is configured to transmit the i-th sidelink signal on an i-th sidelink in the at least two sidelink according to the first transmission power of the i-th sidelink signal.

[0072] In a possible implementation, the processing module is configured to determine the first transmission power of the i-th sidelink signal in the at least two sidelink signals according to the priorities of the at least two sidelink signals in the following manner:

[0073] The first transmission power of the i-th sidelink signal is determined according to a first power control factor corresponding to the i-th sidelink signal, where a value of the first power control factor corresponding to the i-th sidelink signal is determined according to the priority of the i-th sidelink signal.

[0074] In a possible implementation, the processing module is configured to determine the first transmission power of the i-th sidelink signal according to the first power control factor corresponding to the i-th sidelink signal in the following manner:

[0075] The first transmission power of the i-th sidelink signal satisfies the following formula:

[0076] P′ SLj,i =P CMAX +10lg{(λ i *P SLj,i ) / ∑λ i *P SLj,i}

[0077] where P′ SLj,i represents the first transmission power of the i-th sidelink signal, P CMAX represents the maximum transmission power of the terminal device, λ i represents the first power control factor corresponding to the i-th sidelink signal, and P SLj,i represents the initial transmission power of the i-th sidelink signal.

[0078] In a possible implementation, the i-th sidelink signal includes a sidelink control signal and a sidelink data signal, and P SLj,i =P PSCCH,i+P PSSCH,i , wherein P PSCCH,i represents the initial transmission power of the sidelink control signal included in the i-th sidelink signal, P PSSCH,i represents the initial transmission power of the sidelink data signal included in the i-th sidelink signal.

[0079] In a possible implementation, P PSCCH,i satisfies the following formula:

[0080]

[0081] , wherein P PSCCH,i represents the initial transmission power of the sidelink control signal included in the i-th sidelink signal, P CMAX represents the maximum transmission power of the terminal device, M PSCCH represents the bandwidth of the sidelink control channel on which the sidelink control signal included in the i-th sidelink signal is located, M PSSCH represents the bandwidth of the sidelink data channel on which the sidelink data signal included in the i-th sidelink signal is located, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the receiving end of the i-th sidelink signal, a PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0082] In a possible implementation, P PSSCH,i satisfies the following formula:

[0083]

[0084] , wherein P PSSCH,i represents the initial transmission power of the data signal included in the i-th sidelink signal, P CMAX represents the maximum transmission power of the terminal device, M PSCCH represents the bandwidth of the control channel on which the control signal included in the i-th sidelink signal is located, M PSSCH represents the bandwidth of the sidelink data channel on which the sidelink data signal included in the i-th sidelink signal is located, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the receiving end of the i-th sidelink signal, a PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0085] In a possible implementation, PL satisfies the following formula:

[0086] PL = min{PL UP , γ i *PL SL,j}; or,

[0087] PL = max{PLmin min{PL UL ,γ i *PL SL,i}}; or,

[0088] PL = min{max{PL min , PL UL}, γ i *PL SL,i};

[0089] wherein, PL UP denotes a path loss between the terminal device and a network device, γ i denotes a second power control factor of the ith sidelink signal, the value of the second power control factor being determined according to a priority of the ith sidelink signal, PL min denotes a first threshold of path loss.

[0090] In a possible implementation, the processing module is configured to determine the first transmission power of the ith sidelink signal among the at least two sidelink signals according to the priorities of the at least two sidelink signals by:

[0091] determining the first transmission power of part of the at least two sidelink signals as 0 until the sum of the initial transmission powers of the sidelink signals whose initial transmission powers are not 0 is less than or equal to the maximum transmission power of the terminal device, the priorities of the part of the at least two sidelink signals being less than or equal to the priorities of the sidelink signals whose initial transmission powers are not 0.

[0092] As to the technical effects of the third aspect or the various possible implementations of the third aspect, reference can be made to the introduction of the technical effects of the first aspect or the corresponding implementation of the first aspect.

[0093] In a fourth aspect, a communication device is provided, for example, the communication device is the second communication device as described above. The second communication device is configured to perform the method in the second aspect or any possible implementation. Specifically, the second communication device can include a module for performing the method in the second aspect or any possible implementation, for example, a processing module. Optionally, the second communication device can also include a transceiver module. Illustratively, the second communication device is a terminal device. Illustratively, the second communication device is a communication device, or a chip or other component provided in the communication device. Illustratively, the communication device is a terminal device. Hereinafter, the second communication device is taken as an example of a terminal device. Wherein,

[0094] the processing module is configured to determine that the uplink signal is to be simultaneously transmitted on the uplink and the at least one sidelink signal is to be simultaneously transmitted on the at least one sidelink;

[0095] The processing module is further configured to determine a transmission power of an i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, and a second transmission power, the first transmission power being a transmission power of the uplink signal when the terminal device transmits only the uplink signal, the second transmission power being a transmission power of the uplink signal when the terminal device transmits the uplink signal and the at least one sidelink signal simultaneously, the power boosting amount representing an amount of boosting of a maximum transmission power of the terminal device relative to a case where the terminal device transmits only the uplink signal, i being an integer from 1 to N, and N being a number of the at least one sidelink signal.

[0096] In a possible implementation, the total transmission power of the at least one sidelink signal satisfies the following formula:

[0097] ∑P SL ≤(1+λ)P1-P UL

[0098] wherein ∑P SL represents the total transmission power of the at least one sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, and P UL represents the second transmission power.

[0099] In a possible implementation, the processing module is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, and the second transmission power in the following manner:

[0100] determining the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal.

[0101] In a possible implementation, the processing module is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal in the following manner:

[0102] The transmission power of a sidelink control signal included in the i-th sidelink signal satisfies the following formula:

[0103]

[0104] wherein P PSCCH represents the transmission power of the sidelink control signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, and P ULrepresents the second transmission power, M PSCCH represents a bandwidth of a sidelink control channel occupied by a sidelink control signal included in the first sidelink signal, M PSSCH represents a bandwidth of a sidelink data channel occupied by a sidelink data signal included in the first sidelink signal, P OPSSCH,3 represents a reception power of the sidelink data signal expected by a reception end of the i-th sidelink signal, a PSSCH,3 represents a filtering parameter, and PL represents a path loss.

[0105] In a possible implementation, the processing module is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal, in the following manner:

[0106] The transmission power of the sidelink data signal included in the i-th sidelink signal satisfies the following formula:

[0107]

[0108] wherein P PSsCH represents the transmission power of the sidelink data signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, and P UL represents the second transmission power, M PSCCH represents a bandwidth of a sidelink control channel occupied by a sidelink control signal included in the i-th sidelink signal, M PSSCH represents a bandwidth of a sidelink data channel occupied by a sidelink data signal included in the i-th sidelink signal, P OPSSCH,3 represents a reception power of the sidelink data signal expected by a reception end of the i-th sidelink signal, a PSSCH,3 represents a filtering parameter, and PL represents a path loss.

[0109] In a possible implementation, the processing module is further configured to determine the second transmission power according to the first transmission power.

[0110] In a possible implementation, the processing module is configured to determine the second transmission power according to the first transmission power, in the following manner:

[0111] The second transmission power satisfies the following formula:

[0112] P UL = min{P1, P OPUSCH + 10 log 10 (2 u *M PUSCH )+ a·PL+△TF+δ}[dBm]

[0113] wherein P UL denotes the second transmission power, P1 denotes the first transmission power, M PUSCH denotes a bandwidth of a channel occupied by the uplink signal, denotes a reception power of the uplink signal expected by a receiving end corresponding to the uplink signal, PL denotes path loss, a is a compensation parameter of uplink path loss, TF is a parameter related to a modulation and coding mode, and d denotes a closed loop power control adjustment amount, and u denotes a subcarrier spacing of a subcarrier in which the uplink signal is located.

[0114] As to the technical effects of the fourth aspect or the various possible implementation manners of the fourth aspect, reference can be made to the introduction of the technical effects of the second aspect or the corresponding implementation manners of the second aspect.

[0115] In a fifth aspect, a communication apparatus, for example, the first communication apparatus as described above, is provided. The communication apparatus includes a processor and a transceiver. The processor and the transceiver are coupled to each other, and used to implement the method described in the first aspect or the various possible implementation manners. Optionally, the first communication apparatus can further include a memory. The processor, the memory and the transceiver are coupled to each other, and used to implement the method described in the first aspect or the various possible implementation manners. Illustratively, the first communication apparatus is a terminal apparatus. Illustratively, the first communication apparatus is a communication device, or a chip or other component provided in the communication device (if the first communication apparatus is a terminal apparatus, the terminal apparatus can be an apparatus provided independently, or can be a chip or other component provided in the communication device). Illustratively, the communication device is a terminal device. Hereinafter, the first communication apparatus is taken as an example of a terminal apparatus. If the first communication apparatus is a communication device, the transceiver is implemented, for example, through an antenna, a feed line and a codec in the communication device. Or, if the first communication apparatus is a chip or other component provided in the communication device, or the first communication apparatus is a chip provided in the communication device, the transceiver is, for example, a communication interface in the chip, which is connected with a radio frequency transceiving component in the communication device to implement the transceiving of information through the radio frequency transceiving component. Wherein,

[0116] The processor is configured to determine an initial transmission power of each of the at least two sidelink signals.

[0117] The sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal apparatus, and the processor is further configured to determine, according to the priorities of the at least two sidelink signals, a first transmission power of an i-th sidelink signal in the at least two sidelink signals, i is an integer from 1 to N, and N is the number of the at least two sidelink signals.

[0118] The transceiver is configured to transmit the ith sidelink signal on an ith sidelink of the at least two sidelinks according to a first transmission power of the ith sidelink signal.

[0119] In a possible implementation, the processor is configured to determine the first transmission power of the ith sidelink signal according to the priority of the at least two sidelink signals by:

[0120] determining the first transmission power of the ith sidelink signal according to a first power control factor corresponding to the ith sidelink signal, wherein a value of the first power control factor corresponding to the ith sidelink signal is determined according to the priority of the ith sidelink signal.

[0121] In a possible implementation, the processor is configured to determine the first transmission power of the ith sidelink signal according to the first power control factor corresponding to the ith sidelink signal by:

[0122] The first transmission power of the ith sidelink signal satisfies the following formula:

[0123] P′ SLj,i = P CMAX + 10lg{(λ i * P SLj,i ) / ∑λ i * P SLj,i}

[0124] wherein P′ SLj,i represents the first transmission power of the ith sidelink signal, P CMAX represents the maximum transmission power of the terminal device, λ i represents the first power control factor corresponding to the ith sidelink signal, and P SLj,i represents an initial transmission power of the ith sidelink signal.

[0125] In a possible implementation, the ith sidelink signal includes a sidelink control signal and a sidelink data signal, and P SLj,i = P PSCCH,i + P PSSCH,i , wherein P PSCCH,i represents an initial transmission power of the sidelink control signal included in the ith sidelink signal, and P PSSCH,i represents an initial transmission power of the sidelink data signal included in the ith sidelink signal.

[0126] In a possible implementation, P PSCCH,i satisfies the following formula:

[0127]

[0128] wherein P PSCCH,i represents the initial transmission power of the control signal comprised in the ithsidelink signal, P CMAX represents the maximum transmission power of the terminal device, M PSCCH represents the bandwidth of the control channel where the control signal comprised in the ithsidelink signal is located, M PSSCH represents the bandwidth of the sidelink data channel where the sidelink data signal comprised in the ithsidelink signal is located, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the receiving end of the ithsidelink signal, a PSSCH,3 represents a filtering parameter, and PLrepresents path loss.

[0129] In a possible implementation, P PSSCH,i satisfies the following formula:

[0130]

[0131] wherein P PSSCH,i represents the initial transmission power of the data signal comprised in the ithsidelink signal, P CMAX represents the maximum transmission power of the terminal device, M PSCCH represents the bandwidth of the control channel where the control signal comprised in the ithsidelink signal is located, M PSSCH represents the bandwidth of the sidelink data channel where the sidelink data signal comprised in the ithsidelink signal is located, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the receiving end of the ithsidelink signal, a PSSCH,3 represents a filtering parameter, and PLrepresents path loss.

[0132] In a possible implementation, PLsatisfies the following formula:

[0133] PL = min{PL UP , γ i * PL SL,j}; or,

[0134] PL = max{PL min , min{PL UL , γ i * PL SL,i}}; or,

[0135] PL = min{max{PL min , PL UL}, γ i * PL SL,i};

[0136] wherein PLUP denotes a path loss between the terminal device and a network device, γ i denotes a second power control factor of the ithsidelink signal, a value of the second power control factor being determined according to a priority of the ithsidelink signal, PL min denotes a first threshold of the path loss.

[0137] In a possible implementation, the processor is configured to determine the first transmission power of the ithsidelink signal according to the priorities of the at least two sidelink signals by:

[0138] determining the first transmission power of part of the at least two sidelink signals to be 0 until a sum of initial transmission powers of the sidelink signals whose initial transmission powers are not 0 is less than or equal to the maximum transmission power of the terminal device, the priorities of the part of the at least two sidelink signals being less than or equal to the priorities of the sidelink signals whose initial transmission powers are not 0.

[0139] As to the technical effects of the fifth aspect or the various possible implementations of the fifth aspect, reference can be made to the introduction of the technical effects of the first aspect or the corresponding implementation of the first aspect.

[0140] In a sixth aspect, a communication device, for example, the second communication device as described above, is provided. The second communication device includes a processor. Optionally, the second communication device can further include a transceiver. The processor and the transceiver are coupled to each other, and are configured to implement the method described in the second aspect or the various possible implementations. Optionally, the second communication device can further include a memory. The processor, the memory and the transceiver are coupled to each other, and are configured to implement the method described in the second aspect or the various possible implementations. Illustratively, the second communication device is a terminal device. Illustratively, the second communication device is a communication device, or a chip or other component provided in the communication device (if the second communication device is a terminal device, the terminal device can be an independently provided device, or can be a chip or other component provided in the communication device). Illustratively, the communication device is a terminal device. Hereinafter, the second communication device is taken as an example of a terminal device. If the second communication device is a communication device, the transceiver is implemented, for example, by an antenna, a feed line and a codec in the communication device. Or, if the second communication device is a chip or other component provided in the communication device, or the second communication device is a chip provided in the communication device, the transceiver is, for example, a communication interface in the chip, which is connected to a radio frequency transceiving component in the communication device to implement the transceiving of information through the radio frequency transceiving component. Wherein,

[0141] determine to simultaneously transmit an uplink signal on an uplink and transmit at least one sidelink signal on at least one sidelink;

[0142] determine, according to the first transmission power, the power boosting amount, and the second transmission power, a transmission power of an i-th sidelink signal in the at least one sidelink signal, the first transmission power being a transmission power of the uplink signal when the terminal device only transmits the uplink signal, the second transmission power being a transmission power of the uplink signal when the terminal device simultaneously transmits the uplink signal and the at least one sidelink signal, the power boosting amount representing an amount of boosting of a maximum transmission power of the terminal device when the terminal device simultaneously transmits the uplink signal and the sidelink signal relative to a case where the terminal device only transmits the uplink signal, i being an integer from 1 to N, N being a number of the at least one sidelink signal.

[0143] In a possible implementation, the total transmission power of the at least one sidelink signal satisfies the following formula:

[0144] ∑P SL ≤(1+λ)P1-P UL

[0145] wherein ∑P SL represents the total transmission power of the at least one sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, and P UL represents the second transmission power.

[0146] In a possible implementation, the processor is configured to determine, according to the first transmission power, the power boosting amount, and the second transmission power, the transmission power of the i-th sidelink signal in the at least one sidelink signal in the following manner:

[0147] determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal.

[0148] In a possible implementation, the processor is configured to determine, according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal, the transmission power of the i-th sidelink signal in the following manner:

[0149] the transmission power of a sidelink control signal included in the i-th sidelink signal satisfies the following formula:

[0150]

[0151] wherein P PSCCHrepresents the transmission power of the sidelink control signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P UL represents the second transmission power, M PSCCH represents the bandwidth of the sidelink control channel occupied by the sidelink control signal included in the first sidelink signal, M PSSCH represents the bandwidth of the sidelink data channel occupied by the sidelink data signal included in the first sidelink signal, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the reception end of the i-th sidelink signal, α PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0152] In a possible implementation, the processor is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal, by:

[0153] The transmission power of the sidelink data signal included in the i-th sidelink signal satisfies the following formula:

[0154]

[0155] wherein P PSsCH represents the transmission power of the sidelink data signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P UL represents the second transmission power, M PSCCH represents the bandwidth of the sidelink control channel occupied by the sidelink control signal included in the i-th sidelink signal, M PSSCH represents the bandwidth of the sidelink data channel occupied by the sidelink data signal included in the i-th sidelink signal, P OPSSCH,3 represents the reception power of the sidelink data signal expected by the reception end of the i-th sidelink signal, α PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0156] In a possible implementation, the processor is further configured to determine the second transmission power according to the first transmission power.

[0157] In a possible implementation, the processor is configured to determine the second transmission power according to the first transmission power, by:

[0158] The second transmission power satisfies the following formula:

[0159] P UL = min{P1, P OPUSCH + 10 log 10 (2u *M PUSCH )+ α · PL + ΔTF + δ} [dBm]

[0160] wherein, P UL denotes the second transmission power, P1denotes the first transmission power, M PUSCH denotes a bandwidth of a channel occupied by the uplink signal, denotes a reception power of the uplink signal expected by a receiving end corresponding to the uplink signal, PLdenotes path loss, a is a compensation parameter of uplink path loss, ΔTFis a parameter related to a modulation and coding mode, δ denotes a closed loop power control adjustment amount, and u denotes a subcarrier spacing of a subcarrier where the uplink signal is located.

[0161] As to the technical effects of the sixth aspect or the various possible implementation manners of the sixth aspect, reference can be made to the introduction of the technical effects of the second aspect or the corresponding implementation manners of the second aspect.

[0162] In a seventh aspect, a communication apparatus is provided. The communication apparatus can be the first communication apparatus in the method design. Exemplarily, the first communication apparatus is a chip arranged in a communication device. Exemplarily, the first communication apparatus is a terminal apparatus. Exemplarily, the communication device is a terminal device. The communication apparatus comprises a communication interface configured to perform transceiving of information, or in other words, configured to communicate with other apparatuses, and a processor coupled to the communication interface. Optionally, the communication apparatus can further comprise a memory configured to store computer executable program code. Alternatively, the communication apparatus can not comprise the memory, and the memory can be located outside the communication apparatus. The program code stored in the memory comprises instructions, and when the processor executes the instructions, the communication apparatus performs the method in the first aspect or any one of the possible implementation manners.

[0163] If the first communication apparatus is a communication device, the communication interface can be a transceiver in the first communication apparatus, for example, realized through an antenna, a feed line and a codec in the communication apparatus, etc. Alternatively, if the first communication apparatus is a chip arranged in a communication device, the communication interface can be an input / output interface of the chip, for example, an input / output pin, etc.

[0164] In an eighth aspect, a communication apparatus is provided. The communication apparatus can be a second communication apparatus in the method described above. For example, the second communication apparatus can be a chip arranged in a communication device. For example, the second communication apparatus can be a terminal apparatus. For example, the communication device can be a terminal device. The communication apparatus comprises a communication interface configured to receive and / or transmit information, i.e., configured to communicate with another apparatus; and a processor coupled to the communication interface. Optionally, the communication apparatus further comprises a memory configured to store computer executable program code. Alternatively, the communication apparatus can not comprise the memory, and the memory can be located outside the communication apparatus. The program code stored in the memory comprises instructions which, when executed by the processor, cause the communication apparatus to perform the method in the second aspect or any possible implementation of the second aspect.

[0165] If the second communication apparatus is a communication device, the communication interface can be a transceiver in the first communication apparatus, e.g., implemented by an antenna, a feed line, a codec, etc. in the communication apparatus. Alternatively, if the second communication apparatus is a chip arranged in a communication device, the communication interface can be an input / output interface of the chip, e.g., an input / output pin, etc.

[0166] In a ninth aspect, a communication system is provided. The communication system comprises the communication apparatus in the third aspect, the communication apparatus in the fifth aspect, or the communication apparatus in the seventh aspect; and / or the communication system comprises the communication apparatus in the fourth aspect, the communication apparatus in the sixth aspect, or the communication apparatus in the eighth aspect.

[0167] In a tenth aspect, a computer readable storage medium is provided. The computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the method in the first aspect or any possible implementation of the first aspect.

[0168] In an eleventh aspect, a computer readable storage medium is provided. The computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the method in the second aspect or any possible implementation of the second aspect.

[0169] In a twelfth aspect, a computer program product containing instructions is provided. The computer program product stores computer instructions which, when executed on a computer, cause the computer to perform the method in the first aspect or any possible implementation of the first aspect.

[0170] In a thirteenth aspect, a computer program product including instructions for storing computer instructions that, when executed on a computer, cause the computer to perform the method of the second aspect or any of the possible implementation forms of the second aspect.

[0171] The scheme provided by the embodiments of the present application provides a power control solution for the scenario in which a terminal device sends sidelink signals to multiple receiving terminals, and the success rate of sending sidelink signals is improved through power control. BRIEF DESCRIPTION OF DRAWINGS

[0172] Figure 1 An illustration of V2X;

[0173] Figure 2A An illustration of an application scenario of the embodiments of the present application;

[0174] Figure 2B An illustration of another application scenario of the embodiments of the present application;

[0175] Figure 3 An illustration of data channels and control channels included in a link in the embodiments of the present application;

[0176] Figure 4 A flowchart of the first communication method provided by the embodiments of the present application;

[0177] Figure 5 An illustration of resource occupation of at least two sidelinks when a first terminal device sends sidelink signals through the at least two sidelinks in the embodiments of the present application;

[0178] Figure 6 An illustration of interference to a network device caused by sending sidelink services;

[0179] Figure 7 A flowchart of the second communication method provided by the embodiments of the present application;

[0180] Figure 8 An illustration of resource occupation of an uplink and a sidelink when a first terminal device sends sidelink signals through the uplink and the sidelink in the embodiments of the present application;

[0181] Figure 9 An illustrative block diagram of the first terminal device provided by the embodiments of the present application;

[0182] Figure 10 Another illustrative block diagram of the first terminal device provided by the embodiments of the present application;

[0183] Figure 11a second terminal device provided by an embodiment of the present application;

[0184] Figure 12 a second terminal device provided by an embodiment of the present application;

[0185] Figure 13 a communication device provided by an embodiment of the present application;

[0186] Figure 14 a communication device provided by an embodiment of the present application;

[0187] Figure 15 a communication device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0188] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0189] In the following, some terms in the embodiments of the present application are explained so as to facilitate the understanding of the skilled in the art.

[0190] 1) terminal device, including a device that provides voice and / or data connectivity to a user, specifically, including a device that provides voice to a user, or including a device that provides data connectivity to a user, or including a device that provides voice and data connectivity to a user. For example, can include a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal device can communicate with a core network via a radio access network (RAN), exchange voice or data with the RAN, or interact voice and data with the RAN. The terminal device can include a user equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle to everything (V2X) terminal device, a machine-to-machine / machine-type communications (M2M / MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit, a subscriber station, a mobile station, a remote station, an access point (AP), a remote terminal, an access terminal, a user terminal, a user agent, or a user device, etc. For example, can include a mobile phone (or called "cellular" phone), a computer with a mobile terminal device, a portable, pocket, handheld, built-in computer mobile device, etc. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. Also include limited devices, such as low power consumption devices, or limited storage devices, or limited computing devices, etc. For example, information sensing devices such as bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanners, etc.

[0191] By way of example and not limitation, in embodiments of the present application, the terminal device can also be a wearable device. The wearable device can also be referred to as a smart wearable device or a smart wearable device, etc. It is a general term for devices that are designed and developed by applying wearable technology to daily wear, such as glasses, gloves, watches, clothing, and shoes. The wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. The wearable device is not only a hardware device, but also a powerful function realized through software support and data interaction, cloud interaction. The broad sense of wearable smart devices includes full-featured, large-sized devices that can realize complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and devices that focus on a certain application function and need to be used with other devices such as smart phones, such as various smart wristbands, smart helmets, smart jewelry, etc.

[0192] And various terminal devices as introduced above, if located on a vehicle (for example, placed in or installed in the vehicle), can be considered as vehicle-mounted terminal devices, which are also referred to as on-board units (OBU). The terminal device of the embodiments of the present application can also be an on-board module, an on-board module, an on-board component, an on-board chip or an on-board unit built in a vehicle as one or more components or units. The vehicle can implement the method of the present application through the built-in on-board module, on-board module, on-board component, on-board chip or on-board unit.

[0193] In embodiments of the present application, the terminal device can also include a relay. Or it can be understood that all devices capable of data communication with the base station can be regarded as terminal devices.

[0194] The terminal device can be a terminal device, or a module for implementing the function of the terminal device. The module can be provided in the terminal device, or can be provided independently of the terminal device. The module is, for example, a chip system, etc.

[0195] 2) Network equipment, including access network (AN) equipment such as base stations (e.g., access points), can refer to devices in the access network that communicate with wireless terminal devices over the air interface via one or more cells, or, for example, network equipment in a vehicle-to-everything (V2X) technology as a roadside unit (RSU). Base stations can be used to convert received air frames to and from IP packets, acting as routers between terminal devices and the rest of the access network, which may include an IP network. The RSU can be a fixed infrastructure entity supporting V2X applications and can exchange messages with other entities supporting V2X applications. Network equipment can also coordinate the management of air interface attributes. For example, network equipment can include evolved base stations (NodeBs, eNBs, or e-NodeBs) in long-term evolution (LTE) systems or long-term evolution-advanced (LTE-A) systems, or it can also include fifth-generation mobile communication technologies (the 5G). th The next generation node B (gNB) in a 5G new radio (NR) system (also referred to as the NR system) or a centralized unit (CU) and a distributed unit (DU) in a cloud radio access network (Cloud RAN) system are not limited to this embodiment.

[0196] Of course, network devices may also include core network devices, but since the technical solutions provided in this application mainly involve access network devices, unless otherwise specified, the "core network device" described below refers to the core network device, while the "network device" or "access network device" described below refers to the access network device.

[0197] 3) V2X is the interconnection between vehicles and the outside world, which is the foundation and key technology for future intelligent vehicles, autonomous driving, and intelligent transportation systems. V2X will optimize the specific application requirements of V2X based on existing device-to-device (D2D) technology, and further reduce the access latency of V2X devices and resolve resource conflict issues.

[0198] V2X includes several application requirements, such as direct communication between vehicles (vehicle-to-vehicle, V2V), between vehicles and roadside infrastructure (vehicle-to-infrastructure, V2I), between vehicles and pedestrians (vehicle-to-pedestrian, V2P), and between vehicles and networks (vehicle-to-network, V2N). As shown in FIG. 1. Figure 1 V2V refers to communication between vehicles; V2P refers to communication between a vehicle and a person (including a pedestrian, a cyclist, a driver, or a passenger); V2I refers to communication between a vehicle and a network device, such as an RSU; and V2N, which can be included in V2I, refers to communication between a vehicle and a base station / network.

[0199] V2P can be used to provide safety warnings to pedestrians or non-motorized vehicles on the road. Through V2I, a vehicle can communicate with the road and even other infrastructure, such as traffic lights, roadblocks, etc., to obtain road management information such as traffic light timing. V2V can be used for information exchange and reminders between vehicles, and the most typical application is for a vehicle-to-vehicle collision avoidance safety system. V2N is the most widely used form of vehicle networking, and its main function is to enable vehicles to connect to a cloud server through a mobile network and use the navigation, entertainment, or anti-theft application functions provided by the cloud server.

[0200] In V2X, the main communication is between terminal devices. For the transmission mode between terminal devices, the current standard protocol supports broadcast mode, groupcast mode, and unicast mode.

[0201] Broadcast mode: In broadcast mode, the terminal device as a sending end adopts a broadcast mode to send data, and multiple terminal devices can receive sidelink control information (SCI) or a sidelink shared channel (SSCH) from the sending end.

[0202] In sidelink, the way to ensure that all terminal devices can parse the control information from the sending end is that the sending end does not scramble the control information, or the sending end uses a scrambling code known to all terminal devices to scramble the control information.

[0203] Groupcast mode: The groupcast mode is similar to broadcast transmission, and the terminal device as a sending end adopts a broadcast mode to send data, and a group of terminal devices can parse SCI or SSCH.

[0204] Unicast mode: Unicast mode is that one terminal device sends data to another terminal device, and other terminal devices do not need or cannot analyze the data.

[0205] 4) Sidelink refers to a link between terminal devices. Uplink refers to a link between a terminal device and a network device.

[0206] 5) The terms "system" and "network" in the embodiments of the present application can be used interchangeably. "At least one" means one or more, and "multiple" means two or more. "And / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent: A exists alone, A and B exist together, B exists alone, and A, B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions means any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b, or c can represent a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0207] In addition, unless otherwise stated, the ordinal numbers mentioned in the embodiments of the present application are used to distinguish a plurality of objects, and are not used to limit the order, time sequence, priority or importance of the plurality of objects. For example, the first power control factor and the second power control factor are only used to distinguish different power control factors, and do not necessarily mean that the contents, priorities or importance of the two power control factors are different.

[0208] As introduced above, some concepts related to the embodiments of the present application are introduced, and the technical features of the embodiments of the present application are introduced below.

[0209] Wireless communication technology has experienced rapid development in the past few decades, and has successively experienced the first generation of wireless communication system based on analog communication system, the second generation (2G) wireless communication system represented by global system for mobile communication (GSM), the third generation (3G) wireless communication system represented by wideband code division multiple access (WCDMA), and the fourth generation (4G) wireless communication system represented by long term evolution (LTE) which has been widely used and achieved great success in the world. The services supported by the wireless communication system have also developed from the initial voice or short message to the current wireless high-speed data communication. At the same time, the number of wireless connections worldwide is experiencing a sustained high growth, and various new types of wireless services are emerging in large numbers, such as the Internet of Things, autonomous driving, etc., which puts forward higher requirements for the next generation wireless communication system, i.e. the fifth generation (5G) system.

[0210] User cooperation is one of the main features supported by the next generation communication system, which can significantly improve the capacity and coverage of the system, and at the same time can reduce the load of the base station. User cooperation includes uplink cooperation process and downlink cooperation process, and the embodiments of the present application mainly relate to the uplink cooperation process. A typical scenario of uplink cooperation process is shown in Figure 2A Specifically, the source user equipment (SUE) can send part or all of the uplink signals to be sent to the network device. In addition, if the SUE sends part of the information in the uplink data to be sent to the network device, the SUE can also send the remaining information in the uplink signal to be sent to the relevant cooperation user equipment (CUE), for example Figure 2A The CUE can send the received uplink signal from the SUE to the network device. The SUE and the CUE can communicate through the sidelink. In this way, the network device can jointly decode the received uplink signal from the SUE and the uplink signal from the CUE, thereby improving the reception performance. In this case, the SUE will send the uplink signal and the sidelink signal for this scenario.

[0211] In addition, there is another typical scenario of uplink cooperation, which can be referred to Figure 2B In this scenario, the SUE does not send uplink signals to the network device (for example, the SUE is out of the coverage of the cell, or the channel quality of the SUE is too poor, etc.), and completely relies on the CUE to forward the uplink signals from the SUE to the network device, and the SUE and the CUE can communicate through the sidelink. In this case, for this scenario, the SUE only sends the sidelink signals.

[0212] In the uplink cooperation process, the SUE and several CUEs serving it can form a user cooperation group, for example Figure 2A Or Figure 2B The SUE, the CUE1 and the CUE2 in the above belong to a user cooperation group. For a UE, it can be a SUE of a user cooperation group centered on itself, and also can be a CUE of one or more other user cooperation groups. In the same cell, there can be multiple different user cooperation groups.

[0213] The power control mechanism of LTE-V2X is introduced below.

[0214] LTE-V2X mainly faces the type of broadcast message, so the terminal device of the V2X receiving end is uncertain, and all interested V2X terminal devices can be in a listening state, so the terminal device as the sending end generally sends the sidelink signals with the maximum possible sending power. At the same time, in the scenario with network coverage, the LTE-V2X information is sent in the uplink time slot, so the influence of the V2X sending power on the uplink reception of the base station needs to be considered. As shown in Figure 3 On the time-frequency resource of one transmission, the control channel and the data channel are multiplexed in a frequency division manner, and from the time domain, the control channel and the data channel are in a coexistence relationship. Therefore, the sending power of the control channel and the data channel needs to be considered together. LTE-V2X has two modes, a base station scheduling mode and a contention mode. Among them, the base station scheduling mode means that the resource for the terminal device to send the sidelink signals is scheduled by the base station; the contention mode means that the resource for the terminal device to send the sidelink signals is selected by the terminal device from the pre-configured resource pool, without the need for base station scheduling.

[0215] For the base station scheduling mode, the physical sidelink shared channel (PSSCH) and the physical sidelink control channel (PSCCH) each have a corresponding formula for power control.

[0216] The power control formula of the PSSCH is as follows:

[0217]

[0218] wherein P PSSCH denotes the transmit power of PSSCH. M PSSCH denotes the bandwidth of PSSCH. P CMAX denotes the maximum transmit power allowed for the current terminal device. PLdenotes the downlink power loss estimated by the current terminal device as the transmitter, and it is generally considered that the uplink and downlink losses are consistent in the communication system, especially in the time division duplexing (TDD) system, so this parameter is used to calculate the possible link loss from the current terminal device to the base station. P O_PSSCH,3 denotes the power of PSSCH expected to be received by the receiver. a PSSCH,3 is the filtering parameter configured for the current mode (as the current mode is the mode scheduled by the base station, it is mode 3). In addition, P PSSCH has the unit of dBm.

[0219] The power control formula of PSCCH is formula 2 as follows:

[0220]

[0221] wherein P PSCCH denotes the transmit power of PSCCH. M PSCCH denotes the bandwidth of PSCCH. Other parameters of formula 2 can be referred to the related introduction of formula 1. P PSCCH has the unit of dBm.

[0222] In addition, formula 1 can be changed to formula 3 as follows:

[0223]

[0224] Formula 2 can be changed to formula 4 as follows:

[0225]

[0226] Both formula 3 and formula 4 include two sub-terms (the first term before the comma and the second term after the comma), wherein the first term denotes the maximum transmit power allocated to the current channel. It can be found from the first term that the maximum transmit power allocated to PSCCH and PSSCH is proportional to the bandwidth of the channel itself, and compared with PSSCH, the transmit power of each sub-carrier of PSCCH has The first term in the formula represents the total transmission power allowed by the current terminal device hardware, which is proportionally allocated to PSCCH and PSSCH according to the bandwidth size. The second term in the formula represents the link budget calculated according to the link loss of the Uu interface and the expected signal-to-noise ratio (SNR) to be achieved, i.e., the expected transmission power of the link, which sets the channel transmission power according to the bandwidth size to meet the specified link performance. The final channel transmission power takes the minimum value of the first term and the second term, i.e., when the transmission power allowed by the hardware of the terminal device is large enough, it is transmitted according to the link requirement, and when the transmission power allowed by the hardware of the terminal device is less than the link requirement, it is transmitted according to the maximum power allowed by the hardware.

[0227] The above formulas 1-4 apply to the mode of base station scheduling. For the contention mode, there are other power control methods.

[0228] In the contention mode, the power control formula of PSSCH is as follows:

[0229]

[0230] The system can define the maximum transmission power P MAX_CBR in the subchannel according to the busy degree of the current subchannel. If the number of terminal devices on the subchannel is large, in order to reduce the collision probability, the transmission power of each terminal device in the subchannel can be reduced, and vice versa. When the system configures P MAX_CBR , the definition of parameter A in formula 5 can refer to formula 6:

[0231]

[0232] Wherein, M PSSCH represents the bandwidth of PSSCH. M PSCCH represents the bandwidth of PSCCH. P CMAX represents the maximum transmission power allowed by the current terminal device. PL represents the downlink power loss estimated by the current terminal device as the transmitting end. In the communication system, especially in the time division duplexing (TDD) system, it is generally considered that the loss of uplink and downlink is consistent, so this parameter is used to calculate the possible link loss from the current terminal device to the base station. P O_PSSCH,4 represents the power of PSSCH expected to be received by the receiving end. a PSSCH,4 is the filtering parameter configured in the current mode (because the current mode is the contention mode, so it is mode 4).

[0233] If there is no limit on the subchannel transmission power, the definition of parameter A can refer to formula 7:

[0234]

[0235] For information on the parameters in Formula 7, please refer to the description of the parameters in Formula 6.

[0236] The above describes the power control mechanism in LTE-V2X. NR systems also have a corresponding uplink power control mechanism.

[0237] In the NR system, the power control formula for PUSCH is as follows: Formula 8:

[0238] P PUSCH =min{P CMAX ,P OPUSCH +10log 10 (2 u *M PUSCH )+α·PL+△TF+δ} (Formula 8)

[0239] Among them, P PUSCH This indicates the transmit power of PUSCH. This represents the power that the receiver expects to receive. M PUSCH This indicates the bandwidth of PUSCH. P CMAX PL represents the maximum allowable transmit power of the current (transmitting) terminal device, and PL represents the estimated downlink power loss of the current terminal device. α represents the compensation parameter for uplink path loss configured in the current mode. △TF represents parameters related to the modulation and coding scheme. δ represents the closed-loop power control adjustment amount, which is transmitted by the base station in each slot via downlink control information (DCI). P PUSCH The unit is dBm.

[0240] The LTE-V2X power control method described above is only applicable to scenarios where one terminal device sends side-link signals to another terminal device. If a terminal device needs to send side-link signals to multiple terminal devices, this power control method is no longer applicable. Similarly, the NR system power control method described above is only applicable to scenarios where the terminal device sends uplink signals. If the terminal device sends both uplink and side-link signals simultaneously, this power control method is no longer applicable. Likewise, if the terminal device sends both uplink and side-link signals simultaneously, the LTE-V2X power control method described above is no longer applicable.

[0241] In view of this, the technical solutions of the embodiments of the present application are provided. In the embodiments of the present application, if the sum of the transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device, the terminal device can determine the transmission powers of the at least two sidelink signals (that is, determine the first transmission powers of the at least two sidelink signals) according to the priorities of the at least two sidelink signals. For example, after the transmission powers are re-determined, the sum of the transmission powers of the at least two sidelink signals can be less than or equal to the maximum transmission power of the terminal device, so that the total transmission power of the terminal device when transmitting the sidelink signals is controlled within the capability range of the terminal device, and the terminal device can transmit the sidelink signals. The scheme provided in the embodiments of the present application provides a power control solution for the scenario in which the terminal device transmits sidelink signals to multiple receiving ends. Through the power control manner, the transmission success rate of the sidelink signals is improved. Moreover, the terminal device can re-determine the transmission powers of the sidelink signals according to the priorities of the at least two sidelink signals. For example, for the sidelink signal with a higher priority, the transmission power of the sidelink signal can be kept consistent with the transmission power before the re-determination, or the difference can be small, so that the high-priority service can be transmitted as much as possible.

[0242] The technical solutions provided in the embodiments of the present application can be applied to a user cooperation scenario, for example, an uplink cooperation scenario, or can be applied to other scenarios. In addition, the technical solutions provided in the embodiments of the present application can be applied to an LTE system, or an NR system, or a next-generation mobile communication system or other similar communication system. Alternatively, the technical solutions provided in the embodiments of the present application can be applied to a V2X scenario, for example, LTE-V2X or NR-V2X, or other V2X scenarios.

[0243] The network architecture to which the embodiments of the present application are applied will be introduced below. Taking the case that the embodiments of the present application are applied to an uplink cooperation scenario, Figure 2A or Figure 2B can be used as the network architecture to which the embodiments of the present application are applied. Among them, Figure 2A or Figure 2B The network device in or is, for example, an access network device, for example, a base station. Among them, the access network device corresponds to different devices in different systems, for example, in a 4G system, it can correspond to an eNB, in a 5G system, it can correspond to an access network device in 5G, for example, a gNB, or in a subsequent evolved communication system, it can correspond to other corresponding access network devices.

[0244] Among them, Figure 2A or Figure 2B The terminal device in or is taken as an example of a mobile phone, but the terminal device in the embodiments of the present application is not limited thereto.

[0245] Next, the technical solutions provided in the embodiments of the present application will be introduced in combination with the drawings.

[0246] The embodiment of the present application provides a communication method, please refer to Figure 4 , which is a flowchart of the method. In the following introduction process, the network architecture shown in Figure 2A or Figure 2B is taken as an example. In addition, the method can be executed by three or more communication devices, one of which is a sending end of the sidelink signal, and the remaining communication devices are receiving ends of the sidelink signal. For example, the communication device as the sending end of the information is referred to as a first communication device, and the communication devices as the receiving end of the information are all referred to as second communication devices. Among them, the first communication device or the second communication device can be a network device or a communication device capable of supporting the network device to realize the functions required by the method, or can be a terminal device or a communication device capable of supporting the terminal device to realize the functions required by the method, and of course can also be other communication devices, such as a chip system. And the implementation mode of the first communication device or the second communication device is not limited, for example, the two communication devices can be implemented in the same form, for example, both are implemented in the form of a device, or the two communication devices can also be implemented in different forms, for example, the first communication device is implemented in the form of a device, and the second communication device is implemented in the form of a chip system, and the implementation forms of different second communication devices can be the same or different, and the like. Among them, the network device is, for example, a base station.

[0247] In order to facilitate the introduction, in the following, the method executed by the terminal device and the terminal device is taken as an example, that is, the first communication device is a terminal device (for example, referred to as a first terminal device), and the second communication device is also a terminal device (for example, referred to as a second terminal device). Because the embodiment is taken as an example applied to the network architecture shown in Figure 2A or Figure 2B , for example, the first terminal device described below can realize the function of the SUE in the network architecture shown in Figure 2A or Figure 2B , and the second terminal device described below can realize the function of the CUE in the network architecture shown in Figure 2A or Figure 2B .

[0248] S41, the first terminal device determines the initial transmission power of each of the at least two sidelink signals.

[0249] The embodiment of the present application can be applied to the scenario of concurrent multiple sidelink signals of the same terminal device. The resource occupation of the first terminal device in the concurrent multiple sidelink signals can be referred to Figure 2A . It can be seen that in the same time slot, the first terminal device needs to send multiple sidelink signals, or in other words, the first terminal device needs to send the sidelink signals on multiple sidelinks, Figure 2BSL_1, SL_2, SL_3, etc. in the above formula represent different sidelinks. At least two sidelinks can be transmitted to the same receiving end, for example, both are transmitted to the same second terminal device, or can be transmitted to multiple receiving ends, for example, transmitted to multiple second terminal devices, wherein the number of at least two sidelinks is greater than or equal to the number of corresponding second terminal devices.

[0250] The first terminal device transmits at least two sidelinks on at least two sidelinks, and the first terminal device can first calculate the transmission power of each sidelink in at least two sidelinks, or it can be considered that the first terminal device calculates the transmission power of each sidelink in at least two sidelinks. That is, in the embodiment of the present application, it can be considered that the sidelink and the sidelink are one-to-one, and the transmission power of the sidelink and the sidelink is calculated, and the calculation result can be the same. At this time, the first terminal device is normally calculating the transmission power of at least two sidelinks, and has not performed power control, so the transmission power of the sidelink calculated can be called the initial transmission power of the sidelink. The first terminal device calculates the initial transmission power of each sidelink in at least two sidelinks in a similar manner, so below the first terminal device calculates the initial transmission power of the i-th sidelink. The i-th sidelink can be any one of the at least two sidelinks. i can be an integer from 1 to N, and N is the number of at least two sidelinks.

[0251] The initial transmission power of the i-th sidelink can satisfy the following formula:

[0252] P SLj,i =P PSCCH,i +P PSSCH,i (Formula 9)

[0253] Wherein, a sidelink can include at least one sidelink control channel, and can include at least one sidelink data channel, which can be referred to in Figure 8 , Figure 8 It can be considered that the whole is a sidelink. Therefore, the initial transmission power of a sidelink can be the sum of the initial transmission power of the control channel and the initial transmission power of the data channel. Or understand that a sidelink can include a sidelink control signal, or include a sidelink data signal, or include a sidelink control signal and a sidelink data signal. Therefore, the initial transmission power of a sidelink can be the sum of the initial transmission power of the sidelink control signal and the initial transmission power of the sidelink data signal included in the sidelink. PSSCH,i It can be understood that the initial transmission power of the sidelink data signal included in the i-th sidelink is P PSCCH,iIt can be understood that the initial transmission power of the sidelink control signal included in the ith sidelink signal. The sidelink control channel can be PSCCH, and the data channel can be PSSCH. In addition, there is also the concept of a subchannel, for example, one sidelink data channel and one sidelink control channel can constitute a subchannel, for example Figure 8 subchannel as indicated in formula 8.

[0254] P PSSCH,i may satisfy the following formula 10:

[0255]

[0256] wherein M PSSCH represents the bandwidth of the sidelink data channel in which the sidelink data signal included in the ith sidelink signal is located, and the data channel is, for example, PSSCH. M PSCCH represents the bandwidth of the sidelink control channel in which the sidelink control signal included in the ith sidelink signal is located, and the sidelink control channel is, for example, PSCCH. P CMAX represents the maximum transmission power allowed by the first terminal device. PL represents the downlink power loss estimated by the first terminal device. In a communication system, especially in a TDD system, it is generally considered that the uplink and downlink losses are consistent, so this parameter is used to calculate the possible link loss of the first terminal device to the network device. P O_PSSCH,3 represents the power of the PSSCH expected to be received by the second terminal device corresponding to the ith sidelink signal (i.e., the receiving end of the ith sidelink signal). α PSSCH,3 is a filtering parameter configured in the current mode (e.g., mode 3). min(a, b) represents the minimum value of a and b.

[0257] P PSCCH,i may satisfy the following formula 11:

[0258]

[0259] For the parameters in formula 11, refer to the introduction of the parameters of formula 10.

[0260] The first terminal device calculates P PSCCH,i and P PSSCH,i Then, the initial transmission power of the ith sidelink signal can be obtained.

[0261] In formula 10 and formula 11, PL is involved. Among them, α PSSCH,3 · PL can be called link budget, which needs to be compensated in the power control process of the terminal device. In the case where the maximum transmission power of the terminal device is not reached, the larger the link budget, the higher the transmission power of the terminal device.

[0262] Currently, the link budget is calculated according to the link of the Uu port, and the purpose is to make the sidelink signal have the maximum transmission power on the basis of not affecting the uplink channel reception of the network device side for broadcast information. For example, the service model of NR V2X can support unicast and multicast modes. In the NR V2X scenario, the transmission end of the sidelink signal can send a message to the reception end of the sidelink signal, the reception end of the sidelink signal measures according to the received message to obtain a measurement result, and the reception end of the sidelink signal sends the measurement result to the transmission end of the sidelink signal. The measurement result includes, for example, reference signal receiving power (RSRP) or signal to noise ratio (SNR) information. Then, based on the above assumptions, the transmission end of the sidelink signal can calculate the link budget of the link between the transmission end and the reception end of the sidelink signal according to the obtained measurement result, and can perform power control based on the link budget.

[0263] For example, for unicast mode, the link loss between the transmission end of the sidelink service and the reception end of the sidelink service in the unicast scenario is defined as PL SL , which can be referred to in Figure 8 . Figure 6 In the embodiment, the first terminal device is the transmission end of the sidelink service, and the second terminal device is the reception end of the sidelink service. Considering the scenario of network device coverage, even if the terminal device transmits the sidelink signal on the sidelink, the interference to the network device still needs to be considered. It is assumed that the link loss from the transmission end of the sidelink service to the network device is represented as PL UP , which can be referred to in Figure 9 .

[0264] In the embodiment, as an optional mode, a second power control factor, for example, denoted by γ i , can be introduced. For example, the power control factor γ i may be designed according to the priority of the service. The higher the priority of one sidelink signal is, the greater the value of the second power control factor corresponding to the sidelink carrying the sidelink signal is. For example, 0 < γ i ≤ 1.

[0265] For example, the PL corresponding to the i th sidelink signal can satisfy the following formula:

[0266] PL = min{PL UP , γ i *PL SL,i} (formula 12)

[0267] That is, the link budget can take the minimum value of the sidelink transmission loss modified by the second power control factor and the transmission loss from the first terminal device to the Uu port. In formula 12, PL SL,i represents the link loss of the ith sidelink, PL UP represents the link loss from the first terminal device to the network device.

[0268] Embodiments of the present application redefine the size of the path loss from the perspective of improving the system total throughput and reducing interference. The link loss is recalculated, not only considering the influence of the sidelink transmission power on the uplink channel, but also considering the link budget required by the sidelink itself, so that the link loss is more accurate.

[0269] In formula 12, the minimum value of the two items is taken. Then it is very likely that the calculated link budget will be relatively small, so that the transmission power of the first terminal device is insufficient, causing the second terminal device to be unable to correctly receive the sidelink signal from the first terminal device. Therefore, as an optional way, the present application embodiment can also further improve the link budget. For example, the PL corresponding to the ith sidelink signal can satisfy the following formula 13:

[0270] PL = max{PL min , min{PL UL , γ i *PL SL,i} (formula 13)

[0271] wherein, PL min represents the minimum threshold of the link transmission loss, for example, a first threshold, PL min can be configured by the network device, or specified by the protocol, or determined by the first terminal device.

[0272] In formula 13, by setting PL min , so that PL is greater than or equal to PL min , it can prevent the value of PL from being too small.

[0273] Or, considering that the actual link budget of some sidelinks is indeed relatively small, in order to make the calculated link budget more accurate, the PL corresponding to the ith sidelink signal can also satisfy the following formula 14:

[0274] PL = min{max{PL min , PL UL}, γ i *PL SL,i} (formula 14)

[0275] wherein, γ i *PL SL,iThe i-th sidelink signal corresponds to the actual link budget (i.e., the actual link budget of the sidelink carrying the i-th sidelink signal).

[0276] Formula 13 or Formula 14 is a further modification to the link budget, introducing PL min , and redesigning the calculation of the link budget to prevent the link budget of the sidelink from being too small and to ensure that the second terminal device can normally receive the sidelink signal from the first terminal device.

[0277] S42, the sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the first terminal device, and the first terminal device determines the first transmission power of the i-th sidelink signal in the at least two sidelink signals according to the priority of the at least two sidelink signals. As introduced above, i is an integer from 1 to N, and N is the number of the at least two sidelink signals. Wherein, i is an integer from 1 to N, which can be understood as taking i as an integer from 1 to N respectively, or in other words, the value of i is an integer from 1 to N respectively.

[0278] After obtaining the initial transmission power of each sidelink signal, the first terminal device can obtain the total initial transmission power of the at least two sidelink signals. As introduced in S41, the first terminal device can calculate the initial transmission power of the i-th sidelink signal according to Formula 9-Formula 11, then the first terminal device can calculate the initial transmission power of each sidelink signal in the at least two sidelink signals in a similar manner, and the first terminal device adds the initial transmission power of the at least two sidelink signals calculated to obtain the total initial transmission power of the at least two sidelink signals. For example, the total initial transmission power of the at least two sidelink signals is represented as ∑P SL,i , i = 1, 2, 3, …, and the maximum value of i is N, N being the number of the at least two sidelink signals.

[0279] After obtaining ∑P SL,i , the first terminal device can determine whether ∑P SL,i is greater than P CMAX . If ∑P SL,i is less than or equal to P CMAX , the first terminal device can normally transmit the at least two sidelink signals on the at least two sidelinks according to the calculated initial transmission power, wherein the first terminal device transmits the i-th sidelink signal on the i-th sidelink according to the initial transmission power of the i-th sidelink signal. If ∑P SL,i is greater than P CMAX , the first terminal device cannot obtain the support of the capability of the first terminal device if it transmits the at least two sidelink signals on the at least two sidelinks according to the calculated initial transmission power. Therefore, in this case, the first terminal device can take further measures.

[0280] For example, if ∑P SL,i is greater than P CMAX , the first terminal device can employ other manners to re-determine the transmission power of the at least two sidelink signals, for example, the re-determined transmission power is referred to as first transmission power. For example, the sum of the determined first transmission power of the at least two sidelink signals can be made less than or equal to P CMAX , so that the first terminal device can transmit the at least two sidelink signals on the at least two sidelinks according to the first transmission power of the at least two sidelink signals. Wherein, the first terminal device can transmit the ith sidelink signal on the ith sidelink according to the first transmission power of the ith sidelink signal.

[0281] As an optional manner, the first terminal device can determine the first transmission power of the at least two sidelink signals according to the priority of the at least two sidelink signals. The sidelink signal is, for example, described as a sidelink bearer service, that is, the first terminal device can determine the transmission power of the corresponding sidelink (or the transmission power of the sidelink signal) according to the priority of the sidelink service.

[0282] The first terminal device determines the first transmission power of the at least two sidelink signals according to the priority of the at least two sidelink signals, and there can be different implementation manners, which are introduced below.

[0283] 1. The first implementation manner.

[0284] The first terminal device determines the first transmission power of the at least two sidelink signals according to the first power control factor corresponding to the at least two sidelink signals respectively, wherein the value of the first power control factor is determined according to the priority of the sidelink signal.

[0285] In the first implementation manner, the first power control factor can be designed according to the priority of the service, for example, the first power control factor of the ith sidelink signal is represented as λ i . Wherein, λ i is a parameter acting on power, and γ i is a parameter acting on loss, and the two are different parameters. If the priority of a sidelink signal is higher, the value of the first power control factor corresponding to the sidelink signal is larger. For example, the first power control factor corresponding to the jth sidelink signal is represented as λ j , then if the priority of the ith sidelink signal is higher than the priority of the jth sidelink signal, λ i ≥ λ jThe first power control factor can be configured by the network device to the first terminal device, or be specified by a protocol, or be configured by the second terminal device to the first terminal device, or be configured by the first terminal device itself.

[0286] For example, the first terminal device determines the first transmission power of the ithsidelink signal according to the following formula:

[0287] P′ SLj,i = P CMAX + 10lg{(∑λ i * P SLj,i ) / ∑P i * P SLj,i} (Formula 12)

[0288] P′ SLj,i represents the first transmission power of the ithsidelink signal determined by the first terminal device, and ∑λ i represents the sum of the values of the at least two first power control factors corresponding to the at least two sidelink signals. The calculation method of ∑P SL,i can be referred to the foregoing.

[0289] The first terminal device can determine the first transmission power of each sidelink signal in the at least two sidelink signals according to Formula 12. The sum of the transmission powers of the at least two sidelink signals thus determined can be less than or equal to P CMAX , so that the first terminal device can transmit the at least two sidelink signals on the at least two sidelinks according to the first transmission powers of the at least two sidelink signals. The terminal device transmits the ithsidelink signal on the ithsidelink according to the first transmission power of the ithsidelink signal, that is, the first transmission power, the sidelink, and the sidelink signal are in one-to-one correspondence. Moreover, the terminal device can determine the first transmission power according to the priority of the sidelink signal. For the sidelink signal with a higher priority, the determined first transmission power can be larger, and for the sidelink signal with a lower priority, the determined first transmission power can be smaller. In this way, the transmission success rate of the sidelink signal with a higher priority can be improved as much as possible.

[0290] 2. The second implementation manner.

[0291] The first terminal device determines the first transmission power of part of the at least two sidelink signals to be 0, until the sum of the initial transmission powers of the sidelink signals with the remaining initial transmission power not being 0 is less than or equal to the maximum transmission power of the first terminal device. The initial transmission power of the sidelink signal with the remaining initial transmission power not being 0 can also be regarded as the first transmission power of the sidelink signal.

[0292] In the second implementation, if the first terminal device determines that the total initial transmission power of the at least two sidelink signals is greater than P CMAX , the first terminal device can abandon the transmission of sidelink signals with low priority in order according to the priority of the sidelink signals until the total initial transmission power of the at least two sidelink signals is less than or equal to P CMAX . In the process of abandonment, if there are multiple sidelink signals with the same priority and the priority is low and needs to be abandoned, the first terminal device can abandon all the multiple sidelink signals, or the first terminal device can abandon the sidelink signals with high transmission power in the multiple sidelink signals in order, or the first terminal device can randomly select one or more sidelink signals in the multiple sidelink signals to abandon.

[0293] Abandoning (or referred to as abandoning transmission) a sidelink signal by the first terminal device can be understood as that the first terminal device does not transmit the sidelink signal, for example, the first terminal device can set the transmission power of the sidelink signal to 0, and then the first terminal device does not transmit the sidelink signal. The first terminal device not transmitting a sidelink signal means that the first terminal device does not transmit the sidelink signal at the first time, and the first time is the time determined by the first terminal device to transmit the at least two sidelink signals on the at least two sidelink. Specifically, the first terminal device can directly discard the sidelink signal and does not transmit the sidelink signal after the first time; or the first terminal device can transmit the sidelink signal after the first time to improve the success rate of service transmission, and the specific implementation is not limited.

[0294] For example, the number of the at least two sidelink signals is 5, and the at least two sidelink links carrying the at least two sidelink signals are SL1, SL2, SL3, SL4 and SL5. The first terminal device determines to transmit the five sidelink signals on the five sidelink links at the first time. The first terminal device can determine the total initial transmission power of the five sidelink signals, and the determination manner can refer to the formula introduced in the foregoing. For example, the first terminal device determines that the total initial transmission power of the five sidelink signals is greater than the maximum transmission power P CMAX, the first terminal device can select and discard a sidelink signal according to the priority of the sidelink signal. For example, the priorities of the five sidelink signals are in descending order as follows: the priority of the sidelink signal 1 carried by SL1 > the priority of the sidelink signal 2 carried by SL2 > the priority of the sidelink signal 5 carried by SL5 = the priority of the sidelink signal 3 carried by SL3 > the priority of the sidelink signal 4 carried by SL4. Then the first terminal device can discard the sidelink signal 4 carried by SL4, that is, the first terminal device sets the first transmission power of the sidelink signal 4 to 0, or in other words, the first terminal device does not transmit the sidelink signal 4 on SL4 at the first time. After discarding the sidelink signal 4, the first terminal device can determine the total initial transmission power of the remaining sidelink signals 1, 2, 3 and 5 carried by SL1, SL2, SL3 and SL5, respectively, if the total initial transmission power of the four sidelink signals is less than or equal to P CMAX , the first terminal device can transmit the four sidelink signals on the four sidelink links at the first time according to the calculated initial transmission powers of the four sidelink signals, wherein the first terminal device transmits the sidelink signal 1 on SL1 according to the initial transmission power of the sidelink signal 1, transmits the sidelink signal 2 on SL2 according to the initial transmission power of the sidelink signal 2, transmits the sidelink signal 3 on SL3 according to the initial transmission power of the sidelink signal 3, and transmits the sidelink signal 5 on SL5 according to the initial transmission power of the sidelink signal 5 at the first time.

[0295] Or, if the total initial transmission power of the four sidelink signals is greater than P CMAX , the first terminal device can continue to discard the sidelink signal with the lowest priority. The sidelink signals with the lowest priority are the sidelink signal 5 carried by SL5 and the sidelink signal 3 carried by SL3, that is, the priorities of the two sidelink signals are the same and are the lowest. In this case, the first terminal device can discard the sidelink signal 5 carried by SL5 and the sidelink signal 3 carried by SL3, that is, the first terminal device sets the first transmission power of the sidelink signal 5 and the sidelink signal 3 to 0, or in other words, the first terminal device does not transmit the sidelink signal 5 on SL5 and does not transmit the sidelink signal 3 on SL3 at the first time. After discarding the sidelink signal 5 and the sidelink signal 3, the first terminal device can determine the total initial transmission power of the remaining sidelink signals 1 and 2, if the total initial transmission power of the two sidelink signals is less than or equal to P CMAX , the first terminal device can transmit the sidelink signal 1 on SL1 according to the initial transmission power of the sidelink signal 1 and transmit the sidelink signal 2 on SL2 according to the initial transmission power of the sidelink signal 2 at the first time. If the total initial transmission power of the two sidelink signals is greater than P CMAXIf the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P

[0296] Or, if the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P

[0297] Or, if the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P CMAX If the total initial transmission power of the sidelink signal 1, the sidelink signal 2, the sidelink signal 3 and the sidelink signal 5 is greater than P

[0298] There is a special case, if the first terminal device finally discards to only one sidelink signal, and the sidelink signal has a first transmission power still greater than P CMAX , the first terminal device can discard the sidelink signal, that is, the first terminal device does not transmit at least two sidelink signals. Or in this case, the first terminal device can also transmit the sidelink signal according to a second transmission power, the second transmission power is less than or equal to P CMAX , so as to ensure that the sidelink signal is transmitted as much as possible.

[0299] Of course, in addition to the above two implementation manners, the first terminal device can also have other implementation manners to determine the first transmission power of the at least two sidelink signals according to the priority of the at least two sidelink signals, and the specific implementation manner is not limited. As for which implementation manner the first terminal device will adopt to determine the first transmission power of the at least two sidelink signals, it can be configured by the network device, or specified by the protocol, or determined by the first terminal device itself, or determined by the first terminal device and the second terminal device, etc.

[0300] S43, the first terminal device transmits the i-th sidelink signal on the i-th sidelink of the at least two sidelinks according to the first transmission power of the i-th sidelink signal, and the corresponding second terminal device can receive the i-th sidelink signal from the first terminal device on the i-th sidelink of the at least two sidelinks.

[0301] Among them, after the process of determining the first transmission power introduced in S42, there may be a sidelink signal in the at least two sidelink signals whose first transmission power is 0. For the sidelink signal with the first transmission power of 0, the first terminal device actually does not transmit, but it can still be understood that the first terminal device transmits these sidelink signals according to the first transmission power of 0, and the corresponding second terminal device (that is, the receiving end of these sidelink signals) cannot receive the sidelink signal from the first terminal device. The second terminal device that can actually receive the sidelink signal is the sidelink signal with the first transmission power not equal to 0.

[0302] Of course, in S42, a special case is also introduced, if the first terminal device finally discards to only one sidelink signal, and the sidelink signal has a first transmission power still greater than P CMAX , the first terminal device can discard the sidelink signal, that is, the first terminal device does not transmit at least two sidelink signals. If this is the case, the first terminal device will not transmit the sidelink signal, and no second terminal device can receive the sidelink signal from the first terminal device.

[0303] In the embodiment of the present application, if the sum of the transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device, the terminal device can re-determine the transmission powers of the at least two sidelink signals (that is, determine the first transmission powers of the at least two sidelink signals) according to the priorities of the at least two sidelink signals. For example, after re-determining the transmission powers, the sum of the transmission powers of the at least two sidelink signals can be less than or equal to the maximum transmission power of the terminal device, so that the total transmission power of the terminal device when transmitting the sidelink signals is controlled within the capability range of the terminal device, and the terminal device can transmit the sidelink signals. The scheme provided in the embodiment of the present application provides a power control solution for the scenario in which the terminal device transmits sidelink signals to multiple receiving terminals. Through the power control manner, the transmission success rate of the sidelink signals is improved. Moreover, the terminal device can re-determine the transmission powers of the sidelink signals according to the priorities of the at least two sidelink signals. For example, for the sidelink signal with a higher priority, the transmission power of the sidelink signal can be kept consistent with the transmission power before re-determination or can have a small difference, so that the high-priority service can be transmitted as much as possible.

[0304] Figure 4 The embodiments introduced can be mainly used in the scenario in which one terminal device transmits sidelink signals to multiple terminal devices. According to the foregoing introduction, there can be another scenario in which one terminal device needs to simultaneously transmit a sidelink signal and an uplink signal. Therefore, the embodiment of the present application provides a second communication method for providing a power control mechanism in this scenario.

[0305] Please refer to Figure 4 , a flowchart of the second communication method. In the following introduction, the method is applied to the scenario in which one terminal device transmits a sidelink signal and an uplink signal to multiple terminal devices. Figure 4 or Figure 4The network architecture shown is for example. In addition, the method can be performed by three or more communication devices, one of which acts as a sending end of the uplink signal and the sidelink signal, one of which acts as a receiving end of the uplink signal, and the remaining communication devices act as receiving ends of the sidelink signal. For example, the communication device acting as the sending end of the signal is referred to as the first communication device, the communication device acting as the receiving end of the sidelink signal is referred to as the second communication device, and the communication device acting as the receiving end of the uplink signal is referred to as the third communication device. Among them, the first communication device, the second communication device, or the third communication device can be a network device or a communication device capable of supporting the network device to realize the functions required by the method, or can be a terminal device or a communication device capable of supporting the terminal device to realize the functions required by the method, and of course can be other communication devices, such as a chip system. And the implementation of the first communication device, the second communication device, or the third communication device is not limited, for example, the three communication devices can be implemented in the same form, for example, all implemented in the form of a device, or the three communication devices can be implemented in different forms, for example, the first communication device is implemented in the form of a device, the second communication device is implemented in the form of a chip system, and the third communication device is implemented in the form of a device, and the implementation forms of different second communication devices can be the same or different, etc. Among them, the network device is, for example, a base station.

[0306] For ease of introduction, in the following, the method is taken as an example by a terminal device, a terminal device and a network device, that is, the first communication device is a terminal device (for example, referred to as a first terminal device), the second communication device is a terminal device (for example, referred to as a second terminal device), and the third communication device is a network device. Because this embodiment is taken as an example of application in a wireless communication system, the first terminal device, the second terminal device, and the network device are taken as an example of a wireless communication system. Figure 4 Or Figure 10 The network architecture shown is for example. For example, the first terminal device described below can implement the function of the SUE in the network architecture shown in Figure 4 Or Figure 4 The network architecture shown is for example. For example, the first terminal device described below can implement the function of the SUE in the network architecture shown in Figure 4 Or Figure 4 The network architecture shown is for example. For example, the first terminal device described below can implement the function of the SUE in the network architecture shown in Figure 4 Or Figure 4 The network architecture shown is for example. For example, the first terminal device described below can implement the function of the SUE in the network architecture shown in

[0307] S71, the first terminal device determines to simultaneously send an uplink signal on an uplink and at least one sidelink signal on at least one sidelink.

[0308] The embodiment of the present application can provide a power control scheme when the sidelink signal and the uplink signal of the terminal device are concurrent. Among them, when the sidelink signal and the uplink signal of the first terminal device are concurrent, the resource occupation situation can refer to Figure 4It can be seen that, in the same time slot, the first terminal device needs to send an uplink signal, and also needs to send a sidelink signal, Figure 4 Taking the first terminal device sending two sidelink signals as an example, or taking the first terminal device sending two sidelink signals on two sidelinks as an example, the two sidelinks are SL1 and SL2 in FIG. 1, Figure 11 Figure 7 UL in FIG. 1 indicates an uplink used to carry an uplink signal.

[0309] S72, the first terminal device determines a transmission power of an i-th sidelink signal in the at least one sidelink signal according to a first transmission power, a power boosting amount, and a second transmission power, the first transmission power being a transmission power of the uplink signal when the first terminal device only sends the uplink signal, the second transmission power being a transmission power of the uplink signal when the first terminal device simultaneously sends the uplink signal and the at least one sidelink signal. i is an integer from 1 to N, and N is a number of the at least one sidelink signal.

[0310] Generally, the uplink service of the terminal device is more important, and therefore, when the uplink signal and the sidelink signal of the first terminal device are concurrent, the transmission power of the uplink signal can be preferentially guaranteed.

[0311] For example, the first terminal device can determine the second transmission power according to the first transmission power, and the first transmission power can be a transmission power of the uplink signal when the first terminal device only sends the uplink signal. For example, the first transmission power is less than or equal to a maximum transmission power P CMAX .

[0312] The first terminal device determines the second transmission power according to the first transmission power, and in one determination manner, the transmission power of the uplink signal can satisfy the following formula:

[0313] P UL = min{P1, P OPUSCH + 10 log 10 (2 u *M PUSCH )+ aPL+ ATF+ δ} [dBm] (Formula 13)

[0314] In formula 13, P UL represents the second transmission power. P1 represents the first transmission power. M PUSCH represents a bandwidth of an uplink channel included in the uplink in which the uplink signal is located (or is a bandwidth of the uplink channel in which the uplink signal is located), and the uplink channel is, for example, PUSCH. ​represents the expected received power of the uplink signal at the receiving end of the uplink signal (or the receiving end corresponding to the uplink). PL represents the path loss. a is a compensation parameter of the uplink path loss. △TF is a parameter related to the modulation and coding mode. δ represents the closed-loop power control adjustment amount. u represents the subcarrier spacing of the subcarrier where the uplink is located.

[0315] When the uplink signal of the first terminal device is concurrent with the sidelink signal, the embodiments of the present application redefine the maximum transmission power of the first terminal device. For example, the maximum transmission power of the first terminal device can satisfy the following formula:

[0316] P SU,CMAX =(1+λ)P1 (Formula 14)

[0317] P SU,CMAX represents the maximum transmission power of the first terminal device when the uplink signal and the sidelink signal are transmitted at the same time, for example, P SU,CMAX is less than or equal to P CMAX . λ represents the amount of increase in the maximum transmission power of the first terminal device when the first terminal device transmits the uplink signal and the sidelink signal at the same time, relative to the case where the first terminal device only transmits the uplink signal, for example, λ is called the power increase amount, and λ≥0. It can be understood that the network device can configure the transmission power for the first terminal device when the first terminal device only transmits the uplink signal. It is possible that the first terminal device can complete the transmission of the uplink signal without using P CMAX , then the transmission power can be less than P CMAX , or the transmission power can also be equal to P CMAX , in order to improve the transmission success rate of the uplink signal. The transmission power is, for example, P1. If P1 configured by the network device for the first terminal device when the first terminal device only transmits the uplink signal is less than P CMAX , then the first terminal device needs to transmit the sidelink signal and the uplink signal at the same time, and the transmission power of the first terminal device can still have a power increase amount. That is, the more signals the first terminal device needs to transmit, the more transmission power can be called to perform transmission, which can not only improve the transmission success rate of the signal, but also try to achieve energy saving.

[0318] When the uplink signal of the first terminal device is concurrent with the sidelink signal, the transmission power of the uplink signal can be preferentially guaranteed, and then the first terminal device can calculate the transmission power of the sidelink signal in a different way from the prior art.

[0319] The first terminal device transmits at least one sidelink signal on at least one sidelink (for the convenience of understanding, it can be considered that one sidelink transmits one sidelink signal, or that the sidelink and the sidelink signal are one-to-one), wherein the total transmission power of the at least one sidelink signal can satisfy the following formula:

[0320] ∑P SL ≤(1+λ)P1-P UL (Formula 15)

[0321] In Formula 15, ∑P SL represents the total transmission power of the at least one sidelink signal. P SL represents the transmission power of one of the at least one sidelink signal. P UL represents the second transmission power. In fact, (1+λ)P1 is equal to the maximum transmission power of the first terminal device when the first terminal device transmits the uplink signal and the sidelink signal at the same time, that is, the total transmission power of the at least one sidelink signal can be less than or equal to the difference between the maximum transmission power of the first terminal device when the first terminal device transmits the uplink signal and the sidelink signal at the same time and the second transmission power, so as to ensure that the capability of the first terminal device can support the first terminal device to transmit the uplink signal and the at least one sidelink signal.

[0322] For example, the first terminal device can determine the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boost amount, and the second transmission power. As an optional manner, the first terminal device determines the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boost amount, and the second transmission power can be that the first terminal device determines the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boost amount, the second transmission power, and the number of the at least one sidelink signal (or the number of the at least one sidelink). It can be understood that the first terminal device can determine the transmission power of the at least one sidelink signal according to the first information, and the first information can include the first transmission power, the power boost amount, and the second transmission power, and optionally, the first information can also include the number of the at least one sidelink signal. In addition, since i is an integer from 1 to N, it can also be understood that the first terminal device determines the transmission power of each sidelink signal in the at least one sidelink signal according to the first information.

[0323] The first terminal device determines the transmission power of each sidelink signal in the at least one sidelink signal in a similar manner, so the following takes the first terminal device determining the transmission power of the i-th sidelink signal in the at least one sidelink signal as an example, that is, the first terminal device determining the transmission power of one sidelink signal in the at least one sidelink signal as an example.

[0324] The ith sidelink signal, for example, includes a sidelink control signal, or includes a sidelink data signal, or includes both a sidelink control signal and a sidelink data signal. The first terminal device determines the transmission power of the ith sidelink signal according to the first transmission power, the power boost, the second transmission power, and the number of the at least one sidelink signal. In one determination manner, the transmission power of the sidelink control signal included in the ith sidelink signal can satisfy the following formula:

[0325]

[0326] wherein P PSCCH represents the transmission power of the sidelink control signal included in the ith sidelink signal, and the sidelink control channel carrying the sidelink control signal is, for example, PSCCH. M PSSCH represents the bandwidth of the sidelink data channel in which the sidelink data signal included in the ith sidelink signal is located, or the bandwidth of the sidelink data channel included in the ith sidelink, and the sidelink data channel is, for example, PSSCH. M PSCCH represents the bandwidth of the sidelink control channel in which the sidelink control signal included in the ith sidelink signal is located, or the bandwidth of the sidelink control channel included in the ith sidelink. P CMAX represents the maximum transmission power allowed by the first terminal device. PL represents the downlink power loss estimated by the first terminal device. In a communication system, especially in a TDD system, it is generally considered that the uplink and downlink losses are consistent, so this parameter is used to calculate the possible link loss from the first terminal device to the network device. P O_PSSCH,3 represents the power of the PSSCH expected to be received by the second terminal device corresponding to the ith sidelink (i.e., the receiving end of the ith sidelink signal). α PSSCH,3 is a filtering parameter configured in the current mode (for example, mode 3). min(a, b) represents the minimum value of a and b. N represents the number of the at least one sidelink signal, and N can be a positive integer. For other parameters involved in formula 16, please refer to the introduction of other formulas in the foregoing.

[0327] The first terminal device determines the transmission power of the ith sidelink signal according to the first transmission power, the power boost, the second transmission power, and the number of the at least one sidelink signal. In one determination manner, the transmission power of the sidelink data signal included in the ith sidelink signal can satisfy the following formula:

[0328]

[0329] For the parameters in formula 17, please refer to the introduction of the foregoing formula.

[0330] And the transmission power of the ith sidelink signal is equal to P PSSCH and PPSCCH The ith sidelink includes a sidelink data channel and a sidelink control channel, which can be referred to the introduction of the ith sidelink. Figure 7 The ith sidelink includes a sidelink data channel and a sidelink control channel, which can be referred to the introduction of the ith sidelink.

[0331] For example, when N = 1, that is, the number of the at least one sidelink is 1, the transmission power of the one sidelink can also be calculated according to the formula 16 and the formula 17.

[0332] As an example of the formula 16, N = 1, and then the formula 16 can be transformed as:

[0333]

[0334] The parameters in the formula 18 can be referred to the introduction of the parameters in the formula 16.

[0335] As an example of the formula 17, N = 1, and then the formula 17 can be transformed as:

[0336]

[0337] The parameters in the formula 19 can be referred to the introduction of the parameters in the formula 17.

[0338] S73, the first terminal device transmits the uplink signal according to the second transmission power, and transmits the ith sidelink signal according to the transmission power of the ith sidelink signal.

[0339] The first terminal device determines the second transmission power, and transmits the uplink signal on the uplink using the second transmission power. In addition, the first terminal device also determines the transmission power of the ith sidelink signal, and transmits the ith sidelink signal on the ith sidelink using the transmission power of the ith sidelink signal. The first terminal device can transmit the uplink signal and the at least one sidelink signal at the same time.

[0340] In the embodiments of the present application, the power control rule is provided for the scenario that the first terminal device needs to transmit the uplink signal and the sidelink signal at the same time, so that the first terminal device can complete the transmission of the uplink signal and the sidelink signal as much as possible, and the success rate of signal transmission is improved.

[0341] The device used to implement the above method in the embodiments of the present application will be described below with reference to the drawings. Therefore, the content in the foregoing can be used in the subsequent embodiments, and the repeated content will not be described herein.

[0342] Figure 7 A schematic block diagram of a communication device 900 provided in the embodiments of the present application is shown. For example, the communication device 900 is a terminal device 900.

[0343] The terminal device 900 includes a processing module 910 and a transceiver module 920. Exemplarily, the terminal device 900 can be a terminal equipment, or a chip or other combination device or component having the aforementioned terminal equipment functions applied in a terminal equipment. When the terminal device 900 is a terminal equipment, the transceiver module 920 can be a transceiver, which may include an antenna and radio frequency circuitry, etc., and the processing module 910 can be a processor, such as a baseband processor, which may include one or more central processing units (CPUs). When the terminal device 900 is a component having the aforementioned terminal functions, the transceiver module 920 can be a radio frequency unit, and the processing module 910 can be a processor, such as a baseband processor. When the terminal device 900 is a chip system, the transceiver module 920 can be the input / output interface of the chip system (e.g., a baseband chip), and the processing module can be the processor of the chip system, which may include one or more central processing units.

[0344] The processing module 910 can be used to execute... Figure 7 In the illustrated embodiment, all operations performed by the terminal device other than the transmit / receive operations, such as S41 and S42, and / or other processes used to support the techniques described herein, are included. The transceiver module 920 can be used to perform... Figure 7 The embodiments shown include all transmit and receive operations performed by the terminal device, such as S43, and / or other processes used to support the techniques described herein.

[0345] Additionally, the transceiver module 920 can be a functional module capable of performing both sending and receiving operations. For example, the transceiver module 920 can be used to execute... Figure 12 In the illustrated embodiment, all sending and receiving operations are performed by the terminal device. For example, when performing a sending operation, the transceiver module 920 can be considered as the sending module, and when performing a receiving operation, the transceiver module 920 can be considered as the receiving module; alternatively, the transceiver module 920 can also be a collective term for two functional modules, namely the sending module and the receiving module. The sending module is used to complete the sending operation. For example, the sending module can be used to perform... Figure 7 In the illustrated embodiment, the receiving module performs all the sending operations executed by the terminal device, and the receiving module performs the receiving operations. For example, the receiving module can be used to execute... Figure 7 The embodiments shown depict all receiving operations performed by the terminal device.

[0346] For example, processing module 910 is used to determine the initial transmission power of each of at least two side-line signals;

[0347] The sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device 900. The processing module 910 is further configured to determine, according to the priorities of the at least two sidelink signals, a first transmission power of an i th sidelink signal in the at least two sidelink signals, i being an integer from 1 to N, and N being the number of the at least two sidelink signals.

[0348] The transceiver module 920 is configured to transmit the i th sidelink signal on an i th sidelink in the at least two sidelinks according to the first transmission power of the i th sidelink signal.

[0349] Alternatively, the processing module 910 is configured to determine an initial transmission power of each sidelink signal in the at least two sidelink signals.

[0350] The processing module 910 is further configured to, when the sum of the initial transmission powers of the at least two sidelink signals is greater than the maximum transmission power of the terminal device 900, determine, according to the priorities of the at least two sidelink signals, a first transmission power of an i th sidelink signal in the at least two sidelink signals, i being an integer from 1 to N, and N being the number of the at least two sidelink signals.

[0351] The transceiver module 920 is configured to transmit the i th sidelink signal on an i th sidelink in the at least two sidelinks according to the first transmission power of the i th sidelink signal.

[0352] As an optional implementation, the processing module 910 is configured to determine, according to the priorities of the at least two sidelink signals, a first transmission power of an i th sidelink signal in the at least two sidelink signals by the following manner:

[0353] determine the first transmission power of the i th sidelink signal according to a first power control factor corresponding to the i th sidelink signal, wherein the first power control factor corresponding to the i th sidelink signal is determined according to the priority of the i th sidelink signal.

[0354] As an optional implementation, the processing module 910 is configured to determine, according to a first power control factor corresponding to the i th sidelink signal, the first transmission power of the i th sidelink signal by the following manner:

[0355] The first transmission power of the i th sidelink signal satisfies the following formula:

[0356] P′ SLj,i =P CMAX +10lg{(λ i *P SLj,i ) / ∑λ i *P SLj,i}

[0357] wherein P' i represents the first transmission power of the ith sidelink signal, P SLj,i CMAX wherein P max represents the maximum transmission power of the terminal device 900, λ i SLj,i wherein P i represents the initial transmission power of the ith sidelink signal.

[0358] As an optional implementation, the ith sidelink signal comprises a sidelink control signal and a sidelink data signal, P SLj,i PSCCH,i + P PSSCH,i wherein P PSCCH,i PSSCH,i wherein P

[0359] As an optional implementation, P PSCCH,i satisfies the following formula:

[0360]

[0361] wherein P PSCCH,i CMAX wherein P max represents the maximum transmission power of the terminal device 900, M PSCCH PSSCH wherein M represents the bandwidth of the sidelink control channel on which the sidelink control signal comprised in the ith sidelink signal is located, M PSSCH,3 wherein α represents the filtering parameter, and PL represents the path loss.

[0362] As an optional implementation, P PSSCH,i satisfies the following formula:

[0363]

[0364] wherein P PSSCH,i CMAX wherein P max represents the maximum transmission power of the terminal device 900, M PSCCH PSSCH wherein M represents the bandwidth of the control channel on which the control signal comprised in the ith sidelink signal is located, M PSSCH,3 wherein α represents the filtering parameter, and PL represents the path loss.​​​​​​ represents the received power of the sidelink data signal expected by a receiving end of the ith sidelink signal, and α PSSCH,3 represents a filtering parameter, and PL represents a path loss.

[0365] As an optional implementation, PL satisfies the following formula:

[0366] PL = min{PL UP , γ i *PL SL,j}; or,

[0367] PL = max{PL min , min{PL UL , γ i *PL SL,i}}; or,

[0368] PL = min{max{PL min , PL UL}, γ i *PL SL,i};

[0369] wherein PL UP represents a path loss between the terminal device 900 and a network device, γ i represents a second power control factor of the ith sidelink signal, a value of the second power control factor being determined according to a priority of the ith sidelink signal, and PL min represents a first threshold of the path loss.

[0370] As an optional implementation, the processing module 910 is configured to determine the first transmission power of the ith sidelink signal among the at least two sidelink signals according to priorities of the at least two sidelink signals in the following manner:

[0371] determining the first transmission power of part of the at least two sidelink signals to be 0, until a sum of initial transmission powers of sidelink signals whose initial transmission powers are not 0 is less than or equal to a maximum transmission power of the terminal device 900, the priorities of the part of the at least two sidelink signals being less than or equal to the priorities of the sidelink signals whose initial transmission powers are not 0.

[0372] It should be understood that the processing module 910 in the embodiments of the present application can be implemented by a processor or a processor-related circuit component, and the transceiver module 920 can be implemented by a transceiver or a transceiver-related circuit component.

[0373] As Figure 7As shown, the embodiments of the present application also provide a communication apparatus 1000. Exemplarily, the communication apparatus 1000 is a terminal apparatus 1000. Exemplarily, the terminal apparatus 1000 can be a communication device, for example, a terminal device, or can also be a chip system, etc. The terminal apparatus 1000 comprises a processor 1010. Optionally, the terminal apparatus 1000 can also comprise a memory 1020. Optionally, the terminal apparatus 1000 can also comprise a transceiver 1030. The memory 1020 stores computer instructions or programs, and the processor 1010 can execute the computer instructions or programs stored in the memory 1020. When the computer instructions or programs stored in the memory 1020 are executed, the processor 1010 is configured to perform the operations performed by the processing module 910 in the above embodiments, and the transceiver 1030 is configured to perform the operations performed by the transceiving module 920 in the above embodiments. Alternatively, the terminal apparatus 1000 can also not comprise the memory 1020, for example, the memory is located outside the terminal apparatus 1000. When the computer instructions or programs stored in the external memory are executed, the processor 1010 is configured to perform the operations performed by the processing module 910 in the above embodiments, and the transceiver 1030 is configured to perform the operations performed by the transceiving module 920 in the above embodiments.

[0374] The transceiver 1030 can be a functional unit that can complete both the sending operation and the receiving operation. For example, the transceiver 1030 can be configured to perform the sending operation of the terminal apparatus in the above embodiments, and can be configured to perform the receiving operation of the terminal apparatus in the above embodiments. Figure 7 The transceiver 1030 can be a functional unit that can complete both the sending operation and the receiving operation. For example, the transceiver 1030 can be configured to perform the sending operation of the terminal apparatus in the above embodiments, and can be configured to perform the receiving operation of the terminal apparatus in the above embodiments. Figure 7 The transceiver 1030 can be a functional unit that can complete both the sending operation and the receiving operation. For example, the transceiver 1030 can be configured to perform the sending operation of the terminal apparatus in the above embodiments, and can be configured to perform the receiving operation of the terminal apparatus in the above embodiments. Figure 7 The transceiver 1030 can be a functional unit that can complete both the sending operation and the receiving operation. For example, the transceiver 1030 can be configured to perform the sending operation of the terminal apparatus in the above embodiments, and can be configured to perform the receiving operation of the terminal apparatus in the above embodiments.

[0375] In addition, if the communication apparatus 1000 is a chip system, the transceiver 1030 can also be implemented through a communication interface of the chip system. The communication interface is connected with a radio frequency transceiving component in the communication device to realize the transceiving of information through the radio frequency transceiving component. The communication interface can be a functional unit that can complete both the sending operation and the receiving operation. For example, the communication interface can be configured to perform the sending operation of the terminal apparatus in the above embodiments, and can be configured to perform the receiving operation of the terminal apparatus in the above embodiments. Figure 7All the sending operations and receiving operations performed by the terminal device in the embodiments shown, for example, when performing a sending operation, the communication interface can be considered as a sending interface, and when performing a receiving operation, the communication interface can be considered as a receiving interface; or the communication interface can also be a general term of two functional units, which are a sending interface and a receiving interface respectively, the sending interface is used to complete a sending operation, for example, the sending interface can be used to perform Figure 7 All the sending operations performed by the terminal device in the embodiments shown, the receiving interface is used to complete a receiving operation, for example, the receiving interface can be used to perform Figure 13 All the receiving operations performed by the terminal device in the embodiments shown.

[0376] It should be understood that the terminal device 900 or the terminal device 1000 according to the embodiments of the present application can realize the functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 900 or the terminal device 1000 are respectively used to realize the corresponding processes in the embodiments shown, which will not be described here in detail for the sake of brevity. Figure 13 The functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 900 or the terminal device 1000 are respectively used to realize the corresponding processes in the embodiments shown, which will not be described here in detail for the sake of brevity. Figure 13 The functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 900 or the terminal device 1000 are respectively used to realize the corresponding processes in the embodiments shown, which will not be described here in detail for the sake of brevity.

[0377] Figure 13 A schematic block diagram of the communication device 1100 provided by the embodiments of the present application is shown. Exemplarily, the communication device 1100 is, for example, a terminal device 1100.

[0378] The terminal device 1100 includes a processing module 1110. Optionally, it also includes a transceiver module 1120. Exemplarily, the terminal device 1100 can be a terminal device, or a chip applied to the terminal device or other combination devices, components and the like having the above-mentioned terminal device functions. When the terminal device 1100 is a terminal device, the transceiver module 1120 can be a transceiver, which can include an antenna and a radio frequency circuit and the like, and the processing module 1110 can be a processor, for example, a baseband processor, which can include one or more CPUs. When the terminal device 1100 is a component having the above-mentioned terminal functions, the transceiver module 1120 can be a radio frequency unit, and the processing module 1110 can be a processor, for example, a baseband processor. When the terminal device 1100 is a chip system, the transceiver module 1120 can be an input / output interface of the chip system (for example, a baseband chip), and the processing module can be a processor of the chip system, which can include one or more central processing units.

[0379] The processing module 1110 can be used to perform all the operations performed by the terminal device in the embodiments shown, except for the transceiver operations, for example, S71 and S72, and / or other processes for supporting the technologies described herein. The transceiver module 1120 can be used to perform Figure 13 The processing module 1110 can be used to perform all the operations performed by the terminal device in the embodiments shown, except for the transceiver operations, for example, S71 and S72, and / or other processes for supporting the technologies described herein. The transceiver module 1120 can be used to perform Figure 4All the receiving operations performed by the terminal device in the embodiments shown, for example, S73, and / or other processes for supporting the technologies described herein.

[0380] In addition, the transceiver module 1120 can be a functional module that can complete both sending operations and receiving operations, for example, the transceiver module 1120 can be used to perform Figure 4 All the sending operations and receiving operations performed by the terminal device in the embodiments shown, for example, when performing a sending operation, the transceiver module 1120 can be considered as a sending module, and when performing a receiving operation, the transceiver module 1120 can be considered as a receiving module; or the transceiver module 1120 can also be a general term for two functional modules, which are a sending module and a receiving module respectively, the sending module is used to complete a sending operation, for example, the sending module can be used to perform Figure 7 All the sending operations performed by the terminal device in the embodiments shown, the receiving module is used to complete a receiving operation, for example, the receiving module can be used to perform Figure 7 All the receiving operations performed by the terminal device in the embodiments shown.

[0381] For example, the processing module 1110 is configured to determine to simultaneously send an uplink signal on an uplink and send at least one sidelink signal on at least one sidelink;

[0382] The processing module 1110 is further configured to determine a sending power of an i-th sidelink signal in the at least one sidelink signal according to a first sending power, a power boost amount, and a second sending power, the first sending power is a sending power of the uplink signal when the terminal device 1100 only sends the uplink signal, the second sending power is a sending power of the uplink signal when the terminal device 1100 simultaneously sends the uplink signal and the at least one sidelink signal, the power boost amount represents an amount of increase of a maximum sending power of the terminal device 1100 when the terminal device 1100 simultaneously sends the uplink signal and the sidelink signal relative to a case where the terminal device 1100 only sends the uplink signal, i is an integer from 1 to N, and N is a number of the at least one sidelink signal.

[0383] As an optional implementation, the total sending power of the at least one sidelink signal satisfies the following formula:

[0384] ∑P SL ≤(1+λ)P1-P UL

[0385] Wherein, ∑P SL represents the total sending power of the at least one sidelink signal, λ represents the power boost amount, P1 represents the first sending power, and P UL represents the second sending power.

[0386] As an optional implementation, the processing module is configured to determine the transmission power of the i-th sidelink signal in the at least one sidelink signal according to the first transmission power, the power boosting amount, and the second transmission power in the following manner:

[0387] determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal.

[0388] As an optional implementation, the processing module 1110 is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal in the following manner:

[0389] The transmission power of the sidelink control signal included in the i-th sidelink signal satisfies the following formula:

[0390]

[0391] wherein P PSCCH represents the transmission power of the sidelink control signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P UL represents the second transmission power, M PSCCH represents the bandwidth of the sidelink control channel occupied by the sidelink control signal included in the first sidelink signal, M PSSCH represents the bandwidth of the sidelink data channel occupied by the sidelink data signal included in the first sidelink signal, represents the reception power of the sidelink data signal expected by the reception end of the i-th sidelink signal, α PSSCH,3 represents a filtering parameter, and PL represents path loss.

[0392] As an optional implementation, the processing module 1110 is configured to determine the transmission power of the i-th sidelink signal according to the first transmission power, the power boosting amount, the second transmission power, and the number of the at least one sidelink signal in the following manner:

[0393] The transmission power of the sidelink data signal included in the i-th sidelink signal satisfies the following formula:

[0394]

[0395] wherein P PSsCH represents the transmission power of the sidelink data signal included in the i-th sidelink signal, λ represents the power boosting amount, P1 represents the first transmission power, P ULM represents the second transmission power. PSCCH M represents the bandwidth of the sideline control channel occupied by the sideline control signals included in the i-th sideline signal. PSSCH P represents the bandwidth of the sideline data channel occupied by the sideline data signals included in the i-th sideline signal. OPSSCH,3 α represents the desired received power of the sideline data signal at the receiver of the i-th sideline signal. PSSCH,3 PL represents the path loss, where PL represents the filtering parameters.

[0396] As an optional implementation, the processing module 1110 is further configured to determine the second transmission power based on the first transmission power.

[0397] As an optional implementation, the processing module 1110 is configured to determine the second transmission power based on the first transmission power in the following manner:

[0398] The second transmission power satisfies the following formula:

[0399] P UL =min{P1,P OPUSCH +10log 10 (2 u *M PUSCH )+α·PL+△TF+δ}[dBm

[0400] Among them, P UL P1 represents the second transmission power, M represents the first transmission power, and M represents the second transmission power. PUSCH This indicates the bandwidth of the channel occupied by the uplink signal. The uplink signal is represented by the receiver's expected received power, PL represents the path loss, α is the uplink path loss compensation parameter, ΔTF is a parameter related to the modulation and coding scheme, δ represents the closed-loop power control adjustment amount, and u represents the subcarrier spacing of the subcarrier in which the uplink signal is located.

[0401] It should be understood that the processing module 1110 in the embodiments of this application can be implemented by a processor or processor-related circuit components, and the transceiver module 1120 can be implemented by a transceiver or transceiver-related circuit components.

[0402] like Figure 14As shown, the embodiments of the present application also provide a communication device 1200. Exemplarily, the communication device 1200 is, for example, a terminal device 1200. Exemplarily, the terminal device 1200 can be a communication apparatus, for example, a terminal apparatus, or can also be a chip system, etc. The terminal device 1200 comprises a processor 1210. Optionally, it can also comprise a memory 1220. Optionally, it can also comprise a transceiver 1230. The memory 1220 stores computer instructions or programs, and the processor 1210 can execute the computer instructions or programs stored in the memory 1220. When the computer instructions or programs stored in the memory 1220 are executed, the processor 1210 is configured to perform the operations performed by the processing module 1110 in the above-described embodiments, and the transceiver 1230 is configured to perform the operations performed by the transceiving module 1120 in the above-described embodiments. Alternatively, the terminal device 1200 can also not comprise the memory 1220, for example, the memory is located outside the terminal device 1200, and when the computer instructions or programs stored in the external memory are executed, the processor 1210 is configured to perform the operations performed by the processing module 1110 in the above-described embodiments, and the transceiver 1230 is configured to perform the operations performed by the transceiving module 1120 in the above-described embodiments.

[0403] The transceiver 1230 can be a functional unit that can complete both the sending operation and the receiving operation. For example, the transceiver 1230 can be configured to perform the sending operation of the terminal device 1200, and can also be configured to perform the receiving operation of the terminal device 1200. Figure 10 In the embodiments shown, all the sending operations and receiving operations performed by the terminal device 1200, for example, when the sending operation is performed, the transceiver 1230 can be considered as a sender, and when the receiving operation is performed, the transceiver 1230 can be considered as a receiver; or the transceiver 1230 can also be a general term for two functional units, which are a sender and a receiver respectively, the sender is configured to complete the sending operation, for example, the sender can be configured to perform the sending operation of the terminal device 1200, and the receiver is configured to complete the receiving operation, for example, the receiver can be configured to perform the receiving operation of the terminal device 1200. Figure 12 In the embodiments shown, all the sending operations performed by the terminal device 1200, the receiver is configured to complete the receiving operation, for example, the receiver can be configured to perform the receiving operation of the terminal device 1200. Figure 14 In the embodiments shown, all the receiving operations performed by the terminal device 1200.

[0404] In addition, if the communication device 1200 is a chip system, the transceiver 1230 can also be implemented through a communication interface of the chip system, which is connected with a radio frequency transceiving component in the communication apparatus to realize the transceiving of information through the radio frequency transceiving component. The communication interface can be a functional unit that can complete both the sending operation and the receiving operation. For example, the communication interface can be configured to perform the sending operation of the terminal device 1200, and can also be configured to perform the receiving operation of the terminal device 1200. Figure 14All the sending operations and receiving operations performed by the terminal device in the embodiments shown, for example, when performing a sending operation, the communication interface can be considered as a sending interface, and when performing a receiving operation, the communication interface can be considered as a receiving interface; or the communication interface can also be a general term of two functional units, which are a sending interface and a receiving interface respectively, the sending interface is used to complete a sending operation, for example, the sending interface can be used to perform Figure 14 All the sending operations performed by the terminal device in the embodiments shown, the receiving interface is used to complete a receiving operation, for example, the receiving interface can be used to perform Figure 14 All the receiving operations performed by the terminal device in the embodiments shown.

[0405] It should be understood that the terminal device 1100 or the terminal device 1200 according to the embodiments of the present application can realize the functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 110 or the terminal device 1200 are respectively to realize the corresponding flow in the embodiments shown, which will not be repeated here for the sake of brevity. Figure 14 It should be understood that the terminal device 1100 or the terminal device 1200 according to the embodiments of the present application can realize the functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 110 or the terminal device 1200 are respectively to realize the corresponding flow in the embodiments shown, which will not be repeated here for the sake of brevity. Figure 14 It should be understood that the terminal device 1100 or the terminal device 1200 according to the embodiments of the present application can realize the functions of the terminal device in the embodiments shown, and the operations and / or functions of each module in the terminal device 110 or the terminal device 1200 are respectively to realize the corresponding flow in the embodiments shown, which will not be repeated here for the sake of brevity.

[0406] The embodiments of the present application also provide a communication device, which can be a terminal device or a circuit. The communication device can be used to perform the actions performed by the terminal device in the method embodiments described above.

[0407] When the communication device is a terminal device, Figure 15 A simplified structure diagram of a terminal device is shown. For the sake of understanding and illustration, Figure 4 In the embodiments shown, the terminal device takes a mobile phone as an example. As shown, Figure 7 The terminal device includes a processor, a memory, a radio frequency circuit, an antenna and an input / output device. The processor is mainly used for processing communication protocols and communication data, controlling the terminal device, executing software programs, processing data of the software programs, etc. The memory is mainly used for storing software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. The input / output device, such as a touch screen, a display screen, a keyboard, etc., is mainly used for receiving user input data and outputting data to the user. It should be noted that some types of terminal devices can not have an input / output device.

[0408] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the radio frequency (RF) circuit. The RF circuit then processes the baseband signal and transmits it outward as electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts it into a baseband signal, and outputs the baseband signal to the processor. The processor then converts the baseband signal back into data and processes it. For ease of explanation, Figure 4 Only one memory and processor are shown in the illustration. In actual terminal device products, there may be one or more processors and one or more memories. Memory may also be referred to as storage medium or storage device, etc. Memory may be set up independently of the processor or integrated with the processor; this application does not limit this.

[0409] In this embodiment, the antenna and radio frequency circuit with transceiver functions can be considered as the transceiver unit of the terminal device, and the processor with processing functions can be considered as the processing unit of the terminal device. For example... Figure 7 As shown, the terminal device includes a transceiver unit 1310 and a processing unit 1320. The transceiver unit can also be called a transceiver, transceiver machine, transceiver device, etc. The processing unit can also be called a processor, processing board, processing module, processing device, etc. Optionally, the device in the transceiver unit 1310 used to implement the receiving function can be considered as a receiving unit, and the device in the transceiver unit 1310 used to implement the transmitting function can be considered as a transmitting unit; that is, the transceiver unit 1310 includes a receiving unit and a transmitting unit. The transceiver unit can sometimes also be called a transceiver, transceiver, or transceiver circuit, etc. The receiving unit can sometimes be called a receiver, receiver, or receiving circuit, etc. The transmitting unit can sometimes be called a transmitter, transmitter, or transmitting circuit, etc.

[0410] It should be understood that the transceiver unit 1310 is used to perform the sending and receiving operations on the terminal device side in the above method embodiment, and the processing unit 1320 is used to perform other operations on the terminal device in the above method embodiment besides the sending and receiving operations.

[0411] For example, in one implementation, the transceiver unit 1310 is used to perform... Figure 4 In the illustrated embodiment, all transmission and reception operations of the terminal device, such as S43, and / or the transceiver unit 1310 is also used to perform other processes supporting the techniques described herein. The processing unit 1320 is used to execute... Figure 9 In the embodiments shown, all operations performed by the terminal device other than the transmit and receive operations, such as S41 and S42, and / or the processing unit 1320 is also used to perform other processes that support the technology described herein.

[0412] For example, in one implementation, the transceiver unit 1310 is used to perform... Figure 10 In the illustrated embodiment, all transmission and reception operations of the terminal device, such as S73, and / or the transceiver unit 1310 is also used to perform other processes supporting the techniques described herein. The processing unit 1320 is used to execute... Figure 7 In the embodiments shown, all operations performed by the terminal device other than the transmit and receive operations, such as S71 and S72, and / or the processing unit 1320 is also used to perform other processes that support the technology described herein.

[0413] When the communication device is a chip-based device or circuit, it may include a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit and / or a communication interface; the processing unit may be an integrated processor, microprocessor, or integrated circuit.

[0414] When the communication device in this embodiment is a terminal device, it can be referred to Figure 11 The device shown. As an example, this device can perform similar tasks. Figure 12 The functions of the processor 1010. Or, as an example, the device can perform similar tasks. Figure 4 The functions of the 1210 processor. Figure 4 The device includes a processor 1410, a data transmission processor 1420, and a data reception processor 1430. The processing module 910 in the above embodiment can be... Figure 4 The processor 1410 in the above embodiment performs the corresponding functions; the transceiver module 920 in the above embodiment can be... Figure 7 The data transmission processor 1420 and / or data reception processor 1430 in the above embodiment. Alternatively, the processing module 1110 in the above embodiment may be... Figure 7 The processor 1410 in the above embodiment performs the corresponding functions; the transceiver module 1120 in the above embodiment can be... Figure 7 The transmitting data processor 1420 and / or receiving data processor 1430 are included. Although Figure 4 The diagram shows a channel encoder and a channel decoder, but it is understood that these modules are not limiting to this embodiment and are merely illustrative.

[0415] Figure 7This illustrates another form of the present embodiment. The processing device 1500 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem. The communication device in this embodiment can serve as the modulation subsystem. Specifically, the modulation subsystem may include a processor 1503 and an interface 1504. The processor 1503 performs the functions of the aforementioned processing module 910, and the interface 1504 performs the functions of the aforementioned transceiver module 920. Alternatively, the processor 1503 performs the functions of the aforementioned processing module 1110, and the interface 1504 performs the functions of the aforementioned transceiver module 1120. As another variation, the modulation subsystem includes a memory 1506, a processor 1503, and a program stored in the memory 1506 and executable on the processor. When the processor 1503 executes the program, it implements the method on the terminal device side in the above method embodiment. It should be noted that the memory 1506 can be non-volatile or volatile, and its location can be inside the modulation subsystem or within the processing device 1500, as long as the memory 1506 can be connected to the processor 1503.

[0416] This application also provides a communication system. This communication system may include at least one of the above-described components. Figure 4 The terminal device involved in the illustrated embodiments; or, including at least one of the above-described... Figure 7 The terminal device involved in the illustrated embodiments; or, including at least one of the above-described... ​ The terminal device involved in the illustrated embodiment, and including at least one of the above-described components. ​ The terminal device involved in the illustrated embodiment. ​ The terminal device involved in the illustrated embodiments is, for example, ​ Terminal device 900 or ​ Terminal device 1000 in the middle, ​ The terminal device involved in the illustrated embodiments is, for example, ​ Terminal device 1100 or ​ Terminal device 1200 in the middle. For example. ​ The terminal device involved in the illustrated embodiments can be used to perform... ​ All operations performed by the terminal device in the illustrated embodiment, such as ​ S41 to S43 in the illustrated embodiments, and / or other processes used to support the techniques described herein. ​ The terminal device involved in the illustrated embodiments can be used to perform... ​ All operations performed by the terminal device in the illustrated embodiment, such as ​ S71 to S73 in the illustrated embodiments, and / or other processes used to support the techniques described herein.

[0417] The embodiment of the present application further provides a computer readable storage medium for storing a computer program, and the computer program is executed by a computer, and the computer can realize the method embodiment provided by the above method embodiment ​ the flow related to the terminal device in the embodiment shown.

[0418] The embodiment of the present application further provides a computer readable storage medium for storing a computer program, and the computer program is executed by a computer, and the computer can realize the method embodiment provided by the above method embodiment ​ the flow related to the terminal device in the embodiment shown.

[0419] The embodiment of the present application further provides a computer program product for storing a computer program, and the computer program is executed by a computer, and the computer can realize the method embodiment provided by the above method embodiment ​ the flow related to the terminal device in the embodiment shown.

[0420] The embodiment of the present application further provides a computer program product for storing a computer program, and the computer program is executed by a computer, and the computer can realize the method embodiment provided by the above method embodiment ​ the flow related to the terminal device in the embodiment shown.

[0421] It should be understood that the processor mentioned in the embodiment of the present application can be a CPU, and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0422] It should also be understood that the memory mentioned in the embodiments of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically EPROM (EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM) used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM) and direct rambus RAM (DR RAM).

[0423] It should be noted that when the processor is a general processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) is integrated in the processor.

[0424] It should be noted that the memory described herein is intended to include, but not limited to, these and any other suitable types of memory.

[0425] It should be understood that in various embodiments of the present application, the size of the sequence number of each process described above does not mean the order of execution, the execution order 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 application.

[0426] Those skilled in the art can clearly understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0427] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0428] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms.

[0429] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0430] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically independently, or two or more units can be integrated into one unit.

[0431] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the parts of the technical solutions that essentially contribute to the prior art or the parts of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0432] The above is only a specific implementation of the present application, but the protection scope of the embodiments of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the embodiments of the present application, which should be covered within the protection scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application should be subject to the protection scope of the claims.

Claims

1. A communication method, characterized in that, include: The terminal device determines the initial transmission power of each of at least two sideline signals; The sum of the initial transmission powers of the at least two side-going signals is greater than the maximum transmission power of the terminal device. The terminal device determines the first transmission power of the i-th side-going signal among the at least two side-going signals according to the priority of the at least two side-going signals, where i is an integer from 1 to N and N is the number of the at least two side-going signals. The terminal device transmits the i-th side link on the i-th side link in at least two side links according to the first transmission power of the i-th side link; The terminal device determines the first transmission power of the i-th side-link signal among the at least two side-link signals based on the priority of the at least two side-link signals, including: The terminal device determines the first transmission power of the i-th side-link signal based on the first power control factor corresponding to the i-th side-link signal, wherein the value of the first power control factor corresponding to the i-th side-link signal is determined according to the priority of the i-th side-link signal; or, The terminal device determines that the first transmission power of a portion of the at least two side-going signals is 0 until the sum of the initial transmission powers of the remaining side-going signals with non-zero initial transmission powers is less than or equal to the maximum transmission power of the terminal device, wherein the priority of the portion of side-going signals is less than or equal to the priority of the side-going signals with non-zero initial transmission powers.

2. The method according to claim 1, characterized in that, The terminal device determines the first transmission power of the i-th side-link signal based on the first power control factor corresponding to the i-th side-link signal, including: The first transmission power of the i-th side-row signal satisfies the following formula: ( ) / } in, This represents the first transmission power of the i-th side-line signal. This indicates the maximum transmission power of the terminal device. This represents the first power control factor corresponding to the i-th side-line signal. This represents the initial transmission power of the i-th side-line signal.

3. The method according to claim 2, characterized in that, The i-th side-going signal includes a side-going control signal and a side-going data signal. = ,in, This indicates the initial transmission power of the side-link control signals included in the i-th side-link signal. This indicates the initial transmission power of the sideline data signals included in the i-th sideline signal.

4. The method according to claim 3, characterized in that, Satisfy the following formula: in, This indicates the initial transmission power of the side-link control signals included in the i-th side-link signal. This indicates the maximum transmission power of the terminal device. This represents the bandwidth of the sideline control channel containing the sideline control signals included in the i-th sideline signal. This represents the bandwidth of the sideline data channel in which the sideline data signal included in the i-th sideline signal resides. This represents the desired received power of the sideline data signal at the receiver of the i-th sideline signal. PL represents the path loss, where PL represents the filtering parameters.

5. The method according to claim 3 or 4, characterized in that, Satisfy the following formula: in, This indicates the initial transmission power of the data signal included in the i-th side-row signal. This indicates the maximum transmission power of the terminal device. This represents the bandwidth of the control channel containing the control signals included in the i-th side-row signal. This represents the bandwidth of the sideline data channel in which the sideline data signal included in the i-th sideline signal resides. This represents the desired received power of the sideline data signal at the receiver of the i-th sideline signal. PL represents the path loss, where PL represents the filtering parameters.

6. The method according to any one of claims 2 to 4, characterized in that, PL satisfies the following formula: ;or, ;or, ； in, This indicates the path loss between the terminal device and the network equipment. The second power control factor represents the i-th side-link signal, and the value of the second power control factor is determined according to the priority of the i-th side-link signal. Indicates the first threshold for road damage. This represents the link loss of the i-th side link.

7. A terminal device, characterized in that, include: A processing module is used to determine the initial transmission power of each of at least two side-line signals; The sum of the initial transmission powers of the at least two side-going signals is greater than the maximum transmission power of the terminal device. The processing module is further configured to determine the first transmission power of the i-th side-going signal among the at least two side-going signals according to the priority of the at least two side-going signals, where i is an integer from 1 to N and N is the number of the at least two side-going signals. The transceiver module is configured to transmit the i-th side-link signal on the i-th side-link among at least two side-links, based on the first transmission power of the i-th side-link signal; wherein, The processing module is configured to determine the first transmission power of the i-th side-line signal among the at least two side-line signals according to the priority of the at least two side-line signals in the following manner: Based on the first power control factor corresponding to the i-th side-link signal, the first transmission power of the i-th side-link signal is determined, wherein the value of the first power control factor corresponding to the i-th side-link signal is determined according to the priority of the i-th side-link signal; or, The first transmission power of a portion of the at least two side-going signals is determined to be 0 until the sum of the initial transmission powers of the remaining side-going signals with non-zero initial transmission powers is less than or equal to the maximum transmission power of the terminal device. The priority of the portion of side-going signals is less than or equal to the priority of the side-going signals with non-zero initial transmission powers.

8. The terminal device according to claim 7, characterized in that, The processing module is configured to determine the first transmission power of the i-th side-link signal based on the first power control factor corresponding to the i-th side-link signal in the following manner: The first transmission power of the i-th side-row signal satisfies the following formula: ( ) / } in, This represents the first transmission power of the i-th side-line signal. This indicates the maximum transmission power of the terminal device. This represents the first power control factor corresponding to the i-th side-line signal. This represents the initial transmission power of the i-th side-line signal.

9. The terminal device according to claim 8, characterized in that, The i-th side-going signal includes a side-going control signal and a side-going data signal. = ,in, This indicates the initial transmission power of the side-link control signals included in the i-th side-link signal. This indicates the initial transmission power of the sideline data signals included in the i-th sideline signal.

10. The terminal device according to claim 9, characterized in that, Satisfy the following formula: in, This indicates the initial transmission power of the side-link control signals included in the i-th side-link signal. This indicates the maximum transmission power of the terminal device. This represents the bandwidth of the sideline control channel containing the sideline control signals included in the i-th sideline signal. This represents the bandwidth of the sideline data channel in which the sideline data signal included in the i-th sideline signal resides. This represents the desired received power of the sideline data signal at the receiver of the i-th sideline signal. PL represents the path loss, where PL represents the filtering parameters.

11. The terminal device according to claim 9 or 10, characterized in that, Satisfy the following formula: in, This indicates the initial transmission power of the data signal included in the i-th side-row signal. This indicates the maximum transmission power of the terminal device. This represents the bandwidth of the control channel containing the control signals included in the i-th side-row signal. This represents the bandwidth of the sideline data channel in which the sideline data signal included in the i-th sideline signal resides. This represents the desired received power of the sideline data signal at the receiver of the i-th sideline signal. PL represents the path loss, where PL represents the filtering parameters.

12. The terminal device according to any one of claims 8 to 10, characterized in that, PL satisfies the following formula: ;or, ;or, ； in, This indicates the path loss between the terminal device and the network equipment. The second power control factor represents the i-th side-link signal, and the value of the second power control factor is determined according to the priority of the i-th side-link signal. Indicates the first threshold for road damage. This represents the link loss of the i-th side link.

13. A computer-readable storage medium, characterized in that, The computer-readable storage medium is used to store a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1 to 6.

14. A communication device, characterized in that, The communication device includes: Memory, used to store instructions; At least one processor is configured to retrieve and execute the instructions from the memory, such that the communication device implements the method as described in any one of claims 1 to 6.

15. A computer program product, characterized in that, The computer program product is used to store a computer program that, when run on a computer, causes the computer to perform the method as described in any one of claims 1 to 6.

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